Chair seat with constant armrest angle and tool for riding instead of walk

Abstract

The utility model discloses a seat with constant armrest angle and a tool for riding instead of walk, which comprises a seat, a backrest, an armrest and a linkage mechanism, the backrest is pivoted on the seat through a first pivot shaft, and the armrest is pivoted on the backrest through a second pivot shaft; the linkage mechanism comprises a connecting rod and a limiting piece, one end of the connecting rod is pivoted with the chair seat through a third pivoting shaft, a sliding groove is formed in the other end of the connecting rod, one end of the limiting piece is arranged in the sliding groove in a sliding mode through a shaft pin, and the other end of the limiting piece is pivoted to the backrest through the second pivoting shaft; the backrest is provided with an abutting part, the connecting rod is provided with an abutting surface, when the armrest is in the use position, the shaft pin is located at the upper end of the sliding groove, and the abutting part abuts against the abutting surface. According to the utility model, the included angle between the armrest and the chair seat can be kept constant, so that the use convenience is improved; the service life is guaranteed, and the stability of the seat is improved.

Description

Technical Field

[0001] The utility model relates to a means of transport, in particular to a chair seat with armrests having constant angles. Background Art

[0002] Scooters and wheelchairs are means of transportation for people with limited mobility, and are mostly used by some specific patients and the elderly. Due to the differences in the user groups, many parts of the means of transportation are adjustable. However, since the armrests of some existing means of transportation are set on the backrest, when the angle of the backrest is adjusted, the position of the armrests will also change with the adjustment of the angle of the backrest. Therefore, the angle between the armrests and the seat will also change, forcing the user to adjust the hand posture when adjusting the backrest angle, or have to adjust the angle of the armrests again, which makes the operation inconvenient and reduces the user's comfort.

[0003] Therefore, it is necessary to design a kind of walking-replacing tool seat to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of the utility model is to provide a chair seat with an armrest with a constant angle, which can keep the angle between the armrest and the seat constant when the backrest rotates relative to the seat, thereby improving the convenience of use and ensuring the comfort of sitting on the seat; and can transfer the impact of the armrest to the backrest to ensure the stability of the seat.

[0005] Another object of the utility model is to provide a folding bracket for a means of transport that is convenient and comfortable to use.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a chair seat with a constant armrest angle, which includes a chair seat, a backrest, an armrest and a linkage mechanism, the backrest is pivoted to the chair seat through a first pivot axis, and the armrest is pivoted to the backrest through a second pivot axis; the linkage mechanism includes a connecting rod and a limiting member, one end of the connecting rod is pivoted to the chair seat through a third pivot axis, and the other end is provided with a slide groove, one end of the limiting member is slidably arranged in the slide groove through an axle pin, and the other end of the limiting member is pivoted to the backrest through the second pivot axis; the backrest is provided with an abutment top, and the connecting rod is provided with an abutment top surface, when the armrest is in a use position, the axle pin is located at the upper end of the slide groove, and the abutment top and the abutment top surface abut against each other; a parallelogram structure is formed between the first pivot axis, the second pivot axis, the third pivot axis and the axle pin, so that the angle between the armrest and the load-bearing surface of the seat remains constant when the armrest is in the use position.

[0007] Compared with the prior art, the utility model provides a backrest and an armrest, and arranges the armrest on the backrest, so as to provide a position for the user's hands to be placed, thereby improving the comfort of use. In addition, a linkage mechanism is arranged between the seat, the backrest and the armrest, so that a parallelogram is formed between the seat, the backrest, the connecting rod and the limiter, so that when the backrest is rotated and adjusted relative to the seat, the armrest can be driven to rotate relative to the backrest through the action of the parallelogram, and the angle relative to the load-bearing surface of the seat remains unchanged. Therefore, when the armrest is in the use position, no matter what angle the backrest is adjusted to, the angle between the armrest and the load-bearing surface of the seat can be kept constant, which effectively improves the convenience of use, and keeps the armrest in the optimal position to ensure the comfort of riding. Furthermore, by providing an abutting top portion on the backrest and an abutting top surface on the connecting rod, when the armrest is in the use position, the abutting top portion and the abutting top surface abut against each other. Therefore, when the armrest is in the use position, the force applied to the armrest can be abutted against the abutting top portion of the backrest through the connecting rod, thereby avoiding concentration of force on the connecting rod, reducing the strength requirement of the connecting rod, thereby ensuring the service life of the connecting rod and improving the stability of the seat.

[0008] Preferably, a mounting seat is provided on the seat, the backrest is pivotally connected to the mounting seat, the seat is provided with a pivoting portion, and the connecting rod is pivotally connected to the pivoting portion.

[0009] Preferably, the second pivot axis extends outward, the abutting top is arranged on the second pivot axis, and the abutting top surface is an arc-shaped concave surface, so that the connecting rod can abut against the second pivot axis when the armrest is in the use position, thereby transmitting the force to the backrest.

[0010] Preferably, the slide groove is provided with a pushing surface, and the shaft pin is slidably arranged in the slide groove when the armrest is in the non-use position; when the armrest is rotated from the non-use position to the use position, the shaft pin pushes the pushing surface, so that the connecting rod approaches the top end.

[0011] Specifically, a locking mechanism for locking or releasing the backrest is provided between the mounting seat and the backrest. By providing the locking mechanism to lock or release the backrest, the angle of the backrest relative to the seat can be adjusted, thereby improving the convenience of use.

[0012] Specifically, the locking mechanism includes a locking rod and an elastic reset member, the locking rod is arranged on the mounting seat, and the end of the backrest close to the mounting seat is provided with at least two gears that can be engaged with the locking rod, and the mounting seat is provided with a sliding groove, and the locking rod is slidably arranged in the sliding groove to engage with or separate from the gears; the elastic reset member is arranged between the locking rod and the mounting seat, and provides an elastic force to make the locking rod engage with the gears. By using the locking rod and the elastic reset member, the backrest can be locked or released, and the purpose of adjusting the backrest angle can be achieved, and the structure is simple and easy to operate.

[0013] Specifically, a limiting rod is provided on the mounting seat to limit the angle of the backrest relative to the seat.

[0014] A means of transport comprises a frame and a seat with a constant armrest angle, wherein the seat with a constant armrest angle is arranged on the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model of a walking-replacing tool.

[0016] Figure 2 This is a state diagram of the armrest of the chair seat with a constant armrest angle of the utility model being in a use position.

[0017] Figure 3 It is an exploded view of a chair seat with armrests having a constant angle according to the utility model.

[0018] Figure 4 This is a state diagram of the armrests after the backrest of the chair seat with a constant armrest angle is adjusted.

[0019] Figure 5 This is a state diagram of the armrest of the chair seat with a constant armrest angle of the utility model being in a non-use position. DETAILED DESCRIPTION

[0020] In order to explain the technical content, structural features and effects achieved by the present invention in detail, the following is a detailed description in conjunction with the implementation modes and the accompanying drawings.

[0021] See also Figures 1 to 3The means of transport 100 of the present invention comprises a seat 1 with a constant armrest angle and a frame 2, wherein the seat 1 with a constant armrest angle is arranged on the frame 2. The seat 1 with a constant armrest angle comprises a seat 11, a backrest 12, an armrest 13 and a linkage mechanism 14, wherein a mounting seat 111 is fixedly provided on the seat 11. The backrest 12 is pivotally connected to the seat 11 through a first pivot axis a, specifically to the mounting seat 111. The armrest 13 is pivotally connected to the backrest 12 through a second pivot axis c and forms an angle A with the load-bearing surface or horizontal plane of the seat 11 when in use, and the angle A is an acute angle. The seat 11 is fixedly provided with a pivot portion 112, and the linkage mechanism 14 is arranged between the pivot portion 112, the backrest 12 and the armrest 13, so as to drive the armrest 13 to swing relative to the backrest 12 when the backrest 12 rotates relative to the seat 11, so that the angle A between the armrest 13 and the load-bearing surface of the seat 11 remains constant when in the use position.

[0022] Please see again Figure 2 and Figure 3The linkage mechanism 14 includes a connecting rod 141 and a stopper 142. One end of the connecting rod 141 is pivotally connected to the seat 11 through a third pivot axis b. Specifically, the lower end of the connecting rod 141 is pivotally connected to the pivot portion 112 through the third pivot axis b. A slide groove 141b is provided at the upper end 141 of the connecting rod. One end of the stopper 142 is slidably disposed in the slide groove 141b through an axle pin 142b. The other end of the stopper 142 is pivotally connected to the backrest 12 through the second pivot axis c. When the armrest 13 is rotated upward from the use position to the non-use position, the axle pin 142b can slide from the upper end to the lower end in the slide groove 141b. By providing the slide groove 141b, when the user gets on or off the vehicle, the armrest 13 can be driven to rotate upward around the second pivot axis c. At this time, the axle pin 142b can slide from top to bottom along the slide groove 141b, and will not interfere with the connecting rod 141, which greatly facilitates the user to get on or off the vehicle. The other end of the limiter 142 is pivoted to the backrest 12 and the second pivot axis c is fixedly connected to the armrest 13. The armrest 13, the second pivot axis c and the limiter 142 are fixed to each other. A parallelogram structure is formed between the first pivot axis a, the second pivot axis c, the third pivot axis b and the axle pin 142b, so that the angle between the armrest 13 and the load-bearing surface / horizontal plane of the seat 11 remains constant when in the use position. The armrest 13 in the present solution is in the use position, which means that the armrest 13 is in the position where it is rotated forward and opened relative to the backrest 12, and the non-use position means that the armrest 13 is in the position where it is rotated upward and folded relative to the backrest 12. The backrest 12 is provided with an abutting top portion, and the connecting rod 141 is provided with an abutting top surface 141a. When the armrest is in the use position, the shaft pin 142b is located at the upper end of the slide slot 141b, and the abutting top portion and the abutting top surface 141a abut against each other; by providing the abutting top portion on the backrest 12 and providing the abutting top surface 141a on the connecting rod 141, when the armrest 13 is in the use position, the abutting top portion and the abutting top surface 141a abut against each other, so that when the armrest 13 is in the use position, the force applied to the armrest 13 can be transmitted to the abutting top portion of the backrest 12 through the connecting rod 141, thereby avoiding the force being concentrated on the connecting rod 141, reducing the strength requirement of the connecting rod 141, thereby ensuring the service life of the connecting rod 141 and improving the stability of the seat. More specifically, the second pivot axis c extends outward, and the abutting top portion is arranged on the second pivot axis c, that is, the side surface of the portion of the second pivot axis c extending outward serves as the abutting top portion, and the abutting top surface 141a is an arc-shaped concave surface and is located on the side of the connecting rod 141 close to the armrest 13. In this way, the connecting rod 141 can abut against the second pivot axis c when the armrest 13 is in the use position, thereby transmitting the force to the backrest 12.Specifically, a push surface 141c is provided on the slide groove 141b. When the armrest 13 is in the non-use position, the limiter 142 rotates, so that the shaft pin 142b drives the connecting rod 141, so that the connecting rod 141 leaves the abutting top and slides from the upper end to the lower end in the slide groove 141b. When the armrest 13 rotates from the non-use position to the use position, the shaft pin 142b pushes the push surface 141c, so that the connecting rod 141 approaches the abutting top and finally abuts against the abutting top.

[0023] like Figure 2 and Figure 3 As shown, a locking mechanism 15 for locking or releasing the backrest 12 is provided between the mounting seat 111 and the backrest 12. By providing the locking mechanism 15 to lock or release the backrest 12, the angle of the backrest 12 relative to the seat 11 can be adjusted, thereby improving the convenience of use. Specifically, the locking mechanism 15 includes a locking rod 151 and an elastic reset member (not shown in the figure). The locking rod 151 is provided on the mounting seat 111. One end of the backrest 12 close to the mounting seat 111 is provided with at least two gears 121 that can be engaged with the locking rod 151. In this embodiment, the number of the gears 121 is two. The mounting seat 111 is provided with a sliding groove 111a. The locking rod 151 is slidably provided in the sliding groove 111a to engage with or separate from the gear 121. The elastic reset member is provided between the locking rod 151 and the mounting seat 111, and provides an elastic force to make the locking rod 151 engage with the gear 121. The elastic reset member is a tension spring. A limit rod 111b is provided on the mounting seat 111 to limit the angle of the backrest 12 relative to the seat 11. When the locking rod 151 is stuck in the first gear 121, the locking rod 151 completely locks the backrest 12. When the locking rod 151 is stuck in the second gear 121, the second gear 121 is located on one side of the backrest 12, so the locking rod 151 and the limit rod 111b jointly clamp the backrest 12. By using the locking rod 151 and the elastic reset member, the backrest 12 can be locked or released, so as to achieve the purpose of adjusting the angle of the backrest 12, with a simple structure and convenient operation.

[0024] Combining the above and Figure 1 , Figure 4 and Figure 5 The principle of maintaining a constant angle of the armrest 13 of the seat 11 of the mobility tool 100 of the present invention is described below as follows:

[0025] When the armrest 13 is in the use position, there is a certain angle A between the armrest 13 and the load-bearing surface of the seat 11. At this time, the shaft pin 142b at one end of the limiting member 142 is stuck in the pivot hole 141a, so that the armrest 13 cannot rotate in the direction close to the seat 11. When the backrest 12 is adjusted backward to a certain angle relative to the seat 11, under the action of the parallelogram composed of the seat 11, the backrest 12, the connecting rod 141 and the limiting member 142, the armrest 13 will rotate to a certain angle relative to the backrest 12, and the armrest 13 can maintain a constant angle A relative to the load-bearing surface or horizontal plane of the seat 11. When the user needs to get on or off the vehicle, the armrest 13 can be directly swung upward, and the armrest 13 rotates upward around the second pivot axis c. At the same time, the armrest 13 drives the axle pin 142b of the limit member 142 to slide from top to bottom in the slide groove 141b. Therefore, the armrest 13 can be directly opened without interfering with the connecting rod 141, thereby improving the convenience of getting on and off the vehicle.

[0026] Compared with the prior art, the utility model provides a backrest 12 and an armrest 13, and the armrest 13 is arranged on the backrest 12, so as to provide a position for the user's hands to be placed, thereby improving the comfort of use. In addition, a linkage mechanism 14 is arranged between the seat 11, the backrest 12 and the armrest 13, so that a parallelogram is formed between the seat 11, the backrest 12, the connecting rod 141 and the limiter 142, so that when the backrest 12 rotates relative to the seat 11, the parallelogram can drive the armrest 13 to rotate relative to the backrest 12 and the angle relative to the load-bearing surface of the seat 11 remains unchanged. Therefore, when the armrest 13 is in the use position, no matter what angle the backrest 12 is adjusted to, the angle A between the armrest 13 and the load-bearing surface of the seat 11 can be kept constant, which effectively improves the convenience of use, and keeps the armrest 13 in the best position to ensure the comfort of riding.

[0027] The above disclosure is only a preferred example of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A chair seat with a constant armrest angle, characterized in that: The yoke is a chain which is connected to the bottom of the second support frame, and the chain is connected to the bottom of the second support frame by a spring which is arranged on the hinge part of the first and second support frames for use with the yoke.

2. The chair seat with a constant armrest angle as claimed in claim 1, characterized in that: The seat is provided with a mounting seat, the backrest is pivotally connected to the mounting seat, the seat is provided with a pivoting portion, and the connecting rod is pivotally connected to the pivoting portion.

3. The chair seat with constant armrest angle according to claim 1, characterized in that: The second pivot axis extends outwards, the abutting top portion is arranged on the second pivot axis, and the abutting top surface is an arc-shaped concave surface.

4. The chair seat with constant armrest angle according to claim 1, characterized in that: The slide groove is provided with a pushing surface, and the shaft pin is slidably arranged in the slide groove when the armrest is in the non-use position; when the armrest is rotated from the non-use position to the use position, the shaft pin pushes the pushing surface, so that the connecting rod approaches the top end.

5. The chair seat with constant armrest angle as claimed in claim 2, characterized in that: A locking mechanism for locking or releasing the backrest is provided between the mounting seat and the backrest.

6. The chair seat with a constant armrest angle as claimed in claim 5, characterized in that: The locking mechanism includes a locking rod and an elastic return member, the locking rod is arranged on the mounting seat, and the backrest is provided with at least two gears that can be engaged with the locking rod at one end close to the mounting seat, and a sliding groove is provided on the mounting seat, and the locking rod is slidably arranged in the sliding groove to engage with or separate from the gears; the elastic return member is arranged between the locking rod and the mounting seat, and provides an elastic force to enable the locking rod to engage with the gears.

7. The chair seat with a constant armrest angle as claimed in claim 6, characterized in that: The mounting seat is provided with a limiting rod to limit the angle of the backrest relative to the seat.

8. A means of transport, characterized in that: The invention comprises a vehicle frame and a seat with a constant armrest angle as claimed in any one of claims 1 to 7, wherein the seat with a constant armrest angle is arranged on the vehicle frame.

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