Bicycle saddle angle adjustment structure

Abstract

The utility model provides a kind of bicycle seat pad angle adjusting structure, including a seat pipe, a shaft group, a tight group, an angle adjusting group and a positioning group.The seat pipe has a tube body, a shaft body connected with the tube body and formed a fixed shaft hole, and a long slot communicated with the fixed shaft hole.The shaft group has a shaft piece combined with the fixed shaft hole of seat pipe and multiple radial positioning holes for the elastic abutment of positioning group.The tight group is used to loosen the fixed shaft hole of seat pipe, so that the shaft group can rotate freely or be fixed relative to the seat pipe.The angle adjusting group has a sliding fitting part that can displace with the long slot of seat pipe and can be locked on the seat pipe.The positioning group is arranged on the angle adjusting group and can elastically abut against each positioning hole of the shaft group.Therefore, it is beneficial to adjust the angle of seat pad.Another bicycle seat pad angle adjusting structure is provided with multiple positioning holes in the angle adjusting group, and the positioning group is arranged on the shaft group.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, and in particular to a bicycle seat angle adjustment structure. It focuses on providing a multi-stage positioning and easy-to-operate seat angle adjustment structure to facilitate seat angle adjustment and improve adjustment flexibility. Background Technology

[0002] Patent DE202004010405U1 discloses a coupling for an adjustable connection between a bicycle saddle 1 and a seatpost 2, including at least one clamp 7, 8 for engaging with the saddle, a fastener 13 for connecting the coupling and the seatpost, and a clamp operating mechanism 5 mounted on the side of the fastener. A lever 6 extends from the operating mechanism, its direction perpendicular to the direction of the connection or seatpost. The main drawback of this design is that the adjustment process still relies on the fastener for fixation; although the operation is assisted by the lever, the feel and convenience are limited; and it lacks multi-stage positioning functionality, making it difficult to achieve quick and precise adjustment of the saddle angle.

[0003] TWM669304 discloses an adjustable and detachable bicycle saddle and seatpost assembly structure. In this structure, the operable positioning element 15 is removed from the positioning hole 22 of the connector 20. Using the shaft 14 as a pivot, the bicycle saddle 40 is rotated to the desired angle. The positioning element 15 is then re-inserted into the corresponding positioning hole 22 of the connector 20 to fix the bicycle saddle 40 at the desired angle. However, this positioning method requires completely removing the positioning element from the positioning hole, making the operation cumbersome and the adjustment slow, which is not conducive to quick and convenient saddle angle adjustment. Furthermore, due to the lack of elastic elements, the positioning structure is prone to loosening due to road vibrations during riding, affecting the stability and safety of the fixation. Moreover, its adjustable angle range is too large, making it difficult to adjust to commonly used smaller angle ranges.

[0004] Existing saddle adjustment mechanisms have excessively wide adjustment angles, making it difficult to conveniently and effectively position the saddle within commonly used small angle ranges. This prevents users from quickly and stably achieving the optimal sitting posture angle. Therefore, proposing a bicycle saddle angle adjustment structure that is simple in structure, flexible in adjustment, and capable of multi-segment positioning has become a current technological requirement and challenge. Utility Model Content

[0005] The purpose of this invention is to provide a bicycle saddle angle adjustment structure that is simple in structure, flexible in operation, and capable of multi-stage precise positioning, allowing users to quickly and reliably adjust the saddle angle. Its design, combining sliding adjustment and multi-point positioning, achieves a wide range of finely detailed angle adjustments, improving the convenience and stability of the adjustment.

[0006] To achieve the above objectives, the present invention provides a bicycle seat angle adjustment structure comprising a seat tube, a shaft assembly, a tensioning assembly, an angle adjustment assembly, and a positioning assembly. The seat tube has a tube body, a mounting body connected to the tube body and forming a fixed shaft hole, and an elongated groove communicating with the fixed shaft hole. The shaft assembly has a shaft member engaging with the fixed shaft hole of the seat tube and multiple radially arranged positioning holes for the positioning assembly to elastically abut against it. The tensioning assembly is used to tighten or loosen the fixed shaft hole of the seat tube, allowing the shaft assembly to rotate freely or be fixed relative to the seat tube. The angle adjustment assembly has a sliding part that can be displaced with the elongated groove of the seat tube. The positioning assembly is disposed in the angle adjustment assembly and can elastically abut against each of the positioning holes of the shaft assembly.

[0007] The shaft assembly has multiple radial positioning holes to form a first angle range, and the angle adjustment assembly can be rotated and fixed in a second angle range. The user can quickly select the approximate seat angle range by sliding the angle adjustment assembly, and then precisely lock the specific angle by elastically pressing the positioning assembly against the positioning hole, thus achieving a composite multi-stage adjustment effect with a wide range and multi-angle positioning.

[0008] Preferably, the angle adjustment assembly has a sliding part forming the sliding part and a fastener for fixing the sliding part to the seat tube. By sliding the sliding part to the long groove of the seat tube, the angle adjustment assembly can slide smoothly and be fixed in the desired position by the fastener.

[0009] Preferably, the seat tube has an elongated hole communicating with the elongated slot, and the angle adjustment assembly has an extension that can be displaced through the elongated hole of the seat tube. The extension passes through the elongated hole and forms a stable support for the seat tube, thereby improving the smoothness of adjustment and sliding and the stability of positioning.

[0010] Preferably, the positioning assembly has a positioning bead that abuts against each of the positioning holes of the shaft assembly, and a spring that abuts against the positioning bead. The spring provides elastic force so that the positioning bead can elastically abut against the positioning hole, ensuring the accuracy and firmness of the positioning when the seat is adjusted.

[0011] Preferably, the angle adjustment group has a positioning hole, and the positioning group has a positioning body that is connected to the positioning hole of the angle adjustment group. The combination of the positioning body and the positioning hole realizes a precise multi-segment positioning function.

[0012] Preferably, the seat tube has a first connecting part and a second connecting part. The tensioning group connects the first connecting part and the second connecting part of the seat tube. Through the operation of the tensioning group, the first connecting part and the second connecting part of the seat tube are adjusted and fixed simultaneously, thereby improving the stability of the overall structure and the ease of operation.

[0013] To achieve the above objectives, this utility model provides another bicycle seat angle adjustment structure, comprising a seat tube, a shaft assembly, a tensioning assembly, an angle adjustment assembly, and a positioning assembly. The seat tube has a tube body, a mounting body connected to the tube body and forming a fixed shaft hole, and an elongated groove communicating with the fixed shaft hole. The shaft assembly has a shaft member that engages with the fixed shaft hole of the seat tube. The tensioning assembly is used to adjust the tension between the shaft member and the fixed shaft hole of the seat tube, allowing the shaft assembly to rotate freely or be fixed relative to the seat tube. The angle adjustment assembly has a sliding part that can be displaced with the elongated groove of the seat tube and is equipped with multiple radial positioning holes. The positioning assembly is disposed on the shaft assembly and can elastically abut against each of the positioning holes of the angle adjustment assembly.

[0014] The shaft assembly has multiple radial positioning holes to form a first angle range, and the angle adjustment assembly can be rotated and fixed in a second angle range. The user can quickly select the approximate seat angle range by sliding the angle adjustment assembly, and then precisely lock the specific angle by elastically pressing the positioning assembly against the positioning hole, thus achieving a composite multi-stage adjustment effect with a wide range and multi-angle positioning.

[0015] Preferably, the angle adjustment assembly has a sliding part forming the sliding part and a fastener for fixing the sliding part to the seat tube. By sliding the sliding part to the long groove of the seat tube, the angle adjustment assembly can slide smoothly and be fixed in the desired position by the fastener.

[0016] Preferably, the seat tube has an elongated hole communicating with the elongated slot, and the angle adjustment assembly has an extension that can be displaced through the elongated hole of the seat tube. The extension passes through the elongated hole and forms a stable support for the seat tube, thereby improving the smoothness of adjustment and sliding and the stability of positioning.

[0017] Preferably, the positioning assembly has a positioning bead that abuts against each of the positioning holes of the adjustment assembly, and a spring that abuts against the positioning bead. The spring provides elastic force so that the positioning bead can elastically abut against the positioning hole, ensuring the accuracy and firmness of the positioning when the seat is adjusted.

[0018] Preferably, the shaft assembly has a positioning hole, and the positioning group has a positioning body that is connected to the positioning hole of the shaft assembly. The precise multi-segment positioning function is achieved through the combination of the positioning body and the positioning hole.

[0019] Preferably, the seat tube has a first connecting part and a second connecting part. The tensioning group connects the first connecting part and the second connecting part of the seat tube. Through the operation of the tensioning group, the first connecting part and the second connecting part of the seat tube are adjusted and fixed simultaneously, thereby improving the stability of the overall structure and the ease of operation.

[0020] The detailed construction, features, assembly, and usage of the bicycle seat angle adjustment structure provided by this utility model will be described in the following embodiments. However, it should be understood that the embodiments and drawings described below are merely illustrative and should not be used to limit the scope of protection of this utility model. Attached Figure Description

[0021] Figure 1 A perspective view of a preferred embodiment of the bicycle seat angle adjustment structure of this utility model;

[0022] Figure 2 Another perspective view of a preferred embodiment of the bicycle seat angle adjustment structure of this utility model;

[0023] Figure 3 An exploded perspective view of a preferred embodiment of the bicycle seat angle adjustment structure of this utility model;

[0024] Figure 4 Another exploded perspective view of a preferred embodiment of the bicycle seat angle adjustment structure of this utility model;

[0025] Figure 5 This is a combined cross-sectional view of a preferred embodiment of the bicycle seat angle adjustment structure of the present invention, showing an operational state of an adjustment position.

[0026] Figure 6 Similar Figure 5 This displays another operation status;

[0027] Figure 7 This is a combined cross-sectional view of a preferred embodiment of the bicycle seat angle adjustment structure of the present invention, showing an operational state of another adjustment position.

[0028] Figure 8 Similar Figure 7 This displays another operation status;

[0029] Figure 9 A combined cross-sectional view of another preferred embodiment of the bicycle seat angle adjustment structure of this utility model shows the interchangeable design.

[0030] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0031] 1-Bicycle seat angle adjustment structure;

[0032] 10-Seal tube;

[0033] 11-Tube body;

[0034] 12-install the shaft body;

[0035] 121 - Fixed shaft hole;

[0036] 122-Long slot;

[0037] 123 - Elongated hole;

[0038] 13-First Company Headquarters;

[0039] 131 - First hole;

[0040] 14-Second Company;

[0041] 132 - Second hole;

[0042] 20-shaft group;

[0043] 21-Shaft;

[0044] 211 - Shaft section;

[0045] 212 - Positioning hole;

[0046] 214 - Positioning mounting hole;

[0047] 22-Fixed component;

[0048] 23- Bolt;

[0049] 24- Bolts;

[0050] 30-Tightening set;

[0051] 31-Operating component;

[0052] 32-Pivot unit;

[0053] 33-Pull rod;

[0054] 40-Angle Adjustment Group;

[0055] 41-Sliding parts;

[0056] 411-Sliding fitting department;

[0057] 412-Extension;

[0058] 413 - Positioning mounting hole;

[0059] 415 - Positioning hole;

[0060] 42-Push-up piece;

[0061] 43-Fasteners;

[0062] 50-Positioning Group;

[0063] 51-Positioning device;

[0064] 52-Positioning Bead;

[0065] 53 - Spring. Detailed Implementation

[0066] First, it should be noted that the technical features provided by this utility model are not limited to the specific structures, uses, and applications described in the embodiments. The terminology used in this description is illustrative and descriptive, and is intended to be understood by those skilled in the art. The directional terms such as "front," "upper," "lower," "rear," "left," "right," "top," "bottom," "inner," and "outer" mentioned in this specification are merely illustrative based on the normal direction of use and are not intended to limit the scope of the claims.

[0067] To illustrate the technical features of this utility model in detail, the following embodiments are provided in conjunction with the accompanying drawings:

[0068] like Figures 1 to 5 As shown, a preferred embodiment of the bicycle seat angle adjustment structure 1 provided by this utility model includes a seat tube 10, a shaft assembly 20, a tensioning assembly 30, an angle adjustment assembly 40, and a positioning assembly 50, for adjusting the seat angle.

[0069] like Figures 3 to 5 As shown, the seat tube 10 has a tube body 11, a shaft mounting body 12, a first connecting part 13, a second connecting part 14, a long groove 122, and a long hole 123. The tube body 11 is hollow. The shaft mounting body 12 has a shaft fixing hole 121 connected to the tube body 11 for fixing the shaft assembly 20. The first connecting part 13 and the second connecting part 14 are used for the tensioning assembly 30 to be loosened and tightened. The first connecting part 13 and the second connecting part 14 are respectively provided with a first hole 131 and a second hole 132. The long groove 122 is adjacent to the shaft fixing hole 121. The long groove 122 is used for the angle adjustment assembly 40 to slide. The long hole 123 communicates with the long groove 122.

[0070] like Figures 3 to 5 As shown, the shaft assembly 20 includes a shaft 21, two fixed seats 22, and two bolts 23 and 24. The shaft 21 has a shaft portion 211 and three positioning holes 212. The shaft portion 211 engages with the fixing hole 121 of the seat tube 10. The shaft portion 211 has teeth on its outer circumference. The positioning holes 212 are evenly distributed on the shaft portion 211 for positioning by the positioning assembly 50. The fixed seats 22 are respectively located on both sides of the shaft 21. The two bolts 23 and 24 pass through and connect to the fixed seats 22, and are bolted together to bring the fixed seats 22 close to the shaft 21. A fixed seat cushion can be clamped between the shaft 21 and the two fixed seats 22. The multiple radial positioning holes 212 on the shaft assembly 20 form a first angle range, which covers a smaller and more commonly used seat cushion adjustment angle range.

[0071] like Figures 3 to 5As shown, the tensioning assembly 30 is a component for adjusting the overall structural tightness. The tensioning assembly 30 includes an operating member 31, multiple pivoting units 32, and a pull rod 33. The operating member 31 is pivotally connected to the first connecting portion 13 via the first hole 131 of the seat tube 10 through the pivoting unit 32. The pivoting unit 32 includes components such as a pivot rod and a bushing. The pull rod 33 is pivotally connected to the operating member 31 via the pivoting unit 32. The pull rod 33 passes through the second hole 132 of the seat tube 10 and is connected to the second connecting portion 14. The pull rod 33 includes components such as a nut. When the operating member 31 is pulled upwards, the seat tube 10 can clamp the shaft assembly 20; when the operating member 31 is pulled downwards, the seat tube 10 can loosen the shaft assembly 20. The tensioning assembly 30 can be any other quick-release structure and method, and is not limited to what is disclosed in this utility model.

[0072] like Figures 3 to 5 As shown, the angle adjustment assembly 40 is installed on the seat tube 10. The angle adjustment assembly 40 has a sliding part 41, a pad 42, and a fastener 43. The sliding part 41 has a sliding portion 411, an extension 412, and a positioning hole 413. The sliding portion 411 is designed to slide smoothly within the elongated groove 122 of the seat tube 10. The extension 412 is connected to the sliding portion 411 and can pass through the elongated hole 123 of the seat tube 10. The outer periphery of the extension 412 is threaded. The positioning hole 413 passes through the sliding portion 411 and the extension 412. In this embodiment, the positioning hole 413 is a threaded hole. The pad 42 is fitted onto the extension 412 of the sliding part 41, reliably abutting against a portion of the seat tube 10, and can cover part or all of the elongated hole 123. In this embodiment, the fastener 43 is a nut, which is threaded to the extension 412 of the sliding part 41 by means of an internal thread, and is used to fix the sliding part 41 to the seat tube 10.

[0073] The angle adjustment assembly 40 can slide within the elongated groove 122 on the seat post 10. This sliding creates a second angle range that allows the user to adjust the overall tilt angle of the bicycle saddle, providing multiple selectable positions to set a reference for a generally used saddle angle.

[0074] like Figures 3 to 5 As shown, the positioning assembly 50 is disposed on the angle adjustment assembly 40 and includes a positioning device 51, a positioning bead 52, and a spring 53. In this embodiment, the positioning device 51 is a screw threaded into the positioning hole 413 of the angle adjustment assembly 40. The spring 53 and the positioning bead 52 are disposed within the positioning device 51. The spring 53 provides elastic force to press against the positioning bead 52, allowing the positioning bead 52 to be elastically pressed against the positioning hole 212 of the shaft member 21 of the shaft assembly 20. This structure ensures that the positioning bead 52 can press against the positioning hole 212 during adjustment, effectively preventing the seat cushion from unexpectedly sliding or falling off, and improving adjustment accuracy.

[0075] The instructions for using the bicycle seat angle adjustment structure 1 in this embodiment are as follows:

[0076] like Figure 5 As shown, the adjustment group 40 is in the middle position, as... Figure 6 After the tensioning assembly 30 is loosened, the shaft assembly 20 can rotate freely relative to the seat tube 10. The positioning bead 52 of the positioning assembly 50 can be stretched and elastically positioned in the positioning hole 212 corresponding to the shaft assembly 20, so it is easy to control its rotation at a predetermined angle.

[0077] like Figure 7 and Figure 8 As shown, after the adjustment group 40 is adjusted upward and then fixed, the positioning group 50 has rotated by an angle. Therefore, the shaft group 20 can be adjusted within a relatively inclined rotation positioning range, and the shaft group 20 does not require more positioning holes 212. Similarly, after the adjustment group 40 is adjusted downward and then fixed, the shaft group 20 can be rotated downward at a larger angle.

[0078] The operating member 31 of the tensioning assembly 30 is moved downwards to loosen the first connecting part 13 and the second connecting part 14 of the seat post 10, allowing the shaft assembly 20 to rotate freely relative to the seat post 10 to adjust its angle. At this time, the angle adjustment assembly 40 can slide within the elongated groove 122 of the seat post 10 to the desired position. After adjusting to the positioning position, the positioning bead 52 of the positioning assembly 50, under the elastic force of the spring 53, abuts against the corresponding positioning hole 212 on the shaft member 21 of the shaft assembly 20, ensuring that the seat angle is firmly positioned. Next, the operating member 31 of the tensioning assembly 30 is pulled upwards to clamp the shaft assembly 20 between the first connecting part 13 and the second connecting part 14, fixing the tightness of the seat adjustment structure and preventing the seat from loosening or sliding during riding. For fine adjustments, the user can further adjust the details using the sliding parts 41 and fasteners 43 on the angle adjustment assembly 40 to achieve the optimal riding posture, and then re-tighten the fasteners 43 to complete the fixation.

[0079] The bicycle saddle angle adjustment structure provided by this invention utilizes the elongated groove 122 on the seat post 10 to guide the smooth movement of the adjustment assembly 40. This, combined with the multiple positioning holes 212 of the axle assembly 20 and the positioning beads 52 of the positioning assembly 50, achieves multi-stage and precise positioning. The tightness of the overall structure is adjusted via the tension assembly 30, making the saddle angle adjustment more flexible and improving the convenience and safety of the adjustment operation. Furthermore, this invention combines the sliding component 41 and the fastener 43 design, balancing the speed of adjustment with the firmness of locking. This effectively solves the problems of traditional adjustment structures being prone to loosening or inconvenient adjustment due to poor locking, meeting diverse riding needs and achieving multi-stage adjustment and stable fixation of the saddle angle.

[0080] The axle assembly 20 provided by this utility model is equipped with multiple radially arranged and closely spaced positioning holes 212. Combined with the sliding adjustment mechanism of the sliding accessory 41 in the angle adjustment assembly 40 along the long groove 122 of the seat post 10, this allows the bicycle saddle angle adjustment to not only cover a wide range but also be subdivided into multiple smaller positioning angle intervals. During adjustment, the user loosens the axle assembly 20 using the tensioning assembly 30, allowing it to rotate and slide freely relative to the seat post 10. The angle adjustment assembly 40 then slides along the long groove 122 to the desired position. The positioning beads 52 in the positioning assembly 50 elastically abut against the positioning holes 212 of the axle assembly 20 under the elastic force of the spring 53, providing multi-point and precise position locking. This structure effectively solves the problem of inaccurate angle adjustment caused by excessively large spacing between traditional positioning holes, allowing the user to quickly and precisely lock the saddle within the desired commonly used small angle range, improving adjustment flexibility and riding comfort. Meanwhile, the cooperation between the sliding part 41 and the fastener 43 of the angle adjustment assembly 40 ensures that the component slides smoothly in the long groove 122 and can be firmly fixed after positioning to avoid loosening caused by vibration and ensure safe use.

[0081] The angle adjustment assembly 40 slides within the elongated groove 122 on the seat post 10, forming a second angle range that allows the user to adjust the overall tilt angle of the bicycle saddle, providing multiple selectable positions to set the approximate saddle angle. Meanwhile, the axle assembly 20 features multiple radially spaced positioning holes 212, forming a first angle range specifically designed for more precise saddle tilt angle adjustment. Positioning beads 52 in the positioning assembly 50 elastically abut against the positioning holes 212, securing the saddle at the selected angle. The combination of the second angle range of the angle adjustment assembly 40 and the first angle range of the axle assembly 20 allows the user to quickly select an approximate angle by sliding the angle adjustment assembly 40, and then use the positioning holes 212 for multi-point positioning, achieving both approximate angle adjustment and locking of a specific angle, thus improving the accuracy and stability of saddle adjustment.

[0082] like Figure 9 As shown, another preferred embodiment of the bicycle saddle angle adjustment structure provided by this utility model is largely the same as the previous embodiment, with the main difference being that the axle assembly 20 is provided with a positioning hole 214, and the angle adjustment assembly 40 is provided with a positioning hole 415. The positioning assembly 50 is installed in the positioning hole 214 of the axle assembly 20, and the positioning bead 52 of the positioning assembly 50 is pressed against any positioning hole 415 of the angle adjustment assembly 40 by a spring 53, realizing the multi-segment precise positioning function of the angle adjustment assembly 40 on the seat post 10. This structural configuration can effectively improve the flexibility and stability of adjustment, allowing users to quickly and accurately select and fix the required saddle angle, achieving the same adjustment effect and stability as the aforementioned embodiment, effectively meeting the diverse needs of different users for saddle adjustment.

[0083] Finally, it must be reiterated that the constituent elements disclosed in the foregoing embodiments of this utility model are merely illustrative examples and are not intended to limit the scope of protection of this utility model. Any simple structural modifications or changes made without exceeding the scope of this utility model, or any substitutions with other equivalent elements, should still fall within the scope of protection of this utility model.

Claims

1. A bicycle seat angle adjustment structure, characterized in that, Includes: A pipe has a pipe body, a mounting body connected to the pipe body and forming a fixed shaft hole, and a long groove communicating with the fixed shaft hole. A shaft assembly for fixing a seat; the shaft assembly has a shaft that engages with the fixed shaft hole of the seat tube, and a plurality of radially arranged positioning holes; A tensioning assembly is used to tighten or loosen the fixed shaft hole of the seat tube; An adjustment assembly having a sliding part that can be displaced with the long groove of the seat tube; A positioning group is provided in the angle adjustment group and can elastically abut against each of the positioning holes of the shaft group.

2. The bicycle saddle angle adjustment structure according to claim 1, characterized by, The angle adjustment assembly has a sliding part forming the sliding part and a fastener for fixing the sliding part to the seat tube.

3. The bicycle saddle angle adjustment structure according to claim 1, characterized by, The seat tube has an elongated hole communicating with the elongated slot, and the angle adjustment assembly has an extension that can be displaced in the elongated hole of the seat tube.

4. The bicycle saddle angle adjustment structure according to claim 1, characterized by, The positioning assembly has a positioning bead that abuts against each of the positioning holes of the shaft assembly, and a spring that abuts against the positioning bead.

5. The bicycle saddle angle adjustment structure according to claim 1, characterized by The angle adjustment assembly has a positioning hole, and the positioning assembly has a positioning body that is connected to the positioning hole of the angle adjustment assembly.

6. The bicycle saddle angle adjustment structure according to claim 1, characterized by The seat tube has a first connecting part and a second connecting part, and the tensioning assembly connects the first connecting part and the second connecting part of the seat tube.

7. A bicycle seat angle adjustment structure, characterized in that, Includes: A pipe has a pipe body, a mounting body connected to the pipe body and forming a fixed shaft hole, and a long groove communicating with the fixed shaft hole. A shaft assembly for fixing a seat; the shaft assembly has a shaft member that engages with the fixed shaft hole of the seat tube; A tensioning assembly is used to tighten or loosen the fixed shaft hole of the seat tube; An adjustment assembly has a sliding part that can be displaced with the long groove of the seat tube, and a plurality of radially arranged positioning holes; A positioning group is provided on the shaft group and can elastically abut against each of the positioning holes of the angle adjustment group.

8. The bicycle saddle angle adjustment structure according to claim 7, characterized by The angle adjustment assembly has a sliding part forming the sliding part and a fastener for fixing the sliding part to the seat tube.

9. The bicycle saddle angle adjustment structure according to claim 7, characterized by, The seat tube has an elongated hole communicating with the elongated slot, and the angle adjustment assembly has an extension that can be displaced in the elongated hole of the seat tube.

10. The bicycle saddle angle adjustment structure according to claim 7, characterized by, The positioning assembly has a positioning bead that abuts against each of the positioning holes of the angle adjustment assembly, and a spring that abuts against the positioning bead.

11. The bicycle saddle angle adjustment structure according to claim 7, characterized by, The shaft assembly has a positioning hole, and the positioning assembly has a positioning body that is connected to the positioning hole of the shaft assembly.

12. The bicycle saddle angle adjustment structure according to claim 7, characterized by, The seat tube has a first connecting part and a second connecting part, and the tensioning assembly connects the first connecting part and the second connecting part of the seat tube.

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