JP5587748B2 - Steering lock device - Google Patents

Description

  The present invention relates to a steering lock device used by being fixed to a steering column of a vehicle.

  As a steering lock device for locking a steering operation of a vehicle, the one described in Patent Document 1 is known. In this conventional example, the steering lock device includes a lock shaft that is held in a guide opening formed in a body that holds a cylinder inner and moves in a disengagement direction with respect to the steering shaft, and a recess that is opened along the guide opening. A lock plate that is housed in the groove and rotates between the initial position and the operation position and restricts the movement of the lock piece to the unlocking position side with respect to the steering shaft in the operation position, and the longitudinal direction of the plug. And a plate arranged.

  The lock plate is urged toward the operating position by a torsion spring and is pivotally supported around the pin so as to be supported by the plate and held at the initial position.

  When the body is broken and the plate moves in the pulling direction, the lock plate that has lost its support moves to the operating position and the locking projection locks to the lock shaft, and then the lock shaft moves to the unlocking position. Is regulated.

JP 2004-114730 A

  However, the above-described conventional example has the disadvantages that the structure is complicated and the assembly efficiency is poor because the lock plate rotates in a plane parallel to the moving direction of the lock shaft.

  That is, in order to hold the lock plate in the operating position when a force is applied to the lock shaft in the unlocking direction with respect to the steering shaft while the lock shaft is restrained, both ends of the pin that pivotally supports the lock plate are recessed. It is necessary to prevent the lock plate from moving in the moving direction by immovably fixing it to the wall surface of the groove.

  On the other hand, the concave groove needs to be formed into a deep groove shape in the longitudinal direction of the guide opening in order to accommodate the lock plate, and the work of fixing both ends of the pin with the torsion spring between the opposing wall surfaces of the concave groove is In addition to the cumbersome work of standing the pin in the middle of the wall surface, the mounting of the lock shaft or the mounting work of the lid for closing the guide opening is performed along the depth direction of the guide opening. However, since the work is performed along work lines orthogonal to these, work efficiency is reduced.

  The present invention has been made to eliminate the above-described drawbacks, and an object of the present invention is to provide a steering lock device having a simple structure and good assembly workability.

  The steering lock device includes a plug 2, a lock piece 3, a lock stopper 6, and a detection unit 7 that are accommodated in the housing 1, and the lock piece 3 is turned into a steering shaft in the steering column 4 by rotating the plug 2. It is comprised so that it may move between the lock position latched by 5 and the unlock position where latching is cancelled | released.

  The lock piece 3 moves in a direction substantially orthogonal to the rotation center of the plug 2, and the lock stopper 6 is in a plane substantially orthogonal to the movement direction of the lock piece 3, that is, substantially parallel to the rotation center of the plug 2. Is pivotally supported in a smooth plane, and rotates and moves from the initial position to the operating position. At the operating position, the movement path to the unlock position side of the lock piece 3 is blocked, and the transition to the unlocked state is restricted. The

  The detection unit 7 can move from the initial position to the detection position by detecting a pulling operation exceeding a predetermined value in the pulling direction of the plug 2 with respect to the housing 1, and closes the movement path to the operating position side of the lock stopper 6 at the initial position. Then, the lock stopper 6 is held at the initial position.

  In the present invention in which the lock stopper 6 moves in a plane substantially perpendicular to the moving direction of the lock piece 3, the lock stopper 6 matches the mounting direction of the lock piece 3. Since the mounting work can be performed by sequentially stacking the parts, the work efficiency is improved. In addition, since the lock stopper 6 rotates and moves from the initial position to the operating position, the structure of the movement path is not required as compared with the case where the lock stopper 6 is translated, and the structure is simplified.

  When the housing 1 is molded by a molding die, the guide opening 10 for receiving and guiding the lock piece 3 has a cap at the open end of the bottomed opening 8 of the housing 1 with one end opened and the other end closed. It can be formed by being closed by the member 9. In this case, when the lock stopper 6 is disposed at the boundary with the cap member 9, the lock stopper 6 is placed in a stack in the mounting recess of the lock stopper 6 formed on the mounting surface of the cap member 9 of the housing 1, and then the cap Since the mounting operation is completed simply by fixing the member 9, the assembling workability of the housing 1 is improved. Further, the mounting recess of the lock stopper 6 can be formed only by a shape having a depth direction in the insertion direction of the bottomed opening 8, that is, the mold or the mold releasing direction of the core. There is no need to use a new core for the mold due to the occurrence of undercutting or post-processing after molding.

Furthermore, when the bottomed opening 8 is opened to the steering column 4 side and the open end is closed by the cap member 9 provided with the lock piece insertion hole 11, a connecting portion with the cap member 9 that is susceptible to an attack from the outside is provided. Since it can be located at the boundary with the steering column 4, it is possible to increase the resistance against the destruction attack of the connected portion. Further, the lock piece 3 functions as an advance / retreat hole from the guide opening 10 and has a fitting protrusion to the lock piece insertion hole 11 having many sliding contact opportunities with the lock piece 3 or an access opening provided in the steering column 4. For example, when the housing 1 is formed of a magnesium alloy or the like, the cap member 9 is formed of a zinc alloy or the like. It is also possible to reinforce the lock projection insertion hole 11 or the fitting projection 9a to the access opening.
According to the present invention,
A steering lock device in which the lock piece 3 is moved in a direction substantially perpendicular to the center of rotation of the plug 2 by rotating the plug 2 accommodated in the housing 1 and is engaged with and disengaged from the steering shaft 5 in the steering column 4. There,
The housing 1 is urged toward the operating position from the initial position to the operating position, and is pivotally supported in a plane substantially orthogonal to the moving direction of the lock piece 3 so that the lock piece 3 is unlocked at the operating position. A lock stopper 6 for closing the movement path to
A pulling operation exceeding a predetermined value in the pulling direction of the plug 2 with respect to the housing 1 can be detected and moved from the initial position to the detecting position, and the movement path to the operating position side of the lock stopper 6 is closed at the initial position. A detector 7 for holding the lock stopper 6 in an initial position;
It is also possible to provide a steering lock device having

  According to the present invention, the structure can be simplified and the assembly workability can be improved.

It is sectional drawing which shows a steering lock apparatus. It is a figure which shows a steering lock apparatus, (a) is a 2A direction arrow line view of FIG. 1, (b) is the principal part enlarged view of (a) which removed the cap member. 1A is a cross-sectional view taken along line 3A-3A in FIG. 1, and FIG. 3B is a cross-sectional view taken along line 3B-3B in FIG. It is a figure which shows operation | movement of a lock piece, (a) is the sectional view on the 4A-4A line of FIG.2 (b) in a locked state, (b) is sectional drawing which shows an unlocked state. It is a figure which shows operation | movement when a housing fractures | rupture, (a) is a figure corresponding to FIG.2 (b), (b) is the 5B-5B sectional view taken on the line of Fig.5 (a). It is a longitudinal cross-sectional view which shows other embodiment of this invention. 7A is a sectional view taken along line 7A-7A, and FIG. 7B is a sectional view taken along line 7B-7B. It is a figure which shows operation | movement of a lock stopper, (a) is a figure which shows an initial position, (b) is a figure which shows an operation position.

  As shown in FIG. 1 and subsequent figures, the steering lock device includes a housing 1, a cylinder lock 15 in which a plug 2 is inserted into a plug case 15 a fixed to the housing 1, and a camshaft 16 connected to the rear end of the plug 2. And the lock piece 3 driven by the camshaft 16.

  A tumbler (not shown) is attached to the plug 2, and a rotation operation with respect to the plug case 15 a, that is, the housing 1 is allowed only when a genuine unlocking key is inserted. At the rear end portion of the plug 2, a retaining flange 2 a that abuts the rear end surface of the plug case 15 a and restricts the forward removal from the plug case 15 a is formed.

  Further, in order to transmit the rotation operation to the plug 2 to the camshaft 16, a connecting projection 2 b protrudes from the rear end of the plug 2 and is fitted into a connecting recess 16 a formed at the front end of the camshaft 16. Is done. At the rear end of the camshaft 16, an ignition operation projection 16c for operating an ignition switch (not shown) is provided.

  In order to enable a rotation operation with a pushing operation to the plug 2, the connecting projection 2b can be moved rearward along the connecting recess 16a, and the plug 2 is compressed by the compression spring 16b accommodated in the connecting recess 16a. In front, the camshaft 16 is urged rearward to prevent mutual rattling and to generate a push reaction force against the pushing operation.

  Further, a break guide 17 is formed at the rear end of the plug 2 by rapidly reducing the cross-sectional area. The fracture guide 17 is disposed in front of the retaining flange 2a, and when an inappropriate torsional force is applied to the front end portion of the plug 2, the rupture guide 2b is disconnected to transmit the unauthorized operation force to the linking projection 2b. In addition, it is possible to detect at the detection unit 7 to be described later by limiting the breakage point when an unauthorized pulling force is applied to the plug 2.

  On the other hand, the housing 1 is obtained by die-casting a zinc alloy, and has a housing body 18 provided with a switch holding portion 18a for holding an ignition switch (not shown) at the rear end, and one end formed on the housing body 18. And a cap member 9 that closes the open end of the bottomed opening 8 that is closed and the other end is opened. The switch holding portion 18a and the rotation axis of the plug 2 of the cylinder lock 15 are arranged substantially in a straight line, and the bottomed opening 8 is arranged in a posture substantially orthogonal to the rotation axis of the plug 2, The opening 8 and the cap member 9 constitute a guide opening 10 for guiding a lock piece 3 to be described later.

  Further, the housing body 18 is formed with a column fixing portion 19 having a curved contact surface 19a that is fixed to the steering column 4 by sandwiching the steering column 4 in cooperation with a fixer member (not shown). The open end of the bottomed opening 8 is opened toward the curved contact surface 19a.

  Furthermore, the fracture guide 14 is formed in the housing body 18 by making cuts in the entire outer periphery of the fitting portion of the plug case 15a. The breaking guide 14 is broken and the cylinder lock 15 is detached when an improper breaking force is applied to the head of the housing 1.

  At the center of the cap member 9 that closes the open end of the bottomed opening 8 is formed a lock piece insertion hole 11 through which a lock piece 3 described later is inserted, and at the periphery of the lock piece insertion hole 11 A fitting protrusion 9 a that bulges outward, that is, toward the steering column 4 and fits into an access opening provided in the steering column 4 to position the mounting position on the steering column 4 is formed.

  The lock piece 3 is a plate-like member having a predetermined strength, such as a steel plate, and is housed in the bottomed opening 8 of the housing main body 18 described above, and is held so as to be movable in translation in a direction perpendicular to the rotation center of the plug 2. Is done. A compression spring 3 a is inserted into the bottomed opening 8 and biases the lock piece 3 outward, that is, toward the steering column 4.

  The lock piece 3 advances and retreats outward through the lock piece insertion hole 11, and the stopper projection 3 b protruding from both side walls is brought into contact with the cap member 9, so that separation from the guide opening 10 is restricted.

  A cam opening 13 is opened at the center of the lock piece 3 and the camshaft 16 is inserted therethrough. The camshaft 16 is formed with a cam portion 12 corresponding to the cam receiving portion 13a in the cam opening 13, and when the plug 2 is in a locked state as shown in FIG. The stopper projection 3b comes into contact with the cap member 9 by the urging force of 3a, and the distal end portion of the lock piece 3 is held at the lock position where it protrudes into the steering column 4 to be locked. A gap is set between the cam portion 12 and the cam receiving portion 13a on the lock piece 3 side in the locked position, and the cam portion 12 and the cam receiving portion 13a when moved from the unlocked position to the locked position by the biasing force. The collision with is prevented.

  When the plug 2 is rotated from the above-mentioned locked state, the lock piece 3 is driven upward against the urging force of the compression spring 3a as shown in FIG. Move to the unlock position.

  Further, a detection unit 7 and a lock stopper 6 are disposed in the housing 1. As shown in FIGS. 1 and 2, the detection unit 7 is a hook-shaped member disposed along the rotation axis of the plug 2 and is urged forward by a compression spring 7 a disposed at the intermediate portion.

  A plug abutting portion 7b is formed at one end of the detecting portion 7 so as to be in pressure contact with the proximal end surface of the fracture guide 14 of the plug 2 by the urging force, and a stopper abutting near the 10 portion of the guide opening at the other end. Part 7c is formed. As shown in FIG. 2B, a gap is provided between the stopper abutting portion 7 c and the lock piece 3 to absorb the pushable amount of the plug 2.

  On the other hand, the lock stopper 6 is formed of a plate material, and, as shown in FIG. 2, one end portion is pivotally supported by the housing body 18 by a support shaft 6a, ) Between the initial position located along the side wall surface of the lock piece 3 and the operating position entering the guide opening 10 as shown in FIG.

  Further, the lock stopper 6 is urged toward the operating position by the compression spring 6b, and the movement to the operating position is restricted by being brought into contact with the side edge of the detection unit 7, and is held at the initial position.

  Therefore, in this embodiment, in the locked state, for example, when an improper breaking force is applied to the head of the housing 1, the housing body 18 is broken from the breaking guide 14, and the cylinder lock 15 is moved away from the housing 1. break away. As shown in FIG. 1, the detection unit 7 supported by the plug 2 and held at the initial position as the cylinder lock 15 is released slides forward by the urging force of the compression spring 7a and moves to the detection position. .

  As shown in FIG. 5A, the lock stopper 6 that has lost its support as the detection unit 7 moves to the detection position is rotated to the operating position by the urging force of the compression spring 6b. As shown in FIG. 5 (b), the lock stopper 6 enters the cam opening 13 of the lock piece 3 in the operating position and directly faces the stopper protrusion 13b formed in the cam opening 13, and thereafter the lock stopper 6 is locked. The movement of the piece 3 to the unlock position, that is, the transition to the unlocked state is prohibited.

When the cylinder lock 15 or the plug 2 is pulled out or torsioned in addition to the above-described illegal destruction operation to the head of the housing 1, similarly, the transition to the detection position of the detection unit 7 and the lock stopper 6 are performed. Transition to the operating position occurs, the transition to the unlocked state is prohibited, and the locked state is maintained.
The lock stopper 6 is supported by a shaft support portion of the housing body 18, is placed in a stacking manner in the mounting recess of the housing body 18, and is closed by a cap member 9. Therefore, when a force that forcibly shifts the lock piece 3 to the unlocked state is applied to the lock stopper 6 at the operating position, the wide surface of the lock stopper 6 abuts on the mounting recess of the housing body 18 and maintains the locked state. .

  FIG. 6 and subsequent figures show other embodiments of the present invention. In the following description of the embodiment, components that are substantially the same as those of the above-described embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted.

  In the present embodiment, the housing 1 closes the housing main body 18 provided with the guide opening 10 opened on the steering column 4 side (upper side) and the opposite end side (lower side), and the lower opening of the housing main body 18. And a lid member 20 for closing the upper opening.

  Moreover, the lock piece 3 is formed in a low profile as compared with the above-described embodiment, and the hanger member 21 is connected so as to complement the upper part. The hanger member 21 is given a downward biasing force by the compression spring 3 a, and as a result, the lock piece 3 is biased toward the lock position protruding from the lock piece insertion hole 11 of the cap member 9. Further, the hanger member 21 is formed with a stopper projection 3b, which is in contact with a stopper step portion 18b formed on the housing main body 18 to determine the stroke end of the lock piece 3 on the lock position side.

  The hanger member 21 has a forward bulging portion 21a, and as shown in FIG. 7A, a cam receiving portion 13a corresponding to the cam portion 12 of the camshaft 16 is formed on the bulging portion 21a. Thus, the hanger member 21 and the lock piece 3 can be moved to the unlocked position by rotating the plug 2.

  The lock piece 3 is formed as a plate-like member as shown in FIG. 7B by offsetting in the front-rear direction without making the moving surface of the lock piece 3 and the operation surface of the cam receiving portion 13a the same surface. In addition, since it is not necessary to set a large operating space for the cam portion 21 (the cam opening 13 in the above-described embodiment), the width dimension of the lock piece 3 and thus the apparatus can be reduced.

  Further, with the abolishment of the cam opening 13, the stopper projection 13b is formed in a notch shape on the outer peripheral wall surface of the lock piece 3, and the lock stopper 6 is moved by the movement of the detection unit 7 as in the above-described embodiment. Thus, the movement of the lock piece 3 in the unlocking direction is restricted.

DESCRIPTION OF SYMBOLS 1 Housing 2 Plug 3 Lock piece 4 Steering column 5 Steering shaft 6 Lock stopper 7 Detection part 8 Bottomed opening part 9 Cap member 10 Guide opening 11 Lock piece insertion hole 12 Cam part 13 Cam opening 14 Breaking guide

Claims (5)

A steering lock device for moving a lock piece in a direction substantially perpendicular to the rotation center of the plug by rotating the plug accommodated in the housing and engaging / disengaging the steering shaft in the steering column,
The housing is urged toward the operating position from the initial position to the operating position, and is pivotally supported in a plane substantially orthogonal to the moving direction of the lock piece. In the operating position, the lock piece moves to the unlocking position side. A lock stopper that closes the path;
The lock stopper can be moved from an initial position to a detection position by detecting a pull-out operation exceeding a predetermined value in the pull-out direction of the plug with respect to the housing. A detector that holds the
I have a,
The lock piece is inserted from the open end into the bottomed opening having one end opened in the housing and closed at the other end, and the open end is closed by a cap member and attached to the housing. ,
The lock stopper is inserted into a mounting recess formed on the cap member mounting seat surface of the housing from a direction coinciding with the lock piece, and is fixed to the housing by closing the mounting recess by fixing the cap member. Locking device. The bottomed opening is formed open to the steering column side,
The steering lock device according to claim 1 , wherein the lock piece advances and retracts toward the steering column side through a lock piece insertion hole formed in the cap member . 3. The steering lock device according to claim 1, wherein the lock stopper is engaged with a wall surface of a cam opening through which a cam portion rotated by a plug is inserted in an operating position . 4. The steering lock device according to claim 1, wherein the detecting portion is biased toward the front end of the plug, the front end is abutted against the plug, and is held at an initial position . The steering lock device according to claim 1, 2, 3, or 4, wherein the plug holding portion of the housing is provided with a break guide .

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