CN113926142B - Exercise bicycle seat with front and rear position adjusting structure - Google Patents

Abstract

The invention discloses an exercise bike seat with a front-back position adjusting structure, which comprises a seat plate supporting frame, wherein two sleeves of the seat plate supporting frame are respectively matched with a sliding rod in a sliding mode, a seat plate and a supporting plate assembly of a backrest are fixedly connected onto the two sliding rods, one side of the supporting plate assembly is provided with a long strip-shaped shifting plate which is used for being shifted by a hand to slide up and down, one end of a lever structure is movably hung on the long strip-shaped shifting plate, the long strip-shaped shifting plate can slide along the length direction relative to the end of the lever structure, the middle of the lever structure is hinged onto the seat plate supporting frame, the top of the other end of the lever structure is provided with a bolt which is pressed upwards in a jack of the supporting plate assembly by the spring force of a torsion spring, and the supporting plate is provided with a plurality of jacks along the length direction. This body-building car seat has increased the application of force that the bedplate back-and-forth movement was adjusted the stroke, was trampled when being convenient for body-building and has improved the comfort level of trampling when body-building and improve suitability and travelling comfort when official working, study.

Description

Exercise bicycle seat with front and rear position adjusting structure

Technical Field

The invention relates to the technical field of fitness equipment, in particular to a seat of a fitness bicycle with a front-back position adjusting structure.

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 different structures, and the exercise bicycle seat with the front-back position adjusting structure in the prior art has various types and long structures. However, in the actual use process, the exercise bicycle seat with the front-back position adjusting structure in the prior art still has the following defects: 1. the adjustment stroke of the seat plate moving back and forth is not enough, the force application force and comfort degree of treading during body building are directly influenced, and the applicability and comfort degree of the chair used as an office chair, a study chair or other daily chairs are also influenced. 2. The locking force of the locking or unlocking structure is still insufficient, and there is room for improvement in the firmness, stability and reliability thereof. 3. 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 still insufficient during body building and as an office chair, a study chair or other daily chairs. 4. When the chair is used as an office chair, a learning chair or other daily chairs, feet are always kept not to be tight and uncomfortable.

Disclosure of Invention

The invention aims to solve the technical problem of providing an exercise bicycle seat with a front-back position adjusting structure, which can increase the back-and-forth movement adjusting stroke of a seat plate, is convenient for treading and applying force during exercise, improves the treading comfort degree during exercise and improves the applicability and comfort degree during office work.

The invention provides an exercise bicycle seat with a front-back position adjusting structure, which comprises a seat plate supporting frame arranged on a lifting upright post of an exercise bicycle body with an exercise treading device, wherein two sleeves of the seat plate supporting frame are respectively matched with a sliding rod in a sliding manner, two sliding rods are fixedly connected with a seat plate and a supporting plate component of a backrest, one side of the supporting plate component is provided with a long strip-shaped shifting plate which is used for being shifted by hand to slide up and down, one end of a lever structure is movably hung on the long strip-shaped shifting plate, the long strip-shaped shifting plate can slide along the length direction relative to the end of the lever structure, the middle of the lever structure is hinged on the seat plate supporting frame, the top of the other end of the lever structure is provided with a plug pin which is pressed upwards in a plug hole of the supporting plate component by the spring force of a torsion spring, and the supporting plate is provided with a plurality of plug holes along the length direction so that the corresponding plug holes for the plug pin to be inserted are arranged on the supporting plate when the supporting plate component moves back and forth to the front end, the middle end and back end preset positions.

After adopting the structure, the exercise bicycle seat with the front-back position adjusting structure has the following advantages: because a plurality of plug-in holes as 10 holding bolts are directly arranged on the supporting plate, and the long strip-shaped shifting plate which can slide along one end of the lever is adopted, the back-and-forth movement and adjustment stroke of the supporting plate component, the seat plate fixedly connected with the supporting plate component and the backrest are increased, the difference requirements of front-and-back adjustment of seats of users with different heights, different physical qualities, different fitness and office and study sitting habits and the like can be met, the locking and plugging limit structure, namely, the locking or unlocking structure can bear larger locking force, the function switching before treading fitness and sitting posture is better adapted, the locking or unlocking structure of the exercise bike seat is firm, stable and reliable, the force application and comfort degree of treading when the users exercise is effectively ensured, and the applicability and comfort degree when the exercise bike is used as an office chair, a study chair or other daily chairs are also effectively ensured.

Furthermore, both ends respectively have one by back lower forward tilt up and be used for the gliding sliding seat from top to bottom in the both ends that the board was dialled to rectangular shape around one side of supporting plate subassembly, have the rectangular shape of a holding in the middle of the thickness of every sliding seat to dial the board gliding spout from top to bottom, and the front end rigid coupling that the board was dialled to rectangular shape has the handle of being convenient for to operate. After the structure is adopted, the flexibility and the guidance quality of the up-and-down sliding of the strip-shaped shifting plate are better, and the mechanical property of the strip-shaped shifting plate is better when the handle is used for shifting the strip-shaped shifting plate up and down.

Furthermore, the heights of the front end and the rear end of the strip-shaped shifting plate are greater than that of the middle section, the front end and the rear end of the strip-shaped shifting plate are respectively provided with an oblique waist-shaped hole, a limiting screw transversely inserted into the oblique waist-shaped hole is screwed on the sliding seat, and the oblique waist-shaped hole slides up and down relative to the transverse limiting screw; two ends of a reset spring are respectively connected with the supporting plate component and the front end of the strip-shaped shifting plate, so that the strip-shaped shifting plate is positioned at the lower limit position under the action force of the natural extension of the reset spring. After the structure is adopted, the flexibility and the guidance quality of the vertical sliding of the strip-shaped shifting plate are further improved, the naturally-extending spring force of the reset spring limits the strip-shaped shifting plate at the lower limit position, and the bolt at the other end of the lever structure is always in a reliable splicing locking state under the acting force of the torsion spring when the support plate needs to be locked and limited after being adjusted in place.

Further, the lever structure includes the couple in the outside, the ascending groove billet of middle opening and inboard vertical rectangle steel pipe, the couple articulates on rectangular shape is dialled the board, and rectangular shape is dialled the board and can be got in touch along length direction slip relatively, the outer end of groove billet is articulated with the bottom of couple, the inner of groove billet links firmly with the bottom of the outer end of vertical rectangle steel pipe, still linked firmly a hinge sleeve on the outer end of vertical rectangle steel pipe, hinge sleeve normal running fit is on the round pin axle of locating the bedplate support frame, the bolt links firmly the top in vertical rectangle steel pipe is inner, the torsional spring registrate on the hinge sleeve, the one end and the vertical rectangle steel pipe of torsional spring link firmly, the other end and the bedplate support frame of torsional spring link firmly. After the lever structure adopts the concrete structure, the design is ingenious, the requirements of the length direction of the lever are met, the requirements of the height direction of the lever are met, the hook can be flexibly and reliably stirred at any position of the strip-shaped stirring plate between the two sliding seats conveniently to drive the lever structure to rotate around the axis of the hinge shaft, so that the bolt fixedly connected to the other end of the lever can be flexibly and reliably inserted into or separated from a certain jack, and the lever structure is firm and reliable and is convenient to manufacture and install.

Furthermore, the exercise bicycle seat with the front-back position adjusting structure further comprises a bottom cover for coating the lever structure, the bottom cover is connected with the seat plate supporting frame through a plurality of screws, and the bottom cover is provided with a notch for the lever structure to pass through and a movable cavity rotating around a pin shaft; the other end of the torsion spring is fixedly connected with the bottom cover. The bottom cover can be regarded as one part of the seat plate supporting frame, the torsion spring is directly and fixedly connected on the seat plate supporting frame, the bottom cover can also be regarded as supporting and reinforcing the seat plate supporting frame, and the torsion spring is fixedly connected on the seat plate supporting frame if the other end of the torsion spring is inserted into one hole of the bottom cover, so that the torsion spring is indirectly and fixedly connected on the seat plate supporting frame. By adopting the structure, the connection between the supporting plate component and the lifting upright post is firmer, more reliable and more stable, the normal operation of the lever structure is not hindered, the lever structure is well protected, the normal operation of the adjusting structure for the front and back positions of the seat is effectively ensured, and the service life of the exercise bicycle seat with the front and back position adjusting structure is prolonged.

Furthermore, each jack is a kidney-shaped hole extending along the width direction of the supporting plate, the jacks are arranged at equal intervals along the width bisector of the supporting plate, the jack at the frontmost end is the jack for inserting the bolt when the supporting plate is located at the frontmost end, and the jack at the rearmost end is the jack for inserting the bolt when the supporting plate is located at the rearmost end. After the structure more than adopting, the interference of jack to the bolt is littleer, it is more accurate that the bolt inserts or breaks away from respectively with a plurality of as 10 jacks, more reliable and more convenient, and when having further guaranteed that backup pad subassembly and bedplate and back are located the foremost of regulation stroke, each preset position of rearmost end and middle part, the accurate counterpoint and the firm locking reliably of bolt and jack, application of force dynamics and the comfort level of trampling when further having guaranteed the user body-building, suitability and travelling comfort when also further having guaranteed as office chair, study chair or other daily chairs.

Furthermore, a connecting seat at the lower end of the backrest is fixedly connected with a 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 supporting plate assembly through respective hinge pins, a plurality of first pressure springs are arranged in the Contraband-shaped connecting block, 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 supporting plate, so that the backrest is self-adaptive to adjust the angle of the backrest and the comfort level of a sitting posture around the two hinge pins under the force application of a person; the rear end of one side plate of the support plate component is fixedly connected with an indexing pin, and the front end of the indexing pin is inserted into a lock 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 lock hole of the vertical plate of the Contraband-shaped connecting block to unlock the side plate and the vertical plate. After adopting above structure, the firm in connection of back and backup pad subassembly is reliable, and the angle modulation structure of seat back is simple relatively, and the operation of locking or unblock is also very convenient. The angle modulation of back and the comfort level of user's position of sitting are by a plurality of when two first pressure spring self-adaptation control by user's dead weight and application of force dynamics, during the body-building with during official working or study or when as other daily chairs, the suitability and the travelling comfort of back are very outstanding and obvious, if hope that the back does not have regulatory function and when trampling like the body-building, adopt the locking function of index pin to lock the back angle, have strengthened user's good experience and have felt and obtain the sense.

Furthermore, a first through hole is formed in the rear end of one side plate of the supporting plate assembly, a connecting ring with a first threaded hole is fixedly connected in the first through hole, and an external thread of a connecting sleeve with the outer diameter of three steps of the indexing pin is sleeved in the first threaded hole of the connecting ring in a screwing mode. 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 first center hole of the circular outer sleeve is a regular hexagon hole matched with a regular hexagon sleeve of the connecting sleeve with the outer diameter of three steps, the inner end face of the circular outer sleeve is provided with a concave step face which overcomes spring force, axially separates from the outer end of the regular hexagon sleeve, rotates for a preset angle and then is propped against the outer end of the regular hexagon sleeve under the spring force of the second pressure spring, and therefore 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 specific structure, the connecting structure between the parts is reasonable, the assembly is convenient, the locking is reliable and stable, and the unlocking operation is flexible and convenient.

Furthermore, the exercise bicycle seat with the front-back position adjusting structure further comprises exercise bicycle front legs for supporting the body of the exercise bicycle, and two foot pedals serving as pedals for office chairs or other daily chairs and provided with anti-skidding structures are arranged at two ends of the horizontal supporting tubes of the exercise bicycle front legs. After the structure is adopted, the defects that feet are always placed solidly and sitting postures are uncomfortable when the exercise bicycle seat in the prior art is used as an office chair, a learning chair or other daily chairs are overcome, when the exercise bicycle seat is used as an office chair, a learning chair or other daily chairs, the feet can be placed solidly and reliably, particularly, children or users with relatively short heights can step on the feet stably, the sitting postures of the users are comfortable, the experience feeling is good, and the application range of the exercise bicycle seat is wider.

Drawings

FIG. 1 is a schematic view of the overall structure of the exercise bicycle seat of the present invention.

Fig. 2 is a schematic top view of the support plate assembly, the backrest adjustment structure, the elongated paddle and the pedal of the present invention.

Fig. 3 is a schematic view of a partially exploded structure of the back plate assembly of the present invention.

FIG. 4 is a front view of the support plate assembly, backrest adjustment structure, elongated paddle, etc. and pedal of the present invention.

Fig. 5 is a left side view of the backrest adjustment structure, the elongated paddle, etc. and the lever structure of the present invention.

Fig. 6 is a schematic diagram of a right top view of the lever structure of the present invention.

Fig. 7 is a bottom right view of the lever structure of the present invention.

Fig. 8 is a schematic front plan view of the bottom cover of the present invention.

Fig. 9 is a right top view and a partial exploded view of the coupling structure of the backrest and the supporting plate assembly according to the present invention.

Fig. 10 is a schematic structural view of the back frame and the back connecting seat in the present invention.

FIG. 11 is a schematic view of a Contraband connection block of the present invention.

Fig. 12 is a schematic structural view of the first pressure spring in the present invention.

Fig. 13 is a schematic view of the outer configuration of the index pin of the present invention.

Fig. 14 is a first exploded view of the index pin of the present invention.

Fig. 15 is a second explosion structure diagram of the index pin of the present invention.

Fig. 16 is a structural schematic diagram of a connecting sleeve with an outer diameter of a dividing pin being three steps in the invention I (an end plate of a circular sleeve is shown).

Fig. 17 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. headrest, 2, backrest, 3, handrail, 4, seat board, 5, exercise bicycle body, 6, exercise bicycle front leg, 7, universal wheel, 8, exercise treading device, 9, exercise bicycle rear leg, 10, universal wheel mounting rack, 11, support plate, 12, jack, 13, bolt, 14, pedal, 15, slide bar, 16, support plate component, 17, elongated shifting plate, 18, sliding seat, 19, antiskid structure, 20, limit screw, 21, hook, 22, return spring, 23, handle, 24, bottom cover, 25, liftable upright post, 26, oblique waist-shaped hole, 27, channel steel bar, 28, hinge sleeve, 29, torsion spring, 30, sleeve, 31, seat board support frame, 32, vertical rectangular steel pipe, 33, pin shaft, 34, lever structure, 35, notch, 36, movable cavity, 37, connecting seat, 38, hinge pin, 39, contraband font connecting block, 40, index pin, 41, external thread sleeve, 42, connecting ring, 43, first through hole, 44, first pressure spring, 45, vertical plate, 46, side plate, 47, backrest frame, 48, transverse plate, 49, lockhole, 50, second through hole, 51, stress convex column, 52, inner end face of connecting sleeve with three steps of outer diameter, 53, hand-held part, 54, round outer sleeve, 55, connecting head, 56, a second threaded hole, 57, a second pressure spring, 58, a three-step connecting shaft, 59, a large-diameter shaft, 60, a step surface of the large-diameter shaft, 61, a middle-diameter shaft, 62, a threaded column, 63, a circular sleeve, 64, a regular hexagonal sleeve, 65, a connecting sleeve with three steps in outer diameter, 66, a first central hole, 67, an inner concave step surface, 68, a second central hole, 69, an end plate, 70, a third central hole, 71 and a sliding groove.

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.

As shown in fig. 1, 3, 4 and 6.

The invention relates to an exercise bicycle seat with a front-back position adjusting structure, which comprises a seat plate supporting frame 31 arranged on a lifting upright post 25 of an exercise bicycle body 5 with an exercise treading device 8, wherein two sleeve pipes 30 of the seat plate supporting frame 31 are respectively matched with a sliding rod 15 in a sliding way, and two sliding rods 15 are fixedly connected with a supporting plate component 16, such as a seat plate 4 and a backrest 2, which are screwed by screws. The bearing plate component 16 is fixedly connected with a seat plate 4 through screws. It is understood that the seat plate assembly 16 of the seat plate 4 and the backrest 2 means both the seat plate assembly 16 of the seat plate 4 and the backrest 16 of the backrest 2. The seat board 4 is also called a seat board and can comprise a seat board connecting board and a seat cushion. The seat plate support frame 31 is also called a seat plate support frame. The seat plate connecting plate is fixedly connected with the supporting plate component 16 by screw threads, and can be screwed with the cushion by screws. The seat board connecting board can be screwed with the armrest 3 by adopting screws. The backrest 2 may include a backrest frame 47 and a backrest plate. 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 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.

As shown in fig. 2, 3, 4, 5, 6, 7 and 8.

One side of the supporting plate component 16 is provided with a long strip-shaped shifting plate 17 which is used for being shifted by hand to slide up and down, one end of a lever structure 34 is movably hung on the long strip-shaped shifting plate 17, the long strip-shaped shifting plate 17 can slide or slide along the length direction relative to the end of the lever structure 34, the middle of the lever structure 34 is hinged on the seat plate supporting frame 31, and the top of the other end of the lever structure 34 is provided with a bolt 13 which is pressed upwards in a jack 12 of a supporting plate 11 of the supporting plate component 16 by the spring force of a torsion spring 29. The support plate 11 is provided with a plurality of insertion holes 12 along the length direction, so that the corresponding insertion holes 12 for inserting the pins 13 are formed in the support plate 11 when the support plate assembly 16 moves back and forth to the preset positions of the front end, the middle part and the rear end.

The front end and the rear end of one side of the supporting plate component 16 are respectively provided with a sliding seat 18 which is inclined upwards from the rear to the front and is used for sliding the two ends of the strip-shaped shifting plate 17 up and down, a sliding groove 71 for accommodating the strip-shaped shifting plate 17 to slide up and down is arranged in the middle of the thickness of each sliding seat 18, and the front end of the strip-shaped shifting plate 17 is fixedly connected with a handle 23 convenient to operate. The elongated paddle 17 may also be referred to as a paddle or a driver.

The height of the front end and the rear end of the strip-shaped shifting plate 17 is greater than that of the middle section, the front end and the rear end are respectively provided with an oblique waist-shaped hole 26, the limiting screw 20 transversely inserted into the oblique waist-shaped hole 26 is screwed on the sliding seat 18, and the oblique waist-shaped hole 26 slides up and down relative to the transverse limiting screw 20. Two ends of a return spring 22 are respectively connected with the support plate assembly 16 and the front end of the elongated poking plate 17, so that the elongated poking plate 17 is located at the lower limit position under the action force of the return spring 22 which naturally extends. The support plate assembly 16 described herein, such as the forward end of one side plate 46 of the support plate assembly 16.

The exercise bicycle seat with the front-back position adjusting structure further comprises a bottom cover 24 covering the lever structure 34, the bottom cover 24 is connected with the seat plate supporting frame 31 through a plurality of screws, and a notch 35 allowing the lever structure 34 to penetrate through and a movable cavity 36 rotating around a pin shaft 33 are formed in the bottom cover 24.

The lever structure 34 comprises a hook 21 on the outer side, a steel groove bar 27 with an upward opening in the middle and a vertical rectangular steel pipe 32 on the inner side, the hook 21 is hung on the elongated shifting plate 17, and the elongated shifting plate 17 can slide along the length direction relative to the hook 21. The outer end of the channel steel bar 27 is hinged with the bottom of the hook 21, as shown in fig. 5, a bolt is used as a hinge pin for hinging, and a nut is axially limited. The inner end of the steel groove strip 27 is fixedly connected with the bottom of the outer end of the vertical rectangular steel pipe 32 in a welded mode, the outer end of the vertical rectangular steel pipe 32 is further fixedly connected with a hinge sleeve 28, the hinge sleeve 28 is rotatably matched with a pin shaft 33 arranged on the seat plate support frame 31, the bolt 13 is fixedly connected with the top of the inner end of the vertical rectangular steel pipe 32, the torsion spring 29 is sleeved on the hinge sleeve 28, one end of the torsion spring 29 is fixedly connected with the vertical rectangular steel pipe 32 in an inserted mode into a through hole of the vertical rectangular steel pipe 32 in one end, the other end of the torsion spring 29 is fixedly connected with the seat plate support frame 31 in another end, the other end of the torsion spring 29 is fixedly connected with the bottom cover 24 in another end, and the other end of the torsion spring 29 is inserted into a through hole of the bottom cover 24 in another end. It is understood that the other end of the torsion spring 29 is directly connected to the seat plate support 31 if the bottom cover 24 is considered as a part of the seat plate support 31, and the other end of the torsion spring 29 is indirectly connected to the seat plate support 31 because the bottom cover 24 is fixedly connected to the seat plate support 31 if the bottom cover 24 is considered as a separate component. The hinge sleeve 28 may also be referred to as a pin sleeve.

Each of the insertion holes 12 is a kidney-shaped hole extending along the width direction of the support plate 11, and a plurality of, for example, 10 insertion holes 12 are arranged at equal intervals along the width bisector of the support plate 11, the insertion hole 12 at the frontmost end is the insertion hole 12 through which the plug 13 is inserted when the support plate 11 is located at the frontmost end, and the insertion hole 12 at the rearmost end is the insertion hole 12 through which the plug 13 is inserted when the support plate 11 is located at the rearmost end.

As shown in fig. 9, 10, 11, 12, 13, 14, 15, 16, and 17.

The connecting base 37 at the lower end of the backrest 2, specifically the lower end of the backrest frame 47, is fixedly connected, for example, two vertical plates 45 of a Contraband-shaped connecting block 39 with an upward opening, contraband-shaped connecting block 39 are screwed with a plurality of screws, and the rear ends of the two side plates 46 of the supporting plate component 16 are hinged through respective hinge pins 38. That is, one vertical plate 45 of the Contraband-shaped connecting block 39 is hinged to the rear end of one side plate 46 of the supporting plate assembly 16 through a hinge pin 38, and the other vertical plate 45 of the Contraband-shaped connecting block 39 is hinged to the rear end of the other side plate 46 of the supporting plate assembly 16 through another hinge pin 38. The specific structure of the hinge joint can be that the rear ends of the respective side plates 46 are fixedly connected, for example, the hinge pins 38 are welded with each other after passing through the through holes at the rear ends of the side plates 46, the front ends of the hinge pins 38 are hinged or rotatably connected with the second through holes 50 on the two vertical plates 45 of the Contraband-shaped connecting block 39, that is, the front end of one hinge pin 38 is rotatably connected or rotatably hinged with the second through hole 50 on one vertical plate 45 of the Contraband-shaped connecting block 39, and the front end of the other hinge pin 38 is rotatably connected or rotatably hinged with the second through hole 50 on the other vertical plate 45 of the Contraband-shaped connecting block 39. In the Contraband-shaped connecting block 39, there are a plurality of first compression springs 44, for example, two ends of each first compression spring 44 respectively abut against the transverse plate 48 of the Contraband-shaped connecting block 39 and the bottom surface of the rear end of the supporting plate 11, so that the backrest 2 can adaptively adjust the angle of the backrest 2 and the sitting comfort of the sitting posture around the two hinge pins 38 under the force of a person. The top of the first pressure spring 44 can be welded with an axially upward stress convex column 51, so that the self-adaptive adjustment is more sensitive and reliable. An indexing pin 40 is fixedly connected to the rear end of one side plate 46 of the support plate assembly 16, and the front end of the indexing pin 40 is inserted into a locking hole 49 of a vertical plate 45 of the Contraband-shaped connecting block 39 to lock the relative positions of the side plate 46 and the vertical plate 45, or is separated from the locking hole 49 of a vertical plate 45 of the Contraband-shaped connecting block 39 to unlock the side plate 46 and the vertical plate 45, so that the side plate 46 can rotate relative to each other around the hinge pin 38. The first compression spring 44 may be one, but is preferably plural, such as two or three.

The specific structure of the side plate 46 fixedly connecting with the index pin 40 may be that the rear end of the side plate 46 of the supporting plate assembly 16 is provided with a first through hole 43, a connecting ring 42 with a first threaded hole (not labeled in the figure) is fixedly connected in the first through hole 43, for example, by welding or adhesive or by screwing, and the external thread sleeve 41 of the connecting sleeve 65 with three steps in external diameter of the index pin 40 is screwed in the first threaded hole of the connecting ring 42.

A connecting head 55 with a second threaded hole 56 is axially fixedly connected in a first central hole 66 of a round outer sleeve 54 with a handheld part 53 of the index pin 40, a large-diameter shaft 59 of a three-step connecting shaft 58 is slidably sleeved in a second central hole 68 of a connecting sleeve 65 with a three-step outer diameter, a small-diameter threaded column 62 of the three-step connecting shaft 58 is screwed in the second threaded hole 56 of the connecting head 55, the connecting head 55 and a middle-diameter shaft 61 of the three-step connecting shaft 58 are in sliding fit with a third central hole 70 of an end plate 69 of a round sleeve 63 of the connecting sleeve 65 with a three-step outer diameter, a second pressure spring 57 is sleeved on the connecting head 55 and the middle-diameter shaft 61 of the three-step connecting shaft 58, one end of the second pressure spring 57 is abutted against an end plate 69 of the round sleeve 63 of the connecting shaft 65 with a three-step outer diameter, and the other end of the second pressure spring 57 is abutted against a step surface 60 of the large-diameter shaft of the three-step connecting shaft 58 so as to lock the relative position of the side plate 46 and the vertical plate 45; the cross section of the first central hole 66 of the round outer sleeve 54 is a regular hexagonal hole matched with the regular hexagonal sleeve 64 of the connecting sleeve 65 with the outer diameter of three steps, the inner end face of the round outer sleeve 54 is provided with an inner concave step surface 67 which overcomes the spring force, axially separates from the outer end of the regular hexagonal sleeve 64 and is pressed against the outer end of the regular hexagonal sleeve 64 under the spring action of the second pressure spring 57 after rotating for a preset angle, so that the large-diameter shaft 59 of the three-step connecting shaft 58 is axially retracted into the inner end face of the connecting sleeve with the outer diameter of three steps to be unlocked. It will be understood that six concave steps 67 are provided, corresponding to the six corners of the regular hexagonal sleeve 64. The small diameter threaded post 62 may also be referred to directly as the threaded post 62.

The specific structure of the first central hole 66 having the connector 55 axially and fixedly connected thereto may be that a through hole may be formed in the center of the first central hole 66, i.e., the center of the arched plate of the handheld portion 53, and the connector 55 is fixedly connected to the through hole, for example, the connector 55 may be in interference fit with the through hole, and may be screwed, and the connector 55 and the handheld portion 53 may be axially limited by an adhesive. A pair of transverse grooves may also be provided on the outer circumference of the connector 55, which are engaged in a pair of radial flanges in the through-hole to axially limit the connector 55 and the hand-held portion 53.

As shown in fig. 1, 2, 3, 4, 5, 6, 7 and 9.

The exercise bicycle seat with the front-back position adjusting structure further comprises exercise bicycle front legs 6 for supporting the exercise bicycle body 5. Two ends of the horizontal supporting tube of the front leg 6 of the exercise bicycle are provided with two foot pedals 14 which are used as feet for office chairs or other daily chairs and are provided with anti-skid structures 19 such as a plurality of convex strips which are arranged in parallel and upwards. The foot plate 14 may be attached to the top of the caster mount 10. The foot plate 14 may also be referred to as a foot pedal.

When the front and back positions of the supporting plate assembly 16, the seat plate 4 and the backrest 2 are adjusted, the handle 23 is held to drive the strip-shaped shifting plate 17 to slide upwards against the spring force of the return spring 22, the hook 21 drives the channel steel bar 27 and the vertical rectangular steel tube 32 to rotate around the pin 33, and overcomes the spring force of the torsion spring 29, so that the pin 13 fixedly connected to the top of the inner end of the vertical rectangular steel tube 32 is downwards separated from the jack 12, at the moment, the handle 23 is held to drive the supporting plate assembly 16, the seat plate 4, the backrest 2 and the two slide bars 15 to move forwards or backwards relative to the two sleeves 30 of the seat plate supporting frame 31, then the handle 23 is loosened, under the spring action force of the return spring 22 and the torsion spring 29, the strip-shaped shifting plate 17, the hook 21, the channel steel bar 27 and the vertical rectangular steel tube 32 are driven to reset around the pin 33, at the moment, the pin 13 fixedly connected to the top of the inner end of the vertical rectangular steel tube 32 is upwards inserted into the jack 12 at a certain preset position, so that the supporting plate assembly 16 is limited relative to the seat plate supporting frame 31 and used as an office chair, a study chair or other daily chairs.

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 without departing from the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides an exercise bicycle seat with front and back position control structure, includes the installation and steps on the bedplate support frame on the liftable stand of the exercise bicycle automobile body of device in the area body-building, and sliding fit has a slide bar separately in two sleeves of bedplate support frame, links firmly the supporting plate subassembly of a bedplate and back on two slide bars, its characterized in that: one side of backup pad subassembly has one to be used for the hand to dial the board with gliding rectangular shape from top to bottom, the one end activity articulate on rectangular shape is dialled the board, and the rectangular shape is dialled the board and can be slided along length direction relatively this end of lever structure, the centre of lever structure articulates on the bedplate support frame, there is one at the top of the other end of lever structure and is upwards compressed tightly the bolt in a jack of the backup pad of backup pad subassembly by the spring force of torsional spring, be equipped with a plurality of jacks along length direction in the backup pad, so that backup pad subassembly back-and-forth movement to front end, all have the corresponding jack that supplies bolt male in the backup pad when middle and rear end preset position.

2. The exercise bike seat having a fore-aft position adjustment structure as claimed in claim 1, wherein: the front end and the back end of one side of the supporting plate component are respectively provided with a sliding seat which is inclined forwards from bottom to top and is used for sliding up and down at the two ends of the strip-shaped shifting plate, a sliding groove for accommodating the strip-shaped shifting plate to slide up and down is arranged in the middle of the thickness of each sliding seat, and the front end of the strip-shaped shifting plate is fixedly connected with a handle convenient to operate.

3. The exercise bike seat having the front-rear position adjustment structure as claimed in claim 2, wherein: the height of the front end and the rear end of the strip-shaped shifting plate is greater than that of the middle section, the front end and the rear end are respectively provided with an oblique waist-shaped hole, the limiting screw transversely inserted into the oblique waist-shaped hole is screwed on the sliding seat, and the oblique waist-shaped hole slides up and down relative to the transverse limiting screw; two ends of a reset spring are respectively connected with the supporting plate component and the front end of the strip-shaped shifting plate, so that the strip-shaped shifting plate is positioned at the lower limit position under the action force of the natural extension of the reset spring.

4. The exercise bike seat having the front-rear position adjustment structure as claimed in claim 1, wherein: the lever structure includes the couple in the outside, the ascending groove billet of middle opening and the vertical rectangle steel pipe of inboard, and the couple articulates on rectangular shape is dialled the board, and rectangular shape is dialled the board and can be got in touch along length direction relatively and slide, and the outer end of groove billet is articulated with the bottom of couple, and the inner of groove billet links firmly with the bottom of the outer end of vertical rectangle steel pipe, has still linked firmly a hinge sleeve on the outer end of vertical rectangle steel pipe, and hinge sleeve normal running fit is at the round pin epaxial of locating the bedplate support frame, and the bolt links firmly at the inner top of vertical rectangle steel pipe, the torsional spring registrate on the hinge sleeve, the one end and the vertical rectangle steel pipe of torsional spring link firmly, the other end and the bedplate support frame of torsional spring link firmly.

5. An exercise bike seat having a fore-aft position adjustment structure according to claim 4, wherein: the bottom cover is connected with the seat plate supporting frame through a plurality of screws, and a gap for the lever structure to pass through and a movable cavity rotating around a pin shaft are arranged on the bottom cover; the other end of the torsion spring is fixedly connected with the bottom cover.

6. The exercise bike seat having a fore-aft position adjustment structure as claimed in claim 1, wherein: every jack is the waist shape hole that extends along backup pad width direction, and a plurality of jacks are arranged along the width bisector equidistance of backup pad, and the jack of foremost supplies bolt male jack when being located foremost for the backup pad, and the jack of rearmost end supplies bolt male jack when being located rearmost for the backup pad.

7. The exercise bike seat having a fore-aft position adjustment structure as claimed in claim 1, wherein: the connecting seat at the lower end of the backrest is fixedly connected with a 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 supporting plate assembly through respective hinge pins, a plurality of first pressure springs are arranged in the Contraband-shaped connecting block, and two ends of each first pressure spring respectively abut against the transverse plate of the Contraband-shaped connecting block and the bottom surface of the rear end of the supporting plate, so that the backrest can adaptively adjust the backrest angle and the sitting comfort around the two hinge pins under the force application of a person; the rear end of one side plate of the support plate component is fixedly connected with an indexing pin, and the front end of the indexing pin is inserted into a lock 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 lock hole of a vertical plate of the Contraband-shaped connecting block to unlock the side plate and the vertical plate.

8. An exercise bike seat having a fore-aft position adjustment structure as claimed in claim 7, wherein: the rear end of one side plate of the supporting plate component is provided with a first through hole, a connecting ring with a first threaded hole is fixedly connected in the first through hole, and the external thread of the connecting sleeve with the outer diameter of three steps of the indexing pin is sleeved in the first threaded hole of the connecting ring in a screwing mode.

9. The exercise bike seat having the front-rear position adjustment structure as claimed in claim 8, 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.

10. The exercise bike seat having a fore-aft position adjustment structure as claimed in claim 1, wherein: the exercise bicycle further comprises exercise bicycle front legs for supporting the exercise bicycle body, and two end parts of the horizontal supporting tube of the exercise bicycle front legs are provided with two foot pedals which are used as feet for office chairs or other daily chairs and are provided with anti-skidding structures.

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