JP2867615B2 - switch - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch used for switching power of an electronic device.

2. Description of the Related Art In power supply switches for electronic devices, small-sized switches called snap switches, which are safe and easy to handle and use a spring action, are used in many cases.

First, the configuration of this type of conventional power switch is described in Section 10.
This will be described with reference to the drawings.

An individual terminal 2 having a fixed contact 1 and a common terminal 5 having a swing support 4 of a switching plate 3 are incorporated in a terminal plate 6. The switching plate 3 has a movable contact 7 and a conductive leaf spring 8.
Are mounted so as to elastically contact the swing support portion 4 of the common terminal 5. A drive unit 10 having a protrusion at the lower portion is provided above it, and a pin 11 slides on the switching plate 3 via a coil spring 12 at the tip of the protrusion. These parts are stored in case 9 and case 9
The drive operation unit 13 covers the upper opening of the
The operation of this conventional switch locked above will be described with reference to FIG. 11. When one end of the drive operation unit 13 is pushed down, the drive unit 10 mechanically integrated swings, and the pin 11 Spring
By means of 12, the slider slides on the switching plate 3 under a constant pressure. Pin 11
When the switch exceeds the swing center of the switching plate 3, the switching plate 3 swings with the swing support 4 as a fulcrum, and the fixed contact 1 and the movable contact 7 come into contact with each other. Are electrically connected, and the switch is turned on (ON).

When the switch is turned off (OFF), the movable contact 7 is released from the fixed contact 1 by the same operation. When the switch is turned on, the movable contact 7 comes into contact with the fixed contact 1 instantaneously with a strong force, and a considerably large shock wave is generated. This shock wave causes the switching plate 3 to separate from the swing support portion 4 and to float. Therefore, the contact resistance increases remarkably. If the plate spring 8 is not provided and the current is large, the contact portions of the swing supporting portion 4 and the switching plate 3 are damaged by Joule heat generation and arc discharge.

One end of the leaf spring 8 is attached to the switching plate 3, but the other end is constantly in contact with the swing support portion 4 of the common terminal 5. Good electrical contact is maintained between the switching plate 3 and the common terminal 5 to prevent damage due to increased contact resistance.

However, the leaf spring 8 is provided with the switching plate 3 and the common terminal 5.
And the elastic force of the leaf spring 8 is
Is lifted and separated from the swing support portion 4. Therefore, in order to surely swing the switching plate 3 in contact with the swing support portion 4, it is desirable that the plate spring 8 be a thin plate material having a small spring constant. In order to swing reliably according to the
Must be made of a somewhat thick plate. Therefore, it is difficult to use the same material for the switching plate 3 and the leaf spring 8, and it is necessary to individually process and assemble them using different materials, and it is not possible to reduce the number of steps and to manufacture an inexpensive switch. There were challenges.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a switch that maintains good electrical connection even during operation, has a long service life, has a small number of components, and is easy to manufacture.

Means for Solving the Problems In order to achieve the above object, the present invention has a configuration in which the ridge on the side surface of the switching plate is supported at both ends of the swing center axis so as to be always elastically sandwiched in the axial direction. Things.

Action The present invention is configured such that the swing center axis is rotatably supported while being always elastically held in the axial direction by the above configuration.
The switching plate can swing freely about this axis. Moreover, the ridge of the switching plate is always securely held regardless of the swinging or vibration of the switching plate, and the electrical connection is maintained, so that when the contacts come into contact, a shock wave is generated and the switching plate may vibrate. This does not result in poor contact. Therefore, it is not necessary to separately provide a leaf spring for maintaining electrical contact in order to prevent damage due to poor contact. In addition, since the elastic member is elastically held between the swinging central axes, the switching plate having a large thickness can maintain stable contact with the supporting portion.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings, and FIG. 10 to FIG.
The same parts as those in FIG. 11 are denoted by the same reference numerals, description thereof will be omitted, and only different points will be described. First, the conventional switching plate 3
Instead of using a switching plate 21 made of an elastic metal thin plate integrally formed with beams 20a and 20b as shown in FIG. The switching plate 21 is mounted so that the portions 25a and 25b are sandwiched between the beams 20a and 20b of the switching plate 21, so that the switching plate 21 is supported by the receiving portion 23 of the swing support portion 22. Convex part 25 of swing support part 22
a and 25b are processed so as to have inclined portions 25c and 25d extending downward from above as shown in FIGS. 3 and 4,
The tip may be processed into a quadrangular pyramid or a cone. This not only can reduce the mechanical resistance at the time of rocking, but can also facilitate the work when inserting the switching plate 21 into the rocking support portion 22.

The OFF and ON operations of the switch are performed as shown in FIGS. 5 (a) and 5 (b) similarly to the conventional switch, but the conventional leaf spring 8 is not provided and the switching plate 21 is provided on both side surfaces. Beam 20a,
In a state where the projections 25a and 25b of the swing support portion 22 are always in elastic contact with the swing support portion 20b, the switching plate 21 swings, so that the switching plate 21 is operated during operation.
No electrical contact failure occurs between the terminal and the common terminal 5.

As shown in FIG. 6, the structure of the switching plate 21 includes slits 26e, 26f with holes for inserting the holes 26a, 26b, 26c, 26d and the convex portions 25a, 25b of the swing support portion 22 into the elastic metal plate. May be provided, and the outer portions thereof may function as beams 20a and 20b. Alternatively, the slits 26e and 26f may be shaped as shown in FIGS. 7 (a) and 7 (b) so that the outer beams 20a and 20b are sandwiched between the swing support portions 22. Further, as shown in FIGS. 8 (a) and 8 (b), the contact portion 24 of the swinging support portion 22 of the switching plate 21 with the receiving portion 23 may be processed by lifting upward.
A part of b may be a curved shape that is inclined, and may be a beam having a cantilever structure. These may be used in combination. In any case, a contact portion 24 between the beams 20a, 20b and the swing support portion 22 is provided near the swing center axis in order to reduce the mechanical resistance to the swing of the switching plate 21. The form of the operation section of the switch is not limited to a seesaw type as shown in FIG. 5, but may be a slide type, a lever type or a push type.

Next, the switching plate 21 in one embodiment according to the present invention is provided with slits 26e and 26f having a shape as shown in FIG. 9 without bending both sides of the switching plate 21 as shown in FIG.

Thereby, the elastic force in the side direction of the switching plate 21 made of a steel alloy can be efficiently used, and the switching plate 21 can be processed into a free shape because the side surface is not bent. In this embodiment, the slit width was substantially equal to the plate thickness. This is supported by a swing support portion 22 as shown in the figure. Therefore, the switching plate 21 is supported by the receiving portion 23 of the swing support portion 22, and
It swings while being elastically sandwiched between 27a and 27b. Swing support 22
The lower portions of the convex portions 25a, 25b are provided with tapers 25e, 25f to prevent the switching plate 21 from coming off. The operation of the switch of this embodiment is the same as that described above.

According to the present invention, as is apparent from the above embodiments, the switching plate is rotatably supported by elastically holding the ridge on the side surface of the switching plate in the axial direction of the swing center axis. Even when the switching plate does not deviate from the support portion, good electrical connection with the common terminal is maintained, and a switch for a power supply or the like which has a long life, has a small number of parts, and is easy to manufacture can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a switch, FIG. 2 is an enlarged exploded perspective view of a switching plate and a swing support portion, which are main components of the switch,
FIG. 3 is a side sectional view showing an assembled state of a main part of the switch, FIG. 4 is a plan view of a switching plate which is a main part of the switch, and FIGS. 5 (a) and (b) show operations of the switch. FIG. 6 is a sectional view showing the state, FIG. 6 is a plan view of another switch switching plate, FIG.
8 (a) and (b) are also a plan view and a front view of a switching plate of another switch, and FIGS. 8 (a) and 8 (b) are perspective views of the switching plate of another switch and plan views showing main parts thereof. FIG. 9 (a),
(B) is an exploded perspective view of the switching plate and its supporting portion in one embodiment of the present invention and a view seen from the direction A, FIG. 10 is an exploded perspective view of a conventional switch, and FIG. FIG. 1 ... fixed contact, 2 ... individual terminal, 5 ... common terminal, 7
…… Movable contact, 9 …… Case, 13 …… Drive operation part, 20a,
20b ... beam, 21 ... switching plate, 22 ... swing support, 23 ...
Receiving part, 24 ... Contact part, 25a, 25b ... Convex part, 27a, 27b ...
Ridge.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01H 23/00-23/30

Claims (1)

(57) [Claims] 1. A switching plate made of an elastic metal sheet having at least one movable contact, at least one individual terminal having a fixed contact that opens and closes between the movable contact, and a swing support of the switching plate. A common terminal having a unit, a case accommodating members other than these individual terminals and the common terminal, and a drive operation unit for performing a switching operation by swinging the switching plate, and switching the swing support unit. A switch in which the switching plate is elastically held between the plate receiving portion and the ridge on the side surface of the switching plate.