CN106214368B - A kind of novel seat mechanism and the wheel-chair provided with the chair mechanism - Google Patents

Abstract

The invention provides a kind of novel seat mechanism, the chair mechanism mainly includes two four-bar linkages, two drive links, cushion connecting rod, baffle plate and the first drive mechanism, in addition the present invention also provides a kind of wheel-chair provided with the novel seat mechanism, the wheel-chair includes chassis walking mechanism, positioned at the anterior fixed support of chassis walking mechanism, the armrest mechanism positioned at fixed support top, aiding upright mechanism, pedal and novel seat mechanism positioned at both sides in the middle part of the walking mechanism of chassis, realizes random switching of the user between stance and sitting posture；A kind of novel seat mechanism of the present invention and the wheel-chair provided with the chair mechanism have the advantages that ingenious in design, compact conformation, simple to operate and safety and stability.

Description

Novel seat mechanism and wheelchair equipped with the seat mechanism

technical field

The invention relates to a seat mechanism, in particular to a novel seat mechanism and a wheelchair provided with the seat mechanism.

Background technique

Although standing rehabilitation wheelchairs help users stand up and take care of themselves, most of the users are paralyzed people, people with limited mobility or frail elderly. Due to their own physical reasons, it is not suitable for long-term stand upright. If the user drives the standing rehabilitation wheelchair outdoors and cannot find a place to sit and rest, it will be detrimental to the user's health. Although the standing rehabilitation wheelchair can allow the user to change from a standing position to a sitting position, the user's calf It still needs to be supported and fixed by a wheelchair, and the center of gravity of the body is forward. If the user maintains this posture for a long time, he will not be able to get a rest.

In summary, users are not suitable for long-term use of standing rehabilitation wheelchairs to stand without sitting down and resting. Therefore, it is of great significance to allow the user to sit down and rest at any time on the standing rehabilitation wheelchair, free the calf without resorting to external help.

Contents of the invention

The object of the present invention is to provide a new type of seat mechanism, which includes: two hinged four-bar mechanisms, arranged in parallel and symmetrically and fixed by the frame at the bottom; two transmission rods, the fixed ends of which are hinged on the machine On the frame; the cushion connecting rod, one end is vertically connected with the cushion supporting plate, and the other end is hinged with the moving ends of the two transmission rods through the movable end of the spring provided inside it, and is also connected to the moving end of the two transmission rods near its other end. The extension ends of the second link rods of the two hinged four-bar mechanisms are hinged; the two sides of the cushion connecting rod are also provided with slide grooves, and the movable end of the spring and the moving ends of the two transmission rods can be reciprocate along the chute; the baffle is located on both sides of the two hinged four-bar mechanisms and the inner side is provided with limit blocks; the first driving mechanism is movably connected to the support body at one end, and the other end is connected to the The connecting pieces at the middle and lower parts of the two transmission rods are hinged, and are used to drive the seat mechanism to expand and contract.

Preferably, the two transmission rods are arc rods.

Preferably, seat cushions are respectively hinged on both sides of the cushion support plate.

Preferably, the first drive mechanism is an electric push rod.

A wheelchair provided with the above-mentioned novel seat structure, the wheelchair comprises: a chassis running mechanism, a fixed bracket located at the front of the chassis running mechanism, an armrest mechanism whose bottom is fixed on the upper part of the fixed bracket, an auxiliary standing mechanism, Pedals located on both sides of the middle part of the chassis traveling mechanism and the new seat mechanism located at the middle and rear of the chassis traveling mechanism.

Preferably, the chassis running mechanism includes a bottom plate, a front wheel assembly and a rear wheel assembly respectively located at the front, rear and bottom of the bottom plate.

Preferably, the auxiliary standing mechanism includes a waist support mechanism, a hip support mechanism and a knee support mechanism.

Preferably, the waist and abdomen support mechanism includes a telescopic rod with one end movably connected to the upper part of the fixed bracket and the other end connected to the abdomen support device, waist pads connected to both sides of the abdomen support device, one end connected to the chassis The running mechanism is movably connected and the other end is movably connected with the second drive mechanism at the middle and lower part of the telescopic rod.

Preferably, the buttock support mechanism includes two third drive mechanisms located on both sides of the upper part of the fixed bracket, one end of which is respectively connected to the two third drive mechanisms, and the other end passes through the two third drive mechanisms located on both sides of the abdomen support device. Two binding straps connected to both sides of the buttock support pad behind the hook on the side and two connecting straps connected to both sides of the hip support pad at one end and connected to the knee support mechanism at the other end.

Preferably, it also includes a second driving mechanism controller located at the end of the armrest mechanism and an integrated controller located at the upper part of the abdominal support device.

In summary, a novel seat mechanism of the present invention and a wheelchair equipped with the seat mechanism have the advantages of ingenious design, compact structure, simple operation, safety and stability, and the like.

It should be understood that both the foregoing general description and the following detailed description are exemplary illustrations and explanations, and should not be used as limitations on the claimed content of the present invention.

Description of drawings

With reference to the accompanying drawings, more objects, functions and advantages of the present invention will be clarified through the following description of the embodiments of the present invention, wherein:

Fig. 1 schematically shows the external structure diagram when the novel seat mechanism of the present invention shrinks;

Fig. 2 schematically shows the internal structure diagram when the novel seat mechanism of the present invention is stretched;

Fig. 3 (a) to Fig. 3 (d) schematically show the schematic diagram of the extension process of the novel seat mechanism of the present invention;

Fig. 4 schematically shows a schematic diagram of a user standing on the wheelchair of the present invention;

Fig. 5 schematically shows a schematic view of a user sitting on the wheelchair of the present invention.

detailed description

The objects and functions of the present invention and methods for achieving the objects and functions will be clarified by referring to the exemplary embodiments. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in various forms. The essence of the description is only to help those skilled in the relevant art comprehensively understand the specific details of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

Fig. 1 to Fig. 3 show various structural diagrams of a novel seat mechanism 8 of the present invention, through which the user can maintain a sitting posture and obtain a certain rest. The seat mechanism 8 mainly includes: two hinged four-bar mechanisms (including frame 801, first connecting rod 802, second connecting rod 803 and connecting rod 804), two transmission rods 805, cushion connecting rod 806, The baffle plate 809 and the first driving mechanism 811 .

The two hinged four-bar mechanisms (including the frame 801 , the first connecting rod 802 , the second connecting rod 803 and the connecting rod 804 ) are arranged symmetrically in parallel and fixed by the frame 801 at the bottom.

Two transmission rods 805, the fixed ends of which are hinged on the frame 801, preferably, the two transmission rods 805 are designed as arc-shaped rods, which can effectively reduce the tension of the novel seat mechanism 8 of the present invention when it is in the telescopic state. volume of.

Cushion connecting rod 806, one end is vertically connected with cushion support plate 807, the other end is then hinged with the moving ends of two transmission rods 805 through the movable end of spring 812 provided inside it, and near its other end place also with described two The extension ends of the second link rod 803 of the first hinged four-bar mechanism are hinged; the two sides of the cushion connecting rod 806 are also provided with slide grooves, and the movable end of the spring 812 and the movement of the two transmission rods 805 Both ends can reciprocate along the chute.

The baffle plate 809 is located on both sides of the two hinged four-bar mechanisms and the inner side of the baffle plate 809 is also provided with a limit block 810, which is mainly used to prevent the user's legs from colliding with the internal mechanism of the new seat mechanism 8 of the present invention. accidental injury. Simultaneously, the limit block 810 prevents the retractable cushion mechanism 8 from over-extending by blocking the rotation of the first link rod 802 .

The first driving mechanism 811 is movably connected to the supporting body at one end, and hinged at the connecting piece at the lower part of the two transmission rods 805 at the other end, and is used to drive the seat mechanism 8 to expand and contract. Both the first drive mechanism 811 and the second drive mechanism 42 (as shown in Figure 5) are linear drives and preferably use electric push rods or hydraulic push rods. The first drive mechanism 811 drives the connecting piece and simultaneously drives the two transmission rods 805, the two hinged four-bar mechanisms and the seat cushion link 806 rotate, thereby realizing the switching between the stretching and telescoping of the new seat mechanism 8, and further realizing the user's switching between sitting and standing at any time.

Fig. 3(a) to Fig. 3(d) show the specific extension process of the novel seat mechanism 8 of the present invention from the retracted state to the unfolded state.

First, the first driving mechanism 811 drives the seat mechanism 8 of the present invention to extend from the fully retracted state (as shown in Figure 3(a)) to the position of the limit block 810 (as shown in Figure 3(b)), at this time the first continuous The frame rod 802 is blocked by the stop block 810 and limits the extension of the two hinged four-bar mechanisms (that is, the first connecting rod 802, the second connecting rod 803 and the connecting rod 804 all stop rotating), so far the spring 812 has been in a relative position. Relaxed state.

Secondly continue to promote two transmission rods 805 to rotate and compress spring 812, drive two transmission rods 805 mobile ends and spring 812 active ends to rotate along the lower right direction of tangent (as shown in Figure 3 (c)) simultaneously, here spring The function of 812 is to prevent the phenomenon of rotation jamming, specifically to prevent the phenomenon of jamming between the two transmission rods 805 and the seat cushion link 806, and the spring 812 arranged inside the seat cushion link 806 can skillfully avoid the jamming phenomenon occurs, so far the spring 812 has been in a relatively compressed state.

Finally also continue to push the two transmission rods 805 to rotate and make the cushion connecting rod 806 in a vertical state, so that the cushion support plate 807 is in a horizontal state. Jamming occurs between the transmission rod 805 and the seat cushion link 806, and the first driving mechanism 811 also stops driving at this moment, and all the stretching actions of the seat mechanism 8 are completed so far. On the contrary, the process of the seat mechanism 8 returning to the retracted state from the extended state is just opposite to the above-mentioned process.

The novel seat mechanism 8 of the present invention is based on a parallel symmetrical double-hinge four-bar mechanism to skillfully realize the extension and contraction functions of the seat, and has many advantages such as small footprint, simple and compact structure, and easy portability in practical applications.

FIG. 4 and FIG. 5 respectively show a schematic diagram of a standing posture and a sitting posture of a wheelchair 100 provided with the novel seat mechanism 8 . The wheelchair vehicle 100 of the present invention comprises: a chassis running mechanism 1, a fixed support 2, an armrest mechanism 3, an auxiliary standing mechanism (including a waist and abdomen support mechanism 4, a buttock support mechanism 5 and a knee support mechanism 6), a pedal 7 and a The novel seat mechanism 8 of the rear part in the chassis running mechanism 1 . The wheelchair vehicle 100 of the present invention is mainly used by handicapped persons, for example, persons with leg disabilities or lower body paralysis.

The chassis running mechanism 1 is located at the bottom of the wheelchair 100 and is mainly used to carry a user and drive the wheelchair 100 to move forward. The wheelchair 100 includes a base plate 11, a front wheel assembly 12, and a rear wheel assembly 13, wherein the front wheel assembly 12 is a driving wheel, and the rear wheel assembly 13 is a driven wheel and preferably adopts a universal wheel structure.

A front wheel assembly 12 and a rear wheel assembly 13 are respectively arranged at the front and bottom of the bottom plate 11, wherein the front wheel assembly 12 is a driving wheel, and the rear wheel assembly 13 is a driven wheel and preferably uses a universal wheel assembly. The front wheel assembly 12 is also provided with shock-absorbing arms, shock-absorbing slots and shock-absorbing dampers. Similarly, the rear wheel assembly 13 is also provided with corresponding shock-absorbing devices, thereby effectively reducing the vibration generated by the wheelchair 100 during driving. The strength ensures the safety of the user and increases the driving comfort of the user.

Pedal 7 is positioned at the both sides of the middle part of base plate 11, and the front and back of pedal 7 is all provided with annular blocking sheet, prevents the both feet of user from sliding greatly, has played the purpose of fixing user's both feet.

The fixed support 2 is located above the front part of the base plate 11 and is a steel frame structure, and its bottom is fixedly connected to the base plate 11, and mainly plays the role of fixing and movable connection.

The armrest mechanism 3 is located directly above the fixed bracket 2, as shown in Figure 2, its bottom is fixedly connected to the top of the fixed bracket 2 and arranged vertically upwards, mainly including the telescopic rod 31, the handle 32 positioned at the upper end of the telescopic rod 31 and the handle 32 positioned at the upper end of the telescopic rod 31. The second drive mechanism controller 33 at the end of 32. The telescoping rod 31 is a two-stage rod or a multi-stage rod structure, which can be freely retracted and self-locked, and can be adjusted according to the user's height when in use.

The waist and abdomen support mechanism 4 is used to support the user's waist and abdomen, prevent the user from falling forward or backward, and help the user stand stably and achieve long-term standing. The waist and abdomen support mechanism 4 mainly includes a telescopic rod 41 that is movably connected to the upper part of the fixed bracket 2 and the other end is connected to the abdomen support device 43, a waist support pad 44 connected to both sides of the abdomen support device 43, and one end is movable with the chassis walking mechanism 1. It is connected and the other end is movably connected to the second driving mechanism 42 controlled by the second driving mechanism controller 33 with the middle and lower part of the telescopic rod 41 .

An integrated controller 45 for controlling the first drive mechanism 811 , the two third drive mechanisms 53 and the front wheel assembly 12 is also provided on the upper part of the abdomen support device 43 .

The buttock support mechanism 5 is used to support the user's buttocks to prevent the user from standing unsteadily. The buttock support mechanism 5 mainly includes two third drive mechanisms 53 located on both sides of the upper part of the fixed bracket 2, one end of which is respectively connected to the two third drive mechanisms 53, and the other end passes through the hooks 55 located on both sides of the abdomen support device 43 respectively. Two binding straps 51 connected to both sides of the buttock support pad 52 and two connecting straps 54 connected to both sides of the hip support pad 52 and the other end to the knee support mechanism 6 .

The knee support mechanism 6 is used to prevent the user's knee from bending and assist the user's calf to stand stably. The knee support mechanism 6 is located on the fixed bracket and is movably connected with it, thereby realizing synchronous rotation when the user's calf bends, and improving the comfort of the calf support.

Preferably, the structural design of the abdominal support device 43, the waist support pad 44, the hip support pad 52, the knee support mechanism 6 and the pedal 7 should conform to ergonomics and the parts in contact with the user's body are all made of soft shock-absorbing materials, Thereby greatly improving the comfort of the user's abdomen, waist, buttocks, soles and calf or knee support.

When the user needs to switch from a standing posture to a sitting posture, firstly operate the integrated controller 45 to control the first drive mechanism 812 to make the retractable cushion mechanism 8 start to stretch, and when fully stretched, the cushion link 806 is just in a vertical state, and at this time The cushion supporting plate 807 is in a horizontal state, and the function of the seat can be realized by further unfolding the cushion 808 . Then control the second driving mechanism 42 and the third driving mechanism 53 so that the waist and abdomen supporting mechanism 4 and the buttocks supporting mechanism 5 are lowered slowly until the user's buttocks sit on the cushion 808 . Conversely, when the user needs to switch from a sitting position to a standing position, the second drive mechanism 42 and the third drive mechanism 53 should be controlled to slowly raise the waist and abdomen support mechanism 4 and the hip support mechanism 5 until the user is in a standing state. , and then operate the integrated controller 45 to control the first driving mechanism 811 so that the retractable cushion mechanism 8 begins to shrink until the stretching is completed.

To sum up, the user can easily switch between sitting and standing postures by driving the wheelchair 100 of the present invention, and the user can complete daily activities such as cooking, eating, and going to the toilet on the scooter 100, further realizing life. Take care of yourself. The user can repeatedly practice sitting down and standing on the wheelchair vehicle 100 by means of the auxiliary standing mechanism and the seat mechanism, and does simple rehabilitation squat training for the legs. The user can sit down and rest anytime and anywhere according to his or her needs. When the user drives the wheelchair 100 outdoors, the importance of the novel seat mechanism 8 will be fully reflected. Moreover, no matter whether the user sits down to eat or work, he does not need to disengage from the wheelchair, and he does not need to re-wear the hip support pad of the wheelchair when standing after sitting down, which greatly increases the convenience of using the wheelchair. The user can choose to stand and drive the wheelchair, and also can choose to sit and drive the wheelchair. Sitting and standing can be used alternately, so that blood can be circulated, which is more beneficial to the user's body. After the seat is retracted, it takes up little space and will not affect the use of the wheelchair. Finally, the present invention also has the advantages of ingenious design, compact structure, simple operation, safety and stability.

The figures are merely schematic and not drawn to scale. While the invention has been described in connection with preferred embodiments, it should be understood that the scope of the invention is not limited to the embodiments described herein.

Other embodiments of the invention will be apparent to and understood by those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The description and examples are considered exemplary only, with the true scope and spirit of the invention defined by the claims.

Claims (10)

1. a kind of novel seat mechanism, the chair mechanism includes：

Two four-bar linkages, Parallel Symmetric arranges and fixed by the frame of its bottom that the four-bar linkage includes Frame, the first side link, the second side link and connecting rod；

Two drive links, fixing end is hinged in the frame；

One cushion connecting rod, one end is vertically connected with cushions support plate, the other end then by the activity of its internal spring set Hold the mobile terminal with the drive link to be hinged, and be also hinged at its other end with the second side link extended end； The both sides of the cushion connecting rod are additionally provided with chute, and the mobile terminal of the movable end of the spring and the drive link can be along The chute moves reciprocatingly；

Baffle plate, limited block is provided with the inside of described two four-bar linkage both sides and its；

First drive mechanism, one end is movably connected on the supporter of the bottom of the frame, the other end and two drive links The connector of middle and lower part is hinged, for driving the chair mechanism to stretch and shrinking.

2. chair mechanism according to claim 1, it is characterised in that：Two drive links are arc-shaped rod.

3. chair mechanism according to claim 1, it is characterised in that：The both sides of the cushions support plate have been respectively articulated with seat Pad.

4. chair mechanism according to claim 3, it is characterised in that：First drive mechanism is electric power push rod.

5. a kind of wheel-chair provided with novel seat mechanism any one of Claims 1-4, the wheel-chair includes：Chassis Walking mechanism, the handrail for being fixed on positioned at the anterior fixed support of the chassis walking mechanism, bottom the fixed support top Mechanism, aiding upright mechanism, the pedal of both sides and positioned at the chassis vehicle with walking machine in the middle part of the chassis walking mechanism The novel seat mechanism of structure postmedian.

6. wheel-chair according to claim 5, it is characterised in that：The chassis walking mechanism includes bottom plate, is located at respectively The front component and wheel assembly of lower section before and after the bottom plate.

7. wheel-chair according to claim 6, it is characterised in that：The aiding upright mechanism include waist abdomen supporting mechanism, Buttocks supporting mechanism and knee supporting mechanism.

8. wheel-chair according to claim 7, it is characterised in that：The waist abdomen supporting mechanism includes one end and the fixation Frame upper is flexibly connected and the other end is connected with abdominal support device expansion link, it is connected with the abdominal support device both sides Waist protection pad, one end is flexibly connected with the chassis walking mechanism and the other end is flexibly connected with the expansion link middle and lower part Two drive mechanisms.

9. wheel-chair according to claim 8, it is characterised in that：The buttocks supporting mechanism includes being located at the fixed branch Two the 3rd drive mechanisms, buttocks supporting pad, one end of frame top both sides be connected respectively with described two 3rd drive mechanisms and The other end is each passed through two be connected after the hook of the abdominal support device both sides with the buttocks supporting pad both sides Two companies that bundling belt and one end are connected with the buttocks supporting pad both sides and the other end is connected with the knee supporting mechanism Tape splicing.

10. wheel-chair according to claim 9, it is characterised in that：Also include second positioned at the armrest mechanism end Driving mechanisms control device and the integrated manipulator positioned at the abdominal support device top.