TW202007586A - Bicycle brake handle - Google Patents

Abstract

A bicycle brake handle is adapted to be mounted on a bicycle handlebar. The bicycle brake handle includes a casing, a hydraulic cylinder, a brake bar and an assembling member. The casing surrounds an accommodating space. The hydraulic cylinder is disposed in the accommodating space, and has a hydraulic chamber, an oil storage chamber and an injecting channel. The oil storage chamber is located between the hydraulic chamber and the injecting channel. The brake bar has a pivot, and the pivot is pivoted to the hydraulic cylinder. The assembling member is disposed on the hydraulic cylinder and configured to be mounted on the bicycle handlebar. The hydraulic chamber, the oil storage chamber and the injecting channel are located between the pivot of the brake bar and the assembling member, and the hydraulic chamber is closer to the pivot of the brake bar than the oil storage chamber and the injecting channel.

Description

Brake handle for bicycle

The invention relates to a bicycle brake handle, in particular to a bicycle brake handle with a hydraulic cylinder.

With the prevalence of sports in society, most people currently use bicycles to achieve sports and leisure purposes, thus creating a booming bicycle market. In order to attract consumers to buy high-end self-model cars suitable for mountaineering or racing, or low-end bicycles for general public leisure and entertainment, manufacturers focus on improving the performance and equipment of bicycles and optimizing the appearance of bicycles.

For the high-end bicycles currently produced on the market, most of the high-end bicycles use hydraulic brake systems and electronic shifting systems at the same time, so the brake handles of bicycles are usually equipped with hydraulic cylinders, batteries, circuit boards and other components. Generally speaking, the arrangement of the hydraulic chamber and the oil storage chamber in the hydraulic cylinder of the brake handle of the bicycle is usually arranged side by side or vertically, but the hydraulic chamber and the oil storage are arranged side by side or vertically The chambers will increase the width or height of the overall hydraulic cylinder, and the width and height of the brake handles will increase accordingly, thus reducing the aesthetics of the bicycle.

On the other hand, the housing of the brake handle of a bicycle is usually a two-half shell, and both of the two half-shells are provided with grooves for accommodating batteries at the same time. However, in the process of assembling the battery into the brake handle housing of the bicycle, the grooves of the two half shells need to be aligned to allow the grooves of the two half shells to accommodate the battery at the same time, resulting in time for assembling the brake handles of the bicycle Increase, which in turn reduces the assembly efficiency of the brake handle of the bicycle. Therefore, how to reduce the width or height of the hydraulic cylinder and increase the assembly efficiency of the brake handle of the bicycle is one of the problems that the industrial R&D personnel urgently need to solve.

The present invention is to provide a brake handle of a bicycle, to solve the problem that the hydraulic chambers and oil storage chambers arranged side-by-side or vertically in the prior art will increase the width and height of the brake handle, and the experience of the groove that houses the two half shells of the battery The problem of reducing the assembly efficiency of the brake handle.

The brake handle of a bicycle disclosed in an embodiment of the present invention is suitable for being assembled to a bicycle grip. The brake handle of the bicycle includes a housing, a hydraulic cylinder, a brake lever and an assembly element. The housing surrounds a containing space. The hydraulic cylinder is arranged in the accommodating space, and has an hydraulic chamber, an oil storage chamber and an oil injection channel. The oil storage chamber is located between the oil pressure chamber and the oil injection channel. The brake lever has a pivot shaft, and the pivot shaft is pivotally arranged on the hydraulic cylinder. The assembling element is arranged on the hydraulic cylinder and used to be installed on the grip of the rider. Wherein, the oil pressure chamber, the oil storage chamber and the oil injection channel are located between the pivot shaft of the brake lever and the assembly element, and the oil pressure chamber is adjacent to the pivot axis of the brake lever compared to the oil storage chamber and the oil injection channel.

A brake handle of a bicycle disclosed in another embodiment of the present invention includes a housing, a hydraulic cylinder, a brake lever, and a signal transmission module. The shell includes a first half shell and a second half shell assembled together. The first half shell has a first assembly edge and a first accommodating groove, and the second half shell has a second assembly edge. The first assembly edge is attached to the second assembly edge, and the first half shell and the second half shell together surround a receiving space. A bonding surface is formed at the bonding position of the first assembly edge and the second assembly edge, and the first accommodating groove body extends toward the second half shell and protrudes out of the bonding surface. The hydraulic cylinder is arranged in the accommodating space, and the brake lever is pivotally arranged on the hydraulic cylinder. The signal transmission module includes a battery, and the battery is disposed in the first accommodating groove.

A brake handle of a bicycle disclosed in yet another embodiment of the present invention is suitable for assembling a bicycle handlebar. The brake handle of the bicycle includes a shell, a hydraulic cylinder, a brake lever, a piston assembly and an assembly element. The housing surrounds a containing space. The hydraulic cylinder is arranged in the accommodating space. The hydraulic cylinder body has an hydraulic chamber and an oil outlet, and the oil outlet is located in the hydraulic chamber. The brake lever has a pivot shaft and a drive shaft, and the pivot shaft is pivotally arranged on the hydraulic cylinder. The piston assembly includes a connecting rod and a piston. The opposite ends of the connecting rod are respectively connected to the drive shaft and the piston of the brake lever, the piston is slidably disposed in the hydraulic chamber, and the oil outlet is located between the drive shaft and the piston of the brake lever. The assembling element is arranged on the hydraulic cylinder body and is used for being installed on a rider grip.

According to the brake handle of the bicycle according to the above embodiment, since the hydraulic chamber, the oil storage chamber and the oil injection passage are sequentially arranged from the side of the hydraulic cylinder adjacent to the pivot shaft to the side of the hydraulic cylinder adjacent to the assembled component It is arranged in front and back, so the height and width of the hydraulic cylinder body are more reduced than that of the hydraulic chamber and the oil storage chamber are arranged side by side or vertically, so the brake handle of the overall bicycle is shortened Height and width, thus enhancing the aesthetic appearance of the bicycle.

In addition, since the first accommodating groove of the first half shell protrudes from the fitting surface between the first and second shells and has a sufficient length, the battery is inserted into the first accommodating groove After that, the first accommodating groove body can provide the function of carrying the battery alone, so it can be used for carrying the battery together with the first accommodating groove body without using another accommodating groove body in the second half shell. In this way, it is possible to avoid the extra time spent in aligning the accommodating grooves of the two half shells during the assembly process, so the assembly efficiency of the brake handle of the bicycle is improved.

Please refer to Figure 1 to Figure 2. FIG. 1 is a schematic perspective view of a bicycle handle according to a first embodiment of the present invention mounted on a handlebar of a bicycle. FIG. 2 is an exploded schematic view of the brake handle of the bicycle of FIG. 1.

The brake handle 1 of the bicycle of this embodiment is, for example, the brake handle on the right side of the bicycle. The brake handle 1 of the bicycle includes a housing 10, a bush 20, a brake lever 30, a hydraulic cylinder 40, an assembly element 50, a piston assembly 60, a signal transmission module 70 and a signal control module 80.

The casing 10 includes a first half-shell 11 and a second half-shell 12 assembled together. The first half-shell 11 has a first assembly edge 111 and the second half-shell 12 has a second assembly edge 121. The first assembly edge 111 is attached to the second assembly edge 121, and the first half shell 11 and the second half shell 12 together surround an accommodating space 13 (please refer to FIG. 3 first) and a face facing the accommodating space 13 The inner wall surface 14 (please refer to FIG. 4 first). The material of the bush 20 is, for example, plastic, and the bush 20 is sleeved on the casing 10.

Please refer to Figure 2 and Figure 3 together. 3 is a schematic cross-sectional view of the brake handle of the bicycle of FIG. 1.

The hydraulic cylinder 40 is disposed in the accommodating space 13. The brake lever 30 has a pivot shaft 31 pivoted on the hydraulic cylinder 40. The assembling element 50 is disposed on the hydraulic cylinder 40, and the assembling element 50 and the brake lever 30 are located on opposite sides of the hydraulic cylinder 40, respectively. In this embodiment, the assembling element 50 is, for example, a clip, which is used to be mounted on a handlebar 2 of a bicycle.

The hydraulic cylinder 40 has a hydraulic chamber 41, an oil storage chamber 42 and an oil injection passage 43 that communicate with each other. The oil storage chamber 42 is located between the oil pressure chamber 41 and the oil injection passage 43, and the oil pressure chamber 41, the oil storage chamber 42 and the oil injection passage 43 of the oil cylinder 40 are located at the pivot shaft 31 of the brake lever 30 and assembled Element 50. Compared with the oil storage chamber 42 and the oil injection passage 43, the oil pressure chamber 41 is adjacent to the pivot shaft 31 of the brake lever 30, and a central axis P penetrating the oil injection passage 43 is kept at a distance from the oil storage chamber 42. That is, the hydraulic chamber 41, the oil storage chamber 42 and the oil injection passage 43 are sequentially arranged from the side of the hydraulic cylinder 40 adjacent to the pivot shaft 31 to the side of the hydraulic cylinder 40 adjacent to the assembly element 50 , And the oil injection passage 43 is located on the side of the oil storage chamber 42 instead of the top of the oil storage chamber 42.

In this embodiment, the hydraulic cylinder 40 also has a port 45 and a valve plug 46, and the brake handle 30 also has a drive shaft 33. The port 45 communicates with the hydraulic chamber 41, and the valve plug 46 is installed in the port 45. The piston assembly 60 includes a connecting rod 61, a piston 62 and an elastic return member 63. The piston 62 is slidably disposed in the hydraulic chamber 41, and the elastic return member 63 has a fixed end 631 and a movable end 632 opposite to each other. The fixed end 631 is fixed to the valve plug 46, and the movable end 632 abuts the piston 62. The connecting rod 61 is provided with an elastic reset member 63 and a valve plug 46, and two opposite ends of the connecting rod 61 are connected to the driving shaft 33 of the brake lever 30 and the piston 62, respectively. In addition, the hydraulic cylinder 40 further has an oil outlet 44. The oil outlet 44 is located in the oil pressure chamber 41, and the oil outlet 44 is located between the drive shaft 32 of the brake lever 30 and the piston 62. The elastic return member 63 is used The force applied to the piston 62 moving away from the oil outlet 44 is applied. In this embodiment, the piston assembly 60 is, for example, a pull-type supercharging structure. In detail, when the user presses the brake lever 30, the brake lever 30 will pull the piston 62 through the connecting rod 61, so that the piston 62 moves toward the oil outlet 44, so the hydraulic oil in the hydraulic chamber 41 is blocked by the piston 62 pushes and extrudes from the oil outlet 44. Then, the hydraulic oil squeezed out from the oil outlet 44 flows to the brake caliper (not shown) of the bicycle through the pipeline, and the brake caliper brakes.

Please refer to Figure 2, Figure 3 and Figure 4 together. 4 is another schematic cross-sectional view of the brake handle of the bicycle of FIG. 1.

The first half-shell 11 further has a first accommodating groove 112 and a second accommodating groove 113, and a bonding surface S is formed at the joint of the first assembly edge 111 and the second assembly edge 121. The first accommodating groove 112 and the second accommodating groove 113 are located between the inner wall surface 14 and the hydraulic cylinder 40, and the first accommodating groove 112 extends toward the second half shell 12 and protrudes out of the fit Face S. In detail, one side of the brake lever 30 away from the pivot shaft 31 has an end edge 32, the first accommodating groove 112 and the second accommodating groove 113 are respectively located on two adjacent sides of the oil storage chamber 42, and the first The accommodating groove 112 is adjacent to the end edge 32 of the brake lever 30 compared to the oil storage chamber 42. In other words, the first accommodating tank 112 is located below the oil storage chamber 42, and the second accommodating tank 113 is located on the side of the oil storage chamber 42. In this embodiment, the first accommodating groove 112 and the second accommodating groove 113 each have an accommodating groove 1121, 1131.

The signal transmission module 70 includes a battery 71, a circuit board 72 and an antenna 73. The battery 71 is electrically connected to the circuit board 72, and the antenna 73 is disposed on the circuit board 72. The battery 71 is disposed in the accommodating groove 1121 of the first accommodating tank 112 under the oil storage chamber 42, and the circuit board 72 is disposed in the accommodating groove 1131 of the second accommodating tank 113 in the oil storage chamber 42 Side. In this embodiment, the second half-shell 12 further has an opening 122 corresponding to the receiving groove 1121 of the first receiving groove body 112. In this way, when the battery 71 runs out of power, the user can first remove the bushing 20, and then take out the battery 71 located in the accommodating groove 1121 of the first accommodating groove body 112 through the opening 122 for replacement.

The signal control module 80 includes a lever 81 and a signal controller 82. The shift lever 81 is pivotally disposed on the brake lever 30, and the signal controller 82 is disposed on the brake lever 30 and electrically connected to the circuit board 72. When the user wants to change gear while riding a bicycle, the signal controller 82 can be sent to the circuit board 72 by toggling the lever 81, and then the antenna 73 will send the shift signal to the transmission of the bicycle ( (Not shown) receiver (not shown) to enable the transmission to shift gears.

In this embodiment, since the hydraulic chamber 41, the oil storage chamber 42 and the oil injection passage 43 are sequentially arranged from the side of the hydraulic cylinder 40 adjacent to the pivot shaft 31 to the hydraulic cylinder 40 adjacent to the assembly element 50 The sides of the hydraulic cylinder 40 are arranged one behind the other, so the height and width of the hydraulic cylinder 40 are more reduced compared to the hydraulic cylinder 40 in which the hydraulic chamber 41 and the oil storage chamber 42 are arranged side by side or vertically. The height and width of the brake handle 1 of the overall bicycle are shortened, thus improving the aesthetic appearance of the bicycle.

In addition, as can be seen from FIG. 3, the hydraulic chamber 41 of this embodiment is an inclined chamber, so the use of the pull-type piston assembly 60 can make the position of the oil outlet 44 away from the bottom of the hydraulic cylinder 40, so with The pipeline connected to the oil outlet 44 also avoids the bottom of the hydraulic cylinder 40, and frees up the space at the bottom of the hydraulic cylinder 40 for the battery 71 to place, so the effect of effectively using the space is achieved.

In this embodiment, since the housing 10 is divided into the first half 11 and the second half 12, in the process of assembling the brake handle 1 of the bicycle, the hydraulic cylinder 40, the circuit board 72 and the battery can be 71 is placed on the first half shell 11, and then the second half shell 12 is covered and combined with the first half shell 11. Wherein, since the first accommodating groove 112 of the first half-shell 11 protrudes from the fitting surface S and has a sufficient length, after the battery 71 is inserted into the first accommodating groove 112, the first accommodating groove The body 112 can provide the function of carrying the battery 71 alone. Therefore, it is not necessary for the second half shell 12 to be provided with another accommodating groove body to carry the battery 71 together with the first accommodating groove body 112. In this way, it is possible to avoid the extra time spent in aligning the accommodating grooves of the two half shells during the assembly process, so the assembly efficiency of the brake handle 1 of the bicycle is improved.

In the foregoing embodiment, the oil pressure chamber 41 and the oil storage chamber 42 are arranged one behind the other, but it is not limited thereto. Please refer to Figure 5 and Figure 6. 5 is a schematic perspective view of a brake handle of a bicycle according to a second embodiment of the invention. 6 is a schematic cross-sectional view of the brake handle of the bicycle of FIG. 5.

The brake handle 1a of the bicycle of this embodiment includes a housing 10a, a hydraulic cylinder 30a, a brake lever 40a, a piston assembly 50a, an assembly element 60a, an oil groove cover 70a, a first positioning member 80a, a The second positioning member 90a and a signal transmission module 100a.

The housing 10a surrounds an accommodating space 11a, and the hydraulic cylinder 30a is disposed in the accommodating space 11a. The hydraulic cylinder 30a has a hydraulic chamber 31a, an oil outlet 32a, a port 33a, and a valve plug 34a. The oil outlet 32a is located in the hydraulic chamber 31a, and the port 33a communicates with the hydraulic chamber 31a, and the valve plug 34a is installed in the port 33a.

The brake lever 40a has a pivot shaft 41a, an end edge 42a, and a drive shaft 43a. The driving shaft 43a is located above the pivot shaft 41a, and the end edge 42a is located on the side of the brake lever 40a away from the pivot shaft 41a. In this embodiment, the pivot shaft 41a is pivotally disposed on the hydraulic cylinder 30a. The piston assembly 50a is, for example, a pull-type supercharging structure. In detail, the piston assembly 50a includes a connecting rod 51a, a piston 52a and an elastic return member 53a. The piston 52a is slidably disposed in the hydraulic chamber 31a, and the elastic return member 53a has a fixed end 531a and a movable end 532a opposite to each other. The fixed end 531a is fixed to the valve plug 34a, and the movable end 532a abuts the piston 52a. The connecting rod 51a is provided with an elastic return member 53a and a valve plug 34a, and the opposite ends of the connecting rod 51a are connected to the driving shaft 43a and the piston 52a of the brake lever 40a, respectively. Among them, the oil outlet 32a is located between the drive shaft 43a of the brake lever 40a and the piston 52a, and the elastic return member 53a is used to apply a force that moves the piston 52a away from the oil outlet 32a. The assembling element 60a is, for example, a clip for mounting on a handlebar 2 of a bicycle.

The oil groove cover 70a is positioned on the hydraulic cylinder 30a through the first positioning member 80a and the second positioning member 90a, and forms an oil storage chamber 110a with the hydraulic cylinder 30a. The oil storage chamber 110a is located above the hydraulic chamber 31a and communicates with the hydraulic chamber 31a. That is, the oil storage chamber 110a is farther away from the end 42a of the brake lever 40a than the hydraulic chamber 31a. The oil groove cover 70a has an oil injection hole 71a, and the oil injection hole 71a communicates with the oil storage chamber 110a.

As shown in FIG. 6, the oil storage chamber 110a has a first oil storage portion 111a and a second oil storage portion 112a communicating with each other, and the first oil storage portion 111a is farther away from the assembly element than the second oil storage portion 112a 60a. In this embodiment, the side of the oil tank cover 70a away from the assembly element 60a is raised compared to the side of the oil tank cover 70a adjacent to the assembly element 60a, so that the oil tank cover 70a matches the shape of the housing 10a, and the first oil storage portion The depth D1 of 111a is greater than the depth D2 of the second oil reservoir 112a. In this embodiment, since the oil sump cover 70a matches the shape of the housing 10a, when the user holds the bicycle brake handle 1a, the bicycle brake handle 1a can provide a better support effect.

In addition, in this embodiment, the depth D2 of the second oil reservoir 112a is smaller than the inner diameter R of the hydraulic chamber 31a. In this way, it can be ensured that in a configuration in which the oil storage chamber 110a and the hydraulic chamber 31a are stacked one above the other, the brake handle 1a of the bicycle still maintains the thinning effect, and the aesthetics of the brake handle 1a of the bicycle is maintained.

The signal transmission module 100a includes a battery 101a, a circuit board 102a and an antenna 103a. The battery 101a is electrically connected to the circuit board 102a, and the antenna 103a is disposed on the circuit board 102a. In this embodiment, the housing 10a has an inner wall surface 12a facing the accommodating space 11a. The locations of the battery 101a and the circuit board 102a are similar to the battery 71 and the circuit board 72 of FIG. In detail, the battery 101a and the circuit board 102a are located between the inner wall surface 12a and the hydraulic cylinder 30a, and the battery 101a and the circuit board 102a are respectively located on two adjacent sides of the hydraulic chamber 31a. The battery 101a is adjacent to the end 42a of the brake lever 40a compared to the hydraulic chamber 31a. That is, the battery 101a is located below the hydraulic chamber 31a, and the circuit board 102a is located on the side of the hydraulic chamber 31a.

The above descriptions are based on the brake lever on the right side of the bicycle as an example, but not limited to this. In other embodiments, the above configuration can also be applied to the left brake handle of the bicycle.

According to the brake handle of the bicycle according to the above embodiment, since the hydraulic chamber, the oil storage chamber and the oil injection channel are sequentially arranged from the side of the hydraulic cylinder adjacent to the pivot shaft to the side of the hydraulic cylinder adjacent to the assembly element The height and width of the hydraulic cylinder are reduced compared to the hydraulic cylinder and the oil storage chamber are arranged side by side or vertically, so the height of the brake handle of the overall bicycle is shortened And width, thus enhancing the aesthetic appearance of the bicycle.

In addition, the use of a pull-type piston assembly can keep the location of the oil outlet away from the bottom of the hydraulic cylinder, so the pipeline connected to the oil outlet also avoids the bottom of the hydraulic cylinder and frees the bottom of the hydraulic cylinder The space is used for battery placement, so the effect of effective use of space is achieved.

In addition, since the first accommodating groove of the first half-shell protrudes out of the fitting surface and has a sufficient length, after the battery is placed in the first accommodating groove, the first accommodating groove can be provided separately Because of the role of carrying the battery, it is not necessary for the second half shell to be provided with another accommodating groove body to carry the battery together with the first accommodating groove body. In this way, it is possible to avoid the extra time spent in aligning the accommodating grooves of the two half shells during the assembly process, so the assembly efficiency of the brake handle of the bicycle is improved.

In the configuration where the oil groove cover is installed above the hydraulic cylinder block, since the oil groove cover matches the shape of the housing, when the user holds the brake handle of the bicycle, the brake handle of the bicycle can provide better support effect. In addition, by setting the depth of the second oil storage portion of the oil storage chamber to be smaller than the inner diameter of the oil pressure chamber, the brake handle of the bicycle can still maintain a thin effect, and the aesthetics of the brake handle of the bicycle can be maintained.

Although the present invention is disclosed as above with the foregoing embodiments, it is not intended to limit the present invention. Any person familiar with similar arts can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of patent protection for inventions shall be subject to the scope defined in the patent application scope attached to this specification.

1. 1a‧‧‧Brake handle of bicycle 2‧‧‧Hand grip 10, 10a‧‧‧Shell 11‧‧‧First half shell 111‧‧‧First assembly edge 112‧‧‧First receiving groove Body 113‧‧‧Second accommodating groove body 1121, 1131‧‧‧Accommodating groove 12‧‧‧Second half shell 121‧‧‧Second assembly edge 122‧‧‧Opening 13, 11a‧‧‧accommodating space 14.12a‧‧‧Inner wall surface 20‧‧‧ Bush 30, 40a‧‧‧Brake lever 31, 41a‧‧‧Pivot shaft 32, 42a‧‧‧End 33, 43a‧‧‧Drive shaft 40, 30a‧ ‧‧Hydraulic cylinder 41, 31a ‧‧‧Hydraulic chamber 42, 110a ‧‧‧ Oil storage chamber 45, 33a ‧‧‧ Port 46, 34a ‧‧‧Plug 111a ‧‧‧ First oil storage Part 112a‧‧‧Second oil storage part 43‧‧‧Injection passage 44, 32a‧‧‧Outlet hole 50, 60a‧‧‧Assembly element 60, 50a‧‧‧Piston assembly 61, 51a‧‧‧Link 62 、52a‧‧‧Piston 63、53a‧‧‧Elastic reset piece 631、531a‧‧‧Fixed end 632、532a‧‧‧Mobile end 70,100a‧‧‧Signal transmission module 71,101a‧‧‧Battery 72, 102a‧‧‧Circuit board 73, 103a‧‧‧Antenna 80‧‧‧Signal control module 81‧‧‧Dial lever 82‧‧‧Signal controller 70a‧‧‧Oil tank cover 71a‧‧‧Filling hole 80a‧‧‧ First positioning piece 90a‧‧‧Second positioning piece P‧‧‧Axis S‧‧‧‧Fit surface D1, D2‧‧‧Depth R‧‧‧Inner diameter

FIG. 1 is a schematic perspective view of a bicycle handle according to a first embodiment of the present invention mounted on a handlebar of a bicycle. FIG. 2 is an exploded schematic view of the brake handle of the bicycle of FIG. 1. 3 is a schematic cross-sectional view of the brake handle of the bicycle of FIG. 1. 4 is another schematic cross-sectional view of the brake handle of the bicycle of FIG. 1. 5 is a schematic perspective view of a brake handle of a bicycle according to a second embodiment of the invention. 6 is a schematic cross-sectional view of the brake handle of the bicycle of FIG. 5.

1‧‧‧Brake handle of bicycle

2‧‧‧Rider Grip

10‧‧‧Housing

20‧‧‧ Bush

30‧‧‧brake lever

50‧‧‧Assembly components

80‧‧‧signal control module

Claims (23)

A brake handle of a bicycle, suitable for assembling in a grip of a rider, includes: a housing surrounding an accommodating space; a hydraulic cylinder body arranged in the accommodating space, the hydraulic cylinder body having an oil A pressure chamber, an oil storage chamber and an oil injection channel, the oil storage chamber is located between the oil pressure chamber and the oil injection channel; a brake lever with a pivot shaft, the pivot shaft is pivotally arranged at the oil pressure A cylinder; and an assembly element, which is arranged on the hydraulic cylinder and used to be installed on the grip of the driver; wherein, the hydraulic chamber, the oil storage chamber and the oil injection channel are located at the pivot of the brake lever Between the rotating shaft and the assembling element, and the oil pressure chamber is closer to the pivot shaft of the brake lever than the oil storage chamber and the oil injection channel. The brake handle of a bicycle as described in item 1 of the patent application scope, wherein a central axis passing through the oil injection passage is defined, and the central axis is kept at a distance from the oil storage chamber. The brake handle of the bicycle as described in item 1 of the patent scope further includes a piston assembly, and the brake lever further has a drive shaft. The piston assembly includes a connecting rod and a piston. The opposite ends of the connecting rod are respectively The drive shaft and the piston connected to the brake lever are slidably arranged in the hydraulic chamber, the hydraulic cylinder further has an oil outlet, the oil outlet is located in the hydraulic chamber, and the The oil outlet is located between the drive shaft of the brake lever and the piston. The brake handle of a bicycle as described in item 3 of the patent application scope, wherein the piston assembly further includes an elastic return member, and the hydraulic cylinder body has a port and a valve plug, the port communicates with the hydraulic chamber, The valve plug is installed at the through port, the elastic reset member has a fixed end and a movable end opposite, the fixed end is fixed to the valve plug, the movable end abuts the piston, and the elastic reset member is used to apply The force of the piston moving away from the oil outlet hole, the connecting rod penetrates the elastic return member and the valve plug. The brake handle of a bicycle as described in item 1 of the patent application scope further includes a signal transmission module including a battery, a circuit board and an antenna, the battery is electrically connected to the circuit board and the antenna Located on the circuit board, the housing has an inner wall surface facing the accommodating space, the battery and the circuit board are located between the inner wall surface and the hydraulic cylinder, and the battery and the circuit board are located respectively The two adjacent sides of the oil storage chamber. The brake handle of a bicycle as described in item 5 of the patent application, wherein the brake lever has an end edge on a side away from the pivot shaft, and the battery is adjacent to the end edge of the brake lever compared to the oil storage chamber. The brake handle of a bicycle as described in item 5 of the patent application scope, wherein the housing has an opening corresponding to the battery. The brake handle of a bicycle as described in item 5 of the patent application scope, wherein the housing includes a first half shell and a second half shell assembled together, the first half shell has a first assembly edge and a first The accommodating groove body, the second half shell has a second assembly edge, the first assembly edge is attached to the second assembly edge, the first half shell and the second half shell together form the accommodating space and the On the inner wall surface, a bonding surface is formed at the bonding position of the first assembly edge and the second assembly edge, the first accommodating groove body extends toward the second half shell and protrudes from the bonding surface, and the battery is provided In the first accommodating tank. The brake handle of a bicycle as described in item 8 of the patent application scope, wherein the first half shell further has a second accommodating groove body, and the circuit board is disposed in the second accommodating groove body. A brake handle for a bicycle includes: a housing including a first half shell and a second half shell assembled together, the first half shell having a first assembly edge and a first accommodating groove body, the first The two half shells have a second assembly edge, the first assembly edge is attached to the second assembly edge, and the first half shell and the second half shell together surround a receiving space, and the first assembly edge is A bonding surface is formed at the bonding position of the second assembly edge, the first accommodating groove body extends toward the second half-shell and protrudes from the bonding surface; a hydraulic cylinder is arranged in the accommodating space A brake lever, pivotally mounted on the hydraulic cylinder; and a signal transmission module, including a battery, the battery is disposed in the first housing groove. The brake handle of a bicycle as described in item 10 of the patent scope, wherein the signal transmission module further includes a circuit board and an antenna, the battery is electrically connected to the circuit board, the antenna is disposed on the circuit board, the first The half shell further has a second accommodating groove body, and the circuit board is disposed in the second accommodating groove body. The brake handle of a bicycle as described in item 10 of the patent application scope, wherein the second half shell has an opening, and the first accommodating groove body has an accommodating groove, the opening corresponds to the accommodating groove, and the battery Located in the accommodating groove. A brake handle of a bicycle, suitable for assembling in a grip of a rider, includes: a housing surrounding an accommodating space; a hydraulic cylinder body arranged in the accommodating space, the hydraulic cylinder body having an oil A pressure chamber and an oil outlet hole, the oil outlet hole is located in the oil pressure chamber; a brake lever with a pivot shaft and a drive shaft, the pivot shaft is pivotally arranged on the hydraulic cylinder; a piston assembly, including A connecting rod and a piston, the opposite ends of the connecting rod are respectively connected to the driving shaft of the brake lever and the piston, the piston is slidably disposed in the hydraulic chamber, and the oil outlet is located on the brake lever Between the driving shaft and the piston; and an assembly element, which is arranged on the hydraulic cylinder body and is arranged on the grip of the driver. The brake handle of the bicycle as described in item 13 of the patent application further includes an oil groove cover, the oil groove cover is mounted on the hydraulic cylinder body, and the oil groove cover and the hydraulic cylinder body together form an oil storage chamber The oil storage chamber is located above the oil pressure chamber, and the oil storage chamber communicates with the oil pressure chamber, and the oil tank cover has an oil injection hole communicating with the oil storage chamber. The brake handle of a bicycle as described in item 14 of the patent application scope, wherein the oil storage chamber has a first oil storage portion and a second oil storage portion communicating with each other, and the first oil storage portion is compared with the first The second oil storage part is far away from the assembly element. The brake handle of a bicycle as described in item 15 of the patent application range, wherein the depth of the first oil reservoir is greater than the depth of the second oil reservoir. The brake handle of a bicycle as described in item 15 of the patent application scope, wherein the depth of the second oil reservoir is smaller than the inner diameter of the hydraulic chamber. The brake handle of the bicycle as described in item 14 of the patent application further includes a first positioning member, and the oil groove cover is positioned on the hydraulic cylinder body through the first positioning member. The brake handle of the bicycle as described in Item 18 of the patent application further includes a second positioning member, the oil groove cover is positioned on the hydraulic cylinder through the first positioning member and the second positioning member, and the first The positioning member and the second positioning member are located on opposite sides of the hydraulic cylinder. The brake handle of a bicycle as described in item 13 of the patent application scope further includes a signal transmission module including a battery, a circuit board and an antenna, the battery is electrically connected to the circuit board and the antenna Located on the circuit board, the housing has an inner wall surface facing the accommodating space, the battery and the circuit board are located between the inner wall surface and the hydraulic cylinder, and the battery and the circuit board are located respectively The two adjacent sides of the hydraulic chamber. The brake handle of a bicycle as described in item 20 of the patent application range, wherein the brake lever has an end edge on a side away from the pivot shaft, and the battery is adjacent to the end edge of the brake lever compared to the hydraulic chamber. The brake handle of a bicycle as described in item 13 of the patent application scope, wherein the piston assembly further includes an elastic return member, and the hydraulic cylinder body has a port and a valve plug, the port communicates with the hydraulic chamber, The valve plug is installed at the through port, the elastic reset member has a fixed end and a movable end opposite, the fixed end is fixed to the valve plug, the movable end abuts the piston, and the elastic reset member is used to apply The force of the piston moving away from the oil outlet hole, the connecting rod penetrates the elastic return member and the valve plug. The brake handle of a bicycle as described in item 22 of the patent application scope, wherein the drive shaft is located above the pivot shaft.

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