JPH0228571Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to an improvement of a snap switch having a common terminal and a normally closed terminal or a common terminal and a normally open terminal.

"Conventional Device and Its Disadvantages" In general, a snap switch has a common terminal 3, a normally closed terminal 15a, and a normally open terminal 15b, as shown in FIG. 4, and switches the flow of electricity by selectively contacting a movable contact 18. It's becoming like that.

However, when obtaining a snap-action action that simply turns electricity on and off, a normally closed A normally open switch having a common terminal and a normally open terminal, that is, a single cut switch is provided. Such a single cut switch has a normally open terminal 15 shown in FIG.
Since either one of the terminal b and the normally open contact 17b or the normally closed terminal 15a and the normally closed contact 17a is unnecessary, the contact stopper 23 is used instead.
This contact stop is designed so that the contact spacing and other characteristics are the same as the double-cut switch shown in FIG. This contact stopper is a necessary part, and has the same function as the normally open contact 17b in a double-way switch, except that it does not conduct electricity.

In this way, a conventional single-cut switch can reduce the current flow of electricity in a double-cut switch by using a contact stop 23 instead of the normally open contact 17b.
Despite the fact that the property of being able to switch between different types has been lost, there is no change in the number of parts or assembly time.Furthermore, because a special part called the contact stopper 23 is required, the number of types increases, and This increases mold costs and inventory management costs.

``Purpose of the invention'' This invention takes into account the shortcomings of the conventional method,
The purpose of this is to improve the efficiency of assembly work, shorten the work time, save mold costs, and equalize characteristics by reducing the number of types of parts.

"Summary of the invention" In order to achieve its purpose, this invention provides a pair of grooves in the side wall of the housing at a predetermined distance from each other, fits a fixed terminal plate into one of the grooves, and A cover that covers the housing is provided with a protrusion that fits into the other groove.

``Example'' An example of this invention will be described below with reference to the drawings.

That is, in FIGS. 1 to 3, an anchor 2 is attached to a housing 1, one end of which is fitted into the inner wall of the housing 1, and the other end extends through the housing 1 to the outside thereof, and is connected to a common terminal 3. is formed. One end of a lever 5 is engaged with the anchor 2, and the other end is in contact with a plunger 6 slidably attached to the housing 1. One end of a movable contact plate 7 is engaged with the other end of the lever 5, and its compression member 8 is in contact with the anchor 2. A pair of grooves 12a and 12b are provided in one side wall 11 of the housing 1 at a predetermined interval, and a fixed terminal plate 15 is fitted into one of the grooves. One end of this fixed terminal plate is located inside the housing 1, and the other end extends outside the housing 1 to form a terminal portion 16. Furthermore, a movable contact 18 that contacts the fixed contact 17 is provided at the free end of the movable contact plate 7 . Anchor 2, lever 5, movable contact plate 7, fixed terminal plate 15
A snap-acting switch mechanism is configured. In addition, one side of the cover 20 covering the opening of the housing 1 is provided with a groove 12 on the other side of the housing 1.
A protrusion 21 that fits into b is integrally molded.

Therefore, the plunger 6 is pressed, and the movable contact plate 7 is inverted, and the protrusion 21 is moved to the movable contact 1.
It is made to collide with 8.

Note that although the devices shown in FIGS. 1 to 3 are of the normally closed type, the fixed terminal plate 15 is connected to the other groove 12b.
and the protrusion 21 is fitted to the cover 20,
By providing it at a position that fits into one of the grooves 12a, it can be constructed as a normally open switch.

Further, the distance a between the movable contact 18 and the protrusion 21 is set to be the same as the contact distance.

"Effects" As described above, this invention has a pair of grooves 12a and 12b provided in the side wall of the housing 1 at a predetermined distance from each other, and a fixed terminal plate 15 is fitted into one of the grooves, and one of the grooves The cover 20 that covers the opening of the housing 1 is provided with a protrusion 21 that fits into the other groove 12b among the grooves 12a and 12b and abuts against the movable contact 18. , the contact can be fixed at the same time, thus improving the workability, and there is no need to prepare a separate contact stop, which is particularly advantageous in terms of inventory control, and moreover, the protrusion 21 does not fall off during use of the switch. Since there is no fear, a highly reliable switch can be obtained.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an embodiment of the snap switch of this invention, Fig. 2 is a front view with the cover removed, and Fig. 3 is a cut along line 3-3 in Fig. 2. 4th sectional side view seen in the direction of the arrow.
The figure is a front view of a conventional double-cut switch, Figure 5 is a front view of a conventional single-cut switch, and Figure 6 is a side cross-section taken along line 6-6 in Figure 5 and viewed in the direction of the arrow. It is a diagram. 1...Housing, 2...Anchor, 3...Common terminal, 5...Lever, 6...Plunger, 7
...Movable contact plate, 8...Compression member, 11...Side wall, 12a, 12b...Groove, 15...Fixed terminal plate, 16...Terminal portion, 17...Fixed contact, 18...
...Movable contact, 20...Cover, 21...Protrusion.

Claims (1)

[Scope of utility model registration request] The housing 1 houses a snap-acting switch mechanism, and the housing 1 is provided with a cover 20 that covers this opening.In the side wall of the housing 1, a pair of grooves 12a,
12b are provided at a predetermined interval from each other, and the fixed terminal plate 15 is fitted into one of these grooves 12a, while the cover 20 is fitted with the other groove of the grooves 12a and 12b. 12b and is provided with a protrusion 21 that abuts the movable contact 18 of the snap-acting switch mechanism.