TWM554789U - Wheel chair - Google Patents

Description

wheelchair

The present invention relates to a mobile aid, and more particularly to a wheelchair.

Referring to Figures 1, 2 and 3, a known wheelchair 1 comprises a frame 11 adapted for a user to ride, a plurality of wheels 12 mounted to the frame 11, and two mounted on the front side of the frame 11. The foot bar 13 and two pedal units 14 respectively mounted on the foot bars 13 and adapted for the user's feet to step on.

Each of the legs 13 defines a plurality of positioning grooves 131 arranged at intervals, each of which extends laterally along an outer surface of the foot bar 13. Each of the pedal units 14 includes a mounting rod 141 that is inserted into each of the foot rods 13, a latch 142 that is mounted to the mounting rod 141, and a foot pedal 143 that is attached to the bottom end of the mounting rod 141. When the pedal units 14 are mounted into the legs 13, the latch 142 is embedded in one of the positioning slots 131.

When the user wants to leave the wheelchair 1, the pedals 143 can slide laterally in the positioning slots 131 through the latches 142, and are respectively disposed away from each other toward the sides of the seat frame 11 for use. The person can easily get up and leave in the space after the footboards 143 are separated.

However, the swinging distance of the footboards 143 is limited by the lateral extension length of the positioning slots 131. When the lateral extending lengths of the positioning slots 131 are too short, the pedals 143 are separated from each other. The amplitude is insufficient, and the user does not easily step on the ground when the user gets up. However, when the lateral extension length of the positioning slots 131 is too long, the mechanical strength of the pedals 13 is lowered, and the service life is not long. In addition, the wheelchair 1 can be placed in the foot rod 13 by pressing the buckle 142 as shown in FIG. 3, and further the mounting rod 141 can be greatly moved in the foot rod 13. Rotation further increases the space created by the foot pedals 143 being separated from each other. However, in addition to the complicated operation process, this design also has the risk of pinching the user's hand. Moreover, when the buckle 142 is completely pressed and folded into the mounting rod 141, the problem that the pedal unit 14 and the foot rod 13 are separated from each other is also easily caused. Moreover, the foot pedal 143 is not restricted in positioning, and can be biased away during use, but when the person kicks the foot pedal 143, the foot pedal 143 swings back and hits the user's ankle. Therefore, the structural design of the wheelchair 1 still needs to be improved.

Accordingly, it is an object of the present invention to provide a wheelchair that overcomes at least one of the disadvantages of the prior art.

Thus, the novel wheelchair includes a chair frame mechanism and two pedal mechanisms. The chair frame mechanism includes a frame body and two foot bars mounted on a front side of the frame body. The pedal mechanisms are respectively mounted on the pedals, and each pedal mechanism is rotatable relative to each of the pedals between a stepping position and a swinging position, and includes a pivoting sleeve that can be vertically displaced and rotated. a pivot unit of the other foot rod, a positioning unit mounted on the outer surface of the respective foot rod and embedded in the pivot unit, and a pedal unit mounted on the pivot unit, the pivot unit having a moving groove extending along the inner circumference thereof for the positioning unit to be slidably embedded with a limit, the moving groove has a laterally extending central groove segment, and a first portion extending upward from both ends of the central groove segment a slot segment and a second slot segment. The pedal mechanism can move up and rotate relative to the foot rod with the pivot unit, and move the positioning unit from the first slot section or the second slot section to the central slot section and along the central slot section, and Between the stepping position and the swinging position, when the stepping position is located, the positioning unit is located in the first slot section, and the pedal unit is positioned on the front side of the chair frame body. When the position is placed off, the positioning unit is located on the second slot section, and the pedal unit is positioned on the side of the seat frame body.

The utility model has the advantages that the pivotable positioning between the positioning unit and the pivot unit enables the pedal mechanisms to swing at a large angle with respect to the pedals, so that the user is more away from the wheelchair. For safety and convenience.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 4, 5 and 6, a first embodiment of the wheelchair 2 of the present invention is suitable for use by a user and includes a chair mechanism 3 and two pedal mechanisms 4.

The orientation that the user faces when riding on the wheelchair 2 is defined as the front side, and the orientation corresponding to the left hand of the user is the left side, and the rest of the orientations are the same. The chair frame mechanism 3 includes a seat frame body 31 suitable for a user to ride, two foot bars 32 spaced apart from each other on the front side of the seat frame body 31, and two left and right sides disposed on the seat frame body 31. A side turning wheel 33, and two auxiliary wheels 34 respectively disposed at the bottom edges of the leg bars 32 for assisting steering. Each of the legs 32 has a perforation 321 extending radially in the left and right.

The pedal mechanisms 4 are respectively mounted on the pedals 32. Each pedal mechanism 4 includes a positioning unit 41, a pivot unit 42, a pedal unit 43, and two bushings 44. In the following description, the pedal mechanism 4 located on the left side of the seat frame body 31 and the foot bar 32 will be described as an example.

The positioning unit 41 of the pedal mechanism 4 is mounted to protrude from the outer surface of the foot bar 32, and has a plug block that is inserted into the foot bar 32 and defines a mounting channel 412 coaxially communicating with the through hole 321 413 , a nut 414 disposed in the leg 32 and connected to the mounting channel 412 , and a through hole 321 inserted into the mounting channel 412 and screwed to the nut 414 The rod body 411 has a head end portion 410 projecting from the outer surface of the foot rod 32.

The pivot unit 42 is pivotally mounted on the foot bar 32 so as to be vertically displaceable and rotatable, and is disposed around the positioning unit 41, and has a concave portion extending along the circumference thereof to be recessed on the inner circumferential surface thereof. The head end portion 410 of the rod body 411 is slidably inserted into the moving groove 423, and two recessed portions are disposed on the inner peripheral surface thereof and are respectively spaced on the upper and lower sides of the moving groove 423 and respectively provided for the bushings 44 limits the limit ring groove 424.

In the first embodiment, the pivot unit 42 includes a first housing 421 and a second housing 422 that are oppositely coupled to each other to the outside of the foot bar 32. The first housing 421 is The second housing 422 cooperates to define the moving slot 423 and the limiting ring slots 424.

The moving slot 423 has a central slot 425 extending transversely of the inner peripheral surface of the first housing 421 and the second housing 422, and a central slot 425 extending upward from one end of the central slot 425 and located at the first A first slot section 426 of a housing 421 and a second slot section 427 extending upwardly from the other end of the central slot section 425 are located in the second housing 422. The central slot section 425 has a first central slot 428 in the first housing 421 and in communication with the first slot section 426, and a second housing 422 in communication with the second slot 427. A second central trough area 429.

Each of the limiting ring grooves 424 has a first limiting slot area 401 disposed in the first housing 421 and a second limiting slot area 402 disposed in the second housing 422. The first limiting position The groove area 401 and the second limit groove area 402 communicate end to end with each other and are combined into an annular groove.

It should be noted that the design of the first housing 421 assembled with the second housing 422 has the advantage of reducing the complexity of mounting the pivot unit 42 to the foot bar 32, however, in the first embodiment In other variations, the pivot unit 42 can also be a single housing structure. The moving slot 423 and the limiting ring slots 424 are formed on the inner side of the pivot unit 42 without being disassembled. The first housing 421 and the second housing 422 are necessary.

The bushings 44 are mounted in the pivot unit 42 at a distance from each other and are sleeved outside the leg 32. Each bushing 44 has a surrounding portion 441 of the foot bar 32, and a peripheral portion of the surrounding portion 441 projects radially outwardly in a ring shape and is embedded in each of the limit ring grooves 424. The limit portion 442. The bushings 44 are provided for the purpose of reducing the wear caused when the pivot unit 42 and the foot bar 32 rotate relative to each other and prolonging the service life of the pivot unit 42. In the first embodiment, the bushings 44 are tightly fitted to the legs 32, and the limiting portions 442 are loosely fitted into the limiting ring grooves 424. In other variations of the first embodiment, the bushings 44 can also be loosely fitted over the legs 32, and the limiting portions 442 are tightly fitted to the limit. In the ring groove 424.

The pedal unit 43 is locked and fixed to the pivot unit 42 and is movable by the pivot unit 42 to move up and down relative to the foot bar 32. The pedal unit 43 has an extension rod 431 extending from an upper and lower arc and having a top end portion locked to the pivot unit 42, and a pivotably pivotally connected to the bottom end of the extension rod 431 for the user's foot. Stepped foot pedal 432.

Referring to Figures 4 and 8, the foot pedal 432 is switchable between a use state and a folded state relative to the extension rod 431. When the foot pedal 432 is in the state of use, it is placed horizontally (as shown in FIG. 4) and can be stepped on by the user's footsteps. When the footrest 432 is in the folded state, it is pivoted toward the extension rod 431 and is placed upright (as shown in FIG. 8), thereby saving the storage space when the wheelchair 2 is housed.

It should be noted that the foot pedal 432 swings and folds relative to the extension rod 431 in a plurality of ways, for example, changing the direction in which the foot pedal 432 pivots, or the foot pedal 432 and the extension rod 431 can be used to each other. The design of the separation and reassembly storage can achieve similar effects, and is not limited to the folding mode of the first embodiment.

Referring to FIG. 4, FIG. 5 and FIG. 7, the pedal mechanism 4 can be moved up and rotated relative to the foot bar 32 by the pivot unit 42 and rotated relative to the foot bar 32 between a stepping position and a swinging position. . In the stepping position, the head end portion 410 of the rod body 411 is restrained in the first slot section 426 of the moving slot 423, and the pedal unit 43 is positioned on the front side of the seat frame body 31. At this time, the user can ride on the seat frame body 31 and place the foot on the foot board 432.

When the pedal mechanism 4 is to be moved from the stepping position to the swinging position, the first step moves the pivot unit 42 upward along the foot bar 32, and the head end portion 410 of the rod body 411 is disengaged downward. The first slot section 426 enters the central slot section 425. The pivot unit 42 is then driven to rotate relative to the foot bar 32 such that the head end portion 410 moves along the central slot segment 425 below the second slot segment 427 as the pivot unit 42 rotates.

Referring to FIG. 5, FIG. 8 and FIG. 9, when the rod body 411 is moved below the second groove section 427, the pivot unit 42 is moved downward relative to the foot rod 32, so that the rod body 411 is relatively moved up and embedded. The second slot section 427 is in the limit position. At this time, the pedal mechanism 4 is located at the swing position relative to the foot lever 32, and the pedal unit 43 is positioned on the side of the seat frame body 31. When the pedal mechanisms 4 located on the left and right sides are located at the swinging position, the user does not get tripped by the extension rod 431 or the foot pedals 432 when they are about to get out of the wheelchair 2, and The pedal unit 43 can be positioned without swinging by the card end limit of the head end portion 410 in the first slot section 426 and the second slot section 427, so that the pedal unit 43 can be prevented from being kicked by, for example, a side person. When the external force is applied back and hits the user's foot, the user can be prevented from kicking the pedal unit 43 away from the stepping position by accidental force, which improves the safety and convenience of the wheelchair 2. When the user wants to move the pedal mechanism 4 back from the swinging position to the stepping position, the above step is only required to reversely operate, that the head end portion 410 of the rod body 411 can be removed from the second slot. The segment 427 returns to the first slot segment 426 and the pedal unit 43 can be repositioned on the front side of the seat frame body 31.

Referring to FIG. 10, the configuration of a second embodiment of the present invention is substantially the same as that of the first embodiment, with the difference that the positioning unit 41 is assembled differently from the foot bar 32. In the second embodiment, the positioning unit 41 does not include the nut, and the internal thread is directly disposed in the mounting channel 412 of the plug block 413. The rod body 411 is directly screwed into the plug block 413. . This design is not necessary to provide the nut, and has the advantages of reducing the structural complexity of the plug 413 and reducing the difficulty in assembly and the material cost required for assembly.

Referring to Figure 11, the construction of a third embodiment of the present invention is substantially the same as that of the second embodiment, with the difference that the positioning unit 41 is assembled differently from the foot bar 32. In the third embodiment, the positioning unit 41 does not include the plug block and the nut, and the rod body 411 is directly screwed on the foot rod 32. The advantage of this design is that the number of components required for assembly is much simpler and easier to assemble.

In summary, the wheelchair 2 of the present invention is designed by the positioning unit 41 and the pivot unit 42 so that the pedal mechanisms 4 can swing at a large angle with respect to the pedals 32, and by the head end The portion 410 of the portion 410 in the first slot segment 426 and the second slot segment 427 can position the pedal unit 43 without swinging, so that the user is safer and more convenient when getting up and leaving the wheelchair 2, and It is quite simple and convenient to operate, so it can achieve the purpose of this new type. The bushings 44 can improve the wear resistance between the pivot unit 42 and the corresponding foot bar 32, and extend the service life of the wheelchair 2. The design of the foot pedal 432 and the extension rod 431 can be folded to make the wheelchair 2 more space-saving when stored.

However, the above is only the embodiment of the present invention. When the scope of the novel implementation cannot be limited thereto, all simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

2‧‧‧ Wheelchair
3‧‧‧ Chair frame mechanism
31‧‧‧ Chair frame body
32‧‧‧foot
321‧‧‧Perforation
33‧‧‧Rotating wheel
34‧‧‧Assistance wheel
4‧‧‧ pedal mechanism
401‧‧‧First limit slot area
402‧‧‧Second limit slot
41‧‧‧ Positioning unit
410‧‧‧ head end
411‧‧‧ rod body
412‧‧‧Installation channel
413‧‧‧ plug
414‧‧‧ Nuts
42‧‧‧ pivot unit
421‧‧‧First housing
422‧‧‧ second housing
423‧‧‧ moving trough
424‧‧‧Limited ring groove
425‧‧‧Central trough section
426‧‧‧First trough section
427‧‧‧Second trough section
428‧‧‧First Central Slot
429‧‧‧Second central trough
43‧‧‧ pedal unit
431‧‧‧Extension rod
432‧‧‧ pedals
44‧‧‧ bushing
441‧‧‧ Surrounding
442‧‧‧Limited

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a partial perspective exploded view of a known wheelchair; Figure 2 is an incomplete perspective view of the wheelchair a pedal unit is mounted on a foot rod, and a spring button of the pedal unit protrudes into a positioning groove of the foot rod, and the pedal unit swings toward a side of a seat frame; FIG. 3 is an incomplete a perspective view illustrating that the buckle of the wheelchair is housed in the foot bar, and the pedal unit continues to swing toward the side of the seat frame; FIG. 4 is a perspective view illustrating a first embodiment of the wheelchair of the present invention, and The two pedal mechanism of the first embodiment is located in a stepping position, and the two-legged pedal of the first embodiment is in a use state; FIG. 5 is an incomplete perspective exploded view illustrating the one foot of the first embodiment, FIG. 6 is an incomplete front cross-sectional view illustrating the foot bar, the pivot unit, and the first embodiment of the pivoting unit, a shaft, a second bushing, and a pedal unit; FIG. The state of a positioning unit at the time of installation; Figure 7 An incomplete partial cross-sectional view of the first embodiment shows that the rod body is located in a first slot section of a moving slot of the pivot unit, and the pedal mechanism is located at the stepping position; FIG. 8 is a A complete perspective view illustrating a view of the first embodiment in another perspective, and the pedal mechanism of the first embodiment is in a swinging position, the foot pedal being in a folded state; FIG. 9 is an incomplete view a partial cross-sectional view showing that the rod body of the first embodiment is located in a second slot section of the moving slot of the pivot unit, and the pedal mechanism is located at the swinging position; FIG. 10 is an incomplete front view. The cross-sectional view illustrates the state of the foot bar and the positioning unit of the second embodiment of the present invention when installed; and FIG. 11 is an incomplete partial front cross-sectional view showing a third embodiment of the wheelchair of the present invention. The foot rod of the example and the positioning unit are in a state of being installed.

2‧‧‧ Wheelchair

3‧‧‧ Chair frame mechanism

31‧‧‧ Chair frame body

32‧‧‧foot

33‧‧‧Rotating wheel

34‧‧‧Assistance wheel

4‧‧‧ pedal mechanism

42‧‧‧ pivot unit

421‧‧‧First housing

422‧‧‧ second housing

43‧‧‧ pedal unit

431‧‧‧Extension rod

432‧‧‧ pedals

Claims (9)

A wheelchair comprising: a chair frame mechanism comprising a frame body and two foot bars mounted on a front side of the frame body; two pedal mechanisms respectively mounted on the foot bars, each pedal mechanism being opposite The respective foot rods are rotationally positioned between a stepping position and a swinging position, and include a pivot unit that can be vertically and rotationally pivoted on the respective foot rods, and a mounting protrusion on the respective foot rods. An outer surface and a positioning unit embedded in the pivot unit, and a pedal unit mounted to the pivot unit, the pivot unit having a step extending along an inner circumference thereof for allowing the positioning unit to slideably a moving slot having a laterally extending central slot segment and a first slot segment and a second slot segment extending upwardly from opposite ends of the central slot segment; the pedal mechanism can be the pivot unit Moving up and rotating relative to the foot rod, moving the positioning unit from the first slot segment or the second slot segment to the central slot segment and displace along the central slot segment, and at the stepping position and the swinging position Change between locations, located When the position is stepped on, the positioning unit is located in the first slot section, and the pedal unit is positioned on the front side of the chair frame body. When the swinging position is located, the positioning unit is upwardly locked. Located in the second slot section, the pedal unit is positioned on the side of the seat frame body. The wheelchair of claim 1, wherein each of the foot rods has a radially penetrating through hole, and the positioning unit has a rod that is inserted and positioned on the through hole and protrudes from the outer surface of the foot rod, the rod Physical energy moves within the moving slot. The wheelchair of claim 2, wherein the positioning unit further has a plug that is plugged into the shaft, the plug defining a mounting channel that communicates the perforation for the rod to be positioned. The wheelchair of claim 3, wherein the positioning unit further has a nut assembled on the plug block and coaxially communicating with the mounting channel, the rod body penetrating into the mounting channel and screwed to The nut. The wheelchair of any one of claims 1 to 4, wherein the pivot unit has a first housing, and one of the first housing is assembled and pivoted on the corresponding leg a second housing defining the first slot segment and a first central slot region in communication with the first slot segment, the second housing defining the second slot segment, and a second slot And a second central trough area communicating with the second trough section, the first central trough area and the second central trough area cooperating to form the central trough section. The wheelchair of claim 1, wherein each pedal mechanism further comprises at least one bushing mounted in the pivot unit and sleeved outside the foot bar. The wheelchair of claim 6, wherein each of the pedal mechanisms further includes two bushings mounted in the pivot unit at intervals. The wheelchair of claim 7, wherein each bushing has a surrounding portion that is looped over the foot bar, and a limiting portion that extends outwardly from an outer circumferential surface of the surrounding portion, the pivoting unit further defining Two limit ring grooves are respectively provided for the limit portions of the bushings to be set. The wheelchair of claim 1, wherein each pedal unit has an extension rod coupled to the pivot unit, and a foot pedal pivotally pivotally coupled to the extension rod away from one end of the pivot unit, Each pedal can be switched between a use state and a folded state with respect to the extension rod. In the use state, the foot pedal is horizontally placed and can be stepped on, and in the folded state, the pedal is The plate is placed against the extension rod and placed upright.