Wheelchair convenient to fold

Abstract

The utility model discloses a wheelchair convenient to fold, which comprises a seat supporting frame, a front supporting frame is hinged on the front side of the seat supporting frame, front wheels are arranged at the bottoms of two fork feet of the front supporting frame, rear supporting rods are respectively hinged on two sides of the seat supporting frame, rear wheels are arranged at the end parts of the rear supporting rods, and a backrest supporting frame is hinged on the rear side of the seat supporting frame. A side supporting rod is connected between the backrest supporting frame and the rear supporting rod, a lower supporting rod is connected between the side supporting rod and the front supporting frame, a lock hole is formed in the upper end of the side supporting rod, and a lock pin assembly corresponding to the lock hole is installed on the backrest supporting frame. The connecting pin can be driven to slide in the guide groove by rotating the handle, so that the lock pin head is driven to be separated from the lock hole under the action of the pull rope, unlocking when the wheelchair is folded is realized, and compared with a traditional plate buckle type structure, the unlocking mechanism has the advantages of being more convenient and labor-saving to operate, free of hand clamping risk and good in attractiveness.

Description

Technical Field

[0001] The utility model belongs to the technical field of wheelchairs, and particularly relates to a wheelchair which is convenient to fold. Background Technique

[0002] A wheelchair is a chair equipped with wheels to help replace walking, and is an important mobile tool for the wounded, sick, and disabled for home rehabilitation, turnover transportation, medical treatment, and outdoor activities. The wheelchair not only meets the transportation needs of the physically disabled and those with limited mobility, but more importantly, it facilitates the movement and care of the sick by their families, enabling the sick to exercise their bodies and participate in social activities with the help of the wheelchair.

[0003] For easy carrying, wheelchairs are generally of a foldable structure. In the prior art, most of the latches used to control the folding of wheelchairs adopt a plate buckle structure, and there are some problems in the actual use process, such as:

[0004] 1. When folding the wheelchair, the operation is relatively laborious, and there is also a risk of pinching hands;

[0005] 2. The plate buckle structure is exposed, resulting in poor aesthetics. Content of the Utility Model

[0006] The purpose of the utility model is to provide a wheelchair which is convenient to fold, so as to solve the problems put forward in the above background technique. A wheelchair which is convenient to fold provided by the utility model has the characteristics of being convenient for quickly folding the wheelchair.

[0007] To achieve the above purpose, the utility model provides the following technical solution: A wheelchair which is convenient to fold includes a seat support frame, a seat cushion is connected above the seat support frame, a front support frame is hinged to the front side of the seat support frame, front wheels are installed at the bottoms of the two fork feet of the front support frame, a footrest is hinged to the crossbar of the front support frame, rear support rods are respectively hinged to both sides of the seat support frame, rear wheels are installed at the ends of the rear support rods, a backrest support frame is hinged to the rear side of the seat support frame, an armrest assembly is connected between both sides of the seat support frame and the backrest support frame, side support rods are connected between the backrest support frame and the rear support rods, the side support rods are respectively hinged to the backrest support frame and the rear support rods, a lower support rod is connected between the side support rod and the front support frame, the lower support rod is respectively hinged to the side support rod and the front support frame, a lock hole is provided at the upper end of the side support rod, and a lock pin assembly corresponding to the lock hole is installed on the backrest support frame.

[0008] In order to make it more convenient to unlock when folding the wheelchair, further, the lock pin assembly includes a connecting rod, two symmetrically arranged sliding grooves are provided at the middle position of the connecting rod, a connecting pin is arranged inside the sliding groove, a pin sleeve is connected to the end of the connecting rod, a lock pin head slides inside the pin sleeve, the lock pin head is connected to the connecting pin through a pull rope, a handle is arranged outside the connecting rod, the handle includes two shells, and a guide groove corresponding to the end of the connecting pin is arranged inside the shell.

[0009] To axially limit the handle and guide the rotation of the handle, further, two limit sleeves corresponding to the ends of the handle are connected to the connecting rod. The limit sleeve includes two identical ring sleeves. A limit protrusion is provided inside the ring sleeve, and a limit groove corresponding to the limit protrusion is provided on the connecting rod. A convex ring is provided at the end of the ring sleeve, and a clamping groove corresponding to the convex ring is provided on the housing.

[0010] To make the lock pin head protrude in the natural state and automatically reset after the lock pin head moves, further, a spring is sleeved on the lock pin head, and the spring is located inside the pin sleeve.

[0011] To press the lock pin head when opening the wheelchair and make the lock pin head automatically insert into the lock hole, further, an arc-shaped groove is provided on the inner side of the side support rod on one side of the lock hole.

[0012] To be used as an electric wheelchair, further, the rear wheels are drive wheels with motors, a storage battery is installed at the bottom of the seat support frame, a controller is installed between the two side support rods, and a controller is installed on one of the armrest assemblies.

[0013] To make the armrest handle can be rotated upward to open, making the use of the wheelchair more convenient, further, the armrest assembly includes an armrest support rod and an armrest handle. Among them, the lower end of the armrest support rod is hinged to the seat support frame, one end of the armrest handle is connected to the backrest support frame, and the armrest handle and the armrest support rod are connected by an armrest lock. The armrest lock includes a lock seat. Among them, the armrest support rod and the armrest handle are respectively hinged to the lock seat. A jack seat is connected to the bottom of the armrest handle. A slot corresponding to the jack seat is provided on the lock seat. A button is provided on one side of the lock seat, a lock head is provided on the other side of the lock seat, a connecting portion connected to the button is provided on the lock head, the connecting portion is slidably connected to the lock seat, a pin head corresponding to the jack seat is also provided on the lock head, and a return spring is sleeved on the button.

[0014] In the present invention, further, a method for realizing a conveniently foldable wheelchair includes the following steps:

[0015] (1). When the wheelchair needs to be folded, rotate the handle, and the handle drives the two connecting pins to move towards the middle position of the connecting rod, and under the action of the pulling rope, the two lock pin heads retract and separate from the lock hole;

[0016] (2). Push the backrest support frame forward to misalign the lock hole and the lock pin head, release the handle, and continue to rotate the backrest support frame to complete the folding of the wheelchair;

[0017] (3). When the wheelchair needs to be opened, open the backrest support frame in the opposite direction until the lock pin head inserts into the lock hole.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] 1. By rotating the handle of the present utility model, the connecting pin can be driven to slide in the guide groove, so that under the action of the pull rope, the lock pin head is separated from the lock hole, realizing the unlocking when the wheelchair is folded. Compared with the traditional buckle structure, it has the characteristics of more convenient and labor-saving operation, no risk of pinching hands and good aesthetics;

[0020] 2. A spring is sleeved on the lock pin head of the present utility model, so that the lock pin head is in an extended state in the natural state, and the lock pin head can automatically reset after acting;

[0021] 3. An arc-shaped groove is provided on the inner side surface of the side support rod of the present utility model on one side of the lock hole. When the wheelchair is opened, the lock pin head is pressed through the arc-shaped groove, so that the lock pin head automatically inserts into the lock hole;

[0022] 4. Pressing the button of the present utility model drives the lock buckle head to move, so that the pin head is separated from the jack socket, and the handle can be rotated upward to open, making the use of the wheelchair more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a structural schematic diagram of the present utility model;

[0024] Figure 2 and 3 are both axonometric structural schematic diagrams of the present utility model;

[0025] Figure 4 is an exploded structural schematic diagram of the lock pin assembly of the present utility model;

[0026] Figure 5 is a structural schematic diagram of the connecting rod of the present utility model;

[0027] Figure 6 is a structural schematic diagram of the housing of the present utility model;

[0028] Figure 7 is a structural schematic diagram of the limit sleeve of the present utility model;

[0029] Figure 8 is a partial cross-sectional structural schematic diagram of the lock pin assembly of the present utility model;

[0030] Figure 9 is a structural schematic diagram of the present utility model after removing one housing;

[0031] Figure 10 is a structural schematic diagram of the side support rod of the present utility model;

[0032] Figure 11 is an exploded structural schematic diagram of the armrest assembly of the present utility model;

[0033] Figure 12 This is a schematic structural diagram of the armrest lock of the present utility model;

[0034] Figure 13 This is an exploded schematic structural diagram of the connection between the controller and the armrest handle of the present utility model;

[0035] Figure 14 This is a schematic structural diagram of the present utility model after folding;

[0036] In the figure: 1, seat cushion; 2, seat support frame; 3, front support frame; 4, footrest; 5, front wheel; 6, storage battery; 7, lower support rod; 8, rear support rod; 9, rear wheel; 10, side support rod; 101, lock hole; 102, arc groove; 11, backrest support frame; 12, armrest assembly; 121, armrest support rod; 122, armrest lock; 1221, lock seat; 1222, button; 1223, return spring; 1224, slot; 1225, pin head; 1226, lock head; 1227, connecting part; 123, armrest handle; 1231, insertion groove; 1232, limit button; 1233, limit round block; 124, jack seat; 13, controller; 14, controller; 15, lock pin assembly; 151, lock pin head; 152, pin sleeve; 153, spring; 154, pull rope; 155, limit sleeve; 1551, ring sleeve; 1552, limit protrusion; 1553, convex ring; 156, connecting pin; 157, connecting rod; 1571, chute; 1572, limit groove; 158, handle; 1581, housing; 1582, guide groove; 1583, card slot; 16, adjusting seat; 161, limit round groove. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0038] Embodiment 1

[0039] Please refer to Figures 1-14, the present utility model provides the following technical solutions: A wheelchair that is convenient to fold, including a seat support frame 2, a seat cushion 1 is connected above the seat support frame 2, a front support frame 3 is hinged to the front side of the seat support frame 2, front wheels 5 are installed at the bottoms of the two fork feet of the front support frame 3, a footrest 4 is hinged to the crossbar of the front support frame 3, rear support rods 8 are respectively hinged to both sides of the seat support frame 2, rear wheels 9 are installed at the ends of the rear support rods 8, a backrest support frame 11 is hinged to the rear side of the seat support frame 2, an armrest assembly 12 is connected between both sides of the seat support frame 2 and the backrest support frame 11, a side support rod 10 is connected between the backrest support frame 11 and the rear support rod 8, the side support rod 10 is respectively hinged to the backrest support frame 11 and the rear support rod 8, a lower support rod 7 is connected between the side support rod 10 and the front support frame 3, the lower support rod 7 is respectively hinged to the side support rod 10 and the front support frame 3, a lock hole 101 is provided at the upper end of the side support rod 10, and a lock pin assembly 15 corresponding to the lock hole 101 is installed on the backrest support frame 11. In the present utility model, both the seat cushion 1 and the backrest support frame 11 adopt ergonomic designs, providing better comfort.

[0040] Specifically, the lock pin assembly 15 includes a connecting rod 157. Two symmetrically arranged sliding grooves 1571 are provided at the middle position of the connecting rod 157. A connecting pin 156 is provided inside the sliding groove 1571. The end of the connecting rod 157 is connected with a pin sleeve 152. A lock pin head 151 slides inside the pin sleeve 152. The lock pin head 151 is connected with the connecting pin 156 through a pull rope 154. A handle 158 is provided outside the connecting rod 157. The handle 158 includes two shells 1581. The two shells 1581 are connected by screws. A guiding groove 1582 corresponding to the end of the connecting pin 156 is provided inside the shell 1581. The pin sleeve 152 and the connecting rod 157 are connected by screws. The lock pin assembly 15 is installed by clamping the backrest support frame 11 through the cooperation of the pin sleeve 152 and the connecting rod 157.

[0041] By adopting the above technical solutions, the present utility model can drive the connecting pin 156 to slide in the guiding groove 1582 by rotating the handle 158, so as to drive the lock pin head 151 to separate from the lock hole 101 under the action of the pull rope 154, realizing the unlocking when the wheelchair is folded. Compared with the traditional buckle structure, it has the characteristics of more convenient and labor-saving operation, no risk of pinching hands and good aesthetics.

[0042] Specifically, two limit sleeves 155 corresponding to the ends of the handle 158 are connected to the connecting rod 157. The limit sleeve 155 includes two identical ring sleeves 1551. A limit protrusion 1552 is provided inside the ring sleeve 1551, and a limit groove 1572 corresponding to the limit protrusion 1552 is provided on the connecting rod 157. By inserting the limit protrusion 1552 into the limit groove 1572, the limit between the ring sleeve 1551 and the connecting rod 157 is realized. A convex ring 1553 is provided at the end of the ring sleeve 1551, and a clamping groove 1583 corresponding to the convex ring 1553 is provided on the housing 1581. The clamping groove 1583 is clamped outside the convex ring 1553.

[0043] By adopting the above technical solution, axial limitation of the handle 158 is performed, and guiding of the rotation of the handle 158 is performed.

[0044] Specifically, a spring 153 is sleeved on the lock pin head 151, and the spring 153 is located inside the pin sleeve 152.

[0045] By adopting the above technical solution, the lock pin head 151 is in an extended state in the natural state, and the lock pin head 151 can automatically reset after acting.

[0046] Specifically, an arc-shaped groove 102 is provided on the inner side of the side support rod 10 on one side of the lock hole 101.

[0047] By adopting the above technical solution, when the wheelchair is opened, the lock pin head 151 is pressed by the arc-shaped groove 102, so that the lock pin head 151 automatically inserts into the lock hole 101.

[0048] Embodiment 2

[0049] The difference between this embodiment and Embodiment 1 is that: Specifically, the rear wheel 9 is a driving wheel with a motor, a storage battery 6 is installed at the bottom of the seat support frame 2, a controller 14 is installed between the two side support rods 10, and a controller 13 is installed on one of the armrest assemblies 12.

[0050] By adopting the above technical solution, the wheelchair in this embodiment is an electric wheelchair.

[0051] Specifically, the controller 13 is connected to the handle 123 through the adjustment base 16. An insertion groove 1231 corresponding to the adjustment base 16 is provided on the handle 123. A number of limiting circular grooves 161 are provided on the adjustment base 16. A limiting button 1232 is also provided on the handle 123. The limiting button 1232 is slidably connected to the handle 123. A return spring is sleeved on the limiting button 1232. A limiting circular block 1233 corresponding to the limiting circular groove 161 is provided on the limiting button 1232. The limiting circular block 1233 is embedded in the limiting circular groove 161 to limit the adjustment base 16. When adjustment is needed, the limiting button 1232 is pushed upward to separate the limiting circular block 1233 from the limiting circular groove 161, and then the position of the adjustment base 16 is adjusted. After the adjustment is completed, the limiting button 1232 makes the limiting circular block 1233 embedded in the limiting circular groove 161 under the action of the return spring.

[0052] By adopting the above technical solution, it is convenient to adjust the position of the controller 13, so as to be suitable for people with different hand lengths to use.

[0053] Embodiment 3

[0054] The difference between this embodiment and Embodiment 1 is as follows: Specifically, the armrest assembly 12 includes an armrest support rod 121 and a handle 123. Among them, the lower end of the armrest support rod 121 is hinged to the seat support frame 2, one end of the handle 123 is connected to the backrest support frame 11, and the handle 123 is connected to the armrest support rod 121 through an armrest lock 122.

[0055] Specifically, the armrest lock 122 includes a lock base 1221. Among them, the armrest support rod 121 and the handle 123 are respectively hinged to the lock base 1221. A socket base 124 is connected to the bottom of the handle 123. A slot 1224 corresponding to the socket base 124 is provided on the lock base 1221. A button 1222 is provided on one side of the lock base 1221. A lock head 1226 is provided on the other side of the lock base 1221. A connecting portion 1227 connected to the button 1222 is provided on the lock head 1226. The connecting portion 1227 is slidably connected to the lock base 1221. A pin head 1225 corresponding to the socket base 124 is also provided on the lock head 1226. An inclined surface is provided on the upper side of the end of the pin head 1225. A return spring 1223 is sleeved on the button 1222.

[0056] By adopting the above technical solution, pressing the button 1222 drives the lock head 1226 to move, so that the pin head 1225 is separated from the socket base 124, and the handle 123 can be rotated upward to open, making the use of the wheelchair more convenient.

[0057] Embodiment 4

[0058] Furthermore, a method for realizing a wheelchair that is convenient to fold according to the present invention includes the following steps:

[0059] When the wheelchair needs to be folded, turn the handle 158. The handle 158 drives the two connecting pins 156 to move towards the middle position of the connecting rod 157. Under the action of the pulling rope 154, the two locking pin heads 151 retract and separate from the locking holes 101.

[0060] Push the backrest support frame 11 forward to misalign the locking hole 101 with the locking pin head 151. Release the handle 158 and continue to turn the backrest support frame 11 to complete the folding of the wheelchair.

[0061] When the wheelchair needs to be opened, open the backrest support frame 11 in the reverse direction until the locking pin head 151 is inserted into the locking hole 101.

[0062] In summary, by turning the handle 158 of the present utility model, the connecting pin 156 can be driven to slide in the guide groove 1582, so that under the action of the pulling rope 154, the locking pin head 151 is driven to separate from the locking hole 101, realizing the unlocking during the folding of the wheelchair. Compared with the traditional buckle structure, it has the characteristics of more convenient and labor-saving operation, no risk of pinching hands and good aesthetics; a spring 153 is sleeved on the locking pin head 151 of the present utility model, so that the locking pin head 151 is in the extended state in the natural state, and the locking pin head 151 can automatically reset after acting; on the inner side of the side support rod 10 of the present utility model, an arc-shaped groove 102 is provided on one side of the locking hole 101. When the wheelchair is opened, the locking pin head 151 is pressed by the arc-shaped groove 102, so that the locking pin head 151 is automatically inserted into the locking hole 101; by pressing the button 1222 of the present utility model, the locking buckle head 1226 is driven to move, so that the pin head 1225 is separated from the jack socket 124, and the handle 123 can be turned upward to be opened, making the use of the wheelchair more convenient.

[0063] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A conveniently foldable wheelchair, characterized in that: The invention comprises a seat support frame, a seat cushion is connected to the top of the seat support frame, a front support frame is hinged on the front side of the seat support frame, a front wheel is installed at the bottom of two fork legs of the front support frame, a foot pedal is hinged on the cross piece of the front support frame, rear support rods are hinged on both sides of the seat support frame, rear wheels are installed on the ends of the rear support rods, a backrest support frame is hinged on the rear side of the seat support frame, armrest assemblies are connected between the two sides of the seat support frame and the back support frame, side support rods are connected between the back support frame and the rear support rods, the side support rods are respectively hinged to the back support frame and the rear support rods, a lower support rod is connected between the side support rods and the front support frame, the lower support rods are respectively hinged to the side support rods and the front support frame, a locking hole is provided at the upper end of the side support rod, and a locking pin assembly corresponding to the locking hole is installed on the back support frame.

2. The conveniently foldable wheelchair according to claim 1, characterized in that: The locking pin assembly includes a connecting rod, two symmetrical sliding grooves are provided in the middle position of the connecting rod, a connecting pin is provided inside the sliding groove, the end of the connecting rod is connected to a pin sleeve, a locking pin head is slid inside the pin sleeve, the locking pin head and the connecting pin are connected by a pull rope, a handle is provided on the outside of the connecting rod, the handle includes two shells, and guide grooves corresponding to the ends of the connecting pin are provided inside the shells.

3. A conveniently foldable wheelchair according to claim 2, characterized in that: The connecting rod is connected to two limiting sleeves corresponding to the ends of the handles. The limiting sleeves include two ring sleeves with the same structure. The inside of the ring sleeves is provided with limiting protrusions, and the connecting rod is provided with limiting grooves corresponding to the limiting protrusions.

4. The conveniently foldable wheelchair according to claim 3, characterized in that: The end of the ring sleeve is provided with a convex ring, and the shell body is provided with a clamping groove corresponding to the convex ring.

5. The conveniently foldable wheelchair according to claim 2, characterized in that: The lock pin head is sleeved with a spring, which is located inside the pin sleeve.

6. The conveniently foldable wheelchair according to claim 1, characterized in that: An arc groove is arranged on the inner side surface of the side support rod at one side of the lock hole.

7. The conveniently foldable wheelchair according to claim 1, characterized in that: The rear wheel is a driving wheel with a motor, a battery is installed at the bottom of the seat support frame, a controller is installed between the two side support rods, and a manipulator is installed on one of the armrest components.

8. The conveniently foldable wheelchair according to claim 1, characterized in that: The armrest assembly comprises an armrest support rod and an armrest handle, wherein the lower end of the armrest support rod is hinged to the seat support frame, one end of the armrest handle is hinged to the backrest support frame, and the armrest handle and the armrest support rod are connected via an armrest lock.

9. The conveniently foldable wheelchair according to claim 8, characterized in that: The armrest lock includes a lock seat, wherein the armrest support rod and the handrail handle are respectively hinged to the lock seat, the bottom of the handrail handle is connected to a jack seat, the lock seat is provided with a slot corresponding to the jack seat, a button is provided on one side of the lock seat, and a lock head is provided on the other side of the lock seat, the lock head is provided with a connecting part connected to the button, the connecting part is slidably connected to the lock seat, the lock head is also provided with a pin head corresponding to the jack seat, and a reset spring is provided on the button.

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