CN216258934U

CN216258934U - Backrest angle adjusting structure of exercise bicycle seat

Info

Publication number: CN216258934U
Application number: CN202122735096.4U
Authority: CN
Inventors: 项乐宏; 林涛; 赵大江
Original assignee: Loctek Ergonomic Technology Co Ltd
Current assignee: Loctek Ergonomic Technology Co Ltd
Priority date: 2021-11-09
Filing date: 2021-11-09
Publication date: 2022-04-12
Anticipated expiration: 2031-11-09

Abstract

The utility model discloses a backrest angle adjusting structure of a seat of a body-building vehicle, which comprises a seat plate supporting plate component capable of moving back and forth relative to a seat plate supporting frame, wherein a connecting seat at the lower end of a backrest is fixedly connected with an Contraband-shaped connecting block with an upward opening, two vertical plates of the Contraband-shaped connecting block are hinged with the rear ends of two side plates of the seat plate supporting plate component through respective hinge pins, at least one first pressure spring is arranged in the Contraband-shaped connecting block, and two ends of each first pressure spring are respectively abutted to a transverse plate of the Contraband-shaped connecting block and the bottom surface of the rear end of the seat plate supporting plate component; the rear end of one side plate of the supporting plate component is fixedly connected with an indexing pin, and the front end of the indexing pin is inserted into a locking hole of a vertical plate of the Contraband-shaped connecting block to lock the relative position of the side plate and the vertical plate or is separated from the locking hole of the vertical plate of the Contraband-shaped connecting block to unlock the side plate and the vertical plate. The backrest angle adjusting structure is relatively simple, the locking or unlocking is relatively convenient, and the self-adaptability and the comfort of the backrest are good.

Description

Backrest angle adjusting structure of exercise bicycle seat

Technical Field

The utility model relates to the technical field of fitness equipment, in particular to a backrest angle adjusting structure of a seat of a fitness bike.

Background

Along with the breakthrough of people in understanding and thinking of the novel concept of fitness and work and study, the fitness while working or studying becomes possible and practical, for example, people sit on the seat of the exercise bicycle, work or study while treading the treading device of the exercise bicycle becomes a normal state gradually, and meanwhile, people need to use the seat as an office chair, a study chair or other daily chairs when not exercising.

The exercise bicycle in the prior art has various types and structures, and the backrest angle adjusting structure of the exercise bicycle seat in the prior art also has various types and long functions. However, in the actual use process, the backrest angle adjusting structure of the exercise bicycle seat in the prior art still has the following defects: the angle adjustment structure of the backrest of the chair is still relatively complex, locking or unlocking is relatively troublesome, and the self-adaptability and comfort of the backrest are insufficient during body building and as an office chair, a study chair or other daily chairs.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a backrest angle adjusting structure of a seat of an exercise bicycle, which has a relatively simple backrest angle adjusting structure, relatively convenient locking or unlocking and good backrest self-adaptability.

The technical scheme of the utility model is that the backrest angle adjusting structure of the exercise bicycle seat comprises a seat plate supporting plate component which can move back and forth relative to a seat plate supporting frame, a connecting seat at the lower end of a backrest is fixedly connected with an Contraband-shaped connecting block with an upward opening, two vertical plates of the Contraband-shaped connecting block are hinged with the rear ends of two side plates of the seat plate supporting plate component through respective hinge pins, at least one first pressure spring is arranged in the Contraband-shaped connecting block, and two ends of each first pressure spring respectively abut against a transverse plate of the Contraband-shaped connecting block and the bottom surface of the rear end of the seat plate supporting plate component, so that the backrest can adaptively adjust the comfort level of the backrest angle and the sitting posture around the two hinge pins under the force application of a person; the rear end of one side plate of the supporting plate component is fixedly connected with an indexing pin, and the front end of the indexing pin is inserted into a locking hole of a vertical plate of the Contraband-shaped connecting block to lock the relative position of the side plate and the vertical plate or is separated from the locking hole of the vertical plate of the Contraband-shaped connecting block to unlock the side plate and the vertical plate.

After adopting the structure, the backrest angle adjusting structure of the exercise bicycle seat has the following advantages: the backrest and the seat board supporting plate assembly are firmly and reliably connected, the angle adjusting structure of the seat backrest is relatively simple, the positions of the side plates and the vertical plates need to be locked, namely the positions of the backrest and the seat board supporting plate assembly need to be locked or unlocked, only the front end of the index pin needs to be inserted into the lock hole, or the index pin is pulled outwards to enable the front end of the index pin to be separated from the lock hole and axially limited, and the locking or unlocking is relatively convenient and reliable. Particularly, the angle adjustment of the backrest and the comfort level of the sitting posture of the user are adaptively adjusted by at least one first pressure spring according to the self weight and the force application force of the user, the self-adaptability, the applicability and the comfort level of the backrest are very outstanding and obvious when the backrest is used for body building, office or study or used as other daily chairs, and if the backrest is not provided with an adjusting function such as body building and treading, the angle of the backrest is locked by adopting the locking function of the index pin, so that the good experience and the obtaining feeling of the user are enhanced.

Furthermore, the number of the first pressure springs is two, and the two first pressure springs are respectively positioned at the arc-shaped notches at the two sides of the front end of the connecting seat. After the structure more than adopting, the connection structure of back and bedplate backup pad subassembly is compacter, and the distribution of the spring force of first pressure spring is more reasonable, and the angle modulation of back and the comfort level of user's position of sitting are better by the self-adaptation regulating effect of first pressure spring, have further improved the self-adaptability, the suitability and the travelling comfort of back.

Furthermore, each first through hole is symmetrically arranged on each of the two side plates, each hinge pin is fixedly connected in each first through hole, and the front end of each hinge pin is rotatably connected with the second through holes on the two vertical plates of the Contraband-shaped connecting block. After the structure is adopted, the hinge structure of the vertical plate and the side plate is simpler and more reliable, the relative range of the rotation around the hinge pin is larger, and the effect of the angle adjustment of the backrest and the self-adaptive adjustment of the sitting posture of a user are better.

Furthermore, an axially upward stress convex column is welded at the top of the first pressure spring. After the structure more than adopting, the bottom surface of bedplate backup pad rear end is more concentrated on exerting pressure of first pressure spring, and the sensitivity of the pressure of first pressure spring or bullet is higher, and the angle modulation of back and the comfort level of user's position of sitting are better by the self-adaptation regulation's of first pressure spring effect.

Furthermore, a third through hole is formed in the rear end of one side plate of the seat plate supporting plate assembly, a connecting ring with a first threaded hole is fixedly connected into the third through hole, and an external thread sleeve of a connecting sleeve with the outer diameter of a dividing pin being three steps is screwed in the first threaded hole of the connecting ring. After the connecting structure is adopted for the indexing pin, the indexing pin is more convenient to install, and the reliability, the stability and the flexibility of operation are better.

Furthermore, a connector with a second threaded hole is axially and fixedly connected in a first central hole of a round outer sleeve with a holding part of the index pin, a large-diameter shaft of a three-step connecting shaft is slidably sleeved in a second central hole of a connecting sleeve with the outer diameter of three steps, a small-diameter threaded column of the three-step connecting shaft is screwed in the second threaded hole of the connector, the connector and a medium-diameter shaft of the three-step connecting shaft are in sliding fit with a third central hole of an end plate of a round sleeve of the connecting sleeve with the outer diameter of three steps, a second pressure spring is sleeved on the connector and the medium-diameter shaft of the three-step connecting shaft, one end of the second pressure spring abuts against the end plate of the round sleeve of the connecting sleeve with the outer diameter of three steps, and the other end of the second pressure spring abuts against a step surface of the large-diameter shaft of the three-step connecting shaft so as to lock the relative positions of the side plate and the vertical plate; the cross section of the central hole of the round outer sleeve is a regular hexagonal hole matched with a regular hexagonal sleeve of the connecting sleeve with the outer diameter of three steps, the inner end face of the round outer sleeve is provided with a concave step face which overcomes the spring force, axially separates from the outer end of the regular hexagonal sleeve and rotates for a preset angle and then is pressed against the outer end of the regular hexagonal sleeve under the spring action force of the second pressure spring, so that the large-diameter shaft of the three-step connecting shaft is axially retracted into the inner end face of the connecting sleeve with the outer diameter of three steps to be unlocked. After the indexing pin adopts the above specific structure, the connecting structure between the parts of the indexing pin is more reasonable, the assembly is more convenient, the locking is more reliable and more stable, and the unlocking operation is more flexible and more convenient.

Drawings

Fig. 1 is a schematic structural view of the exercise bicycle seat when the backrest angle adjusting structure of the exercise bicycle seat of the present invention is mounted on the exercise bicycle seat.

Fig. 2 is a left side view schematic diagram of the exercise seat back adjustment structure of the present invention.

Fig. 3 is a schematic diagram of a right-side plan view and a partially exploded structure of the exercise seat back adjustment structure of the present invention.

Fig. 4 is a schematic structural view of a seat plate support plate assembly in the present invention.

Fig. 5 is a schematic structural view of the seat plate support bracket of the present invention.

Fig. 6 is a schematic structural view of the back frame and the back connecting seat in the present invention.

Fig. 7 is a schematic view of the Contraband-shaped connecting block according to the present invention.

Fig. 8 is a schematic structural view of the first pressure spring in the present invention.

Fig. 9 is a schematic view of the outer structure of the index pin of the present invention.

Fig. 10 is a first exploded view of the index pin of the present invention.

Fig. 11 is a second exploded view of the index pin of the present invention.

Fig. 12 is a structural schematic diagram of a connecting sleeve with an outer diameter of a dividing pin being three steps in the utility model I (an end plate of a circular sleeve is shown).

Fig. 13 is a second structural view of a connecting sleeve with a three-step outer diameter of the index pin according to the present invention (showing an end plate of a circular sleeve).

Shown in the figure: 1. a headrest, 2, a backrest, 3, a handrail, 4, a seat board, 5, a body of the exercise bicycle, 6, front legs of the exercise bicycle, 7, a universal wheel, 8, a treading device for exercise, 9, rear legs of the exercise bicycle, 10, a universal wheel mounting rack, 11, a backrest rack, 12, a hinge pin, 13, a dividing pin, 14, a connecting seat, 15, Contraband-shaped connecting blocks, 16, an external thread sleeve, 17, a connecting ring, 18, a third through hole, 19, a first pressure spring, 20, a vertical plate, 21, a side plate, 22, a backrest plate, 23, a sliding rod, 24, a seat board supporting plate component, 25, a lock hole, 26, a transverse plate, 27, a second through hole, 28, a stress convex column, 29, an inner end surface of a connecting sleeve with three steps in outer diameter, 30, a handheld part, 31, a round outer sleeve, 32, a connecting joint, 33, a second threaded hole, 34, a second pressure spring, 35, a three-step connecting shaft, 36, a large-diameter shaft, 37, and a step surface of the large-diameter shaft, 38. the middle-diameter shaft 39, the threaded column 40, the circular sleeve 41, the regular hexagon sleeve 42, the connecting sleeve with the outer diameter of three steps 43, the first central hole 44, the concave step surface 45, the second central hole 46, the end plate 47, the third central hole 48, the lifting upright column 49, the seat plate supporting plate 50, the seat plate supporting frame 51, the sleeve 52 and the arc notch.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It is to be noted that the description of the embodiments is provided to aid understanding of the present invention, and is not intended to limit the present invention. In addition, the technical features involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Fig. 1, 2, 3, 4, 5, 6, which show the structure of the exercise bike seat to which the backrest angle adjusting structure of the exercise bike seat of the present invention is mounted: the seat plate supporting frame 50 is arranged on a lifting upright post 48 of the body 5 of the exercise bicycle with the exercise treading device 8, two sleeve pipes 51 of the seat plate supporting frame 50 are respectively matched with a sliding rod 23 in a sliding way, and the two sliding rods 23 are fixedly connected with a seat plate supporting plate component 24 through screws or in a screwed way. The seat plate supporting component 24 is fixedly connected with the seat plate 4 through a screw. The seat board 4 is also called a seat board and can comprise a seat board connecting board and a seat cushion or a cushion. The seat plate connecting plate is fixedly connected with the seat plate supporting plate component 24 by screw threads, and can be screwed with the cushion by screws. The seat board connecting plate can be screwed with a handrail 3 by adopting a screw. The backrest 2 may include a backrest frame 11 and a backrest plate 22. The headrest 1 can be arranged at the top end of the backrest 2. The lower part of the body 5 of the body-building vehicle is connected with front legs 6 of the body-building vehicle, and the front legs 6 of the body-building vehicle can be composed of an inclined supporting tube and a horizontal supporting tube. The two ends of the horizontal supporting pipe can be provided with universal wheel mounting racks 10, and each universal wheel mounting rack 10 is provided with a universal wheel 7. The lower part of the body 5 of the exercise bicycle is also connected with a rear leg 9 of the exercise bicycle, the rear leg 9 of the exercise bicycle can be composed of two approximately horizontal supporting tubes with an included angle of about 90 degrees, the end part of each approximately horizontal supporting tube can also be provided with a universal wheel mounting rack 10, and each universal wheel mounting rack 10 is also provided with a universal wheel 7. The stepping device 8 is also called a stepping device or a pedaling device, etc. The seat plate support frame 50 is also called a seat plate support frame.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and 13.

The backrest angle adjusting structure of the exercise bicycle seat of the present invention comprises the seat plate support plate assembly 24 described above which is movable forward and backward relative to the seat plate support frame 50.

The lower end of the backrest 2, specifically the connecting seat 14 at the lower end of the backrest frame 11, is fixedly connected, for example, by screwing a plurality of screws with an Contraband-shaped connecting block 15 with an upward opening, and the two vertical plates 20 of the Contraband-shaped connecting block 15 are hinged with the rear ends of the two side plates 21 of the supporting plate assembly 24 through respective hinge pins 12. That is, one vertical plate 20 of the Contraband-shaped connecting block 15 is hinged to the rear end of one side plate 21 of the supporting plate assembly 24 through a hinge pin 12, and the other vertical plate 20 of the Contraband-shaped connecting block 15 is hinged to the rear end of the other side plate 21 of the supporting plate assembly 24 through another hinge pin 12. The hinge connection structure may be specifically that two side plates 21 are symmetrically provided with a first through hole (not labeled in the figures), a respective hinge pin 12 is fixedly connected in the respective first through hole, the front end of the hinge pin 12 is rotatably connected or hinged with the second through hole 27 on two vertical plates 20 of the Contraband-shaped connecting block 15, that is, the front end of one hinge pin 12 is rotatably connected or hinged with the second through hole 27 on one vertical plate 20 of the Contraband-shaped connecting block 15, and the front end of the other hinge pin 12 is rotatably connected or hinged with the second through hole 27 on the other vertical plate 20 of the Contraband-shaped connecting block 15. The fixed connection is realized by welding the hinge pin 12 after penetrating through the first through hole at the rear end of the side plate 21. At least one first compression spring 19 is arranged in the Contraband-shaped connecting piece 15. The two first compression springs 19 are preferably arranged at the arc-shaped notches 52 at the two sides of the front end of the connecting seat 14. Two ends of each first compression spring 19 respectively abut against the transverse plate 26 of the Contraband-shaped connecting block 15 and the bottom surface of the rear end of the seat plate supporting plate 49, so that the backrest 2 can be self-adaptively adjusted in angle and sitting comfort around the two hinge pins 12 under the force applied by a person. The top of the first pressure spring 19 can also be welded with an axially upward stress convex column 28. An indexing pin 13 is fixedly connected to the rear end of one side plate 21 of the support plate assembly 24, and the indexing pin 13 is used for inserting the front end into a locking hole 25 of a vertical plate 20 of the Contraband-shaped connecting block 15 to lock the relative positions of the side plate 21 and the vertical plate 20 or disengaging from the locking hole 25 of a vertical plate 20 of the Contraband-shaped connecting block 15 to unlock the side plate 21 and the vertical plate 20, namely the vertical plate 20 and the side plate 21 can rotate relatively around the hinge pin 12. The number of the first compression springs 19 may be three, etc.

The rear end of the side plate 21 is fixedly connected with an index pin 13, and the rear end of the side plate 21 of the supporting plate assembly 24 is provided with a third through hole 18, the third through hole 18 is fixedly connected with a connecting ring 17 with a first threaded hole (not marked in the figure) by welding or adhesive or screwing, and the external thread sleeve 16 of the connecting sleeve 42 with three steps of external diameter of the index pin 13 is screwed in the first threaded hole of the connecting ring 17.

A connecting head 32 with a second threaded hole 33 is axially fixedly connected in a first central hole 43 of a round outer sleeve 31 with a handheld part 30 of the index pin 13, a large-diameter shaft 36 of a three-step connecting shaft 35 is slidably sleeved in a second central hole 45 of a connecting sleeve 42 with a three-step outer diameter, a small-diameter threaded column 39 of the three-step connecting shaft 35 is screwed in the second threaded hole 33 of the connecting head 32, the connecting head 32 and a middle-diameter shaft 38 of the three-step connecting shaft 35 are in sliding fit with a third central hole 47 of an end plate 46 of a round sleeve 40 of the connecting sleeve 42 with a three-step outer diameter, a second pressure spring 34 is sleeved on the connecting head 32 and the middle-diameter shaft 38 of the three-step connecting shaft 35, and one end of the second compression spring 34 abuts against an end plate 46 of the circular sleeve 40 of the connecting sleeve 42 with the outer diameter of three steps, and the other end of the second compression spring 34 abuts against a step surface 37 of a large-diameter shaft of the three-step connecting shaft 35, so that the relative position of the side plate 21 and the vertical plate 20 is locked. The cross section of the first central hole 43 of the round outer sleeve 31 is a regular hexagonal hole matched with the regular hexagonal sleeve 41 of the connecting sleeve 42 with the outer diameter of three steps, and the inner end surface of the round outer sleeve 31 is provided with an inner concave step surface 44 which overcomes the spring force, axially separates from the outer end of the regular hexagonal sleeve 41, rotates for a preset angle and then is propped against the outer end of the regular hexagonal sleeve 41 under the spring action of the second pressure spring 34 so as to axially retract the large-diameter shaft 36 of the three-step connecting shaft 35 into the inner end surface 29 of the connecting sleeve with the outer diameter of three steps for unlocking. It will be understood that six concave steps 44 are provided, corresponding to six corners of the regular hexagonal sleeve 41. The small-diameter threaded column 39 can also be directly called the threaded column 39.

The specific structure of the first central hole 43 having the connector 32 axially and fixedly connected thereto may be that a through hole may be formed in the center of the first central hole 43, i.e., the center of the arch-shaped plate of the handheld portion 30, and the connector 32 is fixedly connected to the through hole, for example, the connector 32 may be in interference fit, may be screwed, and may be adhesively connected to axially limit the connector 32 and the handheld portion 30. A pair of lateral grooves may also be provided on the outer circumference of the connector 32, which snap fit into a pair of radial lugs in the through-hole to axially limit both the connector 32 and the hand grip 30.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A backrest angle adjusting structure of a seat of an exercise bike comprises a seat plate supporting plate component capable of moving back and forth relative to a seat plate supporting frame, and is characterized in that a connecting seat at the lower end of a backrest is fixedly connected with an Contraband-shaped connecting block with an upward opening, two vertical plates of the Contraband-shaped connecting block are hinged with the rear ends of two side plates of the seat plate supporting plate component through respective hinge pins, at least one first pressure spring is arranged in a Contraband-shaped connecting block, and two ends of each first pressure spring respectively abut against a transverse plate of the Contraband-shaped connecting block and the bottom surface of the rear end of the seat plate supporting plate component, so that the backrest can adaptively adjust the backrest angle and the sitting posture comfort level around the two hinge pins under the force application of a person; the rear end of one side plate of the supporting plate component is fixedly connected with an indexing pin, and the front end of the indexing pin is inserted into a locking hole of a vertical plate of the Contraband-shaped connecting block to lock the relative position of the side plate and the vertical plate or is separated from the locking hole of the vertical plate of the Contraband-shaped connecting block to unlock the side plate and the vertical plate.

2. The backrest angle adjusting structure of exercise bike seat as claimed in claim 1, wherein: the two first pressure springs are respectively positioned at the arc-shaped notches at the two sides of the front end of the connecting seat.

3. The backrest angle adjusting structure of exercise bike seat as claimed in claim 1, wherein: the two side plates are symmetrically provided with first through holes, respective hinge pins are fixedly connected in the respective first through holes, and the front ends of the hinge pins are rotatably connected with second through holes on two vertical plates of the Contraband-shaped connecting block.

4. The backrest angle adjusting structure of exercise bike seat as claimed in claim 1, wherein: an axially upward stress convex column is welded at the top of the first pressure spring.

5. The backrest angle adjusting structure of exercise bike seat as claimed in claim 1, wherein: the rear end of one side plate of the seat plate supporting plate component is provided with a third through hole, a connecting ring with a first threaded hole is fixedly connected in the third through hole, and the external thread of the connecting sleeve with the external diameter of three steps of the indexing pin is sleeved in the first threaded hole of the connecting ring in a screwing manner.

6. The backrest angle adjusting structure of an exercise bike seat as claimed in claim 1 or 5, wherein: a connector with a second threaded hole is axially and fixedly connected in a first central hole of a circular outer sleeve with a handheld part of the index pin, a large-diameter shaft of a three-step connecting shaft is slidably sleeved in a second central hole of a connecting sleeve with a three-step outer diameter, a small-diameter threaded column of the three-step connecting shaft is screwed in a second threaded hole of the connector, a middle-diameter shaft of the connector and the three-step connecting shaft is in sliding fit with a third central hole of an end plate of a circular sleeve of the connecting sleeve with the three-step outer diameter, a second pressure spring is sleeved on the connector and the middle-diameter shaft of the three-step connecting shaft, one end of the second pressure spring abuts against the end plate of the circular sleeve of the connecting sleeve with the three-step outer diameter, and the other end of the second pressure spring abuts against a step surface of the large-diameter shaft of the three-step connecting shaft so as to lock the relative positions of the side plate and the vertical plate; the cross section of the central hole of the round outer sleeve is a regular hexagonal hole matched with a regular hexagonal sleeve of the connecting sleeve with the outer diameter of three steps, the inner end face of the round outer sleeve is provided with a concave step face which overcomes the spring force, axially separates from the outer end of the regular hexagonal sleeve and rotates for a preset angle and then is pressed against the outer end of the regular hexagonal sleeve under the spring action force of the second pressure spring, so that the large-diameter shaft of the three-step connecting shaft is axially retracted into the inner end face of the connecting sleeve with the outer diameter of three steps to be unlocked.