Seat post structure and bicycle

Abstract

The utility model provides a seat post structure and a bicycle. The seat post structure comprises an upper tube and a shock absorption mechanism. The upper tube has a longitudinal axis. The shock-absorbing mechanism is pivoted between the upper end of the upper pipe and the cushion, and comprises a pressing arm and a torsion spring. The pressing arm is used for rotating relative to the upper pipe. The torsion spring comprises a first end and a second end, and the first end corresponds to the pressing and abutting arm. When the cushion applies pressure to the shock absorption mechanism, the pressing and abutting arm drives the first end to rotate relative to the second end. Therefore, the shock-proof effect is achieved.

Description

Technical Field

[0001] The utility model relates to a seat post structure and a bicycle, in particular to a seat post structure with a shock-absorbing function and a bicycle. Background Art

[0002] The bicycle has a frame, a seat post can be installed on the frame and a seat cushion can be arranged on the frame, whereby a user can sit on the seat cushion and step on pedals to move the bicycle forward.

[0003] Since the road condition is unstable, the bicycle is easily vibrated by the road condition, causing the user to feel uncomfortable. Therefore, the existing bicycle is provided with front and rear fork shock absorbing structures to achieve the shock absorbing function.

[0004] Although this type of front and rear fork shock-absorbing structure can achieve a certain shock-absorbing effect, the seat post will still be affected by vibration. Therefore, some industry insiders have developed a seat post shock-absorbing structure, which can include an upper tube and a lower tube, with a seat cushion disposed on the upper tube. The shock-absorbing structure can allow the upper tube and the lower tube to move relative to each other to achieve shock absorption. However, the connection between the seat cushion and the upper tube is still rigid, so the shock-absorbing effect achieved is limited, and there is still room for improvement. Utility Model Content

[0005] The utility model provides a seat post structure and a bicycle. Through the structural configuration of the seat post structure, shock absorption can be generated between a seat cushion and the seat post structure, so as to improve riding comfort.

[0006] According to one embodiment of the utility model, a seat post structure is provided, comprising an upper tube and a shock absorbing mechanism. The upper tube has a longitudinal axis. The shock absorbing mechanism is pivotally connected between the upper end of the upper tube and the seat cushion, and the shock absorbing mechanism comprises a pressing arm and a torsion spring. The pressing arm is used to rotate relative to the upper tube. The torsion spring comprises a first end and a second end, and the first end corresponds to the pressing arm. When the seat cushion applies pressure to the shock absorbing mechanism, the pressing arm drives the first end to rotate relative to the second end.

[0007] Thereby, the shock absorbing mechanism is pivotally connected between the upper tube and the seat cushion, so that a direct shock absorbing effect can be produced on the seat cushion.

[0008] The seat post structure according to the aforementioned embodiment may further include a preload adjustment mechanism, which includes a driving member and a lifting rod. The driving member is disposed in the upper tube. The lifting rod is disposed in the upper tube and corresponds to the second end of the torsion spring, and the lifting rod is driven to rotate by the driving member. The lifting rod moves from a first position to a second position along the longitudinal axis. When the lifting rod is positioned at the first position, the second end of the torsion spring and the first end are clamped at a first angle. When the lifting rod moves to the second position, the second end of the torsion spring moves along the longitudinal axis to clamp a second angle with the first end. The second angle is different from the first angle, so as to change the preload of the torsion spring.

[0009] According to the seat rod structure of the aforementioned embodiment, the shock absorbing mechanism may further include a linkage arm, a setting rod and a shock absorbing body. The linkage arm is pivotally connected to the upper end of the upper tube and faces the pressing arm. The setting rod is pivotally connected between the linkage arm and the pressing arm to form a multi-link structure and a shock absorbing space with the linkage arm and the pressing arm, and the setting rod is pivotally connected to the seat cushion. The shock absorbing body is arranged in the shock absorbing space. When the seat cushion applies pressure to the shock absorbing mechanism, the multi-link structure rotates relative to the upper tube.

[0010] According to the seat post structure of the aforementioned embodiment, the upper tube may include a tube wall and a convex ring. The tube wall surrounds an internal space. The convex ring protrudes from the tube wall toward the internal space and includes an inner screw hole, which is connected to the internal space and is threadedly connected to the lifting rod.

[0011] According to the seat rod structure of the aforementioned embodiment, the driving member can be rotatably supported on the convex ring and can include a central through hole and two guide blocks. The central through hole is connected to the inner screw hole and is provided for the lifting rod to be lifted and lowered. The two guide blocks are symmetrically arranged in the central through hole and respectively protrude into the two guide grooves of the lifting rod.

[0012] According to the seat post structure of the aforementioned embodiment, the preload adjustment mechanism may further include an elastic buckle, and the upper tube further includes an inner groove recessed in the tube wall, and the elastic buckle is engaged with the inner groove, so that the driving member is limited between the elastic buckle and the convex ring.

[0013] According to the seat post structure of the aforementioned embodiment, the preload adjustment mechanism may further include two bushings, which are respectively sleeved on the top end and the bottom end of the driving member.

[0014] According to the seat post structure of the aforementioned embodiment, the upper tube may further include radial through holes, the radial through holes penetrate the tube wall, the driving member may include a plurality of recesses, the tool passes through the radial through holes to be inserted into the recesses, and drives the driving member to rotate around the longitudinal axis to drive the lifting rod to lift and lower along the two guide blocks relative to the inner screw holes.

[0015] According to another embodiment of the present invention, a bicycle is provided, comprising a frame, two wheels and a seat post structure as described in the above embodiment. The two wheels are arranged on the frame, and the seat post structure is arranged on the frame.

[0016] According to the bicycle of the aforementioned embodiment, the seat post structure may further include a preload adjustment mechanism, which includes a driving member and a lifting rod. The driving member is disposed in the upper tube. The lifting rod is disposed in the upper tube and corresponds to the second end of the torsion spring, and the lifting rod is driven to rotate by the driving member. The lifting rod moves from a first position to a second position along the longitudinal axis. When the lifting rod is positioned at the first position, the second end of the torsion spring is clamped with the first end at a first angle. When the lifting rod moves to the second position, the second end of the torsion spring moves along the longitudinal axis to clamp with the first end at a second angle. The second angle is different from the first angle, so as to change the preload of the torsion spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional schematic diagram of a seat post structure according to an embodiment of the present invention is shown;

[0018] Figure 2 To illustrate Figure 1 An exploded schematic diagram of the seat post structure of an embodiment;

[0019] Figure 3 To illustrate Figure 1 A schematic cross-sectional view of a seat post structure of an embodiment;

[0020] Figure 4 To illustrate Figure 1 Another schematic cross-sectional view of the seat post structure of the embodiment;

[0021] Figure 5 A schematic side view of a bicycle according to another embodiment of the present invention is shown; and

[0022] Figure 6 To illustrate Figure 5 A schematic diagram of a shock-absorbing seat of a bicycle according to an embodiment. DETAILED DESCRIPTION

[0023] The following will describe embodiments of the present invention with reference to the accompanying drawings. For the sake of clarity, many practical details will be described together in the following description. However, the reader should understand that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and elements will be illustrated in a simple schematic manner in the drawings; and repeated elements may be represented by the same number or similar number.

[0024] In addition, the terms "first", "second", "third" and the like in this document are only used to describe different elements or components, and do not limit the elements / components themselves. Therefore, the first element / component may also be referred to as the second element / component. Moreover, the combination of elements / components / mechanisms / modules in this document is not a generally known, conventional or existing combination in this field. Whether the elements / components / mechanisms / modules themselves are existing cannot be used to determine whether their combination relationship is easy to be easily completed by a person of ordinary skill in the technical field.

[0025] See also Figure 1 and Figure 2 ,in Figure 1 FIG. 1 is a three-dimensional schematic diagram of a seat post structure 1000 according to an embodiment of the present invention. Figure 2 To illustrate Figure 1An exploded schematic diagram of a seat post structure 1000 according to an embodiment. The seat post structure 1000 includes a top tube 1100 and a shock absorbing mechanism 1200 .

[0026] The upper tube 1100 has a longitudinal axis X1 (indicated at Figure 3 The shock absorbing mechanism 1200 is pivotally connected to the upper end (not shown) of the upper tube 1100 and the seat cushion (not shown). Figures 1 to 4 The shock absorbing mechanism 1200 includes a pressing arm 1210 and a torsion spring 1240. The pressing arm 1210 is used to rotate relative to the upper tube 1100. The torsion spring 1240 includes a first end 1241 and a second end 1242, and the first end 1241 corresponds to the pressing arm 1210. When the seat cushion applies pressure to the shock absorbing mechanism 1200, the pressing arm 1210 drives the first end 1241 to rotate relative to the second end 1242.

[0027] Thus, the shock absorbing mechanism 1200 is pivotally connected between the upper tube 1100 and the seat cushion, thereby producing a direct shock absorbing effect on the seat cushion.

[0028] See also Figure 3 and Figure 4 ,in Figure 3 To illustrate Figure 1 A schematic cross-sectional view of the seat post structure 1000 of the embodiment, Figure 4 To illustrate Figure 1 Another cross-sectional view of the seat post structure 1000 of the embodiment. The upper tube 1100 may be a hollow tubular structure, and thus may include a tube wall 1110, and the tube wall 1110 surrounds an internal space (not shown). In addition, the upper tube 1100 may further include a setting portion 1130, which is connected to the tube wall 1110 and can be regarded as the upper end of the upper tube 1100. The setting portion 1130 may include a pin hole (not shown) for the suspension mechanism 1200 to be pivotally mounted.

[0029] The shock absorbing mechanism 1200 may further include a linkage arm 1220, a setting rod 1230 and a shock absorbing body 1250. The linkage arm 1220 is pivotally connected to the upper end of the upper tube 1100 and faces the pressing arm 1210. The setting rod 1230 is pivotally connected between the linkage arm 1220 and the pressing arm 1210 to form a multi-link structure (not shown) and a shock absorbing space (not shown) with the linkage arm 1220 and the pressing arm 1210, and the setting rod 1230 is pivotally connected to the seat cushion. The shock absorbing body 1250 is arranged in the shock absorbing space. When the seat cushion applies pressure to the shock absorbing mechanism 1200, the multi-link structure can rotate relative to the upper tube 1100.

[0030] Specifically, the pressing arm 1210 may include an upper pivot 1211, a lower pivot 1212, and a plate 1213, wherein the upper pivot 1211 integrally protrudes upward from the plate 1213, and the lower pivot 1212 integrally protrudes downward from the plate 1213. The shock-absorbing mechanism 1200 may further include a pin 1260 that passes through the lower pivot 1212 and the pin hole of the setting portion 1130 to pivotally connect the pressing arm 1210 to the setting portion 1130. Similarly, the linkage arm 1220 may be pivotally connected to the pin hole of the setting portion 1130 through another pin (not shown), so that the linkage arm 1220 is opposite to the pressing arm 1210. The setting rod 1230 can be pivotally connected between the upper pivot 1211 of the pressing arm 1210 and the upper pivot (not shown) of the linkage arm 1220 , so that the pressing arm 1210 , the linkage arm 1220 and the setting rod 1230 can form a multi-link structure with four pivot points.

[0031] The shock absorbing body 1250 may be made of an elastic material, and its shape corresponds to the shape of the shock absorbing space. Figure 2 As shown, the setting rod 1230 may include a rod body 1231 and a convex portion 1233, and the convex portion 1233 protrudes downward from the rod body 1231. The shock absorber 1250 may include a groove 1251. Therefore, when the shock absorber 1250 is accommodated in the shock absorber space, the convex portion 1233 protrudes into the groove 1251, so that the shock absorber 1250 is confined in the shock absorber space.

[0032] The shock absorbing mechanism 1200 may further include a cushion pivot 1270, the cushion pivot 1270 including two pivot plates 1271 and two first tooth rows 1272, the two pivot plates 1271 are pivoted on two sides of the rod body 1231, and each first tooth row 1272 is disposed on each pivot plate 1271. The setting rod 1230 may further include two second tooth rows 1232, the two second tooth rows 1232 are respectively located on two sides of the rod body 1231. Therefore, the two first tooth rows 1272 may correspond to the two second tooth rows 1232, respectively. The cushion may be pivoted on the cushion pivot 1270, and may be pivoted relative to the setting rod 1230.

[0033] The torsion spring 1240 can be sleeved on the pin 1260, and the first end 1241 is located in the shock-absorbing space and correspondingly presses against the plate 1213 of the pressing arm 1210. The second end 1242 of the torsion spring 1240 can protrude into the internal space.

[0034] The seat post structure 1000 may further include a preload adjustment mechanism 1300, which includes a driving member 1310 and a lifting rod 1320. The driving member 1310 is disposed in the upper tube 1100. The lifting rod 1320 is disposed in the upper tube 1100 and corresponds to the second end 1242 of the torsion spring 1240. The lifting rod 1320 is driven to rotate by the driving member 1310. The lifting rod 1320 moves from a first position to a second position along the longitudinal axis X1. When the lifting rod 1320 is positioned at the first position, the second end 1242 of the torsion spring 1240 and the first end 1241 are sandwiched by a first angle θ1. When the lifting rod 1320 moves to the second position, the second end 1242 of the torsion spring 1240 moves along the longitudinal axis X1 to sandwich a second angle θ2 with the first end 1241. The second angle θ2 is different from the first angle θ1, so as to change the preload of the torsion spring 1240. Thus, the second end 1242 of the torsion spring 1240 can be located at different positions through the lifting rod 1320 of the preload adjustment mechanism 1300 to change the preload force to suit different users and improve the convenience of use.

[0035] Specifically, when the second end 1242 of the torsion spring 1240 protrudes into the internal space, it can correspond to the end surface of the lifting rod 1320. Therefore, when the seat cushion applies pressure to rotate the multi-link structure relative to the upper tube 1100, the pressing arm 1210 will pivot relative to the pin 1260 to drive the first end 1241 of the torsion spring 1240 to tilt. At this time, the lifting rod 1320 is not affected and the end surface height is fixed, which will cause the first end 1241 to move closer to the second end 1242, and the torsion spring 1240 accumulates force, thereby producing a shock-absorbing effect. Conversely, when the pressure is removed, the torsion spring 1240 provides a reset force to reset the pressing arm 1210.

[0036] The preload adjustment mechanism 1300 is used to adjust the position of the second end 1242, so as to increase or decrease the preload of the torsion spring 1240, so as to adjust the hardness of the torsion spring 1240 (ie, the hardness of the shock absorber). Figure 2 and Figure 3 As shown, the upper tube 1100 may further include a convex ring 1150, which protrudes from the tube wall 1110 toward the internal space and includes an inner screw hole (not shown), which is connected to the internal space and is threaded with the lifting rod 1320. In other words, the inner diameter of the tube wall 1110 can be changed to form a convex ring 1150 that protrudes inward relative to the inner surface of the tube wall 1110 and can be threaded with the lifting rod 1320. The driving member 1310 of the preload adjustment mechanism 1300 can be rotatably supported on the convex ring 1150 and can include a central through hole 1312 and two guide blocks 1311. The central through hole 1312 is connected to the inner screw hole and is provided for the lifting rod 1320 to be lifted and lowered. The two guide blocks 1311 are symmetrically arranged at the central through hole 1312 and protrude into the two guide grooves 1321 of the lifting rod 1320 respectively.

[0037] Specifically, the driving member 1310 may further include a ring body 1313, the ring body 1313 is in a disc shape, and the central through hole 1312 passes through the ring body 1313 along the longitudinal axis X1. Therefore, when the ring body 1313 is disposed on the upper side of the convex ring 1150 and bears against the convex ring 1150, the central through hole 1312 can be aligned with the inner screw hole, so the lifting rod 1320 can be locked in the inner screw hole and pass through the central through hole 1312 at the same time. The extension direction of the two guide grooves 1321 of the lifting rod 1320 is parallel to the longitudinal axis X1, and the two guide grooves 1321 are symmetrically recessed on the outer surface of the lifting rod 1320. The two guide blocks 1311 of the driving member 1310 are respectively protruded from the hole wall of the central through hole 1312, so when the lifting rod 1320 passes through the central through hole 1312, each guide block 1311 can protrude into each guide groove 1321. The driving member 1310 may include a plurality of recesses 1314, and the recesses 1314 may be disposed around the outer circumference of the ring body 1313. Moreover, the preload adjustment mechanism 1300 may further include two bushings 1330, which are respectively disposed on the top and bottom ends of the driving member 1310, but the present invention is not limited thereto.

[0038] like Figure 2 and Figure 3 As shown, the preload adjustment mechanism 1300 may further include an elastic buckle 1340, and the upper tube 1100 may further include an inner groove 1140 recessed in the tube wall 1110, and the elastic buckle 1340 is engaged with the inner groove 1140, so that the driving member 1310 is limited between the elastic buckle 1340 and the convex ring 1150. The elastic buckle 1340 may be a C-shaped buckle structure, which is elastically and detachably engaged with the inner groove 1140, so as to limit the driving member 1310 on the longitudinal axis X1 to prevent it from falling out.

[0039] In addition, the upper tube 1100 may further include a radial through hole 1120, which penetrates the tube wall 1110 and can communicate with the internal space. After the driving member 1310 is assembled in the internal space, it can be aligned with the radial through hole 1120. In this way, the user can take a tool, insert the tool through the radial through hole 1120 to the recess 1314, and drive the driving member 1310 to rotate around the longitudinal axis X1, so as to drive the lifting rod 1320 to rise and fall along the guide block 1311 relative to the inner screw hole.

[0040] Therefore, the driving member 1310 can be driven to rotate by the tool, and the lifting rod 1320 can be rotated in conjunction with the locking relationship between the guide groove 1321 and the guide block 1311, and the lifting rod 1320 can be lifted and lowered through the screw connection relationship between the lifting rod 1320 and the inner screw hole. Figure 3 The first position rose to Figure 4 and decreases from the first angle θ1 to the second angle θ2 to increase the preload of the torsion spring 1240 .

[0041] See also Figure 5 and Figure 6 ,in Figure 5 FIG. 2 is a side view of a bicycle 2000 according to another embodiment of the present invention. Figure 6 To illustrate Figure 5 Schematic diagram of shock absorption of a seat cushion 2300 of a bicycle 2000 of an embodiment. The bicycle 2000 includes a frame 2100, two wheels 2400, and a seat post structure 2200. The two wheels 2400 are disposed on the frame 2100, and the seat post structure 2200 is disposed on the frame 2100. Further, the bicycle 2000 may include a seat cushion 2300 disposed on the seat post structure 2200, and the seat post structure 2200 may be connected to the frame 2100. Figures 1 to 4 The seat post structure 1000 of the embodiment is similar and the details are not repeated here. Figure 6 As shown, the seat rod structure 2200 includes an upper tube 2210 and a shock absorbing mechanism 2220. The shock absorbing mechanism 2220 is pivotally mounted on the upper tube 2210. Therefore, when the seat cushion 2300 applies pressure, the shock absorbing mechanism 2220 can be rotated clockwise to make the torsion spring (not shown) Figure 5 and Figure 6 (illustrated in the embodiment) deformation and energy storage to produce a shock-absorbing effect.

[0042] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the attached claims.

[0043]

Explanation of symbols

[0044] 1000,2200: Seatpost structure

[0045] 1100,2210: Upper tube

[0046] 1110: Tube wall

[0047] 1120: Radial perforation

[0048] 1130: Setting Department

[0049] 1140: Internal card slot

[0050] 1150:convex ring

[0051] 1200,2220: shock absorber

[0052] 1210: Pressing arm

[0053] 1211: Upper Hub

[0054] 1212:Lower axis

[0055] 1213:Plate body

[0056] 1220: Linked arm

[0057] 1230: Setting the rod

[0058] 1231: Rod body

[0059] 1232: Second dentition

[0060] 1233:convex part

[0061] 1240: Torsion spring

[0062] 1241: First End

[0063] 1242: Second End

[0064] 1250: shock absorber

[0065] 1251: Groove

[0066] 1260: Pin

[0067] 1270: Seat pivot

[0068] 1271: Pivot plate

[0069] 1272: First dentition

[0070] 1300: Preload adjustment mechanism

[0071] 1310: Driving parts

[0072] 1311: Guide block

[0073] 1312: Center perforation

[0074] 1313: Ring

[0075] 1314: concave part

[0076] 1320: Lifting rod

[0077] 1321:Guide groove

[0078] 1330:Bushing

[0079] 1340: Elastic buckle

[0080] 2000: Bicycle

[0081] 2100: Frame

[0082] 2300: Seat cushion

[0083] 2400:Wheels

[0084] X1: longitudinal axis

[0085] θ1: first angle

[0086] θ2: second angle.

Claims

1. A seat post structure, characterized in that: Include: a top tube having a longitudinal axis; and The shock absorbing mechanism is pivotally connected between the upper end of the upper tube and the seat cushion, and the shock absorbing mechanism comprises: a pressing arm for rotating relative to the upper tube; and A torsion spring, comprising a first end and a second end, wherein the first end corresponds to the pressing arm; When the seat cushion applies pressure to the shock-absorbing mechanism, the pressing arm drives the first end to rotate relative to the second end.

2. The seat post structure according to claim 1, characterized in that: Also included is a preload adjustment mechanism, which includes: A driving member is disposed in the upper tube; and A lifting rod is disposed in the upper tube and corresponds to the second end of the torsion spring, and the lifting rod is driven to rotate by the driving member; The lifting rod moves from a first position to a second position along the longitudinal axis. When the lifting rod is positioned at the first position, the second end of the torsion spring and the first end are clamped at a first angle. When the lifting rod moves to the second position, the second end of the torsion spring moves along the longitudinal axis and clamps a second angle with the first end. The second angle is different from the first angle to change the preload of the torsion spring.

3. The seat post structure according to claim 2, characterized in that: The shock-absorbing mechanism also includes: A linkage arm, pivotally connected to the upper end of the upper tube and facing the pressing arm; A setting rod is pivotally connected between the linkage arm and the pressing arm to form a multi-link structure and a shock-absorbing space with the linkage arm and the pressing arm, and the setting rod is pivotally connected to the seat cushion; and A shock-absorbing body is arranged in the shock-absorbing space; When the seat cushion applies the pressure to the shock-absorbing mechanism, the multi-link structure rotates relative to the upper tube.

4. The seat post structure according to claim 3, characterized in that: The top tube includes: a tube wall surrounding the inner space; and The convex ring protrudes from the tube wall toward the inner space and includes an inner screw hole, which is communicated with the inner space and is threadedly connected to the lifting rod.

5. The seat post structure according to claim 4, characterized in that: The driving member is rotatably supported on the convex ring and comprises: A central through hole, connected to the inner screw hole and allowing the lifting rod to pass therethrough so as to be able to be lifted and lowered; and Two guide blocks are symmetrically arranged on the central through hole and respectively protrude into the two guide grooves of the lifting rod.

6. The seat post structure according to claim 5, characterized in that: The preload adjustment mechanism further comprises an elastic buckle ring, and the upper tube further comprises an inner groove recessed in the tube wall, and the elastic buckle ring is engaged with the inner groove, so that the driving member is limited between the elastic buckle ring and the convex ring.

7. The seat post structure according to claim 6, characterized in that: The preload adjustment mechanism further comprises two bushings, which are respectively sleeved on the top end and the bottom end of the driving member.

8. The seat post structure according to claim 5, characterized in that: The upper tube also includes a radial through hole, which passes through the tube wall. The driving member includes a plurality of recesses. A tool passes through the radial through hole to be inserted into the recess and drives the driving member to rotate around the longitudinal axis to drive the lifting rod to rise and fall along the two guide blocks relative to the inner screw hole.

9. A bicycle, characterized in that: Include: Frame; wheels, disposed on the frame; and The seat post structure as claimed in claim 1 is arranged on the bicycle frame.

10. The bicycle according to claim 9, characterized in that The seat post structure also includes a preload adjustment mechanism, which includes: A driving member is disposed in the upper tube; and A lifting rod is disposed in the upper tube and corresponds to the second end of the torsion spring, and the lifting rod is driven to rotate by the driving member; The lifting rod moves from a first position to a second position along the longitudinal axis. When the lifting rod is positioned at the first position, the second end of the torsion spring and the first end are clamped at a first angle. When the lifting rod moves to the second position, the second end of the torsion spring moves along the longitudinal axis and clamps a second angle with the first end. The second angle is different from the first angle to change the preload of the torsion spring.

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