A derailleur for a bicycle

Abstract

The application provides a bicycle derailleur, which comprises a fixed base, a driving device, a chain guide and a connecting rod. The chain guide is configured to be movable relative to the fixed base. The connecting rod is pivotally connected between the chain guide and the fixed base. The driving device comprises a shifting member configured to be capable of shifting the connecting rod to rotate relative to the fixed base about a predetermined axis. A biasing element is arranged between the connecting rod and the shifting member. The shifting member is configured to shift the connecting rod to rotate in at least one movement direction by the biasing element. The biasing element has a main body, a first pin extended from the main body and abutting against the shifting member, and a second pin extended from the main body and abutting against the connecting rod. When viewed along the extension direction of the predetermined axis, the first pin extends from the main body towards the predetermined axis and beyond the predetermined axis. The derailleur provided by the application can provide stable derailment force during the derailment.

Description

Technical Field

[0001] This application relates to the field of bicycle technology, and more particularly to a bicycle derailleur. Background Technology

[0002] A derailleur is a crucial component of a multi-speed bicycle, used to shift the chain between different sized chainrings to achieve gear changes. Existing derailleurs include manual derailleurs pulled by a steel cable and electric derailleurs driven by a motor. Existing electric derailleurs typically include a motor assembly, a linkage, and a chain guide. The linkage and chain guide are pivotally connected, the chain passes through the chain guide, and the motor assembly applies power to the linkage to drive the chain guide, thereby shifting the chain to different chainrings. The forward and reverse rotation outputs of the motor assembly can drive the chain guide to move in opposite directions, enabling back-and-forth chain switching between different chainrings. For example, Chinese invention patent application CN1821014A discloses an electric derailleur.

[0003] The applicant discovered in their research that by adding an elastic element between the motor's output shaft and the connecting rod, and using this elastic element to apply force to the connecting rod to drive its movement, thereby actuating the chain guide, the excessive load transmitted to the motor assembly can be avoided when the chain, chain guide, or connecting rod is jammed by foreign objects or subjected to a sudden, large impact force, thus protecting the motor. The applicant further discovered that driving the connecting rod with the elastic element has a drawback: after the elastic element rotates to a certain angle, the force exerted by the motor's output shaft on it decreases, potentially leading to chain failure.

[0004] Therefore, it is necessary to propose a new technical solution to overcome the above-mentioned shortcomings.

[0005] It should be understood that the content described above, which the applicant discovered through research, does not fall within the scope of prior art. Summary of the Invention

[0006] This application provides a bicycle derailleur that can provide stable derailleur force during derailleur operation.

[0007] To achieve the above objectives, this application adopts the following technical solution: a bicycle derailleur, comprising a fixed base, a drive mechanism, a chain guide, and a connecting rod, wherein the chain guide is configured to be movable relative to the fixed base, and the connecting rod is pivotally connected between the chain guide and the fixed base; wherein the drive mechanism includes:

[0008] A toggle element configured to actuate the connecting rod to rotate relative to the fixed base about a predetermined axis;

[0009] A biasing element is provided between the connecting rod and the actuating member, and the actuating member actuates the connecting rod to rotate in at least one direction of movement through the biasing element;

[0010] The biasing element has a main body, a first pin extending from the main body and abutting against the toggle member, and a second pin extending from the main body and abutting against the connecting rod.

[0011] When viewed along the extension direction of the set axis, the first pin extends from the main body toward the set axis and extends beyond the set axis.

[0012] Optionally, the toggle member drives the first pin to rotate about the set axis.

[0013] Optionally, the actuating member rotates about the set axis, and the actuating member includes a front end near the main body and a tail end away from the main body, the front end and the tail end being located on opposite sides of the set axis.

[0014] Optionally, the portion of the first pin located on the side of the set axis away from the main body is elastically abutted against the tail end of the toggle member.

[0015] Optionally, a support post is provided on the tail end, and the first pin is supported on the cylindrical surface of the support post.

[0016] Optionally, the tail end of the actuating member is provided with an adjustment device, which is configured to adjust the height of the tail end.

[0017] Optionally, the adjusting device is an adjusting screw, which is threaded into a screw hole on the tail end and passes through the screw hole to abut against the fixed base.

[0018] Optionally, the portion of the first pin located between the set axis and the main body portion elastically abuts against the front end of the toggle member.

[0019] Optionally, the orientation of the support surface at the front end for the first pin to abut is opposite to the orientation of the support surface at the rear end for the first pin to abut.

[0020] Optionally, the biasing element is a torsion spring, which is elastically compressed between the connecting rod and the actuating member, the actuating member pushing the first pin in the direction of compression of the torsion spring.

[0021] Optionally, the toggle pushes the first pin toward the link.

[0022] Optionally, the link includes a first link and a second link, the chain guide moves in response to movement of the first link relative to the fixed base, and the second link moves in response to movement of the chain guide relative to the fixed base.

[0023] Optionally, the drive device includes a motor, a gear assembly, and a first rotating shaft driven to rotate by the motor and gear assembly. The first connecting rod is rotatably connected to the fixed base via the first rotating shaft and rotatably connected to the chain guide via a second rotating shaft.

[0024] Optionally, the actuating element is fixedly disposed relative to each other in the circumferential direction of the first rotating shaft.

[0025] Optionally, the second link is rotatably connected to the fixed base via a third pivot and rotatably connected to the chain guide via a fourth pivot;

[0026] The fixed base, the first link, the chain guide, and the second link constitute a four-bar linkage.

[0027] Optionally, the fixed base is integrally formed with a mounting cavity for accommodating the motor and the gear assembly, and the motor and the gear assembly are directly positioned and installed in the mounting cavity of the fixed base.

[0028] Optionally, the derailleur is a front derailleur.

[0029] The driving device for a bicycle derailleur provided in this application includes a derailleur. The derailleur rotates a connecting rod via a biasing element in at least one direction of motion. The biasing element has a main body, a first pin extending from the main body and abutting against the derailleur, and a second pin extending from the main body and abutting against the connecting rod. When viewed along the extension direction of a set axis, the first pin extends from the main body toward the set axis and extends beyond the set axis. This arrangement ensures that when the derailleur actuates the biasing element, it always maintains a position with the first pin in which a stable derailleur force can be applied, thus avoiding the problem of derailleur failure caused by a decrease in derailleur force due to a relative change in the position of the first pin and the derailleur during derailleur operation. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this application, and are not intended to limit this application.

[0031] Figure 1 This is a three-dimensional assembly diagram of the bicycle derailleur used in this application.

[0032] Figure 2 This is an exploded perspective view of the bicycle derailleur used in this application.

[0033] Figure 3 This is a perspective view of the bicycle derailleur display drive device of this application.

[0034] Figure 4 This is a three-dimensional assembly diagram of the bicycle derailleur after the fixing base has been removed.

[0035] Figure 5 This is a three-dimensional composite image of the bicycle derailleur after the fixing base has been removed, from another perspective.

[0036] Figure 6 This is a three-dimensional assembly diagram of the derailleur and biasing element in the bicycle derailleur of this application.

[0037] Figure 7 This is an exploded perspective view of the derailleur and biasing element in the bicycle derailleur of this application.

[0038] Figure 8 This is an exploded perspective view of the bicycle derailleur linkage and biasing element of this application.

[0039] Figure 9 This is a three-dimensional assembly diagram of the internal components of the bicycle derailleur mounting base shown in this application.

[0040] Explanation of reference numerals in the attached drawings: 100 - Derailleur; 1 - Fixed base; 11 - Connector; 101 - Mounting cavity; 2 - Chain guide; 21 - First pivot; 22 - Second pivot; 3 - Link; 31 - First link; 311 - First connecting ear; 312 - Second connecting ear; 315 - Adjusting element; 32 - Second link; 321 - Third connecting ear; 322 - Fourth connecting ear; 4 - Derailleur; 41 - Pivot; 42 - Tail end; 421 - Support column; 43 - Front end; 45 - Adjusting device; 51 - First shaft; 52 - Second shaft; 53 - Third shaft; 54 - Fourth shaft; 6 - Bias element; 61 - Main body; 62 - First pin; 63 - Second pin; 7 - Bias member; 8 - Drive device; 81 - Motor; 82 - Gear assembly; 83 - Screw; 84 - Worm gear; 9 - Battery. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by a person skilled in the art to which this application pertains. The terms "first," "second," and similar terms used in this patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or its equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These terms are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, features in the following embodiments can be combined with each other.

[0046] Please see Figures 1 to 8 As shown, this application provides a bicycle derailleur 100 for moving the chain to switch between different sized chainrings, thereby achieving gear shifting. The derailleur 100 includes a fixed base 1, a chain guide 2, a connecting rod 3, a drive device 8, a biasing element 6, a biasing component 7, and a battery 9.

[0047] Please see Figures 1 to 3As shown, the fixed base 1 serves as a base for mounting the chain guide 2, connecting rod 3, drive device 8, and battery 9, etc. At the same time, the fixed base 1 is constructed to be suitable for mounting on the bicycle frame, so that the derailleur 100 is mounted on the bicycle frame through the fixed base 1.

[0048] Please see Figure 2 As shown, the chain guide 2 is configured to be movable relative to the fixed base 1. The chain guide 2 includes two side plates arranged in approximately parallel order and two connecting edges connecting the two ends of the two side plates. The two side plates and the two connecting edges enclose a roughly rectangular space. One of the two connecting edges is connected to the fixed base 1 via a connecting rod 3. Specifically, the chain guide 2 has a first pivot portion 21 and a second pivot portion 22 near one of the two connecting edges, and the first pivot portion 21 and the second pivot portion 22 are spaced apart. The first pivot portion 21 and the second pivot portion 22 are each a pair of lugs for a pivot shaft to pass through, so as to pivotally connect the chain guide 2 to the connecting rod 3. The bicycle chain passes through the rectangular space of the chain guide 2, and during the bicycle's operation, the chain remains in a position that does not contact the two side plates and the two connecting edges of the chain guide 2, so as to avoid friction between the chain and the chain guide 2 during operation. When gear shifting is required, the chain guide 2 can be driven to move, so that the side plate of the chain guide 2 contacts the side of the chain and pushes the chain to move, so as to switch the chain on different sized pulleys and realize gear shifting.

[0049] The two ends of the connecting rod 3 are pivotally connected to the chain guide 2 and the fixed base 1, respectively. Specifically, in this embodiment, the connecting rod 3 includes a first connecting rod 31 and a second connecting rod 32. The first connecting rod 31 includes a first connecting lug 311 and a second connecting lug 312. The first connecting lug 311 is pivotally connected to the fixed base 1 via a first pivot 51, and the second connecting lug 312 is pivotally connected to the chain guide 2 via a second pivot 52. The first connecting lug 311 and the second connecting lug 312 are a pair of opposing lugs. The second connecting lug 312 corresponds to the first pivot portion 21 on the chain guide 2, such that the second pivot 52 passes through the through holes on the first pivot portion 21 and the second connecting lug 312 to pivotally connect the two. The second connecting rod 32 is constructed in a manner largely similar to that of the first connecting rod 31. Specifically, the second connecting rod 32 includes a third connecting lug 321 and a fourth connecting lug 322. The third connecting lug 321 is pivotally connected to the fixed base 1 via a third pivot 53, and the fourth connecting lug 322 is pivotally connected to the chain guide 2 via a fourth pivot 54. The third connecting lug 321 and the fourth connecting lug 322 are a pair of opposing lugs. The fourth connecting lug 322 corresponds to the second pivot portion 22 on the chain guide 2, such that the fourth pivot 54 passes through the through holes on the second pivot portion 22 and the fourth connecting lug 322 to pivotally connect them. In this embodiment, the fixed base 1 includes a detachable connector 11, and the third pivot 53 is connected to the connector 11. In this configuration, the first connecting ear 311 and the second connecting ear 312 of the first connecting rod 31 are spaced apart by a certain distance, and the third connecting ear 321 and the fourth connecting ear 322 of the second connecting rod 32 are spaced apart by a certain distance. The first rotating shaft 51 and the third rotating shaft 53 are also spaced apart by a certain distance on the fixed base 1. After the chain guide 2, the first connecting rod 31, and the second connecting rod 32 are pivotally connected through the first rotating shaft 51, the second rotating shaft 52, the third rotating shaft 53, and the fourth rotating shaft 54, the fixed base 1, the first connecting rod 31, the chain guide 2, and the second connecting rod 32 constitute a four-bar linkage. The chain guide 2 moves in response to the movement of the first connecting rod 31 relative to the fixed base 1, and the second connecting rod 32 moves in response to the movement of the chain guide 2 relative to the fixed base 1.

[0050] Please see Figure 3As shown, the driving device 8 is mounted on the fixed base 1. The driving device 8 drives the chain guide 2 to move by driving the connecting rod 3. In this embodiment, the driving device 8 includes a motor 81, a gear assembly 82 driven by the output end of the motor 81, a screw 83 driven to rotate by the gear assembly 82, a worm gear 84 meshing with the screw 83, a first rotating shaft 51 driven to rotate by the worm gear 84, and a deflector 4 sleeved on the first rotating shaft 51. The deflector 4 and the first rotating shaft 51 are fixedly arranged relative to each other in the circumferential direction of the first rotating shaft 51, that is, the first rotating shaft 51 drives the deflector 4 to rotate synchronously. The actuating element 4 is configured to actuate the connecting rod 3 to rotate relative to the fixed base 1 around a predetermined axis. Specifically, the actuating element 4 can actuate the first connecting rod 31 to rotate relative to the fixed base 1 around a first rotating shaft 51. The rotation of the first connecting rod 31 around the first rotating shaft 51 drives the chain guide 2 to move, which in turn drives the second connecting rod 32 to rotate around a third rotating shaft 53. The predetermined axis is the axis of the first rotating shaft 51 and the axis of the third rotating shaft 53. The rotation of the output end of the motor 81 is transmitted sequentially to the connecting rod 3 and the chain guide 2 through the gear assembly 82, the screw 83, the worm gear 84, the first rotating shaft 51, and the actuating element 4, thereby realizing the movement of the connecting rod 3 and the chain guide 2.

[0051] Please see Figures 4 to 8 As shown, a biasing element 6 is provided between the connecting rod 3 and the actuating member 4. The actuating member 4 actuates the connecting rod 3 to rotate via the biasing element 6 in at least one direction of movement. The biasing element 6 has a main body 61, a first pin 62 extending from the main body 61 and abutting against the actuating member 4, and a second pin 63 extending from the main body 61 and abutting against the connecting rod 3. In this embodiment, the biasing element 6 is a torsion spring, and the main body 61 is a helical portion, which is sleeved on the second rotating shaft 52. The biasing element 6 is placed between the actuating member 4 and the first connecting rod 31 in a torsional compressed state. Since the biasing element 6 is in a torsional compressed state, it has an elastic restoring force, which is a force that causes the actuating member 4 and the first connecting rod 31 to move closer to each other.

[0052] Please refer to this carefully. Figures 6 to 8 As shown, the actuating member 4 includes a pivoting part 41 and a front end 43 and a tail end 42 located on both sides of the pivoting part 41. The pivoting part 41 is sleeved on the first rotating shaft 51. The front end 43 and the tail end 42 are located on opposite sides of the first rotating shaft 51. The dashed line P1 indicates the central axis of the first rotating shaft 51 when the actuating member 4 is assembled, which is also the set axis for the rotation of the actuating member 4 and the first connecting rod 31 relative to the fixed base 1.

[0053] The biasing element 6 includes a main body 61 and a first pin 62 and a second pin 63 extending from both ends of the main body 61. When viewed along the extension direction of the setting axis P1, the first pin extends from the main body 61 toward and beyond the setting axis P1. When the biasing element 6 is assembled with the actuating member 4, the tail end 42 of the actuating member 4 is located on the side of the setting axis P1 away from the main body 61. The portion of the first pin 62 near its free end, i.e., the portion located on the side of the setting axis P1 away from the main body 61, elastically abuts against the tail end 42 of the actuating member 4. The actuating member 4 drives the first pin 62 to rotate about the setting axis P1. Further, a support post 421 is provided on the tail end 42, and the first pin 62 is supported on the cylindrical surface of the support post 421 to reduce friction between the first pin 62 and the tail end 42.

[0054] Please refer to it again. Figure 2 As shown, the tail end 42 of the actuating member 4 is provided with an adjustment device 45, which is configured to adjust the height of the tail end 42. In this embodiment, the adjustment device 45 is an adjusting screw, which is threaded into a screw hole on the tail end 42 and passes through the screw hole to abut against the fixed base 1. An adjusting member 315 for adjusting the distance between the first connecting rod 31 and the actuating member 4 is also provided. The adjusting member 315 cooperates with the adjusting device 45 to adjust the position of the chain guide 2 relative to the chain by adjusting the position of the connecting rod 3. During long-term use of the bicycle, the mechanism consisting of the connecting rod 3 and the chain guide 2 may move when subjected to external force, causing the chain passing through the chain guide 2 to be out of center within the rectangular space formed by the chain guide 2. As a result, the chain will come into contact with and rub against one of the side plates on both sides of the chain guide 2, causing abnormal noise and chain wear during riding. By adjusting the position of the connecting rod 3, the position of the chain guide 2 relative to the chain can be adjusted to avoid contact and friction between the chain and the chain guide 2. In this embodiment, the adjusting member 315 is disposed on the first connecting rod 31 and moves synchronously with the first connecting rod 31 and the actuating member 4. The adjusting member 315 is also an adjusting screw, which is connected to a screw hole on the first connecting rod 31 and passes through the screw hole to abut against the actuating member 4.

[0055] Please continue reading. Figures 6 to 8As shown, in this embodiment, the portion of the first pin 62 extending beyond the setting axis P1 abuts against the tail end portion 42 of the actuating member 4, while the portion of the first pin 62 located between the setting axis P1 and the main body 61 is suspended between the front end portion 43 of the actuating member 4. In another embodiment, the front end portion 43 of the actuating member 4 extends from the setting axis P1 toward the main body 61, and the portion of the first pin 62 located between the setting axis P1 and the main body 61 can also elastically abut against the front end portion 43 of the actuating member 4. The orientation of the support surface of the front end portion 43 for the first pin 62 to abut is opposite to the orientation of the support surface of the tail end portion 42 for the first pin 62 to abut.

[0056] Please refer to it again. Figure 4 and Figure 5 As shown, the biasing element 6 is a torsion spring, which is elastically compressed between the first connecting rod 31 and the actuating member 4. The actuating member 4 pushes the first pin 62 in the direction of compression of the torsion spring; specifically, the actuating member 4 pushes the first pin 62 closer to the first connecting rod 31. When the actuating member 4 is driven by the motor 81 or the like to drive the first pin 62 in the direction of compression of the torsion spring, that is, the actuating member 4 moves along... Figure 4 When rotating in the direction of the arrow shown, the actuating element 4 drives the first connecting rod 31 via the biasing element 6, which in turn drives the chain guide 2 and the second connecting rod 32. During this movement, the tail end 42 of the actuating element 4 remains in contact with the first pin 62, and the force transmitted from the actuating element 4 to the biasing element 6 is stable. This prevents the chain force from decreasing due to relative changes in the position of the actuating element 4, thus avoiding chain failure. When the actuating element 4 is driven by the motor 81, etc., along... Figure 4 When the rotation direction is opposite to that indicated by the middle arrow, the actuating element 4 no longer actuates the first connecting rod 31 through the biasing element 6, but instead achieves this through direct hard contact between the front end 43 of the actuating element 4 and the first connecting rod 31. In this embodiment, the direction of motion of the actuating element 4 actuating the connecting rod 3 through the biasing element 6 is the direction in which the driving chain moves from the small wheel to the large wheel; the direction of motion of the actuating element 4 driving the connecting rod 3 through hard contact is the direction in which the driving chain moves from the large wheel to the small wheel.

[0057] Please refer to it again. Figure 2 , Figure 4 and Figure 5As shown, an offset member 7 is further disposed between the second connecting rod 32 and the chain guide 2. The offset member 7 is configured to provide an offset force to the chain guide 2 in at least one moving direction relative to the fixed base 1, which is conducive to the movement of the chain guide 2. In this embodiment, the offset member 7 is a torsion spring, one end of which abuts against the second connecting rod 32, and the other end abuts against the chain guide 2. When the connecting rod 3 and the chain guide 2 move in one direction, for example, driving the chain from the small wheel to the large wheel or driving the chain from the large wheel to the small wheel, the offset member 7 is compressed to store force; when the connecting rod 3 and the chain guide 2 move in opposite directions, the compressed offset member 7 releases its elastic force, thereby facilitating the chain derailleur operation.

[0058] Please see Figure 3 and Figure 9 As shown, the fixed base 1 is integrally formed with a mounting cavity 101 for accommodating the motor 81 and the gear assembly 82. The motor 81 and the gear assembly 82 are directly positioned and mounted in the mounting cavity 101 of the fixed base 1. By directly forming the mounting cavity 101 on the fixed base 1, the problem of increased assembly errors and reduced transmission accuracy caused by adding additional gearboxes and other components can be avoided, while also reducing the number of parts. A battery 9 that provides power to the drive device 8 is detachably attached to the fixed base 1. The battery 9 is set as a relatively independent module, which can be easily disassembled for maintenance, inspection, replacement, and other operations. The detachable attachment includes connections via snap-fit, screws, magnetic adsorption, etc.

[0059] As can be seen from the above description of the specific embodiments, the bicycle derailleur 100 provided in this application includes a derailleur 4. The derailleur 4 rotates the connecting rod 3 by a biasing element 6 in at least one direction of movement. The biasing element 6 has a main body 61, a first pin 62 extending from the main body 61 and abutting against the derailleur 4, and a second pin 63 extending from the main body 61 and abutting against the connecting rod 3. When viewed along the extension direction of a set axis, the first pin 62 extends from the main body 61 toward the set axis and extends beyond the set axis. This arrangement ensures that when the derailleur 4 actuates the biasing element 6, it always maintains a position with the first pin 62 in which a stable derailleur force can be applied. This avoids the problem of derailleur failure caused by a decrease in derailleur force due to a relative change in the position of the first pin 62 and the derailleur 4 during derailleur operation.

[0060] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A bicycle derailleur, comprising a fixed base, a drive mechanism, a chain guide, and a link, the chain guide being configured to be movable relative to the fixed base, the link being pivotally connected between the chain guide and the fixed base, and a battery for providing power to the drive mechanism being attached to the fixed base; characterized in that, The driving device includes: A toggle element configured to actuate the connecting rod to rotate relative to the fixed base about a predetermined axis; A biasing element is provided between the connecting rod and the actuating member, and the actuating member actuates the connecting rod to rotate in at least one direction of movement through the biasing element; The biasing element has a main body, a first pin extending from the main body and abutting against the toggle member, and a second pin extending from the main body and abutting against the connecting rod. When viewed along the extension direction of the set axis, the first pin extends from the main body toward the set axis and extends beyond the set axis.

2. The bicycle derailleur as described in claim 1, characterized in that, The toggle element drives the first pin to rotate about the set axis.

3. The bicycle derailleur as described in claim 2, characterized in that, The actuating member rotates about the set axis, and the actuating member includes a tail end extending from the set axis in a direction away from the main body.

4. The bicycle derailleur as described in claim 3, characterized in that, The portion of the first pin located on the side of the set axis away from the main body elastically abuts against the tail end of the toggle member.

5. The bicycle derailleur as described in claim 4, characterized in that, The tail end is provided with a support post, and the first pin is supported on the cylindrical surface of the support post.

6. The bicycle derailleur as described in claim 4, characterized in that, The tail end of the actuating member is provided with an adjustment device, which is configured to adjust the height of the tail end.

7. The bicycle derailleur as described in claim 6, characterized in that, The adjustment device is an adjustment screw, which is threaded into a screw hole on the tail end and passes through the screw hole to abut against the fixed base.

8. The bicycle derailleur as described in claim 3, characterized in that, The actuating member includes a front end portion extending from the set axis toward the main body portion, and the portion of the first pin located between the set axis and the main body portion elastically abuts against the front end portion of the actuating member.

9. The bicycle derailleur as described in claim 8, characterized in that, The orientation of the support surface at the front end for the first pin to abut against is opposite to the orientation of the support surface at the rear end for the first pin to abut against.

10. The bicycle derailleur as described in any one of claims 1 to 9, characterized in that, The biasing element is a torsion spring, which is elastically compressed between the connecting rod and the actuating member, and the actuating member pushes the first pin in the direction of compression of the torsion spring.

11. The bicycle derailleur as claimed in claim 10, characterized in that, The actuator pushes the first pin toward the link.

12. The bicycle derailleur as described in claim 1, characterized in that, The linkage includes a first linkage and a second linkage, the chain guide moves in response to movement of the first linkage relative to the fixed base, and the second linkage moves in response to movement of the chain guide relative to the fixed base.

13. The bicycle derailleur as described in claim 12, characterized in that, The driving device includes a motor, a gear assembly, and a first rotating shaft driven to rotate by the motor and gear assembly. The first connecting rod is rotatably connected to the fixed base via the first rotating shaft and rotatably connected to the chain guide via a second rotating shaft.

14. The bicycle derailleur as described in claim 13, characterized in that, The actuating element is fixedly arranged in the circumferential direction of the first rotating shaft.

15. The bicycle derailleur as described in claim 12, characterized in that, The second link is rotatably connected to the fixed base via a third pivot and rotatably connected to the chain guide via a fourth pivot; The fixed base, the first link, the chain guide, and the second link constitute a four-bar linkage.

16. The bicycle derailleur as described in claim 13, characterized in that, The fixed base is integrally formed with a mounting cavity for accommodating the motor and the gear assembly, and the motor and the gear assembly are directly positioned and installed in the mounting cavity of the fixed base.

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