CN101996783A

CN101996783A - Contact seal type stop lamp switch

Info

Publication number: CN101996783A
Application number: CN2010105105317A
Authority: CN
Inventors: 刘金涛; 曹雪峰; 沈颂龙
Original assignee: SAIC Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2010-10-19
Filing date: 2010-10-19
Publication date: 2011-03-30

Abstract

The invention discloses a stop lamp switch. The stop lamp switch comprises a switch shell (1), an ejector rod (2), a permanent magnet (3) and two reed pipes (4 and 7), wherein two groups of contacts (9 and 10) are packaged in the two reed pipes (4 and 7) respectively; the ejector rod (2) is extended out of the top end of the switch shell (1); the end of the ejector rod (2) in the switch shell (1) is connected with the permanent magnet (3); the two reed pipes (4 and 7) are parallel to the movement direction of the ejector rod (2) and crosswise arranged in the switch shell (1); and the ejector rod (2) moves to drive the permanent magnet (3) to act, so that the contacts (9 and 10) in the reed pipes (4 and 7) are alternately switched on and switched off. The switch contact acts flexibly and the response time can be controlled within 10ms; and the contacts are not oxidized and the voltage drop of the contacts is extremely small, so that the switch contact has very reliable performance and long life.

Description

A kind of contact closed type brake lamp switch

Technical field

The invention belongs to automotive field, particularly a kind of contact closed type brake lamp switch.

Background technology

At present the brake lamp switch that uses on the automobile is the hard contact switch of mechanical pressure, and the contact directly contacts extraneous air, and contact surface can be piled up the carbonic acid silicon that is generated by the silicon-containing gas composition in the car and the carbide that is generated by exhaust, foreign matter etc.Because of traditional line connection is that brake lamp switch directly drives left and right sides Brake lamp and high-mount brake lamp, so brake lamp switch is bigger by electric current, can destroy the insulator on switch contact surface during discharge, make that brake lamp switch can reliability service.But development along with automotive engineering, stop lamp generally adopts the LED illumination, and the driving of left and right sides stop lamp is realized by car body control module, make by the electric current of brake lamp switch less, can not effectively destroy the insulator on switch contact surface during the switch energising, thereby can produce the bad problem of switch conduction, traffic safety is caused great risk.

Summary of the invention

The present invention solves the problems referred to above by the brake lamp switch of developing the sealing of a kind of contact.

The invention discloses a kind of contact closed type brake lamp switch, it is characterized in that, comprise: switch housing, push rod, permanent magnet and two tongue tubes, two groups of contacts are encapsulated in respectively in two tongue tubes, push rod stretches out from the switch housing top, and the end of push rod in switch housing connects permanent magnet, and two tongue tubes and interlaced arrangement parallel with the push rod direction of motion is in switch housing, the action of push rod drives the permanent magnet action, makes that the contact in the tongue tube is alternately closed, disconnects.

Further, tongue tube comprises first tongue tube and second tongue tube, and wherein first tongue tube is relatively near the switch housing top.

Further, when described brake switch be contained on the brake pedal, when being positioned at initial position, push rod is subjected to the extruding of pedal, all stretches in the switch housing, this moment, permanent magnet shifted near second tongue tube, second closing of contact in second tongue tube.

Further, when stepping on brake pedal, push rod stretches out, and permanent magnet shifts near first tongue tube away from second tongue tube, and after the push rod activity extremely to a certain degree, second contact disconnects, first closing of contact in first tongue tube.

Further, also comprise spring, inner end cap and connector, spring vertically is placed on the inner end cap in switch housing, is used to support the push rod and the permanent magnet of its upper end, and inner end cap is fixed on the connector.

Further, connector and switch bottom head covers one link together by plastic buckle and switch housing.

Further, be full of inert gas in the tongue tube.

Further, the parallel direction of two tongue tubes dislocation distance is determined according to the requirement of two pairs of contact break-make strokes.

The present invention has the following advantages:

1, switch contact is active in one's movements, and the response time can be controlled in the 10ms;

2, the contact can oxidation, and the voltage drop of contact very little (caning be controlled in 0.1V), so the switch contact performance is very reliable;

3, switch life is long.

Description of drawings

Fig. 1: the switch schematic diagram of initial condition;

Fig. 2: the switch schematic diagram after the brake pedal action.

Fig. 3: the course of action schematic diagram of contact.

Description of reference numerals:

The 1-switch housing; The 2-push rod;

The 3-permanent magnet; 4-first tongue tube;

The 5-spring; The 6-inner end cap;

7-second tongue tube; The 8-connector;

9-first contact; 10-second contact;

11-contact reed.

Embodiment

Below in conjunction with accompanying drawing the present invention is specifically described.

As shown in Figure 1, brake lamp switch of the present invention comprises: switch housing 1, push rod 2, permanent magnet 3, two

tongue tubes

4,7, spring 5,

inner end cap

6 and 8, two groups of contacts of

connector

9,10 are encapsulated in respectively in two

tongue tubes

4,7 that are full of inert gas.Push rod 2 stretches out from switch housing top 1, push rod 2 is connecting in switch housing 1 inner end and is being used for the permanent magnet 3 of perceptual contact reed 11, two

tongue tube

4,7 interlaced arrangement, and two tongue tube orientations are all parallel with the external mandril direction of motion, and the parallel direction dislocation distance of two

tongue tubes

4,7 is determined according to the requirement of two pairs of contact break-make strokes.Spring 5 vertically is placed on the inner end cap 6 in switch housing 1, is used to support the push rod 2 and the permanent magnet 3 of its upper end.Inner end cap 6 is fixed on the connector 8.Connector 8 and switch bottom head covers one link together by plastic buckle and switch housing 1.

As depicted in figs. 1 and 2, switch actuator is made up of two groups of

contacts

9,10 and permanent magnet 3, when brake pedal moves, drive push rod 2 actions on the brake lamp switch, permanent magnet 3 actions then, make contact reed 11 alternating movements (course of action sees that Fig. 3 illustrates) in tongue tube 4 and the tongue tube 7, thereby realize effective output of brake switch signal.

The course of work:

See shown in Figure 1ly, when brake switch was contained on the brake pedal, the push rod 2 during initial position on the switch was subjected to the extruding of pedal, push rod 2 all stretches in the switch housing 1, this moment, permanent magnet 3 shifted near second tongue tube 7 (seeing shown in Figure 1), second contact, 10 closures, and this path switching signal inputs to the ECU module.When stepping on brake pedal, switch push rod 2 stretches out thereupon, permanent magnet 3 is away from second tongue tube 7, shift near first tongue tube 4, push rod 2 movable extremely to a certain degree backs (require to determine according to concrete switch on and off stroke, see Fig. 2), 10 disconnections of second contact, first contact, 9 closures, the switching signal of first contact 9 inputs to the control unit that Brake lamp, car body control module and ABS module etc. need brake signal.After brake pedal discharged, brake switch was also got back to initial condition.

Fig. 3 signal be the course of action of the wherein pair of contact in two pairs of

contacts

9 and 10, when magnet during away from the contact in the tongue tube, two contact positions of contact maintain the original state, and promptly are in the off-state among Fig. 3; When the contact in the close tongue tube of magnet, two contact reeds have magnetic under the effect in magnetic field, and the contact reed attracts each other and adhesive, promptly is in the closure state among Fig. 3.

Claims

1. contact closed type brake lamp switch, it is characterized in that, comprise: switch housing (1), push rod (2), permanent magnet (3) and two tongue tubes (4,7), two groups of contacts (9,10) be encapsulated in two tongue tubes (4 respectively, 7) in, push rod (2) stretches out from switch housing (1) top, the end of push rod (2) in switch housing (1) connects permanent magnet (3), two tongue tubes (4,7) parallel with push rod (1) direction of motion, and interlaced arrangement is in switch housing (1), the action of push rod (2) drives permanent magnet (3) action, makes tongue tube (4,7) Nei contact (9,10) be alternately closed, disconnect.

2. brake lamp switch according to claim 1 is characterized in that: tongue tube (4,7) comprises first tongue tube (4) and second tongue tube (7), and wherein first tongue tube (4) is relatively near switch housing (1) top.

3. brake lamp switch according to claim 2, it is characterized in that: when described brake switch be contained on the brake pedal, when being positioned at initial position, push rod (2) is subjected to the extruding of pedal, all stretch in the switch housing (1), permanent magnet this moment (3) shifts near second tongue tube (7), second contact (10) closure in second tongue tube (7).

4. brake lamp switch according to claim 3, it is characterized in that: when stepping on brake pedal, push rod (2) stretches out, permanent magnet (3) is away from second tongue tube (7), shift near first tongue tube (4), after push rod (2) activity extremely to a certain degree, second contact (10) disconnect, first contact (9) closure in first tongue tube (4).

5. according to each described brake lamp switch of claim 1-4, it is characterized in that: also comprise spring (5), inner end cap (6) and connector (8), spring (5) vertically is placed on the inner end cap (6) in switch housing (1), be used to support the push rod (2) and the permanent magnet (3) of its upper end, inner end cap (6) is fixed on the connector (8).

6. brake lamp switch according to claim 5 is characterized in that: connector (8) and switch bottom head covers one link together by plastic buckle and switch housing (1).

7. according to each described brake lamp switch of claim 1-6, it is characterized in that: tongue tube is full of inert gas in (4,7).

8. according to each described brake lamp switch of claim 1-7, it is characterized in that: the parallel direction dislocation distance of two tongue tubes (4,7) is determined according to the requirement of two pairs of contact break-make strokes.