DE1590208C - Double push button for switching on and off with buttons arranged within a circular overall cross-section - Google Patents

Description

40

The invention relates to a Dop.pelrp.riackknop /, both of which are used to switch an electrical circuit on or off, a work process or the like. Serving buttons within a circular Total cross-section are arranged.

In known double snap fasteners of this type (Swiss patent specification 306 168, British patent specification 495 643) is a push button with a circular cylindrical cross-section intended for switching on slidable in the bore of the other tubular pushbutton provided for switching off stored, which in turn is movably supported in its axial direction. The "at" actuation a break contact 'opening the switch-off pushbutton or the switch-on pushbutton that closes one of the normally open contacts is activated after stopping the actuating force is returned to its outer starting position by a spring.

The disadvantage of the known double push buttons is that the central switch on push button must have a considerable diameter and still be served with special care must be in order to prevent simultaneous actuation of the switch-off button surrounding it, and that furthermore the push buttons themselves do not have any optical signaling effect for the switching status of the with the system controlled by double push buttons. The area of application is therefore essentially limited on contactor controls, where a safe switch-off is important and the operating status, for example by separate indicator lights.

Are also known (German Patent 700 140) multiple push buttons with a number of concentrically arranged ring-shaped individual buttons, each of which has a working contact cooperates. Apart from the very large space requirement, the targeted actuation one of the. ring-shaped buttons even more difficult than with the well-known concentric double push buttons.

The object of the invention is to create a double push button that is easy to manufacture and can be mounted, largely eliminates incorrect operation and enables the switch position to be displayed.

This task is achieved, based on a double push button of the type mentioned achieved that the buttons, of which the switch-off button sipft in a known manner to unlock the when switched on, the switch-on button automatically locked in its switch-on position is used, for example Have semicircular cross-section and the power button, the outer end face of the Ausaltknppfes protrudes with a lateral protrusion, and that the switch-off button opposite the Has switch button greater actuation.

A double snap fastener designed in this way is due to its few, easy-to-design components easy to manufacture and requires only a simple one for its attachment, for example in a control panel Round hole of relatively small diameter, with the on and off pushbuttons for the operator clearly distinguishable and easy to operate, as well as the current switch position is easily recognizable. The double push button according to the invention is particularly advantageous in electrical switches can be used.

The switch-off button advantageously engages with a lateral extension in the outer end region of a Recess of the power button and it is common to both f ^ ruckkrjöpferi, in the recess arranged and assigned to the approach acting return spring. This design becomes only a minimum of parts, for example only a single return spring for both push buttons, is required.

In a further development of the invention, the switch-on button advantageously a locking member penetrated by the approach in an opening, and a The release lever, which can be actuated by the “Äüsschaltknopf”, is at a distance from the inner end of the Aussphaltknopfes on who the hub. of the locking quality in the locking position of the power button.

An exemplary embodiment of the invention is shown in the drawing and is described in more detail below.

In the drawing shows

F i g. 1 shows an axial section through the double push button,

F i g. 2 shows a plan view of the double push button according to FIG. 1,

F i g. 3 shows a cross section along the line III-III in Fig. 1 and

F i g. 4 shows a cross section according to the line IV-IV in Fi g. 1.

As shown in the drawings, the double push button contains two independent ones Buttons 1 and 2. It is assumed below that these buttons turn on and off, respectively control a switch, the button 1 remains pressed after switching on and after is released again after switching off.

The two buttons 1 and 2 are attached side by side and have a circular overall cross-section on. They are slidably mounted in a fastening tube 3 which has an external thread and is connected to the switch housing.

A rod 4 engages with a horizontally bent end 4 a in a recess 5 of the power button 1. This rod is connected to the lock of the switch so that it is switched on when button 1 is pressed in the direction of arrow 6. A fixed stop 7 limits the pushing in of the button 1 either directly or with the aid of the rod 4.

The top 2 α of the button 2 is under a projection 1 α of the button 1. In addition, there is a release lever 8 in the path of movement of the button 2, which is at least the same distance from the lower part of this button as the stroke that the button 1 can perform.

The button 2 has an extension piece 2 b which protrudes through an opening Aa of the rod 4 and is displaceable in a recess 1 b of the button 1. This extension piece 2 Zj has on its lower part a projection 2 c which guides a return spring 9 which is supported against a stationary stop 10. This spring ensures that the button 2 remains pressed against the button 1 either with its surface 2 a or its extension piece 2 b.

To attach the switch to a control panel 11, a single hole is drilled into it, the Tube 3 inserted and a nut 12 screwed onto this tube.

To switch on the device, it is sufficient for the operator to press button 1; at No mistake is possible with this activity, as buttons 1 and 2 are different heights. The button 2 is moved at the same time as button 1, but does not reach the release lever 8.

After the switch has been switched on, button 1 is locked in its depressed position, since the rod 4 is locked in a manner known per se and holds the button in place. The depressed position of the button indicates to the operator that the switch is on.

To switch off the button 2 is pressed according to the arrow 13 and thereby the lever 8 in motion set. After the device is switched off, the rod 4 is released and the spring 9 brings the return two buttons 1 and 2 to their rest position.

1 sheet of drawings

Claims (3)

Patent claims: 1. Double push button, both of which can be inserted or Switching off an electrical circuit, a work process or the like. Serving buttons are arranged within a circular overall cross-section, characterized in that the buttons (1, 2), of which the switch-off button (2) in a manner known per se to unlock the automatically when switched on In its switched-on position, the switch-on button (1) is locked, each having an "approximately semicircular cross-section mid the switch-on button (1 ) protrudes over the outer face (2a) of the switch-off button (2) 'with a lateral projection ( 1a) , and that the The switch-off button (2) has a greater actuation path than the switch-on button (1). 2. Push button according to claim 1, characterized in that the switch-off button (2 ) engages with a lateral projection (2 b) in the outer end region of a recess (1 b) of the switch-on button · (1) and two push buttons a common one in the recess (1 b) arranged and on the approach (2b) engaging return spring (9) is assigned. 3. A push button according to claims 1 and 2, characterized in that the Einschaitknopf (1) having a (b 2) from the attachment in an opening (4 a) interspersed locking member (4) and actuated by the Ausschaltknppf (2) Auslö _r sehebel (8) has a distance from the inner end of the switch-off button (2) which exceeds the stroke of the locking member (4) in the lock ?, r position of the switch-on button (1).