Locking device and rear derailleur

Abstract

The invention discloses a locking device and a rear derailleur, the locking device is mounted on the rear derailleur, the rear derailleur comprises a movable component and a chain guide component, the movable component is rotatably arranged on the chain guide component, the locking device comprises a contact piece and two limiting pieces, the contact piece is rotatably arranged on the chain guide component, and the limiting pieces are rotatably arranged on the contact piece. The contact piece is arranged on one of the movable component and the chain guide component, the two limiting pieces are arranged on the other one of the movable component and the chain guide component, and when the contact piece abuts against the two limiting pieces respectively, the chain guide component is located at different positions respectively. According to the chain guide component, the contact piece and the two limiting pieces are arranged, so that when a user assembles a chain or replaces a wheel set, the chain guide component can be fixed to a specific position only by abutting the contact piece against one of the limiting pieces, and therefore operation convenience, reliability and operation efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bicycles, and particularly to a locking device and a rear derailleur. Background Art

[0002] In modern bicycle drive systems, the introduction of a transmission has significantly improved riding efficiency and adaptability. In particular, the rear derailleur enables precise switching of the chain between different sprocket teeth through a chain guide (rear derailleur). The core components of the rear derailleur include a guide plate, guide wheels, and a tension spring system. Its function is not only to guide the chain trajectory but also to maintain reasonable chain tension during gear shifting. However, during the supporting operations after installing the transmission, such as chain assembly or wheel set replacement, operators often face difficulties in operation due to insufficient space in the rear derailleur guide plate.

[0003] In traditional designs, the rear derailleur guide plate automatically returns to the closed position by spring tension to ensure chain stability during riding. However, during installation or maintenance, the operator needs to manually pull the guide plate outward to a specific angle to expand the gap between the guide wheel and the sprocket teeth, facilitating chain threading or wheel set disassembly. This operation faces two major challenges: First, manually maintaining the open state of the guide plate requires both hands, reducing operation efficiency, especially in confined spaces or complex environments. Second, lacking a clear positioning mechanism, the guide plate is prone to accidental closing due to spring rebound or external interference, resulting in installation errors or component wear, and even potentially causing chain jams.

[0004] Although there are solutions in the prior art to fix the guide plate with temporary tools, such methods increase the operation steps and tool dependence, and may damage the surface of the guide plate due to insufficient tool adaptability. Summary of the Invention

[0005] The objective of the present invention is to provide a locking device and a rear derailleur, aiming to solve the problems of inconvenient operation and low efficiency in chain assembly or wheel set replacement of existing bicycles.

[0006] An embodiment of the present invention provides a locking device installed on a rear derailleur. The rear derailleur includes a movable member and a chain guiding member. The movable member is rotatably disposed on the chain guiding member. The locking device includes a contact member and two limiting members. The contact member is disposed on one of the movable member and the chain guiding member, and the two limiting members are both disposed on the other of the movable member and the chain guiding member. When the contact member abuts against the two limiting members respectively, the chain guiding member is in different positions respectively.

[0007] Further, the contact member includes a first contact member and a second contact member, and the two limiting members are respectively a first limiting member and a second limiting member. When the first contact member abuts against the first limiting member, the chain guiding member is in the first position, and when the second contact member abuts against the second limiting member, the chain guiding member is in the second position.

[0008] Further, both the first limiting member and the second limiting member are disposed outside the movable member, and the first limiting member and the second limiting member are arranged along the circumference of the movable member. Both the first contact member and the second contact member are disposed on the side of the chain guiding member connected to the movable member.

[0009] Further, when observed in a direction parallel to the side surface of the chain guiding member, the maximum height of the first contact member is greater than the minimum height of the first limiting member, the maximum height of the first contact member is less than the minimum height of the second limiting member, and the maximum height of the second contact member is greater than the minimum height of the second limiting member.

[0010] Further, when observed in a direction perpendicular to the side surface of the chain guiding member, the minimum distance between the first contact member and the center of the movable member is less than the maximum distance between the first limiting member and the center of the movable member, and the minimum distance between the second contact member and the center of the movable member is less than the maximum distance between the second limiting member and the center of the movable member.

[0011] Further, a clamping portion is provided on the second limiting member, and a cooperating portion cooperating with the clamping portion is provided on the second contact member.

[0012] Further, the distance between the outer side of the first limiting member and the center of the movable member increases along a first direction, and the distance between the outer side of the second limiting member and the center of the movable member increases along the first direction.

[0013] Further, it further includes a first elastic member, and two ends of the first elastic member are respectively connected to the movable member and the chain guiding member.

[0014] Further, it further includes a second elastic member, and two ends of the second elastic member are respectively connected to the second contact member and the chain guiding member.

[0015] An embodiment of the present invention further provides a rear derailleur, including the above locking device.

[0016] The present invention discloses a locking device and a rear derailleur. The locking device is installed on the rear derailleur. The rear derailleur includes a movable member and a chain guiding member. The movable member is rotatably arranged on the chain guiding member. The locking device includes a contact member and two limiting members. The contact member is arranged on one of the movable member and the chain guiding member, and the two limiting members are both arranged on the other of the movable member and the chain guiding member. When the contact member abuts against the two limiting members respectively, the chain guiding member is in different positions respectively. By providing the contact member and the two limiting members, when the user assembles the chain or replaces the wheel set, the user only needs to abut the contact member against one of the limiting members to fix the chain guiding member at a specific position, thereby improving the convenience, reliability and operation efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 Schematic structural diagram of the rear derailleur in the normal state from the first perspective;

[0019] Figure 2 Schematic structural diagram of the rear derailleur in the normal state from the second perspective;

[0020] Figure 3 Exploded view of the rear derailleur;

[0021] Figure 4 Schematic structural diagram of the rear derailleur in the adjusted state;

[0022] Figure 5 Schematic diagram of the heights of the contact members and limiting members on the rear derailleur;

[0023] Figure 6 Schematic structural diagram of the movable member from the first perspective;

[0024] Figure 7 Schematic structural diagram of the second contact member from the first perspective;

[0025] Figure 8 Schematic structural diagram of the movable member from the second perspective;

[0026] Figure 9 Schematic structural diagram of the second contact member from the second perspective;

[0027] Explanation of the marks in the figures:

[0028] 1. Movable member; 2. Chain guiding member; 3. Contact member; 4. Limiting member; 5. First limiting member; 6. Second limiting member; 7. First contact member; 8. Second contact member; 9. Clamping portion; 10. Matching portion; 11. First elastic member; 12. Second elastic member; 13. Installation groove; 14. Installation hole. Specific embodiments

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0031] It should also be understood that the terms used in this specification of the present invention are merely for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0032] It should be further understood that the term " / and / " used in this specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0033] Please refer to Figures 1-4 , this embodiment provides a locking device installed on a rear derailleur. The rear derailleur includes a movable member 1 and a chain guiding member 2. The movable member 1 is rotatably arranged on the chain guiding member 2. The locking device includes a contact member 3 and two limiting members 4. The contact member 3 is arranged on one of the movable member 1 and the chain guiding member 2, and the two limiting members 4 are both arranged on the other of the movable member 1 and the chain guiding member 2. When the contact member 3 abuts against the two limiting members 4 respectively, the chain guiding member 2 is in different positions respectively.

[0034] In this embodiment, by providing the contact member 3 and two limiting members 4, when the user assembles the chain or replaces the wheel set, the user only needs to abut the contact member 3 against one of the limiting members 4 to fix the chain guiding member 2 at a specific position, without the user's hands having to maintain the chain guiding member 2 in the operating position, thus liberating the user's hands and enabling the user's hands to be used for chain assembly or wheel set replacement, thereby improving the convenience, reliability and operation efficiency of the operation.

[0035] Among them, as Figure 2 shown, when the rear derailleur is in the normal state: the contact member 3 abuts against the first limiting member 4, and the chain guiding member 2 is in the closed position to ensure the stable operation of the chain.

[0036] As Figure 4 shown, when the rear derailleur is in the adjustment state: under the action of an external force, the chain guiding member 2 rotates counterclockwise to disengage the contact member 3 from the first limiting member 4, moves counterclockwise to the position of the second limiting member 4 and abuts against it, and the chain guiding member 2 expands to a larger angle (such as more than 100 degrees), facilitating the disassembly and assembly of the wheel set or the adjustment of the chain.

[0037] It should be noted that the counterclockwise rotation in this embodiment is based on the observation perpendicular to the side of the chain guiding member 2 where it is rotatably connected to the movable member 1, and when observing along the side of the chain guiding member 2 perpendicular to the side where it is rotatably connected to the movable member 1, the movable member 1, the contact member 3 and the limiting member 4 can be observed. The subsequent counterclockwise and clockwise are also based on the observation perpendicular to the side of the chain guiding member 2 where it is rotatably connected to the movable member 1, and this will not be elaborated further hereafter.

[0038] In some embodiments, only one contact member 3 may be provided, and the two limiting members 4 are respectively the first limiting member 5 and the second limiting member 6. When the contact member 3 abuts against the first limiting member 5, the chain guiding member 2 is in the first position, and when the contact member 3 abuts against the second limiting member 6, the chain guiding member 2 is in the second position. Specifically, the contact member 3 is designed as a rigid boss rotatably arranged on the movable member 1. At this time, the contact member 3 rotates around an axis parallel to the side surface of the chain guiding member 2, and the abutting part of the contact member 3 can gradually move away from or close to the chain guiding member 2 along the rotation direction, and the shape can be a cylindrical, square or special-shaped protrusion. The first limiting member 5 and the second limiting member 6 are the first groove and the second groove provided on the chain guiding member 2, and the depth and angle of the groove match the boss.

[0039] When the chain guide member 2 rotates, the boss slides into the first groove (corresponding to the derailleur being in the normal state) or the second groove (corresponding to the derailleur being in the adjusted state). By the side wall of the groove blocking the side of the boss, the position locking is achieved. A gradually rising ramp structure can be added in the groove in the clockwise direction to facilitate guiding when the boss slides out of the first groove. When it is necessary to reset the chain guide member 2 to the normal state, just rotate the boss to a position away from the chain guide member 2, and then rotate the chain guide member 2 clockwise. When the boss is between the first groove and the second groove, release the boss. At this time, the boss abuts against the chain guide member 2. Then rotate the chain guide member 2 clockwise. When the boss snaps into the first groove, the reset of the chain guide member 2 is completed.

[0040] Among them, to ensure that the boss can always abut against the chain guide member 2, a torsion spring can be arranged between the boss and the movable member 1 to ensure that the torsion spring can always exert a force perpendicular to the chain guide member 2 on the boss, thereby ensuring that the front surface of the boss abuts against the chain guide member 2.

[0041] Similarly, the contact member 3 can also be designed as a rigid boss rotatably arranged on the chain guide member 2, and the shape can be a cylindrical, square or special-shaped protrusion. The first limiting member 5 and the second limiting member 6 are the first groove and the second groove arranged on the movable member 1.

[0042] In some embodiments, only one contact member 3 can be provided, and the two limiting members 4 are respectively the first limiting member 5 and the second limiting member 6. When the contact member 3 abuts against the first limiting member 5, the chain guide member 2 is in the first position. When the contact member 3 abuts against the second limiting member 6, the chain guide member 2 is in the second position. Specifically, the contact member 3 is a telescopic spring pin installed on the chain guide member 2, and the pin head is hemispherical to reduce friction. The first limiting member 5 and the second limiting member 6 are respectively the first hole and the second hole arranged on the movable member 1, and the hole diameters are slightly larger than the diameter of the pin head.

[0043] When the chain guide member 2 rotates to the normal state, the spring pin is pressed into the first limiting hole, and the pin head pops out and locks. When it needs to be unfolded, an external force is applied to make the pin head retract, and the chain guide member 2 continues to rotate to the second limiting hole and pops out and locks again. The spring pin can be triggered to retract by a manual button or the mechanical force when the chain guide member 2 rotates.

[0044] Among them, the first limiting member 5 can also be a protrusion structure, and the clockwise limit of the chain guide member 2 is achieved by the side surface of the spring pin abutting against the protrusion structure.

[0045] Similarly, the contact member 3 can also be a telescopic spring pin installed on the movable member 1, and the pin head is hemispherical to reduce friction. The first limiting member 5 and the second limiting member 6 are respectively the first hole and the second hole arranged on the chain guide member 2.

[0046] In some embodiments, only one contact member 3 may be provided, and the two limiting members 4 are respectively the first limiting member 5 and the second limiting member 6. When the contact member 3 abuts against the first limiting member 5, the chain guide member 2 is in the first position, and when the contact member 3 abuts against the second limiting member 6, the chain guide member 2 is in the second position. Specifically, the contact member 3 is an elastic buckle (such as a plastic or metal spring) on ​​the chain guide member 2, and a V-shaped or arc-shaped notch is provided at the end of the buckle. The first limiting member 5 and the second limiting member 6 are respectively the first convex point and the second convex point provided on the movable member 1, and the diameter of the first convex point and the diameter of the second convex point both match the buckle notch.

[0047] When the chain guide member 2 rotates, the notch of the elastic buckle is engaged with the first protrusion (corresponding to the rear derailleur being in a normal state) or the second protrusion (corresponding to the rear derailleur being in an adjustment state), and the locking force is provided by the deformation of the spring sheet. When unlocking is required, the chain guide member 2 is manually moved, and the spring sheet is deformed and separated from the protrusion.

[0048] Similarly, the contact member 3 is an elastic buckle (such as a plastic or metal spring) on ​​the movable member 1, and a V-shaped or arc-shaped notch is provided at the end of the buckle. The first stopper 5 and the second stopper 6 are respectively the first convex point and the second convex point provided on the chain guide member 2, and the diameter of the first convex point and the diameter of the second convex point both match the buckle notch.

[0049] In this embodiment, the contact member 3 includes: a first contact member 7 and a second contact member 8, and the two limiting members 4 are respectively a first limiting member 5 and a second limiting member 6. When the first contact member 7 abuts against the first limiting member 5, the chain guide member 2 is in the first position, and when the second contact member 8 abuts against the second limiting member 6, the chain guide member 2 is in the second position.

[0050] The rear derailleur is in the first position (normal state): the first contact member 7 is in contact with the first limit member 5, and the chain guide member 2 is in the closed position, ensuring stable operation of the chain.

[0051] The rear derailleur is in the second position (adjustment state): external force is applied to rotate the chain guide member 2, the first contact member 7 disengages from the first limit member 5, the second contact member 8 moves to the position of the second limit member 6 and abuts against it, and the chain guide member 2 expands to a larger angle (such as more than 100 degrees) to facilitate wheel disassembly or chain adjustment.

[0052] In this embodiment, the contact member 3 and the limiting member 4 are designed as two independent groups of structures. Each group of contact limiting structures only bears the locking load of a single position, thereby avoiding wear or deformation caused by long-term force on a single contact point.

[0053] Furthermore, the first limit member 5 and the second limit member 6 are both arranged on the outside of the movable component 1, and the first limit member 5 and the second limit member 6 are arranged along the circumference of the movable component 1, and the first contact member 7 and the second contact member 8 are both arranged on the side of the chain guide component 2 connected to the movable component 1.

[0054] Specifically, two limiting bosses are processed along the circumferential direction on the outer side of the movable member 1, which serve as the first limiting member 5 and the second limiting member 6 respectively. The first limiting member 5 is located at the 0° reference position of the circumference of the movable member 1 (corresponding to the chain guide member 2 being in a normal state), and is in the shape of a strip-shaped boss, which is arranged along the height direction of the movable member 1, and the height direction is perpendicular to the side of the chain guide member 2. The second limiting member 6 is located at the 100° position of the circumference of the movable member 1 (corresponding to the chain guide member 2 being in an adjustment state, or other angular positions, such as the 90° position, etc., which are not limited to this), and is in the shape of a special-shaped boss. Two contact members 3 are provided on one side of the chain guide member 2 connected to the movable member 1, which serve as the first contact member 7 and the second contact member 8 respectively. The first contact member 7 is a limiting screw, which is screwed into and fixed on the chain guide member 2 by a thread. The second contact member 8 is a rotating arm, which is rotatably mounted on the chain guide member 2 by a rotating shaft bolt.

[0055] When the chain guide member 2 is in a normal state, the first contact member 7 abuts against the first limiting member 5, thereby achieving fixation.

[0056] When the user bends the chain guide member 2 counterclockwise outward, the chain guide member 2 drives the first contact member 7 to disengage from the first stop member 5, and when it continues to rotate to the 100° position, the second contact member 8 is rotated so that the second contact member 8 is inserted into the rear of the second stop member 6 (the rear is the side of the second stop member 6 away from the first stop member 5), thereby fixing the chain guide member at the second position.

[0057] After completely replacing the wheel set, the user then bends the chain guide member 2 outward, and then rotates the second contact member 8 so that the second contact member 8 disengages from the second limit member 6. The chain guide member 2 can then be rotated to the first position, and the first contact member 7 re-adheses to the first limit member 5.

[0058] In this embodiment, please refer to Figure 5 , observed in a direction parallel to the side of the chain guide member 2, the maximum height of the first contact member 7 is greater than the minimum height of the first limit member 5, the maximum height of the first contact member 7 is less than the minimum height of the second limit member 6, and the maximum height of the second contact member 8 is greater than the minimum height of the second limit member 6.

[0059] The first contact member 7 is fixed to the chain guiding member 2, and its maximum height is H1. The first limiting member 5 is arranged on the movable member 1, and its minimum height is h1. The design satisfies: H1 > h1, which can ensure that when the chain guiding member 2 is in the first position, the first contact member 7 reliably abuts against the first limiting member 5 and forms a stable lock.

[0060] The second limiting member 6 is located on the movable member 1, and its minimum height is h2. The design satisfies: H1 < h2, which avoids interference between the first contact member 7 and the second limiting member 6 when the chain guiding member 2 switches from the first position to the second position, ensuring smooth switching.

[0061] The second contact member 8 is arranged on the chain guiding member 2, and its maximum height is H2. The design satisfies: H2 > h2. When the guide plate expands to the second position, the second contact member 8 abuts against the second limiting member 6 and forms a mechanical lock, thereby preventing loosening.

[0062] In this embodiment, please refer to Figure 1 When observing along the direction perpendicular to the side surface of the chain guiding member 2, the minimum distance between the first contact member 7 and the center of the movable member 1 is less than the maximum distance between the first limiting member 5 and the center of the movable member 1, and the minimum distance between the second contact member 8 and the center of the movable member 1 is less than the maximum distance between the second limiting member 6 and the center of the movable member 1.

[0063] Among them, since the second contact member 8 is rotatably arranged on the chain guiding member 2, the minimum distance between the second contact member 8 and the center of the movable member 1 is: the minimum distance between the second contact member 8 and the center of the movable member 1 within the rotation range of the second contact member 8.

[0064] The minimum distance between the first contact member 7 and the center of the movable member 1 is D1_min. The maximum distance between the first limiting member 5 and the center of the movable member 1 is d1_max. The design satisfies: D1_min < d1_max. This relationship ensures that when the chain guiding member 2 is in the first position, the first contact member 7 can reliably abut against the first limiting member 5, avoiding lock failure due to insufficient distance.

[0065] The minimum distance between the second contact member 8 and the center of the movable member 1 is D2_min. The maximum distance between the second limiting member 6 and the center of the movable member 1 is d2_max. The design satisfies: D2_min < d2_max. This relationship ensures that when the chain guiding member 2 expands to the second position, the second contact member 8 can effectively abut against the second limiting member 6 to achieve dead point locking.

[0066] Further, one end of the second contact member 8 is rotatably arranged on the chain guiding member 2. When observed in a direction perpendicular to the side surface of the chain guiding member 2, the minimum distance between one end of the second contact member 8 and the center of the movable member 1 is greater than the maximum distance between the second limiting member 6 and the center of the movable member 1, and the minimum distance between the other end of the second contact member 8 and the center of the movable member 1 is less than the maximum distance between the second limiting member 6 and the center of the movable member 1.

[0067] The minimum distance between one end (rotating end) of the second contact member 8 and the center of the movable member 1 is DAmin. The maximum distance between the second limiting member 6 and the center of the movable member 1 is d2_max. The design satisfies: DAmin > d2_max. This relationship ensures that when the rotating end serves as the rotation fulcrum, it is always located outside the second limiting member 6, avoiding interference between the rotating end and the second limiting member 6 during the rotation of the chain guiding member 2.

[0068] The minimum distance between the other end (abutting end) of the second contact member 8 and the center of the movable member 1 is DBmin. The design satisfies: DBmin < d2_max. This relationship enables the B end to move to the inside of the second limiting member 6 and abut against it to form a mechanical lock when the chain guiding member 2 extends to the second position.

[0069] In this embodiment, please refer to Figure 6 and Figure 7 , a clamping portion 9 is provided on the second limiting member 6, and a cooperating portion 10 cooperating with the clamping portion 9 is provided on the second contact member 8.

[0070] The second limiting member 6 is arranged on the side surface of the movable member 1, and a clamping portion 9, specifically a clamping convex block, is provided at its end, forming a clamping groove with the outside of the movable member 1. The cooperating portion 10 of the second contact member 8 is a cooperating convex block, which is matched with the clamping groove of the clamping portion 9.

[0071] In this embodiment, through the matching of the clamping portion 9 and the cooperating portion 10, a highly reliable lock of the chain guiding member 2 in the extended state is achieved.

[0072] In this embodiment, please refer to Figure 8 , the distance between the outside of the first limiting member 5 and the center of the movable member 1 increases in the first direction, and the distance between the outside of the second limiting member 6 and the center of the movable member 1 increases in the first direction.

[0073] Both the first limiting member 5 and the second limiting member 6 are arranged on the side surface of the movable member 1. The outer profiles of the first limiting member 5 and the second limiting member 6 are involute arcs. Along the first direction, the distances from each point on the outside of the first limiting member 5 and the second limiting member 6 to the center of the movable member 1 gradually increase. The increasing distance design avoids the contact pressure of the contact member and the limiting member acting concentratedly on a certain fixed area, reduces local wear, and prolongs the service life of the limiting member and the contact member.

[0074] The first direction may be clockwise or counterclockwise, and the specific setting direction depends on the actual situation.

[0075] In this embodiment, please refer to Figure 3 , and further includes: a first elastic member 11, two ends of which are respectively connected to the movable member 1 and the chain guide member 2.

[0076] When the chain guide member 2 is in a normal state: the first elastic member 11 is in a natural length (preload force 0N), the first elastic member 11 can also be in a compressed state, and at this time the first elastic member 11 applies a clockwise force to the chain guide member 2, and the chain guide member 2 is locked with the first limit member 5 through the first contact member 7.

[0077] When the chain guide member 2 is in the adjustment state: when the user moves the chain guide member 2 to the second position, the first elastic member 11 is compressed to store elastic potential energy.

[0078] When the chain guide member 2 is reset: after the chain guide member 2 is released, the first elastic member 11 is released to pull the chain guide member 2 to rotate until the first contact member 7 abuts against the first limit member 5 again, and the reset is completed.

[0079] When the chain guide member 2 approaches the first position, the elastic preload force can assist the first contact member 7 to press the inclined surface of the first limit member 5, thereby enhancing the self-locking effect.

[0080] In this embodiment, please refer to Figure 3 , and further includes: a second elastic member 12, two ends of the second elastic member 12 are respectively connected to the second contact member 8 and the chain guide member 2.

[0081] Specifically, the second elastic member 12 is sleeved on one end of the second contact member 8, and the other end of the second contact member 8 is provided with a mounting groove 13 (such as Figure 9 As shown), the chain guide member 2 is provided with a mounting hole 14 (as shown Figure 3 As shown in FIG. 1 , two ends of the second elastic member 12 are respectively arranged in the mounting groove 13 and the mounting hole 14 to apply a counterclockwise force to the second contact member 8 .

[0082] Initial state: the second contact member 8 is pressed against the inner side of the chain guide member 2 (counterclockwise limit position) by the second elastic member 12 , and has no contact with the second limit member 6 .

[0083] Locking process: When the user pushes the chain guide member 2 to the second position, such as the 100° position, the second contact member 8 needs to be rotated clockwise to compress the second elastic member 12 to store elastic potential energy.

[0084] Automatic reset: The user continues to bend the chain guide member 2 counterclockwise by a certain angle, for example, more than 10 degrees. At this time, the chain guide member 2 is located at a position above 110°. The second contact member 8 disengages from the second limiting member 6, and the second elastic member 12 releases its potential energy to drive the second contact member 8 to rotate counterclockwise until it returns to the initial position. The first elastic member 11 releases its pulling force to drive the chain guide member 2 to rotate until the first contact member 7 abuts against the first limiting member 5 again, completing the reset.

[0085] In this embodiment, when the second contact member 8 abuts against the second limiting member 6, under the clockwise acting force provided by the first elastic member 11 and the counterclockwise acting force provided by the second elastic member 12, the second contact member 8 and the second limiting member 6 are in a dead point state and will not become loose.

[0086] Among them, the first elastic member 11 and the second elastic member 12 can be designed with a torsion spring or a spring structure.

[0087] In some embodiments, the first contact member 7 is a limit screw installed on the chain guide member 2, the first limiting member 5 is provided as a convex block and installed on the outside of the movable member 1, the second contact member 8 is a permanent magnet embedded in the chain guide member 2, and the magnetic pole direction corresponds to that of the second limiting member 6. The second limiting member 6 is a magnetic metal block provided on the movable member 1.

[0088] Through the hard contact between the limit screw and the convex block, physical limits against vibration and impact can be provided, thereby ensuring the stable operation of the rear derailleur in a normal state. The non-contact locking between the second contact member 8 and the second limiting member 6 is achieved by magnetic pole adsorption, and there is no friction and wear between the second contact member 8 and the second limiting member 6, improving the service life of the second contact member 8 and the second limiting member 6.

[0089] Among them, the first limiting member 5 can also be a magnetic metal block provided on the movable member 1. In this way, the adjustment between the first position and the second position can be achieved by setting one contact member 3, or the adjustment between the first position and the second position can also be achieved by setting two contact members 3.

[0090] In some embodiments, by providing a gear on both the movable member 1 and the chain guide member 2, the gears on the movable member 1 and the chain guide member 2 mesh with each other, and then by providing a driving member to drive one of the gears to rotate, the other gear can be driven to rotate, thereby realizing the automatic adjustment of the position of the chain guide member 2.

[0091] This embodiment also provides a rear derailleur, including: the locking device of the above embodiment.

[0092] The various embodiments in the specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0093] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion.

[0094] Inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device. Without more limitations, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

Claims

1. A locking device mounted on a rear derailleur, the rear derailleur comprising: A movable component and a chain guide component, wherein the movable component is rotatably arranged on the chain guide component, and is characterized in that the locking device comprises: a contact piece and two limit pieces, wherein the contact piece is arranged on one of the movable component and the chain guide component, and the two limit pieces are arranged on the other of the movable component and the chain guide component, and when the contact piece respectively abuts against the two limit pieces, the chain guide component is in different positions respectively.

2. The locking device according to claim 1, characterized in that: The contact member includes: a first contact member and a second contact member, and two limiting members are respectively a first limiting member and a second limiting member. When the first contact member abuts against the first limiting member, the chain guide member is in a first position, and when the second contact member abuts against the second limiting member, the chain guide member is in a second position.

3. The locking device according to claim 2, characterized in that: The first limiter and the second limiter are both arranged on the outside of the movable member, and the first limiter and the second limiter are arranged along the circumference of the movable member, and the first contact member and the second contact member are both arranged on one side of the chain guide member connected to the movable member.

4. The locking device according to claim 3, characterized in that: When viewed in a direction parallel to the side surface of the chain guide member, the maximum height of the first contact member is greater than the minimum height of the first limit member, the maximum height of the first contact member is less than the minimum height of the second limit member, and the maximum height of the second contact member is greater than the minimum height of the second limit member.

5. The locking device according to claim 3, characterized in that: When observed in a direction perpendicular to the side surface of the chain guide member, the minimum distance between the first contact member and the center of the movable member is smaller than the maximum distance between the first limiting member and the center of the movable member, and the minimum distance between the second contact member and the center of the movable member is smaller than the maximum distance between the second limiting member and the center of the movable member.

6. The locking device according to claim 3, characterized in that: The second position-limiting member is provided with a clamping portion, and the second contact member is provided with a matching portion matching with the clamping portion.

7. The locking device according to claim 3, characterized in that: The distance between the outer side of the first limiting member and the center of the movable member increases along the first direction, and the distance between the outer side of the second limiting member and the center of the movable member increases along the first direction.

8. The locking device according to claim 1, characterized in that: Also includes: A first elastic member, wherein two ends of the first elastic member are respectively connected to the movable member and the chain guide member.

9. The locking device according to claim 2, characterized in that: Also includes: The second elastic member has two ends connected to the second contact member and the chain guide component respectively.

10. A rear derailleur, characterized in that: include: A locking device as claimed in any one of claims 1 to 9.

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