TWI577363B - Folding wheelchair - Google Patents

Description

Folding wheelchair

The present invention relates to a mobile assistive device, and more particularly to a folding wheelchair.

Referring to Figures 1 and 2, there is known a folding wheelchair 1 (European Invention Patent Publication No. 0344492 B1) comprising a pair of side frames 11 spaced apart and a movable frame 12 interposed between the side frames 11. Each of the side frames 11 has a top rod 111 extending from the rear toward the front, and two positioning blocks 112 respectively disposed on each of the top rods 111. The active frame 12 has two main rods 121 that can respectively abut against the top of the positioning blocks 112.

Since the main rods 121 of the movable frame 12 of the folding wheelchair 1 are respectively disposed at the top of the positioning blocks 112, that is, the folding wheelchair 1 may have no height due to the positioning blocks 112. Can avoid a higher center of gravity.

In addition, since each of the ejector pins 111 of each side frame 11 and each of the main rods 121 of the movable frame 12 can cooperate with two of the positioning blocks 112 to define a gap 13, when the user is When such a folding wheelchair 1 is operated, there is substantially a disadvantage that it is easy to handle the hand due to careless handling. Therefore, such a folding wheelchair 1 also has an unsafe defect in use.

Accordingly, it is an object of the present invention to provide a folding wheelchair that can reduce the center of gravity and is more secure.

The folding wheelchair of the present invention thus includes a support unit.

The support unit includes a first side frame and a second side frame disposed at intervals, and a movable skeleton interposed between the first and second side frames.

The first and second side frames respectively have a front end, a rear end, a ram between the front and rear ends, a lower pivot portion located below the ejector pin, and an arbor and a lower pivot a central portion between the portions, and a receiving groove recessed from the ejector pin and extending from the rear end toward the front end. The rams each have a fiber reinforced composite material.

The active skeleton enables the first and second side frames to be changed between a use state and a folded state. The movable skeleton has a first frame body and a second frame body, a first linkage rod, and a second linkage rod.

The first frame has a first main rod that can abut against the receiving groove of the first side frame in the use state, and a first main rod extending from the first main rod and pivoted to the second side frame a first follower rod of the lower pivot portion; the second frame body has a second main rod that can abut the receiving groove of the second side frame in the use state, and a second main rod a second follower rod extending and pivotally connected to the lower pivot of the first side frame. The first and second follower rods are pivotally connected to each other in a scissor shape, and the two ends of the first linkage rod are respectively pivotally connected to the central portion of the first side frame and the first driven rod, and the second linkage rod Both ends are pivoted The central portion of the second side frame and the second follower rod.

The effect of the folding wheelchair of the present invention is that the first main rod of the first frame is abutted against the receiving groove of the first side frame, and the second main rod of the second frame is abutted against The design of the receiving groove of the second side frame can thereby help to lower the overall center of gravity of the present invention and is more secure.

2‧‧‧First side frame

21‧‧‧ front end

22‧‧‧ Backend

23‧‧‧Pole

231‧‧‧ Storage trough

232‧‧‧ peripheral wall

233‧‧‧ bottom wall

24‧‧‧ Front pole

25‧‧‧ bottom pole

26‧‧‧ main frame pole

261‧‧‧The lower arm

262‧‧‧Central Department

3‧‧‧Second side frame

31‧‧‧ front end

32‧‧‧ Backend

33‧‧‧Pole

331‧‧‧ Storage trough

332‧‧‧ peripheral wall

333‧‧‧ bottom wall

34‧‧‧ Front pole

35‧‧‧ bottom pole

36‧‧‧ main frame pole

361‧‧‧ lower arm

362‧‧‧Central Department

4‧‧‧ activity skeleton

41‧‧‧First body

411‧‧‧first main pole

412‧‧‧First follower

42‧‧‧Second body

421‧‧‧Second main pole

422‧‧‧Second follower

43‧‧‧First linkage rod

44‧‧‧Second linkage

5‧‧‧Clamping parts

91‧‧‧Support unit

92‧‧‧ front wheel

93‧‧‧Main runner

94‧‧‧Seat unit

95‧‧‧ pedal

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a front view illustrating a conventional folding wheelchair; FIG. 2 is a left side view illustrating a conventional folding wheelchair A top rod, a main rod and two positioning blocks cooperate with each other to define a gap; FIG. 3 is a perspective view illustrating an embodiment of the folding wheelchair of the present invention; and FIG. 4 is a perspective view illustrating a state of use of the embodiment. Figure 5 is a partial plan view of the omitting seat and the main runner, illustrating that a first follower lever of the embodiment extends from a first main lever to a lower pivot portion of a second side frame, and a second The driven rod is a lower pivot extending from a second main rod to a first side frame; FIG. 6 is a partial front view of the omitted seat and the main rotating wheel, illustrating the first and second slaves of the embodiment The moving rods are pivotally connected to each other in a scissors shape; FIG. 7 is a cross-sectional view showing the direction of the VII-VII cut surface line of FIG. 3; and FIG. 8 is a cross-sectional view showing the direction along the line VIII-VIII of FIG. 3; Figure 9 is a front elevational view showing a folded state of the embodiment.

Referring to FIG. 3, FIG. 5 and FIG. 6, an embodiment of the folding wheelchair of the present invention comprises a supporting unit 91, a pair of front guiding wheels 92 respectively disposed on the supporting unit 91, and two shafts respectively disposed on the two sides of the supporting unit 91. The main runner 93 and a seat unit 94 connected to the support unit 91.

The support unit 91 includes a first side frame 2 and a second side frame 3 disposed at intervals, and a movable frame 4 interposed between the first and second side frames 2, 3. In the present embodiment, the movable frame 4 enables the first and second side frames 2, 3 to be changed between a use state (as shown in FIG. 4) and a folded state (as shown in FIG. 9).

The first side frame 2 has a front end 21, a rear end 22, a ram 23 between the front and rear ends 21, 22, a recess from the ram 23 and downward from the rear end 22 a receiving groove 231 extending in the direction of the front end 21, a front rod 24 extending from the ram 23 toward the front end 21, a bottom rod 25 located below the ram 23, and a connecting the ram 23 and the bottom rod The main frame lever 26 of 25. The ejector pin 23 of the first side frame 2 has a peripheral wall 232 and a bottom wall 233 defining the receiving slot 231. As shown in FIG. 7, the receiving slot 231 of the first side frame 2 faces upward and upward. The second side frame 3 is open.

The second side frame 3 has a front end 31, a rear end 32, a ram 33 between the front and rear ends 31, 32, a recess from the ram 33 and from the rear end 32 a receiving groove 331 extending in a direction of the front end 31, a front rod 34 extending from the ejector rod 33 toward the front end 31, a bottom rod 35 located below the ejector rod 33, and a connecting the top rod 33 and the bottom rod Main frame lever 36 of 35. The ram 33 of the second side frame 3 has a defining groove A peripheral wall 332 and a bottom wall 333 of the 331 are as shown in FIG. 8, and the receiving groove 331 of the second side frame 3 is open upward and toward the first side frame 2.

It is added here that the ejector pins 23, 33 each have a Fiber Reinforced Composite Material.

In this embodiment, the first and second side frames 2, 3 are respectively There are a lower pivot portion 261, 361 located below each of the jacks 23, 33, and a central portion 262, 362 between each of the jacks 23, 33 and each of the lower pivot portions 261, 361. In detail, each of the central portions 261, 361 and each of the lower pivot portions 262, 362 are respectively formed on each of the corresponding main frame rods 26, 36. The bottom bars 25, 35 of the first and second side frames 2, 3 respectively extend forward from their corresponding lower pivot portions 261, 361. The main frame rod 26, the ejector rod 23, the front rod 24, and the bottom rod 25 of the first side frame 2 are integrally formed of a fiber reinforced composite material; the main frame rod of the second side frame 3 36. The jack 33, the front rod 34, and the bottom rod 35 are all integrally formed from a fiber reinforced composite material.

The movable frame 4 has a first frame body 41 and a second frame body 42, a first linkage rod 43, and a second linkage rod 44.

The first frame 41 has a first main rod 411 that can abut against the receiving groove 231 of the first side frame 2 in the use state, and a first main rod 411 extends from the first main rod 411 and is pivotally connected thereto. The first follower rod 412 of the lower pivot portion 361 of the second side frame 3. It should be noted that the first main rod 411 and the first driven rod 412 of the first frame body 41 are integrally formed from a fiber reinforced composite material.

The second frame 42 has a capability to abut against the use state a second main rod 421 of the receiving groove 331 of the second side frame 3, and a second driven rod extending from the second main rod 421 and pivotally connected to the lower pivot portion 261 of the first side frame 2 422. It should be noted that the second main rod 421 and the second driven rod 422 of the second frame 42 are integrally formed from a fiber reinforced composite material. In addition, the first and second follower rods 412, 422 are pivotally connected to each other in a scissors shape, as shown in FIG.

The two ends of the first linkage rods are respectively pivotally connected to the central portion 262 of the first side frame 2 and the first driven rod 412. The two ends of the second linkage rod 44 are respectively pivotally connected to the second side. The central portion 362 of the frame 3 and the second follower rod 422. Preferably, the supporting unit 91 further includes a plurality of the first and second main rods 411 and 421 clamped in the receiving grooves 231 and 331 of the first and second side frames 2 and 3, respectively. Clamping member 5.

In the present embodiment, the front guide wheels 92 are respectively disposed on the first and second side frames 2, 3, and more specifically, the front guide wheels 92 are respectively disposed on the bottom rods 25, 35. . The seat unit 94 is flexibly coupled between the first and second main poles 411, 421. In the present embodiment, the folding wheelchair further includes a pedal 95 mounted between the front bars 24, 34.

Referring to FIG. 4, FIG. 7 and FIG. 8, in the state of use, a central axis L1 of the first main rod 411 is lower than a top edge of the peripheral wall 232 of the jack 23 of the first side frame 2, A central axis L2 of the second main rod 421 is lower than a top edge of the peripheral wall 332 of the ram 33 of the second side frame 3. Referring to FIG. 9 , in the folded state, the first main rod 411 is away from the ram 23 of the first side frame 2 , and the second main rod 421 is away from the ejector rod 33 of the second side frame 3 . .

Through the above description, the advantages of the present invention can be further summarized as follows:

The first main rod 411 of the first frame body 41 is abutted against the receiving groove 231 of the first side frame 2, and the second main rod 421 of the second frame body 42 is abutted. By virtue of the design of the receiving groove 331 of the second side frame 3, the positioning blocks 112 used in the conventional folding wheelchair 1 can be used to raise the main rods 121, thereby contributing to the reduction of the overall invention. Focus.

2. The present invention utilizes the design of the fiber reinforced composite materials of the ejector pins 23, 33, so that the present invention can be formed by the first and second main rods 411, 421 by the shape of the material itself. The accommodating grooves 231, 331, and the ejector pins 23, 33 themselves are not only lightweight, but also strong in structure. More preferably, the first and second side frames 2, 3 and the movable frame 4 of the present invention each have a fiber-reinforced composite material, which is also advantageous for overall weight reduction.

3. Since each of the receiving slots 231, 331 of the present invention is defined by the peripheral walls 232, 332 and the bottom walls 233, 333, when the first and second main rods 411, 421 are positioned in the receiving slots In the case of 231, 331, the present invention does not have the gap 13 as described in the conventional folding wheelchair 1, that is, the present invention can avoid the disadvantages of the conventional grip, thereby improving the safety in use.

In summary, the folding wheelchair of the present invention can not only reduce the overall center of gravity, but also improve the safety in use, so that the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and the simple equivalent changes and modifications made by the scope of the patent application and the patent specification of the present invention are It is still within the scope of the invention patent.

2‧‧‧First side frame

23‧‧‧Pole

231‧‧‧ Storage trough

24‧‧‧ Front pole

25‧‧‧ bottom pole

26‧‧‧ main frame pole

261‧‧‧The lower arm

262‧‧‧Central Department

3‧‧‧Second side frame

33‧‧‧Pole

331‧‧‧ Storage trough

34‧‧‧ Front pole

35‧‧‧ bottom pole

36‧‧‧ main frame pole

361‧‧‧ lower arm

362‧‧‧Central Department

4‧‧‧ activity skeleton

411‧‧‧first main pole

421‧‧‧Second main pole

91‧‧‧Support unit

92‧‧‧ front wheel

93‧‧‧Main runner

94‧‧‧Seat unit

95‧‧‧ pedal

Claims (9)

A folding wheelchair includes: a supporting unit, comprising a first side frame and a second side frame disposed at intervals, and a movable frame between the first and second side frames, the movable frame enables the The first and second side frames are changed between a use state and a folded state, and the first and second side frames respectively have a front end, a rear end, a ejector between the front and rear ends, and a a lower pivot portion below the jack, a central portion between the top rod and the lower pivot portion, and a receiving groove extending downward from the top rod and extending from the rear end toward the front end. Each of the ejector pins has a fiber reinforced composite material, the movable frame has a first frame body and a second frame body, a first linkage rod, and a second linkage rod, and the first frame body has a a first main rod that abuts against the receiving groove of the first side frame, and a first driven rod that extends from the first main rod and is pivotally connected to the lower pivot portion of the second side frame The second frame has a second main rod that can abut the receiving groove of the second side frame in the use state, and a second follower rod extending from the second main rod and pivotally connected to the lower pivot portion of the first side frame, the first and second follower rods are pivotally connected to each other in a scissor shape, and the first linkage rod is The two ends are respectively pivotally connected to the central portion of the first side frame and the first driven rod, and the two ends of the second linking rod are respectively pivotally connected to the central portion of the second side frame and the second driven a rod, wherein the ejector rod of the first side frame has a peripheral wall and a bottom wall defining the receiving groove, and the receiving groove of the first side frame faces upward and toward the rod The second side frame is open, in a state of use, a central axis of the first main rod is lower than a top edge of the peripheral wall of the top rod of the first side frame, and the top rod of the second side frame has a defined a peripheral wall and a bottom wall of the receiving groove, the receiving groove of the second side frame is open upward and toward the first side frame, and a central axis of the second main rod is lower than the second in the use state The peripheral edge of the peripheral wall of the ram of the side frame. The folding wheelchair according to claim 1, wherein the supporting unit further comprises a plurality of clips respectively capable of stably setting the first and second main rod clamps in the receiving grooves of the first and second side frames. Hold the piece. The folding wheelchair of claim 1, further comprising a seat unit flexibly coupled between the first and second main poles. The folding wheelchair according to claim 1, further comprising a pair of front guide wheels respectively disposed on the first and second side frames. The folding wheelchair according to claim 4, wherein the first and second side frames each further have a bottom rod extending forward from the lower pivot portion, and the front guide wheels are respectively axially disposed on the bottom rods. The folding wheelchair of claim 5, wherein the first and second side frames each further have a front pole extending from the jack toward the front end, the folding wheelchair further comprising a front axle mounted between the front poles The pedals. The folding wheelchair of claim 6, wherein the first and second side frames further have a main frame rod connecting the top rod and the bottom rod, the central portion of the first and second side frames and The lower pivot portions are respectively formed on the main frame rods of the first and second side frames. The folding wheelchair of claim 7, wherein the first and second side frames The main frame rod, the ejector rod, the front rod and the bottom rod are respectively integrally formed from a fiber reinforced composite material. The folding wheelchair of claim 8, wherein the first main rod and the first driven rod of the first frame are integrally formed of a fiber reinforced composite material, and the second main body of the second frame The rod and the second follower rod are integrally formed from a fiber reinforced composite material.