TWI808861B - bike dropper post - Google Patents

Abstract

A bicycle lifting seat tube includes a fixed tube, a length adjusting device, and an actuating device. Wherein the length adjustment device has a cylinder body, a telescopic rod and an actuating pin rod, when the actuating pin rod moves from a first position to a second position, it can drive the telescopic rod to reciprocate along the axial direction of the cylinder body; Simultaneously, the actuating pin rod is pushed away, and the actuating pin rod moves to the second position, so that the telescopic rod can move on the cylinder body, so as to achieve the purpose of controlling the lifting of the bicycle dropper seat tube.

Description

bike dropper post

The invention is related to the lifting and lowering of the seat tube of a bicycle; in particular, it refers to an actuating device for lifting and lowering the seat tube of a bicycle.

The structure of the known bicycle lifter seat tube includes an inner tube, an outer tube and a length adjustment device; the outer tube is fixed on a bicycle frame; one end of the inner tube is arranged inside the outer tube, and the other end protrudes from the outer tube and is connected with a seat cushion; the length adjustment device is arranged in the inner tube and the outer tube. The user can drive an actuating device by controlling a switch, and drive an actuating pin of the length adjusting device to generate an actuating relationship, so that the inner tube can be relatively displaced along the outer tube; when the user sits on the seat cushion, the pressure exerted by the user on the seat cushion and the actuating relationship of the actuating pin of the length adjusting device can be used to adjust the inner tube to a proper position and then fix it.

Most of the existing actuating devices that can drive the actuating pin to actuate are driven by a pull cord to drive the connecting rod, a pull cord combined with an outer casing, or an actuating device that drives the sliding block to push the actuating pin rod by the pull cord, so that the inner tube can be stretched or shortened relative to the outer tube and fixed.

In view of this, the object of the present invention is to provide a bicycle dropper seat tube, mainly in the improvement of the actuating device, so as to simplify the internal components of the actuating device, so that it can actuate more stably and smoothly.

In order to achieve the above object, the present invention provides a bicycle seat tube that includes a fixed tube, a length adjusting device and an actuating device, wherein the length adjusting device has a cylinder, a telescopic rod and an actuating pin, wherein the telescopic rod is partially located in the cylinder and partially protruded outside, and can reciprocate relative to the cylinder along the axial direction of the cylinder; the actuating pin has an exposed portion; the actuating pin can reciprocate between a first position and a second position, and when in the first position, The telescopic rod cannot move on the cylinder body, but in the second position, the telescopic rod can move on the cylinder body; the length adjustment device is arranged on the fixed pipe, one of the cylinder body or the telescopic rod is fixed in the fixed pipe, and the other stretches out of the fixed pipe; When the fourth position pivots, push the exposed part of the actuating pin to move the actuating pin to the second position; in addition, the actuating member has a first contact portion; the sliding member is connected to the pull cord and has a second contacting portion abutting against the first contacting portion; when the pull cord is pulled, the sliding member slides from a fifth position of the first contacting portion to a sixth position on the first contacting portion, and when the sliding member slides to the sixth position, the actuating member pivots to the fourth position.

The effect of the present invention is that, by pivoting the actuator from the third position to the fourth position, the actuator pushes up the actuator pin, so that the telescopic rod can move on the cylinder body in a simple and stable manner.

〔this invention〕

1: Bicycle dropper seat tube

10: fixed tube

12: tube body

12a: Internal thread

14: Pivot seat

14a: external thread

14b: Through hole

142: arm

144: bridge part

144a: Perforation

16: Pivot

18: Limit axis

20: Length adjustment device

22: Cylinder

24: telescopic rod

26: Actuating pin rod

26a: exposed part

30: Actuating device

32:Actuator

322: part one

322a: Concave

324: part two

324a: first contact portion

324b: long hole

34: Drawstring

36: Slider

362: Ontology

364: friction parts

364a: second contact portion

38: Casing

Fig. 1 is a schematic diagram of a bicycle dropper seat post according to a preferred embodiment of the present invention.

Fig. 2 is a perspective view of a bicycle dropper seat tube according to a preferred embodiment of the present invention.

Fig. 3 is a perspective view of a bicycle dropper seat tube according to a preferred embodiment of the present invention.

Fig. 4 is an exploded view of the embodiment shown in Fig. 3 .

Fig. 5 is a perspective view of the structural arrangement of the actuator pushing the actuator pin in the embodiment shown.

Fig. 6 is a perspective view of the structural arrangement of the actuating pin against the actuating member in the embodiment shown.

In order to illustrate the present invention more clearly, preferred embodiments are given and detailed descriptions are given below in conjunction with drawings. Please refer to Fig. 1 to Fig. 4, which is a bicycle dropper seat tube 1 according to a preferred embodiment of the present invention. The bicycle dropper seat tube 1 includes a fixed tube 10, a length adjustment device 20 and an actuating device 30 respectively connected with the fixed tube 10.

The fixed pipe 10 includes a pipe body 12 and a pivot seat 14. The pipe body 12 has an upper end and a lower end opposite to each other. The inner edge of the lower end has an internal thread 12a and an external thread 14a of the pivot seat 14 to be detachably combined and fixed; wherein, the pivot seat 14 has a through hole 14b which can communicate with the interior of the pipe body 12. In this embodiment, the pivot seat 14 has a pair of parallel and symmetrical arms 142, and connecting A bridging portion 144 of the two arm portions 142, wherein the bridging portion 144 has a through hole 144a.

The length adjusting device 20 can be a generally commercially available pneumatic, hydraulic or electric telescopic rod. In this embodiment, an air telescopic rod is taken as an example, which is mainly composed of a cylinder 22, a telescopic rod 24, a piston (not shown) and an actuating pin 26. The cylinder body 22 can relatively move along the axial direction of the fixed pipe 10, a part of the cylinder body 22 passes through the fixed pipe 10, and the other part is located outside the fixed pipe 10; The piston is combined on the telescopic rod 24 and is located in the cylinder 22, and the cylinder 22 is divided into two spaces; The actuating pin 26 has an exposed portion 26a (shown in FIG. 5 ) that is exposed on the telescopic rod 24, and the exposed portion 26a also protrudes outside the through hole 14b of the pivot seat 14. By pushing the exposed portion 26a, the actuating pin 26 can move back and forth between a first position and a second position; When going up, the valve part leaves the valve port, so that the telescopic rod 24 can move on the cylinder body 22 . Because the pneumatic telescopic rod described here is known, its structure is just no longer described in detail.

The actuating device 30 includes an actuating member 32, a pull cord 34, a sliding member 36, and a sleeve 38. In this embodiment, the actuating member 32 is pivotally connected to the pivot base 14 through a pivot 16, and is located between the two arm portions 142; In addition, to prevent the actuating member 32 from being out of a predetermined range of the pivot base 14 due to excessive pivoting, and to prevent the actuating member 32 from being in contact with the actuating pin 26 . Therefore, the pivot base 14 is provided with a limiting shaft 18 , the two ends of the limiting shaft 18 are connected to the two arm portions 142 , and it is used to limit the pivoting range of the actuator 32 to the predetermined range of the pivot base 14 .

The actuator 32 has a first portion 322 and a second portion 324 that form a predetermined angle with each other. The predetermined angle is determined by the pivot angle of the actuator 32. In this embodiment, the predetermined angle is less than 90 degrees, but in other implementations, the predetermined angle can also be greater than 90 degrees. In addition, the first portion 322 and the second portion 324 are integrally formed, but in other embodiments, the first portion 322 and the second portion 324 It can also be two components combined. Wherein, as shown in FIG. 5 , the first portion 322 has a concave hole 322a where it abuts against the exposed portion 26a of the actuation pin 26; the second portion 324 has a first contact portion 324a, and has a long hole 324b on the first contact portion 324a.

The stay cord 34 is connected to the slider 36 and passed through the elongated hole 324b of the actuator 32 and the perforation 144a of the bridging portion 144, wherein, as shown in FIG. 4. When pulled by an external force, the slider 36 can be driven to displace along the elongated hole 324b; when the pull cord 34 is pulled, the slider 36 as a whole moves along the pulling direction of the pull cord 34.

In addition, as shown in FIG. 5 , the sliding member 36 includes a body 362 and a friction member 364; the body 362 is connected to the pull cord 34; a friction force. In other implementations, the body 362 and the friction member 364 can also be integrally formed.

In order to further understand the structural features, technical means and expected effects of the present invention, the usage of the present invention is described as follows.

When the bicycle lifter seat tube 1 of the present embodiment is in use, its fixed pipe 10 is inserted in a bicycle standpipe, and a bicycle seat cushion is installed on the free end of its cylinder body 22 for the user to ride on (not shown). To adjust the bicycle seat tube 1, as shown in FIG. 5 , the pull cord 34 is given a pulling force, and drives the slider 36 to slide from a fifth position of the first contact portion 324a to a sixth position of the first contact portion 324a, and the sliding between the first contact portion 324a and the second contact portion 364a is generated between the slider 36 and the actuator 32, and the actuator 32 is driven to pivot from a third position to a fourth position. The actuator 32 is During the pivoting process, the concave hole 322a will push up the exposed portion 26a of the actuating pin 26, so that the actuating pin 26 is located at the second position, that is, the telescopic rod 24 can move on the cylinder 22, so the cylinder 22 can be retracted inwardly into the fixed tube 10, or can be stretched upward relative to the fixed tube 10. Wherein, the arrangement relationship between the inner wall of the concave hole 322a and the exposed portion 26a is to improve the stability and smoothness of the actuator 32 when pushing.

After the adjustment of the bicycle lifter seat tube 1 is completed, as shown in FIG. 6 , the pulling force of the pull cord 34 is released, and the actuating pin 26 is released downward from the second position to the first position through elastic recovery, and pushes against the actuating member 32, so that the actuating member 32 pivots from the fourth position to the third position, and drives the sliding member 36 to move to the fifth position. At this time, the actuating pin 26 is located at the first position, so that the telescopic rod 24 cannot move on the cylinder 22, that is, the cylinder 22 is locked and positioned on the fixed tube 10, so as to achieve the purpose of adjusting the height of the bicycle lifter tube 1 and fixing it.

The above description is only a preferred feasible embodiment of the present invention, and all equivalent changes made by applying the description of the present invention and the scope of the patent application should be included in the scope of the patent of the present invention.

1: Bicycle dropper seat tube

10: fixed tube

14: Pivot seat

14b: Through hole

142: arm

144: bridge part

144a: Perforation

16: Pivot

18: Limit axis

24: telescopic rod

26: Actuating pin rod

32:Actuator

322: part one

324: part two

324b: long hole

38: Casing

Claims (9)

A bicycle lifting seat tube, comprising: a fixed tube; a length adjusting device, having a cylinder body, a telescopic rod and an actuating pin rod, wherein the telescopic rod is partly located in the cylinder body and partly protruded outside, and can reciprocate relative to the cylinder body along the axial direction of the cylinder body; the actuating pin rod has an exposed part; The telescopic rod can move on the cylinder body; the length adjustment device is arranged on the fixed pipe, and one of the cylinder body or the telescopic rod is fixed in the fixed pipe, and the other extends out of the fixed pipe; an actuating device has an actuating part, a pull cord and a sliding part; In addition, the actuator has a first contact portion; the slider is connected to the pull cord, and has a second contact portion abutting against the first contact portion; when the pull cord is pulled, the slider slides from a fifth position of the first contact portion to a sixth position on the first contact portion, and when the slider slides to the sixth position, the actuator pivots to the fourth position; move in the moving direction. The bicycle lifter seat tube as described in claim 1, wherein the fixed tube includes a pivot base, and the pivot base includes two arm parts; the actuator is pivotally arranged on the pivot base and is located between the two arm parts. The bicycle lifter seat tube as described in Claim 2, wherein the actuator has a first part and a second part forming a predetermined angle with each other, and one end of the first part is pivotally connected to the pivot seat by a pivot; the second part has the first contact part. The bicycle lifter seat tube as described in claim 2, wherein the pivot seat includes a bridge connecting the two arm parts; the bridge has a through hole; the first contact part has a long hole; the pull cord is passed through the long hole and the through hole, and is connected with the slider. The bicycle dropper seat tube as claimed in claim 3, wherein the first portion has a concave hole for abutting against the exposed portion of the actuating pin rod. The bicycle dropper seat tube according to claim 4, wherein the actuating device includes a sleeve sleeved on the outside of the pull cord, and one end of the sleeve abuts against the bridging portion. The bicycle dropper seat tube according to Claim 1, wherein the second contact portion of the sliding member is a convex arc surface. The bicycle lifter seat tube as described in Claim 1, wherein the sliding member includes a body and a friction member; the body is connected to the pull cord; the friction member is sleeved on the pull cord and is located at the connection between the body and the pull cord, wherein one end of the friction member forms the second contact portion. The bicycle dropper seat tube as described in claim 8, wherein the second contact portion of the friction member is a convex arc surface.

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