CN1496730A - Electric bed, control device and control method thereof - Google Patents

Electric bed, control device and control method thereof Download PDF

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Publication number
CN1496730A
CN1496730A CNA2003101023483A CN200310102348A CN1496730A CN 1496730 A CN1496730 A CN 1496730A CN A2003101023483 A CNA2003101023483 A CN A2003101023483A CN 200310102348 A CN200310102348 A CN 200310102348A CN 1496730 A CN1496730 A CN 1496730A
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knee
angle
alpha
described back
promotes
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CN1271982C (en
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堀谷正男
长冈浩
井上晓
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Paramount Bed Co Ltd
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Paramount Bed Co Ltd
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Abstract

在由背部角度α和膝部角度β确定的(α，β)坐标系中，连接坐标点(0，0)和在背部提升操作中作为最后到达的点的坐标点(α0，β0)之间的图形由多个点确定，在该坐标点(0，0)处，每个背部底部和膝部底部是水平的，在坐标点(α0，β0)处，背部底部被提升，预先获得可提供较少滑动和较少压迫感觉的最佳图形，控制部分沿该最佳图形移动背部底部和膝部底部。这样在进行电动床的背部提升操作和背部下降操作的同时，可不考虑看护者或操作者的主观判断，防止受看护者滑动。由此可防止在受看护者的腹部和胸部区域施加压力，可缓解受看护者和看护者的负担。

Figure 200310102348

In the (α, β) coordinate system determined by the back angle α and the knee angle β, connect the coordinate point (0, 0) and the coordinate point (α 0 , β 0 ) which is the last point reached in the back lifting operation The figure between is determined by a plurality of points, at the coordinate point (0, 0), each back bottom and knee bottom are horizontal, at the coordinate point (α 0 , β 0 ), the back bottom is lifted, The control section moves the bottom of the back and the bottom of the knees along that optimal pattern up front that provides less slippage and a less compressive feel. In this way, while the back lifting operation and the back lowering operation of the electric bed are performed, the subjective judgment of the caregiver or the operator can be ignored, and the care receiver can be prevented from sliding. This prevents pressure from being applied to the abdomen and chest area of the care receiver, and relieves the burden on the care receiver and the caregiver.

Figure 200310102348

Description

Electric bed and control device and control method thereof
Technical field
The present invention relates to the electric bed in a kind of nursing bed etc., it can be by the back of electric power lift bed, relate in particular to a kind of be suitable for promoting the back and need not mobile recumbency be subjected to the caregiver, electric bed as patient, perhaps be suitable at the electric bed that exerted pressure by the caregiver on one's body, also relate in particular to the control device of a kind of control method and this electric bed.
Background technology
In the senescence society that bed patient's number increases, owing to many reasons need the upper body of patient on the erect sick bed,, have a meal as medical examination, see TV and reading.Occurred a kind of electric bed thus, this can promote the bottom, back of sick bed and knee bottom up and down by electric power.But the back of this electric bed promotes or the health of back decline meeting removing patient or exert pressure on one's body patient.Can cause between muscle that moves and skin, producing skew like this.Thereby the minute blood vessel from muscle to skin is elongated, is easy to cause the obstruction of blood vessel or blood circulation to interrupt like this, also can injured skin.Can increase the weight of caregiver or care-giver's burden like this, the position has been moved in the operation that operation that patient promotes owing to the back or back descend, because patient self can not move, the caregiver must return the home position with patient's health.
In addition, when the ambulatory patient on the sick bed when sick bed moves on the wheelchair, the upper body that promotes patient on the sick bed can the easier sitting posture that keeps on one's sick bed for patient, is convenient to thus patient is moved on the wheelchair.In this case, also need non-migration patient body or when promoting patient's upper body, on health, do not exert pressure.
In order to address this problem the control method of also designing a kind of back/knee lock motion, and design a kind of electric bed, this electric bed can guarantee to be easier to promote the back and to promote knee actuator current amplifier, promote the lifting operation of operation and knee by the timing electric start, perhaps prevent angle between bottom bottom, back and the knee unnecessary narrow (as patent documentation 1: Japanese publication 2001-37820 number disclosed).
Known prior art can control independently that the back promotes operation and knee promotes in the operation in the public, and this back promotes operation and the knee lifting is operated and can be implemented respectively.Be operator (caregiver) with beginning and stop the back and promote, and beginning and stop knee and promote and operate.In order to prevent that patient from sliding owing to the back promotes, need promote the bottom, back again bottom upwards promoting knee after 20-30 °.When prior art can reach initial purpose, if when being operated by the caregiver, this operation was subjective operation, thereby can avoid fully that patient body glides when promoting patient's back.But in back lifting operation and back step-down operation, can not avoid patient to have the sensation of pressurized fully.
Summary of the invention
In addition, an object of the present invention is to provide a kind of electric bed, when this electric bed descends (back step-down operation) bottom the bottom, back promotes (back promotes operation) and back, when carrying out back lifting operation and back step-down operation, do not consider because operator or caregiver's subjective judgment can prevent from slided on one's sick bed by the caregiver.And can prevent to exert pressure, can alleviate the burden that is subjected to caregiver and caregiver like this at abdominal part that is subjected to the caregiver and chest region.The present invention also provides the control method of a kind of control device and electric bed.
Electric bed of the present invention comprises the bottom, back; The knee bottom; First drive part is used to fluctuate bottom the back; Second drive part is used to fluctuate bottom the knee; The control section of may command first drive part and second drive part, the back angle [alpha] is that the bottom, back is that the knee bottom can change with predefined figure from the angle that level upwards promotes from angle and the knee angle β that level upwards promotes thus, and this control section has storage area with storing coordinate point (0,0) and coordinate points (α 0, β 0) between figure connect, locate in this coordinate points (0,0), be level bottom each bottom, back and the knee, at coordinate points (α 0, β 0) locate, back bottom upwards rise to by a plurality of points determine (α, β) in the coordinate system, this control section also has operation part, to control first drive part and second drive part, makes back angle [alpha] and the knee angle β can be with graphic change.
The present invention includes the bottom, back; The knee bottom; First drive part is used to fluctuate bottom the back; Second drive part be used to the to fluctuate control method of electric bed of knee bottom is included in the control section foresee steps, at coordinate points (0,0) and coordinate points (α 0, β 0) between carry out figure and connect, locate in this coordinate points (0,0), be level bottom each bottom, back and the knee, at coordinate points (α 0, β 0) locate, the bottom, back upwards rises to (the α that is determined by a plurality of points, β) in the coordinate system, (α, β) coordinate system is that the bottom, back is that the knee bottom is determined from the angle that level upwards promotes from angle and the knee angle β that level upwards promotes by the back angle [alpha], and with default graphic change; This method also comprises and drives first drive part and second drive part, makes back angle [alpha] and the knee angle β can be with graphic change.
Control device of the present invention is used to control electric bed, and this electric bed comprises the bottom, back; The knee bottom; First drive part is used to fluctuate bottom the back; Second drive part is used to fluctuate bottom the knee.This control device comprises that storage area is with store storage coordinate (0,0) and coordinate points (α 0, β 0) between figure connect, locate in this coordinate points (0,0), be level bottom each bottom, back and the knee, at coordinate points (α 0, β 0) locate, the bottom, back upwards rises to (the α that is determined by a plurality of points, β) in the coordinate system, (α, β) coordinate system is that the bottom, back is that the knee bottom is determined from the angle that level upwards promotes from angle and the knee angle β that level upwards promotes by the back angle [alpha], and with default graphic change; This control device also comprises operation part, to control first drive part and second drive part, makes back angle [alpha] and the knee angle β can be with graphic change.
Another electric bed of the present invention comprises: the bottom, back; The knee bottom; First drive part is used to fluctuate bottom the back; Second drive part is used to fluctuate bottom the knee; The control section of may command first drive part and second drive part, making the back angle [alpha] is that the bottom, back is that the knee bottom can change with predefined figure from the angle that level upwards promotes from angle and the knee angle β that level upwards promotes, and this control section has storage area, as a reference, by extracting coordinate points (0,0) and coordinate points (α 0, β 0) between figure connect, and store the bottom, back in each zone and the operation figure of knee bottom, will (α, β) coordinate system is divided into a plurality of zones, locate in this coordinate points (0,0), be level bottom each bottom, back and the knee, at coordinate points (α 0, β 0) locate, back bottom upwards rise to by a plurality of points determine (α is β) in the coordinate system.This control section also has operation part, in a zone bottom, back and knee bottom is set therein with definite, and controls first drive part and second drive part on the basis of the regional operation figure of determine.
Of the present invention another comprises the bottom, back; The knee bottom; First drive part is used to fluctuate bottom the back; Second drive part be used to the to fluctuate control method of electric bed of knee bottom is by extracting coordinate points (0,0) and coordinate points (α 0, β 0) between figure connect, will (α, β) coordinate system is divided into a plurality of zones, as a reference, locate in this coordinate points (0,0), be level bottom each bottom, back and the knee, at coordinate points (α 0, β 0) locate, the bottom, back upwards rises to (the α that is determined by a plurality of points, β) in the coordinate system, (α, β) coordinate system is that the bottom, back is that the knee bottom is determined from the angle that level upwards promotes from angle and the knee angle β that level upwards promotes by the back angle [alpha], and with default graphic change; This method also is included in the operation figure of in the control section each zone being preset bottom, back and knee bottom; Determine in a zone bottom, back and knee bottom to be set therein; Control first drive part and second drive part on the basis of the regional operation figure of determine.
Another control device of the present invention is used to control electric bed, and this electric bed comprises the bottom, back; The knee bottom; First drive part is used to fluctuate bottom the back; Second drive part is used to fluctuate bottom the knee.This control device comprises storage area, by extracting coordinate points (0,0) and coordinate points (α 0, β 0) between figure connect, will (α, β) coordinate system is divided into a plurality of zones, as a reference, locate in this coordinate points (0,0), be level bottom each bottom, back and the knee, at coordinate points (α 0, β 0) locate, the bottom, back upwards rises to (the α that is determined by a plurality of points, β) in the coordinate system, (α, β) coordinate system is that back bottom is that the knee bottom is determined from the angle that level upwards promotes from angle and the knee angle β that level upwards promotes by the back angle [alpha], and in control section to the operation figure bottom bottom, default back, each zone and the knee; Determine in a zone bottom, back and knee bottom to be set therein; Control first drive part and second drive part on the basis of the regional operation figure of determine.
Description of drawings
Fig. 1 is the perspective view that shows the electric bed of one embodiment of the invention;
Fig. 2 shows electric bed back bottom, knee bottom and foot bottom and the front view of bending section between these bottoms;
Fig. 3 is the front view of bottom and bending section;
Fig. 4 is the front view of back lift unit when the bottom, back is horizontal;
Fig. 5 is the front view of back lift unit when the bottom, back promotes;
Fig. 6 is the front view of knee lift unit when the knee bottom is horizontal;
Fig. 7 is the front view of knee lift unit when the knee bottom promotes;
Fig. 8 is for showing when coordinate points (α, the perspective view of electric bed operation when β) being (0,0);
Fig. 9 is for showing when coordinate points (α, the perspective view of electric bed operation when β) being (0,25);
Figure 10 is for showing when coordinate points (α, the perspective view of electric bed operation when β) being (40,25);
Figure 11 is for showing when coordinate points (α, the perspective view of electric bed operation when β) being (47,15);
Figure 12 is for showing when coordinate points (α, the perspective view of electric bed operation when β) being (60,15);
Figure 13 is for showing when coordinate points (α, the perspective view of electric bed operation when β) being (75,0);
Figure 14 is for showing when coordinate points (α, the perspective view of electric bed operation when β) being (64,10);
Figure 15 is for showing when coordinate points (α, the perspective view of electric bed operation when β) being (50,10);
Figure 16 is for showing when coordinate points (α, the perspective view of electric bed operation when β) being (40,25);
Figure 17 is for showing when coordinate points (α, the perspective view of electric bed operation when β) being (19,25);
Figure 18 is for showing when coordinate points (α, the perspective view of electric bed operation when β) being (0,10);
Figure 19 is the block diagram that shows the control device of one embodiment of the invention;
Figure 20 shows the image that the back promotes figure;
Figure 21 is the image that shows back decline figure;
Figure 22 is the flow chart of control section;
Figure 23 is for promoting the image of operating figure when operating when carrying out the back; And
Figure 24 is the image of operation figure when carrying out the back step-down operation.
The specific embodiment
The preferred embodiments of the present invention are described with reference to the accompanying drawings.
Fig. 1 is the perspective view that shows the electric bed of one embodiment of the invention; Fig. 2 shows electric bed back bottom, knee bottom and foot bottom and the front view of bending section between these bottoms; Fig. 3 is the front view of bottom and bending section; Fig. 4 is the front view of back lift unit when the bottom, back is horizontal; Fig. 5 is for when the front view that reaches back lift unit when not only promoting; Fig. 6 is the front view of knee lift unit when the knee bottom is horizontal; Fig. 7 is the front view of knee lift unit when the knee bottom promotes; Fig. 8 is the perspective view that shows the electric bed operation to Figure 18.
To shown in Figure 3, the electric bed 1 of present embodiment has bottom, back 2, flexes portion 3, waist bottom 4, knee bottom 5, knee bend portion 6 and foot bottom 7 as Fig. 1, and these parts are coupled to each other together according to the label order.Back bottom 2 and waist bottom 4 interconnect by flexible flexes portion 3, and knee bottom 5 and knee bend portion 6 link together by same flexible knee bend portion 6.Waist bottom 4 is fixed.Bottom, back 2 rotation in this manner, promptly the end of its head one side promotes, and reverse rotation turns back to level, and swings round flexes portion 3.Knee bottom 5 rotation in this manner, promptly the terminal part in knee bend portion 6 one sides promotes, and reverse rotation turns back to level and swings around waist bottom 4.Flexes portion 3 and knee bend portion 6 all are designed to have a plurality of rod elements, and the discharging parallel to each other of these rod elements resembles reed screen, also has such rod element simultaneously, these elements are connected to each other in this manner, and in this mode, the slit between the rod element is transformable.Do as a wholely, flexes portion 3 and knee bend portion 6 all stretch and withdrawal in the closure of rod element, and in the closure of rod element steadily and crooked constantly.Control box 11 has button or switch, is used for instructing the back to promote operation and back step-down operation.In addition, control chamber 12 be positioned at foot bottom 7 below, this control chamber 12 accommodates control device, the operation of this device control electric bed 1 is input in the control chamber 12 from the command signal of control box 11.
The framework that is supporting the electric bed 1 of bottom 2, back and miscellaneous part moves up and down by the actuator (not shown) and can regulate the height of electric bed 1.
As shown in Figures 2 and 3, below back bottom 2, unit 20 that flexes portion 3, waist bottom 4, knee bottom 5, knee bend portion 6 and foot bottom 7 promote for the backs that bottom, back 2 is promoted and the knee joint lift unit 40 that makes the lifting of knee joint bottom.
As shown in Figure 4 and Figure 5, in back lift unit 20, the support bar 21 of pair of parallel extends at the length direction of electric bed 1, and this support bar 21 is fixed to the lower surface of bottom, back 2, to support bottom, back 2.Pair of parallel head rod 23 extends at the length direction of electric bed 1 equally, and this head rod 23 can rotate around fixed strong point F1.By motion strong point M1, the end of head rod 23 is connected on those parts that support bar 21 rests in waist bottom 4 one sides.Second connecting rod 24 rotates around fixed support point F2.By motion strong point M3, the end of second connecting rod 24 is connected on those parts than the support bar 21 of the more close waist of motion strong point M1 bottom 4.Protuberance 22 stretches out downwards, be arranged on the support bar 21 on the position of waist bottom side.The 3rd connecting rod 25 is connected on the end of protuberance 22 by motion strong point M2.The 3rd connecting rod 25 is connected on the piston rod 27 of the actuator 28 that makes the back lifting by motion strong point M4.In addition, the 4th connecting rod 26 is supported on the waist bottom 4 rotationally by fixed support point F3.The end of the 4th connecting rod 26 is connected on the motion strong point M4, and this strong point M4 is the junction point between the 3rd connecting rod 25 and the piston rod 27.The rear end of actuator 28 is supported on the fixed support point F6 rotationally, so that the stretching out of piston rod 27/retracted orientation is from the level varied slightly.
Shown in Fig. 6 and 7, in knee lift unit 40, support zone 41 is fixed on the lower surface of knee bottom 5, and support zone 42 is fixed on the lower surface of foot bottom 7.Knee bottom 5 and waist bottom 4 are rotatably connected to together by fixed support point F4.After waist bottom 4 was fixed, just swung by fixed support point knee bottom 5 knee bottom 5.Support zone 41 7 extends towards foot bottom, and support zone 42 extends support zone 41 close to each other towards knee bottom 5 and these parts of 42 link together by motion strong point M5 simultaneously, wherein motion strong point M5 be positioned at knee bend portion 6 below.When knee bottom 5 and knee bend portion 6 were in level, as shown in Figure 6, support zone 41 and 42 separated with knee bend portion 6.As shown in Figure 7, when knee bottom 5 promoted, support zone 41 and 42 was crooked in this manner, and in mode, support zone 41 and 42 top present arc, thereby support knee bend portion 6, equally also can be from following bending.The 5th connecting rod 43 is supported on the fixed support point F5 rotationally, and the end of foot bottom 7 is connected on the terminal part of the 5th connecting rod 43 by motion strong point M7 simultaneously.Part 44 at the support zone 41 of support zone 42 opposite sides is extended towards waist bottom 4, and the end of this part 44 is connected on the piston rod 46 of actuator 45 by motion strong point M6.The rear end of actuator 45 is supported on the fixed support point F7 rotationally, thereby makes the stretching out of piston rod 46/retracted orientation from the level varied slightly.
In this manual, " fixed support " is such position, and does not wherein move the position of the strong point, but immobilize, and the connecting rod that self is supported on rotationally simultaneously on the fixed support point can rotate with respect to this fixed support point.The fixed support point is fixed on the framework, and this frame supported back bottom 2 parts such as grade, thereby promotes or descend so that during the height change of bed, fixed support point is lifting or decline thereupon also when whole framework." the motion strong point " is meant such strong point, and when wherein this strong point rotated along with the connecting rod that links to each other, self also moved.
Actuator 28 and actuator 45 all have motor, and this motor is by rotating backward forward, continuous piston rod 27 or piston rod 46 are stretched out or withdraw.Actuator 28 and actuator 45 are controlled by the control device in control chamber 12 (not illustrating in Fig. 2).By means of serial communication system, by be input to the control device in the control chamber 12 by the signal that is pressed in the switch output on the control box 11.
Figure 19 is the block diagram of this control device 60.ON/OFF signal from the switch of control box 11 is input in the importation 61 of control device 60, is input to 63 then, converts the DC electric current of 24V and 5V to, and this electric current is applied on chopper circuit 64 and the control section 62 successively.This control section 62 sends to the control signal that drives each actuator on the chopper circuit 64.
Chopper circuit 64 receives the signal that has experienced pulse width modulation (PWM), and the control motor current.Respectively by relay 65,66 and 67, this chopper circuit 64 is provided to this control motor current the built-in motor 70 of the actuator 45 of actuator 28 built-in motors 69 of motor 68 in the actuator (not shown), back lift unit 20 and knee lift unit 40.The output of chopper circuit 64 also is input on the control section 62, thereby current signal feeds back to control section 62.Signal from control section 62 is input to relay 65,66 and 67, to control the ON/OFF action of this relay 65,66 and 67.From pick off 71 survey the detectable signal of the piston rod position (stretching out/retracted position) of bed liftings/decline actuators, survey from pick off 72 back lift units 20 actuator 28 piston rod 27 positions (stretching out/retracted position) detectable signal and be input in the control section 62 from the detectable signal of the piston rod position (stretching out/retracted position) of the actuator 45 of pick off 73 detection knee lift units 40.Pick off 71 to 73 is surveyed the position of associated piston bar, for example, utilize potentiometer to measure along with piston rod stretches out/withdraw the resistance that changes, and survey the motor amount of spin, perhaps motor speed is controlled to predetermined value, and motor speed be multiply by the operating time, thereby detect the position of piston rod.The pick off of surveying the motor rotation amount comprises: by from the photo measure corner of light emitting diode or the pick off of revolution, light wherein is by being fixed to that finedraw dish on the motion stops or by this dish; By the potentiometer that adopts Hall element to utilize magnetic to survey the pick off of revolution and measure the resistance that changes along with the motor rotation.In addition, the pick off of control motor speed comprises following pick off: control electric energy by the counter electromotive force power of surveying motor rotation generation, thereby motor is rotated with constant speed based on this power control electric energy, and by rotating speed being multiply by the pick off that the operating time obtains the motor revolution, and detection is connected to the pick off of the voltage that produces on the tachometer generator on the motor, this pick off is controlled electric energy in this manner, in this mode, make the pick off of motor, and obtain the motor revolution by rotating speed being multiply by the operating time with the constant speed rotation.
Control section 62 comprises 81 and operation part 82.In storage area 81, store the back promotes and the back descends reference pattern and operation figure.This graph data can store among ROM (read only memory) or the RAM (random access memory) in advance, thereby these data can be upgraded from the outside.
Figure 20 and 21 shows the control figure that the back promotes and descends that is used for that is stored in the storage area 81.The back angle [alpha] is bottom 2, back and horizontal direction angulation, and knee angle β is knee bottom 5 and horizontal direction angulation.The back angle [alpha] can calculate according to piston rod 27 geometric positions of actuator 28, and knee angle β calculates according to the geometric position of the piston rod 46 of actuator 45.Like this, the piston rod 27 of actuator 28 and actuator 45 and 46 positions relation and back angle [alpha] and knee angle β can obtain in advance by geometrical calculation, are arranged in the correction chart, and the data storage on correction chart is in storage area 81.So, based on from the piston rod 27 of the actuator 28 of respective sensor 72 and 73 and 45 and 46 position sensing result, operation part 82 reads back angle [alpha] and knee angle β from the correction chart that is stored in the storage area 81, obtains back angle [alpha] and knee angle β.Then, operation part 82 compares the figure shown in this back angle [alpha] and knee angle β and Figure 20 or Figure 21, and control signal outputed to relay 65,66 and 67, its mode is to make the back angle [alpha] of measurement and result and this figure coupling of knee angle β.
This control figure by since the coordinate system that back angle [alpha] and knee angle β determine (α β) expresses.That is to say, as shown in figure 20, for the lifting figure that bottom, back 2 is promoted, in an example, bottom 2, back and knee bottom 5 are that horizontal state is represented by coordinate points (0,0), and finally reach at 75 o'clock in the back angle [alpha] of bottom, back 2, this point that finally reaches is by coordinate points (75,0) represents four coordinate points (0,25), (40,25), (47,15) and (60,15) be arranged on coordinate points (0,0) and (75,0) between, this figure is defined as the straight line that connects these points simultaneously.On the other hand, for the decline figure that bottom, back 2 is descended, five coordinate points (64,10), (50,10), (40,25), (19,25) and (0,10) be arranged between these two states, promptly back bottom 2 as an example rises to 2 coordinate points that are horizontal (0 bottom 75 ° (knee bottom 5 is in 0 °) and the back, 0), this figure is defined as the straight line that connects these points.These backs promote figure and back decline figure obtains in advance, and its mode is to make the minimum pressure of sliding and being added to the patient, are optimum intersection figures for back lifting and back step-down operation simultaneously.
The operation of this structure electric bed 1 is described below.The operation of back lift unit 20 and knee lift unit 40 at first, is discussed.As shown in Figure 5, when driving back lift unit 20 and make piston rod 27 from level withdrawal shown in Figure 4, because fixed support point F1, F2 and F3 do not move, the 4th connecting rod 26 clockwise rotates, and the 3rd connecting rod 25 clockwise rotates the protuberance 22 of the support bar 21 of bottom, back 2 simultaneously.When the head rod 23 that is supported on fixing point F1 and F2 rotationally and second connecting rod 24 respectively when motion strong point M1 and M3 are connected to support bar 21, the associated movement of longer head rod 23 and short second connecting rod 24 can make bottom, back 2 upwards rotate around two some M1 and M3.When the driving by actuator 28 makes piston rod 27 travel forward (trying and punishing), thereby the 3rd connecting rod 25 promotes the protuberance 22 of support bar 21, and support bar 21 and back bottom 2 is clockwise rotated around these two points.Erect as Fig. 5 bottom 2, back, and by flexes portion 3 (not illustrating in Fig. 5), the part between bottom 2, back and the fixed waist bottom 4 is crooked steadily crooked.
On the other hand, when the piston rod 27 of actuator 28 is withdrawn, the 3rd connecting rod 25 pulling protuberances 22, thus support bar 21 and bottom, back 2 turn back to level.As a result, bottom, back 2, flexes portion 3 and waist bottom 4 levels that turn back to as shown in the figure.
In knee lift unit 40, as shown in Figure 6, piston rod 46 withdrawals of actuator 45, knee bottom 5, knee bend portion 6 and foot bottom 7 are horizontal simultaneously.When the piston rod 46 of actuator 45 was withdrawn, as shown in Figure 7, knee bottom 5 and knee bend portion 6 rotated counterclockwise around fixed support point F4.Therefore, knee bottom 5 promotes.In this case, knee bottom 5 is connected on the foot bottom 7 by support zone 41 and 42, and foot bottom 7 is connected with the 5th connecting rod 43 that is connected to strong point F5.So when knee bottom 5 raise, support zone 42 promoted, thereby the foot bottom 7 that the rear portion is connected on the 5th connecting rod 43 moves up, and is supported on rotationally on motion strong point M5 and the M7 simultaneously.At this moment, knee bend portion 6 is connected between knee bottom 5 and the foot bottom 7, and the bottom of knee bend portion 6 is by support zone 41 and 42 supports simultaneously, thereby knee bend portion 6 is crooked reposefully along the top edge envelope of support zone 41 and 42.
This back promotes operation and step-down operation has progress in interlocking and synchronization aspects, and bottom 2, back and knee bottom 5 are with the motion of figure shown in Fig. 8 to 18 (foot bottom 7 is too in 5 back, knee bottom) simultaneously.
Back lift unit 20 and knee lift unit 40 be the operation of interlocking ground in this manner, and in this mode, back angle [alpha] and knee angle β are along graphic change shown in Figure 20 and the support bar 21.Figure 22 is the operational flowchart of control section 62 among Figure 19.
When instruction starts signal that the back promotes operation (promote and handle) when control box 11 is input to control section 62, the step S1 in Figure 22 is judged to be "Yes", thereby the operation part 82 of control section 62 is selected the lifting figure from storage area 81.Then, operation part 82 is utilized the correction chart that is stored in the storage area 81 based on from pick off 72 and 73 and be input to the detectable signal of control section 62, reads and obtain the back angle [alpha] and the knee angle β of bottom, back 2.
Then, operation part 82 compares current back angle [alpha] and the lifting figure among knee angle β and Figure 20, judges the operation requests (step S3) for each actuator 28 and 47.This operation requests is " stopping request ", " the lifting operation requests " or " step-down operation request " of bottom 2, back or knee bottom 5.
Operation part 82 compares the measured value of back angle [alpha] knee angle β and lifting figure.When the back angle [alpha] is mated with angle shown in the lifting figure, operation part 82 " stops request " for 2 outputs of bottom, back, simultaneously when the back angle [alpha] than promoting the angle shown in the figure hour, be 2 outputs " lifting operation requests " of bottom, back, and when the back angle [alpha] is bigger than the angle shown in the lifting figure, be 2 outputs " step-down operation request " of bottom, back.For knee bottom 5 also is like this.When knee angle β mates with angle shown in the lifting figure, operation part 82 " stops request " for 5 outputs of knee bottom, simultaneously when knee angle β than promoting the angle shown in the figure hour, be 5 outputs " lifting operation requests " of knee bottom, and when knee angle β is bigger than the angle shown in the lifting figure, be 5 outputs " step-down operation request " of knee bottom.
When the enabling signal indication beginning back of transmitting from control box 11 promoted operation (back manipulation), the step S1 in Figure 22 was judged to be "No", thereby flow process enters into step S2.In this step S2, owing to have the enabling signal that the instruction back promotes operation, therefore be judged to be "Yes", operation part 82 selects to promote figure from storage area 81 simultaneously.This operation part 82 has obtained back angle [alpha] and knee angle β in the mode identical with former case, and the decline figure in back angle [alpha] and knee angle α and the support bar 21 compared, judge the operation requests (step S4) of each actuator 28 and 47 simultaneously.This operation requests is " stopping request ", " the lifting operation requests " or " step-down operation request " of bottom 2, back or knee bottom 5.
Operation part 82 compares measured value and the decline figure of back angle [alpha] knee angle β.When angle shown in back angle [alpha] and the decline figure is mated, operation part 82 " stops request " for 2 outputs of bottom, back, simultaneously when the back angle [alpha] than the angle shown in the decline figure hour, be 2 outputs " lifting operation requests " of bottom, back, and when the back angle [alpha] is bigger than the angle shown in the decline figure, be 2 outputs " step-down operation request " of bottom, back.For knee bottom 5 also is like this.When angle shown in knee angle β and the decline figure is mated, operation part 82 " stops request " for 5 outputs of knee bottom, simultaneously when knee angle β than the angle shown in the decline figure hour, be 5 outputs " lifting operation requests " of knee bottom, and when knee angle β is bigger than the angle shown in the decline figure, be 5 outputs " step-down operation request " of knee bottom.
When neither starting back lifting operation from the signal indicating that control box 11 is input to the control section 62 by importation 61, when also not starting the back step-down operation, operation part 82 judges that the operation requests of bottom 2, back and knee bottom 5 is " stopping request " (step S5).
In the step S6 in Figure 22, when the operation requests of bottom, back 2 was " stopping request ", operation part 82 was sent control signal to the relay 66 of bottom, back 2, so that motor 69 stops (step S8).When the operation requests when bottom, back 2 is not " stopping request ", operation part 82 determines in step S7 whether the operation requests of bottom, back 2 is " lifting operation requests ", and control signal sent to relay 66, with under " lifting operation requests " ("Yes") situation, make motor 69 on the direction that increases bottom, back 2 back angle [alpha], rotate (step S9).Under the situation that is " step-down operation request " ("No"), operation part 82 is exported to relay 66 to control signal, so that motor 69 rotates (step S10) on the direction of the back angle [alpha] that reduces bottom, back 2.
In the step S11 in Figure 22, during for " stopping request ", operation part 82 is sent control signal to the relay 67 of the actuator of knee bottom 5, makes built-in motor 70 stop (step S13) for the operation requests of knee bottom 5.When the operation requests of knee bottom 5 is not " shut-down operation ", operation part 82 determines whether the operation requests of knee bottom 5 in step S12 is " lifting operation requests ", and control signal sent to relay 67, with under " lifting operation requests " ("Yes") situation, make built-in motor 70 on the direction of the knee angle β that increases knee bottom 5, rotate (step S14).Under the situation that is " step-down operation request " ("No"), operation part 82 is exported to relay 67 to control signal, so that built-in motor 70 rotates (step S15) on the direction of the knee angle β that reduces knee bottom 5.
Then, when flow process turned back to step S1 once more and repeats with sufficient distance, bottom 2, back and knee bottom 5 promoted or descend along Figure 20 or figure shown in Figure 21.Because behind step S15, flow process turns back to step S1 and S2, to determine that the back promotes switch and opens or close, definite simultaneously back decline switch opens or cuts out, all the time open so long as promote switch, operation just takes place to promote, and as long as the decline switch is opened all the time, step-down operation just takes place.When promoting switch or decline switch and close, in step S5, operation requests is always " stopping ", and all operations stops simultaneously.Therefore, in order to promote operation continuously, if switch is a button-type, the operator compresses switch under should keeping under normal conditions.Switch to open mode simultaneously when promoting switch and decline switch, operation stops usually.In the flow chart in Figure 22 these are not shown.The safety of configuration switch action raising the in the above described manner.
Though the signal that instruction lifting operation (promote and handle) starts is input to the control section 62 of control device 60 from control box 11 with the signal that instruction step-down operation (descend and handle) starts, yet also can realize: promptly by following, by on control box 11, button-type switch (first switch) being provided specially and providing button-type switch (second switch) specially for starting step-down operation for starting to promote to operate, perhaps by such switch is set, this switch is when the center of being set in and be set in the right or during left position, select the centre position, promote operation and step-down operation.
In the present embodiment, back bottom 2 all can calculate according to the geometry of position of the piston rod 46 of the position of the piston rod 27 of actuator 28 and actuator 45 with respect to the knee angle β of horizontal direction with respect to the back angle [alpha] of horizontal direction and knee bottom 5, piston rod 27 and 46 and back angle [alpha] and knee angle β between position relation can express with the form of correction chart in advance, data storage in this correction chart is in storage area 81, to the result of detection of the position of the piston rod 27 of actuator 28 and 46 from corresponding pick off 72 and 73, based on this result, read back angle [alpha] and knee angle β in the correction chart of operation part 82 from be stored in storage area 81, thereby obtain this two angles.Figure (being stored in the storage area 81) shown in back angle [alpha] and knee angle β and Figure 20 or Figure 21 is compared, and the driving of bottom 2, control back and knee bottom 5, by such manner, the measurement result of back angle [alpha] and knee angle β is just mated with figure.
Yet, the driving control of bottom 2, back and knee bottom 5 is not limited to this method, but can controls the driving of bottom 2, back and knee bottom 5 by direct control actuator based on the result of detection of piston rod position.Specifically, when the back angle [alpha] for example is 0 ° in Figure 20,40 °, 47 °, when 60 ° and 75 °, can obtain driving the position (being defined as " a ") of piston rod 27 of the actuator 28 of bottom, back 2 by geometrical calculation in advance, for example be 0 ° in Figure 20 and work as knee angle β, 25 °, when 15 ° and 0 °, can obtain driving the position (being defined as " b ") of piston rod 46 of the actuator 45 of knee bottom 5 by geometrical calculation in advance, at (a, b) optimum intersection figure in the coordinate figure can be stored in the storage area 81, simultaneously when the position of detecting piston rod 27 and 46 by pick off 72 and 73, and by the position of the piston rod 27 that detects and 46 and (a, b) after coordinate figure carries out directly comparing, actuator can be driven by this way, be that the position of independent piston rod 27 and 46 arrives by (a, b) position represented of coordinate figure.At this moment, the graphics memory of (a, b) coordinate figure of piston rod position substitutes (α, β) figure that are limited by back angle [alpha] and knee angle β among Figure 20 and Figure 21 in storage area 81.
Alternatively, when 2 rotations of back bottom the end side position height of this bottom, back 2 and when 5 rotations of knee bottom bottom this knee the height of 5 end side (end portion of knee bend portion 6 sides) position can detect by similar devices such as photoelectric sensor or sonacs, according to this height, along the driving of bottom 2, the control of the figure shown in Figure 20 and 21 back and knee bottom 5.Equally in this case, according to back angle [alpha] and knee angle β, can put upside down height and position, can control the driving of bottom 2, back and knee bottom 5 simultaneously by this way, in this mode, back angle [alpha] and knee angle β are along the graphic change shown in Figure 20 and 21.Can prepare the optimum intersection figure that has as the height and position of bottom 2, the back of coordinate points and knee bottom 5, can control the driving of bottom 2, back and knee bottom 5 by these optimum intersection figures and result of detection to height and position are directly compared simultaneously.
Bottom 2, back and knee bottom 5 promote operation or step-down operation along this figure figure is described below.Fig. 8 shows the variation of bed when the back promotes operation to Figure 13.Fig. 8 to 13 only shows bottom, back 2, waist bottom 4, knee bottom 5 and foot bottom 7, and the miscellaneous part as knee bend portion is not shown.In the coordinate points (0,0) of Figure 20, as shown in Figure 8, bed is in level.Then, bed changes to coordinate points (0,25) from coordinate points (0,0).Thereby as shown in Figure 9, knee bottom 5 promotes, and bottom, back 2 remains unchanged.Then, bed changes to coordinate points (40,25) from coordinate points (0,25).As a result, as shown in figure 10, the back angle [alpha] is increased to 40 °, and knee angle β keeps constant 25 °.Afterwards, bed changes to coordinate points (47,15) from coordinate points (40,25).That is to say that when the back angle [alpha] increased, knee angle β reduced.As a result, as shown in figure 11, back bottom 2 and knee bottom 5 state that mediates.
Then, bed changes to coordinate points (60,15) from coordinate points (47,15).That is to say that the back angle [alpha] increases once more, and knee angle β maintenance is constant.As a result, bed arrives state shown in Figure 12.
Afterwards, bed changes to coordinate points (70,0) from coordinate points (60,15).That is to say that as shown in figure 13, knee angle β reduces, and the back angle [alpha] is increased to final objective coordinate points (75,0) once more.
Back bottom 2 changes along the figure from level shown in Figure 8 to state shown in Figure 13, and wherein bottom, back 2 promotes 75 °.
In the step-down operation of bottom, back 2, the shape of bed changes with the figure of Figure 13 to 18.That is to say that bed changes to coordinate points (64,10) from coordinate points shown in Figure 21 (75,0).
Thereby knee bottom 5 promotes, and bottom, back 2 descends.
Then, this bed changes to coordinate points (50,10) from coordinate points (64,10).As shown in figure 15, thereby have only bottom, back 2 to descend, and the invariant position of knee bottom 5.
Then, this bed changes to coordinate points (40,25) from coordinate points (50,10).As a result, as shown in figure 16, have only bottom, back 2 to descend once more, and knee bottom 5 promote.
Subsequently, this bed changes to coordinate points (19,25) from coordinate points (40,25).As a result, as shown in figure 17, have only bottom, back 2 to descend once more, and the invariant position of knee bottom 5.
Then, this bed changes to coordinate points (0,10) from coordinate points (19,25).Thereby knee bottom 5 drops to 10 ° knee angle β, and bottom, back 2 turns back to level.
Then, this bed changes to coordinate points (0,0) from coordinate points (0,10).Make bed turn back to level shown in Figure 8 like this.
According to present embodiment, only press down lifting starting switch or decline starting switch once, just make bottom 2, back and knee bottom 5 according to the optimum intersection figure motion that obtains in advance, in this way, the motion of the motion of bottom, back 2 and knee bottom 5 is connected, and avoid the health slip and have pressure to act on the health.Nursing staff's (operator) subjective judgment does not have influence in the motion of bed.Therefore, this moves according to the optimum intersection figure that obtains in advance all the time, even and no matter how how or as the nursing staff nursing staff's subjective judgment change, thereby the patient who lies on a bed promotes in operation or the back step-down operation at the back and guarantees not slide in bed.In the operation that the upper body of setting the patient is upwards operated and the patient is put down, there is not pressure to be applied on one's body the patient.In addition, the patient can not have between muscle and skin yet and departs from, simultaneously can be owing to the disturbance of blood circulation that stretch and produce to the blood capillary that from muscle to skin, extends yet, and this circulatory disturbance can be damaged skin.Owing to be provided with fixed waist bottom 4 in the present embodiment, thereby when carrying out back lifting operation and back step-down operation, patient's waist is very steady.
Because promote in operation and the back step-down operation at the back, the slip that does not produce the patient does not perhaps have pressure and acts on one's body the patient, therefore recommend Figure 20 and figure shown in Figure 21.
In back figure shown in Figure 20, (α is β) earlier from (0,0) reason that changes to (0,25) is, when promoting the operation beginning at the back (0 ° to 10 ° back angle), the slip of health is bigger, before the back is promoted, suppresses to slide by promoting knee.In the process of from (0,25) to (40,25) motion, the back promotes, and sliding simultaneously is suppressed, and is forming certain angle between bottom 2, back and knee bottom 5, thereby the patient can not feel pressure and applies.In from (40,25) to the motor process of (47,15), when the back angle [alpha] became 40 °, erect significantly bottom, back 2, and the patient begins to feel pressure and is applied on the health.Aspect this, when the back angle [alpha] increased again, knee descended, thereby pressure is not applied on the patient body.At this moment, the angles of being determined by back bottom 2 and knee bottom 5 can significant change, thereby the patient can not slide in bed.
In from (47,15) to the motor process of (60,15), knee angle β is constant, and the back angle [alpha] becomes big separately simultaneously, thereby slight pressure increases.Arrive in the motor process of (75,0) from (60,15) ensuing, the back promotes and arrives the final point of arrival, and knee descends simultaneously.The knee applied pressure in the process of to alleviate in front that set to descend.In the present embodiment, it is very important making back angle [alpha] and knee angle β reach the final point of arrival (75,0) simultaneously, and when the back angle [alpha] continued to increase, knee angle can not be 0 at least.When the back promotes and knee descends and finishes simultaneously or knee descends at least and to promote at the back when finishing after finishing, pressure can not keep, level of comfort raising after the back promotes operation or back step-down operation simultaneously.Therefore, be necessary in from (40,25) to (47,15) motor process, knee to be descended, be necessary simultaneously from (47 to suppress to be added in pressure on the health, 15) in (60,15) motor process, the back is promoted, because from (60,15) in the motor process of (75,0), back and knee should move to the final point of arrival simultaneously.
Though the final point of arrival is set at (75,0), preferably, when the patient was sitting in bedside edge (sitting down at the edge) and transfers on the wheelchair, knee angle β should be 0 °.Increase the chance that the patient moves by this way on the wheelchair thereby the patient is transferred to easily inside and outside the room, so just improved patient's QOL (quality of life).
For perpendicular in bed patient's upper body, be added in body pressure on back and the abdominal part with minimizing, preferably when knee angle β reduces near 10 °, stop the back and promote and operate.In such angle, the patient can take comfortable position.Equally in this case, the patient is erected to the back (75,0) and locates, to guarantee that patient's center of gravity is changed to lower body from buttocks.
In decline figure in back shown in Figure 21, in from (75,0) to the motor process of (64,0), descending simultaneously at the back, knee promotes.In the starting stage of back step-down operation (75 ° to 60 °), weight concentrates on buttocks to the zone between the lower body, thereby even the back reduces, health also tends to stop at foot one side, has so just increased the slip of health.Promote knee simultaneously by reducing at the back, weight shifts towards the upper body, slides to suppress health.Owing in the process of from (64,10) to (50,10) motion, continue weight is shifted too much towards the upper body, thereby the patient will feel to be applied to the pressure on the waist to the lifting of knee.Like this, stop to promote knee, to increase the angle between bottom 2, back and the knee bottom 5.
In addition, in the process of from (50,10) to (40,25) motion, increase to the patient in the angle of back bottom 2 and knee bottom 5 and do not feel pressure after the degree that applies, knee further promotes, weight is transferred to fully bottom, back 2.Then, in from (40,25) to the motor process of (19,25), the back reduces, and knee angle β keeps constant simultaneously.Because knee angle β reaches maximum in this process,, health is slided so the back reduces.Yet, it should be noted that weight is displaced to lower body once more if knee reduces too much in this process, health is slided, thereby knee angle β should set steady state value.
Ensuing from (19,25) in the motor process of (0,10), the back angle [alpha] reduces to 25 °, thus when even knee reduces, health does not draw towards knee yet.Therefore, when the back reduces, just begin to reduce knee.In from (0,10) to the last process of (0,0), health lies down fully, and knee turns back to level simultaneously.
In the present embodiment, the back angle [alpha] is 75 °, and knee angle β is 0 °.According to the purpose of optimum intersection figure, β 0Be not set at 0 °, and can for example be set at about 10 °, in this angle, knee promotes slightly.In the present embodiment, constituting the coordinate points that promotes figure is (0,0), (0,25), (40,25), (47,15), (60,15) and (75,0), the coordinate points that constitutes the decline figure is (75,0), (64,10), (50,10), (40,25), (19,25), (0,10) and (0,0).Yet,, can obtain same advantage if it is different slightly with those values to constitute the angle of optimum intersection figure.That is to say, if each angle in coordinate points all drop on ± 3 ° difference range in, then the back promotes operation and the back step-down operation can be carried out under optimum condition.Like this, constitute the coordinate points that promotes figure and become (0,0), (0,25 ± 3), (40 ± 3,25 ± 3), (47 ± 3,15 ± 3), (60 ± 3,15 ± 3) and (75 ± 3,0), the coordinate points that constitutes the decline figure is (75 ± 3,0), (64 ± 3,0), (50 ± 3,10 ± 3), (40 ± 3,25 ± 3), (19 ± 3,25 ± 3), (0,10 ± 3) and (0,0).
As mentioned above, the optimum intersection figure that the back promotes operation and back step-down operation can obtain and store in the storage area 81 of importation 61, can operate bottom 2, back and knee bottom 5 according to this figure simultaneously, thereby only simply the started by press switch once (continue push switch) moved along optimum intersection figure all the time in bottom 2, back and knee bottom 5, and have nothing to do with the operator.As previously described, this optimum intersection figure can store among the ROM, and can be set in the storage area 81, perhaps stores among the RAM.
Along with the difference of bed structure, the variation of condition or the variation of purposes, the optimum intersection figure that obtains down can upgrade as required specifically imposing a condition.For example, Figure 20 and figure shown in Figure 21 preferably are used in Fig. 1 in bed structure shown in Figure 180.That is to say, in the situation of electric bed with bottom, back 2, flexes portion 3, waist bottom 4, knee bottom 5, knee bend portion 6 and foot bottom 7, Figure 20 and figure shown in Figure 21 preferably avoid health to slide, and avoid pressure to be applied on the patient body.Yet, the present invention also is suitable in other various types of electric beds, these for example are the electric bed that does not have flexes portion and knee bend portion, the electric bed that does not have waist or vola portion, the electric bed that perhaps has the bottom, second back between bottom, first back and waist bottom or knee bottom, when wherein this electric bed can be erect in first back bottom, respond the motion of bottom, first back and make bottom, second back with the equidirectional rotation of bottom, first back.In these examples, avoid health to slide and to have pressure to be applied to patient's optimum intersection figure on one's body different with Figure 20 and shown in Figure 21 those usually, this optimum intersection figure can obtain according to each bed structure simultaneously.
In those examples, when adopting ROM,, can be set in new figure in the storage area 81 by with the new ROM that replaces, when adopting RAM,, can be set in new figure in the storage area 81 simultaneously by data externally are written in the RAM.
According to the present invention, as mentioned above, when erect and when the bottom, back descends back bottom, can move along optimum intersection figure all the time bottom bottom, back and the knee, and regardless of nursing staff or operator's subjective judgment how.Carrying out the back when promoting operation and back step-down operation, this reliability has stoped by the nursing staff slides, and regardless of nursing staff or operator's subjective judgment how.Therefore, just can stop pressure to be applied to, thereby alleviate by nursing staff and nursing staff's burden by on nursing staff's abdominal part and the chest.
The second embodiment of the present invention is discussed below.Second embodiment is identical with first embodiment on the structure of electric bed, and is just different with first embodiment aspect the control figure of control section 62.
Second embodiment situation below is effective.Promptly can be or the bottom, state back of having erect, the knee bottom situation that promotes or descend from back bottom, rather than back bottom all is in the situation that the states of the horizontal level of Figure 23 and Figure 24 promote or descend according to Figure 20 or figure shown in Figure 21, from bottom, back and knee bottom 5, and wherein Figure 23 and Figure 24 show respectively when bottom, back and knee bottom and all the back promoted and the operation figure of decline along the figure of Figure 20 and Figure 21 when the figure that illustrates departs from.
Promote in the figure of operation at back shown in Figure 23, (α, β) coordinate system is divided into four zones, and regional 1-4 as shown in figure 23, has determined the mobile graphics of bottom, back and knee bottom in each zone.When carrying out the back operation,, determine the mobile graphics of bottom, mobile back and knee bottom according to the zone at bottom, back (back angle [alpha]) and (knee angle β) place, knee bottom.Be depicted as the scope and the mobile graphics of individual region promptly.
(1) zone 1
Scope: 0≤α≤40,0≤β≤25
Figure: only knee angle β increases, and the back angle [alpha] is invariable
(2) zone 2
Scope: 40≤α≤60,0≤β≤15
Figure: only the back angle [alpha] increases, and knee angle β is invariable
(3) zone 3
Scope: 60≤α≤75,0≤β≤15 and 40≤α≤75,15≤β≤25
Figure: knee angle β reduces, and the back angle [alpha] increases
(4) zone 4
Scope: 25≤β
Figure: only knee angle β reduces, and the back angle [alpha] is invariable
Notice that the back angle [alpha] is equal to or greater than 75 ° situation and is not included in the present embodiment.
In the figure of back step-down operation shown in Figure 24, (α, β) coordinate system is divided into five zones, and regional 5-9 as shown in figure 24, has determined the mobile graphics of bottom, back and knee bottom in each zone.When carrying out the back step-down operation,, determine the mobile graphics of bottom, mobile back and knee bottom according to the zone at bottom, back (back angle [alpha]) and (knee angle β) place, knee bottom.Be depicted as the scope and the mobile graphics of individual region promptly.
(5) zone 5
Scope: 50≤α≤75,0≤β≤25 and 20≤α≤50,10≤β≤25
Figure: knee angle β increases, and the back angle [alpha] reduces
(6) zone 6
Scope: 20≤α≤50,0≤β≤10
Figure: knee angle β increases, and the back angle [alpha] is invariable
(7) zone 7
Scope: 0≤α≤20,0≤β≤10
Figure: the back angle [alpha] increases, and knee angle β is invariable
(8) zone 8
Scope: 0≤α≤20,10≤β≤25
Figure: the back angle [alpha] reduces, and knee angle β also reduces
(9) zone 9
Scope: 25≤β
Figure: knee angle β reduces, and the back angle [alpha] is invariable
Notice that the back angle [alpha] is equal to or greater than 75 ° situation and is not included in the present embodiment, and only the bottom, back descends in associative operation.
The operation of the electric bed that will discuss as above below to be constituted.Because the difference of second embodiment and first embodiment only is the control figure of control section 62, and second embodiment is identical in the operating aspect of back elevator system 20 and knee elevator system 40 with first embodiment, the description that will omit same operation below.In a second embodiment, back elevator system 20 and knee elevator system 40 are operated according to Figure 23 and figure interaction shown in Figure 24, and back angle [alpha] and knee angle β are with Figure 20 and graphic change shown in Figure 21 thus.The operation that FB(flow block) shows control section 62 in the present embodiment is equal to shown in Figure 22.
Under the situation of signal indication, the startup that the back promotes operation is input to control section 62 from control box 11, the judgement of step S1 is a "Yes" among Figure 22, and then the operation part 82 of control section 62 is selected lifting figure shown in Figure 20 and operation figure shown in Figure 23 from storage area 81.Subsequently, operation part 82 is utilized the relevant form that is stored in the storage area 81, according to what send from induction apparatus 72 and 73, is input to the index signal of control section 62, reads and choose the back angle [alpha] of bottom, back 2 and the knee angle β of knee bottom 5.
Subsequently, operation part 82 with current back angle [alpha] and knee angle β and operation figure advance ratio shown in Figure 23 is judged the operation requests (step S3) of each brake 28 and 47.This operation requests is " stopping request " of bottom 2, back or knee bottom 5, " lifting operation requests " or " step-down operation request ".
When constituting signal that the back promotes operation from control box 11 inputs, as shown in figure 23, be provided with bottom 2, back and knee bottom 5 or back angle [alpha] and knee angle β in zone 1, for example electric bed is the situation of level, only rising to midway (for example α=20) in the operation separately when bottom, back 2, the situation that operator promotes, only rising to midway (for example β=15) in the operation separately when knee bottom 5, the situation that operator promotes, perhaps back bottom 2 and knee bottom 5 are upwards risen to midway (α=20 for example when operator, β=15) time, only knee angle β increases, and angle [alpha] maintenance in back is constant.In addition, back angle [alpha] and knee angle β arrive the critical place in zone 1 and zone 4, change according to the relational graph shown in the chart cathetus subsequently.Be that operation part 82 hypothesis setting back angle [alpha] or knee angle β are constant, bottom 2, back or 5 outputs of knee bottom " are stopped request ", suppose to increase back angle [alpha] and knee angle β, then to bottom 2, back or 5 outputs " lifting operation requests " of knee bottom, suppose to reduce the back angle [alpha] or knee angle β is constant, then to bottom 2, back or 5 outputs " step-down operation request " of knee bottom.
In control box 11 inputs, in other regional 2-4 as shown in figure 23 back angle [alpha] and knee angle β are set at the signal that constitutes back lifting operation, its situation is also identical.When in zone 2 back angle [alpha] and knee angle β being set, only the back angle [alpha] increases, and keeps knee angle β constant.When back angle [alpha] and knee angle β moved to the zone 3 from zone 2, the back angle [alpha] increased, and knee angle β reduces, and the back will be discussed.The back angle [alpha] keeps increasing as a result, becomes 0 ° up to knee angle β.When in zone 3 back angle [alpha] and knee angle β being set, the back angle [alpha] increases, and knee angle β reduces.When back angle [alpha] and knee angle β arrived the critical place in zone 2 and 3, back angle [alpha] and knee angle β moved according to the indicated relational graph of Figure 23 cathetus.When operation from zone 3, and back angle [alpha] and knee angle β be not when arriving the critical place in zone 3 and zone 2, the back angle [alpha] increases, and knee angle β reduces, knee angle β maintenance reduces, and is increased to 75 ° up to the back angle [alpha].In zone 3, the ratio of the speed that speed that the back angle [alpha] increases and knee angle β reduce equals that (α is β) from (40 in relational graph, 25) slope that changes to (47,15) perhaps equals (α, β) the slope of from (60,15) to (75,0) variation.When the input back promoted the operation commencing signal, when in zone 4 back angle [alpha] and knee angle β being set, it is constant that the back angle [alpha] keeps, and only knee angle β reduces.When back angle [alpha] and knee angle β arrive the critical place in zone 4 and zone 1, the back angle [alpha] moves according to relevant figure with knee angle β, perhaps when back angle [alpha] and knee angle β arrive the critical place in zone 4 and zone 3, the back angle [alpha] moves with identical figure with knee angle β, because their operation is all from zone 3.
When the commencing signal indication of transmitting from control box 11 starts the back step-down operation, among Figure 22 step S1 be judged to be "No", then the program of back forwards step S2 to.In step S2, because the operation that commencing signal causes the back to descend is judged to be "Yes", and operation part 82 is selected the operation figure shown in Figure 24 of decline figure in back shown in Figure 21 and extraction from storage area 81.Operation part 82 reads back angle [alpha] and knee angle β in an identical manner, situation as previously described, back angle [alpha] and knee angle β and operation figure shown in Figure 24 are compared, judge the operation requests of each brake 28 and 47 (step S4).This operation requests is " stopping request " of bottom 2, back or knee bottom 5, " lifting operation requests " or " step-down operation request ".
When constituting signal that the back promotes operation from control box 11 inputs, as shown in figure 24, be provided with bottom 2, back and knee bottom 5 or back angle [alpha] and knee angle β in zone 5, for example electric bed is the position (α that needed back promotes, β)=(75,0) situation, only rising to midway (for example α=60) in the operation separately when bottom, back 2, the situation that operator promotes only rises to midway (for example β=5), the situation that operator promotes when knee bottom 5, perhaps back bottom 2 and knee bottom 5 are moved to midway (α=60 for example when operator, β=5) time, only knee angle β increases, and the back angle [alpha] reduces.In addition, back angle [alpha] and knee angle β arrive the critical place in zone 5 and zone 6, and it is constant that the back angle [alpha] keeps, and knee angle β increases.When back bottom 2 and knee bottom 5 began to arrive zone 5 and zone 9 critical from zone 5, knee angle β remained on 25 °, and the back angle [alpha] reduces, with back part angle [alpha] and knee angle β according to relational graph conversion shown in Figure 24.When back angle [alpha] and knee angle β are positioned at regionally 8 the time, back angle [alpha] and knee angle β reduce.When back angle [alpha] and knee angle β were arranged in zone 7, the back angle [alpha] reduced, and it is constant that knee angle β keeps.Subsequently, when the back angle [alpha] arrived 0 °, knee angle β arrived 0 °.In the commencing signal of input back step-down operation, when back angle [alpha] and knee angle β were arranged in zone 9, knee angle β reduced to be transformed in zone 5 or the zone 8, and subsequently, back angle [alpha] and knee angle β move in the above described manner.Be that operation part 82 hypothesis setting back angle [alpha] or knee angle β are constant, bottom 2, back or 5 outputs of knee bottom " are stopped request ", suppose to increase back angle [alpha] and knee angle β, then to bottom 2, back or 5 outputs " lifting operation requests " of knee bottom, suppose to reduce the back angle [alpha] or knee angle β is constant, then to bottom 2, back or 5 outputs " step-down operation request " of knee bottom.
When 61 signal indication neither startup backs that are input to control section 62 promote operation through the importation from control box 11, when also not starting the back step-down operation, operation part 82 judges that the operation requests of bottom 2, back and knee bottom 5 all is " stopping request " (step S5).
When the operation requests of bottom, back 2 was " the stopping request " of step S6 among Figure 22, operation part 82 transmitted control signal to stop motor 69 (step S8) to the relay 66 of the brake of bottom, back 2.When the operation requests when bottom, back 2 is not " stopping request ", suppose that " lifting operation requests " is ("Yes"), then operation part 82 determines that in step S7 whether the operation requests of bottom, back 2 is " lifting operation requests ", and to relay 66 output control signals, with direction turning motor 69 (step S9) along the back angle [alpha] that increases bottom, back 2.Suppose that " step-down operation request " is ("No"), then operation part 82 is to relay 66 output control signals, with the direction turning motor 69 (step S10) along the back angle [alpha] that reduces bottom, back 2.
When the operation requests of knee bottom 5 was " the stopping request " of step S11 among Figure 22, operation part 82 transmitted control signal to stop motor 70 (step S13) to the relay 67 of the brake of knee bottom 5.When the operation requests when knee bottom 5 is not " stopping request ", suppose that " lifting operation requests " is ("Yes"), then operation part 82 determines that in step S12 whether the operation requests of knee bottom 5 is " lifting operation requests ", and to relay 67 output control signals, with direction turning motor 70 (step S14) along the knee angle β that increases knee bottom 5.Suppose that " step-down operation request " is ("No"), then operation part 82 is to relay 67 output control signals, with the direction turning motor 70 (step S15) along the knee angle β that reduces knee bottom 5.
Subsequently, flow process turns back to step S1 again, and carries out repetition with suitable spacing, rises or descend with the figure in Figure 20 or 21 in bottom 2, back and knee bottom 5.Because flow process turns back to step S1 after step S15 and step S2 is to open or close to judge that the back promotes switch, and judge that decline switch in back is to open or close, and if promoting switch, the back always opens, just carry out promoting operation, if perhaps the decline switch is always opened, just carry out step-down operation.All close when promoting switch or decline switch, then operation requests always is " stopping " among the step S5, and then all operations all stop.In order to promote operation continuously, the operator should open the lifting switch usually, if button then need be pushed switch a little while usually.All open simultaneously when promoting switch and decline switch, then operation stops usually, although this situation does not illustrate in the flow chart of Figure 22.Switch is set in the above described manner to increase safety.
Still with reference to second embodiment, just to the pushing of the switch that begins to promote or the switch that begins to descend (switch continue push) in case cause bottom 2, back and knee bottom 5 is moved according to the optimum intersection figures that obtain in advance, in conjunction with the motion of bottom 2, back and knee bottom 5, avoid locational skew and hard pressed sensation.Caregiver's (operator) subjective judgment can not influence the motion of electric bed.Thus, do not consider caregiver's subjective judgment, even when caregiver's conversion, electric bed also always moves according to the optimum intersection figure that obtains in advance, thereby promote in operation or the back step-down operation at the back, can guarantee to make the patient who lies on the sick bed to avoid sliding on one's sick bed.Make patient's upper body upright and make in the process that patient lies down, patient does not have hard pressed sensation.In addition, muscle that patient can not moved and the skew between the skin can not suffer to cause the obstruction of blood vessel, perhaps sanguimotor interruption, and further injured skin owing to muscle is stretched to the minute blood vessel that extends between the skin yet.Owing to be provided with waist bottom 4 in an embodiment, the waist that then promotes patient in operation and the back step-down operation at the back is stable.

Claims (31)

1. electric bed, it comprises:
The bottom, back;
The knee bottom;
First drive part, bottom, described back is used to fluctuate;
Second drive part, described knee bottom is used to fluctuate;
Control the control section of first drive part and second drive part, making the back angle [alpha] is the angle that bottom, described back promotes from level, with knee angle β be that described knee bottom changes with default figure from the angle that level promotes, this control section also comprises storage area, with storing coordinate point (0,0) and coordinate points (α 0, β 0) between figure connect, locate in this coordinate points (0,0), all be level bottom each bottom, back and the knee, at this coordinate points (α 0, β 0) locate, back bottom rise to by a plurality of points determine (α, β) in the coordinate system, this control section also comprises operation part, with first drive part and second drive part shown in the control, described back angle [alpha] and knee angle β is changed with described figure.
2. control method that is used for electric bed, this electric bed comprise the bottom, back, the knee bottom, and first drive part, the bottom, described back that is used to fluctuate, second drive part, the described knee bottom that is used to fluctuate, described control method comprises the following steps:
Preset coordinate point (0,0) and coordinate points (α in control section 0, β 0) between figure connect, locate in this coordinate points (0,0), all be level bottom each bottom, back and the knee, at this coordinate points (α 0, β 0) locate, the bottom, back rises to the (α that is determined by a plurality of points, β) in the coordinate system, the back angle [alpha] is the angle that bottom, described back promotes from level, with knee angle β be that (α is determined from the angle that level promotes in described knee bottom, β) coordinate system, described (α, β) coordinate system changes with default figure;
Drive described first drive pattern and described second drive pattern, described back angle [alpha] and knee angle β are changed with described figure.
3. control device that is used to control electric bed, this electric bed comprise the bottom, back, the knee bottom, and first drive part, the bottom, described back that is used to fluctuate, second drive part, the described knee bottom that is used to fluctuate, described control device comprises:
Storage area is with storing coordinate point (0,0) and coordinate points (α 0, β 0) between figure connect, locate in this coordinate points (0,0), all be level bottom each bottom, back and the knee, at this coordinate points (α 0, β 0) locate, back bottom rise to by a plurality of points determine (α is β) in the coordinate system;
Operation part is used for first drive part and second drive part shown in the control, and described back angle [alpha] and knee angle β are changed with described figure.
4. electric bed according to claim 1 wherein as described shown in the figure, provides respectively from level upwards to promote the lifting figure of bottom, described back and bottom, described back is dropped to the decline figure of level from the lifting state.
5. electric bed according to claim 4, wherein also comprise control box, be used to select bottom, described back is promoted operation from the back that level upwards promotes, with the back step-down operation that bottom, described back is dropped to level, and input enabling signal, be used to start the operation of described control section
Wherein when enabling signal has started the lifting operation of described back, described operation part compares promoting figure and described back angle [alpha] and knee angle β, when described back angle [alpha] or knee angle β when promoting figure and be complementary, just output stops request, when described back angle [alpha] or knee angle β when promoting the designed numerical value that goes out of figure, just output promotes operation requests, when described back angle [alpha] or knee angle β when promoting the designed numerical value that goes out of figure, just export the step-down operation request, when described enabling signal has started the step-down operation of described back, described operation part compares decline figure and described back angle [alpha] and knee angle β, when described back angle [alpha] or knee angle β and decline figure are complementary, just output stops request, as described back angle [alpha] or knee angle β during less than the designed numerical value that goes out of decline figure, just output promotes operation requests, as described back angle [alpha] or knee angle β during, just export the step-down operation request greater than the designed numerical value that goes out of decline figure.
6. electric bed according to claim 5, wherein control box has first switch, be used for order and begin the lifting operation of described back, and second switch, be used for order and begin the step-down operation of described back, when first switch opens, described operation part judges that described back promotes operation and begins, and closes and second switch when opening when described first switch, judges that then the step-down operation of described back has begun, when first switch and second switch were all closed, then output stopped request.
7. electric bed according to claim 4 wherein also comprises the flexes part, is used for back bottom is coupled to the knee bottom in the mode of bending, wherein said back angle [alpha] is 75 °, and knee angle β is 0 °, and constituting the coordinate points that promotes figure is (0,0), (0,25 ± 3), (40 ± 3,25 ± 3), (47 ± 3,15 ± 3), (60 ± 3,15 ± 3) and (75 ± 3,0), the coordinate points of formation decline figure is (75 ± 3,0), (64 ± 3,10 ± 3), (50 ± 3,10 ± 3), (40 ± 3,25 ± 3), (19 ± 3,25 ± 3), (0,10 ± 3) and (0,0).
8. electric bed according to claim 7, wherein fixed waist bottom is engaged between described flexes part and the described knee bottom, the foot bottom is engaged in bottom, described back is partly arrived in described knee bottom through flexible knee bends opposition side, described foot bottom cooperates with described knee bottom by bindiny mechanism, and moves corresponding to the motion of described knee bottom.
9. control method according to claim 2 wherein as described shown in the figure, provides respectively from level upwards to promote the lifting figure of bottom, described back and bottom, described back is dropped to the decline figure of level from the lifting state.
10. control method according to claim 9, wherein ought start described back and promote operation, begin back bottom when described level upwards promotes, compare promoting figure and described back angle [alpha] and knee angle β, when described back angle [alpha] or knee angle β when promoting figure and be complementary, just output stops request, when described back angle [alpha] or knee angle β when promoting the designed numerical value that goes out of figure, just output promotes operation requests, when described back angle [alpha] or knee angle β when promoting the designed numerical value that goes out of figure, just export the step-down operation request, when having started the step-down operation of described back, when making the bottom, back begin to drop to level, decline figure and described back angle [alpha] and knee angle β are compared, when described back angle [alpha] or knee angle β and decline figure are complementary, just output stops request, as described back angle [alpha] or knee angle β during less than the designed numerical value that goes out of decline figure, just output promotes operation requests, as described back angle [alpha] or knee angle β during, just export the step-down operation request greater than the designed numerical value that goes out of decline figure.
11. control method according to claim 9, wherein the bottom, back partly is coupled on the knee bottom by flexes in the mode of bending, and wherein said back angle [alpha] is 75 °, knee angle β is 0 °, and constituting the coordinate points that promotes figure is (0,0), (0,25 ± 3), (40 ± 3,25 ± 3), (47 ± 3,15 ± 3), (60 ± 3,15 ± 3) and (75 ± 3,0), the coordinate points that constitutes the decline figure is (75 ± 3,0), (64 ± 3,10 ± 3), (50 ± 3,10 ± 3), (40 ± 3,25 ± 3), (19 ± 3,25 ± 3), (0,10 ± 3) and (0,0).
12. control method according to claim 11, wherein fixed waist bottom is engaged between described flexes part and the described knee bottom, the foot bottom is engaged in bottom, described back is partly arrived in described knee bottom through flexible knee bends opposition side, described foot bottom cooperates with described knee bottom by bindiny mechanism, and moves corresponding to the motion of described knee bottom.
13. control device according to claim 3 wherein as described shown in the figure, provides respectively from level upwards to promote the lifting figure of bottom, described back and bottom, described back is dropped to the decline figure of level from the lifting state.
14. control device according to claim 13, wherein also comprise control box, be used to select bottom, described back is promoted operation from the back that level upwards promotes, with the back step-down operation that bottom, described back is dropped to level, and input enabling signal, be used to start the operation of described control section
Wherein when enabling signal has started the lifting operation of described back, described operation part compares promoting figure and described back angle [alpha] and knee angle β, when described back angle [alpha] or knee angle β when promoting figure and be complementary, just output stops request, when described back angle [alpha] or knee angle β when promoting the designed numerical value that goes out of figure, just output promotes operation requests, when described back angle [alpha] or knee angle β when promoting the designed numerical value that goes out of figure, just export the step-down operation request, when described enabling signal has started the step-down operation of described back, described operation part compares decline figure and described back angle [alpha] and knee angle β, when described back angle [alpha] or knee angle β and decline figure are complementary, just output stops request, as described back angle [alpha] or knee angle β during less than the designed numerical value that goes out of decline figure, just output promotes operation requests, as described back angle [alpha] or knee angle β during, just export the step-down operation request greater than the designed numerical value that goes out of decline figure.
15. control device according to claim 14, wherein control box has first switch, be used for order and begin the lifting operation of described back, and second switch, be used for order and begin the step-down operation of described back, when first switch opens, described operation part judges that described back promotes operation and begins, and closes and second switch when opening when described first switch, judges that then the step-down operation of described back has begun, when first switch and second switch were all closed, then output stopped request.
16. control device according to claim 13, wherein the bottom, back partly is coupled on the knee bottom by flexes in the mode of bending, and wherein said back angle [alpha] is 75 °, knee angle β is 0 °, and constituting the coordinate points that promotes figure is (0,0), (0,25 ± 3), (40 ± 3,25 ± 3), (47 ± 3,15 ± 3), (60 ± 3,15 ± 3) and (75 ± 3,0), the coordinate points that constitutes the decline figure is (75 ± 3,0), (64 ± 3,10 ± 3), (50 ± 3,10 ± 3), (40 ± 3,25 ± 3), (19 ± 3,25 ± 3), (0,10 ± 3) and (0,0).
17. control device according to claim 16, wherein fixed waist bottom is engaged between described flexes part and the described knee bottom, the foot bottom is engaged in bottom, described back is partly arrived in described knee bottom through flexible knee bends opposition side, described foot bottom cooperates with described knee bottom by bindiny mechanism, and moves corresponding to the motion of described knee bottom.
18. an electric bed, it comprises:
The bottom, back;
The knee bottom;
First drive part, bottom, described back is used to fluctuate;
Second drive part, described knee bottom is used to fluctuate;
Control the control section of first drive part and second drive part, making the back angle [alpha] is the angle that bottom, described back promotes from level, with knee angle β be that described knee bottom changes with default figure from the angle that level promotes, this control section also comprises storage area, with by reading coordinate points (0,0) and coordinate points (α 0, β 0) between figure connect, and store operation figure bottom bottom, back described in each zone and the knee, with (α, β) coordinate system is divided into a plurality of zones, locates in this coordinate points (0,0), each bottom, back and knee bottom all are levels, at this coordinate points (α 0, β 0) locate, the bottom, back rises to the (α that is determined by a plurality of points, β) in the coordinate system, this control section also comprises operation part, be used for determining which zone bottom, described back and knee bottom are positioned at, and on the basis of operation figure in determine zone, control described first drive part and second drive part.
19. a control method that is used for electric bed, this electric bed comprise the bottom, back, the knee bottom, first drive part, the bottom, described back that is used to fluctuate, second drive part, be used to fluctuate bottom the described knee, described control method comprises the following steps:
By reading coordinate points (0,0) and coordinate points (α 0, β 0) between figure connect, will (α, β) coordinate system is divided into a plurality of zones, locate in this coordinate points (0,0), all be level bottom each bottom, back and the knee, at this coordinate points (α 0, β 0) locate, back bottom rise to by a plurality of points determine (α, β) in the coordinate system, the back angle [alpha] is the angle that bottom, described back promotes from level, with knee angle β be that angle that described knee bottom promotes from level determines should (α, β) coordinate system;
Each zone is all preset the operation figure of bottom, described back and knee bottom at control section;
Determine which zone bottom, described back and knee bottom are positioned at;
On the basis of the operation figure in determined zone, control described first drive part and second drive part.
20. a control device that is used to control electric bed, this electric bed comprise the bottom, back, the knee bottom, and first drive part, the bottom, described back that is used to fluctuate, second drive part, the described knee bottom that is used to fluctuate, described control device comprises:
Storage area is with by reading coordinate points (0,0) and coordinate points (α 0, β 0) between figure connect, and store operation figure bottom bottom, back described in each zone and the knee, with (α, β) coordinate system is divided into a plurality of zones, locates in this coordinate points (0,0), each bottom, back and knee bottom all are levels, at this coordinate points (α 0, β 0) locate, back bottom rise to by a plurality of points determine (α, β) in the coordinate system, the back angle [alpha] is the angle that bottom, described back promotes from level, with knee angle β be that angle that described knee bottom promotes from level determines should (α, β) coordinate system;
Operation part is used for determining which zone bottom, described back and knee bottom are positioned at, and determine to control described first drive part and second drive part on the basis of regional operation figure.
21. electric bed according to claim 18 wherein as described shown in the figure, provides respectively from level upwards to promote the lifting figure of bottom, described back and bottom, described back is dropped to the decline figure of level from the lifting state.
22. electric bed according to claim 21, wherein also comprise control box, be used to select bottom, described back is promoted operation from the back that level upwards promotes, with the back step-down operation that bottom, described back is dropped to level, and input enabling signal, be used to start the operation of described control section
Wherein control box has first switch, be used for order and begin the lifting operation of described back, and second switch, be used for order and begin the step-down operation of described back, when first switch opens, described operation part judges that described back promotes operation and begins, when described first switch cuts out and second switch when opening, judge that then the step-down operation of described back begins, when first switch and second switch were all closed, then output stopped request.
23. electric bed according to claim 21 wherein also comprises the flexes part, is used for back bottom is coupled to the knee bottom in the mode of bending, wherein said back angle [alpha] is 75 °, and knee angle β is 0 °, and constituting the coordinate points that promotes figure is (0,0), (0,25 ± 3), (40 ± 3,25 ± 3), (47 ± 3,15 ± 3), (60 ± 3,15 ± 3) and (75 ± 3,0), the coordinate points of formation decline figure is (75 ± 3,0), (64 ± 3,10 ± 3), (50 ± 3,10 ± 3), (40 ± 3,25 ± 3), (19 ± 3,25 ± 3), (0,10 ± 3) and (0,0).
24. electric bed according to claim 23, wherein fixed waist bottom is engaged between described flexes part and the described knee bottom, the foot bottom is engaged in bottom, described back is partly arrived in described knee bottom through flexible knee bends opposition side, described foot bottom cooperates with described knee bottom by bindiny mechanism, and moves corresponding to the motion of described knee bottom.
25. control method according to claim 19 wherein as described shown in the figure, provides respectively from level upwards to promote the lifting figure of bottom, described back and bottom, described back is dropped to the decline figure of level from the lifting state.
26. control method according to claim 25, wherein the bottom, back partly is coupled on the knee bottom by flexes in the mode of bending, and wherein said back angle [alpha] is 75 °, knee angle β is 0 °, and constituting the coordinate points that promotes figure is (0,0), (0,25 ± 3), (40 ± 3,25 ± 3), (47 ± 3,15 ± 3), (60 ± 3,15 ± 3) and (75 ± 3,0), the coordinate points that constitutes the decline figure is (75 ± 3,0), (64 ± 3,10 ± 3), (50 ± 3,10 ± 3), (40 ± 3,25 ± 3), (19 ± 3,25 ± 3), (0,10 ± 3) and (0,0).
27. control method according to claim 26, wherein fixed waist bottom is engaged between described flexes part and the described knee bottom, the foot bottom is engaged in bottom, described back is partly arrived in described knee bottom through flexible knee bends opposition side, described foot bottom cooperates with described knee bottom by bindiny mechanism, and moves corresponding to the motion of described knee bottom.
28. control device according to claim 20 wherein as described shown in the figure, provides respectively from level upwards to promote the lifting figure of bottom, described back and bottom, described back is dropped to the decline figure of level from the lifting state.
29. control device according to claim 28, wherein also comprise control box, be used to select bottom, described back is promoted operation from the back that level upwards promotes, with the back step-down operation that bottom, described back is dropped to level, and input enabling signal, be used to start the operation of described control section
Wherein control box has first switch, be used for order and begin the lifting operation of described back, and second switch, be used for order and begin the step-down operation of described back, when first switch opens, described operation part judges that described back promotes operation and begins, when described first switch cuts out and second switch when opening, judge that then the step-down operation of described back begins, when first switch and second switch were all closed, then output stopped request.
30. control device according to claim 29, wherein fixed waist bottom is engaged between described flexes part and the described knee bottom, the foot bottom is engaged in bottom, described back is partly arrived in described knee bottom through flexible knee bends opposition side, described foot bottom cooperates with described knee bottom by bindiny mechanism, and moves corresponding to the motion of described knee bottom.
31. control device according to claim 30, wherein fixed waist bottom is engaged between described flexes part and the described knee bottom, the foot bottom is engaged in bottom, described back is partly arrived in described knee bottom through flexible knee bends opposition side, described foot bottom cooperates with described knee bottom by bindiny mechanism, and moves corresponding to the motion of described knee bottom.
CN 200310102348 2002-10-24 2003-10-23 Electric bed and control device and its control method Expired - Lifetime CN1271982C (en)

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