CN210391453U

CN210391453U - Brake lever and bicycle using same

Info

Publication number: CN210391453U
Application number: CN201921407036.6U
Authority: CN
Inventors: 晁志伟; 王一雄
Original assignee: Beijing Youbei Baiqi Technology Co Ltd
Current assignee: Beijing Youbei Baiqi Technology Co Ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-04-24
Anticipated expiration: 2029-08-27

Abstract

The utility model belongs to the technical field of the technique of bicycle and specifically relates to a bicycle of brake lever and use this brake lever is related to. The utility model provides a brake lever, including the protective housing, the fixed subassembly of the fixed protective housing of cooperation, a connecting piece and the manual brake subassembly for connecting hand brake cable, the manual brake subassembly includes that one end and protective housing rotate the main arm of being connected, the other end and the handle of main arm rotate to be connected, through applying the effort to the handle and drive the main arm and rotate, the main arm drives the direction motion of connecting piece toward taut hand brake cable through the driving medium when rotating, be equipped with vice support arm on hand, vice support arm both ends and protective housing, the handle rotates to be connected. The main arm is driven to rotate by applying acting force to the handle, and when the main arm rotates, the connecting piece is driven by the transmission piece to move in the direction of tensioning the hand brake cable to complete braking action. When the handle rotates to be close to the handlebar, the angle between the main arm and the auxiliary supporting arm is reduced, the force arm of the lever is increased, the required acting force is reduced, and the braking action can be kept by the force of the small hand of a child.

Description

Brake lever and bicycle using same

Technical Field

The utility model belongs to the technical field of the technique of bicycle and specifically relates to a bicycle of brake lever and use this brake lever is related to.

Background

The existing well-known child bicycle brake crank generally adopts an adult bicycle brake crank or a reduced version of the adult bicycle brake crank, and the child cannot normally use the brake crank due to the fact that the hand of the child is small and the child is in a normal starting position state; if the starting position of the brake crank is adjusted to the position which can be operated by the small hand of a child, the brake crank is short in stay wire stroke, and the requirement for a brake with a long stay wire stroke cannot be met.

For example, the utility model with the publication number of CN202609008U discloses a brake handle for children bicycle. Just support the hand (hold) through the bolt among this scheme, adjust the initial angle state of hand (hold) for the distance of hand (hold) and handlebar shortens after rotating certain initial angle, makes children use more comfortablely.

The above prior art solution has the following drawbacks: after the brake lever rotates by a certain initial angle, although the operation stroke is shortened, the maximum angle which can be rotated by a subsequent handle is reduced, so that the problem that the brake lever has a short stay wire stroke and cannot meet the requirement of a long stay wire stroke still cannot be solved.

SUMMERY OF THE UTILITY MODEL

One of the objects of the present invention is to provide a brake lever, which is advantageous in that it can achieve a sufficient pull-up stroke with a short operation stroke.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: the utility model provides a brake lever, includes fixed subassembly, the connecting piece and the manual brake subassembly that are used for connecting the hand brake cable of the fixed protective housing of protective housing, cooperation, the manual brake subassembly includes that one end and protective housing rotate the main arm of being connected, and the other end and the handle of main arm rotate to be connected, drive the main arm rotation through exerting the effort to the handle, and the main arm drives the direction motion of connecting piece toward taut hand brake cable through the driving medium when rotating, be equipped with vice support arm on hand, vice support arm both ends are rotated with protective housing, handle and are connected.

Through adopting above-mentioned technical scheme, drive the main arm and rotate through applying the effort to the handle, when the main arm rotates, drive the connecting piece through the driving medium and accomplish the braking action to the direction motion of taut hand brake cable. Due to the fact that the main arm portion and the handle portion are divided, only the main arm portion is much shorter than the force arm of the brake handle in the prior art, and therefore under the same operation stroke, the brake handle has a larger rotation angle compared with the brake handle in the prior art, and the larger the rotation angle is, the longer the cable pulling stroke is. The auxiliary supporting arm is rotatably connected with the protective shell and the handle to assist in supporting the handle, so that the handle moves along a determined path. When the handle exerts the effort to the handle, the handle is injectd the rotation path and is removed along main arm and vice support arm, and the main arm receives the rotation of handle effort and converts the rotation into rectilinear motion through the driving medium simultaneously, and the main arm cooperates with vice support arm when rotating and makes the handle keep the state parallel with the handle, need not reserve the rotation space of traditional brake lever, realizes making things convenient for children's operation's short distance to hold the distance, and can reach sufficient line drawing stroke with shorter operation stroke. When the handle rotates to be close to the handlebar, the angle between the main arm and the auxiliary supporting arm is reduced, the force arm of the lever is increased, the required acting force is reduced, and the braking action can be kept by the force of the small hand of a child.

The utility model discloses further set up to: the transmission part comprises a strip-shaped tooth formed on the side surface of the connecting part and an arc-shaped rack positioned on the main arm, the strip-shaped tooth is meshed with the arc-shaped rack, and the circle center of the arc-shaped rack is superposed with the rotation center lines of the main arm and the protective shell.

By adopting the technical scheme, the arc-shaped rack is matched with the strip-shaped teeth, so that when the main arm rotates, the strip-shaped teeth are driven to move by the arc-shaped rack. Because the circle center of the arc-shaped rack coincides with the rotating center lines of the main arm and the protective shell, the distance between the arc-shaped rack and the rotating center cannot be changed in the rotating process of the main arm, and therefore the arc-shaped rack and the rotating center can be meshed together all the time.

The utility model discloses further set up to: the transmission part comprises a stress block formed on the side surface of the connecting part and a force application block moving along with the main arm, and the force application block is abutted against the stress block in the rotation process of the main arm.

By adopting the technical scheme, in the process that the main arm rotates through the matching of the force application block and the stress block, the force application block applies acting force to the stress block, and the stress block and the connecting piece move together in the direction of tensioning the brake cable.

The utility model discloses further set up to: the rotation center lines of the main arm, the protective shell and the handle, and the rotation center lines of the auxiliary supporting arm, the protective shell and the handle are all parallel to each other, and the four rotation center lines are respectively positioned on four points of a parallelogram; the handle comprises a hand-holding section, and the hand-holding section is parallel to the handlebar in the rotating process of the main arm and the auxiliary supporting arm.

Through adopting above-mentioned technical scheme, through setting up four rotation connection points on parallelogram's four angles for the handle remains at original orientation state throughout at the pivoted in-process. Therefore, the hand-holding section is always parallel to the handlebar in the whole rotating process, and the hand is more comfortable when acting force is applied to the handlebar.

The utility model discloses further set up to: the main arm is connected with the protective housing through the auxiliary supporting arm, the protective housing is connected with the main arm through the auxiliary supporting arm, and the auxiliary supporting arm is connected with the protective housing through the auxiliary supporting arm.

Through adopting above-mentioned technical scheme, the tie point setting through with vice support arm and protective housing is comparing the main arm and the position that the protective housing tie point is more close from the handlebar for the in-process of the rotatory brake of operation main arm, vice support arm and protective housing tie point can not become the hindrance when main arm is rotatory. The main arm can be rotated by operating the handle until the handle stops when abutting against the handlebar, so that the main arm can have the rotation angle as large as possible.

The utility model discloses further set up to: the protective shell is provided with a square hole with two ends penetrating through, the connecting piece comprises a cylinder body penetrating through the square hole, and one side of the cylinder body facing the side wall of the square hole is provided with a circular groove with the diameter slightly larger than that of the hammer head of the hand brake cable; set up circular slot one side on the cylinder and set up the first side groove that is linked together with the circular slot, first side groove is kept away from circular slot one side and is run through the cylinder side, and the cylinder is equipped with the second side groove towards one side of square hole port, and the second side groove extends to and runs through the same side position of cylinder from the cylinder middle part.

Through adopting above-mentioned technical scheme, restrict the connecting piece through square hole cooperation cylinder and only can follow the motion of square hole direction. Turn right from a left side with the tup of hand brake line and pass the square hole, wear out the back with tup embedding circular slot in, the second side inslot is gone into to final card after the hand brake line passes through first side groove, makes the tup of hand brake line can not separate with the connecting piece. The connecting piece can be stably driven to tighten the brake when moving.

The utility model discloses further set up to: all the shaping has the guide way along square hole length direction on two relative lateral walls of square hole, and the protective housing is run through with the one end in twice guide way, the connecting piece still including the line of acting as go-between ratch that is located the cylinder side, the side of the ratch of acting as go-between all the shaping has the guide block of card income guide way.

Through adopting above-mentioned technical scheme, play the guide effect through guide block and guide way cooperation. Meanwhile, only one side of the guide groove penetrates through the protective shell, so that the guide block can only penetrate into the guide groove from one side and cannot penetrate out of the guide groove from the other side, and the guide block and the connecting piece can be matched to play a limiting role.

The utility model discloses further set up to: the internal thread hole has been seted up to the one end of protective housing, and internal thread hole threaded connection has the brake cable locking cap, and the brake cable locking cap includes the double-screw bolt with internal thread hole screw-thread fit and connects in the operation post that double-screw bolt left end diameter is greater than the double-screw bolt, and the terminal surface shaping of operation post has the third recess that extends to in the double-screw bolt, and the side shaping of operation post and double-screw bolt has the groove of dodging that is linked together with the third recess.

Through adopting above-mentioned technical scheme, through the line cap butt of manual brake line in the third recess, the steel wire sinle silk passes the brake line locking cap through dodging the groove, can adjust the position of the line cap of manual brake line in order to adjust the manual brake line elasticity through the position of adjusting the yarn locking cap.

The utility model discloses further set up to: a first groove with an arc-shaped bottom surface is formed on the lower side of the protective shell when the bottom surface of the protective shell is observed from the longitudinal section, the diameter of the first groove is equal to that of a handlebar, and the arc length of the section of the bottom of the groove is less than 180 degrees; the fixing assembly comprises a lower connecting shell positioned below the protective shell, a second groove with the same diameter as the first groove is formed in the upper side of the lower connecting shell, the bottom surface of the second groove is arc-shaped when viewed from the longitudinal section, and the radian is smaller than 180 degrees; first connecting bulges are formed at the front side and the rear side of the first groove on the protective shell, first threaded holes which are communicated in the up-down direction are formed in each first connecting bulge, second connecting bulges are formed at the front side and the rear side of the second groove on the lower connecting shell, through holes which are communicated in the up-down direction are formed in each second connecting bulge, and bolts/screws are connected with the first threaded holes in a threaded mode after penetrating through the through holes.

Through adopting above-mentioned technical scheme, pass through the through-hole through bolt/screw and first screw hole threaded connection and make protective housing and lower connecting shell fixed together to make the protective housing extrude the handlebar through first recess and the cooperation of second recess, make the protective housing fixed on the handlebar.

Another object of the utility model is to provide a bicycle of using above-mentioned brake lever.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

through adopting above-mentioned technical scheme, can realize reaching the purpose of sufficient stay wire stroke with short operating stroke under the circumstances of exerting less power when using above-mentioned brake lever, and can strain the brake cable with less power, be fit for children and use.

To sum up, the utility model discloses a beneficial technological effect does:

1. when the handle applies acting force to the handle, the handle moves along a determined path to smoothly drive the main arm to rotate, and the displacement distance of the acting force applied by the handle at the rotating connection part of the handle and the main arm is shorter than that of the handle in the prior art when a hand brake is held by a hand, so that the wire pulling stroke can be enough by a short operation stroke on the premise of the same force or labor saving, and the wire pulling stroke is favorable for children to use;

2. when the brake lever rotates, the angle between the main arm and the supporting arm is reduced along with the rotation of the handle to be close to the handlebar, the force arm of the lever is increased, the required acting force is reduced along with the reduction of the angle, and the brake action can be kept by the force of a small hand of a child;

3. through rotating four tie points and setting on four angles of parallelogram for the handle remains at original orientation state throughout at the pivoted in-process, consequently can make the section of holding rotate the in-process throughout with the handlebar parallel, and is more comfortable when the hand applys the effort to the handle.

Drawings

FIG. 1 is a schematic structural diagram of the first embodiment;

FIG. 2 is a schematic cross-sectional view of the first embodiment;

FIG. 3 is a schematic view of a portion of the structure of the coupling and handbrake assembly in accordance with one embodiment;

FIG. 4 is a schematic view of the structure of the connecting member and the main driving arm in the second embodiment.

Reference numerals: 1. a protective shell; 2. a fixing assembly; 3. a connecting member; 4. a hand brake assembly; 5. a first groove; 6. a first connecting projection; 7. a first threaded hole; 8. a lower connecting shell; 9. a second groove; 10. a second connecting projection; 11. a through hole; 12. a square hole; 13. a guide groove; 14. a cylinder; 15. a circular groove; 16. a first side groove; 17. a second side groove; 18. a wire pulling toothed bar; 19. a guide block; 20. an internally threaded bore; 21. a brake cable fixing cap; 22. a stud; 23. an operating column; 24. a third groove; 25. an avoidance groove; 26. a bar-shaped tooth; 27. a main drive arm; 28. a handle; 29. a secondary support arm; 30. a main arm; 31. an extension arm; 32. a circular arc-shaped rack; 33. mounting grooves; 34. a stress block; 35. and a force application block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The first embodiment is as follows:

as shown in fig. 1 and 2, a brake lever comprises a protective shell 1, a fixing component 2 for fixing the protective shell 1 on a handlebar in a matching manner, a connecting piece 3 for connecting with a hand brake cable, and a hand brake component 4 for driving the connecting piece 3 to move in the direction of tensioning the hand brake cable. The directions of the bicycle brake lever in the whole text are defined as up, down, left and right in the drawing 1, the front side of the drawing is the front side, and the back side of the drawing is the back side.

As shown in fig. 1, a first groove 5 having an arc-shaped bottom surface when viewed from a longitudinal section is formed at a lower side of the protective case 1, a diameter of the first groove 5 is equal to a diameter of a handle bar, and an arc length of a section of a groove bottom is less than 180 degrees. The axis of first recess 5 is followed left right direction, and the equal shaping in the 5 front and back sides positions of first recess has first connection arch 6 on protective housing 1, all sets up the first screw hole 7 that the direction link up from top to bottom on every first connection arch 6.

As shown in fig. 1, the fixing member 2 includes a lower coupling case 8 positioned below the protective case 1, and a second groove 9 having the same diameter as the first groove 5 is formed at an upper side of the lower coupling case 8. The bottom surface of the second groove 9 is arc-shaped when viewed from the longitudinal section, and the radian is less than 180 degrees. The axis direction of second recess 9 is the same towards left right direction, and it has second connection arch 10 to lie in the equal shaping of second recess 9 front and back side position on the lower connecting shell 8, all sets up the through-hole 11 that link up along upper and lower direction on every second connection arch 10. The protective shell 1 and the lower connecting shell 8 are arranged on two sides of the handlebar, and the bolt/screw penetrates through the through hole 11 and then is in threaded connection with the first threaded hole 7 to fix the protective shell 1 on the handlebar.

As shown in fig. 2, a square hole 12 is formed in the upper end portion of the protective shell 1 along the left-right direction, both ends of the square hole 12 penetrate through the protective shell 1, and fillets are formed at four corners of the inner wall of the square hole 12. All the shaping has the guide way 13 along 12 length direction in square hole on the both sides lateral wall around 12, and protective housing 1 is run through on the right side in guide way 13, and the left end of guide way 13 leaves the interval with the left end of protective housing 1. The right side of the protective shell 1 is provided with an installation groove 33 which is communicated with the square hole 12 at the position below the square hole 12, and the width of the installation groove 33 is smaller than that of the square hole 12.

As shown in fig. 2 and 3, the connecting member 3 includes a column 14 having a cross-sectional shape matching the cross-sectional shape of the square hole 12, and a circular groove 15 having a diameter slightly larger than the diameter of the hammer head of the hand brake cable is formed in the front side of the column 14. A first side groove 16 is formed on the front side of the column body 14 near the lower end edge, and the lower end of the first side groove 16 penetrates through the lower side wall of the column body 14. The middle part of the left side of the column body 14 is formed with a second side groove 17, the second side groove 17 extends from the middle part of the left side of the column body 14 to a position penetrating through the lower side, and the second side groove 17 is communicated with the circular groove 15 and the first side groove 16. The connecting piece 3 also comprises a stay wire toothed bar 18 formed on the right side surface of the column body 14, and guide blocks 19 clamped in the guide grooves 13 are formed on the front side and the rear side of the stay wire toothed bar 18. The guide block 19 is matched with the guide groove 13, so that the connecting piece 3 can only slide along the direction of the square hole 12.

As shown in fig. 2 and 3, the hammer head of the hand brake cable passes through the square hole 12 from left to right, the hammer head is embedded into the circular groove 15 after passing through the square hole, and the hand brake cable passes through the first side groove 16 and is finally clamped into the second side groove 17. Then, the connector 3 is inserted into the square hole 12 and slid along the square hole 12 until the guide block 19 abuts against the left end surface of the guide groove 13.

As shown in fig. 2 and 3, an internal threaded hole 20 is formed at the square hole 12 at the left end of the protective case 1, and a brake cable fixing cap 21 is screwed through the internal threaded hole 20. The brake cable fixing cap 21 comprises a stud 22 which is in threaded fit with the internally threaded hole 20, and an operating column 23 which is connected to the left end of the stud 22 and has a larger diameter than the stud 22. A third groove 24 extending into the stud 22 is formed on the left end surface of the operating column 23, and an avoiding groove 25 communicated with the third groove 24 is formed on the side surfaces of the operating column 23 and the stud 22. The line cap butt of hand brake cable is in third recess 24, and the steel wire sinle silk passes brake cable fixing cap 21 through dodging groove 25.

As shown in fig. 2 and 3, the handbrake assembly 4 includes a bar tooth 26 formed on the lower side of the wire rack bar 18, a main transmission arm 27 engaged with the bar tooth 26, a handle 28 connected to the main transmission arm 27, and a secondary support arm 29 for operating the main transmission arm 27 to rotate by the auxiliary handle 28. The main transmission arm 27 includes a main arm 30 rotatably connected to the protective case 1 in a mounting groove 33, an extension arm 31 integrally formed at a side surface of the main arm 30, and a circular arc-shaped rack 32 connected between the extension arm 31 and the main arm 30, and the rotation center lines of the main arm 30 and the protective case 1 are along the front-rear direction. The tooth surface of the circular arc-shaped rack 32 faces the strip-shaped teeth 26 and is meshed with the strip-shaped teeth 26, the circle center of the circular arc-shaped rack 32 is overlapped with the rotation center line of the main arm 30 and the protective shell 1, and the circular arc-shaped rack 32 and the strip-shaped teeth 26 are used as transmission parts at the moment. The end of the main arm 30 remote from the protective case 1 is pivotally connected to the left end of the handle 28. The auxiliary supporting arm 29 is equal in length to the main arm 30, the left end of the auxiliary supporting arm 29 is rotatably connected with the protective shell 1, the connection point is located at the lower right side of the connection point of the main arm 30 and the protective shell 1, and the right end of the auxiliary supporting arm 29 is rotatably connected with the handle 28. The rotation center lines of the main arm 30 and the protective shell 1 and the handle 28, and the rotation center lines of the auxiliary support arm 29 and the protective shell 1 and the handle 28 are all parallel to each other, and the four rotation center lines are respectively located on four points of a parallelogram. The part of the handle 28 on the right side of the hinge point is a hand grip, and the hand grip is always in the left-right direction in the process of rotating the main arm 30 and the auxiliary support arm 29.

The specific using process is as follows:

when downward acting force is applied to the handle 28, the main transmission arm 27 and the auxiliary supporting arm 29 both rotate clockwise, and in the process that the main transmission arm 27 rotates along the pointer, the circular arc-shaped rack 32 drives the wire pulling toothed rod 18 meshed with the circular arc-shaped rack 26 to move rightwards through the strip-shaped teeth 26, so that the hammer head of the hand brake cable moves rightwards together, and the hand brake cable tensions the brake.

Example two:

as shown in fig. 4, a brake lever is different from the first embodiment only in that a force receiving block 34 is formed on the lower end surface of the pull-wire rack 18, the main transmission arm 27 includes a main arm 30 and an extension arm 31 which are integrally formed, and a force applying block 35 is formed on the extension arm 31, and the force applying block 35 abuts against the left side surface of the force receiving block 34.

Example three:

a bicycle comprising the brake lever of embodiment one or embodiment two.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a brake lever, includes fixed subassembly (2) of protective housing (1), the fixed protective housing of cooperation (1), is used for connecting piece (3) and manual brake subassembly (4) of hand brake cable, characterized by: hand brake subassembly (4) include that one end and protective housing (1) rotate main arm (30) of being connected, and the other end and handle (28) of main arm (30) rotate to be connected, drive main arm (30) and rotate through applying effort to handle (28), and main arm (30) drive connecting piece (3) through the driving medium when rotating and move toward the direction of taut hand brake cable, be equipped with vice support arm (29) on handle (28), vice support arm (29) both ends rotate with protective housing (1), handle (28) and are connected.

2. The brake lever according to claim 1, wherein: the transmission piece comprises strip-shaped teeth (26) formed on the side face of the connecting piece (3) and a circular arc-shaped rack (32) located on the main arm (30), the strip-shaped teeth (26) are meshed with the circular arc-shaped rack (32), and the circle center of the circular arc-shaped rack (32) is superposed with the rotating center lines of the main arm (30) and the protective shell (1).

3. The brake lever according to claim 1, wherein: the transmission piece comprises a stress block (34) formed on the side surface of the connecting piece (3) and a force application block (35) moving along with the main arm (30), and the force application block (35) is abutted against the stress block (34) in the rotating process of the main arm (30).

4. A brake lever according to any of claims 1 to 3, wherein: the main arm (30) is parallel to the rotation center lines of the protective shell (1) and the handle (28), and the auxiliary supporting arm (29) is parallel to the rotation center lines of the protective shell (1) and the handle (28), and the four rotation center lines are respectively positioned on four points of a parallelogram; the handle (28) comprises a hand-holding section which is parallel to the handlebar in the rotating process of the main arm (30) and the auxiliary supporting arm (29).

5. The brake lever according to claim 4, wherein: the connecting point of the auxiliary supporting arm (29) and the protective shell (1) is located in the rotating direction of the main arm (30) when the connecting point of the main arm (30) and the protective shell (1) faces the brake, and compared with the connecting point of the auxiliary supporting arm (29) and the protective shell (1), the connecting point of the main arm (30) and the protective shell (1) is closer to a handlebar.

6. A brake lever according to any of claims 1 to 3, wherein: a square hole (12) with two ends penetrating is formed in the protective shell (1), the connecting piece (3) comprises a cylinder (14) penetrating in the square hole (12), and a circular groove (15) with the diameter slightly larger than that of a hammer head of the hand brake cable is formed in one side, facing the side wall of the square hole (12), of the cylinder (14); the cylinder (14) is provided with a circular groove (15), one side of the circular groove (15) is provided with a first side groove (16) communicated with the circular groove (15), one side of the first side groove (16) far away from the circular groove (15) penetrates through the side face of the cylinder (14), one side of the cylinder (14) facing the port of the square hole (12) is provided with a second side groove (17), and the second side groove (17) extends to the position of the same side face of the cylinder (14) from the middle of the cylinder (14).

7. The brake lever according to claim 6, wherein: all the shaping has guide way (13) along square hole (12) length direction on two relative lateral walls of square hole (12), and protective housing (1) is run through with the end in twice guide way (13), connecting piece (3) are still including being located cylinder (14) side stay wire ratch (18), and the side of stay wire ratch (18) all the shaping has guide block (19) of card income guide way (13).

8. The brake lever according to claim 7, wherein: internal thread hole (20) have been seted up to the one end of protective housing (1), internal thread hole (20) threaded connection has brake cable locking cap (21), brake cable locking cap (21) include with internal thread hole (20) screw-thread fit's double-screw bolt (22) and connect in operation post (23) that double-screw bolt (22) left end diameter is greater than double-screw bolt (22), the terminal surface shaping of operation post (23) has third recess (24) that extend to in double-screw bolt (22), the side shaping of operation post (23) and double-screw bolt (22) has dodges groove (25) that are linked together with third recess (24).

9. The brake lever according to claim 1, wherein: a first groove (5) with an arc-shaped bottom surface is formed in the lower side of the protective shell (1) when the bottom surface of the protective shell is observed from a longitudinal section, the diameter of the first groove (5) is equal to that of a handlebar, and the arc length of the section of the bottom of the groove is less than 180 degrees; the fixing assembly (2) comprises a lower connecting shell (8) positioned below the protective shell (1), a second groove (9) with the same diameter as that of the first groove (5) is formed in the upper side of the lower connecting shell (8), the bottom surface of the second groove (9) is arc when viewed from the longitudinal section, and the radian is smaller than 180 degrees; all shaping in first recess (5) front and back side position has first connection arch (6) on protective housing (1), first screw hole (7) that the direction link up about all seting up on every first connection arch (6), it has second connection arch (10) to lie in second recess (9) front and back side position and all shaping on lower connection shell (8), all set up on every second connection arch (10) along through-hole (11) that the direction link up from top to bottom, bolt/screw pass behind through-hole (11) with first screw hole (7) threaded connection.

10. A bicycle is characterized in that: comprising a brake lever according to claim 1.