Backrest for wheelchair

Abstract

The utility model provides a wheelchair backrest which comprises a universal headrest, a wheelchair supporting backrest body, a wheelchair back fixing and adjusting adapter and a wheelchair backrest cushion, the wheelchair supporting backrest body comprises two vertical adjusting vertical rods, the adjusting vertical rods are connected with a wheelchair backrest plate through the wheelchair back fixing and adjusting adapter, and the wheelchair backrest cushion is connected with the universal headrest. Two wheelchair back fixing and adjusting adapters are arranged on each adjusting vertical rod, the wheelchair backrest plate is made of aluminum alloy or engineering plastic materials, and a strip-shaped hollow limiting clamping groove is formed in the wheelchair backrest plate. According to the backrest for the wheelchair, the backrest plate and the supporting frame can be firmly connected to the supporting bottom plate through the wheelchair back fixing and adjusting adapter, stability can be kept when a user moves or the wheelchair is subjected to external force, the falling risk is reduced, meanwhile, the wheelchair back fixing and adjusting adapter is convenient to mount and dismount, and the use is convenient. Modularized production and assembly of the wheelchair backrest are realized.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, and in particular to a wheelchair backrest. Background Technology

[0002] Wheelchairs are tools that help the elderly and disabled move and exercise, serving as a means of transportation. The production and manufacturing of wheelchairs has become increasingly mature and modular. The backrest is an important component of a wheelchair, providing back support for the user, facilitating spinal exertion for the disabled and elderly, and achieving the goal of comfortable use. As a modular product, the wheelchair backrest needs to be mass-produced. The backrest angle can be adjusted according to the user's needs to adapt to the human body and provide better support and comfort.

[0003] Traditional wheelchair backrests use a fixed structure, which cannot be adapted to the installation of different manual and electric wheelchairs. In actual work, since disabled people have different heights, weights, and spinal positions, the wheelchair backrests need to be adjusted according to different people. To address this, our company has developed a backrest assembly. Our patented product can be adapted to more than 95% of the wheelchairs currently on the market. It can be adapted to wheelchairs with different back tube diameters, widths, and heights, and has achieved modular production of wheelchair backrests. Utility Model Content

[0004] To be compatible with over 95% of wheelchairs currently on the market, and to accommodate wheelchairs with different back tube diameters, widths, and heights, this utility model provides a wheelchair backrest. This backrest structure can accommodate wheelchair backrest fixing tube diameters of 19 mm, 22 mm, and 25 mm, wheelchair backrest widths of 380 mm to 520 mm, and wheelchair backrest heights of 300 mm to 900 mm.

[0005] This utility model is achieved by the following technical solution: a wheelchair backrest, comprising four components: a universal headrest, a wheelchair support backrest body, a wheelchair backrest fixing and adjusting adapter, and a wheelchair backrest cushion.

[0006] The versatile headrest has a two-layer structure: an inner rigid frame and an outer PU foam or sponge structure.

[0007] The universal headrest includes a headrest body, with a fixed base at the bottom. The fixed base is fixedly connected to the wheelchair backrest by screws. The upper part of the fixed base is a base support, and the upper part of the base support is connected to a universal adjustment component structure. The universal adjustment component structure includes a fixed crescent plate A and a fixed crescent plate B. Handles are respectively provided on fixed crescent plate A and fixed crescent plate B. Fixed crescent plate A is connected to the support column by fixing screws, and fixed crescent plate B is connected to the fixed seat on the headrest by fixing screws. There are a total of three fixing points. The three fixing points are locked and positioned by locking screws. Loosening the locking screws moves the three joints. The universal structure allows the joints on the headrest to be adjusted to any suitable position in terms of front-back, back-to-back, up-down and down angles.

[0008] The headrest is connected to the fixed crescent plate B via a fixed end. The headrest has an ergonomic and humanized design with a concave center and protrusions on both sides to fix the head in the middle. People of different body types can adjust the joint structure of the universal adjustable headrest to find a suitable headrest position.

[0009] The wheelchair support backrest body includes two vertical adjustment rods. The adjustment rods are connected to the wheelchair backrest panel via wheelchair backrest fixing adjustment adapters. There are four wheelchair backrest fixing adjustment adapters, with two wheelchair backrest fixing adjustment adapters on each adjustment rod. The wheelchair backrest panel is made of aluminum alloy or engineering plastic material, and a strip-shaped hollow limiting groove is provided on the wheelchair backrest panel.

[0010] The hollow limiting slot is the invention feature of this utility model for a wheelchair backrest. The hollow limiting slot has an elliptical structure and adopts two modes: one is a horizontal long row of holes, and the other is a vertical long row of holes. The fixing buckle is set on the adjustment rod. The height of the wheelchair backrest can be adjusted by adjusting the position of the fixing buckle, or the height of the wheelchair backrest can be adjusted by adjusting the wheelchair backrest fixing adjustment adapter.

[0011] The wheelchair backrest is also equipped with headrest adjustment holes. The universal headrest can be fixed by bolts passing through the headrest adjustment holes and the screw holes of the fixing base. The height of the universal headrest can be adjusted by adjusting the position of the universal headrest in the headrest adjustment holes.

[0012] The wheelchair backrest fixing and adjusting adapter includes a fixing buckle and a rotating buckle. The fixing buckle is connected to a fixing frame, which has a T-shaped cross-section. The other end of the fixing frame is fixed to the wheelchair backrest. The fixing buckle is provided with fixing buckle bolt holes. The buckle is connected to a locking fixing panel by bolts, and the locking fixing panel is fixed to the position of the wheelchair backrest.

[0013] A cavity is provided between the fixed buckle and the rotating buckle, and the adjusting rod passes through the cavity. By changing the size of different fixed buckles and rotating buckles, it can accommodate adjusting rods of different diameters. The fixed buckle and rotating buckle adopt a semi-circular structure. A fixed buckle protrusion is provided on the inner cavity of the fixed buckle, and a rotating buckle protrusion is provided on the inner cavity of the rotating buckle. The protrusions increase the friction between the adjusting rod and the fixed buckle and rotating buckle, thereby achieving the purpose of stability.

[0014] The fixing buckle is provided with a fixing buckle groove, and the fixing frame is connected between the fixing buckle groove by bolts. The angle between the fixing frame and the fixing buckle groove can be adjusted. By adjusting the angle, the position of the wheelchair back can be adjusted forward and backward. By adjusting the position of the rotating buckle on the adjusting rod, the forward and backward position and the forward and backward tilt angle of the wheelchair back can be adjusted.

[0015] The wheelchair backrest cushion is made of wear-resistant, high-resilience fabric or PU flame-retardant leather. The wheelchair backrest cushion is fixedly connected to the front of the wheelchair backrest panel, and the interior of the wheelchair backrest cushion has ventilation holes.

[0016] This utility model discloses a wheelchair backrest that uses a wheelchair backrest fixing and adjustment adapter to firmly connect the backrest panel and support frame to the support base plate. This ensures stability even when the user moves or the wheelchair is subjected to external forces, reducing the risk of tipping over. This utility model has a wide range of applications, adapting to wheelchair backrest widths of 380mm-520mm and backrest heights of 300mm-900mm. At the same time, the backrest fixing and adjustment adapter is easy to install and remove, realizing modular production and assembly of wheelchair backrests. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a wheelchair backrest according to the present invention. Figure 1 ;

[0018] Figure 2 This is a backrest view of a wheelchair according to the present invention;

[0019] Figure 3 This is a schematic diagram of the headrest body structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the wheelchair backrest fixing and adjusting adapter of this utility model;

[0021] Figure 5 This is a side view of a wheelchair backrest according to the present invention.

[0022] Figure 6 This is an enlarged view of the chair backrest adjustment adapter;

[0023] Figure 7 This is a schematic diagram showing the connection between the chair back fixing and adjustment adapter and the adjustment rod;

[0024] Figure 8 This is a schematic diagram showing the combination of fixed and rotating buckles;

[0025] Figure 9 This is a schematic diagram of the limit slot lateral movement adjustment structure;

[0026] Figure 10 This is a schematic diagram of the vertical movement adjustment structure of the limit slot;

[0027] Figure 11 A diagram illustrating the adjustment of the wheelchair backrest position.

[0028] Explanation of key symbols:

[0029] 1_1 is the headrest body, 1_2 is the fixed base, 1_3 is the base support, 1_4 is the fixed crescent plate A, 1_5 is the fixed crescent plate B, 1_6 is the handle, 1_7 is the stop bolt, 1_8 is the headrest support plate, and 1_9 is the headrest adjustment hole.

[0030] 2_2 Adjustable uprights, 2_3 Wheelchair backrest, 2_4 Limiting slots;

[0031] 3_1 Fixed buckle, 3_2 Rotary buckle, 3_3 Fixed bracket, 3_4 Fixed panel, 3_5 Fixed buckle groove, 3_6 Fixed buckle bolt hole, 3_7 Fixed buckle protrusion, 3_8 Rotary buckle bolt hole;

[0032] 4_1 is the wheelchair backrest cushion, and 4_2 is the ventilation hole. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0034] Example:

[0035] A wheelchair backrest comprises four components: a universal headrest, a wheelchair support backrest body, a wheelchair backrest fixing and adjustment adapter, and a wheelchair backrest cushion.

[0036] The versatile headrest has a two-layer structure: an inner rigid frame and an outer PU foam or sponge structure.

[0037] The universal headrest includes a headrest body 1_1, with a fixed base 1_2 at the bottom. The fixed base 1_2 is fixedly connected to the wheelchair backrest by screws. The upper part of the fixed base 1_2 is a base support 1_3, and the upper part of the base support 1_3 is connected to a universal adjustment component structure. The universal adjustment component structure includes a fixed crescent plate A and a fixed crescent plate B. Handles 1_6 are respectively provided on the fixed crescent plate A and the fixed crescent plate B. The fixed crescent plate A is connected to the support column by fixing screws, and the fixed crescent plate B is connected to the fixed seat on the headrest by fixing screws. There are a total of three fixing points. The three fixing points are locked and positioned by locking screws. Loosening the locking screws allows the three joints to be moved. The universal structure allows the joints on the headrest to be adjusted to any suitable position in terms of front-back, back-up, and down angles.

[0038] The headrest is connected to the fixed crescent plate B via a fixed end. The headrest has an ergonomic and humanized design with a concave center and protrusions on both sides to fix the head in the middle. People of different body types can adjust the joint structure of the universal adjustable headrest to find a suitable headrest position.

[0039] The wheelchair support backrest body includes two vertical adjustment rods 2_2. The adjustment rods 2_2 are connected to the wheelchair backrest panel through wheelchair backrest fixing adjustment adapters. There are 4 wheelchair backrest fixing adjustment adapters, with 2 wheelchair backrest fixing adjustment adapters on each adjustment rod 2_2. The wheelchair backrest panel is made of aluminum alloy or engineering plastic material, and a strip-shaped hollow limiting slot is provided on the wheelchair backrest panel.

[0040] The hollow limiting slot is the invention feature of this utility model for a wheelchair backrest. The hollow limiting slot has an elliptical structure and adopts two modes: one is a horizontal long row of holes, and the other is a vertical long row of holes. The fixing buckle is set on the adjustment rod. The height of the wheelchair backrest can be adjusted by adjusting the position of the fixing buckle, or the height of the wheelchair backrest can be adjusted by adjusting the wheelchair backrest fixing adjustment adapter.

[0041] The wheelchair backrest 2_3 is also equipped with a headrest adjustment hole 1_9. The headrest body 1_1 can be fixed by passing bolts through the headrest adjustment hole and the screw hole of the fixing base. The height of the headrest body 1_1 can be adjusted by adjusting the position of the universal headrest in the headrest adjustment hole.

[0042] The wheelchair backrest fixing and adjusting adapter includes a fixing buckle 3_1 and a rotating buckle 3_2. The fixing buckle 3_1 is connected to a fixing frame 3_3. The fixing frame 3_3 has a T-shaped cross-section. The other end of the fixing frame 3_3 is fixed to the wheelchair backrest. The fixing buckle 3_1 is provided with fixing buckle bolt holes 3_6. The buckle is fixed to the locking fixing panel 3_4 by bolts, and is fixed to the position of the wheelchair backrest by the locking fixing panel 3_4.

[0043] A cavity is provided between the fixed buckle 3_1 and the rotating buckle 3_2, and the adjusting rod passes through the cavity. By changing the size of different fixed buckles 3_1 and rotating buckles, adjusting rods of different diameters can be adapted. The fixed buckle 3_1 and rotating buckle 3_2 adopt a semi-circular structure. A fixed buckle protrusion 3_7 is provided on the inner cavity of the fixed buckle 3_1, and a rotating buckle protrusion is provided on the inner cavity of the rotating buckle 3_2. The protrusions increase the friction between the adjusting rod and the fixed buckle and the rotating buckle, thereby achieving the purpose of stability.

[0044] The fixing buckle is provided with fixing buckle groove 3_5. The fixing frame is connected between the fixing buckle groove by bolts. The angle between the fixing frame and the fixing buckle groove 3_5 can be adjusted. By adjusting the angle, the position of the wheelchair back can be adjusted forward and backward. By adjusting the position of the rotating buckle on the adjusting rod, the forward and backward position and the forward and backward tilt angle of the wheelchair back can be adjusted.

[0045] The wheelchair backrest cushion 4_1 is constructed using a wear-resistant, high-resilience fabric cover or a flame-retardant PU leather cover. The wheelchair backrest cushion 4_1 is fixedly connected to the front of the wheelchair backrest panel. Ventilation holes 4_2 are provided inside the wheelchair backrest cushion 4_1. The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A wheelchair backrest, characterized in that, The product comprises four components: a universal headrest, a wheelchair support backrest body, a wheelchair backrest fixing and adjustment adapter, and a wheelchair backrest cushion. The universal headrest has a two-layer structure, with an inner rigid frame and an outer PU foam or sponge structure. The wheelchair support backrest body includes two vertical adjustment rods, which are connected to the wheelchair backrest panel via wheelchair backrest fixing and adjustment adapters. There are four wheelchair backrest fixing and adjustment adapters, with two adapters on each adjustment rod. The wheelchair backrest panel is made of aluminum alloy or engineering plastic material and features a strip-shaped hollow limiting groove.

2. A wheelchair backrest according to claim 1, characterized in that: The universal headrest includes a headrest body, with a fixed base at the bottom. The fixed base is fixedly connected to the wheelchair backrest by screws. The upper part of the fixed base is a base support, and the upper part of the base support is connected to a universal adjustment component structure. The universal adjustment component structure includes a fixed crescent plate A and a fixed crescent plate B. Handles are respectively provided on the fixed crescent plate A and the fixed crescent plate B. The fixed crescent plate A is connected to the support column by fixing screws, and the fixed crescent plate B is connected to the fixed seat on the headrest by fixing screws. There are a total of three fixing points, which are locked and positioned by locking screws.

3. A wheelchair backrest according to claim 2, characterized in that: The headrest is connected to the fixed crescent plate B via a fixed end, with a headrest concave part in the middle and headrest protrusions on both sides.

4. A wheelchair backrest according to claim 1, characterized in that: The hollow limiting slot has an elliptical structure and adopts two modes: one is a horizontal long row of holes, and the other is a vertical long row of holes. The fixing buckle is set on the adjusting rod.

5. A wheelchair backrest according to claim 4, characterized in that: The wheelchair backrest is also equipped with headrest adjustment holes. The universal headrest can be fixed by bolts passing through the headrest adjustment holes and the screw holes of the fixing base. The height of the universal headrest can be adjusted by adjusting the position of the universal headrest in the headrest adjustment holes.

6. A wheelchair backrest according to claim 1, characterized in that: The wheelchair backrest fixing and adjusting adapter includes a fixing buckle and a rotating buckle. The fixing buckle is connected to a fixing frame, which has a T-shaped cross-section. The other end of the fixing frame is fixed to the wheelchair backrest. The fixing buckle is provided with fixing buckle bolt holes. The buckle is connected to a locking fixing panel by bolts, and the locking fixing panel is fixed to the position of the wheelchair backrest.

7. A wheelchair backrest according to claim 6, characterized in that: A cavity is provided between the fixed buckle and the rotating buckle, and the adjusting rod passes through the cavity. By changing the size of different fixed buckles and rotating buckles, it can be adapted to adjusting rods of different diameters. The fixed buckle and the rotating buckle adopt a semi-circular structure. A fixed buckle protrusion is provided on the inner cavity of the fixed buckle, and a rotating buckle protrusion is provided on the inner cavity of the rotating buckle.

8. A wheelchair backrest according to claim 7, characterized in that: The fixing buckle is provided with fixing buckle grooves, and the fixing bracket is connected between the fixing buckle grooves by bolts.

9. A wheelchair backrest according to claim 1, characterized in that: The wheelchair backrest cushion is made of wear-resistant, high-resilience fabric or PU flame-retardant leather. The wheelchair backrest cushion is fixedly connected to the front of the wheelchair backrest panel, and the interior of the wheelchair backrest cushion has ventilation holes.

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