Bicycle with adjustable backseat

Abstract

The utility model relates to the field of bicycles, in particular to a bicycle with an adjustable backseat, which comprises the backseat, supporting tubes are symmetrically welded on two sides of the middle of the backseat, an empty groove is arranged on the surface of one end of each supporting tube, and one end of the inner side of each empty groove is fixedly connected with a tension spring. A transverse adjusting rod is slidably connected to the end, located at the tension spring, of the inner side of the empty groove, one end of the transverse adjusting rod is located on the outer side of the empty groove, a limiting box is fixedly connected to the side, close to a notch of the empty groove, of the bottom of the supporting pipe, a movable groove is vertically formed in the inner side of the limiting box, and a first spring is installed in the movable groove; the top of the first spring is fixedly connected with a clamping block, and a plurality of clamping grooves are formed in the bottom of the transverse adjusting rod at equal intervals in the axis direction of the transverse adjusting rod. By designing the transverse adjusting rod, the length of the rear seat can be adjusted, goods of different sizes or people of different body types can be loaded conveniently, the backrest can abut against the rear seat, sitting is more stable, and the goods can be conveniently bound through a rope.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycles, in particular to a bicycle with an adjustable rear seat. Background Art

[0002] Since bicycles are low-cost and green, they are a frequently used means of transportation in our lives. The back seat of a bicycle is a major part of a bicycle for carrying people or loads. After the back seat is installed, it is fixed and cannot be adjusted. When it is necessary to load larger goods or larger people, the back seat space becomes cramped, which brings inconvenience to people. For this reason, we propose a bicycle with an adjustable back seat. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the utility model provides a bicycle with an adjustable rear seat. A lateral adjustment rod is designed that can be pulled out and the length of the rear seat can be adjusted, which is convenient for loading goods of different volumes or people of different body shapes. The backrest can be pressed tightly, making sitting more stable and also convenient for binding the goods with ropes.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a bicycle with an adjustable rear seat, comprising a rear seat, support tubes are symmetrically welded on both sides of the middle of the rear seat, and an empty groove is opened on the surface of one end of the support tube, and a tension spring is fixedly connected to one end of the inner side of the empty groove, and one end of the tension spring inside the empty groove is slidably connected to a transverse adjustment rod, and one end of the transverse adjustment rod is outside the empty groove, and a limit box is fixedly connected to the side of the bottom of the support tube near the notch of the empty groove, and a movable groove is vertically opened on the inner side of the limit box, and a first spring is installed inside the movable groove, and a clamping block is fixedly connected to the top of the first spring, and a plurality of clamping grooves are equidistantly provided at the bottom of the transverse adjustment rod along its axial direction, and the top of the clamping block is clamped in one of the inner sides of the clamping grooves, and a pull rope is fixedly connected to the bottom of the clamping block, and one end of the pull rope passes through the first spring and the movable groove and is outside the limit box, and the end of the transverse adjustment rod outside the empty groove is fixedly connected to a backrest.

[0005] As an optimal technical scheme of the utility model, the backrest includes a first back plate and a second back plate, the second back plate is located above the first back plate, and both sides of the bottom of the second back plate are fixedly connected to the vertical adjustment rod, and the top of the first back plate is provided with sliding grooves for the vertical adjustment rod to be inserted, and the top of the surface of one side of the first back plate is provided with a pressing groove, and a pressing block is installed on the inner side of the pressing groove, and a second spring is provided at both ends of the connection between the pressing block and the inner side of the pressing groove, and a vertical sliding groove is provided on the surface of the pressing block, and the middle part of one end of the pressing block located on the inner side of the pressing groove is fixedly connected to a cross bar, and the cross bar passes through the inner side of the vertical sliding groove, and a plurality of limit grooves are equidistantly provided on the surface of the vertical sliding groove away from the pressing block, and a limit block is engaged with the inner side of one of the limit grooves, and the limit block is fixedly connected to the cross bar.

[0006] As a preferred technical solution of the utility model, the tension spring is fixedly connected to the transverse adjustment rod, the transverse adjustment rod is slidably connected to the empty slot, and one end of the pull rope outside the limit box is fixedly connected to a pull ring.

[0007] As a preferred technical solution of the utility model, a side of the top of the clamping block away from the tension spring is arranged as an inclined surface, and the clamping block is slidably connected to the movable groove.

[0008] As a preferred technical solution of the utility model, the first backboard and the second backboard are located above one side of the rear seat, and the first backboard and the second backboard are both provided with cushions on one side surface close to the rear seat.

[0009] As a preferred technical solution of the utility model, the pressing block is slidably connected to the pressing groove, the cross bar is slidably connected to the vertical sliding groove, and one end of the pressing block is located outside the pressing groove.

[0010] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0011] 1. The horizontal adjustment rod can be pulled out to adjust the length of the rear seat, which is convenient for loading goods of different volumes or people of different body shapes. The backrest can be pressed tightly, making sitting more stable and convenient for binding the goods with ropes.

[0012] 2. The height of the second backrest is designed to be adjustable, which can improve the supporting effect and stability when loading higher goods, and also make it easier for the occupants to adjust to a comfortable leaning position. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0014] Figure 2 This is a side view structural diagram of the backrest of the utility model;

[0015] Figure 3 For this utility model Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0016] Figure 4 For this utility model Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0017] Figure 5 It is a structural schematic diagram of one side of the vertical adjustment rod of the utility model;

[0018] Figure 6 It is a structural schematic diagram of the other side of the vertical adjustment rod of the utility model.

[0019] Among them: 1. Support tube; 2. Empty slot; 3. Tension spring; 4. Horizontal adjustment rod; 5. First support plate; 6. Second support plate; 7. Vertical adjustment rod; 8. Card slot; 9. Card block; 10. Limit box; 11. Movable slot; 12. First spring; 13. Pull ring; 14. Pressing slot; 15. Pressing block; 16. Second spring; 17. Cross bar; 18. Limiting block; 19. Limiting slot; 20. Vertical slide slot; 21. Cushion. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, purpose and efficacy of the utility model easy to understand, the utility model is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the utility model. The experimental methods in the following embodiments are conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0021] Embodiment:

[0022] like Figure 1 , Figure 3As shown, a bicycle with an adjustable rear seat comprises a rear seat, wherein support tubes 1 are symmetrically welded on both sides of the middle of the rear seat, a hollow groove 2 is provided on the surface of one end of the support tube 1, a tension spring 3 is fixedly connected to one end of the inner side of the hollow groove 2, a lateral adjustment rod 4 is slidably connected to one end of the tension spring 3 inside the hollow groove 2, one end of the lateral adjustment rod 4 is outside the hollow groove 2, a limit box 10 is fixedly connected to one side of the bottom of the support tube 1 near the notch of the hollow groove 2, a movable groove 11 is vertically provided inside the limit box 10, a first spring 12 is installed inside the movable groove 11, and the first spring 12 is installed inside the movable groove 11. A clamping block 9 is fixedly connected to the top of 12, and a plurality of clamping grooves 8 are equidistantly arranged at the bottom of the transverse adjustment rod 4 along its axial direction. The top of the clamping block 9 is engaged with the inner side of one of the clamping grooves 8, and a draw rope is fixedly connected to the bottom of the clamping block 9. One end of the draw rope passes through the first spring 12 and the movable groove 11 and is located outside the limit box 10. The end of the transverse adjustment rod 4 outside the empty groove 2 is fixedly connected to the backrest, the tension spring 3 is fixedly connected to the transverse adjustment rod 4, and the transverse adjustment rod 4 is slidably connected to the empty groove 2. The end of the draw rope outside the limit box 10 is fixedly connected to the pull ring 13;

[0023] Since bicycles have low-cost and green environmental protection performance, they are a kind of transportation tool that we often use in our lives. The rear seat of a bicycle is a main part of a bicycle for carrying people or loads. After the rear seat of a bicycle is installed, the rear seat of the bicycle is fixed and cannot be adjusted. When it is necessary to load larger goods or larger people, the space of the rear seat is relatively cramped, which brings inconvenience to people. When it is necessary to adjust the rear seat, first pull the pull ring 13 downward, and the pull ring 13 pulls the clamping block 9 downward through the pull rope to slide, and the first spring 12 is compressed by force until the top of the clamping block 9 leaves the inside of the clamping slot 8, and then pulls the lateral adjustment rod 4 outward to drive the backrest to move outward, and the tension spring 3 is stretched and deformed by force. After being pulled to the space required for use, the pull ring 13 is released, and at this time, the first spring 12 pushes the clamping block 9 to move upward and engage in another clamping slot 8. At this time, the length adjustment of the rear seat is completed; by designing that the lateral adjustment rod 4 can be pulled and pulled, the length of the rear seat can be adjusted, which is convenient for loading goods of different volumes or people of different sizes, and it can be pressed against by the backrest, so that it is more stable to sit, and it is also convenient to use ropes to bind the goods.

[0024] like Figure 2 , Figure 4 , Figure 5 and Figure 6As shown, in other embodiments, the present embodiment discloses that the backrest includes a first backrest plate 5 and a second backrest plate 6, the second backrest plate 6 is located above the first backrest plate 5, both sides of the bottom of the second backrest plate 6 are fixedly connected with vertical adjustment rods 7, both sides of the top of the first backrest plate 5 are provided with sliding grooves for inserting the vertical adjustment rods 7, a pressing groove 14 is provided on the top of one side of the first backrest plate 5, a pressing block 15 is installed inside the pressing groove 14, and second springs 16 are provided at both ends of the connection between the pressing block 15 and the inner side of the pressing groove 14, and the surface of the pressing block 15 is provided with a pressing groove 14. A vertical slide groove 20 is provided, and a cross bar 17 is fixedly connected to the middle of one end of the pressing block 15 inside the pressing groove 14, and the cross bar 17 passes through the inside of the vertical slide groove 20. A plurality of limit grooves 19 are equidistantly provided on the surface of one side of the vertical slide groove 20 away from the pressing block 15, and a limit block 18 is engaged inside one of the limit grooves 19, and the limit block 18 is fixedly connected to the cross bar 17, the pressing block 15 is slidably connected to the pressing groove 14, the cross bar 17 is slidably connected to the vertical slide groove 20, and one end of the pressing block 15 is outside the pressing groove 14;

[0025] When the height of the backrest needs to be adjusted, the pressing block 15 is first squeezed toward the inside of the pressing groove 14, the second spring 16 is compressed by force, and the cross bar 17 moves laterally on the inside of the vertical slide groove 20, driving the limit block 18 to leave the inside of the limit groove 19, and then the second back plate 6 is pulled upward, the vertical adjustment rod 7 rises along the sliding groove, and the height of the second back plate 6 changes. After adjusting the required height, the pressing block 15 is released. At this time, the second spring 16 is not subjected to force, pushing the pressing block 15 back to its original position, driving the cross bar 17 back to its original position, and the limit block 18 engages with the inside of another limit groove 19, and the height adjustment of the second back plate 6 is completed; by designing that the height of the second back plate 6 can be adjusted, it is convenient to load higher goods, can improve the supporting effect, improve stability, and also facilitate the sitting personnel to adjust a comfortable leaning position.

[0026] like Figure 3 As shown, in other embodiments, this embodiment discloses that the side of the top of the block 9 away from the tension spring 3 is set as an inclined surface, and the block 9 is slidably connected to the movable groove 11; when the backrest is pushed by an external force, the transverse adjustment rod 4 can move toward the inside of the empty groove 2, which is convenient for directly adjusting the tightness of the backrest clamping.

[0027] like Figure 1 As shown, in other embodiments, this embodiment discloses that the first backrest 5 and the second backrest 6 are located above one side of the rear seat, and a cushion 21 is provided on the surface of the first backrest 5 and the second backrest 6 on one side close to the rear seat, which serves as a certain buffer space and improves the comfort of the passengers.

[0028] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A bicycle with an adjustable rear seat, comprising a rear seat, characterized in that: Support tubes (1) are symmetrically welded on both sides of the middle of the rear seat, a hollow groove (2) is provided on the surface of one end of the support tube (1), a tension spring (3) is fixedly connected to one end of the inner side of the hollow groove (2), a transverse adjustment rod (4) is slidably connected to one end of the tension spring (3) on the inner side of the hollow groove (2), one end of the transverse adjustment rod (4) is located outside the hollow groove (2), a limit box (10) is fixedly connected to one side of the bottom of the support tube (1) close to the notch of the hollow groove (2), a movable groove (11) is vertically provided on the inner side of the limit box (10), and the movable groove (11) is fixedly connected to the inner side of the hollow groove (2). A first spring (12) is installed inside the groove (11), and a clamping block (9) is fixedly connected to the top of the first spring (12). The bottom of the transverse adjustment rod (4) has a plurality of clamping grooves (8) equidistantly arranged along the axial direction thereof, and the top of the clamping block (9) is clamped in the inner side of one of the clamping grooves (8). The bottom of the clamping block (9) is fixedly connected to a pull rope, and one end of the pull rope passes through the first spring (12) and the movable groove (11) and is located outside the limit box (10). One end of the transverse adjustment rod (4) located outside the empty groove (2) is fixedly connected to a backrest.

2. A bicycle with adjustable rear seat according to claim 1, characterized in that: The backrest comprises a first backrest plate (5) and a second backrest plate (6), wherein the second backrest plate (6) is located above the first backrest plate (5), and both sides of the bottom of the second backrest plate (6) are fixedly connected with vertical adjustment rods (7), and both sides of the top of the first backrest plate (5) are provided with sliding grooves for plugging the vertical adjustment rods (7), and a pressing groove (14) is provided on the top of one side surface of the first backrest plate (5), and a pressing block (15) is installed inside the pressing groove (14), and the pressing block (15) and the inner side of the pressing groove (14) are connected at both ends. A second spring (16), a vertical slide groove (20) is provided on the surface of the pressing block (15), a cross bar (17) is fixedly connected to the middle of one end of the pressing block (15) inside the pressing groove (14), and the cross bar (17) passes through the inside of the vertical slide groove (20), and a plurality of limit grooves (19) are equidistantly provided on the surface of one side of the vertical slide groove (20) away from the pressing block (15), a limit block (18) is engaged inside one of the limit grooves (19), and the limit block (18) is fixedly connected to the cross bar (17).

3. The bicycle with adjustable rear seat according to claim 1, characterized in that: The tension spring (3) is fixedly connected to the transverse adjustment rod (4), the transverse adjustment rod (4) is slidably connected to the empty slot (2), and one end of the pull rope outside the limit box (10) is fixedly connected to a pull ring (13).

4. The bicycle with adjustable rear seat according to claim 1, characterized in that: The side of the top of the clamping block (9) away from the tension spring (3) is arranged as an inclined surface, and the clamping block (9) is slidably connected to the movable groove (11).

5. The bicycle with adjustable rear seat according to claim 2, characterized in that: The first backrest board (5) and the second backrest board (6) are located above one side of the rear seat, and the surfaces of the first backrest board (5) and the second backrest board (6) on one side close to the rear seat are both provided with a soft cushion (21).

6. The bicycle with adjustable rear seat according to claim 2, characterized in that: The pressing block (15) is slidably connected to the pressing groove (14), the cross bar (17) is slidably connected to the vertical sliding groove (20), and one end of the pressing block (15) is located outside the pressing groove (14).

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