TWI638740B - Bicycle seat tube lifting device - Google Patents

Abstract

A seat tube lifting device for a bicycle is mainly provided in a space where the air chamber is disposed between the inner tube and the floating piston, and the air chamber is not passed through the axial displacement stroke of the striker, thereby increasing the space of the air chamber and reducing the space. The gas pressure inside the gas chamber is used to reduce the number of airtight components and the air leakage rate, and to make the seat height adjustment and control more labor-saving.

Description

Bicycle seat tube lifting device

The invention relates to a seat tube lifting device for a bicycle, in particular, the utility model has the advantages of small operation pressure and labor-saving effect when the seat tube height is adjusted and adjusted, and has the advantages of less sealing elements and good sealing performance.

According to the US9878754B2, Taiwan invention patent number I570012 "Bicycle seat tube height adjustment mechanism" patent case, is the patent application filed by the applicant (hereinafter referred to as the conventional patent case), and is also a mechanism that can adjust the height of the bicycle seat tube. The structure of the conventional patent case is shown in Figures 1 to 5. The seat tube height adjusting mechanism 1 of the conventional patent case includes an inner tube 10, an outer tube 11, an actuating unit 12 and a control unit 13. The inner tube 10 has a first end 101 and an opposite second end 102. The first end 101 extends into the interior of the outer tube 11, and the second end 102 extends out of the outer tube 11. And a connecting seat 103 is provided to connect the seat cushion of a bicycle. The interior of the second end 102 is fixed to the fixing base 104 by screwing.

The outer tube 11 has an upper end 110 and a lower end 111. The inner end of the upper end 110 is embedded in the first end 101, and the outer wall has a fixing ring 112 fixed to the riser of the bicycle to keep the outer tube 11 stationary. The nozzle of the lower end 111 is sealed by a mouth ring 113.

2 and 3, the actuating unit 12 is disposed in the space formed by the inner tube 10 and the outer tube 11, and includes a first tube 120, a second tube 121, a piston 122, and a striker 123. The lower end of the first tube 120 is fixed to the top end of the sealing ring 113, and the opposite upper end extends into the inner portion of the inner tube 10 (as shown in FIG. 3). The upper end of the tube is fixedly connected with an upper joint 1201. The second tube 121 is located inside the first tube 120, and has a tube length smaller than the first tube 120. The top end of the second tube 121 is fixed to the upper coupling seat 1201, and the bottom end is fixed to a valve seat 1210. The central position of the valve seat 1210 (as shown in FIG. 3A) has an axially extending shaft hole 1214. The circumferential side of the shaft hole 1214 is provided with a plurality of valve ports 1211 which are also axially disposed. The shaft hole 1214 is located at the valve seat. The bottom end position of the 1210 is a seating groove 1212 having a larger inner diameter, and the outer wall of the seating groove 1212 has a radially disposed oil hole 1213. A float piston 1202 is disposed inside the first tube 120 and between the valve seat 1210 and the sealing ring 113. A space between the first tube 120 and the second tube 121 and located above the floating piston 1202 is defined as a first oil chamber 124. The space inside the second tube 121 is defined as a second oil chamber 125, and the first and second oil chambers 124, 125 are filled with oil respectively. The inside of the first tube 120 between the floating piston 1202 and the sealing ring 113 is a gas chamber 126 which is filled with a gas of a set pressure. The piston 122 is located inside the second tube 121. The top end is connected to a piston rod 1220. The top end of the piston rod 1220 is fixed to the fixing base 104 through the upper joint 1201, so that the piston 122 and the inner tube are fixed. 10 integrated. The striker 123 is disposed under the second tube 121 inside the first tube 120. The top end passes through the shaft hole 1214 and is fixed with a valve piece 1230. The bottom area of the valve piece 1230 can block all. The top port of the valve port 1211 (Fig. 3A). The outer wall of the striker 123 in the positioning groove 1212 has a neck portion 1231 having a small outer diameter. The outer side of the neck portion 1231 is sleeved with a spring 1232 having a force for pushing the striker 123 downward. The valve plate 1230 always maintains the force of blocking the valve port 1211 downward. The bottom end of the striker 123 passes through the floating piston 1202, the air chamber 126, and the sealing ring 113, and is positioned below the sealing ring 113.

The control unit 13 is fixed under the bottom end of the striker 123 and can be connected to the control unit 13 via one end of a control line 130 (such as a steel cable). The other end of the control line 130 is controlled on the bicycle handlebar. The wrench is connected. The control unit 13 is provided with an eccentric plate 131 which is eccentrically pivotally positioned, and an urging block 132 for pushing the eccentric plate 131 to eccentrically pivot an angle. One end of the pushing block 132 is connected to the control line 130. An operating end 1310 of the eccentric plate 131 is in contact with the bottom end of the striker 123.

To adjust the height of the seat cushion, the control puller on the handle of the bicycle is pulled, that is, the offset of the pusher eccentric plate 131 can be controlled to push the thrust pin 123 to compress the spring 1232 upward, so that the valve plate 1230 Upwardly exiting the valve port 1211 (i.e., opening the valve), the first oil chamber 124 is formed to communicate with the second oil chamber 125 (Fig. 4). Thereafter, the seat cushion is depressed, and the piston 122 moves downward with the inner tube 10, and the oil in the second oil chamber 125 is squeezed into the first oil chamber 124 through the valve port 1211 and the oil hole 1213 (see FIGS. 5 and 5A). When the height adjustment of the seat cushion reaches the desired height, the control puller is loosened, and the striker pin 123 is pushed back to the original position by the spring 1232, and the valve plate 1230 is restored to block the valve port 1211, so that the oil in the first and second oil chambers 124, 125 is restored. The liquid does not communicate, so the cushion height is fixed. Conversely, if the height of the seat cushion is to be raised, the control wrench on the handle of the bicycle is pulled to control the opening of the valve port 1211, so that the seat cushion, the inner tube 10 and the piston 122 are pulled upward to make the first oil chamber The oil in 124 flows into the second oil chamber 125, and the seat cushion position can be fixed until the control puller is released.

The above-mentioned conventional patent case has the following drawbacks in application and needs to be improved. 1. The air chamber 126 is separated by a first tube 120, a floating piston 1202, and a sealing ring 113. The first tube 120 is disposed outside the inner tube 10, and the first tube 120 also has a tube. The wall, resulting in a relatively small reduction in the space constituting the plenum 126, requires a relatively large gas pressure to fill the smaller space of the plenum 1202. This larger value of gas pressure requires more and more stringent airtightness requirements (for example, the amount of airtight components needs to be increased), and the air leakage rate is also high due to the large air pressure. 2. The bottom end of the striker 123 is located below the floating piston 1202, the air chamber 126 and the sealing ring 113, and is located below the sealing ring 113. The air pressure of the air chamber 126 is large, which may cause the control wrench on the handle of the bicycle to be pulled. When the thrust pin 123 is displaced axially upward, a large operation force is required, and thus, there is a lack of difficulty in operation. The present inventors have made the above-mentioned deficiencies in application in view of the above-mentioned conventional patents, and have been designed and improved, and the present invention has been produced.

Therefore, the main object of the present invention is to provide a bicycle which can increase the space of the air chamber, reduce the gas pressure inside the air chamber, reduce the airtight component and the air leakage rate, and make the seat height adjustment and control more labor-saving. Seat tube lifting device.

The main feature of the present invention is that the air chamber is disposed in a space partitioned between the inner tube and the floating piston, and the air chamber is not displaced when the needle is axially displaced, thereby improving the above-mentioned lack of the conventional patent case. .

The technical means and structure used in the present invention for achieving the above objects and effects will be described below by way of the following examples.

Referring to FIGS. 6 to 10, the seat tube height adjusting mechanism 2 of the embodiment of the present invention includes an inner tube 20, an outer tube 21, an actuation unit 22, and a control unit 23. The inner tube 20 has a first end 201 and an opposite second end 202. The first end 201 extends into the outer tube 21, and the second end 202 extends out of the outer tube 21. A connector 203 is disposed outside the tube to connect the seat cushion of a bicycle. The inside of the second end 202 is screwed to a valve seat 204, and the nozzle of the second end 202 is closed.

The outer tube 21 has an upper end 210 and a lower end 211. The inner end of the upper end 210 is embedded with the first end 201. The outer wall has a fixing ring 212 fixed to the riser of the bicycle to keep the outer tube 21 stationary. The nozzle of the lower end 211 is sealed by a mouth ring 213.

The actuating unit 22, as shown in Figs. 7 and 8, is disposed in an inner space partitioned by the inner and outer tubes 20, 21 after being joined. The utility model comprises a oil pipe 220, an oil sealing plug 221, a pipe socket 222, a floating piston 223, a piston 224 and a striker 225. The oil pipe 220 is disposed inside the inner pipe 20, and the top pipe port is closed by the oil sealing plug 221, and the bottom end pipe port is fixed to the sealing pipe seat 222. The nozzle end of the lower end 201 of the inner tube 20 is also fixed to the sealing tube seat 222, so that the inner tube 20, the oil tube 220 and the sealing tube seat 222 can be axially displaced integrally. The floating piston 223 is located in the inner tube 20 between the oil seal plug 221 and the gas valve seat 204. The inner tube 20 between the floating piston 223 and the gas valve seat 204 is separated by an air chamber 226. The plenum 226 can be filled with gas via the valve seat 204. The piston 224 is disposed inside the oil pipe 220. The bottom end is connected with a support tube 2240 passing down the sealing tube seat 222, and then fixed to the sealing ring 213, so that the piston 224 is supported in the inner tube 20. Stay still. The axial position of the piston 224 has a through hole 2241. The inside of the shaft hole 2241 has a seating groove 2242 having an enlarged inner diameter from a middle position. The striker 225 is disposed in the support tube 2240. After the top end passes through the shaft hole 2241, a valve piece 2250 is fixed, and the bottom end passes through the sealing tube seat 222 and the sealing ring 213, and is located below the sealing ring 213. . The striker 225 is located outside the section of the positioning groove 2242 and is sleeved with a spring 2251 having a force for pushing the striker 225 downward, so that the valve plate 2250 has a hole wall and a striker 225 for the shaft hole 2241. The function of the valve port 2252 between the outer walls is blocked (Fig. 8A). The oil pipe 220 is located on the outer wall of the pipe below the piston 224, and is provided with a plurality of radial oil holes 2201. By the arrangement of the oil holes 2201, the oil pipe 220 is located in a space below the piston 224, and the inner pipe And the gap between the oil pipes 220 communicates with each other to form a first oil chamber 227. The oil pipe 220 is located inside the oil seal 221 and the piston 224, and constitutes a second oil chamber 228. The first oil chamber 227 and the second oil chamber 228 are filled with oil.

The control unit 23 is for controlling the actuation or stopping of the actuation unit 22. It is fixed below the bottom end of the striker 225 and can be connected to the control unit 23 via one end of a control wire 230 (such as a cable), the other end of which is connected to a control puller on the bicycle handle. The control unit 23 is provided with an eccentric plate 231 which is eccentrically pivotally positioned, and an urging block 232 for pushing the eccentric plate 231 to eccentrically pivot an angle. One end of the pushing block 232 is connected to the line end 2300 of the control line 230. An operating end 2310 of the eccentric plate 231 is in contact with the bottom end of the striker 225.

To adjust the height of the seat cushion, the control puller on the handle of the bicycle is pulled, that is, the thrusting block 232 can be controlled to push the eccentric plate 231 to be offset, and the actuating end 2310, that is, the push pin 225, the compression spring 251 is axially displaced upward to make the valve The sheet 2250 then exits the valve port 2252, forming a first oil chamber 227 that communicates with the second oil chamber 228 (as in Figures 9, 10, 10A). After that, the seat cushion 10 is pressed down (ie, in the direction of the arrow in FIG. 10), the inner tube 10 is moved down synchronously with the oil tube 220 and the sealing tube seat 222, and the piston 224 is kept stationary. At this time, part of the oil in the second oil chamber 228 is caused by The downward movement of the oil pipe 220 and the immovable effect of the piston 224 are pushed into the first oil chamber 227 through the valve port 2252. The greater the pressure of the squeeze, the hydraulic fluid pushes the floating piston 223 upwards into the compressed gas chamber 226. The gas is shown in Figure 10. When the height adjustment of the seat cushion reaches the desired height, the control puller is loosened, and the striker 225 is pushed back to the original position by the spring 2251, and the valve plate 2250 is restored to block the valve port 2252, so that the oil in the first and second oil chambers 227 and 228 is filled. The liquid is no longer interconnected, so the cushion height is fixed. Conversely, if the height of the seat cushion is to be raised, the control lever on the handle of the bicycle is pulled to control the opening of the valve port 2252, so that the seat cushion, the inner tube 20 and the oil pipe 220 are pulled upward to make the first oil chamber A portion of the oil in 227 flows into the second oil chamber 228 until the seat cushion is secured by releasing the control pull.

The above structural improvement of the present invention has at least the following effects in application. 1. The gas chamber 226 of the present invention is directly partitioned from the wall of the inner tube 20, and the gas chamber 126 of the prior art is separated by the first tube 120 located in the inner tube 10. Since the first tube 120 also has a tube wall, the space constituting the air chamber 126 is relatively reduced. In the case of a predetermined air pressure value supporting the floating piston, the smaller space of the gas chamber 126 of the prior patent case must be filled with a larger gas pressure. This larger value of gas pressure requires more and more stringent airtightness requirements (for example, the amount of airtight components needs to be increased), and the air leakage rate is also high due to the large air pressure. In contrast, the gas chamber 226 of the present invention has a large space, which can reduce the gas pressure inside the gas chamber 226, so that the airtight component and the air leakage rate can be reduced compared with the conventional patent case. 2. The air chamber 226 of the present invention is not positioned in the axial displacement of the striker 225, so that the control unit 23 does not need to have a control force against the internal air pressure of the air chamber 226 when the drive striker 225 is axially displaced. The control unit 23 can be more labor intensive in operation.

In summary, the present invention is not only novel, but also has industrial applicability, and is filed according to law, and is requested to review and approve the patent.

(previous part)

1‧‧‧Seat tube height adjustment mechanism

10‧‧‧Inside

11‧‧‧External management

12‧‧‧Operating unit

13‧‧‧Control unit

101‧‧‧ first end

102‧‧‧ second end

103‧‧‧Connecting seat

104‧‧‧ Fixed seat

110‧‧‧Upper

111‧‧‧Bottom

112‧‧‧Fixed ring

113‧‧‧ Sealing ring

120‧‧‧ first tube

121‧‧‧Second tube

122‧‧‧Piston

123‧‧‧Scill

1201‧‧‧上上座

1210‧‧‧ valve seat

1211‧‧‧ valve port

1212‧‧‧Setting trough

1213‧‧‧ oil hole

1214‧‧‧Axis hole

1202‧‧‧Floating piston

124‧‧‧First Oil Room

125‧‧‧Second oil room

126‧‧‧ air chamber

1220‧‧‧ piston rod

1230‧‧‧ Valves

1231‧‧‧ neck

1232‧‧ ‧ spring

130‧‧‧Control line

131‧‧‧Eccentric board

132‧‧‧Top push block

1310‧‧‧ actuation

(part of the invention)

2‧‧‧Seat tube height adjustment mechanism

20‧‧‧Inside

21‧‧‧External management

22‧‧‧Operating unit

23‧‧‧Control unit

201‧‧‧ first end

202‧‧‧ second end

203‧‧‧Connecting seat

204‧‧‧ gas valve seat

210‧‧‧Upper

211‧‧‧Bottom

212‧‧‧Fixed ring

213‧‧‧ Sealing ring

220‧‧‧ oil pipe

221‧‧‧ oil seal

222‧‧‧ Sealing seat

223‧‧‧floating piston

224‧‧‧Piston

225‧‧‧Needle

226‧‧ ‧ air chamber

2240‧‧‧Support tube

2241‧‧‧Axis hole

2242‧‧‧Setting trough

2250‧‧‧ Valves

2251‧‧ ‧ spring

2252‧‧‧ valve port

2201‧‧‧ oil hole

227‧‧‧First Oil Room

228‧‧‧Second oil room

230‧‧‧Control line

2300‧‧‧ line end

231‧‧‧Eccentric board

232‧‧‧

2310‧‧‧ actuation

Figure 1 is a perspective view of a conventional patent case. Figure 2 is a plan exploded view of a conventional patent case. Figure 3 is a cross-sectional view of the combination of the conventional patent case (valve closed). Fig. 3A is an enlarged view of a portion 3A of Fig. 3. Fig. 4 is a view showing the open state of the valve port of the conventional patent case. Fig. 5 is a view showing a state in which the valve port is opened in the conventional patent case and the inner tube (seat) is pressed down. Fig. 5A is an enlarged view of a portion 5A of Fig. 5. Fig. 6 is a perspective view showing an embodiment of the present invention. Figure 7 is a plan exploded view of an embodiment of the present invention. Figure 8 is a cross-sectional view of the assembly (valve closed) of an embodiment of the present invention. Fig. 8A is an enlarged view of a portion 8A of Fig. 8. Fig. 9 is a view showing a state in which the valve port is opened in the embodiment of the present invention. Fig. 10 is a view showing a state in which the valve port is opened and the inner tube (seat) is pressed down in the embodiment of the present invention. Fig. 10A is an enlarged view of a portion 10A of Fig. 10.

Claims (5)

A seat tube lifting device for a bicycle, comprising an inner tube, an outer tube, an actuating unit and a control unit; wherein the bottom end of the inner tube is inserted into the inner portion of the outer tube by the top end of the outer tube; The unit is disposed in an inner space separated by the inner and outer tubes; the control unit is configured to control the actuation or stop of the actuating unit; and the actuating unit comprises a tubing and an oil plug a tube seat, a floating piston, a piston and a striker; the oil pipe is disposed inside the inner pipe, the top pipe port is closed by the oil seal, and the bottom pipe mouth is fixed to the seal pipe seat; The lower end nozzle of the tube is also fixed to the sealing tube seat, and the inner tube, the oil tube and the sealing tube seat are integrally axially displaced when being applied; the floating piston is located in the inner tube above the oil sealing plug The inner portion of the inner tube is located between the floating piston and the closed end of the inner tube, and is separated by a gas chamber filled with a gas of gas pressure; the piston is inserted inside the oil pipe, and the bottom end is connected There is a support tube that goes to After passing through the sealing tube seat, indirectly fixed to the bottom end of the outer tube, the piston is supported in the inner tube; the axial position of the piston has a through hole, and the needle is worn in the shaft In the support tube, the top end of the striker passes through the shaft hole and is fixed with a valve piece. After the bottom end of the striker passes through the seal tube seat, it is located below the outer tube and is axially thrusted by the control unit. Controlling or stopping; the striker is coupled to a spring having a force for pushing the striker downward to cause the valve plate to have a valve port blockage formed by a gap between the hole wall of the shaft hole and the outer wall of the striker The space under the piston is intercommunicated with the gap between the inner tube and the oil pipe to form a first oil chamber; the oil tube is located inside the oil seal plug and the piston to form a first In the second oil chamber, the first oil chamber and the second oil chamber are filled with oil, and are controlled to open or close via the valve port to control the flow of oil in the first and second oil chambers to adjust the seat tube. Lifting or positioning. The seat tube lifting device of the bicycle of claim 1, wherein the top end of the inner tube is closed by a gas valve seat, and the gas chamber can be filled with gas through the gas valve seat. The seat tube lifting device of the bicycle of claim 1, wherein the inside of the shaft hole has a positioning groove with an enlarged inner diameter from a middle position, the spring is disposed in the positioning groove for the striker to pass through, Pushing the force of the striker down causes the valve to block the valve port. The seat tube lifting device of the bicycle of claim 1, wherein the bottom end of the outer tube is fixed with a mouth ring, the sealing ring is fixed for the bottom end of the support tube, and the bottom end of the striker is passed through . The seat tube lifting device of the bicycle of claim 1, wherein the control unit is fixed below the bottom end of the striker, and the control unit is controlled to be activated or stopped via one end of a control line connected to the control unit; The unit is provided with an eccentric plate and an eccentric block which are eccentrically pivotally positioned, and the urging block is capable of pushing the eccentric plate to eccentrically pivot at an angle, and one end of the push block is opposite to the control line The wire end connection, an actuation end of the eccentric plate is in contact with the bottom end of the striker.