JP2004306764A - Safety device for steering lock apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly convenient safety device for a steering lock apparatus capable of preventing an erroneous operation and certainly operating an engine. <P>SOLUTION: The safety device for a steering lock apparatus is provided with a key cylinder 9 having a projection part 9a projectedly provided toward a pressing-in direction of a key 3 on an outer peripheral part and turnably arranged in a housing 6 by the key 3; an urging member 15 for turning the key cylinder 9 from an on-position to a start position and elastically returning and turning it to the on-position; an ignition switch 18 switched interlockingly with key cylinder 9; and a fitting groove 6b making the projection part 9a movable to the pressing-in direction of the key 3 on the housing 6 at at least start position. An abutting part 6c for inhibiting the returning and turning of the key cylinder 9 at the pressing-in position of the key 3 at a predetermined range is provided on the fitting groove 6b until the above key cylinder 9 is elastically returned and turned from the start position to the on-position. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a safety device for a steering lock device used for a vehicle such as an automobile.
[0002]
[Prior art]
[Patent Document 1]
JP-A-63-192166
[0003]
Conventionally, a steering lock device inserts a key into a key cylinder, rotates the key cylinder from an on position to a start position by a key operation, performs an engine start operation, and then starts the key cylinder when a user releases the key. It automatically returns to the on position from the position. Then, when getting off the vehicle, turn the key cylinder back from the ON position to the ACC position to turn off the power supply to the starter motor circuit, and then return to the lock position from the ACC position and turn the key cylinder. The steering is locked by projecting the shaft and engaging with the recess of the steering shaft.
[0004]
In the steering lock device, the rear end of the key cylinder is connected to the camshaft, and the rear end of the camshaft is connected to the ignition switch, so that the ignition switch also rotates in conjunction with the rotation of the key cylinder. Has become. This ignition switch gives a sense of moderation when the user operates the key to rotate the key cylinder of the steering lock device to the lock position, ACC position, and ON position, and fixes the key cylinder at each of the above positions. A detent mechanism is provided. FIG. 8 is a cross-sectional view showing a detent mechanism of the ignition switch. A cam shaft of a steering lock device (not shown) is arranged on the front side of the drawing, and a contact point of an ignition switch (not shown) is arranged on the other side of the drawing. A rotor 22 connected to a rear end of a camshaft (not shown) is rotatably housed in the housing 21 of the ignition switch. The inner surface of the housing 21 is formed with detent portions 23 corresponding to the lock position, the ACC position, and the ON position of the key cylinder, and steel depressed outward by a spring 24 housed in the rotor 22. The ball 25 is fitted with the detent part 23. By this detent mechanism, when the user rotates the key cylinder, an appropriate moderation feeling is obtained at each of the positions, and the key cylinder is fixed at each of the positions.
[0005]
Also, a return spring is provided inside the housing of the steering lock device, and when the key cylinder is to be turned from the on position to the start position, the return direction of the key cylinder is turned to the on position so that the key cylinder is turned. Restoring force acts. When the key cylinder is turned from the ON position to the start position against the restoring force in the rotation direction of the return spring, the ignition switch is operated and the engine starts. When the user releases the key after starting the engine in this manner, the key cylinder automatically returns from the start position to the ON position by the restoring force in the rotation direction of the return spring.
[0006]
On the other hand, in such a steering lock device, in order to prevent the steering from being locked when the key is removed while the vehicle is running due to an erroneous operation, the key cylinder is returned to the locked position during the turning operation. There is a steering lock mechanism having a so-called two-motion (two-motion) mechanism that can return to the locked position by performing another operation to release the blocking by performing another operation to release the blocking. . In this two-motion mechanism, when the key cylinder is rotated from the lock position to the ACC position, the ON position, and the start position, the engine can be started by rotating the key cylinder without any trouble. When the key cylinder is rotated backward, the return rotation of the key cylinder is prevented at the ACC position. Therefore, an operation is performed in which the key cylinder is moved backward by pressing the key at the ACC position, and the key cylinder can be returned from the ACC position to the lock position and rotated in this pressed state.
[0007]
Furthermore, in recent years, in order to improve security, many automobiles and the like have an immobilizer function that permits the start of the engine only when the identity of the key is confirmed. In general, such an immobilizer function is provided with a transmitter that embeds a key into a key and modulates a predetermined personal identification code to transmit and output the electromagnetic wave as an electromagnetic wave, and a receiver that receives the electromagnetic wave transmitted and output from the transmitter is installed on the vehicle side. The receiving apparatus is configured to detect a received signal to extract a security code, determine whether the security code thus obtained matches or not, and selectively output a start permission signal to an engine start unit.
[Problems to be solved by the invention]
[0008]
In the conventional steering lock device as described above, the engine is started by rotating the key cylinder to the start position as described above, and then automatically returns from the start position to the on position by a spring when the hand is released from the key. However, the key cylinder is turned on when the return force is too strong, such as when the user suddenly releases his / her hand, rotates back at once, or when the return load of the return spring varies. There is a problem that the engine is turned at a stroke to the ACC position after passing through the position, and the started engine is stopped. As described above, the key cylinder is fixed at each position by the detent mechanism of the ignition switch.However, the detent mechanism obtains a good operation feeling at the time of key operation, and the automatic return of the key cylinder is turned on by the detent mechanism. It is not preferable to stop at the position because a large force is required at the time of key operation and the operational feeling is impaired.
[0009]
In recent years, a steering lock device having both a two-motion mechanism and an immobilizer function has been demanded. However, in a steering lock device having a two-motion mechanism, a key must be pressed at least in an ACC position in order to perform an operation of pressing the key. In order to prevent the key head of the key from coming into contact with the steering lock device when the key is pressed, the distance between the key head and the steering lock device needs to be at least larger than the amount of the key pressed. However, when the immobilizer function is employed in the steering lock device having the two-motion function, the communication performance is increased because the distance between the transmitting device built in the key head and the coil antenna provided in the housing of the steering lock device is large. There was a problem that was not good.
[0010]
In view of the above circumstances, an object of the present invention is to provide a highly convenient safety device for a steering lock device that can prevent an erroneous operation and reliably operate an engine.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a first aspect of the present invention has a projection on an outer peripheral portion protruding toward a pressing direction of a key, and the locking position, the ACC position, the ON position, and the A key cylinder rotatably disposed in a housing at a start position, an urging member for elastically rotating the key cylinder from an on position to a start position and then returning to an on position, and the key; An ignition switch that is switched in conjunction with a cylinder, and a fitting groove that allows the protrusion to move in a key pushing direction at least at a start position in the housing; and the key cylinder is provided in the fitting groove. The contact portion for preventing the return rotation of the key cylinder at the key pressing position within a predetermined range before the elastically returns from the start position to the ON position and rotates. Only was there as a constituent.
[0012]
According to a second aspect of the present invention, when the key cylinder is formed with a pushing portion protruding toward the key pulling direction and having a slope on the side of the start position and rotating the key cylinder from the ON position to the start position. And a guide portion which comes into contact with the pressing portion and moves the key cylinder in a key pressing direction.
[0013]
According to a third aspect of the present invention, the return rotation of the key cylinder from the ACC position to the lock position is prevented, and the return rotation to the lock position is possible by moving the key cylinder in the key pressing direction at the ACC position. A steering lock mechanism, and a slider member disposed on the outer peripheral portion of the key cylinder and urged in a key pushing direction and housed in the housing so as to be movable within a predetermined range, On the lock position direction side, a locking surface which abuts on the slider member and prevents the key cylinder from rotating from the ACC position to the lock position is formed. When the key cylinder is rotated from the lock position to the ACC position, A configuration in which the key cylinder is rotatable by moving the slider member against a biasing force in a key pull-out direction by an inclined surface of the pushing portion. And Aru.
[0014]
A fourth invention is a transmitting device that is built in a key head of the key and transmits a return signal including unique information of the key in response to a transmission signal from a transmitting / receiving device mounted on a vehicle; Around the key insertion hole, a coil antenna that is integrally attached to the housing and transmits the transmission signal and receives the return signal is provided.When the key cylinder is turned to the start position, the transmission device transmits the transmission signal. Only when the transmitted return signal is a specific signal, a determination means for permitting the start of the engine is provided.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view of a steering lock device according to the present invention, and FIG. 2 is a sectional view taken along line 2A of FIG. In FIG. 2, the right side is referred to as “front” and the left side is referred to as “back”.
[0016]
Reference numeral 1 denotes a steering lock device. As will be described later, a key 3 is inserted into a key insertion hole 2 formed in a key cylinder 9 and then the key 3 is rotated to operate the lock position, the ACC position, the ON position, and the start position. The key cylinder 9 is rotated to the position. A transmitting device 5 is incorporated in the key head 4 of the key 3 so as to modulate a predetermined password and transmit and output the same as an electromagnetic wave. Reference numeral 6 denotes a housing of the steering lock device 1, which is integrally formed of a metal material such as zinc or aluminum. On the front surface of the housing 6, a coil antenna 7 for receiving an electromagnetic wave transmitted and output from the transmitting device 5 is housed and mounted in a resin case. Reference numeral 8 denotes a substantially cylindrical cylinder outer, which is fixed to and accommodated in the front end of the housing 6. Reference numeral 9 denotes a cylindrical key cylinder, which is housed in the cylinder outer 8 so as to be rotatable and slidable in the axial direction. Reference numeral 10 denotes a slider member which is slidably accommodated in the internal space of the cylinder outer 8 and is urged rearward by a spring 11. Reference numeral 12 denotes a plate-shaped tumbler, and a plurality of tumblers are arranged in the key cylinder 9 so as to be aligned. Reference numeral 13 denotes a camshaft, which is connected to the rear end of the key cylinder 9, and a cam 14 is integrally formed with the camshaft 13. Reference numeral 15 denotes a return spring, one end (not shown) of which is inserted into the camshaft 13, and the other end 15 a of which is located in the recess 6 a in the housing 6. The return spring 15 constantly urges the key cylinder 9 forward, and as described later, the return spring 15 urges the key cylinder 9 in the direction of arrow A from the ON position to the start position. . A lock member 16 is slidably disposed and is urged by a spring 17 in a direction toward an unillustrated steering shaft (upward in FIG. 2). Reference numeral 18 denotes an ignition switch, which is connected to the rear end of the camshaft 13. Reference numeral 19 denotes a transmitting / receiving device, and reference numeral 20 denotes a judging means.
[0017]
The shape of the key cylinder 9 will be described with reference to FIG. 3 (A) is a left side view of FIG. 3 (B), FIG. 3 (B) is a front view of the key cylinder 9, and FIG. 3 (C) is a right side view of FIG. 3 (B). As shown in FIG. 3 (A), the key cylinder 9 is provided with a protruding portion 9a projecting rearward, and as described later, returns to the on position after the key cylinder 9 is turned to the start position. At this time, the protrusion 9a comes into contact with the contact portion 6c of the fitting groove 6b formed in the housing 6. Further, as shown in FIGS. 3B and 3C, the key cylinder 9 is formed with a pushing portion 9b toward the front. An inclined surface 9c is formed on one end surface of the pushing portion 9b, and a locking surface 9d is formed on the other end surface. The inclined surface 9c faces the start position direction side, and the locking surface 9d faces the lock position direction side. As will be described later, when the key cylinder 9 is rotated from the lock position to the ACC position, and when the key cylinder 9 is rotated from the ACC position to the lock position, the pushing portion 9b comes into contact with the slide member 10 and the key cylinder 9 is turned on. When rotating from the position to the start position, the pushing portion 9b comes into contact with the guide portion 8a formed on the cylinder outer 8.
[0018]
The operation of the steering lock device 1 having the above configuration will be described with reference to FIG. The tumbler 12 disposed in the key cylinder 9 is urged by a spring (not shown) in the outer peripheral direction of the key cylinder 9, and the end of the tumbler 12 always projects from the outer peripheral surface of the key cylinder 9. is there. In this state, the end engages with a lock groove (not shown) formed on the inner surface of the cylinder outer 8, and the rotation of the key cylinder 9 in the cylinder outer 8 is prevented. When the user inserts the regular key 3 through the key insertion hole 2 on the front end face of the key cylinder 9, each tumbler 12 moves inside the key cylinder 9 against the urging force, and the end of the tumbler 12 is The key cylinder 9 is retracted from the outer peripheral surface to release the engagement with the lock groove, whereby the key cylinder 9 is allowed to rotate in the cylinder outer 8. When the key cylinder 9 is in the lock position, the tip of the lock member 16 projects and engages with a recess of a steering shaft (not shown), whereby the steering shaft is locked. When the camshaft 13 connected to the key cylinder 9 is rotated with the rotation of the camshaft 13, the lock member 16 is pushed down in FIG. 2 by the cam 14 integrally formed with the camshaft 13. The engagement of the tip of the lock member 16 with the recess of the steering shaft is released, the steering shaft is unlocked, and the steering lock is released.
[0019]
The operation of rotating the key cylinder 9 from the lock position to the ACC position will be described. 4A is a cross-sectional view taken along the line 4A of FIG. 1 at the lock position, and FIG. 4B is a cross-sectional view illustrating the ACC position of FIG. 4A. When rotating the key cylinder 9 from the lock position to the ON position, when the key 3 is operated in the direction of arrow B, the inclined surface 9c of the pushing portion 9b formed on the key cylinder 9 engages with the slider member 10, The slider member 10 is pushed by the inclined surface 9c of the pushing portion 9b, the slider 10 moves forward against the urging force of the spring 11, and the key cylinder 9 can be turned from the lock position to the ACC position without any trouble. .
[0020]
Thereafter, when the key cylinder 9 is further rotated from the ACC position in the direction opposite to the direction of the arrow A in FIG. The rotation of the return spring 15 is prevented. When the key cylinder 9 is further rotated from the ON position to the start position in the direction opposite to the direction of the arrow A, a restoring force acts on the key cylinder 9 by the return spring 15 in the direction of the arrow A, that is, in the direction of returning to the ON position. .
[0021]
The operation of rotating the key cylinder 9 from the ON position to the start position will be described. FIG. 5A is a cross-sectional view taken along line 5A of FIG. 1 at an on position, and FIG. 5B is a cross-sectional view at a start position of FIG. 5A.
[0022]
From the state where the key cylinder 9 shown in FIG. 5A is in the ON position, the key 3 is operated in the direction of arrow D against the restoring force of the return spring 15 in the rotational direction, and as shown in FIG. When the key cylinder 9 is to be rotated to the start position, the inclined surface 9c of the pushing portion 9b protruding from the key cylinder 9 comes into contact with the guide portion 8a formed on the cylinder outer 8. When the key 3 is further operated in the clockwise direction, the key cylinder 9 is pushed along the inclined surface 9c by the guide portion 8a and moves backward, and at the start position, the pushing portion 9b is pushed as shown in FIG. Ride on the guide section 8a. That is, when the key 3 is rotated in the direction of arrow D from the on position to the start position, the key cylinder 9 is rotated while being pushed backward, and the distance between the key head 4 and the coil antenna 7 at the start position is reduced. The distance d2 is smaller than the distance d1 between the key head 4 and the coil antenna 7 at the ON position by the height of the pushing portion 9b.
[0023]
In the steering lock device 1 having the immobilizer function, when the key cylinder 9 is turned to the start position, the transmission device 5 built in the key head 4 of the key 3 and the coil antenna 7 of the steering lock device 1 are moved. , And it is configured to determine whether the passwords match or not, and selectively output a start permission signal to the engine start unit. In the steering lock device 1 according to the embodiment of the present invention, when performing communication between the transmitting device 5 and the coil antenna 7, communication is performed at a distance d2 that is shorter than the distance d1 at the ON position. For this reason, in the communication performance in the immobilizer function, the same communication performance as that of the steering lock device without the two-motion mechanism can be secured.
[0024]
In addition, since the key cylinder is pushed by the same operation as the conventional operation of rotating the key cylinder, the user is not required to perform any special operation, which is convenient. Further, the pushing portion 9b of the key cylinder 9 is not specially provided, but is conventionally used for locking with the slide member 10 in a steering lock device having a two-motion mechanism. The number of parts does not change and does not increase the cost.
[0025]
When the key cylinder 9 is rotated to the start position, signals are transmitted and received between the transmitting / receiving device 19 and the transmitting device 5 incorporated in the key head 4 through the coil antenna 7, and the electromagnetic wave transmitted from the transmitting device 5 is transmitted. The determination means 20 determines whether or not the passwords extracted from the password match or not. If it is determined that the passwords match, a start permission signal is output to the ignition switch 18, and the ignition switch 18 is operated to start the engine.
[0026]
Next, the operation of returning the key cylinder 9 from the start position to the ON position will be described. 6A is a cross-sectional view taken along the line 4A of FIG. 1 at the ON position, FIG. 6B is a cross-sectional view at the start position of FIG. 6A, and FIG. 6C is a key in the state of FIG. FIG. 7A is a cross-sectional view taken along line 7A of FIG. 6B, and FIG. 7B is a cross-sectional view taken along line 7B of FIG. 6C.
[0027]
When the key 3 is operated in the direction of arrow E against the restoring force of the return spring 15 in the rotation direction from the state where the key cylinder 9 shown in FIG. 6A is in the on position, the key cylinder 9 is moved rearward as described above. It is rotated while being pushed in, and at the start position, the protruding portion 9a of the key cylinder 9 moves into the fitting groove 6b of the housing 6 as shown in FIGS. 6B and 7A. When the user releases the key 3 at this start position, the key cylinder 9 automatically returns from the start position to the ON position in the direction of arrow F due to the restoring force of the return spring 15 in the rotational direction. At this time, FIG. As shown in FIG. 7 (B), the protruding portion 9a located in the fitting groove 6b at the start position comes into contact with the contact portion 6c of the fitting groove 6b, and the key cylinder 9 moves in the direction of arrow F ( The force that rotates in the counterclockwise direction in FIG. 7B is received by the contact portion 6c. Since the key cylinder 9 is constantly urged forward by the return spring 15, the key cylinder 9 is in the ON position shown in FIG. 6A after the protrusion 9a comes into contact with the contact portion 6c. Return to.
[0028]
As described above, since the protrusion 9a of the key cylinder 9 is brought into contact with the contact portion 6c of the fitting groove 6b before the key cylinder 9 automatically returns from the start position to the ON position, the user can use the key. Even when the return force of the return rotation of the key cylinder 9 is too strong, such as when the hand is suddenly released from 3 or when it is returned and rotated by hand at once, or when the return load of the return spring is uneven, In addition, it is possible to prevent an erroneous operation in which the key cylinder 9 suddenly rotates to the ACC position after passing through the ON position and the started engine stops.
[0029]
The operation when the user stops the engine and pulls out the key 3 from the key cylinder 9 will be described with reference to FIGS. 4 (B), 4 (C) and 7 (C). FIG. 4C is a cross-sectional view showing a state in which a key is pressed at the ACC position in FIG. 4B, and FIG. 7C is a cross-sectional view taken along line 7C in FIG. 4C. When the key cylinder 9 at the ON position is returned to the ACC position and rotated, the state shown in FIG. When rotated to the ACC position, the locking surface 9d of the pushing portion 9b formed on the key cylinder 9 comes into contact with the slider member 10. However, since the locking surface 9d of the pushing portion 9b is not an inclined surface, the slider member 10 cannot be pushed away, and the pushing portion 9b is locked to the slider member 10, and the key cylinder 9 moves in the direction of arrow C. The above return rotation is prevented. Here, as shown in FIG. 7 (C), a groove 6d is formed in the housing 6, so that when the key cylinder 9 is pushed backward at the ACC position, the projection 9a does not come into contact with the housing 6. It has been like that. When the key 3 is pushed in the ACC position, the key cylinder 9 moves rearward as shown in FIG. 4C, and the engagement of the pushing portion 9b with the slider member 10 is released. When the key cylinder 9 is turned in the direction of arrow C after the operation of pushing the key cylinder 9 backward at the ACC position in this manner, the key cylinder 9 can be returned from the ACC position to the locked position and turned. The key 3 can be pulled out of the key cylinder 9 in the locked position.
[0030]
【The invention's effect】
As is apparent from the above description, according to the safety device for the steering lock device of the present invention, the protrusion formed on the key cylinder is formed on the housing before the key cylinder automatically returns from the start position to the ON position. Because it is configured to abut against the locking surface of the formed fitting groove, the key cylinder can be used when the user suddenly releases his / her hand, rotates back at once, or when the return load of the return spring varies. Even if the return force of the return rotation is too strong, it is possible to prevent the key cylinder from rotating past the ON position and rotating to the ACC position at a stroke, thereby preventing an erroneous operation in which the started engine stops.
[0031]
Further, as in the second invention, a guide portion for moving the key cylinder in the key pressing direction is provided, and the key cylinder is rotated by bringing the pressing portion formed on the key cylinder into contact with the guide portion. Since the key cylinder is depressed by the same operation as described above, the user is not required to perform any special operation, which is convenient.
[0032]
Further, as in the third invention, the pushing portion is not specially provided, but is conventionally used for locking with a slide member in a steering lock device provided with a two-motion mechanism. However, the number of parts does not change and the cost does not increase.
[0033]
On the other hand, when communication is performed between the transmitting device and the coil antenna as in the fourth invention, communication is performed at a shorter distance than a conventional steering lock device having a two-motion mechanism. In terms of performance, communication performance equivalent to that of a steering lock device without a two-motion mechanism can be secured.
[0034]
[Brief description of the drawings]
FIG. 1 is a front view of a steering lock device according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along line 2A of FIG.
3 (A) is a left side view of FIG. 3 (B), FIG. 3 (B) is a front view of the key cylinder, and FIG. 3 (C) is a right side view of FIG. 3 (B).
4A is a cross-sectional view taken along the line 4A of FIG. 1 at a lock position, FIG. 4B is a cross-sectional view illustrating an ACC position of FIG. 4A, and FIG. 4C is a cross-sectional view of FIG. () Is a cross-sectional view showing a state in which a key is depressed.
5 (A) is a cross-sectional view taken along line 5A of FIG. 1 at an on position, and FIG. 5 (B) is a cross-sectional view at a start position of FIG. 5 (A).
6 (A) is a cross-sectional view taken along the line 4A of FIG. 1 at an on position, FIG. 6 (B) is a cross-sectional view at a start position of FIG. 6 (A), and FIG. 6 (C) is FIG. FIG. 6 is a cross-sectional view showing a state immediately after releasing the hand from the key 3 in the state of FIG.
7A is a sectional view taken along line 7A of FIG. 6B, FIG. 7B is a sectional view taken along line 7B of FIG. 6C, and FIG. 7C is a sectional view of FIG. 4C. It is a 7C line sectional view.
FIG. 8 is a sectional view showing a detent mechanism in the ignition switch.
[Explanation of symbols]
1 Steering lock device
3 key
4 key head
5 Transmission device
6 Housing
6b fitting groove
6c contact part
7 Coil antenna
8 Cylinder outer
8a Guide part
9 Key cylinder
9a protrusion
9b Push-in section
9c Inclined surface
10 Slider member
13 Camshaft
15 Return spring (biasing member)
16 Lock member
18 Ignition switch
19 Transceiver
20 Judgment means

Claims (4)

A key cylinder which has a projecting portion projecting toward the key pressing direction on an outer peripheral portion, and which is disposed in the housing so as to be rotatable to a lock position, an ACC position, an ON position and a start position by the key; After rotating the key cylinder from the ON position to the start position, the biasing member elastically returns to the ON position and rotates, an ignition switch that is switched in conjunction with the key cylinder, and at least the housing At the start position, there is provided a fitting groove which enables the protrusion to move in the key pressing direction.The fitting groove includes a position until the key cylinder elastically returns from the start position to the ON position and rotates. The steering lock device according to claim 1, further comprising a contact portion for preventing return rotation of the key cylinder at a key pressing position within a predetermined range. Apparatus. A push portion protruding toward the key withdrawal direction and having a slope on the side of the start position is formed on the key cylinder, and the push portion is pressed against the push portion when the key cylinder is turned from the ON position to the start position. The safety device for a steering lock device according to claim 1, further comprising a guide portion that comes into contact with and moves the key cylinder in a key pushing direction. A steering lock mechanism that prevents return rotation of the key cylinder from the ACC position to the lock position and moves the key cylinder in the key pressing direction at the ACC position to enable return rotation to the lock position; A slider member disposed on the outer peripheral portion of the key cylinder and urged in a key pressing direction and housed in the housing so as to be movable within a certain range, and a lock position direction side of the pressing portion is Forming a locking surface that abuts against the slider member to prevent the key cylinder from rotating from the ACC position to the locked position, and that when the key cylinder is rotated from the locked position to the ACC position, The key cylinder is rotatable by moving the slider member in a key pulling-out direction against a biasing force by a surface. Safety device of the steering lock device according to 1 or claim 2. A transmitting device that is built in the key head of the key and transmits a return signal including unique information of the key in response to a transmission signal from a transmitting / receiving device mounted on a vehicle, and around a key insertion hole of the key cylinder, A coil antenna that is attached to the housing and transmits the transmission signal and receives the return signal is provided, and a return signal transmitted from the transmission device when the key cylinder is rotated to a start position is provided. The safety device for a steering lock device according to any one of claims 1 to 3, further comprising determining means for permitting engine start only when the signal is a specific signal.

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