JP5072485B2 - 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 turns the key to the LOCK position and pulls out the key to stop the engine of the automobile, the lock bolt that can be advanced and retracted advances and engages with the engagement recess provided on the steering shaft. Thus, the rotation of the steering shaft is restricted and the steering is locked. On the other hand, when the driver rotates the key from the LOCK position to the ACC position in order to start the engine, the lock bolt moves backward from the engagement recess to release the engagement, thereby rotating the steering shaft. The regulation is released and the steering is unlocked.

  However, in this steering lock device, although the lock bolt is urged by the spring in the advancing direction, if the housing is subjected to a strong impact with a hammer or the like for the purpose of theft, the lock bolt is May operate to reverse against the biasing force. The steering lock device also includes a lock link for maintaining an unlocked state until the key is pulled out of the cylinder even when the key is rotated to the LOCK position. For this reason, when a load is applied so that the lock bolt moves backward against the urging force of the spring with an illegal dummy key inserted into the cylinder, the lock bolt is unlocked by engaging the lock bolt with the lock link. There is a problem of being maintained in a state.

  Prior art document information on a steering lock device that can prevent such unauthorized unlocking includes the following.

JP 2000-203387 A

  In this patent document, the lock bolt is provided with a pin urged by a spring, and an engagement groove is provided for engaging the pin with a rotating member provided at the tip of the cylinder in the key insertion direction. And even if the load which reverse | retreats to a lock bolt is added in the state which inserted the regular key or the dummy key, the lock bolt is prevented from being maintained in the unlocked state by abutting the engagement groove.

  However, the steering lock device of this patent document has a problem in terms of durability and reliability because the pin is slid in a state of being biased to the engagement groove. In particular, in this patent document, the rotating member is provided with a cam groove that constitutes the engaging groove, and a pin is brought into contact with the edge of the cam groove, thereby also serving as an interlocking mechanism for moving the lock bolt forward and backward. . Therefore, an excessive load is applied to the pin, so that the pin is likely to be deformed due to wear, and there is a high possibility that a malfunction such as malfunction occurs. When a malfunction occurs, the lock bolt cannot be moved back and forth. In this case, there is a high possibility that the steering cannot be operated in a locked state by the lock bolt urged in the advance direction.

  The present invention has been made in view of conventional problems, and it is an object of the present invention to provide a steering lock device that can prevent unauthorized unlocking with a simple configuration and is excellent in durability and reliability. .

  In order to solve the above-mentioned problems, a steering lock device of the present invention is engaged with a steering shaft, a cylinder that is rotatably housed in a housing and rotated by a key, a cam member that rotates integrally with the cylinder, and a steering shaft. And a lock member that is urged by a spring in a protruding position direction that prevents rotation of the steering shaft and moves to a retracted position in which the engagement with the steering shaft is released according to the rotation of the cam member, and the cylinder When the lock member is moved to the retracted position, the lock member is engaged and retracted when the lock member is moved to the retracted position. In a steering lock device with a lock link held in position, impact acceleration is applied by an impact on the steering lock device. Once, the moves within the housing to prevent movement of the lock link has a configuration in which a counterweight to prevent engagement with the lock link and lock receiving portion of the locking member.

  According to the steering lock device of the present invention, even if a reverse force is applied to the lock member in a state where the dummy key is inserted into the key hole, the counterweight moves backward together with the lock member and engages with the lock link. Since the movement is blocked and the engagement between the lock receiving portion of the lock member and the lock link is blocked, it is possible to prevent the lock member from being in the unlocked position and maintaining this state. Further, since unauthorized unlocking can be prevented with a simple configuration in which a counterweight is provided with respect to a conventional steering lock device, the durability and reliability of the steering lock device are not impaired.

  Further, the lock member is provided with a guide surface that moves the locking portion provided on the lock link so as to guide the locking portion to the locking receiving portion of the lock member, and cannot be moved due to movement restriction by the counterweight. You may comprise so that the movement to the retraction position side of the said lock member may be prevented when the guide surface of the said lock member contacts the said lock link. In this way, it is sufficient to prevent the lock link from being actuated by the counterweight for a moment when the lock member is about to retreat to the retracted position due to an impact, and the antitheft effect can be enhanced.

  Further, the counterweight may be arranged to be movable in the same direction as the operating direction of the lock member. In this way, it is impossible to selectively actuate only the lock member due to an impact, and thus the antitheft effect can be enhanced.

  In the steering lock device of the present invention, since the engagement between the lock receiving portion of the lock member and the lock link is prevented by restricting the movement of the counterweight with respect to the lock link, unauthorized unlocking can be easily prevented. In addition, the counterweight for preventing unauthorized unlocking is not a part that drives the lock bolt forward / backward, but is a dedicated part that is independently provided in a separate system, so it is possible to prevent theft while maintaining reliability and durability. It can be improved.

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

  FIG. 1A shows a steering lock device according to an embodiment of the present invention. This steering lock device is generally provided with a cylinder lock 23, a cam member 42, and a lock bolt 54 inside the housing 10, and with respect to an ignition switch 65 for turning on / off power to each device in the automobile. An interlocking member 68 that transmits the rotation of the cylinder lock 23, a lock link 35 that restricts the forward and backward movement of the lock bolt 54, and a counterweight 73 that restricts the movement of the lock link 35 are provided.

  The housing 10 has a hollow shape having an L shape including a lock member disposing portion 11 extending in the horizontal direction in FIG. 1A 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 42 and an interlocking member 68 described later is provided between the protruding plate portion 13 and the inner peripheral surface of the switch member disposing portion 12. Further, at the end of the projecting plate portion 13 on the lower side of the connecting space portion 15, the projecting plate so that a cam holding portion 13 a that rotatably holds a cam member 42 to be described later is positioned at the axis of the lock member disposing portion 11. It is provided integrally with the part 13. The corner portion 16 of the housing 10 is provided with an insertion hole 17 that penetrates along the extending direction of the lock member disposing portion 11 and through which the lock bolt 54 can be advanced and retracted. Further, a stopper portion 18 is provided on the inner surface side of the insertion hole 17 in the lock member disposition portion 11 to stop the advancement of the lock bolt 54 by contacting a slider 57 described later. Further, a storage unit 19 that stores a counterweight 73 (described later) movably in the horizontal direction is provided on the side of the lock member installation unit 11. The lock member installation unit 11 and the storage unit 19 are arranged in the horizontal direction. The groove-like operating hole 20 extends to communicate with each other. In addition, the corner | angular part 16 of the housing 10 of this embodiment is made into the shape which has the inclination part 21 according to the inclination angle of the steering shaft (not shown) of the motor vehicle with which it mounts | wears.

  The cylinder lock 23 is disposed inside the cylinder 28, a cylindrical holder 24 attached to one end of the lock member disposing portion 11, a cylinder 28 disposed rotatably inside the holder 24, and the cylinder 28. And a plurality of tumblers 32.

  The holder 24 is provided with a locking groove 25 for inserting and locking a tumbler 32 protruding radially outward from the cylinder 28 on the inner peripheral surface thereof. Further, the holder 24 is provided with a lock link disposing portion 26 for disposing a lock link 35 described later so as to be swingable. The lock link disposing portion 26 is provided with a holding groove 26 a that holds a shaft portion 36 of the lock link 35 described later so as to be movable in a direction perpendicular to the rotation axis direction of the cylinder 28. Further, as shown in FIG. 1 (B), in the holder 24, the front side exposed to the outside of the housing 10 has a predetermined clockwise position in the order of the LOCK position, the ACC position, the ON position, and the START position. Notations 27a to 27d are engraved.

  The cylinder 28 is provided with a key hole 29 extending along the rotation axis and a plurality of tumbler insertion holes (not shown) arranged side by side so as to extend in a direction orthogonal to the rotation axis. In the cylinder 28, a flange 30 for positioning at the end of the holder 24 is provided at an end located on the opposite side to the opening end of the key hole 29. In addition, a cam mounting portion 31 protrudes from the collar portion 30. The cam mounting portion 31 has the same shape as the mounting hole 44 of the cam member 42 described later.

  The tumbler 32 is disposed in a tumbler insertion hole together with a spring (not shown), and a through hole (not shown) through which a key 79 made of a mechanical structure passes is provided in the center. When the key 79 is inserted into the key hole 29 of the cylinder 28, the key pile presses the edge of the through hole of the tumbler 32, so that each tumbler 32 is retracted into the cylinder 28 against the urging force of the spring. Thus, the locking of the holder 24 with the locking groove 25 is released. As a result, by rotating the key 79, the cylinder 28 can be rotated in the range from the LOCK position to the START position.

  In addition, the cylinder lock 23 of the present embodiment is provided with a key detection member 33 that is driven to slide when the key 79 is inserted into the key hole 29. The key detection member 33 moves from the position biased to the rotation axis in the cylinder 28 to the vicinity of the outer peripheral portion, and operates the lock link 35 provided in the lock link arrangement portion 26 of the holder 24.

  The lock link 35 is pivotally attached to the lock link mounting portion 26 so that when the key 79 is inserted into the key hole 29, the lock bolt 54 in the retracted (unlocked) state cannot be advanced via the slider 57. To be locked. Specifically, the lock link 35 includes a shaft portion 36 that is movably held in the holding groove 26a at the center portion, an abutting portion 37 that is positioned on the slide locus of the key detection member 33 at one end portion, and the other end. The portion 38 is provided with a locking portion 39 that protrudes in a direction substantially orthogonal to the rotation axis direction of the cylinder 28. Further, in the vicinity of the contact portion 37, a lock release spring 40 is disposed as an urging means for releasing the lock bolt 54 when the key detection member 33 is not in contact.

  When the cam member 42 is mounted on the cam mounting portion 31 of the cylinder 28, the cam member 42 is integrally rotated with the cylinder 28 in the range from the LOCK position to the START position. , The cam holding portion 13a of the protruding plate portion 13 is rotatably held. As shown in FIG. 2, the cam member 42 generally includes a mounting portion 43, a cam portion 47, and an interlocking operation portion 50.

  The mounting portion 43 is mounted in a non-rotatable state with respect to the cylinder 28 by being externally fitted to the cam mounting portion 31, and has an oval hole portion having an oval shape and a pair of arc-shaped groove portions. A mounting hole 44 is provided. In the mounting hole 44, the intermediate portion in the axial direction is closed. The mounting portion 43 is positioned by inserting a cam biasing spring 45 disposed between the mounting portion 43 and the cylinder 28 from one end of the mounting hole 44. Further, the opposite side is formed in a cylindrical shape so as to be fitted on the cam holding portion 13 a of the housing 10.

  The cam portion 47 is provided so as to be positioned below the lock member disposing portion 11 when mounted on the housing 10. The cam portion 47 has a first cam surface 48, a second cam surface 49, and an end surface located on the side opposite to the advancing direction of the lock bolt 54 along the rotation axis direction of the cam member 42, that is, on the cylinder 28 side. Is provided. The first cam surface 48 extends from the LOCK position to the ACC position of the cam member 42 interlocked with the rotation of the cylinder 28, and moves the lock bolt 54 in the advanced state back through the slider 57. The second cam surface 49 extends from the ACC position to the START position of the cam member 42 and holds the retracted position of the lock bolt 54 via the slider 57.

  The interlocking operating portion 50 is provided on the opposite side to the cam portion 47 so as to be positioned in the connecting space portion 15 of the protruding plate portion 13 in the mounted state on the housing 10. The interlocking operating portion 50 is provided with a bevel gear portion 51 on the outer peripheral edge of the front end surface.

  Further, a gap portion 52 into which the slider 57 can enter is provided between the cam portion 47 and the interlocking operation portion 50.

  The lock bolt 54 is disposed so as to be movable along the rotational axis direction of the cam member 42, and is attached to the insertion hole 17 of the housing 10 so as to be able to advance and retract. Between the lock bolt 54 and the cam holding portion 13a of the housing 10, a lock bolt biasing spring 46 that biases the lock bolt 54 in the advancing direction is disposed. In the present embodiment, a slider connecting portion 55 protruding in a substantially L shape is provided at the rear end portion of the lock bolt 54, and the slider connecting portion 55 is provided separately for interlocking with the rotation of the cam member 42. The slider 57 is disposed, and the lock bolt 54 and the slider 57 constitute a lock member.

  The slider 57 is slidable along the rotation axis direction of the cam member 42 between the cam portion 47 of the cam member 42 and the inner peripheral surface of the lock member arrangement portion 11 in the lock member arrangement portion 11. It is to be attached. An L-shaped connecting portion 58 connected to the slider connecting portion 55 of the lock bolt 54 is provided at the front end portion of the slider 57. The connecting portion 58 also serves as a stopper for stopping the advancement of the lock bolt 54 by contacting the stopper portion 18 of the housing 10. Further, at the rear end portion of the slider 57, the connecting portion 58 is in contact with the stopper portion 18, and the tip end surface projects toward the rotating shaft so that the front end surface is in sliding contact with the first cam surface 48 of the cam portion 47. A sliding portion 59 is provided. The sliding portion 59 is formed in the cam member 42 with a width dimension (depth in FIG. 1A) smaller than the interval of the gap portion 52. The slider 57 is provided with a lock portion 60 that protrudes from the sliding portion 59 toward the lock link 35. The lock portion 60 is positioned above the locking portion 39 in the lock link 35, and protrudes toward the lock link 35 toward the direction approximately perpendicular to the moving direction of the slider 57 at the end of the lock portion 60. A latch receiving portion 61 for latching the 35 latching portions 39 is formed. As shown in FIG. 4, the lock receiving portion 61 is configured to engage with the lock portion 39 of the lock link 35 at the unlock position where the lock bolt 54 is completely retracted into the insertion hole 17. A guide surface 62 is provided at the end of the lock portion 60 on the lock link 35 side so as to be inclined in the tapering direction and guide the locking portion 39 of the lock link 35 to the locking receiving portion 61. As shown in FIG. 3, the guide surface 62 contacts the other end portion 38 of the lock link 35 with the key inserted into the cylinder 28, and the lock link 35 is retracted by the retraction of the lock bolt 54 and the slider 57. The other end portion 38 of the lock link 35 moves in the counterclockwise direction along the guide surface 62 and is movable to a position where the locking portion 39 of the lock link 35 can engage with the locking receiving portion 61. is there.

  The ignition switch 65 is detection means for detecting the rotational position of the cylinder 28, and is disposed at the opening end of the switch member disposition portion 12 in the housing 10 via an ignition lid 66. In other words, the ignition lid 66 is disposed at the opening end of the switch member disposing portion 12, and the ignition switch 65 is disposed outside thereof. The ignition switch 65 detects the rotation of the cylinder 28 via the cam member 42 and the interlocking member 68, and stops the engine and all the devices at the LOCK position according to the rotation position of the cylinder 28, and at the ACC position. The engine is stopped and only some load components such as audio are operated. In the ON position, all load components can be operated, and when the engine is driven, the driving state is maintained, and in the START position. The electric circuit is switched to start the engine. A return spring (not shown) is disposed inside the ignition switch 65, and the interlocking member 68, the cam member 42, and the cylinder 28 are returned from the START position to the ON position by the urging force of the return spring.

  The interlocking member 68 transmits the rotational position of the cylinder 28 to the ignition switch 65 by rotating in conjunction with the rotation of the cam member 42. Further, the urging force to be returned by the return spring of the ignition switch 65 is transmitted to the cylinder 28 via the cam member 42. Specifically, the interlocking member 68 is provided with a connecting shaft 69 that penetrates the ignition lid 66 and is connected to the ignition switch 65 at the upper end thereof. Further, a shaft portion 70 that is rotatably supported by the bearing portion 14 of the housing 10 protrudes from the lower end of the interlocking member 68. On the upper side of the shaft portion 70, a similar bevel gear portion 71 that protrudes radially outward so as to form a disk shape and is located in the connecting space portion 15 and meshes with the bevel gear portion 51 of the cam member 42 is provided. ing.

  The counter weight 73 is located below the other end portion 38 of the lock link 35 and is housed in the housing portion 19 of the housing 10 so as to be movable along the operating direction of the lock bolt 54 and the slider 57. The counterweight 73 is urged forward (lock bolt 54 advancement side) by a counterweight spring 74 stored in the storage unit 19. The counterweight 73 is provided with a blocking portion 75 that protrudes toward the lock link 35 and penetrates the operating hole 20 of the housing 10 and enters the lock member disposition portion 11. When a strong impact is applied to the housing 10 with a hammer or the like, the counterweight 73 exerts an inertial force on the counterweight 73 due to the impact acceleration, and resists the urging force of the counterweight spring 74 against the blocking portion. 75 moves from a non-engagement position where it does not interfere with the other end portion 38 of the lock link 35 to an engagement position located on the movement track of the other end portion 38 of the lock link 35. The moving speed and moving amount of the counterweight 73 due to the impact acceleration can be adjusted by increasing or decreasing the weight of the counterweight 73 and the biasing force of the counterweight spring 74, respectively. Further, a lid member 76 is fixed to the opening end of the storage portion 19 by a one-way screw 77 to prevent the counterweight 73 from being removed from the outside. The one-way screw 77 has such a shape that the screw head can only be turned in the tightening direction, does not turn in the loosening direction, and cannot be removed once tightened.

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

  First, in a state where the cylinder 28 is in the LOCK position and the key 79 is not inserted into the key hole 29, the steering lock device is in the locked state shown in FIG. When the steering shaft is locked, the sliding portion 59 of the slider 57 is positioned in the gap portion 52 of the cam member 42. Accordingly, the slider 57 can slide until the connecting portion 58 contacts the stopper portion 18. Therefore, the lock bolt 54 is advanced by the urging force of the lock bolt urging spring 46, and the connecting portion 58 of the slider 57 is in contact with the stopper portion 18 in conjunction therewith. As a result, the front end of the lock bolt 54 protrudes to the outside from the insertion hole 17 of the housing 10 and engages with an engagement recess of a steering shaft (not shown).

  When the driver inserts the regular key 79 into the key hole 29 in this LOCK state, the key detection member 33 moves radially outward in the cylinder 28 as shown in FIG. The part 37 moves against the urging force of the latch release spring 40. As a result, the other end 38 of the lock link 35 moves in the clockwise direction around the shaft 36 and the other end 38 comes into contact with the guide surface 62 of the slider 57. Further, the tumbler 32 is immersed in the cylinder 28, and the cylinder 28 becomes rotatable with respect to the holder 24. When the cylinder 28 is rotated clockwise in this state, the cam member 42 integrally rotates clockwise.

  When the cylinder 28 is further rotated, the sliding portion 59 is brought into sliding contact with the first cam surface 48, whereby the slider 57 is moved to the rear end surface side of the cam portion 47. As a result, as shown in FIG. 4, the lock bolt 54 is moved backward integrally to be retracted into the housing 10. Further, by the retraction of the lock bolt 54, the other end portion 38 of the lock link 35 moves in the counterclockwise direction against the biasing force of the latch release spring 40 along the guide surface 62 with the contact portion 37 as a fulcrum. To do. Then, when the regular key 79 is rotated to the ACC position, the guide of the other end 38 by the guide surface 62 is released, and the other end 38 is moved in the clockwise direction by the biasing force of the locking release spring 40, and the slider. The lock receiving portion 61 of 57 is engaged with the lock portion 39 of the lock link 35, and the unlocked state is maintained until the regular key 79 is removed from the key hole 29.

  On the other hand, when the cam member 42 is rotated by the rotation of the cylinder 28, the interlocking member 68 is rotated in a rotation axis direction different from that of the cam member 42 due to the engagement of the bevel gear portions 51 and 71.

  When the cylinder 28 is rotated to the ACC position in this way and then the cylinder 28 is further rotated to the ON position, the cam member 42 and the interlocking member 68 are rotated, while the lock bolt 54 is moved backward. Not maintain its position. Then, the ignition switch 65 detects the ON position of the cylinder 28 by the regular key 79 by the rotation of the interlocking member 68, and outputs it to the main microcomputer of the automobile.

  When the cylinder 28 is further rotated to the START position, similarly, the cam member 42 and the interlocking member 68 are rotated, while the lock bolt 54 is not moved backward and maintains its position. Then, the ignition switch 65 detects the START position of the cylinder 28 by the regular key 79 by the rotation of the interlocking member 68 and outputs it to the main microcomputer of the automobile. In this rotating state, the return spring disposed inside the ignition switch 65 is contracted.

  If the driver releases his hand from the regular key 79 while the cylinder 28 is rotated to the START position, the return spring contraction restriction built in the ignition switch 65 is released. Therefore, the interlocking member 68 is rotated in the reverse direction by the urging force of the return spring. As a result, the cam member 42 is rotated in conjunction with it, and the cylinder 28 is integrally rotated counterclockwise to automatically return to the ON position.

  On the other hand, when the cylinder 28 in the ON position is rotated to the ACC position, the cam member 42 and the interlocking member 68 are rotated in the opposite direction, while the lock bolt 54 is maintained in its position without moving forward. . And the ignition switch 65 detects the ACC position of the cylinder 28 by the regular key 79 by the rotation of the interlocking member 68, and outputs it to the main microcomputer of the automobile.

  When the cylinder 28 is further rotated to the LOCK position, the cam member 42 and the interlocking member 68 are interlocked. At this time, since the lock bolt 54 is locked to the lock link 35 via the slider 57, the lock bolt 54 does not move forward regardless of the biasing force of the lock bolt biasing spring 46 and the inclination of the first cam surface 48. Hold the unlock position.

  When the driver pulls out the regular key 79 from the key hole 29, as shown in FIG. 1A, the pressing of the key detection member 33 by the regular key 79 is released, so that the lock release spring 40 is attached. The lock link 35 is rotated by the force. As a result, when the engagement between the lock link 35 and the slider 57 is released, the lock bolt 54 advances together with the slider 57 by the urging force of the lock bolt urging spring 46, and the engagement is made in the engagement recess of the steering shaft. Match.

  When a dummy key 79 ′ other than the regular key 79 is inserted into the key hole 29, the tumbler 32 is not immersed in the cylinder 28 in FIG. The only difference is. That is, the key detection member 33 moves radially outward in the cylinder 28, so that the lock link 35 moves against the urging force of the latch release spring 40.

  In this state, when a strong impact is applied to the housing 10 with a hammer or the like, and an inertial force is applied in a backward direction to the lock bolt 54 and the slider 57 due to impact acceleration due to the impact, the lock bolt 54 and the slider are 57 reverses against the biasing force of the lock bolt biasing spring 46. However, at this time, an inertial force is also applied to the counterweight 73 in the direction in which the counterweight 73 moves backward due to the impact acceleration caused by the impact, and the counterweight 73 has a counterweight spring 74 as shown in FIGS. The blocking portion 75 moves backward from the non-engagement position to the engagement position where the other end portion 38 of the lock link 35 is engaged against the urging force. Thereby, the counterclockwise rotation of the lock link 35 is prevented, and the guide surface 62 of the slider 57 abuts against the other end portion 38 of the lock link 35 which has become unable to move, so that the lock bolt 54 and the slider 57 The backward movement is prevented, and the movement of the lock bolt 54 toward the unlock position is prevented. As described above, since the lock bolt 54 is prevented from moving backward, the locking portion 39 of the lock link 35 is not engaged with the locking receiving portion 61 of the slider 57, and the lock bolt 54 is unlocked by the lock link 35. It is not held in the locked position.

  After the inertial force acting on the lock bolt 54, slider 57, and counterweight 73 is received by the movement restriction of the lock link 35 by the counterweight 73, the lock bolt 54, slider 57 is biased by the urging force of the springs 46, 74. Then, the counterweight 73 moves forward and returns to the state shown in FIG. 3 (the tumbler 32 protrudes).

  As described above, in the steering lock device of the present invention, even if a reverse force acts on the lock bolt 54 with the dummy key 79 ′ inserted into the key hole 29, the counterweight 73 moves backward together with the lock bolt 54, and the lock link In this state, the lock bolt 54 is in the unlocked position to prevent the lock link 35 from engaging with the lock link 35 and to prevent the lock receiving portion 61 of the slider 57 from engaging with the lock link 35. Can be prevented. Further, since unauthorized unlocking can be prevented with a simple configuration in which a counterweight 73 is provided with respect to the conventional steering lock device, the durability and reliability of the steering lock device are not impaired. In the steering lock device of the present embodiment, even if the counterweight 73 is removed, the function of the normal steering lock device is not impaired at all. The steering lock device can be configured, and the parts can be shared.

  In this embodiment, the slider 57 is provided with a guide surface 62 that moves the locking portion 39 provided on the lock link 35 so as to guide the locking portion 39 to the locking receiving portion 61 of the slider 57. Because the guide surface 62 of the slider 57 is brought into contact with the lock link 35 that has become unable to move due to the movement, the movement of the lock bolt 54 and the slider 57 to the retracted position side is prevented. It is only necessary to prevent the lock link 35 from being actuated by the counterweight 73 for a moment when it is about to retreat to the position, and the antitheft effect can be enhanced.

  Furthermore, in this embodiment, since the counterweight 73 is arranged so as to be movable in the same direction as the operation direction of the lock bolt 54, it is impossible to selectively operate only the lock bolt 54 by an impact. Thereby, the antitheft effect can be enhanced.

  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 separate slider 57 is disposed on the lock bolt 54, but the configuration of the slider 57 may be integrally provided on the lock bolt 54. Moreover, in the said embodiment, although the guide surface 62 is made into the plane inclined surface, a curved surface and a circular arc surface may be sufficient.

  Furthermore, in the embodiment, the guide surface 62 is provided on the slider 57 side, but the guide surface 62 may be provided on the lock link 35 side. That is, the lock link 35 is provided with a guide surface that moves the locking portion 39 provided on the lock link 35 so as to be guided to the locking receiving portion 61 of the lock member. Further, the lock member may be configured to be prevented from moving to the retracted position side when the lock member comes into contact with the guide surface of the lock link 35. If comprised in this way, the operation | movement of the lock link 35 should just be blocked | prevented by the counterweight 73 only for the moment when the lock bolt 54 tries to retract | save to an evacuation position with an impact, and a theft prevention effect can be heightened.

BRIEF DESCRIPTION OF THE DRAWINGS The steering lock apparatus of embodiment of this invention is shown, (A) is sectional drawing, (B) is a principal part front view. It is a perspective view which shows a cam member. It is sectional drawing which shows the state which inserted the key in the LOCK position. It is sectional drawing which shows the state which rotated the key to the ACC position. A state where an impact is applied after the dummy key is inserted at the LOCK position is shown, (A) is a cross-sectional view, and (B) is an enlarged part of a main part.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Housing, 28 ... Cylinder, 35 ... Lock link, 39 ... Locking part, 42 ... Cam member, 46 ... Lock bolt urging spring (spring), 54 ... Lock bolt (lock member), 57... Slider (lock member), 61... Latching receiving portion, 73.

Claims (3)

  A cylinder rotatably accommodated in the housing and rotated by a key, a cam member that rotates integrally with the cylinder, and a spring in a protruding position that engages with the steering shaft and prevents rotation of the steering shaft. A lock member that is energized and moves to a retracted position where the engagement with the steering shaft is released according to the rotation of the cam member, and a lock provided on the lock member according to the insertion of the key into the cylinder. In a steering lock device provided with a lock link that engages with a stop receiving portion and engages with the locking receiving portion to hold the lock member in the retracted position when the lock member moves to the retracted position. When an impact acceleration is input due to an impact on the steering lock device, the lock link moves by moving in the housing. Steering lock apparatus characterized by blocked, provided counterweight to prevent engagement with the lock link and lock receiving portion of the locking member.   The lock member is provided with a guide surface that moves the locking portion provided on the lock link so as to guide the locking portion to the locking receiving portion of the lock member, and the lock that has become unmovable due to movement restriction by the counterweight. 2. The steering lock device according to claim 1, wherein the lock member is configured to be prevented from moving to a retracted position side when a guide surface of the lock member comes into contact with a link. 3.   3. The steering lock device according to claim 1, wherein the counterweight is disposed so as to be movable in the same direction as an operation direction of the lock member.

Images