JPH0338040Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is an ignition switch device for an automobile, in which the cylinder lock is prevented from rotating during the return rotation to the lock position, and another operation is performed. 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.

The device described in the above-mentioned publication has a stopper that rotates the rotor or the locking/unlocking rotating member, and also locks the locking portion with the stopper at an angle before the rotor advances 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 lock position using a key. This prevents accidental locking by requiring both to be performed at the same time.

<Problems to be solved by the invention> In the above-mentioned conventional technology, when the rotor etc. is rotated from the lock position to the off position, the locking portion of the manual member passes over the stopper.
Even when the rotor is rotated not for the purpose of driving a car, but simply for listening to the radio, etc., the return rotation is blocked, and there is a problem that two movements must be performed at the same time. Since the stop part is integrally provided, when rotating the rotor, the stop part of the manual member can overcome the stopper,
At this time, there was also the problem that the external control panel moved, making it unsightly.

The present invention solves these problems and provides a safety device for the steering lock device that has a simple structure that reliably prevents accidental locking, and that prevents return rotation only when the engine is operated. It was made for the purpose of providing.

<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. The cylinder is connected to the cylinder inner through a combination of concave and convex portions so as to rotate together with a certain amount of play in response to A stopper ring has a rotation preventing protrusion that engages with a stopper formed on a fixed member such as an outer to prevent return rotation, and an operating part that protrudes to the outside of the cylinder lock. an inclined pushing part that engages with a sliding engagement part formed on the stopper ring to push the stopper ring in the axial direction and release the engagement between the rotation prevention protrusion and the stopper; A release member having the following features.

<Function> As configured as above, in the device of the present invention, when the key is rotated back, the rotation preventing protrusion of the stopper ring engages with the stopper of the fixing member, preventing continuous rotation to the lock position. is blocked, and by pushing or pulling the release member, the key can be rotated again and rotated to the lock position,
The steering shaft can be locked by removing the key.

<Example> Next, the present invention will be specifically explained using an example shown in the drawings.

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 in the body 1, 4 is a cylinder inner rotatably supported in the cylinder outer 3, and the cylinder outer 3 and the cylinder The inner 4 constitutes 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 portion provided in a direction perpendicular to the axis of the cylinder lock for mounting the body 1 to the steering column; 7 is a locking member supported by the body 1 so as to be movable in the axial direction; The locking member 7 has a cam 5 at its base end.
It engages with the key and is constantly biased in the axial direction (downward in the figure) by a spring 8, and its movement is regulated by a lock link (not shown) that operates in conjunction with the insertion and removal and rotation of the key. Only when the key is removed from the key position, its tip protrudes into the steering column and the steering shaft is locked. 9 is a cap fixed to the key insertion slot. Note that these structures and operations are well known, so detailed explanations will be omitted.

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

11 is a stopper ring; 12 is a release member; the stopper ring 11 has its cylindrical guide portion 11a fitted into the outer circumference of the cylinder inner 4 so as to be movable in the axial direction; biased in the direction. Release member 12
The body 1 is pivotable about the fulcrum 14.
Alternatively, it is supported by the cylinder outer 3, and a locking portion 12a is formed at the tip, and an operating portion 12b is formed on the opposite side of the locking portion 12a.
A spring 15 causes the operating portion 12b to protrude outside the body 1.

A convex portion 11b is formed on the inner circumference of the stopper ring 11, which is combined with a concave portion 4a formed over a certain range on the outer circumference of the cylinder inner 4, so that it can rotate within a certain range with respect to the cylinder inner 4. It is held and prevented from falling out.
Although the angle at which the stopper ring 11 can rotate within a certain range with respect to the cylinder inner 4 is not specifically shown in this embodiment, it is preferably set to be greater than 45 degrees and smaller than 90 degrees. About
It is set at 60°. Also, stopper ring 11
A rotation prevention protrusion 11c is provided on the outer periphery of the cylinder outer 3, and a stopper 3a is provided on the inner surface of the cylinder outer 3 in correspondence with the rotation prevention protrusion 11c. Rotation prevention protrusion 11
The outer peripheral edge of c is a sliding engagement part 11d, and the locking part 12a of the release member 12 is engaged with this sliding engagement part 11d, and the base of the locking part 12a has a cylinder. Inclined pushing part 12 inclined toward the back of the lock
c are formed continuously.

This embodiment has the above-mentioned configuration, and then the second
The operation will be explained with reference to the drawings below. 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 lock 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 the position 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 from the lock position in the above order. Although the interval is not specifically shown, it is set to about 45°. The return rotation prevention position is a position that prevents accidental locking by temporarily disabling rotation of the cylinder lock while returning it to the lock position, and is provided, for example, at or near the off position.

Therefore, the lock position is approximately when the cylinder inner 4 and stopper ring 11 are moved counterclockwise with respect to FIG.
It is in a position rotated by 45 degrees, and the rotation preventing protrusion 11c of the stopper ring 11 is located behind the stopper 3a of the cylinder outer 3.

Now, when the key is inserted into the cylinder inner 4 and rotated to the starter position, the convex part 11b will move to the concave part 4a.
Only the cylinder inner 4 rotates until it engages with the counterclockwise end of the cylinder, that is, to a position intermediate 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 protrusion 1 of the stopper ring 11 are connected to each other.
1c is released, and the stopper ring 11 is moved toward the key insertion slot by the biasing force of the coil spring 13. After the starting motor is driven and the engine is started, when the key is returned to the on position, the cylinder inner 4
The chisel rotates to the on position, and the stopper ring 11
remains stopped at that position.

Next, to stop the engine and remove the key,
When the key is turned to return the cylinder inner 4 to the lock position, the protrusion 11b engages with the clockwise end of the recess 4a at a position midway between the on and off positions, and the stop ring 11 is moved to the lock position. The rotation preventing protrusion 11c engages with the stopper 3a in the direction along with the cylinder inner 4, and the rotation preventing protrusion 11c engages with the stopper 3a, resulting in the off position shown in FIG. 2, and no further return rotation is possible.

When the operating part 12b of the release member 12 is pushed in against the spring 15 in this state, the inclined pushing part 12c engages with the sliding engagement part 11d 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. As shown by the broken line in FIG. 4, the rotation preventing protrusion 11c and the stopper 3a are disengaged from each other due to the movement of the stopper ring 11 in the axial direction, and the engagement between the two is released. It is provided at a position where the rotation blocking effect is eliminated. Therefore, from this state, the cylinder inner 4 can be rotated together with the stopper ring 11 toward the lock position, and the cylinder inner 4 can be returned to the lock position, the key can be removed, and the steering shaft can be locked.

The return rotation to the lock position described above requires two operations: rotation of the key and pushing of the release member.
It is impossible to turn the key back unless you consciously perform this series of operations, and the risk of accidentally turning the key to the lock position while driving is reliably prevented.

Furthermore, in this embodiment, the concave portion 4a of the cylinder inner 4 has a margin with respect to the convex portion 11b of the stopper ring 11, and the stopper ring 11 rotates with a delay with respect to the cylinder inner 4. Even if the inner 4 is turned from the lock position to the off position, the rotation prevention function is not exhibited, and the inner 4 can be returned to the lock position without operating the release member 12.

In addition, in the above embodiment, a structure in which the operating section is pushed is used as the release member, but a structure in which the operating section is pulled directly or via a wire, etc., or one having another structure, may be used. It can also be used.

<Effects of the Invention> As is clear from the description of the above-mentioned embodiments, according to the present invention, the pushing and pulling operation of the release member is performed at the return rotation blocking position during the return rotation of the cylinder inner toward the lock position. By doing so, it is possible to easily return to the locked position and rotate while reliably preventing accidental locking. In addition, the rotation prevention function is released by moving the stopper ring in the axial direction by operating the release member, so the operation is easy.The release member does not move when the cylinder inner rotates, so it does not look unsightly and has a simple structure. With this, the number of parts can be reduced, and a highly practical safety device for the steering lock device can be obtained at low cost.

Furthermore, according to the present invention, the stopper ring rotates with a certain amount of play and a delay with respect to the cylinder inner, so when the cylinder inner is turned from the lock position to the off position for the purpose of simply listening to the radio, The return rotation prevention function is not demonstrated,
Another advantage is that it can be returned to the locked position without operating the release member.

[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 Figs. 3 a and b are before operation of the release member when Fig. 2 is viewed in the direction of arrow A. FIG. 4 is a side sectional view of FIG. 2 viewed in the direction of arrow B. 3...Cylinder outer, 3a...Stopper, 4
...Cylinder inner, 7...Locking member, 1
1...Stopper ring, 11c...Rotation prevention protrusion, 11d...Sliding engagement part, 12...Release member,
12b...Operation unit, 12c...Inclination pushing unit.

Claims (1)

[Claims for Utility Model Registration] It is disposed on the outer periphery of the cylinder inner of the cylinder lock, is supported so as to be movable in the axial direction, and rotates with a certain amount of play in response to the rotation of the cylinder inner. It is connected to the cylinder inner through a combination of concave and convex portions, and engages with a stopper formed on a fixed member such as the cylinder outer at an intermediate return rotation blocking position when returning from the on position to the lock position. The stopper ring has a rotation preventing protrusion that prevents the cylinder lock from being rotated, and the operating part protrudes from the outside of the cylinder lock. A steering wheel characterized by comprising: 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. Lock device safety device.