JP2000225922A - Steering lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent turning of a cam shaft in a lock body by providing a closing member which is removed from between a blocking member and the engagement part caused by that a key cylinder is removed from the lock body so as to allow movement of a lock pin to engage with an engaging hole. SOLUTION: When a side of key cylinder is broken, a lock body 12 is broken at a broken groove part 12, and a second inner cavity portion containing a locking step is removed together with the key cylinder. However, when a front part is removed form the locking step of the body 12, a closing plate is removed together with the locking step from between a lock pin 42 and a hole engaging therewith 40. Thereby, the pin 42 is pushed by a coil spring 43 to move a side of cam shaft 14 and engages with the hole 40. Accordingly, the cam shaft 14 is surely prevented from turning, and then a lock bar 16 is fitted into a recess of a steering shaft so that it is held in a locked condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering lock device for locking a steering shaft and a steering wheel in a state where a key rotor of a key cylinder is turned to a locked position.

[0002]

2. Description of the Related Art Generally, in a steering lock device of an automobile, a key lock of a key cylinder housed in a lock body is locked by a key.
When the key is turned to the position and the key is removed from the key rotor, the lock bar engages with the steering shaft side to lock the rotation of the steering shaft and thus the steering wheel.

Then, a key is inserted into the key rotor and the key rotor is moved to an operation position ("ACC", "ON", "STAR").
When the rotation operation is performed to the "T" position), the lock bar is moved by the cam portion of the cam shaft which rotates integrally with the key rotor. As a result, the engagement between the lock bar and the steering shaft is released, and the lock on the steering shaft and, consequently, the steering wheel is released. Further, an ignition switch is also operated with the rotation of the camshaft.

[0004] Therefore, this type of steering lock device is an effective means for preventing theft because the steering wheel and the ignition switch cannot be operated unless a proper key is inserted into the key cylinder.

However, in such a steering lock device, in a locked state of the steering shaft, the key cylinder is detached from the lock body by some method, or the front portion of the lock body is broken, so that the key cylinder is disengaged from the lock body. When removed,
The camshaft is exposed in the lock body, and the camshaft can be turned.

In order to cope with such a problem, the present applicant has proposed a steering lock device disclosed in, for example, Japanese Patent Application Laid-Open No. 8-104202. In this steering lock device, an engaging body having an engaging groove is provided so as to rotate integrally with a camshaft, and a regulating lever is movably provided in an axial direction on a body, and is biased toward a key cylinder by a biasing means. When the key cylinder is housed in the lock body, the key cylinder is pressed by the key cylinder and moved to the restriction position, and when the key cylinder is removed from the lock body, the key cylinder is moved to the restriction release position. ing. In addition, the blocking member is movably provided on the body, and is urged in the direction of engagement with the engaging groove by the urging means, and the engagement with the engaging groove is released based on the movement of the regulating lever to the regulating position. With the cam shaft rotated to the locked position while being held at the disengaged position, the restricting lever moves to the engaging position to engage with the engaging groove as the restricting lever moves to the deregulated position, thereby turning the engaging body. The lock piece is movably provided on the body, and the blocking member is moved to the locking position by the urging force of the urging means as the blocking member moves to the engagement position, so that the blocking member moves toward the disengagement position. It is configured to prevent movement.

In this steering lock device, in a normal state in which the key cylinder is housed in the body, the regulating lever is pressed by the key cylinder and is held at the regulation releasing position. When the key cylinder is disengaged from the body in any way while the steering shaft is locked, the regulating lever moves to the regulating position by the urging force of the urging means, and the blocking member is engaged by the urging force of the urging means. The engagement member engages with the engagement groove of the engagement member, and the engagement prevents the rotation of the engagement member and thus the camshaft. At this time, the lock piece is moved to the locked position by the urging force of the urging means, and the blocking member is prevented from moving toward the disengagement position.

[0008]

However, the steering lock device described above requires many parts such as a regulating lever, a blocking member, a lock piece, and an urging means for urging these components. There is a problem that the cost increases. Further, since the regulating lever is provided so as to be movable in the axial direction of the body, there is a problem that the size of the body in the axial direction increases, and the steering lock device becomes large.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a camshaft in a lock body when a key cylinder is detached from a lock body or a key cylinder side of the lock body is broken. It is an object of the present invention to provide a steering lock device that can reliably prevent the rotation of the steering lock, can suppress an increase in manufacturing cost, and can suppress an increase in size.

[0010]

According to a first aspect of the present invention, there is provided a lock body attached to a vehicle, and a cam shaft having a cam portion on an outer peripheral portion and rotatably provided in the lock body. A key cylinder rotatably operated by a key, housed in a front part in the lock body, and in the housed state, the key rotor connected to rotate integrally with the camshaft; A lock member provided so as to be moved by the cam portion with rotation of a camshaft, and locking a steering shaft in a state where the key rotor is rotated to a locking position; and any one of the camshaft and the lock body. An engagement recess formed in one of the camshafts and the lock body; A blocking member urged in a direction to be engaged with the engagement recess by a step, and the blocking member and the engagement recess attached to the key cylinder side with the key cylinder being housed in the lock body. The lock member is disposed between the lock member and the lock member to prevent the lock member from moving toward the engagement recess, and is removed from between the lock member and the engagement recess as the key cylinder side is removed from the lock body. A gist of the present invention is a steering lock device including a closing member that allows movement to the engagement concave side.

According to this configuration, when the key cylinder side is removed from the lock body, the closing member is removed from between the blocking member and the engaging recess. Therefore, the blocking member is moved by the urging means and engages with the engagement recess. Since the rotation of the camshaft is reliably prevented by this engagement, the locked state of the steering shaft cannot be released.

According to a second aspect of the present invention, in the steering lock device according to the first aspect, a break groove for setting a break position is formed in the lock body, and the closing member is configured to lock the lock member more than the break groove. The gist is that it is attached to the front side of the body.

According to this structure, in addition to the function of the first aspect, when the lock body is broken, the lock body is broken at the breaking groove. Then, the closing member is securely removed together with the broken portion of the lock body, and the blocking member is moved by the urging means to engage with the engagement recess. Due to this engagement, the rotation of the camshaft is reliably prevented, and the locked state of the steering shaft cannot be released.

According to a third aspect of the present invention, in the steering lock device according to the first aspect, the closing member is attached to the key cylinder. According to this configuration, in addition to the function of the first aspect, when the key cylinder is removed from the lock body, the closing member is securely removed together with the key cylinder, and the blocking member is moved by the urging means to move into the engagement recess. Engage. Due to this engagement, the rotation of the camshaft is reliably prevented, and the locked state of the steering shaft cannot be released.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment in which the present invention is embodied in an automobile steering lock device will be described below with reference to FIGS.

FIG. 1 is a sectional view of the steering lock device 11. In this specification, the insertion opening side of the key K with respect to the key cylinder 13 is referred to as front, and the opposite side is referred to as rear.

The steering lock device 11 includes a lock body 12, a key cylinder 13, a cam shaft 14, a lock stopper 15, a lock bar 16, and a coil spring 1.
8, the lid 19 and the like.

The lock body 12 includes a cylinder housing cylinder 20 having a bottomed cylindrical shape, and a lock bar housing cylinder 21 which is orthogonally connected to the cylinder housing cylinder 20. A first bore portion 22 having a circular cross section for accommodating the camshaft 14 is formed on the rear side of the cylinder housing tube portion 20, and a second cavity 22 for accommodating the key cylinder 13 is provided on the front portion.
A lumen 23 is formed. The first lumen portion 22 has a small diameter with a circular cross section, and the second lumen portion 23 has a large diameter with a circular cross section. First lumen 2
An engagement step 24 is formed between the second cavity 2 and the second lumen 23.

A guide hole 25 having a quadrangular cross section is bored in the lock bar storage tube portion 21 so as to be orthogonal to the first lumen portion 22, and the guide hole 25 and the first lumen portion are formed. 22 is communicated. The base end of the guide hole 25 communicates with an opening 25 a provided in the lock body 12. The distal end of the guide hole 25 is opened, and communicates with the inside of the steering post when the lock body 12 is attached to a steering post (not shown). A lock hole 26 having a rectangular cross section and a depth that does not reach the first lumen 22 is formed in the lock bar storage cylinder 21 in the vicinity of the guide hole 25. Then, the lid 19 is fitted with the fitting projection 27 formed in the front part thereof in the fitting hole 2.
6, it is fixed so as to close the opening 25 a of the guide hole 25.

The key cylinder 13 is housed in the second lumen 23. The housing 30 of the key cylinder 13 is formed in a tubular shape, and a crowned tubular member 32 with a cover is fitted around the front outer periphery of the housing 30. The housing 30 is fixed in the second lumen 23. A circular hole 33 is formed at the center of the crown 32 so that the key K can be inserted therethrough.

In the housing 30, a key rotor 31 is provided.
Is supported. A tumbler composed of a large number of thin plates is arranged on the key rotor 31.
When the regular key K is inserted along the center axis of the key cylinder 13, the lock is released because the unevenness provided on the key K matches each tumbler, and the key rotor 31 inside the housing 30 moves with respect to the housing 30. It has a known structure capable of reciprocating rotation in the lock release direction and the anti-lock release direction. That is, when the key rotor 31 is unlocked, the LOCK position is set as the original position, and from this position, the ACC (accessory contact) position and the ST position.
(Starter contact) can be rotated in the unlocking direction to the position, and can be turned from the ST position or the ACC position to the LO position.
Rotation in the anti-lock release direction toward the CK position is enabled.

As shown in FIGS. 1 and 2, a fitting projection 34 having a rectangular cross section is formed at the rear of the key rotor 31. The fitting protrusion 34 has a camshaft 14
Are fitted in fitting holes (not shown) provided on the front surface thereof, and are rotatable integrally with the key rotor 31.

The camshaft 14 is formed in a substantially cylindrical shape.
A cam 35 is provided on the rear side. The camshaft 14 is disposed so that its cam 35 is located in the guide hole 25, and a shaft 37 protruding from the rear of the camshaft 14 is rotatably supported by the rear side wall of the guide hole 25. I have. The shaft portion 37 is inserted into a starter switch housing 38 provided at a rear portion of the lock body 12 located rearward of the lock bar storage tube portion 21. Then, it is connected to a movable contact (not shown) in the starter switch housing 38.

Guide hole 2 of lock bar storage cylinder 21
A lock stopper 15 having a substantially square frame shape is slidably fitted in the guide hole 25 along the guide hole 25. A lock bar 16 having a quadrangular prism shape is slidably fitted in the guide hole 25 along the guide hole 25. An engagement groove 16a is formed at the base end of the lock bar 16, and a frame 15b of the lock stopper 15 facing the steering post is fitted into the engagement groove 16a. The lock bar 16 and the lock stopper 15 move integrally.

The cam 35 of the camshaft 14 is inserted into the lock stopper 15 within its frame. The cam 3 associated with the rotation of the cam shaft 14
The lock stopper 15 moves in the guide hole 25 by the rotation of the lock 5. At this time, as shown in FIG. 1, when the lock stopper 15 is not lifted, the lock bar 16 has its tip end protruding into a steering post (not shown), and is connected to a steering shaft (not shown) disposed in the steering post. The steering shaft is locked into a recess (not shown) provided to disable steering. When the lock stopper 15 is raised as shown in FIG. 2, the lock bar 16 has its tip end withdrawn from the steering post, and a concave portion (not shown) provided on a steering shaft (not shown) in the steering post. ) And unlocks the steering shaft to enable steering.

The frame 15a of the lock stopper 15 and the lid 1
9, a coil spring 18 is arranged to urge the lock bar 16 through the lock stopper 15 in the lock direction.

The fitting projection 27 of the lid 19 is provided with a housing recess 41 which opens on the lower surface side. A lock pin 42 as a blocking member is accommodated in the accommodation recess 41 so as to be movable in the radial direction of the lock body 12, and a tip end of the lock pin 42 is attached to the fitting recess 2.
6 is inserted into a through hole 44 provided in the inside. The lock pin 42 is urged toward the camshaft 14 by a coil spring 43 as an urging means interposed between the base end of the lock pin 42 and the bottom surface of the accommodation recess 41.

An engagement hole 40 is formed on the outer peripheral surface of the camshaft 14 at a position corresponding to the lock pin 42 as an engagement recess. Further, the lock body 12
Inside, a closing plate 45 as a closing member is attached to the locking step portion 24 by caulking 46.
The closing plate 45 has a lateral L-shape and extends from the locking step portion 24 to a position beyond the through hole 44. The closing plate 45 is disposed between the lock pin 42 and the engagement hole 40 to close the engagement hole 40 and prevent the lock pin 42 from protruding into the first lumen 22.

On the outer peripheral portion of the lock body 12, an annular breaking groove 12a is formed on the front side of the lid 19 and on the rear side of the locking step portion 24. The break groove 12a is formed so that the lock body 12 is located at a break position in the event that the lock body 12 is broken. Function is not lost.

The operation of the steering lock device constructed as described above will now be described. FIG. 1 shows a state in which the proper key K of the vehicle is not inserted. In this state, the key rotor 27 of the key cylinder 13
It is located at the K position. At this time, the lock stopper 15
Is not lifted, the tip of the lock bar 16 protrudes into a steering post (not shown), and is engaged with a recess (not shown) provided in a steering shaft (not shown) disposed in the steering post. ,
The steering shaft is in a locked state in which steering is disabled.

In this state, when the regular key K is inserted into the key cylinder 13 and the unevenness provided on the key K matches each tumbler of the key rotor 31, the lock is released, and the key rotor 31 inside the housing is removed. 30 can be rotated in the unlocking direction.

Then, from the state shown in FIG.
When the turning operation is performed from the K position to the ACC position side, that is, the turning operation in the unlocking direction, the camshaft 14 is turned in the same direction via the key rotor 31 and is located at the unlocking position. Then, by the cam action of the cam 35 of the camshaft 14, the lock stopper 15 is lifted against the urging force of the coil spring 18, and the lock stopper 15 is moved in the unlocking direction (the base end side of the guide hole 25 (see FIG. 2). , Upper side)).

As a result, the tip of the lock bar 16 connected to the lock stopper 15 is withdrawn from the steering post (not shown) and moves from the locked position to the unlocked position. A recess (not shown) provided on a steering shaft (not shown) in the steering post
From the steering shaft.

Thereafter, even when the key K is turned from the ACC position to the ST position, or the key K is turned from the ACC position to the LOCK position,
When the lock stopper 15 is not removed from the key cylinder 13, the lock stopper 15 is lifted and held as shown in FIG.
The lock bar 16 will be held in the unlocked position.

Further, the key K is moved from the ACC position to the LOCK position.
When the key K is removed from the key cylinder 13 in the state shown in FIG. 1 after the turning operation of the lock lever 16 is performed, the lock bar 16 is pressed by the coil spring 18 via the lock stopper 15, and the lock bar 16 Move to position. That is, the tip end of the lock bar 16 is projected into a steering post (not shown), and engages with a concave portion (not shown) provided in a steering shaft (not shown) disposed in the steering post. Is locked.

In the locked state of the steering shaft, as shown in FIG.
That is, when the key cylinder 13 side is broken, the lock body 12 is broken at the break groove portion 12a, the portion of the second lumen portion 23 including the locking step portion 24 is removed together with the key cylinder 13, and the camshaft 14 is And the camshaft 14 can be rotated.

However, the locking step 2 of the lock body 12
When the front part is removed from 4, the closing plate 45 together with the locking step 24 is removed from between the lock pin 42 and the engagement hole 40. Therefore, the lock pin 42 is pressed by the coil spring 43 and moves to the camshaft 14 side, and is engaged in the engagement hole 40. Therefore, the rotation of the camshaft 14 is reliably prevented by the lock pin 42, and the lock bar 16 is engaged with a concave portion (not shown) of the steering shaft, and the steering shaft is held in a locked state. As a result, the operation of the steering wheel and the operation of the ignition switch cannot be performed, and theft of the vehicle can be prevented.

According to the present embodiment, the following operation and effect can be obtained. A lock pin 42 is attached to the lid 19 fitted to the lock body 12 by a coil spring 43 to the camshaft 14.
Engaging toward the side, an engagement hole 40 was formed in the camshaft 14 at a position corresponding to the lock pin 42. The lock body 12 is formed with a break groove 12a so that when the lock body 12 is broken, it is broken at the break groove 12a. When the lock body 12 is broken at the break groove portion 12a, the closing plate 45 disposed between the lock pin 42 and the engagement hole 40 is locked by the lock body 1.
2 so as to be removed together with the front side (locking step 24) of the break groove 12a of the lock body 12
The lock pin 42 is engaged with the engagement hole 40 at the time of destruction, so that the rotation of the camshaft 14 can be reliably prevented.

The mechanism for preventing the rotation of the camshaft 14 is provided by a breaking groove 12 formed in the lock body 12.
a, an engagement hole 40 formed in the camshaft 14, a lock pin 42 and a coil spring 43 housed in the lid 19, and a closing plate 45. Can be prevented from increasing in production cost.

Furthermore, since the closing plate 45 is configured to be removed together with a part of the lock body when the lock body 12 is broken, an increase in the size of the lock body 12 in the axial direction can be suppressed, and the steering lock device is provided. 11 can be suppressed from being enlarged.

(Second Embodiment) Next, a steering lock device according to a second embodiment of the present invention will be described with reference to FIG. Note that, for convenience of description, the same members as those in the steering lock device 11 of the first embodiment, or corresponding components, are denoted by the same reference numerals.

The steering lock device 50 of the present embodiment
, The camshaft 14 is provided with a housing recess 51 that opens on the outer peripheral surface side. A lock pin 52 as a blocking member is provided in the accommodation recess 51 in the camshaft 1.
4, that is, the lock pin 52 is movably accommodated in the radial direction of the lock body 12. It is urged toward the first lumen portion 22 side of the storage tube portion 20.

An engagement hole 54 as an engagement recess is formed at a position corresponding to the lock pin 52 on the inner peripheral surface of the first lumen portion 22 of the cylinder housing cylinder portion 20. Further, in the lock body 12, a closing plate 55 as a closing member is caulked 56 against the outer peripheral surface of the key rotor 31.
It is attached by. The closing plate 55 extends along the outer peripheral surface of the camshaft 14 from the inner end of the key rotor 31 to a position beyond the housing recess 51. The closing plate 55 includes the lock pin 52 and the engagement hole 54.
The engagement hole 54 is disposed therebetween to close the engagement hole 54 and prevent the lock pin 52 from projecting from the camshaft 14 into the first lumen 22.

In the steering lock device 50 constructed as described above, when the key cylinder 13 is housed in the lock body 12, as in the case of the steering lock device 11 of the first embodiment, a regular lock is provided. Key K
Is used to unlock the steering shaft, and the key is removed to lock the steering shaft.

In the locked state of the steering shaft, when the lock body 12 is broken at the break groove 12a, the key cylinder 13 is removed together with a part of the lock body 12, or only the key cylinder 13 is moved to the front end of the lock body 12. When the camshaft 14 is removed from the lock portion, the camshaft 14 is exposed in the lock body 12, and the camshaft 14 can be rotated.

However, when the key cylinder 13 is removed, the closing plate 55 is removed from between the lock pin 52 and the engagement hole 54 together with the key cylinder 13. Therefore, the lock pin 52 is pressed by the coil spring 53 and moves toward the first cavity 22, and engages with the engagement hole 54. Therefore, the rotation of the camshaft 14 is reliably prevented by the lock pin 52, and the lock bar 16 is engaged with a concave portion (not shown) of the steering shaft, and the steering shaft is held in a locked state. as a result,
The operation of the steering wheel and the operation of the ignition switch are also disabled, and theft of the vehicle can be prevented.

According to the present embodiment, the following operation and effect can be obtained. A lock pin 52 is urged toward the first lumen portion 22 of the cylinder housing cylinder portion 20 by the coil spring 53 on the camshaft 14, and the lock pin 52 is moved to a position corresponding to the lock pin 52 on the first lumen portion 22. An engagement hole 54 was formed. When the key cylinder 13 is detached from the lock body 12 together with a part of the lock body 12 or alone, the closing plate 5 disposed between the lock pin 52 and the engagement hole 54.
5 is removed, the lock pin 52 is engaged with the engagement hole 54 when the key cylinder 13 is detached from the lock body 12, so that the rotation of the camshaft 14 is reliably prevented. it can.

The mechanism for preventing the rotation of the camshaft 14 is provided by a lock pin 5 housed in the camshaft 14.
2 and the coil spring 53, the engagement hole 54 formed in the lock body 12, and the closing plate 55, so that the manufacturing cost of the steering lock device 50 can be suppressed. .

Further, since the closing plate 55 is configured to be removed together with the key cylinder 13 when the key cylinder 13 is removed from the lock body 12, an increase in the axial size of the lock body 12 can be suppressed. In addition, an increase in the size of the steering lock device 11 can be suppressed.

The above embodiments can be modified as follows. In the above embodiments, the break groove 12 a formed on the outer peripheral surface of the lock body 12 is formed in an annular shape, but a plurality of recesses are formed on the same circumference at predetermined intervals with respect to the outer peripheral surface of the lock body 12. Is also good.

Next, other technical ideas that can be grasped from the above embodiment will be described below. (A) In the steering lock device according to any one of claims 1 to 3, the engagement recess is formed on an inner peripheral surface of the lock body, and the blocking member is a housing recess formed on the camshaft. A steering lock device that is biased and housed inside.

(B) In the steering lock device according to any one of claims 1 to 3, the engaging recess is formed on an outer peripheral surface of the camshaft, and the blocking member is an inner peripheral surface of the lock body. The steering lock device is biased and housed in the housing recess formed in the vehicle.

[0053]

According to the invention described in any one of claims 1 to 3, when the key cylinder is detached from the lock body or the key cylinder side of the lock body is broken, the lock body is The rotation of the inner camshaft can be reliably prevented, the increase in manufacturing cost can be suppressed, and the size can be suppressed.

According to the invention described in claim 2, according to claim 1
In addition to the above-mentioned effects, the breaking position of the lock body can be set, and when the lock body is broken, the closing member can be reliably removed, and the rotation of the cam shaft in the lock body can be reliably prevented. .

According to the third aspect of the present invention, the first aspect is provided.
In addition to the effects described above, when the key cylinder is removed from the lock body, the closing member can be reliably removed, and the rotation of the camshaft in the lock body can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a steering lock device according to a first embodiment when a key is inserted into a key cylinder.

FIG. 2 is a sectional view of the steering lock device when a key is rotated.

FIG. 3 is a cross-sectional view of the steering lock device near an engagement hole of a camshaft.

FIG. 4 is a sectional view of the steering lock device when the lock body is broken.

FIG. 5 is a sectional view of a steering lock device according to a second embodiment.

[Explanation of symbols]

13 ... key cylinder, 14 ... camshaft, 16 ... lock bar as lock member, 31 ... key rotor, 35 ...
Cam portions, 40, 54 ... engaging holes as engaging concave portions, 42,
52: a lock pin as a blocking member; 43, 53: a coil spring as a biasing means; 45, 55: a closing plate as a closing member; K: a key.

Claims (3)

[Claims] A lock body attached to a vehicle, a cam shaft having a cam portion on an outer peripheral portion and rotatably provided in the lock body, and a key rotor rotated by a key. A key cylinder housed at a front portion in the lock body and connected so that the key rotor rotates integrally with the camshaft in the housed state, and moved by the cam portion as the camshaft rotates A lock member that locks a steering shaft in a state where the key rotor is turned to a locking position; an engagement recess formed in one of the camshaft and the lock body; and the camshaft. And a direction which is provided movably in the radial direction with respect to one of the lock body and a direction in which the engaging recess is engaged by a biasing means. An urging blocking member, which is attached to the key cylinder side, and which is disposed between the blocking member and the engaging recess when the key cylinder is housed in the lock body; A closure member that prevents movement of the blocking member toward the engagement recess side by removing the key cylinder side from the lock body and removing the blocking member from the engagement recess side when the key cylinder side is removed from the lock body. A steering lock device comprising: 2. The steering lock device according to claim 1, wherein a break groove for setting a break position is formed in the lock body, and the closing member is mounted on a front side of the lock body with respect to the break groove. Steering lock device. 3. The steering lock device according to claim 1, wherein the closing member is attached to the key cylinder.