Seat post adjusting structure

Abstract

The utility model provides a seat post adjusting structure which comprises a seat post connector. The pair of adjusting structures are arranged on the two sides of the seat post connector in the first direction respectively and provided with at least two adjusting positions distributed in the first direction; the first adjusting pieces are provided with first connecting holes; the first connecting structure is arranged on the first adjusting piece and used for being connected with a seat cushion; the locking piece is arranged in the first connecting hole in a penetrating manner; when the first adjusting part is aligned with any adjusting position, the first adjusting part is locked at the corresponding adjusting position by screwing the locking part; when the locking piece is loosened, the first adjusting piece is adjusted to be matched with other adjusting positions. According to the seat post adjusting structure provided by the utility model, the seat post connector is connected with the seat cushion, so that the seat cushion can be adjusted back and forth relative to the folding bicycle base in the linear direction, and the height of the seat cushion can be adjusted when the seat cushion moves in the inclined direction relative to the horizontal plane; and the seat cushion can be adjusted forwards and backwards, and meanwhile, the seat cushion can be subjected to pitching adjustment of up-and-down overturning relative to the folding bicycle base.

Description

Technical Field

[0001] The utility model relates to the technical field of portable vehicle manufacturing, in particular to a seat post adjusting structure. Background Art

[0002] In today's world, more and more attention is paid to energy conservation and emission reduction. China is a well-deserved big country of bicycles, electric vehicles, and various bicycles, electric vehicles, and scooters are widely used. Among them, folding bikes have become a very important type among bicycles, electric vehicles, and scooters due to their advantages of being easy to carry and saving floor space.

[0003] For existing folding bikes, the connection method between the seat post joint (which can be a joint without a support seat post or integrally connected to a support seat post) for connecting the seat cushion and the seat cushion usually only supports the adjustment of the pitching angle of the seat cushion relative to the base of the folding bike for up and down flipping, but cannot make the seat cushion perform front-back position adjustment along a linear direction relative to the base of the folding bike. This limits the front-back and height positions of the seat cushion of the folding bike for riders of different body shapes, affecting the versatility and adaptability of the folding bike. Summary of the Utility Model

[0004] The utility model provides a seat post adjusting structure to solve the technical problem in the prior art that the connection method between the seat post joint and the seat cushion of a traditional folding bike causes the seat cushion unable to be adjusted back and forth along a linear direction relative to the base of the folding bike.

[0005] To solve the above problems, the technical solution adopted by the utility model is as follows:

[0006] The utility model provides a seat post adjusting structure, including:

[0007] A seat post joint;

[0008] A pair of adjusting structures, respectively arranged on both sides of the seat post joint in the first direction, and the adjusting structure is provided with at least two adjusting positions arranged along the first direction;

[0009] A pair of first adjusting members, the first adjusting member is provided with a first connection hole; a first connection structure, arranged on the first adjusting member, for connecting the seat cushion;

[0010] A locking member, passing through the first connection hole;

[0011] When the first adjusting member is aligned with any one of the adjusting positions, the first adjusting member can be locked at the corresponding adjusting position by tightening the locking member;

[0012] When the locking member is loosened, the first adjusting member can be adjusted to align and match other adjusting positions.

[0013] Preferably, the adjustment structure is a guide structure, a pair of guide structures respectively correspond to the two sides of the seat rod joint in the first direction and extend in parallel along the first direction, and the guide structure is provided with a plurality of adjustment positions arranged continuously along the first direction;

[0014] A pair of first adjusting members are movably mounted on a pair of guide structures respectively, and a locking member is inserted through the first connecting hole and the guide structure;

[0015] When the first adjusting member moves along the guide structure to align with any adjusting position, the first adjusting member can be locked at the corresponding adjusting position of the guide structure by tightening the locking member.

[0016] Furthermore, the seat post adjustment structure further includes:

[0017] A first yielding structure is provided on the seat rod joint extending along a first direction and passing through a pair of guide structures;

[0018] The locking member is inserted into the corresponding first connecting holes of the pair of first adjusting members, the pair of guide structures and the first yielding structure;

[0019] When the locking member is loosened, the pair of first adjusting members can reciprocate synchronously along the pair of guide structures.

[0020] Furthermore, the seat post adjustment structure further includes:

[0021] A pair of second adjusting members are movably mounted on the pair of guide structures respectively, one side of the second adjusting member is provided with a first rotation adjusting structure; the other side of the second adjusting member is provided with a second connecting hole matching the first connecting hole and penetrating the first rotation adjusting structure;

[0022] A third adjusting member, wherein a second rotating adjusting structure matching the shape of the first rotating adjusting structure is provided on one side of the third adjusting member; a second connecting structure matching the first connecting structure is provided on the other side of the third adjusting member; and the third adjusting member is further provided with a third connecting hole matching the first connecting hole and penetrating the second rotating adjusting structure;

[0023] The third adjusting member is rotatably mounted on the second adjusting member through the second rotating adjusting structure thereof cooperating with the corresponding first rotating adjusting structure 71, and the second connecting structure cooperates with the first connecting structure to connect to the seat cushion;

[0024] The locking member is inserted into the corresponding first connection holes of the pair of first adjusting members, the corresponding third connection holes of the pair of third adjusting members, the corresponding second connection holes of the pair of second adjusting members, the pair of guide structures and the first yielding structure, so that the pair of first adjusting members are movably mounted on the pair of guide structures respectively through the pair of third adjusting members and the pair of second adjusting members;

[0025] When the second adjusting member moves to any adjusting position along the guide structure and the locking member is tightened, a pair of second adjusting members and a pair of corresponding third adjusting members and a pair of first adjusting members are respectively locked to a pair of guide structures;

[0026] When the locking member is loosened, the pair of second adjusting members can synchronously reciprocate along the pair of guide structures, and the first adjusting member can rotate along the first rotating adjusting structure relative to the corresponding second adjusting member along with the third adjusting member.

[0027] Preferably, the first yielding structure is a strip-shaped yielding through hole penetrating through a pair of guide structures and extending along the first direction.

[0028] Preferably, the first clearance structure comprises at least two point-shaped clearance through holes, each of which is arranged on the seat rod joint and extends at intervals along the first direction and passes through a pair of guide structures.

[0029] Preferably, the guide structure is a first guide groove, and a first sliding block matching the shape of the first guide groove is provided on one side of the first adjusting member;

[0030] A pair of first adjusting members are movably matched with a pair of first guide grooves through a pair of first sliding blocks respectively.

[0031] Preferably, the guide structure is a second guide groove, a second slider matching the shape of the second guide groove is provided on the other side of the second adjusting member, and the second connecting hole passes through the second slider and the second guide groove;

[0032] A pair of second adjusting members are movably matched with a pair of second guide grooves through a pair of second sliding blocks respectively.

[0033] Preferably, the second rotation adjustment structure is a rotating part in a truncated cone shape, and the first rotation adjustment structure is a rotation groove matching the shape of the rotating part;

[0034] The third adjusting member is rotatably mounted on the corresponding second adjusting member by matching the tapered outer side surface of the rotating portion with the tapered inner side surface of the corresponding rotating groove;

[0035] When the locking member is loosened, the first adjusting member can rotate with the third adjusting member through the rotating portion along the rotating groove relative to the corresponding second adjusting member.

[0036] Furthermore, the seat post adjustment structure further includes:

[0037] The first reset mechanism is connected between the pair of first adjusting members and the locking member, and is used for pushing the pair of first adjusting members apart from each other to disengage from the guide structure when the locking member is loosened.

[0038] Preferably, the adjusting structure is a positioning structure, and the positioning structure respectively includes at least two positioning holes arranged at intervals in the first direction on the seat post joint in the first direction, and the setting positions of the positioning holes are used as the respective adjusting positions;

[0039] When the first adjusting member is aligned with any positioning hole and the locking member is aligned and cooperated with the positioning hole, the first adjusting member can be locked at the corresponding adjusting position by tightening the locking member.

[0040] Compared with the prior art, the present utility model has the following beneficial effects:

[0041] The seat post adjusting structure provided by the present utility model has a connection mode between the seat post joint and the seat cushion, which enables the seat cushion to be adjusted in the front-back position along a linear direction relative to the base of the folding bicycle. If it moves in a direction inclined relative to the horizontal plane, it can also simultaneously adjust the height position of the seat cushion to a certain extent; it can also support the adjustment of the pitch angle of the seat cushion to be turned up and down relative to the base of the folding bicycle while adjusting the front-back position of the seat cushion. Therefore, the folding bicycle applying the seat post adjusting structure provided by the present utility model can adapt to the needs of riders with different body shapes for the front-back position, height position and pitch angle of the seat cushion of the folding bicycle, and improve the versatility of the folding bicycle. Description of the Drawings

[0042] In order to more clearly illustrate the technical solutions proposed by the present utility model, the following will be described in detail in combination with embodiments and drawings. It should be understood that the drawings in the following description are only some embodiments of the present utility model, and those skilled in the art can make changes to these drawings under the concept of the present utility model.

[0043] Figure 1 It is the front view of the overall assembly structure of the first embodiment of the seat post adjusting structure provided by the present utility model;

[0044] Figure 2 It is the front view of the overall assembly structure of the first embodiment of the seat post adjusting structure provided by the present utility model;

[0045] Figure 3 It is the rear view of the overall assembly structure of the first embodiment of the seat post adjusting structure provided by the present utility model;

[0046] Figure 4 It is the top view of the overall assembly structure of the first embodiment of the seat post adjusting structure provided by the present utility model;

[0047] Figure 5 It is the three-dimensional view of the overall assembly structure of the first embodiment of the seat post adjusting structure provided by the present utility model;

[0048] Figure 6 For Figure 5 the three-dimensional exploded view of the overall structure of the seat post adjusting structure in

[0049] Figure 7 A three-dimensional diagram of the overall assembly structure of the first yielding structure of the seat post adjustment structure of the utility model using a dot-shaped yielding through hole;

[0050] Figure 8 for Figure 7 The overall exploded structural stereogram of the seat post adjustment structure;

[0051] Figure 9 A three-dimensional diagram of the overall assembly structure of the second embodiment of the seat post adjustment structure provided by the utility model;

[0052] Figure 10 for Figure 9 Another perspective exploded perspective view of the seat post adjustment structure;

[0053] Figure 11 for Figure 9 Another exploded perspective view of the seat post adjustment structure;

[0054] Figure 12 A three-dimensional diagram of the overall assembly structure of the third embodiment of the seat post adjustment structure provided by the utility model;

[0055] Figure 13 for Figure 12 The overall exploded structural stereogram of the seat post adjustment structure;

[0056] Figure 14 A three-dimensional diagram of the overall assembly structure of the fourth embodiment of the seat post adjustment structure provided by the utility model;

[0057] Figure 15 for Figure 14 An exploded perspective view of the overall structure of the seat post adjustment structure.

[0058] Among them, the main marks of the drawings in the figure are as follows:

[0059] 1. Seat post joint; 11. Installation column; 12. Clamping protrusion; 13. Support arm; 14. Reinforcement; 2. Adjustment structure; 21. Guide structure; 211. First guide groove; 212. Second guide groove; 213. Third guide groove; 22. Positioning structure; 221. Positioning hole; 222. Second counterbore; 223. Third reset mechanism; 3. First adjusting member; 31. First connection hole; 311. First counterbore; 312. Clamping groove; 32. First connection structure; 33. First slider; 34. Third slider; 4. Locking member; 41. First locking screw; 42. Second locking screw; 43. Connection sleeve; 431. Sleeve body; 432. Positioning convex ring; 433. Clamping convex block; 434. Threaded connection hole; 44. Third locking screw; 45. Fourth locking screw; 5. First relief structure; 51. Strip-shaped relief through hole; 52. Dot-shaped relief through hole; 53. Connection blind hole; 6. First reset mechanism; 7. Second adjusting member; 71. First rotary adjustment structure; 711. Tapered inner side; 72. Second connection hole; 73. Second slider; 8. Third adjusting member; 81. Second rotary adjustment structure; 811. Tapered outer side; 82. Second connection structure; 83. Third connection hole; 9. Support seat post.

[0060] Among them, other reference numerals in the figure are as follows:

[0061] A. First direction; B. First seat bow channel; C. Second seat bow channel. Detailed implementation manners

[0062] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the Figures 1 - 15 accompanying drawings and embodiments.

[0063] Please refer to Figures 1 - 8 together, the seat post adjustment structure provided by the present utility model includes:

[0064] Seat post joint 1; a pair of adjustment structures 2, respectively arranged on both sides of the seat post joint 1 in the first direction A, and the adjustment structure 2 is provided with at least two adjustment positions arranged along the first direction A; a pair of first adjusting members 3, the first adjusting member 3 is provided with a first connection hole 31; a first connection structure 32, arranged on the first adjusting member 3 for connecting the seat cushion; a locking member 4, passing through the first connection hole 31.

[0065] When the first adjusting member 3 is aligned with any adjustment position, the first adjusting member 3 can be locked at the corresponding adjustment position by tightening the locking member 4; when the locking member 4 is loosened, the first adjusting member 3 can be adjusted to align and match other adjustment positions.

[0066] Please refer to Figures 1 - 8In the first embodiment of the seat post adjustment structure provided by the present utility model:

[0067] The adjustment structure 2 is a guide structure 21. A pair of guide structures 21 are respectively arranged on both sides of the seat rod joint 1 in the first direction A, and extend parallel to the first direction A on both sides of the seat rod joint 1 in the first direction A. The guide structure 21 is provided with a plurality of adjustment positions arranged continuously in the first direction A. A pair of first adjustment members 3 are respectively movably mounted on the pair of guide structures 21. The first adjustment members 3 are provided with first connection holes 31 matching the guide structures 21. The locking member 4 is passed through the first connection hole 31 and the guide structure 21.

[0068] When the locking member 4 is tightened, the first adjusting member 3 is locked at the corresponding adjusting position of the guide structure 21; when the locking member 4 is loosened, the first adjusting member 3 can reciprocate along the guide structure 21, so that the user can reciprocate along the first direction A to adjust the position of the seat cushion between the corresponding pair of first connecting structures 32 connected to the pair of first adjusting members 3 relative to the seat post joint 1. When the first adjusting member 3 moves along the guide structure 21 to align with any adjusting position, the user can lock the first adjusting member 3 at the corresponding adjusting position of the guide structure 21 by tightening the locking member 4.

[0069] Please also read Figure 1 , 5 -8, in the preferred implementation of Example 1:

[0070] The seat post adjustment structure also includes:

[0071] A first yielding structure 5 is provided on the seat post joint 1 extending along the first direction A and passing through the pair of guide structures 21; a locking member 4 is provided, and the locking member 4 is passed through the corresponding first connecting holes 31 of the pair of first adjusting members 3, the pair of guide structures 21 and the first yielding structure 5;

[0072] When the locking member 4 is tightened, the pair of first adjusting members 3 are locked at the corresponding adjustment positions of the pair of guide structures 21 under the tightening action of the locking member 4, and the pair of first adjusting members 3 are respectively matched with a pair of elastic structures (not shown in the figure) on both sides of the bottom of the seat cushion through the corresponding pair of first connecting structures 32 to connect the pair of first adjusting members 3 into a whole;

[0073] When the locking member 4 is loosened, the pair of first adjusting members 3 are still connected into a whole by cooperating with the pair of elastic structures on both sides of the bottom of the seat cushion through the corresponding pair of first connecting structures 32, and the pair of first adjusting members 3 are still respectively matched with the pair of guide structures 21, so that the whole formed by the pair of first adjusting members 3 and the seat cushion can reciprocate synchronously along the pair of guide structures 21, thereby driving the seat cushion to reciprocate along the first direction A relative to the seat rod joint 1 to the required corresponding adjustment position and then locked to adjust the relative position of the seat cushion.

[0074] Please also read Figure 1 , 5 -8, as a preferred implementation scheme of Example 1, the guide structure 21 is a first guide groove 211, and one side of the first adjusting member 3 is provided with a first slider 33 matching the shape of the guide structure 21 (first guide groove 211); a pair of first adjusting members 3 are respectively movably matched to a pair of guide structures 21 (first guide groove 211) through a pair of first sliders 33.

[0075] See also Figure 6 As a preferred implementation of Example 1, the seat post adjustment structure further includes:

[0076] The first reset mechanism 6 is connected between a pair of first adjusting members 3 and a locking member 4 and is disposed in a pair of guide structures 21 and a first yielding structure 5, and is used to push the pair of first adjusting members 3 away from each other to disengage from the guide structure 21 when the locking member 4 is loosened, so that the first adjusting members 3 can reciprocate along the corresponding guide structure 21.

[0077] See also Figure 5 , 6 As a preferred implementation of the first embodiment, the locking member 4 is a first locking screw 41, wherein the first connection hole 31 of one of the first adjustment members 3 is threadedly connected to the first locking screw 41, wherein the first connection hole 31 of the other first adjustment member 3 is a light hole for the first locking screw 41 to pass through. When the first locking screw 41 is tightened, the first locking screw 41 is threadedly screwed relative to the first connection hole 31 of one of the first adjustment members 3, so that the pair of first adjustment members 3 are respectively pressed and locked to the pair of guide structures 21 (first guide grooves 211) under the tightening action of the first locking screw 41.

[0078] See also Figure 5 , 6 As a better implementation of Example 1, the first reset mechanism 6 is a first reset spring, which is sleeved on the first locking screw 41, and the two ends of the first reset spring respectively abut against a pair of first adjusting members 3, and are arranged in a pair of guide structures 21 and the first yielding structure 5.

[0079] Please also read Figures 9 - 11 In the second embodiment of the seat post adjustment structure provided by the utility model:

[0080] The seat post adjustment structure also includes:

[0081] A pair of second adjusting members 7 are respectively and movably mounted on a pair of guiding structures 21 (first guiding grooves 211) along a first direction A. A first rotation adjusting structure 71 is provided on one side of the second adjusting member 7; a second connecting hole 72 that matches the first connecting hole 31 and penetrates through the first rotation adjusting structure 71 is provided on the other side of the second adjusting member 7;

[0082] A third adjusting member 8. A second rotation adjusting structure 81 that matches the outer shape of the first rotation adjusting structure 71 is provided on one side of the third adjusting member 8; a second connecting structure 82 that matches the first connecting structure 32 is provided on the other side of the third adjusting member 8; the third adjusting member 8 further has a third connecting hole 83 that matches the first connecting hole 31 and penetrates through the second rotation adjusting structure 81;

[0083] The third adjusting member 8 is rotatably mounted on the second adjusting member 7 through the cooperation of its second rotation adjusting structure 81 and the corresponding first rotation adjusting structure 71, and the second connecting structure 82 is connected to the first connecting structure 32 of the first adjusting member 3 to form a connecting seat cushion;

[0084] The locking member 4 passes through the corresponding first connecting holes 31 of a pair of first adjusting members 3, the corresponding third connecting holes 83 of a pair of third adjusting members 8, the corresponding second connecting holes 72 of a pair of second adjusting members 7, a pair of guiding structures 21 and the first relief structure 5, so that a pair of first adjusting members 3 are respectively and movably mounted on a pair of guiding structures 21 through a pair of third adjusting members 8 and a pair of second adjusting members 7;

[0085] When the second adjusting member 7 moves along the guiding structure 21 to any adjusting position and the locking member 4 is tightened, a pair of second adjusting members 7 and their corresponding pair of third adjusting members 8 and a pair of first adjusting members 3 are respectively locked on a pair of guiding structures 21;

[0086] When the locking member 4 is loosened, a pair of second adjusting members 7 can reciprocate synchronously along a pair of guiding structures 21, thereby driving the seat cushion to reciprocate relative to the seat post joint 1 along the first direction A to adjust the relative position of the seat cushion; and the first adjusting member 3 can (through the rotation connection and cooperation of the corresponding second rotation adjusting structure 81 and the first rotation adjusting structure 71) rotate relative to the corresponding second adjusting member 7 along the first rotation adjusting structure 71 with the third adjusting member 8, thereby driving the seat cushion to rotate (tilt up and down) relative to the seat post joint 1 around a rotation axis perpendicular to the first direction A (i.e., the axial direction of the locking member 4) to adjust the pitch angle of the seat cushion relative to the seat post joint 1 and the horizontal plane according to the actual needs of the user's body shape.

[0087] Please refer to Figures 9 - 11, as a preferred embodiment of the second embodiment, the guiding structure 21 is a second guiding groove 212. On the other side of the second adjusting member 7, there is a second slider 73 whose shape matches that of the second guiding groove 212. The second connection hole 72 penetrates through the second slider 73 and the second guiding groove 212; a pair of second adjusting members 7 are respectively movably fitted on a pair of second guiding grooves 212 through a pair of second sliders 73.

[0088] Please refer to Figures 9 - 11 , as a preferred embodiment of the second embodiment, the second rotary adjusting structure 81 is a rotary part in the shape of a frustum of a cone, and the first rotary adjusting structure 71 is a rotary connection groove matching the outer shape of the rotary part; through the tapered outer side surface 811 of the rotary part cooperating with the tapered inner side surface 711 of the corresponding rotary connection groove, the third adjusting member 8 is rotatably installed on the corresponding second adjusting member 7; when the locking member 4 is loosened, the first adjusting member 3 can rotate relative to the corresponding second adjusting member 7 along the rotary connection groove through the rotary part with the third adjusting member 8, thereby driving the seat cushion to rotate relative to the seat post joint 1.

[0089] Please refer to Figures 9 - 11 , as a preferred embodiment of the second embodiment, the locking member 4 is a second locking screw 42. The first connection hole 31 of one of the first adjusting members 3 is threadedly connected to the second locking screw 42, and the first connection hole 31 of the other first adjusting member 3 is a clearance hole for the second locking screw 42 to pass through. When the second locking screw 42 is tightened, the second locking screw 42 threadedly advances relative to the first connection hole 31 of one of the first adjusting members 3, so that a pair of first adjusting members 3, a pair of third adjusting members 8, and a pair of second adjusting members 7 are respectively pressed and locked on a pair of guiding structures 21 (second guiding grooves 212) under the fastening action of the second locking screw 42.

[0090] Please refer to Figures 9 - 11 , as a more preferred embodiment of the second embodiment, the locking member 4 is a locking assembly, and the locking assembly includes:

[0091] a connecting sleeve 43 and the above-mentioned second locking screw 42;

[0092] wherein, the connecting sleeve 43 includes a sleeve body 431 provided with a threaded connection hole 434 and a positioning convex ring 432 provided at one end of the sleeve body 431 with an outer diameter larger than that of the sleeve body 431. A clamping convex block 433 connected to the positioning convex ring 432 is provided near the positioning convex ring 432 of the sleeve body 431;

[0093] One end of the first connecting hole 31 of one of the first adjusting members 3 is provided with a first countersunk groove 311 matching the shape of the positioning convex ring 432, and the inner wall of the other end of the first connecting hole 31 away from the first countersunk groove 311 is provided with a snap-in groove 312 matching the snap-in protrusion 433; the connecting sleeve 43 is positioned and installed on the corresponding first adjusting member 3 through the positioning convex ring 432 and the snap-in protrusion 433 corresponding to the first countersunk groove 311 and the snap-in groove 312 respectively, and the sleeve body 431 of the connecting sleeve 43 is inserted into the first connecting hole 31 of the first adjusting member 3, the corresponding third connecting holes 83 of a pair of third adjusting members 8, the corresponding second connecting holes 72 of a pair of second adjusting members 7, a pair of guide structures 21 and the first yielding structure 5.

[0094] The second locking screw 42 is inserted from the first connection hole 31 of the other first adjusting member 3 and is threadedly connected in the threaded connection hole 434. Since the sleeve body 431 of the connecting sleeve passes through the corresponding third connection holes 83 of a pair of third adjusting members 8, the corresponding second connection holes 72 of a pair of second adjusting members 7, a pair of guide structures 21 and the first yielding structure 5 from the first connection hole 31 of one of the first adjusting members 3, and then extends and extends close to the other first connecting member, the second locking screw 42 does not need to be made too long and is easy to be aligned and connected with the threaded connection hole 434 of the connecting sleeve. At the same time, the threaded connection hole 434 in the sleeve body 431 of the connecting sleeve is extended, which is conducive to improving the rotation stroke of the second locking screw 42 and the threaded connection hole 434, thereby improving the tightening strength of the second locking screw 42 and the connecting sleeve to lock the pair of first adjusting members 3, and ensuring the stability of the seat position.

[0095] Please also read Figures 9 - 11 As a preferred implementation of Example 2, the seat post adjustment structure also includes a second reset mechanism (not shown in the figure), which is connected between the second adjustment member 7 and the locking member 4 (the second locking screw 42), and is arranged in a pair of guide structures 21 and the first yielding structure 5, and is used to push the pair of second adjustment members 7 away from each other to disengage from the guide structure 21 when the locking member 4 (the second locking screw 42) is loosened, so that the second adjustment member 7, the third adjustment member 8 and the first adjustment member 3 can reciprocate along the corresponding guide structure 21.

[0096] Please also read Figures 9 - 11 As a better implementation of Example 2, the second reset mechanism is a second reset spring (not shown in the figure), the second reset spring is sleeved on the second locking screw 42, the two ends of the second reset spring respectively abut against a pair of second adjusting members 7, and are arranged in a pair of guide structures 21 and the first yield structure 5.

[0097] Please also read Figure 1 , 56. As an implementation method common to Examples 1 and 2, the first yielding structure 5 is a strip-shaped yielding through hole 51 that penetrates a pair of guide structures 21 and extends along the first direction A. When the strip-shaped yielding through hole 51 is applied to Example 1, the locking member 4 is inserted into the corresponding first connecting holes 31 of a pair of first adjusting members 3, a pair of guide structures 21 (first guide grooves 211) and the strip-shaped yielding through hole 51. When the locking member 4 is loosened, the locking member 4 and the pair of first adjusting members 3 are connected as a whole and reciprocate synchronously and continuously along the first direction A and the pair of guide structures 21 (first guide grooves 211).

[0098] When the strip-shaped clearance hole 51 is applied to Example 2 (not shown in the figure), the locking member 4 is inserted into the corresponding first connecting holes 31 of a pair of first adjusting members 3, the corresponding third connecting holes 83 of a pair of third adjusting members 8, the corresponding second connecting holes 72 of a pair of second adjusting members 7, a pair of guide structures 21 (second guide grooves 212) and the strip-shaped clearance hole 51, and the locking member 4, the pair of first adjusting members 3, the pair of third adjusting members 8 and the pair of second adjusting members 7 are connected as a whole and reciprocate synchronously and continuously along the first direction A and the pair of guide structures 21 (second guide grooves 212).

[0099] Please also read Figures 7 - 11 As another implementation method common to the first and second embodiments, the first clearance structure 5 includes at least two point-shaped clearance through holes 52, each of which is arranged on the seat rod joint 1 at intervals extending along the first direction A and passes through a pair of guide structures 21, and constitutes a through hole dot matrix that is distributed on the seat rod joint 1 at intervals extending along the first direction A and is located between the pair of guide structures 21.

[0100] When the through-hole lattice formed by a plurality of dot-shaped relief through-holes 52 is applied to the first embodiment (not shown in the figure), loosen the locking member 4 (the first locking screw 41) until the locking member 4 (the first locking screw 41) is withdrawn and removed from the corresponding first connection holes 31 of the pair of first adjusting members 3, the pair of guiding structures 21 (the first guiding grooves 211), and the corresponding dot-shaped relief through-holes 52. At this time, the pair of first adjusting members 3 are still connected into a whole by respectively cooperating with a pair of elastic structures on both sides of the bottom of the seat cushion through the corresponding pair of first connection structures 32, and the pair of first adjusting members 3 still maintain cooperation with the pair of guiding structures 21 (the first guiding grooves 211) through the pair of first sliders 33 respectively. Therefore, at this time, the integral structure formed by the pair of first adjusting members 3 and the seat cushion can be reciprocated synchronously and continuously along the first direction A and the pair of guiding structures 21 (the first guiding grooves 211) until the pair of first adjusting members 3 reciprocate synchronously along the pair of guiding structures 21 (the first guiding grooves 211) to the position where the corresponding first connection holes 31 of the pair of first adjusting members 3 are coaxially aligned with a certain dot-shaped relief through-hole 52. Then, reinsert the locking member 4 (the first locking screw 41) into the corresponding first connection holes 31 of the pair of first adjusting members 3, the pair of guiding structures 21 (the first guiding grooves 211), and the dot-shaped relief through-hole 52 and lock it, so as to drive the seat cushion to reciprocate relative to the seat post joint 1 along the first direction A to the position corresponding to and matching a certain dot-shaped relief through-hole 52 and lock it, so as to position and adjust the relative position of the seat cushion along the first direction A to match a certain dot-shaped relief through-hole 52.

[0101] When the through-hole lattice formed by multiple dot-shaped relief through-holes 52 is applied to the second embodiment, loosen the locking member 4 until the locking member 4 is withdrawn and removed from the corresponding first connection holes 31 of the pair of first adjusting members 3, the corresponding third connection holes 83 of the pair of third adjusting members 8, the corresponding second connection holes 72 of the pair of second adjusting members 7, the pair of guiding structures 21 (second guiding grooves 212), and the corresponding dot-shaped relief through-holes 52. At this time, the pair of first adjusting members 3 and the pair of third adjusting members 8 are still integrally connected by the corresponding pair of first connection structures 32 and the pair of second connection structures 82 and respectively cooperate with a pair of elastic structures on both sides of the bottom of the seat cushion, and the pair of second adjusting members 7 still maintain cooperation with the pair of guiding structures 21 (second guiding grooves 212) through the pair of first sliders 33 respectively. Therefore, at this time, the overall structure formed by the pair of second adjusting members 7, the pair of first adjusting members 3, the pair of third adjusting members 8, and the seat cushion can move synchronously and continuously in a reciprocating manner along the first direction A and the pair of guiding structures 21 (second guiding grooves 212) until the corresponding second connection holes 72 of the pair of second adjusting members 7 are coaxially aligned with a certain dot-shaped relief through-hole 52 along the pair of guiding structures 21 (second guiding grooves 212) in a reciprocating manner. Then, reinsert the locking member 4 into the corresponding first connection holes 31 of the pair of first adjusting members 3, the corresponding third connection holes 83 of the pair of third adjusting members 8, the corresponding second connection holes 72 of the pair of second adjusting members 7, the pair of guiding structures 21 (second guiding grooves 212), and this dot-shaped relief through-hole 52 and lock it, so as to drive the seat cushion to reciprocate relative to the seat post joint 1 along the first direction A to the corresponding position of a certain dot-shaped relief through-hole 52 and lock it, so as to position and adjust the relative position of the seat cushion along the first direction A to match a certain dot-shaped relief through-hole 52.

[0102] Please refer to Figure 12 、 13 In the third embodiment of the seat post adjusting structure provided by the present invention, the differences between the seat post adjusting structure and those in the first and second embodiments are as follows:

[0103] There are a pair of locking members 4, which are respectively inserted through a pair of first connection holes 31 and corresponding pair of guiding structures 21; the guiding structure 21 is a third guiding groove 213, and one side of the first adjusting member 3 is provided with a third slider 34 that matches the shape of the third guiding groove 213; the pair of first adjusting members 3 are respectively movably fitted on the pair of third guiding grooves 213 through the pair of third sliders 34. At least two connection blind holes 53 that match the locking members 4 are arranged at intervals along the first direction A on the bottom surface (inner side surface) of the third guiding groove 213 close to the other third guiding groove 213, and each connection blind hole 53 is arranged on the seat post joint 1 extending at intervals along the first direction A, and forms a blind hole lattice distributed at intervals along the first direction A on the third guiding groove 213; that is, the seat post joint 1 forms a partition wall (not shown in the figure) that separates the pair of third guiding grooves 213 between the pair of third guiding grooves 213, and the corresponding blind hole lattices on the bottom surfaces of the pair of third guiding grooves 213 are symmetrically arranged on the partition wall in a mirror image manner.

[0104] When the pair of locking members 4 are respectively tightened until the pair of locking members 4 are connected to the corresponding connection blind holes 53, the pair of first adjusting members 3 are respectively locked to the guiding structure 21 (the third guiding groove 213); when the pair of locking members 4 are respectively loosened until the locking members 4 are disengaged from the corresponding connection blind holes 53, at this time, the pair of first adjusting members 3 are still connected into a whole through the pair of first connection structures 32 on both sides of the bottom of the seat cushion and respectively cooperate with a pair of elastic structures, and the pair of first adjusting members 3 still respectively maintain cooperation with the pair of guiding structures 21 (the third guiding groove 213) through the pair of third sliders 34. Therefore, at this time, the overall structure formed by the pair of first adjusting members 3 and the seat cushion can be reciprocated synchronously and continuously along the first direction A and the pair of guiding structures 21 (the third guiding groove 213) until the pair of first adjusting members 3 reciprocate synchronously along the pair of guiding structures 21 (the third guiding groove 213) to the corresponding first connection holes 31 of the pair of first adjusting members 3 and a certain pair of connection blind holes 53 are coaxially aligned. Then, the pair of locking members 4 are respectively reinserted through the corresponding first connection holes 31 of the pair of first adjusting members 3, the pair of guiding structures 21 (the third guiding groove 213), and the pair of connection blind holes 53 and locked, so as to drive the seat cushion to reciprocate relative to the seat post joint 1 along the first direction A to the corresponding position to cooperate with a certain pair of connection blind holes 53 and lock, so as to position and adjust the relative position of the seat cushion along the first direction A to match a certain pair of connection blind holes 53.

[0105] Please refer to Figure 12 、 13As a preferred implementation of the third embodiment, the locking member 4 is a third locking screw 44, and the first connection hole 31 of the first adjustment member 3 is a light hole for the third locking screw 44 to pass through. When a pair of third locking screws 44 are tightened respectively, the pair of third locking screws 44 are screwed into the connection blind holes 53 of the corresponding guide structures 21 (third guide grooves 213), so that the pair of first adjustment members 3 are respectively pressed and locked to the pair of guide structures 21 (third guide grooves 213) under the tightening action of the third locking screws 44.

[0106] See also Figure 14 , 15 In the fourth embodiment of the seat post adjustment structure provided by the present invention, the differences between the seat post adjustment structure and the embodiments 1 to 3 are as follows:

[0107] The above-mentioned adjustment structure 2 is a positioning structure 22, which includes at least two positioning holes 221 arranged at intervals along the first direction A on the seat rod joint 1 in the first direction A, and the setting position of each positioning hole 221 serves as each adjustment position; when the first adjustment member 3 is aligned with any positioning hole 221, and the corresponding locking member 4 is aligned with the positioning hole 221 at the same time, the first adjustment member 3 can be locked in the corresponding adjustment position by tightening the locking member 4.

[0108] See also Figure 14 , 15 In one implementation of the fourth embodiment, the positioning hole 221 may be a through hole that penetrates the seat post joint 1 on both sides in the first direction A in a direction perpendicular to the first direction A. In this case, the positioning structure 22 is provided with only one group of positioning holes 221, and only one locking member 4 is provided. When the first adjustment member 3 is aligned with any positioning hole 221 in the group, and the locking member 4 that is provided in the corresponding first connecting hole 31 of one of the first adjustment members 3 is simultaneously provided in the positioning hole 221 and aligned with the positioning hole 221, the locking member 4 is connected and matched with the corresponding first connecting hole 31 of the other first adjustment member 3 through the end that is away from the first adjustment member 3 and extends through the positioning hole 221 to the other side of the seat post joint 1, and the first adjustment members 3 can be locked at both sides of the corresponding adjustment position by tightening the locking member 4.

[0109] When the locking piece 4 is loosened until its rear end is disengaged from the corresponding first connecting hole 31 of the other first adjusting piece 3, the locking piece 4 together with the first adjusting piece 3 can be removed from the corresponding positioning hole 221. When the first adjusting piece 3 is moved to be aligned with the required other positioning holes 221 of the group and the locking piece 4 is simultaneously penetrated into the positioning hole 221 and aligned with the positioning hole 221, the locking piece 4 can be reconnected and matched with the corresponding first connecting hole 31 of the other first adjusting piece 3 through the locking piece 4, and the locking piece 4 can be retightened to simultaneously lock a pair of first adjusting pieces 3 on both sides of the required other adjustment positions.

[0110] Please refer to Figure 14 and 15 , in an implementation manner of the fourth embodiment, the seat post adjusting structure further includes:

[0111] A third reset mechanism 223, connected between a pair of first adjusting members 3 and the locking member 4, and disposed in the corresponding positioning holes 221 of the positioning structure 22, for pushing a pair of first adjusting members 3 away from each other to disengage from the positioning structure 22 when the locking member 4 is loosened, so that the first adjusting member 3 can be moved to other positioning holes 221 of the positioning structure 22 corresponding to other required adjusting positions.

[0112] Please refer to Figure 14 and 15 , as a preferred implementation manner of the fourth embodiment, the locking member 4 is a fourth locking screw 45, the first connection hole 31 of one of the first adjusting members 3 is threadedly connected to the fourth locking screw 45, and the first connection hole 31 of the other first adjusting member 3 is a clearance hole for the fourth locking screw 45 to pass through. When the fourth locking screw 45 is tightened, the fourth locking screw 45 rotates threadedly into the first connection hole 31 of one of the first adjusting members 3, so that a pair of first adjusting members 3 are respectively pressed and locked in the positioning structure 22 (positioning hole 221) under the fastening action of the fourth locking screw 45.

[0113] Please refer to Figure 14 and 15 , as a more preferred implementation manner of the fourth embodiment, the third reset mechanism 223 is a third reset spring, the third reset spring is sleeved on the fourth locking screw 45, and both ends of the second reset spring respectively abut against a pair of first adjusting members 3 and are disposed in the corresponding positioning holes 221 of the positioning structure 22.

[0114] Please refer to Figure 14 and 15 , in a more preferred implementation manner of the fourth embodiment, both ends of the positioning hole 221 (through hole) respectively form a pair of second countersunk head grooves 222 on both sides of the seat post joint 1 in the first direction A, the shape of the second countersunk head grooves 222 matches the outer shape of the first adjusting member 3, and the inner wall of the second countersunk head grooves 222 is inclined, the distance (groove inner diameter) near the groove opening is larger, and the distance (groove inner diameter) near the groove bottom surface (inner side) is smaller. That is, the second countersunk head grooves 222 are tapered grooves with the distance from the groove bottom surface (inner side) to the groove opening gradually increasing, and correspondingly, the inner side of the first adjusting member 3 cooperating with the inner wall of the second countersunk head grooves 222 is a tapered surface with the outer wall matching the inclination angle of the tapered groove (second countersunk head grooves 222), so as to realize the fastening fit between the first adjusting member 3 and the second countersunk head grooves 222 when the locking member 4 is tightened.

[0115] In another implementation manner of the fourth embodiment (not shown in the figure), the positioning holes 221 may also be blind holes respectively formed on both sides of the seat post joint 1 in the first direction A along a direction perpendicular to the first direction A. At this time, the positioning structure 22 includes two groups of positioning holes 221 (blind holes) arranged at intervals along the first direction A on both sides of the seat post joint 1 in the first direction A. The two groups of positioning holes 221 (blind holes) are sequentially adjacent and spaced in pairs on both sides of the seat post joint 1 in the first direction A and are not communicated with each other; there is a pair of locking members 4.

[0116] When the first adjusting member 3 is aligned with any positioning hole 221, and the locking member 4 disposed in the corresponding first connection hole 31 of one of the first adjusting members 3 is simultaneously aligned and engaged with this group of positioning holes 221 (i.e., inserted and connected into this positioning hole 221), by tightening the locking member 4, one of the first adjusting members 3 can be locked on one side of the corresponding adjustment position. Similarly, the other first adjusting member 3 can be locked in another group of positioning holes 221 on the opposite side of the corresponding adjustment position by tightening the other locking member 4.

[0117] When the locking member 4 is loosened until it disengages from the corresponding positioning hole 221, the locking member 4 together with the first adjusting member 3 can be removed from the corresponding positioning hole 221. When the first adjusting member 3 is moved to be aligned with other required positioning holes 221, the locking member 4 can be reconnected and engaged with the other positioning holes 221, and the locking member 4 can be tightened again to lock the first adjusting member 3 on one side of the required other adjustment position. Similarly, the other first adjusting member 3 can be locked on the opposite side of the corresponding other adjustment position by tightening the other locking member 4.

[0118] Please refer to Figures 1 - 6 At the same time, as a common implementation manner of the first to fourth embodiments, the above seat cushion is disposed above the seat post joint 1 and connected between the corresponding first connection structures 32 of a pair of first adjusting members 3. The seat cushion is disposed above the seat post joint 1. The above elastic structure is a pair of elastic seat bows respectively disposed on both sides of the bottom of the seat cushion, and the first connection structure 32 is a first connection groove disposed on the first adjusting member 3.

[0119] Please refer to Figures 2 - 5 Figures 7 and 12 and 14. In the preferred implementation manners of the first, third, and fourth embodiments, the first connection grooves (first connection structures 32) of a pair of first adjusting members 3 and both sides of the seat post joint 1 in the first direction A respectively enclose a pair of first seat bow channels B for a pair of elastic seat bows at the bottom of the seat cushion to pass through. By loosening or tightening the locking member 4, the radial dimension of the first seat bow channel B is changed, so that the radial dimension of the first seat bow channel B is reduced to clamp the elastic seat bow in the first seat bow channel B, thereby fixing the position of the seat cushion; or the radial dimension of the first seat bow channel B is enlarged to enable the elastic seat bow to disengage from the first seat bow channel B, thereby disassembling the elastic seat bow together with the seat cushion from the seat post joint 1.

[0120] Please refer to Figure 9 In a preferred embodiment of the second embodiment, the second connection structure 82 is a second connection groove provided on the other side of the third adjusting member 8 and matching the first connection groove. The first connection grooves of a pair of first adjusting members 3 and the second connection grooves of a pair of third adjusting members 8 respectively form a pair of second seat bow channels C for a pair of elastic seat bows at the bottom of the seat cushion to pass through, and the radial dimension of the second seat bow channels C is changed by the tightening locking member 4, so that the radial dimension of the second seat bow channels C is reduced to clamp the elastic seat bows in the second seat bow channels C, thereby fixing the position of the seat cushion; or the radial dimension of the second seat bow channels C is enlarged to enable the elastic seat bows to disengage from the second seat bow channels C, thereby detaching the elastic seat bows together with the seat cushion from the seat post joint 1.

[0121] Please refer to together Figure 6 、 10 、13. In a preferred embodiment of the first to third embodiments, the first guide groove 211, the second guide groove 212 and the third guide groove 213 are preferably provided with inclined inner walls on both sides, and the distances between the corresponding inner walls on both sides of the first guide groove 211, the second guide groove 212 and the third guide groove 213 are larger near the slot openings and smaller near the slot bottom surfaces (inner sides). That is, the first guide groove 211, the second guide groove 212 and the third guide groove 213 are tapered grooves with the distances between the inner walls on both sides gradually increasing from the slot bottom surfaces (inner sides) to the slot openings. Correspondingly, the outer walls on both sides of the first slider 33, the second slider 73 and the third slider 34 that cooperate with the corresponding inner walls on both sides of the first guide groove 211, the second guide groove 212 and the third guide groove 213 are tapered surfaces matching the inclination angles of the tapered grooves, realizing a tight fit.

[0122] Please refer to together Figures 1 - 15 In a preferred embodiment of the first to third embodiments, the folding bicycle further includes:

[0123] A reinforcing member 14, connected between the mounting column 11 and the support arm 13 to improve the structural strength of the seat post joint 1.

[0124] The present invention also provides a folding bicycle (not shown in the figure), including a base and a seat cushion, and further including the above-mentioned seat post adjusting structure, and the seat post joint 1 is installed on the base.

[0125] Please refer to together Figures 1 - 15 In one embodiment, the folding bicycle further includes:

[0126] A support seat post 9, which is connected between the seat post joint 1 and the base.

[0127] Please refer to together Figures 1 - 6 As a preferred embodiment, the support seat post 9 is a hollow seat tube, and the seat post joint 1 includes:

[0128] The mounting column 11 has a clamping protrusion 12 at its bottom end, the outer diameter of which matches the inner diameter of the hollow seat tube (supporting seat rod 9); a support arm 13 is obliquely connected to one side of the mounting column 11, and an obtuse angle greater than 90 degrees and less than 180 degrees is formed between the support arm 13 and the axial direction of the mounting column 11, and the above-mentioned guide structure 21 and the first yielding structure 5 are arranged on the support arm 13; the hollow seat tube (supporting seat rod 9) is fitted with the outer wall of the clamping protrusion 12 through its inner side wall, so that the top of the hollow seat tube (supporting seat rod 9) is connected to the bottom of the mounting column 11 of the seat rod joint 1; that is, the clamping protrusion 12 at the bottom of the mounting column 11 is inserted downward from the top opening of the hollow seat tube into the hollow seat tube (supporting seat rod 9), and the bottom of the mounting column 11 is supported on the top of the hollow seat tube (supporting seat rod 9).

[0129] Please also read Figures 1 - 6 In a more preferred embodiment, the hollow seat tube (supporting seat rod 9) is vertically installed on the base, and the obtuse angle formed between the support arm 13 and the vertical axis of the mounting column 11 causes the support wall to extend upward obliquely at an elevation angle relative to the horizontal plane from one side of the mounting column 11, so that the first direction is a direction extending upward obliquely at an elevation angle relative to the horizontal plane, that is, the seat cushion can adjust its front and rear position relative to the base of the folding bicycle along the first direction while adjusting its height position up and down.

[0130] Please also read Figures 1 - 6 In another more preferred embodiment, the inner side wall of the top opening of the hollow seat tube (supporting the seat rod 9) is wider near the top opening (at a higher height) and narrower away from the top opening (at a lower height).

[0131] That is, the inner wall of the top opening of the hollow seat tube (supporting the seat rod 9) presents a tapered surface with the inner diameter gradually decreasing from the top opening to the deep inside of the tube body, and correspondingly, the outer wall of the clamping protrusion 12 that cooperates with the inner wall of the top opening of the hollow seat tube (supporting the seat rod 9) presents a tapered surface that matches the taper of the inner wall.

[0132] In other embodiments, a supporting seat post connected to the base may also be integrally provided at the bottom of the seat post joint 1 .

[0133] As a preferred embodiment, the portable vehicle is a bicycle, a scooter, an electric vehicle, a folding vehicle or a wheelchair.

[0134] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A seat post adjustment structure, characterized in that: include: Seat post joint (1); A pair of adjustment structures (2), respectively arranged on two sides of the seat post joint (1) in a first direction (A), wherein the adjustment structure (2) is provided with at least two adjustment positions arranged along the first direction (A); A pair of first adjusting members (3), each of the first adjusting members (3) being provided with a first connecting hole (31); a first connecting structure (32) being provided on the first adjusting member (3) and being used for connecting to a seat cushion; A locking member (4) is inserted into the first connecting hole (31); When the first adjusting member (3) is aligned with any adjusting position, the first adjusting member (3) can be locked at the corresponding adjusting position by tightening the locking member (4); When the locking member (4) is loosened, the first adjusting member (3) can be adjusted to align and match other adjustment positions.

2. The seat post adjustment structure according to claim 1, characterized in that: The adjustment structure (2) is a guide structure (21), a pair of the guide structures (21) respectively correspond to the two sides of the seat rod joint (1) in the first direction (A) and extend in parallel along the first direction (A), and the guide structure (21) is provided with a plurality of adjustment positions arranged continuously along the first direction (A); A pair of the first adjusting members (3) are respectively movably mounted on a pair of guide structures (21), and the locking member (4) is inserted into the first connecting hole (31) and the guide structure (21); When the first adjusting member (3) moves along the guide structure (21) to align with any adjusting position, the first adjusting member (3) can be locked at the corresponding adjusting position of the guide structure (21) by tightening the locking member (4).

3. The seat post adjustment structure according to claim 2, characterized in that: Also includes: A first yielding structure (5) is provided on the seat rod joint (1) extending along a first direction (A) and passes through a pair of guide structures (21); The locking member (4) is inserted into the corresponding first connecting holes (31) of a pair of first adjusting members (3), a pair of guide structures (21) and a first yielding structure (5); When the locking member (4) is loosened, the pair of first adjusting members (3) can synchronously reciprocate along a pair of guide structures (21).

4. The seat post adjustment structure according to claim 3, characterized in that: Also includes: A pair of second adjusting members (7) are movably mounted on a pair of guide structures (21), respectively; a first rotation adjusting structure (71) is provided on one side of the second adjusting member (7); and a second connecting hole (72) matching the first connecting hole (31) and penetrating the first rotation adjusting structure (71) is provided on the other side of the second adjusting member (7); A third adjusting member (8), wherein one side of the third adjusting member (8) is provided with a second rotating adjusting structure (81) matching the appearance of the first rotating adjusting structure (71); the other side of the third adjusting member (8) is provided with a second connecting structure (82) matching the first connecting structure (32); the third adjusting member (8) is also provided with a third connecting hole (83) matching the first connecting hole (31) and penetrating the second rotating adjusting structure (81); The third adjusting member (8) is rotatably mounted on the second adjusting member (7) by cooperating with the corresponding first rotating adjusting structure (71) through its second rotating adjusting structure (81), and the second connecting structure (82) cooperates with the first connecting structure (32) to connect the seat cushion; The locking member (4) is inserted into the corresponding first connection holes (31) of the pair of first adjusting members (3), the corresponding third connection holes (83) of the pair of third adjusting members (8), the corresponding second connection holes (72) of the pair of second adjusting members (7), the pair of guide structures (21) and the first yielding structure (5), so that the pair of first adjusting members (3) are movably mounted on the pair of guide structures (21) respectively through the pair of third adjusting members (8) and the pair of second adjusting members (7); When the second adjusting member (7) moves along the guide structure (21) to any adjusting position and the locking member (4) is tightened, a pair of second adjusting members (7) and a corresponding pair of third adjusting members (8) and a pair of first adjusting members (3) are respectively locked to a pair of guide structures (21); When the locking member (4) is loosened, the pair of second adjusting members (7) can synchronously reciprocate along the pair of guide structures (21), and the first adjusting member (3) can rotate along the first rotating adjusting structure (71) with the third adjusting member (8) relative to the corresponding second adjusting member (7).

5. The seat post adjustment structure according to claim 3 or 4, characterized in that: The first yielding structure (5) is a strip-shaped yielding through hole (51) that penetrates through a pair of the guide structures (21) and extends along the first direction (A).

6. The seat post adjustment structure according to claim 3 or 4, characterized in that: The first clearance structure (5) comprises at least two point-shaped clearance through holes (52), each of which is arranged on the seat rod joint (1) at intervals and extends along the first direction (A) and passes through a pair of guide structures (21).

7. The seat post adjustment structure according to claim 3, characterized in that: The guide structure (21) is a first guide groove (211), and a first sliding block (33) matching the shape of the first guide groove (211) is provided on one side of the first adjusting member (3); A pair of first adjusting members (3) are movably matched to a pair of first guide grooves (211) through a pair of first sliding blocks (33).

8. The seat post adjustment structure according to claim 4, characterized in that: The guide structure (21) is a second guide groove (212); a second sliding block (73) having a shape matching that of the second guide groove (212) is provided on the other side of the second adjusting member (7); and the second connecting hole (72) passes through the second sliding block (73) and the second guide groove (212); A pair of second adjusting members (7) are movably matched to a pair of second guide grooves (212) through a pair of second sliding blocks (73).

9. The seat post adjustment structure according to claim 2 or 3, characterized in that: Also includes: The first reset mechanism (6) is connected between the pair of first adjusting members (3) and the locking member (4) and is used to push the pair of first adjusting members (3) away from each other to disengage from the guide structure (21) when the locking member (4) is loosened.

10. The seat post adjustment structure according to claim 1, characterized in that: The adjustment structure (2) is a positioning structure (22), and the positioning structure (22) comprises at least two positioning holes (221) arranged at intervals on the seat rod joint (1) along the first direction (A), and the setting position of each positioning hole (221) serves as each adjustment position; When the first adjusting member (3) is aligned with any positioning hole (221), and the locking member (4) is aligned with and matched with the positioning hole (221), the first adjusting member (3) can be locked at the corresponding adjustment position by tightening the locking member (4).

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