DE1002444B - Small self switch - Google Patents

Description

GERMAN

The invention relates to a small self-switch with a power button in which the power button is displaceable Switch-off button and thermal overcurrent and magnetic quick release, in which the Flexible strip carrying movable contact, under spring force in the disconnection direction the switch-on position by a pivotable locking lever rotatably fastened in the switch-on button is locked and in which the switch-on button is held in the switch-on position by a latch.

In such small circuit breakers, the transmission prepares the triggering movement of the push button and the magnetic release on the locking member of the switching element due to the low available standing room difficulties. These difficulties are thereby addressed in accordance with the invention overcome that the power button by means of the inclined plane attached to its underside directly acts on the upper extension of the pivotable locking lever.

According to a further characteristic of the invention, the acts laterally from the locking lever lying electromagnetic release on one arm of an angle lever, the other arm on the engages the lower end of the locking lever.

This training leads to a simple space-saving arrangement in which the Structure between the button or the magnetic trigger and the actual trigger part can be avoided.

The invention is explained below by way of example with reference to the drawing.

Fig. 1 is a perspective view of the type of miniature circuit breaker improved by the invention with the cover off;

2 and 3 show a vertical section through the actuating push button of the invention Self-switch in the switched-on position or during tripping,

FIGS. 4 and 5 are vertical sections along the lines 4-4 and 5-5, respectively, of FIG. 2;

Fig. 6 is a side view of the inner push button; H. of the release button, alone.

The switch has, as shown in Fig. 1 of the drawing, a movable contact 2 which is carried by a flexible strip 3 which is locked in the closed position by latching with a locking lever 4 carried by a push rod 5. A spring 6 acts on the flexible strip 3, and the push rod 5 is held in its lower position, ie in the closed position of the movable contact 2 and the fixed contact 7, by a pawl 8 on which a spring also acts. The triggering, i.e. the opening of the con-

Applicant:

Emile Andre Berthier, Villefranche
(France)

Representative: Dr. O. Lösenbeck, patent attorney,
ίο Bielefeld, Herford Str. 17

Claimed priority:
France 16 February 1953

Emile Andre Berthier, Villefranche (France),
has been named as the inventor

bars 2 and 7, takes place by bending a bimetal strip 9, which pushes the locking lever 4 back into its recess in the pressure rod 5, whereby the flexible strip 3 is released, which suddenly stretches and hits the free end of the pawl 8. This unlocks the push rod, which a spring 10 guides into the released position, with the locking lever 4 latching again at the same time to the flexible strip 3 carrying the movable contact 2.

According to the invention, the pressure rod 5 is provided with a longitudinal slot 12 in which the locking lever 4 is arranged (Fig. 2 and 3). This has a paragraph 13 to hold back the flexible strip 3 carrying movable contact. The lever 4 pivotable about an axis 14 is extended beyond this axis by an arm 15 which has a nose 16 at its free end forms. The Driuekstab 5 carries on its upper part a head with an axial bore, which the push button 17 for turning on the switch forms. In the cylindrical bore 18 of the push button 17 is a push button 19 for arbitrary Triggering the switch arranged displaceably. The inner push button 19 has a middle one bottom-facing bore 21 in which a helical spring 22 is received, which is on the one hand The bottom of the bore 21 is supported while, on the other hand, its fixed point of support through the bottom of the bore 18 of the outer push button 17 is formed. The spring 22 is therefore looking for the inner push button 19 to be raised in relation to the outer push button 17. The adjustments of the push button 19 opposite

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the push button 17 are limited incidentally by a cross bar 23, which with the outer Push button 17 is firmly connected and an elongated recess 24 in the inner push button 19 penetrates.

These parts are arranged and dimensioned so that the top 19 ^{a of} the push button 19 is at a level with that of the outer push button 17 and that between the bottom of the inner push button 19 and the bottom of the bore 18 of the outer push button 17 there is a space which corresponds to the adjustment of the inner push button required to trigger the switch. The inner push button 19 is provided on its upper side with a protruding part 19 *, the height of which is equal to the space mentioned. To bring about the triggering of the switch, the inner push button 19 has a recessed zone 25 in the extension of the slot 12 of the push rod 5, in which an inclined plane 26 is attached. The nose 16 of the arm 15 extending the lever 4 rests against this.

As is known, when the switch is switched on, the flexible strip 3 carrying the movable contact is held by the stop formed by the shoulder 13 of the lever 4, as shown in FIG. Furthermore, the switch is normally triggered by the bending of the bimetallic strip 9, which presses on the lower part of the lever 4 when an overcurrent passes through, which causes a pivoting movement of the same about the axis 14 and the release of the flexible strip 3.

In order to arbitrarily carry out the same triggering by hand, one only needs ^{to press the protruding part 19 O of} the inner push button 19 in the embodiment according to the invention. This pressure exerted in the direction of the arrow 27 in FIG. 2 causes the pivoting movement of the lever 4 about the axis 14 in the direction of the arrow 28 in FIG Part of the lever 4 is withdrawn into the slot 12 of the push rod 5, whereby the flexible strip 3 carrying the movable contact is released. This position is shown in FIG. 3.

To switch the switch back on, the two push buttons 17 and ^{19 must be pressed simultaneously using zone 19 a of} the push button 19.

In the described mode of operation of the switch it is assumed that the inner push button 19 acting spring 22 is weaker than the spring, which by the push rod 5 and, the push buttons 17 and 19 seeks to raise the arrangement formed.

The automatic and quick release of the switch in the event of strong overcurrents is provided by the coil causes which sits on the base of the switch below the push rod 5 and the lever 4. Of the Plunger core 31 of this coil has a head 32, which has an arm of a pivotable about an axis 34 Holds angle lever 33, the other arm of which is opposite the lower part of the lever 4.

In the event of an overcurrent, the coil 29 attracts the plunger core 31, which controls the pivoting movement of the lever 33 by the Axis 34 in the direction of arrow 35 of FIG. 5 causes. The free arm of the lever 33 adjusts the Lever 4, which, when pivoting about axis 11, triggers the switch as above.

Claims (2)

Patent claims: 1. Small self-switch with on-button and off-button that can be slid in the on-button, in which one carries the moving contact, under spring force in the disconnection direction Standing flexible strip in the switch-on position can be rotated by one in the switch-on button attached pivotable locking lever is locked and in which the power button is held in the switched-on position by a pawl, characterized in that the switch-off button (19) by means of the inclined plane (26) attached to its underside directly 'the upper extension (15) of the pivotable locking lever (4) acts. 2. Small self-switch according to claim 1, characterized in that the side of the locking lever (4) lying electromagnetic release (29 to 32) on one arm of an angle lever (33) acts, the other arm engages the lower end of the locking lever (4). Considered publications:
German Patent Nos. 874171, 842 082, 583, 681 282. 1 sheet of drawings © 609 770/312 2.57