Handrail lift structure and wheelchair

Abstract

The present disclosure provides a handrail lifting structure and a wheelchair. The handrail lifting structure comprises a guard plate, a surface of the guard plate being provided with a sliding groove along a vertical direction; a lifting rod, an end of the lifting rod being formed with a handrail part, the lifting rod being movably accommodated in the sliding groove along the vertical direction; a knob assembly connected with the lifting rod, the knob assembly having an unlocked state and a locked state; when the knob assembly is in the unlocked state, the lifting rod moves up and down in the sliding groove along the vertical direction; when the knob assembly is in the locked state, the lifting rod is locked at a set position of the sliding groove. The present application provides a handrail lifting structure, which can realize the up-and-down movement of the lifting rod along the vertical direction, and when the knob assembly is in the unlocked state, the lifting rod can move up and down in the sliding groove, and when the knob assembly is in the locked state, the lifting rod can be locked at the set position, thereby meeting the comfort of use of people of different heights.

Description

Technical Field

[0001] This disclosure relates to the field of wheelchair armrest technology, and more particularly to an armrest lifting structure and a wheelchair. Background Technology

[0002] For elderly people with limited mobility or patients with temporary functional impairments, wheelchairs are indispensable assistive tools in daily life. However, wheelchairs with fixed armrests make it inconvenient for passengers to transfer and are not suitable for people of all heights. Currently, most armrest lifting structures in the industry are assembled using tubing and other materials, resulting in a relatively loose and unstable overall structure. Utility Model Content

[0003] This disclosure provides an armrest lifting structure and a wheelchair to at least solve one of the technical problems existing in the prior art.

[0004] In a first aspect, this application provides a handrail lifting structure, comprising:

[0005] A protective plate, wherein a groove is formed on the surface of the protective plate along the vertical direction;

[0006] A lifting rod, the end of which is formed with a handrail, and the lifting rod is movably accommodated in the slide groove in the vertical direction;

[0007] A knob assembly is connected to the lifting rod, and the knob assembly has an unlocked state and a locked state; when the knob assembly is in the unlocked state, the lifting rod moves up and down vertically within the slide groove; when the knob assembly is in the locked state, the lifting rod is locked at a set position in the slide groove.

[0008] In one embodiment, the slide groove is provided with a plurality of first mounting holes spaced apart along the vertical direction, the lifting rod is provided with a second mounting hole, and the knob assembly is connected to the first mounting holes and the second mounting holes.

[0009] In one possible implementation, the knob assembly includes:

[0010] A pull pin, the first end of which passes through the second mounting hole and is threadedly connected to the first mounting hole;

[0011] An elastic element is disposed in the second mounting hole and sleeved on the outside of the pull pin, with both ends of the elastic element pressing against the second mounting hole and the first end of the pull pin, respectively.

[0012] In one embodiment, the knob assembly further includes a knob disposed outside the lifting rod and fixedly connected to the second end of the pull pin.

[0013] In one embodiment, the first end of the pull pin has a chamfered structure.

[0014] In one embodiment, the first end of the pull pin is configured as a stepped structure so that the first end of the elastic member abuts against the stepped structure.

[0015] In one embodiment, the second mounting hole is configured as a stepped shaft hole so that the second end of the elastic element abuts against the stepped shaft hole.

[0016] In one possible implementation, the elastic element is a spring.

[0017] In one embodiment, the handrail lifting structure includes a handrail connected to the lifting rod, and the handrail surface forms the handrail portion.

[0018] Secondly, this application provides a wheelchair, including a wheelchair body and an armrest lifting structure as described in any of the above-described embodiments, wherein the wheelchair body and the armrest lifting structure are detachably connected.

[0019] Compared with existing technologies, the advantages of this application are as follows: This application provides a handrail lifting structure, which, by setting a guard plate, lifting rod, knob assembly, and handrail, enables the handrail and lifting rod to move up and down synchronously in the vertical direction. When the knob assembly is in the unlocked state, the lifting rod can move up and down within a groove, thereby adjusting the height of the handrail. When the knob assembly is in the locked state, the lifting rod can be locked in a set position, meeting the comfort needs of users of different heights. The use of a guard plate, lifting rod, and handrail gives the entire handrail lifting structure good integrity and structural strength, and the entire handrail lifting structure is simple, convenient, and stable.

[0020] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0021] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of this disclosure are illustrated in the drawings by way of example and not limitation, in which:

[0022] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0023] Figure 1 A schematic diagram of the overall structure of the handrail lifting structure according to an embodiment of the present disclosure is shown;

[0024] Figure 2An exploded view of the handrail lifting structure according to an embodiment of the present disclosure is shown;

[0025] Figure 3 A cross-sectional view of the handrail lifting structure according to an embodiment of the present disclosure is shown;

[0026] Figure 4 It shows Figure 3 A magnified view of a portion of the image.

[0027] The numbers in the diagram are explained as follows: 1-Guard plate, 2-Lifting rod, 3-Knob assembly, 4-Handrail, 11-Slide groove, 21-Second mounting hole, 31-Pull pin, 32-Elastic element, 33-Knob, 34-Pin, 111-First mounting hole. Detailed Implementation

[0028] To make the objectives, features, and advantages of this disclosure more apparent and understandable, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0029] Firstly, such as Figure 1-4 As shown, this application provides a handrail lifting structure, including:

[0030] The protective plate 1 has a groove 11 formed on its surface along the vertical direction;

[0031] The lifting rod 2 has a handrail at its end and is movably accommodated in the slide groove 11 along the vertical direction.

[0032] The knob assembly 3 is connected to the lifting rod 2. The knob assembly 3 has an unlocked state and a locked state. When the knob assembly 3 is in the unlocked state, the lifting rod 2 moves up and down vertically in the slide groove 11. When the knob assembly 3 is in the locked state, the lifting rod 2 is locked in the set position of the slide groove 11.

[0033] For example, such as Figure 1-2 As shown, the guard plate 1 is generally plate-shaped. When this armrest lifting structure is applied to a wheelchair, it is detachably connected to the wheelchair body via the guard plate 1, thus enabling the installation of the armrest lifting structure and the wheelchair body. The plate-shaped guard plate 1 provides a stable support base for the armrest lifting structure, and the lifting of the armrest and lifting rod can be achieved simply by using the lifting rod and knob assembly. The entire armrest lifting structure is simple, strong, and stable.

[0034] For example, such as Figure 2As shown, the slide 11 has a T-shaped structure, and the lifting rod 2 also has a T-shaped structure, which is adapted to the slide 11 so that the lifting rod 2 can only move up and down within the slide 11.

[0035] For example, such as Figure 2 As shown, the handrail lifting structure includes a handrail 4, which is connected to the lifting rod 2, and a handrail portion is formed on the surface of the handrail 4.

[0036] This application provides a handrail lifting structure. By setting a guard plate 1, a lifting rod 2, a knob assembly 3, and a handrail 4, the handrail and lifting rod can move up and down synchronously in the vertical direction. When the knob assembly is in the unlocked state, the lifting rod can move up and down within a groove, thereby adjusting the height of the handrail 4. When the knob assembly is in the locked state, the lifting rod 2 and the handrail 4 can be locked in a set position to meet the comfort needs of people of different heights. The use of a guard plate, lifting rod, and handrail makes the entire handrail lifting structure have good integrity and structural strength, and the entire handrail lifting structure is simple, convenient, and stable.

[0037] In one possible implementation, such as Figure 3-4 As shown, the slide 11 has a plurality of first mounting holes 111 spaced apart along the vertical direction, the lifting rod 2 has a second mounting hole 21, and the knob assembly 3 is connected to the first mounting hole 111 and the second mounting hole 21.

[0038] Furthermore, such as Figure 4 As shown, the knob assembly 3 includes:

[0039] Pull pin 31, the first end of pull pin 31 passes through the second mounting hole 21 and is threadedly connected to the first mounting hole 111;

[0040] The elastic element 32 is disposed inside the second mounting hole 21 and sleeved on the outside of the pull pin 31. The two ends of the elastic element 32 press against the second mounting hole 21 and the first end of the pull pin 31, respectively.

[0041] For example, the outer surface of the first end of the pull pin 31 is provided with an external thread, and the inner surface of the first mounting hole 111 is formed with an internal thread that matches the external thread, so that the first end of the pull pin 31 is threadedly connected to the first mounting hole 111. For example, the internal thread formed on the inner surface of the first mounting hole 111 can be formed by directly machining the thread on the inner surface of the first mounting hole; or, a nut that matches the first end of the pull pin can be fixedly installed at the bottom of the first mounting hole, so that the first mounting hole and the nut form an integral part, and then the internal thread is formed in the first mounting hole, thereby realizing the threaded connection with the first end of the pull pin 31.

[0042] For example, elastic element 32 is a spring.

[0043] For example, the knob assembly 3 also includes a knob 33, which is located outside the lifting rod 2 and is fixedly connected to the second end of the pull pin 31. Specifically, the second end of the pull pin 31 has a pin hole, and a corresponding pin hole is also provided on the knob 33. A pin 34 passes through the pin hole to fix the second end of the pull pin 31 to the knob 33. By rotating the knob 33, the pull pin 31 is rotated synchronously, and the first end of the pull pin 31 can be locked or unlocked with the internal thread of the first mounting hole. When in the locked state, the two ends of the elastic member 32 form an elastic resistance force against the first end of the pull pin 31 to ensure a stable connection between the pull pin and the first mounting hole. When rotated in the opposite direction, the knob 33 is pulled outward, causing the first end of the pull pin 31 to disengage from the first mounting hole 111 and be accommodated in the second mounting hole 21. This compresses the elastic element 32 and presses against the first end of the pull pin 31, fully unlocking the lifting rod 2. This allows the lifting rod to move up and down vertically within the slide groove. When the lifting rod 2 reaches a certain position in the second mounting hole, the first end of the pull pin 31 aligns with the first mounting hole 111 and automatically springs into the first mounting hole 111 under the elastic force of the elastic element 32, aligning with the internal thread of the first mounting hole. Then, rotating the knob 33 locks the lifting rod to the set height.

[0044] For example, such as Figure 4 As shown, the first end of the pull pin 31 has a chamfered structure. This chamfered structure enables the first end of the pull pin to automatically align with the first mounting hole, so that the first end of the pull pin 31 is threadedly connected to the first mounting hole 111.

[0045] For example, such as Figure 4 As shown, the first end of the pull pin 31 is constructed as a stepped structure so that the first end of the elastic member 32 presses against the stepped structure. As a result, the shape of the first mounting hole 111 is adaptively opened according to the first end of the pull pin 31, and thus matches the first end of the pull pin.

[0046] For example, such as Figure 4 As shown, the second mounting hole 21 is configured as a stepped shaft hole so that the second end of the elastic member 32 presses against the stepped shaft hole.

[0047] Secondly, this application also provides a wheelchair, including a wheelchair body and the aforementioned armrest lifting structure, wherein the wheelchair body and the armrest lifting structure are detachably connected. The wheelchair with the armrest lifting structure of this application can also achieve stable lifting of the lifting rod 2, while ensuring good integrity and high structural strength of the guard plate 1 and armrest 4.

[0048] The working process of the handrail lifting structure of this application will be further explained below:

[0049] While rotating the knob 33, pull the knob 33 outward to disengage the first end of the pull pin 31 from the first mounting hole 111 and into the second mounting hole 21. At this time, the elastic element 32 (e.g., a spring) is in a compressed state, and the two ends of the elastic element 32 press against the second mounting hole 21 and the first end of the pull pin 31, respectively. The lifting rod 2 is fully unlocked. Then, pull the handrail 4 up and down in the vertical direction, and simultaneously drive the lifting rod 2 to move up and down until the first end of the pull pin 31 is aligned with the first mounting hole 111. Under the elastic force of the elastic element 32, the first end of the pull pin 31 is automatically pushed into the first mounting hole 111 and aligned with the internal thread of the first mounting hole. Then, rotate the knob 33 again to lock the first end of the pull pin 31 with the internal thread of the first mounting hole 111. The lifting rod 2 is locked at the set height. At this time, the two ends of the elastic element 32 press against the second mounting hole 21 and the first end of the pull pin 31, respectively.

[0050] It should be understood that the various forms of processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and this is not limited herein.

[0051] Furthermore, the terms "first" and "second" 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, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A handrail lifting structure, characterized in that: include: A protective plate (1) has a groove (11) formed on its surface along the vertical direction; The lifting rod (2) has a handrail at its end and is movably accommodated in the slide groove (11) in the vertical direction. A knob assembly (3) is connected to the lifting rod (2). The knob assembly (3) has an unlocked state and a locked state. When the knob assembly (3) is in the unlocked state, the lifting rod (2) moves up and down in the vertical direction within the slide groove (11). When the knob assembly (3) is in the locked state, the lifting rod (2) is locked in the set position of the slide groove (11).

2. The handrail lifting structure according to claim 1, characterized in that: The slide (11) has a plurality of first mounting holes (111) spaced apart along the vertical direction, the lifting rod (2) has a second mounting hole (21), and the knob assembly (3) is connected to the first mounting hole (111) and the second mounting hole (21).

3. The handrail lifting structure according to claim 2, characterized in that: The knob assembly (3) includes: Pull pin (31), the first end of the pull pin passes through the second mounting hole and is threadedly connected to the first mounting hole; An elastic element (32) is disposed in the second mounting hole and sleeved on the outside of the pull pin. The two ends of the elastic element (32) press against the second mounting hole and the first end of the pull pin, respectively.

4. The handrail lifting structure according to claim 3, characterized in that: The knob assembly (3) further includes a knob (33) located outside the lifting rod (2) and the knob is fixedly connected to the second end of the pull pin.

5. The handrail lifting structure according to claim 3, characterized in that: The first end of the pull pin (31) has a chamfered structure.

6. The handrail lifting structure according to claim 3, characterized in that: The first end of the pull pin (31) is configured as a stepped structure so that the first end of the elastic member (32) presses against the stepped structure.

7. The handrail lifting structure according to claim 6, characterized in that: The second mounting hole (21) is configured as a stepped shaft hole so that the second end of the elastic element (32) presses against the stepped shaft hole.

8. The handrail lifting structure according to claim 3, characterized in that: The elastic element (32) is a spring.

9. The handrail lifting structure according to any one of claims 1-8, characterized in that: The handrail lifting structure includes a handrail (4), which is connected to the lifting rod (2), and the handrail part is formed on the surface of the handrail (4).

10. A wheelchair, comprising a wheelchair body, characterized in that: It also includes the armrest lifting structure as described in any one of claims 1-9, wherein the wheelchair body is detachably connected to the armrest lifting structure.

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