SU653633A1 - Push-button switch - Google Patents

Description

The invention relates to a pushbutton switch intended for switching AC and DC control circuits in various industries, in particular in the machine tool industry.

Known pushbutton switch containing a drive unit, a split housing of two mating parts, fixed contacts and spring-loaded moving contacts 1.

A disadvantage of the known construction is low manufacturability and assembly complexity.

The purpose of the invention is to improve manufacturability and simplify assembly.

This is achieved by the fact that the pushbutton switch is equipped with shutters, the form of execution of one matching body parts is identical to the other, moreover, said matching body parts are made with grooves into which the curtains are inserted, and with windows for accommodating fixed contacts, one ends of which are inserted into specified grooves and pursed curtains.

Fixed contacts are made with protrusions, and the associated housing parts

sockets to accommodate said protrusions.

FIG. 1 shows a general view of a button switch assembly (longitudinal section); in fig. 2 is a top view of a button switch assembly (with a local digging); in fig. 3 - part of the mating part of the housing (with local digging) and fixed contact; in fig. 4 - part of the mating housing part (with a local digging) c. fixed contact and shutter installed in it; in fig. 5 - traverse (with partial section) and movable mastic contact, spring and glass installed in it; in fig. 6 — drive unit and associated parts in assembly.

Claims (2)

A pushbutton switch contains (Fig. 1) a housing that is made of two similarly shaped detachable mating parts of housing 1. In the middle part of each part there are two tide 2 opposite each other, each of which contains two grooves 3 (Fig. 2 ). The fixed contacts 4 are inserted into the windows 5 of the housing part (Fig. 3) in the direction of the arrow. At the same time, the contact terminals 6 pass through the windows and are located outside the housing parts. The fixed contacts are superimposed on the plane 7 of the housing part (FIG. 3), the protrusions 8 of the contacts fit into the corresponding slots 9, prevent the fixed contacts from being pulled out or fall out through the windows, and the projections 10 of the fixed contacts pass through the slots 11 into the tides 3. With some force, the shutters 12 enter the grooves 3, while the protrusions 10 of the fixed contacts are pressed by the shutters against the surface 7 of the housing part. The fixed contacts are flush with the plane 13 of the housing part, and the silver contacts 14 welded to the fixed contacts protrude above this plane to their own height (Fig. 4). The outer conductors are fastened to the terminals 6 by screws 15. The cup 16 is installed in the opening 17 of the crosspiece 18. A spring 19 is inserted into the glass at one end, which is then compressed with the aid of a tool (screwdriver) inserted into the crosspiece window 20. The bridge contact 21 rotates in the direction of the arrow (so that its protrusions 22 can pass through the crosshead window) and the crosspiece is inserted into the window, after which the spring 19 is released and the bridge contact under its influence takes the position shown in FIG. 5. The protrusions 22 do not interfere with the movement of the bridge contact along the axis of the spring, while at the same time preventing the bridge contact from falling out of the traverse window. Between the tides of the hull parts, a prismatic guide 23 (Fig. 2) for the contact beam is made. A traverse with a return spring 24 is installed into the guides of the two mating body parts, which are interconnected by means of the curtains 12, which forcefully enter the grooves 3, into a single whole unit fastened to the power unit with two screws 25 that are secured from self-loosening spring washers 26, and from the fallout (during assembly) of the washers 27 worn on the screw 25 with some force and made of an easily deformable material (cardboard, rubber, plastic). The drive unit (Fig. 1) comprises a pusher 28 mounted in a waferless housing 29 in which a return spring 30 is located, somewhat stressed in the initial state. The pusher is prevented from falling out of the housing by a pin 31 installed in the slot of the pusher rod 32 and entering into the corresponding recess in the housing of the drive unit (Fig. 1). The pushbutton switch works as follows. When acting on the pusher 28, the latter pushes the pin 32 onto the yoke 18, compressing its return spring 24. The traverse moves all the way to the bottom of the part 1. At the same time, the bridge contacts 21 close the corresponding pair of previously open fixed contacts 4 and open a closed pair of fixed contacts. The contact pressure is carried out here by means of springs 19, which are compressed when the bridging contact 21 is evaporated into fixed contacts. When the force 18 is removed from the pusher 28, the yoke 18 returns to its initial position under the influence of the spring 24, the closure is open and the contact is closed, the contacts are closed (reverse switching). In the extreme positions (both in the forward and in the reverse course). The cross-slide 18 abuts against the details of the housing 1, pre-protection, thus, the springs 19 and the spring 24 are subjected to excessive unacceptable loads. The invention includes a pushbutton switch comprising a drive unit, a detachable housing of two mating parts, fixed contacts and spring-loaded movable contacts, which is 1 Ы, which, with the aim of improving manufacturability and simplifying the assembly, is equipped with flaps, the form of a single mating body part identical to the other, wherein said mating housing parts are made with grooves in which curtains are inserted, and with windows for accommodating fixed contacts therein, one ends of which are inserted into said grooves and tucked shut. 2. A pushbutton switch according to claim 1, characterized in that the fixed contacts are made with protrusions, and the mating housing parts with sockets for accommodating said protrusions in them. Sources of information taken into account in the examination 1. US patent number 3829633, cl. 200-16, 1974.