CN1256921C - Wheelchair structure - Google Patents

Abstract

The invention discloses a wheelchair structure, which is formed by combining a seat with front and rear wheels at the bottom, a seat cushion on the seat, a foot platform pivoted at the front end of the seat, a chair back pivoted at the rear end of the seat, a back cushion covered on the chair back and armrests arranged at two sides of the seat. The lifting height of the top frame of the chair seat is adjusted by the pushing device and the supporting frame, the pushing device and the connecting rod are arranged between the chair back and the foot platforms to generate synchronous linkage, the bottom of the seat cushion and the bottom of the back cushion have the transverse sliding function, the back cushion can also have the longitudinal sliding function, and the chair seat is suspended in the air and can be guided into a closestool to have the function of going to the toilet. Thereby, the wheelchair can achieve the actions which can not be achieved in the past, and the movement space and the movement range of the user are increased.

Description

wheelchair structure

technical field

The invention relates to a wheelchair structure used by people with mobility issues instead of walking, in particular to a mobile chair for patients who are unable to walk or physically weak.

Background technique

The traditional wheelchair only has a simple carrying function, and the patient turns the rear wheel with both hands or is pushed forward by others. The only advantage is that it has the function of folding and folding. The patient's help is limited, so other wheelchairs have to be developed, such as the following patent cases in Taiwan, China:

1. Announcement No. 459528 "Wheelchair Structure with Seat Lifting and Translation Functions" was announced on October 11, 2001. It is a wheelchair that emphasizes that the seat can be lifted, but when the seat is pushed up together with the person, it will The center of gravity of the chassis is unstable due to the weight on the top, and once the person moves, it is easy to cause the wheelchair to topple over, so you need to be very careful when using it.

2. Announcement number 444590 "Wheelchair structure that can lie on the back" was announced on July 1, 2002. It is a wheelchair that emphasizes that the angle of the backrest and the footrest can be adjusted. However, the backrest and the footrest are individually adjusted and cannot be connected together. Action, and it is implemented manually, not by electric control.

3. Announcement No. 481001 "Wheelchair with Supine Device" was announced on March 21, 2002. It is also a wheelchair that emphasizes that the angle of the backrest and footrest can be adjusted, but the footrest is extremely short, and the human foot cannot be extended. Then it cannot be fully adapted to all users (such as: broken feet); and the chair cushion is fixed on the back of the chair, so when the inclination angle of the chair back changes, the chair cushion will produce a difference with the person's back along with the change of the inclination angle of the chair back. Rubbing can cause sore bed or wound pain; and the push device (i.e. telescopic cylinder) under the seat will hinder the cooperation between the wheelchair and the domestic toilet, so people cannot go to the toilet in the wheelchair.

4. Announcement No. 331135 "A hospital bed that can be converted into a wheelchair" was announced on May 1, 1998. This case emphasizes that the hospital bed can be converted into a wheelchair. Linked movement, and turning the hospital bed into a wheelchair can not be used ergonomically, so it can only be implemented for a short time, and cannot be used for people to sit for a long time.

5. Announcement No. 374017 "Wheelchair Seat Back Reclining Set" was announced on November 11, 1999. The case emphasized that the back of the chair can be adjusted by the expansion and contraction of the telescopic cylinder, but unfortunately the footrest does not It has the function of adjusting the angle of the chair, and there is no linkage with the back of the chair, so it cannot be used for people lying flat; and when the angle of the back of the chair is changed, the back cushion will also rub against the back of the person.

6. Announcement No. 328719 "Multifunctional Wheelchair" was announced on March 21, 1998. One of the characteristics of this case is that there is a movable ram in the center of the seat cushion so that people can go to the toilet in a wheelchair; However, because the user is sitting on the seat cushion, it is not easy to remove the ram, and the ram is out of touch with the seat cushion after being pulled out. If it is put back to its original position, it still causes assembly troubles because the user is sitting on the seat cushion. Another feature of this case is that the chair back can change the inclination angle with the help of positioning brackets, but the operation is manual and has no linkage with the foot platform, and the angle of the foot platform cannot be adjusted, so it cannot be used for the user's feet to be level. put.

Most conventional wheelchairs have the following problems, such as:

1. General wheelchairs do not have a seat lifting mechanism, so patients are likely to be troubled when they want to take high objects; and general wheelchairs cannot be lowered to the height of a general family bed (about 45 cm), so patients cannot be moved to the wheelchair Or move from the wheelchair to the bed, thus causing distress to the caregivers; in addition, in order to match the height of the tabletop, the chair seat and armrests are often higher than the tabletop, causing troubles in use. Possible lowering, the armrest must have a turning function, so that it can adapt to various desktops; although the current wheelchair has a lifting function, it is often limited by the mechanism, such as the aforementioned Taiwan Patent No. 459528. The armrests and foot supports cannot be raised simultaneously, so when the center of gravity is on the top, it is easy to cause the chassis to become unstable and cause accidents such as the wheelchair toppling over.

2. The backrest and footrest of general wheelchairs do not have the function of synchronously adjusting the angle, and the vertical adjustment is also implemented manually, such as the aforementioned Taiwan, China Announcement Nos. 444590, 481001, and 331135. Therefore, the person's back and feet move asynchronously, causing the user's center of gravity to be out of the center and prone to slipping; in addition, the operation is also likely to bring troubles to the caregivers; and the wheelchairs in Taiwan, China Announcements No. 444590 and 481001 still have a tilt angle The disadvantage is that the back of the chair and the foot platform cannot be completely level, so that the horizontal lying function cannot be provided. In this way, it is easy to increase the burden on the lower back.

3. The center of the seat cushion of a general wheelchair does not have a movable sliding pad, so the patient cannot sit on the wheelchair to go to the toilet. This makes the patient who is not able to walk have to leave the wheelchair to go to the toilet, causing great inconvenience in use. Although Taiwan, China announced the first The seat cushion of the No. 328719 patent already has a detachable central sliding pad, but as mentioned above, once it is pulled out, it will be disconnected from the seat cushion. or even cause loss.

4. The back pad of a general wheelchair is fixedly combined with the back of the chair, so when the back of the chair changes its tilt angle, the back pad will rub against the back of the person as the angle of the back of the chair changes. This is because the back of the chair is reclining. When the state rotates forward, it will generate a forward thrust, so that the back of the person will have a forward force, causing the person to be pushed forward, and the shear force parallel to the back of the chair will cause friction between the back and the back of the chair (because the back of the chair is not Similarly, when the back of the chair is tilted backward, the same situation will also occur, which will make the user who has a sore on the back and produces a mattress feel pain. This is an unsolved problem in wheelchairs at present.

5. Secondly, today's wheelchair foot pedals do not have a telescopic adjustment function, so the pedals cannot be lowered to the ground, so users with broken feet will be troubled by the difficulty of moving their feet to the pedals; and the pedals are left and right. Individual independent settings, if not adjusted synchronously, will easily cause disturbance in implementation.

6. Furthermore, most wheelchairs cannot be used to go to the toilet. This is due to the limitations of the organization, so that it is difficult for the wheelchair to cooperate with the household toilet; But it combines a frame-shaped seat on the metal chair frames on both sides, and uses the frame-shaped seat for the user to ride. Since there are no cross bars at the front and rear ends of the chair frames on both sides, although the wheelchair can be used with the toilet , but the structure is not enough to bear the gravity load, causing the lower part of the chair frame on both sides to bend and deform after the overweight user rides, so it is only suitable for children or light users, not suitable for overweight users Implementation, so it causes regrets in use.

Contents of the invention

The purpose of the present invention is to provide a wheelchair structure that can be used in conjunction with a toilet.

Another object of the present invention is to provide a wheelchair structure in which the seat of the wheelchair can be raised and lowered.

Yet another object of the present invention is to provide a wheelchair structure in which the wheelchair foot platform and the chair back have synchronous linkage.

Another object of the present invention is to provide a wheelchair structure in which the back cushion of the wheelchair has a longitudinal movement effect on the back of the chair.

Yet another object of the present invention is to provide a wheelchair structure in which a long gap can be formed in the center of the seat cushion of the wheelchair to facilitate defecation and defecation of the patient.

In order to realize the above-mentioned purpose of the invention, the present invention adopts the following designs:

A wheelchair structure, comprising: a seat for riding; a seat cushion covering the top surface of the seat; a foot platform pivotally connected to the front end of the seat; a chair back pivotally connected to the rear end of the seat; The back pad covered on the back of the chair; two armrests on both sides of the seat; and four front and rear wheels under the seat; The above-mentioned top frame is composed of two left and right trusses and two front and rear pivots; the bottom frame is composed of two left and right mother bars and a front cross bar connected between the two mother bars; the support frame will A side frame body in which both sides of the top frame and the bottom frame are fixedly combined.

A wheelchair structure, comprising: a seat for riding; a seat cushion covering the top surface of the seat; a foot platform pivotally connected to the front end of the seat; a chair back pivotally connected to the rear end of the seat; The back pad covered on the back of the chair; two armrests on both sides of the seat; and four front and rear wheels under the seat; The support frame between the frame and the bottom frame; the above-mentioned top frame is composed of two left and right trusses and two front and rear pivots arranged between the two trusses, and a parallel sliding frame is formed under the trusses. Long rail groove; the chassis is composed of two hollow mother rods on the left and right, a child rod stretched inside the mother rod and a front cross bar combined between the two mother rods. The front end of the mother rod is combined with a front wheel, and the The rear end of the rod is combined with the rear wheel; and a push device is fixed under the chassis, and the push device has a telescopic rod, and the end of the telescopic rod is combined with the bottom frame rod; in addition, the support frame is a fork-shaped connection Rod, which is composed of a first push rod, a second push rod and a pivot that cross-joins the two push rods. The connecting rods are arranged crosswise; the top of the first push rod shares a pivot with the top frame truss and the side frame of the foot platform, while the top of the second push rod is horizontally installed with a slide bar and standardizes the slide frame under the seat top frame In the rail groove; through the control device on the armrest, the telescopic rod of the push-pull device can be stretched and stretched, and the sub-rod in the mother rod of the chassis can also be stretched, so that the angle between the first and second connecting rods Change, so that the chair seat produces a lift change.

A wheelchair structure, comprising: a seat for riding; a seat cushion covering the top surface of the seat; a foot platform pivotally connected to the front end of the seat; a chair back pivotally connected to the rear end of the seat; The back pad covered on the back of the chair; two armrests on both sides of the seat; and four front and rear wheels under the seat; The support frame between the frame and the bottom frame; the top frame is composed of the left and right trusses and the front and rear pivots between the two trusses, and there is a parallel sliding frame under the trusses to form a long track groove; the underframe is composed of two left and right female bars and a front cross bar combined between the two female bars. The front end of the female bar is combined with the front wheel, and the rear end is combined with the rear wheel. frame to form a long rail groove; in addition, there is a push device under the chassis, the push device has a telescopic rod, and the end of the telescopic rod has a slide rod; in addition, the support frame is a fork-shaped connecting rod, which is pushed by the first Rod, the second push rod and the pivot that crosses the two push rods. Among them, the top end of the first push rod shares a pivot with the top frame truss and the side frame of the foot platform, and the bottom end shares a pivot with the telescopic extension of the push device. The rods share the same sliding rod, and this sliding rod is regulated in the long rail groove of the sliding frame of the mother rod; while the top of the second push rod is horizontally installed on the sliding rod and is regulated in the sliding frame rail groove under the top truss, and the bottom end It is pivotally combined with the mother rod; through the control device on the armrest, the telescopic rod of the push device can be expanded and contracted, and the angle between the first and second connecting rods can be changed at the same time, so that the seat can be raised and lowered. Variety.

A wheelchair structure, comprising: a seat for riding; a seat cushion covering the top surface of the seat; a foot platform pivotally connected to the front end of the seat; a chair back pivotally connected to the rear end of the seat; The back pad covered on the back of the chair; two armrests on both sides of the seat; One of the rods is connected to the end of the telescopic rod of the push device, and the rear end of the push device is fixed under the top frame of the seat, so that the push device is set at an oblique angle; the other rod is connected to a connecting rod The end of the connecting rod is pivotally connected, and the other end of the connecting rod is pivotally connected with the side bar of the foot platform; through the control device on the armrest, the push device under the top frame of the seat can push the back of the chair and the space between the back of the chair and the foot platform. The connecting rod is pivotally connected to achieve synchronous movement and angle adjustment of the chair back and footrest.

A wheelchair structure, comprising: a seat for riding; a seat cushion covering the top surface of the seat; a foot platform pivotally connected to the front end of the seat; a chair back pivotally connected to the rear end of the seat; The back pad covered on the back of the chair; two armrests on both sides of the seat; and four front and rear wheels under the seat; the feature is that longitudinal slide rails are set on the two side bars of the back frame , and another group of sliding frames composed of several cross bars and two side bars, under the side bars of the sliding frame, a rail symmetrically matched with the longitudinal slide rail is set, and the back pad has a longitudinal sliding function through the group of sliding frames.

A wheelchair structure, comprising: a seat for riding; a seat cushion covering the top surface of the seat; a foot platform pivotally connected to the front end of the seat; a chair back pivotally connected to the rear end of the seat; A back cushion covering the back of the chair; two armrests on both sides of the seat; and four front and rear wheels under the seat; the feature is that the body of the seat cushion is provided with grooves, and It faces forward, so the shape of the seat cushion body is U-shaped; and the groove can accommodate the front and rear pads, which are the first sliding pad and the second sliding pad, and the two pads are connected by hinges; There are sliding rails on the side wall, and the two sides of the second sliding pad are provided with connecting rails that are symmetrically matched with the sliding rails; when the first sliding pad is pulled outward, the second sliding pad will move together until the first sliding pad moves toward the The lower pivot swings, and the second sliding pad moves to the position of the first sliding pad, so that a long gap is formed in the center of the seat cushion body.

Implementation according to the present invention can obtain following result:

1. The wheelchair can adjust the lifting height, which is convenient for the user to pick up high or low objects, and can be easily approached to the table. It can also be lowered to the same height as the bed surface to facilitate translation.

2. The backrest and footrest of the wheelchair can adjust the inclination angle synchronously, and the appropriate angle can be determined according to individual needs, and functions such as lying flat and sitting can be achieved.

3. The back pad of the chair back has the function of longitudinal sliding, so when the chair back is adjusted to inclination angle, the back pad can slide along with the patient's back, so it can avoid friction and pain with the patient's back; and when the user changes from lying down to When seated, the forward thrust of the chair back is reduced.

4. Both the seat cushion and the back cushion have a lateral sliding function, which enables the nurse to easily move the patient from the wheelchair to the bed or from the bed to the wheelchair.

5. When the wheelchair is raised and lowered, the seat is raised and lowered as a whole, and there are armrests or stop bars on both sides to stop the user, which can prevent the patient from rolling over and improve the sense of safety; and both the armrests and stop bars have the function of swinging, which can benefit the patient. The seat cushion moves out or in laterally.

6. The top frame of the wheelchair seat has two front and rear pivots, and the bottom frame has the design of the front cross bar, which can make the bottom of the seat cushion appear suspended, so that the wheelchair can be reversed to the toilet, that is, the toilet can be inserted into the wheelchair, and The structural design of the seat can withstand heavy loads and prevent deformation.

7. There is a first sliding pad and a second sliding pad in the hollow groove of the seat cushion body. After the two sliding pads are moved at the same time, the first sliding pad can naturally pivot to the hem without affecting the placement or movement of the user's feet. , and after the second sliding pad is moved out, a gap can be formed in the center of the body. When the wheelchair is backed up to the top of the toilet, the gap is positioned directly above the toilet, so as to facilitate the use of large and small defecation.

8. The pedal of the foot platform has a telescopic function, which allows the user to straighten his feet and lie comfortably when he changes from a sitting position to a flat lie; Move onto the pedals to avoid lifting the feet.

9. The front and rear ends of the top frame of the chair seat have horizontal pivots, and the front end of the bottom frame has a cross bar. Therefore, with the assistance of three horizontal rods, the seat seat can not only make the wheelchair cooperate with the toilet, but also support the toilet. Large gravity, while avoiding the bending deformation of the structure caused by the influence of gravity.

10. The above-mentioned devices are not limited to individual implementation, they can be used in combination or as a whole, such as: the back of the chair and the foot platform have the functions of lying down and sitting and lying down through the linkage mechanism, and the back pad can be used in the process of moving. Sliding to prevent the patient's back from rubbing, and then use the lifting function to make the height equal to the bed surface after lying flat, so as to facilitate lateral sliding. The lateral movement is achieved by the sliding function of the seat cushion and back cushion. Proper use of various institutions in the operation process allows patients to receive the most appropriate and careful care, thereby avoiding secondary injuries to patients and reducing the hard work of medical staff or nursing staff.

According to the embodiment shown in the drawings, the detailed description is as follows:

Description of drawings

Fig. 1: three-dimensional appearance view of the wheelchair structure of the present invention.

Figure 2: An exploded perspective view of the structure of the wheelchair of the present invention.

Fig. 3: A three-dimensional structure diagram of the seat of the wheelchair of the present invention.

Figure 4: Schematic diagram of the rise of the seat top frame of the present invention.

Figure 5: Schematic diagram of the lowering of the seat top frame of the present invention.

Figure 6: A schematic diagram of the connection relationship between the foot platform and the chair back of the wheelchair of the present invention.

Fig. 7: a schematic diagram of the tilting of the foot platform and the chair back of the wheelchair of the present invention.

Figure 8: A schematic diagram of erecting the footrest and the chair back of the wheelchair of the present invention.

Fig. 9: The three-dimensional appearance diagram of the wheelchair of the present invention in a completely horizontal reclining position.

Fig. 10: Schematic diagram of the rotation action of the armrest of the present invention.

Figure 11: Schematic diagram of the separation of the lying flat wheelchair, the back cushion and the seat cushion of the present invention.

Figure 12: It is a schematic diagram when the back of the wheelchair is not tilted backward.

Fig. 13: It is a schematic diagram of Xi-style wheelchair when the seat back is tilted.

Fig. 14: It is the schematic diagram when the seat back of the wheelchair of the present invention is tilted.

Fig. 15: Schematic diagram of the separation of another wheelchair cushion and back cushion of the present invention.

Fig. 16: An exploded perspective view of the wheelchair back and back pad of the present invention.

Figure 17: An exploded perspective view of the seat cushion and the central sliding pad of the present invention.

Fig. 18: A schematic diagram of cooperation between the wheelchair and the toilet of the present invention.

Figure 19: Schematic diagram of the action of the seat cushion and the central slide pad of the present invention.

Fig. 20: A side view of the second aspect of the present invention.

Fig. 21: A structural diagram of the foot platform of the third aspect of the present invention.

Detailed ways

As shown in Fig. 1 and Fig. 2, they are respectively the three-dimensional appearance diagram and partial exploded view of the wheelchair structure of the present invention, revealing that the structure of the wheelchair 10 includes: a seat 1 that can be used for riding, and a seat that is covered on the seat 1. A seat cushion 2 on the top surface, a foot platform 3 arranged in front of the seat 1, a chair back 4 arranged behind the seat 1, a back cushion 5 covered on the seat back 4, a back cushion 5 arranged on the seat 1 Handrails 6 on both sides and the front and rear wheels 14,15 located under the seat.

As mentioned above, the side end of the armrest 6 is provided with a control device 8 so that the patient can operate and control the actions described below with one hand: such as the forward and backward movement of the wheelchair 10 and the left and right turns, the lifting of the seat 1, the movement of the foot platform 3 and the chair back 4 Synchronous linkage and angle adjustment; its power comes from a set of power supply system 7 located at the front and bottom of the seat 1, which is a rechargeable battery structure; in addition, a single electric wheel 9 is set under the seat 1, which uses The motor 91 is driven by the reduction gearbox 92 and the two bevel gears 93, 94, etc., so that the electric wheel 9 can move forward, backward, turn or stop, so that the patient can drive as he pleases; It is a conventional known art, and is not a feature of the present invention, so it is only briefly described here, and will not be explained in detail.

As shown in Fig. 2 and Fig. 3 again, the three-dimensional structural diagram of the seat seat of the wheelchair in Fig. 3 reveals that the seat seat 1 is generally composed of a top frame 11, a bottom frame 12, and a support frame 13 combined between the top frame and the bottom frame. (fork-shaped connecting rod). Among them, the top frame 11 is composed of two truss bars 111 on the left and right, and two pivots 112 and 113 on the front and rear. In addition, several cross bars 115 (three are shown in the figure) can be added as reinforcements, and they are connected under the truss bars 111. Parallel sliding frames 114 are provided, and long rail grooves are formed between the trusses 111 and the sliding frames 114 . Again, the underframe 12 is made up of two left and right hollow female bars 121, a sub-bar 122 stretchable in the two female bars, and a front cross bar 123 combined between the left and right two female bars. The front ends of the two female bars 121 are combined with the front wheels 14 , and the rear end of the second sub-rod 122 is combined with the rear wheel 15; the aforementioned two sub-rods 122 can also be connected with a cross bar (not disclosed), but this cross bar is not provided in this case, because once the cross bar is set, it will be It is impossible to match the wheelchair 10 with the toilet, in other words, the toilet cannot be moved into the seat 1 of the wheelchair 10; because there is no crossbar, the seat 1 is suspended, so that the wheelchair 1 can be moved backwards for the toilet to enter the seat 1, this can be understood from the disclosure in Figure 18; secondly, under the reinforcement of the front and rear pivots 112, 113 of the top frame 11 and the reinforcement of the bottom frame 12 by the front cross bar 123, it not only has a stable structure, prevents deformation, but also can bear heavy loads . In addition, the two sets of supporting frames 13 are combined on both sides of the top frame 11 and the bottom frame 12 , and there is no certain limitation on their structure, as long as they can be combined with the top frame 11 and the bottom frame 12 .

However, in order to enable the top frame 11 to have a lifting function, the following support frame 13 is replaced by a fork link, which is composed of a first push rod 131, a second push rod 132 and a pivot 133 that crosses the two push rods. The bottom ends of these two push rods are individually connected to the front end of the female rod 121 and the rear end of the sub-rod 122 with pivots 134, 135, so that the two connecting rods are arranged crosswise, and the top of the first push rod 131 is connected to the top truss rod 111, foot The table side frame 31 shares the same pivot 112, and the slide bar 136 installed horizontally on the top of the second push rod 131 is regulated in the track groove of the slide frame 114 under the top frame truss bar 111, and the slide bar 136 can be translated in the track groove Effect, can be implemented with slide bar 136 in conjunction with roller 137 for being beneficial to rolling again. In addition, two pushing devices 16 in the same direction are fixed under the left and right sides of the chassis 12. The pushing devices 16 are decelerated by a small motor 161 through a reduction gear set (not shown) and then driven by a worm wheel (not shown). (i.e. telescopic rod 162) produces telescopic effect, this device is a conventional structure, not a feature of this case, and this structure can also be replaced by the cooperation of a pneumatic cylinder or a gear and a rack, so the push device 16 is not limited to the one disclosed in the drawing structure; the end of the aforementioned telescopic rod 162 needs to be combined with the bottom frame rod 122 (fixed by the pivot 164 in the figure), so in order to facilitate configuration, the connecting block 163 can be used to combine the telescopic rod 162, the sub-rod 122 and the first There are three push rods 131 in total. The telescopic movement of the telescopic rod 162 of the push device 16 can synchronously drive the advance and retreat of the bottom frame rod 122, so that the two push rods 131 and 132 of the support frame 13 produce angle changes, and then the pivot 112 and the slide rod 136 are jointly lifted. The top frame 11 can change the lifting height, which can be understood from the following figures 4 and 5.

As shown in Figure 4, it is a schematic diagram of the rise of the seat top frame 11. When the telescopic rod 162 of the push device 16 shrinks inwardly, the bottom frame rod 122 can be moved inwardly. At this time, the first push rod 131 receives the child rod 122 Linkage effect produces angle change with the second push rod 132, that is, the angle θ1 between the two push rods 131, 132 will gradually decrease, but the height H1 of the fork-shaped connecting rod 13 will gradually increase instead; The slide bar 136 at the top of the second push rod 132 is standardized in the rail groove of the top frame slide frame 114, so when the first and second push rods 131, 132 are linked together, the pivot 112 and the slide bar 136 will jointly force the Top frame 11 rises steadily, relatively, the height of seat 1 promptly increases.

On the contrary, as shown in FIG. 5 , it is a schematic diagram of the lowering of the seat top frame 11. When the telescopic rod 162 of the push device 16 stretches out, the bottom frame rod 122 can be moved outward. At this moment, the first push rod 131 is pressed. The sub-rod 122 is affected by linkage and produces an included angle change with the second push rod 132. This included angle θ2 increases gradually, but the height H2 of the support frame 13 decreases instead; and when the two push rods 131, 132 are linked At the same time, the top frame 11 will be driven down steadily by the pivot 112 and the slide bar 136, and correspondingly, the height of the seat 1 will be reduced. Through the lifting function of the seat top frame 11, it is convenient for the patient to sit on the wheelchair 10 and just take the items at a high or low place, and it can also be properly adjusted to match the height of the desktop, which is more convenient for the patient to move between the wheelchair and the hospital bed. Move horizontally.

As shown in Figure 6, it is a diagram of the linkage mechanism between the foot platform 3 and the chair back 4. It is revealed in the figure that the foot platform 3 is composed of left and right side bars 31, an upper cross bar 32 connecting the two side bars, and is arranged in the side bars. Two sub-rods 35, the lower cross bar 36 connecting the two sub-rods, two positioning bolts 37 for fixing the sub-rods and the double pedals 33 located under the sub-rods are formed, and foot pads 34 can be set between the two side bars 31 in addition. In the foregoing, the top of the two side bars 31 share the same pivot 112 with the top frame truss bar 111 and the first push bar 131 (not disclosed); the lower ends of the two side bars 31 are provided with slots 311 to After the positioning bolt 37 is penetrated, it is screwed into the sub-rod 35, so that the side bar 31 and the sub-rod 35 are combined and fixed, and when the positioning bolt 37 is loosened, the lifting height of the twin sub-rods 35 can be adjusted synchronously. Fix by means of positioning bolt 37 again, accordingly pedal 33 can be lowered to the ground in order to facilitate the translation of the patient's feet, and it is more beneficial for the patient to stretch the feet when changing the lying position from a sitting position.

Secondly, the chair back 4 is made up of left and right two side bars 41 and several cross bars 43, and a push handle 46 is set at an appropriate height of the two side bars 41 to facilitate the caregiver to move. The truss 111 shares a pivot 113, and a rod 42 is extended under the two side rods 41. This rod 42 can be regarded as an extension rod of the side rod 41; ) is connected to the end of the telescopic rod 171 of a push device 17, and the rear end of the push device 17 is fixed under the top frame 11 (it is better to be located under the truss bar 111). The structure 16 is identical, and it can also be replaced by other motorized devices with equivalent functions; in addition, another support rod 42 (positioned at the bottom of the drawing) is pivotally connected with a connecting rod 18, and the other end of the connecting rod 18 is connected with the connecting rod 18. The side rod 31 of the foot platform is pivotally connected, and in order to facilitate the linkage, a strut 32 can be added on the side rod 31 to connect with the connecting rod 18; since the push device 17 is arranged at an oblique angle, it will expand when the telescopic rod 171 stretches. Drive the chair back 4 to produce a tilting action, and the chair back 4 synchronously drives the foot platform 3 to produce a tilting action by means of the connecting rod 18, so the foot platform 3 and the chair back 4 are synchronously linked to adjust the angle, and the linked process can be as follows Figure 7 and Figure 8 show the knowledge.

As shown in Figure 7, it is about the process of linking the foot platform 3 and the chair back 4 into a reclining chair state. The aforementioned known top frame 11, the foot platform 3, and the chair back 4 are in a pivotal relationship, so when the propulsion device When the telescopic rod 171 of 17 shrinks, it will affect the chair back 4 to make it tilt backward with the pivot 113 as the axis, and the chair back 4 will synchronously drive the foot platform 3 with the pivot 112 as the axis And rise until the foot platform 3, the chair back 4 and the top frame 11 are in a horizontal state, and finally cut off the propulsion device 17 power supply by a safety switch (not disclosed, such as a limit switch) to stop the action.

On the contrary, as shown in Figure 8, when the telescoping rod 171 of propulsion device 17 stretches, it will affect the chair back 4 to make it rise forward with the pivot 113 as the axis, and the chair back 4 will synchronously drive the foot by the connecting rod 18 again. Platform 3, make it drop with the pivot 112 as the axis, until the foot platform 3 and the chair back 4 are completely erected into a vertical seat state, and finally cut off the power supply of the propulsion device 17 through a safety switch (not disclosed) to stop the action . It can be seen from this that the patient can adjust the foot platform 3 and the chair back 4 to an appropriate angle according to his own needs through the control device 8 .

As shown in FIG. 9 , it is a schematic diagram of the foot platform 3 and the chair back 4 interlocking to form a reclining chair state, which can be used by the patient lying flat, and the pedal 33 can be stretched and adjusted in length. Secondly, armrests 6 are provided on both sides of the seat 1, and these two armrests 6 are fixed on the side of the top frame truss 111. The fixing method is as shown in Figure 10. The side of the truss 111 is fixed with the base 60, and the base One side 62a of the hinge is fixed on the seat 60, and the other side 62b is fixedly combined with the armrest 6. The bottom bar of the armrest 6 is provided with a positioning pin 61, and the positioning pin 61 is provided with a spring 63 in series, so that when the armrest 6 is erected, The positioning pin 61 is inserted into the positioning hole 601 of the base 60 by the recovery effect of the spring 63 to achieve the positioning effect; otherwise, the positioning pin 61 will break away from the positioning hole 601 after being pulled up, so that the armrest 6 can rotate 180° sideways , because the structure of handrail 6 and the principle of action are conventional known skills, and non-characteristics of the present invention, then only briefly express.

As shown in Figure 11, it is an exploded view of the wheelchair 10, the seat cushion 2 and the back cushion 5 in a lying state, wherein the three cross bars 115 of the top frame 11 of the seat 1 are all provided with slide rails 19, and The bottom surface of the seat cushion 2 is provided with three connecting rails 21 (or other sliding components) that are matched with the slide rail 19; when the armrest 6 is released from the positioning relationship, it can swing downwards, and the seat cushion 2 can move horizontally outward at this time In other words, after the armrest 6 no longer blocks the seat cushion 2, the seat cushion 2 can move laterally by the cooperation of the connecting rail 21 and the slide rail 19; Insert it into the positioning hole 25 of the bottom plate of the seat cushion 2 to achieve positioning; in addition, an elastic positioning bolt (not shown) can also be provided under the truss 111 to position the seat cushion 2 .

Secondly, a slide rail 44 is provided on the cross bar 43 of the seat back 4 , and a connecting rail 51 corresponding to the slide rail 44 is provided on the bottom surface of the back pad 5 . In addition, an elastic positioning pin 45 is provided on the side of the side bar 41 or the push frame 46, and the bottom surface of the back pad 5 is provided with an insertion hole 52 for the positioning pin 45 to be inserted into and positioned. In the hole 52, the back pad 5 in the usual state is positioned on the chair back 4, but when the positioning pin 45 is manually pulled out from the jack 52, the back pad 5 can be connected by the connecting rail 51 and the slide rail 44. Cooperate to produce a lateral movement effect, and then insert the positioning bolt 45 into the positioning hole 53 to achieve positioning after the lateral movement. Through the lateral movement of the above-mentioned seat cushion 2 and back cushion 5, the patient can be translated from the wheelchair 10 to the bed or from the bed to the wheelchair 10. Since the seat cushion 2 and the back cushion 5 are like skateboards, the patient does not need to move when moving. It needs to be assisted by other auxiliary boards, so that the patient's wound or decubital pain can be avoided.

In addition, when the wheelchair 10 changes from a seat to a recliner (as shown in Figure 9) or from a recliner to a seat (as shown in Figure 1), during the synchronous linkage between the foot platform 3 and the chair back 4, the patient's back Can produce rubbing relation with back pad 5, make back bed sore or wound cause pain, this can be understood by shown in Fig. 13, Fig. 14.

As shown in Figure 13, when the chair back 4 is in an upright state, the contact between the human body and the back pad 5 is the head a1, the back a2, and the buttocks a3, and the center of gravity of the human body is placed at the position of the buttocks a3 when the human body is in a sitting posture; When the chair back 4 pivots backward, as shown in Figure 14, the human head a1 and back a2 will fall backwards, but the buttocks a3 remain unchanged; only the back a2, buttocks a3 and pivot 113 are A triangular correspondence, since the rotation axis of the back a2 is located close to the position of the buttocks a3, and the rotation axis of the back pad 5 is at the pivot 113, the back pad 5 fixed on the chair back 4, along with the seat back 4 When rotating, it will generate friction with the back a2 of the human body; in addition, due to the difference in the rotation axis, when the wheelchair 1 is changed from a lying position to a sitting position, the normal force of the chair back 4 rising is different from the normal force of the human back a2, and will The force that causes the human body to be pushed forward is generated, so that the buttocks a3 of the human body slide forward slightly.

In order to solve this problem, the only way to overcome it is to make the back pad 5 have a longitudinal sliding function, that is, as shown in Figure 15, during the rotation process of the chair back 4, the back pad 5 can be produced with the contact of the back a2 of the human body. Sliding action, that is to say the back pad 5 is no longer fixed on the chair back 4, but slides along with the rising or reclining of the chair back 4, so although the back pad 5 keeps in close contact with the back a2, as the chair back 4. When leaning backward, the back pad 5 will slide down; otherwise, if the chair back 4 rises, the back pad will rise. In this way, the back a2 and the back pad 5 will always keep in contact without friction.

In order to make the back pad 5 have a longitudinal sliding function, the design of the present invention is as shown in Figure 16. The longitudinal slide rails 47 are all arranged on the two side bars 41 of the chair back 4, and a set of sliding frames 40 are additionally set up. 48. Several crossbars 43 combined with the two side bars are formed. Under the side bars 48, a connecting rail 49 symmetrically matched with the slide rail 47 is arranged. In this way, the sliding frame 40 has a Longitudinal sliding function, like this, just can make back pad 5 longitudinal displacement on chair back 4 by back frame 40; Still be provided with slide rail 44 on the cross bar 43 of slide frame 40 again, and back pad 5 still remains There is a connecting rail 51 symmetrically matched with the slide rail 44, so the back pad 5 still has a lateral movement effect, so the seat pad 5 of the embodiment of this figure can have both vertical and horizontal movement functions. In addition, the present invention also enables the seat cushion 5 to only have the function of longitudinal movement, without the function of lateral movement, that is, the connecting rail 49 that is symmetrically matched with the two longitudinal slide rails 47 of the back frame 4 is only provided under the seat cushion 5, and no slide is provided. Frame 40, so just can make seat cushion 5 only have vertical movement function, and without lateral movement function.

As shown in Figure 17, it is an exploded view of the seat cushion 2 of the wheelchair of the present invention. The body of the seat cushion 2 is provided with a groove 28, and its notch faces forward, so the shape of the seat cushion body is U-shaped; Accommodate the front and rear two sliding pads, respectively the first sliding pad 23 and the second sliding pad 24, the two pads are connected by hinges 25; the two side walls of the groove 28 are provided with slide rails 22, and the second sliding pad Both sides of 24 are provided with connecting rails 26 that are symmetrically matched with slide rails 22; during normal use, the first and second sliding pads 23, 24 are moved laterally into the grooves 28, so that the seat cushion 2 no longer has grooves to present , seat cushion shown in Fig. 2, Fig. 11 is arranged. But when the user wants to go to the toilet, he only needs to move the wheelchair 10 backwards so that the toilet is inserted into the seat 1, as shown in Figure 18. Hold the pull handle 27 in front of the first sliding pad 23 and pull it out, then you can pull it out together with the second sliding pad 24 (as shown in Figure 19), until the first sliding pad 23 faces down and the second sliding pad 24 The displacement can be stopped before the notch. At this moment, the center of the seat cushion 2 presents an elongated gap, so that the patient's excretory organs are positioned on the elongated gap to facilitate defecation, and the first sliding pad 23 at this time is a hem. state, because it is located in the center, it will not hinder the placement or movement of the patient's feet; on the contrary, when it is desired to restore, first move the second sliding pad 24 into place, and then move the first sliding pad 23 into place, and then Fast and convenient implementation effect can be achieved.

In addition, the above-mentioned Figures 1 to 6 reveal that the two sides of the seat cushion 2 of the seat 1 are provided with stop rods 116, and the stop rods 116 are pivotally arranged on the side of the roof truss 111, and the seat cushions can be prevented from being blocked by the stop rods 116. 2 left and right changes; in addition, the seat cushion 2 can also be blocked by means of the left and right armrests 6, but when the armrest 6 is lowered, in the state where there is no armrest 6 for both hands to lean on, it is necessary to rely on the stopper bar 116 to block the seat cushion 2 to avoid displacement.

The second embodiment

As shown in Figure 20, the feature of this aspect is that the rear end of the mother bar 121 of the underframe 12 is directly combined with the rear pulley 15, and there is no longer the aforementioned sub-bar 122, but a flat sliding frame 124 is provided under the mother bar 121 And form the long rail groove; In addition, the first connecting rod 131 bottom in the support frame 13 is provided with slide bar 138 (slide bar can be combined with roller), and this slide bar 138 is more standardized in the rail groove of slide frame 124; Next , the lower end of the female rod 121 is combined with the push device 16, and the end of the telescopic rod 161 of this device shares the sliding rod 138 with the first connecting rod 131, so when the telescopic rod 161 stretches, it can directly push the first connecting rod 131, Then the first connecting rod 131 and the second connecting rod 132 are used to change the clamping angle, so that the pivot 112 at the top of the two connecting rods and the sliding rod 136 jointly push the top frame 11 up and down stably. The advantage of this top design is that the bottom frame 12 is no longer a telescopic rod body, so when the seat 1 is raised and lowered, the width W between the front and rear wheels 14 and 15 will not change, and only the support frame 13 is stretched and contracted by the push device 16 Therefore, the chassis stability of the wheelchair 1 is improved, and the safety is also improved.

The third embodiment

As shown in Figure 21, different from the aforementioned foot platform 3, the two pedals 33 are pivotally arranged on the branch rods 38 of the sub-rods 35, not on the lower cross-bars 36; The sub-rod 35 passing through the side rod 31 can be fixed in a screw-in manner with the positioning bolt 37 .

Above, the present invention has been described in detail according to the good implementation forms shown in the drawings; but the industry can make various changes within the scope not exceeding the gist of the present invention. Therefore, all implementation forms using structures related to the present invention , as long as the various modified embodiments within the scope of the gist of the present invention are within the scope of the present invention.

Claims (13)

1. a Wheelchair structure comprises: the seat support that can Gong take; One covers the seat cushion on the seat support end face; One is articulated in the sufficient platform of the preceding end pivoting of seat support; One is articulated in the chair back of chair base rear end pivot; One covers the back pad on the chair back; Two handrails of being located at the seat support both sides respectively; Reach four and be located at the beneath front and rear wheel of seat support respectively; It is characterized in that:

Seat support by upper frame, underframe and be located at upper frame and underframe between bracing frame formed;

Aforementioned upper frame be about two truss, front and back two pivots form;

And underframe by about two female bars, the front rail that is connected between two female bars formed;

Bracing frame is the side frame body with upper frame and underframe both sides secure bond.

2. a Wheelchair structure comprises: the seat support that can Gong take; One covers the seat cushion on the seat support end face; One is articulated in the sufficient platform of the preceding end pivoting of seat support; One is articulated in the chair back of chair base rear end pivot; One covers the back pad on the chair back; Two handrails of being located at the seat support both sides respectively; Reach four and be located at the beneath front and rear wheel of seat support respectively; It is characterized in that:

Seat support by upper frame, underframe and be located at upper frame and underframe between bracing frame formed;

Aforementioned upper frame is made up of left and right two booms and forward and backward two pivots that are located between two booms, and under boom parallel sliding sash is arranged and form long rail groove;

Underframe is made up of aircraft carrier bar in left and right two, the stretch sub bar in female bar and the front rail that is combined between two female bars, and the front end of this female bar is combined with front-wheel, and the rear end of sub bar is in conjunction with trailing wheel; Again, be installed with under the underframe and push away the device of pulling, this pushes away the device of pulling and has expansion link, and the end of expansion link then combines with the underframe sub bar;

In addition, bracing frame is a forked link, and it is formed by first push rod, second push rod and with the pivot of two push rod cross coupled, and the bottom of this two push rod is combined in female bar front end and sub bar rear end with pivot respectively, two connecting rods is intersect setting; The first push rod top and upper frame boom, sufficient platform bogie side frame are shared a pivot again, and the second push rod top then is horizontally set with in slide bar and the sliding sash rail groove of standard under the seat support upper frame;

That sub bar in the female bar of underframe is also produced is flexible by being located at the actuation means on the handrail, being made the expansion link that pushes away the device of pulling, and the angle of first and second connecting rod is changed, and changes and make seat support produce lifting.

3. a Wheelchair structure comprises: the seat support that can Gong take; One covers the seat cushion on the seat support end face; One is articulated in the sufficient platform of the preceding end pivoting of seat support; One is articulated in the chair back of chair base rear end pivot; One covers the back pad on the chair back; Two handrails of being located at the seat support both sides respectively; Reach four and be located at the beneath front and rear wheel of seat support respectively; It is characterized in that:

Seat support by upper frame, underframe and be located at upper frame and underframe between bracing frame formed;

Upper frame is made up of left and right two booms and forward and backward two pivots that are located between two booms, and under boom parallel sliding sash is arranged and form long rail groove;

Underframe is made up of left and right two female bars and the front rail that is combined between two female bars, and this female bar front end is combined with front-wheel, and the rear end then is combined with trailing wheel, and underframe has sliding sash and forms long rail groove; In addition, underframe has and pushes away the device of pulling, and this pushes away the device of pulling and has expansion link, and the expansion link end has slide bar;

In addition, bracing frame is a forked link, it is to form by first push rod, second push rod and with the pivot of two push rod cross coupled, wherein, a pivot is shared with upper frame boom, sufficient platform bogie side frame by first push rod top system, same slide bar is then shared with the expansion link that pushes away the device of pulling in the bottom, and this slide bar and standard are in the long rail groove of the sliding sash of female bar; The second push rod top then is horizontally set with in slide bar and the sliding sash rail groove of standard under the upper frame boom, and the bottom then is combined on female bar with pivot;

When the expansion link that pushes away the device of pulling stretches the angle between first and second connecting rod is changed by being located at the actuation means on the handrail, being made, change and make seat support produce lifting.

4. as claim 1 to 3 any one described Wheelchair structure wherein, it is characterized in that: be extended with pole under two side levers of the chair back, wherein a pole is connected with the end of the expansion link that pushes away the device of pulling, and the rear end system that pushes away the device of pulling is fixed under the seat support upper frame, makes that pushing away the device of pulling is the oblique angle setting; Another pole then articulates with an interlinking lever end, and connecting rod end in addition then articulates with the side lever of sufficient platform; See through the actuation means be located on the handrail, made the pull device promotion chair back and the chair back and sufficient interstation of the pushing away seat support upper frame under articulate, and reach the chair back and synchronous interlock of sufficient platform and angle adjustment with connecting rod.

5. as claim 1 to 3 any one described Wheelchair structure wherein, it is characterized in that: sufficient platform by about two side levers, connect two side levers cross tube, be located at two sub bars in the side lever, the sheer pole, two that connect two sub bars is used for fixing the bolt of sub bar and the two pedal that is located under the sub bar is formed, foot is set between two side levers in addition fills up and contact in order to foot.

6. as claim 1 to 3 any one described Wheelchair structure wherein, it is characterized in that: sufficient platform by about two side levers, connect two side levers cross tube, connect two sub bars sheer pole, be located at the two pedal on the difference pole of two side levers and the location spiral shell that is arranged on the side lever is formed.

7. as claim 1 to 3 any one described Wheelchair structure wherein, it is characterized in that: have several cross bars between two booms of seat support upper frame, cross bar is provided with slide rail, and be provided with in the bottom surface of seat cushion and the integrating with of slide rail relative engagement, so that seat cushion has traversing effect, and it is traversing to hinder the spacer seat cushion by the default pin of both sides boom.

8. as claim 1 to 3 any one described Wheelchair structure wherein, it is characterized in that: the both sides boom side of seat support upper frame is being fixed pedestal, combine with handrail with hinge on the pedestal, be provided with pilot pin in the bottom bar of handrail, the pilot pin string is being established spring, can force pilot pin to insert in the default locating hole of pedestal then and reach locating effect.

9. as claim 1 to 3 any one described Wheelchair structure wherein, it is characterized in that: on two side levers for back of the body frame vertical slide rail is set, in addition by one group of sliding sash of forming by several cross bars and two side levers, under the side lever of sliding sash, be provided with and integrating with that vertical slide rail symmetry cooperates, thus, can make back pad see through this group sliding sash and have the straight skidding function.

10. Wheelchair structure as claimed in claim 9 is characterized in that: the cross bar of sliding sash is provided with horizontal slide rail, and back pad has and integrating with that horizontal slide rail symmetry cooperates.

11. Wheelchair structure as claimed in claim 9 is characterized in that: the chair back is provided with pilot pin, and the jack that the back pad bottom surface is provided with and pilot pin symmetry cooperates, this pilot pin can insert in the jack and back pad is located.

12. as claim 1 to 3 any one described Wheelchair structure wherein, it is characterized in that: the body of seat cushion is provided with groove, and notch forward, so the seat cushion body shape takes the shape of the letter U; Just can fill up ccontaining front and back two in the groove again, be respectively first skidding and second skidding, connect with hinge between two pads; The two side walls of groove is provided with slide rail in addition, and the both sides of second skidding are provided with and integrating with that the slide rail symmetry cooperates; When first skidding is pulled outwardly when moving, the second skidding meeting is together moved, and until first skidding pivot pendulum down, and second skidding moves to till the first skidding position, makes the seat cushion body center form long nick in order to patient's size defecation.

13. Wheelchair structure as claimed in claim 12 is characterized in that: before first skidding, can be provided with and draw handle.

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