SU1415257A1 - Microswitch - Google Patents

Abstract

The invention relates to electrical engineering, in particular to switching devices. The purpose of the invention is to increase the wear resistance. The microswitch has a stop 5, the W-shaped contact spring 4, the middle lobe of which has a longitudinal groove. A screw 6 is inserted into this groove, which presses the abutment 5 with the contact spring 4 to the armature 7. The screw is fixed by turning the rectangular head 8 in the longitudinal groove of the abutment 5. At the bend point, the middle lobe of the contact spring has a smooth extension to create greater rigidity. As a result, the wear resistance of the device is increased. 1 hp f-ly, 5 ill. (L

Description

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6 FIG. 2

The invention relates to electrical engineering, in particular to switching devices.

The purpose of the invention is to increase the wear resistance.

FIG. 1 shows a microswitch with the position of the mechanism of instantaneous action in the initial position, side view; in fig. 2 - place of attachment of the stop with the middle lobe of the contact spring to the body fixture; in fig. 3 is a top view; in fig. 4 is a section A-A in FIG. 2; in fig. 5 is the same, section BB in FIG. 2

The switch contains a housing 1, in which fixed contacts 2 and 3 and an instantaneous mechanism are fixed, consisting of an W-shaped contact spring 4 and an emphasis 5, to the bottom surface of which the middle lobe of the contact spring is rigidly fixed after adjusting the required contact pressure. The contact spring is fixed in the housing of a torus; 1 n groove, which is made at the end of its middle lobe along the cylindrical part of the screw 6, which presses the stop with the contact spring to the armature 7 fixed in the housing I. From turning the screw with a fixed head 8 in the groove 9 5. The screw is fastened to the reinforcement 7 by a nut 10, with which the output terminal 11 is attached to the same armature from the outside of the housing 11. At the bend point, the middle lobe of the contact spring has a smooth extension to create greater rigidity. In case 1 ustapovlep drive element 12.

Microswitch works as follows.

Under the influence of external forces on the drive element 12, the latter exerts pressure on the middle lobe of the W-shaped contact spring. Average. IizioZS

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and when the neutral position passes, under the action of the forces created by the side and middle lobes, the moving contact fixed on the free end of the contact spring is transferred from one fixed contact 2 to another contact 3. When the external force is removed from the drive element the spring passes the neutral position in the opposite direction, which leads to an instantaneous transfer of the movable contact to the initial position.

Claims (2)

1. A microswitch comprising a housing, an abutment and an W-shaped contact spring, the end of the middle lobe of which has a slot for the fastening screw and is rigidly fixed to the stop by means of said fastening screw, characterized in that, in order to improve wear resistance, the end of the middle lobe The W-shaped contact spring is curved with an extension at the beginning of the bend, and its groove is of a longitudinal shape, while the W-shaped is contiguous n) dinner ystta {is so aligned that the end of the middle lobe covers the stop with a gap on the side of its end and drive Elemepa and fastened to the surface of the stop opposite to its surface opposite the drive element, using the specified fastening element. 2. The microswitch according to claim 1, characterized in that the stop is inserted with a longitudinal groove 1, and the fixing screw is used with a square head, which is placed in the longitudinal groove of the stop so that the pair,: 1, the edges of the head of the fastening screw touch the opposite walls of the longitudinal-11 (loops of the stop. V