JP2011213248A - Steering lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steering lock device capable of surely securing a locking dimension to a steering wheel in a lock state.SOLUTION: This steering lock device includes a housing 2 fixed to a steering column 1 and a lock member 6 stored into the housing 2, entering into the steering column 1 from an access opening 3 opened in the steering column 1 and engaged with/disengaged from a steering shaft 5 through an operation of a locking/unlocking operation part 4. The lock member 6 is energized to a locking position side with the steering shaft 5 by a proper energizing means 7. The lock member 6 is provided with a stopper projecting part 8 abutting on the steering column 1 to determine a stroke terminal on the locking position side of the lock member 6.

Description

  The present invention relates to a steering lock device.

  As a steering lock device for restricting a steering operation by engaging a lock member with a steering shaft, a device described in Patent Document 1 is known. In this conventional example, the lock shaft (lock member) is housed in a sliding hole formed in the housing, and the position between the lock position where the tip portion engages with the steering shaft by the cam and the unlock position where the engagement is released. It is driven by.

Japanese Patent Laid-Open No. 2003-2168

  However, in the above-described conventional example, the protrusion dimension of the lock member to the steering column at the lock position is completely determined by the position of the cam, that is, the dimension on the steering lock apparatus side. When an error occurs in the position, there is a problem in that the projection dimension is insufficient, resulting in a lack of a locking dimension in a lock shape with the steering wheel, which may reduce the lock strength.

  The present invention has been made to eliminate the above-described drawbacks, and it is an object of the present invention to provide a steering lock device and a structure of a steering lock portion that can surely secure a locking dimension to a steering in a locked state. And

  The steering lock device enters the steering column 1 through a housing 2 fixed to the steering column 1 and an access opening 3 accommodated in the housing 2 and opened in the steering column 1, and is operated by operating the locking / unlocking operation unit 4. And a lock member 6 that engages and disengages with the steering shaft 5.

  The lock member 6 is urged toward the locking position (lock position) with the steering shaft 5 by an appropriate urging means 7, and the stroke end on the lock position side is a stopper protrusion formed on the lock member 6. 8 is brought into contact with the steering column 1 and determined.

  Therefore, in the present invention, even if an error occurs in the mounting position of the steering lock device to the steering column 1, the lock member 6 moves until the stopper projection 8 contacts the steering column 1. The locking dimension is ensured and the lock strength is ensured.

  Further, by restricting the stroke of the lock member 6 in the protruding direction by the steering column 1, the lock member 6 is located near the access opening 3 side opening end of the lock receiving opening 9 formed in the housing 2 for receiving the lock member 6. There is no need to set a retaining part for

  When the access opening 3 of the lock housing opening 9 is provided at the opening end of the lock housing opening 9, when the housing 2 is formed by injection molding, the lock housing opening 9 is formed as an opening opened to the access opening 3 side. Since the retaining portion is undercut, it needs to be formed as an opening portion opened in the opposite direction. In such a structure, after the lock member 6 is inserted from the opening portion of the lock receiving opening 9, that is, from the side opposite to the access opening 3, the biasing means 7 is inserted, and the opening portion is further connected to an appropriate closing member. In addition, it is necessary to install the closing member, and the closing portion by the closing member can be accessed from the outside with the steering lock device attached to the steering column 1. This leads to the drawback of being easily manipulated.

  On the other hand, in the present invention in which it is not necessary to set a retaining portion for the lock member 6 in the vicinity of the access opening 3 side opening end of the lock housing opening 9, the lock housing opening 9 is set to the access opening 3 side. It is possible to form as a non-undercut opening that does not undercut in the drawing direction, which can be molded by a metal mold or a slide mold, and as a result, the opposite end to the access opening 3 is formed as a blocking wall during molding It is possible to prevent unauthorized access opportunities.

Further, the lock member 6 is driven between a locking and unlocking position with the steering shaft 5 as a driven cam in which the cam receiving surface 11 is pressed against the camshaft 10 that is rotated by a locking / unlocking operation,
If a steering lock device is configured that interferes with the camshaft 10 and is prevented from being detached from the lock receiving opening 9 before being attached to the steering column 1, it is not necessary to provide a means for preventing the lock member 6 from falling off in the steering lock device. .

  Further, when the locking stroke end of the locking member 6 with the steering shaft 5 is determined by contact with the steering column 1 having high strength, the movement of the locking member 6 to the locking stroke end is biased. Even when the restoring force such as 7 is used, it is possible to prevent, for example, a collision with a cam or the like that operates the lock member 6.

As a result, the locking / unlocking operation unit 4 is rotated by the unlocking key 12 and the cylinder lock 13 that drives the lock member 6 to the unlocking position with the steering shaft 5 by the unlocking rotation operation,
As the cylinder lock 13 moves to the unlocking position of the lock member 6, the lock member 6 is elastically locked to the lever locking portion 14 formed on the lock member 6 to lock the lock member 6. And the lock lever 6 is released from the cylinder lock 13 and released from the cylinder lock 13 to move the lock member 6 to the lock position with the steering shaft 5. Eliminating the inadvertent steering locking operation caused by damage to the cam or the like even when the unlocking key 12 is used as a locking operation by the locking member 6 as in the case of a steering locking device having Can be ensured.

  According to the present invention, it is possible to reliably ensure the dimension of locking to the steering in the locked state.

It is sectional drawing which shows this invention, (a) is a figure which shows the state which does not insert an unlocking key, (b) is a figure which shows the state which inserted the unlocking key. FIG. 2B is a sectional view taken along line 2A-2A in FIG. It is a figure which shows the state before mounting | wearing to a steering column, (a) is sectional drawing, (b) is a 3B direction arrow directional view of (a), (c) is a principal part enlarged view of (b). It is a figure which shows the mounting state to a steering column, (a) is a figure which shows a locked state, (b) is a figure which shows the middle of the transfer to an unlocked state, (c) is a figure which shows an unlocked state.

  As shown in FIG. 1 and subsequent figures, a steering lock device includes a cylinder lock 13 and a check lever 15 that constitute a locking / unlocking operation unit 4 in a housing 2 in which an ignition switch 16 is fixed at the rear end, and a camshaft. 10. It is formed to accommodate the lock member 6 and is mounted on the steering column 1 on the vehicle side.

  The steering column 1 accommodates a steering shaft 5 having a locking recess 5a, and an access opening 3 is opened at a position where the steering column 1 can face the locking recess 5a.

  As shown in FIG. 2, the steering lock device is fixed to the steering column 1 in such a manner that the positioning projection 2 a protruding from the housing 2 is fitted in the access opening 3 and the fixer frame 17 is attached to the housing 2. This is done by connecting. The fixture frame 17 is connected using bolts 18.

  The cylinder lock 13 is formed by inserting a plug 13 b into a cylinder case 13 a fixed in the housing 2. A plurality of tumblers 13c are attached to the plug 13b, and a rotation operation can be performed by inserting a genuine unlocking key 12. A key detection member 19 is attached to the front end portion of the plug 13b so as to be movable back and forth in a direction perpendicular to the rotation axis.

  The camshaft 10 is linearly connected to the rear end of the plug 13b, and rotates with the rotation of the plug 13b. The rear end of the camshaft 10 is connected to the input portion of the ignition switch 16, and the ignition operation is performed by rotating the plug 13b.

  The lock member 6 is a plate-like member having a cam opening 20 through which the cam portion 10 a of the camshaft 10 is inserted at the center, and is inserted into the lock receiving opening 9 provided in the housing 2. As shown in FIG. 3, the lock receiving opening 9 is formed as an opening extending in a direction orthogonal to the rotation axis of the camshaft 10 and having one end opened at the center of the positioning protrusion 2a. In the present embodiment, which is manufactured by die casting, the lock receiving opening 9 is formed as a non-undercut opening with a bottom and with respect to the mold drawing direction.

  The lock member 6 housed in the lock housing opening 9 formed as described above slides in the lock housing opening 9 and one end enters the steering column 1 as shown in FIG. Between the locking position for locking the steering shaft 5 to lock the steering shaft 5 and locking the steering wheel and the unlocking position for releasing the locking with the locking recess 5a as shown in FIG. To move. A biasing force toward the lock position is applied to the lock member 6 by a compression spring (biasing means 7).

  The lock member 6 is provided with a stopper projection 8 on one side wall surface corresponding to the longitudinal direction of the steering shaft 5, and the lock accommodation opening 9 is provided with a stopper accommodation portion 9 a for accommodating the stopper projection 8. Is done. As shown in FIG. 3 (b), the stopper protrusion 8 has a protrusion length whose tip protrudes beyond the peripheral edge of the positioning protrusion 2a. It is formed so as to cross one side of a rectangular frame formed by the peripheral edge of the protrusion 2 a and the lock receiving opening 9.

  Further, the lock member 6 is formed with a lever locking portion 14 on the wall surface facing the formation wall of the stopper projection 8, and the check lever 15 is engaged and disengaged.

  As shown in FIG. 1, the check lever 15 corresponds to the wall surface on which the key detection protrusion 15a corresponding to the key detection member 19 of the plug 13b is formed at one end and the lever locking portion 14 of the lock member 6 is formed at the other end. It is a plate-like member provided with a lock restricting portion 15b, and is pivotably supported around a movable fulcrum 21 formed at an intermediate portion. The movable fulcrum 21 is movable in the left-right direction in FIG. 1A, and the check lever 15 is given a biasing force in a direction in which the key detection protrusion 15 a is pressed against the key detection member 19 by the compression spring 22.

  As shown in FIG. 1A, in a state where the unlock key 12 is not inserted into the plug 13b, the key detection member 19 of the plug 13b is pressed and buried in the plug 13b by the urging force, and the check lever 15 The clockwise rotational force in FIG. 1A is applied to the whole. Thereafter, as shown in FIG. 1 (b), when the unlocking key 12 is inserted into the plug 13b, the key detecting member 19 is rejected by the unlocking key 12 and moves toward the outside of the plug 13b. The movement of the key detection member 19 gives a counterclockwise rotational force to the check lever 15, but the movement of the lock restricting portion 15b is blocked by the lock member 6, so that the movable fulcrum 21 is shown in FIG. The amount of displacement is absorbed by moving to the right side in b), and thereafter, the urging force of the compression spring 22 acts as a force for pressing the stopper protrusion 8 against the side wall of the lock member 6 (see FIG. 3).

  When the lock member 6 moves to the unlocked position from this state, the lock restricting portion 15b of the check lever 15 and the lever locking portion 14 of the lock member 6 face each other, and the check lever 15 elastically moves to the lever locking portion. Engage (see FIG. 4C).

  As shown in FIG. 3, the cam portion 10 a of the camshaft 10 has a linear first cam surface 10 b and a second cam surface 10 c formed from an arc surface centering on the rotation center of the camshaft 10. At the same time, a cam receiving surface 11 corresponding to the first cam surface 10b of the cam portion 10a is formed in the cam opening 20 of the lock member 6 when the plug 13b is in the initial rotation position corresponding to the locked state. .

  When the steering lock device shown in FIG. 3 is not attached to the steering column 1, the lock member 6 is detached from the lock receiving opening 9 with the cam receiving surface 11 in contact with the first cam surface 10 b of the camshaft 10. Separation is restricted, and the stopper protrusion 8 slightly protrudes (δ) from the surface of the column contact portion 2 b of the housing 2.

  When the steering lock device is mounted on the steering column 1 from this state, as shown in FIG. 4A, the stopper protrusion 8 interferes with the steering column 1, so that the lock member 6 is slightly pushed up from the original position, A gap (d) is generated between the first cam surface 10 b and the cam receiving surface 11. In this way, by mounting on the steering column 1, the stroke of the locking member 6 in the protruding direction from the housing 2, that is, the stroke end position at the lock position is determined.

  In this state, when the plug 13b is operated with the genuine unlocking key 12 and rotated in the unlocking direction, the cam receiving surface 11 is pushed up to the first cam surface 10b as shown in FIG. The member 6 moves in the unlock position direction. Further, when the plug 13b is rotated and the lock member 6 reaches the unlock position, the above-described check lever 15 is locked to the lever locking portion 14, and thereafter the movement of the lock member 6 is restricted.

  When the lock member 6 is moved to the unlock position and the operation of the lock member 6 is restricted, the second cam surface 10c comes into contact with the cam receiving surface 11, and the plug 13b is rotated to the “START” position, for example. Can be made. Further, as shown in FIG. 4C, even when the plug 13b is returned to the locked position, the lock member 6 is held at the unlocked position until the unlock key 12 is removed. When the unlocking key 12 is removed, the locking member 6 is moved to the locking position until the stopper projection 8 comes into contact with the steering column 1 by the restoring force of the compression spring 7. At this time, FIG. As shown in FIG. 4, the gap (d) set between the first cam surface 10b and the cam receiving surface 11 prevents both surfaces from colliding with each other, and peeling of the surface layer due to the collision is completely prevented. Can be removed.

DESCRIPTION OF SYMBOLS 1 Steering column 2 Housing 3 Access opening 4 Locking / unlocking operation part 5 Steering shaft 6 Lock member 7 Energizing means 8 Stopper projection 9 Lock accommodation opening 10 Camshaft 11 Cam receiving surface 12 Unlocking key 13 Cylinder lock 14 Lever locking part 15 Check lever

Claims (5)

A housing fixed to the steering column;
A lock member that is housed in the housing and enters the steering column from an access opening opened in the steering column, and is engaged with and disengaged from the steering shaft by an operation to the locking / unlocking operation unit;
The lock member is urged toward the locking position with the steering shaft by an appropriate urging means,
A steering lock device, wherein the lock member is provided with a stopper protrusion that contacts the steering column and determines a stroke end on the locking position side of the lock member.   The steering lock device according to claim 1, wherein the lock member is housed in a lock housing opening formed as a bottomed opening that is open to the access opening side and a non-undercut opening during molding. The lock member is driven between a locking position and a locking release position with a steering shaft as a driven cam whose cam receiving surface is pressed against a camshaft that is rotated by a locking / unlocking operation,
The steering lock device according to claim 2, wherein the steering lock device is restricted from being detached from the lock receiving opening before being attached to the steering column due to interference with the camshaft. The locking / unlocking operation unit is rotated by an unlocking key, and a cylinder lock that drives the lock member to a locking release position with the steering shaft by unlocking rotation operation;
As the cylinder lock moves to the lock release position of the lock member, the lock member is elastically locked to the lever lock portion formed on the lock member to hold the lock member in the lock release position. 4. A check lever for releasing the lock with the lever lock portion and removing the lock key from the cylinder lock to move the lock member to the lock position with the steering shaft. Steering lock device. A steering lock device that houses a lock member in the housing is fixed to the steering column, and the lock member that enters from the access opening provided in the steering column is engaged with and disengaged from the steering shaft in the steering column to lock and unlock the steering shaft. A steering lock structure that
The lock member is urged toward the locking position with the steering shaft,
The structure of the steering lock portion in which the stroke end position on the locking position side is determined by contact with the steering column.

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