JPH0126019Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a tumbler switch whose switch operation changes from a first state to a second state or vice versa by pushing an operating knob in the left-right direction (or up-down direction).

A tumbler switch is often equipped with a movable plate that seesaws in conjunction with an operating knob, and has a structure in which a movable contact on the movable plate comes into pressure contact with a fixed contact when the switch is operated.

Since such a switch has a pressure contact structure, the contact resistance increases quickly, and if the switch has a contact structure with two or more circuits, it not only becomes a complicated structure but also causes variations in contact pressure.

Contacts generate heat due to increased contact resistance, variations in contact pressure, etc., which can lead to welding of contacts and malfunction, and it is well known that various measures have been proposed to prevent contact welding. That's right.

This invention was developed with the aim of solving the above-mentioned drawbacks, and includes a rotating body that rotates in conjunction with an operation knob that is pushed in the left-right direction (or up-down direction). The feature is that the electrical contact piece is configured to slide on a fixed terminal board.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 is a front view of the switch according to the present invention, Figure 2 is a front view of the switch according to the present invention;
The figure is a cross-sectional view taken along the line A--A in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line B--B in FIG.

In these drawings, 1 is a switch base;
Reference numeral 2 denotes a switch cover detachably fixed to the front part of the switch base 1.

The interior of the switch base 1 is divided into two spaces, front and back, by a partition 1c, and each of these spaces is equipped with a driving member and a rotating body, which will be described below.

That is, the drive member 3 installed in the front space (the upper space in FIG. 3) has the support shafts 3a and 3b provided at both ends thereof fitted into the bearing grooves 1a and 1b formed in the switch base 1. 3a, 3b
It is designed to rotate clockwise or counterclockwise in FIG. 3 using the fulcrum as the fulcrum. The above bearing groove 1a,
1b is an elongated groove formed to stand upright in the front direction from the periphery of the partition 1c, and is connected to the support shafts 3a, 3
b is pressed against the groove end of this groove. Also,
A knob 3c integrally formed on the drive member 3 is an operating portion that protrudes forward of the switch cover from a window hole 2a provided in the switch cover 2. Furthermore, the drive member 3 has an interlocking rod extending inward of the switch. 3d and a protrusion member 4 that constantly provides a protrusion force is provided. This drive member 3 is shown as a partially sectional view in FIG. It is also inserted into a blind hole 3e provided in the drive member 3.

The above protruding member 4 provided on the drive member 3 is a chevron-shaped raised portion 1d formed on the partition 1c of the switch base 1.
It is arranged so that it hits the slope of the Therefore, although the drive member 3 is constantly pressed in the forward direction of the switch by the expansion force of the expansion spring 5,
Since the support shafts 3a and 3b abut against the groove ends of the bearing grooves 1a and 1b, they are stationary in the illustrated state.

As detailed in FIGS. 4 and 5, the chevron-shaped raised portion 1d is formed as a part of the switch base 1 approximately in the center of the partition 1c, and the protruding member 4 touches the top of this chevron-shaped raised portion 1d. This gives sharpness to the pivoting of the drive member 3.

4 is a cross-sectional view of the switch base 1, FIG. 5 is a front view of the switch base 1, and FIG. 6 is a rear view of the switch base 1.

Further, the interlocking rod 3d integrally formed with the drive member 3 passes through a rectangular hole 1e bored in one side (the upper side in FIG. 5) of the inner partition 1c, and its tip end extends into the rear space of the switch base 1 ( It is arranged so that it protrudes into the lower space (in Fig. 3).

On the other hand, a cylindrical portion 1f integral with the switch base 1 is formed in the rear space of the switch base 1, and a rotating body 6 is rotatably inserted into the cylindrical portion 1f. Further, a terminal board 7 made of a printed circuit board or the like is placed in the opening of the cylindrical part 1f (the lower end of the cylindrical part 1f in FIG. 3) and is fixed to the switch base 1. The rotating body 6 is constructed as detailed in FIGS. 8 to 11. In addition, FIG. 8 is a front view of the rotating body 6, FIG. 9 is a bottom view of the rotating body 6, and FIG.
The figure is a rear view of the rotating body 6, and FIG. 11a is a sectional view taken along the line DD in FIG. 9.

As is clear from these drawings, the rotating body 6 is a circular rotating block when viewed from the front, and an engaging groove 6a is formed in the front of the rotating body, the width of which increases from the center toward the periphery. The distal end portion of the interlocking rod 3d provided on the drive member 3 is inserted into the engagement groove 6a. Further, a convex portion 6b provided on the lower side of the circumferential surface of the rotary body 6 defines a rotation range of the rotary body 6. This convex portion 6b is located on the switch base 1.
It protrudes into a notch 1g (see FIGS. 2 and 6) formed in the cylindrical portion 1f of the cylindrical portion 1f, and its turning range is determined by the side edges of the notch 1g.

The rotating body 6 is equipped with two electrical contacts on the back side. The blind holes 6c ₁ and 6c ₂ provided on the back side are contact pieces 8
a, the blind holes 6d ₁ and 6d ₂ are equipped with contact pieces 8b, respectively, and the blind holes 6e and 6f are equipped with contact pieces 8a and 8b.
A spring is inserted to press the .

Although FIG. 11b shows the contact pieces 8b installed in the blind holes 6d ₁ and 6d ₂ and the spring 9 inserted into the blind holes 6f, the contact pieces 8a are formed in the same manner and are shown in FIGS. 12 and 13. It is installed parallel to the contact piece 8b as shown in FIG.

12 is a vertical sectional view of the switch taken along the line C--C in FIG. 3, and FIG. 13 is a sectional view similar to FIG. 12 showing an operating state.

The operation of the above switch will be explained below.

This switch is stable when the knob 3c is in the position shown in FIGS. 1 to 3, and when the knob 3c is pushed and moved to the position shown by the phantom line in FIG.

That is, when the driving member 3 is in the position shown in FIGS. 1 to 3, the protruding member 4 is in a state of sliding down the right slope of the chevron-shaped raised portion 1d. In the figure, a counterclockwise turning force is acting, but in this state, the rotating body 6 rotates clockwise and is in the operating state shown in FIG. 12 where the rotation is blocked, so the driving member 3 is stationary at the position shown. That is, although a clockwise rotational force is transmitted to the rotating body 6, the convex portion 6b of the rotating body 6 comes into contact with one side edge of the notch 1g to prevent further rotation. The body 6 is stably held in the state shown in FIG. The contact pieces 8a and 8b which have slid on the terminal board 7 and are displaced to the position shown in FIG. 12 form a first state of switch operation.

When moving the knob 3c to the position shown by the phantom line in FIG. 3, the knob 3c is pushed until the drive member 3 stands approximately upright in FIG. As a result of this pushing operation, the protruding member 4 retracts and ascends the right slope of the chevron-shaped protrusion 1d, slightly passing over the top of the protrusion 1d. After that, the protruding member 4 slides down the left slope of the chevron-shaped raised portion 1d while protruding.
As a result of this operation, the drive member 3 pivots clockwise in FIG. 3 all at once, and the knob 3c moves to the position shown by the phantom line in the figure.

On the other hand, in the above operation process in which the protruding member 4 ascends the right inclined surface of the chevron-shaped protrusion 1d, the tip of the interlocking rod 3d of the driving member 3 moves inside the engagement groove 6a of the rotating body 6 into the 12th position.
It is moving to the left in the figure, and the rotating body 6 is stationary in the state shown in FIG. 12. Then, when the protruding member 4 reaches the top of the chevron-shaped protrusion 1d, the interlocking rod 3
The tip end d contacts the step 6a ₁ of the engagement groove 6a. Therefore, when the protruding member 4 passes the top of the chevron-shaped protuberance 1d and the driving member 3 rotates clockwise all at once, the rotating body 6 quickly rotates counterclockwise in FIG. The operating state shown in the figure is reached. In this operating state, the protruding member 4 is in contact with the left inclined surface of the chevron-shaped protuberance 1d, so a turning force acts on the driving member 3 in the clockwise direction in FIG. The protrusion 6b, which receives the rotational force in the counterclockwise direction in the drawing, is stably held in a state where it abuts against the other side edge of the notch 1g. In addition,
The contact pieces 8a and 8b sliding on the terminal board 7 are the thirteenth
When the switch is moved to the position shown in the figure, the switch operation is the second
state.

Next, when the knob 3c is moved from the position shown by the phantom line in FIG. 3 to the position shown by the solid line, the rotating body 6 rotates clockwise from the state shown in FIG. 13 to the state shown in FIG. Similarly, when the protruding member 4 reaches the top of the chevron-shaped protrusion 1d, the tip of the interlocking rod 3d comes into contact with the forming step _6a2 of the engagement groove 6a provided in the rotating body 6, and then the rotating body 6 rotates all at once to the rotation position shown in FIG. As mentioned above, the present invention converts the tilting change of the driving member into the rotational movement of the rotating body,
The electrical contact piece mounted on the rotor slides on the terminal board, and the switch is opened/closed or switched by the electrical contact piece and the fixed contact on the terminal board. , variation in contact pressure is extremely small, and the contact surface is cleaned by sliding of the electrical contact piece. As a result, there is no risk that the contacts will heat up and weld.

Furthermore, since the electrical contacts are configured to slide on the terminal board, a tumbler switch with two or more circuits can be easily configured.

Particularly, in the present invention, the circular rotating body is supported by a cylindrical portion formed within the switch base, and the linkage mechanism between the rotating body and the driving member is formed at an eccentric portion of the rotating body. Since it is composed of a coupling groove and an interlocking rod extending from the drive member and projecting into the engagement groove, the switch operation is stable, and the structure is simplified with fewer parts. It is a tumbler switch that is easy to integrate and has an advantage in production costs.

Furthermore, as in the above embodiment, if the rotating body is rotated all at once by the second half rotation of the drive member, the opening/closing or switching of the switch can be speeded up, and the effect of quickly closing the switch can be particularly improved. It is advantageous to be able to achieve this. Furthermore, since the tumbler switch of the present invention has an electrical contact that rotates and slides, it does not require as much space for the contact stroke as compared to one in which the electrical contact moves as a seesaw. The form can be made smaller.

[Brief explanation of the drawing]

The drawings show an embodiment of the tumbler switch according to the present invention, and FIG. 1 is a front view of the switch, and FIG. 2 is a cross-sectional view of the switch base and switch cover taken along line A-A in FIG. 1. , Figure 3 is the first
A cross-sectional view of the switch base and the switch cover taken along line B-B in the figure, FIG. 4 is a cross-sectional view of the switch base, and FIG. 5 is a front view of the switch base.
Fig. 6 is a rear view of the switch base, Fig. 7 is a partially cut side view of the drive member, Fig. 8 is a front view of the rotating body, Fig. 9 is a bottom view of the rotating body, and Fig. 10 is FIG. 11a is a rear view of the rotating body, FIG. 11a is a sectional view taken along the line D-D in FIG. FIG. 13 is a longitudinal cross-sectional view of the switch taken along the line CC in FIG. 3, and FIG. 13 is a cross-sectional view similar to FIG. 12 showing the operating state. 1... Switch base, 1a, 1b... Bearing groove,
1d...Chevron-shaped protuberance, 1e...Rectangular hole, 1f...
... Cylindrical part, 1g ... Notch, 2 ... Switch cover, 3 ... Drive member, 3a, 3b ... Support shaft, 3c
...Knob, 3d...Interlocking rod, 4...Protruding member, 5
. . . Expansion spring, 6 . . . Rotating body, 6 a . . . Engagement groove, 6 b .

Claims (1)

[Scope of utility model registration request] A drive member whose middle part is pivotally supported on the switch base and can be freely rotated within a predetermined range using this shaft support as a fulcrum; It has a supported circular rotating body, an engagement groove formed in an eccentric portion offset from the rotation center of the rotating body, and an interlocking rod extending from the drive member and projecting into the engagement groove, A tumbler switch comprising a linkage mechanism that converts the rotational movement of a driving member into rotational movement of a rotating body, and a terminal board on which an electrical contact piece provided on the rotating body is fixed to a slidable switch base.