JPH0433612Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of the Invention This invention relates to a small switch such as one used as a micro switch, and more specifically to a switch suitable for connection with an external circuit.

(b) Background of the invention Conventionally, in this type of switch, as shown in FIG. 3, terminals 32 constituting a switch circuit are insert-molded in a switch case 31, and a switch cover 33 covers this circuit part. When the upwardly projecting push button 34 is pressed, an internal movable piece 35 is tilted to open and close the fixed contact portions 36, 36.

By the way, when installing such a switch on a panel etc., attach it to the panel by passing screws etc. into the case mounting holes 37, 37 opened in the switch case 31, and at the time of this installation, also connect the common terminal 32 side of the switch to the outside. When connecting to a terminal such as a ground terminal, wiring was done by soldering with a lead wire.

However, with this type of mounting structure, the number of man-hours required for installation is large, and due to the mounting structure, space is required to mount screws, wiring, etc., making it impossible to set the space for the mounting part to be small, which limits the miniaturization of the switch. Ta.

(c) Purpose of the invention Therefore, the purpose of this invention is to provide a switch that can reduce the number of man-hours required for installing the switch, and has efficient installation performance that can save wiring and space.

(d) Summary of the invention This invention is a switch in which a part of the terminal connected to the switch circuit is exposed to the switch mounting part of the switch case, and the exposed terminal part is mounted via a conductive mounting member. characterized by something.

(e) Effects of the invention According to this invention, an exposed terminal part in which a part of the terminal is exposed is provided in the switch case, and the switch is attached to this exposed terminal part via a conductive mounting member such as a screw. If the conductive mounting member is set to serve as both a ground terminal and a circuit connection terminal, the switch can be mounted and wired at the same time without providing a new terminal.

As a result, the number of component parts of the switch can be reduced, and the number of installation steps can be reduced, as well as eliminating the need for ground wiring work using a ground terminal or lead wire after installing the switch, resulting in wiring savings. , it is possible to save space in the switch mounting part, and based on these, it is possible to reduce the size of the switch.

(F) Embodiment of the invention An embodiment of the invention will be described below in detail based on the drawings.

The drawings show a small micro switch, and in FIGS. 1 and 2, this micro switch 1
1 is comprised of a switch base 12, a switch mechanism 13 formed on the upper surface of the base 12, and a switch cover 14 that covers the switch mechanism 13.

The above-mentioned switch base 12 is insert-molded so that the common terminal 15 and the other terminals 16 constituting the switch circuit extend vertically through the base 12, and a pair of left and right switch mounting holes 1 are provided on the side surfaces of the base 12.
7 and 17 are passed through, and these switch mounting holes 1
One of the terminals 7 and 17 corresponds to a screw mounting hole 18 opened in the middle part of the common terminal 15, and a terminal exposed portion 19 is formed in which the circumferential surface of this screw mounting hole 18 is exposed to the outside for conductive connection. It is set up in

This terminal exposed portion 19 is provided as a seat surface for locking the head 21 of the screw 20, and
The periphery is opened so that the head 21 of the screw 20 sinks into the switch mounting hole 17 when the switch is installed. Note that the switch mounting hole 17 on the other side is also provided with an opening around the periphery, and these screws 2
By restricting the head 21 of the switch 0 from protruding outward, the switch can be made thinner and the switch mounting portion can save space.

Then, switch mounting hole 1 on the common terminal 15 side
The screw 20 inserted through the terminal 7 is set to double as a terminal for circuit connection using a conductive screw. As an example of such a terminal, a conductive screw 20 is set to double as a ground terminal, and when this screw 20 is attached to a panel 22, etc., the screw 20 is connected to a ground external connection part (not shown) on the panel 22 side. be done.

In the switch mechanism 13 described above, one end of the movable piece 23 is horizontally locked to one end of the common terminal 15 protruding from the upper surface of the switch base 12 constituting the switch circuit. The end corresponds to the other terminal 16 protruding from the other side of the upper surface of the switch base 12, and usually the switch base 1
When the other end (free end) side of the movable piece 23 is urged upward by the urging force of the leaf spring 24 that is locked to the other side of the common terminal 15 protruding from the middle part of the upper surface of the movable piece 23, A push button 25 is in contact with the upper surface of the intermediate portion of the movable piece 23, and the push button 25 is allowed to move up and down by the switch cover 14.
It is supported by the switch cover 14 to prevent it from coming off.

Then, in conjunction with the pressing operation of the push button 25, the free end side of the movable piece 23 is moved downward, and based on this downward movement, the movable piece 23 comes into contact with the upper surface of the other terminal 16, and both terminals 15 , 16 are electrically connected,
When this depression is released, the cover returns to the upward movement position due to the return force of the leaf spring 24, and is operated to open and close. In the figure, reference numeral 26 indicates an upward movement regulating protrusion of the movable piece.

In order to cover these switch mechanisms 13,
Switch cover 14 is placed on the top surface of switch base 12.
is fitted.

The micro switch configured in this manner is connected to the panel 22 by passing the screws 20, 20 through the switch mounting holes 17, 17, so that the switch 11 is installed.

In this case, the screw 20 on the common terminal 15 side is conductive and is set to double as a ground terminal, so when this switch 11 is secured with the screw 20 and installed, the ground wiring is completed and the lead wire and soldering work is completed. This is a switch with excellent installation performance that requires very little installation work and does not require installation.

Furthermore, not only the wiring can be saved, but also the space of the switch mounting portion can be saved, and the switch can be further downsized.

Regarding the correspondence between this invention and the above-mentioned embodiment, the switch of this invention corresponds to the micro switch 11 of the embodiment, and similarly, the switch case corresponds to the switch base 12, and the switch circuit is as follows: The terminal corresponds to the switch mechanism 13, the terminal corresponds to the common terminal 15 and the other terminal 16, the switch mounting part corresponds to the switch mounting hole 17 and the screw mounting hole 18, and the terminal exposed part corresponds to the terminal exposed part. 19, and the conductive mounting member corresponds to the screw 20, but the present invention is not limited to the above-mentioned embodiment.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a vertical sectional view of the main part of the micro switch, Fig. 2 is a cross-sectional bottom view of the main part showing the installed state of the micro switch, and Fig. 3 is the main part of the conventional micro switch. FIG. 11...Micro switch, 12...Switch base, 13...Switch mechanism, 15...Common terminal, 16...Other terminals, 17...Switch mounting hole, 18...Screw mounting hole, 19...Terminal exposed part ,
20...Bis.

Claims (1)

[Scope of utility model registration request] A switch characterized in that a part of a terminal connected to a switch circuit is exposed to a switch mounting part of a switch case, and the exposed terminal exposed part is mounted via a conductive mounting member.