Headrest mounting structure for folding wheelchair

Abstract

The utility model relates to the technical field of medical auxiliary instruments, in particular to a headrest mounting structure for a folding wheelchair, a headrest is mounted on a wheelchair main body, and the wheelchair main body is provided with a structure capable of being folded left and right through two supporting frames; the mounting block is arranged in the middle of the two support frames and is used for supporting a headrest; the telescopic rods are arranged between the mounting block and the two supporting frames, one ends of the telescopic rods are rotationally connected with the mounting block, the other ends of the telescopic rods are rotationally connected with the corresponding supporting frames, and the telescopic rods are used for adjusting when the headrest is switched between the using state and the folding state; the sliding sleeves are respectively arranged on the two telescopic rods in a sliding manner; the clamping piece is arranged between the sliding sleeve and the mounting block and can be used for clamping and interlocking the sliding sleeve and the mounting block; the headrest is arranged in the connecting port in the mounting block in a sliding manner; and the sunshade piece is detachably arranged on the mounting block.

Description

Technical Field

[0001] This utility model relates to the field of medical assistive device technology, and in particular to a headrest mounting structure for a folding wheelchair. Background Technology

[0002] To improve user comfort, an increasing number of wheelchairs are being equipped with headrest components to provide head support during use. However, existing wheelchair headrest structures generally have the following shortcomings:

[0003] Poor structural stability and limited adjustment functions. Traditional headrests are mostly installed on the back of wheelchairs through simple plug-in or bolt fixing, lacking a flexible adjustment mechanism. They cannot be precisely positioned according to different users' head height, body shape, or sitting habits, which can easily lead to insufficient head support or discomfort due to pressure.

[0004] The headrests are not well integrated with the wheelchair body, affecting their folding and portability. Some headrests need to be removed separately during wheelchair folding, which is cumbersome and affects the overall storage volume of the wheelchair. This results in a poor user experience, especially for users who need to frequently take their wheelchairs out.

[0005] There is a lack of auxiliary function expansion design. For example, sunshade structures are of significant practical need in summer or outdoor use, but most headrest products on the market do not have reserved expansion interfaces or integrated sunshade components, and cannot meet the usage requirements of multiple environments. Utility Model Content

[0006] The purpose of this invention is to provide a headrest mounting structure for folding wheelchairs to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a headrest mounting structure for a folding wheelchair, wherein the headrest is mounted on the wheelchair body, the wheelchair body having a structure capable of folding left and right via two support frames; a mounting block, disposed in the middle of the two support frames, for supporting the headrest; telescopic rods, respectively disposed between the mounting block and the two support frames, one end of which is rotatably connected to the mounting block, and the other end of which is rotatably connected to the corresponding support frame, for adjusting the headrest when switching between the use and folded states; a sliding sleeve, slidably disposed on the two telescopic rods; a snap-fit ​​component, disposed between the sliding sleeve and the mounting block, capable of snapping and locking the sliding sleeve and the mounting block; and a connection port, in which the headrest is slidably disposed on the mounting block.

[0008] Preferably, the telescopic rod includes an inner tube rotatably connected to the mounting block and an outer tube rotatably connected to the corresponding support frame; the inner tube is slidably disposed within the outer tube.

[0009] Preferably, a connecting component is further provided between the mounting block and the sunshade component for mounting the sunshade component on the mounting block; the connecting component includes: a figure-eight baffle fixedly mounted on the mounting block; a limiting block disposed above the figure-eight baffle, which cooperates with the figure-eight baffle to form a trapezoidal insertion space; a lifting rod, one end of which is connected to the sunshade component, and the other end of which is provided with a sliding block, the lifting rod being used to lift the sunshade component, the shape of the sliding block matching the trapezoidal insertion space; and a fixing component disposed between the sliding block and the figure-eight baffle, which fixes the sliding block after it is inserted into the trapezoidal insertion space.

[0010] Preferably, the mounting block is further provided with a sunshade component; the sunshade component includes: a sunshade plate for blocking sunlight; and an adjusting rod, one end of which is connected to the sunshade plate and the other end of which is connected to the sliding block for adjusting the height and angle of the sunshade plate.

[0011] Preferably, the snap-fit ​​component includes a snap-fit ​​plug disposed at one end of the mounting block, the end of which is arrow-shaped; and a snap-fit ​​hole formed at one end of the sliding sleeve, which cooperates with the snap-fit ​​plug to form a snap-fit ​​engagement after the snap-fit ​​plug is inserted.

[0012] Preferably, the fixing component includes a fixing plug disposed on the side of the sliding block, the end of which is arrow-shaped; and a fixing hole formed on the side of the figure-eight baffle, which cooperates with the fixing plug to form a snap-fit ​​engagement after the fixing plug is inserted.

[0013] Preferably, the bottom of the sliding sleeve is provided with a wave structure, and the corresponding bottom of the mounting block is provided with a matching wave structure, so that the two form a shape fit when they are engaged.

[0014] The beneficial effects of this utility model are:

[0015] The headrest's efficient switching between its active and folded states is achieved through a linkage structure consisting of a mounting block, a telescopic rod, and a sliding sleeve positioned between the wheelchair support frame. After sliding to the mounting block, the sliding sleeve interlocks via a snap-fit ​​mechanism, simultaneously covering and restricting the rotational connection between the telescopic rod and the mounting block. This ensures stable positioning of the headrest structure, preventing wobbling or displacement during use. When folding the wheelchair, simply release the snap-fit ​​and slide the sleeve to release the rotational connection, allowing the headrest to fold into a U-shape, compactly integrating with the wheelchair for easy and efficient storage.

[0016] The sunshade assembly utilizes a connecting component consisting of a figure-eight baffle, a limiting block, a lifting rod, and a sliding latch to achieve detachable installation. The trapezoidal insertion space, combined with the inverted trapezoidal sliding latch structure, enhances insertion stability and directional guidance. Furthermore, the snap-fit ​​structure between the fixed plug and the fixing hole further strengthens the connection. The sunshade panel and adjusting rod on the sunshade are rotatable and height-adjustable. The adjusting rod is a hollow telescopic rod with an external positioning knob, allowing for flexible adjustment of height and angle according to the sun's angle, meeting different environmental and personal needs, and significantly improving user experience and functional practicality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional schematic diagram of a headrest mounting structure for a folding wheelchair according to an embodiment of the present invention.

[0019] Figure 2 This is an exploded view of the connecting component structure of a headrest mounting structure for a folding wheelchair according to an embodiment of the present invention;

[0020] Figure 3 This invention relates to a headrest mounting structure for a folding wheelchair. Figure 2 Enlarged view of the structure at point A in the middle;

[0021] Figure 4 This is a schematic diagram of the connecting component structure of a headrest mounting structure for a folding wheelchair, according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of a headrest structure for a folding wheelchair, according to an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of a sunshade structure for a headrest mounting structure of a folding wheelchair, according to an embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the main body of a wheelchair with a headrest mounting structure for a folding wheelchair, according to an embodiment of the present invention.

[0025] Reference numerals: wheelchair body (100), mounting block (101), telescopic rod (102), sliding sleeve (103), snap-fit ​​component (104), snap-fit ​​plug (104a), snap-fit ​​hole (104b), headrest (105), connecting assembly (106), figure-eight baffle (106a), limit block (106b), lifting rod (106c), sliding block (106d), fixing component (106e), fixing plug (106e-1), fixing hole (106e-2), connection port (107), sunshade component (108), sunshade panel (108a), adjusting rod (108b). Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0027] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar words used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] like Figures 1 to 7As shown in the specific embodiment of this utility model, a headrest mounting structure for a folding wheelchair is provided. The headrest 105 is mounted on the wheelchair body 100 and has a structure that can be folded left and right via two support frames. A mounting block 101 is disposed in the middle of the two support frames to support the headrest 105. Telescopic rods 102 are respectively disposed between the mounting block 101 and the two support frames, with one end rotatably connected to the mounting block 101 and the other end rotatably connected to the corresponding support frame, for adjusting the headrest 105 when switching between the use and folding states. A sliding sleeve 103 is slidably disposed on the two telescopic rods 102. A snap-fit ​​member 104 is disposed between the sliding sleeve 103 and the mounting block 101, which can snap-fit ​​and interlock the sliding sleeve 103 and the mounting block 101. A connection port 107 is slidably disposed in the connection port 107 on the mounting block 101. A sunshade 108 is detachably disposed on the mounting block 101. The sliding sleeve 103, when slid to the mounting block 101 and engaged with it, covers and restricts the rotational connection between the telescopic rod 102 and the mounting block 101, thereby preventing rotation and fixing the headrest 105 structure. In normal use, the sliding sleeve 103 engages with the mounting block 101, and the headrest 105 remains stably positioned with the telescopic rod 102 via the mounting block 101. When the wheelchair needs to be folded, the engaging piece 104 is released, and the sliding sleeve 103 slides out of the rotational connection between the telescopic rod 102 and the mounting block 101. The telescopic rod 102 and the mounting block 101 can then rotate relative to the support frame, forming a U-shaped folding structure. After the headrest 105 is inserted into the connection port 107, it can be adjusted up and down along the sliding trajectory of the connection port 107, thereby flexibly adjusting according to the user's head height or sitting posture. The connection port 107 may also be provided with a positioning structure, such as an elastic buckle or bolt holes, so that the headrest 105 can be automatically positioned and locked after sliding to a predetermined position, preventing the headrest 105 from shifting or loosening during use. The telescopic rod 102 includes an inner tube 102a that is rotatably connected to the mounting block 101, and an outer tube 102b that is rotatably connected to the corresponding support frame; the inner tube 102a is slidably disposed in the outer tube 102b.

[0029] A connecting component 106 is also provided between the mounting block 101 and the sunshade 108, allowing the sunshade 108 to be detachably mounted on the mounting block 101. The connecting component 106 includes: a V-shaped baffle 106a, fixedly mounted on the mounting block 101; a limiting block 106b, positioned above the V-shaped baffle 106a, which cooperates with the V-shaped baffle 106a to form a trapezoidal insertion space; a lifting rod 106c, one end of which is connected to the sunshade 108, and the other end of which is provided with a sliding block 106d. The lifting rod 106c is used to lift the sunshade 108, and the shape of the sliding block 106d matches the trapezoidal insertion space; and a fixing component 106e, positioned between the sliding block 106d and the V-shaped baffle 106a, which fixes the sliding block 106d after it is inserted into the trapezoidal insertion space. The figure-eight baffle 106a is composed of inwardly inclined plates with a pre-drilled gap between them for insertion, forming a figure-eight-shaped structure. This structure effectively restricts the insertion direction and improves connection stability. The limiting block 106b is located at the upper end of the figure-eight baffle 106a and together with it defines a trapezoidal insertion space. The narrow inner and wide outer structure of the space facilitates the insertion of the sliding block 106d and prevents it from falling out. The lifting rod 106c is a hollow tubular structure. The outline of the sliding block 106d is an inverted trapezoid, which precisely matches the trapezoidal insertion space formed between the figure-eight baffle 106a and the limiting block 106b, allowing for stable insertion.

[0030] The snap-fit ​​component 104 includes a snap-fit ​​plug 104a disposed at one end of the mounting block 101, the end of which is arrow-shaped; and a snap-fit ​​hole 104b formed at one end of the sliding sleeve 103, which mates with the snap-fit ​​plug 104a to form a snap-fit ​​engagement after the snap-fit ​​plug 104a is inserted. The snap-fit ​​plug 104a is disposed at the end of the mounting block 101 facing the sliding sleeve 103, and its end is symmetrically arrow-shaped with an elastic protrusion to generate a snap-fit ​​force after insertion into the snap-fit ​​hole 104b. The snap-fit ​​plug 104a is preferably made of engineering plastic or spring steel with a certain degree of elasticity to achieve good elastic deformation and reset during insertion and removal.

[0031] The fastener 106e includes a fastening plug 106e-1 located on the side of the sliding block 106d, with its end shaped like an arrow; and a fastening hole 106e-2 located on the side of the figure-eight baffle 106a, which mates with the fastening plug 106e-1 to form a snap-fit ​​engagement after the fastening plug 106e-1 is inserted. The fastening plug 106e-1, located on the side of the sliding block 106d, has a symmetrical arrow-shaped end with an elastic protrusion and a guide bevel, allowing it to be smoothly inserted into the fastening hole 106e-2 and engaged in the limiting position for reliable locking. This plug structure facilitates quick insertion and removal while also possessing a certain degree of tensile strength, ensuring a stable connection during the lifting or shaking of the headrest 105.

[0032] The bottom of the sliding sleeve 103 has a wave-like structure, and the corresponding bottom of the mounting block 101 has a matching wave-like structure, forming a shape fit when engaged. Specifically, the bottom of the sliding sleeve 103 has an inwardly extending wave-like groove structure. This wave-like structure extends along the length of the sliding sleeve 103 and has multiple continuous arc-shaped convex and concave units to provide a shape-fitting contact surface. The corresponding bottom of the mounting block 101 has a wave-like protrusion structure that matches this wave-like structure, its contour perfectly matching the wave-like groove on the bottom of the sliding sleeve 103. When the sliding sleeve 103 slides into place and engages with the mounting block 101 via the snap-fit ​​member 104, the convex and concave fit between the wave-like structures further prevents relative rotation between the sliding sleeve 103 and the mounting block 101, enhancing the stability and shear resistance of the connection. Compared to simple planar contact, this wave-like structural design provides more contact surfaces and mechanical engagement points in the connection area, effectively improving the locking strength of the structure and ensuring a secure state under vibration or load changes during wheelchair use.

[0033] Working principle: The mounting block 101 of the headrest 105 is positioned and folded via a telescopic rod 102 and a sliding sleeve 103, which are located between the two wheelchair support frames. One end of the telescopic rod 102 is rotatably connected to the mounting block 101, and the other end is rotatably connected to the wheelchair support frame. The sliding sleeve 103 is slidably mounted on the telescopic rod 102 and can be locked to the mounting block 101 via a snap-fit ​​device 104 after sliding to the mounting block 101. In the locked state, the sliding sleeve 103 covers and restricts the rotational connection between the telescopic rod 102 and the mounting block 101, thereby fixing it, preventing rotation, and achieving stable positioning of the entire headrest 105 structure.

[0034] In normal use, the headrest 105 slides into the connection port 107 on the mounting block 101 via its bottom. Users can adjust the position of the headrest 105 along the direction of the connection port 107 to accommodate different body types and sitting postures. The connection port 107 is equipped with a positioning structure or locking mechanism, such as an elastic buckle or a limiting hole. When the headrest 105 slides to the predetermined position, it can automatically position and lock stably, preventing displacement of the headrest 105 during use.

[0035] When the wheelchair needs to be folded, the locking state of the latch 104 is released, and the sliding sleeve 103 slides away from the mounting block 101 along the direction of the telescopic rod 102, releasing the rotating connection part, so that the telescopic rod 102 and the mounting block 101 can rotate relative to the support frame, and the entire structure forms a U-shaped folding state, so that the headrest 105 can be compactly folded along with the wheelchair as a whole, making it easy to store and transport.

[0036] The mounting block 101 is also equipped with a sunshade component 108, which can be disassembled or adjusted as needed. The sunshade component 108 is detachably connected by a connecting assembly 106 consisting of a figure-eight baffle 106a, a limiting block 106b, a lifting rod 106c, a sliding block 106d, and a fixing component 106e. The user can insert the sliding block 106d on the sunshade component 108 into the trapezoidal insertion space defined by the figure-eight baffle 106a and the limiting block 106b, and insert the fixing plug 106e-1 located on the side of the sliding block 106d into the fixing hole 106e-2 on the figure-eight baffle 106a to achieve quick and stable installation of the sunshade component 108.

[0037] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; under the concept of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0038] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A headrest mounting structure for a folding wheelchair, wherein the headrest (105) is mounted on the wheelchair body (100), characterized in that: The wheelchair body (100) has a structure that allows it to be folded left and right via two support frames; The mounting block (101) is located in the middle of the two support frames and is used to support the headrest (105). Telescopic rods (102) are respectively disposed between the mounting block (101) and the two support frames. One end of the telescopic rod is rotatably connected to the mounting block (101), and the other end is rotatably connected to the corresponding support frame. The telescopic rods (102) are used to realize the folding function of the wheelchair body (100) and the headrest (105). The sliding sleeve (103) is slidably mounted on the two telescopic rods (102); A snap-fit ​​connector (104) is disposed between the sliding sleeve (103) and the mounting block (101) to snap-fit ​​and interlock the sliding sleeve (103) and the mounting block (101); Connection port (107), the headrest (105) is slidably disposed in the connection port (107) on the mounting block (101).

2. The headrest mounting structure for a folding wheelchair according to claim 1, characterized in that, The telescopic rod (102) includes an inner tube (102a) rotatably connected to the mounting block (101) and an outer tube (102b) rotatably connected to the corresponding support frame; the inner tube (102a) is slidably disposed in the outer tube (102b).

3. The headrest mounting structure for a folding wheelchair according to claim 1, characterized in that, The mounting block (101) is also provided with a sunshade (108); A connecting component (106) is further provided between the mounting block (101) and the sunshade (108) for mounting the sunshade (108) on the mounting block (101); the connecting component (106) includes: The figure-eight baffle (106a) is fixedly mounted on the mounting block (101); A limiting block (106b) is disposed above the figure-eight baffle (106a) and cooperates with the figure-eight baffle (106a) to form a trapezoidal insertion space; The lifting rod (106c) is connected to the sunshade (108) at one end and has a sliding block (106d) at the other end. The lifting rod (106c) is used to lift the sunshade (108) and the shape of the sliding block (106d) matches the trapezoidal insertion space. The fixing element (106e) is disposed between the sliding block (106d) and the figure-eight baffle (106a) and is fixed after the sliding block (106d) is inserted into the trapezoidal insertion space.

4. The headrest mounting structure for a folding wheelchair according to claim 3, characterized in that, The sunshade (108) includes: a sunshade panel (108a) for blocking sunlight; An adjusting rod (108b) is connected at one end to the sunshade (108a) and at the other end to the sliding block (106d) for adjusting the height and angle of the sunshade (108a).

5. The headrest mounting structure for a folding wheelchair according to claim 1, characterized in that, The snap-fit ​​component (104) includes a snap-fit ​​plug (104a) disposed at one end of the mounting block (101), the end of which is arrow-shaped; A snap-fit ​​hole (104b) is provided at one end of the sliding sleeve (103) and cooperates with the snap-fit ​​plug (104a) to form a snap-fit ​​engagement with it after the snap-fit ​​plug (104a) is inserted.

6. The headrest mounting structure for a folding wheelchair according to claim 3, characterized in that, The fixing member (106e) includes a fixing plug (106e-1) disposed on the side of the sliding block (106d), the end of which is arrow-shaped; The fixing hole (106e-2) is opened on the side of the figure-eight baffle (106a) and cooperates with the fixing plug (106e-1) to form a snap-fit ​​engagement with it after the fixing plug (106e-1) is inserted.

7. The headrest mounting structure for a folding wheelchair according to claim 1, characterized in that, The bottom of the sliding sleeve (103) is provided with a wave structure, and the bottom of the mounting block (101) is provided with a matching wave structure. The two form a shape fit when they are engaged.

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