JP3183588B2 - Steering lock device - Google Patents

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 in which a lock bar moving along a guide portion of a lock body projects to the steering shaft side to lock the steering shaft.

[0002]

2. Description of the Related Art A conventional steering lock device has the following configuration. The lock body of the steering lock device is adapted to be attached to a steering column portion of an automobile, and has a cylindrical main body that houses a key cylinder that is rotated by a key, and is directed from the main body toward the steering shaft. And a cylindrical guide portion projecting therefrom.

A cam member which is rotated by the key cylinder is provided behind the key cylinder, and a lock stopper formed in the guide portion in a frame shape surrounding the cam member and urged toward the steering shaft by a spring. And a lock bar whose one end is engaged with a lock stopper.

When the key cylinder is locked, the tip of the lock bar projects toward the steering shaft to lock the steering shaft so that it cannot rotate, and the key cylinder is operated from the locked state by the key. In accordance with the state, the lock stopper and the lock bar are moved by the cam member in the direction opposite to the steering shaft side against the urging force of the spring to release the engagement of the lock bar with the steering shaft. Has become.

[0005]

By the way, in the conventional structure, when the vehicle is suddenly braked while the vehicle is running, the driver's knee strongly hits the guide portion of the lock body and receives a large impact. There is.

Therefore, in recent years, measures have been studied to reduce the impact force when the driver's knee hits the guide portion of the lock body. As one of the countermeasures, for example, when the guide section is configured to be damaged when the guide section receives an impact force exceeding a certain level, the lock stopper and the lock bar in the guide section are associated with the damage of the guide section. It is conceivable that the lock bar becomes movable and the lock bar becomes movable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to alleviate an impact force applied to a knee and to enable a lock bar to move when a guide portion of a lock body is broken. It is an object of the present invention to provide a steering lock device which can prevent the steering lock.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a cylindrical main body for accommodating a key cylinder which is rotated by a key, and further comprises a main body extending from the main body to a steering shaft. A lock body having a cylindrical guide portion protruding toward the main body, a cam member provided behind the key cylinder so as to be rotated by the key cylinder, and movable along the guide portion. And a lock stopper urged toward the steering shaft by a first urging means and moved in accordance with the rotation of the cam member. The key cylinder is provided so as to move integrally with the lock stopper, and when the key cylinder is locked, the other end is directed from the guide portion toward the steering shaft. Put out the steering shaft; and a locking bar to lock, the key cylinder is the first biasing the lock stopper and the lock bar by the cam member in response to being rotated operated from locked state to the actuated state In the steering lock device configured to move the lock bar to the steering shaft in a direction opposite to the steering shaft side against the urging force of the means to release the engagement of the lock bar with the steering shaft, An engaging member movably provided in a direction intersecting, and biasing the engaging member toward the lock bar.
A second urging means, which is provided on the guide portion so as to be releasably engageable with the engaging member, whereby the engaging member is actuated by the urging force of the second urging means. A support member for holding the lock cylinder in the disengaged position, and an engagement portion formed on the lock bar so as to correspond to the engagement member when the key cylinder is operated. The engagement member moves from the disengaged position to the lock bar side when the support member and the engagement member are disengaged based on the breakage of the guide portion in a state where the cylinder is in the operating state. The lock bar is configured to restrict the lock bar from protruding in the steering shaft direction by engaging with the engagement portion.

[0009]

When the support member is disengaged from the engaging member due to breakage of the guide portion of the lock body due to sudden braking of the vehicle, the engaging member is actuated by the urging force of the second urging means. It moves to the lock bar side from the disengaged position and engages with the engagement portion of the lock bar. This engagement restricts the lock bar from protruding in the steering shaft direction, so that even if the lock stopper and the lock bar are disengaged, the lock bar can be prevented from being movable.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. First, in FIGS. 1 and 2, a lock body 1 of a steering lock device is adapted to be attached to a steering column portion of an automobile, and has a main body 2 extending in a direction perpendicular to the plane of the drawing. It has a cylindrical guide portion 4 protruding toward the third side (downward in FIGS. 1 and 2).

A well-known key cylinder (not shown) that is rotated by a key is provided at a position corresponding to the back side of the paper in the main body 2. In the main body 2, a cam member 5 that is rotated integrally with a key rotor (not shown) of the key cylinder is disposed at a portion that intersects with the guide portion 4. An ignition switch (not shown) operated via the shaft of the cam member 5 is provided.

As is well known, the key cylinder is locked when the key rotor is located at the "LOCK" position and the key is removed from the key rotor, and the key rotor is rotated in the direction of arrow A from the "LOCK" position by the key. It is activated by being moved to the "ACC", "ON", and "START" positions.

In this case, FIG. 1 shows a state in which the key rotor is turned to the "ON" position (the key cylinder is in an operating state), and FIG. Locked (locked)
Is shown.

In the insertion hole 4a of the guide portion 4 communicating with the inside of the main body portion 2, a first frame portion 6a surrounding the cam projection 5a of the cam member 5, and the first frame portion 6a A lock stopper 6 integrally provided with a second frame portion 6b existing on the steering shaft 3 side of the portion 6a is movably disposed.

The lock stopper 6 is urged toward the steering shaft 3 (in the direction of arrow B) by a spring member 8 as first urging means disposed between the lock stopper 6 and the lid 7, and is provided with a cam. In accordance with the rotation of the member 5, it is moved in the direction of arrow B and in the direction of anti-arrow B.

A locking lever 9 extending along the key cylinder is rotatably provided in the main body 2. As is well known, the locking lever 9 is adapted to rotate in accordance with the insertion and removal of a key with respect to a key rotor of a key cylinder. When the key is inserted into the key rotor, the first frame portion 6a of the lock stopper 6 is rotated. The key rotor is turned to the “LOCK” position and the key is turned in the direction opposite to arrow C in response to the key being removed from the key rotor.

First frame 6 of lock stopper 6
An engagement groove 10 is formed on a side portion of a, and when the locking lever 9 is engaged with the engagement groove 10,
The lock stopper 6 is held at the lock release position shown in FIG.

As shown in FIG. 3, a U-shaped portion 11a at one end of the lock bar 11 is engaged with the second frame portion 6b of the lock stopper 6 from the side so as to be detachable. I have. The lock bar 11 is inserted into the insertion hole 4 a of the guide portion 4.
The other end portion 11b is in a state where the key cylinder is in a locked state (the state of FIG. 2) in a prismatic shape extending along
Protrudes toward the steering shaft 3 and engages with the steering shaft 3 to lock the rotation of the steering shaft 3.

On the outer peripheral portion of the guide portion 4, the lock stopper 6 and the lock bar 11 are moved to the unlocked position shown in FIG. 1, and the second frame portion 6b of the lock stopper 6 and the lock bar 11 are moved. A groove 12 is formed in the vicinity of an engagement portion with the U-shaped portion 11a.

In the guide portion 4, a predetermined portion on the steering shaft 3 side from the groove portion 12 extends in a direction orthogonal to the moving direction of the lock bar 11, and the insertion hole 4 of the guide portion 4 is provided.
a is formed, and a hole 13 communicating with the hole 13 is formed.
An engagement member 14 is movably inserted along the hole 13. As shown in FIG. 5, the engagement member 14
It has a stepped shape having a large-diameter portion 14a and a small-diameter portion 14b, and an engagement groove 15 is formed on the side of the small-diameter portion 14b.

A spring receiving plate 16 is attached to the outer surface of the guide portion 4 in the vicinity of the engaging member 14 by a screw 17. The spring receiving plate 16 and the large diameter portion 14a of the engaging member 14 are connected to each other. A coil spring 18 as a second urging means is provided therebetween. This coil spring 1
The urging force 8 urges the engaging member 14 toward the lock bar 11 (in the direction of arrow D).

A plate-shaped support member 19 is attached to the outer surface of the guide section 4 by screws 20 (see FIG. 4). The support member 19 is provided with the groove 12
The main body 2 is further fixed by a screw 20, and a locking portion 19 a formed at one end is locked to a projection 21 formed at the guide portion 2, thereby preventing rotation. .

The other end 19b of the support member 19
Are removably engaged with the engagement groove 15 of the engagement member 14, and the engagement holds the engagement member 14 at the disengaged position shown in FIGS. At this time, the engagement member 14
The end on the side of the large diameter portion 14a does not protrude toward the insertion hole 4a of the guide portion 4. In addition, two support protrusions 22 and 23 are provided on the outer surface side of the guide portion 4 between the screw 20 and the engagement member 14, and the support protrusions 22 and 23 support the support member. The other end 19 is received.

On the other hand, on the side surface of the lock bar 11, an engagement recess 24 as an engagement portion is formed at a position corresponding to the engagement member 14 in the state of FIG. Have been.

Next, the operation of the above configuration will be described. When the key cylinder is locked (the key rotor is "LOC
In the “K” position and the key is removed from the key rotor), the lock stopper 6 and the lock bar 11 are moved to the lock position shown in FIG. 2 by the urging force of the spring member 8, and the other end 11 b of the lock bar 11 is moved. Project to the steering shaft 3 side to lock the steering shaft 3. At this time, the engagement recess 24 of the lock bar 11
And the engaging member 14 are out of position.

When the key is inserted into the key rotor from the state shown in FIG. 2, the key rotor is turned in the direction of arrow A by the key, and turned to the "START" position, an ignition switch (not shown) is turned on to start the engine. You. Thereafter, when the turning operation force of the key is released, the key rotor is automatically turned to the “ON” position and held (see FIG. 1).

At this time, the lock stopper 6 and the lock bar 11 are moved by the spring member 8 by the cam projection 5a of the cam member 5.
Moves in the direction opposite to the arrow B against the urging force of the lock bar 11, whereby the engagement of the lock bar 11 with the steering shaft 3 is released. Then, the engagement groove 10 of the lock stopper 6
Moves to the position corresponding to the locking lever 9,
The locking lever 9 is engaged with the engagement groove 10, and the lock stopper 6 and the lock bar 11 are held at the unlocked position. In this state, the engaging recess 24 of the lock bar 11 and the engaging member 14 are in a state of facing each other.

During driving of the vehicle, for example, when the vehicle is suddenly braked and the driver's knee strongly hits the guide portion 4 of the lock body 1, the impact force causes the guide portion 4 to move to the outer peripheral portion. The groove 12 may be broken as a starting point, and the lock stopper 6 and the lock bar 11 may be disengaged accordingly. At this time, since the guide portion 4 is damaged, the impact force on the knee is reduced.

In such a case, when the lock stopper 6 and the lock bar 11 are disengaged from each other,
The lock bar 11 may move in the direction of arrow B, and the other end 11b may protrude toward the steering shaft 3.

Here, in this embodiment, the guide portion 4
Is broken starting from the groove 12, the other end 19b of the support member 19 and the engagement groove 15 of the engagement member 14 are disengaged based on the damage, and when this engagement is disengaged. As shown in FIG. 6, the engaging member 14 is a coil spring 18.
With the urging force of the lock bar 11, it moves in the direction of arrow D and engages with the engagement recess 24 of the lock bar 11.

This engagement prevents the lock bar 11 from moving with respect to the guide portion 4 and prevents the lock bar 11 from projecting toward the steering shaft 3.
Even if the lock stopper 6 is disengaged from the lock bar 11 due to the damage of the guide portion 4, the lock bar 11 can be prevented from being movable.

[0032]

As is apparent from the above description, according to the present invention, the engagement between the support member and the engagement member is based on the fact that the guide portion of the lock body is damaged due to sudden braking of the vehicle or the like. When the lock bar comes off, the engagement member engages with the engagement portion of the lock bar, and the engagement restricts the lock bar from protruding in the steering shaft direction, so that the impact force applied to the knee is reduced. In addition, when the guide portion of the lock body is broken, it is possible to prevent the lock bar from being movable.

[Brief description of the drawings]

FIG. 1 shows one embodiment of the present invention, and is a longitudinal sectional front view of a main part in a state where a steering shaft is unlocked.

FIG. 2 is a view corresponding to FIG. 1 with a steering shaft locked.

FIG. 3 is a longitudinal sectional side view taken along line XX in FIG. 1;

FIG. 4 is a side view of a main part.

FIG. 5 is a perspective view of an engagement member.

FIG. 6 is a longitudinal sectional side view of a main part in a state where a guide part is broken.

[Explanation of symbols]

1 is a lock body, 2 is a main body, 3 is a steering shaft, 4 is a guide, 5 is a cam member, 6 is a lock stopper, 8 is a spring member ( first biasing means), 11 is a lock bar, and 11a is U-shaped part (one end), 11b is the other end,
12 is a groove, 14 is an engagement member, 15 is an engagement groove, 18 is a coil spring ( second biasing means), 19 is a support member, and 24 is an engagement recess (engagement portion).

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shozo Kito No. 1 Noda, Toyoda Rika Electric Machinery Co., Ltd., Oguchi-machi, Niwa-gun, Aichi Prefecture (72) Inventor Hisaka Naito No. 3 Shinchi Fuchu-cho, Aki-gun, Hiroshima Prefecture No. 1 Mazda Co., Ltd. (72) Inventor Katsumi Takeda 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Co., Ltd. (56) References Japanese Utility Model No. 5-13867 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) B60R 25/02 E05B 65/12

Claims (1)

(57) [Claims] A lock body having a cylindrical main body for accommodating a key cylinder rotated by a key and having a cylindrical guide protruding from the main body toward a steering shaft. A cam member provided behind the key cylinder so as to be rotated by the key cylinder; a cam member provided movably along the guide portion, and biased toward the steering shaft by first biasing means. A lock stopper that is moved in accordance with the rotation of the cam member and one end of which is provided to engage with the lock stopper and move integrally with the lock stopper in the guide portion; A lock bar that locks the steering shaft by projecting the other end from the guide portion toward the steering shaft when the vehicle is locked. The cam member causes the lock stopper and the lock bar to be steered against the urging force of the first urging means in response to the turning operation of the key cylinder from the locked state to the operating state. A steering lock device configured to move in a direction opposite to a shaft side to release engagement of a lock bar with a steering shaft, wherein the guide portion is provided to be movable in a direction intersecting a movement direction of the lock bar. An engaging member, a second urging means for urging the engaging member toward the lock bar, a second urging means provided on the guide portion so as to be detachably engageable with the engaging member. The engagement member is moved to the second position by engagement .
A support member that holds the key cylinder at the disengaged position against the urging force of the urging means; and a lock member formed on the lock bar so as to correspond to the engagement member when the key cylinder is operated. A mating portion, wherein when the guide member is broken in a state where the key cylinder is operated, the engagement between the support member and the engagement member is released. A steering lock device, wherein the lock bar is configured to move from a release position to a lock bar side and engage with the engagement portion, thereby restricting the lock bar from protruding in a steering shaft direction.