Push-button switch


H01H3/12 - Push-buttons
H01H13/18 - adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift

 

The invention relates to electrical engineering and can be used in fluids under pressure as a position sensor, a displacement sensor or limit the electric switch. The switch includes a spring-loaded plunger that includes a button-shaped glass and the guide portion in the form of a rod. Button switch provided inside the housing flange, the area of the larger plane which is equal to the area of the outer surface of the bottom buttons. There is a seal of elastic material, one of which is in the form of a cuff seals the button from the outside, and the other flange of the button and the contact within the housing cavity. Mechanical result - the effect of unloading button that allows to automate the control or management of the processes in a confined space with a fluid conductive medium under variable in a wide range of pressure, as well as ensuring the performance of the breaker in a considerable range of movement of the external pressure device and simplifying the setting of the switch. 1 C.p. f-crystals, 3 ill.

The invention relates to electrical engineering and can find application in engineering systems, the position sensor, the displacement sensor or limit the electric switch.

Known electrical switch, comprising a housing with external thread, dip, plug, stem with the plunger and return spring. The microswitch is installed in the threaded sleeve, the protrusion of the plunger set screw with the groove limiting the movement of the rod in the plunger and the stem seal is made in the form of a rubber tip, covering the groove of the rod (see and.with. The USSR №1723594, IPC5N 01 N 13/18, publ. 30.03.92. Bull. No. 12).

Closest to the claimed push-button switch is a push-button switch having a housing, in which holes in the Central of which is placed a guide part of the drive with the trailer, reciprocating movement between a source and a work position, inside the body is placed contacts off the device. The body is made hollow insulating material with a Central through hole and the holes on the side (see RF patent №2031467, IPC6H 01 H 3/12, publ. 20.03.95. Bull. No. 8).

A common shortcoming of these devices is the inability to use them in a confined space with a conductive fluid with the device from the actuator, affecting the stock or the button device is limited by the magnitude of the force P, since it is impossible to find the stiffness of the return spring rod or button, ensuring stable operation of the device under these conditions.

The problem solved by the claimed invention is the development of a push button switch working in a confined space with a conductive fluid medium (liquid or gaseous) under variable in a wide range of pressure q, the pressure device of the actuator acting on the button of the switch is limited by the magnitude of the force R.

The technical result that can be obtained through use of the inventive push-button switch is in the automatic control or management processes in a confined space with a conductive fluid medium (liquid or gaseous) under variable in a wide range of pressure q.

The mentioned technical problem is solved by using a push button switch that contains a spring-loaded plunger that is arranged to close the electrical circuit that includes a button-shaped glass and the guide portion in the form of stock, making longitudinal reciprocating polnym through hole and the holes on the side, in the Central through-hole inside the housing has contact.

Unlike the prototype of the proposed switch button (actuator) is provided inside the housing flange, the area of the larger plane which is equal to the area of the outer surface of the bottom buttons. In addition, the switch installed seal of elastic material, one of which is in the form of a cuff seals the button with the outer side of the adjusting device of the actuator), and the other flange of the button and the contact within the housing cavity.

In the Central through-hole inside the housing from the base can be made the guide cylinder, inside of which is placed in contact and the rod, the spring-loaded contact along the longitudinal axis of the housing and is made in the form of a cylinder with flanges limiting its movement along the guide cylinder coaxial to the stem.

Sealed switch provides access to the fluid only to the bottom from the outside and to a greater plane of the flange of the button. In case of equality of the areas of these parts of the button in terms of the impact on it of any largest static or dynamic pressure of the external fluid are equal and peligroso button. To move the buttons need a little effort on the part of the adjusting device of the actuator, which would be enough to overcome the resistance of sealing gaskets and springs that hold the switch in the normally open condition.

When performing a push button switch in accordance with the set of features additional claim serviceability of the circuit breaker in a significant range of movement pressing the button of the device and simplifies the configuration of the switch.

The invention is illustrated by drawings.

In Fig.1 depicts the inventive push-button switch in the context in the source normally open condition.

In Fig.2 depicts the inventive push-button switch in a section in the working position.

In Fig.3 shows a diagram of impact-button switch of the external fluid medium.

Push-button switch is placed inside a vessel 1 with a conductive fluid medium under pressure q, and contains a spring-loaded by a spring 4, the pusher including a key 3 in the form of a glass connected with the guide part in the form of a rod 15, is arranged to close the electrical circuit control or contrs electrically conductive material and is connected by flexible conductors 14 to terminal 13. In another implementation (see Fig.2) on the rod 15 may be installed plate-contact 22 connected to terminal 13 of the flexible conductors 14.

The housing 8 of insulating material with an internal cavity 7 has a Central through hole 17 and the holes 6 on the side surface.

Inside the housing 8, in the Central through hole 17, with the base made the guide cylinder 20, which has a movable spring-loaded by a spring 10, a cylindrical pin 9 with flanges connected by flexible conductors 11 to terminal 12.

The plunger, reciprocating motion between a source and a work provisions, closes an electrical circuit by coming into contact with the biasing spring 10 pin 9.

The rod 15 passes inside the guide cylinder 20 and inside the movable contact 9 and separated from it by an insulator 16. The pin 9 has a free course, determined by the difference between its flanges and the wall thickness of the guide cylinder 20 of the housing 8 of the switch in which the moving contact 9. This design of the spring contact 9 ensures the operability of the switch in a wide range of movement of the adjusting device 2 associated with the Executive mechanismo 0 the outer surface of the bottom 21 of the button 3 is equal to the area S1more plane 23 (see Fig.3) of the flange (S0=S1).

Seal of elastic material set to one in the form of cuff 5 and seals the button 3 from the outside, and the other 18 seals the flange 19 of the button and the contact 9 inside the housing 8 in such a way as not to interfere with the reciprocating movement of the pusher.

The switch works as follows. The case of the switch is fixed on the wall of the vessel 1. The switch due to the spring 4 is independent from the pressure value of q in the vessel 1 in a normally open condition (see Fig.1) because the equality of the areas (S1=S0) flange 23 and the bottom 21 of the parts of the button equalizes the forces acting on the 3-side of her bottom and the flange parts in opposite directions S0q=S1q (see Fig.3), i.e., is the hopper bottom silos button switch. Button 3 under the influence of the force P from the pressure device 2 on the bottom part 21 compresses the spring 4 and causes the plunger into contact with the contact 9, closing thus the electrical circuit. In this state, the button can move somestr from the pressure device 2 button 3 under the influence of the spring 4 is moved to its original state, displays the plunger out of contact with the contact 9 is opened, the electrical circuit (see Fig.1).

The use of the inventive push-button switch will allow for automatic control or management processes in a confined space with a conductive fluid medium (liquid or gaseous) under variable in a wide range of pressure.

Claims

1. Push-button switch that contains a spring-loaded plunger that is arranged to close the electrical circuit that includes a button-shaped glass and the guide portion in the form of stock, making a longitudinal reciprocating motion between a source and a work provisions, the hollow body of insulating material with a Central through hole and the holes on the side, a contact mounted in the Central hole inside the housing, wherein the button has a flange located inside the area of the outer surface of the bottom of the button equal to the area of greater plane of the flange, there is a seal of elastic material, one of which is in the form of a cuff seals the button from the outside, and the other flange through the hole inside the housing from the base made the guide cylinder, inside of which is placed in contact and the rod, the spring-loaded contact along the longitudinal axis of the housing and is made in the form of a cylinder with flanges limiting its movement along the guide cylinder coaxial to the rod.

 

Same patents:

The invention relates to disconnect the node with the contact bridge breaker comprising accommodated in the housing and designed for each pole movable contact bridge cooperating with fixed contacts, and the tension spring contacts, and the bridge operates an effort in the direction of the spring, the button that is attached to the mechanism for opening and closing contacts

Push-button switch // 2031467
The invention relates to electrical engineering and can find application in the control device of electronic equipment

The invention relates to electro-contact technique, namely, devices switching circuits products, such as spacecraft

The electric switch // 2187164
The invention relates to electrical engineering, in particular to devices for switching electrical circuits, and can be used as a switch signal vehicle braking

FIELD: electricity.

SUBSTANCE: there is a contact switch with the switching push bar (11), the supporting plate (10) and the switching body (12) for the switching push bar (11) placement. In this switching push bar, the switching body (12) is set removable towards the supporting plate (10). At a minimum one catch mechanism (24) of the supporting plate is prescribed at least on one edge lip (26) of the supporting plate in this contact switch. At the least one switching body catch mechanism (19) is prescribed on the switching body (12) in such a way that the supporting plate (10) can be fixed with the switching body (12) at a minimum at two different levels.

EFFECT: manufacture and usage simplification.

15 cl, 9 dwg

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