JPH0427720Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a cylinder lock for a steering lock device that eliminates failure to return from a starting position.

<Prior art and its problems> The cylinder lock of the steering lock device has a cylinder outer on the outer periphery of the cylinder inner which has a plurality of lock plates inside, which detects the protrusion state of the lock plate in the outer circumferential direction when the key is inserted. They are provided coaxially and are configured so that when a proper key is inserted, the cylinder inner can rotate.

However, since the conventional cylinder outer structure is fixed, if the key is inserted incompletely or the spare key (imitation key) has poor machining accuracy, the lock plate may be slightly smaller than the outer peripheral surface of the cylinder inner. However, as the key protrudes and the frictional force with the inner circumferential surface of the cylinder outer increases, it is possible to rotate the key from the lock position toward the start position manually, but the return of the key from the start position is due to the spring. Because of the automatic return, the cylinder inner could not rotate smoothly relative to the cylinder outer, resulting in poor return and sometimes causing problems such as the starter motor continuing to rotate.

This invention was developed in view of these problems, with the purpose of providing a cylinder lock for a steering lock device that does not cause a return failure.

<Means for solving the problem> In order to achieve the above-mentioned purpose, in this invention,
The lock plate is fixed to the body at least in the lock position where the key is inserted or removed, and at least in the rotation position of the key, on the outer periphery of the cylinder inner housing the lock plate that protrudes in the outer circumferential direction when the key is inserted or removed. A movable cylinder outer is provided which rotates together with the cylinder inner in response to rotation of the key when the key is between the on position and the start position.

<Operation> Since the cylinder lock of this invention is constructed as described above, the insertion and removal of the key in the lock position and the detection of the suitability of the key are performed in exactly the same manner as in the case of a conventional fixed cylinder outer. Since the cylinder outer rotates together with the cylinder inner between the on position and the start position, a return failure that would otherwise occur due to the cylinder inner rotating incorrectly with respect to the cylinder outer does not occur.

<Example> Next, one embodiment shown in the drawings will be described.

In the figure, 1 is a cylinder inner having a lock hole, 2 is a movable cylinder outer provided on the outer periphery of the cylinder inner 1, 3 is a holding cylinder that holds the cylinder outer 2, and 4 is a holding cylinder 3.
is a fixed body. A plurality of lock plates 5 are provided in the lock hole of the cylinder inner 1 in the transverse direction along its longitudinal direction, and the lock plates 5 protrude from the outer periphery of the cylinder inner 1 according to the shape of the key. Cylinder inner 1
and the cylinder outer 2 constitute a cylinder lock. Reference numeral 6 denotes a cam connected to the cylinder inner 1. When a key is inserted into the cylinder inner 1 and rotated, the cam 6 rotates together with the rotary switch section 7 provided at the other end of the body 4. Predetermined opening/closing operations are performed by rotating the rotor inside.

Reference numeral 8 denotes a mounting frame portion for mounting the body 4 to the steering column, 9 a set cover provided correspondingly thereto, 10 a set bolt for fixing, and 11 a mounting frame portion 8 which is attached by the biasing force of a spring 12.
The lockshaft 11 is supported by the body 4 so as to protrude inward, and the lockshaft 11 is pushed by a spring 12 to a position where the slide plate 11a abuts the cam 6 at the lock position, and then protrudes into the mounting frame 8 and is attached to the steering shaft. is configured to be locked.

On the other hand, a holding groove 13 is provided in one side of the cylinder outer 2 along the axial direction of the cylinder lock, and a locking lever 14 is housed in the holding groove 13, which is swingable by a support shaft 16 movable within the groove 15. I support it. The locking lever 14 has a key sensing end 14a at one end that comes into contact with a key sensing member (not shown) of the cylinder inner 1, and a locking end 14b at the other end that can come into contact with the lock shaft 11. When the key is inserted into the lock shaft 1, the key sensing end 14a is pushed up against the spring 17, and as the key rotates, the cam 6 pushes the slide plate 11a, and the lock shaft 11 is pulled into the body 4. The locking end 14b engages with the locking groove 11b of the lockshaft 11, and the steering shaft is unlocked and held in the unlocked state.

Reference numeral 21 denotes a locking pin provided radially within the protrusion 2a at the end of the cylinder outer 2, and the locking pin 21 is urged in the axial direction by a spring 22. Corresponding to this locking pin 21, an engagement groove 23 is formed on the outer periphery of the cylinder inner 1, which becomes gradually shallower from the lock position toward the start position.
It is formed within a 90° range. The figure shows the state in the locked position, in which the locking pin 21 protrudes outward and its tip is inserted into the hole 3a of the holding cylinder 3, preventing the cylinder outer 2 from rotating. There is. The holding cylinder 3 is provided with a fan-shaped protrusion 3b into which the protrusion 2a of the cylinder outer 2 fits, and a return spring 24 is compressed into the fan-shaped protrusion 3b to bias the cylinder outer 2 in a counterclockwise direction. The locking pin 21 is inserted into the hole 3 of the holding cylinder 3.
When it is removed from a, the cylinder outer 2 can rotate within a certain range against the return spring 24.

When the key 30 is inserted into the cylinder inner 1 and turned in the on direction (clockwise in FIG. 1), the cylinder inner 1 turns and the depth of the engagement groove 23 into which the locking pin 21 fits becomes deeper and the locking pin 21 moves in the axial direction, and eventually the locking pin 21 comes out of the hole 3a and the key 30 engages with the locking pin 21. This position is the on position, and when the key 30 is further rotated from this state, the protrusion 2
The cylinder outer 2 rotates together with the cylinder inner 1 until the cylinder a reaches the rightmost end allowed by the fan-shaped projection 3b, that is, the start position.

Further, since the cylinder outer 2 is urged in the return direction by the repulsive force of the return spring 24, the cylinder inner 1 is pushed in the return direction via the key 30, and when the key operation is stopped, the cylinder outer 2 and cylinder inner 1 rotate together and automatically return from the start position to the on position. At this time, since the cylinder outer 2 itself rotates together, the cylinder inner 1 can return smoothly without causing a return failure.

When the key is further rotated toward the lock position, the groove 23 becomes shallower and the locking pin 21 is again inserted into the hole 3a of the holding cylinder 3, so that the cylinder outer 2 is fixed in the state shown in FIG. The cylinder outer 2 does not rotate from the on position to the lock position, but since it is operated manually in this range, even if the friction between the cylinder inner 1 and cylinder outer 2 increases due to a defective shape of the imitation key, etc. The key can be rotated without any problems, and there are no practical problems.

Note that the locking pin 21 has the function of holding the cylinder outer 2 in the on position and the function of rotating the cylinder outer 2 from the on position to the start position by engaging with the key, which places a large burden on the locking pin 21. is added. For this reason, as shown in FIG. 1, a moderation ball 25 is provided which is biased by a spring 26, for example, and engages with the recess 2b of the cylinder outer 2 in the on position to reinforce the holding force. Good too. For example, appropriate protrusions and recesses are formed on the edge portions of the cylinder inner 1 and the cylinder outer 2 on the key insertion side, respectively, and these are engaged between the on position and the start position to transfer and receive rotational force. By adopting such a structure, the load on the locking pin 21 during rotation may be reduced.

Further, in the embodiment, the fan-shaped protrusion 3 of the holding cylinder 3
A return spring 24 is provided in the cylinder outer 2.
Although the return spring is biased counterclockwise, the return spring may be located at any other suitable location.

<Effects of the invention> As is clear from the above-mentioned embodiments, this invention is fixed to the body at least at the lock position where the key is inserted and removed, and moreover,
A movable cylinder outer is provided which rotates together with the cylinder inner in accordance with the rotation of the key at least when the key is between the on position and the start position.

Therefore, from the on position to the start position, the cylinder outer rotates together with the cylinder inner, so even if the key is inserted incompletely or the spare key has poor machining accuracy, the cylinder inner will rotate with the cylinder outer. There will be no return failure due to the inability to rotate smoothly against the
For example, troubles such as the starter motor continuing to rotate can be reliably prevented.

[Brief explanation of the drawing]

The drawing shows an example of this invention.
FIG. 1 is a sectional view of the main part, FIG. 2 is a partially cutaway front view, and FIG. 3 is a partially cutaway bottom view. 1...Cylinder inner, 2...Cylinder outer, 2a...Protrusion, 3...Holding cylinder, 4...
Body, 5...Lock plate, 6...Cam, 1
1... Lockshaft, 21... Locking pin, 23
...Engagement groove, 30...key.

Claims (1)

[Scope of Claim for Utility Model Registration] A cylinder inner housing a lock plate that protrudes in the outer circumferential direction in response to insertion and removal of a key, and having an engagement groove in the rotational direction on a part of the outer circumference; A movable cylinder outer is provided with a protrusion that protrudes outward and can be rotated within a predetermined range, and a movable cylinder outer that is provided within the protrusion of the cylinder outer and that can be rotated according to the position of the cylinder inner. a locking member inserted into the mating groove or protruding from the protrusion, and the locking member protrudes from the protrusion at least in the lock position where the key is inserted or removed in response to a rotational operation of the key. to lock the cylinder outer to the body, and to make the cylinder inner rotatable relative to the cylinder outer, and at least when the key is between the on position and the start position,
The locking member is inserted into the engagement groove of the cylinder inner to release the lock between the cylinder outer and the body, and the locking member locks to the cylinder inner so that the cylinder outer rotates together with the cylinder inner. A cylinder lock for a steering lock device, characterized in that it is configured as follows.