Seat depth adjusting structure and wheelchair

Abstract

The utility model relates to a seat depth adjusting structure of a wheelchair, which comprises a seat plate assembly, the seat plate assembly comprises a front panel, a rear panel, a front frame and a rear frame, the front frame and the rear frame are both U-shaped structures, so that each frame is provided with two side parts, the front frame and the rear frame are oppositely arranged, the side parts of the front frame are inserted into the corresponding side parts of the rear frame, and the rear frame is provided with two side parts. The front frame and the rear frame are assembled to form a square structure, the side portion of the front frame and the side portion of the rear frame are fixed through a first locking structure, after the first locking structure is unlocked, the front frame can move front and back relative to the rear frame, and therefore seat depth adjustment of the seat plate assembly is achieved. The front panel and the rear panel are respectively fixed on the upper sides of the front frame and the rear frame, and when the front frame and the rear frame are spliced to form a square structure, one part of the front panel and one part of the rear panel are overlapped up and down. The seat depth adjusting structure is simple in structure and easy to assemble and operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wheelchair, in particular to a seat depth adjustment structure of wheelchair. BACKGROUND

[0002] Different wheelchair riders may have different requirements for the seat depth of the wheelchair, if the seat depth is too deep, the wheelchair rider sits too far forward relative to the backrest, and the upper body cannot be supported enough, if the seat depth is too shallow, the thigh of the wheelchair rider cannot be supported enough.

[0003] If different seat depths are customized for different seat depth requirements, the cost is too high, and it is not environmentally friendly. A more suitable approach is to design the seat of the wheelchair as a seat depth adjustable structure, which can be adjusted to the appropriate state for different seat depth requirements. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a solution for adjusting the seat depth of a wheelchair.

[0005] To solve the above technical problem, the utility model provides a seat depth adjustment structure, which comprises a seat plate assembly, the seat plate assembly comprises a front panel, a rear panel, a front frame and a rear frame, the front frame and the rear frame are both "U" shaped structures, so that they both have two side parts, the front frame and the rear frame are oppositely arranged, the side part of the front frame is inserted into the corresponding side part of the rear frame, so that the front frame and the rear frame are assembled to form a square structure, the side part of the front frame and the side part of the rear frame are fixed through a first locking structure, after the first locking structure is unlocked, the front frame can move forward and backward relative to the rear frame, so as to realize the seat depth adjustment of the seat plate assembly; the front panel and the rear panel are fixed on the upper sides of the front frame and the rear frame respectively, when the front frame and the rear frame are assembled to form a square structure, a part of the front panel is stacked above a part of the rear panel.

[0006] The seat depth adjustment structure provided by the utility model is simple in structure, easy to assemble and operate, and the seat depth adjustment of the seat plate assembly can be realized through three simple steps of unlocking the first locking structure, pulling out / pushing back the front frame and relocking the first locking structure.

[0007] Preferably, when the front frame and the rear frame are assembled to form a square structure, the front panel is stacked above the rear panel, the upper surface of the rear panel is provided with a plurality of seat depth scale lines, a seat depth value mark is arranged on the rear side of each seat depth scale line, and the seat depth value mark is used for indicating the seat depth value of the seat plate assembly when the rear end face of the front panel is aligned with the corresponding seat depth scale line.

[0008] The side part of the rear frame is provided with a first track matched with the side part of the front frame, and the side part of the front frame is inserted into the corresponding first track, so that the rear frame guides the forward and backward movement of the front frame through the first track.

[0009] The first locking structure includes a first locking block and a first locking bolt. The first locking block has a threaded hole that matches the first locking bolt. The lower side of the front frame has a second track that matches the first locking block. The first locking block is placed in the second track and can move back and forth along the second track. The lower side wall of the second track has a strip-shaped opening corresponding to the threaded hole of the first locking block. The first locking bolt is inserted into the first track from the lower side of the rear frame and is threadedly connected to the first locking block. After tightening the first locking bolt, the side wall of the first track and the first locking block clamp the lower side wall of the second track, thereby fixing the front frame relative to the rear frame.

[0010] Preferably, the seat depth adjustment structure provided by this utility model further includes a backrest assembly, which includes a backrest body and two connecting brackets. The two connecting brackets are respectively fixed to the left and right sides of the rear frame by a second locking structure. After the second locking structure is unlocked, the connecting brackets can move back and forth relative to the rear frame, thereby realizing the adjustment of the backrest assembly relative to the seat plate assembly.

[0011] The second locking assembly includes a second locking bolt and a second locking block. A third track is provided on both the left and right sides of the rear frame. The second locking block is placed within the third track and can move back and forth along it. The second locking block has a threaded hole that matches the second locking bolt. The side wall of the third track facing the connecting bracket has a strip-shaped opening corresponding to the threaded hole of the second locking block. The second locking bolt passes through the connecting bracket and is threadedly connected to the second locking block. After tightening the second locking bolt, the second locking block and the connecting bracket clamp the side wall of the third track with the strip-shaped opening, thereby fixing the connecting bracket relative to the rear frame.

[0012] When the seat depth adjustment of the seat plate assembly reaches its limit, the seat depth can be further reduced by adjusting the backrest assembly forward, so that the seat depth can meet the needs of more extreme users. Attached Figure Description

[0013] Figure 1 This is an exploded view of the structure of a deep adjustment structure according to an embodiment of the present invention;

[0014] Figure 2 for Figure 1 The exploded view of the seat depth adjustment structure from another perspective;

[0015] Figure 3 for Figure 1 A three-dimensional view of the seat depth adjustment structure when the seat depth is 550mm.

[0016] Figure 4 for Figure 1 A three-dimensional view of the seat depth adjustment structure when the seat depth is 400mm.

[0017] Figure 5 forFigure 1 a perspective view of the seat depth adjustment structure when the seat depth is 375mm;

[0018] Figure 6 a perspective view of the wheelchair according to the second embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to facilitate the description of the relative positional relationship between the parts, components and the like, the words "front", "rear", "left", "right", "upper" and "lower" are used herein to indicate the orientation, and these words in indicating the orientation are only to reflect the relative positional relationship between the parts, components and the like. Embodiment One

[0020] Referring to Figure 1 A seat depth adjustment structure includes a seat plate assembly, the seat plate assembly includes a front panel 1, a rear panel 2, a front frame 3 and a rear frame 4, the front frame 3 and the rear frame 4 are both "U" shaped structures, thereby both having two side portions. The "U" shaped structure has a bottom portion and two side portions, and the two side portions are connected to the two ends of the bottom portion, respectively.

[0021] The front frame 3 and the rear frame 4 are oppositely arranged, the side portion of the front frame 3 is inserted into the corresponding side portion of the rear frame 4 from front to back, thereby the front frame 3 and the rear frame 4 are assembled to form a square structure, the side portion of the front frame 3 and the side portion of the rear frame 4 are fixed by a first locking structure, after the first locking structure is unlocked, the front frame 3 can move forward and backward relative to the rear frame 4, the size of the seat plate assembly in the front-rear direction changes, thereby realizing the seat depth adjustment of the seat plate assembly.

[0022] The side portion of the rear frame 4 is provided with a first track 41 matched with the side portion of the front frame 3, the side portion of the front frame 3 is inserted into the corresponding first track 41, thereby the rear frame 4 guides the forward and backward movement of the front frame 3 through the first track 41. The first locking structure includes a first locking block a1 and a first locking bolt a2, the first locking block a1 is provided with a threaded hole matched with the first locking bolt a2, the lower side of the front frame 3 is provided with a second track 31 matched with the first locking block a1, the first locking block a1 is placed in the second track 31 and can move forward and backward along the second track 31, the lower side wall 311 of the second track 31 is provided with a strip-shaped opening 312 corresponding to the threaded hole of the first locking block a1, the first locking bolt a2 is inserted into the first track 41 from the lower side of the rear frame 4 and is threadedly connected with the first locking block a1.

[0023] After the first locking bolt a2 is tightened, the side wall of the first rail 41 clamps the lower side wall 311 of the second rail 31 with the first locking block a1, thereby realizing the fixation of the front frame 3 relative to the rear frame 4. If it is necessary to adjust the front and rear positions of the front frame 3 relative to the rear frame 4, only slightly loosen the two first locking bolts a2 on the left and right sides, so that the front frame 3 can be relatively easily moved relative to the rear frame 4.

[0024] The front panel 1 is fixed on the upper side of the front frame 3, and the rear panel 2 is fixed on the upper side of the rear frame 4. When the front frame 3 and the rear frame 4 are assembled to form a square structure, a part of the front panel 1 is stacked on a part of the rear panel 2 in an up-down manner, the front panel 1 is stacked above the rear panel 2, and the upper surface of the rear panel 2 is provided with a plurality of seat depth scale lines 21, and a seat depth value mark 211 is arranged on the rear side of each seat depth scale line 21. The seat depth value mark 211 is used to indicate the seat depth value of the seat plate assembly when the rear end surface of the front panel 1 is aligned with the corresponding seat depth scale line 21.

[0025] Referring to Figure 3 Since each seat depth value mark 211 is arranged on the rear side of the corresponding seat depth scale line 21, when the rear end surface of the front panel 1 is aligned with the corresponding seat depth scale line 21, the seat depth value mark 211 corresponding to the seat depth scale line 21 will not be blocked by the front panel 1, which facilitates the user to quickly know the current seat depth. If necessary, the rear panel can also be designed to be stacked above the front panel, and the seat depth scale line and the seat depth value mark can be arranged on the upper surface of the front panel. Considering that the rear panel is subjected to more force than the front panel, it is a better choice to adopt the design that the front panel is stacked above the rear panel.

[0026] Figure 3 and Figure 4 respectively show the seat plate assembly when the seat depth is adjusted to 550mm and 400mm. It can be seen that the adjustment of the seat plate assembly to 400mm is the limit. At this time, if it is necessary to adjust the seat depth to be shorter than 400mm, it is necessary to adjust the front and rear positions of the backrest assembly relative to the seat plate assembly. Figure 5 shows the seat plate assembly and the backrest assembly when the seat depth is adjusted to 375mm. Compared with Figure 4 It can be found that the adjustment of the seat depth from 400mm to 375mm is realized by moving the backrest assembly forward.

[0027] The backrest assembly includes a backrest main body 5 and two connecting brackets 6, and the two connecting brackets 6 are respectively arranged on the left and right sides of the rear frame 4. The connecting bracket 6 is fixed on the rear frame 4 through a second locking structure, and after the second locking structure is unlocked, the connecting bracket 6 can move forward and backward relative to the rear frame 4, thereby realizing the adjustment of the front and rear positions of the backrest assembly relative to the seat plate assembly.

[0028] Similar to the first locking assembly, the second locking assembly comprises a second locking bolt b2 and a second locking block b1, and the left and right sides of the rear frame 4 are each provided with a third track 42, the second locking block b1 is arranged in the third track 42 and can move forward and backward along the third track 42, the second locking block b1 is provided with a threaded hole matched with the second locking bolt b2, and the side wall of the third track 42 facing the connecting bracket 6 is provided with a strip-shaped opening corresponding to the threaded hole of the second locking block b1, and the second locking bolt b2 passes through the connecting bracket 6 and is threadedly connected with the second locking block b1.

[0029] After the second locking bolt b2 is tightened, the second locking block b1 clamps the side wall of the third track 42 provided with the strip-shaped opening and the connecting bracket 6, so as to fix the connecting bracket 6 relative to the rear frame 4. If it is necessary to adjust the front and rear positions of the connecting bracket 6 relative to the rear frame 4, only the eight second locking bolts b2 on the left and right sides need to be slightly loosened, so that the two connecting brackets 6 on the left and right sides can be relatively easily moved relative to the rear frame 4. Embodiment two

[0030] Referring to Figure 6 A wheelchair adopts the seat depth adjusting structure of the embodiment one, and other structures of the wheelchair except the seat depth adjusting structure are not the innovation points to be protected by the utility model, and therefore are not described in detail in the present application. For the other structures of the wheelchair except the seat depth adjusting structure, the person skilled in the art can refer to Figure 6 for the design, or can refer to various existing wheelchairs for the design.

Claims

1. A seat depth adjustment structure comprising a seat pan assembly, characterized by: The seat plate assembly comprises a front panel (1), a rear panel (2), a front frame (3) and a rear frame, the front frame (3) and the rear frame are both "U" shaped structures, so as to have two side parts, the front frame (3) and the rear frame (4) are oppositely arranged, the side part of the front frame (3) is inserted into the corresponding side part of the rear frame (4), so that the front frame (3) and the rear frame (4) are assembled to form a square structure, the side part of the front frame (3) and the side part of the rear frame (4) are fixed through a first locking structure, after the first locking structure is unlocked, the front frame (3) can move forward and backward relative to the rear frame (4), so as to realize the seat depth adjustment of the seat plate assembly; the front panel (1) and the rear panel (2) are fixed on the upper sides of the front frame (3) and the rear frame (4) respectively, when the front frame (3) and the rear frame (4) are assembled to form a square structure, a part of the front panel (1) and a part of the rear panel (2) are stacked up and down.

2. The seat depth adjustment structure of claim 1, wherein: When the front frame (3) and the rear frame (4) are assembled to form a square structure, the front panel (1) is stacked above the rear panel (2), the upper surface of the rear panel (2) is provided with a plurality of seat depth scale lines (21), a seat depth value mark (211) is arranged at the rear side of each seat depth scale line (21), and the seat depth value mark (211) is used for indicating the seat depth value of the seat plate assembly when the rear end surface of the front panel (1) is aligned with the corresponding seat depth scale line (21).

3. The seat depth adjustment structure of claim 1, wherein: The side part of the rear frame (4) is provided with a first track (41) matched with the side part of the front frame (3), and the side part of the front frame (3) is inserted into the corresponding first track (41), so that the rear frame (4) guides the forward and backward movement of the front frame (3) through the first track (41).

4. The seat depth adjustment structure of claim 3, wherein: The first locking structure comprises a first locking block (a1) and a first locking bolt (a2), the first locking block (a1) is provided with a threaded hole matched with the first locking bolt (a2), the lower side of the front frame (3) is provided with a second track (31) matched with the first locking block (a1), the first locking block (a1) is arranged in the second track (31) and can move forward and backward along the second track (31), the lower side wall of the second track (31) is provided with a strip-shaped opening corresponding to the threaded hole of the first locking block (a1), the first locking bolt (a2) is inserted into the first track (41) from the lower side of the rear frame (4) and is threadedly connected with the first locking block (a1), after the first locking bolt (a2) is tightened, the side wall of the first track (41) and the first locking block (a1) clamp the lower side wall of the second track (31), so as to realize the fixation of the front frame (3) relative to the rear frame (4).

5. The seat depth adjustment structure according to any one of claims 1 to 4, characterized in that: The backrest assembly further comprises a backrest main body (5) and two connecting supports (6), the two connecting supports (6) are fixed on the left and right sides of the rear frame (4) through a second locking structure, after the second locking structure is unlocked, the connecting supports (6) can move forward and backward relative to the rear frame (4), so as to realize the adjustment of the forward and backward positions of the backrest assembly relative to the seat plate assembly.

6. The seat depth adjustment structure of claim 5, wherein: The second locking assembly comprises a second locking bolt (b2) and a second locking block (b1), and the rear frame (4) is provided with a third track (42) on each of the left and right sides. The second locking block (b1) is arranged in the third track (42) and can move forward and backward along the third track (42). The second locking block (b1) is provided with a threaded hole matched with the second locking bolt (b2). The side wall of the third track (42) facing the connecting support (6) is provided with a strip-shaped opening corresponding to the threaded hole of the second locking block (b1). The second locking bolt (b2) passes through the connecting support (6) and is screwed with the second locking block (b1). After the second locking bolt (b2) is tightened, the second locking block (b1) clamps the side wall of the third track (42) provided with the strip-shaped opening and the connecting support (6), so as to fix the connecting support (6) relative to the rear frame (4).

7. A wheelchair characterized by: The seat depth adjustment structure as claimed in any one of claims 1 to 6.

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