DE1200919B - Push or slide switch - Google Patents

Description

Push or Slide Switches The present invention relates to a push or slide switch for at least two frequency ranges, especially for band switching and channel setting of televisions.

It is known in televisions to have a push button switch for switching from the VHF range to the UHF range, or vice versa, with the setting of the individual channels is done with special tuning buttons.

It is also known to use several, e.g. B. six push buttons to be provided, some of which, e.g. B. three, assigned to the VHF range and the other to the UHF range are. A tuning button is slidably and rotatably arranged in each key button, which protrudes from this when the button is pressed, so that by turning the same any channel of the selected frequency range can be set.

In order to get by with as few buttons as possible, the VHF area buttons in the switch unit are assigned an additional band switch lever in the last version. Depending on the position of this lever, which is neither accessible nor adjustable from the outside, either VHF band 1 or VHF band III can be switched on using a VHF button.

In contrast, the present invention is characterized in that at least one key button or a part attached to it is adjustable by at least a certain angle and this attached part has an actuating element which has a slide provided in the area of action of the actuating element, which carries out a switchover directly or indirectly, by running onto inclined edges of the slide depending on the position of the actuating element when the button is pressed to the left or right into the respective switch position.

Finally, it is also already known to arrange a bolt-shaped, radially protruding stop which engages in a recess of a flat slide on the slides carrying the key button. The edge of the recess that interacts with the stops is arranged at an angle, so that when the button is pressed, the flat slide is displaced laterally and a switchover can be made. The attacks shall in any but not attached to a rotatable key top part. In this case, too, no tuning in a frequency range is possible after a key has been pressed by a tuning button protruding from the key button.

This provides a push button switch that, when met allows a large number of switching functions to have a compact structure. aside from that the keystroke can be kept very small because the slide is not under the A spring is pretensioned and thus only the contact pressure and sliding friction of the slide must be overcome.

Further advantageous details of the invention are set out below Hand of the embodiments illustrated in the drawing described.

F i g. 1 shows an exemplary embodiment with inclined, rectilinear edges and FIG. 2 one with curved edges.

1, 2 and 3 rotatable or adjustable to at least two angular positions of adjustment parts are designated in each case one pressure or push button that is pushed onto a not attached to a slider 4 drawn pushbuttons block and is on this twist and / or slidable. Each setting part 1, 2, 3 has an actuating element 5. A flat slide 6 is movably arranged perpendicular to the direction of displacement of the pushbuttons and has approximately triangular or trapezoidal recesses 14 in the area of action of the actuating elements 5. Against one of the inclined edges 7 or 8 formed in this way , the actuating element 5 of each key can attack in any position regardless of the position of the flat slide 6 and actuate the flat slide 6 until the actuating element 5 has reached the base or the tip of the triangle. It can engage in an elongated recess 9.

A switching strip 11 with contacts 12 can be displaced on the flat slide 6 or coupled to it via a transmission element 10 and these can be connected to corresponding counter contacts 13 depending on the position of the flat slide 6 .

The base of the triangular recess 14 is to be selected to be at least twice as large as the tendon of the circular boa described by an actuating element 5. If keys are provided, the actuating elements 5 of which describe circular arcs of different sizes from one another, the base of all recesses 14 must be made twice as large as the largest chord.

Since the pushbuttons or pushbuttons are to be actuated against one or more spring forces, the spring force increases as the button stroke progresses, and thus the required button pressure. Since this is relatively small at the beginning, the edges 7, 8 are expediently designed to be curved in such a way that a greater force is initially required to move the flat slide 6 and the coupled contacts. This is achieved in that the steepness of the edges 7, 8 with respect to the direction of displacement of the flat slide 6 is initially small and increases in sections and / or continuously. As a result, a constant keystroke or at least an improvement in this regard can be achieved.

The invention is particularly applicable to push or slide key assemblies with tuning button 15 surrounded by the key button. This can be used to carry out a further switching process after pressing the key, in particular fine tuning or tuning of a variometer or rotary capacitor. The contacts 12, 13 are used, for. B. for the anode voltage circuit of the tubes of a VHF channel selector to that of the UHF tuner of a television set and for connecting or disconnecting additional inductances and / or capacitances to receive a different frequency range.

Furthermore, the key assembly can be designed so that after the key is pressed, the setting part or key part engages in the depressed position and the tuning button 15 returns to its position or otherwise protrudes from the button ( FIG. 1) or that the key goes into the Returns to the starting position and the tuning button protrudes even further beyond its rest position and protrudes beyond the key button or setting part (FIG. 2).

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Claims (2)

Claims: 1, push or slide switch for at least two frequency ranges, in particular for band switching and channel setting of television sets, characterized in that at least one key button or a part (1, 2, 3) attached to it can be adjusted by at least a certain angle and this attached Part (1, 2, 3) has an actuating element (5) which has a slide (6) provided in the area of action of the actuating element (5 ), which switches over, indirectly or directly, by running against inclined edges (7, 8) of the slide (6) depending on the position of the actuating element (5) when the button is pressed to the left or right into the respective switch position. 2. Push or slide button switch according to claim 1, characterized in that the edges (7, 8) extend such that the button is pressed. is constant or can be compensated for at different stroke. 3. Push or slide switch according to claim 1 or 2, characterized in that the edges (7, 8) form the sides of a triangle or trapezoid and the base of the triangle or the trapezoid is at least twice as large as that of the actuating elements ( 5) in the sliding direction of the slide (6) swept distance. 4. Push or slide switch according to claim 1 or the following, characterized in that the base of all recesses (14) is equal to twice the size of the distance desienigen actuating element (5) which covers the greatest distance. 5. Push or slide key switch according to claim 1 or the following, characterized in that the actuating elements (5) are provided as elevations extending perpendicular to the key slide direction, the parts of which cooperate with the edges (7, 8) are designed so that they are in the different layers touch the edges (7, 8) linearly. 6. Push or slide switch according to claim 1 or the following, characterized in that the setting part (1, 2, 3) rotatable and / or displaceable, for example pluggable, on a key block. 7. Push or slide switch according to claim 6, characterized in that a tuning button is provided within the setting part or parts (1 and / or 2 and / or 3) , which only after the button is pressed from the setting part (1 or 2 or 3 ) protrudes and can be operated from the outside. Considered pamphlets-. French patent specification No. 730 538.