Sunshade device for electric wheelchair vehicle

Abstract

The application relates to a sunshade device for an electric wheelchair, which is convenient to store and comprises a supporting frame, a folding mechanism and a driving assembly. The folding mechanism is composed of multiple articulated frame units, stable unfolding and storage are realized through the cooperation of a connecting rod set and a sliding guide rail, a sunshade cloth reel is combined with a torsion spring to realize automatic winding, an auxiliary supporting assembly enhances stability, and the driving assembly is combined with a control panel to realize intelligent operation. Through optimization of the structural design, the sunshade device of the utility model solves the problems of large space occupation and inconvenient operation in the prior art, significantly improves the space adaptability and use convenience of the wheelchair, and meets the requirements of equipment lightness, compactness and intelligence.

Description

Technical Field

[0001] This utility model belongs to the technical field of electric wheelchair auxiliary equipment, specifically a sunshade device for electric wheelchairs that is easy to store. Background Technology

[0002] With the continuous development of the electric wheelchair industry, intelligent and user-friendly functions have gradually become important directions in product design. Sunshades, as a crucial component for improving user comfort outdoors, have begun to be used in some high-end electric wheelchairs. However, existing sunshades mostly focus on achieving basic sunshade functions, while generally lacking sufficient consideration for portability and ease of storage in their structural design. This results in them occupying a large space when not in use, affecting the overall compactness and mobility of the wheelchair.

[0003] A search revealed a patent for a smart wheelchair with nursing functions, publication number CN109602550B, published on June 18, 2024. This patent describes a wheelchair with a sunshade mounted on the upper part of the movable frame, providing sun protection and improving outdoor comfort. However, this sunshade is a fixed structure with no adjustable position or angle, and lacks folding or storage functionality. When the wheelchair is indoors or when sun protection is not needed, the device remains extended, protruding above the wheelchair, making it highly susceptible to collisions with other objects. This not only affects traffic safety but also significantly increases the overall storage space required. Furthermore, the sunshade lacks a linkage design with the wheelchair's multi-functional structure (such as reclining and turning functions), failing to automatically adapt or retract when the wheelchair's posture changes, further limiting its practicality.

[0004] Currently, no other valid patent documents have been found that explicitly address "sunshade devices for electric wheelchairs" and possess storage functionality. Therefore, based on the analysis of existing technical solutions, the sunshade device disclosed in CN109602550B represents the main direction of current integrated sunshade technology for wheelchairs, but it has significant shortcomings in terms of structural mobility, spatial adaptability, and ease of use.

[0005] The aforementioned issues indicate that existing sunshades for electric wheelchairs generally remain at a basic protective level, failing to meet users' actual needs for lightweight, compact, and intelligent operation. Especially in scenarios involving frequent switching between indoor and outdoor use, the lack of a sunshade structure that is easy to store and can be quickly deployed and retracted has become a key factor restricting the improvement of user experience. Therefore, there is an urgent need for a sunshade device for electric wheelchairs that is structurally sound, easy to operate, and efficiently retractable to fill the existing technological gap and enhance the product's practicality and market competitiveness.

[0006] The present invention aims to provide a sunshade device for electric wheelchairs that is easy to store. By optimizing the support structure and transmission mechanism, the sunshade components can be automatically extended or folded for storage, effectively reducing the space occupied when not in use and enhancing the overall portability and environmental adaptability of the wheelchair. Utility Model Content

[0007] This utility model relates to a sunshade device for an electric wheelchair that is easy to store, including a support frame, a folding mechanism, and a drive assembly. The support frame is fixedly installed at the rear of the wheelchair body. The folding mechanism is provided within the support frame, and one end of the folding mechanism is connected to the drive assembly. The folding mechanism includes a folding skeleton, a sliding rail, a linkage group, and a locking element. The folding skeleton is composed of multiple hinged skeleton units connected by hinges. The sliding rail is fixed to the inner walls of both sides of the support frame, and the inner wall of the sliding rail has a guide groove. One end of the linkage group is hinged to the outside of the skeleton unit, and the other end is slidably connected to the guide groove of the sliding rail. The locking element is used to restrict the position of the skeleton unit. The drive assembly includes a motor, a transmission gear, and a rack. The motor is fixedly installed at the bottom of the support frame. The top of the output shaft of the motor is fixedly connected to the transmission gear, which is meshed with one side of the rack. The other end of the rack is hinged to the middle of the linkage group.

[0008] The top of the support frame is symmetrically fixed with a fixing seat. A sunshade cloth roll is hinged to the outside of the fixing seat. Sunshade cloth is wound around the outer wall of the sunshade cloth roll. One end of the sunshade cloth is fixed to the top of the folding frame. Torsion springs are provided at both ends of the sunshade cloth roll. One end of the torsion spring is fixed to the outer wall of the fixing seat, and the other end is fixed to the outer wall of the sunshade cloth roll. A limit block is provided on the outside of the sunshade cloth roll to prevent the sunshade cloth from shifting during the winding process.

[0009] A storage slot is provided on one side of the support frame. A cushioning pad is fixed to the inner wall of the storage slot. The cushioning pad is made of elastic material and has anti-slip texture on its surface. An automatic latch is installed at the opening of the storage slot. One end of the automatic latch is hinged to the inner wall of the storage slot, and the other end is connected to the outer wall of the support frame by magnetic adsorption.

[0010] The bottom of the folding frame is provided with an auxiliary support assembly, which includes a telescopic rod, a support foot, and an adjustment knob. One end of the telescopic rod is hinged to the bottom of the folding frame, and the other end is fixed to the support foot. The outer wall of the telescopic rod is provided with a threaded section, and the adjustment knob is threadedly connected to the threaded section of the telescopic rod. The adjustment knob is used to adjust the length of the telescopic rod.

[0011] A control panel is installed on one side of the drive assembly. Operation buttons are distributed on the outer wall of the control panel. The operation buttons are connected to the input terminal of the motor through a circuit. A microprocessor is integrated inside the control panel. The microprocessor is used to receive external signals and control the start and stop of the motor.

[0012] The hinge portion of the folding frame is provided with a lubrication sleeve. The inner wall of the lubrication sleeve is coated with a lubricating coating with a low coefficient of friction. The outer wall of the lubrication sleeve is provided with a dust cover to prevent dust from entering the hinge portion.

[0013] A reinforcing rib is provided in the middle of the connecting rod assembly. The two ends of the reinforcing rib are welded to the inner wall of the connecting rod assembly. The reinforcing rib is made of high-strength aluminum alloy, and its surface is anodized to improve its corrosion resistance.

[0014] The outer surface of the sunshade fabric is coated with an anti-ultraviolet coating with a thickness of 0.1 mm to 0.2 mm. The inner surface of the sunshade fabric is provided with a heat insulation layer made of polyurethane foam with a thickness of 1 mm to 2 mm.

[0015] This invention utilizes a folding mechanism to allow the sunshade to be quickly stored in the support frame's storage slot when not in use, significantly reducing space occupation and improving the overall compactness of the wheelchair. The hinge connection of the folding frame and the cooperation between the linkage assembly and the sliding guide rail ensure the stability and reliability of the sunshade during unfolding and folding. The design of the sunshade fabric roll combined with a torsion spring enables automatic roll-up of the sunshade fabric, avoiding the hassle of manual operation. The auxiliary support components enhance the stability of the sunshade in the unfolded state, making it particularly suitable for use in various terrain conditions. The integration of the drive component and control panel provides an intelligent operation method, allowing users to easily unfold and fold the sunshade using the operation buttons.

[0016] This invention solves the problems of large space occupation and inconvenient operation of existing sunshade devices. At the same time, by optimizing the structural design, it improves the spatial adaptability and ease of use of the sunshade device, and meets users' needs for lightweight, compact and intelligent equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the outer structure of the motor of this utility model.

[0019] Figure 3 This is a schematic diagram of the outer structure of the folding frame of this utility model.

[0020] Figure 4 for Figure 1 A magnified diagram of region A.

[0021] The attached diagram is labeled as follows: 1. Support frame; 2. Folding frame; 3. Sliding guide rail; 4. Linkage group; 5. Shade cloth roll; 6. Torsion spring; 7. Limiting block; 8. Storage slot; 9. Buffer pad; 10. Automatic lock; 11. Motor; 12. Transmission gear; 13. Rack; 14. Control panel; 15. Shade cloth. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Specific implementation examples are given below.

[0024] This utility model relates to a sunshade device for electric wheelchairs that is easy to store, and its structure is as follows: Figures 1 to 4 As shown, the system includes components such as a support frame 1, a folding mechanism, a drive assembly, and a sunshade fabric roll 5. The specific composition, connection relationships, and operating principles of each component are described in detail below with reference to the accompanying drawings.

[0025] The support frame 1 is fixedly installed at the rear of the wheelchair body. A mounting base is symmetrically fixed to its top. A sunshade roll 5 is hinged to the outside of the mounting base. Sunshade cloth 15 is wound around the outer wall of the sunshade roll 5, with one end of the sunshade cloth 15 fixed to the top of the folding frame 2. Torsion springs 6 are installed at both ends of the sunshade roll 5. One end of the torsion spring 6 is fixed to the outer wall of the mounting base, and the other end is fixed to the outer wall of the sunshade roll 5. A limiting block 7 is also installed on the outside of the sunshade roll 5. The limiting block 7 is fixed to both ends of the sunshade roll 5 with bolts to prevent the sunshade cloth 15 from shifting during winding. A storage groove 8 is opened on one side of the support frame 1. A cushioning pad 9 is fixed to the inner wall of the storage groove 8. The cushioning pad 9 is made of elastic material with anti-slip texture to reduce impact and vibration when the sunshade device is stored. An automatic locking buckle 10 is installed at the opening of the storage slot 8. One end of the automatic locking buckle 10 is hinged to the inner wall of the storage slot 8, and the other end is connected to the outer wall of the support frame 1 by magnetic adsorption, so as to ensure the stability of the sunshade device after it is stored.

[0026] The folding mechanism includes a folding frame 2, a sliding guide rail 3, a linkage assembly 4, and a locking element. The folding frame 2 consists of multiple hinged frame units connected by hinges. Lubrication sleeves are installed at the hinge points, with the inner wall of the sleeves coated with a low-friction coefficient lubricant and the outer wall fitted with a dust cover to prevent dust from entering the hinge areas. The sliding guide rail 3 is fixed to the inner walls of both sides of the support frame 1. Guide grooves are formed on the inner wall of the sliding guide rail 3. One end of the linkage assembly 4 is hinged to the outer side of the folding frame 2, and the other end is slidably connected to the guide groove of the sliding guide rail 3. A reinforcing rib is provided in the middle of the linkage assembly 4, with both ends welded to the inner wall of the linkage assembly 4. The reinforcing rib is made of high-strength aluminum alloy and its surface is anodized to improve corrosion resistance. The locking element is used to restrict the position of the folding frame 2, ensuring the stability of the sunshade device in the unfolded state.

[0027] The drive assembly includes a motor 11, a transmission gear 12, and a rack 13. The motor 11 is fixedly mounted on the bottom end of the support frame 1. The top end of the output shaft of the motor 11 is fixedly connected to the transmission gear 12, which is meshed with one side of the rack 13. The other end of the rack 13 is hinged to the middle of the connecting rod assembly 4. A control panel 14 is mounted on one side of the drive assembly. Operation buttons are distributed on the outer wall of the control panel 14. The operation buttons are connected to the input end of the motor 11 via circuitry. The control panel 14 integrates a microprocessor, which receives external signals and controls the start and stop of the motor 11.

[0028] The auxiliary support assembly includes a telescopic rod, a support foot, and an adjustment knob. One end of the telescopic rod is hinged to the bottom of the folded frame 2, and the other end is fixed to the support foot. The outer wall of the telescopic rod is provided with a threaded section. The adjustment knob is threadedly connected to the threaded section of the telescopic rod. By rotating the adjustment knob, the length of the telescopic rod can be adjusted, thereby adjusting the height of the support foot to adapt to different terrain conditions.

[0029] The outer surface of the sunshade fabric 15 is coated with an anti-UV coating with a thickness of 0.1mm to 0.2mm. The inner surface of the sunshade fabric 15 is provided with a heat insulation layer made of polyurethane foam with a thickness of 1mm to 2mm. The sunshade fabric 15 is fixed to the top of the folding frame 2 at one end. When the folding frame 2 is unfolded, it stretches and unfolds. When the folding frame 2 is folded, the sunshade fabric 15 automatically winds back onto the sunshade fabric roll 5 under the action of the torsion spring 6.

[0030] The device operates as follows: In the initial state, the sunshade is stored in the storage slot 8 of the support frame 1, and the automatic locking buckle 10 is kept closed by magnetic attraction. When the user needs to unfold the sunshade, they press the operation button on the control panel 14. The microprocessor receives the signal and starts the motor 11. The motor 11 drives the transmission gear 12 to rotate, and the transmission gear 12 drives the rack 13 to move through meshing. The rack 13 drives the connecting rod assembly 4 to slide along the guide groove of the sliding guide rail 3, while simultaneously pushing the folding frame 2 to unfold. During the unfolding process, the sliding of the connecting rod assembly 4 causes the folding frame 2 to gradually extend, eventually reaching a fully unfolded state. At this time, the locking element fixes the position of the folding frame 2, and the sunshade cloth 15 unfolds from the sunshade cloth roll 5 under the stretching action of the folding frame 2 and covers the wheelchair, providing sunshade function. The telescopic rod in the auxiliary support assembly has its length adjusted by adjusting the knob, allowing the support feet to contact the ground and enhancing the stability of the device in the unfolded state. When the user needs to store the sunshade device, they press the operation button on the control panel 14 again. The microprocessor receives the signal and starts the motor 11 in reverse. The motor 11 drives the transmission gear 12 to rotate in the opposite direction. The transmission gear 12 drives the rack 13 to move in the opposite direction through meshing. The rack 13 pulls the connecting rod assembly 4 to slide in the opposite direction along the guide groove of the sliding guide rail 3, while simultaneously pushing the folding frame 2 to fold. During the folding process, the sunshade cloth 15 automatically winds back into the sunshade cloth roll 5 under the action of the torsion spring 6. Finally, the sunshade device is completely stored in the storage slot 8 of the support frame 1, and the automatic lock 10 closes through magnetic adsorption, completing the storage process.

[0031] In the above embodiments, the connection, position, and cooperation relationships of each component are all achieved through mechanical structure and electrical control, ensuring the stability and reliability of the sunshade device during deployment and retraction. To better enable those skilled in the art to fully understand and implement this utility model, the specific implementation principles of this utility model are further explained below in conjunction with specific application scenarios.

[0032] In practical use, when a user moves an electric wheelchair from indoors to outdoors, the sunshade unfolds as follows: First, the user presses the operation button on the control panel 14. The microprocessor receives the signal and starts the motor 11. The output shaft of the motor 11 drives the transmission gear 12 to rotate, and the transmission gear 12 drives the rack 13 to move axially through one side of the rack. The other end of the rack 13 is hinged to the linkage group 4, thus converting the linear motion of the rack 13 into the sliding motion of the linkage group 4. One end of the linkage group 4 is slidably connected to the guide groove of the sliding guide rail 3, and the other end is hinged to the outside of the folding frame 2. As the linkage group 4 slides along the guide groove of the sliding guide rail 3, the folding frame 2 gradually unfolds. Since the folding frame 2 consists of multiple frame units connected by hinges, these frame units unfold sequentially under the push of the linkage group 4, forming a stable support structure. When the folding frame 2 is fully unfolded, the locking mechanism fixes the position of the frame units, ensuring the stability of the sunshade in the unfolded state. Meanwhile, the sunshade 15 unfolds from the sunshade roll 5 under the stretching action of the folding frame 2 and covers the wheelchair. The torsion springs 6 at both ends of the sunshade roll 5 are stretched during the unfolding of the sunshade 15, storing elastic potential energy to provide power for subsequent automatic rewinding.

[0033] After the sunshade device is deployed, the telescopic rod in the auxiliary support assembly can be adjusted in length using an adjustment knob, allowing the support feet to contact the ground and thus enhancing the stability of the device in the deployed state. Specifically, rotating the adjustment knob causes the threaded engagement between the threaded section and the knob to change the length of the telescopic rod, enabling the support feet to adapt to the height requirements of different terrain conditions. This design significantly improves the applicability of the sunshade device in complex terrain.

[0034] When the user needs to retract the sunshade device, pressing the operation button on the control panel 14 again activates the microprocessor, which then starts the motor 11 in reverse. The motor 11 drives the transmission gear 12 to rotate in the opposite direction, which in turn drives the rack 13 to move in the opposite direction. The rack 13 pulls the connecting rod assembly 4 to slide in the guide groove of the sliding guide rail 3, simultaneously pushing the folding frame 2 to fold. During folding, the sunshade fabric 15 is subjected to the rebound force of the torsion spring 6, automatically winding back onto the sunshade fabric roll 5. The limiting blocks 7 are fixed to both ends of the sunshade fabric roll 5 with bolts to prevent the sunshade fabric 15 from shifting during winding, thus ensuring that the sunshade fabric 15 is neatly wound onto the sunshade fabric roll 5. Finally, the folding frame 2 is completely folded and stored in the storage slot 8 of the support frame 1, and the automatic locking buckle 10 closes magnetically, completing the storage process. The buffer pad 9 is made of elastic material with anti-slip textures on the surface, effectively reducing the impact and vibration during sunshade device storage and protecting the integrity of the device.

[0035] In the above embodiments, the collaborative working principle of each component can be further explained as follows: The guide groove design of the sliding guide rail 3 provides a precise sliding path for the linkage assembly 4, ensuring the stability of the folding frame 2 during unfolding and folding. The reinforcing rib in the middle of the linkage assembly 4 not only enhances the structural strength of the linkage assembly 4, but also improves its corrosion resistance through high-strength aluminum alloy material and anodizing treatment, extending the service life of the device. The outer surface of the sunshade cloth 15 is coated with an anti-ultraviolet coating with a thickness of 0.1mm to 0.2mm, which can effectively block ultraviolet radiation; the inner surface is provided with a heat insulation layer, which is made of polyurethane foam with a thickness of 1mm to 2mm, which can significantly reduce heat transfer and improve user comfort. The hinge part of the folding frame 2 is provided with a lubrication sleeve, the inner wall is coated with a low-friction coefficient lubrication coating, and the outer wall is provided with a dust cover, which reduces the frictional resistance of the hinge part and prevents dust from entering, ensuring the long-term smooth operation of the folding frame 2.

[0036] In summary, this invention, through the organic combination of mechanical structure and electrical control, achieves rapid deployment and storage of the sunshade device, significantly improving its spatial adaptability and ease of use. The specific functions of each component and their interrelationships have been meticulously designed to ensure the reliability and efficiency of the device in practical applications.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sunshade device for an electric wheelchair that is easy to store, characterized in that, The system includes a support frame (1), a folding mechanism, and a drive assembly. The support frame (1) is fixedly installed at the rear of the wheelchair body. A folding mechanism is installed within the support frame (1), with one end connected to the drive assembly. The folding mechanism includes a folding skeleton (2), a sliding rail (3), a linkage group (4), and a locking element. The folding skeleton (2) is composed of multiple hinged skeleton units connected by hinges. The sliding rail (3) is fixed to the inner walls of both sides of the support frame (1), and the inner wall of the sliding rail (3) has guide grooves. One end of the linkage assembly (4) is hinged to the outside of the folding frame (2), and the other end is slidably connected to the guide groove of the sliding guide rail (3). The locking member is used to limit the position of the folding frame (2). The drive assembly includes a motor (11), a transmission gear (12) and a rack (13). The motor (11) is fixedly installed at the bottom of the support frame (1). The top of the output shaft of the motor (11) is fixedly connected to the transmission gear (12). The transmission gear (12) is meshed and installed on one side of the rack (13). The other end of the rack (13) is hinged to the middle of the linkage assembly (4).

2. The sunshade device for an electric wheelchair that is easy to store according to claim 1, characterized in that, The top of the support frame (1) is symmetrically fixed with a fixed seat, and a sunshade cloth roll (5) is hinged to the outside of the fixed seat. The outer wall of the sunshade cloth roll (5) is wrapped with sunshade cloth (15). One end of the sunshade cloth (15) is fixed to the top of the folding frame (2). Torsion springs (6) are provided at both ends of the sunshade cloth roll (5). One end of the torsion spring (6) is fixed to the outer wall of the fixed seat, and the other end is fixed to the outer wall of the sunshade cloth roll (5).

3. A sunshade device for an electric wheelchair that is easy to store according to claim 2, characterized in that, A limiting block (7) is provided on the outside of the sunshade cloth roll (5), and the limiting block (7) is used to prevent the sunshade cloth (15) from shifting during the winding process.

4. A sunshade device for an electric wheelchair that is easy to store according to claim 1, characterized in that, A storage groove (8) is provided on one side of the support frame (1). A buffer pad (9) is fixed to the inner wall of the storage groove (8). The buffer pad (9) is made of elastic material and has anti-slip texture on its surface. An automatic latch (10) is installed at the opening of the storage groove (8). One end of the automatic latch (10) is hinged to the inner wall of the storage groove (8), and the other end is connected to the outer wall of the support frame (1) by magnetic adsorption.

5. A sunshade device for an electric wheelchair that is easy to store according to claim 1, characterized in that, The bottom of the folding frame (2) is provided with an auxiliary support assembly, which includes a telescopic rod, a support foot and an adjustment knob. One end of the telescopic rod is hinged to the bottom of the folding frame (2) and the other end is fixed to the support foot. The outer wall of the telescopic rod is provided with a threaded section, and the adjustment knob is threadedly connected to the threaded section of the telescopic rod.

6. A sunshade device for an electric wheelchair that is easy to store according to claim 1, characterized in that, A control panel (14) is installed on one side of the drive assembly. Operation buttons are distributed on the outer wall of the control panel (14). The operation buttons are connected to the input end of the motor (11) through a circuit. A microprocessor is integrated inside the control panel (14). The microprocessor is used to receive external signals and control the start and stop of the motor (11).

7. A sunshade device for an electric wheelchair that is easy to store according to claim 1, characterized in that, The hinge portion of the folding frame (2) is provided with a lubrication sleeve, the inner wall of which is coated with a lubrication coating with a low coefficient of friction, and the outer wall of which is provided with a dust cover.

8. A sunshade device for an electric wheelchair that is easy to store according to claim 1, characterized in that, The connecting rod assembly (4) is provided with a reinforcing rib in the middle. The two ends of the reinforcing rib are respectively welded to the inner wall of the connecting rod assembly (4). The reinforcing rib is made of high-strength aluminum alloy and the surface of the reinforcing rib is anodized.

9. A sunshade device for an electric wheelchair that is easy to store according to claim 2, characterized in that, The outer surface of the sunshade cloth (15) is coated with an anti-ultraviolet coating, the thickness of which is 0.1 mm to 0.2 mm. The inner surface of the sunshade cloth (15) is provided with a heat insulation layer, the material of which is polyurethane foam, and the thickness of which is 1 mm to 2 mm.

10. A sunshade device for an electric wheelchair that is easy to store according to claim 1, characterized in that, The inner walls of the support frame (1) are symmetrically fixed with sliding guide rails (3), and the inner walls of the sliding guide rails (3) are provided with guide grooves.

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