JP5005485B2 - Steering lock device - Google Patents

Description

  The present invention relates to a steering lock device for locking a steering of an automobile or the like for the purpose of preventing theft.

  This type of steering lock device is disposed on a steering shaft that rotates in response to a steering operation of an automobile. When the driver inserts a mechanical key having a mechanical structure into the key hole and rotates the LOCK position from the LOCK position toward the START position in order to start the engine, the advancing / retracting lock bolt moves backward, and the lock bolt The lock on the steering shaft is released. Conversely, to stop the engine, the mechanical key is rotated from the ON position to the LOCK position, and when the mechanical key is pulled out, the lock bolt advances and engages with the steering shaft to be locked. Yes.

  Prior art document information relating to this steering lock device includes the following.

Japanese Utility Model Publication No. 63-192166

  In Patent Document 1, in order to prevent the steering shaft from being locked when the driver rotates the key to the LOCK position by an erroneous operation, the rotation from the ON position to the LOCK position is so-called. A two-motion steering lock device is described.

  In this steering lock device, the cylinder is disposed so as to be movable in the key insertion direction with respect to the holder, and is biased by the biasing means in the opposite (outward) direction from the key insertion direction. Then, a locking portion that protrudes outward is provided on the outer peripheral portion of the cylinder, and it rotates at a predetermined position (ACC position) between the ON position and the LOCK position by interfering with the locking receiving portion of the holder. Stop. In this state, by pushing the key along the insertion direction, the cylinder is pushed along the axial direction, and the lock between the lock receiving portion and the lock portion is released to enable the cylinder to rotate. Thus, it can be rotated to the LOCK position.

  However, the driver (user) psychologically feels such a two-motion rotation operation troublesome, but gradually gets used to the operation feeling, so the user presses the key unconsciously. Then, since an erroneous operation is performed unconsciously, the original purpose of preventing an erroneous operation may not be achieved.

  The present invention has been made in view of conventional problems, and an object of the present invention is to provide a steering lock device that can reliably prevent steering lock due to an erroneous operation.

In order to solve the above problems, the steering lock device of the present invention is disposed in the housing so as to be movable along the key insertion direction, and is biased in the opposite direction with respect to the key insertion direction, A cylinder that can rotate from the ON position through the START position to the START position, and in conjunction with the rotation of the cylinder, moves to the lock position where it can engage with the steering shaft at the LOCK position, and engages with the steering shaft at other positions. A lock bolt that moves to an unlock position where the cylinder is released, a rotation blocking unit that prevents the cylinder from rotating at a predetermined position when the LOCK is rotated from the ON position to the LOCK position of the cylinder, Push-in operation that enables push-in operation along the key insertion direction only at the blocking position and disables rotation of the cylinder in the push-in state. A control unit, in the steering lock device provided with a blocking state release unit for releasing the rotation preventing state by the rotation preventing portion by push operation, the rotation preventing unit, in the housing, the key insertion A stopper member disposed so as to be urged along the direction, and a locking portion provided on the cylinder so as to be positioned at the tip of the urging direction of the stopper member, and the blocking state release portion includes: It is provided in a holder that accommodates the housing or the cylinder so as to be rotatable, and accommodates the stopper member so as to be able to advance and retract, and can swing the stopper member along a substantially tangential direction with respect to the rotational direction of the cylinder. And an urging member for urging the stopper member from the LOCK position side to the START position side in the accommodating part .

  When the LOCK rotation operation is performed, the steering lock device cannot be rotated at a predetermined position by the rotation prevention unit. The cylinder allows the push-in operation along the key insertion direction only at the blocking position by the push-in restricting portion, and makes the cylinder impossible to rotate in this push-in state. For this reason, the key turning operation by the driver is surely temporarily stopped at the blocking position. Also, when the cylinder is pushed in, the blocking state is released by the blocking state release unit, so that when the driver stops the pushing operation, the key can be turned again and the cylinder is locked. Can be rotated to a position.

  As described above, the steering lock device of the present invention reliably interrupts the key rotation operation at a predetermined position during the LOCK rotation, and does not perform the push-back operation by stopping the push-in operation and the push-in operation. The dynamic operation cannot be resumed. Since such an operation cannot be performed unless the driver consciously performs it, the steering lock due to an erroneous operation can be surely prevented.

Specifically, in this steering lock device, the locking portion includes an inclined surface that retracts the stopper member against an urging force at the time of START rotation from the LOCK position toward the START position, and at the time of LOCK rotation. It is preferable to have a locking surface that contacts the stopper member.

  Further, the push-in restricting portion is provided on a convex portion provided so as to protrude in the key insertion direction with respect to the cylinder, and a member positioned ahead of the cylinder in the key insertion direction. It is preferable to provide a recess capable of fitting the part. In this way, the cylinder can be pushed only at the rotation prevention position, and in the pushed state, the cylinder can be reliably prevented from turning.

  In the steering lock device of the present invention, the turning operation of the key is reliably interrupted at a predetermined position when the LOCK is turned by the turning prevention unit, and the turning operation of the key is resumed unless the pushing operation and the pushing back operation are performed. I can't. Since such an operation cannot be performed unless the driver consciously performs it, the steering lock due to an erroneous operation can be surely prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show a steering lock device (hereinafter abbreviated as “lock device”) according to an embodiment of the present invention. This locking device is disposed in the vicinity of the steering on the steering shaft of the automobile. In general, the cylinder lock 20, the cam member 59, and the lock bolt 64 are disposed inside the housing 10, and the automobile An interlocking member 73 that transmits the rotation of the cylinder lock 20 to an ignition switch 71 that turns on / off the energization of each device is provided.

  In the present embodiment, when the cylinder 36 of the cylinder lock 20 is LOCK rotated from the ON position 23c toward the LOCK position 23a, it is provided in the housing 10 as a rotation preventing portion that prevents rotation at a predetermined position therebetween. A stopper member 32 is disposed, and a locking portion 44 is provided in the cylinder 36. Further, the cylinder 36 is disposed so as to be able to be pushed along the key insertion direction, and the pushing operation can be performed only at the blocking position by the rotation blocking portion, and the cylinder 36 cannot be rotated in the pushed state. As the push restricting portion, a convex portion 48 is provided on the cylinder 36, and a concave portion 54 is provided on a partition plate 49 located in the key insertion direction ahead of the cylinder 36. Further, as a blocking state release unit that releases the blocking state by the rotation blocking unit, the stopper member 32 is disposed so as to be swingable in the accommodating portion 27 formed in the holder 21 and the stopper member 32 is biased. A swinging biasing spring 35 that is a biasing member is provided.

  Specifically, the housing 10 has a substantially L-shaped hollow shape including a lock member disposing portion 11 extending in the horizontal direction and a switch member disposing portion 12 extending in the vertical direction. is there. A projecting plate portion 13 extending in the horizontal direction is provided at the intersection of these arranging portions 11 and 12, and a bearing portion 14 is provided on the projecting plate portion 13 so as to be positioned at the axial center of the switch member arranging portion 12. Yes. Further, a connecting space portion 15 for connecting the cam member 59 and the interlocking member 73 is provided between the protruding plate portion 13 and the inner peripheral surface of the switch member disposing portion 12. The corner portion of the housing 10 is provided with an insertion hole 16 that penetrates along the extending direction of the lock member disposition portion and allows the lock bolt 64 to pass therethrough. In addition, the corner | angular part of the housing 10 in which this insertion hole 16 was formed is inclined according to the inclination angle of the steering shaft (not shown) of the motor vehicle to mount.

  In the present embodiment, the lock member disposing portion 11 accommodates the accommodating portion 27 that bulges outward in the radial direction in the holder 21, which will be described later, constituting the cylinder lock 20, and restricts (positions) the mounting position. A bulging portion 17 is provided. The inner end portion of the bulging portion 17 is not only the insertion end portion of the holder 21 but also the urging direction front end portion of the stopper member 32 housed in the housing portion 27 and stops advancement by urging. The dimensions are set so as to constitute the portion 18. In addition, a lock link disposing portion 19 for swingably disposing the lock link 55 is provided at a lower portion near the opening end of the lock member disposing portion 11.

  The cylinder lock 20 is disposed inside the cylinder 36, a cylindrical holder 21 that is attached to one end of the lock member disposition portion 11, a cylinder 36 that is rotatably disposed inside the holder 21, and the cylinder 36. It has a plurality of tumblers.

  The holder 21 has a substantially cylindrical shape in which a part of the holder 21 is exposed to the lock member disposing part 11 of the housing 10 and the other part is mounted inside. As shown in FIG. 3 (B), the holder 21 is provided with a locking groove 22 for inserting and locking a tumbler protruding radially outward from the cylinder 36 on the inner peripheral surface thereof. Further, as shown in FIG. 3C, the surface of the holder 21 exposed to the outside of the housing 10 is clockwise in the order of the LOCK position 23a, the ACC position 23b, the ON position 23c, and the START position 23d. A notation is engraved at a predetermined position. In the present embodiment, the cylinder 36 is set so as to prevent key operation at the ACC position 23b between the LOCK position 23a and the START position 23d, and the cylinder 36 is set at a position opposed to the ACC position 23b in the radial direction. The notation “PUSH24” is further engraved. The holder 21 is provided with a bracket portion 25 for fixing to the housing 10 at a part of the outer peripheral portion so as to extend along the axial direction. On the inner base portion of the bracket portion 25, a restricting convex portion 26 that restricts the rotation range of the cylinder 36 is provided.

  And the holder 21 of this embodiment is provided with the accommodating part 27 which accommodates the stopper member 32 so that advancement / retraction is possible, as shown to FIG. 3 (A), (B). The accommodating portion 27 is a groove-like shape that is recessed so as to extend outwardly from the insertion end of the housing 10 along the axial direction. In order to form the accommodating portion 27, a part of the holder 21 is in the radial direction. It is formed to bulge outward and is mounted in the bulging portion 17 of the housing 10. In the present embodiment, the accommodating portion 27 constitutes a blocking state releasing portion that releases the rotation blocking state of the cylinder 36 by the stopper member 32, and the stopper member 32 is tangential to the rotation direction of the cylinder 36. Therefore, the side surface 27a located on the LOCK position 23a side is inclined so that the opening area of the opening end is widened. A spring disposing portion 28 for disposing an advancing biasing spring 34 that is a biasing means is provided in the center of the housing portion 27.

  Further, in the holder 21 of the present embodiment, a spring accommodating portion 29 that accommodates a swinging biasing spring 35 that constitutes a blocking state releasing portion with the accommodating portion 27 so as to be positioned on the opening end side of the accommodating portion 27. Is provided. The spring accommodating portion 29 is formed of a recess extending outward in the radial direction from a center in the circumferential direction, and is formed in a state in which the distal end side in the insertion direction of the holder 21 is open. And this open part is covered by arrange | positioning the separate plate member 30 which makes | forms L-shape.

  Furthermore, the insertion recess of the holder 21 is provided with an accommodation recess 31 in which the locking portion 44 of the cylinder 36 is accommodated. The accommodating recess 31 is provided in a substantially C shape so that the locking portion 44 extends over a corresponding movement range in a range in which the cylinder 36 is rotatable. Of course, the opening of the storage portion 27 is located at the bottom of the storage recess 31.

  The stopper member 32 constitutes a rotation blocking portion that blocks the rotation of the cylinder 36 at a predetermined ACC position 23b with the locking portion 44 of the cylinder 36. As shown in FIGS. 1, 2 and 4, the stopper member 32 is made of a rectangular metal plate having a uniform thickness throughout, and has a spring disposing portion 33 extending toward the other end at the center of one end thereof. Is provided. And by being arrange | positioned in the accommodating part 27 with the advancing biasing spring 34, it is urged | biased with respect to the holder 21 so that advancing is possible along the key insertion direction which is an axial direction.

  The stopper member 32 can swing in the tangential direction with respect to the rotation direction of the cylinder 36 in the housing portion 27 by the side surface 27 a of the housing portion 27. Therefore, in the present embodiment, a swinging urging spring 35 that is a urging member that constitutes a blocking state releasing portion with the accommodating portion 27 is disposed in the spring accommodating portion 29 of the holder 21. Thereby, the urging direction by the swing urging spring 35 disposed in the accommodating portion 27 is tangential to the rotational direction of the cylinder 36 and from the LOCK position 23a side to the START position 23d side. It is configured to head. Note that a contact member (not shown) whose contact portion is processed into a substantially spherical curved surface is provided at the front end of the swing biasing spring 35 in the biasing direction in order to reduce resistance due to sliding contact with the side surface of the stopper member 32. Is provided.

  The cylinder 36 has a substantially cylindrical shape, and is disposed in the housing 10 so as to be rotatable from the LOCK position 23a to the ON position 23c through the holder 21 to the START position 23d and in the opposite direction. . Further, the cylinder 36 of the present embodiment is disposed so as to be movable along the key insertion direction which is the axial direction with respect to the housing 10 via the holder 21.

  As shown in FIGS. 1 and 5, the cylinder 36 has a key hole 37 extending along the axis and a plurality of tumbler insertion holes 38 (FIG. 1) arranged side by side so as to extend in a direction orthogonal to the axis. , 2 and 7 are not shown.). In this cylinder 36, the end located on the opposite side to the open end of the key hole 37 is closed, and a flange 39 for positioning at the end of the holder 21 is provided in this closed portion. As shown in FIGS. 5C and 5D, the flange portion 39 has a regulation groove portion for regulating the rotation range of the cylinder 36 with respect to the holder 21 by contacting both ends of the flange portion 39 with the regulation convex portion 26. 40 is provided. Further, as shown in FIG. 1, a detection member disposing portion 41 that is recessed in the radial direction from the outer peripheral portion is provided on the opening end side of the key hole 37 of the cylinder 36. A key detection member 42 that is rotated by being inserted into the key hole 37 is disposed.

  5A to 5D, the cylinder 36 of this embodiment has a substantially rectangular cam mounting portion that protrudes in the key insertion direction along the axial direction from the center of the flange portion 39. 43 is provided. Further, the flange portion 39 is located at the tip of the stopper member 32 in the biasing direction and on the ON position 23c side of the accommodating portion 27 in a state where the cylinder 36 is rotated to the ACC position 23b inside the holder 21. A locking portion 44 is provided on the. The locking portion 44 constitutes a rotation blocking portion that blocks the rotation of the cylinder 36 with the stopper member 32, and is provided so as to protrude in the direction opposite to the key insertion direction. Specifically, the locking portion 44 has an inclined surface 45 that reverses the stopper member 32 against the urging force of the advance urging spring 34 when the START is rotated from the LOCK position 23a to the START position 23d. A cross section having a locking surface 46 that comes into contact (surface contact) with the side surface of the stopper member 32 when the LOCK is rotated, and a contact end surface 47 that extends in the rotational direction of the cylinder 36 between the tips of these surfaces 45 and 46. Further, the flange portion 39 is provided with a convex portion 48 that protrudes in a key insertion direction at a predetermined position on the outer peripheral portion. The convex portion 48 constitutes a pressing restricting portion with a concave portion 54 of the partition plate 49 described later.

  The tumbler (not shown) is disposed in a tumbler insertion hole 38 of the cylinder 36 together with a spring, and has a through-hole through which a key made of a mechanical structure passes. When the key is inserted into the key hole 37 of the cylinder 36, the key pile presses the edge of the through hole of the tumbler, so that each tumbler moves back into the cylinder 36 against the urging force of the spring, thereby holding the holder. 21 is released from the locking groove 22. As a result, by rotating the key, the cylinder 36 can be rotated in the range from the LOCK position 23a to the START position 23d.

  As shown in FIG. 1, in the lock member disposition portion 11 of the housing 10, a partition plate 49 that partitions the lock member disposition portion 11 is disposed at the insertion end of the cylinder lock 20. The partition plate 49 has a predetermined thickness, and a pin hole 51 for fixing to the housing 10 by the pin member 50 is recessed in the outer peripheral surface thereof. Further, as shown in FIG. 6, the partition plate 49 is provided with a through hole 52 through which the cam mounting portion 43 of the cylinder 36 is pivotably passed. Further, a slider insertion groove 53 is provided so as to be positioned at the lower part in the assembled state to the lock member disposing portion 11.

  In the present embodiment, the partition plate 49 located in the key insertion direction ahead of the cylinder 36 is positioned at a position corresponding to the projection 48 with the cylinder 36 rotated to the ACC position 23b. A recess 54 that constitutes a push-in restricting portion of the cylinder 36 is provided so as to be recessed along the key insertion direction. The concave portion 54 is a dent slightly larger than the convex portion 48, and when the cylinder 36 is located at a position other than the ACC position 23b, the convex portion 48 does not coincide with the concave portion 54 and abuts against the surface around the concave portion 54. The pushing operation of the cylinder 36 is made impossible. When the cylinder 36 is rotated to the ACC position 23b, the convex portion 48 coincides with the concave portion 54, thereby enabling the cylinder 36 to be pushed in the key insertion direction. Further, in this pushed-in state, the convex portion 48 is fitted in the concave portion 54 so that the cylinder 36 cannot be rotated.

  Further, a lock link 55 is swingably disposed in the lock link disposition portion 19 of the lock member disposition portion 11 so as to correspond to the key detection member 42. When the key is inserted into the key hole 37 of the cylinder 36, the lock link 55 is pressed and swung by the key detection member 42, so that the lock bolt 64 in the retracted (unlocked) state is passed through the slider 66. It is locked so that it cannot enter. Specifically, the lock link 55 includes an abutment portion 56 positioned on the rotation trajectory of the key detection member 42 and a locking claw portion 57 positioned at an end opposite to the contact portion 56. I have. In the vicinity of the abutting portion 56, an unlocking spring 58 is disposed as an urging means for releasing the locking of the lock bolt 64 when the key detection member 42 is not in contact.

  When the cam member 59 is mounted on the cam mounting portion 43 of the cylinder 36, the cam member 59 is integrally rotated with the cylinder 36 in the range from the LOCK position 23a to the START position 23d. The cam portion 62 and the interlocking operation portion 63 are provided.

  The mounting portion 60 is disposed so as to be rotatable with respect to the protruding plate portion 13 of the housing 10 and to be movable in the axial direction along the key insertion direction. Further, on the cylinder lock 20 side, a cam mounting portion 43 penetrating the partition plate 49 is fitted so as to be movable along the axial direction and not rotatable in the circumferential direction, and interlocked with the rotation of the cylinder 36. And turnable. A cylinder biasing spring 61 that biases the cam mounting portion 43 of the cylinder 36 in the direction opposite to the key insertion direction is disposed inside the mounting portion 60. Accordingly, the cylinder 36 pushed in the key insertion direction is returned to the non-pushing position by the urging force of the cylinder urging spring 61. The cylinder biasing spring 61 has a biasing force larger than the biasing force of the advance biasing spring 34 of the stopper member 32.

  The cam portion 62 is provided so as to be positioned below the lock member disposing portion 11 when mounted on the housing 10. The cam portion 62 has the lock bolt 64 in the advanced state on the end surface located on the opposite side of the advance direction of the lock bolt 64 along the axial direction of the cam member 59, that is, on the cylinder lock 20 side via the slider 66. A cam surface for retreating from the LOCK position 23a to the ACC position 23b is provided.

  The interlocking operating portion 63 is provided on the opposite side to the cam portion 62 so as to be positioned in the connecting space portion 15 at the tip of the protruding plate portion 13 in the mounted state on the housing 10. The interlocking operating portion 63 is provided with a bevel gear portion on the outer peripheral edge of the front end surface.

  As shown in FIG. 1, the lock bolt 64 is disposed so as to be movable along the axial direction of the cam member 59, and is attached to the insertion hole 16 of the housing 10 so as to advance and retract. In this embodiment, a slider connecting portion 65 protruding in a substantially L shape is provided at the rear end portion of the lock bolt 64, and the slider connecting portion 65 is provided separately for interlocking with the rotation of the cam member 59. The slider 66 is provided.

  The slider 66 is mounted so as to be slidable in the axial direction from the insertion hole side to the cylinder lock 20 through the partition plate 49 in the lock member disposition portion 11. An L-shaped connecting portion 67 connected to the slider connecting portion 65 of the lock bolt 64 is provided at the front end portion of the slider 66. In addition, a sliding portion 68 that is in sliding contact with the cam portion 62 of the cam member 59 is provided at the rear end portion of the slider 66. The sliding is interlocked with the rotation of the cam member 59, and the lock bolt 64 is engaged with the steering shaft through the slider 66 to prevent the steering shaft from rotating. It is configured to move to an unlock position where the engagement with the shaft is released and the steering shaft is allowed to rotate. Further, the slider 66 is provided with a lock portion 69 protruding from the sliding portion 68 toward the lock link 55 side. As shown in FIG. 2, the lock portion 69 is configured to engage with the locking claw portion 57 of the lock link 55 at the unlock position where the lock bolt 64 is completely retracted into the insertion hole 16. In this embodiment, the slider 66 is provided with a slider urging spring 70 on the lock link 55 side, and the slider urging spring 70 urges the lock bolt 64 in the advancing direction via the slider 66. It is configured to do.

  The ignition switch 71 is detection means for detecting the rotational position of the cylinder 36, and is disposed at the opening end of the switch member disposition portion 12 through the ignition lid 72 in the housing. The ignition switch 71 detects the rotation of the cylinder 36 via the cam member 59 and the interlocking member 73, and stops the engine and all devices at the LOCK position 23a according to the rotation position, and stops the engine at the ACC position 23b. While stopping, only some load components such as audio are operated, all load components can be operated at the ON position 23c, and when the engine is driven, the driving state is maintained, and at the START position 23d The electric circuit is switched to start the engine. A return spring (not shown) as an urging means is disposed inside the ignition switch 71. The urging force of the return spring moves the interlocking member 73, the cam member 59, and the cylinder 36 from the START position 23d to the ON position. Return to 23c.

  The interlocking member 73 transmits the rotational position of the cylinder 36 to the ignition switch 71 by being rotated in conjunction with the rotation of the cam member 59. Further, the urging force to be returned by the return spring of the ignition switch 71 is transmitted to the cylinder 36 via the cam member 59. Specifically, the interlocking member 73 is provided with a connecting shaft 74 that penetrates the ignition lid 72 and is connected to the ignition switch 71 at the upper end thereof. Further, a shaft portion 75 that is rotatably supported by the bearing portion 14 of the housing 10 is projected from the lower end of the interlocking member 73. On the upper side of the shaft portion 75, a bevel gear portion that protrudes radially outward so as to form a disk shape and is located in the coupling space portion 15 and meshes with the interlocking operation portion 63 (brass gear portion) of the cam member 59. 76 is provided.

  Next, the operation of the locking device having the above configuration will be described.

  First, when the cylinder 36 is at the LOCK position 23a and no key is inserted into the key hole 37, the locking device is in the locked state shown in FIG. In the locked state of the steering shaft, the lock bolt 64 advances by the urging force of the slider urging spring 70 via the slider 66, and the protruding portion from the insertion hole 16 of the housing 10 engages with the engaging recess of the steering shaft. ing.

  In this locked state, when the driver inserts a regular key into the key hole 37, the key detection member 42 rotates outward in the radial direction of the cylinder 36, so that the lock link 55 is urged by the latch release spring 58. Rocks against it. In addition, the tumbler is immersed in the cylinder 36, and the cylinder 36 becomes rotatable with respect to the holder 21. In this state, when the cylinder 36 is rotated clockwise by rotating the key, the cam member 59 integrally rotates clockwise.

  First, when the cylinder 36 is rotated clockwise from the LOCK position 23a to the START position 23d, the inclined surface 45 of the locking portion 44 is a holder in the stopper member 32 as shown in FIGS. 21 abuts on a portion protruding from the accommodating portion 27. Then, according to the inclination of the inclined surface 45, the stopper member 32 moves backward against the urging force of the advance urging spring 34. Thereafter, as shown in FIG. 7C, when the key rotation operation by the driver exceeds the ACC position 23b, the locking portion 44 exceeds the stopper member 32, so that the stopper member 32 is moved forward. It advances along the key insertion direction by the urging force of 34. The advancement of the stopper member 32 stops in a state where the tip is in contact with the step portion 18 of the housing 10.

  Further, when the cam member 59 is rotated in conjunction with the rotation of the cylinder 36, the sliding portion 68 of the slider 66 is brought into sliding contact with the cam portion 62, so that the slider 66 is moved to the cam portion 62 as shown in FIG. It is moved to the rear end face side. As a result, the lock bolt 64 is moved backward in an integrated manner, thereby being retracted into the housing 10. When the key is rotated to the ACC position 23 b, the lock portion 69 of the slider 66 is engaged with the engagement claw portion 57 of the lock link 55, and the unlocked state is maintained until the key is removed from the key hole 37.

  Further, when the cam member 59 is rotated by the rotation of the cylinder 36, the interlocking member 73 is rotated. The ignition switch 71 detects the ACC position 23b, the ON position 23c, and the START position 23d of the cylinder 36 by the key in turn by the rotation of the interlocking member 73, and outputs it to the main microcomputer of the automobile.

  When the driver rotates the key to the START position 23d and the driver releases his / her hand from the key, the contraction restriction of the return spring built in the ignition switch 71 is released. Therefore, the interlocking member 73 is rotated in the reverse direction by the urging force of the return spring, the cam member is rotated in conjunction with it, and the cylinder 36 is integrally rotated counterclockwise to automatically return to the ON position 23c. Let

  On the other hand, when the driver turns the cylinder 36 counterclockwise from the ON position 23c toward the LOCK position 23a via the key in order to stop the engine, the cam member 59 and the interlocking member 73 are interlocked with each other. While rotating in the opposite direction, the lock bolt 64 and the slider 66 maintain their positions without moving forward.

  Specifically, when the driver rotates the key to the ACC position 23b, the cylinder 36 has the locking surface 46 of the locking portion 44 of the holder 21 in the stopper member 32 as shown in FIG. It abuts on a portion protruding from the accommodating portion 27. At this time, in the present embodiment, since the side surface 27a on the LOCK position 23a side of the accommodating portion 27 is provided so as to expand toward the front in the LOCK rotation direction, when the locking portion 44 presses the stopper member 32, the stopper The member 32 swings against the biasing force of the swinging biasing spring 35 until the member 32 comes into contact with the side surface 27a. Further, when the stopper member 32 comes into contact with the side surface 27a, further turning operation toward the LOCK position 23a of the cylinder 36 by the key operation is prevented.

  When the cylinder 36 is rotated to the rotation prevention position where the stopper member 32 swings in this way, the convex portion 48 of the cylinder 36 coincides with the concave portion 54 of the partition plate 49. As a result, as shown in FIG. 7E, when the driver presses the key, the cylinder 36 can be pushed in the key insertion direction against the urging force of the cylinder urging spring 61. Become. That is, the cylinder 36 is not completely rotated to the ACC position 23b when the locking portion 44 of the cylinder 36 is only in contact with the stopper member 32. Therefore, the convex portion 48 and the concave portion 54 do not coincide with the key insertion direction, and the cylinder 36 is maintained in a state where it cannot be pushed. When the stopper member 32 is swung by the rotation of the cylinder 36 toward the LOCK position 23a by the key operation, the convex portion 48 and the concave portion 54 coincide with the key insertion direction, and the cylinder 36 is rotated. The movement is blocked and the push-in is enabled.

  Then, when the cylinder 36 is pushed into the housing 10 as shown, the convex portion 48 engages with the concave portion 54. Thereby, the cylinder 36 is in a state in which neither the LOCK rotation toward the LOCK position 23a nor the START rotation toward the START position 23d is possible. Further, the locking portion 44 of the cylinder 36 exceeds the tip of the stopper member 32 that is prevented from advancing by the step portion 18. As a result, the pressing of the stopper member 32 by the locking portion 44 is released, and the stopper member 32 returns to the urging position where it is not oscillated by the urging force of the oscillating urging spring 35. As a result, the contact end surface 47 of the locking portion 44 is located at the tip of the stopper member 32.

  When the pushing operation of the cylinder 36 via the key is stopped in this state, the cylinder 36 is returned to the rotatable position before pushing by the urging force of the cylinder urging spring 61 as shown in FIG. At this time, the stopper member 32 is retracted against the urging force of the advance urging spring 34 by abutting against the abutting end surface 47. This makes it possible to further rotate the cylinder 36 toward the LOCK position 23a without re-engaging the locking portion 44 and the stopper member 32.

  When the cylinder 36 is rotated to the LOCK position 23a in this way, the cam member 59 and the interlocking member 73 are interlocked. At this time, since the lock bolt 64 is engaged with the lock link 55 via the slider 66, the lock bolt 64 holds the unlock position without moving forward. On the other hand, the ignition switch 71 that has detected the rotational position of the cylinder 36 via the interlocking member 73 outputs the information to the main microcomputer of the automobile.

  Then, when the driver pulls out the key from the key hole 37, as shown in FIG. 1, the pressing of the key detection member 42 by the key is released, so that the lock link 55 is rotated by the urging force of the locking release spring 58. Move. As a result, when the engagement between the lock link 55 and the slider 66 is released, the lock bolt 64 advances together with the slider 66 by the urging force of the slider urging spring 70 and engages with the engagement recess of the steering shaft. To do. When the lock bolt 64 and the engaging recess of the steering shaft do not coincide with the circumferential direction, the tip of the lock bolt 64 abuts on the outer peripheral surface of the steering shaft and cannot engage. In this case, the lock bolt 64 is in a slightly advanced state, and when they coincide with the turning of the steering wheel, the lock bolt 64 is advanced by the urging force of the lock bolt urging spring to lock the steering.

  Thus, when performing the LOCK rotation operation, the lock device of the present invention cannot be rotated at a predetermined position by the locking portion 44 and the stopper member 32 constituting the rotation prevention portion. The cylinder 36 allows the pushing operation along the key insertion direction only at the blocking position by the convex portion 48 and the concave portion 54 constituting the pushing restricting portion, and in this pushed state, the cylinder 36 cannot be rotated. It is possible. For this reason, the key turning operation by the driver is surely temporarily stopped at the blocking position. Further, when the cylinder 36 is pushed in, the blocking state by the locking portion 44 and the stopper member 32 is released by the accommodating portion 27 and the swinging biasing spring 35 constituting the blocking state releasing portion. When the pushing operation is stopped, the key can be turned again, and the cylinder 36 can be turned to the LOCK position 23a.

  That is, during the LOCK rotation, the key rotation operation is reliably interrupted at the predetermined ACC position 23b, and the key rotation operation is resumed unless the pushing operation and the pushing back operation by stopping the pushing operation are performed. I can't. Since such an operation cannot be performed unless the driver consciously performs it, the steering lock due to an erroneous operation can be surely prevented. The blocking state releasing portion is provided with a receiving portion 27 for holding the stopper member 32 in a swingable manner in the holder 21, and the stopper member 32 is biased from the LOCK position 23a side to the START position 23d side by the swinging biasing spring 35. Since this is a simple configuration, it can be surely realized and there is no risk of malfunction.

  The steering lock device of the present invention is not limited to the configuration of the above embodiment, and various modifications can be made.

  For example, in the above-described embodiment, the holder 21 is provided as a component of the cylinder lock 20, and the accommodating portion 27 of the stopper member 32 is provided on the holder 21. 10 and the holder 21 may not be provided. Furthermore, in the above-described embodiment, the separate slider 66 is disposed on the lock bolt 64, but the configuration of the slider 66 may be integrally provided on the lock bolt 64.

It is sectional drawing which shows the steering lock apparatus of embodiment which concerns on this invention. It is sectional drawing which shows the unlocked state of the steering lock apparatus of FIG. The structure of a holder is shown, (A) is the top view which fractured | ruptured one part, (B) is a left view, (C) is a right view. A stopper member is shown, (A) is a front view, (B) is a right side view. A cylinder is shown, (A) is a front view, (B) is a rear view, (C) is a left side view, and (D) is a right side view. It is a side view which shows a division plate. (A), (B), (C) is a schematic view showing a state in which the cylinder is rotated by START, and (D), (E), (F) are schematic views showing a state in which the cylinder is rotated by LOCK.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Housing 20 ... Cylinder lock 21 ... Holder 23a ... LOCK position 23b ... ACC position 23c ... ON position 23d ... START position 27 ... Storage part 27a ... Side surface 32 ... Stopper member 34 ... Advance biasing spring (biasing means)
35 ... Swing urging spring (urging member)
36 ... Cylinder 44 ... Locking portion 45 ... Inclined surface 46 ... Locking surface 47 ... Abutting end surface 48 ... Convex portion 49 ... Partition plate 54 ... Concavity 59 ... Cam member 63 ... Interlocking operating portion 64 ... Lock bolt 66 ... Slider 71 ... Ignition switch 73 ... Interlocking member

Claims (3)

A cylinder which is disposed in the housing so as to be movable along the key insertion direction, is urged in the opposite direction to the key insertion direction, and is rotatable from the LOCK position to the START position through the ON position;
In conjunction with the rotation of the cylinder, a lock bolt that moves to a lock position that can be engaged with the steering shaft at the LOCK position, and moves to an unlock position where the engagement with the steering shaft is released at another position;
A rotation blocking unit for blocking rotation of the cylinder at a predetermined position when the LOCK is rotated from the ON position of the cylinder toward the LOCK position;
A push-in restricting portion that allows a push-in operation along the key insertion direction of the cylinder only at the blocking position, and makes the rotation of the cylinder in the pushed-in state impossible;
A blocking state release unit that releases the rotation blocking state by the rotation blocking unit by the pushing operation;
In the steering lock device with
The rotation preventing portion includes a stopper member disposed in the housing so as to be urged along the key insertion direction, and a latch provided on the cylinder so as to be positioned at a tip of the urging direction of the stopper member. A stop, and
The blocking state release portion is provided in a holder that rotatably accommodates the housing or the cylinder, accommodates the stopper member so as to advance and retreat, and is substantially tangential to the rotation direction of the cylinder. And a biasing member that biases the stopper member from the LOCK position side to the START position side in the accommodation section.
Steering lock device characterized in that. The locking portion has an inclined surface that retracts the stopper member against an urging force when the START is rotated from the LOCK position toward the START position, and a locking surface that contacts the stopper member when the LOCK is rotated. The steering lock device according to claim 1 , wherein the steering lock device is one. The indentation restricting portion is
A protrusion provided to protrude in the key insertion direction with respect to the cylinder;
A recess provided in a member located in the key insertion direction ahead of the cylinder, and capable of fitting the protrusion by the pressing operation;
The steering lock device according to claim 1, further comprising:

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