DE1933665U - ARRANGEMENT FOR OPERATING ELECTRIC SWITCHES WITH TWO SWITCH SLIDES. - Google Patents

Description

RA050 M9 * 28.1.66

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TELEFUHKEN - Pat Entverwertungsge Seilschaft mbH Ulm / Donau, Elisabethenstr. 3 ' .___

485 July 12, 1965

FE / Pt-N-Hs / We

Arrangement for operating electrical switches with two Slide switches.

The present innovation relates to an arrangement for Actuation of electrical switches with two slide switches, from one of which has two and the other three defined switching positions, the first for switching over oscillating circuit elements for the reception of the TV areas VHF-Band I and Band III and UHF and the latter for connecting UHF input circuits to those of the VHF range or to switch them off.

With the innovation, this is done in such a way that the actuation of the holding slide is located on a common shaft Switching cams takes place, with two or three of the, respectively required, for the slide switch with three switching positions Shift travel correspondingly long socks and for the other a crouch is provided .. This makes it easy and it is possible to operate the slides in a certain order without great expense on complicated parts.

Further advantageous details of the hiring are given below described with reference to an embodiment illustrated in the drawing.

Fig. 1 shows a tuning unit for television sets with the according to the new arrangement,

Fig. 2 to 5 cLie different switch positions, 6 and 7 show another embodiment of a cam disk.

For example, 1 denotes a tuning unit of a television set, the tuning elements of which, for example, designed as a rotary capacitor 2, can be adjusted via a drive 3 from a drive shaft 4 through the button 5. The variable capacitors 2 are housed in a running UHF than \ / 4 ~ cavity resonators part 6, while the resonant circuits for VHF are provided in the other part. 7

About a slide switch 8, which by a compression spring 9 after is pressed on the outside, the inner circle conductors are optional Can be connected to ground (position I of the 3? ig. 2-5) and therefore effective as oscillating circuits or they are connected to the oscillating circuit elements for VHF -connectable (position II of Pig. 2 to 5) and then only form a low line inductance for this area,

The resonant circuit elements for VHF are connected to ground by a second slide switch 10, in position II 'resonant circuit elements for band I and in position III ¹ those for band III are switched on. At the same time, switching of the amplifier elements, e.g. B. transistors can be made.

On the drive shaft 4- is a hollow shaft 11 with an actuating wheel 12 is provided, via which a shift shaft 14 can be rotated, for example via a pair of gears 13. This can be done using a locking device, not shown, are held in different angular positions. Preferably, as with Embodiment, four east positions provided.

A slide 8 is located on the switching shaft 14 in the area of the stop Cam 15 and an eccentric disk 16 i.e. an eccentrically mounted one Ratchet wheel, provided, their maximum distances from the selector shaft 14- are in the same direction.

A rod 17 can slide over the eccentric disk 16 guided slide 18 can be actuated by means of two tabs 19 engaging on opposite sides of the eccentric disk.

The slide 18 has a pin 20 which is inserted into a hole of the Switch slide 10 engages.

When the actuating wheel 12 is actuated, the cam 15 and the ratchet wheel are brought into the positions shown in FIGS and the slide switches 8 and 10 are actuated. The switching positions and switching circuits shown are obtained.

If the slide switch 8 is in two positions by spring force pressed, e.g. by a snap spring, the actuation can be carried out similarly to the eccentric disk 16 via a defined Cam disk and a slide 18 with tabs 19 take place. When using a snap spring, the Form the cam and / or the slide 18 so that

the slide switch 8 can snap into the end positions. this will achieved through a corresponding game in the Bndpunkt.

Appropriately, according to! Ig. 6 and 7 of the slide 18 have a bolt 21 own, which is in a curve designed as a curve a disk 23 engages.

In this case, the slide switch 18 does not need a defined one To have end position, since it is guided into the corresponding positions by the curve in each case.

Claims (8)

_ 4 protection claims: PA®5 (ms * 2iiSS 1. Arrangement for actuating electrical switches with two slide switches, one of which has two and the other three defined switching positions, the first being used to switch oscillating circuit elements for the reception of the TV areas YHF band I and band III and UHF and the latter is used to connect UHF input circuits to those of the YHF range or to switch them off, characterized in that the switch slides (8, 10) are actuated via switch cams (15j 16) located on a common shaft (14-), whereby two or three cams corresponding to the required switching path are provided for the slide switch (10) with three switch positions (I ¹ , II ¹ , III ¹ ) and a crouch (15) is provided for the other. 2. Arrangement according to claim 1, characterized in that the switching shaft '(14 ·) has, for example, four locking positions and one for the slide switch (10) with the three switching positions (I ¹ , II ¹ , III ¹ ) instead of crouching Eccentric disc (16) is provided. 3. Arrangement according to claim 1 or 2, characterized in that the slide switch (10) with the e.g. three switch positions is coupled to the eccentric disk (16) via a parallel guide (18, 19). 4. Arrangement according to claim 1 or the following, characterized in that that the parallel guide from one on a pole (17) displaceable slide (18) with parallel surfaces (19), between which the eccentric disc (16) engages. 5. Arrangement according to claim 1 or the following, characterized in that the slide (18) has a pin (20), which engages in an opening of the slide switch (10). 6. Arrangement according to claim 1 or the following, characterized in that that the slide switch (8) for the two switching positions rests against the crouch (15) under gate voltage. 7. Arrangement according to claim 1 or the following, characterized in that that the or at least one slide switch (8) has two end positions via a snap-action mechanism and between the actuating curve and those interacting with it Parts in the area of the end positions there is sufficient play for the snap movement. 8. Arrangement according to claim 1 or the following, characterized in that that the "squat" or the eccentric disk is formed by a curve that has a groove (22) in a Disc (23) forms and a bolt (21) of the switching slide (8) engages in this groove (22).