DE8021914U1 - Switches, especially rotary switches - Google Patents

Description

Schutzapparate-Gesellschaft Paris + Co mbH KG, 5885 Schalkstnühle PB 1874 August 12, 1980

Switches, especially rotary switches

The innovation relates to a switch, in particular a rotary switch according to FIG the features of the preamble of claim 1.

As actuators for electrical switching devices are different Versions known, e.g .: rocker arms, rockers, push buttons or rotary knobs.

Such a switching device that uses a rotary knob drive, for example is known to switch a residual current circuit breaker on and off. The closing speed of the electrical contacts of this The switch depends on the speed at which the rotary knob is operated. If the switch-on movement occurs very much slowly, this results in undesirably high contact wear and thus a shortened service life of the switching device.

The innovation is based on the task of a rotary switch according to the preamble of protection claim 1 to improve the rotary knob drive so that it can also be used at a slow rotational speed of the actuator causes an increased closing speed of the electrical contacts, which is longer due to the low contact erosion Service life of the switchgear causes. Another aim is to find the simplest and most inexpensive design possible for such a rotary switch, which also does not require any intervention in an existing switching device.

This task is carried out through training corresponding to the characteristic Part of the protection claim 1 solved. Further refinements can be found in the subclaims.

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An embodiment of a rotary switch according to the innovation is there the drawing in five figures again. It shows:

- Fig. 1 - a longitudinal section through a newly designed according to Rotary switch,

- Fig. 2 - a plan view of the rotary switch in the starting position,

- Fig. 3 - a plan view according to Fig. 2 during a movement phase,

- Fig. 4 - a plan view according to FIG. 2 upon reaching the

highest switch-on resistance,

- Fig. 5 - a plan view of the rotary switch during

the reset phase.

f is seated in accordance with the exemplary embodiment according to FIGS. 1 to 5 the rotary switch on the axis 1 of an electrical switching device 2, only indicated in outline, and consists essentially of the rotary knob 3 and a housing 4 in which two springs 5 and 6 are connected | are ordered. The mode of operation of the rotary switch according to FIGS. 2 to 5 of the drawing is as follows: According to FIG. 2, the rotary switch is in the starting position zero. In this position, the spring 5, which is rotatably mounted on a pin 7, is held in the starting position by a further spring 6. If the rotary switch is turned by hand around the axis 1 clockwise by means of the rotary knob 3, the spring 5 with the leg 8 comes into operative connection with the housing-fixed stop pin 9 (Fig. 3) after a short switching path. From this position, the spring 5 is tensioned and thus the switch-on torque is continuously increased.

When the rotary knob is turned further, a position is finally reached in which the spring 5 reaches its maximum force (FIG. 4).

Immediately thereafter, the leg 8 of the spring 5 slides from the housing fixed Stop pin 9 off. The spring 5 relaxed and the

Switch-on resistance is suddenly reduced. That to overcome The torque to be provided by the spring force is therefore also available and causes an increase from this position on the switch-on speed. Finally, FIG. 5 shows the reverse sequence of movements. In this movement phase the Leg 8 of the spring 5 under the action of the relatively low restoring force of the spring 6 without additional forces acting on the stop pin 9 slide past and return to the starting position zero. The rotary switch is then for a new switching process positioned.

A rotary switch was made possible by the new device, in which as a result of the sudden reduction in the switch-on torque it is the switch-on speed in the contact egg contact phase of the switch-on process is significantly increased and thus a lower contact erosion combined with a prolonged Service life of the switching device is reached.

Claims (5)

Schutzapparate-Gesellschaft Paris + Co mbH KG, 5885 Schalksmühle PB 1874 August 12, 1980 Claims for protection 1. Switch, in particular rotary switch, with one of an actuator controlled device for increasing the switch-on speed of electrical switching devices, characterized in that, that the actuating member designed as a rotary knob (3) is in engagement with two springs (5 and 6), the spring (5) already at the beginning of the movement of the rotary knob (3) in a clockwise direction acts with its leg (8) on a housing-fixed stop pin (9) of the switchgear housing (2), whereby a tensioning of the spring (5) up to the maximum spring force can be brought about, and that after reaching the highest switch-on resistance the spring (5) of the legs (8) slides from the stop pin (9) fixed to the housing, and that this increases the switch-on resistance suddenly reduced, providing additional torque to increase the switch-on speed will. I * 2. Switch, in particular rotary switch according to claim 1, characterized in that that the spring (6) acts on the spring (5) to reset the rotary knob (3) in the starting position, whereby a return of the leg (8) of the spring (5) past the stop pin (9) fixed to the housing to the starting position is. 3. Switch, in particular rotary switch according to claim 1 and 2, characterized characterized in that the rotary knob (3) consists of insulating material and has a bore for receiving a switch device axis (1) is provided. 4. Switch, in particular rotary switch according to claim 1 to 3, characterized characterized in that the spring (5) is designed as a leg spring. 5. Switch, in particular rotary switch according to claim 1 to 4, characterized in that the spring (6) is a return spring .