Wheelchair backrest and wheelchair

Abstract

The application discloses a wheelchair backrest and a wheelchair, and belongs to the technical field of walking aids. The disclosed wheelchair comprises a wheelchair backrest, wherein the wheelchair backrest comprises a main body, the main body comprises a main bearing part and an auxiliary bearing part arranged separately, the auxiliary bearing part is arranged above the main bearing part and is fixedly connected with the main bearing part, and the auxiliary bearing part and the main bearing part jointly form a bearing surface. Compared with a conventional wheelchair backrest, the wheelchair backrest disclosed by the application has a lower processing difficulty. In addition, the separate arrangement of the main bearing part and the auxiliary bearing part helps to reduce the weight of the wheelchair backrest and is favorable for reducing the cost of the wheelchair backrest.

Description

Technical Field

[0001] This application belongs to the field of mobility device technology, specifically relating to a wheelchair backrest and a wheelchair. Background Technology

[0002] As a key component of a wheelchair, the wheelchair backrest plays a vital role in supporting the user's torso and maintaining a stable sitting posture. The ease or difficulty of its manufacturing directly affects the overall manufacturing efficiency of the wheelchair.

[0003] However, the traditional design of wheelchair backrests has shortcomings, which makes them difficult to manufacture and results in low overall manufacturing efficiency. Utility Model Content

[0004] The purpose of this application is to provide a wheelchair backrest and wheelchair, which can solve the problem of the high difficulty in processing wheelchair backrests in related technologies.

[0005] In a first aspect, embodiments of this application provide a wheelchair backrest, including a main body. The main body includes a main support portion and an auxiliary support portion that are separately arranged. The auxiliary support portion is located above the main support portion and is fixedly connected to the main support portion. The auxiliary support portion and the main support portion together form a support surface.

[0006] Secondly, embodiments of this application provide a wheelchair that includes the wheelchair backrest described above.

[0007] Traditional wheelchair backrests are usually a one-piece structure that requires overall processing. Due to the large overall size of the main body, the processing equipment and processes are highly demanding, making the processing of wheelchair backrests quite difficult.

[0008] In this embodiment, the main body of the wheelchair backrest comprises a main support portion and an auxiliary support portion that are separately configured. This configuration breaks down the main body into smaller main and auxiliary support portions, reducing the requirements for processing equipment and processes, thereby lowering the processing difficulty of the wheelchair backrest. Furthermore, separating the main and auxiliary support portions allows for flexible design of their processing techniques, materials, and dimensions according to actual needs. This helps reduce the weight of the main body while maintaining sufficient support strength, thus contributing to the lightweighting of the wheelchair. Attached Figure Description

[0009] Figures 1 to 4 These are schematic diagrams of the main body of the wheelchair backrest disclosed in the embodiments of this application from different perspectives; Figure 5 This is an exploded view of the main body of the wheelchair backrest disclosed in an embodiment of this application; Figures 6 to 8These are schematic diagrams of the wheelchair backrest disclosed in the embodiments of this application from different perspectives; Figure 9 This is a cross-sectional view of the wheelchair backrest disclosed in an embodiment of this application; Figure 10 for Figure 9 Enlarged view of Part I; Figure 11 This is an exploded schematic diagram of the wheelchair backrest disclosed in an embodiment of this application; Figure 12 This is a schematic diagram illustrating the configuration of the drive source and angle adjuster for the wheelchair disclosed in an embodiment of this application.

[0010] Explanation of reference numerals in the attached figures: 100-Main body, 110-Main bearing part, 111-First sub-part, 1111-First groove, 1112-First reinforcing rib, 112-Second sub-part, 1121-Second groove, 1122-Second reinforcing rib, 113-First positioning groove, 114-Second positioning groove, 120-Auxiliary bearing part, 121-Reinforcing flange, 122-First edge, 130-First threaded connector, 140-Bearing surface; 210-Cover, 211-Limiting part, 220-Receiving cavity, 230-Second threaded connector; 310-Drive source, 311-First connecting plate, 320-Angle adjuster, 321-Second connecting plate, 322-Connecting seat, 330-Drive shaft. Detailed Implementation

[0011] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0012] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0013] The wheelchair backrest and wheelchair provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0014] Please refer to Figures 1 to 12 As shown, this embodiment of the application provides a wheelchair backrest, including a main body 100. The main body 100 includes a main support part 110 and an auxiliary support part 120, which are separately arranged. The auxiliary support part 120 is located above the main support part 110 and is fixedly connected to the main support part 110, that is, the auxiliary support part 120 cannot rotate relative to the main support part 110. The auxiliary support part 120 and the main support part 110 together form a support surface 140, which is mainly used to support the user's back.

[0015] The main body 100 of a traditional wheelchair backrest is usually a one-piece structure, which requires processing as a whole. Due to the large overall size of the main body 100, the processing equipment and processing technology are required to be high, which makes the processing of the wheelchair backrest more difficult.

[0016] In this embodiment, the main body 100 of the wheelchair backrest includes a main support portion 110 and an auxiliary support portion 120, which are separately configured. This configuration breaks down the main body 100 into the smaller main support portion 110 and auxiliary support portion 120, thus reducing the requirements for processing equipment and processes, and consequently lowering the processing difficulty of the wheelchair backrest. Furthermore, separating the main support portion 110 and the auxiliary support portion 120 allows for flexible design of their processing techniques, materials, and dimensions according to actual needs. This helps reduce the weight of the main body 100 while maintaining sufficient support strength, thereby contributing to the lightweighting of the wheelchair.

[0017] Specifically, the main load-bearing part 110 primarily bears the force applied by the user to the main body 100, thus requiring high structural strength. The auxiliary load-bearing part 120 serves as supplementary support, with relatively lower structural strength requirements. By separating the main load-bearing part 110 and the auxiliary load-bearing part 120, their structures can be flexibly designed according to their actual strength requirements. This allows for the use of lighter materials in the manufacture of the auxiliary load-bearing part 120, and / or the processing of the auxiliary load-bearing part 120 using techniques that enable thinner processing. This approach ensures the strength of both the main load-bearing part 110 and the auxiliary load-bearing part 120 while achieving weight reduction.

[0018] In another embodiment, the auxiliary support portion 120 is a sheet metal portion, meaning it is a sheet metal structure manufactured using sheet metal processing techniques. Sheet metal structures are typically made from thinner plates, thus making the auxiliary support portion 120 a sheet metal portion helps reduce its weight. Furthermore, sheet metal structures are easy to shape adjust, facilitating adaptation to different assembly requirements later on.

[0019] In other embodiments, the auxiliary support portion 120 may also be a die-cast portion, that is, the auxiliary support portion 120 may also be a die-cast structure, which is processed by the die-casting process.

[0020] In another embodiment, the main load-bearing part 110 is a die-cast part, that is, the main load-bearing part 110 is a die-cast structure, which is processed by the die-casting process. The internal structure of the main load-bearing part 110 obtained by the die-casting process is relatively dense and uniform, which makes the main load-bearing part 110 have better mechanical properties and can withstand higher loads and impacts.

[0021] In other embodiments, the main support portion 110 may also be a sheet metal portion.

[0022] It should be noted that in this embodiment, the processing technology of the main support part 110 and the auxiliary support part 120 is not limited, and can be designed according to actual needs.

[0023] In one optional embodiment, the auxiliary support portion 120 is a sheet metal portion and the main support portion 110 is a die-cast portion, so as to reduce the weight of the main body 100 while meeting the support strength requirements.

[0024] Optionally, both the auxiliary support portion 120 and the main support portion 110 are made of aluminum to further reduce the weight of the main body 100. It should be noted that the auxiliary support portion 120 and the main support portion 110 may also be made of other materials, and the materials of the two may be the same or different. In this embodiment, no such limitation is made.

[0025] In one optional embodiment, the main support portion 110 and the auxiliary support portion 120 are detachably connected so that the main support portion 110 or the auxiliary support portion 120 can be replaced separately.

[0026] In another embodiment, reference Figure 4 As shown, the main support portion 110 includes a first sub-portion 111 and a second sub-portion 112 connected to each other. The first sub-portion 111 is located above the second sub-portion 112 and is connected to the auxiliary support portion 120. In the direction perpendicular to the support surface 140, the thickness of the second sub-portion 112 is greater than the thickness of the first sub-portion 111. The direction perpendicular to the support surface 140 is, for example, approximately... Figure 4 The direction indicated by arrow A in the diagram.

[0027] In this embodiment, the second sub-part 112 is positioned lower than the first sub-part 111. In actual application, the load it bears is greater than that of the first sub-part 111. By making the thickness of the second sub-part 112 greater than that of the first sub-part 111, the load-bearing capacity of the first sub-part 111 and the second sub-part 112 is matched with the load they bear. This avoids the first sub-part 111 being too thick, and reduces the weight of the main body 100 while meeting the support strength requirements.

[0028] Optionally, the main support part 110 is an integral structure, and the main support part 110 is the die-cast part mentioned above, and the first sub-part 111 and the second sub-part 112 are integrally formed by die casting process.

[0029] In other embodiments, the thickness of the second sub-part 112 may also be less than or equal to the thickness of the first sub-part 111.

[0030] It should be noted that the shape and size of the main support part 110 and the auxiliary support part 120 are designed according to actual needs. In this embodiment, the shape and size of the main support part 110 and the auxiliary support part 120 are not limited.

[0031] In another embodiment, reference Figure 4 As shown, the first sub-part 111 has a first groove 1111 on the side facing away from the bearing surface 140, and a first reinforcing rib 1112 is provided in the first groove 1111. The first groove 1111 reduces the weight of the first sub-part 111, while the first reinforcing rib 1112 strengthens the corresponding position of the first sub-part 111. Through the cooperation of the first groove 1111 and the first reinforcing rib 1112, the weight of the first sub-part 111 can be reduced while ensuring the supporting strength of the first sub-part 111.

[0032] In other embodiments, the side of the first sub-part 111 facing away from the bearing surface 140 may not have the first groove 1111 and the first reinforcing rib 1112.

[0033] In another embodiment, reference Figure 4 As shown, the second sub-part 112 has a second groove 1121 on the side facing away from the bearing surface 140, and a second reinforcing rib 1122 is provided in the second groove 1121. The second groove 1121 reduces the weight of the second sub-part 112, while the second reinforcing rib 1122 strengthens the corresponding position of the second sub-part 112. Through the cooperation of the second groove 1121 and the second reinforcing rib 1122, the weight of the second sub-part 112 can be reduced while ensuring the supporting strength of the second sub-part 112.

[0034] In other embodiments, the side of the second sub-part 112 facing away from the bearing surface 140 may not have the second groove 1121 and the second reinforcing rib 1122.

[0035] In one alternative embodiment, reference is made to... Figure 4As shown, in order to better reduce the weight of the main body 100, the first sub-part 111 has a first groove 1111 on the side away from the bearing surface 140, and a first reinforcing rib 1112 is provided in the first groove 1111. At the same time, the second sub-part 112 has a second groove 1121 on the side away from the bearing surface 140, and a second reinforcing rib 1122 is provided in the second groove 1121.

[0036] In another embodiment, there are at least two first reinforcing ribs 1112, which are arranged in a cross pattern, and at least two second reinforcing ribs 1122, which are arranged in a cross pattern.

[0037] In this embodiment, the intersecting first reinforcing ribs 1112 can respectively reinforce the first sub-part 111 in different directions, thereby improving the load-bearing capacity of the first sub-part 111. Similarly, the intersecting second reinforcing ribs 1122 can respectively reinforce the second sub-part 112 in different directions, thereby improving the load-bearing capacity of the second sub-part 112.

[0038] Optionally, each of the first reinforcing ribs 1112 may form a first mesh structure, and each of the second reinforcing ribs 1122 may form a second mesh structure. The first mesh structure is connected to the groove wall of the first groove 1111, and the second mesh structure is connected to the groove wall of the second groove 1121, thereby further enhancing the load-bearing capacity of the main body 100.

[0039] In other embodiments, the first reinforcing ribs 1112 may also be arranged in parallel, and similarly, the second reinforcing ribs 1122 may also be arranged in parallel.

[0040] In another embodiment, reference Figure 4 and Figure 5 As shown, a portion of the edge of the auxiliary support portion 120 is folded toward the direction away from the support surface 140, forming at least two reinforcing flanges 121, with each reinforcing flange 121 arranged at intervals along the circumference of the auxiliary support portion 120.

[0041] In this embodiment, the reinforced flange 121 enhances the strength of a portion of the edge of the auxiliary support portion 120, enabling the edge of the auxiliary support portion 120 to better resist external impacts. Furthermore, by arranging the reinforced flanges 121 at circumferential intervals along the auxiliary support portion 120, different locations on the edge of the auxiliary support portion 120 are strengthened, thereby enabling the edge of the auxiliary support portion 120 to better resist impacts from multiple directions.

[0042] In other embodiments, the edge of the auxiliary support portion 120 may not have a reinforcing flange 121. Furthermore, the number of reinforcing flanges 121 may be one. It should be noted that in this embodiment, the specific number of reinforcing flanges 121 is not limited; it can be designed according to actual needs.

[0043] In another embodiment, reference Figure 5 As shown, the first edge 122 of the auxiliary support portion 120 is disposed close to the main support portion 110. The first edge 122 is formed with a reinforcing flange 121, and the reinforcing flange 121 of the first edge 122 is in contact with and connected to the main support portion 110.

[0044] In this embodiment, the reinforcing flange 121 of the first edge 122 provides a connection basis for the connection between the auxiliary support part 120 and the main support part 110, thereby reducing the connection difficulty between the two. In addition, under this arrangement, there is basically no need to add other structures to realize the connection between the auxiliary support part 120122 and the main support part 110, thereby simplifying the structure of the wheelchair backrest.

[0045] Optionally, the reinforcing flange 121 of the first edge 122 is detachably connected to the main bearing portion 110 via the first threaded connector 130.

[0046] In other embodiments, the first edge 122 of the auxiliary support portion 120 may not have a reinforcing flange 121, or the first edge 122 of the auxiliary support portion 120 may have a reinforcing flange 121, but there is no matching relationship between the reinforcing flange 121 of the first edge 122 of the auxiliary support portion 120 and the main support portion 110. By adding other structures to the first edge 122, the auxiliary support portion 120 and the main support portion 110 can be connected by other structures.

[0047] In another embodiment, reference Figure 5 As shown, the main support part 110 is connected to both the drive source 310 and the angle adjuster 320 of the wheelchair, so as to adjust the angle of the wheelchair backrest through the drive source 310 and the angle adjuster 320 connected by transmission. The main support part 110 is provided with a first positioning groove 113 and a second positioning groove 114. The first positioning groove 113 is used to accommodate the drive source 310 and is positioned and engaged with the drive source 310. The second positioning groove 114 is used to accommodate the angle adjuster 320 and is positioned and engaged with the angle adjuster 320.

[0048] In this embodiment, the first positioning groove 113 is positioned and cooperates with the drive source 310. In this way, the installation position of the drive source 310 can be determined relatively quickly and accurately with the help of the first positioning groove 113, thereby reducing the installation difficulty of the drive source 310. In addition, under this setting, the groove wall of the first positioning groove 113 can limit the shaking of the drive source 310, thereby improving the stability of the drive source 310.

[0049] Similarly, the second positioning groove 114 is positioned and cooperates with the angle adjuster 320. With this setting, the installation position of the angle adjuster 320 can be determined relatively quickly and accurately with the help of the second positioning groove 114, thereby reducing the installation difficulty of the angle adjuster 320. In addition, under this setting, the groove wall of the second positioning groove 114 can limit the shaking of the angle adjuster 320, thereby improving the stability of the angle adjuster 320.

[0050] Optionally, the drive source 310 drives the tilt adjuster 320 to rotate, thereby adjusting the tilt angle of the wheelchair backrest by rotating the main body 100 of the wheelchair backrest relative to the wheelchair body. Specifically, the drive source 310 is, for example, a motor.

[0051] Further, refer to Figure 12 As shown, there are two angle adjusters 320. The drive source 310 is connected to the drive shaft 330 and is used to drive the drive shaft 330 to rotate. The two angle adjusters 320 are respectively connected to the two ends of the drive shaft 330, that is, the two angle adjusters 320 are driven by the same drive source 310, which simplifies the structure of the wheelchair.

[0052] Optionally, refer to Figure 12 As shown, the drive source 310 is provided with a first connecting plate 311, and is connected to the main support part 110 through the first connecting plate 311. The angle adjuster 320 is provided with a second connecting plate 321, and is connected to the main support part 110 through the second connecting plate 321.

[0053] In other embodiments, the main support portion 110 may also omit at least one of the first positioning groove 113 and the second positioning groove 114.

[0054] In another embodiment, reference Figures 6 to 11 As shown, the wheelchair backrest also includes a cover 210, which is fitted over the main body 100 and together with the side of the main body 100 facing away from the bearing surface 140, forms a receiving cavity 220. The edge of the cover 210 extends toward the bearing surface 140 and protrudes from the bearing surface 140 to form a limiting part 211. The limiting part 211 is used to limit the engagement with the wheelchair cushion disposed on the bearing surface 140 in a direction parallel to the bearing surface 140. The direction parallel to the bearing surface 140 is, for example, approximately... Figure 10 The direction indicated by arrow B in the diagram.

[0055] In this embodiment, the limiting portion 211 formed on the edge of the cover 210 is used to limit the movement of the wheelchair backrest in a direction parallel to the support surface 140 with the wheelchair backrest provided on the support surface 140. This limits the movement of the wheelchair backrest in the direction parallel to the support surface 140, thereby improving the stability of the wheelchair backrest. Furthermore, since the limiting portion 211 is directly formed from the edge of the cover 210, its inclusion does not increase the number of components involved in the wheelchair backrest. Therefore, the solution provided in this embodiment improves the stability of the wheelchair backrest without significantly increasing the assembly difficulty of the wheelchair backrest.

[0056] Optionally, the drive source 310 mentioned above is located inside the receiving cavity 220, thereby reducing the external influence on the drive source 310.

[0057] Optionally, the wheelchair backrest also includes a second threaded connector 230, through which the housing 210 and the body 100 are detachably connected, so as to facilitate individual replacement or maintenance of the housing 210 and the body 100.

[0058] In other embodiments, the edge of the cover 210 may not have a limiting portion 211. In this case, the edge of the cover 210 may be flush with the bearing surface 140, for example.

[0059] This application embodiment also provides a wheelchair, which includes a wheelchair body and the wheelchair backrest described above, with the main support portion 110 of the wheelchair backrest connected to the wheelchair body. Since the wheelchair provided in this application embodiment includes the wheelchair backrest described above, it has the same beneficial effects as the wheelchair backrest described above, and will not be repeated here.

[0060] Optionally, refer to Figure 1 As shown, the wheelchair also includes the aforementioned angle adjuster 320. The angle adjuster 320 is provided with a connecting seat 322, which is connected to the wheelchair body, thereby indirectly connecting the main support part 110 to the wheelchair body.

[0061] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A wheelchair backrest, characterized in that, The system includes a main body (100), which includes a main support part (110) and an auxiliary support part (120) that are separately arranged. The auxiliary support part (120) is located above the main support part (110) and is fixedly connected to the main support part (110). The auxiliary support part (120) and the main support part (110) together form a support surface (140).

2. The wheelchair backrest according to claim 1, characterized in that, The auxiliary support part (120) is a sheet metal part, and / or the main support part (110) is a die-cast part.

3. The wheelchair backrest according to claim 1, characterized in that, The main support portion (110) includes a first sub-part (111) and a second sub-part (112) connected to each other. The first sub-part (111) is located above the second sub-part (112) and is connected to the auxiliary support portion (120). In the direction perpendicular to the support surface (140), the thickness of the second sub-part (112) is greater than the thickness of the first sub-part (111).

4. The wheelchair backrest according to claim 3, characterized in that, The first sub-part (111) has a first groove (1111) on the side facing away from the bearing surface (140), and a first reinforcing rib (1112) is provided in the first groove (1111). And / or, the second sub-part (112) has a second groove (1121) on the side opposite to the bearing surface (140), and a second reinforcing rib (1122) is provided in the second groove (1121).

5. The wheelchair backrest according to claim 4, characterized in that, The number of the first reinforcing ribs (1112) is at least two, and the first reinforcing ribs (1112) are arranged in a cross pattern. The number of the second reinforcing ribs (1122) is at least two, and the second reinforcing ribs (1122) are arranged in a cross pattern.

6. The wheelchair backrest according to claim 1, characterized in that, A portion of the edge of the auxiliary support portion (120) is folded toward the direction away from the support surface (140) and forms at least two reinforcing flanges (121), each of the reinforcing flanges (121) being arranged at circumferential intervals along the auxiliary support portion (120).

7. The wheelchair backrest according to claim 6, characterized in that, The first edge (122) of the auxiliary support part (120) is disposed close to the main support part (110), and the first edge (122) is formed with the reinforcing flange (121), and the reinforcing flange (121) of the first edge (122) is in contact with and connected to the main support part (110).

8. The wheelchair backrest according to claim 1, characterized in that, The main support part (110) is connected to both the drive source (310) and the angle adjuster (320) of the wheelchair, so as to adjust the angle of the wheelchair backrest through the drive source (310) and the angle adjuster (320) connected by transmission. The main support part (110) is provided with a first positioning groove (113) and a second positioning groove (114). The first positioning groove (113) is used to accommodate the drive source (310) and is positioned and cooperates with the drive source (310). The second positioning groove (114) is used to accommodate the angle adjuster (320) and is positioned and cooperates with the angle adjuster (320).

9. The wheelchair backrest according to claim 1, characterized in that, The wheelchair backrest also includes a cover (210), which is fitted over the main body (100) and together with the side of the main body (100) facing away from the bearing surface (140) to form a receiving cavity (220). The edge of the cover (210) extends toward the bearing surface (140) and protrudes from the bearing surface (140) to form a limiting part (211). The limiting part (211) is used to limit the engagement with the wheelchair cushion provided on the bearing surface (140) in a direction parallel to the bearing surface (140).

10. A wheelchair, characterized in that, Includes a wheelchair body and a wheelchair backrest as described in any one of claims 1-9, wherein the main support portion (110) of the wheelchair backrest is connected to the wheelchair body.

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