DE6937810U - ROTARY SWITCHES, IN PARTICULAR FOR VEHICLES. - Google Patents

Description

S ¥ F special factory for car accessories, Gustav Rau G.m.b.H., 7 ^ 2 Bietigheim

A 11 669.O724

pat / j / m

9/23/1969

Rotary switches, in particular for motor vehicles

The invention relates to a rotary switch, in particular for motor vehicles, with a rotatably mounted in the switch housing and a shift shaft carrying a shift member.

Depending on the configuration of the switching element of such a rotary switch, several switching positions are achieved, in which switch contacts are controlled. However, there are also versions of rotary switches known in a specific Angular range can be adjusted continuously. A constant change is made via the switching element, e.g. change in resistance carried out. Leave it both circuit variants of such well-known rotary switches combine with each other »

When using such rotary switches in motor vehicles, e.g. as a light switch, in many cases it is desirable to have a to be able to initiate additional switching function. For this, in the known systems in motor vehicles, separate Switch used.

It is the object of the invention to provide a rotary switch, in particular for motor vehicles, with one in the switch housing

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rotatably mounted and a SC ''. old link bearing shift shaft, to be modified so that without influencing the normal switching functions of the rotary switch regardless of the switching position of the rotary switch an additional switching criterion can be introduced. It should It also doesn't matter whether the switch positions of the rotary switch are changed in stages or continuously.

The rotary switch, especially for motor vehicles, with a in the switch housing rotatably mounted and a switching member carrying Sahaltwelle is characterized according to the invention characterized in that the end of the switching shaft in the switch housing, preferably in a hole in the rear wall of the housing, is rotatably mounted with play and that the switching shaft in the area of the front wall of the housing in a correspondingly designed Recording limited in a direction transverse to the longitudinal axis of the shift shaft and deflectable with an actuator is coupled for a contact arrangement which is separate from the switching element of the rotary switch. With this storage and deflection of the switching shaft is the switching function performed via the switching element of the rotary switch not influenced, but in each switch position of the rotary switch via the separate contact arrangement a independent switching function can be initiated.

So that this deflection of the switching shaft transversely to the longitudinal axis of the switching shaft does not lead to any jamming of the switch parts leads, it is provided according to one embodiment that the end of the selector shaft via a spherically arched leaf spring is set with axial play in the hole in the rear wall of the housing. The hole in the rear wall of the housing is included larger than the cross section of the stem end. Only in this way can the selector shaft in this bearing point be responsible for the deflection adopt the required angular division «

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The coupling between the switching shaft and the actuating member for the separate contact arrangement is designed so that the actuating member engages around the switching shaft in the area of the front wall of the housing like a fork and is supported on the switch housing via a compression spring. After the switching shaft has been deflected to actuate the additional contact arrangement, there is therefore an automatic return to normal celling. According to one embodiment of the invention, the compression spring is designed as a helical spring which is guided and held via a bearing pin of the actuating member .

A simple overall design for a rotary switch * with several switching positions is obtained in that the switching shaft as a switching element is one between two leaf springs guided switching cams for the switching positions of the rotary switch and a control cam for actuation of contact leaf springs of the switching contacts of the rotary switch carries.

The deflection of the switching shaft is selected in such a rotary switch controlled by cams that the Switching shaft in the direction of the equally aligned contact leaf spring ends of the switching contacts of the rotary switch is deflectable.

The additional contact arrangement of the new rotary switch is implemented with little effort by the fact that a part of the switch housing is designed as a mating contact for the contact arrangement, which is via the actuating member can be actuated by deflecting the switching shaft transversely to the longitudinal direction.

The invention is explained in more detail using an exemplary embodiment of a rotary switch shown in the drawings * explained.

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Show it

1 shows the longitudinal section through a rotary switch in the area of the switching shaft,
control an additional contact
can and about its switch positions
controls fixed switching contacts,
and

FIG. 2 shows a cross section through the rotary switch according to FIG. 1 along the line H-TI.

As the two centers of the scimitar can be recognized by the new rotary switch according to FIGS. 1 and 2, the end 11 of the switching shaft 10 is in a bore 1 ^ of the rear wall 15 of the housing
Game set. The end 11 of the selector shaft 10 has
has a smaller cross-section than hole 14. The
The end 11 of the switching shaft 10, which is guided through the opening 14 of the rear wall of the housing I5, is fixed on the outside of the housing by a washer I3 and a snap ring 12, while on the inside of the housing a spherically curved leaf spring 16 is supported on the switching element _{V 1 'fastened on the switching shaft 10 and} such an axial play the
Shift shaft 10 allows at this bearing point.

The front wall of the housing carries a receptacle 19 which allows the shift shaft 10 to be deflected in a direction transverse to the longitudinal axis of the shift shaft 10. The storage of the switching shaft end 11 makes this angular adjustment of the switching shaft 10, with the leaf spring 16 being more or less compressed. Enclosed in the area of the front wall of the housing
an actuating member 20 fork-like the switching shaft 10 so that it is moved along with a deflection of the switching shaft 10. This actuating member 20 takes on a coil spring 23 via the bearing pin 21, which is located on the housing part

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supports. During this movement, the actuating web 22 of the actuating member carries with it the contact spring 2k , which comes into contact with the housing part 18 designed as a mating contact. After releasing the switching shaft 10, the helical spring 23 returns the switching shaft 10, the actuating member 20 and the contact arrangement 18, 2k to the starting position shown.

It is now shown that this deflection of the switching shaft 10 does not affect the switching functions of the rotary switch when the separate contact arrangement 18, 2k is controlled. This is shown on the basis of a step-changeable rotary switch with switching contacts controlled by cams. As can be seen in particular from FIG. 2, the switching element 17 connected to the switching shaft 10 carries a switching cam 32 which has an approximately square cross section and is guided between two leaf springs 33 and $ k. This switching cam determines the switching positions of the rotary switch. In the exemplary embodiment, this results in four switch positions offset by 90 °.

The switching element 17 also carries a control cam 31t which controls the switching contacts arranged transversely to the side of the switching shaft 10. In the switching position shown, the control cam 31 lifts the contact leaf spring 37 straight from the counter contact 38. ^»s ° that this switch contact is open. If the control cam 31 is rotated further clockwise by 180 °, then the contact leaf spring 35 on the other side of the switching shaft 10 is deflected to such an extent that it comes into contact with the mating contact 36. This switching contact is then closed. The desired switching functions of the rotary switch can be determined by the design of the control box 3I and the switching contacts.

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The housing part 18 as a mating contact of the separate contact arrangement, which is controlled by the lateral deflection of the switching shaft 10, is connected to the switch housing 15 via hollow rivets 29 and 30. The movable contact spring 2k is connected to the housing 15 by a connecting piece 25 via the rivet 26. The contact leaf springs and mating contacts of the rotary switch switching contacts are also routed to corresponding connection pieces, as can be seen from the connection piece 28, which is fixed to the switch housing 15 via the rivet 27 »

When the switching shaft 10 is laterally deflected, the receptacle 19 in the front wall of the housing limits this movement. During this movement, the switching cam 32 is displaced in parallel between the two leaf springs 33 and? K without changing its switching position. The control cam 31 is also shifted between the two contact leaf springs 35 and 37. The deflection is directed in the direction of the free ends of these identically aligned contact leaf springs 35 and 37. This ensures that when the control cam 3I is deflected, the switch positions of the rotary switch switch contacts are not influenced either.

The additional contact from the contact spring 2k and the mating contact 18 can therefore be actuated in any switching position of the rotary switch without influencing the switching functions of the rotary switch. The receptacle 19 in the front wall of the housing allows the shift shaft 10 to be deflected only in the direction to _f in which the actuating member 20 is taken along.

Claims (1)

Il t ■ t SWF special factory for car accessories, Gustav Rau G.m.b.H., 712 Bietigheim A 11 669.0724 pat / j / m December 7, 1972 Protection claims 1. Rotary switch, especially for motor vehicles, with a a switching element carrying SchaltweJIe with its end in the switch housing, vorzugswei e in a hole in the housing rear wall, rotatably mounted with play and in the area the housing front wall can be deflected in a correspondingly designed receptacle in a direction transverse to its longitudinal axis and coupled to an actuating member for a contact arrangement which is separate from the switching member of the rotary switch is, characterized in that the end (11) of the selector shaft (1O) via a spherically arched leaf spring (16) with axial play in the hole (1 ^) in the rear wall of the housing (15) is set and that the actuating member (20) the switching shaft (1O) in the area of the front wall of the housing like a fork and is supported on the switch housing (18) via a compression spring (23). 2. Rotary switch according to claim 1, characterized in that the switching shaft (1O) as a switching element between two Leaf springs (33, 'Jh) guided switching cams (32) for the switching positions of the rotary switch and a control cam (31) for the actuation of contact leaf springs (35, 37) carries the switching contacts of the rotary switch. - 8 - A 11 669.072k 3 · Rotary switch according to claim 2, characterized in that the shaft (1O) in the direction of the co-aligned Contact leaf spring ends of the switch contacts of the rotary switch can be deflected. k » Rotary switch according to claim 1 to 3» characterized in that part (18) of the switch housing is designed as a mating contact for the contact arrangement (2 ^), which can be actuated via the actuating member (2θ) by deflecting the switching shaft (ΊΟ) transversely to the longitudinal direction is. 5. Rotary switch according to claim 1, characterized in that the compression spring (23) is designed as a helical spring which is guided over a bearing pin (21) of the actuating member (20) and is held.