A stroller that is easy to fold

Abstract

The utility model relates to medical four -wheeled cart technical field discloses a four -wheeled cart convenient to fold, including wheelchair, the wheelchair includes the frame, be provided with folding mechanism on the frame, the folding mechanism top is provided with the cushion, the fixed mounting seat of folding mechanism is on, installation subassembly is located on the mounting seat, including mounting piece, the mounting piece includes the pressing plate, the pressing plate bottom is fixed with the lifting block.

Description

Technical Field

[0001] This utility model relates to the field of medical four-wheeled vehicle technology, and in particular to a four-wheeled vehicle that is easy to fold. Background Technology

[0002] As an important means of transportation for people with mobility impairments, the hygiene of wheelchairs directly affects the health and comfort of users. Since users need to be in contact with the seat for a long time, sweat and stains are easily generated. Therefore, the seat needs to be frequently disassembled and cleaned to ensure a hygienic environment. Most wheelchair seat cushions on the market are fixed to the mounting base with multiple bolts. The disassembly and assembly process requires tools such as screwdrivers, and the operation steps are cumbersome. This is especially time-consuming and laborious for users with limited mobility or caregivers, making it difficult to clean the seat cushion in a timely manner. Utility Model Content

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0004] In view of the problems existing in the above and / or existing folding four-wheeled vehicles, this utility model is proposed.

[0005] Therefore, the problem that this utility model aims to solve is the inconvenience of disassembly and assembly caused by the existing wheelchair seat cushions being fixed by multiple sets of bolts.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a four-wheeled vehicle that is easy to fold, comprising a wheelchair, the wheelchair comprising a frame, a folding mechanism provided on the frame, a seat cushion provided above the folding mechanism, and a mounting base fixed on the folding mechanism; The mounting assembly, located on the mounting base, includes a mounting component. The mounting component includes a pressure plate, and a lifting block is fixed to the bottom of the pressure plate. A push plate is slidably disposed inside the mounting base, and an inclined block is fixed on the push plate. A sliding groove is provided on the lifting block, and the push plate and the inclined block can slide in the sliding groove. A first spring is fixed to the bottom of the lifting block, and the first spring is fixed to the inner wall of the mounting base.

[0007] As a preferred embodiment of the foldable four-wheeled vehicle described in this utility model, a fixing sleeve is fixed on the inner wall of the mounting base, and the lifting block slides therein. There are multiple lifting blocks, and the number of fixing sleeves corresponds to the number of lifting blocks.

[0008] As a preferred embodiment of the foldable four-wheeled vehicle described in this utility model, the mounting assembly further includes a locking component located at one end of the mounting base. The locking component includes a fixing block fixed to one end of the mounting base, a push block fixed to one side of the push plate, a locking block slidably disposed inside the fixing block, a second spring fixed to one end of the locking block, the other end of the second spring fixed to the fixing block, and a locking groove provided on the push block.

[0009] As a preferred embodiment of the foldable four-wheeled vehicle described in this utility model, a rubber pad is fixed on one side of the push block.

[0010] As a preferred embodiment of the foldable four-wheeled vehicle described in this utility model, one end of the locking block is inclined, and the other end of the locking block is fixed with a pull rod.

[0011] As a preferred embodiment of the foldable four-wheeled vehicle described in this utility model, the mounting assembly further includes an auxiliary component located within the mounting base. The auxiliary component includes an extension plate fixed to the push plate, a rotating sleeve provided on one side of the extension plate, a movable column slidably disposed within the rotating sleeve, a first support block connected to the rotating sleeve by a bearing, the first support block being fixed to the inner wall of the mounting base, and a rotating plate fixed on the rotating sleeve.

[0012] As a preferred embodiment of the foldable four-wheeled vehicle of this utility model, the rotating sleeve is provided with a protrusion, and a torsion spring is provided on the outer sleeve of the rotating sleeve. The two ends of the torsion spring are respectively fixed to the protrusion and the first support block.

[0013] As a preferred embodiment of the foldable four-wheeled vehicle described in this utility model, the rotating sleeve is provided with a spiral groove, and a slider is fixed on the moving column, the slider sliding within the spiral groove.

[0014] As a preferred embodiment of the foldable four-wheeled vehicle described in this utility model, the movable column is provided with a rectangular groove, in which a rectangular block is inserted, and the rectangular block is fixed in the mounting base.

[0015] As a preferred embodiment of the foldable four-wheeled vehicle described in this utility model, the mounting base has a plurality of second support blocks fixed therein, and the push plate slides therein.

[0016] The beneficial effects of this utility model are as follows: by pressing the pressure plate and the mounting base together, the seat cushion is fixed by friction. When disassembling and assembling, you only need to operate the pressure plate directly to quickly take off and put on the seat cushion without the need for tools. Under normal conditions, the pressing and fitting between the pressure plate and the mounting base can stably fix the seat cushion. When the user sits on the seat cushion, it will trigger the pressure plate to move further towards the mounting base, which will significantly increase the pressure between the pressure plate and the seat cushion, and between the seat cushion and the mounting base, so as to achieve dynamic tight locking of the seat cushion and improve the reliability of the fixation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a structural diagram of a four-wheeled vehicle designed for easy folding.

[0018] Figure 2 To facilitate the folding of four-wheeled vehicles Figure 1 Enlarged view of the structure at point A in the middle.

[0019] Figure 3 A diagram showing the structure of a seat for easy folding of a four-wheeled vehicle.

[0020] Figure 4 To facilitate the folding of four-wheeled vehicles Figure 3 Enlarged view of the structure at point B in the middle.

[0021] Figure 5 To facilitate the folding of four-wheeled vehicles Figure 3 Enlarged view of the structure at point C.

[0022] Figure 6 A cross-sectional view of the lifting block for easy folding of a four-wheeled vehicle.

[0023] Figure 7 A structural diagram of the mounting base for easy folding of a four-wheeled vehicle.

[0024] Figure 8 Cross-sectional structural diagram of the mounting base for easy folding of four-wheeled vehicles.

[0025] Figure 9 To facilitate the folding of four-wheeled vehicles Figure 8 Enlarged view of the structure at point D.

[0026] Figure 10 A cross-sectional view of the rotating sleeve for easy folding of a four-wheeled vehicle. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0030] Example 1 Reference Figures 1-6 This is the first embodiment of the present invention, which provides a foldable four-wheeled vehicle. The foldable four-wheeled vehicle includes a wheelchair 1, which includes a frame 11. There are two frames 11, symmetrically distributed. A folding mechanism 12 is provided on the frame 11, and a seat cushion 13 is provided above the folding mechanism 12. A mounting seat 14 is fixed on the folding mechanism 12. The folding mechanism 12 is a cross-link telescopic mechanism, which consists of four links, two of which are rotatably connected. The upper end of the link is provided with the mounting seat 14, and the lower end of the link is rotatably connected to the frame 11. The frame 11 is provided with a limit to the minimum height of the mounting seat 14. The limiting block is engaged with the mounting base 14. When the limiting block is engaged with the mounting base 14, the mounting base 14 will not continue to descend. At this time, the wheelchair 1 is fully unfolded. When the wheelchair 1 needs to be folded, the middle of the seat cushion 13 is lifted upward. Under the action of the cross linkage telescopic mechanism, the included angle of the mutually rotating connecting rods changes, so that the distance between the two frames 11 becomes smaller, thereby completing the folding of the two frames 11. The material of the backrest of the wheelchair 1 can be folded, and the footrest of the wheelchair 1 can also be folded, thereby reducing the footprint of the wheelchair 1. This is the prior art, and this solution will not be described in detail. Moreover, those skilled in the art can clearly understand the working principle.

[0031] Mounting component 2, located on mounting base 14, includes mounting piece 21. Mounting piece 21 is designed for quick connection between seat cushion 13 and mounting base 14, improving installation and removal efficiency. There are two mounting bases 14, and the number of mounting components 2 is the same and corresponds to the number of mounting bases 14.

[0032] Mounting component 21 includes a pressure plate 211, with a lifting block 212 fixed to the bottom of the pressure plate 211. The mounting base 14 is hollow inside and has a through groove corresponding to the lifting block 212. A push plate 213 is slidably disposed inside the mounting base 14, with one end extending through to the outside of the mounting base 14 and the other end having a certain distance from the inner wall of the mounting base 14. An inclined block 214 is fixed to the push plate 213. A sliding groove 212-1 is formed on the lifting block 212, allowing the push plate 213 and the inclined block 214 to slide within the sliding groove 212-1. The bottom of the lifting block 212... A first spring 215 is fixed to the inner wall of the mounting base 14. The first spring 215 can apply a continuous pushing force to the lifting block 212 to ensure that the pressure plate 211 will not stick to the mounting base 14 under the action of gravity. In the absence of other external forces, there is a certain space between the mounting base 14 and the pressure plate 211, which can be used to put the cushion 13 into the gap. Several friction blocks are provided at the bottom of the pressure plate 211 to increase the friction between it and the cushion 13. The surface of the top of the mounting base 14 is also relatively rough, which makes the friction between it and the cushion 13 greater.

[0033] In the initial state, the lifting block 212 is at its highest position, and there is a gap between the mounting base 14 and the pressure plate 211. At this time, the push plate 213 slides in the slide groove 212-1, while only a very small part of the inclined block 214 is in contact with the slide groove 212-1. The inclined surface of the inclined block 214 contacts the slide groove 212-1. Then, the seat cushion 13 is placed in the gap between the mounting base 14 and the pressure plate 211. Then, the push plate 213 is pushed further into the mounting base 14. At this time, the inclined block 214 will follow the push plate 213, thereby applying a pushing force to the bottom of the slide groove 212-1, thereby driving the lifting block 212 to move downward, and then driving the pressure plate 211 to move downward, so that the seat cushion 13 and the mounting base 14 fit tightly together. Under the action of friction, the relative positions of the two are locked, and the initial fixation of the seat cushion 13 is completed.

[0034] Example 2 Reference Figures 3-5 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0035] Specifically, a fixing sleeve 216 is fixed on the inner wall of the mounting base 14, and a lifting block 212 slides in it. There are multiple lifting blocks 212, and the number of fixing sleeves 216 corresponds to the number of lifting blocks 212. The shape of the through groove inside the fixing sleeve 216 corresponds to the lifting block 212, ensuring that the lifting block 212 can move up and down stably. The setting of multiple sets of lifting blocks 212 ensures that the pressure plate 211 can apply relatively uniform pressure to the seat cushion 13.

[0036] Specifically, the mounting component 2 also includes a locking element 22 located at one end of the mounting base 14. The locking element 22 is used to lock the position of the push plate 213, thereby locking the position of the pressure plate 211 and ensuring that the seat cushion 13 can fit tightly against the mounting base 14.

[0037] The locking component 22 includes a fixing block 221 fixed to one end of the mounting base 14, a push block 222 fixed to one side of the push plate 213, a locking block 223 slidably disposed in the fixing block 221, a second spring 224 fixed to one end of the locking block 223, and the other end of the second spring 224 fixed to the fixing block 221. A locking groove 222-1 is provided on the push block 222. The second spring 224 applies a continuous pushing force to the locking block 223. When the locking block 223 and the locking groove 222-1 are coaxial, the two will engage, thereby restricting the position of the push block 222 relative to the mounting base 14 and preventing the push block 222 from moving.

[0038] Specifically, a rubber pad 225 is fixed on one side of the push block 222. When the locking groove 222-1 and the locking block 223 are initially engaged, one end of the rubber pad 225 is in contact with the pressure plate 211. However, the rubber pad 225 is not compressed at this time. The size of the locking groove 222-1 is slightly larger than that of the locking block 223, so that after the locking groove 222-1 and the locking block 223 are initially engaged, the push plate 213 can move a distance further into the mounting base 14 to provide space for a tighter engagement.

[0039] Specifically, one end of the locking block 223 is inclined, and the other end of the locking block 223 is fixed with a pull rod 226. Due to the inclined setting, when the push block 222 is pushed to drive the push plate 213 to move into the mounting base 14, the end face of the push block 222 will first contact the inclined surface of the locking block 223, thereby applying a downward pushing force to the locking block 223. The locking block 223 will not affect the movement of the push block 222. After the locking groove 222-1 and the locking block 223 are coaxially engaged, their vertical end faces will fit together, thereby preventing the push block 222 from moving in the opposite direction, thus locking the position of the push plate 213.

[0040] Pull rod 226 is used to release the locking groove 222-1 from the locking block 223. When it is necessary to remove the seat cushion 13, pull pull rod 226 to move the locking block 223 downward and separate it from the locking groove 222-1. Under the action of the first spring 215, the lifting block 212 moves upward and resets. The slide groove 212-1 will apply a pushing force to the inclined surface of the inclined block 214, thereby driving the push plate 213 to move in the opposite direction and finally reset. The pressure plate 211 moves upward and away from the seat cushion 13, after which the seat cushion 13 can be removed.

[0041] Example 3 Reference Figures 7-10 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0042] Specifically, the mounting component 2 also includes an auxiliary component 23 located within the mounting base 14. The auxiliary component 23 is configured to trigger a tighter connection between the seat cushion 13 and the mounting base 14 when the seat cushion 13 is subjected to a downward force, thereby enhancing the reliability of the connection.

[0043] The seat cushion 13 is mainly made of polyester fiber fabric. When the user sits on the seat cushion 13, the seat cushion 13 will be subjected to downward pressure and will bend downward to form a certain arc.

[0044] The auxiliary component 23 includes an extension plate 231 fixed to the push plate 213. A rotating sleeve 232 is provided on one side of the extension plate 231. A moving column 233 is slidably provided inside the rotating sleeve 232. A first support block 234 is connected to the rotating sleeve 232 by a bearing. The first support block 234 is fixed to the inner wall of the mounting base 14. A rotating plate 235 is fixed on the rotating sleeve 232. A rotating groove 14-1 corresponding to the rotating plate 235 is opened on the mounting base 14. When the user sits on the cushion 13, the cushion 13 bends downward, which will drive the rotating plate 235 to rotate downward, thereby driving the rotating sleeve 232 to rotate. This causes the moving column 233 to move towards the extension plate 231 and push the extension plate 231 to move a certain distance. The extension plate 231 will drive the push plate 213 to move further into the mounting base 14, thereby driving the lifting block 212 to move further downward. Finally, the pressure plate 211 applies more pressure to the cushion 13, thereby making the cushion 13 and the mounting base 14 fit more tightly.

[0045] Specifically, the rotating sleeve 232 is provided with a protrusion 232-1, and a torsion spring 236 is provided on the outer sleeve of the rotating sleeve 232. The two ends of the torsion spring 236 are fixed to the protrusion 232-1 and the first support block 234 respectively. The torsion spring 236 is used to maintain the initial position of the rotating sleeve 232 and reset the rotating sleeve 232.

[0046] Specifically, a spiral groove 232-2 is provided on the rotating sleeve 232, and a slider 237 is fixed on the moving column 233. The slider 237 slides in the spiral groove 232-2. Through the cooperation of the slider 237 and the spiral groove 232-2, when the rotating sleeve 232 rotates, the slider 237 slides along the spiral groove 232-2, causing the moving column 233 to move along the axial direction of the rotating sleeve 232 towards the extension plate 231. At this time, the torsion spring 236 is compressed.

[0047] In the initial state, before the pressure plate 211 moves downward, the extension plate 231 is in contact with one side of the rotating sleeve 232, and one end face of the moving column 233 is coplanar with the end face of the extension plate 231. When the push plate 213 is pushed to move in order to install the seat cushion 13, the extension plate 231 moves accordingly and has a certain distance between it and the end face of the rotating sleeve 232. Then, during the rotation of the rotating sleeve 232, the pitch of the spiral groove 232-2 is large, and even with a small rotation angle, it can drive the moving column 233 to move. The moving column 233 first approaches the extension plate 231, and then continues to move, pushing the extension plate 231 to move.

[0048] Specifically, a rectangular groove 233-1 is provided on the movable column 233, in which a rectangular block 238 is inserted. The rectangular block 238 is fixed in the mounting base 14. The rectangular block 238 and the rectangular groove 233-1 cooperate to ensure that the movable column 233 cannot rotate. A connecting rod is fixed to the end of the rectangular block 238, and the connecting rod is fixed to the inside of the mounting base 14.

[0049] Specifically, multiple second support blocks 217 are fixed inside the mounting base 14, and the push plate 213 slides within them. The setting of the second support blocks 217 enables the push plate 213 to move smoothly within the mounting base 14, ensuring that its position does not shift.

[0050] When using the wheelchair, the old seat cushion 13 needs to be in the unfolded state before disassembling or assembling it. First, remove the old seat cushion 13, pull the lever 226, and move the locking block 223 downward to separate it from the locking groove 222-1. Under the action of the first spring 215, the lifting block 212 moves upward to reset, and the slide groove 212-1 will apply a pushing force to the inclined surface of the inclined block 214, thereby driving the push plate 213 to move in the opposite direction and finally reset. The pressure plate 211 moves upward and away from the seat cushion 13, and then the seat cushion 13 can be removed. The pressure plate 211 on the other side of the seat cushion 13 can be removed in the same way.

[0051] Place the new seat cushion 13 in the gap between the mounting base 14 and the pressure plate 211, then push the push plate 213 further into the mounting base 14. At this time, the inclined block 214 will follow the push plate 213, thereby applying a pushing force to the bottom of the slide groove 212-1, thereby driving the lifting block 212 to move downward, and then driving the pressure plate 211 to move downward, so that the seat cushion 13 and the mounting base 14 fit tightly together. Under the action of friction, the relative positions of the two are locked, completing the initial fixation of the seat cushion 13. At the same time, as the push block 222 moves, when the push plate 213 moves further into the mounting base 14, the end face of the push block 222 will first contact the inclined surface of the locking block 223. The locking block 223 will not affect the movement of the push block 222. When the locking block 223 is coaxial with the locking groove 222-1, the two will engage, thereby restricting the position of the push block 222 relative to the mounting base 14 and preventing the push block 222 from moving. Repeat the operation on the other side of the seat cushion 13, thereby completing the initial fixation of the seat cushion 13.

[0052] When the user sits on the seat cushion 13, the seat cushion 13 bends downward, causing the rotating plate 235 to rotate downward, which in turn causes the rotating sleeve 232 to rotate. Through the cooperation of the slider 237 and the spiral groove 232-2, the moving column 233 moves towards the extension plate 231 and pushes the extension plate 231 to move a certain distance. The extension plate 231 will drive the push plate 213 to move further into the mounting base 14, thereby driving the lifting block 212 to move further downward. Finally, the pressure plate 211 applies more pressure to the seat cushion 13, so that the seat cushion 13 and the mounting base 14 fit more tightly, ensuring the reliability of the seat cushion 13 installation.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A four-wheeled vehicle that is easy to fold, characterized in that: include, Wheelchair (1), the wheelchair (1) includes a frame (11), a folding mechanism (12) is provided on the frame (11), a seat cushion (13) is provided above the folding mechanism (12), and a mounting base (14) is fixed on the folding mechanism (12). The mounting component (2), located on the mounting base (14), includes a mounting piece (21). The mounting piece (21) includes a pressure plate (211). A lifting block (212) is fixed at the bottom of the pressure plate (211). A push plate (213) is slidably arranged inside the mounting base (14). An inclined block (214) is fixed on the push plate (213). A sliding groove (212-1) is provided on the lifting block (212). The push plate (213) and the inclined block (214) can slide in the sliding groove (212-1). A first spring (215) is fixed at the bottom of the lifting block (212). The first spring (215) is fixed on the inner wall of the mounting base (14).

2. The foldable four-wheeled vehicle as described in claim 1, characterized in that: A fixing sleeve (216) is fixed on the inner wall of the mounting base (14), and the lifting block (212) slides therein. There are multiple lifting blocks (212), and the number of fixing sleeves (216) corresponds to the number of lifting blocks (212).

3. The foldable four-wheeled vehicle as described in claim 1 or 2, characterized in that: The mounting assembly (2) also includes a locking member (22) located at one end of the mounting base (14). The locking member (22) includes a fixing block (221) fixed to one end of the mounting base (14), a push block (222) fixed on one side of the push plate (213), a locking block (223) slidably disposed in the fixing block (221), a second spring (224) fixed at one end of the locking block (223), the other end of the second spring (224) fixed on the fixing block (221), and a locking groove (222-1) opened on the push block (222).

4. The foldable four-wheeled vehicle as described in claim 3, characterized in that: A rubber pad (225) is fixed on one side of the push block (222).

5. The foldable four-wheeled vehicle as described in claim 4, characterized in that: One end of the locking block (223) is inclined, and the other end of the locking block (223) is fixed with a pull rod (226).

6. The foldable four-wheeled vehicle as described in claim 4 or 5, characterized in that: The mounting assembly (2) also includes an auxiliary component (23) located in the mounting base (14). The auxiliary component (23) includes an extension plate (231) fixed on the push plate (213). A rotating sleeve (232) is provided on one side of the extension plate (231). A movable column (233) is slidably provided in the rotating sleeve (232). A first support block (234) is connected to the rotating sleeve (232) by a bearing. The first support block (234) is fixed on the inner wall of the mounting base (14). A rotating plate (235) is fixed on the rotating sleeve (232).

7. The foldable four-wheeled vehicle as described in claim 6, characterized in that: The rotating sleeve (232) is provided with a protrusion (232-1), and a torsion spring (236) is provided on the outer sleeve of the rotating sleeve (232). The two ends of the torsion spring (236) are fixed to the protrusion (232-1) and the first support block (234) respectively.

8. The foldable four-wheeled vehicle as described in claim 7, characterized in that: The rotating sleeve (232) has a spiral groove (232-2), and the movable column (233) has a slider (237) fixed on it. The slider (237) slides in the spiral groove (232-2).

9. The foldable four-wheeled vehicle as described in claim 7 or 8, characterized in that: The movable column (233) has a rectangular groove (233-1) in which a rectangular block (238) is inserted, and the rectangular block (238) is fixed in the mounting base (14).

10. The foldable four-wheeled vehicle as described in claim 9, characterized in that: The mounting base (14) has a plurality of second support blocks (217) fixed inside, and the push plate (213) slides therein.

Images