JP4912262B2 - 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. Then, when the driver inserts a mechanical key having a mechanical structure into the key hole and rotates the LOCK position to the START position to start the engine, the lock bolt that can be moved back and forth moves backward, and the steering shaft is driven by the lock bolt. The lock on is released. Conversely, when the mechanical key is rotated from the ON position to the LOCK position in order to stop the engine, the lock bolt advances and engages with the steering shaft to be locked.

  In recent years, keyless entry systems that can open and close doors and start engines without using structural mechanical keys have become widespread. The steering lock device applied to a vehicle equipped with such a keyless entry system can rotate the operation unit instead of the mechanical key in the authorized electronic key authentication state, and keep the operation unit non-rotatable in the non-authenticated state. There is a need.

  Prior art document information related to a steering lock device applied to a vehicle equipped with such a keyless entry system includes the following.

Japanese Patent Laid-Open No. 05-105031

  In this patent document, a locking member that is detachably locked is disposed on a cylinder that is rotated by operation of an operation unit, and the locking member is configured to be movable by a solenoid disposed outside the housing. Yes. In the electronic key authentication state, the cylinder is unlocked by the locking member via the solenoid, and the cylinder can be rotated by operating the operation unit. On the other hand, in the non-authenticated state of the electronic key, the cylinder is locked by a locking member via a solenoid, and the cylinder cannot be rotated by the operation unit.

  However, in the steering lock device of this patent document, when the solenoid is removed by breaking (disassembling) the housing, the exposed locking member can be easily operated. When the lock of the cylinder is released by operating the locking member, the lock by the lock bolt can be easily released by operating the operation portion, and the engine can be started.

  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 unauthorized unlocking by breaking or disassembling a housing.

  In order to solve the above-described problem, a steering lock device according to the present invention includes a rotor that is rotatably housed in a housing and has an operation unit that is exposed to the outside of the housing, and a rotation prevention unit that rotates integrally with the rotor. Rotating the steering shaft by releasing the engagement with the steering shaft from a lock position that interlocks with the rotation of the cam member provided and engages with the steering shaft to prevent the rotation of the steering shaft. A lock bolt movable to an unlocked position enabling engagement, an engagement member that removably engages with an engagement receiving portion provided on the rotor, and prevents rotation of the rotor in the engaged state; An actuator that moves the engagement member from an engagement position engaged with the engagement receiving portion of the rotor to a non-engagement position where the engagement with the rotor is released. The engagement with the rotation preventing portion is released from a blocking position that is biased by the biasing means toward the cam member and engages with the rotation preventing portion of the cam member to prevent the rotation of the cam member. A blocking member that is movable toward the non-blocking position, and the actuator is provided with a holding portion that engages the blocking member when mounted on the housing and holds the blocking member in the non-blocking position. Yes.

  According to this steering lock device, when the actuator located outside the housing is removed due to destruction or disassembly, the engagement between the holding portion and the blocking member is released. As a result, the blocking member is biased toward the cam member by the biasing force of the biasing means, and moves to the blocking position where it engages with the rotation blocking portion. As a result, the cam member cannot be operated in the unlocking direction, so that the steering lock device can be prevented from being unlocked illegally.

  Specifically, the housing has a lock member disposing portion that rotatably disposes the rotor, and a communication hole that communicates with the lock member disposing portion, and the actuator and the engaging member are disposed therein. Provided with an arrangement portion, and the engagement member is projected into the lock member arrangement portion through the communication hole and engaged with the engagement receiving portion of the rotor.

  In this steering lock device, the blocking member closes the communication hole by advancing to the blocking position, and a notch for preventing interference with the engaging member at the engagement position is provided at the leading end in the advancing direction. It is preferable to provide it. In this way, since the movable range of the engaging member can be secured, these engagement margins can be sufficiently widened. As a result, since the engagement strength can be improved, unauthorized unlocking caused by applying a large rotational force to the operation unit can be reliably prevented.

  Further, it is preferable that the holding portion protrudes into the lock member disposition portion through the communication hole and is engaged with the blocking member. If it does in this way, if a blocking member moves to the blocking position of a cam member, the communicating hole for making an engagement member penetrate by this blocking member can be obstruct | occluded. Therefore, it is possible to configure a steering lock device that cannot be reliably unlocked with a simple configuration.

  Further, it is preferable that a holder for rotatably accommodating the rotor is disposed in the lock member disposition portion of the housing, and the blocking member is disposed on the outer peripheral portion of the holder so as to be movable by a biasing means. If it does in this way, a blocking member can be arranged simply and reliably.

  In the steering lock device of the present invention, even if the actuator is removed by breaking or disassembling the housing, the blocking member moves to the blocking position where the cam member cannot be operated, so that unauthorized unlocking can be reliably prevented.

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

  FIG. 1 shows a steering lock device (hereinafter abbreviated as “lock device”) according to an embodiment of the present invention. This locking device is used for an automobile equipped with a keyless entry system. In general, the cylinder lock 20, the cam member 37, and the lock bolt 48 are disposed inside the housing 10, and the ignition switch 53 is arranged. In addition, an interlocking member 55 for transmitting the rotation of the cylinder lock 20 is provided, and an authentication lock mechanism for changing whether or not the cylinder lock 20 can be operated based on the authentication state of the electronic key is further provided.

  As shown in FIG. 2, the housing 10 has a hollow shape having an L 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. A projecting plate portion 13 extending in the horizontal direction is provided at the intersection of the arrangement portions 11 and 12. The projecting plate portion 13 is provided with a bearing portion 14 so as to be positioned at the axial center of the switch member disposing portion 12. Further, a connecting space portion 15 for connecting a cam member 37 (described later) and the interlocking member 55 is provided between the protruding plate portion 13 and the inner peripheral surface of the switch member disposing portion 12. An insertion hole 16 is provided at a corner portion of the housing 10 so as to penetrate along the extending direction of the lock member disposing portion 11 and to allow the lock bolt 48 to be advanced and retracted. 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 housing 10 of the present embodiment, an actuator placement portion 17 is further provided at the inner corner where the placement portions 11 and 12 intersect. The actuator disposition portion 17 is provided with a communication hole 18 located between a cylinder lock 20 and a cam member 37, which will be described later, so as to communicate with the lock member disposition portion 11. The communication hole 18 is provided so as to extend from the vicinity of the insertion end of the rotor 24 constituting the cylinder lock 20 to the vicinity of the outer peripheral wall of the switch member disposition portion 12. In addition, the actuator arrangement portion 17 is configured to position and close the actuator 66 arranged inside by a separate actuator cover 19.

  As shown in FIGS. 1 and 3, the cylinder lock 20 includes a cylindrical holder 21 that is attached to one end of the lock member disposing portion 11, a rotor 24 that is rotatably disposed inside the holder 21, and A cylinder 30 that is rotatably arranged in the rotor 24 and a plurality of tumblers 36 that are arranged in the cylinder 30 are provided.

  The holder 21 has a substantially cylindrical shape that is attached to the opening end of the lock member disposing portion 11 of the housing 10 in a non-rotatable state, and a rotor 24 is rotatably disposed therein. The holder 21 is provided with a blocking member disposing portion 22 so as to be positioned on the upper top portion in the mounted state. The blocking member disposing portion 22 is provided so as to extend rearward along the axial direction from the front end in the mounting direction of the holder 21 and to be recessed in the radial direction, and penetrates the front end through the inner space. An engaging member insertion portion 23 is provided.

  The rotor 24 is rotatably accommodated in the housing 10 via the holder 21 by being disposed in the holder 21 so as to be rotatable about an axis. A locking groove 25 for inserting and locking the tumbler 36 protruding radially outward from the cylinder 30 is provided on the inner peripheral surface of the rotor 24. The rotor 24 has a cylindrical shape substantially the same as the dimension from the end surface on the outside of the housing 10 in the holder 21 to the rear end in the mounting direction of the engaging member insertion portion 23, and has a substantially semi-cylindrical shape on the tip surface. A closed portion 26 that extends in the attached state and extends toward the cam member 37 in a mounted state protrudes along the axial direction. Further, an engaging member 59 described later is detachably engaged with the tip of the rotor 24 so as to be positioned on the closing portion 26 and in the vicinity of the top in the mounted state and the non-operating (LOCK) state. An engagement receiving portion 27 is provided. This engagement receiving portion 27 is provided with a convex portion 28 that protrudes from the closing portion 26 so as to have substantially the same diameter as the outer diameter of the main body of the rotor 24, and is cut out from the front end of the convex portion 28 in the mounting direction It consists of a concave groove. A cam surface 29 for moving the engagement member 59 at the engagement position to the non-engagement position is provided on the side of the convex portion 28 that is positioned forward in the rotational direction when operated from the ON position to the LOCK position. Yes.

  The cylinder 30 includes a key hole extending along the rotation axis and a plurality of tumbler insertion holes arranged in parallel so as to extend in a direction orthogonal to the rotation axis. The cylinder 30 is formed to have a dimension that protrudes to the outside from the housing 10 in the mounted state, and a separate operation member 31 is disposed on the exposed portion to the outside. That is, in the present embodiment, the operation member 31 constituting the operation unit is provided on the rotor 24 via the cylinder 30. The operation member 31 is provided with a key insertion hole 32 communicating with the key hole. The cylinder 30 has a cam mounting portion 33 projecting from the end opposite to the operation member 31. Further, the cylinder 30 is provided with a flange portion 34 projecting outward so as to be positioned in the vicinity of the operation member 31, and a separate cover 35 is inserted so as to cover the flange portion 34. 10 is mounted so that it can rotate and cannot be detached. The cover 35 is marked with a notation at a predetermined clockwise position in the order of the LOCK position, the ACC position, the ON position, and the START position.

  The tumbler 36 is disposed in a tumbler insertion hole together with a spring (not shown), and a through hole (not shown) through which a mechanical key made of a mechanical structure passes is provided at the center. When the mechanical key is inserted into the key hole of the cylinder 30, the key pile presses the edge of the through hole of the tumbler 36, and each tumbler 36 moves back into the cylinder 30 against the urging force of the spring, whereby the rotor 24 The locking with the locking groove 25 is released. As a result, the cylinder 30 can rotate with respect to the rotor 24 and can be rotated in the range from the LOCK position to the START position by rotating the mechanical key.

  When the cam member 37 is mounted on the cam mounting portion 33 of the cylinder 30, the cam member 37 is rotated integrally with the rotor 24 through the cylinder 30 and the cylinder 30 in the range from the LOCK position to the START position. . The cam member 37 generally includes a mounting portion 38, a cam portion 43, and an interlocking operation portion 45.

  The mounting portion 38 is mounted on the cam mounting portion 33 so as to be non-rotatable with respect to the cylinder 30, and the outer peripheral portion 38 a located on the cylinder lock 20 side is closed by the rotor 24. Part 26 is located. The mounting portion 38 is provided with a mounting hole 40 for positioning the cam mounting portion 33 of the cylinder 30 by inserting and positioning the cam mounting portion 33 of the cylinder 30. The mounting portion 38 is closed on the side opposite to the cylinder lock 20, and a positioning portion 42 for positioning the lock bolt urging spring 41 is provided at that portion.

  The cam portion 43 is provided so as to be positioned below the lock member disposing portion 11 when mounted on the housing 10. The cam portion 43 is provided with the lock bolt 48 in the advanced state on the end surface located on the opposite side to the advance direction of the lock bolt 48 along the rotational axis direction of the cam member 37, that is, on the end surface located on the cylinder lock 20 side. A cam surface 44 is provided to be retracted via the slider 50. The cam surface 44 is configured to retract the lock bolt 48 between the LOCK position and the ACC position and maintain the position of the retracted lock bolt 48 between the ACC position and the START position.

  The interlocking operating portion 45 is provided so as to be positioned on the opposite side in the radial direction with respect to the cam portion 43 so as to be positioned in the connecting space portion 15 at the tip of the projecting plate portion 13 in the mounting state on the housing 10. It is a thing. The interlocking operating portion 45 is provided with a bevel gear portion 46 on the outer peripheral edge of the front end surface. In the present embodiment, the interlocking operating portion 45 is provided with a rotation preventing portion 47 that protrudes along the axial direction toward the rotor 24 on the surface facing the rotor 24. Here, as shown in FIGS. 3 and 7, the cam member 37 rotates clockwise when unlocked and rotates counterclockwise when locked. The rotation preventing portion 47 is provided in the interlocking operating portion 45 at a position deviated from the top toward the lock rotation side, and is configured to contact a side surface of a blocking member 73 described later.

  As shown in FIG. 1, the lock bolt 48 is disposed so as to be movable along the axial direction of the cam member 37, 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 49 protruding in a substantially L shape is provided at the rear end portion of the lock bolt 48, and a separate member for interlocking with the rotation of the cam member 37 is provided on the slider connecting portion 49. The slider 50 is arranged.

  The slider 50 is slidably mounted along the rotation axis direction of the cam member 37 on the inner peripheral surface of the lock member disposition portion 11. A bent connecting portion 51 connected to the slider connecting portion 49 of the lock bolt 48 is provided at the front end portion of the slider 50. A sliding portion 52 that is bent toward the rotation axis of the cam portion 43 is provided at the rear end portion of the slider 50 so as to be in sliding contact with the cam surface 44 of the cam portion 43. By sliding between the sliding portion 52 and the cam surface 44, the lock bolt 48 is interlocked with the rotation of the cam member 37 via the slider 50 and engaged with the steering shaft to prevent the steering shaft from rotating. It is configured to move from the locked position to the unlocked position where the engagement with the steering shaft is released and the steering shaft can be rotated.

  The ignition switch 53 is disposed at the opening end of the switch member disposition portion 12 in the housing 10 via an ignition lid 54. The ignition switch 53 detects the rotational position of the cylinder 30 via the cylinder 30 and the rotor 24 via the cam member 37 and the interlocking member 55, so that the engine and all the devices in the LOCK position according to the detection (rotation) position. In the ACC position, the engine is stopped and only some load components such as audio are operated. In the ON position, all the load components can be operated and the engine is driven. The electric circuit is switched so that the engine is started at the START position. Inside the ignition switch 53, a return spring (not shown) as an urging means is disposed, and the urging force of the return spring moves the interlocking member 55, the cam member 37, the cylinder 30 and the rotor 24 from the START position. Return to the ON position.

  The interlocking member 55 transmits the rotational positions of the cylinder 30 and the rotor 24 to the ignition switch 53 by rotating in conjunction with the rotation of the cam member 37. Further, the urging force to be returned by the return spring of the ignition switch 53 is transmitted to the cylinder 30 and the rotor 24 via the cam member 37. Specifically, the interlocking member 55 is provided with a connecting shaft 56 that penetrates the ignition lid 54 and is connected to the ignition switch 53 at the upper end thereof. A shaft portion 57 that is rotatably supported by the bearing portion 14 of the housing 10 is projected from the lower end of the interlocking member 55. On the upper side of the shaft portion 57, a similar bevel gear portion 58 that protrudes radially outward so as to form a disc shape and is located in the coupling space portion 15 and meshes with the bevel gear portion 46 of the cam member 37 is provided. ing.

  The authentication lock mechanism carries an electronic key with a built-in IC tag instead of a mechanical key so that the operation member 31 can be operated without using the mechanical key in the authentication state, and the operation member 31 cannot be operated in the non-authentication state. It is possible. This authentication lock mechanism generally includes an engaging member 59 that is detachably engaged with the rotor 24, an actuator 66 that operates the engaging member 59, and an operation member 31 that is not operated when the actuator 66 is detached. And a blocking member 73 that can be used.

  As shown in FIGS. 1 and 3, the engagement member 59 is engaged with the engagement receiving portion 27 of the rotor 24 so as to be detachable, thereby preventing the rotation of the rotor 24 in the engaged state. is there. The engagement member 59 is swingably disposed on the actuator 66, and is integrally disposed on the actuator disposition portion 17 of the housing 10 while being attached to the actuator 66. Specifically, the engagement member 59 includes a pair of arm portions 60 and 60 for swingably attaching to the actuator 66, and an engagement portion that connects the lower ends of the arm portions 60 and 60 and projects downward. 62 and a substantially Y-shape. At the upper end of the arm portion 60, there is provided a shaft mounting portion 61 having a substantially disc shape and having a through hole 61 a through which the connecting pin 77 passes at the center. The engaging portion 62 is guided by the side wall of the blocking member disposing portion 22 of the holder 21, penetrates the engaging member insertion portion 23, and engages with the engaging receiving portion 27 of the rotor 24. In order to improve, the thickness along the swing direction is formed thick.

  The engaging member 59 of this embodiment is provided with a rubber cushioning member 63 in an internal space surrounded by the arm portions 60 and 60 and the engaging portion 62 for connection with the actuator 66. The buffer member 63 includes an insertion groove 64 through which the rod 68 of the actuator 66 is inserted, and a buffer protrusion 65 that absorbs an impact caused by contact with the actuator 66.

  The actuator 66 moves the engagement member 59 from the engagement position engaged with the engagement receiving portion 27 of the rotor 24 to the non-engagement position where the engagement with the rotor 24 is released. And a frame body 70 that accommodates the solenoid 67. The solenoid 67 advances the rod 68 by energization, while the rod 68 is urged to the retracted position by non-energization (interruption). Each of the rods 68 includes a pair of engagement grooves 69 that are annularly recessed in a part thereof, and is inserted into the insertion groove 64 of the buffer member 63 so as to be positioned between the engagement grooves 69. 2), the engaging member 59 can be swung by the forward and backward movement of the rod 68. The frame body 70 is a rectangular metal frame that covers the upper and lower sides of the solenoid 67 and the front and rear of the rod 68 in the advancing direction. The front frame 70a corresponding to the rod 68 has a through-hole through which the rod 68 protrudes forward and backward. Is provided. The front frame 70a is provided with a receiving portion 71 for pivotally mounting the engaging member 59 on the upper portion thereof. The receiving portion 71 has a substantially disk shape, and has a through hole 71a through which the connecting pin 77 passes in the center. The frame 70 is configured such that the front frame 70a is positioned at the edge of the communication hole 18 when the housing 10 is attached to the actuator arrangement portion 17, and the front frame 70a is locked through the communication hole 18. A holding portion 72 that protrudes into the member disposing portion 11 and engages with the blocking member 73 to be held at the non-blocking position is provided.

  The blocking member 73 is disposed so as to be biased toward the cam member 37 by being disposed in the blocking member disposing portion 22 of the holder 21 together with a blocking member biasing spring 74 that is a biasing means. Is. The blocking member 73 has a concave shape in plan view provided with a spring disposing portion 75 formed of a concave groove having an open rear end located on the opposite side to the advancing direction. When the blocking member 73 is disposed in the lock member disposing portion 11 together with the holder 21, the holding portion that protrudes through the communication hole 18 at the tip surface of the actuator 66 is disposed in the actuator disposing portion 17. 72 is engaged and held in the non-blocking position retracted against the biasing force of the blocking member biasing spring 74. When the actuator 66 is removed, the holding by the holding portion 72 is released, and the actuator 66 advances toward the cam member 37 by the biasing force of the blocking member biasing spring 74. As a result, the rotation preventing portion 47 of the cam member 37 engages in the unlocking direction and moves to the blocking position where the cam member 37 is prevented from rotating in the unlocking direction. At this blocking position, the communication hole 18 that communicates the lock member disposition portion 11 and the actuator disposition portion 17 is closed. In the present embodiment, the engagement member 73 is in the non-blocking position at the front end in the advance direction, and the engagement member 59 is engaged with the engagement receiving portion 27 of the rotor 24. A cutout 76 is provided to prevent interference with the combined member 59. And the holding | maintenance part 72 is set as the structure latched by the front end surface located in the both sides of this notch part 76. FIG.

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

  First, when the driver uses the mechanical key to start the engine, the regular mechanical key is inserted into the cylinder lock 20. Then, the tumbler 36 is immersed in the cylinder 30 and the cylinder 30 can rotate with respect to the rotor 24. When the driver rotates the mechanical key to the ACC position side, the cam member 37 rotates in conjunction with the rotation of the cylinder 30, and the lock bolt 48 is retracted via the slider 50. Thereby, the engagement between the lock bolt 48 and the steering shaft is released, and the steering is brought into an unlocked state in which the steering operation can be performed. Further, the rotation position of the cylinder 30 is transmitted to the ignition switch 53 through the interlocking member 55 by the rotation of the cam member, and a main microcomputer (ECU) mounted on the automobile executes predetermined control corresponding to the rotation position.

  When the driver rotates the mechanical key to the LOCK position, the slider 50 is positioned between the cam portion 43 of the cam member 37 and the interlocking operation portion 45, so that the lock bolt 48 is engaged with the lock bolt biasing spring 41. Advances from the housing 10 by the biasing force. As a result, the lock bolt 48 is engaged with the engaging recess of the steering shaft, and the steering is locked. In this state, when the engagement recess of the steering shaft is not located at the front end of the lock bolt 48 in the advance direction, the front end of the lock bolt 48 is in contact with the outer peripheral surface of the steering shaft. When the lock bolt 48 and the engagement recess coincide with each other due to the rotation of the steering, they are engaged by the urging force of the lock bolt urging spring 41. Further, the main microcomputer detects the LOCK position via the interlocking member 55 and executes control according to the LOCK position.

  On the other hand, when the driver carries the electronic key, the main microcomputer analyzes the code transmitted from the electronic key and analyzes whether or not the electronic key is a legitimate electronic key. And when authenticating that it is a regular electronic key, the signal which permits operation of the operation member 31 with respect to a locking device is output.

  Then, the lock device energizes the solenoid 67 and advances the rod 68. As a result, the engaging member 59 engaged with the rod 68 rotates counterclockwise in the drawing and is separated from the actuator 66 as shown in FIG. Then, the engagement between the engagement member 59 and the engagement receiving portion 27 is released, and the rotor 24 can rotate with respect to the holder 21.

  In this state, when the driver rotates the knob of the operation member 31 toward the ACC position, a force acts so that the cylinder 30 rotates relative to the rotor 24 as described above. However, in this state, since the tumbler 36 protrudes from the cylinder 30 and the tumbler 36 is locked in the locking groove 25 of the rotor 24, the cylinder 30 cannot rotate with respect to the rotor 24. As a result, the cylinder 30 acts so as to rotate with respect to the holder 21 together with the rotor 24.

  Therefore, as shown in FIG. 5, when the operation member 31 is operated, the rotor 24 engaged with the cylinder 30 via the tumbler 36 is interlocked and rotates with respect to the holder 21. As a result, as in the case where the mechanical key is used, the cam member 37 rotates in conjunction with the rotation of the cylinder 30 and the lock bolt 48 is moved backward via the slider 50. As a result, the lock bolt 48 is unlocked with respect to the steering shaft, and the rotation position is transmitted to the ignition switch 53 via the interlocking member 55, whereby the main microcomputer executes a predetermined control corresponding to the rotation position.

  The energization of the solenoid 67 is cut off when various conditions such as engine start and preset time are satisfied. Then, the solenoid 67 retracts the rod 68 by the built-in spring, and the engaging member 59 returns to the biased state before swinging with the buffer protrusion 65 abutting against the frame body 70 as shown in the figure.

  When the driver rotates the knob of the operation member 31 toward the LOCK position in this state, the rotor 24 together with the cylinder 30 rotates integrally with the holder 21 as described above. When the rotation is located in the vicinity of the LOCK position, the cam surface 29 located on the side portion of the engagement receiving portion 27 comes into contact with the engagement portion 62 of the engagement member 59. When the rotation operation of the operation member 31 is continued, the engagement portion 62 of the engagement member 59 slides on the surface of the cam surface 29 of the rotor 24, so that the engagement member 59 in the retracted position resists the urging force. Is rotated to the advance position. As a result, when the cam surface 29 exceeds the end of the engaging portion 62 of the engaging member 59, the engaging member 59 returns to the retracted position by the biasing force of the solenoid 67 and engages with the engaging receiving portion 27 of the rotor 24. Match.

  Even when the operation member 31 is operated to the LOCK position, the lock bolt 48 is positioned between the cam portion 43 of the cam member 37 and the interlocking operation portion 45 as in the case of operation using the mechanical key. As a result, the lock bolt urging spring 41 advances from the housing 10 and engages with the engagement recess of the steering shaft to enter the locked state. Further, the main microcomputer detects the LOCK position via the ignition switch 53 and the interlocking member 55, and executes control according to the LOCK position.

  In the lock device configured as described above, the operation member 31 exposed to the outside of the housing 10 can be operated not only by a regular driver but also by other persons aiming at unauthorized unlocking.

  However, when the operation member 31 is to be operated to the ACC position side in the non-authentication state without inserting the regular mechanical key and carrying the regular electronic key, as in the authentication state, The cylinder 30 and the rotor 24 work together with the operation member 31 so as to rotate relative to the holder 21. In the present embodiment, the rotor 24 cannot rotate with respect to the holder 21 because the engagement portion 62 of the engagement member 59 is engaged with the engagement receiving portion 27. Therefore, the operation member 31 cannot be rotated when neither the mechanical key nor the electronic key is used.

  In this state, when trying to unlock the lock device illegally, as a first method, it is conceivable to apply a large load to the operation member 31 exposed on the surface and forcibly rotate it. However, in the present embodiment, a notch 76 that prevents interference with the engaging member 59 at the engaging position is provided at the leading end of the blocking member 73 in the advancing direction, and the movable range of the engaging member 59 is ensured. Therefore, it is possible to sufficiently secure an engagement margin between the engagement portion 62 of the engagement member 59 and the engagement receiving portion 27 of the rotor 24. As a result, since these engagement strengths can be improved, unauthorized unlocking by applying a large rotational force to the operation member 31 can be reliably prevented.

  Further, as a second method, it is conceivable that a separate actuator cover 19 exposed on the surface of the housing 10 is removed by disassembly or destruction, and the internal cylinder lock 20 and the cam member 37 are directly operated. However, when the actuator cover 19 is removed, since the actuator 66 and the engaging member 59 are disposed inside, the cylinder lock 20 and the cam member 37 cannot be confirmed (operated) because they are in the way. Therefore, in order to confirm and operate the cylinder lock 20 and the cam member 37, the actuator 66 and the engaging member 59 are removed.

  However, in this embodiment, when the actuator 66 positioned outside (disposed from the outside) of the housing 10 is removed, the engagement between the holding portion 72 of the actuator 66 and the blocking member 73 is released. As a result, as shown in FIG. 6, the blocking member 73 is biased toward the cam member 37 by the biasing force of the blocking member biasing spring 74, and moves to the blocking position where it engages with the rotation blocking portion 47. As a result, as shown in FIG. 7, the cam member 37 cannot be operated in the unlocking direction, so that the locking device is not unlocked illegally.

  Further, at this blocking position, the communication hole 18 is closed by the advancement of the blocking member 73. In addition, in this closed state, both ends along the advance direction of the blocking member 73 are not visible from the actuator placement portion 17 side. Therefore, the internal cylinder 30 and the cam member 37 cannot be operated, and unauthorized unlocking can be surely prevented. For this effect, the arrangement in which the blocking member 73 is disposed in the holder 21 by disposing the blocking member 73 in the holder 21 greatly contributes. Moreover, the structure which arrange | positions the blocking member 73 in the holder 21 can also acquire the effect that assembly workability | operativity can be improved further.

  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 blocking member 73 is disposed so that the spring disposing portion 75 is positioned upward, but may be disposed so as to be positioned downward as shown in FIG. Good. Further, as shown in FIG. 8B, the spring disposition portion 75 may be configured by a hole having an open rear end instead of the concave groove. By doing so, the blocking member urging spring 74 cannot be visually recognized from the actuator mounting portion 17 and the blocking member 73 viewed through the communication hole 18 is in a flat state. Can be prevented from moving to the non-blocking position. As a result, unauthorized unlocking can be prevented more reliably.

  Moreover, in the said embodiment, although the locking device mounted the cylinder lock 20 which has the cylinder 30 in order to make a mechanical key usable, when using only an electronic key, the cylinder 30 is unnecessary. In this case, the end of the rotor 24 is protruded from the housing 10, and the operation member 31 is disposed on the protruding portion.

  Furthermore, in the said embodiment, although the holder 21 was provided as a component of the cylinder lock 20, it is good also as a structure which the prevention member arrangement | positioning part 22 is provided in the housing 10, and the holder 21 is not provided. Furthermore, in the above-described embodiment, the separate slider 50 is disposed on the lock bolt 48, but the configuration of the slider 50 may be integrally provided on the lock bolt 48.

  Furthermore, in the above-described embodiment, the cam member 37 is provided with the protruding portion to form the rotation preventing portion 47. However, the rotation preventing portion 47 is formed to be recessed in a concave shape, and the blocking member 73 is fitted into the concave portion. It may be configured.

It is sectional drawing which shows the steering lock apparatus which concerns on embodiment of this invention. It is sectional drawing which shows only a housing. It is a disassembled perspective view which shows the structure of a part of cylinder lock, a cam member, and an authentication lock mechanism. It is sectional drawing which shows the non-engagement state of an engagement member. It is sectional drawing which shows the state which operated the operation member in the authentication state. It is sectional drawing which shows the state of the blocking position which removed the actuator. It is a front view which shows the relationship between the blocking member and cam member in a blocking position. (A), (B) is a perspective view which shows the modification of a blocking member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Housing 11 ... Lock member arrangement | positioning part 12 ... Switch member arrangement | positioning part 17 ... Actuator arrangement | positioning part 18 ... Communication hole 20 ... Cylinder lock 21 ... Holder 24 ... Rotor 27 ... Engagement receiving part 30 ... Cylinder 31 ... Operation member 36 ... Tumbler 37 ... Cam member 47 ... Rotation prevention part 48 ... Lock bolt 50 ... Slider 55 ... Interlocking member 59 ... Engagement member 62 ... Engagement part 66 ... Actuator 72 ... Holding part 73 ... Prevention member 74 ... Prevention member biasing Spring 76 ... Notch

Claims (5)

A rotor that is rotatably housed in a housing and has an operation portion exposed outside the housing;
A cam member that rotates integrally with the rotor and is provided with a rotation blocking portion;
An unlocking mechanism that allows the steering shaft to be rotated by releasing the engagement with the steering shaft from a locked position that interlocks with the rotation of the cam member and engages the steering shaft to prevent the steering shaft from rotating. A lock bolt that can be moved to a position,
An engagement member that detachably engages with an engagement receiving portion provided on the rotor and prevents rotation of the rotor in the engaged state;
An actuator for moving the engagement member from an engagement position engaged with an engagement receiving portion of the rotor to a non-engagement position where the engagement with the rotor is released;
The engagement with the rotation preventing portion is released from a blocking position that is biased by the biasing means toward the cam member and engages with the rotation blocking portion of the cam member to block the rotation of the cam member. A blocking member movable toward the non-blocking position,
A steering lock device, wherein the actuator is provided with a holding portion that engages with the blocking member when mounted on the housing and holds the blocking member in a non-blocking position.   The housing includes a lock member disposition portion that rotatably disposes the rotor, and an actuator disposition portion that has a communication hole communicating with the lock member disposition portion and disposes the actuator and the engagement member. 2. The steering lock device according to claim 1, wherein the engagement member protrudes into the lock member disposition portion through the communication hole and engages with the engagement receiving portion of the rotor.   The blocking member closes the communication hole by advancing to a blocking position, and is provided with a notch for preventing interference with the engaging member at the engaging position at the tip in the advancing direction. The steering lock device according to claim 2.   4. The steering lock device according to claim 2, wherein the holding portion protrudes into the lock member disposition portion through the communication hole and engages with the blocking member. 5.   A holder for rotatably accommodating the rotor is disposed in a lock member disposition portion of the housing, and the blocking member is disposed on an outer peripheral portion of the holder so as to be movable by a biasing means. The steering lock device according to any one of claims 2 to 4.

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