TWM502615U - Automatic lifting device of seat post - Google Patents

Abstract

An automatic lifting device of seat post adapted for bicycle is provided. The automatic lifting device includes a seat tube, a retractable seat post, a sensor and a control module. The seat tube is locked to a frame stand tube of the bicycle. The retractable seat post passes through the seat tube, wherein the retractable seat post has a first end fixed in the seat tube and a second end located out of the seat tube. The sensor is used for sensing a riding state of the bicycle and transmits a signal. The control module is used for receiving and analyzing the velocity signal and controls a height of the retractable seat post according to the signal.

Description

Seat rod automatic lifting device

The present invention relates to an automatic lifting device, and in particular to an automatic lifting device for a bicycle.

With the rapid development of science and technology, the material culture and quality of life have been continuously improved, and sports and leisure activities have become a trend. In recent years, bicycle sports have become increasingly popular. Among them, road bikes are popular among consumers because of their compact appearance, eye-catching appearance, and a better sense of speed when riding. In order to improve the pedaling efficiency and reduce the sports injury, the customized geometric setting of the car is more important, and the height of the seat cushion is the most affected.

In detail, the height of the seat cushion affects the degree of extension of the leg when the rider steps on it. If the height of the seat cushion is too low, the leg muscles cannot be fully extended when the pedal is swung, and thus the efficiency cannot be made. And a strong pedaling, it is easy to cause fatigue in the legs. If the height of the seat cushion is too high, it is also impossible to make an efficient and powerful pedaling. At the same time, due to excessive muscle stretching during pedaling, it is easy to cause leg cramps and even sports injuries. The height setting of the common seat cushion is mostly based on the rider's buttocks riding on the seat cushion and only on the tip of the toes. For most of the For the first-class rider, during the process of decelerating until it is completely stopped, the hips are not moved away from the seat cushion so that the soles of the feet are completely grounded, thereby improving the stability of the stop. Therefore, in the case where most of the first-stage riders are unfamiliar or do not know how to park correctly and safely, it is easy to cause a crash.

The novel creation provides an automatic lifting device for the seat rod, which can improve the safety of the first-class rider when riding the bicycle.

The novel creation proposes an automatic lifting device for the seat rod, which is suitable for bicycles. The seat rod automatic lifting device comprises a seat tube, a telescopic seat rod, a sensor and a control module. The seat tube lock is attached to the frame riser of the bicycle. The telescopic seat rod is disposed through the seat tube, wherein the telescopic seat rod has a first end fixed in the seat tube and a second end portion located outside the seat tube. The sensor is used to sense the riding state of the bicycle and emit a signal. The control module is configured to receive the signal and control the height of the telescopic rod according to the signal.

In an embodiment of the present invention, the sensor is a speed sensor adapted to sense the riding speed of the bicycle and emit a speed signal.

In an embodiment of the present invention, the telescopic seat bar further has a control valve located at the first end or the second end, and the control module is disposed corresponding to the control valve. When the control module determines that the riding state of the bicycle meets a predetermined condition, the control module opens the control valve.

In an embodiment of the present invention, the seat tube has a nozzle and the nozzle is located between the first end and the second end. When the control module judges to read the bicycle When the riding state does not meet the preset condition, there is a first height difference between the second end and the nozzle. When the control module determines that the riding state of the bicycle meets the preset condition, the second end portion has a second height difference from the nozzle, and the second height difference is smaller than the first height difference.

In an embodiment of the present invention, when the control valve is opened and a force directed toward the nozzle is applied to the second end, the second end moves toward the nozzle.

In an embodiment of the present invention, when the control valve is opened and the force is removed from the second end, the second end moves away from the nozzle.

In an embodiment of the present invention, the automatic lifting device further includes a distance sensor electrically coupled to the control module for sensing a distance between the second end and the nozzle, and Send the distance signal to the control module. When the control module determines that the distance between the second end and the nozzle is equal to the first height difference, the control module closes the control valve.

In an embodiment of the present invention, the control module is turned off after a preset time when the control valve is opened and the force is removed from the second end to move the second end away from the nozzle. Control valve.

In an embodiment of the novel creation, the control module includes a controller and an actuator. The controller is electrically coupled to the sensor for receiving and analyzing the signal to determine the riding shape of the bicycle. The actuator is electrically coupled to the controller and is disposed corresponding to the control valve. When the controller determines that the riding state of the bicycle meets the preset condition, the controller sends a control signal to the actuator to push the actuator against the control valve to open the control valve.

In an embodiment of the novel creation, the preset condition is a bicycle The riding speed, and the aforementioned riding speed is less than or equal to 5 km/h.

In an embodiment of the novel creation, the preset condition is the riding speed of the bicycle, and the foregoing riding speed is equal to 0 km/hour.

In an embodiment of the present novel creation, the telescopic seat bar includes a cylinder block and a piston rod. The piston rod has a piston portion and a fixing portion with respect to the piston portion, wherein the piston portion is coupled to the cylinder block, and the control valve is disposed at the fixing portion.

In an embodiment of the present invention, the control valve is located at the first end, and the fixing portion is fixed in the sitting tube.

In an embodiment of the present invention, the control valve is located at the second end and the cylinder is fixed within the seat tube.

In an embodiment of the present invention, the sensor includes a cadence sensor, a slope sensor, a gravity sensor, a GPS locator, a power sensor, or a brake actuation sensor.

Based on the above, the automatic sitting and lifting device of the present invention can sense the riding state of the bicycle through the sensor, and synchronously emit corresponding signals according to the change of the riding state of the bicycle, wherein the signal is controlled by the control module. After receiving and further analyzing, when the control module determines that the riding state of the bicycle meets the preset condition, the control module drives the telescopic seat bar to control the height of the telescopic seat bar. The signal can be a speed signal, a cadence signal, a slope signal, a shock signal, a position signal, a power signal or a brake signal, which reflects the instantaneous riding state of the bicycle, and the aforementioned preset condition is an instantaneous riding state for the bicycle. The parameter settings made. For example, when the control module judges that the bicycle is about to stop or stops completely At this time, the height of the telescopic seat bar is instantly lowered, so that the rider riding on the seat cushion can fully land with the sole of the foot, thereby improving the stability of the stop and the like, and helping to improve the ride of the first-class rider. Safety when cycling.

The above described features and advantages of the present invention will become more apparent and understood from the following description.

10‧‧‧Bicycle

11‧‧‧Seat tube bundle

12‧‧‧Rack riser

13‧‧‧ rear fork

14‧‧‧ Front fork

15‧‧‧Back fork

16‧‧‧Cushion

100, 100A‧‧‧ seat rod automatic lifting device

110‧‧‧Sitting

111‧‧‧ nozzle

120, 120a‧‧‧ telescopic seat

121‧‧‧First end

122‧‧‧second end

123‧‧‧Control valve

124‧‧‧Cylinder block

125‧‧‧ piston rod

125a‧‧‧Piston Department

125b‧‧‧Fixed Department

126‧‧‧ sleeve

130‧‧‧Speed sensor

140‧‧‧Control Module

141‧‧‧ Controller

142‧‧‧Actuator

150‧‧‧ distance sensor

D1, D2‧‧‧ direction

F‧‧‧force

H1‧‧‧first height difference

H2‧‧‧second height difference

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the assembly of an automatic lifting device for a seat rod assembled to a bicycle according to an embodiment of the present invention.

Figure 2 is a partial cross-sectional view of the seat rod automatic lifting device of Figure 1.

Figure 3 is a partial cross-sectional view showing the control valve of the seat rod automatic lifting device of Figure 2 being opened.

Fig. 4 is a partial cross-sectional view showing the automatic lifting device of the seat lever according to another embodiment of the present invention.

Figure 5 is a partial cross-sectional view showing the control valve of the seat rod automatic lifting device of Figure 4 being opened.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the assembly of an automatic lifting device for a seat rod assembled to a bicycle according to an embodiment of the present invention. Figure 2 is a partial cross-sectional view of the seat rod automatic lifting device of Figure 1. Referring to FIG. 1 and FIG. 2, in the embodiment, the seat rod automatic lifting device 100 is suitable for The bicycle 10, wherein the bicycle 10 can be a road car, a mountain bike, a time car or other vehicle type, is not limited to the road car shown in FIG. The seat rod automatic lifting device 100 includes a seat tube 110, a telescopic seat rod 120, a sensor 130, and a control module 140. The seat tube 110 is firmly locked to the frame riser 12 of the bicycle 10, for example, through the seat tube bundle 11. Therefore, it is possible to prevent the seat tube 110 from slipping relative to the frame riser 12.

The telescopic seat bar 120 is disposed through the seat tube 110 , wherein the telescopic seat bar 120 has a first end portion 121 fixed in the seat tube 110 and a second end portion 122 located outside the seat tube 110 , and is disposed at the first end portion 121 . There is a control valve 123. Here, the telescopic seat bar 120 is, for example, a gas pressure bar, which includes a cylinder 124 and a piston rod 125. The piston rod 125 has a piston portion 125a and a fixing portion 125b with respect to the piston portion 125a. The piston portion 125a is coupled to the cylinder 124. And the control valve 123 is provided in the fixing portion 125b. Since the control valve 123 is disposed on the fixing portion 125b and located at the first end portion 121, the fixing portion 125b of the piston rod 125 is also located in the seat tube 110 and is locked, for example, in the seat tube 110. On the other hand, the telescoping seat 120 cylinder 124 is, for example, fixed in the sleeve 126, and the sleeve 126 is movably coupled to the seat tube 110 such that the cylinder 124 can follow the sleeve 126 relative to the seat tube 110. mobile.

Generally, the cylinder 124 may have a negative air chamber (not shown), a two-phase communicating chamber (not shown), and a fluid flowing between the two chambers (not shown) (not shown). The negative air chamber (not shown) can constantly provide the upward force of the telescopic seat 120 and is independent of the two chambers (not shown).

The sensor 130 is, for example, a rear lower fork 13 mounted on the frame for sensing the riding state of the bicycle 10, and is synchronized with the change of the riding state of the bicycle 10. The corresponding signal is output. For example, the sensor 130 may be a speed sensor adapted to sense the riding speed of the bicycle 10, but the novel creation is not limited thereto. On the other hand, although the embodiment is described in which the sensor 130 is mounted on the rear fork 13 of the frame, in other embodiments, the sensor 130 can also be mounted on the front fork 14 of the frame. The rear upper fork 15 of the frame or his proper position, this novel creation does not limit this.

Figure 3 is a partial cross-sectional view showing the control valve of the seat rod automatic lifting device of Figure 2 being opened. Referring to FIG. 1 to FIG. 3 , the control module 140 is disposed corresponding to the control valve 123 for receiving and analyzing the signal sent by the sensor 130 and controlling the height of the telescopic seat 120 according to the foregoing signal. When the control module 140 determines that the riding speed of the bicycle 10 meets the preset condition, the control module 140 opens the control valve 123 to drive the telescopic seat 120 to actuate, thereby adjusting the seat cushion 16 assembled on the second end portion 122. the height of. Since the sensor 130 of the present embodiment may be a speed sensor, it transmits a speed signal to the control module 140 while sensing the riding speed of the bicycle 10, and the preset condition is, for example, riding for the bicycle 10. Parameter setting for speed. For example, when the control module 140 determines that the riding speed of the bicycle 10 is less than or equal to 5 km/hour, preferably equal to 0 km/hour, the control valve 123 is immediately opened to drive the telescopic seat 120 to actuate. The height of the seat cushion 16 can be immediately lowered before the bicycle 10 is about to stop or when it is completely stopped, so that the rider riding on the seat cushion 16 can completely land with the sole of the foot, thereby improving the stability at the time of stopping.

In detail, the seat tube 110 has a nozzle 111 and the nozzle 110 is located between the first end 121 and the second end 122. When the control module 140 determines that the riding state of the bicycle 10 (for example, the riding speed) does not meet the preset condition (for example, the bicycle 10 When the riding speed is greater than 5 km/h, the second end portion 122 and the nozzle 111 may have a first height difference h1. In this embodiment, the control module 140 includes a controller 141 and an actuator 142. The controller 141 is installed in the frame riser 12, for example, but the present invention is not limited thereto. The controller 141 is electrically coupled to the sensor 130. The control module 140 receives and analyzes the signal sent by the sensor 130 through the controller 141. On the other hand, the actuator 142 is electrically coupled to the controller 141, wherein the actuator 142 is, for example, a motor and is disposed corresponding to the control valve 123. When the controller 141 determines that the riding state (for example, the riding speed) of the bicycle 10 meets a preset condition (for example, when the riding speed of the bicycle 10 is less than or equal to 5 km/hour, preferably equal to 0 km/hour) The controller 141 sends a control signal to the actuator 142 to push the actuator 142 against the control valve 123 to open the control valve 123. At the same time, when the rider's weight is applied to the seat cushion 16 (i.e., the force F directed toward the nozzle 111 is applied to the second end portion 122), it is located in one of the chambers (not shown) of the cylinder 124. The fluid (not shown) will flow to another chamber (not shown) such that the cylinder 124 moves relative to the piston rod 125 with the piston rod 125 stationary and simultaneously drives the sleeve 126 relative to the seat tube 111. The movement is such that the second end portion 122 is movable toward the direction D1 close to the nozzle opening 111 such that the second end portion 122 and the nozzle opening 111 have a second height difference h2 that is less than the first height difference h1. It should be noted that, in the process that the control valve 123 is opened and the cylinder 124 is slid, once the control valve 123 is closed, the fluid (not shown) cannot continue to flow between the two chambers (not shown). In conjunction, the relative movement between the cylinder 124 and the piston rod 125 is immediately stopped.

On the other hand, when the control valve 123 is opened and the force F is from the second end When the 122 is removed, the fluid (not shown) can still flow between the two chambers (not shown), and since the negative air chamber (not shown) can constantly provide the upward force of the telescopic rod 120, the cylinder 124 is movable relative to the piston rod 125 with the piston rod 125 fixed, and simultaneously drives the sleeve 126 to move relative to the seat tube 111, so that the second end portion 122 as shown in FIG. 3 is moved away from the nozzle 111. The direction D2 (i.e., the reverse of the direction D1) moves and returns to the state shown in FIG.

Here, the lever automatic lifting device 100 further includes a distance sensor 150 electrically coupled to the controller 141 of the control module 140, wherein the distance sensor 150 is disposed on the seat tube 110 and adjacent to the nozzle 111, for example. The distance between the second end portion 122 and the nozzle 111 is sensed, and the distance signal is sent to the controller 141 of the control module 140. Although the present embodiment is described by the distance sensor 150 disposed on the seat tube 100 and adjacent to the nozzle 111, the new creation is not limited thereto. When the controller 141 of the control module 140 determines that the distance between the second end portion 122 and the nozzle 111 is equal to the first height difference h1, the controller 141 of the control module 140 sends a control signal to the actuator 142. The actuator 142 is stopped from pushing against the control valve 123 to close the control valve 123. Therefore, in the case where the control valve 123 is closed, fluid (not shown) in the cylinder 124 cannot flow between the two chambers (not shown) to lock the telescopic seat rod 120 and the second end portion. The distance between 122 and nozzle 111 maintains a first height difference h1. In another embodiment, when the control valve 123 is opened and the force F is removed from the second end portion 122 to move the second end portion 122 away from the nozzle port 111, the control module 140 is permeable. The controller (not shown) closes the control valve 123 after a predetermined time to lock the telescopic seatpost 120. In other words, during the resetting of the telescopic seatpost 120, The purpose of closing the control valve 123 by way of time control is not limited to the above-described method of distance sensing.

It should be particularly noted that the sensor of the present invention is not limited to the above-mentioned speed sensor. For example, the sensor may also include a cadence sensor, a slope sensor, a gravity sensor, and a GPS. Positioner, power sensor or brake actuation sensor. For example, the cadence sensor is adapted to send the cadence signal to the control module 140, and the corresponding preset condition is the cadence (or the return speed) of the rider. The cadence sensor can be selectively combined with the speed sensor. In this case, the preset condition needs to include parameter settings such as cadence and riding speed. When the control module 140 determines that the riding speed is 0 km/h and the cadence is 0 rpm, and the rider does not ride on the seat cushion 16 (ie, no force F is applied to the second At the end 122), it can be known that the rider has left, and the control valve 123 is opened to allow the lowered telescopic seatpost 120 to rise back to the initial height.

For example, the slope sensor is adapted to send the gradient signal to the control module 140, and the corresponding preset condition is the road gradient when riding. The slope sensor can be selectively combined with the speed sensor and the cadence sensor. In this case, the preset conditions include parameter settings such as road gradient, riding speed, and cadence. When the control module 140 determines that the road gradient at the time of riding is -5% or less, it can be known that the rider at this time slid rapidly on the steep slope, so the control module 140 temporarily ignores the parameters of the riding speed. The control valve 123 is set to open to lower the height of the telescopic seat post 120. On the other hand, when the control module 140 determines that the road gradient at the time of riding is +5% or more, it can be known that the rider at this time crawls uphill, and the control module 140 determines that the riding speed is greater than 10 After the km/h or the cadence is greater than 60 rpm, the control will be activated. The valve 123 is valved to return the lowered telescoping seatpost 120 to the initial height.

Moreover, taking the GPS locator as an example, it is suitable for transmitting the position signal to the control module 140, and the corresponding preset condition is the information of the destination. When the control module 140 determines that the rider is about to arrive or arrives at the destination, the control valve 123 is opened to lower the height of the telescopic seatpost 120.

For example, the power sensor is adapted to transmit a power signal to the control module 140, and the corresponding preset condition is the power output of the rider. When the control module 140 determines that the power output of the rider is less than 100 watts per hour, it can be known that the rider at this time may be too tired to open the control valve 123 to lower the height of the telescopic seatpost 120. This allows the rider to get a moderate rest. When the control module 140 determines that the power output of the read rider is higher than 100 watts/hour, the control valve 123 is opened again to return the lowered telescopic seatpost 120 to the initial height.

For example, the brake actuation sensor is adapted to send a brake signal to the control module 140, and the corresponding preset condition is whether the brake system is activated or not. When the control module 140 determines that the brake system is activated, the control valve 123 is appropriately opened or closed to adjust the height of the telescopic seatpost 120 to assist the rider's center of gravity.

For example, a gravity sensor (G-sensor) is used to transmit the shock signal to the control module 140, and the corresponding preset condition is the impact of the road surface feedback. When the control module 140 determines that the road surface feedback is a continuous impact, the control valve 123 is appropriately opened or closed to adjust the height of the telescopic seatpost 120. In this way, the effect of shock absorption can be obtained, and the impact of the road surface feedback is prevented from being directly transmitted to the rider's body.

Other embodiments are listed below for illustration. Must be stated here It is to be noted that the following embodiments use the same reference numerals and the parts of the foregoing embodiments, and the same reference numerals are used to refer to the same or similar elements, and the description of the same technical content is omitted. For the description of the omitted portions, reference may be made to the foregoing embodiments, and the following embodiments are not repeated.

Fig. 4 is a partial cross-sectional view showing the automatic lifting device of the seat lever according to another embodiment of the present invention. Referring to FIG. 4, the seat rod automatic lifting device 100A of the present embodiment is substantially similar to the seat rod automatic lifting device 100 of the above embodiment, but the main difference is that the control valve 123 of the telescopic seat rod 120a is located at the second end portion. 122, wherein the cylinder 126 is fixed in the seat tube 110, and the fixing portion 125b of the piston rod 125 is fixed in the sleeve 126. On the other hand, the actuator 142 of the seat lever automatic lifting device 100A is mounted, for example, at the top end of the sleeve 126, and the actuator 142 of the automatic lever lifting device 100 is not attached to the bottom of the seat tube 110, for example. In other words, the position of the actuator 142 depends on the control valve 123.

Figure 5 is a partial cross-sectional view showing the control valve of the seat rod automatic lifting device of Figure 4 being opened. Referring to FIG. 4 and FIG. 5, when the controller 141 determines that the riding state of the bicycle 10 meets the preset condition, the controller 141 sends a control signal to the actuator 142 to push the actuator 142 against the control valve 123. To open the control valve 123. At the same time, when the rider's weight is applied to the seat cushion 16 (i.e., the force F directed toward the nozzle 111 is applied to the second end portion 122), it is located in one of the chambers (not shown) of the cylinder 124. The fluid (not shown) will flow to another chamber (not shown) such that the piston rod 125 moves relative to the cylinder 124 while the cylinder 124 is stationary, and simultaneously drives the sleeve 126 relative to the seat tube. 111 moves so that the second end portion 122 can approach the nozzle 111 The direction D1 is moved such that the second end portion 122 and the nozzle 111 have a second height difference h2 that is smaller than the first height difference h1.

On the other hand, when the control valve 123 is opened and the force F is removed from the second end portion 122, fluid (not shown) can still flow between the aforementioned two chambers (not shown), and due to the negative air chamber (not shown) can provide the upward force of the telescopic seat 120, so that the piston rod 125 can move relative to the cylinder 124 while the cylinder 124 is stationary, and simultaneously drive the sleeve 126 to move relative to the seat tube 111. Thereby, the second end portion 122 as shown in FIG. 5 is moved in the direction D2 (ie, the reverse direction of the direction D1) away from the nozzle 111 to return to the state shown in FIG.

In summary, the automatic sitting and lifting device of the present invention can sense the riding state of the bicycle through the sensor, and synchronously emit corresponding signals as the riding state of the bicycle changes, wherein the signal is controlled by the control. The module receives and further analyzes. When the control module determines that the riding state of the bicycle meets the preset condition, the control module opens the control valve to drive the telescopic seat bar to act, thereby controlling the height of the telescopic seat pad. The signal can be a speed signal, a cadence signal, a slope signal, a shock signal, a position signal, a power signal or a brake signal, which reflects the instantaneous riding state of the bicycle, and the aforementioned preset condition is an instantaneous riding state for the bicycle. The parameter settings made. For example, when the control module judges that the bicycle is about to stop before or stops completely, the height of the telescopic seat bar is immediately lowered, so that the rider riding on the seat cushion can completely land with the sole of the foot, thereby improving the stoppage. The isochronous stability helps to improve the safety of the first-class rider when riding a bicycle. Also, after getting off the bike, the telescopic seat can automatically return to the initial height for the rider to follow. Riding.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the novel creation, and any person skilled in the art can make some changes without departing from the spirit and scope of the novel creation. Retouching, the scope of protection of this new creation is subject to the definition of the scope of the patent application attached.

100‧‧‧Side rod automatic lifting device

110‧‧‧Sitting

111‧‧‧ nozzle

120‧‧‧ Telescopic seat

121‧‧‧First end

122‧‧‧second end

123‧‧‧Control valve

124‧‧‧Cylinder block

125‧‧‧ piston rod

125a‧‧‧Piston Department

125b‧‧‧Fixed Department

126‧‧‧ sleeve

140‧‧‧Control Module

142‧‧‧Actuator

150‧‧‧ distance sensor

H1‧‧‧first height difference

Claims (15)

The utility model relates to an automatic lifting device for a seat rod, which is suitable for a bicycle. The automatic lifting device for the seat rod comprises: a seat tube, a frame riser attached to the bicycle; a telescopic seat rod, which is disposed in the seat tube, wherein the seat tube The telescopic seat rod has a first end fixed in the seat tube and a second end portion outside the seat tube; a sensor for sensing the riding state of the bicycle and emitting a signal; And a control module for receiving the signal and controlling the height of the telescopic seat rod according to the signal. The automatic lever lifting device according to claim 1, wherein the sensor is a speed sensor adapted to sense the riding speed of the bicycle and emit a speed signal. The seat rod automatic lifting device according to claim 1, wherein the telescopic seat rod further has a control valve at the first end or the second end, and the control module corresponds to the control valve And setting, when the control module determines that the riding state of the bicycle meets a predetermined condition, the control module opens the control valve. The seat rod automatic lifting device according to claim 3, wherein the seat tube has a nozzle, and the nozzle is located between the first end portion and the second end portion, when the control module interprets When the riding state of the bicycle does not meet the preset condition, the second end portion and the nozzle have a first height difference, and when the control module determines that the riding state of the bicycle meets the preset The second end and the nozzle when the condition is There is a second height difference between the two, and the second height difference is smaller than the first height difference. The seat rod automatic lifting device of claim 4, wherein when the control valve is opened and a force toward the nozzle is applied to the second end, the second end faces the tube The direction of the mouth moves. The seat rod automatic lifting device of claim 5, wherein when the control valve is opened and the force is removed from the second end, the second end moves away from the nozzle . The automatic lever lifting device of claim 6, further comprising: a distance sensor electrically coupled to the control module for sensing between the second end and the nozzle And transmitting a distance signal to the control module, when the control module determines that the distance between the second end and the nozzle is equal to the first height difference, the control module closes the control valve . The seat rod automatic lifting device of claim 5, wherein the control valve is opened and the force is removed from the second end to move the second end away from the nozzle The control module closes the control valve after a predetermined time. The automatic control device for the seat rod according to the third aspect of the invention, wherein the control module comprises: a controller electrically coupled to the sensor for receiving and analyzing the signal to determine the bicycle a ride state; and an actuator electrically coupled to the controller and configured to correspond to the control valve, when the controller determines that the riding state of the bicycle meets the preset condition, the control The controller sends a control signal to the actuator to urge the actuator against the control valve to open the control valve. The seat rod automatic lifting device according to claim 3, wherein the preset condition is a riding speed of the bicycle, and the riding speed is less than or equal to 5 km/hour. The seat rod automatic lifting device according to claim 3, wherein the preset condition is a riding speed of the bicycle, and the riding speed is equal to 0 km/hour. The automatic rod lifting device according to the third aspect of the invention, wherein the telescopic seat rod comprises a cylinder body and a piston rod, the piston rod has a piston portion and a fixing portion relative to the piston portion, the piston The portion is coupled to the cylinder, and the control valve is disposed at the fixing portion. The seat rod automatic lifting device according to claim 12, wherein the control valve is located at the first end portion, and the fixing portion is fixed in the seat tube. The seat rod automatic lifting device of claim 12, wherein the control valve is located at the second end, and the cylinder is fixed in the seat tube. The seat rod automatic lifting device according to claim 1, wherein the sensor comprises a cadence sensor, a slope sensor, a gravity sensor, a GPS locator, a power sensor or a brake. Detector.