JPH062183Y2 - Vehicle start switch structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a vehicle start switch arranged between a power source and a starter motor, and more particularly to a start switch structure effective for preventing theft.

(Prior art and its problems) As a vehicle starter switch, for example, Japanese Utility Model Laid-Open No. 60-143858
A rotary switch type having a cylinder lock as described in Japanese Patent Laid-Open Publication is used.

With this kind of start switch, as shown in FIG.
A key cylinder 3 having a key insertion hole is rotatably accommodated in a cylinder case 2 which is fixed therein, and a rotary member 5 having a movable contact 4 fixed thereto is engaged with a tip end portion of the key cylinder 3. A protrusion 3A that fits in the groove 5A is provided. The movable contact 4 of the rotating member 5 is a starter contact ST, an ignition contact IG, and an accessory contact ACC arranged on the peripheral portion of a fixed member 6 fixed in the body case 1.
And the OFF contact can be selectively contacted, and the movable contact 4 is connected to the battery 8 and the ST as shown in FIG.
The contacts are connected to the starter motor 9, and the IG contacts and the ACC contacts are connected to respective ignition system and accessory system electric loads (not shown).

When starting the engine, the key 7 is first inserted to unlock the key cylinder 3 and the cylinder case 2, and the key 7 is rotated to rotate the rotating member 5 through the key cylinder 3. The movable contact 4 is brought into contact with the ST contact (at this time, the IG contact is also brought into contact) to energize the starter motor 9. However, in the case of the above-mentioned conventional configuration, the key cylinder 3 is destroyed, pulled out from the cylinder case 2, and the starter motor 9 can be easily energized by inserting a screwdriver or the like and turning the rotating member 5, so that it is stolen. There are many problems.

(Object of the Invention) In view of the above circumstances, an object of the present invention is to provide a starting switch structure for a vehicle in which the starter motor cannot be energized when the key cylinder is removed. To do.

(Structure of the Invention) Therefore, in the vehicle start switch structure according to the present invention, the first switch portion that opens and closes when the key cylinder rotates is provided with the second switch portion that is opened when the key cylinder is removed from the cylinder case. When connected in series and the key cylinder is removed, the second switch section arranged in series with the first switch section will be in the open state, so the start switch will be ON even if the first switch section is closed. Without this, power is not supplied to the starting electric system of the vehicle.

(Embodiment of the Invention) In the first to fifth illustrated start switches, a key cylinder 24 having a key insertion hole into which a key 23 is inserted is housed in a cylinder case 22 fixed in a main body case 21, and the key cylinder 24 In the body case 21 on the front end side, the first switch portion S including the rotating member 26 and the fixing member 28.
It contains W1.

The rotary contact 26 of the first switch unit SW1 has a movable contact 2
5, the ST member, the IG contact, the ACC contact, and the OFF contact are provided on the peripheral portion of the fixing member 28, and the battery connecting terminal portion 27 is provided on the central portion thereof. The rotary member 26 includes the key cylinder 2
An engaging groove 26A is formed in which the tip of the projection 24A at the four ends is fitted, and the movable contact 25 is always connected to the battery connection terminal portion 2
It comes in contact with 8.

On the other hand, in the middle portion of the protrusion 24A of the key cylinder 24,
As shown in FIG. 5, a conductive ring 32 is attached via an insulating bush 31, and a screw 33 is attached to the body case 21 side.
The ends of the two terminals a and b fixed through the insulating bracket 34 fixed by the above contact the outer surface of the conductive ring 32 to form the second switch section SW2.

The two switch parts SW1 and SW2 are arranged so that the second switch part SW2 is connected in series between the ST contact of the first switch part SW1 connected to the battery 8 and the starter motor 9 as shown in FIG. .

Incidentally, 35 and 36 respectively indicate seed lines.

In the start switch configured as described above, the key cylinder 2
When 4 is in a normal state, both terminals a and b are in contact with the conductive ring 32, so that the second switch section SW2 is always closed. Therefore, if the key cylinder 24 is turned to the starter position by the key 23, the first switch portion S
The ST contact of W1 is turned on, and the battery 8 is energized to the starter motor 9.

On the other hand, when the key cylinder 24 is removed, the conductive ring 3
Since 2 is also removed together with the key cylinder 24, the second switch section SW2 is always open. Therefore, even if the ST contact of the first switch unit SW1 is turned ON, the starter motor 9 is not energized and the engine cannot be started. Therefore, there is no danger of being stolen.

Although the second switch section SW2 is provided between the ST contact and the starter motor 9 in this embodiment, the second switch section SW2 may be provided between the IG contact and the ignition system electric load. Alternatively, it may be arranged between the battery 8 and the first switch unit SW1.

(Effects of the Invention) According to the vehicle start switch structure according to the present invention as described above, when the key cylinder is pulled out, the vehicle starting electric system cannot be energized, so that the vehicle is prevented from being stolen. You can

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view showing an embodiment of a starting switch structure according to the present invention, FIG. 2 is a sectional perspective view of an essential part thereof, FIG. 3 is a wiring diagram thereof, and FIG. 4 is a first switch portion. Exploded perspective view,
FIG. 5 is a sectional view of the second switch portion, FIG. 6 is a sectional view of a conventional example, and FIG. 7 is a wiring diagram thereof. 8 ... Battery, 9 ... Starter motor 21 ... Main body case, 22 ... Cylinder case 24 ... Key cylinder 24A ... Protrusion SW1 ... First switch section SW2 ... Second switch section

Claims (1)

[Scope of utility model registration request] 1. A starting switch arranged between a power source and a starter motor, wherein a key cylinder fixed in the starting switch body and rotatably housed in a cylinder case, and a rotation of the key cylinder. A starting switch structure for a vehicle, comprising: a first switch part that opens and closes; and a second switch part that is connected in series to the first switch part and that is opened by detaching the key cylinder from the cylinder case. .