TW202210345A - Bicycle adjustable seat post drives the actuating rod to move along its axial direction through motor driving cam for rotating, thereby connecting or disconnecting the first chamber and the second chamber - Google Patents

Abstract

A bicycle adjustable seat post includes a seat post assembly, a connecting base, a telescopic cylinder, and a control assembly, wherein the cylinder of the telescopic cylinder is connected to the outer tube of the seat post assembly, and a piston rod of the telescopic cylinder is connected to the inner tube of the seat post assembly such that the cylinder is divided into a first chamber and a second chamber. The connecting base is used connect with a bicycle saddle, and the connecting base includes a motor chamber. The control assembly includes a motor provided with a cam and an actuating rod, wherein the motor is located in the motor chamber, the actuating rod is located in the seat post assembly, and one end of the actuating rod is stretched into the motor chamber, and the cam leans against the actuating rod. When the cam is driven by the motor to rotate, the actuating rod may reciprocate along its axial direction so that the first chamber and the second chamber are connected or disconnected. When the first chamber is connected with the second chamber, the length of the seat post assembly may be adjusted, thereby adjusting the height of the saddle.

Description

bicycle adjustable seatpost

The invention relates to an adjustable bicycle seat tube; in particular, it refers to a wirelessly controlled bicycle adjustable seat tube structure.

The seat cushion of many advanced bicycles will be set on the seat tube whose length can be adjusted at any time, so that the rider does not need to get off the bike to manually adjust the height of the seat cushion, just by flipping the push switch on the handlebar, you can control the drop seat tube Adjust the length. In addition to improving the rider experience, this design is also more convenient and faster to use.

Please refer to FIG. 1 for a conventional bicycle adjustable seat tube 1 , the conventional bicycle adjustable seat tube 1 is pivoted to the seat tube 3 by a control rod 2 as a fulcrum, and the middle section is in contact with the valve rod 4 At one end, the end section abuts against the cam block 5, and uses a lever structure to drive whether the oil passage in the valve seat 6 is open or not.

When adjusting the height of the seat cushion, firstly press the start switch downward to start the motor 7. When the motor 7 is started, the drive shaft 8 of the motor 7 will drive the cam block 5 to rotate by a predetermined angle, so that the cam block 5 goes up Push the control rod 2, and then the control rod 2 will deflect and push the valve rod 4 upward, forcing the oil circuit in the valve seat 6 to be in an open state. The linear displacement of the seat tube 2 can further adjust the height of the seat cushion.

After adjusting the seat cushion to an appropriate height, the rider only needs to release the start switch, so that the drive shaft 8 of the motor 7 drives the cam block 5 to release the thrust on the control rod 2, and the return elastic member ( Not shown) will push the valve stem 4 downward to force the oil circuit in the valve seat 6 to be in a closed state, so as to complete the positioning of the seat stem 9 .

Although the conventional control rod, valve rod and cam block form a structural relationship of a labor-saving lever, the moving stroke of the valve rod is too short, and the oil path in the valve seat is too small when the oil path is in an open state, resulting in When adjusting the length of the seat tube, it is easy to be hindered by the fluid resistance in the valve seat, which is not conducive to the adjustment. In addition, if you want to maintain a proper oil passage space, you need to increase the size of the cam, so as to increase the movement stroke of the valve stem. However, this design change increases the volume and weight of the overall seat tube, which takes up more space. Therefore, it is necessary to solve the aforementioned problems.

In view of this, an object of the present invention is to provide an adjustable seat tube for bicycles, which is lightweight and convenient to use.

In order to achieve the above object, the bicycle adjustable seat tube provided by the present invention includes a tube assembly, a connecting seat, a telescopic cylinder and a control assembly. The seat tube assembly includes an outer tube and an inner tube whose outer diameter is smaller than the inner diameter of the outer tube, and the inner tube is at least partially disposed in the outer tube and can move along the axial direction of the outer tube, wherein the outer tube The pipe system is arranged in the frame of a bicycle. The connecting seat is disposed at one end of the inner tube and is used for connecting the seat cushion of the bicycle, and has a motor chamber and a battery chamber, and the motor chamber communicates with the inner space of the inner tube. The telescopic cylinder has a cylinder and a piston rod, wherein the cylinder is connected to the outer tube and has a fluid inside; the piston rod has a rod body and a piston head connected to the rod body, and the rod body is connected to the One end of the inner tube extends into the cylinder and is connected to the piston head; and the piston head divides the cylinder into a first chamber and a second chamber. The control assembly includes a motor, an actuating rod, a cam, a control circuit board and a battery; the motor is disposed in the motor chamber and has an output shaft; the actuating rod is disposed in the seat tube assembly and has one end Protruding into the motor chamber, the included angle between its axis and the axis of the output shaft is between 80 degrees and 100 degrees; the cam is arranged on the output shaft, and has a driving part in the circumferential direction; the driving part Abutting the actuating rod and driving the actuating rod to reciprocate along its axial direction between a first position and a second position; the driving part has a first part and a second part, and the first part reaches The shortest distance of the output shaft is smaller than the shortest distance from the second part to the output shaft; when the first part of the driving part abuts the actuating rod, the actuating rod is in the first position, so that the first chamber does not communicating with the second chamber; when the second part of the driving part abuts on the actuating rod, the actuating rod is in the second position, so that the first chamber communicates with the second chamber; the control circuit board is electrically connected The motor is used to control the rotation of the output shaft; the battery is arranged in the battery chamber and is electrically connected to the control circuit board.

The effect of the present invention is that the motor drives the cam to rotate to drive the actuating rod to move along its axial direction, thereby blocking or connecting the first chamber and the second chamber, so as to achieve the purpose of adjusting or fixing the length of the seat tube assembly. Secondly, the design of the angle between the axis of the output shaft of the motor and the axis of the actuating rod helps to save the output power of the motor. Furthermore, due to the operational relationship between the cam and the actuating rod in the present invention, when the second part abuts the actuating rod, the fluid passage between the first chamber and the second chamber is appropriate, which is favorable for fluid circulation in the chamber. , it is more convenient to adjust the length of the seat tube assembly.

In order to describe the present invention more clearly, preferred embodiments are given and described in detail with the drawings as follows. Referring to FIGS. 2 and 3 , a bicycle adjustable seat post 100 according to a preferred embodiment of the present invention includes a tube assembly 10 , a telescopic cylinder 20 and a control assembly 30 .

The seat tube assembly 10 includes an outer tube 12 and an inner tube 14 whose outer diameter is smaller than the inner diameter of the outer tube 12 , and the inner tube 14 is threaded through the outer tube 14 in a manner that can move along the axial direction of the outer tube 12 . tube 12. The outer tube 12 is used for connecting to the frame of a bicycle (not shown), the upper end of the inner tube 14 is located outside the outer tube 12 and is provided with a connecting seat 16, and the connecting seat 16 is used for connecting The saddle of the bicycle (not shown).

The connecting seat 16 has a motor chamber 161 and a battery chamber 162, and the motor chamber 161 communicates with the inner space of the inner tube 14 and the battery chamber 162. The position of the motor chamber 161 is between the bicycle Between the seat cushion and the inner tube 14, and partially overlap in the projection area of the inner tube 14 extending toward the seat cushion of the bicycle. The motor chamber 161 is communicated with the outside through a receiving port 16a and an accommodating port 16b, and the accommodating port 16b is located at the connection between the motor chamber 161 and the battery chamber 162 . The connecting base 16 further includes a first cover 163 and a second cover 164. The first cover 163 is used to close the receiving port 16a, and the second cover 164 is used to close the receiving port 16b. The aforementioned connecting seat 16 and the inner tube 14 are integrally formed, and both the outer tube 12 and the connecting seat 16 are made of metal materials to maintain the rigidity of the seat tube assembly, and the first cover 163 and the second The cover body 164 is made of non-metallic materials, such as common non-metallic materials such as plastic, silicone or glass fiber composite materials.

It is added that, in this embodiment, the structure for realizing the combination of the seat tube assembly 10 and the seat cushion of the bicycle includes two through holes 16 c formed in the connecting seat 16 , an adjusting seat 165 and two fixing members 166 . The two through holes 16c communicate with the motor chamber 161, and one of them corresponds to the receiving port 16a and the other corresponds to the receiving port 16b. 165, and fixed on the saddle of the bicycle. With the aforementioned structural design, the angle of the seat cushion of the bicycle can be adjusted according to individual needs, thereby improving the flexibility of use. In addition, the number of the aforementioned through holes and fixing parts is not limited to this.

The telescopic cylinder 20 has a cylinder barrel 22 and a piston rod 24 . The cylinder 22 is fixed in the outer tube 12 and is filled with a fluid (not shown in the figure), and the fluid can be gas or liquid. The piston rod 24 has a rod body 242 and a piston head 244 connected to the rod body 242 , wherein the rod body 242 is fixed on the inner tube 14 , and one end of the rod body 242 extends into the cylinder 22 and is connected to the piston head 244 , and the piston head 244 divides the cylinder 22 into a first chamber A1 and a second chamber A2. Whether the first chamber A1 and the second chamber A2 communicate with each other will affect the piston rod 24 Whether it can move relative to the cylinder 22 affects whether the inner tube 14 can move relative to the outer tube 12 .

The control assembly 30 is used to control the communication or blocking of the first chamber A1 and the second chamber A2. Referring to FIG. 4 to FIG. 8, the control assembly 30 includes a motor housing 31, a motor 32, a The actuating lever 33 , a cam 34 , a battery 35 and a control circuit board 36 . The motor housing 31 is disposed in the motor chamber 161 from the accommodating opening 16b, and has a first opening 31a and a second opening 31b opposite to each other, and the motor 32 is inserted through the first opening 31a Inside the motor housing 31, the output shaft 321 of the motor 32 penetrates through the second opening 31b.

The actuating rod 33 of the control assembly 30 is located in the piston rod 24 and its upper end extends into the motor chamber 161 . The cam 34 is disposed on the output shaft 321 and has a cam body 342 and a position indicating portion 344 that are fixedly connected to each other, wherein the cam body 342 has a driving portion 343 in the circumferential direction. The driving part 343 abuts the actuating rod 33 and drives the actuating rod 33 to reciprocate along its axial direction. The driving part 343 has a first part 343a and a second part 343b. As shown in FIGS. 7 and 9 , the shortest distance from the first part 343a to the axis of the output shaft 321 is smaller than that from the second part 343b to the output The shortest distance from the axis of the shaft 321. When the first portion 343a of the driving portion 343 abuts the actuating rod 33, the actuating rod 33 is in a first position P1; when the second portion 343b of the driving portion 343 abuts the actuating rod 33, the actuating rod 33 at a second position P2.

The battery 35 is disposed in the battery chamber 162 from the accommodating opening 16b, and is electrically connected to the control circuit board 36 (not shown) for supplying voltage.

The control circuit board 36 is disposed on the outer surface of the motor housing 31 and is electrically connected to the motor 32 . The control circuit board 36 is used to control the rotation of the output shaft 321 of the motor 32 , and includes a wireless unit 362 and a light interruption sensor 364 . The wireless unit 362 is used for signal connection to the signal transmitter 41 of a push switch 40 disposed on the handlebar of the bicycle, and the signal transmitter 41 controls the motor 32 to operate by means of wireless transmission. The wireless unit has an antenna 362a, and the wireless unit 362 has a side surface 362b of the antenna 362a facing the receiving port 16a, and the included angle between an axis X1 perpendicular to the side surface 362b and the opening direction of the receiving port 16a is between Between 0 degrees and 15 degrees, in this embodiment, the included angle between the axial direction of the antenna 362a and the opening direction of the receiving port 16a is 0 degrees, so that the receiving effect of the antenna 362a is better. In addition, the wireless unit can also be integrated with the control circuit board 36 to dispose the antenna 362c on the side 361 of the control circuit board 36 away from the motor 32, as shown in FIG. 4, although the receiving effect of this embodiment is not as good An embodiment is preferable, but can achieve the advantages of reducing the overall weight and space.

The light blocking sensor 364 of the control circuit board 36 is disposed on the side of the control circuit board 36 combined with the motor housing 31 and has a sensing position 364a (refer to FIG. 7 ), which indicates the position of the cam 34 The portion 344 can be driven by the output shaft 321 to selectively approach or move away from the sensing position 364a, thereby detecting the rotational state of the cam 34 and deducing which portion of the driving portion 343 abuts the actuating rod 33 .

7 to 10, when the rider presses the push switch 40 on the handlebar of the bicycle, the signal transmitter 41 of the push switch 40 will transmit a signal to the wireless unit 362, and then the control circuit board 36 will read the signal, and control the output shaft 321 of the motor 32 to rotate toward a predetermined direction R, and the position indicating portion 344 of the cam 34 will enter the sensing position 364a toward the predetermined direction R. At the same time, the driving portion 343 of the cam 34 pushes the actuating rod 33 to move from the first position P1 to the direction of the second position P2 until the position indicating portion 344 moves away from the sensing position 364a toward the predetermined turning direction R, The cam 34 stops rotating. When the position indicating portion 344 leaves the sensing position 364a toward the predetermined direction R, the second portion 343b of the driving portion 343 abuts the actuating rod 33, and the actuating rod 33 is located at the second position P2, so that the first The chamber A1 communicates with the second chamber A2. At this time, the piston rod 24 can move up and down in the cylinder 22, so that the volumes of the first chamber A1 and the second chamber A2 are changed, so that the inner tube 14 is relative to the outer The tube 12 moves along its axial direction to achieve the purpose of adjusting the height of the seat cushion.

When the proper bicycle saddle height is adjusted, the rider releases the push switch 40 and the cam 34 enters the sensing position 364a in the opposite direction of the predetermined turn R. At the same time, the driving portion 343 of the cam 34 pushes the actuating rod 33 to move from the second position P2 to the first position P1 until the position indicating portion 344 leaves the sensing position 364a in the opposite direction of the predetermined turning direction R , the cam 34 stops rotating. When the position indicating portion 344 moves away from the sensing position 364a in the opposite direction of the predetermined turning R, the first portion 343a of the driving portion 343 abuts the actuating rod 33, and the actuating rod 33 is located at the first position P1, so that The first chamber A1 is not communicated with the second chamber A2, so as to fix the height of the seat cushion. In other practical applications, the application mechanism of the photo-interrupting sensor can be designed and changed according to requirements, and it is not limited to using the photo-interrupting sensor as the component for sensing the movement track of the cam, but can be an electromagnetic sensor.

To further illustrate, the included angle between the axis of the actuating rod 33 and the axis of the output shaft 321 is between 80 degrees and 100 degrees; preferably, the axis of the actuating rod 33 and the axis of the output shaft 321 The included angle of the axis is between 84 degrees and 96 degrees; in this embodiment, the included angle between the axis of the actuating rod 33 and the axis of the output shaft 321 is 90 degrees, so that the motor 32 can be maintained at better efficiency. In addition, considering the space design of the motor chamber 161, the shortest distance between the shaft center of the actuating rod 33 and the shaft center of the output shaft 321 is between 0 mm and 15 mm, so that it can be adjusted according to different design changes. Making some minor adjustments will not affect the working efficiency of the motor 32 and the movement of the actuating rod 33, and will not occupy too much volume.

11 and 12 , the present invention further provides a bicycle adjustable seat post 500 according to a preferred embodiment, and the wireless unit (not shown) of the bicycle adjustable seat post 500 is also integrated into the control circuit board 501 , and an antenna 502 electrically connected to the wireless unit is disposed on the inner side 503a of the first cover 503 and located in the motor chamber 504, and the antenna 502 is electrically connected to the control circuit board 501 by a wire 505 , as a result, the antenna 502 has a better receiving effect. In addition, the bicycle adjustable seat tube 500 includes a charging portion 506 , and the charging portion 506 is disposed on the inner side surface 507 a of the second cover body 507 . The charging unit 506 is internally provided with a receiving coil (not shown), and the charging unit 506 can sense an external magnetic field through the receiving coil, convert the induced magnetic field into an induced voltage and transmit it to the battery 508 .

FIG. 12 shows that a wireless power supply device 600 is attached to the outer side of the second cover 507 , and the wireless power supply device 600 includes a transmission induction coil (not shown). The transmission induction coil of the wireless power supply device 600 generates a specific magnetic field, so that the receiving coil of the charging part 506 is magnetized under the influence of the magnetic field, and then the magnetic energy is converted into electric energy and transmitted to the battery 508 to achieve the purpose of charging. The wireless power supply device 600 has a magnet or a magnetic element made of a magnetic material, the charging portion 506 is provided with a magnet or a magnetic element made of a magnetic material, The magnetically attractable material includes, but is not limited to, nickel and cobalt. The wireless power supply device 600 can be firmly attached to the charging part 506 by the magnet or the magnetic attraction element of the wireless power supply device 600 being magnetically attracted with the magnet or the magnetic attraction element of the charging part 506 . However, in other practical applications, the charging portion can be electrically connected to a power supply device in the form of male-female docking, for example, the plug of the power supply device is inserted into the socket of the charging portion and electrically connected with metal contacts.

To sum up, the bicycle adjustable seat tube of the present invention drives the cam to rotate through the motor to drive the actuating rod to move along its axial direction, thereby blocking or connecting the first chamber and the second chamber in the cylinder, so as to achieve adjustment or adjustment. The purpose of fixing the length of the seat tube assembly. In addition, the design of the angle between the axis of the output shaft of the motor and the axis of the actuating rod and the design of the distance between the axis of the actuating rod and the axis of the output shaft in the present invention help to save the output power of the motor , and avoid excessive bulk at the connection seat. Furthermore, due to the structural design between the cam and the actuating rod in the present invention, when the second part of the driving part abuts the actuating rod, the fluid passage between the first chamber and the second chamber is appropriate, which is beneficial. The fluids between the first chamber and the second chamber communicate with each other, so that the adjustment of the length of the seat tube assembly is smoother.

The above descriptions are only preferred feasible embodiments of the present invention, and any equivalent changes made by applying the description of the present invention and the scope of the patent application should be included in the patent scope of the present invention.

[present invention] 1 : bicycle adjustable seat tube 2: control rod 3: seat tube 4: valve stem 5: cam block 6: valve seat 7: motor 8: drive shaft 9: seat post 100: bicycle adjustable seat tube 10 : seat tube assembly 12: outer tube 14: inner tube 16: connecting seat 16a: receiving port 16b: receiving port 16c: through hole 161: motor chamber 162: battery chamber 163: first cover 164: second Cover body 165: Adjustment seat 166: Fixing piece 20: Telescopic cylinder 22: Cylinder barrel 24: Piston rod 242: Rod body 244: Piston head 30: Control assembly 31: Motor housing 31a: First opening 31b: Second opening 32 : Motor 321: Output shaft 33: Actuator lever 34: Cam 342: Cam body 343: Drive part 343a: First part 343b: Second part 344: Position indicator 35: Battery 36: Control circuit board 361: Side surface 362: Wireless Unit 362a: Antenna 362b: Side 362c: Antenna 364: Light Interruption Sensor 364a: Sensing Position 40: Push Switch 41: Signal Transmitter 500: Bicycle Adjustable Seat Post 501: Control Circuit Board 502: Antenna 503: Section A cover 503a: inner side 504: motor chamber 505: electric wire 506: charging part 507: second cover 507a: inner side 508: battery 600: wireless power supply device R: scheduled steering A1: first chamber A2: first Two-chamber P1: first position P2: second position X1: axis

FIG. 1 is a schematic diagram of the operation of a conventional bicycle drop seat post. FIG. 2 is a schematic diagram of the application of the adjustable seat post of a bicycle according to a preferred embodiment of the present invention. FIG. 3 is a partial cross-sectional schematic view of the bicycle adjustable seat tube according to the above preferred embodiment. FIG. 4 is a partial exploded view of the control assembly in the bicycle adjustable seatpost of the above preferred embodiment. FIG. 5 is a partially exploded view of FIG. 4 from another perspective. FIG. 6 is a top view of the adjustable seat post of the bicycle according to the above preferred embodiment. FIG. 7 is a partial cross-sectional view taken along the line 7-7 of FIG. 6 . FIG. 8 is a cross-sectional view taken along the line 8-8 of FIG. 6 . FIG. 9 is a partial cross-sectional view similar to FIG. 7 , showing that the second part of the driving part of the cam abuts the actuating rod. FIG. 10 is a cross-sectional view similar to FIG. 8 , showing the downward movement of the inner tube relative to the outer tube to shorten the length of the overall seat tube assembly. 11 is a partial exploded view of another preferred embodiment of the bicycle adjustable seatpost of the present invention. FIG. 12 is a partial cross-sectional schematic view of the bicycle adjustable seat tube according to the above preferred embodiment.

100: Bike Adjustable Seatpost

10: Seatpost assembly

12: Outer tube

14: Inner tube

16: Connector

165: Adjustment seat

166: Fixtures

20: Telescopic cylinder

22: Cylinder barrel

24: Piston rod

40: Press the switch

41: Signal transmitter

A1: first chamber

A2: Second chamber

Claims (12)

A bicycle adjustable seat tube comprising: A pipe assembly, comprising an outer pipe and an inner pipe with an outer diameter smaller than the inner diameter of the outer pipe, and the inner pipe system is at least partially arranged in the outer pipe and can move along the axial direction of the outer pipe, wherein the outer pipe is the pipe system is arranged in the frame of a bicycle; a connecting seat, disposed at one end of the inner tube and used for connecting the seat cushion of the bicycle, and having a motor chamber and a battery chamber, and the motor chamber communicates with the inner space of the inner tube; A telescopic cylinder has a cylinder and a piston rod, wherein the cylinder is connected to the outer tube and has a fluid inside; the piston rod has a rod body and a piston head connected to the rod body, and the rod body is connected One end of the inner tube extends into the cylinder and is connected to the piston head; and the piston head divides the cylinder into a first chamber and a second chamber; and A control assembly includes a motor, an actuating lever, a cam, a control circuit board and a battery; the motor is arranged in the motor chamber and has an output shaft; the actuating lever is arranged in the seat tube assembly and has an output shaft. One end extends into the motor chamber, and the included angle between its axis and the axis of the output shaft is between 80 degrees and 100 degrees; the cam is arranged on the output shaft, and has a driving part in the circumferential direction; the drive The part abuts the actuating rod, and drives the actuating rod to reciprocate along its axial direction between a first position and a second position; the driving part has a first position and a second position, and the first position The shortest distance to the output shaft is smaller than the shortest distance from the second part to the output shaft; when the first part of the driving part abuts the actuating rod, the actuating rod is in the first position, so that the first chamber The second chamber is not communicated; when the second part of the driving part is in contact with the actuating lever, the actuating lever is in the second position, so that the first chamber communicates with the second chamber; the control circuit board is electrically The motor is connected to control the rotation of the output shaft; the battery is arranged in the battery chamber and is electrically connected to the control circuit board. The bicycle adjustable seat tube as claimed in claim 1, wherein the connecting seat is integrally formed. The bicycle adjustable seat tube as claimed in claim 1, wherein the included angle between the axis of the actuating rod and the axis of the output shaft is between 84 degrees and 96 degrees. The bicycle adjustable seat tube as claimed in claim 1, wherein the shortest distance between the axis of the actuating rod and the axis of the output shaft is between 0 mm and 15 mm. The bicycle adjustable seatpost as claimed in claim 1, wherein the motor chamber has a receiving port, the connecting base includes a first cover, the control circuit board includes a wireless unit; the wireless unit has an antenna, It has a side surface of the antenna facing the receiving port; the included angle between an axis perpendicular to the side surface and the opening direction of the receiving port is between 0 degrees and 15 degrees; the first cover closes the receiving port . The bicycle adjustable seat post as claimed in claim 5, wherein the motor chamber communicates with the battery chamber, and has an accommodating opening at the communication between the motor chamber and the battery chamber, and the motor chamber is located in the battery chamber. The seat cushion of the bicycle and the inner tube are partially overlapped in the projection area of the inner tube extending toward the seat cushion; the connecting seat includes a second cover, and the second cover closes the accommodating opening . The bicycle adjustable seatpost as claimed in claim 6, wherein the connecting seat is made of a metal material, and the first cover and the second cover are made of a non-metallic material. The bicycle adjustable seatpost as claimed in claim 1, wherein the control circuit board has a sensor, and the sensor has a sensing position; a part of the cam can be selectively driven by the output shaft Approaching or moving away from the sensing position, and thereby detecting the rotation state of the cam. The bicycle adjustable seat tube as claimed in claim 6, wherein the connecting seat has at least a through hole, wherein the at least through hole communicates with the motor chamber and corresponds to one of the receiving port and the accommodating port; the connection The seat includes an adjusting seat and at least one fixing piece, wherein the at least one fixing piece is arranged in the at least through hole, the adjusting seat and the seat cushion of the bicycle. The bicycle adjustable seatpost as claimed in claim 1, wherein the motor chamber has a receiving port, the connecting base includes a first cover, the control circuit board includes a wireless unit; the wireless unit has an antenna, and the antenna is arranged on a side of the control circuit board away from the motor; the first cover closes the receiving port. The bicycle adjustable seatpost as claimed in claim 1, wherein the motor chamber has a receiving port; the connecting seat comprises a first cover, and the first cover closes the receiving port; the control circuit board It includes a wireless unit and is used for electrical connection with an antenna; the antenna is arranged on the inner side of the first cover and located in the motor chamber. The bicycle adjustable seat post according to claim 6, wherein the second cover body is provided with a charging part, and the charging part is used for charging the battery.

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