KR20110133896A - Brake light switch - Google Patents

Abstract

PURPOSE: A brake light switch is provided to remarkably reduce failure by removing the inconvenience of adjusting and managing an assembling gap and reduce costs by reducing the number of parts. CONSTITUTION: A brake light switch(100) is as follows. A housing(110) is arranged on a master cylinder(200) and fluid pressure is supplied from the master cylinder. A driving unit(120) is arranged on the housing and operates depending on the fluid pressure supplied from the master cylinder. A contact unit(160) lights a lamp by the operation of the driving unit.

Description

Brake Light Switch {BRAKE LIGHT SWITCH}

The present invention relates to a brake light switch, and more particularly, to a brake light switch that is operated by the hydraulic flow of the master cylinder to generate a stable lighting signal.

In general, a brake device of a vehicle is a safety device that maintains a parking state while decelerating or stopping a vehicle while driving, and includes a wheel brake that brakes front and rear wheels for the purpose of decelerating or stopping while driving, and forming a brake hydraulic pressure. When the driver presses the brake pedal because the booster and the master cylinder are transmitted to the brake side, the hydraulic pressure generated in the master cylinder is transferred to the wheel brake to generate a braking force.

However, when the driver presses the brake pedal to control the braking force increase / hold state, if the braking pressure is greater than the road surface state, or if the friction force at the wheel brake generated by the braking pressure is greater than the braking force generated from the tire or road surface, the tire is on the road surface. Slipping occurs at the

Therefore, in recent years, to effectively prevent the slip phenomenon to exhibit a strong and stable braking force and to facilitate the operation, the anti-lock brake system (ABS) to prevent the slip of the wheel during braking, Brake Traction Control System (BTCS), which prevents excessive slippage of the drive wheel during sudden start or acceleration, and when the vehicle is not adjusted to the driver's will by external force during high speed driving of the vehicle. A brake hydraulic pressure control system has been developed with a vehicle dynamic control system (VDC) function that stably maintains the driving state by controlling the brake hydraulic pressure by combining an anti-lock brake system and traction control.

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

In this case, when VDC uses only BLS, the VDC ECU cannot check the disconnection when the BLS output is disconnected. Therefore, the BS signal opposite to the BLS signal is used to determine whether the BLS signal is normal.

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

That is, when the brake pedal is pressed as shown in FIG. 2, the output rod 60 is moved, and the BLS contact 21 and the BS contact 41 are moved by the contact plates (plate springs) 20 and 40. When the brake pedal is pressed, it is mechanically attached to the BLS contact 21 to be turned on, while the BS contact 41 is dropped to be turned off.

However, in the related art, the brake switch may be judged as a failure of the brake switch in the ABS system because the pressure delivered to the plunger master cylinder is less than ˜5 bar even when the driver presses the brake pedal and the brake switch is turned on. In order to meet the assembly tolerance of the brake pedal and the brake switch mounting bracket had a problem.

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 for improvement.

The present invention is created by the necessity as described above, by mounting the brake switch to the master cylinder to be operated by the hydraulic flow, it is possible to generate a stable lighting signal, significantly reducing the failure rate, reducing the number of parts cost It is an object of the present invention to provide a brake light switch for a vehicle that is reduced.

The brake light switch according to the present invention includes: a housing provided in the master cylinder and supplied with hydraulic pressure from the master cylinder, a drive unit provided in the housing and operated by the hydraulic pressure supplied from the master cylinder, and contacted by the operation of the driving unit to operate the lamp. It characterized in that it comprises a contact portion for turning on.

In addition, the driving unit is provided in the housing, and includes a support part which flows by the hydraulic pressure entering the housing, a deformation pad which is deformed in contact by the flow of the support part and a restoring member for supporting the support part in the housing. It is characterized by.

In addition, the support portion is characterized in that it comprises a support plate for sealing the inside of the housing in contact with the inner diameter of the housing and the pressing shaft is in contact with the deformation pad.

The contact part may include a first contact part provided in the housing and a second contact part selectively contacted with the first contact part by the operation of the driving part.

In addition, the second contact portion elastically supports the fixed terminal to which the power is applied from the outside, the flow terminal connected to the fixed terminal and moved up and down by the operation of the drive unit and the contact terminal and the fixed terminal selectively contacting the first contact portion elastically It characterized in that it comprises an elastic member.

As described above, the brake light switch according to the present invention, unlike the conventional invention, is mounted on the master cylinder to be operated by hydraulic flow, thereby generating a stable lighting signal to secure reliability.

In addition, by eliminating the conventional mechanical coupling, it is possible to eliminate the inconvenience of assembly gap adjustment and management, significantly reducing the failure rate, and has the effect of reducing the cost by reducing the number of parts.

1 is a schematic diagram showing the signal configuration of a BLS and a BS,
2 is a cross-sectional view showing a conventional brake light switch,
3 is a cross-sectional view showing a brake light switch according to an embodiment of the present invention;
Figure 4 is a cross-sectional view showing the operation of the 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, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

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

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

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 second piston which is built in the cylinder body 210 and moves in the same manner as the first piston 230 and the first piston 230 connected to the output rod 220. 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 communicating with the cylinder body 210 is transferred to the front and rear wheels, respectively.

The first spring 235 is elastically supported between the first piston 230 and the second piston 240, and the second spring 245 is supported between the cylinder body 210 and the second piston 240.

The first and second springs 235 and 245 are springs which return the first and second pistons 230 and 240 to their original state when the external force applied to the brake pedal is removed.

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

In addition, the driving unit 120 is provided in the housing 110 to operate according to the hydraulic pressure supplied from the master cylinder 200 to the housing 110 through the flow path 115.

The driving unit 120 is provided inside the housing 110, and is in contact with the support 130 that flows by the hydraulic pressure entering the housing 110 through the flow path 115 and the flow of the support 130. It includes a deformation pad 140 is deformed shape and the restoration member 150 for supporting the support 130 in the housing 110.

The support 130 is formed on the support plate 132 for sealing the inside of the housing 110 in contact with the inner diameter of the housing 110 and on the lower surface of the support plate 132 to contact the deformation pad 140 with the pressing shaft 134. It is made to include.

That is, the support plate 132 is in contact with the upper side surface inside the housing 110 to cover the flow path 115, the diameter is in contact with the inner diameter of the housing 110 to seal the inside. In addition, the pressing shaft 134 extends below the support plate 132 to be in contact with the deformation pad 140.

Therefore, when hydraulic pressure is supplied into the housing 110 through the flow path 115, the support plate 132 is pushed downward by the hydraulic pressure, and the pressure shaft 134 is deformed according to the flow of the support plate 132. The pad 140 is pressed.

The contact unit 160 is contacted by the operation of the driving unit 120 to light the lamp, and the first contact by the operation of the first contact unit 170 and the driving unit 120 provided inside the housing 110. And a second contact portion 180 selectively contacting the portion 170.

The second contact unit 180 is connected to the fixed terminal 182 and the fixed terminal 182 to which power is applied from the outside, and is moved up and down by the operation of the driving unit 120 to the first contact unit 170. It includes an elastic member 186 for elastically supporting the flow terminal 184 in the flow terminal 184 and the fixed terminal 182 to be selectively contacted.

The first contact portion 170 is fixedly formed on the bottom surface of the housing 110 spaced apart from the deformation pad 140 by a predetermined interval.

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

A fixed terminal 182 to which power is applied from the outside is formed on the inner surface of the receiving part 117, and the floating terminal 184 is elastically supported by the elastic member 186 on the fixed terminal 182.

The flow terminal 184 has a stepped portion 184a formed at the lower end thereof and is elastically supported by the elastic member 186, and is not separated out of the receiving part 117.

In addition, the flow terminal 184 is bent to one side, is formed in contact with the lower surface of the deformation pad 140.

Therefore, by the deformation of the deformation pad 140, the flow terminal 184, which is in contact with the bottom surface of the deformation pad 140, may flow to selectively contact the first contact portion 170, and may turn on a lamp according to the contact point. .

Hereinafter, with reference to the accompanying drawings will be described in detail the operating state of the brake light switch according to an embodiment of the present invention.

As shown in FIG. 4, when an external force is applied to the brake pedal, the output rod 220 moves forward, and the first and second pistons 230 and 240 move in the cylinder body 210 by the advance of the output rod 220. Is advanced in.

As the first and second pistons 230 and 240 are advanced, the oil in the cylinder body 210 is supplied into the housing 110 through the flow path 115.

When oil is supplied into the housing 110 through the flow path 115, the support plate 132 is pushed downward by hydraulic pressure, and the pressure shaft 134 is deformed by the flow of the support plate 132. The pressure 140 is deformed to protrude downward.

The flow terminal which is in contact with the bottom surface of the deformation pad 140 by the deformation pad 140 protruding downward is moved to be in contact with the first contact portion 170, so that power is supplied to the lamp and turned on.

Meanwhile, 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.

And, by the elastic force of the restoring member 150 supporting the support plate 132 is moved to the upper side of the housing 110, the pressing force of the pressing shaft 134 is removed, the deformation pad 140 Is restored to its original shape, and the first contact portion 170 and the flow terminal 184 are separated and separated.

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

As described above, the assembly is easy by screwing to the master cylinder of the housing.

In particular, it is possible to generate a stable lighting signal by being operated by the flow of hydraulic pressure supplied from the master cylinder irrespective of the invalid stroke generated by the conventional mechanical coupling.

In addition, there is no need to adjust and manage the assembly gap of the brake light switch when assembling the brake pedal, the master cylinder, and the booster, providing convenience, significantly reducing the failure rate, and integrating the master cylinder, thereby reducing the number of parts and reducing the cost. You can.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. I will understand.

Therefore, the true technical protection scope of the present invention will be defined by the claims.

100: brake light switch 110: housing
115: euro 117: receiving portion
120: drive portion 130: support portion
132: support plate 134: pressure shaft
140: deformation pad 150: restoring member
160: contact portion 170: first contact portion
180: second contact portion 182: fixed terminal
184: flow terminal 186: elastic member
200: master cylinder 210: cylinder body
220: output rod 220: first piston
235: first spring 240: second piston
245: second spring

Claims (5)

A housing provided in the master cylinder and supplied with hydraulic pressure from the master cylinder;
A driving unit provided in the housing and operated according to hydraulic pressure supplied from the master cylinder; And
Brake light switch, characterized in that it comprises a contact portion for contacting by the operation of the drive unit to turn on the lamp.
The method of claim 1,
The driving unit is provided in the housing, the support portion flows by the hydraulic pressure entered into the housing;
Deformation pad is deformed in contact by the flow of the support portion; And
And a restoring member supporting the support part in the housing.
The method of claim 2,
The support portion is in contact with the housing inner diameter to seal the inside of the housing plate; And
And a pressing shaft formed on a lower surface of the support plate and in contact with the deformation pad.
The method of claim 1,
The contact portion includes a first contact portion provided inside the housing; And
And a second contact portion selectively contacted with the first contact portion by operation of the driving unit.
The method of claim 4, wherein
The second contact portion is a fixed terminal to which power is applied from the outside;
A flow terminal connected to the fixed terminal and moved up and down by the operation of the driving unit to selectively contact the first contact unit; And
Brake light switch, characterized in that it comprises an elastic member for elastically supporting the flow terminal in the fixed terminal.

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