JPH0134826Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a switch that can selectively connect and disconnect a plurality of contacts depending on the amount of movement of a switch lever.

(Prior art) Conventionally, there are various structures of switches that can selectively open and close multiple contacts, but these have a fixed contact piece provided inside the switch case and a switch lever that can be operated. It has a structure in which multiple sets of movable contact pieces are arranged in parallel. In addition, the structure for operation includes a switch lever that rotates in a seesaw manner on the switch case, and a slider that is pressed against the center portion of each movable contact piece. By providing engaging parts that differ depending on the operation position of the switch lever, each slider can be operated individually at each operation position, and the movable contact piece corresponding to this slider can be moved. It was designed to connect and disconnect predetermined contacts by pressing and rotating.

However, in the conventional switch as described above, since a plurality of movable contact pieces and fixed contact pieces are arranged in parallel, the wiring board becomes wider and the switch becomes larger. However, since a structure was provided between the switch lever and the slider to enable selection of the contact point, there was a problem in that the operating mechanism became complicated.

(Purpose of the invention) This invention was created by focusing on these conventional problems. By overlapping multiple movable contact pieces, it is possible to reduce the size of the switch, and it is also easy to use. The object of the present invention is to provide a two-stage switch that has a simple structure that reduces costs and improves assembly workability.

(Structure of the invention) The structure of the two-stage switch according to this invention is that a movable contact is provided in the switch case in a rotatable state at the center of the back of the switch lever, which is rotated in a seesaw manner on the switch case. In a switch that is provided with a slider that presses into the center of the piece, and presses and rotates the movable contact piece with the slider as the switch lever rotates to make and break the contact, a bottom surface inside the switch case, A support portion having two substantially parallel upper edges protruding is provided, and the support portion includes a first movable contact piece having upward protrusions at symmetrical positions with an interval larger than the distance between the two upper edges. A second movable contact piece having both ends extending further than both ends of the first movable contact piece is rotatably placed on the first movable contact piece. The slider is pressed into contact with the center of the movable contact piece, and when the switch lever is rotated, the line connecting the center of rotation of the switch lever and the tip of the slider is connected to the upper edge or protrusion. A fixed contact piece corresponding to the end of each movable contact piece is arranged on the bottom of the switch case so that a sense of moderation of the first or second stage switch operation can be obtained when the switch exceeds It's getting old.

(Example) This invention will be explained below based on the drawings.

FIGS. 1 to 4 are diagrams illustrating an embodiment of this invention.

That is, as shown in FIG. 1, the switch 1 has a switch lever 5 rotatably attached to a switch case 4 consisting of an upper casing 2 and a lower casing 3, which is operated in a seesaw manner. A holding member 6 having a downward opening hole 6a is fitted into the center of the back surface of the switch lever 5, and a coil spring 7 and a spherical lower end portion are fitted in the hole 6a. A slider 8 urged downward by the coil spring 7 is also inserted.

Further, at approximately the center of the bottom surface of the switch case 4, there is provided a support portion 9 having two approximately parallel upper edges 9a, 9a in a protruding state. The support portion 9 in this embodiment also serves as a contact piece, and the lower end portion passing through the bottom plate portion of the switch case 4 serves as a terminal.

As shown in FIG. 2, the support portion 9 includes a first movable contact piece 10 having upward protrusions 10a, 10a in symmetrical positions with a distance greater than the distance between the upper edges 9a, 9a. The first movable contact piece 10 has both upper edges 9 at its center.
By forming a downwardly curved portion that can be loosely fitted between a and 9a, a rotatable state is achieved.

Furthermore, on the upper surface of the first movable contact piece 10,
A second movable contact piece 11 whose both ends extend further than both ends of the first movable contact piece 10 is mounted, and the second movable contact piece 11 has, in its center,
By forming a downwardly curved portion 11a that can be loosely fitted between the protrusions 10a, 10a, a rotatable state is achieved. are pressed together. Note that on both sides of the curved portion 11a of the second movable contact piece 11, there are step portions 11b, 11 bent one step upward.
b is formed.

Then, each movable contact piece 1 installed as described above
In the neutral state (the state shown in FIG. 1), the sliders 0 and 11 are symmetrically balanced by the pressure contact of the slider 5, and their front and rear sides are supported by the side surfaces of the switch case 4.

Furthermore, fixed contact pieces 12 are provided on the bottom surface of the switch case 4 at positions corresponding to the lower surfaces of both ends of each of the movable contact pieces 10 and 11, and these fixed contact pieces 12 penetrate through the bottom plate portion. The lower end is the terminal.

Next, the operation of switch 1 will be explained.

First, when one side (the left side in FIG. 3) of the switch lever 5 is pushed down, the slider 8 slides on the curved portion 11a and the pressing force by the slider 8 is removed from the center of each movable contact piece 10, 11.
Both movable contact pieces 10 and 11 are in an inclined state. At this time, when the switch lever 5 is pushed in until the extension of the center line A connecting the rotation center and the lower end of the slider 8 passes the upper edge 9a, the first movable contact piece One end of 10 and the corresponding fixed contact piece 12 are in a connected state, and at the same time,
Since the increase or decrease in the resistance force when crossing the upper edge 9a is transmitted to the operating hand as a sense of moderation, it can be sensed that the connection state has been established.

Note that when you release your hand from the switch lever 5, the slider 8 moves to the curved portion 11 due to the repulsive force of the coil spring 7.
It slides to the center of point a and returns to its original neutral state (the state shown in Figure 1).

Next, when one side of the switch lever 5 is further pushed down from the above-mentioned first-stage contact connected state, the second movable contact piece 11 is further tilted, and as shown in FIG. Line is protrusion 1
0a, one end of the second movable contact piece 11 and the corresponding fixed contact piece 12 are in a connected state. Furthermore, since the increase or decrease in the resistance force when passing over the protrusion 10a is transmitted to the hand as a sense of moderation, it can be sensed that the second stage contact has also become connected.

Furthermore, the lower end of the slider 8 reaches the upper edge of the stepped portion 11b when the second stage contact is in the connected state, so that when the switch lever 5 is released, the slider 8 is By sliding down the stepped portion 11b, smooth automatic return can be performed.

In the above embodiment, the support part 9 which also serves as a terminal is provided, but the switch case 4
A configuration may also be adopted in which a portion corresponding to the upper edge portion 9a is integrally molded on the inner bottom surface, and another fixed contact piece is provided that contacts near the center of the first movable contact piece 10 when the first stage contact is connected.

It is also possible to have a configuration in which two or more movable contact pieces are stacked one on top of the other, but there are limits to the protruding range of the slider and the rotation range of the switch lever, so a two-stage type provides the smoothest operation. It is possible and practical.

(Effects of the invention) As explained above, according to the two-stage switch of this invention, there is a
A slider is provided that presses against the center of a movable contact piece that is rotatably provided in the switch case, and as the switch lever rotates, the slider presses and rotates the movable contact piece to make a contact. In the switch, a support part having two substantially parallel upper edges protruding is provided on the bottom surface of the switch case, and the support part is provided with a support part having two substantially parallel upper edges protruding from each other, and a support part having a distance larger than the distance between the two upper edges. A first movable contact piece having upward protrusions in symmetrical positions is rotatably mounted, and a second movable contact piece having both ends extending further than both ends of the first movable contact piece is attached to the first movable contact piece. Since the movable contact piece is rotatably mounted and the slider is pressed against the center of the upper surface of the second movable contact piece, one movable contact piece is attached to the bottom surface of the switch case, which is the base of the wiring. It is only necessary to have a space equivalent to 100 yen, and the switch can be made smaller.
Furthermore, since there is no need to separately provide a new configuration for selecting a contact point, the structure can be simplified, resulting in lower costs and improved assembly workability.

[Brief explanation of the drawing]

Fig. 1 is a sectional view illustrating the structure of a two-stage switch according to an embodiment of the invention, Fig. 2 is a perspective view illustrating the shape and assembly procedure of the support portion and each movable contact piece, and Fig. 3 is a sectional view illustrating the structure of a two-stage switch. FIG. 4 is a sectional view illustrating the first stage contact connection state, and FIG. 4 is a sectional view illustrating the second stage contact connection state. 1...Switch, 4...Switch case, 5...
...Switch lever, 8... Slider, 9... Support part, 9a... Upper edge, 10... First movable contact piece,
10a... Protrusion, 11... Second movable contact piece.

Claims (1)

[Scope of utility model registration request] A slider is provided at the center of the back surface of the switch lever, which rotates in a seesaw manner on the switch case, and presses against the center of a movable contact piece rotatably provided in the switch case. In a switch that presses and rotates the movable contact piece with the slider as the switch moves, the switch connects and disconnects the contact by pressing and rotating the movable contact piece with the slider, and a support part having two substantially parallel upper edges protruding is provided on the bottom surface inside the switch case. With,
A first movable contact piece having upwardly directed protrusions in symmetrical positions is rotatably placed on the support portion at an interval larger than the interval between the upper edges, and the first movable contact piece is rotatably mounted on the first movable contact piece. A second movable contact piece whose both ends extend further than both ends of the first movable contact piece is rotatably mounted, and the slider is pressed into contact with the center part of the upper surface of the second movable contact piece. Features a two-stage switch.