CN107019604A - Movable sickbed - Google Patents

Abstract

A movable hospital bed comprises a bed frame, a hand carriage is provided at one end of the bed frame, the bed frame is provided with four bed legs, universal rollers with electromagnetic brakes are respectively provided on the bed legs, each electromagnetic brake is electrically connected to a brake switch circuit, the bed frame is provided with a built-in power supply and a control chip, the built-in power supply supplies power to the control chip, each brake switch circuit is respectively electrically connected to the built-in power supply, the control chip respectively controls the on or off of the brake switch circuit, capacitive touch keys corresponding to the electromagnetic brakes are provided on the hand carriage, the capacitive touch keys are respectively electrically connected to the control chip, the control chip controls whether the corresponding electromagnetic brake works by detecting whether the capacitance of the corresponding capacitive touch key changes, all the capacitive touch keys are arranged in a row, the distance between two adjacent capacitive touch keys is not greater than 8 cm, and the distance between two capacitive touch keys separated by one capacitive touch key is not less than 8 cm.

Description

A portable hospital bed

technical field

The invention relates to a hospital article, in particular to a movable hospital bed.

Background technique

The movable sickbed that the hospital uses now can push the patient from the ward to the operating room or from the operating room to the ward very easily, but most of them use foot brakes or rely solely on the manpower of doctors and nurses to brake. In the emergency treatment process or when a patient has an emergency, since time is life, when doctors and nurses need to send the patient to the operating room for rescue as soon as possible, they will push the bed quickly, and the corridor design in the existing hospital building, All can't avoid the right-angle turn, so fast and safe turning while pushing the hospital bed quickly can only be realized by two or more doctors and nurses before and after the hospital bed, which is not only laborious but also unsafe. In addition, when entering the operating room, doctors and nurses need to brake the hospital bed in time. The use of existing foot brakes is prone to lock-up, resulting in brake failure, which increases unsafe factors.

Contents of the invention

The present invention overcomes the above-mentioned shortcomings of the prior art, provides a movable hospital bed, and improves the safety of use.

In order to achieve the above object, the present invention adopts the following technical solutions: a movable hospital bed, including a bed frame, one end of the bed frame is provided with a push frame, and the bed frame is provided with four bed legs, and the bed legs are respectively provided with electromagnetic brakes. Each electromagnetic brake is electrically connected to a brake switch circuit. The bed frame is equipped with a built-in power supply and a control chip. The built-in power supply supplies power to the control chip. Each brake switch circuit is electrically connected to the built-in power supply. To turn on or off the switch circuit, there are capacitive touch keys corresponding to the electromagnetic brakes on the trolley. The capacitive touch keys are electrically connected to the control chip, and the control chip detects whether the capacitance of the corresponding capacitive touch key changes. To control whether the corresponding electromagnetic brake works, all capacitive touch keys are arranged in a row, the distance between two adjacent capacitive touch keys is not more than 8cm, and the distance between two capacitive touch keys separated by a capacitive touch key is not less than 8cm .

Further, the electromagnetic brake is an electromagnetic powder brake, and the electromagnetic powder brake includes a housing, in which a magnetic powder chamber is arranged, and an excitation coil is wound around the outer circumference of the magnetic powder chamber, and the housing is hinged to the foot of the bed through a vertical shaft, and the vertical shaft is connected to the foot of the bed. There is a conductive rotating pair between the feet of the bed, a first wire is electrically connected between the excitation coil and the conductive rotating pair, a central hole for the first wire routing is provided in the vertical shaft, and the brake switch circuit and the conductive rotating pair are connected to each other. The second wire is electrically connected, and the universal roller includes a wheel shaft and a wheel body. The wheel shaft is rotatably connected with the housing and extends into the magnetic powder chamber. The wheel body is fixed on the wheel shaft, and the wheel shaft is a magnetically conductive wheel shaft.

Further, the electromagnetic brake is an electromagnetic eddy current brake. The electromagnetic eddy current brake includes a housing and an excitation coil wound on the housing. The housing is hinged to the foot of the bed through a vertical shaft. There is a conductive rotating pair, a first wire is electrically connected between the excitation coil and the conductive rotating pair, a central hole for routing the first wire is provided in the vertical shaft, and a second wire is electrically connected between the brake switch circuit and the conductive rotating pair. Two wires, the universal roller includes a wheel shaft and a wheel body. The wheel shaft passes through the center of the excitation wire reel and is fixedly connected with the housing. A metal ring is provided on the wheel body. The wheel body and the metal ring are sleeved on the wheel shaft. plate.

Further, the electromagnetic brake is an electromagnetic friction brake. The electromagnetic friction brake includes a housing, an electromagnetic coil wound on the housing, and a brake disc fixed on the housing. The housing is hinged to the foot of the bed through a vertical shaft. , a conductive rotating pair is provided between the vertical rotating shaft and the foot of the bed, a first wire is electrically connected between the electromagnetic coil and the conductive rotating pair, a central hole for routing the first wire is provided in the vertical rotating shaft, and the brake switch circuit and A second wire is electrically connected between the conductive rotating pairs. The universal roller includes a wheel shaft and a wheel body. The wheel shaft is connected to the casing. An armature is elastically connected to the wheel body.

Further, the conductive rotating pair includes a conductive inner core and a conductive outer ring, the conductive inner core is fixed in the central hole and protrudes from the top of the vertical shaft, the conductive outer ring is fixed at the foot of the bed, and the conductive inner core The body extends into the foot of the bed and is rotationally connected with the conductive outer ring body and is in contact with the conductive body. The first wire is electrically connected to the conductive inner core body, and the second wire is electrically connected to the conductive outer ring body.

Further, the conductive rotating pair includes a conductive outer ring body and a conductive inner core body, the conductive outer ring body is fixed in the central hole, the first wire is electrically connected to the conductive outer ring body, the conductive inner core body is fixed at the foot of the bed, and the conductive outer ring body is fixed in the central hole. The inner core body extends into the central hole and is rotationally connected with the conductive outer ring body and conducts electricity. The first wire is electrically connected to the conductive outer ring body, and the second wire is electrically connected to the conductive inner core body.

Further, the bed frame is provided with a charging interface for charging with a built-in power supply.

Further, the bed frame is provided with a wireless charging receiving end, and the wireless charging receiving end is electrically connected to the built-in power supply.

After adopting the above technical solution, the present invention has the following advantages: the capacitive touch key is used to control the braking work of the electromagnetic brake, and doctors and nurses are already operating the capacitive touch key while grasping the push frame with their hands, which is simple and convenient , you need to control the electromagnetic brake for braking, you only need to move the position of the hand-grip push frame; because the electromagnetic brake is not a rigid brake, it is achieved by reducing the speed of the universal roller rotation, so it can be used according to the actual situation. It is necessary to control the specific electromagnetic brake for braking to achieve effective control during the bed pushing process. For example, when turning right, the universal roller in front of the right can be braked so that the bed will automatically turn right when it is pushed, improving Efficient and safe turning, but braking is required when arriving in the operating room, and all electromagnetic brakes can be controlled at the same time to achieve deceleration of the hospital bed; in addition, the electromagnetic brake can reduce the locking phenomenon during braking, while the one used on the hospital bed The size of the electromagnetic brake is small, so the braking force will not be too large. On the premise of ensuring effective braking, it can avoid sudden braking and ensure the safety of patients on the hospital bed. They will not fall due to too much inertia when braking. ;All capacitive touch keys are arranged in a row, the distance between two adjacent capacitive touch keys is not more than 8cm, and the distance between two capacitive touch keys separated by a capacitive touch key is not less than 8cm. The consideration of palm width ensures that doctors and nurses can operate capacitive touch keys more conveniently, and can operate two adjacent capacitive touch keys at the same time with one hand, while avoiding the situation of simultaneously operating three capacitive touch keys with one hand , to ensure the safety of operation and use.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing:

FIG. 1 is a schematic structural view of Embodiment 1 of the present invention;

Fig. 2 is the schematic diagram of the push frame in the first embodiment of the present invention;

Fig. 3 is a schematic diagram of the assembly of the electromagnetic brake, the universal roller and the foot of the bed in Embodiment 1 of the present invention;

Fig. 4 is a schematic diagram of the assembly of the electromagnetic brake and the universal roller in the second embodiment of the present invention;

Fig. 5 is a schematic diagram of the assembly of the electromagnetic brake and the universal roller in the third embodiment of the present invention.

detailed description

Embodiment one:

The present invention provides a movable hospital bed, as shown in Figure 1 and Figure 2, comprising a bed frame 1, one end of the bed frame 1 is provided with a push frame 11, the bed frame 1 is provided with four bed legs 12, the bed legs 12 There are universal rollers 2 with electromagnetic brakes on the bed, and each electromagnetic brake is electrically connected to a brake switch circuit. The bed frame 1 is provided with a built-in power supply 3 and a control chip. The built-in power supply 3 supplies power to the control chip. Each brake switch circuit They are respectively electrically connected to the built-in power supply 3, and the control chip controls the on or off of the brake switch circuit respectively. The hand push frame 11 is provided with capacitive touch keys 4 corresponding to the electromagnetic brakes one by one, and all the capacitive touch keys 4 are connected to the control chip respectively. Electrically connected, the control chip controls whether the corresponding electromagnetic brake works by detecting whether the capacitance of the corresponding capacitive touch key 4 changes. All the capacitive touch keys 4 are arranged in a row, and the distance D1 between two adjacent capacitive touch keys 4 is not If it is greater than 8cm, the distance D2 between two capacitive touch keys 4 separated by one capacitive touch key 4 is not less than 8cm.

Use the capacitive touch key 4 to control the braking work of the electromagnetic brake. Doctors and nurses are already operating the capacitive touch key 4 while grasping the trolley 11 with their hands. It is simple and convenient. It is necessary to control the electromagnetic brake for braking. It is only necessary to move the position of the hand push frame 11; since the electromagnetic brake is not a rigid brake, but the brake is realized by reducing the rotation speed of the universal roller 2, the specific electromagnetic brake can be controlled according to actual needs Braking is performed to achieve effective control during the bed pushing process. For example, when turning right, the universal roller 2 in front of the right can be braked so that the bed will automatically turn right when it is pushed, improving the efficiency and safety of turning. When braking is required when arriving in the operating room, all electromagnetic brakes can be controlled at the same time to realize the deceleration of the hospital bed; in addition, the electromagnetic brake can reduce the locking phenomenon during braking, and the electromagnetic brake used on the hospital bed has a small volume , so the braking force will not be too large. On the premise of ensuring effective braking, avoid sudden braking, ensure the safety of patients on the hospital bed, and will not fall due to too much inertia when braking; all capacitive touch keys 4 are arranged in a row, the distance D1 between two adjacent capacitive touch keys 4 is not greater than 8cm, and the distance D2 between two capacitive touch keys 4 separated by one capacitive touch key 4 is not less than 8cm. The consideration of palm width ensures that doctors and nurses can operate capacitive touch keys 4 more conveniently, and can operate two adjacent capacitive touch keys 4 at the same time with one hand, while avoiding operating three capacitive touch keys at the same time with one hand 4, to ensure the safety of operation and use.

Hand push frame 11 adopts simple and easy structure, is realized by a cross bar and gets final product. The built-in power supply 3 can adopt accumulators, such as lithium batteries, etc., and a charging interface for charging the built-in power supply 3 is provided on the bed frame 1, and can also be charged by wireless charging. Built-in power supply 3 also can adopt dry battery. The brake switch circuit can be realized by electronic switches such as transistors, field effect transistors or thyristors. The control chip judges the operation intention of the doctor and the nurse according to the capacitance change of the capacitive touch key 4, thereby determining whether to send a switch signal to make the brake switch circuit conduction. Generally, the capacitance change of the capacitive touch key 4 sends a high-level signal to the control chip, otherwise it is a low-level signal.

In this embodiment, the electromagnetic brake is an electromagnetic powder brake. As shown in FIG. 3 , the electromagnetic powder brake includes a housing 51. A magnetic powder chamber 511 is provided in the housing 51. An excitation coil 52 is placed around the outer periphery of the magnetic powder chamber 511. 51 is hinged with the foot of the bed 12 through the vertical rotating shaft 53, a conductive rotating pair is provided between the top of the vertical rotating shaft 53 and the foot of the bed 12, and a first wire 521 is electrically connected between the excitation coil 52 and the conductive rotating pair, and the vertical rotating shaft 53 is provided with a central hole 531 for the routing of the first wire, and a second wire 522 is electrically connected between the brake switch circuit and the conductive rotating pair. Rotationally connected and extended into the magnetic powder chamber 511, the wheel body 22 is fixed on the wheel shaft 21, and the wheel shaft 21 is a magnetically conductive wheel shaft. When the brake switch circuit is turned on, the magnetic powder 9 in the magnetic powder cavity 511 is attracted together by the magnetic force of the excitation coil 52 and is tightly attached to the wheel shaft 21, thereby realizing braking. It may be considered that heat dissipation fins are provided on the outer periphery of the housing 51 to achieve heat dissipation.

The rotation connection between the vertical shaft and the foot of the bed can be achieved by inserting the vertical shaft into the foot of the bed, or the vertical shaft can be sleeved outside the foot of the bed to realize the connection, and the former is adopted in this embodiment. And in this embodiment, the conductive rotary pair includes a conductive inner core 61 and a conductive outer ring 62, the conductive inner core 61 is fixed in the central hole and protrudes from the top of the vertical shaft 53, and the conductive outer ring 62 is fixed At the foot of the bed 12, the conductive inner core 61 extends into the foot of the bed and is rotatably connected with the conductive outer ring 62 and is electrically conductive. The first conductive wire 521 is electrically connected to the conductive inner core 61, and the second conductive wire 522 is electrically connected to the conductive outer ring. . When the universal roller rotates around the axis of the vertical shaft, it will drive the vertical shaft to rotate together with the conductive inner core, while keeping the entire circuit from the electromagnetic brake to the brake switch circuit conducting.

It can be understood that when the vertical shaft sleeve is used to realize the connection outside the foot of the bed, the conductive outer ring body can be selected to be fixed in the center hole, the first wire is electrically connected to the conductive outer ring body, and the conductive inner core body is fixed on the foot of the bed to conduct electricity. The inner core body extends into the central hole and is rotationally connected with the conductive outer ring body and conducts electricity. The first wire is electrically connected to the conductive outer ring body, and the second wire is electrically connected to the conductive inner core body.

It can be understood that in order to avoid the impact of axial force on the conductive rotating pair, axial positioning needs to be achieved between the vertical shaft and the foot of the bed, for example, the step in the hole cooperates with the shaft shoulder, and the use of radial pins to pass through the foot of the bed and Common methods such as vertical axis realization and so on.

Embodiment two:

Different from the electromagnetic brake of Embodiment 1, as shown in Figure 4, in this embodiment, the electromagnetic brake is an electromagnetic eddy current brake, and the electromagnetic eddy current brake includes a housing 51 and an excitation coil 54 wound on the housing 51, the housing The body 51 is hinged to the foot of the bed through a vertical shaft, a central hole is provided in the vertical shaft, a conductive rotating pair is provided between the top of the vertical rotating shaft and the foot of the bed, and a second electrical connection is made between the excitation coil 54 and the conductive rotating pair. A wire, a second wire is electrically connected between the brake switch circuit and the conductive rotating pair. The universal roller 2 includes a wheel shaft 21 and a wheel body 22. The wheel shaft 21 passes through the center of the excitation coil 54 and is fixedly connected to the housing 51. The wheel body 22 is provided with a metal ring 23, the wheel body 22 and the metal ring 23 are sleeved on the wheel shaft 21, and the metal ring 23 faces the excitation coil 54. When the brake switch circuit is turned on, the coil 54 is excited to form a magnetic field. Once the metal ring 23 rotates, it will cut the magnetic field lines to generate eddy current. The eddy current of the metal ring 23 interacts with the magnetic field to form a braking torque. Since there is no contact friction and it relies entirely on magnetic force, when the electromagnetic eddy current brake is turned on, as long as the roller rotates, it will slow down and be durable.

Refer to Embodiment 1 for other content not described.

Embodiment three:

Different from the electromagnetic brake of Embodiment 1, as shown in Figure 5, in this embodiment, the electromagnetic brake is an electromagnetic friction brake, and the electromagnetic friction brake includes a housing 51, an electromagnetic coil 55 wound on the housing 51 and The brake disc 56 fixed on the housing 51, the housing 51 is hinged with the foot of the bed through a vertical shaft, a central hole is provided in the vertical shaft, a conductive rotating pair is provided between the top of the vertical shaft and the foot of the bed, and an electromagnetic coil 55 is electrically connected to a first wire with the conductive rotating pair, and a second wire is electrically connected between the brake switch circuit and the conductive rotating pair. The universal roller 2 includes a wheel shaft 21 and a wheel body 22, and the wheel shaft 21 is connected to the housing 51. An armature 26 is elastically connected to the wheel body 22 , the armature 26 rotates with the wheel body 22 , and the armature 26 faces the brake disc 56 . After the brake switch circuit is turned on, the electromagnetic coil 55 sucks the armature 26, and the armature 26 contacts and rubs against the housing 51 to achieve braking. For this reason, the part in contact with the armature 26 on the housing 51 adopts wear-resistant materials or installs brake pads. This is similar to the common clutch brake, and the braking effect is the most direct. The elastic connection between the wheel body 22 and the armature 23 can be realized by the guide column 24 and the spring 25, the armature 26 rotates synchronously with the wheel body 22 through the guide column 24, the spring 25 is sleeved on the guide column 24, and the guide column 24 is parallel to the movement direction of the armature 26 , in addition to the spring 25, elastic elements such as spring washers can also be utilized.

Refer to Embodiment 1 for other content not described.

The rollers in the above embodiments can also be universal wheels. Except above-mentioned preferred embodiment, the present invention also has other implementation modes, those skilled in the art can make various changes and distortions according to the present invention, as long as not departing from the spirit of the present invention, all should belong to the defined in the claims of the present invention scope.

Claims (8)

1. a kind of movable sickbed, including bedstead, one end of bedstead are provided with hand push frame, bedstead is provided with four cabinet bases, its feature It is：The universal rolling wheel with electromagnetic brake is respectively equipped with cabinet base, each electromagnetic brake is electrically connected with brake switch electricity Road, bedstead is provided with built-in power and control chip, and built-in power powers for control chip, each brake switch circuit respectively with it is interior Power electric connection is put, control chip controls the on-off of brake switch circuit respectively, and hand push frame is provided with and electromagnetic brake one One corresponding capacitance touch key, capacitance touch key is electrically connected with control chip respectively, and control chip is corresponding by detection Whether the electric capacity of capacitance touch key changes to control whether corresponding electromagnetic brake works, all capacitance touch key rows into One row, the spacing of two neighboring capacitance touch key is not more than 8cm, is spaced two capacitance touch of a capacitance touch key The spacing of key is not less than 8cm.

2. movable sickbed as claimed in claim 1, it is characterised in that：The electromagnetic brake is braked for electromagnetic powder Device, electromagnetic power brake includes being provided with magnetic chamber in housing, housing, and magnetic chamber periphery passes through around excitation coil, housing is equipped with Vertical rotating shaft is hinged with cabinet base, provided with conductive revolute between vertical rotating shaft and cabinet base, between excitation coil and conductive revolute The centre bore being provided with the first wire, vertical rotating shaft for the first conductor wiring is electrically connected with, brake switch circuit rotates with conductive The second wire is electrically connected between pair, universal rolling wheel includes wheel shaft and wheel body, and wheel shaft is connected with housing into rotation and stretches into magnetic chamber In, wheel body is fixed on wheel shaft, and wheel shaft is magnetic conduction wheel shaft.

3. movable sickbed as claimed in claim 1, it is characterised in that：The electromagnetic brake is electromagnetic eddy current braking Device, electromagnetic whirlpool brake includes housing and around the home the excitation drum on housing, and housing is hinged by vertical rotating shaft and cabinet base, The first wire is electrically connected between excitation drum and conductive revolute, is erected provided with conductive revolute between rotating shaft and cabinet base vertically The centre bore for the first conductor wiring is provided with straight rotating shaft, being electrically connected with second between brake switch circuit and conductive revolute leads Line, universal rolling wheel includes wheel shaft and wheel body, and wheel shaft is from excitation line disk center through being fixedly connected with the casing, and wheel body is provided with metal Ring, wheel body and metal ring are on wheel shaft, and becket is in face of excitation drum.

4. movable sickbed as claimed in claim 1, it is characterised in that：The electromagnetic brake is braked for electromagnetic friction Device, electromagnetic friction brake includes housing, magnet coil around the home on housing and the brake disc being fixed on housing, housing It is hinged by vertical rotating shaft and cabinet base, provided with conductive revolute between vertical rotating shaft and cabinet base, magnet coil and conductive revolute Between be electrically connected with the first wire, be provided with the centre bore for the first conductor wiring in vertical rotating shaft, brake switch circuit with it is conductive The second wire is electrically connected between revolute, universal rolling wheel includes wheel shaft and wheel body, and wheel shaft is connected with housing, and elasticity connects on wheel body Armature is connected to, armature follows wheeling thereof, and armature faces brake disc.

5. the movable sickbed as described in one of claim 2-4, it is characterised in that：The conductive revolute is included in conductive Core body and conductive outer ring body, conductive core body are fixed in centre bore and stretched out from the top of vertical rotating shaft, and conductive outer ring body is consolidated Due to cabinet base, conductive core body stretches into cabinet base and rotates connection with conductive outer ring body and contact conduction, the first wire and conductive core Body is electrically connected, and the second wire is electrically connected with conductive outer ring body.

6. the movable sickbed as described in one of claim 2-4, it is characterised in that：The conductive revolute includes conductive outer Ring body and conductive core body, conductive outer ring body are fixed in centre bore, and the first wire is electrically connected with conductive outer ring body, conductive core Body is fixed on cabinet base, and conductive core body stretches into centre bore and rotates connection with conductive outer ring body and contact conduction, and the first wire is with leading Electric outer ring body electrical connection, the second wire is electrically connected with conductive core body.

7. movable sickbed as claimed in claim 5, it is characterised in that：The bedstead is provided with what is charged for built-in power Charging inlet；The bedstead is provided with wireless charging receiving terminal, and wireless charging receiving terminal is electrically connected with built-in power.

8. movable sickbed as claimed in claim 6, it is characterised in that：The bedstead is provided with what is charged for built-in power Charging inlet；The bedstead is provided with wireless charging receiving terminal, and wireless charging receiving terminal is electrically connected with built-in power.