TWM648132U - Height adjusting device with air pressure buffer - Google Patents

Abstract

This invention relates to a height adjustment device with air pressure buffering, which is suitable for installation on bicycles and includes an outer tube, a cylinder installed in the outer tube, a piston rod, a piston combined with one end of the piston rod, and A mouthful of anger. The piston rod is displaceable relative to the cylinder, so that the height of the bicycle seat cushion is adjustable. The gas pressure filled inside the cylinder will generate a damping force on the piston, so that the height adjustment device can provide a gas pressure buffering effect. Furthermore, gas can be filled into the cylinder through the air nozzle or the gas in the cylinder can be discharged from the air nozzle, so that the air pressure value in the cylinder can be conveniently adjusted to adjust the strength of the air pressure buffer damping.

Description

Height adjustment device with air pressure buffer

The invention relates to a height adjustment device, particularly a device suitable for height adjustment of bicycle seat cushions and having an air pressure buffering effect.

In order to meet the needs of different rider heights, the height of the bicycle seat cushion needs to be designed to be adjustable. A conventional bicycle seat height adjustment device generally includes a support tube connected to the bicycle frame, a seat tube located in the support tube, and a telescopic rod located in the seat tube. The top of the seat tube is provided with a seat cushion fixing seat for combining with the seat cushion. The telescopic rod includes a cylinder accommodated in the seat tube and a piston rod accommodated in the cylinder and displaceable relative to the cylinder. When adjusting the height of the seat cushion, the piston rod can be displaced relative to the cylinder through the operation of a handle or a wire control component, thereby making the height of the seat cushion adjustable or fixed.

Furthermore, in order to provide riding comfort, some conventional bicycles are equipped with air-pressure shock absorbers to achieve a shock-absorbing cushioning effect. Conventional pneumatic shock absorbers are generally attached to the seat tube or front fork of a bicycle and include an outer tube and an inner tube contained in the outer tube. An air chamber is formed between the inner tube and the outer tube and is filled with gas. . The outer tube can move up and down relative to the inner tube and squeeze the gas to obtain buffering force, thereby achieving a shock-absorbing effect. In addition, gas can be filled into the air chamber through the air nozzle to change the air pressure value of the air chamber, so that the rider can adjust the shock absorber strength according to road conditions or personal needs.

However, the shock absorber device of conventional bicycles is installed separately from the height adjustment device of the seat cushion, causing the overall structure of the bicycle to be complicated and the cost to be increased. In addition, the convenience of adjusting the strength of gas damping also needs to be improved.

The purpose of this creation is to provide a height adjustment device with air pressure buffering, which is suitable for adjusting the height of bicycle seat cushions, can provide an air pressure buffering effect, and has the advantages of simple structure and convenient adjustment of air pressure damping intensity.

A height adjustment device with air pressure buffering according to an embodiment of the invention includes an outer tube, a cylinder, a first seal, a second seal, a piston rod, a piston, a control pin and an air nozzle. The outer tube includes a first end and a second end separated along a longitudinal direction. The cylinder is disposed in the outer tube. The cylinder has an air chamber inside for gas accommodating, and an annular chamber is formed between the outer tube and the cylinder for gas flow. The first sealing member is disposed in the first end of the outer tube, and the inside of the first sealing member has a first through hole extending along the longitudinal direction and a first channel connecting the first through hole and the chamber, The first bore includes a valve port communicating with the air chamber of the cylinder. The second sealing member is disposed in the second end of the outer tube. The interior of the second sealing member has a second through hole extending along the longitudinal direction and a second channel communicating with the chamber, wherein the cylinder is combined with Between the first sealing member and the second sealing member, the air chamber of the cylinder can be communicated with and the second sealing member. The piston rod includes an inner end extending into the outer tube and an outer end outside the outer tube. The inside of the piston rod has a rod hole extending along the longitudinal direction, and the inner end of the piston rod passes through A second perforation of the second seal. The piston is arranged in the cylinder and coupled to the inner end of the piston rod. The interior of the piston has a gas channel extending along the longitudinal direction. The gas channel connects the rod hole of the piston rod and the air chamber of the cylinder. This allows gas to enter the gas chamber of the cylinder through the rod hole of the piston rod and the gas channel. The control pin is movably disposed in the first through hole of the first sealing member to close or open the valve port of the first sealing member. When the control pin closes the valve port, the gas in the air chamber cannot Flows to the first channel of the first seal. When the control pin opens the valve port, the gas in the air chamber can flow to the first channel of the first seal through the valve port, and then flows to the outer tube. The chamber between the cylinder and the cylinder. The gas nozzle is disposed on the piston rod and communicates with the rod hole, so that gas can be driven into the rod hole of the piston rod through the gas nozzle to adjust the gas pressure in the gas chamber.

In one embodiment, the control pin has a sealing portion in the air chamber. When the control pin moves in the first through hole, the sealing portion can close or open the valve port.

In one embodiment, the second passage includes a communication port at one end of the second sealing member and communicating with the air chamber of the cylinder.

In one embodiment, the rod hole penetrates from the inner end of the piston rod to the outer end of the piston rod. The air nozzle is located at the outer end of the piston rod.

In one embodiment, the gas channel runs from the first part of the piston to the second part of the piston.

Other objects, advantages and features of the present invention can be understood from the following detailed description of the preferred embodiments and with reference to the accompanying drawings.

The specific embodiments are only examples but not limiting, and the preferred structure of the present invention is described as follows with reference to the attached drawings:

Figures 1 to 6 show a height adjustment device according to a first embodiment of the present invention, which is suitable for adjusting the height of a bicycle seat cushion and has an air pressure buffering effect. The height adjustment device includes an outer tube 11 , a cylinder 12 , a first seal 13 , a second seal 14 , a piston rod 15 , a piston 16 , a control pin 17 and an air nozzle 18 . The outer tube 11 has a first end (top end) 111 and a second end (bottom end) 112 separated along a longitudinal direction. The first end 111 can be assembled to the bicycle through a connecting seat or a seat tube (not shown). Under the seat cushion (not shown). The cylinder 12 is disposed in the outer tube 11. The cylinder 12 has an air chamber 121 inside for gas accommodating, and an annular chamber 122 is formed between the outer tube 11 and the cylinder 12 for gas flow, as shown in Figure 5 Show.

The first seal 13 is disposed in the first end 111 of the outer tube 11 and abuts against the inner wall of the outer tube 11 . The first sealing member 13 has a first through hole 131 extending along the longitudinal direction inside, and the first sealing member 13 is provided with a first channel 132 connecting the first through hole 131 and the chamber 122 , as shown in FIG. 5 . In this embodiment, at least one O-ring (or gasket) 133 is provided around the outer periphery of the first seal 13 to abut against the inner wall of the outer tube 11 . Furthermore, one end of the first through hole 131 includes a valve port 134 communicating with the air chamber 121 of the cylinder 12 .

The second seal 14 is disposed in the second end 112 of the outer tube 11 . The second sealing member 14 has a second through hole 141 extending longitudinally inside, and the second sealing member 14 is provided with a second passage 142 connecting the air chamber 121 and the accommodation chamber 122, as shown in FIG. 6 . In this embodiment, the outer periphery of the second sealing member 14 is against the inner wall of the outer tube 11 and is provided with at least one O-ring (or gasket) 143 . Furthermore, the second passage 142 includes a communication port 144 at one end of the second seal 14 and communicating with the air chamber 121 of the cylinder 12 . The cylinder 12 is combined between the first seal 13 and the second seal 14 so that the air chamber 121 of the cylinder 12 can communicate with the first passage 132 and the second passage 142, as shown in FIG. 3 .

The piston rod 15 includes an inner end 151 extending into the outer tube 11 and an outer end 152 outside the outer tube 11 . The outer end 152 of the piston rod 15 is generally fixed on the bicycle frame or a support tube. The interior of the piston rod 15 has a rod hole 153 extending along the longitudinal direction and penetrating the inner end 151 and the outer end 152 . The inner end 151 of the piston rod 15 passes through the second through hole 141 of the second seal 14 . The air nozzle 18 is disposed on the piston rod 15 and communicates with the rod hole 153 , so that the air nozzle 18 can be used to inflate the rod hole 153 of the piston rod 15 through the air nozzle 18 .

The piston 16 is connected to the inner end 151 of the piston rod 15 . In this embodiment, the piston 16 has a first part 161 with a large diameter and a second part 162 with a small diameter. The first part 161 is disposed in the cylinder 12 . The outer periphery of the first part 161 abuts the inner wall of the cylinder 12 and is provided with at least one O-ring (or gasket) 163 . The second part 162 is inserted into the inner end 151 of the piston rod 15 . The outer periphery of the second part 162 abuts the inner wall of the piston rod 15 and is provided with at least one O-ring 164 , as shown in FIG. 4 . Furthermore, the interior of the piston 16 has a gas channel 165 extending along the longitudinal direction and penetrating the first part 161 and the second part 162. The gas channel 165 communicates the rod hole 153 of the piston rod 15 and the air chamber 121 of the cylinder 12. As shown in Figure 3. When the rod hole 153 of the piston rod 15 is inflated through the air nozzle 18, the gas will be filled into the air chamber 121 of the cylinder 12 through the gas hole 165, so that the gas pressure in the air chamber 121 is adjustable.

The control pin 17 is movably inserted into the first through hole 131 of the first seal 13 and has a sealing portion 171 located in the air chamber 121 . When the control pin 17 moves in the first through hole 131, the sealing portion 171 can close or open the valve port 134. When the sealing part 171 closes the valve port 134, the gas in the air chamber 121 cannot flow to the first channel 132 of the first seal 13; when the sealing part 171 opens the valve port 134, the gas in the air chamber 121 can pass through the valve port. 134 flows to the first channel 132 of the first seal 13, and then flows to the chamber 122 between the outer tube 11 and the cylinder 12. In this embodiment, a small-diameter portion 172 is provided in the middle of the control pin 17 . The outer diameter of the small-diameter portion 172 is smaller than the outer diameter of the sealing portion 171 and is aligned with the first channel 132 so that gas can flow through the valve port 134 . to the first channel 132, as shown in Figure 5.

FIG. 4 is an operation schematic diagram of the height adjustment device of the present invention, which shows that the user operates a control device (not shown in the figure) to cause the control pin 17 of FIG. 3 to move toward the direction of the piston 16 . The control device is a conventional technology, and may be, for example, a lever, a button, or a wire control component. When the control pin 17 moves toward the direction of the piston 16, the sealing portion 171 will open the valve port 134. Therefore, as shown by the arrows in FIGS. 4, 5 and 6, the gas in the air chamber 121 will flow through the valve port 134. to the first channel 132 of the first seal 13, then to the chamber 122 between the outer tube 11 and the cylinder 12, and then to the cylinder through the second channel 142 and the communication port 144 of the second seal 14. 12 of the air chamber 121 (see Figure 6, the gas enters the lower space of the air chamber 121), so that the gas can push against the bottom of the piston 16 and push the piston 16 towards the first end 111 of the outer tube 11 (see Figure 4). On the contrary, the gas can also flow from the lower space of the air chamber 121 to the chamber 122 through the communication port 144 and the second channel 142, and then flow to the air chamber 121 of the cylinder 12 through the first channel 132 of the first seal 13 (not shown in the figure). , the gas enters the upper space of the air chamber 121 ), so that the gas can push against the top of the piston 16 and push the piston 16 toward the second end 112 of the outer tube 11 . Accordingly, the piston 16 can be displaced within the cylinder 12 along the longitudinal direction (the cylinder 12 can rise or fall relative to the piston 16), so that the height of the bicycle seat cushion is adjustable. That is, when the cylinder 12 is lowered relative to the piston rod 15, the gas in the air chamber 121 will not cause resistance to the piston 16, and the height of the seat combined with the first end 111 of the outer tube 11 will be lowered; the cylinder 12 is relative to the piston rod 15. When 15 rises, the height of the seat cushion will rise. On the other hand, when the rider releases the control device, the sealing portion 171 of the piston pin 17 will close the valve port 134, so that the gas in the air chamber 121 will cause resistance to the movement of the piston 16, and the contact between the piston rod 15 and the seat cushion will The location will be located.

As mentioned above, the height adjustment device according to the present invention is applicable to the structure of a bicycle, so that the height of the seat cushion of the bicycle is adjustable. Furthermore, the vibration energy is absorbed by the damping force generated by the gas pressure in the air chamber 121, so that the height adjustment device of the present invention can provide an air pressure buffering effect, and gas can be filled into the air chamber 121 through the air nozzle 18. Or the gas in the air chamber 121 is released from the air nozzle 18 so that the air pressure value in the air chamber 121 can be conveniently adjusted to control the strength of the air pressure buffer damping. Furthermore, in addition to being connected to the piston 16 and being able to move integrally relative to the cylinder 12, the piston rod 15 of the present invention also provides the installation of the air nozzle 18 and connects the air chamber 121 and the piston 16 with the design of the rod hole 153. The second channel 142 has the guiding function of inflation and deflation). In addition, locating the control pin 17 at the top of the outer tube 11 makes it convenient for the user to directly press the operating member (control device) to operate the lifting and lowering of the seat cushion. There is no need to use a wire control component with a complex structure to operate, which simplifies the structure and facilitates assembly. Advantages of convenience. Therefore, this invention combines the shock absorbing function of the bicycle and the height adjustment function of the seat cushion with a simple structure, which is more advanced than the previous technology.

Figures 7 to 9 show the height adjustment device of the second embodiment of the present invention, in which a connecting seat 2 is provided at the first end (top) 111 of the outer tube 11, and the connecting seat 2 can be assembled to a bicycle seat cushion ( (not shown), and an opening 21 is provided on the top of the connecting base 2 . The upper end of the control pin 17 is located in the opening 21 , and the control pin 17 can be controlled by a control device (not shown) to move in the first through hole 131 of the first seal 13 to close or open the valve port 134 . When the sealing portion 171 opens the valve port 134, the piston rod 15 can be displaced in the cylinder 12 along the longitudinal direction, so that the height of the bicycle seat cushion can be adjusted, and the air pressure value in the air chamber 121 can be inflated through the air nozzle 18 to adjust to have an air pressure cushioning effect.

Figures 10 to 12 show a height adjustment device according to a third embodiment of the present invention. In this embodiment, the height adjustment device further includes a seat tube 3 and a support tube 4. One end of the seat tube 3 is provided with a connecting seat 31. The connecting seat 31 can be assembled to a bicycle seat cushion (not shown). Below, an opening 311 is provided at the top of the connecting base 31 . The above-mentioned outer tube 11 is installed inside the seat tube 3 and the upper end of the control pin 17 is located in the opening 311 so that the control pin 17 can be manipulated to move in the first through hole 131 of the first seal 13 to close or open. Open valve port 134. The support tube 4 is used to connect with a bicycle frame (not shown). The upper end 41 of the support tube 4 is provided with a cover 42. The lower end 43 of the support tube 4 is provided with a positioning seat 44. The outer end 152 of the piston rod 15 Combined with the positioning seat 44. When the sealing portion 171 opens the valve port 134, the piston rod 15 can be displaced in the cylinder 12 along the longitudinal direction, so that the seat tube 3 can move relative to the support tube 4. Accordingly, the seat height of the bicycle can be adjusted, and the air volume can be adjusted. The air pressure value in the chamber 121 can be adjusted through the inflation of the air nozzle 18 to have an air pressure buffering effect.

In the foregoing description, the invention is only described with respect to specific embodiments, and various changes or modifications may still be made according to the features of the invention. Therefore, obvious substitutions and modifications that can be made by those skilled in the art will be included in the patent scope claimed by this invention.

11:Outer tube 111:First end

112:Second end 12:Cylinder block

121:Air chamber 122:Room

13:First seal 131:First piercing

132:First channel 133:O-ring

134: Valve port 14:Second seal

141: Second piercing 142:Second channel

143:O-ring 144: Connecting port

15:piston rod 151:Inner end

152:Outer end 153:Rod hole

16:piston 161: Part One

162:Part 2 163:O-ring

164:O-ring 165:Gas channel

17:Control pin 171:Sealing part

172: Trail Department 18: Air nozzle

2: Connector 21:Open your mouth

3:Seat tube 31: Connector

311:Open your mouth 4:Support tube

41: Upper end 42: cover

43:lower end 44: Positioning seat

Figure 1 is a perspective view of a height adjustment device with air pressure buffering according to the first embodiment of the present invention.

Figure 2 is an exploded view of the height adjustment device of Figure 1.

FIG. 3 is a partial cross-sectional view of the height adjustment device of FIG. 1 .

FIG. 4 shows a schematic diagram of an operating state of the height adjustment device of FIG. 3 .

FIG. 5 shows a partial enlarged schematic view of the first end of the outer tube of the height adjustment device of FIG. 4 .

FIG. 6 shows a partially enlarged schematic view of the second end of the outer tube of the height adjustment device of FIG. 4 .

Figure 7 is a perspective view of the height adjustment device with air pressure buffering according to the second embodiment of the present invention.

Figure 8 is an exploded view of the height adjustment device of Figure 7;

Figure 9 is a partial cross-sectional view of the height adjustment device of Figure 7;

Figure 10 is a perspective view of the height adjustment device with air pressure buffering according to the third embodiment of the present invention.

Figure 11 is an exploded view of the height adjustment device of Figure 10;

Figure 12 is a partial cross-sectional view of the height adjustment device of Figure 10;

11:Outer tube

111:First end

112:Second end

12:Cylinder block

121:Air chamber

13:First seal

131:First piercing

132:First channel

133:O-ring

134: Valve port

14:Second seal

141: Second piercing

142:Second channel

143:O-ring

15:piston rod

151:Inner end

152:Outer end

153:Rod hole

16:piston

165:Gas channel

17:Control pin

18: Air nozzle

Claims (9)

A height adjustment device with air pressure buffering, including: an outer tube including first and second ends separated along a longitudinal direction; A cylinder, which is arranged in the outer tube, has an air chamber inside the cylinder for gas accommodation, and an annular chamber is formed between the outer tube and the cylinder for gas flow; A first sealing member is disposed in the first end of the outer tube. The interior of the first sealing member has a first through hole extending along the longitudinal direction and a first through hole connecting the first through hole and the chamber. Passage, the first perforation includes a valve port communicating with the air chamber of the cylinder; A second sealing member is disposed in the second end of the outer tube. The interior of the second sealing member has a second through hole extending along the longitudinal direction and a second channel communicating with the chamber, wherein the cylinder The body is combined between the first sealing member and the second sealing member so that the air chamber of the cylinder can communicate with the first channel and the second channel; A piston rod, which includes an inner end extending into the outer tube and an outer end outside the outer tube. The inside of the piston rod has a rod hole extending along the longitudinal direction. The inner end of the piston rod a second perforation passing through the second seal; A piston is provided in the cylinder and combined with the inner end of the piston rod. The interior of the piston has a gas channel extending along the longitudinal direction. The gas channel connects the rod hole of the piston rod and the gas hole of the cylinder. chamber, so that gas can enter the gas chamber of the cylinder through the rod hole of the piston rod and the gas channel; A control pin is movably disposed in the first through hole of the first sealing member to close or open the valve port of the first sealing member. When the control pin closes the valve port, the air in the air chamber Gas cannot flow to the first channel of the first seal. When the control pin opens the valve port, the gas in the air chamber can flow to the first channel of the first seal through the valve port, and then to the first channel of the first seal. The chamber between the outer tube and the cylinder; and A gas nozzle is provided on the piston rod and communicates with the rod hole, so that gas can be driven into the rod hole of the piston rod through the gas nozzle to adjust the gas pressure in the gas chamber. The height adjustment device with air pressure buffering as claimed in claim 1, wherein the control pin has a sealing portion in the air chamber, and when the control pin moves in the first through hole, the sealing portion can be closed or Open the valve. As claimed in claim 1, the height adjustment device with air pressure buffering, wherein the second channel includes a communication port at one end of the second sealing member and connected with the air chamber of the cylinder. The height adjustment device with air pressure buffering as claimed in claim 1, wherein the rod hole penetrates from the inner end of the piston rod to the outer end of the piston rod. The height adjustment device with air pressure buffering as described in claim 4, wherein the air nozzle is provided at the outer end of the piston rod. The height adjustment device with air pressure buffering as claimed in claim 1, wherein the piston has a first part with a large diameter and a second part with a small diameter, and the outer periphery of the first part is against the inner wall of the cylinder. , the second part is inserted into the inner end of the piston rod, and the outer periphery of the second part abuts against the inner wall of the piston rod. The height adjustment device with air pressure buffering as claimed in claim 6, wherein the gas channel penetrates from the first part of the piston to the second part of the piston. The height adjustment device with air pressure buffering as described in claim 1, wherein the first end of the outer tube is provided with a connecting seat, which can be assembled below the bicycle seat cushion, and the top of the connecting seat is provided with an opening. The upper end of the control pin is located in the opening. The height adjustment device with air pressure buffering as described in claim 1 further includes a seat tube and a support tube. One end of the seat tube is provided with a connecting seat. The connecting seat can be assembled under the bicycle seat cushion. The connecting seat There is an opening at the top, the outer tube is installed inside the seat tube and the upper end of the control pin is located in the opening. The support tube is used to connect with a bicycle frame. There is a positioning seat inside the lower end of the support tube. The outer end of the piston rod is combined with the positioning seat.

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