DE202008005658U1 - Switch for a belt buckle - Google Patents

Abstract

switch for a buckle of restraint systems of motor vehicles to indicate that the belt tongue in the Belt buckle inserted and properly locked is, with two contact sheets in a housing with one Lid, with a contact plate towards the contact end as double contact tongues and the other contact plate hammer-shaped is formed, characterized in that the actuation the switching contacts (5 and 6) via a in the housing (1) rotatably mounted rocker (3), wherein the rocker (3) in such a way is formed, that the spring elements (12) and the actuating arm (10) disposed within the closed switch contact space are and the opening or closing of the switch contacts (5 and 6) on at least one outside the Switching contact space arranged arcuately formed Lever arm (14) through the slide (11).

Description

The The present invention relates to a switch operating in a buckle of Restraint systems in motor vehicles is used and the functional locking of the plugged into the buckle Tongue of the seat belt indicates.

Is known from the DE 43 38 485 A1 a set for fail-safe query seat belt buckle with micro-switch, wherein the microswitch is coupled with two locking parts of the lock independently involved functional parts such that the microswitch only at the two simultaneously standing in the locking position of the closure functions its closed and for the Triggering of further functional elements of the safety device established position occupies.

Is known from the DE 202 04 318 U1 a switch for a buckle of restraint system of motor vehicles to indicate that the belt tongue is inserted into the buckle and properly locked, with two contact plates with a contact plate is formed after its contact-end as a double contact tongue and these are arranged within the Gutschlosses, wherein the contact-making A contact plate are formed as a contact spring with a hammer-shaped portion at the contact end and a central arcuate portion and the arcuate portion of the contact spring protrudes into a laterally arranged from the housing interior channel and the Contact is switchable by moving a slider in the channel.

The Although contact areas of the switch are in a protected However, the area of the switch housing, but that has Housing to the channel towards an opening in the the arcuate portion of the contact spring protrudes. this is a Weak point of the switch, because of this opening Liquids or dust particles in the upper housing interior can penetrate.

Furthermore, from the US 6,002,325 a signal unit for the seat belt of seat belts known. It consists of a printed circuit board, which is equipped with electronic components and resilient contact plates for a switch. The circuit board is mounted in a housing which is mounted on the outer surface of the buckle. In the housing, a pivot lever is mounted on a pin which is rotated upon insertion of the belt tongue in the buckle by sliding an edge of the belt tongue on a sliding surface of the pivot lever against the action of a torsion spring in the contact space of the signal unit and switches the contacts.

There the insertion longitudinal movement of the belt tongue not directly for the switching of the contacts can be used, but over converted the pivot lever in a direction approximately perpendicular thereto must be, there is a risk of heavy wear the sliding surface on the pivot lever by possible Ridge on the sliding edge of the belt tongue during the lifetime, which may affect the switching function.

The Although contact zones of the contact plates are through the housing Protected from the ingress of dirt particles, however from above dripping liquids through the for the pivot lever in the housing existing opening preferably via the pivot lever in the contact zones be initiated, which can lead to contact errors.

A Fatigue of the torsion spring over the life and accumulation of dust. and liquids at the bearing point of the pivot lever and its consequent binding also hinder reliable switching of the contacts.

By the required use of the pivot lever and the torsion spring more expensive the switch.

By the assembly of the signal unit on an outer surface of the buckle, the space required for the buckle is increased. The tight fit of the signal unit on the buckle can through Climate, temperature and external mechanical stresses impaired become. There is also the risk of damage the relatively easily accessible from the outside pivot lever due to improper handling of the operator.

On The reason for the relatively complicated shape of the switching contacts is their automatic assembly on the PCB very difficult.

outgoing from the stated disadvantages and in appreciation of pointed prior art in Gurtschloßsystemen of the aforementioned type, therefore, the present invention Task underlying a switch for use within of the buckle housing in such a way, that the switching contacts are arranged in a separate room are and therefore against penetrating liquids and dirt particles are protected.

According to the invention the object is achieved by a switch for a buckle with the Merk paint of claim 1. Further embodiments and features can be found in the dependent claims and the following embodiment.

The Switching contacts are largely against penetrating liquid and dirt protected. For indirect operation the switch via a rotatably mounted rocker is a high contact force and a high restoring force of the rocker reached at the end of the actuation path without the Ejecting the slider when loosening the belt is hampered.

One unwanted switching back of the contact at complete end position of the slider is safely avoided. Due to the relative movement of the double contact points is a foreign layer influence kept low.

Furthermore the switch is designed so that a fully automatic Assembly is guaranteed.

Based An embodiment of the invention is intended to be closer be explained.

It demonstrate

1 : the switch according to the invention

2 : the switch with the slider of the buckle

3 : a three-dimensional representation of the contact elements The switch according to 1 is designed as an opener, consists of the switch housing 1 in that by means of a lid 15 above the terminal compartment 2 is closed.

The switch has an almost completely closed housing interior 4 on, in which the contact is made. In the lower part of the switch is a terminal compartment 2 intended. In this end the connections 7 of the fixed contact 5 and the contact spring 6 , These can be connected here with connection lines. The terminal compartment is open on both sides to allow the subsequent contacting.

The switch has a rocker 3 on, which at two campsites 8th is stored. This rocker has spring elements 12 , an actuating arm 10 and a lever arm 14 ( 2 ).

The contact spring 6 has a tongue 9 on which over the operating arm 10 the seesaw is located.

The contact spring 6 and the fixed contact 5 be through the lid 15 and the switch housing in the lower housing interior 4 fixed in position.

The contact spring 6 and the fixed contact 5 ( 3 ) are in the unactuated, contact state under a Biegevorspannung to ensure a defined contact force. This bending bias is caused by the bending shape of the contact parts, the position of the contact parts in the switch housing 1 and by the position fixing by switch housing 1 and the lid 15 guaranteed. Due to this bending prestress, the defined possible movement of the fixed contact 5 and the shape of the fixed contact 5 is a relative movement in the contact area 13 ensured.

The operation of the switch takes place when inserting the belt tongue in the buckle, by the lower part of the belt tongue on the slide 11 and this under the seesaw 3 pushes along. The upper edge of the slider 11 caused by the seesaw 3 through the lever arm 14 a rotational movement, which entails a change in position of the actuating arm after. This actuator arm raises the contact spring after a certain change in position 6 with the help of the tongue 10 from the fixed contact 5 off, the contact is disconnected and the switch signals the proper locking of the belt tongue in the buckle.

1

switch housing

2

connecting space

3

seesaw

4

Housing interior

5

fixed contact

6

contact spring

7

connections

8th

bearings

9

tongue

10

actuating arm

11

pusher

12

spring elements

13

contact area

14

lever arm

15

cover

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 4338485 A1 [0002]
• - DE 20204318 U1 [0003]
• - US 6002325 [0005]

Claims (7)

Switch for a buckle of restraint systems of motor vehicles to indicate that the belt tongue is inserted into the buckle and properly locked, with two contact plates in a housing with a lid, wherein a contact plate after the contact-making end as double contact tongues and the other contact plate is formed hammer-shaped , characterized in that the actuation of the switching contacts ( 5 and 6 ) via a housing ( 1 ) rotatably mounted rocker ( 3 ), wherein the rocker ( 3 ) is formed such that the spring elements ( 12 ) and the actuating arm ( 10 ) are arranged within the closed switch contact space and the opening or closing of the switch contacts ( 5 and 6 ) via at least one arranged outside the switch contact space arcuate lever arm ( 14 ) through the slider ( 11 ) he follows. Switch according to claim 1, characterized in that its shaft is parallel to the hammer-shaped part of the contact plate ( 6 ) is arranged and the rotatable rocker ( 3 ) is designed and arranged so that it is under force by the slider ( 11 ) acts in the direction of opening or closing and in a region of the switching contacts ( 5 and 6 ), which does not serve the contact. Switch according to Claims 1 and 2, characterized in that the rocker ( 3 ) at the depositories ( 8th ) is formed cylindrically and the associated recesses in the enclosing housing parts enclose the shaft with clearance. Switch according to Claims 1 to 3, characterized in that on the rocker ( 3 ) resilient, on a housing or Deckelinnenwandung supporting spring elements ( 12 ) are arranged. Switch according to Claims 1 to 4, characterized in that the spring elements ( 12 ) by a part of the rocker ( 3 ) are formed. Switch according to Claims 1 to 4, characterized in that the spring elements ( 12 ) separately on the rocker ( 3 ) are arranged. Switch according to Claims 1 to 6, characterized in that the spring elements ( 12 ) of the rocker ( 3 ) are so pronounced that an increase in the actuation path causes an increase of the torque.