FI75447B - ELEKTRISK STROEMSTAELLARE. - Google Patents

Description

1 75447 Electrical switch

The invention relates to an electrical switch having fixed contact parts and at least one bridge-contacted bridge contact part controlled by a housing.

In known switches of the above-mentioned nature (US-PS 2,672,536), the bridge contact parts are supported in the button windows by spring slicing and pressed in the direction of movement of the button against fixed contact parts. When using such clutches, relatively large movement and high thrust are generally required. It is an object of the present invention to improve the electrical switch mentioned at the beginning in the direction that with a small movement of the spring a small steering force is required to maintain a good contact force. This is achieved in a simple manner by guiding the bridge contact portion in grooves in the direction of movement of the bridge contact portion behind the button so that a button movement transverse to the contact pressure direction of the bridge contact portion causes the bridge contact portion 20 to rise from the fixed contacts. The transfer of contact force via the button to the bridge contact parts is possible in a simple manner when the button slides on an inclined plane and is spring-loaded against this inclined plane. Especially for the auxiliary pole in load-disconnection switches, it is advantageous if the bridge contact parts are roller contact parts. Thus, low transition resistances are also achieved. In this case, it is advantageous if the roller contact parts in the closed position are in the rest position in the button. A simple implementation of the spring force load is achieved when the spring load is formed by at least one coil spring which engages around a bolt arm, the end of which, when shaped like a caliper, slides on a button. In view of the low control force, it has proved advantageous if the electrical switch can be used as an extension switch in connection with a button-operated Basic Switch.

35 The drawing illustrates the embodiment of the invention and its mode of operation in more detail.

2 75447

The figures show: Fig. 1 a top view of a switch according to the invention, Fig. 2 a sectional view in line II-II and Fig. 3 a second sectional view in line III-III.

The circuit breaker shown in the drawing is formed by a housing 1 with fixed contact parts 2 and 3, which can be brought into a conductive connection by means of a bridge contact part 4 formed in a roll. The bridge contact part 4 is controlled by the control link 5 of the button 6. The grooves or channels 7 10 of the housing 1 act to guide the bridge contact part 4 transversely to the longitudinal direction of the fixed contact parts 2 and 3, i.e. in the direction of movement of the bridge contact part. The button itself rests on the surface 8 at an oblique level 9 in the housing 1. The shoulder is acted upon by a coil spring 11 guided on the bolt 10, which rests on the bottom 12 of the opening 13 in the housing

In the drawing, the switch is drawn in the closed position. 20, if the button 6 is pressed in the direction of the arrow 16 for controlling the switch, the button slide surface inclined at 8 to 9; the head 14 slides on the slide path 17 of the button 6, and the coil spring 11 is frozen. The bridge contact part 4 slides out of the rest recess 15 and is guided in the guide back 25 5 so as to be pushed away from the fixed contact parts 2, 3 in the groove 7 so that the bridge contact part 4 is so far from the fixed contact parts 2 and 3 that the required separation is reached. If the button 6 is left free, it slides to the position 30 shown in Fig. 2 by moving back at an oblique level 9 and the contacts are closed again. Because only the shoulder of the button 6 protrudes from the housing 1, the switch according to the invention can be connected to an arbitrary switch, which is controlled by longitudinal movement. Due to the conversion of the contact force, the control force 35 is relatively small in the oblique plane and the movement of the spring can also be considered small. At the same time, the contact pressure spring 11 acts as a back pressure spring for the button 6. The installation of the switch is relatively simple, since the button should only be applied to the housing after the spring has been placed on the bolt. For this purpose, the projections 18 function, as seen in Figure 1. In this way, it is possible to implement the housing in one piece.

Claims (6)

Electrical switch with fixed contact parts and at least one bridge-operated bridge contact part controlled by a housing, characterized in that the bridge contact part (4) is guided in grooves (7) in the direction of movement and in the button control link (5) so transversely of the bridge contact part ( 4) the movement of the button (6) in the direction of contact pressure causes the bridge contact part (4) to rise away from the fixed contact parts (2, 3). Switch according to Claim 1, characterized in that the button (6) slides on an inclined plane (9) and is loaded by a spring against the inclined plane. Coupling according to Claim 1 or 2, characterized in that the spring load is provided by at least one helical spring (11) around the arm of the bolt (10), the end (14) of which is shaped like a recess and slides on the button (6). . Switch according to Claim 1, 2 or 3, characterized in that the bridge contact parts (4) are roller contact parts. 4 75447 A switch according to claim 4, characterized in that; Make sure that the roller contact parts (4) in the · · closed position are in the rest position on the button. Switch according to one of the preceding claims, characterized in that the housing (1) is integral. p 11