Bicycle shifter and bicycle

Abstract

The application provides a bicycle gear shifter and a bicycle. The bicycle gear shifter comprises a housing with a bracket, a winding member rotatably mounted on a rotating shaft of the bracket, a ratchet sleeved on the winding member, a pawl member movably connected with the bracket in the circumferential direction of the ratchet, a release lever and a push rod rotatably connected with the rotating shaft. The circumferential direction of the ratchet is provided with a first tooth portion and a second tooth portion. The pawl member is provided with a positioning pawl facing the first tooth portion and a release pawl facing the second tooth portion at two ends respectively. The positioning pawl and the release pawl are located at opposite sides of the ratchet. The release lever is hinged with the bracket and can drive the pawl member to slide relative to the bracket, so that the positioning pawl is engaged with or disengaged from the first tooth portion or the release pawl is engaged with or disengaged from the second tooth portion. The push rod is hinged with a pushing pawl. The push rod can drive the pushing pawl to engage with the second tooth portion. The bicycle gear shifter and the bicycle both have the advantages of simple structure and reliable operation.

Description

Technical Field

[0001] The present invention relates to the technical field of bicycles, in particular to a bicycle shifter and a bicycle using the shifter. Background Art

[0002] The shifting mechanism of an existing bicycle shifter typically includes a ratchet assembly, a positioning pawl, and a release pawl. The ratchet assembly includes a positioning ratchet and a release ratchet that rotate synchronously. When the bicycle is shifting down, the positioning pawl rotates and releases the locking of the positioning ratchet in its current position, causing the ratchet assembly to retract under the action of a return spring. As the ratchet assembly retracts, the release pawl moves toward the release ratchet until it engages with the release ratchet, ensuring that the positioning ratchet does not retract after retracting one tooth position. When the positioning pawl is reset, it reengages with a new tooth position of the positioning ratchet, positioning the ratchet assembly in its current state. The release pawl disengages from the release ratchet, releasing the locking of the ratchet assembly, thereby completing the shifting operation. At this point, the cable drum fixedly connected to the ratchet assembly rotates along with the ratchet assembly according to a preset stroke, causing the cable drum to release the shift cable, allowing the shift cable to adjust the front or rear derailleur, thereby achieving the shifting operation of the bicycle.

[0003] However, some existing bicycle shifters have separate positioning pawls and release pawls, and the ratchet assembly requires a positioning ratchet that mates with the positioning pawl and a release ratchet that mates with the release pawl. This results in a less compact structure, poor linkage, large space requirements, a complex structure, and high production costs. In a bicycle shifter disclosed in Chinese patent document CN1097542C, although the positioning pawl and release pawl are integrally formed into a pawl component, and the positioning ratchet and release ratchet are integrated into a common ratchet, the two ratchet teeth of the pawl component are located on one side of the mating ratchet. This means that only one end of the pawl component and the ratchet teeth on the ratchet wheel are subjected to force, which can easily cause the pawl component to deviate from the rotating shaft to which it is connected. Therefore, an additional retaining plate is required to additionally secure the ratchet and pawl components, increasing the structural complexity of the bicycle shifter. Chinese patent document CN1765694B discloses a bicycle transmission, in which a ratchet wheel is provided with three rows of teeth, two rows of teeth cooperating with a positioning pawl and a release pawl of a pawl member, and the other row of teeth cooperating with a pushing pawl of a push rod. This increases the complexity of ratchet manufacturing and increases the size and cost of the ratchet wheel. Summary of the Invention

[0004] In order to solve the above problems, the main object of the present invention is to provide a bicycle shifter with a simple structure and reliable operation.

[0005] Another object of the present invention is to provide a bicycle that is simple in structure and reliable in operation.

[0006] In order to achieve the main purpose of the present invention, the present invention provides a bicycle shifter, including a housing, a winding member, a ratchet and a fourth elastic member. A bracket is fixedly installed in the housing, a rotating shaft is provided on the bracket, the winding member is rotatably connected to the rotating shaft around the axis of the rotating shaft, the ratchet is fixedly sleeved on the winding member, a first tooth portion and a second tooth portion are provided on the circumference of the ratchet, the fourth elastic member is provided on the winding member, and a reset force is provided to the winding member, wherein the bicycle shifter also includes a pawl member, a fifth elastic member release rod and a push rod, the pawl member is movably connected to the bracket, the pawl member is located on the circumference of the ratchet, and a positioning pawl and a release pawl are respectively provided at both ends of the pawl member. The positioning pawl The pawl and the release pawl are located on opposite sides of the ratchet, the positioning pawl is set toward the first tooth portion, and the release pawl is set toward the second tooth portion. The fifth elastic member is provided on the pawl component to provide it with a reset force. The release lever is hinged to the bracket, and the release lever can move the pawl component relative to the bracket to disengage the positioning pawl from the first tooth portion and engage the release pawl with the second tooth portion. When the release lever is released, under the action of the fifth elastic member, the positioning pawl is engaged with the next tooth of the first tooth portion and the release pawl is disengaged from the second tooth portion. The push rod is rotatably connected to the rotating shaft around the axis of the rotating shaft. A pushing pawl is hinged on the push rod, and the pushing pawl is set toward the second tooth portion. The push rod can rotate around the rotating shaft and drive the pushing pawl to engage with the second tooth portion.

[0007] As can be seen from the above, through the structural design of the bicycle shifter, the positioning pawl and the release pawl are integrally formed into a pawl component, thereby ensuring the linkage between the positioning pawl and the release pawl, and avoiding gear shifting during the shifting process of the bicycle shifter. By setting the relative positions of the positioning pawl and the release pawl, the positioning pawl and the release pawl are avoided from being concentrated on one side of the ratchet, ensuring that the force on both sides of the ratchet is evenly distributed, thereby avoiding the need to set a holding plate to assist in fixing the ratchet and pawl component, simplifying the structure of the bicycle shifter, and reducing the manufacturing cost of the bicycle shifter.

[0008] A preferred solution is that the pawl member is arranged in an arc shape, the pawl member half surrounds the outside of the ratchet, and the positioning pawl and the releasing pawl are arranged opposite to each other.

[0009] As can be seen from the above, the pawl member is arranged in an arc shape and is semi-circled outside the ratchet wheel, so that the space occupied by the pawl member can be saved to the greatest extent and interference between the pawl member and the ratchet wheel can be avoided.

[0010] A further solution is that a first slide groove is further provided at the first end of the pawl member, a second slide groove is further provided at the second end of the pawl member, a first pin shaft and a second pin shaft are provided on the bracket, and the first pin shaft is connected to the first slide groove, and the second pin shaft is connected to the second slide groove.

[0011] As can be seen from the above, the first slide groove and the second slide groove play a guiding role in the sliding of the pawl component, and through the structural design of the first slide groove and the second slide groove, the pawl component can also swing at a certain angle when sliding relative to the bracket, so that the release pawl can be smoothly disengaged from the second tooth portion, the positioning pawl can be reliably engaged with the first tooth portion, and it is ensured that the ratchet has sufficient rotation space when decelerating, thereby improving the deceleration reliability. At the same time, it can also avoid the ratchet from being disengaged or stuck during the deceleration process.

[0012] A further solution is that a push block is provided on the release lever, a protrusion is provided on the pawl member, and the push block is adjacent to the protrusion.

[0013] As can be seen from the above, the push block on the release rod and the protrusion on the pawl member can improve the reliability of the release rod pushing the pawl member to slide, and the protrusion plays a certain guiding role in the sliding of the pawl member, avoiding the pawl member from applying a force perpendicular to the second sliding groove when the push block directly acts on the pawl member, thereby avoiding the pawl member from being stuck and unable to slide along the second sliding groove.

[0014] A further solution is that a first elastic member is connected between the release rod and the housing.

[0015] As can be seen from the above, the first elastic member is used to assist the release lever in resetting.

[0016] Another preferred solution is that the bracket is provided with a guide portion at the pushing claw, and the guide portion is adjacent to the pushing claw.

[0017] As can be seen from the above, the guide part is used to guide and limit the push pawl. When the push rod is reset, it drives the push pawl to disengage from the ratchet, preventing the push pawl from engaging with the second tooth portion of the ratchet after reset, and preventing the push pawl from hindering the rotation of the ratchet during the shifting process.

[0018] A further solution is that a second elastic member is connected between the push rod and the bracket, and a third elastic member is connected between the pushing claw and the push rod.

[0019] As can be seen from the above, the second elastic member is used to assist the push rod to reset, and the third elastic member is used to assist the push claw to reset.

[0020] A further solution is that a window is provided on the housing, a guide groove is provided on the winding member, the bicycle shifter also includes an indicating member, the indicating member is hinged to the housing, the indicating member includes a driving end and an indicating end, a guide post is provided on the driving end, the guide post is slidably provided in the guide groove along an extension direction of the guide groove, the indicating end is arranged toward the window, and the winding member drives the indicating end to swing at the window.

[0021] As can be seen above, the guide groove drives the guide post of the indicator member to slide within the guide groove during the rotation of the winding member, thereby allowing the indicator end of the indicator member to display the gear position of the bicycle shifter. A window is provided on the housing, with the indicator end of the indicator member facing the window, allowing the rider to more directly determine the current gear position of the bicycle shifter from the window.

[0022] A further solution is that the guide groove is arranged in an arc shape, and a sixth elastic member is connected between the indicating member and the shell.

[0023] As can be seen above, the arc-shaped guide groove forms the trajectory of the driving end of the indicator member. This trajectory precisely controls the swing angle of the indicator member each time it indicates a gear position, and further ensures a more reliable linkage between the winding member and the indicator unit. The sixth elastic member assists in resetting the indicator member.

[0024] In order to achieve another object of the present invention, the present invention provides a bicycle, including a frame, a derailleur, a speed change cable and a bicycle shifter, wherein the derailleur is mounted on a rear fork of the frame or on a middle portion of the frame, a first end of the speed change cable is connected to the derailleur, and the bicycle shifter includes a pawl member, a fifth elastic member, a release rod and a push rod, the pawl member is movably connected to the bracket, the pawl member is located in the circumferential direction of the ratchet, and a positioning pawl and a release pawl are respectively provided at both ends of the pawl member, the positioning pawl and the release pawl are located on opposite sides of the ratchet, the positioning pawl is arranged toward the first tooth portion, and the release pawl is arranged toward the first tooth portion. The second tooth portion is provided, and the fifth elastic member is provided on the pawl member to provide it with a reset force. The release lever is hinged to the bracket, and the release lever can move the pawl member relative to the bracket, so that the positioning pawl is disengaged from the first tooth portion and the release pawl is engaged with the second tooth portion. When the release lever is released, under the action of the fifth elastic member, the positioning pawl is engaged with the next tooth of the first tooth portion and the release pawl is disengaged from the second tooth portion. The push rod is rotatably connected to the rotating shaft around the axis of the rotating shaft. A pushing claw is hinged on the push rod, and the pushing claw is set toward the second tooth portion. The push rod can rotate around the rotating shaft and drive the pushing claw to engage with the second tooth portion.

[0025] As can be seen from the above, through the structural design of the bicycle shifter, the positioning pawl and the release pawl are integrally formed into a pawl component, thereby ensuring the linkage between the positioning pawl and the release pawl, and avoiding gear shifting during the shifting process of the bicycle shifter. By setting the relative positions of the positioning pawl and the release pawl, the positioning pawl and the release pawl are avoided from being concentrated on one side of the ratchet, ensuring that the force on both sides of the ratchet is evenly distributed, thereby avoiding the need to set a holding plate to assist in fixing the ratchet and pawl component, simplifying the structure of the bicycle shifter, and reducing the manufacturing cost of the bicycle shifter, and reducing the production cost of the bicycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 2 is a structural diagram of a bicycle shifter according to an embodiment of the present invention.

[0027] Figure 2 FIG. 1 is a structural diagram of a bicycle shifter according to an embodiment of the present invention, with some components omitted. FIG.

[0028] Figure 3 FIG. 1 is a structural diagram of a bicycle shifter according to an embodiment of the present invention, with some components omitted. FIG.

[0029] Figure 4 FIG2 is a structural diagram showing the relative positions of a winding member and a ratchet wheel of a bicycle shifter according to an embodiment of the present invention.

[0030] Figure 5 FIG. 1 is an exploded view of a bicycle shifter according to an embodiment of the present invention with some components omitted. FIG.

[0031] Figure 6 FIG. 1 is a structural diagram of a bicycle shifter according to an embodiment of the present invention, with some components omitted. FIG.

[0032] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0034] The bicycle comprises a frame, a derailleur, a speed-changing cable and a bicycle shifter 100 . The derailleur is mounted on a rear fork of the frame or in the middle of the frame. A first end of the speed-changing cable is connected to the derailleur.

[0035] Reference Figures 1 to 3 Bicycle shifter 100 includes a housing 1, a winding member 2, a ratchet 3, a pawl member 4, a release lever 5, a push rod 6, and an indicator member 7. Housing 1 is mounted on a handlebar of a bicycle frame and comprises an upper housing and a lower housing, with a receiving cavity 11 defined between the upper and lower housings. A bracket 12 is fixedly mounted on the lower housing and positioned within receiving cavity 11. A rotating shaft 13 is disposed on bracket 12.

[0036] Combine Figure 4 The winding member 2 is mounted on the rotating shaft 13 and is rotatably connected to the rotating shaft 13 around the axis of the rotating shaft 13. The second end of the speed change cable 9 is connected to the winding member 2. The winding member 2 is provided with a wiring portion 21. The wiring portion 21 is used to connect with the speed change cable 9 and to wind or release the speed change cable 9 so that the speed change cable 9 can control the movement of the derailleur unit of the derailleur on the bicycle, thereby shifting the bicycle chain to engage with different sprockets, thereby achieving speed change operation of the bicycle.

[0037] The winding member 2 is also provided with a limit portion 22, and a limit slot 33 is provided in the middle of the ratchet 3. The ratchet 3 is fitted over the limit portion 22 of the winding member 2 via the limit slot 33, thereby achieving a fixed connection between the ratchet 3 and the winding member 2, ensuring that the ratchet 3 can rotate synchronously with the winding member 2. Furthermore, the ratchet 3 is circumferentially provided with a first tooth portion 31 and a second tooth portion 32, and a fourth elastic member 81 is connected between the winding member 2 and the bracket 12 to reset the winding member 2.

[0038] Reference Figure 5 , and combined with Figure 1 and Figure 2 The housing 1 is provided with a window 16 that displays the gear position indicated by the indicator member 7, allowing the rider to more intuitively understand the current gear position of the bicycle shifter 100. Specifically, the winding member 2 is further provided with a guide groove 23, preferably arc-shaped. The indicator member 7 is located within the accommodating cavity 11 of the housing 1 and is hingedly connected to the upper shell of the housing 1. The indicator member 7 includes a driving end 71 and an indicating end 72. The driving end 71 is provided with a guide post 711 that extends toward the winding member 2 and is located within the guide groove 23 of the winding member 2. The guide post 711 is slidably connected to the guide groove 23 along the extension direction of the guide groove 23. The indicating end 72 is arranged toward and extends to the window 16. The winding member 2 is used to drive the indicating member 7 to rotate relative to the upper shell, causing the indicating end 72 to swing within the window 16, thereby indicating the gear position. In addition, a sixth elastic member 86 is connected between the indicating member 7 and the upper shell of the shell 1 , and the sixth elastic member 86 is used to assist the indicating member 7 in resetting.

[0039] When the winding member 2 rotates, the rotating winding member 2 drives the indicator member 7 to rotate via the guide groove 23 and the guide post 711 on the driving end 71 of the indicator member 7. Specifically, the guide groove 23 drives the guide post 711 to slide within the guide groove 23 during the rotation of the winding member 2, thereby allowing the indicator member 7 to rotate in conjunction with the rotation of the winding member 2, allowing the indicator end 72 to indicate the gear position of the bicycle shifter 100. The design of the connection mechanism between the indicator member 7 and the winding member 2 makes the linkage between the winding member 2 and the indicator member 7 more reliable, and enables the indicator end 72 of the indicator member 7 to accurately indicate the current gear position of the bicycle shifter 100 based on the rotation amplitude of the winding member 2.

[0040] In addition, to prevent external dust and moisture from entering the interior of the housing 1 and to avoid damage to the winding member 2, ratchet 3, pawl member 4, etc., a transparent cover is provided at the window 16, and the transparent cover covers the entire window 16. Furthermore, a gear position indicator is provided on the transparent cover, so that the gear position indicated by the indicator end 72 can be more clearly identified, so that the rider can more intuitively and clearly read the current gear position information of the bicycle shifter 100.

[0041] Reference Figure 6 and Figure 7 , and combined with Figure 3 The pawl member 4 is slidably connected to the bracket 12 and is located in the circumferential direction of the ratchet wheel 3. Specifically, a first sliding groove 43 is provided at the first end of the pawl member 4, and a second sliding groove 44 is provided at the second end of the pawl member 4. The bracket 12 is provided with a first pin 14 and a second pin 15. The first pin 14 is located in and connected to the first sliding groove 43, and the second pin 15 is located in and connected to the second sliding groove 44.

[0042] The pawl member 4 includes a connecting portion and a positioning pawl 41 and a release pawl 42 disposed at either end of the connecting portion. The connecting portion of the pawl member 4 is arc-shaped and halfway around the outside of the ratchet 3. The positioning pawl 41 and the release pawl 42 are located on opposite sides of the ratchet 3 and face each other. Furthermore, the positioning pawl 41 faces the first tooth 31 of the ratchet 3, while the release pawl 42 faces the second tooth 32 of the ratchet 3. A fifth elastic member 82 is disposed between the bracket 12 and the pawl member 4 to assist in resetting the pawl member 4.

[0043] The positioning pawl 41, the release pawl 42 and the connecting portion are integrally formed, thereby ensuring the linkage between the positioning pawl 41 and the release pawl 42, and preventing the bicycle shifter 100 from shifting out of gear. By setting the relative positions of the positioning pawl 41 and the release pawl 42, the positioning pawl 41 and the release pawl 42 are prevented from being concentrated on one side of the ratchet, ensuring that the force on both sides of the ratchet 3 is evenly distributed, thereby avoiding the need to set a holding plate to assist in fixing the ratchet 3 and the pawl member 4, simplifying the structure of the bicycle shifter 100, and reducing the manufacturing cost of the bicycle shifter 100.

[0044] The release lever 5 is hingedly connected to the bracket 12 and is used to move the pawl member 4 to slide relative to the bracket 12, causing the positioning pawl 41 to engage with the first tooth portion 31 or the release pawl 42 to engage with the second tooth portion 32. The release lever 5 is provided with a push block 51, and the pawl member 4 is provided with a protrusion 45 that cooperates with the push block 51. The push block 51 and the protrusion 45 abut each other. The push block 51 on the release lever 5 and the protrusion 45 on the pawl member 4 improve the reliability of the release lever 5 in pushing the pawl member 4 to slide. The protrusion 45 guides the sliding of the pawl member 4, preventing the push block 51 from directly acting on the pawl member 4 and applying a force perpendicular to the second slot 44, thereby preventing the pawl member 4 from becoming stuck and unable to slide along the second slot 44. A first elastic member 83 is connected between the release lever 5 and the housing 1 to assist the release lever 5 in resetting.

[0045] In addition, when the pawl member 4 slides relative to the bracket 12, it can swing at a certain angle, so that the release pawl 42 can reliably engage and disengage with the second tooth portion 32; the positioning pawl 41 can reliably engage and disengage with the first tooth portion 31, and ensure that the ratchet 3 has sufficient rotation space when decelerating, thereby improving the reliability of deceleration. At the same time, it can also prevent the ratchet 3 from being disengaged or stuck during the deceleration process.

[0046] The push rod 6 is rotatably connected to the rotating shaft 13 about the axis of the rotating shaft 13. A push pawl 61 is hingedly connected to the push rod 6. The push pawl 61 is disposed toward the second tooth portion 32. The push rod 6 can rotate about the rotating shaft 13 and drive the push pawl 61 to engage with the second tooth portion 32. The bracket 12 is provided with a guide portion 121 at the push pawl 61, and the guide portion 121 is adjacent to the push pawl 61. The guide portion 121 is used to guide and limit the push pawl 61, preventing the push pawl 61 from engaging with the second tooth portion 32 of the ratchet 3 after resetting, thereby preventing the push pawl 61 from obstructing the rotation of the ratchet 3 during the shift down process. A second elastic member is connected between the push rod 6 and the bracket 12, and is used to assist the push rod 6 in resetting. A third elastic member is connected between the push pawl 61 and the push rod 6, and is used to assist the push pawl 61 in resetting.

[0047] The shifting process of the bicycle shifter 100 is as follows:

[0048] like Figure 2 and Figure 6As shown, when the bicycle shifter 100 needs to shift gears, the push rod 6 is moved, causing it to rotate in the direction X1 and accumulating energy in the second elastic member. Simultaneously, the push rod 6 drives the push pawl 61 to move, causing it to gradually disengage from the guide portion 121. Under the elastic potential energy of the third elastic member, the push pawl 61 turns toward the ratchet wheel and engages with the second tooth portion 32 of the ratchet wheel 3. As the push rod 6 pushes the ratchet wheel 3 to rotate about the rotation axis 13 in the direction X1, the winding member 2 rotates synchronously with the ratchet wheel 3, winding the shift cable 9 and accumulating energy in the fourth elastic member 81. As the ratchet wheel 3 rotates, the first tooth portion 31 of the ratchet wheel 3 pushes the pawl member 4 to slide relative to the bracket 12, causing the positioning pawl 41 to disengage from the first tooth portion 31 of the ratchet wheel 3 and accumulating energy in the fifth elastic member 82. When the ratchet 3 is pushed by the push rod 6, the positioning pawl 41 passes one tooth position of the first tooth portion 31. The pawl member 4 is reset due to the elastic potential energy of the fifth elastic member 82, causing the positioning pawl 41 to re-engage with the first tooth portion 31 of the ratchet 3, thereby completing the shifting operation of the bicycle shifter 100. At this time, the push rod 6 is released, and the elastic potential energy of the second elastic member resets the push rod 6, causing the pushing pawl 61 to re-engage with the guide portion 121, storing energy in the third elastic member and disengaging from the second tooth portion 32.

[0049] During a gear shifting operation of the bicycle shifter 100 , the winding member 2 rotates, thereby synchronously driving the indicating end 72 of the indicating member 7 to rotate in the direction X1 , causing the indicating end 72 of the indicating member 7 to swing relative to the window 16 and indicate the corresponding gear position. Simultaneously, the indicating member 7 stores energy in the sixth elastic member 86 .

[0050] When a shift down operation is required on the bicycle shifter 100, the release lever 5 is toggled, causing it to rotate in the direction X2. This causes the release lever 5 to push the pawl member 4 to slide relative to the bracket 12, thereby accumulating energy in the first elastic member 83. During the sliding process of the pawl member 4, the positioning pawl 41 first gradually moves away from the ratchet 3 and disengages from the first tooth portion 31 of the ratchet 3. Simultaneously, the release pawl 42 gradually moves toward the ratchet 3 and engages with the second tooth portion 32 of the ratchet 3. At this time, the fifth elastic member 82 accumulates energy.

[0051] When the positioning pawl 41 disengages from the first tooth portion 31 of the ratchet 3 and the release pawl 42 engages with the second tooth portion 3 of the ratchet 3, the winding member 2 and the ratchet 3 are reset under the elastic potential energy of the fourth elastic member 81. Due to the structural design and positional arrangement of the positioning pawl 41, the release pawl 42, and the ratchet 3, the ratchet 3 retracts one tooth position relative to the positioning pawl 41. When the release lever 5 is released, the release lever 5 is reset under the elastic potential energy of the first elastic member 83, and the pawl member 4 is reset under the elastic potential energy of the fifth elastic member 82. During the resetting process of the pawl member 4, the release pawl 42 gradually moves away from the ratchet 3 and disengages from the second tooth portion 32 of the ratchet 3. At the same time, the positioning pawl 41 gradually moves toward the ratchet 3 and engages with the first tooth portion 31 of the ratchet 3. At this time, the positioning pawl 41 engages with a new tooth position of the ratchet 3, thereby completing the downshifting operation of the bicycle shifter 100.

[0052] During a shifting operation of the bicycle shifter 100, the winding member 2 rotates, thereby synchronously driving the indicating member 7 to rotate in the direction X2, causing the indicating end 72 of the indicating member 7 to swing relative to the window 16 and indicate the corresponding gear position. Simultaneously, the indicating member 7 is reset under the elastic potential energy of the sixth elastic member 86.

[0053] In summary, the bicycle gear shifter provided by the present invention has the advantages of simple structure and reliable operation.

[0054] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Bicycle gear shifter, including a housing, wherein a bracket is fixedly mounted in the housing and a rotating shaft is provided on the bracket; a winding member rotatably connected to the rotating shaft around an axis of the rotating shaft, a fourth elastic member connected between the winding member and the bracket, the fourth elastic member being used to reset the winding member; A ratchet wheel, the ratchet wheel being fixedly sleeved on the winding member, and the ratchet wheel being provided with a first tooth portion and a second tooth portion in a circumferential direction; It is characterized in that The bicycle shifter also includes: a pawl member, the pawl member being movably connected to the bracket, the pawl member being located in the circumferential direction of the ratchet, the two ends of the pawl member being respectively provided with a positioning pawl and a release pawl, the positioning pawl and the release pawl being located on opposite sides of the ratchet, the positioning pawl being arranged toward the first tooth portion, and the release pawl being arranged toward the second tooth portion, a fifth elastic member being provided between the bracket and the pawl member, the fifth elastic member being used to assist the pawl member in resetting; a release lever, the release lever being capable of moving the pawl member relative to the bracket, the release lever being provided with a push block, the pawl member being provided with a protrusion, the push block being adjacent to the protrusion, and a first elastic member being connected between the release lever and the housing; A push rod, the push rod is rotatably connected to the rotating shaft around the axis of the rotating shaft, a push claw is hinged on the push rod, the push claw is set toward the second tooth portion, the push rod can rotate around the rotating shaft and drive the push claw to engage with the second tooth portion, the bracket is provided with a guide portion at the push claw, the guide portion is adjacent to the push claw, a second elastic member is connected between the push rod and the bracket, and a third elastic member is connected between the push claw and the push rod.

2. The bicycle shifter according to claim 1, wherein: The pawl component is arranged in an arc shape and half surrounds the outside of the ratchet. The positioning pawl and the releasing pawl are arranged opposite to each other.

3. The bicycle shifter according to claim 2, wherein: The first end of the pawl member is further provided with a first sliding groove, and the second end of the pawl member is further provided with a second sliding groove; The bracket is provided with a first pin shaft and a second pin shaft, and the first pin shaft is connected to the first sliding groove, and the second pin shaft is connected to the second sliding groove.

4. A bicycle, characterized in that The bicycle shifter comprises a frame, a derailleur, a shift cable, and the bicycle shifter according to any one of claims 1 to 3, wherein the derailleur is mounted on a rear fork of the frame or on a middle portion of the frame, a first end of the shift cable is connected to the derailleur, the housing is mounted on a handlebar of the frame, and a second end of the shift cable is fixedly connected to the winding member.

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