JP3808730B2 - Steering lock device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a steering lock device used in a vehicle such as an automobile.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a steering lock device that locks a handle of a vehicle such as an automobile is provided with a key detection switch that detects insertion of a key and an ignition switch that is operated according to the rotation position of the key. It was common.
[0003]
[Problems to be solved by the invention]
However, if the key detection switch and the ignition switch are separate, there is a problem that the device is complicated and expensive.
[0004]
[Means for Solving the Problems]
In order to solve the above problem, the present invention includes a lock mechanism that locks or unlocks the steering shaft in accordance with the rotation of the key, and an ignition switch that is switched according to the rotation position of the key. Steering lock device
Has a cam pin which is pushed by the insertion of the key, a switch mechanism for detecting the pushing of the cam pins in the fixed contacts in the ignition switch, the switching mechanism, the pressing part and the other is pressed by the cam pin at one end A push bar having a spring receiving portion on the end side, a first spring disposed on the spring receiving portion of the push bar, and urged toward the fixed contact side by the first spring, and the first spring on the one end side A movable contact having a spring receiving portion and a second spring receiving portion on the other end side; and a second spring disposed between the second spring receiving portion of the movable contact and the fixed contact. It is characterized by being configured.
[0005]
According to this configuration, the ignition switch and the key detection switch can be integrated, and the apparatus can be simplified and the cost can be reduced. Further, by providing the first spring between the cam pin and the movable contact and providing the second spring between the movable contact and the fixed contact, variations in the stroke amount of the cam pin can be absorbed by these springs. A stable switch operation can be obtained.
[0006]
In the steering lock device of the present invention, the fixed contact includes a first fixed contact and a second fixed contact, and the first fixed contact and the second fixed contact are interposed via the second spring and the movable contact. May be made conductive.
As described above, since the first and second fixed contacts are connected to each other via the second spring, it is possible to eliminate contact failure due to variations in component accuracy.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows an overall configuration of a steering lock device 10 according to an embodiment of the present invention. In FIG. 1 (the same applies to FIGS. 2 to 4), the right side is referred to as “front” and the left side is referred to as “rear” for convenience.
[0008]
The steering lock device 10 includes a hollow body 12 that is integrally formed of a metal such as aluminum. A cylindrical holder 14 is fixedly accommodated at the front end of the body 12. Inside the holder 14, a substantially cylindrical cylinder 16 is accommodated so as to be movable in the axial direction of the holder 14 and rotatable.
[0009]
Inside the cylinder 16, a plurality (10 in the present embodiment) of plate tumblers 18 are arranged at equal intervals in the axial direction of the cylinder 16. Each tumbler 18 is urged alternately by a spring (not shown) in a direction orthogonal to the axial direction of the cylinder 16, and when a mechanical key is not inserted into the cylinder 16, an end of the tumbler 18 is an outer peripheral surface of the cylinder 16. It protrudes from both sides. The protruding end of the tumbler 18 engages with a lock groove 14 a formed on the inner peripheral surface of the holder 14, thereby preventing the cylinder 16 from rotating within the holder 14. On the other hand, when the mechanical key is inserted into the cylinder 16, each tumbler 18 is immersed in the cylinder 16, and each protruding end is retracted from the outer peripheral surface of the cylinder 16. As a result, the engagement between each tumbler 18 and the lock groove 14 a of the holder 14 is released, and the cylinder 16 can be rotated in the holder 14 to the lock position, the ACC position, the on position, and the start position.
[0010]
A shutter 20 is disposed on the front end side of the cylinder 16. The shutter 20 is slidable in a direction perpendicular to the axial direction of the cylinder 16, and is urged radially inward of the cylinder 16 by a spring (not shown). Further, the shutter 20 partially closes a key hole (not shown) of the cylinder 16 when the key is not inserted. On the other hand, the end of the shutter 20 protruding from the outer peripheral surface of the cylinder 16 is engaged with the inner surface of the holder 14 in which the cylinder 16 is accommodated when the cylinder 16 is pushed and moved rearward when the key is inserted. A combined taper portion 14b is formed.
[0011]
A cam pin 24 integrally formed with a cam 22 is connected to the rear end portion of the cylinder 16. The cam pin 24 rotates integrally with the cylinder 16. A lock shaft 26 is abutted against the cam 22 by a spring (not shown). Accordingly, when the cylinder 16 is rotated from the lock position to the ACC position by the key, the cam pin 24 and the cam 22 are rotated and the lock shaft 26 is moved backward in FIG. As a result, the distal end portion of the lock shaft 26 is disengaged from a recess of the steering shaft (not shown), and the steering lock is released (that is, unlocked). Conversely, when the cylinder 16 is returned from the ACC position to the locked position and rotated by the key, the cam pin 24 and the cam 22 rotate and the lock shaft 26 moves forward in FIG. As a result, the distal end portion of the lock shaft 26 engages with the concave portion of the steering shaft, and the steering shaft is locked.
[0012]
A spring 28 is mounted around the rear end side of the cam pin 24. The cam pin 24 and the cylinder 16 are always urged forward by the spring 28.
[0013]
An ignition switch 30 is attached to the rear end of the body 12. The rear end portion of the cam pin 24 extends inside the ignition switch 30. When the cylinder 16 is rotated from the locked position to the ACC position, the on position, and the start position by a key, the ignition switch 30 is turned on for accessory parts such as a radio, and various indicator lamps such as an ignition lamp are turned on. Conventionally known switch operations such as engine start by cell motor operation are made. Details of the structure of the ignition switch 30 will be described later.
[0014]
Next, the operation at the time of key insertion of the steering lock device 10 having the above configuration will be described.
As shown in FIG. 2, when the mechanical key 2 is inserted into the cylinder 16, the shutter 20 is prevented from sliding by the inner peripheral surface of the holder 14 when the key is inserted. Pushed backwards. When the shutter 20 is pushed to a position corresponding to the engagement taper portion 14a of the holder 14, the shutter 20 protrudes from the cylinder 16 and engages with the engagement taper portion 14a. As the shutter 20 moves in this manner, the key hole of the cylinder 16 is opened, and as a result, the mechanical key 2 is inserted deeply into the cylinder 16. When the key 2 is inserted, the cylinder 16 and the cam pin 24 are held in the pressed state regardless of the urging force of the spring 28 because the shutter 20 is engaged with the engagement taper portion 14 a on the inner surface of the holder 14. Is done.
[0015]
On the other hand, when the mechanical key 2 is pulled out from the cylinder 16, the shutter 20 is immersed in the cylinder 16 by the biasing force of a spring (not shown), and the engagement with the engagement taper portion 14 b of the holder 14 is released. Thereby, the cylinder 16 and the cam pin 24 are pushed forward by the urging force of the spring 28, and return to the state shown in FIG.
[0016]
Next, the structure of the ignition switch 30 will be described in detail with reference to FIG.
The ignition switch 30 includes a case 32 in which the rear end portion of the cam pin 24 is inserted, and a terminal base 34 attached to the case 32. A rotor 36 that is fixed to the cam pin 24 and rotates integrally is accommodated in the case 32. A substantially disc-shaped first contact plate 38 and second contact plate 40 are attached to the rear portion of the rotor 36. The first contact plate 38 and the second contact plate 40 are urged rearward by springs 38a and 40a, respectively. When the contact plates 38 and 40 rotate together with the rotor 36 and come into contact with a plurality of contact portions (not shown), the switch operation as described above is performed according to the ACC position, the on position, and the start position of the cylinder 16. It has become so.
[0017]
A push bar 42 is provided in the rotor 36 so as to be slidable in the front-rear direction. The push bar 42 has a rod-shaped pressing portion 42a that extends to the front end side and faces the rear end portion of the cam pin 24, and a spring receiving portion 42b that protrudes to the rear end side.
[0018]
On the other hand, in the terminal base 34, a movable contact 44 made of a conductive material is provided coaxially with the push bar 42 and slidable in the front-rear direction. The movable contact 44 has a first spring receiving portion 44b protruding to the front end side of the flange portion 44a and a second spring receiving portion 44c protruding to the rear end side of the flange portion 44a. A first spring 46 is disposed between the spring receiving portion 42 b of the push bar 42 and the first spring receiving portion 44 b of the movable contact 44.
[0019]
First and second fixed contacts 48 and 50 that are not in contact with each other are fixed to the rear end portion of the terminal base 34. The bent portion 48a at the front end of the first fixed contact 48 faces the second spring receiving portion 44c of the movable contact 44, and has conductivity between the bent portion 48a and the second spring receiving portion 44c of the movable contact 44. A second spring 52 is provided. As a result, the second spring 52 is in contact with both the first fixed contact 48 and the movable contact 44. On the other hand, the bent portion 50a at the front end of the second fixed contact 50 is not in contact with the second spring 52 and is opposed to the flange portion 44a of the movable contact 44 by a predetermined distance.
[0020]
Next, the operation in the ignition switch 30 having the above configuration will be described.
When the key 2 is not inserted into the cylinder 16 of the steering lock device 10, the cam pin 24, the push bar 42, and the movable contact 44 are in the positional relationship as described above. That is, the cam pin 24 is not pushed in, the cam pin 24 and the push bar 42 are not contacted, and the movable contact 44 and the second fixed contact 50 are not contacted.
[0021]
On the other hand, when the key 2 is inserted into the cylinder 16 as described above, the cam pin 24 is pushed backward (in the direction of arrow A) as shown in FIG. Then, the rear end portion of the cam pin 24 comes into contact with the pressing portion 42a of the push bar 42, and the push bar 42 is pressed rearward to move. Accordingly, the movable contact 44 is also urged rearward and moved by the urging force of the compressed first spring 46, and the flange portion 44 a of the movable contact 44 comes into contact with the bent portion 50 a of the second fixed contact 50. At this time, the second spring receiving portion 44 c of the movable contact 44 and the bent portion 48 a of the first fixed contact 48 are not in contact with each other. As a result, the first fixed contact 48 and the second fixed contact 50 are electrically connected via the second spring 52 and the movable contact 44. By detecting this conduction with a controller (not shown), it is possible to detect that the key 2 is inserted into the cylinder 16.
[0022]
In the switch mechanism of this embodiment, the two springs 46 and 52 are used to absorb variations in the stroke amount of the cam pin 24 and variations in component accuracy. However, in the switch mechanism of the present invention, the push bar 42 and the second The first spring 46 may be omitted and the movable contact 44 may be pushed directly by the cam pin 24, or the shape and arrangement of the first and second fixed contacts 48 and 50 may be changed so that the fixed contacts 48 and 50 are moved. It is also possible to conduct only through the movable contact 44.
[0023]
【The invention's effect】
As is clear from the above description, according to the steering lock device of the present invention, the ignition switch and the key detection switch can be integrated, and the cost can be reduced.
[0024]
In addition, the first spring is provided between the cam pin and the movable contact that are interlocked according to the insertion and removal of the key, and the second spring is provided between the movable contact and the fixed contact. Can be absorbed by the spring, and stable switch operation can be obtained.
[0025]
Further, since the first and second fixed contacts are made conductive through the second spring, it is possible to eliminate contact failure due to variations in component accuracy.
[Brief description of the drawings]
FIG. 1 is an overall cross-sectional view of a steering lock device.
FIG. 2 is an overall cross-sectional view of a steering lock device when a key is inserted.
FIG. 3 is an enlarged sectional view of an ignition switch.
FIG. 4 is an enlarged cross-sectional view of an ignition switch with a key detection switch turned on.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Steering lock apparatus, 12 ... Body, 14 ... Holder, 16 ... Cylinder, 18 ... Tumbler, 20 ... Shutter, 22 ... Cam (lock mechanism), 24 ... Cam pin, 26 ... Lock shaft (lock mechanism), 30 ... Ignition Switch ... 42 Push bar (switch mechanism) 44 ... Movable contact (switch mechanism) 46 ... First spring (switch mechanism) 48 ... First fixed contact 50 ... Second fixed contact 52 ... Second spring ( Switch mechanism).

Claims (2)

In a steering lock device comprising: a lock mechanism that locks or unlocks a steering shaft according to the rotation of a key; and an ignition switch that is switched according to the rotation position of the key.
The ignition switch has a cam mechanism that has a cam pin that is pushed in by insertion of the key, and detects the pushing of the cam pin with a fixed contact. The switch mechanism has a pressing portion that is pressed by the cam pin on one end side, and the like. A push bar having a spring receiving portion on the end side, a first spring disposed on the spring receiving portion of the push bar, and urged toward the fixed contact side by the first spring, and the first spring on the one end side A movable contact having a spring receiving portion and a second spring receiving portion on the other end side; and a second spring disposed between the second spring receiving portion of the movable contact and the fixed contact. A steering lock device characterized by comprising . The fixed contact includes a first fixed contact and a second fixed contact, and the first fixed contact and the second fixed contact are electrically connected via the second spring and the movable contact. steering lock device according to 1.

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