TWI805165B - Bicycle seat post structure and bicycle - Google Patents

Abstract

The present disclosure provides a bicycle seat post structure including a lower tube, an upper tube and a stroke restricting mechanism. The upper tube is movably disposed in the lower tube and can be positioned in a top stroke position or a bottom stroke position relative to the lower tube. The upper tube has an upper tube axis and includes an upper end, a lower end and an outer tube surface. The lower end is configured to be inserted into the lower tube. The outer tube surface is extended between the upper end and the lower end, the outer tube surface includes at least one interference section, and a distance between the at least one interference section and the upper tube axis is incrementally decreased toward the upper end. The stroke restricting mechanism includes an interference member, and the interference member includes an inner surface corresponding to the outer tube surface. The stroke restricting mechanism is operated to allow the inner surface and the at least one interference section of the outer tube surface to be switched from a first interference position to a second interference position to adjust the top stroke position. Therefore the using convenience can be increased.

Description

Bicycle seat post structure and bicycle

The invention relates to a bicycle seat post structure and a bicycle, and in particular to a height-adjustable bicycle seat post structure and a bicycle.

Generally speaking, a bicycle has a seat post installed on the middle tube, and the seat post is used for setting the seat cushion, and the height of the seat cushion can be adjusted through the relative movement of the seat post and the middle tube.

In addition, the seat post can include an upper tube and a lower tube, and a height adjustment mechanism can be further provided in the upper tube and the lower tube. The height adjustment mechanism can include a tube body, and the inside of the tube body is equipped with air, oil body or oil gas. , and a piston and a valve are set to change the relative position of the piston in the tube body, thereby changing the relative height of the upper tube and the lower tube. Among them, when the user wants to lower the height of the seat post, open the valve and press down on the upper tube so that the upper tube is lowered relative to the lower tube; The upper tube rises relative to the lower tube, and then the user limits the upper tube with his hands or body parts so that the upper tube rises to a predetermined height, and if the user does not limit the upper tube, the upper tube will rise to the highest point . Like this, still have its inconvenience in use.

Therefore, how to solve this problem has become the goal of relevant industry players.

In order to solve the above problems, the present invention provides a bicycle seat post structure and a bicycle, through which the displaceable stroke of the upper tube can be controlled through structural configuration.

A bicycle seatpost structure according to an embodiment of the present invention includes a lower tube, an upper tube, and a stroke limiting mechanism. The upper tube is movably inserted into the lower tube and is positioned at a stroke high point or a stroke low point relative to the down tube. The upper tube has an upper tube axis and includes an upper end, a lower end and an outer tube wall. The lower end is used for inserting the lower tube, the outer tube wall extends between the upper end and the lower end, and the outer tube wall includes at least one interference section, the radial distance between the at least one interference section and the axis of the upper tube is tapered toward the upper end. The stroke limiting mechanism includes an interference piece, and the interference piece includes an inner surface corresponding to the outer tube wall. Wherein, operating the stroke limit mechanism switches the aforementioned at least one interference section between the inner surface and the outer pipe wall from a first interference position to a second interference position, so as to adjust the stroke height.

According to the structure of the bicycle seat post in the aforementioned embodiments, the travel limiting mechanism may further include a nut, an adjusting ring, and a wedge sleeve. The nut is arranged on an insertion end of the lower tube, the adjustment ring is movably located in the nut, the wedge-shaped sleeve is located in the nut and is sleeved on the outer tube wall of the upper tube, one end of the wedge-shaped sleeve is connected to the adjustment ring and includes an inner slope, and The inner diameter of the inner bevel tapers toward the adjustment ring. Among them, the interference piece is sleeved on the outer tube wall of the upper tube, the interference piece is tapered and used to be inserted between the inner slope of the wedge-shaped sleeve and the outer tube wall of the upper tube, and the adjustment ring is turned to move the wedge-shaped sleeve down to tighten the interference piece. To reduce the inner diameter of the interference part.

According to the bicycle seat post structure of the aforementioned embodiment, wherein, the adjustment ring may include at least one driving hole, and the nut may include a through hole, the through hole corresponds to the aforementioned at least one driving hole and provides an adjustment space for the aforementioned at least one driving hole to be adjusted One side of the space moves to the other.

According to the bicycle seat post structure of the above-mentioned embodiment, wherein, the stroke limiting mechanism may further include a fixed cover, the fixed cover includes two pins, the number of the at least one driving hole is plural, and the fixed cover is set in the through hole and allows the two pins to be inserted Two drive holes.

According to the bicycle seatpost structure of the aforementioned embodiments, the stroke limiting mechanism may further include a nut and an adjusting ring. The nut is arranged on an insertion end of the lower tube, and the adjusting ring includes a rotating part and a wedge part. The rotating part is movably exposed to the nut. The wedge-shaped part is movably located in the nut and locked with the nut. One end of the wedge-shaped part is connected to the rotating part and includes an inner bevel, and the inner diameter of the inner bevel is tapered toward the rotating part. Wherein, the interference piece is sleeved on the outer tube wall of the upper tube, and the interference piece is tapered and used to be inserted between the inner inclined surface of the wedge-shaped part and the outer tube wall of the upper tube, and the rotating part is rotated so that the wedge-shaped part moves down and presses the interference piece tightly. Reduce the inner diameter of the interference part.

According to the structure of the bicycle seatpost in the aforementioned embodiment, an oil seal can be further included, which is sheathed on the outer tube wall of the upper tube and arranged on the rotating part so as to be linked with the rotating part.

According to the bicycle seat post structure of the above-mentioned embodiment, the interfering member may include a groove, so that a cross section of the interfering member is roughly C-shaped.

According to the bicycle seatpost structure of the aforementioned embodiment, the stroke limiting mechanism may further include a nut disposed on an insertion end of the down tube. Wherein, the interference member is rotatably located in the nut and sleeved on the outer pipe wall of the upper pipe, and an outer surface of the interference member surrounds an outer eccentric circle, and an inner surface surrounds an inner eccentric circle, and the center of the outer eccentric circle , the center of the inner eccentric circle and the axis of the upper tube do not overlap.

According to the bicycle seatpost structure of the aforementioned embodiment, the aforementioned at least one interference section may be in the shape of a slope or a trapezoid with a wide bottom and a narrow top.

A bicycle according to another embodiment of the present invention includes a frame, two wheels, and the seat post structure of the bicycle in the above embodiment, and the down tube of the seat post structure is disposed on the middle tube.

Embodiments of the present invention will be described below with reference to the drawings. For the sake of clarity, many practical details are included in the following narrative. 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 unnecessary. In addition, for the sake of simplifying the drawings, some well-known and commonly used structures and elements will be shown in a simple and schematic manner in the drawings; and repeated elements may be represented by the same or similar numbers.

In addition, terms such as first, second, and third in this article are only used to describe different elements or components, and there is no limitation on the elements/components themselves. Therefore, the first element/component can also be renamed as the second element/component . And the combination of components/components/mechanisms/modules in this article is not a combination that is generally known, conventional or conventional in this field, and whether the component/components/mechanism/module itself is known or not can not be used to determine whether the combination relationship is Easily accomplished by persons of ordinary knowledge in the technical field.

Please refer to FIG. 1, FIG. 2 and FIG. 3, wherein FIG. 1 shows a perspective view of a bicycle seat post structure 100 according to the first embodiment of the present invention, and FIG. 2 shows the first embodiment of FIG. 1 Fig. 3 is a schematic exploded view of the bicycle seat post structure 100 of the bicycle seat post structure 100 of the first embodiment shown in Fig. 1 . The bicycle seatpost structure 100 includes a lower tube 120 , an upper tube 110 and a stroke limiting mechanism 130 . The upper tube 110 is movably inserted in the lower tube 120, and is positioned at a stroke high point or a stroke low point relative to the down tube 120. The upper tube 110 has an upper tube axis (not marked in the first embodiment) and includes a An upper end 111 , a lower end 113 and an outer tube wall 112 . The lower end 113 is used to insert the lower tube 120, the outer tube wall 112 extends between the upper end 111 and the lower end 113, and the outer tube wall 112 includes at least one interference section 1121, the diameter between the aforementioned at least one interference section 1121 and the axis of the upper tube Tapers toward the upper end 111. The stroke limiting mechanism 130 includes an interference member 134 , and the interference member 134 includes an inner surface 1341 corresponding to the outer tube wall 112 . Wherein, operating the stroke limiting mechanism 130 switches the aforementioned at least one interference section 1121 between the inner surface 1341 and the outer tube wall 112 from a first interference position to a second interference position, so as to adjust the stroke height.

Thereby, since the outer tube wall 112 has a tapered interference section 1121, and the inner surface 1341 of the interference member 134 of the travel limit mechanism 130 can have different interference positions (for example, the first interference position and the second interference position ), so that the upper pipe 110 can stop rising due to interference when rising, thereby limiting the stroke height. In this way, the stroke height of the upper tube 110 can be adjusted by operating the stroke limiting mechanism 130 , which is convenient to use. Details of the bicycle seatpost structure 100 will be described later.

Both the upper tube 110 and the lower tube 120 have a hollow tube body structure, and the inner tube wall of the upper tube 110 and the inner tube surface of the lower tube 120 are both straight, and the upper tube 110 is inserted behind the lower tube 120, the two The interior is connected to form a space. During the manufacturing process of the upper tube 110, only the outer diameter of the middle part may gradually change to form a tapered interference section 1121, but in other embodiments, the outer diameter of the upper half of the upper tube may also be gradually changed, and only The outer diameter of the lower part is a constant value, or only a part of the upper tube is inclined to form a non-tapered and inclined interference section. The interference section can be slope-shaped or trapezoidal with a wide bottom and a narrow top, or an interference area The number of segments is plural, but this does not limit the present invention.

The bicycle seat post structure 100 may further include a height adjustment mechanism. The height adjustment mechanism includes an actuation rod, a pipe body, a valve and a piston. The pipe body contains fluid, and the actuation rod extends into the pipe body. The actuation rod can open the valve. The relative displacement of the upper pipe 110 and the lower pipe 120 can be caused by the fluid flowing relative to the piston, so that the upper pipe 110 can be raised to a stroke high point or dropped to a stroke low point. This kind of height adjustment mechanism is known and not included in the present invention. Important, so it is not shown in the drawings and the details will not be repeated. The height adjustment mechanism can be driven by a rope or an electric control unit, and the motor can be activated through a wireless or wired signal, and the effect of pushing the actuating rod up to open the valve can also be achieved.

Please refer to FIG. 4 , and refer to FIG. 2 to FIG. 3 in conjunction with FIG. 4 , wherein FIG. 4 shows another part of the side cross-sectional schematic diagram of the bicycle seat post structure 100 of the first embodiment in FIG. 1 . The stroke limiting mechanism 130 may further include a nut 132 , an adjusting ring 131 and a wedge sleeve 133 . The nut 132 is arranged on an insertion end of the lower tube 120, the adjusting ring 131 is movably located in the nut 132, the wedge-shaped sleeve 133 is located in the nut 132 and sleeved on the outer tube wall 112 of the upper tube 110, and one end of the wedge-shaped sleeve 133 is connected to The adjustment ring 131 also includes an inner slope 1331 , and the inner diameter of the inner slope 1331 is tapered toward the adjustment ring 131 . Wherein, the interference piece 134 is sleeved on the outer tube wall 112 of the upper tube 110, the interference piece 134 is tapered and used to be inserted between the inner slope 1331 of the wedge-shaped sleeve 133 and the outer tube wall 112 of the upper tube 110, and the adjusting ring 131 is rotated to make The wedge sleeve 133 moves down and tightens the interference member 134 to reduce the inner diameter of the interference member 134 .

As shown in Figures 2 and 3, the lower end of the nut 132 is sleeved on the outside of the insertion end of the lower tube 120 and screwed with the lower tube 120, and the upper end of the nut 132 can be connected to an oil seal 140 of the bicycle seat post structure 100 , and the oil seal 140 is against the outer tube wall 112 of the upper tube 110 . The adjusting ring 131 is locked with the inner thread of the nut 132, and the interference member 134 is in the shape of a cone with an outer diameter that is wide at the bottom and narrow at the top, so that the interference member 134 includes an outer surface 1342, which is used to correspond to the inner slope 1331 of the wedge-shaped sleeve 133 , and the interference member 134 is located between the inner tube surface of the lower tube 120 and the outer tube wall 112 of the upper tube 110 . Further, the interference member 134 may include a groove 1343 , so that a cross section of the interference member 134 is roughly C-shaped, and the extension line of the groove 1343 is not parallel to the upper tube axis of the upper tube 110 but is inclined.

Therefore, in terms of structural configuration, the end of the wedge-shaped sleeve 133 away from the adjustment ring 131 is inserted between the inner tube surface of the lower tube 120 and the outer surface 1342 of the interference piece 134, so that the interference piece 134 can be pressed against the inner surface through shape fit. Shrink effect.

Also, the adjusting ring 131 is locked with the inner thread of the nut 132, and the adjusting ring 131 can include at least one driving hole 1311, and the nut 132 includes a through hole 1321, the through hole 1321 corresponds to the aforementioned at least one driving hole 1311 and provides an adjustment space for the aforementioned at least one driving hole 1311 to move from one side of the adjustment space to the other side. Specifically, the through hole 1321 can be in the shape of a horizontal long ellipse, which can provide an adjustment space, and the number of the at least one driving hole 1311 can be plural and arranged at intervals around it, so that the rotation range of the adjustment ring 131 can be increased. In addition, the stroke limiting mechanism 130 may further include a fixed cover 135 , and the fixed cover 135 may include two pins 1351 , and the fixed cover 135 is disposed in the through hole 1321 and allows the two pins 1351 to be inserted into the two driving holes 1311 . In this way, when the pin 1351 is inserted into the driving hole 1311 , the adjustment ring 131 is limited and cannot rotate relative to the nut 132 , thereby having a positioning effect.

As shown in Figure 3, the inner surface 1341 of the interference member 134 and the interference section 1121 of the outer tube wall 112 are in the first interference position, but please pay special attention to the fact that the upper tube 110 shown in Figure 3 has not risen to the corresponding The stroke high point of the first interference position, so there is still a gap between the interference section 1121 and the inner surface 1341, and it needs to be known that when the upper tube 110 rises to the stroke high point corresponding to the first interference position, the interference section 1121 and the inner surface Surfaces 1341 are at least partially free of gaps that can interfere. In operation, the user can remove the fixed cover 135 to expose the drive hole 1311, and then insert the drive hole 1311 through the perforation 1321 by hand or any tool to move the drive hole 1311 from one side of the adjustment space to the other. In this way, the adjustment ring 131 can be driven to rotate around the upper tube axis of the upper tube 110, so that the adjustment ring 131 can move down relative to the nut 132, and can drive the wedge sleeve 133 downward, so that the wedge sleeve 133 will tighten the interference piece 134 , the groove 1343 is narrowed, and the interference section 1121 between the inner surface 1341 of the interference member 134 and the outer tube wall 112 is switched to the second interference position, and the inner diameter of the inner surface 1341 of the interference member 134 becomes smaller, that is, The inner diameter D1 in FIG. 3 is reduced to the inner diameter D2 in FIG. 4 , and then the pin 1351 of the fixed cover 135 is inserted into the drive hole 1311 to position the adjustment ring 131 and limit the position of the interference member 134 .

Since the inner diameter D1 is larger than the inner diameter D2, the inner diameter D1 may eg correspond to the lower edge of the interfering section 1121 of the upper tube 110 , and the inner diameter D2 may eg correspond to the upper edge of the interfering section 1121 of the upper tube 110 . Therefore, when the inner surface 1341 of the interference member 134 and the interference section 1121 of the outer pipe wall 112 are in the first interference position as shown in FIG. 3 , the user operates the height adjustment mechanism without other external restrictions. Next, when the upper tube 110 rises to the lower edge of the interference section 1121, it will automatically stop due to interference, that is, the upper tube 110 corresponds to the stroke high point of the first interference position; When the interference section 1121 of the pipe wall 112 is in the second interference position as shown in FIG. The edge will automatically stop due to interference, that is, the upper tube 110 corresponds to the stroke high point of the second interference position. In this way, the user can set the preferred stroke height of the upper tube 110 through the stroke limiting mechanism 130 , which is convenient to use.

Please refer to Figures 5, 6, 7 and 8, wherein Figure 5 shows a perspective view of a bicycle seat post structure 200 according to the second embodiment of the present invention, and Figure 6 shows Figure 5 Exploded schematic diagram of the bicycle seat post structure 200 of the second embodiment, Fig. 7 shows a partial side view cross-sectional view of the bicycle seat post structure 200 of the second embodiment in Fig. 5, and Fig. 8 shows the second embodiment of Fig. 5 Another part of the side view of the bicycle seat post structure 200 is a schematic cross-sectional view. The bicycle seat post structure 200 is similar to the bicycle seat post structure 100 of the first embodiment and includes an upper tube 210 , a lower tube 220 and a stroke limiting mechanism 230 , but the structure of the stroke limiting mechanism 230 is different.

Specifically, the travel limit mechanism 230 may further include a nut 232 and an adjusting ring 231 . The nut 232 is disposed on an insertion end of the lower tube 220 , and the adjustment ring 231 includes a rotating portion 2311 and a wedge portion 2312 . The rotating part 2311 is exposed to the nut 232. The wedge-shaped part 2312 is movably located in the nut 232 and screwed with the nut 232. One end of the wedge-shaped part 2312 is connected to the rotating part 2311 and includes an inner slope (not marked in the second embodiment) , and the inner diameter of the inner slope is tapered toward the rotating portion 2311 . Wherein, the interference member 234 is tapered and is used to insert between the inner slope of the wedge-shaped part 2312 and the outer tube wall (not shown in the second embodiment) of the upper tube 210, and the rotating part 2311 of the adjustment ring 231 is rotated so that the wedge-shaped part 2312 moves downward. The interference member 234 is moved tightly to reduce the inner diameter of the interference member 234 .

The bicycle seatpost structure 200 may further include an oil seal 240 , which is sheathed on the outer tube wall of the upper tube 210 and disposed on the rotating part 2311 so as to be linked with the rotating part 2311 . The rotating part 2311 and the wedge-shaped part 2312 are similar to the adjustment ring 131 and the wedge-shaped sleeve 133 of the first embodiment, but the rotating part 2311 and the wedge-shaped part 2312 are integrally formed, and the wedge-shaped part 2312 is an internal thread locked on the nut 232, The oil seal 240 is arranged on the rotating part 2311 and moves up and down with the rotating part 2311 . In addition, the structure of the interference element 234 is the same as that of the interference element 134 in the first embodiment, and details will not be repeated here.

As shown in Figure 7, the inner surface of the interference member 234 (not marked in the second embodiment) and the interference section of the outer tube wall (not marked in the second embodiment) are in the first interference position, but please pay special attention to the first interference position The upper tube 210 shown in Figure 7 has not risen to the stroke high point corresponding to the first interference position, so there is still a gap between the interference section and the inner surface. At the high point of travel at the position, there is at least partially no clearance between the interfering section and the inner surface to allow interference. The user can directly rotate the rotating part 2311, and the wedge-shaped part 2312 can be moved downward, so that the wedge-shaped part 2312 is pressed against the interference part 234, and the interference section between the inner surface of the interference part 234 and the outer tube wall is switched to the second interference position , and make the inner diameter of the inner surface of the interference member 234 smaller, that is, shrink from the inner diameter D1 in FIG. 7 to the inner diameter D2 in FIG. 8, so as to adjust the stroke height of the upper tube 210.

Please refer to FIG. 9, FIG. 10 and FIG. 11, wherein FIG. 9 shows an exploded view of a bicycle seatpost structure 300 according to the third embodiment of the present invention, and FIG. 10 shows the third embodiment of FIG. 9 Fig. 11 shows another top sectional schematic view of the bicycle seatpost structure 300 of the third embodiment in Fig. 9. The bicycle seat post structure 300 is similar to the bicycle seat post structure 100 of the first embodiment and includes an upper tube 310 , a lower tube 320 and a stroke limiting mechanism 330 , but the structure of the stroke limiting mechanism 330 is different.

As shown in FIG. 9 to FIG. 11 , the stroke limiting mechanism 330 includes a nut 332 and an interference member 334 , and the nut 332 is disposed at an insertion end of the lower tube 320 . Wherein, the interference member 334 is rotatably located in the nut 332, and an outer surface 3342 of the interference member 334 surrounds an outer eccentric circle, and an inner surface 3341 surrounds an inner eccentric circle, the center C2 of the outer eccentric circle, the inner eccentric circle The center C1 of the circle and the upper tube axis C3 of the upper tube 310 do not overlap.

Specifically, the structure of the interference member 334 is similar to the adjustment ring 131 of the first embodiment, but the adjustment ring 131 of the first embodiment is an annular structure with no eccentricity inside and outside, so it needs to pass through the wedge-shaped sleeve 133 and the interference member 134. Press up and down to achieve the effect of stroke adjustment. The interference member 334 of the third embodiment is a double eccentric annular structure, which can make the radial thickness of the interference member 334 inconsistent and allow the interference member 334 to change the tube axis C3 on the upper tube 310 to interfere when the interference member 334 rotates in the nut 332. The minimum radius of the inner surface 3341 of the member 334, so that no other taper or slope elements are required. Accordingly, the travel limiting mechanism 330 may further include a bushing 337 that is not eccentric inside and outside, and the bushing 337 can be sleeved on the outer tube wall of the upper tube 310 (not shown in the third embodiment).

Therefore, as shown in FIG. 10, the inner surface 3341 of the interference member 334 and the interference section (not shown in the third embodiment) of the upper tube 310 are in the first interference position, and at this time, the upper tube axis C3 of the upper tube 310 reaches The minimum radius of the inner surface 3341 of the interference member 334 is R1. In operation, the user can remove the fixed cover 335, and then insert the driving hole (not shown in the third embodiment) of the interference member 334 by hand or any tool to rotate the interference member 334, so that the interference member 334 can rotate To the position shown in FIG. 11 , the minimum radius from the tube axis C3 on the upper tube 310 to the inner surface 3341 of the interference member 334 is R2, and the minimum radius R1 is greater than the minimum radius R2.

Since the minimum radius R1 is greater than the minimum radius R2, the minimum radius R1 may eg correspond to the lower edge of the upper tube 310 interference section and the minimum radius R2 may eg correspond to the upper edge of the upper tube 310 interference section. In this way, the user can set the preferred stroke height of the upper tube 310 through the stroke limiting mechanism 330 , which is convenient to use.

Please refer to FIG. 12 , wherein FIG. 12 shows a perspective view of a bicycle 400 according to the fourth embodiment of the present invention. Bicycle 400 comprises a vehicle frame (not shown), two wheels 430, a seat cushion 440 and a bicycle seat post structure 410, the vehicle frame comprises a middle tube 420, two wheels 430 are arranged on the vehicle frame, and the down tube of the bicycle seat post structure 410 (not shown in the fourth embodiment) is disposed on the middle tube 420 , and the structure of the bicycle seatpost structure 410 can be the same as any one of the bicycle seatpost structures 100 , 200 , 300 , and the details will not be repeated here.

Although the present invention has been disclosed as above with the embodiments, it is not intended to limit the present invention. Anyone skilled in this art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be defined by the appended patent application scope.

100, 200, 300, 410: bicycle seat post structure 110,210,310: upper tube 111: upper end 112: Outer pipe wall 1121: Interference section 113: lower end 120,220,320: down tube 130,230,330: travel limit mechanism 131,231: Adjustment ring 1311: drive hole 132,232,332: Nuts 1321: perforation 133: wedge sleeve 1331: inner bevel 134,234,334: interference parts 1341, 3341: inner surface 1342, 3342: external surface 1343: Groove 135,335: fixed cover 1351: Latch 140,240: oil seal 2311: rotating part 2312: Wedge 337: Bushing 400: Bicycle 420: middle tube 430: wheel 440: Cushion C1, C2: center of circle C3: Upper tube axis D1, D2: inner diameter R1, R2: minimum radius

Figure 1 shows a three-dimensional schematic view of a bicycle seatpost structure according to the first embodiment of the present invention; Figure 2 shows an exploded view of the structure of the bicycle seat post in the first embodiment of Figure 1; Fig. 3 shows a partial side sectional view of the bicycle seatpost structure of the first embodiment in Fig. 1; Figure 4 shows another part of the side view of the bicycle seat post structure of the first embodiment in Figure 1; Fig. 5 shows a three-dimensional schematic diagram of a bicycle seat post structure according to the second embodiment of the present invention; Fig. 6 shows an exploded view of the structure of the bicycle seat post in the second embodiment of Fig. 5; Fig. 7 shows a partial side view cross-sectional view of the bicycle seatpost structure of the second embodiment in Fig. 5; Fig. 8 shows another part of the side view cross-sectional schematic diagram of the bicycle seatpost structure of the second embodiment in Fig. 5; Fig. 9 shows an exploded view of a bicycle seatpost structure according to the third embodiment of the present invention; Fig. 10 shows a schematic cross-sectional top view of the bicycle seatpost structure of the third embodiment in Fig. 9; Fig. 11 shows another schematic cross-sectional top view of the bicycle seatpost structure of the third embodiment in Fig. 9; and FIG. 12 is a schematic perspective view of a bicycle according to a fourth embodiment of the present invention.

100: Bicycle Seatpost Structure

110: top tube

111: upper end

112: Outer pipe wall

1121: Interference section

113: lower end

120: down tube

130: travel limit mechanism

131: Adjustment ring

1311: drive hole

132: Nut

1321: perforation

133: wedge sleeve

1331: inner bevel

134: Interference parts

1341: inner surface

1342: outer surface

1343: Groove

135: fixed cover

1351: Latch

140: oil seal

Claims (9)

A bicycle seat post structure, comprising: a lower tube; an upper tube movably inserted in the lower tube, and positioned at a stroke high point or a stroke low point relative to the down tube, the upper tube has an upper tube axis and It includes: an upper end; a lower end for inserting into the lower tube; and an outer tube wall extending between the upper end and the lower end, and the outer tube wall includes at least one interference section, and the at least one interference section and The radial distance between the axes of the upper tube tapers toward the upper end, and the at least one interference section is slope-shaped or trapezoidal with a wide bottom and a narrow top; and a travel limit mechanism, which includes an interference member, and the interference member includes an inner surface Corresponding to the outer pipe wall; wherein, operating the travel limit mechanism switches the at least one interference section between the inner surface and the outer pipe wall from a first interference position to a second interference position to adjust the stroke height . The bicycle seatpost structure as described in claim 1, wherein the stroke limiting mechanism further includes: a nut disposed at an insertion end of the down tube; an adjustment ring movably located in the nut; and a a wedge-shaped sleeve, located in the nut and sleeved on the outer tube wall of the upper tube, one end of the wedge-shaped sleeve is connected to the adjustment ring and includes an inner slope, and the inner diameter of the inner slope is tapered toward the adjustment ring; Wherein, the interfering piece is sheathed on the outer tube wall of the upper tube, the interfering piece is tapered and used to be inserted between the inner slope of the wedge-shaped sleeve and the outer tube wall of the upper tube, and the adjusting ring is rotated to The wedge-shaped sleeve moves down and presses the interference piece so as to reduce the inner diameter of the interference piece. The bicycle seatpost structure according to claim 2, wherein the adjusting ring includes at least one driving hole, and the nut includes a through hole corresponding to the at least one driving hole and providing an adjustment space for the at least one driving hole. The driving hole is moved from one side of the adjustment space to the other side. The bicycle seatpost structure as described in claim 3, wherein the stroke limiting mechanism further includes a fixed cover, the fixed cover includes two pins, the number of the at least one driving hole is plural, and the fixed cover is arranged on the through hole And make the two latches insert the two driving holes. The bicycle seatpost structure as described in Claim 1, wherein the stroke limiting mechanism further includes: a nut provided at an insertion end of the down tube; and an adjustment ring including: a rotating part movably exposed on the nut; and a wedge-shaped portion movably located in the nut and screwed with the nut, one end of the wedge-shaped portion is connected to the rotating portion and includes an inner bevel, and the inner diameter of the inner bevel is turned toward the The portion is tapered; wherein, the interference piece is sleeved on the outer tube wall of the upper tube, and the interference piece is in the form of Conical and used for inserting between the inner slope of the wedge and the outer wall of the upper tube, rotating the rotating part makes the wedge move down and press the interference part to reduce the inner diameter of the interference part. The bicycle seat post structure as described in claim 5 further includes: an oil seal sleeved on the outer tube wall of the upper tube and arranged on the rotating part so as to be linked with the rotating part. The bicycle seatpost structure as claimed in claim 5, wherein the interfering member further includes a groove, so that a cross section of the interfering member is roughly C-shaped. The bicycle seat post structure as claimed in claim 1, wherein the stroke limiting mechanism further includes: a nut disposed at an insertion end of the down tube; wherein the interference member is rotatably located in the nut and Sleeved on the outer pipe wall of the upper pipe, and an outer surface of the interference member surrounds an outer eccentric circle, and the inner surface surrounds an inner eccentric circle, the center of the outer eccentric circle and the center of the inner eccentric circle The three do not overlap with the axis of the upper tube. A bicycle, comprising: a frame, including a middle tube; two wheels, arranged on the frame; and a bicycle seatpost structure according to any one of claims 1 to 8, and The lower tube of the bicycle seat post structure is disposed on the middle tube.

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