JPS6177547A - Safety device for steering lock - Google Patents

Abstract

PURPOSE:To facilitate the operation of steering lock and prevent the steering lock from accidental locking by permitting a lug for blocking the pivoting of a stopper ring to engage a stopper for blocking the stopper ring from pivoting to the locking position in returning and pivoting a key and to be disengaged from the stopper by a releasing member. CONSTITUTION:When a key is turned to return pivotably a cylinder inner 4 toward the locking position, an end of a recess 4a of said inner 4 engages a lug 11b of a stopper ring 11 so that a stopper ring 11 is pivoted together with the inner 4. On the way a lug 11c for blocking the pivoting of the stopper ring 11 engages a stopper 3a of a cylinder outer 3 to stop the further pivotal return of the inner 4 (see the drawing). When the operating portion 12b of the releasing member 12 is depressed under such a condition, the stopper ring 11 is moved axially of a cylinder lock by a inclined portion of an end of said member 12 to disengage said lug 11c from the stopper 3a. Thus, the inner 4 can be pivoted to the locking position.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is an ignition switch device for an automobile, which disables rotation during the return rotation of a cylinder lock to the lock position and allows another operation. The present invention relates to a safety device for a steering lock device that can be rotated by adding a lock.

<Prior Art> In order to prevent the steering shaft from being accidentally locked during driving, a safety device that prevents the key from turning even if the key is simply turned in the locking direction is well known. An example of its structure is introduced in No. 34305.

What is described in the above publication is that a stopper is provided on the rotor or the locking/unlocking rotating member to rotate together with the rotor, and the locking portion is moved to the stopper at an angle before the two-rotor is advanced from the off position to the lock position. A manual member biased so as to protrude into the rotation range of the steering shaft is provided, and the locking operation of the steering shaft is performed by two actions: movement against the bias of the manual member and rotation of the rotor etc. to the locked position using a key. This prevents accidental locking by requiring both to be done at the same time.

<Problems to be solved by the invention> In the above-mentioned conventional technology, one-handed operation is difficult and requires both hands, and two actions must be performed simultaneously, so if the timing is not right, the return operation will fail. Although this is a good thing for safety, there is another problem in that the operation is unnecessarily cumbersome and impractical, and the overall structure is complex and has a large number of parts. There was also the problem of becoming.

The present invention solves these problems and provides a safe steering lock device that can reliably prevent accidental locking due to its simple structure, and can perform two actions in sequence, making it easy to operate and can be operated with one hand. This was done for the purpose of providing equipment.

<Means for Solving the Problems> In order to achieve the above object, the present invention is arranged on the outer periphery of the cylinder inner of a cylinder lock, is supported movably in the axial direction, and is arranged so as to be movable in the axial direction. and when returning from the on position to the lock position, engages with a stopper formed on a fixed member such as the cylinder outer at the intermediate return rotation limit position 1, and rotates back. A stopper ring has a rotation prevention protrusion that makes it impossible to move, and an operation part protrudes to the outside of the cylinder lock, and by moving in the radial direction of the cylinder lock, a first sliding movement formed on the stopper ring is formed. A release member having an inclined pushing part that engages with the engagement part to push the stopper ring in the axial direction and release the engagement between the rotation prevention protrusion and the stopper, and a fixed member such as a cylinder outer. a sloped portion that engages with a second sliding engagement portion of the stopper ring that is formed to move in the axial direction when the release member is operated, and rotates the stopper ring toward the lock position. It is characterized by

<Operation> Since the device of the present invention is configured as described above, when the key is rotated back, the rotation preventing protrusion of the stopper ring engages with the stopper of the fixing member, and the key is rotated continuously to the lock position. The key is prevented from moving, and by pushing or pulling the release member, the key can be rotated again and rotated to the locked position.

The steering shaft can be locked by removing the key.

<Example> Next, the present invention will be specifically explained with reference to an illustrated embodiment.

First, the outline of the steering lock device will be explained with reference to FIG.

In the figure, (1) is a body having a rotary switch part (2), (3) is a cylinder outer fixed within the body (1), and (4) is rotatably supported within the cylinder outer (3). The cylinder inner (3) and the cylinder inner (4) constitute a well-known cylinder lock. (5) is a cam connected to the cylinder inner (4), and the cam (5) is a key (not shown).
is inserted into the cylinder inner (4) and rotated, thereby rotating the rotor (not shown) in the rotary switch section (2), thereby performing a predetermined opening/closing operation. (6) is a mounting part provided in a direction perpendicular to the axis of the cylinder lock in order to attach the body (1) to the steering column, and (7) is a mounting part provided on the body (1) so as to be movable in the axial direction. The locking member (7) is a supported locking member whose base end engages with the cam (5) and is constantly biased in the axial direction (downward in the figure) by a spring (8).

Movement is regulated by a lock link (not shown) that operates in conjunction with the insertion and removal and rotation of the key, and only when the key is removed from the locked position, its tip protrudes into the steering column and the steering shaft is locked. It consists of five. (9) is a cap fixed to the key insertion slot. In addition.

Since these structures and operations are well known, detailed explanations will be omitted.

Next, the configuration and operation of a safety device according to the present invention will be described in detail.

(11) is a stopper ring, (12) is a release member, and the stopper ring (11) is a cylinder inner (4).
The cylindrical guide portion (lla) is fitted into the outer peripheral portion of the key so as to be movable in the axial direction, and is biased toward the key insertion slot by a coil spring (13). The release member (12) is supported by the body (1) or the cylinder outer (3) so as to be able to swing around a fulcrum (14), and has a locking portion (12a) formed at its tip. An operating section (12b) is formed on the opposite side of the engaging section (12a), and the operating section (12b) is connected to the body (1) by a spring (15).
) protrudes outside.

A convex part (llb) is formed on the inner periphery of the stopper ring (11), which is combined with a recessed part (4a) formed over a certain range on the outer periphery of the cylinder inner (4), and It is held so that it can rotate within a certain range, and is prevented from being removed.

In addition, the stopper ring (11) is attached to the cylinder inner (4).
Although not specifically shown in the drawings in this embodiment, the angle that can be rotated within a certain range is preferably set to be larger than 45° and smaller than 90'', and therefore is set to 60°. Further, a rotation preventing protrusion (lie) is provided on the outer periphery of the stopper ring (11).

Correspondingly, a stopper (3a) is provided protruding from the inner surface of the cylinder outer (3). The outer peripheral edge of the rotation prevention protrusion (llc) serves as a first sliding engagement part (lid), and the locking part (12a) of the release member (12) is connected to this sliding engagement part (lid). lid), and the base of the locking portion (12a) has an inclined pushing portion (12a) inclined toward the back of the cylinder lock.
c) are formed continuously. Furthermore, a second sliding engagement portion (lie) is provided on the outer periphery of the stopper ring (11) and protrudes in the axial direction, and correspondingly, a locking portion is provided on the inner surface of the cylinder outer (3). An inclined portion (3b) is formed which is inclined in the position direction.

The present embodiment has the above-mentioned configuration, and the operation will be explained next with reference to the drawings from FIG. 2 onwards. FIG. 2 shows the state in which the key, that is, the cylinder inner (4), has been returned from the on position toward the lock position and turned to the rotation blocking position.

The locked position is the position where the key can be inserted and removed from the cylinder lock and the steering shaft can be locked, and the off position (also called the ACC position) is where the ignition circuit is off and the circuits of accessory devices such as the radio are on. The on position is the position where the ignition circuit is turned on, and the starter position is the position where the starter motor circuit is turned on.

As is well known, these positions are arranged clockwise in the above order from the lock position, and the intervals therebetween are set at approximately 60°, although not specifically shown.

Also, the return rotation +1: position is rotated once while returning the cylinder lock to the lock position! This is a position that prevents accidental locking by disabling IJ, and is provided, for example, at or near the off position.

Therefore, the lock position is the cylinder inner (・
1) and stopper ring (11) about 45° counterclockwise.
The rotation preventing protrusion (IIC) of the stopper ring (11) is in the rotated position, and the stopper (IIC) of the cylinder outer (3)
It is located at the back of 3a).

Now, when inserting the key into the cylinder inner (4) and rotating it to the starter position, the convex part (llb) will turn into the concave part (・la).
Only the cylinder inner (4) rotates until it engages with the counterclockwise end of the cylinder 2, that is, a position halfway between the OFF position and the ON position, and thereafter the stopper ring (11) also rotates at the same time. Then, at a position intermediate between the on position and the starter position, the stopper (3a) of the cylinder outer (3) and the rotation prevention position portion (llc) of the stopper ring (11) come out of overlap, and the stopper ring (11) is moved by the coil spring. (13
) moves toward the key insertion slot. After the starter motor is driven and the engine is started, when the key is returned to the on position, only the cylinder inner (4) returns to the on position, as there is more room in the recess (4a) than the convex part (llb). The stopper ring (11) will stop at that position.
It remains as it is.

Next, in order to stop the engine and remove the key, turn the key to return the cylinder inner (4) to the lock position.
lb) engages with the clockwise end of the recess (4a), the stopper ring (11) rotates together with the cylinder inner (4) in the direction of the lock position, and the rotation prevention protrusion (llc) rotates in the direction of the lock position.
engages with the stopper (3a), resulting in the off position shown in FIG. 2 and no further return rotation is possible.

In this state, when the operating part (12b) of the release member (12) is pushed in against the spring (15), the inclined pushing part (12c) is pressed against the first sliding engagement part (lid) of the stopper ring (11). )
As shown in Fig. 3, the stopper ring (11) is pushed by the slope and moves in the axial direction toward the back of the cylinder lock, and the tip of the second sliding engagement part (lte) Inclined part (3b
). Rotation limit IJ: The mutual positions of the protrusion (lie) and the stopper (3a) are selected so that their axial positions shift at this point and the engagement between them is released, and further operation is required. When the part (12b) is pressed, the sliding engagement part (lle
) moves in the axial direction as shown by the broken line in FIG. 5, and then slides on the inclined portion (3b), and the rotational force is applied to rotate the stopper ring (11) toward the lock position. That is, the first rotation preventing protrusion (llc) moves to a position bypassing the stopper (3a) as shown by the arrow in FIG. ) Even if you take your hand off the stopper ring (11)
remains in that position.

Therefore, the cylinder inner (4) is connected to the stopper ring (11).
), the steering shaft can be rotated toward the lock position, returned to the lock position, removed the key, and locked the steering shaft.

Return to the lock position! 1111 requires two operations: rotating the key and pressing the release member.

It is impossible to turn the key back unless you consciously perform this series of operations, and the risk of accidental locking due to someone turning the key at random while driving is definitely prevented. Furthermore, since these two operations can be performed in sequence, there is no need to time them properly or to use both hands, and the rotation can be returned to the locked position very easily.

Further, in this embodiment, the convex portion (l) of the stopper ring (11)
The recess (4a) of the cylinder inner (4) has plenty of room for the cylinder inch (4), and the stopper ring (11) rotates with a delay relative to the cylinder inch (4). Even if (4) is turned from the lock position to the off position, the rotation prevention function is not exhibited, and it can be returned to the lock position without operating the release member (12).

In addition, in the above embodiment, a structure in which the operation part is pushed is used as a release member, but a structure in which the operation part is pulled directly or through a wire, etc., is used. It can also be used.

<Effects of the Invention> As is clear from the above description of the embodiments, according to the present invention, the push/pull operation of the release member is not performed at the return-first rotation blocking position during the return rotation of the cylinder inner toward the lock position. By doing this, it is possible to easily return to the locked position and rotate while reliably preventing accidental locking. In addition, the two operations, turning the key and operating the release member, do not need to be timed as long as they are performed in order, and one operation of the release member moves and rotates the stopper ring in the axial direction. is easy and can be operated with one hand,
The structure is simple, the number of parts can be reduced, and a highly practical steering lock iF safety device can be obtained at a low cost.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of the steering lock device of the embodiment, Fig. 2 is a front view of the main parts, and Fig. 3 (=i) and (b) are the release of Fig. 2 viewed in the six directions of the arrows. A side sectional view of the member before and after operation, FIG. 4 is a side sectional view of FIG. 2 taken in the direction of arrow B, and FIG. 5 is a side sectional view of the main part of FIG. 2 taken in the direction of arrow C. It is. . (3)... Cylinder outer, (3a)... Stopper, (3b)... Inclined portion, (4)... Cylinder inner, (7)... Locking member, (11)... Stopper ring, (lie)...rotation prevention protrusion, (lid
)...First sliding engagement part, (lie)...Second sliding engagement part, (12)...Release member, (12b)...
Operation part, (12c)... inclined pushing part.

Claims (1)

[Claims] (1) Arranged on the outer periphery of the cylinder inner of the cylinder lock, supported so as to be movable in the axial direction, rotates in accordance with the rotation of the cylinder inner, and returns from the on position to the lock position. A stopper ring having a rotation preventing protrusion that sometimes engages with a stopper formed on a fixed member such as a cylinder outer at an intermediate return rotation prevention position to disable return rotation, and a stopper ring that protrudes to the outside of the cylinder lock. By moving the cylinder lock in the radial direction, the cylinder lock engages with a first sliding engagement part formed on the stopper ring and pushes the stopper ring in the axial direction, thereby preventing the rotation. a release member having an inclined pushing part that releases the engagement between the protrusion and the stopper; and a second stopper ring that is formed on a fixed member such as a cylinder outer and that moves in the axial direction when the release member is operated. A safety device for a steering lock device, comprising: an inclined portion that engages with the sliding engagement portion of the holder to rotate the stopper ring toward the lock position.