JP5065778B2 - Wheelchair footrest mechanism - Google Patents

Description

  The present invention relates to a footrest mechanism attached to the front of a wheelchair having casters and main wheels. More specifically, the present invention relates to a footrest mechanism that prevents a footrest from getting in the way of getting in and out of a wheelchair when the footrest is put on the footrest and a weight is put on the footrest and the weight is applied.

  The footrest is attached to the front part of the wheelchair so as to hold the foot in a stable position when a wheelchair user sits on the wheelchair. Since wheelchairs usually get on and off from the front, the footrests attached to the front get in the way when getting on and off, so when getting on and off the wheelchair, you usually get on and off the footrest on both sides . However, it is very inconvenient for wheelchair users to open the footrests on both sides because they have to be kicked up or bent over with inconvenient feet. Yes.

  The mechanism for moving the footrest up and down in Patent Document 1 has a support tube connected to the wheelchair with an extendable lift legrest assembly for the wheelchair. The first gear member is connected to a support tube, and an expandable strut is a hollow upper strut member pivotally attached to the first gear member, and a lower strut member slidably received by the strut member. And rotates between the raised position and the lowered position around the first gear member. An adjustable footrest assembly is releasably clamped to the lower strut member. The legrest assembly also has a mechanism for extending the footrest relative to a strut that is pivoted toward the raised position.

  The footrest disclosed in Patent Document 1 tries to solve the problems of the conventional extensible legrest by providing a telescoping legrest that is extended by the meshed gear and the link mechanism in response to the rise of the legrest. The footrest is automatically extended when the legrest is raised.

  The mechanism for moving the footrest up and down in Patent Document 2 is provided with a footrest that is connected to be movable up and down by an elevating link mechanism and an operation lever. With this operation lever, the footrest is grounded to the floor or lifted to a fixed position with the user's foot on the floor. The elevating footrest includes a first and a second link that are rotatably provided on a support pipe that is suspended from the pipe frame in front of the front wheel, and a footrest that is rotatably attached to the tips of the first and second links. The footrest is attached to the footrest support base. The second link has an interlocking link extending from the attachment position of the support pipe to the rear wheel side, and is connected to a damper which is a buffering expansion / contraction means.

  As described above, the footrest of Patent Document 2 includes a footrest that is connected to a frame so as to be movable up and down via first and second links, and an operation lever that operates the first and second links. The footrest is grounded to the floor surface by an operation lever or lifted to a fixed position with a user's foot on it.

  The mechanism for moving the footrest up and down in Patent Document 3 can be slid on the frame by combining a dry dry bearing and a dry slide bearing. I try to up.

  The footrest disclosed in Patent Document 3 is devised for the purpose of grounding a foot in an optimal place to stand up from a wheelchair without squatting or lifting a leg by pulling a wire while the foot is placed on a footrest. It is a thing.

  The mechanism for moving the footrest up and down in Patent Document 4 is a leg pipe that can be pivoted through an upper link and a lower link that are pivotably installed on the body frame of the wheelchair. The dimension between the two pivot axes of the leg pipe is 0.7 to 1.4 times, and the dimension between the two pivot axes of the upper link is 0.2 to 0. The footrest device is installed so that it can be raised and lowered by increasing the distance between the two rotation axes of the lower link by 0.5 times to 1.2 times.

As described above, various mechanisms for raising and lowering the footrest have been studied. However, each time the occupant gets on and off the wheelchair, the footrest must be raised or lowered by operating the operation lever or the like to operate the footrest getting on and off mechanism. The posture of a seated person using a wheelchair is not constant depending on the state of illness. Therefore, there is a problem that the operation lever installed at a specific position is difficult to operate because the position of the operation lever is reversed when getting on the wheelchair and when getting off the wheelchair. The appearance of a lifting mechanism for a footrest that is easy to operate or does not need to be operated is desired.
JP 07-96006 A (summary) JP 2002-219147 A Japanese Patent Laid-Open No. 2005-118099 JP 2005-152559 A

  The present invention has been made in view of the above facts, and when a wheelchair user gets on and off the wheelchair, the user can easily get on and off the front of the wheelchair by raising and lowering the footrest without opening and closing the footrest. A footrest mechanism that can be used is provided.

  The footrest, which is a footrest mounted on the front of the wheelchair, is an obstacle when getting in and out of the wheelchair, so users and caregivers can kick it up with their feet or open it on both sides with their hands. Get on and off the wheelchair with the front open. In order to provide a means for easily getting on and off the wheelchair without doing such an inconvenience, as a result of extensive research, the vertical frame of the footrest is made elastic and a footrest is attached to the lower end of the frame. The above problem was solved.

  The first feature of the present invention has a footrest and a rotatable caster for placing and stabilizing a foot on the front part of a wheelchair, a seat part and a main wheel at the rear part of the rotatable caster, A wheelchair having an armrest attached to an upper portion of the seat portion, wherein a vertical frame of the footrest of the wheelchair is composed of an outer pipe and an inner pipe, and a spring member is inserted into the inner pipe, The footrest mechanism is characterized in that the inner pipe can be expanded and contracted, a footrest is attached to the lower end portion of the inner pipe, and the footrest can be raised and lowered.

  A footrest that is placed on the front for stabilization, a rotatable caster, a seat and a main wheel at the rear of the rotatable caster, and an armrest attached to the top of the seat A wheelchair having main wheels, wherein a vertical frame of the footrest of the wheelchair is an inner frame and an outer frame, and a spring member is interposed between the inner frame and the outer frame so as to be slidable vertically. A footrest is attached to the section so that the footrest can be moved up and down. The strength of the spring member used here is appropriately selected according to the weight of the person sitting on the wheelchair.

  The second feature of the present invention includes a footrest for placing and stabilizing a foot on the front part of a wheelchair, a rotatable caster, a seat part and a main wheel at the rear part of the rotatable caster, A wheelchair having an armrest attached to an upper portion of the seat, wherein a vertical frame of the footrest of the wheelchair is composed of an outer pipe and an inner pipe, and an elastic member is inserted into the inner pipe, The footrest mechanism is characterized in that the inner pipe can be extended and retracted, and a footrest is attached to a lower end portion of the inner pipe that can be expanded and contracted by inserting the expansion and contraction member so that the footrest can be moved up and down. .

  A commercially available expansion / contraction member is inserted into the inner pipe of the vertical frame, and the inner pipe is slidably inserted into the outer pipe to make the inner pipe extendable. When a footrest is attached to the lower end of the extendable inner pipe, when the occupant puts his / her weight on the footrest when getting on / off, the footrest descends, making it easier to ride on the wheelchair. When sitting on a wheelchair and the weight shifts to the seat, the footrest rises and the foot can be stably placed. Also, when you get off, if you put your foot on the footrest and put your weight on it, the footrest will drop, so you can get off the wheelchair while stepping on the footrest.

  The third feature of the present invention is that the vertical frame of the footrest is composed of an outer pipe and an inner pipe, and an elastic member is inserted into the inner pipe in the outer pipe to make it extendable and retractable. A footrest is attached to a lower end portion of the inner pipe, a brake wire for fixing a main wheel is connected to an upper end portion of the inner pipe to which the expansion member is inserted, and the expansion and contraction of the inner pipe to which the expansion member is inserted The footrest mechanism according to claim 1, wherein the brake is interlocked.

  By tying the brake wire of the main wheel to the upper part of the inner pipe, when the inner pipe descends by stepping on the footrest, the brake wire is pulled and the main wheel is braked. When the footrest is lowered, you can forget to apply the brake when getting on and off the wheelchair, and the risk of the wheelchair suddenly starting and falling can be prevented.

  According to a fourth aspect of the present invention, the vertical frame of the footrest includes an outer pipe and an inner pipe which can be expanded and contracted by inserting an expansion / contraction member, and locks expansion / contraction of the inner pipe having the expansion / contraction member inserted thereto. A stopper is attached to the side of the inner pipe, and an operation lever connected by a wire from the locking part is attached to the lower part of the armrest to lock the expansion / contraction of the inner pipe with the expansion / contraction member inserted. The footrest mechanism according to claim 1 or 2, wherein the footrest mechanism is provided.

  Install the footrest on the inner pipe of the vertical frame of the footrest, move it up and down in conjunction with the vertical movement of the inner pipe, and attach the locking part that locks the vertical movement of this inner pipe on the side of the elastic member The wire was connected to the operating lever attached to the lower part of the armrest with a wire. When the inner pipe is unlocked by the operation lever attached to the lower part of the armrest and the footrest is stepped on, the footrest is lowered together with the inner pipe to widen the foot, and the wheelchair can be easily boarded / exited.

  The fifth feature of the present invention is that the vertical frame of the footrest is composed of an inner pipe which is made to be extendable and retractable by inserting an outer pipe and an elastic member, and locks the expansion and contraction of the inner pipe to which the elastic member is inserted. A stopper is attached to the side surface of the inner pipe, and the upper pipe of the inner pipe into which the expansion / contraction member is inserted is connected to the brake of the main wheel with a wire, and the expansion / contraction locking operation of the inner pipe with the expansion / contraction member inserted is performed. The footrest mechanism according to claim 1, wherein the brake operation of the main wheel and the main wheel are interlocked.

  Install the footrest on the inner pipe of the vertical frame of the footrest, move it up and down in conjunction with the vertical movement of the inner pipe, and attach the locking part that locks the vertical movement of this inner pipe on the side of the elastic member The wire was connected to the operating lever attached to the lower part of the armrest with a wire. Furthermore, the upper end of the inner pipe was connected to the brake part of the main wheel with a wire, and the inner pipe linked the upper and lower and the brake of the main wheel. The inner pipe is unlocked by the operating lever attached to the lower part of the armrest, and when the footrest is stepped on, the footrest descends together with the inner pipe and the foot widens, while the main wheel is braked and safe. You can get on and off the wheelchair in the state.

  According to a sixth aspect of the present invention, the vertical frame of the footrest includes an outer pipe and an inner pipe which can be expanded and contracted by inserting an elastic member, and the engagement of the expansion and contraction of the inner pipe having the elastic member inserted thereto. A stop is attached to the side surface of the inner pipe, and is connected to an operation lever attached to the lower end of the armrest that is rotatable with the locking portion from the rear of the wheelchair, and further, the telescopic member is inserted. 2. An extension operation of an inner pipe connected with a wire from an upper end portion of an inner pipe to a brake of a main wheel by a wire, and the extension member is inserted, and a brake operation of the main wheel are interlocked. The footrest mechanism according to any one of Items 2 above.

  The vertical frame of the footrest consists of an outer pipe and an inner pipe, and a locking part that locks the inner pipe is attached to the side surface of the elastic member, and the locking part is attached to an operation lever that is attached to the lower part of the armrest. When connecting, the wire connected to the locking part was turned to the rear part of the wheelchair and connected to the operation lever attached to the lower end part of the pivotable armrest. A footrest mechanism that can be raised and lowered is attached to a rotatable armrest.

  The seventh feature of the present invention is that the vertical frame of the footrest is composed of an inner pipe which is made to be stretchable by inserting an outer pipe and an elastic member, and the elastic member to be attached to the inner pipe is a spring-type elastic member. It is a footrest mechanism in any one of Claims 2-6 characterized by the above-mentioned.

  The footrest mechanism according to claim 1 or 3, wherein the vertical frame of the footrest includes an outer pipe and an inner pipe, and the elastic member inserted into the inner pipe is a spring-type elastic member. It is. A commercially available elastic member using a spring can also be used as the elastic member used here.

  The eighth feature of the present invention is that the vertical frame of the footrest is composed of an inner pipe in which an outer pipe and an expansion / contraction member are inserted to expand / contract, and the expansion / contraction member inserted into the inner pipe is a compressed air type expansion / contraction member. It is a footrest mechanism in any one of Claims 2-6 characterized by the above-mentioned. A commercially available gas spring using gas can also be used as the elastic member used here.

  According to a ninth feature of the present invention, the vertical frame of the footrest is composed of an inner pipe that can be stretched by inserting an outer pipe and a stretchable member, and the stretchable member that is fitted to the inner pipe is a hydraulic stretchable member. It is a footrest mechanism in any one of Claims 2-6 characterized by the above-mentioned. A commercially available oil spring using oil can also be used as the elastic member used here.

  Insert a telescopic member in the vertical frame of the footrest of the wheelchair so that it can slide up and down, and when the occupant puts his / her foot on and gets weight, the footrest descends and sits on the wheelchair and the weight on the seat If it moves, a footrest will raise and it can place a foot stably. When getting in and out of a wheelchair, the user and the caregiver do not have to open the footrest on both sides, making it easier to get on and off.

  A telescopic member is attached to the inner pipe of the vertical frame of the footrest to make it extendable, and by connecting a brake wire that fixes the main wheel to the upper end of the inner pipe, when the foot rests on the footrest, the footrest falls and the wire is pulled The brake presses the main wheel to fix the wheelchair. Occurrence of an unexpected accident such as sudden movement of a wheelchair due to forgetting to apply a brake or the like can be prevented.

  By attaching a locking mechanism to the inner pipe fitted with an elastic member, the footrest attached to the lower end of the inner pipe can be fixed in a state where it is lowered or fixed in a state where it is raised up . Even if you put your foot on the footrest in a wheelchair, it will not go down and you can rest your foot on the footrest with confidence. Also, when connecting the locking part that locks the expansion and contraction of the inner pipe with the elastic member and the operation lever with a wire, turn the connecting wire to the operation lever attached to the lower part of the armrest by turning the rear part of the wheelchair. By connecting, it can also be attached to a pivotable armrest that can be freely opened and closed.

   FIG. 1 shows a footrest 11 for placing a foot on the front of a wheelchair 10 for stabilization, a rotatable caster 14, and a seat 16 with a backrest 17 attached to the rear of the rotatable caster 14. A wheelchair 10 having an armrest 13 at the upper part on both sides of the seat 16 and a main wheel 15 at the lower part on both sides of the seat 16 is shown. The vertical frame 12 of the footrest 11 of the wheelchair 10 includes an outer pipe 18 and an inner pipe 19, and the inner pipe 19 into which the spring member 20 or the elastic member 21 is inserted is inserted into the outer pipe 19 so that the inner pipe 19 can be extended and contracted. The wheelchair 10 is shown in which the footrest 11 is attached to the lower end of the telescopic inner pipe 19 and the footrest mechanism 100 of the present invention that is telescopic is mounted.

  In FIG. 2, the vertical frame 12 includes an outer pipe 18 and an inner pipe 19, and the footrest 11 is attached to the lower end portion of the inner pipe 19. A spring member 20 was inserted under the inner pipe 19 inserted into the outer pipe 18, and the inner pipe 19 was moved up and down by the spring member 20 in the outer pipe 18. A footrest mechanism 100 is shown in which a spring member 20 is directly inserted into the vertical frame 12 of the footrest 11 as an elastic member so that the inner pipe 19 of the vertical frame 12 can expand and contract.

  In FIG. 3, the vertical frame 12 of the footrest is composed of an outer pipe 18 and an inner pipe 19 fitted with an elastic member 21, and the footrest 11 is attached to the lower end of the inner pipe 19 which is made elastic by attaching the elastic member 21. The footrest mechanism 100 of the present invention is shown in which the upper end of the inner pipe 19 provided with the elastic member 21 and the brake 22 for fixing the main wheel 15 are connected by a wire 23. By connecting the brake 22 for fixing the main wheel and the footrest mechanism 100 of the present invention with the wire 23, when the footrest 11 is stepped on, the telescopic inner pipe 19 is lowered, and the wire 23 tied to the upper end of the inner pipe 19. Is pulled, and the brake 22 operates to fix the main wheel 15. Forgetting to apply the brake 22 when getting on and off the wheelchair, preventing the accident that the wheelchair suddenly starts moving and falls.

  FIG. 4 shows the footrest mechanism 100 of the present invention in which the inner pipe 19 having the elastic member 21 inserted is inserted into the outer pipe 18 of the vertical frame 12 and the footrest 11 is attached to the lower end of the inner pipe 19. . The expansion / contraction member 21 to be inserted here may be the expansion / contraction member 21 using a spring or the expansion / contraction member 21 using gas pressure or hydraulic pressure, and when the weight is applied to the footrest 11, the inner pipe 19 The type of the elastic member 21 is not particularly limited.

  FIG. 5 illustrates a frame of the footrest 11 in which the frame of the footrest 11 attached to the footrest mechanism 100 of the present invention is formed of one frame. When the footrest 11 is used, a plastic tread with a non-slip attached is used on one frame 11a. A hinge 11b is attached to one end of the frame 11a of the footrest 11 so that the footrest frame 11a can be opened and closed, and a latch 11c that receives the frame 11a of the footrest 11 is attached to the other end to fix the footrest 11. When the frame 11a of the footrest 11 is a single footboard, the footrest 11 has an advantage that the footrest 11 is lowered only by putting one foot on it. Compared to the footrest 11 divided into two left and right, the left and right footrests 11 are Eliminates the hassle of raising and lowering one by one.

  FIG. 6 shows the footrest 11 from the front of the footrest 11 on which a footrest frame 11a is formed by using a single footboard. One end 11c of the frame 11a of the footrest 11 is pivotally attached by a hinge 11b so as to be freely opened and closed. FIG. 6 shows an example in which the other end of the frame 11a of the footrest 11 is fixed by receiving a metal fitting 11c for receiving and supporting the footrest 11 from below. The sliding collar 26 and the sliding groove 27 will be described with reference to FIG.

  FIG. 7 shows an example in which the footrest 11 of the footrest mechanism 100 of the present invention is composed of two left and right footrests 11. As described above, the footrest 11 may be installed separately from the frame 11a of the footrest 11 and the footboard on which it is placed. Further, as shown in FIG. 7, two footrests 11 or an integrally molded footrest plate may be created and used, and the shape of the footrest 11 is not particularly limited. The end portions of the left and right footrests 11 shown in FIG. 7 are pivotally attached to the left and right by hinges so that the left and right footrests 11 can be opened and closed by lifting the left and right central ends. Can be opened and closed separately or simultaneously.

  FIG. 8 illustrates a component of the footrest mechanism 100 of the present invention and a method of inserting the telescopic member 21 into the vertical frame 12 of the footrest 11. A stopper 24 of the expansion / contraction member 21 is attached to the lower pipe port of the outer pipe 18 of the vertical frame 12, and is firmly fixed with screws 24a. The elastic member 21 is inserted into the inner pipe 19, and the upper pin hole 21 a of the elastic member 21 and the pin hole 21 a of the inner pipe 19 are inserted using the pins 25. Next, the inner pipe 19 with the elastic member 21 inserted is inserted into the outer pipe 18, and the lower portion 21 b of the elastic member 21 is passed through the screw hole 24 b below the stopper 24 attached to the outer pipe 18 with the sliding collar 26. The inner pipe 19 is slidably installed through the sliding groove 27 of the inner pipe 19. The inner pipe 19 can be expanded and contracted vertically within the range of the sliding groove 27.

  FIG. 9 shows a cross-sectional view in which the elastic member 21 is inserted into the inner pipe 19 of the vertical frame 12 and inserted into the outer pipe 18, and the footrest 11 is attached to the lower end of the inner pipe 19. The stopper 24 attached to the tube opening of the outer pipe 18 is firmly fixed to the outer pipe 18 with screws 24a. A sliding collar 26 is used at the lower part of the stopper 24 and is fixed by a nut 26 a through the sliding groove 27 of the inner pipe 19. The inner pipe 19 to which the elastic member 21 fixed by the sliding collar 26 is inserted extends vertically within the range of the sliding groove 27 shown in FIG. 6, 7 or 8, and the footrest 11 of the footrest mechanism 100 moves up and down. Can be made.

  FIG. 10 shows a cross-sectional view of the footrest mechanism 100 of the present invention in which the inner pipe 19 with the elastic member 21 inserted is inserted into the outer pipe 18 of the vertical frame 12 and the footrest 11 is attached to the lower end of the inner pipe 19. ing. The stopper 24 attached to the pipe opening of the outer pipe 18 is fixed with a screw 24a, and the sliding collar 26 penetrates the sliding groove formed in the outer pipe 18 and the inner pipe 19 with a nut 26a. It is fixed.

  FIG. 11 shows a cross-sectional view in which the inner pipe 19 with the elastic member 21 inserted is inserted into the outer pipe 18 of the vertical frame 12 and the footrest 11 is attached to the lower end of the inner pipe 19. FIG. 11 shows a state where the footrest 11 of the footrest mechanism 100 of the present invention is lowered.

  In FIG. 12, the inner pipe 19 with the elastic member 21 inserted is inserted into the outer pipe 18 of the vertical frame 12, and the locking portion 28 that locks the expansion and contraction of the inner pipe 19 with the elastic member 21 inserted is used as the outer pipe. 19 shows a wheelchair that is attached to a side face of 19 and connected to a grip-type operation lever 29 that is attached to a lower portion of an armrest 13 by a wire 23a. When the grip-type operation lever 29 is gripped for the first time (first time), the inner pipe 19 is unlocked, and a foot is placed on the footrest 11 and a weight is applied, and an elastic member is inserted. The inner pipe 19 descends. When the footrest 11 is in a grounded state or when the operation lever 29 is released at an arbitrary height, the inner pipe 19 into which the elastic member is inserted is fixed. When the operation lever 29 is gripped again (second time), the locking is released and the inner pipe 19 with the telescopic member inserted contracts, the footrest 11 rises, and when the operation lever 29 is released at an arbitrary position, the position is reached. The footrest 11 is fixed. The operation lever 29 is a two-step operation, and an operation for fixing the footrest is performed during the operation to prevent an unexpected accident.

  In FIG. 13, the inner pipe 19 with the expansion / contraction member 21 inserted is inserted into the outer pipe 18 of the vertical frame 12, and the locking member 28 for locking the expansion / contraction of the inner pipe 18 with the expansion / contraction member 21 is attached to the outer pipe 19. An example of wearing on the side surface is shown. The locking member 28 attached to the side surface of the outer pipe 18 has a fixing portion 28a attached to the side surface of the outer pipe 18 as shown in FIG. Next, as shown in (13-2) of FIG. 13, the engagement fixing portion 28d of the pressing portion 28b biased by the spring 28c connected to the wire 23 is engaged and fixed to the fixing portion 28a. The wire 23 is connected to an operation lever 29 attached to the lower part of the armrest 13.

  FIG. 14 shows a mechanism for inserting the inner pipe 19 with the expansion / contraction member 21 inserted into the outer pipe 18 of the vertical frame 12 and locking the expansion / contraction of the inner pipe 19 with the expansion / contraction member 21 inserted into the side surface of the outer pipe 18. A stop member 28 is attached and connected to a grip-type operation lever 29 attached to the lower portion of the armrest 13 by a wire 23a, and a wire 23b is attached to an engaging portion 31 at the upper end portion of the inner pipe 19 to which the elastic member 21 is inserted. A wheelchair connected to the brake part 30 of the main wheel is shown. When the telescopic member 21 is extended and the wire 23b is pulled, the brake is applied to the main wheel, the footrest 11 is lowered, and when the occupant gets on and off, the wheelchair is locked by the brake 30, so You can get on and off. Although the brake of the main wheel of the wheelchair connected to the footrest mechanism of the present invention uses a drum brake, other disc brakes may be used.

  FIG. 15 shows that a locking member 28 that locks expansion / contraction of the inner pipe 19 with the expansion / contraction member 21 inserted into the outer pipe 18 of the vertical frame 12 is attached to the side surface of the outer pipe 19 and connected to the wire 23a. The wire 23a was turned rearward along the side of the wheelchair, and the wire 23a was connected to the grip-type operation lever 29 attached to the lower part of the flip-up armrest 13 from the rear of the wheelchair. Furthermore, the wheelchair which has the flip-up-type armrest connected to the brake part 30 of the main wheel with the wire 23b from the upper end part of the inner pipe 19 which equipped with the expansion-contraction member 21 is shown.

It is a perspective view of a wheelchair. Sectional drawing of the footrest mechanism part using a spring member is shown. Sectional drawing of a footrest mechanism and the side view of the wheelchair which installed it. A sectional view of the footrest mechanism and a partial side view in which the inner pipe of the vertical pipe and the tire brake are connected by a wire are shown. The perspective view of the footrest which consists of one frame is shown. The front view of the opening-and-closing state of the footrest which consists of one frame is shown. The front view of the opening-and-closing state of the footrest which consists of two boards is shown. The side view of each component which shows the relationship between the outer pipe of the vertical frame of a footrest, an expansion-contraction member, and an inner pipe is shown. The fragmentary sectional view which inserted the elastic member in the vertical frame is shown. The fragmentary sectional view which inserted and fixed the elastic member to the vertical frame is shown. The fragmentary sectional view which inserted the elastic member in the vertical frame and lowered the footrest is shown. The side view of the wheelchair connected with the grip type operation part which installed the latching | locking part in the side surface of the inner pipe and was installed in the lower part of the armrest with the wire is shown. The side view of the installation method of a latching | locking part is shown. Side view of a wheelchair where a locking part is attached to the side of the inner pipe and connected to a grip type operation part attached to the lower part of the armrest with a wire, and connected to the brake of the main wheel with a wire from the upper end of the inner pipe Indicates. A latching part is attached to the side of the inner pipe and connected to a grip-type operation part attached to the lower part of the armrest with a wire, and a flip-up type connected to the brake part of the main wheel with a wire from the upper end of the inner pipe Fig. 2 shows a side view of a wheelchair with an armrest.

Explanation of symbols

100: footrest mechanism 10: wheelchair 11: footrest 12: vertical frame 13: armrest 14: caster 15: main wheel 16: seat 17: backrest 18: outer pipe 19: inner pipe 20: spring member 21: telescopic member 22: brake 23: Wire 24: Stopper 25: Pin 26: Sliding collar 27: Sliding 28: Locking portion 29: Operation lever 30: Main wheel brake portion

Claims (9)

A footrest to stabilize by placing the foot on the front of the wheelchair, and rotatable caster, a wheelchair which have a a seat and main wheels at the rear of the pivoting freely caster, of the vehicle chair The vertical frame of the footrest consists of an outer pipe and an inner pipe, a spring member is inserted into the inner pipe, the inner pipe can be slid within the outer pipe, and a footrest is attached to the lower end of the inner pipe The footrest mechanism
In order to stably place the foot on the footrest, the vertical frame is configured to be stretchable so that when the weight is applied to the footrest, the footrest is lowered, and when the weight is moved from the footrest, the footrest is raised. footrest mechanism, characterized in that is. A footrest to stabilize by placing the foot on the front of the wheelchair, and rotatable caster, a wheelchair which have a a seat and main wheels at the rear of the pivoting freely caster, of the vehicle chair vertical frame of the footrest is more the outer pipe and the inner pipe, wherein by inserting the elastic member into the inner pipe, wherein a slidable said inner pipe within the outer pipe, the inner pipe is inserted the elastic member A footrest mechanism with a footrest attached to the lower end of the
In order to stably place the foot on the footrest, the vertical frame is configured to be stretchable so that when the weight is applied to the footrest, the footrest is lowered, and when the weight is moved from the footrest, the footrest is raised. footrest mechanism, characterized in that is. 3. The footrest mechanism according to claim 1, wherein when the inner pipe is lowered by stepping on the footrest, a brake wire connected to the inner pipe is pulled to brake the main wheel. And clamped by a locking portion for locking the sliding of the front Symbol inner pipe on the side surface of the inner pipe, the sliding of the front Symbol inner pipe to lock operation, connected by a wire from the locking portion The footrest mechanism according to any one of claims 1 to 3, wherein an operation lever is attached to a lower portion of the armrest. Wherein the locking portion for locking the sliding of the inner pipe is clamped by the side surface of the inner pipe, the connected from the upper end of Lee N'napaipu the brake of the main wheels in the wire, the sliding of the front Symbol inner pipe The footrest mechanism according to any one of claims 1 to 3, wherein a locking operation and a brake operation of the main wheel are interlocked. Wherein the locking portion for locking the sliding of the inner pipe is clamped by the side surface of the inner pipe, and the locking portion, connects the operating lever which is clamped by the lower end of the armrest in the wire from the back of the wheelchair further, claim 1 of the upper end of the front Symbol inner pipe connected by wire to the brake of the main wheel, the locking operation and braking operation of the main wheel of the sliding of the i N'napaipu characterized in that the interlocked 4. The footrest mechanism according to any one of items 1 to 3 . Footrest mechanism according to claim 2, elastic members inserted before Symbol inner pipe characterized in that it is a telescopic member of the spring type. Footrest mechanism according to claim 2, elastic members inserted before Symbol inner pipe characterized in that it is a telescopic member of the pneumatic or hydraulic. A wheelchair provided with the footrest mechanism according to any one of claims 1 to 8.

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