KR101612277B1

KR101612277B1 - Brake light switch

Info

Publication number: KR101612277B1
Application number: KR1020100053548A
Authority: KR
Inventors: 이영권
Original assignee: 현대모비스 주식회사
Priority date: 2010-06-07
Filing date: 2010-06-07
Publication date: 2016-04-14
Also published as: KR20110133896A

Abstract

An invention for a brake light switch is disclosed. The disclosed brake light switch comprises: a housing provided in a master cylinder and supplied with a hydraulic pressure from a master cylinder; a contact portion which is contacted by operation of a driving portion and a driving portion provided in the housing and operated according to a hydraulic pressure supplied from the master cylinder, And the like.

Description

Brake light switch {BRAKE LIGHT SWITCH}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake light switch, and more particularly, to a brake light switch which is operated by hydraulic flow of a master cylinder to generate a stable lighting signal.

Generally, a braking device of a vehicle is a safety device that maintains a parking state while decelerating or stopping the vehicle while the vehicle is running. The braking device includes a wheel brake for braking front and rear wheels for deceleration or stopping while driving, When the driver presses the brake pedal, the hydraulic pressure generated in the master cylinder is transmitted to the wheel brake to generate the braking force.

However, if the braking pressure is larger than the road surface state while the driver depresses the brake pedal to control the braking force increase / maintenance state, or if the frictional force at the wheel brake generated by the braking pressure is greater than the braking force generated at the tire or the road surface, A slip phenomenon occurs.

Accordingly, in recent years, an anti-lock brake system (ABS: Anti-Lock Brake System) has been used to effectively prevent the slip phenomenon and to exhibit a strong and stable braking force and to facilitate the driving operation. A brake traction control system (BTCS) for preventing an excessive slip of the drive wheels during a sudden start or sudden acceleration of a vehicle, and a brake control device for controlling the vehicle when the vehicle is not adjusted to the driver's will by a force applied from the outside during high- A brake fluid pressure control system having a vehicle dynamic control system (VDC) function that stably maintains the running state of the vehicle by controlling the brake fluid pressure by combining an anti-lock brake system and traction control is being developed.

On the other hand, the brake pedal is provided with a brake light switch (BLS). 1 shows a signal configuration of a brake lamp switch (BLS) and a brake switch (BS). The VDC ECU receives a signal from the BLS to determine and control the driver's brake will (deceleration).

In this case, when the VDC uses only BLS, the VDC ECU can not confirm whether the BLS output line is disconnected. Therefore, in order to determine whether the BLS signal is normal, the BS signal opposite to the BLS signal is used.

At this time, the BLS is connected to the vehicle's own power source (battery B +) when the ignition key is subtracted, the BS is connected to the power source unit with the ignition key turned to IGN1, and the brake lamp BM is electrically connected to the BLS have.

2, when the brake pedal is depressed, the output rod 60 is moved, and the BLS contact 21 and the BS contact 41 are moved by the contact plates (leaf springs) 20 and 40 When the brake pedal is depressed, the BLS contact 21 is mechanically connected to turn on, while the BS contact 41 is turned off.

However, in the conventional brake switch, when the brake pedal is depressed by the driver, the pressure transmitted to the actual plunger master cylinder becomes less than ~ 5 bar even when the brake switch is turned on, so that the ABS system can be judged as a brake switch failure. There is a problem in that the assembly tolerance of the brake pedal and the brake switch mounting bracket must be matched.

The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

Therefore, there is a need to improve this.

The present invention has been made in view of the above-described need, and it is an object of the present invention to provide a brake control apparatus which can generate a stable lighting signal by mounting a brake switch on a master cylinder and operating by hydraulic flow, The present invention provides a brake light switch for a vehicle.

A brake light switch according to the present invention comprises: a housing which is provided in a master cylinder and is supplied with hydraulic pressure from a master cylinder; a contactor which is provided in the housing and is actuated by a driving part and a driving part operated according to a hydraulic pressure supplied from the master cylinder, And a contact portion which is turned on.

The driving unit may include a supporting part provided inside the housing and adapted to be driven by hydraulic pressure to enter into the housing, a deformation pad which is deformed in contact with the supporting part by the flow of the supporting part, and a restoring member for supporting the supporting part inside the housing. .

The support portion includes a support plate for sealing the inside of the housing in contact with the inner diameter of the housing, and a pressing shaft formed on the lower surface of the support plate and contacting the deforming pad.

The contact portion includes a first contact portion provided inside the housing and a second contact portion selectively contacting the first contact portion by operation of the driving portion.

The second contact portion includes a fixed terminal to which power is applied from the outside, a flow terminal which is connected to the fixed terminal and is moved up and down by the operation of the driving portion to selectively contact the first contact portion, And an elastic member for supporting the elastic member.

As described above, the brake light switch according to the present invention, unlike the prior art, is mounted on the master cylinder and is operated by the flow of the hydraulic pressure, so that the stable light signal can be generated and reliability can be ensured.

Further, by eliminating the conventional mechanical coupling, it is possible to eliminate the inconvenience of adjustment and management of the assembly clearance, remarkably reduce the failure rate, reduce the number of parts, and reduce the cost.

1 is a schematic diagram showing signal constructions of BLS and BS,
2 is a sectional view showing a conventional brake light switch,
3 is a sectional view showing a brake light switch according to an embodiment of the present invention,
4 is a cross-sectional view illustrating operation of a brake light switch according to an embodiment of the present invention.

Hereinafter, an embodiment of a brake light switch according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 3 is a sectional view showing a brake light switch according to an embodiment of the present invention, and FIG. 4 is a sectional view showing the operation of a brake light switch according to an embodiment of the present invention.

Referring to FIG. 3, the brake light switch 100 includes a housing 110, a driving unit 120, and a contact unit 160 according to an exemplary embodiment of the present invention.

The housing 110 is provided in the master cylinder 200, and the inflow is supplied from the master cylinder 200 by the operation of the brake pedal.

The housing 110 is screwed around the rear side of the master cylinder 200.

The master cylinder 200 includes a cylinder body 210 and a first piston 230 coupled to the output rod 220 and a second piston 220 mounted in the cylinder body 210 and operated in the same manner as the first piston 230. [ 240). That is, as the output rod 220 is advanced, the first piston 230 and the second piston 240 are advanced, and the oil supplied from the oil tank communicated with the cylinder body 210 is transmitted to the front and rear wheels, respectively.

A first spring 235 is elastically supported between the first piston 230 and the second piston 240 and a second spring 245 is mounted between the cylinder body 210 and the second piston 240.

The first and second springs 235 and 245 are springs that return the first and second pistons 230 and 240 to their initial states when an external force applied to the brake pedal is removed.

A front end of the housing 110 is formed with a passage 115 communicating with the inside of the master cylinder 200 so that the hydraulic pressure is supplied from the master cylinder 200.

The driving unit 120 is provided in the housing 110 and operated according to the hydraulic pressure supplied from the master cylinder 200 to the housing 110 through the oil line 115.

The driving part 120 is provided inside the housing 110 and is in contact with the supporting part 130 which is moved by the hydraulic pressure that enters the housing 110 through the flow path 115 by the flow of the supporting part 130 And a restoring member 150 for supporting the support 130 inside the housing 110. The deformable pad 140 may be deformed in shape.

The support part 130 includes a support plate 132 for sealing the inside of the housing 110 and an urging shaft 134 formed on the lower surface of the support plate 132 and contacting the deforming pad 140 in contact with the inner diameter of the housing 110 .

That is, the support plate 132 covers the flow path 115 in contact with the inner upper surface of the housing 110 and hermetically closes the inner surface of the housing 110 because the diameter thereof contacts the inner diameter of the housing 110. The pressing shaft 134 is in contact with the deforming pad 140 so as to extend under the supporting plate 132.

Therefore, when the hydraulic pressure is supplied to the interior of the housing 110 through the oil passage 115, the support plate 132 is pushed downward by the hydraulic pressure. As the support plate 132 flows, The pad 140 is pressed.

The contact part 160 is contacted by the operation of the driving part 120 to light the lamp and is operated by the first contact part 170 and the driving part 120 provided inside the housing 110, And a second contact part 180 which is in contact with the first part 170 selectively.

The second contact part 180 is connected to the fixed terminal 182 to which power is supplied from the outside and the fixed terminal 182 and is moved up and down by the operation of the driving part 120 to be connected to the first contact part 170 And a resilient member 186 elastically supporting the flow terminal 184 in the fixed terminal 182 and the flow terminal 184 selectively in contact therewith.

The first contact part 170 is fixed to the bottom surface of the housing 110 which is spaced apart from the deforming pad 140 by a predetermined distance.

The second contact portion 180 is accommodated in the receiving portion 117 formed on the bottom surface of the housing 110.

A fixed terminal 182 to which power is supplied from the outside is formed on the inner surface of the accommodating portion 117 and a flow terminal 184 which is elastically supported by the elastic member 186 is formed on the fixed terminal 182.

The flow terminal 184 has a step 184a at its lower end and is resiliently supported by the elastic member 186 and is not released to the outside of the receiving portion 117. [

The flow terminal 184 is bent to one side and is formed in contact with the lower surface of the deformable pad 140.

Accordingly, the flow terminal 184 contacting the lower surface of the deformable pad 140 due to the deformation of the deformable pad 140 flows and selectively contacts the first contact portion 170, and the lamp can be lighted according to the contact point .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an operating state of a brake light switch according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

4, when an external force is applied to the brake pedal, the output rod 220 is advanced, and the first and second pistons 230 and 240 are moved in the cylinder body 210 by the forward movement of the output rod 220, Lt; / RTI >

The oil in the cylinder body 210 is supplied into the housing 110 through the oil passage 115 by the advancement of the first and second pistons 230 and 240.

When the oil is supplied into the housing 110 through the oil passage 115, the support plate 132 is pushed down by the oil pressure. By the flow of the support plate 132, (140) so as to protrude downward.

The flow terminal contacting the lower surface of the deformation pad 140 is moved by the deformation pad 140 protruded downward and is contacted with the first contact part 170 so that the lamp is supplied with power and is lighted.

On the other hand, when the external force applied to the brake pedal is removed, the first and second pistons 230 and 240 are restored to their initial positions by the elastic force of the first and second springs 235 and 245.

The elastic force of the restoring member 150 supporting the support plate 132 moves the support plate 132 to the upper side of the housing 110 to remove the pressing force of the pressure applying shaft 134, The first contact part 170 and the floating terminal 184 are separated from each other and disconnected.

At this time, the flow terminal 184 corresponds to the deformation of the deformable pad 140 due to the elastic force of the elastic member 186 at the fixed terminal 182 formed in the receiving portion 117.

By screwing to the master cylinder of the housing as described above, assembly thereof is easy.

Particularly, it is operated by the flow of the hydraulic pressure supplied from the master cylinder so as to be irrelevant to the invalid stroke generated by the conventional mechanical coupling, so that a stable lighting signal can be generated.

In addition, since there is no need to adjust and control the assembly clearance of the brake light switch when assembling the brake pedal, master cylinder and booster, convenience is provided and the failure rate is significantly reduced and integrated into the master cylinder, thereby reducing the number of components and reducing the cost .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the true scope of protection of the present invention should be defined by the claims.

100: brake light switch 110: housing
115: flow path 117: accommodating portion
120: driving part 130:
132: support plate 134:
140: deforming pad 150: restoring member
160: contact part 170: first contact part
180: second contact portion 182: fixed terminal
184: floating terminal 186: elastic member
200: master cylinder 210: cylinder body
220: output load 220: first piston
235: first spring 240: second piston
245: second spring

Claims

And a contact portion provided in the master cylinder and supplied with hydraulic pressure from the master cylinder, a driving portion provided in the housing and operated in accordance with the hydraulic pressure supplied from the master cylinder, and a contact portion that is contacted by the operation of the driving portion to turn on the lamp and;
The driving unit includes: a support unit provided in the housing and adapted to be driven by hydraulic pressure to enter the housing;
A deforming pad which is deformed in contact with the support by the flow of the support; And
And a restoring member for supporting the support portion inside the housing;
The support portion includes a support plate for sealing the interior of the housing in contact with the inner diameter of the housing. And
And a pressing shaft formed on a lower surface of the support plate and contacting the deforming pad.

delete

The method according to claim 1,
The contact portion includes a first contact portion provided inside the housing; And
And a second contact portion selectively contacting the first contact portion by operation of the driving portion.

5. The method of claim 4,
The second contact portion includes a fixed terminal to which power is applied from the outside;
A floating terminal connected to the fixed terminal and moved up and down by the operation of the driving part to selectively contact the first contact part; And
And an elastic member for elastically supporting the flow terminal at the fixed terminal.