JPH0574269A - Switch - Google Patents

Abstract

PURPOSE:To realize cost reduction by reducing the number of constituting parts as well as to improve reliability in current supply in an electric power supply switch used in a public use electronic apparatus and an industrial apparatus. CONSTITUTION:A common terminal 3 and a separate terminal 2 are arranged in an insulating case 1, and tongue pieces 4a, 4b and 4c of a switching plate 4 having spring property are engaged curvedly with a switching plate locking piece 3a of the common terminal 3. The upper edge of the switching plate 4 is moved by means of a slidable body 8, and the lower edge part having a contact point 6 is reversed thereby, and a switch can be opened/closed, so that the number of parts can be reduced, and reliability can also be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch used in consumer electronic equipment and industrial electronic equipment.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to the switches shown in FIGS. According to the figure, 11 is an insulating case, and the individual terminal 12 and the common terminal 13 are fixed to the bottom surface of the insulating case 11, the contact 14 is fixed to the individual terminal 12, and the common terminal 13 is fixed. A substantially U-shaped leaf spring 18 and one end of a substantially C-shaped switching piece 17 are rotatably engaged with each other, and the other ends of the substantially C-shaped switching pieces 17 are substantially U-shaped and fixed to the lower end thereof. It is rotatably engaged with the plate 16. The common terminal 13 and the leaf spring 1
8, the above-mentioned respective engaged states of the switching piece 17 and the switching plate 16 are maintained by pressing each other by the spring force of the plate spring 18. Reference numeral 19 is a sliding body that engages with the upper end of the switching plate 16 and is slidably accommodated in the insulating case 11, and 20 is a frame 20 fixed to the insulating case 11 that guides the upper portion of the sliding body 19. Reference numeral 21 is a coil spring for returning the sliding body 19 to the returning state.

Next, the operation of the above switch will be described with reference to FIGS. 5 (a), 5 (b) and 5 (c). FIG. 5A shows a state in which the switch is off (OFF), and FIG.
When the sliding body 19 is slid in the f direction as shown in FIG.
The upper end portion B of the switching plate 16 is moved to the left by the concave portion 9 of 9 and the engagement point A between the switching plate 16 and the leaf spring 18 and the switching plate 16 are moved.
The switch is turned off until the line connecting the engagement point C of the switching piece 17 and the engagement point B of the common terminal 13 and the switching piece 17 is exceeded.
The state is maintained.

The sliding body 19 is further slid in the f direction, and the line connecting the engagement point A between the switching plate 16 and the leaf spring 18 and the engagement point C between the switching plate 16 and the switching piece 17 is switched with the common terminal 13. When the engagement point B of the piece 17 is exceeded, the lower end of the switching plate 16 is reversed to the left as shown in FIG. 5C, the contact 15 comes into contact with the contact 14 provided on the individual terminal 12, and the switch is turned off. It turns on.

[0005]

The above-mentioned switch is O
The switch has a fast-moving contact mechanism in which the movable contact portion reverses at N and OFF, and is a switch with extremely high reliability in terms of welding resistance and arc resistance of the contact, especially as a power switch of equipment.

However, the above switch has a complicated structure, so that the number of parts is large, the number of assembling steps is large, and the cost is extremely high. Further, since the common terminal 13, the switching piece 17, the leaf spring 18, and the switching plate 16 serve as a current path, the number of parts is large and the number of connecting points between parts is large.
It also caused fever.

The present invention solves such conventional problems, and an object of the present invention is to provide an inexpensive and high-performance switch.

[0008]

In order to solve the above problems, a metal plate having a spring property is used as a switching plate, and the conventional leaf spring and switching piece are replaced.

[0009]

As described above, the number of parts and the heat generation factor can be reduced.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A switch according to the present invention will be described with reference to one embodiment of FIGS. Reference numeral 1 denotes an insulating case. An individual terminal 2 and a common terminal 3 are fixed to the bottom surface of the insulating case 1, and a contact 5 is fixed to the individual terminal 2. Further, a switching plate 4 made of a metal having a spring property is incorporated in the common terminal 3, and the switching plate 4 is provided with two tongue pieces 4a and 4b which are substantially parallel from one side to the opposite side. There is one tongue piece 4c protruding from the other side so as to pass the two tongue pieces 4a and 4b. The engaging portions 3aa of the switching plate engaging piece 3a integrated with the common terminal 3 are arranged so that the tip portions 4d, 4e, 4f of the three tongue pieces of the switching plate 4 are bent.
It press-engages with 3ab and 3ac. Reference numeral 8 is a sliding body which has a recess 8a which engages with the upper end portion 4g of the switching plate 4 and is slidably accommodated in the insulating case 1, and 7 guides the sliding body 8 and the insulating case 1 It is a frame fixed to.

Next, the operation of the above switch will be described with reference to FIGS. 2 (a), 2 (b) and 2 (c). 2A shows a state in which the switch is OFF, and when the sliding body 8 is slid in the f direction as shown in FIG. 2B, the concave portion of the sliding body 8 causes the upper end portion b of the switching plate 4 to move. A line that moves to the left and connects the root portion A of the tongue piece 4c extending from the upper portion of the switching plate 4 and the root portion C of the tongue pieces 4a and 4b extending from the lower end extends to the tongue portion from below the switching plate 4. The switch is maintained in the OFF state until the pressure contact engagement point B between the tips of the pieces 4a and 4b and the common terminal 3 is exceeded.

The sliding member 8 is further moved in the direction f so that the tongue pieces 4a, 4 extending from the root portion A of the tongue piece 4c and the lower end thereof.
The line connecting the root portion C of b with the tips of the tongues 4a and 4b extending from the lower side of the switching plate 4 and the press contact engagement point B of the common terminal 3
2C, the lower end of the switching plate 4 and the contact 6 provided at the lower end of the switching plate 4 are inverted to the left and come into contact with the contact 5 provided at the individual terminal 2 as shown in FIG. , The switch changes from OFF to ON. Note that the operation from ON to OFF is the reverse of the above.

FIG. 3 shows another embodiment of the switch according to the present invention, in which the switching plate 4 is horizontal so that the switch can be made thinner.

Since the construction and operation of the embodiment of FIG. 3 are the same as those of the embodiment of FIG. 1, the same parts as those of the embodiment of FIG.

[0015]

As is apparent from the above embodiment, the present invention is provided with two tongue pieces projecting from one side to the other side and projecting from the other side to the one side so as to pass the tongue piece. The switching plate composed of the other tongue is fixed to the switching plate locking piece by press-fitting the tongues to the locking portions of the switching plate locking piece integrally provided on the common terminal. Since the conventional switching plate and the leaf spring are also used as the switching plate, the number of parts and the number of assembling steps can be reduced, the number of electrical connection points can be reduced, and the reliability of the switch can be improved.

[Brief description of drawings]

FIG. 1 (a) is a side sectional view of an embodiment of a switch of the present invention. FIG. 1 (b) is a perspective view for explaining the relationship between a common terminal and a switching plate, which are the same main parts.

2A, 2B, and 2C are cross-sectional views of relevant parts for explaining the same operation.

FIG. 3 is an exploded perspective view of the other embodiment.

FIG. 4 (a) is a side sectional view of a conventional switch.

5A, 5B, and 5C are cross-sectional views of main parts for explaining the same operation.

[Explanation of symbols]

 1 Insulating Case 2 Individual Terminal 3 Common Terminal 3a Switching Plate Locking Piece 3aa, 3ab, 3ac Locking Part 4 Switching Plate 4a, 4b, 4c Tongue Piece 8 Sliding Body

Claims (1)

[Claims] 1. An individual terminal mounted on an insulating case, two substantially parallel tongue pieces projecting from at least one side toward the opposite side, and the other side from the opposite side so that they pass each other. A switching plate provided with other protruding tongues, a switching plate locking piece provided with a locking portion for press-contacting each of the tongues so as to bend, and the switching plate locking piece And a common terminal attached to the above case,
A switch composed of a sliding body that engages with and slides on the switching plate to bring the individual terminal into contact with and away from the individual terminal.