Headrest protection structure for a wheelchair

Abstract

The utility model relates to the technical field of wheelchair, disclose a headrest protection structure for wheelchair can be used, including handrail frame, the symmetrical type installation has lock block on the handrail frame, fixedly installs the lock board between lock block, the upper end of lock block is installed with U type frame through the elevating portion, installs the adjusting plate through the locking mechanism on U type frame, the upper end of adjusting plate is installed with the protection headrest through the angle adjusting mechanism, still be provided with angle keeping mechanism between protection headrest and lock board. The utility model, through the mutual cooperation between the lock block and the elevating portion that set up, realized the change of U type frame height, finally ensured the adjustment need of protection headrest under different height, satisfied the protection need of head under different scenes, wide application range, through the mutual cooperation of locking mechanism, angle adjusting mechanism and angle keeping mechanism that set up, realized the quick change of protection angle of protection headrest, further ensured the reliability of wheelchair when using, the practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, specifically a headrest protection structure that can be used in wheelchairs. Background Technology

[0002] Wheelchairs are essential tools for rehabilitation. They not only provide transportation for people with physical disabilities and limited mobility, but more importantly, they enable them to engage in physical exercise and participate in social activities. A typical wheelchair consists of four parts: a frame, wheels, brakes, and a seat / backrest. A hand-cranked wheelchair adds a hand crank to the basic wheelchair design. An electric wheelchair adds an electronic power assist system to the basic wheelchair design, reducing the user's physical exertion. A smart wheelchair, in addition to electric wheelchair features, adds positioning and movement capabilities, standing movement, remote control movement, and related internet-enabled assistive living features.

[0003] In existing technologies, many elderly wheelchair users suffering from peripheral neurological diseases find it difficult to maintain a head-up posture using their own strength in daily life. Poor posture can not only cause other health problems but also inconvenience family members during caregiving activities such as feeding and hydration. Therefore, there is a need to design a headrest protection structure suitable for wheelchairs. Utility Model Content

[0004] The purpose of this invention is to provide a headrest protection structure that can be used in wheelchairs, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A headrest protection structure for wheelchairs includes an armrest frame, on which locking blocks are symmetrically installed, and locking plates are fixedly installed between the locking blocks. A U-shaped frame is installed on the upper end of the locking blocks via a lifting part, and an adjusting plate is installed on the U-shaped frame via a locking mechanism. A protective headrest is installed on the upper end of the adjusting plate via an angle adjustment mechanism, and an angle holding mechanism is also provided between the protective headrest and the locking plate.

[0006] As an improvement of this utility model, a protective sleeve is fitted onto the end of the handrail frame.

[0007] As an improvement of this utility model: the lifting part is fixed to the lifting sleeve at the upper end of the locking block, and the side wall of the lifting sleeve is equipped with a lifting stud through a threaded structure. The side of the lifting stud close to the inner wall of the lifting sleeve abuts against the U-shaped frame.

[0008] As an improvement of this utility model: the locking mechanism includes a locking cylinder fixed to the lower side of the adjusting plate, a locking shaft slidably mounted on the side wall of the locking cylinder by a locking spring, a locking wedge fixedly mounted on the side of the locking shaft near the U-shaped frame, a fixing cylinder fixedly mounted on the U-shaped frame corresponding to the position of the locking cylinder, and a plurality of fixing grooves that cooperate with the locking wedges on the side wall of the fixing cylinder.

[0009] As an improvement of this utility model: the angle adjustment mechanism includes a connecting block fixed to the back of the protective headrest, the connecting block being rotatably engaged at the end of the adjustment plate, and an adjustment screw shaft being installed between the connecting block and the adjustment plate through a threaded structure. One end of the adjustment screw shaft is equipped with an adjustment nut through a threaded structure, and the other end is provided with an angle adjustment component.

[0010] As an improvement of this utility model: the angle adjustment component includes a locking block fixed to the other end of the adjustment screw shaft, a plurality of locking teeth are provided on the inner side of the locking block, a locking groove is provided on the outer wall of the adjustment plate corresponding to the position of the locking block, and a tooth groove is also provided on the connecting block corresponding to the position of the locking teeth.

[0011] As an improvement of this utility model: the angle maintaining mechanism includes an upper screw hinged to the bottom of the protective headrest and a lower screw hinged to the lock plate. The threads of the upper screw and the lower screw have opposite directions. A threaded cylinder is also installed between the upper screw and the lower screw through a threaded structure.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. By cooperating with the locking blocks and lifting parts, the height of the U-shaped frame can be changed, thus ensuring the adjustment of the protective headrest at different heights and meeting the head protection needs in different scenarios, making it widely applicable. 2. Through the coordinated operation of the locking mechanism, angle adjustment mechanism, and angle holding mechanism, the protective angle of the headrest can be quickly changed, further ensuring the reliability of the wheelchair during use and making it highly practical. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall front view of the present invention; Figure 2 This is a schematic diagram of the installation structure of the protective headrest in this utility model; Figure 3 This is a schematic diagram of the installation structure of the U-shaped frame in this utility model; Figure 4 for Figure 2 A magnified schematic diagram of the structure of part A in the diagram; Figure 5 for Figure 3 A magnified schematic diagram of the partial structure of B in the diagram; Figure 6 This is a cross-sectional view of the angle adjustment mechanism in this utility model. Figure 7 for Figure 6 A magnified schematic diagram of the structure of C in the middle; Figure 8 This is a schematic diagram of the installation structure of this utility model on a wheelchair.

[0014] In the diagram: 1. Handrail frame; 2. Protective sleeve; 3. Locking block; 4. Lifting sleeve; 5. Lifting stud; 6. U-shaped frame; 7. Adjusting plate; 8. Protective headrest; 9. Threaded cylinder; 10. Locking plate; 11. Lower screw; 12. Upper screw; 13. Connecting block; 14. Locking spring; 15. Locking cylinder; 16. Locking wedge; 17. Locking shaft; 18. Fixing groove; 19. Fixing cylinder; 20. Adjusting screw shaft; 21. Adjusting nut; 22. Locking tooth; 23. Locking block; 24. Locking groove; 25. Tooth groove. Detailed Implementation

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0016] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] Example 1: See Figures 1 to 8 In this embodiment of the invention, a headrest protection structure for wheelchairs includes an armrest frame 1, with locking blocks 3 symmetrically mounted on the armrest frame 1. Locking plates 10 are fixedly installed between the locking blocks 3. A U-shaped frame 6 is mounted on the upper end of the locking blocks 3 via a lifting mechanism. An adjusting plate 7 is mounted on the U-shaped frame 6 via a locking mechanism. A protective headrest 8 is mounted on the upper end of the adjusting plate 7 via an angle adjustment mechanism. The cooperation between the locking mechanism and the angle adjustment mechanism ensures the safe use of the entire headrest in a wheelchair.

[0020] To facilitate pushing the wheelchair, a protective sleeve 2 is installed at the end of the armrest frame 1.

[0021] In addition, to effectively ensure the vertical adjustment of the entire protective headrest 8, the lifting part in this structure is fixed to the lifting sleeve 4 at the upper end of the locking block 3. A lifting stud 5 is installed on the side wall of the lifting sleeve 4 via a threaded structure, and the side of the lifting stud 5 closest to the inner wall of the lifting sleeve 4 abuts against the U-shaped frame 6. By utilizing the abutment of the lifting stud 5 at different vertical positions on the U-shaped frame 6, its vertical height can be effectively and quickly adjusted.

[0022] The locking mechanism in this structure includes a locking cylinder 15 fixed to the lower side of the adjusting plate 7. A locking shaft 17 is slidably mounted on the side wall of the locking cylinder 15 via a locking spring 14. A locking wedge 16 is fixedly mounted on the side of the locking shaft 17 near the U-shaped frame 6. A fixing cylinder 19 is fixedly mounted on the U-shaped frame 6 at the position corresponding to the locking cylinder 15. The side wall of the fixing cylinder 19 is provided with multiple fixing grooves 18 that cooperate with the locking wedge 16. Utilizing the locking spring 14 and under the action of the locking shaft 17, the locking wedge 16 abuts against the fixing grooves 18 at different positions, thereby changing the angular position of the locking cylinder 15 on the fixing cylinder 19, ultimately ensuring rapid angle adjustment.

[0023] In addition, in order to effectively ensure the rapid fine adjustment of the protective headrest 8 at the tilt position, the angle adjustment mechanism in this structure includes a connecting block 13 fixed to the back of the protective headrest 8. The connecting block 13 is rotatably engaged at the end of the adjustment plate 7. An adjustment screw shaft 20 is installed between the connecting block 13 and the adjustment plate 7 through a threaded structure. An adjustment nut 21 is installed at one end of the adjustment screw shaft 20 through a threaded structure, and an angle adjustment component is provided at the other end.

[0024] The angle adjustment component includes a locking block 23 fixed to the other end of the adjustment screw 20. Multiple locking teeth 22 are provided on the inner side of the locking block 23. A locking groove 24 is provided on the outer wall of the adjustment plate 7 corresponding to the position of the locking block 23. A tooth groove 25 is also provided on the connecting block 13 corresponding to the position of the locking teeth 22.

[0025] During the adjustment process, the position of the connecting block 13 on the adjusting plate 7 is quickly changed by the interlocking action between the toothed groove 25 and the locking tooth 22. At the same time, the angle is quickly changed by the connection between the adjusting screw shaft 20 and the adjusting nut 21.

[0026] Example 2: In another embodiment of the present invention, the difference between this embodiment and the above embodiment is that an angle holding mechanism is also provided between the protective headrest 8 and the locking plate 10.

[0027] The angle-maintaining mechanism includes an upper screw 12 hinged to the bottom of the protective headrest 8 and a lower screw 11 hinged to the locking plate 10. The threads of the upper screw 12 and the lower screw 11 have opposite directions, and a threaded sleeve 9 is installed between the upper screw 12 and the lower screw 11 via a threaded structure. The threaded sleeve 9, acting as a connection between the upper screw 12 and the lower screw 11, prevents the protective headrest 8 from wobbling excessively after angle adjustment, further ensuring its stability.

[0028] In summary, during use, the height of the entire protective headrest 8 is changed using the lifting mechanism, and with the cooperation of the angle adjustment mechanism and the locking mechanism, the angle position of the protective headrest 8 can be quickly changed. At the same time, an angle holding mechanism is included to further ensure the stability of the protective headrest 8 after adjustment. The entire structure is easy to adjust and is worthy of widespread use.

[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A headrest protection structure for use in wheelchairs, comprising an armrest frame (1), characterized in that, The handrail (1) is symmetrically equipped with locking blocks (3), and locking plates (10) are fixedly installed between the locking blocks (3). A U-shaped frame (6) is installed on the upper end of the locking block (3) through a lifting part. An adjusting plate (7) is installed on the U-shaped frame (6) through a locking mechanism. A protective headrest (8) is installed on the upper end of the adjusting plate (7) through an angle adjustment mechanism. An angle holding mechanism is also provided between the protective headrest (8) and the locking plate (10).

2. A headrest protection structure for wheelchairs according to claim 1, characterized in that, The handrail (1) is fitted with a protective sleeve (2) at its end.

3. A headrest protection structure for wheelchairs according to claim 1, characterized in that, The lifting part is fixed to the lifting sleeve (4) at the upper end of the locking block (3). The side wall of the lifting sleeve (4) is equipped with a lifting stud (5) through a threaded structure. The side of the lifting stud (5) near the inner wall of the lifting sleeve (4) abuts against the U-shaped frame (6).

4. A headrest protection structure for wheelchairs according to claim 3, characterized in that, The locking mechanism includes a locking cylinder (15) fixed on the lower side of the adjusting plate (7). A locking shaft (17) is slidably installed on the side wall of the locking cylinder (15) via a locking spring (14). A locking wedge (16) is fixedly installed on the side of the locking shaft (17) near the U-shaped frame (6). A fixing cylinder (19) is fixedly installed on the U-shaped frame (6) at the position corresponding to the locking cylinder (15). The side wall of the fixing cylinder (19) is provided with multiple fixing grooves (18) that cooperate with the locking wedge (16).

5. A headrest protection structure for wheelchairs according to claim 1, characterized in that, The angle adjustment mechanism includes a connecting block (13) fixed to the back of the protective headrest (8). The connecting block (13) is rotatably engaged at the end of the adjustment plate (7). An adjustment screw (20) is installed between the connecting block (13) and the adjustment plate (7) through a threaded structure. An adjustment nut (21) is installed at one end of the adjustment screw (20) through a threaded structure, and an angle adjustment component is provided at the other end.

6. A headrest protection structure for wheelchairs according to claim 5, characterized in that, The angle adjustment assembly includes a locking block (23) fixed to the other end of the adjustment screw (20). Multiple locking teeth (22) are provided on the inner side of the locking block (23). A locking groove (24) is provided on the outer wall of the adjustment plate (7) corresponding to the locking block (23). A tooth groove (25) is also provided on the connecting block (13) corresponding to the locking teeth (22).

7. A headrest protection structure for wheelchairs according to claim 6, characterized in that, The angle holding mechanism includes an upper screw (12) hinged to the bottom of the protective headrest (8) and a lower screw (11) hinged to the lock plate (10). The upper screw (12) and the lower screw (11) have opposite thread directions. A threaded cylinder (9) is also installed between the upper screw (12) and the lower screw (11) through a threaded structure.

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