TWI639528B - Bicycle seat post structure - Google Patents

Abstract

Bicycle bicycle seat post structure comprising an outer tube and an upper portion above the outer tube tube. The seat post is internally provided with a height adjusting device and a shock absorbing cushioning device. A supporting end of the height adjusting device extends into the upper tube to indirectly support the upper tube; the shock absorbing device is disposed inside the upper tube and above the height adjusting device. The shock absorber buffer device includes a closed chamber, a cushioning member and a gas. The gas system is poured into the closed chamber to change the air pressure within the closed chamber. The cushioning member is elastic and is disposed in the sealed chamber, and has an upward elastic supporting force to the upper tube. Therefore, when the seat cushion is pressed down, it has a shock absorbing cushioning force, and the shock absorbing cushioning force and the softness and hardness are achieved by adjusting the air pressure in the shock absorbing cushioning device, and can be based on riding The weight or preference of the passenger can be adjusted at any time.

Description

Bicycle seat post structure

The invention relates to a bicycle seat post structure, in particular to a shock absorber cushioning force provided when a rider rides on a seat cushion, and the shock absorber cushioning force and softness can be adjusted by adjusting the shock absorber buffer device The inner air pressure is achieved, and the bicycle seat post structure can be adjusted at any time according to the rider's weight or the softness and hardness of the shock absorber cushioning force.

Press, the seatpost of the bicycle protrudes above the frame to support the seat cushion. The seat cushion must be adjusted according to the rider's height to make it comfortable when riding. Therefore, the inside of the cushion column is provided with an axial length adjusting lifting device for the rider to adjust the height of the seat cushion to a suitable height. Moreover, in order to enable the rider to have a shock absorbing cushioning force when sitting on the seat cushion, it is conventional to arrange a spring in the cushion column, and the preloading support of the spring causes the cushion to be seated. Can be equipped with shock absorber cushioning comfort. However, it is known that the spring has a shock absorbing cushion effect when the seat cushion is seated. When the spring is installed, the spring constant (K) of the spring is fixed, and the spring constant is changed only when the spring constant is changed. spring. The replacement of the spring is cumbersome, and the rider is not easy to change. Only the manufacturer has the ability to handle it. Therefore, if a bicycle is equipped with a spring or other cushioning element to make the cushion cushioning when it is seated, the shock absorber cushioning force cannot be arbitrarily adjusted according to the rider's weight or preference. The present inventors have made improvements in the application of the present invention in view of the fact that the above-mentioned seatposts have the above-mentioned disadvantages in application.

Therefore, the main object of the present invention is to provide a cushion having a shock absorbing force, and the shock absorbing force is adjustable, and the adjustment can be soft and hard depending on the rider's weight or the shock absorbing force. A bicycle seat post structure that adjusts to the degree of preference.

In order to achieve the above object, a shock absorber cushioning device is installed inside the upper tube of the bicycle seat post of the present invention. The shock absorber buffer device is separated by a closed chamber, the bottom end of the sealed chamber has a partition, and the partition is supported by a height adjusting device extending into a support end of the upper tube, the sealed chamber There is a cushioning element, the bottom end of which is in contact with the spacer, and the top end is indirectly connected to the top end of the upper tube. A gas is injected into the sealed chamber through a nozzle, so that the sealed chamber has a gas pressure. With the arrangement, when the rider sits on the seat cushion, when the upper tube moves axially downward, the bottom end of the cushioning member is supported by the spacer and the support end, and the top end moves downward along the upper tube. The cushioning element and the gas are simultaneously compressed, so that the cushioning effect is obtained when the seat cushion is seated. The gas pressure of the gas can be adjusted and adjusted through the gas nozzle. Therefore, the cushioning force and softness of the cushion can be achieved by adjusting the air pressure in the shock absorber, and can be based on riding. The weight and softness of the person are adjusted at any time.

In order to achieve the above object, the technical means and the achievable effects of the present invention are described in detail in the following preferred embodiments.

Referring to Figures 1 to 3, the bicycle seat post 1 of the present invention has an outer tube 10 and an upper tube 20 positioned above the outer tube 10. A position 11 of the outer wall of the outer tube 10 is fixed to the frame of the bicycle. A top end 21 of the upper tube 20 is provided with a locking device 22 for connecting the seat cushion; a bottom end 23 is extended from the top end of the outer tube 10 into the outer tube 10. A height adjusting device 3 for adjusting the height of the seat cushion is disposed inside the seat post 1, and a shock absorbing cushioning device 4 having a shock absorbing function when the seat cushion is seated is disposed. among them,

For the height adjustment device 3, see Figures 1 and 3. It can be a gas pressure rod or a hydraulic rod, and most of it is disposed inside the outer tube 10. In this embodiment, a gas pressure bar is taken as an example, and includes a cylinder 30 and a tubular piston rod 31 which are relatively axially adjustable, and a control unit 32. A top end 300 (also referred to as a support end) of the cylinder block 30 extends into the upper tube 20 for indirectly supporting the top end 21 of the upper tube 20. A top end 310 of the piston rod 31 extends into the interior of the cylinder block 30, and a bottom end 311 is fixed to a fixed cover 12 fixed to the inside of the outer tube 10, so that the piston rod 31 is fixed. The inside of the piston rod 31 is bored with a striker 312. The striker 312 can be pushed by the control unit 32 to open a valve inside the cylinder 30, so that the cylinder 30 and the piston rod 31 can be opposite shafts. To the displacement, the upper tube 20 adjusts the height of the seat cushion as the cylinder 30 is displaced. The control unit 32 described above can be controlled via a control wrench that is attached to the handlebar of the bicycle.

For the shock absorber 4, see Figures 1 and 2. The inside of the upper tube 20 is disposed above the height adjusting device 3, and the cylinder 30 of the height adjusting device 3 has the function of indirectly supporting the upper tube 20 and the seat cushion via the arrangement of the shock absorbing device 4. A closed chamber 40, a cushioning member 41 and a gas 42 are included. The closed chamber 40 is located inside the upper tube 20, and a spacer 400 (which may be a piston) is disposed at the bottom end, and an upper cover 401 and an inner wall of the upper tube 20 are disposed at the top end. The outer wall of the spacer 400 is provided with an oil damper 402 and a wear ring 403 to contact the inner wall of the upper tube 20 to stop the flow of the oil into the closed chamber 40, and to avoid the spacer 400 and the Wear occurs between the inner walls of the upper tube 20. The bottom end of the spacer 400 is in contact with and supported by the top end (support end) 300 of the cylinder 30 of the height adjusting device 3. The outer wall of the upper cover 401 is locked with the tooth surface 401b of the inner wall of the upper tube 20 by a tooth surface 401a. As shown in FIGS. 2 and 3, the outer wall of the upper cover 401 has a gas barrier ring 401c and the upper tube 20 The walls are connected to block the leakage of gas. The upper cover 401 is provided with a gas nozzle 401d which is externally communicated from the sealed chamber 40 into the sealed chamber 40 for filling the gas 42 into the closed chamber 40. The cushioning member 41 can be made of a material having an elastic function (for example, an elastic rubber or a compression spring). The cushioning member 41 is disposed in the sealing chamber 40. The cushioning member 41 has an axial through hole 410 therebetween. The bottom end is in contact with the spacer 400, and the top end is in contact with the upper cover 401, so that the cushioning member 41 The top end 21 of the upper tube 20 has an elastic supporting force. The gas 42 may be nitrogen gas, and is injected into the sealed chamber 40 through the gas nozzle 401d to have a gas pressure in the sealed chamber 40.

Further, a gap 24 between the inner wall of the upper tube 20 and the outer wall of the cylinder 30 is shown in Fig. 3. The upper end of the gap 24 is separated by the oil-blocking ring 402 of the spacer 400, and the lower end is blocked by the lower oil-blocking ring 25, and the lower oil-blocking ring 25 is fixed to the inner wall of the bottom end 23 of the upper tube 20. , the gap 24 is internally sealed. The gap 24 is filled with an oil 26 having a top end that supports the bottom end of the spacer 400.

After the above components are combined, as shown in Figures 1 and 3. When the height of the seat cushion is adjusted, it is achieved by applying the setting of the height adjusting device 3. When the control unit 32 is pushed up, the striker 312 is pushed upward to open the valve in the cylinder 30, so that the cylinder 30 can be axially displaced, thereby causing the upper tube 20 to be displaced with the cylinder 30. Adjust the height of the cushion. After the height of the seat cushion is adjusted and the control unit 32 is released, the height of the seat cushion can be fixed. After height adjustment, as shown in Figure 4, or as low as shown in Figure 5.

When the rider sits on the cushion (whether the seat is just seated or rides on a bumpy road), it has a shock absorbing effect, mainly by applying the shock absorber 4, as shown in Figures 6 and 7. The figure shows. When the rider sits on the seat cushion or rides on the bumpy road surface, the upper tube 20 is axially moved downward due to the downward pressure. At this time, the top end of the cushioning member 41 will follow the upper tube 20 Move and compress the deformation to make the seat cushion cushioning effect, as shown in Figure 7. Since the space in the sealed chamber 40 decreases as the upper tube 20 moves downward, the sealed chamber 40 is originally filled with a gas 42 having a gas pressure, and the amount of the air pressure is adjustable. Shock buffer stroke distance and buffer softness. Therefore, the rider needs to adjust the shock absorber cushion stroke distance and the cushion softness of the seat cushion, and the amount of the gas 42 can be filled through the air nozzle 401d to adjust the air pressure in the airtight chamber 40. Moreover, the cushioning cushioning force and softness of the seat cushion can adjust the air pressure at any time according to the rider's weight and preference.

In summary, the cushion cushioning force and softness of the seat cushion of the present invention can be achieved by adjusting the air pressure in the shock absorber buffer device 4, and the desired function and purpose can be achieved. The embodiments described above are only intended to illustrate the invention, and all changes in equivalent structures may be made without departing from the scope of the invention.

Pillow column 1 Outer tube 10 Upper tube 20 Position 11 Top 21 Locking device 22 Bottom end 23 Height adjustment device 3 Shock absorber 4 Cylinder 30 Piston rod 31 Control unit 32 Top (support end) 300 Top 310 Bottom end 311 Fixed cover 12 striker 312 closed chamber 40 cushioning element 41 gas 42 spacer 400 upper cover 401 oil damper 402 wear ring 403 tooth surface 401a, 401b gas block 401c gas nozzle 401d perforation 410 gap 24 lower oil ring 25 oil 26

Fig. 1 is a perspective view showing a combination of the embodiment of the present invention. Fig. 2 is a partially cutaway perspective view showing an embodiment of the present invention. Fig. 3 is a sectional view showing a combination of the embodiment of the present invention. Figs. 4 and 5 are views showing a seat height adjusting operation of the embodiment of the present invention. Fig. 6 and Fig. 7 are diagrams showing the cushion cushioning action diagram of the embodiment of the present invention.

Claims (10)

A bicycle seat post structure includes an outer tube and an upper tube positioned above the outer tube; the outer wall of the outer tube is fixed at a position to a frame of the bicycle; the upper tube has a top end, the top end is The utility model is provided with a locking device for connecting a seat cushion; the upper tube has a bottom end extending from the top end of the outer tube into the outer tube; the height of the seat post is arranged with a height adjusting device and a shock absorber buffer The height adjusting device is disposed inside the outer tube, one end is fixed, and the other opposite end has a supporting end, and the supporting end extends into the upper tube to indirectly support the upper tube; the shock absorber buffer The device is disposed inside the upper tube and above the height adjusting device, and includes a closed chamber, a buffering member and a gas; wherein the closed chamber is located inside the upper tube and is disposed at the bottom end a partition, the top end is provided with an upper cover and an inner wall of the upper tube; the outer wall of the partition is in contact with the inner wall of the upper tube, and the bottom end of the spacer is connected to the height adjusting device The support end is in contact; the upper cover The wall system is fixed to the inner wall of the upper tube; the air nozzle is connected from the sealed chamber to the closed chamber, and is filled with the gas into the closed chamber to change the air pressure in the closed chamber; the buffer The component is elastic and disposed in the sealed chamber. The bottom end of the cushioning member is in contact with the spacer, and the top end is in contact with the upper cover. The cushioning member has an upward elastic supporting force on the upper tube. The bicycle seat post structure of claim 1, wherein the outer wall of the spacer is provided with an oil retaining ring and a wear ring to contact the inner wall of the upper tube. The bicycle seat post structure of claim 2, wherein the outer wall of the upper cover is provided with a gas blocking ring that is in contact with the inner wall of the upper tube. The bicycle seat post structure of claim 3, wherein the cushioning member is an elastic rubber having an axial perforation therebetween. The bicycle seat post structure of claim 3, wherein the cushioning element is a compression spring. The bicycle seat post structure of claim 3, wherein the height adjustment device comprises a cylinder body and a tubular piston rod, and a control unit; the top end of the cylinder body is the support end, and the upper end is inserted into the upper tube a top end of the piston rod extends into the inner portion of the cylinder body, and a bottom end is fixed to a fixing cover fixed to the inner portion of the outer tube; the inner portion of the piston rod is provided with a striker, and the striker is coupled with The control unit is coupled, and can be pushed by the control unit by a person to control the control unit, thereby opening a valve inside the cylinder to make relative axial displacement adjustment between the cylinder and the piston rod. The bicycle seat post structure of claim 6, wherein a gap is formed between an inner wall of the upper tube and an outer wall of the cylinder, the upper end of the gap is separated by the oil-blocking ring, and the lower end is blocked. The oil ring is blocked, and the lower oil ring is fixed on the inner wall of the bottom end of the upper tube, and the gap is filled with an oil. The bicycle seat post structure of claim 6, wherein the control unit is controlled via a control lever attached to the bicycle handle. The bicycle seat post structure of claim 6, wherein the height adjustment device is a gas pressure bar. The bicycle seat post structure of claim 6, wherein the height adjustment device is a hydraulic rod.