TWI594916B - Bicycle seat tube adjustment structure - Google Patents

Description

Bicycle seat tube adjustment structure

The invention relates to a bicycle seat tube, in particular to a bicycle seat tube length adjustment structure.

Before starting to ride a bicycle, the rider usually needs to adjust the seat tube length according to his height, size or other needs, and then adjust the height of the seat cushion to achieve the best riding posture. In order to enable the seat tube to adjust the length, the prior art has a pneumatic rod installed in the seat tube. The air rod is connected to the seat cushion, and the rider can trigger the air pressure rod to expand and contract and move the seat tube to expand and contract the length by pulling the relevant control element. In order to achieve the purpose of adjusting the height of the seat cushion. However, due to the large diameter of the gas pressure bar having sufficient supporting force, the bicycle cannot be further lightweighted, and the compressed gas sealed in the gas pressure bar is liable to cause air leakage and damage due to factors such as wear of the member or external environment.

In view of the problems in the prior art, the object of the present invention is to provide a bicycle seat tube adjusting structure, which is selectively engaged and positioned in a positioning groove of a positioning rod fixed to the upper tube by using a plurality of rollers. In order to achieve the purpose of adjusting the length of the seat tube, the seat tube manufacturing cost can be reduced, the seat tube quality can be ensured, and the bicycle can be further lightened.

In order to achieve the above-mentioned creative purpose, the technical means adopted by the present invention is such that a bicycle seat tube adjusting structure comprises: a lower tube and an upper tube, the lower tube having an upper open end, the upper tube being axially movable The positioning unit includes a positioning rod, a roller seat, a valve stem and a plurality of rollers. The positioning rod is fixedly disposed in the upper tube, and the positioning rod has a a side plate disposed along a long axial direction of the upper tube and Fixed to the inner wall of the upper tube, the side plate is formed with a plurality of positioning grooves on a side not abutting the inner wall of the upper tube, and each positioning groove is arranged along the long axial direction of the upper tube, and each positioning The groove is perpendicular to the long axis of the upper tube and extends laterally. The roller seat is an elongated seat body, the lower end of which is fixed at the lower opening of the lower tube, and the upper end projects into the upper tube, the roller seat The utility model has a ring wall, a shaft hole and a plurality of slots, the shaft hole penetrating the roller seat along a long axial direction of the roller seat, wherein the plurality of slots are arranged on the roller along a long axial interval of the roller seat On the ring wall of the seat, each slot corresponds to a slot, each slot is perpendicular to the long axis of the roller seat and extends laterally and communicates with the shaft hole, and the valve stem is disposed in the shaft hole of the roller seat The valve stem has a plurality of concave portions, a plurality of convex portions and a set of columns, and the concave portions and the convex portions are staggered along the long axial interval of the valve rod on the side wall surface of the valve stem, each concave portion and each convex portion a portion extending perpendicularly to the longitudinal direction of the valve stem, the concave portion and the convex portion corresponding to the slot of the roller seat, the sleeve protruding axially formed on the valve stem And extending through the lower end of the roller seat, the roller is laterally disposed in the slot of the roller seat; a switching assembly comprising a rebounding elastic member, a driving wire and a returning elastic member, the lifting elastic member One end of the upper tube is pushed against the upper tube, and the other end is abutted against the lower end of the roller rod. The driving wire is connected to the sleeve of the lower end of the valve stem, and the reset elastic member is sleeved on the sleeve of the valve stem. The two ends are respectively abutted against the lower end of the valve stem and the lower end of the roller seat; in a natural state in which the driving wire and the valve stem are not pulled downward, the return elastic member pushes against the valve stem, so that the valve The convex portions of the rods respectively correspond to the slots of the roller seat.

The switch assembly may further include a wire holder fixed to the lower end of the roller seat, and a limit groove is formed in the wire seat, and the drive wire is connected to the sleeve of the valve stem through a wire hook, the wire hook The upper and lower movements are arranged in the limit groove of the wire seat; in the natural state in which the drive wire and the valve stem are not pulled downward, the reset elastic member pushes against the valve stem and the wire hook and the drive The wire is moved upwards so that the wire hooks against the top of the limiting groove and the convex portion of the valve stem respectively corresponds to the slot of the roller seat.

An outer side surface of the ring wall of the roller seat can be formed with a side plane disposed along a long axis of the roller seat and correspondingly abutting a side surface of the side plate on which the positioning groove is formed, the slot spacing Arranged on the side plane.

The positioning rod may further have a guide post disposed along a long axial direction of the upper tube, the upper end of the guide post is connected to the side plate through a top plate, and the lifting elastic member is sleeved on the guide post of the positioning rod One end of the rebound elastic member abuts against the top plate of the positioning rod, and the other end abuts against the lower end of the roller seat.

The roller seat may further have a guide hole extending through the roller seat along a long axial direction of the roller seat, and the guide post of the positioning rod is disposed in the guide hole.

The outer side of the lower end of the upper tube may be sleeved with a shaft bushing, and the shaft bushing is sandwiched between the upper tube and the lower tube.

According to the design as described above, the bicycle seat tube adjusting structure of the present invention can drive the valve rod to push the roller into the positioning groove of the side plate disposed on the inner side of the upper tube to fix the seat. The length of the tube, or the roller can be disengaged from the positioning groove of the side plate to adjust the length of the seat tube, so that the structure of the seat tube can be simplified, and the bicycle equipped with the seat tube of the invention can be further lightened Quantitatively achieve the goal of balancing high quality with low production costs.

11‧‧‧Under the tube

12‧‧‧Upper tube

13‧‧‧Shaft bushing

20‧‧‧ Positioning components

21‧‧‧ Positioning rod

211‧‧‧ side panels

212‧‧‧ positioning slot

213‧‧‧ Guide column

214‧‧‧ top board

22‧‧‧Roller seat

221‧‧‧ side plane

222‧‧‧ shaft hole

223‧‧‧Slots

224‧‧‧ Guide hole

23‧‧‧ valve stem

231‧‧‧ recess

232‧‧‧ convex

233‧‧‧ sets of columns

24‧‧ ‧roller

30‧‧‧Switching components

31‧‧‧Return elastic parts

32‧‧‧ drive wire

33‧‧‧Reset elastic parts

34‧‧‧ wire base

341‧‧‧ Limit slot

35‧‧‧ line hook

Figure 1 is a perspective view of the present invention.

Figure 2 is a perspective exploded view of the present invention.

3 is an exploded perspective view of the positioning assembly of the present invention.

Figure 4 is a side cross-sectional view showing the length of the non-adjustable seat tube of the present invention.

Fig. 5 is a side elevational cross-sectional view showing the state of the non-adjustable seat tube in the present invention.

Figure 6 is a side cross-sectional view showing the state of the adjustable seat tube in the present invention.

Figure 7 is a side elevational cross-sectional view showing the state of the adjustable seat tube in the present invention.

The technical means adopted by the present invention for achieving the intended purpose of creation are further explained below in conjunction with the drawings and preferred embodiments of the present invention.

Referring to FIGS. 1 to 3, the bicycle seat tube adjusting structure of the present invention includes a lower tube 11, an upper tube 12, a positioning assembly 20 and a switching assembly 30.

The lower tube 11 has an upper open end. The upper tube 12 is axially movably disposed at an open end of the lower tube 10. The lower end of the upper tube 12 extends into the lower tube 11. The upper tube The upper end of the upper end of the lower tube 10 is disposed at the upper end of the upper tube 12, and the outer side of the upper tube 12 is sleeved with a shaft bushing 13 which is sleeved on the outer side of the upper end of the upper tube 12. It is interposed between the upper tube 12 and the lower tube 11 so that the upper tube 12 can smoothly move relative to the lower tube 11.

The positioning assembly 20 includes a positioning rod 21, a roller seat 22, a valve stem 23 and a plurality of rollers 24.

As shown in FIG. 3 and FIG. 4 , the positioning rod 21 is disposed and fixed in the upper tube 12 , and the positioning rod 21 has a side plate 211 and a guide post 213 . The side plate 211 is an elongated plate body disposed along the long axis of the upper tube 12 and fixed to the inner wall of the upper tube 12, and the side plate 211 is not in contact with the inner wall of the upper tube 12 A plurality of positioning slots 212 are formed on the side, and the positioning slots 212 are arranged along the long axis of the upper tube 12, and each positioning slot 212 extends perpendicularly to the long axis of the upper tube 12 and extends laterally. The guide post 213 is an elongated rod body and is disposed along the long axial direction of the upper tube 12, and the upper end of the guide post 213 is connected to the side plate 211 through a top plate 214.

The roller seat 22 is an elongated seat. The lower end of the roller seat 22 is fixed to the lower opening of the lower tube 11 and the upper end projects into the upper tube 12. The roller seat 22 has a ring wall. A shaft hole 222, a plurality of slots 223 and a guide hole 224. The shaft hole 222 penetrates the roller seat 22 along the long axial direction of the roller seat 22. The plurality of slots 223 are arranged along the long axial direction of the roller seat 22 on the ring wall of the roller seat 22. Each of the slots 223 corresponds to the positioning slot 212. Each slot 223 extends transversely to the long axis of the roller holder 22 and extends through the ring wall of the roller holder 22 to communicate with the shaft hole 222. The guide hole 224 extends through the roller seat 22 along the long axis of the roller seat 22 , and the guide post 213 of the positioning rod 21 passes through the guide hole 224 .

In a specific embodiment of the present invention, the guide hole 224 further penetrates the ring wall of the roller seat 22, and the outer side surface of the ring wall of the roller seat 22 is formed with a side plane 221 along which the side plane 221 is The long axis of the roller holder 22 is disposed in the axial direction and abuts against the side surface of the side plate 211 on which the positioning groove 212 is formed to prevent the upper tube 12 from rotating relative to the roller seat 22. The slots 223 are spaced apart from each other. On the side plane 221.

The valve stem 23 is axially movably disposed in a shaft hole 222 of the roller seat 22. The valve stem 23 has a plurality of concave portions 231, a plurality of convex portions 232 and a set of columns 233. The plurality of concave portions 231 and the plurality of convex portions 232 are staggered along the long axial direction of the valve stem 23 on the side wall surface of the valve stem 23, and each concave portion 231 and each convex portion 232 are perpendicular to the length of the valve stem 23. Extending axially and laterally, the recess 231 and the projection 232 correspond to the slot 223 of the roller seat 22. The sleeve 233 is axially protruded from the lower end of the valve stem 23, and the sleeve 233 extends through the lower end of the roller seat 22.

The plurality of rollers 24 are laterally disposed in the slots 223 of the roller seat 22, respectively.

The switching assembly 30 includes a rebounding elastic member 31, a driving wire 32 and a returning elastic member 33. The lifting elastic member 31 is sleeved on the guiding post 213 of the positioning rod 21 , and one end of the lifting elastic member 31 abuts against the top plate 214 of the positioning rod 21 to push the upper tube 12 through the positioning rod 21 , The other end of the rebounding elastic member 31 abuts against the lower end of the roller seat 22. In the natural state, the lifting elastic member 31 is pushed upward by the positioning rod 21 against the upper tube 12. The drive wire 32 is connected to the sleeve 233 at the lower end of the valve stem 23. The reset elastic member 33 is sleeved on the sleeve 233 of the valve stem 23, and the two ends of the return elastic member 33 abut against the lower end of the valve stem 23 and the lower end of the roller seat 22, respectively, in a natural state, the The return elastic member 33 is pushed upward against the valve stem 23 such that the convex portion 232 of the valve stem 23 respectively corresponds to the slot 223 of the roller seat 22. Specifically, the rebound elastic member 31 and the return elastic member 33 are both compression springs.

As shown in FIG. 4 and FIG. 5, in the natural state in which the driving wire 32 and the valve stem 23 are not pulled downward, the position of the convex portion 232 of the valve stem 23 corresponds to the slot 223 of the roller seat 22, respectively. Each of the rollers 24 is respectively engaged by the convex portions 232 and is respectively engaged and positioned in the positioning groove 212 of the side plate 211, thereby fixing the relative position of the upper tube 12 and the lower tube 11, that is, fixing the seat tube The length.

Referring to FIG. 6 and FIG. 7 , when the rider wants to adjust the length of the seat tube, the valve rod 23 is driven to move downward through the driving wire 32, so that the concave portion 231 of the valve stem 23 respectively corresponds to the corresponding portion. The slot 223 of the roller seat 22 allows the roller 24 to move between the corresponding recess 231 of the valve stem 23, the slot 223 of the roller seat 22, and the positioning groove 212 of the side plate 211. At this time, if the rider does not press down the upper tube 12, the lifting elastic member 31 will push the upper tube 12 to move the upper tube 12 upward, and the length of the seat tube is extended; if the rider is from the chair When the pad applies a force to press the upper tube 12, the upper tube 12 moves downward, retracts into the lower tube 11, and compresses the rebound elastic member 31, thereby shortening the overall length of the seat tube.

After the seat tube is adjusted to the required length, the rider only releases the force of pulling the driving wire 32 and the valve stem 23, and the reset elastic member 33 pushes the valve stem 23 upward to reset, so that the valve stem 23 is The protrusions 232 respectively correspond to the slots 223 of the roller holders 22 and are respectively pushed into the positioning slots 212 of the side plates 211 by the rollers 24 to fix the length of the seat tube.

In addition, in the embodiment of the present invention, the switch assembly 30 further includes a wire holder 34 fixed to the lower end of the roller seat 22, and a limit groove 341 is formed in the wire holder 34. The driving wire 32 is connected to the sleeve 233 of the valve stem 23 through a hook 35. The wire hook 35 is vertically and movably disposed in the limiting groove 341 of the wire holder 34. In a natural state in which the driving wire 32 and the valve stem 23 are not pulled downward, the return elastic member 33 pushes against the valve stem 23 and the wire hook 35 and the driving wire 32 move upward, so that the wire hook 35 abuts against The top of the limiting slot 341 and the convex portion 232 of the valve stem 23 respectively correspond to the slot 223 of the roller seat 22; when the rider pulls the driving wire 32 to move downward until the hook 35 abuts against the slot When the bottom of the limiting groove 341 is closed, the concave portion 231 of the valve stem 23 is respectively corresponding to the slot 223 of the roller seat 22 to further adjust the length of the seat tube.

The bicycle seat tube adjusting structure of the present invention can be switched to push the roller 24 to be engaged with the positioning groove 212 of the side plate 211 disposed inside the upper tube 12 to fix the seat tube. The state of the length or the state in which the roller 24 can be disengaged from the positioning groove 212 of the side plate 211 can adjust the length of the seat tube, and the structure of the seat tube can be simplified. The bicycle of the seat tube of the present invention is further lightweight, achieving the goal of achieving both high quality and low production cost.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. The present invention has been disclosed in the preferred embodiments, but is not intended to limit the present invention, and any It is to be understood by those skilled in the art that any simple modifications, equivalent changes and modifications to the above embodiments in accordance with the technical spirit of the present invention are still within the scope of the present invention.

11‧‧‧Under the tube

12‧‧‧Upper tube

13‧‧‧Shaft bushing

21‧‧‧ Positioning rod

211‧‧‧ side panels

212‧‧‧ positioning slot

213‧‧‧ Guide column

214‧‧‧ top board

22‧‧‧Roller seat

224‧‧‧ Guide hole

23‧‧‧ valve stem

233‧‧‧ sets of columns

24‧‧ ‧roller

30‧‧‧Switching components

31‧‧‧Return elastic parts

32‧‧‧ drive wire

33‧‧‧Reset elastic parts

34‧‧‧ wire base

Claims (7)

A bicycle seat tube adjusting structure includes a lower tube, an upper tube, a positioning assembly and a switching assembly, wherein: the lower tube has an upper open end, and the upper tube is axially movably disposed through the lower tube The positioning assembly includes a positioning rod, a roller seat, a valve stem and a plurality of rollers, the positioning rod is disposed and fixed in the upper tube, and the positioning rod has a side plate along which the side plate The length of the upper tube is axially disposed and fixed to the inner wall of the upper tube, and the side plate is formed with a plurality of positioning grooves on a side not adjacent to the inner wall of the upper tube, and the positioning grooves are along the upper tube Long axial arrangement, each positioning slot extends perpendicularly to the long axis of the upper tube, the roller seat is an elongated seat body, the lower end of which is fixed at the lower opening of the lower tube, and the upper end extends into the In the upper tube, the roller seat has a ring wall, a shaft hole and a plurality of slots, the shaft hole penetrating the roller seat along a long axial direction of the roller seat, and the plurality of slots are along the length of the roller seat The axial spacing is arranged on the ring wall of the roller seat, and each slot corresponds to the slot, and each slot is perpendicular to the roller seat Extending axially and laterally and communicating with the shaft hole, the valve stem is disposed in the shaft hole of the roller seat, the valve stem has a plurality of concave portions, a plurality of convex portions and a set of columns, the concave portion and the convex portion along the The long axial spacing of the valve stem is staggered on the side wall surface of the valve stem, and each concave portion and each convex portion extend perpendicularly to the long axial direction of the valve stem, and the concave portion and the convex portion correspond to the groove of the roller seat An axially protruding portion of the sleeve is formed at a lower end of the valve stem and penetrates a lower end of the roller seat, and the roller is laterally disposed in a slot of the roller seat; the switching assembly includes a rebounding elastic member, a driving wire and a returning elastic member, one end of the lifting elastic member is pushed against the upper tube, and the other end is abutted against the lower end of the roller seat, the driving wire is connected to the sleeve of the lower end of the valve stem, and the elastic sleeve is set Provided in the sleeve of the valve stem, the two ends of the return elastic member respectively abut against the lower end of the valve stem and the lower end of the roller seat; in a natural state in which the driving wire and the valve stem are not pulled downward, The return elastic member pushes against the valve stem, so that the convex portion of the valve stem respectively corresponds to the roller Of the slot. The bicycle seat tube adjusting structure according to claim 1, wherein the switching assembly further includes a wire seat fixed to the lower end of the roller seat, and a limiting groove is formed in the wire seat, the driving wire is Connecting the stem of the valve stem through a hook, the hook hook can be moved up and down in the limiting slot of the wire seat; in a natural state where the driving wire and the valve stem are not pulled downward, The reset elastic member pushes against the valve stem and the wire hook and the driving wire move upward, so that the wire hook abuts against the top of the limiting groove and the convex portion of the valve stem respectively corresponds to the slot of the roller seat. The bicycle seat tube adjusting structure according to claim 1, wherein a side plane is formed on an outer side surface of the ring wall of the roller seat, and the side plane is disposed along a long axial direction of the roller seat and correspondingly abuts against the foregoing The side plates are formed with side faces of the positioning grooves, and the slots are spaced apart on the side planes. The bicycle seat tube adjusting structure according to claim 2, wherein a lateral plane is formed on an outer side surface of the ring wall of the roller seat, and the side plane is disposed along a long axial direction of the roller seat and correspondingly abuts against the foregoing The side plates are formed with side faces of the positioning grooves, and the slots are spaced apart on the side planes. The bicycle seat tube adjusting structure according to any one of claims 1 to 4, wherein the positioning rod further has a guide post, the guide post is disposed along a long axial direction of the upper tube, and the upper end of the guide post is transmitted through a The top plate is connected to the side plate, and the lifting elastic member is sleeved on the guide post of the positioning rod. One end of the lifting elastic member abuts against the top plate of the positioning rod, and the other end abuts against the lower end of the roller seat. The bicycle seat tube adjusting structure according to claim 5, wherein the roller seat further has a guiding hole, the guiding hole penetrating the roller seat along a long axial direction of the roller seat, and the guiding rod of the positioning rod is worn. Located in the guide hole. The bicycle seat tube adjusting structure according to claim 6, wherein the outer side of the lower end of the upper tube is sleeved with a shaft bushing, and the shaft bushing is sandwiched between the upper tube and the lower tube.