Seat cushion lifting, locking and adjusting structure of exercise bicycle

Abstract

The utility model discloses a cushion lifting, locking and adjusting structure of an exercise bicycle. The cushion lifting, locking and adjusting structure comprises a cushion, a fixed sleeve, a movable sleeve, a plug pin seat, a plug pin assembly and a driving handle. The fixed sleeve is arranged on a frame of the spinning, the movable sleeve is movably inserted into the fixed sleeve, the cushion is installed on the movable sleeve, and a plurality of insertion holes are formed in one side wall of the movable sleeve; a mounting hole is formed in the side wall, corresponding to the inserting hole, of the fixing sleeve, the inner end of the bolt seat is inserted and fixed in the mounting hole, the bolt assembly movably penetrates through the bolt seat, the inner end of the bolt assembly is an inserting end matched with the inserting hole, a pushing part is arranged on the outer side of the inserting end, and the diameter of the pushing part is larger than that of the inserting hole; the driving handle is pivoted with the bolt seat, the outer end of the bolt assembly is connected with the driving handle, the inserting end can be driven to be inserted into the inserting hole by rotating the driving handle, the pushing part pushes the movable sleeve to be in pressing fit with the fixed sleeve, the operation of adjusting the height of the cushion is simple and convenient, and the cushion can be prevented from shaking.

Description

Technical Field

[0001] The utility model belongs to the technical field of fitness equipment, and in particular relates to a seat lifting and locking adjustment structure of a fitness bike. Background Art

[0002] At present, there are many kinds of fitness programs, among which spinning is a high-intensity fitness program that can improve cardiopulmonary function, help lose weight, strengthen leg muscles and improve overall physical fitness. In the process of riding an spinning bike, it is very important to find a comfortable riding posture that suits you. The height of the seat is the most important part of the bicycle setting, especially closely related to knee injuries and pedaling force. If the seat is too high, the knees are prone to injury, and a high center of gravity can easily cause accidents; if it is too low, the pedals cannot exert enough force, and long-term pedaling with an incorrect posture will also have a bad effect on the knees and legs.

[0003] The seat adjustment mechanism of traditional spinning bikes mostly uses a latch mechanism, comprising a fixed sleeve fixed to the spinning bike frame and a movable sleeve inserted into the fixed sleeve. The seat is mounted on the movable sleeve, and a removable latch is inserted into the fixed sleeve. The movable sleeve has a row of sockets corresponding to the latch. After the latch is removed, the movable sleeve can be adjusted up and down. When the height is appropriate, the latch is inserted into a socket in the fixed sleeve. Although this structure can adjust the seat height and lock the seat at a certain height, the movable sleeve needs to be flexibly inserted into the fixed sleeve. The cross-sectional area of ​​the insertion space inside the fixed sleeve is necessarily larger than that of the movable sleeve. As a result, after the latch is inserted into the socket, the seat is positioned at a certain height, but not completely fixed in place. During riding, as the body sways, the movable sleeve is prone to rocking back and forth along the axis of the latch, resulting in an unstable seat and affecting the riding experience. In addition, in the existing seat cushion adjustment structure using a latch, the structure for installing the latch is complicated, and the operation of pulling out and inserting the latch to lock it is also relatively complicated, making the adjustment inconvenient. Utility Model Content

[0004] The utility model aims to provide a seat cushion lifting and locking adjustment structure for an exercise bike, which is simple and convenient to operate to adjust the seat cushion height and can prevent the seat cushion from shaking.

[0005] To achieve the above-mentioned purpose, the solution of the present invention is: a seat lifting and locking adjustment structure for an exercise bike, comprising a seat, a fixed sleeve, a movable sleeve, a latch seat, a latch assembly, and a driving handle;

[0006] The fixed sleeve is arranged on the frame of the spinning bike, the movable sleeve is movably inserted into the fixed sleeve, the seat cushion is mounted on the movable sleeve, and a plurality of insertion holes are provided on one side wall of the movable sleeve;

[0007] A mounting hole is provided on one side wall of the fixed sleeve corresponding to the socket, the inner end of the latch seat is plugged and fixed in the mounting hole, the latch assembly is movably arranged in the latch seat, the inner end of the latch assembly is a plug end that cooperates with the socket, and a push portion is provided on the outer side of the plug end, the diameter of the push portion is larger than the diameter of the socket;

[0008] The driving handle is pivotally connected to the latch seat, and the outer end of the latch assembly is connected to the driving handle. The driving handle is rotated to make the latch assembly move back and forth in the latch seat, so that the plug end of the latch assembly exits the socket, or the plug end is inserted into the socket, and the pushing part pushes the movable sleeve to press the fixed sleeve into fit.

[0009] Furthermore, the driving handle includes a driving portion and a positioning portion, one end of the positioning portion is pivotally connected to the outer end of the latch seat to form a pivot end, and the other end of the positioning portion is provided with an arc-shaped clearance groove, and the distance between the arc-shaped clearance groove and the pivot end gradually increases from one end of the arc-shaped clearance groove to the other end; a limiting member is vertically connected to the latch assembly, and the limiting member is limited in the arc-shaped clearance groove;

[0010] The swing driving part rotates the positioning part, thereby causing the limiting part to move back and forth in the arc-shaped clearance groove, and the latch assembly is driven by the limiting part to move back and forth in the latch seat; when the limiting part moves to one end of the clearance groove, the plug-in end of the latch assembly is disengaged from the socket; when the limiting part moves to the middle of the arc-shaped clearance groove, the plug-in end of the latch assembly is inserted into the socket; when the limiting part moves to the other end of the arc-shaped clearance groove, the pushing part pushes the movable sleeve to press the fixed sleeve into fit.

[0011] Furthermore, a clearance channel for making way for the limiting member is axially opened on the side wall of the latch seat.

[0012] Furthermore, a washer is sleeved on the outer periphery of the limiting member, and the washer is fitted in the arc-shaped clearance groove.

[0013] Furthermore, the positioning portion of the driving handle includes two positioning pieces, which are respectively located on both sides of the latch seat, and one end of the two positioning pieces is pivotally connected to the two sides of the latch seat as pivotal ends, and the other ends of the two positioning pieces are provided with arc-shaped give way grooves, and two give way channels and limit members are correspondingly provided, and the two give way channels are respectively arranged on the two side walls of the latch seat.

[0014] Furthermore, the pin assembly includes an inner rod, an outer tube, a plug-in block, a limit block and a spring. The outer tube is sleeved on the outer periphery of the middle part of the inner rod and is threadedly connected to the inner rod. The outer tube is vertically connected to the limit piece. The inner end of the plug-in block is the plug-in end, and the outer end of the plug-in block is the pushing part, which is fixed to the inner end of the inner rod. The outer end of the inner rod is connected to the limit block, and the limit block is limitedly matched with the outer end of the pin seat to prevent the inner rod from falling out of the pin seat, and the spring abuts between the outer tube and the limit block.

[0015] Furthermore, the movable sleeve is a square tube structure, and an insertion hole is provided on the front side wall of the movable sleeve. The left and right sides of the movable sleeve are both arc-shaped side walls, and the width of the movable sleeve gradually decreases from the front to the rear side. The interior of the fixed sleeve is provided with a plug-in groove whose shape matches the movable sleeve. The pushing portion pushes the front side wall of the movable sleeve so that the rear side wall of the movable sleeve is pressed tightly against the rear side wall of the plug-in groove. At the same time, the left and right sides of the movable sleeve are also tightly fitted with the left and right sides of the plug-in groove respectively.

[0016] Furthermore, a buffer gasket is provided on the inner side of the pushing portion.

[0017] Furthermore, a row of insertion holes is provided on the front side wall of the movable sleeve along the axial direction.

[0018] Furthermore, a gear position mark is provided on the left side wall or the right side wall of the movable sleeve.

[0019] After adopting the above solution, the beneficial effects of the utility model are:

[0020] The inner end of the latch assembly of the present invention is a plug-in end, and a push portion is provided on the outer side of the plug-in end. The diameter of the push portion is larger than the diameter of the insertion hole. Therefore, when locking the seat cushion, it is only necessary to move the latch assembly so that the plug-in end is inserted into the insertion hole. Then, the latch assembly is further inserted, and the push portion pushes the movable sleeve until the movable sleeve is pressed against the fixed sleeve, so that the movable sleeve is clamped between the fixed sleeve and the push portion. The seat cushion will not rock back and forth along the axis of the latch assembly, ensuring the stability of the seat cushion during riding. In addition, the present invention is also provided with a drive handle for driving the latch assembly to move. Turning the drive handle can drive the latch assembly to move back and forth, making it simple and convenient to adjust the seat cushion height. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of the utility model seat installed on a spinning bike;

[0022] Figure 2 This is a structural diagram of the utility model in which the plug end is removed from the socket;

[0023] Figure 3 This is a cross-sectional view of the utility model in a state where the plug end is removed from the socket;

[0024] Figure 4 This is an exploded view of the parts of the present utility model;

[0025] Figure 5 This is an exploded view of the parts of the hidden movable sleeve and the fixed sleeve of the utility model;

[0026] Figure 6 This is a structural diagram of the utility model in which the plug end is inserted into the socket but not locked;

[0027] Figure 7 This is a cross-sectional view of the utility model in which the plug end is inserted into the socket but not locked;

[0028] Figure 8 This is a cross-sectional view of the cooperation between the limiter, the arc-shaped clearance groove and the latch assembly of the utility model;

[0029] Figure 9 This is a schematic diagram of the structure of the utility model in a locked state;

[0030] Figure 10 It is a cross-sectional view of the utility model in a locked state;

[0031] Figure 11 for Figure 10 A partial enlarged view of the middle part;

[0032] Figure 12 It is a structural diagram of the movable sleeve of the utility model.

[0033] Description of labels:

[0034] 1. Seat cushion; 2. Fixed sleeve; 21. Mounting hole; 22. Plug-in slot; 3. Movable sleeve; 31. Plug-in hole; 32. Gear position indicator; 4. Latch seat; 41. Clearance channel; 5. Latch assembly; 51. Inner rod; 52. Outer tube; 53. Plug-in block; 531. Plug-in end; 532. Pushing part; 54. Limit block; 55. Spring; 56. Buffer gasket; 6. Driving handle; 61. Driving part; 62. Positioning part; 621. Pivot end; 622. Arc-shaped clearing slot; 7. Frame; 8. Limiting piece; 81. Washer; 82. Screw. DETAILED DESCRIPTION

[0035] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] like Figure 1-12As shown, the utility model provides a seat lifting and locking adjustment structure for an exercise bike, comprising a seat 1, a fixed sleeve 2, a movable sleeve 3, a latch seat 4, a latch assembly 5, and a driving handle 6; the fixed sleeve 2 is fixedly arranged on a frame 7 of the exercise bike, the movable sleeve 3 is movably inserted into the fixed sleeve 2, the seat 1 is installed on the movable sleeve 3, specifically, it can be installed on the top of the movable sleeve 3, the middle and bottom of the movable sleeve 3 are movably inserted into the fixed sleeve 2, a plurality of sockets 31 are provided on one side wall of the movable sleeve 3, which are used to cooperate with the latch assembly 5 to fix the seat 1 at a height, the socket 31 can be only one, or a plurality of sockets 31 can be axially arranged to form a row, and the height adjustment of the seat 1 can be achieved by providing a plurality of sockets 31.

[0037] A mounting hole 21 is provided on one side wall of the fixed sleeve 2 corresponding to the socket 31, and the inner end of the latch seat 4 is plugged and fixed in the mounting hole 21. The latch assembly 5 is movably inserted into the latch seat 4, and the inner end of the latch assembly 5 is a plug-in end 531 that cooperates with the socket 31. A pushing portion 532 is provided on the outer side of the plug-in end 531. The diameter of the pushing portion 532 is larger than the diameter of the socket 31, so that the pushing portion 532 can push the movable sleeve 3, so that the movable sleeve 3 is pressed and fixed to the fixed sleeve 2.

[0038] The driving handle 6 is pivotally connected to the latch seat 4, and the outer end of the latch assembly 5 is connected to the driving handle 6. Rotating the driving handle 6 can drive the latch assembly 5 to move back and forth in the latch seat 4, so that the plug end 531 of the latch assembly 5 exits the socket 31. Figure 3 As shown, at this time, the movable sleeve 3 is unlocked, and the movable sleeve 3 can move up and down relative to the fixed sleeve 2 to achieve height adjustment of the seat cushion 1; the plug end 531 can also be inserted into the socket 31, and the pushing portion 532 pushes the movable sleeve 3 to press and fit with the fixed sleeve 2, as shown in FIG. Figure 10-11 As shown, at this time, the plug end 531 cooperates with the socket 31 to limit the seat cushion 1 to a certain height, and restricts the radial reciprocating movement of the seat cushion 1 along the plug assembly, and the pushing portion 532 pushes the movable sleeve 3 so that the movable sleeve 3 presses the fixed sleeve 2. The movable sleeve 3 is clamped between the fixed sleeve 2 and the pushing portion 532, and the seat cushion 1 will not rock back and forth along the axis direction of the latch assembly 5, ensuring the stability of the seat cushion 1 during riding. In addition, the utility model is also provided with a driving handle 6 for driving the latch assembly 5 to move. Rotating the driving handle 6 can drive the latch assembly 5 to move back and forth, making the operation of adjusting the height of the seat cushion 1 simple and convenient. In addition, as Figure 1 As shown, the lifting and locking adjustment structure of the present invention can be arranged on the rear side of the frame 7 to adjust the height of the seat cushion 1, and can also be arranged on the front side of the frame 7 to adjust the height of the armrest.

[0039] Key references Figure 2-11The driving handle 6 includes a driving portion 61 and a positioning portion 62. One end of the positioning portion 62 is pivotally connected to the outer end of the latch seat 4 to form a pivot end 621. The other end of the positioning portion 62 is provided with an arc-shaped clearance groove 622. The distance between the arc-shaped clearance groove 622 and the pivot end 621 gradually increases from one end of the arc-shaped clearance groove 622 to the other end. A limiting member 8 is vertically connected to the latch assembly 5. The limiting member 8 is limited in the arc-shaped clearance groove 622. The swinging driving portion 61 can rotate the positioning portion 62 to position the latch. When the part 62 rotates, the arc-shaped give way groove rotates with the positioning part 62, and the limiting member 8 can only move axially with the latch assembly 5, and cooperate with the rotation of the arc-shaped give way groove, so that the limiting member 8 will move in the arc-shaped give way groove; when the limiting member 8 is at different positions in the arc-shaped give way groove, the distance between the limiting member 8 and the pivot end 621 is different, and the pivot end 621 is fixed. While moving in the arc-shaped give way groove 622, the limiting member 8 can drive the latch assembly 5 to move axially, thereby realizing the use of the driving handle 6 to drive the latch assembly 5 to move.

[0040] As a preferred embodiment, the arc and length of the arc-shaped relief groove 622 are set to be able to achieve three states of adjustment, such as Figure 2-3 As shown, when the limiting member 8 moves to one end of the arc-shaped clearance groove 622, the plug end 531 of the latch assembly 5 is disengaged from the socket 31, and is now in an unlocked state, and the movable sleeve 3 can be raised and lowered to adjust the height of the seat cushion 1; Figure 6-7 As shown, when the limiting member 8 moves to the middle of the arc-shaped clearance groove 622, the plug end 531 of the latch assembly 5 is inserted into the insertion hole 31, but the pushing portion 532 has not yet pushed the movable sleeve 3. At this time, although the movable sleeve 3 cannot move up and down, it can move along the axial direction of the latch assembly 5; Figure 9-11 As shown, when the stopper 8 moves to the other end of the arcuate clearance groove 622, the pushing portion 532 pushes the movable sleeve 3 and the fixed sleeve 2 into a tight fit. At this point, the movable sleeve 3 is clamped between the fixed sleeve 2 and the pushing portion 532. The seat cushion 1 will not move up and down, nor will it rock back and forth along the axis of the latch assembly 5. The seat cushion 1 is completely locked and in a locked state. Furthermore, the curvature of the arcuate clearance groove 622 allows the stopper 8 to be positioned at both ends of the arcuate clearance groove 622 without external force, maintaining the seat cushion 1 in both the unlocked and locked states.

[0041] Furthermore, the two ends of the arc-shaped give way groove 622 are the upper end and the lower end. When the limit member 8 moves to the upper end of the arc-shaped give way groove 622, the seat cushion 1 is in an unlocked state. When the limit member 8 moves to the lower end of the arc-shaped give way groove 622, the seat cushion 1 is in a locked state. Therefore, the seat cushion 1 can be locked by holding the driving part 61 and swinging the driving handle 6 downward, and the seat cushion 1 can be unlocked by swinging the driving handle 6 upward.

[0042] Key references Figure 2 、 Figure 5 and Figure 8 A clearance channel 41 is axially opened on the side wall of the latch seat 4 to make way for the stopper 8. One end of the stopper 8 can be inserted into the latch seat 4 through the clearance channel 41 and fixed to the latch assembly 5. A washer 81 is sleeved on the outer periphery of the other end of the stopper 8. The washer 81 fits within the arc-shaped clearance groove 622. The washer 81 can be made of rubber to reduce wear and allow smooth movement within the arc-shaped clearance groove 622. The washer 81 can be fixed by a screw 82. The stopper 8 can be a rod-shaped structure with a threaded hole provided inside the other end of the stopper 8. The screw 82 passes through the washer 81 and is screwed into the threaded hole to fix the washer 81.

[0043] Key references Figure 2 and Figure 5 The positioning portion 62 of the driving handle 6 includes two positioning pieces, which are respectively located on both sides of the latch seat 4, and one end of the two positioning pieces is pivotally connected to the two sides of the latch seat 4 as pivotal ends 621, and the other ends of the two positioning pieces are provided with arc-shaped makeshift grooves 622, so that there are two makeshift channels 41 and the limiting member 8 respectively, and the two makeshift channels 41 are respectively arranged on the two side walls of the latch seat 4. The two symmetrically arranged positioning piece structures make the structure of the positioning portion 62 more stable, and can stably drive the latch assembly 5 to move.

[0044] Key references Figure 5 and Figure 11The latch assembly 5 includes an inner rod 51, an outer tube 52, a plug block 53, a limit block 54 and a spring 55. The outer tube 52 is sleeved on the outer periphery of the middle part of the inner rod 51 and is threadedly connected to the inner rod 51. The outer tube 52 is vertically connected to the limit member 8. The limit member 8 drives the outer tube 52 to move, and the inner rod 51 moves with the outer tube 52; the inner end of the plug block 53 is the plug end 531, and the outer end of the plug block 53 is the push portion 532. The push portion 532 is fixed to the inner end of the inner rod 51. Specifically, the inner end of the inner rod 51 can be inserted into the push portion 532, and then the inner rod 51 and the push portion 532 are connected by a key pin; the outer end of the inner rod 51 is connected to the limit The stop block 54 cooperates with the outer end of the latch seat 4 to prevent the latch assembly 5 from falling out of the latch seat 4. Specifically, a convex edge can be provided on the outer end of the stop block 54, and a step can be provided inside the outer end of the latch seat 4 to cooperate with the convex edge. The cooperation between the convex edge and the step can prevent the latch assembly 5 from falling out of the latch seat 4. The spring 55 abuts between the outer tube 52 and the stop block 54. When in the unlocked state, the spring 55 is compressed. When in the locked state, the spring 55 is stretched and reset, thereby helping the spring 55 to maintain the latch assembly 5 in the locked state of the seat cushion 1. The number of the springs 55 is not limited to one, and the location of the spring 55 is not limited to between the inner rod 51 and the stop block 54. In addition, a buffer washer 56 is provided on the inner side of the pushing portion 532. The buffer washer 56 has the function of reducing friction and slowing down the vibration of the movable sleeve 3.

[0045] Key references Figure 4 and Figure 12 , the movable sleeve 3 and the fixed sleeve 2 can be a square tube structure, the front side wall of the movable sleeve 3 is provided with a plug hole 31, the left side wall and the right side wall of the movable sleeve 3 are both arc-shaped side walls, and the width of the movable sleeve 3 gradually decreases from the front side to the rear side; the interior of the fixed sleeve 2 is provided with a plug-in slot 22 whose shape matches the movable sleeve 3, that is, the width of the rear side wall of the plug-in slot 22 is the same as the width of the rear side wall of the movable sleeve 3, the left side wall and the right side wall of the plug-in slot 22 are also arc-shaped side walls, and the width of the plug-in slot 22 also gradually decreases from the front side to the rear side, but the plug-in slot 22 The length should be greater than that of the movable sleeve 3, so that the movable sleeve 3 can move up and down in the plug-in slot 22 when in the unlocked state. In the locked state, the pushing portion 532 pushes the front side wall of the movable sleeve 3, causing the movable sleeve 3 to move backward until the rear side wall of the movable sleeve 3 is tightly fitted with the rear side wall of the plug-in slot 22. At the same time, the left and right walls of the movable sleeve 3 can also be tightly fitted with the left and right walls of the plug-in slot 22 respectively, so as to completely lock the movable sleeve 3, and the movable sleeve 3 will not move forward and backward (i.e., move along the axial direction of the latch assembly 5) or left and right.

[0046] Key references Figure 4A gear mark 32 is provided on the left side wall or the right side wall of the movable sleeve 3. The gear mark 32 can remind the user to record the seat gear that suits him / her, which is convenient for consumers to use.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the design of this case. Any equivalent changes made based on the key design of this case shall fall within the scope of protection of this case.

Claims

1. A seat lift locking adjustment structure for an exercise bike, characterized in that: It includes a seat cushion, a fixed sleeve, a movable sleeve, a latch seat, a latch assembly, and a driving handle; The fixed sleeve is arranged on the frame of the spinning bike, the movable sleeve is movably inserted into the fixed sleeve, the seat cushion is mounted on the movable sleeve, and a plurality of insertion holes are provided on one side wall of the movable sleeve; A mounting hole is provided on one side wall of the fixed sleeve corresponding to the socket, the inner end of the latch seat is plugged and fixed in the mounting hole, the latch assembly is movably arranged in the latch seat, the inner end of the latch assembly is a plug end that cooperates with the socket, and a push portion is provided on the outer side of the plug end, the diameter of the push portion is larger than the diameter of the socket; The driving handle is pivotally connected to the latch seat, and the outer end of the latch assembly is connected to the driving handle. The driving handle is rotated to make the latch assembly move back and forth in the latch seat, so that the plug end of the latch assembly exits the socket, or the plug end is inserted into the socket, and the pushing part pushes the movable sleeve to press the fixed sleeve into fit.

2. The seat lift locking adjustment structure of an exercise bike according to claim 1, characterized in that: The driving handle includes a driving portion and a positioning portion, one end of the positioning portion is pivotally connected to the outer end of the latch seat to form a pivot end, and the other end of the positioning portion is provided with an arc-shaped clearance groove, and the distance between the arc-shaped clearance groove and the pivot end gradually increases from one end of the arc-shaped clearance groove to the other end; a limiting member is vertically connected to the latch assembly, and the limiting member is limited in the arc-shaped clearance groove; The swing driving part rotates the positioning part, thereby causing the limiting part to move back and forth in the arc-shaped clearance groove, and the latch assembly is driven by the limiting part to move back and forth in the latch seat; when the limiting part moves to one end of the clearance groove, the plug-in end of the latch assembly is disengaged from the socket; when the limiting part moves to the middle of the arc-shaped clearance groove, the plug-in end of the latch assembly is inserted into the socket; when the limiting part moves to the other end of the arc-shaped clearance groove, the pushing part pushes the movable sleeve to press the fixed sleeve into fit.

3. The seat lift locking adjustment structure of an exercise bike according to claim 2, characterized in that: A making way channel for the limiting member is axially opened on the side wall of the latch seat.

4. The seat lift locking adjustment structure for an exercise bike according to claim 2 or 3, characterized in that: A washer is sleeved on the outer periphery of the limiting member, and the washer is fitted in the arc-shaped relief groove.

5. The seat lift locking adjustment structure of an exercise bike according to claim 3, characterized in that: The positioning portion of the driving handle includes two positioning pieces, which are respectively located on both sides of the latch seat, and one end of the two positioning pieces is pivotally connected to the two sides of the latch seat as pivotal ends, and the other ends of the two positioning pieces are provided with arc-shaped makeshift grooves. There are two corresponding makeshift channels and limit members, and the two makeshift channels are respectively arranged on the two side walls of the latch seat.

6. The seat lift locking adjustment structure of an exercise bike according to claim 2, characterized in that: The latch assembly includes an inner rod, an outer tube, a plug-in block, a limit block and a spring. The outer tube is sleeved on the outer periphery of the middle part of the inner rod and is threadedly connected to the inner rod. The outer tube is vertically connected to the limit piece. The inner end of the plug-in block is a plug-in end, and the outer end of the plug-in block is a push portion, which is fixed to the inner end of the inner rod. The outer end of the inner rod is connected to the limit block, and the limit block is limitedly matched with the outer end of the latch seat to prevent the inner rod from falling out of the latch seat. The spring abuts between the outer tube and the limit block.

7. The seat lift locking adjustment structure of an exercise bike according to claim 1, characterized in that: The movable sleeve is a square tube structure, and a socket is provided on the front side wall of the movable sleeve. The left and right sides of the movable sleeve are both arc-shaped side walls, and the width of the movable sleeve gradually decreases from the front to the rear side. The interior of the fixed sleeve is provided with a plug-in groove whose shape matches the movable sleeve. The pushing portion pushes the front side wall of the movable sleeve so that the rear side wall of the movable sleeve is pressed tightly against the rear side wall of the plug-in groove. At the same time, the left and right sides of the movable sleeve are also tightly fitted with the left and right sides of the plug-in groove respectively.

8. The seat lift locking adjustment structure for an exercise bike according to claim 1, characterized in that: A buffer pad is provided on the inner side of the pushing portion.

9. The seat lift locking adjustment structure of a fitness bike according to claim 1, characterized in that: A row of insertion holes is axially arranged on the front side wall of the movable sleeve.

10. The seat lift locking adjustment structure of an exercise bike according to claim 1, characterized in that: A gear mark is provided on the left side wall or the right side wall of the movable sleeve.

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