JPH0686240U - switch - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a switch used in various electronic devices, and an object thereof is to provide a switch having high reliability with respect to return of a lever. To achieve this object, in the switch of the present invention, the shaft portions 1a and 1b of the lever 1 are formed into a half-moon shape, and the contact portions of the lever shaft portions 1a and 1b and the coil portion 14a of the contact piece 14 are connected to the lever shaft portion. By locating on the lever operation side 1f from the line connecting the centers of the contact piece coil portions 14a with 1a and 1b, the push-up load A of the contact piece coil portion 14a is used as a rotation moment in the direction in which the lever returns, and the lever returns. It has a structure that enhances the reliability of.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a switch used in various electronic devices.

[0002]

[Prior art]

 A conventional technique will be described with reference to FIGS.

As shown in FIG. 1, 11 is a substantially box-shaped case having a rectangular opening 11a on the upper surface, and a pair of common terminals 12 and individual terminals 13 are arranged on the bottom surface 11b in the same plane as the bottom surface. A pair of holes 11e and 11f are formed at the upper end portions of the side walls 11c and 11d, and a rib 11h having a U-shaped cutout portion 11g in the direction of the opening from the bottom surface is formed substantially at the center of the bottom surface 11b. There is. Reference numeral 14 is a torsion coil spring-shaped contact piece made of a conductive material and having a connection function and a function for returning a lever 15 described later. One end of the coil portion 14a is a straight fixed end 14b and a fixed contact is provided at its tip. 14c is formed, and the other end has a movable end 14d formed in a U shape, and has a movable contact 14e at its tip. Reference numeral 15 is a lever made of an insulating material and formed in a substantially fan shape, and having a sealing function for covering the opening 11a of the case 11 and a switch operating function. The lever 15 is housed in the opening 11a of the case 11 and has a hole 11e in the case 11. , 11f are formed on the side surfaces 15c, 15d to form a pair of shafts 15a, 15b for rotational movement.

Next, the operation of the above embodiment will be described with reference to FIGS. 7 to 9. FIG. 7 is a view showing a release state of the lever 15. In this state, the lever 15 is moved by a restoring force of the contact piece 14 to a movable end. A clockwise rotation moment is applied about the shafts 15a and 15b via 14d, and the stopper portion 15e of the lever 15 is stationary with the side wall 11i of the case 11 biased. In this state, the movable contact 14e has a gap G apart from the individual terminal 13, and the fixed contact 14c is in contact with the common terminal 12. When the pushing operation F of the lever 15 is performed from this state to the state of FIG. 8, the movable end 14d of the contact piece 14 pushed by the bottom surface 15f of the lever 15 pivots counterclockwise around the coil portion 14a to move. The contact 14e comes into contact with the individual terminal 13 and the switch is turned on.

When the pushing operation F of the lever 15 is further continued from this state, the movable end 14d is rotated by the bottom surface 15f of the lever 15 while maintaining the state in which the movable contact 14e is in contact with the individual terminal 13. As shown in FIG. 9, when the bottom surface 15 f of the lever 15 contacts the rib 11 h of the case 11, the rotation operation of the lever 15 is completed. When the pushing operation of the lever 15 is released in this state, the lever 15 returns to the original release state shown in FIG. 7 by the restoring force of the contact piece 14.

[0006]

[Problems to be solved by the device]

 However, in the conventional switch described above, the rotating shafts 15a and 15b of the lever 15 and the contact portion D of the coil portion 14a of the contact piece 14 are on a straight line connecting the rotation center of the coil portion 14a and the rotation center of the lever shafts 15a and 15b. Therefore, the thrust load A formed by the restoring force of the contact piece 14 causes friction at the contact portion D, which hinders the rotational movement of the lever 15 around the shafts 15a and 15b, and the lever will return. There is a problem that the force B to be reduced decreases and the return of the lever 15 becomes insufficient.

The present invention solves such a conventional problem, and an object of the present invention is to provide a switch with excellent reliability in lever return.

[0008]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention is a case in which a torsion coil spring-shaped contact piece having a movable contact and a rotary shaft portion in which an action point of the contact piece that comes into contact with a coil portion is located on an operation side from a rotation center. It is composed of a lever supported by.

[0009]

[Action]

 According to the above invention, since the contact portion between the lever shaft portion and the contact piece coil portion is located on the operation side from the line connecting the rotation center of the lever shaft and the contact piece coil portion, When the lever returns, a push-up load from the coil of the contact piece gives a rotational moment in the direction that the lever returns, increasing the lever's return force and providing a switch with higher reliability for lever return. It is possible.

[0010]

【Example】

 An embodiment of the switch of the present invention will be described with reference to FIGS. The same parts as those of the prior art are designated by the same reference numerals, and the description will be omitted. When reference numeral 1 is made of an insulator, it is formed in a substantially fan shape, and has a sealing function for covering the opening 11a of the case 11 and a switch operating function. The lever 1 has a pair of rotary shafts 1a and 1b that are housed in the opening 11a of the case 11 and rotate about the holes 11e and 11f of the case 11 on the side surface of the lever 1. The rotary shafts 1a and 1b are half-moon shaped, and the upper circumferential portion 1g is supported by the case holes 11e and 11f during rotation of the lever 1, and the lower operation portion side end portion 1h is connected to the coil portion 14a of the contact piece 14. Abutting.

It is to be noted that the end portion 1h on the operation portion side is a position in which the elastic force of the contact piece 14 urges the end portion 1h in the clockwise direction even when the lever 1 is pressed as shown in FIG. It is set to be located on the operating side of the lever 1 with respect to the center of the shafts 1a and 1b, which are the rotation centers of the lever 1, so that the rotational moment for returning to the state is always the point of action.

Next, the operation of the above embodiment will be described. It should be noted that when the lever is pushed in, it is omitted because it is the same as the prior art, and only the lever return is explained.

When the pushing operation of the lever 1 is released in the state shown in FIG. 1, the movable end 14 d of the contact piece 14 is rotated in the clockwise direction, and the operation part bottom surface 1 f of the lever 1 is pushed up and the lever 1 is rotated. A clockwise rotation moment due to the thrust load A 1 is applied to the lower end 1h of the shaft 1a, 1b on the operating portion side, and the lever 1 is returned as shown in FIG.

[0014]

[Effect of device]

 According to the present invention, as is apparent from the above-described embodiment, the lever shaft portion is in contact with the contact piece coil portion on the operation side with respect to the rotation center of the shaft, so that the lever shaft portion is always in contact with the lever from pushing to releasing. The thrust load from one coil is applied to the lever shaft as a rotational moment, and the lever return force acts together with the return force applied to the lever operation part, so high reliability is obtained for lever return. is there.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment of a switch of the present invention in a state where a lever is pressed.

FIG. 2 is a side sectional view of the lever in a returned state.

FIG. 3 is a side view of a lever shaft portion, which is a main part of the same.

FIG. 4 is an exploded perspective view of a conventional switch.

FIG. 5 is a perspective view illustrating an internal structure of the case.

FIG. 6 is a perspective view illustrating a contact mechanism portion that is the same as the main portion.

FIG. 7 is a side sectional view of the lever in a non-pressed state for explaining the same operation.

FIG. 8 is a side sectional view when the switch is turned on.

FIG. 9 is a side sectional view showing a state in which the lever is pushed in.

[Explanation of symbols]

 1 Lever 1a, 1b Lever shaft part 1h Operation part side end part 11 Case 12 Common terminal 13 Individual terminal 14 Contact piece 14a Contact piece coil part

Claims (1)

[Scope of utility model registration request] 1. A substantially box-shaped case made of an insulating material and having an opening on the top surface, a pair of common terminals and individual terminals planted on the bottom surface of the case, and made of a conductive material and in contact with the common terminal at one end. It has a fixed contact and the other end is U-shaped,
A torsion coil spring-shaped contact piece having a movable contact point that contacts and separates from the individual terminal at its tip, and an action point of the contact piece that comes into contact with the coil portion are always located on the operation side with respect to the center of rotation. A switch composed of a lever supported by a case and configured to rotate and separate the individual terminal and the movable contact.