JPH0229637Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a contact structure for a rotary lever switch for switching on a plurality of electrical circuits.

2. Description of the Related Art A conventional contact structure of a rotary lever switch having a plurality of movable contacts is as shown in FIG. 1, for example. FIG. 1 shows a lighting switch installed at the tip of an automobile turn signal switch. The pole plate 1 has a shaft hole 1a in the center.
is bored, and two sets of fixed contacts 1b, 1c and fixed contacts 1d, 1e arranged in two rows in the direction of the shaft hole 1a are fixed. The movable contacts 2 and 3 are in a non-contact state with the fixed contacts 1b, 1c, 1d, and 1e in the off position, and in the first on position, only the movable contacts are in contact with the fixed contacts 1b and 1c, and in the second on position When rotated to the position, the movable contact 2 connects to the fixed contacts 1b and 1c.
Then, the movable contact 3 contacts the fixed contacts 1d and 1e, respectively. The fixed contacts 1b, 1c, 1d, and 1e are arranged in two rows in the direction of the shaft hole 1a of the pole plate 1.
Movable contacts 2, 3 that contact b, 1c, 1d, 1e
Since the rotary lever switch is disposed long in the direction of the shaft hole 1a, there is a problem that the diameter of the rotary lever switch and the entire switch become large.

Purpose of the invention The contact structure of the rotary lever switch according to the invention consists of four fixed contacts, a pole plate fixed to the operating lever, and a lever inserted through the pole plate and fixed to the knob. , a plurality of fitting projections that engage with the first movable contact plate and the second movable contact plate, and rotation prevention protrusions that fit into the rotation prevention holes of the first movable contact plate and the second movable contact plate. the knob, the first movable contact plate having two movable contact pieces bent toward the pole plate, three-dimensionally intersecting the first movable contact plate and bent toward the pole plate; and a second movable contact plate having two movable contact pieces shorter than the movable contact pieces of the first movable contact plate, and a contact spring for biasing the first movable contact plate and the second movable contact plate. The present invention provides a contact structure for a rotary lever switch, which allows the diameter of the rotary lever switch to be reduced.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the contact structure of a rotary lever switch according to the present invention will be described in detail with reference to the accompanying drawings. Reference numeral 4 designates a rotary switch knob for operating a retractable head lamp disposed at the tip of a turn signal switch 5 disposed near the handle. The knob 4 has a screw hole 4a formed on the side surface, and a set screw 6 is screwed into the screw hole 4a.
A lever 7 is fixed to a lever insertion hole 4b formed in the center of the knob 4.

4c is a fitting portion for fitting the knob 4 to the operating lever 8. 4d is a lever insertion hole 4 in the center.
b is a prismatic anti-rotation protrusion drilled in the center of the first movable contact plate 10 and the second movable contact plate 11.
This is a protrusion for inserting a. 4e, 4f, 4
g, 4h are formed on the diagonal line of the rectangle of the tip surface of the rotation prevention protrusion 4d, and the first movable contact plate 1
0, and a fitting protrusion for fitting the second movable contact plate 11. The fitting protrusions 4e, 4f, 4g, 4
h is the first movable contact plate 1 from the rotation prevention protrusion 4d.
0 or approximately the thickness of the second movable contact plate 11 . 4i, 4j, 4k, 4l are spring insertion holes for inserting contact springs 9a, 9b, 9c, 9d, and four fitting protrusions 4
Intervening in e, 4f, 4g, and 4h. 4m is a fixing groove interposed between the anti-rotation protrusion 4d and a spring insertion hole 4j bored on the left side of the anti-rotation protrusion 4d, for inserting the protrusion 10b of the first movable contact plate 10. and 4n is the rotation prevention protrusion 4.
d and a spring insertion hole 4l bored on the right side of the rotation prevention protrusion 4d, and is a groove into which the protrusion 10c of the first movable contact plate 10 is inserted.

The contact springs 9a, 9b are inserted into the spring insertion holes 4i, 4k of the knob 4, press the upper and lower ends of the first movable contact plate 10, and press the movable contact pieces 10d, 10e of the first movable contact plate 10. This is a coil spring for contacting the pole plate 12.

The contact springs 9c, 9d are inserted into the spring insertion holes 4j, 4l of the knob 4, press the left and right ends of the second movable contact plate 11, and press the movable contact pieces 11b, 11c of the second movable contact plate 11. This is a coil spring for contacting the pole plate 12. The first movable contact plate 10 is held between the contact springs 9a, 9b and the pole plate 12, and the first movable contact plate 10 is inserted between the fitting protrusions 4e, 4f, 4g, 4h,
The anti-rotation hole 10a is connected to the anti-rotation protrusion 4d, and the protrusion 1
Rotation is prevented by inserting 0b, 10c into fixing grooves 4m, 4n. The first movable contact plate 10 has protruding movable contact pieces 10d and 10e that come into contact with the upper and lower portions of the pole plate 12. The movable contact pieces 10d and 10e have rounded tips to improve sliding properties. First movable contact plate 10
In order to prevent contact with the second movable contact plate 11 which intersects with the second movable contact plate 11, the length of the movable contact pieces 10d and 10e is made longer than the length of the movable contact pieces 11b and 11e. The second movable contact plate 11 is the first movable contact plate 10
are arranged in a three-dimensional intersection, with one movable contact piece on the left and right.
1b, 11c, upper and lower fitting protrusions 4e, 4f, 4
The protrusions 11d and 11e are fitted into the protrusions 11d and 11e to prevent movement in directions other than the axial direction. The second movable contact plate 11 is held between the contact springs 9c and 9d and the pole plate 12, and the second movable contact plate 11 is
Insert the movable contact plate 11 into the projections 4c, 4f, 4g, 4
h and insert the anti-rotation hole 10a into the anti-rotation protrusion 4.
By fitting into d, rotation is prevented. The pole plate 12 has a lever insertion hole 12a for inserting the lever 7 in the center part, grooves 12b, 12c, 12d, 12e for fitting the fixed contact plates 13a, 13b, 13c, 13d on the upper, lower, left and right sides, and the grooves 1.
2b, 12c, 12d, 12e lever insertion hole 1
Each fixed contact plate 13a, 13b, 1 is placed in the corner near 2a.
Insertion hole 12 for crimping and fixing 3c and 13d
f, 12g, 12h, and 12j are drilled. 1
2j and 12k are convex portions formed on the outer circumferential surface of the pole plate 12, and serve to position the pole plate 12 when fitting it to the operating lever 8 and to prevent rotation.
Fixed contact plate 13a slidingly contacts the first movable contact plate 10
and the fixed contact plate 13b have the same shape, and the pole plate 1
Fixed in 2 symmetrical positions.

Fixed contact plate 13 slidingly in contact with second movable contact plate 11
c and the fixed contact plate 13d have the same shape and are fixed at symmetrical positions on the pole plate 12. 14 is a cord, each fixed contact plate 13a, 13b, 13c, 13
d, and is inserted through the cord cover 15a of the operating lever 8 and lever guide 15, and connected to a connector disposed near the steering shaft. FIG. 8 shows the off position of the movable contact pieces 10d, 10e, 11b, and 11c. is the first on position. is the second on position.

Function of the invention: First movable contact plate 10 and second movable contact plate 11
is inserted into the knob 4, and the contact springs 9a, 9
b, 9c, 9d and the pole plate 12, so it rotates at the same time as the knob 4.

The first movable contact plate 10 and the second movable contact plate 11 are in a state of three-dimensional intersection, but due to the difference in length between the movable contact pieces 10d and 10c and the movable contact pieces 11b and 11c, they maintain a distance so that they do not come into contact with each other. In the off position, each fixed contact piece 10d, 10e, 11b, 1
1c is a movable contact plate 13a, 13b, 13c, 13
This is a switch-off state in which there is no contact with d. When the knob 4 is rotated from the OFF position to the first ON position, the movable contact piece 11b of the second movable contact plate 11 is connected to the fixed contact plate 13c, and the movable contact piece 11c is connected to the fixed contact plate 1.
3d and switches on, forming one circuit. Next, when the knob 4 is rotated from the first on position to the second on position, the first movable contact plate 10
The movable contact piece 10d is attached to the fixed contact plate 13a, the movable contact piece 10e is attached to the fixed contact plate 13b, and the second movable contact plate 1
One movable contact piece 11b contacts the fixed contact plate 13c, and the movable contact piece 11c contacts the fixed contact plate 13d, respectively, and switch on, forming two electric circuits.

That is, when the knob 4 is turned to the first on position, one electric circuit is formed, and when the knob 4 is turned to the second on position, two electric circuits are formed. A movable contact piece 10d that contacts the pole plate 12 at both ends,
The first movable contact plate 10 having 10e and the second movable contact plate 11 having movable contact pieces 11b and 11c are as follows:
The fixed contact plates 13a, 13b, 13c, 13 are fixed to the pole plate 12 because they are arranged in an overpassed state.
d can be arranged in all directions around the lever insertion hole 12a. The pole plate 12 includes a fixed contact plate 13a,
Since 13b, 13c, and 13d are arranged in all directions around the lever insertion hole 12a, it is possible to shorten the diameter of the pole plate 12 and make the rotary switch thinner. That is, by shortening the diameter of the pole board 12, the diameters of the operating lever 8 into which the pole board 12 is inserted, the knob 4, etc. inserted into the operating lever 8 are shortened, and the entire switch is made thinner. be able to.

Effects of the invention The contact structure of the rotary lever switch according to the invention is achieved by making the length of the movable contact of the first movable contact plate that presses against the pole plate longer than the length of the movable contact of the second movable contact plate. , the first movable contact plate and the second movable contact plate can be arranged to cross each other, and the diameter of the pole plate and the diameter of the entire rotary lever switch can be reduced;
The screwdriver can be easily picked with the knob. Also,
In the present invention, the knob is formed with a rotation prevention protrusion that fits into the rotation prevention hole of the first movable contact plate and the second movable contact plate, and a fitting protrusion that engages with the first movable contact plate and the second movable contact plate. As a result, the first movable contact plate and the second movable contact plate can be held simply by inserting them into the knob. Therefore, it is easy to assemble the first movable contact plate and the second movable contact plate.

[Brief explanation of drawings]

FIG. 1 is a front view showing a conventional example of a pole plate of a rotary lever switch. Figure 2, Figure 3, Figure 4,
5, 6, 7 and 8 are drawings showing the contact structure of the rotary lever switch according to the present invention, FIG. 2 is a partial sectional view, FIG. 3 is an exploded perspective view,
Fig. 4 is a front view of the knob when the movable contact plate is inserted, Fig. 5 is a sectional view taken along the line A-A in Fig. 4,
Figure 6 is a front view of the knob, Figure 7 is from arrow B in Figure 6.
8 is a front view of the pole plate. 1... Pole board, 1b, 1c, 1d, 1e... Fixed contact, 2, 3... Movable contact, 4... Knob, 4d...
...Anti-rotation protrusion, 4e, 4f, 4g, 4h...Inset protrusion, 4i, 4j, 4k, 4l...Spring insertion hole, 4m, 4n...Fixing groove, 8...Operation lever, 10...First Movable contact plate, 10a, 11a...
...Rotation prevention hole, 10b, 10c, 11d, 11c
... Projection piece, 10d, 10e, 11d, 11e...
Movable contact piece, 11...Second movable contact plate, 12...Pole plate, 12b, 12c, 12d, 12e...Groove, 1
2f, 12g, 12h, 12i...insertion hole, 13
a, 13b, 13c, 13d... Fixed contact plate.

Claims (1)

[Scope of utility model registration request] A pole plate that fixes four fixed contact pieces and is also fixed to the operating lever, a lever inserted through the pole plate and fixed to the knob, a first movable contact plate, and a second movable contact plate.
The knob protrudes from a plurality of fitting protrusions that engage with the movable contact plate, and anti-rotation protrusions that fit into the anti-rotation holes of the first movable contact plate and the second movable contact plate, and the knob is directed toward the pole plate. the first movable contact plate having two movable contact pieces bent at the same angle; and the movable contact plate of the first movable contact plate that intersects the first movable contact plate and is bent toward the pole plate. a second movable contact plate having two shorter movable contact pieces; and a second movable contact plate having two shorter movable contact pieces;
A contact structure for a rotary lever switch comprising a movable contact plate and a contact spring for biasing the second movable contact plate.