DE1086783B - Push button switch with locking rails that can be moved in their longitudinal direction - Google Patents

Description

The invention relates to a push button switch with several key sliders., the slanted surfaces, rigidly connected to the key slider Have cams behind which approaches of in their longitudinal direction when the key slide is pressed the sliding locking rails into place.

In known switches of this type, where only a locking bar is provided, there is the disadvantage that if the pawls are not precisely machined when you press a second slide switch, one is in the * on position and through Pressing the second key to trigger the slide switch is not triggered with certainty. To this one To avoid the disadvantage, both the distances between the key slide and the respective The spacing of the pawls must be exactly the same.

In order to ensure that the second key when pressed also with certainty the locked key slide triggers, it is already known in the case of pushbutton switches with only one locking bar on the pushbutton slides Provide expressions that have the effect that when the key slide is depressed, the locking bar is shifted by a greater amount than is absolutely necessary. This will surely fix the Switch-on position latched button triggered. It is only necessary that the key slide is pressed down a greater amount than it is should be the case for the latching itself. If such a key slide is only depressed so far that if the latching slot is at the level of the pawls, the pressed one latches Key slide without necessarily triggering the previously pressed key.

The shifting of the locking rail can therefore in such a case as a result of inaccurate processing and assembly are not sufficient to keep the in the on position to release located key slide. It can therefore happen that two or more The key slide can be brought into the locked switch-on position. Particularly when pressing down at the same time two or more key sliders, these are locked together in the on position.

In order to avoid this disadvantage, it has already been proposed that each key slide should have its own Allocate locking bar for its locking and each key slide with one of the number of the others Key slide to provide the appropriate number of unlocking cams, which are with those for the latching the other key slide decisive locking rails cooperate. Such an arrangement, which meets the requirements in every respect, but consists relatively of many individual parts.

The invention has now set itself the task of push button switches

with in their longitudinal direction

sliding locking rails

Applicant:

Continental electrical industry

Aktiengesellschaft Voigt & Haeffher,

Frankfurt / M., Hanauer Landstr. 142-172

Ludwig Kohl, book blades (Odenw.),
and Theodor Burkhard, Langen,
have been named as inventors

To create a switch where it is not possible to press several buttons at the same time. As soon as a key is switched on and any second key is now pressed, the key, which has already been locked in the switched-on position, is triggered before the second key is contacted. The switch according to the invention has few individual parts and has a very simple structure. According to the invention, each key slide is provided with two cams spaced apart in the longitudinal direction of the locking rails, which cooperate with two independently movable locking rails, the lugs of which are assigned to the individual cams of the key slide so that the approaches are brought into such a position when a key slide is pressed be that they one. Prevent depressing the remaining key slide and that when a key slide is depressed, this is triggered by pressing a second key slide. The two cams provided on the key slide are expediently attached to both sides of the key slide. As a result, the approaches on the locking rails can come to lie alternately on both sides of the key slide. The two locking rails are under the action of ¹ by two springs each, which seek to move the rails in opposite directions.

The switch according to the invention can also be provided with a zero key, which can be pressed down triggers the pressed key slide, so that none of the key slide is in the on position.

009 570/307

Claims (4)

3 4 In the drawing is; eiii: exemplary embodiment of the. derseiten arrangement of the cams 3 can also be the Invention shown. It shows approaches 20 and 21 of the rails 7 and 8 on both sides Fig. 1 the switch in the off position, partially the pushbutton slide 1, in section, The arrangement of the lugs 20 and 21 in the longitudinal Figure 2 shows a side view of the switch, also in the direction of the rails 7 and 8, is as follows. Under the partly in section, there is an image on each of the cams3 of the button 3 the switch while pressing a set 20 of the rail 8 and an approach 21 of the rail 7, Key, in such a way that approaches 20 and 21 when lowering Figure 4 the switch with the key turned on, press the key through the inclined surfaces 4 on the Figure 5 shows a top view of the switch, in which the io cams 3 are shifted to the left and right. Buttons of the key slide are omitted. can. The approaches are located under the B key The key sliders designated by 1 also bear in FIGS. 20 and 21 each under a cam 3. In the case of the Licher way, near the lower end of the key C , not shown, the lugs 20 and 21 are under a contact bridge and are only under the effect Arranged cams. Likewise, the approaches of a "spring, also not shown," pushes 15, 20 and 21 into the switch-off position, lying one above the other, only under a Nok key slide. In ken 3 of key D. Fig. 1 shows all the pushbutton switches in the switch-off The mode of operation of the switch is as follows. At the position drawn. With 2 is a so-called zero depression of a key 1, for example the keys, value key denotes that no .Kpntaktbrücke has the due to the inclined surface 4 on the cam 3 and only to control the locking rails, to 20 approach 20 of the rail 8 according to left and the approach 21 the purpose that all- key slide 1 out-. the rail 7 moves to the right. As long as both can be switched. The key slide 1 and rails 7 and 8 are shifted in such a way that a push is also necessary, the zero key 2 is provided with cams 3, the ken of the other keys not possible, since at least one inclined surface 4 each. Between each two an approach 20 or 21 of the rails 7 or 8 is located under cams 3 of a key slide, a cam 3 of the other keys 1 is located between. This memory space, which is denoted by 5. As is known, the design of the cams 3 already results in the key slides 1 in the switch base 6 when the key to be switched on is only moved by one, which in the exemplary embodiment is pressed down from several small amounts. The blocking of lined up segments exists. Each segment of the remaining keys A ₁ C, D is shown in Figure 3. In the case of the base 6 is used to guide a key 30 completely pressing the key B get the slide 1 and to support this Tasterischie- approaches 20 and 21 via the cams 3, so that the Anber 1 associated fixed contacts, which are shown in the drawing - Sets 20 and 21 and with them the rails 7 and 8 are not shown in detail. The individual segments, under the action of their springs, can be returned to their original position by means of screw bolts. This position is shown in Figure 4. They hold. * - _3g <p _aste _g j _{st now} (Ju _1x I ₁ <ji _e approaches 20 and 21 in the At the top of the base 6 there are two _; .. Switch-on position locked. If another locking rails 7 and 8, the key pressed independently of one another, for example key C, can be moved in their longitudinal direction. Both lugs 20 and 21 by the cam 3 according to this, the rail 8 slides on the right below it slides. As a result, the rail 7 assigned to the button B arrives. The rail 7 points. on both 40 associated approach 21 outside the area of the side a turn 9 (Fig. 1 and 3), on which cam 3, and also the button !? associated compression springs 10 and 11 are supported. This pressure approach 20 passes through the space 5 of the springs 10 and 11 rest with their other end on the button B. Through the base 6 arranged in the interior of the base., Both springs 10 and 11 each in one. The compression spring button B will now be located in the switch-off recess of the base 6. Likewise, 45 is pressed, since both lugs 20 and 21 outside also the upper rail 8: both ends of the bend area of the cams 3 are located. This Ausgen 12 on (picture 1 and 3), against the springs 13 and 14 switch button 2? occurs before the time at press. Both the springs 10 and 11 and the contacts of the key C with the fixed contact springs 13 and 14 are equally strong and try to come into contact. The same game is repeated on both rails 7 and 8, depending on the two directions 50, if, for example, the key is to be moved to the C key. The rails 7 and 8 therefore remain pressed. Then the key C is triggered, in a central position under the action of the springs the appendix 20 assigned to it moves to the right, which they occupy when all the pushbuttons are shifted and the appendix 21 assigned to it moves beyond 1 in the switched-off position or if a key slide 1 is switched on via the space 5 between the cams 3 on the left (Fig. 4). 55 arrives. The key C therefore jumps to the switch-off The rails 7 and 8 are held and led back position. by bracket 16, the ends 17 of which in lateral recess- So that all buttons are now switched off Iations of the base 6 engage. can, a zero key 2 is provided, which is not As can be seen from Figure 5, the rails 7 and 8 are provided with contacts, but only cam frame-like educated. Which has almost over the joints 3, which are used to move the rails 7 entire length of the rails 7 and 8 extending and 8 are used. By moving the rails Recess 18 serves for the passage of the key - the key pressed is then unlocked, slide 1. The upper rail 8 is inwardly with the recess 18 above approaches20 verse claims: hen. The lower rail 7 likewise has projections 21. 65 1. Pushbutton switch with multiple buttons Approaches 20 and 21 extend so far to the key. Sliders, which are provided with inclined surfaces, rigid see slide 1 so that the side is attached to this. cams connected to the key sliders th cam 3 are prevented from moving. have behind when you press the buttons As. Fig. 5 shows, the cams 3 on both sides of each slide are approaches from in their longitudinal direction Key slide 1 arranged. Snap into place in accordance with the 70 sliding locking rails, thereby indicates that each key slide (1) with two in the longitudinal direction of the locking rails at a distance mutually arranged cams (3) are provided with two independent of each other movable locking rails (7, 8) cooperate, the lugs (20, 21) of which the individual cams (3) the key slide (1) are assigned that while pressing a key slide (1) the approaches (20, 21) prevent depressing the remaining key slide (1) and in the ge ίο pressed state of a key slide (1) this by pressing a second key slide (1) is triggered. 2. Push button switch according to claim 1, characterized in that each key slide (1) is provided with two cams (3) on both sides. 3. Push button switch according to claim 1, characterized in that a zero key (2) is provided which triggers the pressed key slide (1) by pressing it down. 4. Push button switch according to claim 1 and 2, characterized in that both locking rails (7, 8) under the action of two springs each acting in opposite directions (10, 11 and 13:14). Considered publications:
U.S. Patent No. 2,740,004. 1 sheet of drawings © i 009 570/307 8.60