JPH0319152Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a microswitch, and particularly to a microswitch equipped with a hinge lever type actuator.

[Background Art] A hinge lever type actuator has one end rotatably attached to a switch case, and the rotation pushes a push button to drive an internal contact mechanism. In the case of devices in which the actuator can be attached later, the actuator has conventionally been attached using the structure shown in FIG. 4 or 5. The switch shown in FIG. 4 has a recess formed in the upper surface of the switch case 1, which has a terminal 12 on the lower surface, a mounting hole 13 on the side surface, and a push button 11 on the upper surface, and a hole connected to this recess. 18 are provided on both sides, and a slit 25 is provided at one end of the actuator 2 to make it bifurcated, and a shaft portion 26 extending laterally is provided at each tip. The actuator 2 is mounted by placing one end of the actuator 2 in the recess and inserting each shaft portion 26 into the hole 18 of the switch case 1. Also,
The switch shown in FIG. 5 has recesses formed on both sides of the switch case 1, and a shaft 19 in the center of the recess.
A shaft hole 27 into which the shaft 19 is fitted is provided in a leg piece 21 extending from both sides of one end of the actuator 2.

In these, the actuator 2 can be easily attached, but in the former, if an external force is applied to the actuator 2 from the side, the portion divided into two by the slit 25 will be twisted, and the shaft portion 26 will come off. In addition, especially in small models, the strength of the part divided into two by the slit 25 is weak. When an external force is applied in the direction in which the free end of 2 is pulled up, a large force is applied to the shaft 19, which is formed as an integral molded product with the switch case 1, with point A in the figure serving as a fulcrum, and the shaft 19 It has the disadvantage of breaking.

[Purpose of the invention] The present invention was devised in view of the above points, and its purpose is to provide a microswitch in which the actuator can be easily attached and the attachment portion has high strength. .

[Disclosure of the invention] Accordingly, the present invention provides a recessed portion having a circular outer shape on both sides of the switch case, and also provides a groove portion that is continuous with the recessed portion and extends to the upper surface of the switch case where a push button is arranged at one end. A recess is formed on the top surface of the switch case, and the tip of the leg extending from both sides of one end of the actuator and disposed within the groove has an outer diameter larger than the width of the leg and rotates within the recess. The actuator is characterized by having a circular part that can be fitted freely, and a bent piece located in the recess at one end of the actuator, and the circular part at the end of the actuator leg fits into the circular part provided in the switch case The actuator is designed to act as a shaft that rotates within the recess, and the bent piece located within the recess restricts the lateral vibration of the actuator.

The present invention will be described in detail below based on the illustrated embodiment.A push button 11 for driving an internal contact mechanism is provided on the top surface of the switch case 1, which has a terminal 12 on the bottom surface and a mounting hole 13 on the side surface. The switch case 1 is placed at one end of this upper surface.
A recess 14 that opens also on the side end face is provided.
Furthermore, circular recesses 15 are provided in the upper portions of both sides of the switch case 1.
One end is connected to switch case 5, and the other end is connected to switch case 1.
A groove 16 reaching the top surface is provided, and an inclined surface 17 connecting the top and side surfaces of the switch case 1 is further provided along the groove 16.

The actuator 2 is formed of a metal plate, and has leg pieces 21 bent from both sides of one end thereof, and the tip of each leg piece 21 has an outer diameter larger than the width of the leg piece 21. A circular portion 22 is provided. Further, a bent piece 23 that is bent in the same direction as the leg portion 21 extends from one end of the actuator 2 .

However, in the case of this lever micro switch, the leg pieces 21, 21 of the actuator 2 are attached to the switch case 1 from above while being spread apart using their elasticity, the circular part 22 is fitted into the recess 15, and the leg piece 21 is attached to the switch case 1 from above. The bent piece 23 is positioned within the groove 16 and the bent piece 23 is positioned within the recess 14. In this way, the elasticity of the actuator 2 is used to attach the actuator 2. At this time, the circular part 22 and the leg piece 2
1 is an inclined surface 1 formed along the groove portion 16;
Because it is easy to expand with the presence of 7,
The actuator 2 can be installed even more easily.

In the microswitch configured as described above, the actuator 2 rotates as the circular portion 22 rotates within the recess 15, and an external force is applied to the actuator 2 from the side. However, since one side of each leg piece 21 and the circular part 22 is in contact with the side surface of the switch case 1, and the bent piece 23 is in contact with the wall surface of the recess 14 to resist external force, the actuator 2 will come off. In addition, there is no possibility that the leg piece 21 will break, and a force opposite to normal is applied to the actuator 2, causing the tip edge of the bent piece 23 to come into contact with the bottom surface of the recess 14. Even if a force with a point as a fulcrum is applied to the circular part 22, the outer peripheral edge of the circular part 22 only contacts the side wall of the recess 15, and there is no place where breakage will occur, and there is support from the side wall of the recess 15. Therefore, even if the above-mentioned force is applied, the circular portion 22 will not fall out of the recess 15.

[Effects of the invention] As described above, in the present invention, the actuator rotates by rotating the circular part at the tip of the leg within the circular recess, so the actuator rotates smoothly and the actuator Even if an external force is applied from the side, each leg piece and one side of the circular part are in contact with the side surface of the switch case, and the bent piece located in the recess provided in the switch case is in contact with the wall of the recess. Since it resists external forces from the side, the actuator will not come off or the legs will break, and furthermore, the actuator will not be subject to force in the opposite direction than usual. Even if a force is applied to the circular part using the contact point between the tip edge of the bent piece and the bottom of the recess as a fulcrum, there are places where breakage will occur simply by the outer peripheral edge of the circular part coming into contact with the side wall of the recess. Moreover, since it is supported by the side wall of the recess, even if the above force is applied, the circular part will not come out of the recess, and no matter the external force applied to the actuator in any direction, it will not come off or break. It has excellent strength and does not cause any damage.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is an exploded side view of the same, FIG. 3 is an exploded front view of the same, and FIGS. 4 and 5 are perspective views of conventional examples. ,
1 is a switch case, 2 is an actuator, 14 is a recess, 15 is a recess, 16 is a groove, 17 is an inclined surface,
21 is a leg piece, 22 is a circular part, and 23 is a bent piece.

Claims (1)

[Claims for Utility Model Registration] (1) A recess with a circular outer shape is provided on both sides of the switch case, and a groove is provided that is continuous with the recess and reaches the upper surface of the switch case with one end disposed with a push button, A recess is formed on the top surface of the switch case, and the tip of the leg extending from both sides of one end of the actuator and disposed within the groove has an outer diameter larger than the width of the leg and rotates within the recess. A microswitch comprising a circular part that can be freely fitted into the actuator, and a bent piece located in the recess at one end of the actuator. (2) The microswitch according to claim 1, which is provided with an inclined surface connecting the upper surface and the side surface of the switch case along the groove.