JPH0712577Y2 - Steering lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention prevents the rotation of the cylinder lock in the middle of the return rotation of the cylinder inner to the lock position, and the return rotation by the pushing operation of the cylinder inner. The present invention relates to an improvement of a steering lock device provided with a safety mechanism that enables the above.

(Prior Art) A steering lock device is configured such that when a key is removed, a lock shaft protrudes and engages with a groove of a steering shaft to lock the steering shaft.
In order to prevent the locked state when the key is removed by an incorrect operation, the rotation of the cylinder lock is blocked during the return rotation of the cylinder inner to the locked position, and the return rotation is performed by pushing the cylinder inner. There is a so-called two-motion type safety mechanism that enables the above.

(Problems to be solved by the invention) However, in a steering lock device having such a safety mechanism, a play that allows the cylinder inner to be pushed is inevitably provided between the cam member and the cylinder inner. ing. Therefore, the cam member may move toward the cylinder inner side due to vibration or impact and may disengage from the lock shaft, causing the lock shaft to pop out unnecessarily.Therefore, a separate stopper member is provided to prevent the cam member from moving toward the cylinder inner side. Is built in.

Therefore, there are problems that the number of parts increases, the assembly structure becomes complicated, and the manufacturing cost tends to increase.

The present invention has been made in view of the above problems, and an object thereof is to provide a steering lock device having a small number of parts and a simple assembly structure.

(Means for Solving the Problems) In order to solve the above problems, according to the present invention, a cylinder inner that is movably held at least in the return rotation preventing position and is biased in the key withdrawing direction. And a unidirectional locking portion that moves integrally with the cylinder inner and that has an inclined surface on the ON position direction side and that has a surface along the axial direction parallel to the pushing direction on the rotation blocking position direction side. , Movably held in the axial direction,
A stopper member that is disengaged from the one-way locking portion when the cylinder inner moves in the pushing direction,
A lock shaft protruding from the opening hole to lock the steering shaft in a non-rotatable manner, a lock shaft spring biasing the lock shaft in a direction to protrude from the opening hole, and a lock shaft formed in a direction opposite to the opening hole. While covering an opening for incorporating a shaft and the lock shaft spring, a lid that holds the lock shaft spring, and engages with the lock shaft,
A cam member for retracting the lock shaft into the opening hole in response to the rotation of the cylinder inner; and a blocking portion integrally formed with the lid for blocking movement of the cam member toward the cylinder inner side. ing.

(Operation) Since the cam member is configured as described above, the cam member is blocked by the blocking portion of the lid without providing a separate stopper member, does not move to the cylinder inner side, and disengages from the lock shaft. Never.

(Embodiment) Next, an embodiment of the present invention will be described in detail with reference to the drawings.

Reference numeral 1 is a body of the steering lock device, 2 is a cylinder inner, 3 is a cylinder outer, and the cylinder inner 2 and the cylinder outer 3 constitute a well-known cylinder lock. Reference numeral 4 denotes a cam member, 5 denotes a lock shaft that is operated by engaging with the cam member 4, 6 denotes a lock shaft spring, and 7
The lid 7 is formed with an engaging projection 7a as a blocking member that engages with the cam member 4 and blocks the movement of the cam member 4 toward the cylinder inner 2 side. Reference numeral 8 is an ignition switch, and 9 is a mounting portion of a steering shaft to a housing (not shown). The cam member 4 has a fitting recess 4a formed therein, and the fitting recess 4a has a cylinder inner 2
The fitting convex portion 2a of is fitted. By inserting the key 10 into the cylinder inner 2 and rotating the cam member 4, the cam member 4 rotates together with the key 10 to retract the lock shaft 5 into the body 1 against the urging force of the lock shaft spring 6. , A rotor (not shown) of the ignition switch 8 is rotated to perform a predetermined opening / closing operation. A play is provided between the fitting concave portion 4a and the fitting convex portion 2a so that the cylinder inner 2 can move to the left side in the drawing.
When the key 10 is wiped off at the lock position, the lock shaft 5 projects into the mounting portion 9 as shown by the urging force of the lock shaft spring 6 and engages with the groove (not shown) of the steering shaft to operate the steering wheel. The axis is locked. Reference numeral 11 denotes a spring which is provided between the cylinder inner 2 and the cam 4 and biases the cylinder inner 2 to the right in the drawing. Reference numeral 15 is a stopper member arranged in a storage space 16 provided in the cylinder outer 3, and is supported so as to be movable in the storage space 16 along the axial direction of the cylinder lock. Is urged by. Reference numeral 18 denotes a rotating body that is configured to move and rotate integrally with the tip of the cylinder inner 2, and as shown in FIG.
And a unidirectional locking portion 20 adjacent to the locking projection 19.
Is projected. These locking projections 19 and unidirectional locking parts
20 is formed at a position where it can be engaged with the tip of the stopper member 15, and the side of the one-way locking portion 20 in the ON position direction is inclined 20
a, a surface 26b along the axial direction on the lock position direction side.

This embodiment is constructed as described above, and the operation of the two-motion mechanism will be described below with reference to FIG. Figure 2 (a)
Shows a state in which the steering shaft is locked by inserting and removing the key 10 and by pulling out the key 10. In this state, insert the key 10 and rotate it in the ON position direction, that is, clockwise when viewed from the insertion side,
(B) As shown in the figure, the inclined surface 20a of the one-way locking portion 20 pushes the tip of the stopper member 15 to move it against the biasing force of the spring 17 in the right direction in the figure, so that the cylinder inner 2 is Can rotate regardless of the stopper member 15
When 15 gets over the one-way locking portion 20, it returns to its original position by the urging force of the spring 17, and the state shown in FIG. This is, for example, the ACC position, and thereafter, the cylinder inner 2 can be rotated to the ON position without any trouble, and the vehicle can be driven by starting the engine.

On the other hand, from the ON position toward the lock position, the cylinder inner 2
In the case of rotating the return member back, the surface 20b of the one-way locking portion 20 engages with the stopper member 15 as shown in FIG. This position is the return rotation preventing position, and when the key 10 is pushed in here, there is a play between the fitting convex portion 2a of the cylinder inner 2 and the concave portion 4a of the cam member 4, so that the cylinder inner 2 Moves to the left in the figure, and the one-way locking portion 20 moves together. At this time, since the stopper member 15 is in the storage space 16 and cannot move, the engagement with the stopper member 15 is released (d).
In the state shown in the figure, when the key 10 is pressed and rotated in the lock position direction, the cylinder inner 2 can be returned and rotated to the lock position shown in FIG. That is,
In order to return and rotate from the ON position direction to the lock position, a second operation of pressing the key 10 is required in addition to the rotation operation in the return direction, and the two-motion type safety function is exhibited. The movement of the cylinder inner 2 in the pushing direction of the key 10 must be at least within the rotation range necessary for the return rotation with the engagement between the one-way locking portion 20 and the stopper member 15 being released. For example, the shapes of the rotating body 18 and the cylinder outer 3 are appropriately designed to allow movement within this range.

A play is provided between the convex portion 2a of the cylinder inner 2 and the concave portion 4a of the cam member 4 so that the cylinder inner 2 can be moved leftward in the figure, but the cam member 4 is moved rightward. Is blocked by the engaging projection 7a of the lid 7 and cannot move to the right.

(Effect of the Invention) As is apparent from the above description, according to the present invention, the cylinder for the cam member is provided in the lid for holding the lock shaft spring while covering the opening for incorporating the lock shaft and the lock shaft spring. Since the blocking portion that blocks the movement toward the inner side is integrally formed, the cam member is blocked by the blocking portion of the lid without separately providing a blocking member, and does not move to the cylinder inner side.
The engagement with the lock shaft does not come off. Therefore,
The number of parts is small and the assembly structure is simple,
It has the effect that the manufacturing cost can be reduced accordingly. Further, since the one-way locking portion is engaged with the stopper member, the abnormal locking of the steering shaft can be prevented with a simple structure and the locking can be released by a simple operation.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of an embodiment of the present invention, and FIG. 2 is an operation explanatory view. 1 ... Body, 2 ... Cylinder inner, 2a ... Fitting convex part, 3 ... Cylinder outer, 4 ... Cam member, 4a ... Fitting concave part, 5 ... Lock shaft, 6 ... Lock shaft spring , 7 ... Lid, 7a ... Engaging convex part (blocking part), 10 ... Key, 11 ... Spring, 15 ... Stopper member.

Claims (1)

[Scope of utility model registration request] 1. A cylinder inner that is movably held in a key pushing direction at least at a return rotation preventing position and is urged in a key pulling direction; and a cylinder inner that moves integrally with the cylinder inner and is in an ON position direction side. A unidirectional locking portion having an inclined surface on the side of the rotation blocking position and having a surface along the axial direction parallel to the pushing direction; A stopper member that is disengaged from the one-way locking portion when moved in the pushing direction, a lock shaft that projects from the opening hole and locks the steering shaft so that the steering shaft cannot rotate, and the lock shaft is the opening hole. A lock shaft spring that urges in a direction of further projecting, and the lock shaft and the lock shaft spring that are formed in a direction opposite to the opening hole. A lid for holding the lock shaft spring and a cam member that engages with the lock shaft and retracts the lock shaft into the opening hole according to the rotation of the cylinder inner. And a blocking portion that is integrally formed with the lid and that blocks movement of the cam member toward the cylinder inner side.