Electronic rear derailleur and bicycle

Abstract

The application discloses an electronic rear derailleur and a bicycle, comprising: a base member; a movable member movably connected to the base member through a connecting rod assembly, the movable member comprising a housing and a main shaft, the main shaft being rotationally connected to the housing about its own axis, the main shaft having a wire cavity extending along the axis of the main shaft inside; a drive motor configured to drive the movable member to move relative to the base member; a chain guide member mounted to one end of the main shaft in a first direction, the chain guide member having a receiving cavity inside; a battery mounted to the receiving cavity; a first wire segment entering the wire cavity through the receiving cavity and being electrically connected to a second wire segment through a rotating electrical connection structure, the second wire segment passing through the housing and being electrically connected to the drive motor. The application ingeniously wires in the complex motion relationship environment of the electronic rear derailleur, completely hides and protects the first wire, has a shorter wire path and fewer turns, and avoids winding or twisting.

Description

Technical Field

[0001] This invention relates to the field of bicycle technology, and particularly to an electronic rear derailleur and bicycle. Background Technology

[0002] In an electronic rear derailleur, the drive motor, acting as the electronic shifting actuator, is responsible for driving the moving components to move relative to the base components. This allows the chain guide assembly to guide the chain accurately between different freewheels, thus achieving gear shifting. The chain guide assembly mainly includes a chain guide component and guide wheels and tension wheels rotatably connected to it. The guide wheels guide the chain accurately between different freewheels, while the tension wheels maintain the chain at a suitable tension through elastic tension.

[0003] The battery powers the drive motor. Currently, the battery is mainly installed directly on the frame and electrically connected to the drive motor via wires. The wires need to cross multiple joints on the bicycle and run for a long distance. During riding, the wires are easily damaged or detached due to vibration, pulling, snagging or external impact. Moreover, the wiring is difficult, the wiring path is long and complicated, disassembly and maintenance are difficult, and it is easy to cause mechanical interference with other structures on the bicycle. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an electronic rear derailleur that can prevent damage or detachment of the wires, reduce wiring difficulty, and facilitate cable routing.

[0005] The present invention also proposes a bicycle having the above-mentioned electronic rear derailleur.

[0006] An electronic rear derailleur according to a first aspect of the present invention has a first direction and includes: a base member configured to be mounted on a vehicle frame; a movable member movably connected to the base member via a linkage assembly, the movable member including a housing and a spindle located within the housing, the spindle being rotatably connected to the housing about its own axis, the spindle having a cable routing cavity extending along the axis of the spindle, the axis of the spindle extending along the first direction; a drive motor mounted on the base member or the linkage assembly and configured to drive the movable member to move relative to the base member; and a chain guide member mounted on one end of the spindle in the first direction, the chain guide member... The component has an internal storage cavity; a battery is installed in the storage cavity and electrically connected to the drive motor via a first wire to provide stored electrical energy to the drive motor; wherein, the first wire includes a first segment and a second segment, the first segment is electrically connected to the battery, the first segment enters the wiring cavity through the storage cavity, and is electrically connected to the second segment through a rotating electrical connection structure, the rotating electrical connection structure is disposed between the other end of the main shaft in the first direction and the housing, and is configured to maintain electrical conductivity when the first segment and the second segment rotate relative to each other, the second segment passes through the housing and is electrically connected to the drive motor.

[0007] It has at least the following beneficial effects: This electronic rear derailleur adopts a built-in battery power supply design. The main shaft usually serves as the pivot center of the damper on the moving component. It has a pre-set cable routing cavity inside, and the chain guide component has a storage cavity inside. The battery is installed in the storage cavity. The first wire is cleverly routed in the complex motion environment of the electronic rear derailleur. The first wire segment enters the cable routing cavity through the storage cavity and is electrically connected to the second wire segment through a rotating electrical connection structure. The second wire segment passes through the housing and is electrically connected to the drive motor. When the main shaft rotates relative to the housing around its own axis, the first wire segment and the second wire segment rotate relative to each other. The rotating electrical connection structure can still maintain electrical conduction, thereby avoiding the first wire from being exposed on the bicycle. It completely hides and protects the first wire, preventing damage or detachment of the first wire due to vibration, pulling, hooking, or external impact. Moreover, the straight-line distance between the battery and the drive motor is small, the cable routing path is short and has fewer turns, and there will be no mechanical interference with other components. In particular, passing through the main shaft with complex relative motion, it cleverly avoids the first wire itself from getting tangled or twisted, and also facilitates disassembly and maintenance.

[0008] According to some embodiments of the present invention, the rotary electrical connection structure includes: a first conductive plate disposed at the other end of the main shaft in the first direction and electrically connected to the first line segment; a contact disposed within the housing and electrically connected to the second line segment, the contact slidingly abutting against the first conductive plate and configured to maintain electrical conductivity when the first conductive plate rotates relative to the contact.

[0009] According to some embodiments of the present invention, the rotary electrical connection structure further includes: a second conductive plate, fixedly installed inside the housing, the second line segment being electrically connected to the contact through the second conductive plate; the contact is configured as an elastic slider, one end of the elastic slider being fixedly connected to the second conductive plate, and the other end slidingly abutting against the first conductive plate.

[0010] According to some embodiments of the present invention, the spindle has a first wire-passing hole at one end in the first direction perpendicular to the first direction, the first wire-passing hole connects the wiring cavity and the receiving cavity, and the first wire segment passes through the first wire-passing hole.

[0011] According to some embodiments of the present invention, the length of the guide chain member extends along a second direction and the width extends along a third direction. The third direction, the second direction, and the first direction are perpendicular to each other. The guide chain member has a side wall plate at one end in the third direction. A battery compartment and a wiring channel are provided in the storage cavity. The wiring channel is located between the battery compartment and the side wall plate in the third direction. The battery is installed in the battery compartment. After the first line segment is electrically connected to the battery, it enters the wiring cavity through the wiring channel.

[0012] According to some embodiments of the present invention, the housing is provided with a second wire-passing hole along a direction perpendicular to the first direction, and the second wire segment passes through the second wire-passing hole.

[0013] According to some embodiments of the present invention, the drive motor is mounted on the base member, and the linkage assembly includes: an inner swing block, one end of which is hinged to the base member and the other end of which is hinged to the movable member; and an outer swing block, one end of which is hinged to the base member and the other end of which is hinged to the movable member; wherein the base member, the inner swing block, the movable member, and the outer swing block constitute a parallel four-bar linkage mechanism, and the second line segment passes sequentially through the second wire hole and between the inner swing block and the outer swing block, and is electrically connected to the drive motor.

[0014] According to some embodiments of the present invention, the length of the guide chain member extends along a second direction, which is perpendicular to the first direction. A tensioning wheel is rotatably connected to one end of the guide chain member away from the main shaft in the second direction. The axis of the tensioning wheel extends along the first direction. A generator is mounted on the tensioning wheel. The generator is used to convert the mechanical energy generated by the rotation of the tensioning wheel into electrical energy and is electrically connected to the battery. The battery is capable of storing the electrical energy generated by the generator.

[0015] According to some embodiments of the present invention, the generator is an AC generator, a circuit board is installed in the receiving cavity, the circuit board is located between the generator and the battery in the second direction, a rectifier circuit is provided on the circuit board, the rectifier circuit is electrically connected to the generator and the battery respectively through a second wire and a third wire, and is configured to convert the AC power generated by the generator into DC power to charge the battery, and the second wire and the third wire are received in the receiving cavity.

[0016] According to some embodiments of the present invention, the receiving cavity is equipped with a circuit board, the rectifier circuit is disposed on the circuit board, and the circuit board is located between the generator and the battery in the second direction.

[0017] A bicycle according to a second aspect of the present invention includes a frame and an electronic rear derailleur according to the first aspect of the present invention described above.

[0018] It has at least the following beneficial effects: This bicycle has all the beneficial effects brought about by the above-mentioned electronic rear derailleur, which will not be repeated here.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the electronic rear derailleur in an embodiment of the present invention; Figure 2 This is a schematic diagram of the electronic rear derailleur in an embodiment of the present invention from a third-party perspective; Figure 3 This is a cross-sectional view of the active component in an embodiment of the present invention; Figure 4 This is an exploded view of the conductor chain component, battery, and circuit board in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the guide chain component in an embodiment of the present invention.

[0021] Reference numerals: 1. Base component; 2. Linkage assembly; 21. Inner swing block; 22. Outer swing block; 3. Movable component; 31. Housing; 311. Second wire hole; 32. Main shaft; 321. Wiring cavity; 322. First wire hole; 4. Drive motor; 5. Guide chain component; 51. Storage cavity; 511. Battery compartment; 512. Wiring channel; 52. Side wall plate; 6. Battery; 7. First wire; 71. First line segment; 72. Second line segment; 8. Rotary electrical connection structure; 81. First conductive plate; 82. Contact; 83. Second conductive plate; 9. Tensioning wheel; 10. Generator; 11. Second wire; 12. Third wire; 13. Circuit board; 14. Guide wheel. Detailed Implementation

[0022] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0023] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0024] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0025] Reference Figures 1 to 5 The present invention discloses an electronic rear derailleur, comprising a base component 1, a connecting rod assembly 2, a movable component 3, a drive motor 4, a chain guide component 5, a battery 6, and a first wire 7.

[0026] Reference Figure 1 The base component 1 is configured to be mounted on the frame and forms a fixed base for the electronic rear derailleur. The movable component 3 is movably connected to the base component 1 via the linkage assembly 2. The drive motor 4 is mounted on the base component 1 or the linkage assembly 2 and is configured to drive the movable component 3 to move relative to the base component 1 to perform gear shifting operations.

[0027] Reference Figure 2 and Figure 3The movable component 3 includes a housing 31 and a main shaft 32 located inside the housing 31. The housing 31 is connected to the connecting rod assembly 2. The main shaft 32 is rotatably connected to the housing 31 about its own axis. The main shaft 32 has a wiring cavity 321 extending along the axis of the main shaft 32. The axis of the main shaft 32 extends along a first direction.

[0028] For ease of description, we define a first direction, a second direction, and a third direction that are perpendicular to each other. The first direction corresponds to the left and right direction of the frame, which is also the axial direction of the main shaft 32. The second direction and the third direction are not fixed directions and will change as the main shaft 32 rotates. The second direction is the length direction of the chain guide 5, and the third direction is the width direction of the chain guide 5.

[0029] Reference Figure 4 and Figure 5 The guide chain component 5 is installed at one end of the main shaft 32 in the first direction. The guide chain component 5 has a storage cavity 51 inside. The battery 6 is installed in the storage cavity 51 and is electrically connected to the drive motor 4 through the first wire 7 to provide the stored electrical energy to the drive motor 4.

[0030] It should be noted that the guide chain component 5 is also equipped with a guide wheel 14 and a tension wheel 9. The drive motor 4 drives the movable component 3 to move relative to the base component 1 in order to drive the guide wheel 14 on the guide chain component 5 to move, thereby guiding the chain to move accurately between different flywheels. The main shaft 32 usually serves as the pivot center of the damper provided on the movable component 3. A tensioning elastic element is also installed between the main shaft 32 and the housing 31. The guide chain component 5 rotates synchronously with the main shaft 32. The tensioning elastic element acts on the main shaft 32 to make the tension wheel 9 on the guide chain component 5 elastically tension the chain, thereby keeping the chain in a suitable tension state.

[0031] The first conductor 7 includes a first segment 71 and a second segment 72, as shown in the reference. Figure 5 The first wire segment 71 is electrically connected to the battery 6. The first wire segment 71 enters the wiring cavity 321 through the storage cavity 51 and is electrically connected to the second wire segment 72 through the rotating electrical connection structure 8. (Refer to...) Figure 3 A rotating electrical connection structure 8 is disposed between the other end of the main shaft 32 in the first direction and the housing 31, and is configured to maintain electrical conductivity when the first segment 71 and the second segment 72 rotate relative to each other, as shown in the figure. Figure 2 The second segment 72 passes through the housing 31 and is electrically connected to the drive motor 4.

[0032] With the aforementioned built-in battery power supply design, the main spindle 32 typically serves as the pivot center of the damper on the moving component 3. An internal wiring cavity 321 is pre-set, and the chain guide component 5 has a storage cavity 51 in which the battery 6 is installed. The first wire 7 is cleverly routed in the complex motion environment of the electronic rear derailleur. The first wire segment 71 enters the wiring cavity 321 via the storage cavity 51 and is electrically connected to the second wire segment 72 via the rotating electrical connection structure 8. The second wire segment 72 passes through the housing 31 and is electrically connected to the drive motor 4. This ensures that the main spindle 32 rotates relative to the housing 31 around its own axis. The first line segment 71 and the second line segment 72 rotate relative to each other, and the rotating electrical connection structure 8 can still maintain electrical conduction, thereby preventing the first wire 7 from being exposed on the bicycle. The first wire 7 is completely hidden and protected, avoiding damage or detachment of the first wire 7 due to vibration, pulling, hooking or external impact. Moreover, the straight-line distance between the battery 6 and the drive motor 4 is small, the wiring path is short and has fewer turns, and there will be no mechanical interference with other components. In particular, it passes through the inside of the main shaft 32 with complex relative motion, cleverly avoiding the first wire 7 from getting tangled or twisted, and also facilitating disassembly and maintenance.

[0033] In some embodiments of the present invention, reference is made to... Figure 2 and Figure 3 The rotating electrical connection structure 8 includes a first conductive plate 81 and a contact 82. The first conductive plate 81 is disposed at the other end of the main shaft 32 in a first direction and is electrically connected to the first line segment 71. The contact 82 is disposed inside the housing 31 and is electrically connected to the second line segment 72. The contact 82 slides against the first conductive plate 81 and is configured to maintain electrical conduction when the first conductive plate 81 rotates relative to the contact 82, so that when the main shaft 32 rotates about its own axis relative to the housing 31, the first line segment 71 and the second line segment 72 can maintain electrical conduction.

[0034] Furthermore, in some embodiments, the rotating electrical connection structure 8 further includes a second conductive plate 83, which is fixedly installed inside the housing 31. The second line segment 72 is electrically connected to the contact 82 through the second conductive plate 83. The contact 82 can be specifically configured as an elastic slider, with one end of the elastic slider fixedly connected to the second conductive plate 83 and the other end sliding against the first conductive plate 81.

[0035] To improve the reliability of the electrical connection, two concentric ring-shaped conductive tracks that are insulated from each other can be formed on the first conductive plate 81, corresponding to the positive and negative poles respectively, and two contacts 82 are configured to realize the rotational electrical connection of the two lines.

[0036] To facilitate wiring from the receiving cavity 51 to the wiring cavity 321, in some embodiments, reference is made to... Figures 3 to 5The spindle 32 has a first wire hole 322 at one end in the first direction perpendicular to the first direction. The first wire hole 322 connects the wire routing cavity 321 and the storage cavity 51. The first wire segment 71 passes through the first wire hole 322 so that the first wire segment 71 can pass into the interior of the spindle 32.

[0037] Reference Figure 5 In some embodiments of the present invention, the length of the guide chain member 5 extends along a second direction, and the width extends along a third direction. The guide chain member 5 has a side wall plate 52 at one end in the third direction. A battery compartment 511 and a wiring channel 512 are disposed within the receiving cavity 51. The wiring channel 512 is located between the battery compartment 511 and the side wall plate 52 in the third direction. The battery 6 is installed in the battery compartment 511. After being electrically connected to the battery 6, the first wire segment 71 enters the wiring cavity 321 via the wiring channel 512. This compact internal arrangement of the guide chain member 5 enables the installation of the battery 6 and the storage of the first wire 7, preventing the first wire 7 from crossing the surface of the battery 6 and facilitating the replacement of the battery 6.

[0038] Reference Figure 2 and Figure 3 In some embodiments, the housing 31 has a second wire hole 311 perpendicular to the first direction, and the second wire segment 72 passes through the second wire hole 311 so that the second wire segment 72 passes through the housing 31.

[0039] In some embodiments, refer to Figure 1 and Figure 2 The drive motor 4 is specifically mounted on the base component 1. The linkage assembly 2 includes an inner swing block 21 and an outer swing block 22. One end of the inner swing block 21 is hinged to the base component 1, and the other end is hinged to the movable component 3. One end of the outer swing block 22 is hinged to the base component 1, and the other end is hinged to the movable component 3. The base component 1, the inner swing block 21, the movable component 3, and the outer swing block 22 together form a parallel four-bar linkage to ensure the translation of the movable component 3. The second wire hole 311 connects the interior of the housing 31 and the interior of the linkage assembly 2. The second wire segment 72 passes sequentially through the second wire hole 311 and between the inner swing block 21 and the outer swing block 22. That is, the second wire segment 72 first exits from the housing 31 through the second wire hole 311, continues to pass through the gap between the inner swing block 21 and the outer swing block 22, and finally connects to the drive motor 4. Utilizing the motion characteristics of the parallel four-bar linkage, the second wire segment 72 only undergoes slight deflection during the swinging process and will not bend or be strained.

[0040] To address the issues of existing electronic rear derailleurs where the generator, battery, and drive motor are far apart, resulting in complex wiring and inconvenient charging, this invention integrates a power generation function into the chain guide component. Figure 4 and Figure 5The length of the guide chain component 5 extends along the second direction. The guide chain component 5 is rotatably connected to a guide wheel 14 at one end of the guide chain component 5 near the main shaft 32 in the second direction, and is rotatably connected to a tension wheel 9 at the other end of the guide chain component 5 away from the main shaft 32 in the second direction. The axis of the tension wheel 9 extends along the first direction. A generator 10 is installed on the tension wheel 9. The tension wheel 9 will rotate synchronously around its own axis driven by the chain. The generator 10 is used to convert the mechanical energy generated by the rotation of the tension wheel 9 into electrical energy and is electrically connected to the battery 6. The battery 6 can store the electrical energy generated by the generator 10 and realize the function of self-generating electricity.

[0041] In some embodiments, the generator 10 is an AC generator, and a circuit board 13 is installed inside the housing cavity 51. The circuit board 13 is located between the generator 10 and the battery 6 in the second direction. A rectifier circuit is provided on the circuit board 13. The rectifier circuit is electrically connected to the generator 10 through a second wire 11 and to the battery 6 through a third wire 12. The rectifier circuit is configured to convert the AC power generated by the generator 10 into DC power to charge the battery 6. The second wire 11 and the third wire 12 are housed in the housing cavity 51 and can be routed along the side wall of the housing cavity 51 or the wiring channel 512, so that the charging circuit also achieves fully concealed wiring. Since the generator 10 and the battery 6 are both integrated on the chain member 5, the wiring distance between them is extremely short, which significantly simplifies the wiring structure, avoids the exposure of the second wire 11 and the third wire 12 and complex motion interference, and improves the reliability and integrity of the power generation and charging system.

[0042] To reiterate, by placing the battery 6 within the storage cavity 51 of the chain guide component 5 and utilizing the wiring cavity 321 within the main shaft 32, the rotating electrical connection structure 8, and the internal channels of the housing 31 and the connecting rod assembly 2, this invention not only completely conceals the first wire 7, the second wire 11, and the third wire 12, but also takes into account the need for short-distance, minimal-bend wiring between the battery 6 and the drive motor 4 and the generator 10. This effectively avoids motion interference and wire damage, improves the durability, compactness, and neatness of the electronic rear derailleur, and is easy to assemble and maintain.

[0043] The present invention also discloses a bicycle, including a frame and an electronic rear derailleur as described in the above embodiments. This bicycle possesses all the beneficial effects of the electronic rear derailleur described in the above embodiments, which will not be repeated here.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An electronic rear derailleur, having a first direction, characterized in that, include: Base components, configured for mounting on the vehicle frame; A movable component is movably connected to the base component via a linkage assembly. The movable component includes a housing and a main shaft located within the housing. The main shaft is rotatably connected to the housing about its own axis. The main shaft has a wiring cavity extending along the axis of the main shaft, and the axis of the main shaft extends along the first direction. A drive motor is mounted on the base member or the linkage assembly and configured to drive the movable member to move relative to the base member; A chain guide component is installed at one end of the main shaft in the first direction, and the chain guide component has a receiving cavity inside. A battery is installed in the storage cavity and electrically connected to the drive motor via a first wire to provide the stored electrical energy to the drive motor; The first wire includes a first segment and a second segment. The first segment is electrically connected to the battery. The first segment enters the wiring cavity through the storage cavity and is electrically connected to the second segment through a rotating electrical connection structure. The rotating electrical connection structure is disposed between the other end of the main shaft in the first direction and the housing. The second segment passes through the housing and is electrically connected to the drive motor. The rotating electrical connection structure includes a first conductive plate, a contact, and a second conductive plate. The first conductive plate is disposed at the other end of the main shaft in the first direction and is electrically connected to the first line segment. The contact is disposed inside the housing and is configured as an elastic slider. One end of the elastic slider is fixedly connected to the second conductive plate, and the other end slides against the first conductive plate and is configured to maintain electrical conductivity when the first conductive plate rotates relative to the contact. The second conductive plate is fixedly installed inside the housing, and the second line segment is electrically connected to the contact through the second conductive plate.

2. The electronic rear derailleur according to claim 1, characterized in that, The spindle has a first wire-passing hole at one end in the first direction perpendicular to the first direction. The first wire-passing hole connects the wiring cavity and the storage cavity, and the first wire segment passes through the first wire-passing hole.

3. The electronic rear derailleur according to claim 1, characterized in that, The length of the guide chain component extends along the second direction, and the width extends along the third direction. The third direction, the second direction, and the first direction are perpendicular to each other. The guide chain component has a side wall plate at one end in the third direction. A battery compartment and a wiring channel are provided inside the storage cavity. The wiring channel is located between the battery compartment and the side wall plate in the third direction. The battery is installed in the battery compartment. After the first line segment is electrically connected to the battery, it enters the wiring cavity through the wiring channel.

4. The electronic rear derailleur according to claim 1, characterized in that, The housing has a second wire hole perpendicular to the first direction, and the second wire segment passes through the second wire hole.

5. The electronic rear derailleur according to claim 4, characterized in that, The drive motor is mounted on the base component, and the linkage assembly includes: An inner swing block, one end of which is hinged to the base component, and the other end of which is hinged to the movable component; The external swing block is hinged at one end to the base component and at the other end to the movable component; The base component, the inner swing block, the movable component, and the outer swing block constitute a parallel four-bar linkage mechanism. The second line segment passes sequentially through the second wire hole and between the inner swing block and the outer swing block, and is electrically connected to the drive motor.

6. The electronic rear derailleur according to claim 1, characterized in that, The length of the guide chain member extends along a second direction, which is perpendicular to the first direction. A tensioning wheel is rotatably connected to one end of the guide chain member away from the main shaft in the second direction. The axis of the tensioning wheel extends along the first direction. A generator is mounted on the tensioning wheel. The generator is used to convert the mechanical energy generated by the rotation of the tensioning wheel into electrical energy and is electrically connected to the battery. The battery is capable of storing the electrical energy generated by the generator.

7. The electronic rear derailleur according to claim 6, characterized in that, The generator is an AC generator. A circuit board is installed inside the receiving cavity. The circuit board is located between the generator and the battery in the second direction. A rectifier circuit is provided on the circuit board. The rectifier circuit is electrically connected to the generator and the battery through a second wire and a third wire, respectively, and is configured to convert the AC power generated by the generator into DC power to charge the battery. The second wire and the third wire are stored in the receiving cavity.

8. A bicycle, characterized in that, Includes a frame and an electronic rear derailleur as described in any one of claims 1 to 7.

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