JPH051864Y2 - - Google Patents

Description

[Detailed explanation of the invention] Recently, in the mounting process of printed circuit boards, assembling various electrical equipment, devices, etc., manufacturing process, etc., certain circuits are left open (or closed) until a certain point, and at a certain point, With the circuit closed (or open),
Since then, there has been an increasing need for switches that maintain the closed (or open) state without the need to open and close the circuit at all times, except for special needs such as repairs. There is one.

The leaf switch of the present invention has been developed in view of the above-mentioned needs, and is a leaf switch that can achieve the above-mentioned objectives with an extremely simple configuration.

That is, to explain the configuration of the leaf switch of the present invention with reference to its embodiments, a leaf switch of an arbitrary configuration is formed by embedding a plurality of contact spring pieces approximately parallel to each other in an insulating base 1 (embedding them by insert molding processing of plastic). In the switch, an engaging portion 3 is formed in the pusher 2 which is buried near the tip of the movable contact spring piece A (embedded by molding at the same time as the insulating base 1), and the movable contact spring piece A
An elastic engagement claw 4 (insulating) is appropriately provided in a protruding position at a position facing the engagement portion 3 in the recurving direction in which the pusher 2 is bent by the pressing operation of the pusher 2. When the contact a of the movable contact spring piece A and the contact b of the fixed contact spring piece B are closed by the pressing operation (i.e., in a normally open type switch (Fig. 1),
In conjunction with the operation of closing the normally open contacts a and b) or opening (that is, opening the normally closed contacts a and b in a normally closed switch (Fig. 2)),
An elastic engagement pawl 4 is engaged with the engagement portion 3, thereby maintaining the closed or open state of the contacts a and b.

In the above, the elastic engagement pawl 4 is integrally formed (insulated) on the insulating base 1 in the recurving direction by the pressing of the presser 2 of the movable contact spring piece A, as shown in the first and second figures, for example. Simultaneous molding process with base 1)
The distal end of the strut 5 is bent to form a hook-shaped elastic engagement pawl 4 facing the engagement portion 3, or, although not shown, the entire contact spring pieces A and B are covered. The switch cover 6 is provided with a protrusion as appropriate at a position facing the curved direction of the engaging portion 3 on the switch cover 6 or an appropriate case.

Reference numeral 7 denotes a reset piece extending over a part of the elastic engagement claw 4. If necessary, the engagement portion 3 and the elastic engagement claw 4 can be disengaged to return the switch to its original state. It is used to restore.

In addition, the switch cover 6 has contact spring pieces A and B.
...In addition, it covers almost the entire body of the switch and is attached so that it can be attached and detached freely, and in some cases, it can be rotated at a certain angle in a circular arc.

8 is an elastic leg with claws for engaging and installing the switch (its insulating base) on a mechanical chassis or printed circuit board, etc. with one touch; 9 is an insulating separator;
10 indicates an insulating stay, and these 8, 9, 1
0 is provided by simultaneous molding when the insulating base 1 is molded from plastic, similar to the above-mentioned pressers 2 and the like.

In the above structure, when the leaf switch of the present invention presses the pusher 2 of the movable contact spring piece A, the spring piece A is bent and its contact a is closed with the contact b of the fixed contact spring piece B ( Normally open type)
or open (normally closed type), and at the same time, an elastic engagement pawl 4 installed relative to the engagement part 3 provided on a part of the pusher 2 elastically engages to close the contacts a and b. Alternatively, the open state may be maintained as is.

As mentioned above, the proposed leaf switch is installed in the circuit as appropriate depending on the necessity of the circuit configuration, and at a certain point the proposed switch is operated to close or open, and the closed or open state is maintained. There are characteristics that can be obtained,
Moreover, it has an excellent feature that the above-mentioned effects can be achieved extremely easily with an extremely simple configuration.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment (normally open type) of the leaf switch of the present invention, and FIG. 2 is a front view showing another embodiment (normally closed type) of the leaf switch. Number, A...Movable side contact spring piece, B...Fixed side contact spring piece, a, b...Contact, 1...Insulating base,
2... Presser, 3... Engaging portion, 4... Elastic engagement claw, 5... Support column, 6... Switch cover, 7...
Reset piece, 8... elastic leg with claw, 9... separator, 10... stay.

Claims (1)

[Scope of Claim for Utility Model Registration] A movable contact spring piece A and a fixed contact spring piece B are embedded in an insulating base 1 in substantially parallel manner. A pusher 2 with a protruding engaging portion 3 is embedded, and a hook-shaped elastic engagement claw 4 is integrally placed on the insulating base 1 in the direction of bending of the movable contact spring piece A by the pusher 2. A reset piece 7 is formed at the tip of the pillar 5 erected at the front end of the support 5 opposite to the engaging part 3, and a reset piece 7 is provided protruding from the upper part of the elastic engaging claw 4, and a rectangular box-shaped switch cover 6 is provided between both contacts. It covers the spring pieces A, B and the support column 5, and has the front end of the presser 2 and the upper end of the reset piece 7 protruding outside through a hole or slit, and the lower end opening is attached to the insulating base 1. It is a leaf switch that closes or opens both contacts a and b, and engages the engaging portion 3 and the elastic engaging claw 4 by the rebending motion of the movable contact spring piece A due to the pressure of the pusher 2. 1. A leaf switch, characterized in that the contacts a and b are maintained in the closed or open state.