WO2017119328A1

WO2017119328A1 - Hydraulic master cylinder device for handlebar vehicle

Info

Publication number: WO2017119328A1
Application number: PCT/JP2016/088613
Authority: WO
Inventors: 小林　直樹; 靖史田中
Original assignee: 日信工業株式会社
Priority date: 2016-01-06
Filing date: 2016-12-26
Publication date: 2017-07-13
Also published as: JPWO2017119328A1; TW201730026A; JP6603330B2; TWI635005B

Abstract

Provided is a hydraulic master cylinder device for a handlebar vehicle, with which a driver can satisfactorily adjust a grip margin while feeling the grip margin adjustment carried out via an adjustment bolt. The adjustment bolt comprises: a male thread part 15a that threadedly engages with a female threaded hole 12c of an adjustment bolt attachment part 12b and that is screwed such that an amount of projection toward a knocker 13 can be adjusted; a knocker abutting part 15b that is provided at one end of the male thread part 15a; and a handle part 15d that is provided at the other end of the male thread part 15a. The handle part 15d is provided with a rotation shaft 15e that is formed in a polygonal columnar shape, and an operation part 15f that rotates the adjustment bolt 15. A spring member 16 that elastically presses against a flat part 15h of the rotation shaft 15e is attached to the adjustment bolt attachment part 12b, and the spring member 16 provides a click sensation as the spring member moves from a first flat part 15h against which the spring member presses, crosses over a protrusion 15g, and then presses against a second flat part 15i in accordance with the rotation of the rotation shaft 15e.

Description

Hydraulic master cylinder device for bar handle vehicle

The present invention relates to a hydraulic master cylinder device for a bar handle vehicle that generates a hydraulic pressure in a hydraulic master cylinder attached to a handle bar of various bar handle vehicles to operate a brake or a clutch. The present invention relates to a hydraulic master cylinder device for a bar handle vehicle, which is provided with an adjusting bolt for adjusting a grip margin formed between an operation lever pivotally attached to the handlebar and a grip provided on the front end side of the handlebar.

Conventionally, as a hydraulic master cylinder device for a bar handle vehicle, an operation lever pivotally attached to a cylinder body of the hydraulic master cylinder is provided with a lever main body disposed along the front side of the grip body, the lever main body, It is divided into a knocker disposed between the cylinder hole and the opening of the cylinder hole formed in the cylinder body, and a grip margin formed between the operation lever and the grip is adjusted between the lever body and the knocker. There was one in which an adjustment bolt was arranged (for example, see Patent Document 1).

Japanese Patent No. 3851606

However, in the above-mentioned Patent Document 1, it is possible to easily adjust the grip margin formed between the lever body and the grip by turning the adjustment bolt to adjust the amount of protrusion in the knocker direction. Although the adjustment bolt can be adjusted from a shortest protrusion amount to the maximum protrusion amount, the protrusion amount is adjusted by a series of rotation operations, and the grip margin is adjusted steplessly. It was difficult to feel the operation.

Therefore, an object of the present invention is to provide a hydraulic master cylinder device for a bar handle vehicle in which a driver can adjust a grip margin well while realizing a grip margin adjustment operation using an adjustment bolt.

In order to achieve the above object, a hydraulic master cylinder device for a bar handle vehicle according to the present invention includes a hydraulic master cylinder attached to a handle bar, and an operation lever pivotally attached to a cylinder body of the hydraulic master cylinder. The operation lever is divided into a lever main body disposed in front of a grip provided on a distal end side of a handle bar and a knocker that pushes a piston of the hydraulic master cylinder, and the lever A grip formed between the operation lever and the grip is formed by screwing an adjustment bolt that contacts the knocker into an adjustment bolt mounting portion provided on the main body so that the protrusion amount can be adjusted, and rotating the adjustment bolt. In the hydraulic master cylinder device for a bar handle vehicle that adjusts the allowance, the adjustment bolt is provided with the adjustment bolt remover. A male screw part that is screwed into a female screw hole formed in the part and is screwed so as to be adjustable toward the knocker, and a knocker contact part that is provided at one end of the male screw part and contacts the knocker And a handle portion provided at the other end of the male screw portion, the handle portion including a rotary shaft formed in a polygonal column shape and an operation portion for rotating the adjustment bolt, and the adjustment bolt A spring member that is elastically pressed against the flat portion of the rotating shaft is attached to the mounting portion, and the spring member is connected to the angle of the rotating shaft from the first flat portion that is in pressure contact with the rotation of the rotating shaft. It is characterized in that a click feeling is given by overcoming the part and pressing against the second plane part. Furthermore, it is preferable that a push rod is interposed between the piston and the knocker, and the knocker pushes the piston via the push rod.

A hydraulic master cylinder attached to the handlebar; and an operation lever pivotally attached to a cylinder body of the hydraulic master cylinder. The adjustment bolt mounting portion provided on the operation lever includes the hydraulic master An adjustment bolt that contacts the piston of the cylinder or a push rod that pushes the piston is screwed so that the amount of protrusion can be adjusted, and the adjustment bolt is rotated so that the adjustment lever and the handlebar are provided at the front end side. In a hydraulic master cylinder device for a bar handle vehicle for adjusting a grip margin formed between a grip and a grip, the adjustment bolt is screwed into a female screw hole formed in the adjustment bolt mounting portion, and the piston or push A male threaded portion that is screwed toward the rod so that the amount of protrusion can be adjusted, and provided at one end of the male threaded portion. A contact portion that contacts the piston or the push rod, and a handle portion provided at the other end of the male screw portion. The handle portion includes a rotary shaft formed in a polygonal column shape, and the adjustment bolt. A spring member that elastically presses against the flat portion of the rotating shaft, and the spring member presses in accordance with the rotation of the rotating shaft. It is characterized in that a click feeling is imparted by overcoming a corner portion of the rotation shaft from the first plane portion and pressing against the second plane portion.

Further, the adjustment bolt mounting portion is provided with a spring member mounting portion and a spring member latching portion facing each other with the female screw hole interposed therebetween, and the spring member is formed by bending an elastic wire, and the spring member A linear mounting portion that is attached to the mounting portion, and the flat portion that extends from both ends of the mounting portion across the rotation shaft of the adjustment bolt screwed into the female screw hole and that faces the rotation shaft It is preferable that a pair of spring pieces that are in pressure contact with each other, and a latch piece provided at the tip of each spring piece and latched on the spring member latch portion.

In addition, the pair of spring pieces each have a first curved portion that is convex in a direction approaching the center portion, and in a direction away from each other on the proximal end side and the distal end side of the first curved portion. Preferably, two convex second curved portions are formed, and the first curved portion is in pressure contact with the flat portion.

According to the hydraulic master cylinder device for a bar handle vehicle of the present invention, when the adjustment bolt is rotated by rotating the handle portion of the adjustment bolt, the spring member pressed against the first flat portion of the rotation shaft is By elastically deforming and overcoming the corners of the rotating shaft and pressing against the second plane portion to give a click feeling, the driver can feel the grip allowance adjustment operation with the click feeling provided, and realize the grip allowance. Can be adjusted satisfactorily.

Further, the adjustment bolt mounting portion is provided with the spring member mounting portion and the spring member latching portion facing each other with the female screw hole interposed therebetween, and the spring member is formed by bending an elastic wire and is attached to the spring member mounting portion. A linear mounting portion, a pair of spring pieces that extend from both ends of the mounting portion with the rotation shaft sandwiched therebetween and press-contact with the opposing flat portions of the rotation shaft, and spring tips provided at the tip portions of the spring pieces. By providing the latching piece latched on the member latching portion, the elastic force of the spring member can be maintained, and a click feeling can be reliably imparted.

Further, the pair of spring pieces are respectively formed with first curved portions that are convex in the direction of approaching each other at the central portion, and are convex in the directions away from each other on the proximal end side and the distal end side of the first curved portion. When the handle portion is rotated, the spring piece is elastically deformed well and a good click feeling is obtained. be able to.

It is principal part sectional drawing of the hydraulic master cylinder apparatus which shows the 1st form example of this invention. It is a front view of a hydraulic master cylinder device similarly. It is a side view of a hydraulic master cylinder device similarly. It is a front view of the state which similarly attached the adjustment bolt to the adjustment bolt mounting part. FIG. 5 is a VV cross-sectional view of FIG. 4. FIG. 6 is a view taken along arrow VI-VI in FIG. 5. FIG. 6 is a view taken along arrow VI-VI in FIG. 5 in a state where the adjustment bolt is rotated. It is one side view of the state which attached the adjusting bolt to the adjusting bolt attaching part which shows the 1st form example of this invention. It is the other side view of the state which similarly attached the adjustment bolt to the adjustment bolt attaching part. It is a principal part sectional view of a fluid pressure master cylinder device showing the state where an adjustment bolt is not screwed in the same way. It is a principal part sectional view of the hydraulic master cylinder device for vehicles showing the state where the adjustment bolt was screwed in the most. It is principal part sectional drawing of the hydraulic master cylinder apparatus which shows the 2nd form example of this invention.

FIGS. 1 to 11 are views showing a first embodiment in which the present invention is applied to a hydraulic master cylinder device for a front brake of a bar handle vehicle. The hydraulic master cylinder device 1 of the present embodiment is a vehicle body front portion. A hydraulic master cylinder 4 attached in the vicinity of the accelerator grip 3 of the handlebar 2 for steering a front wheel (not shown), an operation lever 5 attached to the hydraulic master cylinder 4, and a push interposed therebetween Rod 6.

The hydraulic master cylinder 4 is a reservoir-integrated type having a reservoir 7 in the upper part of the cylinder body 4a, and the handle bar 2 is held by a mounting bracket 4b and a holder 8 formed integrally with the cylinder body 4a. Fastened at 8a and 8a, the handlebar 2 is disposed on the front side of the vehicle body. A pair of upper and

lower lever brackets

4c, 4c are extended on the vehicle body front side of the cylinder body 4a, and an operation lever 5 is pivotally attached to the

lever brackets

4c, 4c.

The cylinder body 4a is provided with a bottomed cylinder hole 4d that opens on the operation lever side, and a piston 9 is inserted into the cylinder hole 4d through the cup seals 9a and 9b so as to be movable. A hydraulic chamber 10 is defined between the bottom wall of the hole. A return spring 11 is contracted between the bottom wall of the cylinder hole 4d and the piston 9, and the piston 9 is always urged toward the opening of the cylinder hole 4d by the elastic force of the return spring 11, The retreat limit of the piston 9 is regulated by a stopper piece 13c of a knocker 13 (to be described later) coming into contact with the cylinder body 4a via the push rod 6.

The operating lever 5 is disposed in front of the accelerator grip 3 and is divided into a lever body 12 having a grip portion 12a and a knocker 13 having a working arm 13a that contacts the rear end portion of the push rod 6. Each of the two-piece types is pivotally attached to the lever bracket 4c of the cylinder body 4a using a pivot 14.

The lever main body 12 includes a pivot base portion through which the pivot 14 is inserted, and the grip portion 12a extending from the pivot base portion toward the vehicle body front side of the accelerator grip 3, and on the pivot base side of the grip portion 12a. An adjustment bolt mounting portion 12b to which an adjustment bolt 15 for adjusting a grip margin is screwed is protruded from the grip side surface. The adjustment bolt mounting portion 12b is formed with a female screw hole 12c that is opened through the cylinder hole side surface and the anti-cylinder hole side surface. And the spring member latching portion 12e are provided to face each other with the female screw hole 12c interposed therebetween.

The knocker 13 includes a rotation base 13b, the working arm 13a, and a stopper piece 13c that protrudes from the rotation base 13b toward the front side wall of the cylinder body 4a. The working arm 13a is provided with a push rod abutting portion 13d that abuts against the push rod 6 on the side surface of the cylinder hole, and an adjustment bolt abutting surface 13e that abuts against the adjusting bolt 15 on the side surface opposite to the cylinder hole.

The lever body 12 and the knocker 13 are urged counterclockwise in FIG. 1 with the pivot 14 as a fulcrum by the contact between the working arm 13a and the push rod 6, and the rotation limit during non-braking is limited to the stopper piece. 13c and the cylinder body 4a are regulated by contact with the vehicle body front side wall. In addition, a spring 17 is contracted on the vehicle body front side of the lever main body 12 and the knocker 13, and due to the elastic force of the spring 17, the adjustment bolt 15 is always in contact with the adjustment bolt contact surface 13e. The backlash of the lever main body 12 is suppressed.

The adjustment bolt 15 is screwed into a female screw hole 12c provided in the adjustment bolt mounting portion 12b, and is screwed into the knocker 13 so that the protrusion amount can be adjusted, and provided at one end of the male screw portion 15a. And a handle portion 15d that is caulked and fixed to a small diameter shaft portion 15c provided at the other end of the male screw portion 15a. The handle portion 15d has a rotating shaft 15e formed in a hexagonal column shape on the male screw portion side, and a large-diameter operation portion 15f for rotating the adjustment bolt 15 on the distal end side. A convex portion 15g protruding outward is formed at a corner portion of the shaft 15e.

The spring member 16 is formed by bending an elastic wire, and is attached to a linear mounting portion 16a, a pair of

spring pieces

16b and 16b extending from both ends of the mounting portion 16a, and a distal end portion of each spring piece 16b. There are provided latching

pieces

16c, 16c. The pair of spring pieces 16b are formed with a first curved portion 16d that protrudes in a direction approaching each other at the center, and are spaced apart from each other on the proximal end side and the distal end side of the first curved portion 16d. Two second

curved portions

16e, 16e that are convex in the direction are formed. In the spring member 16, the mounting portion 16a is attached to the spring member attaching portion 12d, the pair of

spring pieces

16b and 16b are disposed with the rotating shaft 15e of the adjusting bolt 15 interposed therebetween, and the latching

pieces

16c and 16c are latched by the spring member. By latching on the portion 12e, the first

curved portions

16d, 16d of the

spring pieces

16b, 16b are elastically pressed against the opposing first

flat portions

15h, 15h of the rotating shaft 15e, respectively.

In the hydraulic master cylinder device 1 formed as described above, the grip margin formed between the accelerator grip 3 and the grip portion 12a of the operation lever 5 is expanded or contracted by the screwing amount of the adjusting bolt 15 into the female screw hole 12c. In the state where the adjusting bolt 15 shown in FIG. 10 is not screwed into the knocker side, the grip margin is the smallest. From this state, when the operating portion 15f is rotated to screw the adjusting bolt 15 into the female screw hole 12c and the male screw portion 15a protrudes toward the knocker 13, the lever main body 12 has the pivot 14 as a fulcrum as a fulcrum. When the adjustment bolt 15 shown in FIG. 11 is most screwed in, the grip margin is maximized.

As shown in FIG. 6, such adjustment of the grip allowance is maintained while the first

curved portions

16 d and 16 d of the spring member 16 are in pressure contact with the first

flat portions

15 h and 15 h facing the adjustment bolt 15. This is performed by rotating the operation portion 15f of the handle portion 15d. As the operation portion 15f rotates, the

first bending portions

16d and 16d that are in pressure contact with the

first plane portions

15h and 15h are replaced with the

second bending portions

16e and 16e, as shown in FIG. Each of the first curved portions 16d and the second curved portions 16e returns to the initial state after the convex portion 15g of the rotating shaft 15e is overcome while elastically deforming the first

curved portions

16d and 16d. A click feeling (a so-called tick at the time of operation) is imparted by pressing against the

portions

15i and 15i.

Thus, the driver can obtain a click feeling every time the operation unit 15f is rotated by a predetermined amount, and adjusts the grip margin well while realizing the grip margin adjustment operation by the click feeling provided. Can do. The adjustment bolt mounting portion 12b is provided with a spring member mounting portion 12d and a spring member latching portion 12e facing each other with the female screw hole 12c interposed therebetween, and the spring member 16 includes a mounting portion 16a attached to the spring member mounting portion. A pair of

spring pieces

16b, 16b extending across the rotating shaft 15e from both ends of the mounting portion 16a, and a latch provided at the tip of each spring piece 16b and latched by the spring member latching portion 12e By providing the

pieces

16c and 16c, the elastic force of the spring member 16 can be maintained, and a click feeling can be reliably imparted. Further, the pair of

spring pieces

16b, 16b are respectively formed with first curved portions 16d that protrude in the direction of approaching each other at the center, and are spaced apart from each other on the proximal end side and the distal end side of the first curved portion 16d. Since the two second

curved portions

16e and 16e that are convex in the direction to be formed are formed, the spring piece is elastically deformed well with the rotation of the rotating shaft 15e, and a good click feeling can be obtained. .

FIG. 12 shows a second embodiment of the present invention. Components that are the same as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

The hydraulic master cylinder device 21 of the present embodiment includes a hydraulic master cylinder 4, an operation lever 22 attached to the hydraulic master cylinder 4, and a push rod 6 interposed therebetween, The piston (not shown) of the pressure master cylinder 4 has its retreat limit regulated by a regulating member (not shown) such as a C clip. The operating lever 22 is disposed in front of the accelerator grip 3 and includes a turning base portion 22a and a grip portion 22b extending from the turning base portion 22a to the front side of the accelerator grip 3 toward the vehicle body. An adjustment bolt mounting portion 22c for screwing an adjustment bolt 23 that adjusts the grip allowance protrudes from the grip side surface of the rotating base side of 22b.

The adjusting bolt 23 is screwed into a female screw hole 22d provided in the adjusting bolt mounting portion 22c, and is screwed to the push rod 6 so that the protrusion amount can be adjusted, and one end of the male screw portion 23a. A push rod abutting portion 23b that abuts against the push rod 6 and a handle portion 23d that is caulked and fixed to a small-diameter shaft portion 23c provided at the other end of the male screw portion 23a. The handle portion 23d is integrally provided with a rotary shaft 23e that is arranged on the male screw portion side and formed in a hexagonal column shape, and a large-diameter operation portion 23f that is arranged on the distal end side and rotates the adjusting bolt 23. Further, the same spring member 16 as that in the first embodiment is mounted on the adjustment bolt mounting portion 22c.

In this embodiment, when the operating portion 23f is rotated to screw the adjusting bolt 23 into the female screw hole 22d of the adjusting bolt mounting portion 22c and the male screw portion 23a protrudes toward the push rod 6, the operating lever 22 pivots. By turning 14 toward the front of the vehicle body as a fulcrum, the grip margin is expanded. Further, when adjusting the gripping margin, the driver can obtain a click feeling by elastic deformation of the spring member 16 every time the operating portion 23f is rotated by a predetermined amount, as in the first embodiment. The grip allowance can be adjusted well while realizing the grip allowance adjusting operation.

The present invention is not limited to the above-described embodiments, and the spring member is a first member in which a spring piece that is elastically pressed against the flat portion of the rotating shaft of the handle portion is pressed in accordance with the rotation of the rotating shaft. The shape is arbitrary as long as it can be clicked from the plane portion of 1 and over the corner portion of the rotation axis and pressed against the second plane portion to give a click feeling. It may be elastically pressed. Moreover, the rotating shaft formed in the handle | steering-wheel part of an adjustment volt | bolt does not need to form not only the hexagonal column shape but the polygonal column shape, and may not form the convex part in a corner | angular part. Furthermore, the structure of the hydraulic master cylinder of the present invention is arbitrary and can be applied to a hydraulic master cylinder for a clutch. In each of the above-described embodiments, the piston of the hydraulic master cylinder is pushed by the operation lever via the push rod. However, the present invention is not limited to this, and the piston is pushed directly by the knocker or the operation lever. It can be anything.

DESCRIPTION OF SYMBOLS 1 ... Hydraulic master cylinder apparatus, 2 ... Handlebar, 3 ... Accelerator grip, 4 ... Hydraulic master cylinder, 4a ... Cylinder body, 4b ... Mounting bracket, 4c ... Lever bracket, 4d ... Cylinder hole, 5 ... Operation lever, 6 ... push rod, 7 ... reservoir, 8 ... holder, 8a ... bolt, 9 ... piston, 9a, 9b ... cup seal, 10 ... hydraulic chamber, 11 ... return spring, 12 ... lever body, 12a ... grip part, 12b ... Adjust bolt mounting portion, 12c ... Female screw hole, 12d ... Spring member mounting portion, 12e ... Spring member latching portion, 13 ... Knocker, 13a ... Working arm, 13b ... Rotating base, 13c ... Stopper piece, 13d ... Push rod Contact part, 13e ... Adjust bolt contact surface, 14 ... Pivot, 15 ... Adjust bolt, 15a ... Male screw , 15b ... knocker contact part, 15c ... small diameter shaft part, 15d ... handle part, 15e ... rotating shaft, 15f ... operation part, 15g ... convex part, 15h ... first flat part, 15i ... second flat part, DESCRIPTION OF SYMBOLS 16 ... Spring member, 16a ... Mounting part, 16b ... Spring piece, 16c ... Latching part, 16d ... 1st bending part, 16e ... 2nd bending part, 17 ... Spring, 21 ... Hydraulic master cylinder apparatus, 22 ... Operation Lever, 22a ... rotating base, 22b ... grip part, 22c ... adjustment bolt mounting part, 22d ... female screw hole, 23 ... adjustment bolt, 23a ... male screw part, 23b ... push rod contact part, 23c ... small diameter shaft part, 23d ... handle part, 23e ... rotating shaft, 23f ... operation part

Claims

A hydraulic master cylinder attached to the handle bar; and an operation lever pivotally attached to the cylinder body of the hydraulic master cylinder, the operation lever in front of a grip provided on a front end side of the handle bar. The lever body to be arranged and the knocker that pushes the piston of the hydraulic master cylinder are divided into two parts. In a hydraulic master cylinder device for a bar handle vehicle that adjusts a grip margin formed between the operation lever and the grip by screwing possible and rotating the adjustment bolt,
The adjustment bolt is provided at one end portion of the male screw portion, and a male screw portion screwed into a female screw hole formed in the adjustment bolt mounting portion and screwed so as to be adjustable in a protruding amount toward the knocker, A knocker contact portion that contacts the knocker; and a handle portion provided at the other end of the male screw portion. The handle portion rotates a rotation shaft formed in a polygonal column shape and the adjustment bolt. With an operation unit,
A spring member that is elastically pressed against the flat portion of the rotating shaft is attached to the adjustment bolt mounting portion, and the spring member is rotated from the first flat portion that is in pressure contact with the rotation of the rotating shaft. A hydraulic master cylinder device for a bar handle vehicle, wherein the hydraulic pressure master cylinder device for a bar handle vehicle is provided with a click feeling by overcoming a corner portion of a shaft and pressing against a second flat surface portion.
The hydraulic master cylinder for a bar handle vehicle according to claim 1, wherein a push rod is interposed between the piston and the knocker, and the knocker pushes the piston through the push rod. apparatus.
A hydraulic master cylinder attached to the handlebar; and an operation lever pivotally attached to a cylinder body of the hydraulic master cylinder. An adjustment bolt mounting portion provided on the operation lever is provided with the hydraulic master cylinder A grip provided on the front end side of the operation lever and the handle bar is formed by screwing an adjustment bolt that abuts on a piston or a push rod that pushes the piston so that the protrusion amount can be adjusted, and rotating the adjustment bolt. In the hydraulic master cylinder device for a bar handle vehicle that adjusts the grip margin formed between
The adjustment bolt is screwed into a female screw hole formed in the adjustment bolt mounting portion, and is screwed into the piston or the push rod so as to be adjustable in a protruding amount, and one end portion of the male screw portion. A contact portion that contacts the piston or the push rod, and a handle portion that is provided at the other end of the male screw portion. The handle portion includes a rotating shaft formed in a polygonal column shape, and the adjustment. An operation unit for rotating the bolt,
A spring member that is elastically pressed against the flat portion of the rotating shaft is attached to the adjustment bolt mounting portion, and the spring member is rotated from the first flat portion that is in pressure contact with the rotation of the rotating shaft. A hydraulic master cylinder device for a bar handle vehicle, wherein the hydraulic pressure master cylinder device for a bar handle vehicle is provided with a click feeling by overcoming a corner portion of a shaft and pressing against a second flat surface portion.
The adjustment bolt mounting portion is provided with a spring member mounting portion and a spring member latching portion facing each other with the female screw hole interposed therebetween,
The spring member is formed by bending an elastic wire, and includes a linear mounting portion that is attached to the spring member mounting portion, and an adjustment bolt that is screwed into the female screw hole from both ends of the mounting portion. A pair of spring pieces that extend across the rotary shaft and are in pressure contact with the flat portions facing the rotary shaft, and hooks that are provided at the tip portions of the spring pieces and are hooked on the spring member hooks. The hydraulic master cylinder device for a bar handle vehicle according to any one of claims 1 to 3, further comprising a stop piece.
Each of the pair of spring pieces is formed with a first curved portion that is convex in a direction approaching the center portion, and is convex in a direction away from each other on a proximal end side and a distal end side of the first curved portion. 5. The hydraulic master cylinder device for a bar handle vehicle according to claim 4, wherein two second bending portions are formed, and the first bending portions are in pressure contact with the flat portion, respectively.