JP5180018B2 - 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, even if a strong impact is applied to the body with a hammer or the like for the purpose of theft, the lock bolt is not 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 58-174045 A

  In this Patent Document 1, as shown in FIGS. 8A and 8B, a pin 104 urged by a spring 103 to a cam member 102 that operates a lock bolt 101 is disposed in a hole 105 of the cam member 102. When the lock bolt 101 is in the locked state, the hanger 106 connected to the lock bolt 101 can be engaged with the pin 104. Then, even when a load that moves backward is applied to the lock bolt 101 with the regular key or dummy key inserted, the pin 104 comes into contact with the hanger 106 to prevent the lock bolt 101 from being moved to the unlock position. Yes.

  Further, in the steering lock device disclosed in Patent Document 1, when an unlocking operation is performed, first, when a regular key is inserted into a cylinder (not shown) and the cylinder and the cam member 102 are rotated, the cam portion 102a of the cam member 102 The lock bolt 101 retreats upward in the figure against the urging force of the lock bolt urging spring 107 and moves to the unlock position indicated by the broken line in the figure. At this time, the pin 104 of the cam member 102 rotates together with the cam member 102 and moves in the lateral direction (in the direction of the arrow in FIG. 8A) that does not engage with the hanger 106 of the lock bolt 101. The movement to the unlock position is not hindered. Further, the lock bolt 101 that has once moved to the unlock position holds the lock bolt 101 in the unlock position until the key is removed from the cylinder by a check lever (not shown).

  On the other hand, when performing the locking operation, if the regular key is operated to rotate the cylinder to the LOCK position, the pin 104 can be engaged with the hanger 106 of the lock bolt 101 again as shown in FIG. Move to the correct position. When the key is removed in this state, the lock bolt 101 released from the check lever protrudes from the unlock position to the lock position by the biasing force of the lock bolt biasing spring 107, but at the same time, the pin 104 pushes the inclined surface 104a to the hanger 106. The lock bolt 101 can be moved to the lock position because it is pushed backward.

  However, in the steering lock device of Patent Document 1, when the key is removed from the cylinder and the lock bolt 101 is moved from the unlock position to the lock position by the biasing force of the lock bolt biasing spring 107, the hanger 106 of the lock bolt 101 is moved. Is in contact with the inclined surface 104a of the pin 104 and moves to the lock position while pushing the pin 104 in. Therefore, when the hanger 106 of the lock bolt 101 abuts against the inclined surface 104a of the pin 104, for example, if the pin 104 is caught in the hole 105 and does not get pulled, the hanger 106 of the lock bolt 101 is caught on the pin 104 and locked. There is a possibility that 101 does not move to the lock position normally.

  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 prevent unauthorized unlocking and prevent malfunction.

In order to solve the above problems, a steering lock device according to the present invention includes a cylinder that is rotatably accommodated in a body by a key operation, and rotates integrally with the cylinder in the body by a rotation operation of the cylinder. The cam member is accommodated in the body so as to be capable of moving back and forth along the rotation axis direction of the cam member , and is projected to the outside of the body by an urging force of a lock spring according to the rotation of the cam member, and is engaged with the steering shaft A lock member that moves from the lock position to the unlock position where the cam member resists the urging force of the lock spring and moves into the body and is disengaged from the steering shaft; One end is in slidable contact with the outer periphery of this, and this end is pushed up when the key is inserted, so that it swings as the key is inserted A steering lock device and a lock link for holding the locking member in the unlocked state at the other end, a generally flat plate shape, wherein as the flat portion is perpendicular to the rotational axis of the cylinder When the lock member is housed in a cylinder and the lock member is in the lock position, the flat portion protrudes from the cylinder so as to be engageable with the lock member and prevents the lock member from moving from the lock position to the unlock position. When the locking member is in the unlocked position, and when the locking member is in the unlocked position, the abutting position moves to the inside of the cylinder, and the retracted position does not engage with the engaging portion of the locking member. It is movable, and, while being accommodated without falling into the cylinder fixing pin is through a guide hole provided in the flat portion center, A blocking member biased toward the radially outer side of the cylinder is provided, and when the lock member is in the unlock position, the blocking member abuts on the lock member in response to a rotation operation of the cylinder. Accordingly, an operating portion that moves the blocking member from the blocking position to the retracted position is provided in the blocking member or the lock member.

  In the steering lock device of the present invention, since the movement of the blocking member from the blocking position to the retracted position is performed by the operation of the cylinder by the operator, the force for moving the blocking member to the retracted position can be increased, and the blocking member malfunctions. Can be prevented. As a result, malfunction of the steering lock device can be prevented.

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

  FIG. 1 shows a plan view of a steering lock device 1 of the present invention. 2A is a cross-sectional view in the lateral direction of FIG. 1, and FIG. 2B is a cross-sectional view along line AA in FIG. 2A (the same applies to FIGS. 4A, 6A, and 7), the right side is referred to as “front” and the left side as “rear” for convenience of explanation.

  This steering lock device 1 is roughly composed of a cylinder lock 3, a lock pin 4 for fixing the cylinder lock 3 to the body 2, a cam member 5 interlocking with the rotation of the cylinder lock 3, and a steering wheel. A lock member 6 that engages with the shaft and locks the steering shaft, and a lock link 7 that restricts the forward and backward movement of the lock member 6, and an ignition switch 8 that turns on and off power to each device in the vehicle, The interlocking member 9 that transmits the rotation of the cylinder lock 3 to the ignition switch 8 is disposed.

  As shown in FIG. 1, the body 2 is formed in a substantially cylindrical shape and a substantially L shape, and an attachment portion 11 for attachment to the periphery of the steering shaft is provided at the intersection. A cylinder lock 3 is attached to the open end of the first storage portion 12 provided on one end side (front side) of the body 2. An ignition switch 8 is attached to the open end of the second storage portion 13 provided on the other end side (upper side in FIG. 1) of the body 2. The first storage portion 12 of the body 2 is provided with an engagement hole 14 with which an outer end portion of a lock pin 4 described later of the cylinder lock 3 is engaged. Further, as shown in FIG. 2A, on the rear side inside the first storage portion 12, a lock member storage portion 15 that stores and holds the lock member 6 so as to be able to advance and retreat is provided along the rotation axis direction of the cylinder 27. It is extended.

  The cylinder lock 3 includes a substantially cylindrical cylinder outer 21 and a cylinder 27 that is rotatably held in the cylinder outer 21.

  The cylinder outer 21 is provided with a locking groove 22 for inserting and locking a tumbler 29 protruding radially outward from a cylinder 27 described later on the inner peripheral surface thereof. On the side of the cylinder outer 21, a lock link disposition groove 23 is disposed extending in the front-rear direction for disposing a lock link 7 to be described later in a swingable manner. The lock link mounting groove 23 is provided with a holding groove 24 that holds a shaft portion 51 of the lock link 7 described later so as to be movable in a direction orthogonal to the rotation axis direction of the cylinder 27. Further, as shown in FIG. 3, in the cylinder outer 21, on the front front side exposed to the outside of the body 2, the LOCK position, the ACC position, the ON position, and the operation position of the key inserted into the cylinder 27 are shown. Notations 25a to 25d are engraved at predetermined positions in the clockwise direction in the order of the START positions.

  The cylinder 27 is movable in a direction perpendicular to the key hole 28 (shown in FIG. 3) extending along the rotation axis and the rotation axis, and is directed radially outward by a biasing force of a spring (not shown). And a plurality of biased tumblers 29. Then, when the key is inserted into the key hole 28 of the cylinder 27, each tumbler 29 is immersed in the cylinder 27 against the biasing force of the spring, and the locking with the locking groove 22 of the cylinder outer 21 is released. As a result, the cylinder 27 can be rotated in the range from the LOCK position to the START position by rotating the key.

  Further, as shown in FIGS. 2A and 2B, a flange 30 for positioning at the end of the cylinder outer 21 is provided at the rear end of the cylinder 27. In a storage hole 31 formed on the outer peripheral surface of the flange portion 30, a blocking member 33 that restricts movement of the lock member 6 described later is stored so as to be able to advance and retract.

  The blocking member 33 has a substantially plate shape, and is stored in the storage hole 31 of the cylinder 27 so that the plane thereof is orthogonal to the rotation axis direction of the cylinder 27. A rectangular guide hole 34 is provided in the center of the flat surface of the blocking member 33, and a fixing pin 35 inserted from the rear end surface of the flange 30 of the cylinder 27 passes through the guide hole 34 of the blocking member 33 into the cylinder 27. By being fixed, the blocking member 33 is housed in the housing hole 31 of the cylinder 27 so as not to fall off. Specifically, a spring 32 that energizes the blocking member 33 in a protruding direction (outside in the radial direction of the cylinder 27) is stored in the storage hole 31. The inner edge of the guide hole 34 of the blocking member 33 biased by the spring 32 abuts on the fixing pin 35 so that the outer end of the blocking member 33 can engage with an engaging portion 79 of a slider 74 described later. It is held in a state (blocking position) protruding from the flange 30. Further, the outer end portion of the blocking member 33 protruding from the storage hole 31 is formed in a substantially semicircular shape when viewed from the rotation axis direction of the cylinder 27. This curved surface is configured as an inclined portion 37 (actuating portion) that abuts against the slider 74 in the rotational direction of the cylinder 27 and moves the blocking member 33 to the inside of the cylinder 27. Further, the blocking member 33 is provided at a position where the outer end protruding from the flange portion 30 with the cylinder 27 in the LOCK position faces the engaging portion 79 of the slider 74 along the rotation axis direction of the cylinder 27. It has been.

  The lock pin 4 is inserted into the recess 41 formed in the rear end portion of the cylinder outer 21 together with the lock pin urging spring 42 after the cylinder 27 is inserted into the cylinder outer 21 from the rear side, and the presser plate 43 is caulked. It is attached to the cylinder outer 21 by being fixed by means such as, and the spring receiver 44 protrudes to a position where it comes into contact with the holding plate 43 by the urging force radially outward by the lock pin urging spring 42, and its outer end is the body. The two engagement holes 14 are engaged. Further, in this assembled state, the inner end portion of the lock pin 4 abuts against the flange portion 30 of the cylinder 27, so that the rearward movement of the cylinder 27 is restricted with respect to the cylinder outer 21.

  Further, in the cylinder lock 3 of the present embodiment, a key detection member 50 that is driven to slide when a key is inserted into the key hole 28 is disposed inside the front side of the cylinder 27. The key detection member 50 moves from a position biased to the rotation axis in the cylinder 27 to a position coinciding with the outer peripheral surface of the cylinder 27, and operates a lock link 7 described later.

  The lock link 7 is pivotally attached to the lock link disposition groove 23 of the cylinder outer 21 so as to be swingable. The lock link 7 is engaged with the slider 74 of the lock bolt 70 at the unlock position and locked so as not to advance when a key is inserted into the key hole 28. Specifically, the lock link 7 is a long plate-like member, and is provided with a shaft portion 51 that is movably held in the holding groove 24 of the cylinder outer 21 at the center portion, and in the cylinder 27 at one end portion. A contact portion 52 located on the slide drive locus of the key detection member 50 disposed, and a locking portion 53 protruding in a direction substantially orthogonal to the rotation axis direction of the cylinder 27 at the other end portion. ing. Further, between the abutting portion 52 and the shaft portion 51 at one end, one end portion of the lock link 7 protrudes into the cylinder 27 when the key is not inserted into the cylinder 27, and the other end of the lock link 7. An engagement release spring 54 for releasing engagement between the engagement portion 53 and the lock bolt 70 is provided.

  The cam member 5 is connected to the rear end of the cylinder 27 so as to rotate integrally with the cylinder 27 within the range from the LOCK position to the START position. A cylinder biasing spring 61 is provided between the rear end of the cylinder 27 and the cam member 5 to prevent the cylinder 27 from rattling. The cam member 5 is provided with a cam portion 62 that moves a lock member 6 described later from the lock position to the unlock position by rotating the cam member 5 from the LOCK position to the ACC position. Further, the rear end edge of the cam member 5 is provided with a gear portion 63 that meshes with the bevel gear 9 that operates the ignition switch 8, and the bevel gear 9 rotates according to the rotation of the cylinder 27 and the cam member 5. Then, a contact in an ignition switch 8 to be described later is switched.

  The lock member 6 is configured by connecting a lock bolt 70 that engages and disengages with an engagement recess of the steering shaft and a slider 74 as an operation unit.

  The lock bolt 70 is accommodated in the lock member accommodating portion 15 of the body 2 so as to be able to advance and retreat along the rotation axis direction of the cam member 5. The lock bolt 70 is urged toward a lock position where the lock bolt 70 is engaged with an engaging recess of a steering shaft (not shown) by an urging force of a lock spring 71 provided between the lock bolt 70 and the cam member 5. In this embodiment, a slider connecting portion 72 protruding in a substantially L shape is provided at the front end portion of the lock bolt 70, and a separate member for interlocking with the rotation of the cam member 5 is provided on the slider connecting portion 72. A slider 74 is provided.

  The slider 74 is disposed in the body 2 so as to straddle the lock member storage portion 15 and the first storage portion 12, and is accommodated together with the lock bolt 70 so as to be slidable along the rotation axis direction of the cylinder 27. Is. An L-shaped connecting portion 75 connected to the slider connecting portion 72 of the lock bolt 70 is provided at the rear end portion of the slider 74. The connecting portion 75 is formed so as to protrude into the body 2 from the side surface portion of the lock bolt 70 in a state of being engaged with the slider connecting portion 72 of the lock bolt 70, and abuts against the stopper portion 16 of the body 2. It is configured as follows. This also serves as a stopper for stopping the advancement at a predetermined position when the lock bolt 70 is in the locked position. Further, at the central portion of the slider 74, with the connecting portion 75 in contact with the stopper portion 16 of the body 2, the tip surface of the slider 74 can be slidably contacted with the cam portion 62 of the cam member 5. A sliding portion 76 that protrudes toward the surface is provided. The slider 74 is provided with a lock portion 77 having a substantially concave cross section extending from the sliding portion 76 toward the lock link 7 side. In FIG. 2A, the lock portion 77 is located above the locking portion 53 of the lock link 7 and is disposed so as to cover the locking portion 53 of the lock link 7 with the body 2. A locking step 78 that can be engaged with the locking portion 53 of the lock link 7 is formed on the rear side of the lock portion 77. As shown in FIG. 4A, the locking step portion 78 is in the unlocked position in which the lock bolt 70 is completely immersed in the body 2 and the key is inserted into the cylinder 27. It is set as the structure engaged with the latching | locking part 53. Further, the end surface on the lock link 7 side of the lock portion 77 is an engagement portion 79 that can be engaged with the blocking member 33 of the cylinder 27. When the lock bolt 70 is in the lock position shown in FIG. 2A, the lock portion 77 has the engagement portion 79 (end surface) of the lock portion 77 located on the rear side of the blocking member 33 of the cylinder 27. In the unlocked position shown in FIG. 4A, the side surface of the lock portion 77 protrudes to the front side that can come into contact with the blocking member 33 of the cylinder 27 in the rotational direction, and as shown in FIG. When the lock bolt 70 is actuated forward by an improper means at the lock position 2 (a), when the engagement portion 79 and the blocking member 33 are engaged, the engagement portion 53 of the lock link 7 The axial length is set so that the engaging step 78 of the slider 74 does not engage.

  The ignition switch 8 is detection means for detecting the rotational position of the cylinder 27 and is disposed at the open end of the second storage portion 13 of the body 2 as shown in FIG. A shaft portion (not shown) of a bevel gear 9 (interlocking member) that meshes with the gear portion 63 of the cam member 5 enters the ignition switch 8 and a switch operation is performed according to the rotation of the bevel gear 9. ing. That is, the ignition switch 8 detects the rotation of the cylinder 27 via the cam member 5 and the bevel gear 9, and stops the engine and all the devices at the LOCK position according to the rotation position of the cylinder 27. In the 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 when the engine is driven, the driving state is maintained and START is started. In the position, the electric circuit is switched to start the engine.

  Next, the operation of the steering lock device 1 having the above configuration will be described.

  First, when the cylinder 27 is in the LOCK position and no key is inserted into the key hole 28 of the cylinder 27, the steering lock device 1 is in the locked state shown in FIG. In the locked state of the steering shaft, the lock bolt 70 is advanced by the urging force of the lock spring 71, and the connecting portion 75 of the slider 74 is in contact with the stopper portion 16 in conjunction therewith. As a result, the front end of the lock bolt 70 protrudes from the lock member housing portion 15 of the body 2 and engages with an engagement recess of a steering shaft (not shown). Further, as shown in FIGS. 2A and 2B, the blocking member 33 protrudes from the flange portion 30 of the cylinder 27 so that the blocking member 33 can be engaged with the engaging portion 79 of the slider 74. In addition, since the outer end portion of the blocking member 33 faces the engaging portion 79 of the slider 74 in the front-rear direction (the operation direction of the slider 74), the lock bolt 70 and the slider 74 are unlocked from the locked position. The movement to the position can be prevented.

  In this LOCK state, when the driver inserts the regular key 81 into the key hole 28, the key detection member 50 operates radially outward in the cylinder 27. When the abutting portion 52 of the lock link 7 is pressed by the operation of the key detecting member 50, the rear end of the lock link 7 rotates clockwise around the shaft portion 51 as a rotation center and abuts against the slider 74, and further locks. The link 7 moves outward against the urging force of the latch release spring 54. Further, the tumbler 29 is immersed in the cylinder 27, and the cylinder 27 becomes rotatable with respect to the cylinder outer 21. In this state, when the cylinder 27 is rotated clockwise, the cam member 5 integrally rotates clockwise.

  When the cylinder 27 is rotated, the blocking member 33 rotates together with the cylinder 27 and rotates to a position where it cannot engage with the engaging portion 79 of the slider 74. As a result, the slider 74 that can be moved to the unlock position further slides the sliding portion 76 of the slider 74 on the cam portion 62 of the cam member 5 when the regular key 81 is further rotated to the ACC position. The slider 74 is moved to the front end face side of the cam portion 62. As a result, as shown in FIG. 4A, when the lock bolt 70 moves integrally forward, it moves to the inside of the body 2, and the lock bolt 70 and the slider 74 are connected to the steering shaft. It moves to the unlock position where it does not engage with the mating recess. When the locking step 78 of the slider 74 and the locking portion 53 of the lock link 7 are brought into corresponding positions by the movement of the slider 74 to the unlock position, the lock link is moved by the urging force of the locking release spring 54. 7 is moved inward, the locking portion 53 of the lock link 7 is engaged with the locking step portion 78 of the slider 74, and the lock bolt 70 and the slider 74 are unlocked until the regular key 81 is removed from the key hole 28. Hold on.

  On the other hand, when the cam member 5 is rotated by the rotation of the cylinder 27, the bevel gear 9 is rotated in a rotation axis direction different from that of the cam member 5 due to the engagement between the gear portion 63 of the cam member 5 and the bevel gear 9. To do. Then, the ignition switch 8 detects the operation of the cylinder 27 by the regular key 81 to the ACC position by the rotation of the bevel gear 9 and outputs it to the main microcomputer of the automobile.

  In this way, when the cylinder 27 is rotated to the ACC position and then the cylinder 27 is further rotated to the ON position and the START position, the cam member 5 and the bevel gear 9 are rotated while the lock bolt 70 is moved. Keep that position without doing. The ignition switch 8 detects the operation of the regular key 81 to the ON position and the START position of the cylinder 27 by the rotation of the bevel gear 9, and outputs it to the main microcomputer of the automobile.

  On the other hand, when the cylinder 27 at the ON position is rotated to the ACC position, the cam member 5 and the bevel gear 9 are rotated in the opposite directions, while the lock bolt 70 is maintained in its position without moving forward. . Then, the ignition switch 8 detects the operation of the cylinder 27 by the regular key 81 to the ACC position by the rotation of the bevel gear 9 and outputs it to the main microcomputer of the automobile.

  When the cylinder 27 is further rotated to the LOCK position, the cam member 5 and the bevel gear 9 are rotated in conjunction with each other. At this time, since the locking portion 53 of the lock link 7 is engaged with the locking step portion 78 of the slider 74, the lock bolt 70 and the slider 74 are biased by the lock spring 71 and the cam portion 62 of the cam member 5. Regardless of the inclination, the unlocked position is maintained without moving forward. Further, the blocking member 33 is moved from the position shown in FIG. 4B to the position shown in FIG. 5 by the rotation of the cylinder 27, and the inclined portion 37 of the blocking member 33 comes into contact with the edge of the side surface of the slider 74. Further, the rotation of the cylinder 27 causes the blocking member 33 to move inward of the cylinder 27 against the urging force of the spring 32 along the inclined surface of the inclined portion 37. When the cylinder 27 is in the LOCK position, as shown in FIGS. 6A and 6B, the outer end of the blocking member 33 is moved to the retracted position where it contacts the upper surface 74 a of the slider 74.

  At this time, the movement of the blocking member 33 from the blocking position to the retracted position is performed by the rotation of the cylinder 27 by the rotation operation of the regular key 81 by the driver (operator), and thus the force that moves the blocking member 33 to the retracted position. It is possible to prevent malfunction such as the blocking member 33 being caught by the wall in the storage hole 31 of the cylinder 27 and not moving inward, and the blocking member 33 can be reliably moved to the retracted position. Also, if the blocking member 33 does not move to the retracted position due to a malfunction, the driver releases the hooking of the blocking member 33 by rotating the regular key 81 several times to prevent the malfunction. It is also possible to avoid it. If the blocking member 33 still does not move to the retracted position, the cylinder 27 cannot be rotated to the LOCK position by the contact between the inclined portion 37 of the blocking member 33 and the edge of the side surface of the slider 74. The driver can determine that there is a failure, and avoid being left in an unlocked state due to the failure.

  When the driver pulls out the regular key 81 from the key hole 28, the key detection member 50 is released from the cylinder 27 by releasing the pressing of the key detection member 50 by the regular key 81 as shown in FIG. It becomes possible to move inside. As a result, the movement restriction of the contact portion 52 of the lock link 7 is released, and the lock link 7 is rotated counterclockwise about the shaft portion 51 by the urging force of the locking release spring 54. As a result, the engagement between the locking portion 53 of the lock link 7 and the locking step portion 78 of the slider 74 is released, so that the lock bolt 70 advances together with the slider 74 by the biasing force of the lock spring 71. Engages in the engaging recess of the steering shaft. Further, the movement of the slider 74 releases the contact between the blocking member 33 and the upper surface 74 a of the slider 74, and the blocking member 33 advances from the cylinder 27 and moves to the blocking position by the urging force of the spring 32. As a result, the steering lock device 1 is locked.

  As described above, in the steering lock device 1 of the embodiment, when the lock bolt 70 and the slider 74 are moved from the unlock position to the lock position by the urging force of the lock spring 71, the operation of retracting the blocking member 33 into the cylinder 27 is performed. Is not done. That is, in the steering lock device 1 of the above embodiment, the slider (hanger) is caught due to the malfunction of the blocking member (pin) as in the conventional steering lock device shown in FIG. 8, and the lock bolt does not move to the lock position. Problems can be prevented.

  When a dummy key 82 other than the regular key 81 is inserted into the key hole 28, as shown in FIG. 7, the tumbler 29 is not immersed in the cylinder 27, and the cylinder 27 remains in a non-rotatable state. To do. Similarly to the case where the regular key 81 is inserted, the key detection member 50 moves radially outward in the cylinder 27, so that the lock link 7 moves against the urging force of the latch release spring 54. .

  In this state, for the purpose of theft or the like, a strong impact is applied to the body 2 with a hammer or the like, and an inertial force is applied to the lock bolt 70 and the slider 74 in the direction of moving to the unlocking side by impact acceleration due to the impact. As shown in FIG. 7, the lock bolt 70 and the slider 74 advance against the urging force of the lock spring 71. However, before the locking portion 53 of the lock link 7 and the stepped portion of the slider 74 are engaged, that is, before the lock bolt 70 and the slider 74 are moved to the unlock position, the blocking member 33 is engaged with the slider 74. Since the lock bolt 70 and the slider 74 are prevented from moving to the unlock position by engaging with the portion 79, the lock bolt 70 is prevented from moving to the unlock position and being held in the unlocked state. As a result, it is possible to reliably prevent theft due to the smashing of the steering lock device 1.

  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 74 is disposed on the lock bolt 70, but the configuration of the slider 74 may be integrally provided on the lock bolt 70. Moreover, in the said embodiment, although the inclined part 37 of the prevention member 33 is made into the semicircle-shaped curved surface, you may comprise an inclined part with a plane.

  Further, in the above embodiment, the inclined member 37 is provided in the blocking member 33 to move the blocking member 33 from the blocking position to the retracted position by the rotation of the cylinder 27, but this inclined portion is provided at the edge of the side surface of the slider 74. May be.

It is a top view of the steering lock device of an embodiment of the present invention. (A) is a longitudinal cross-sectional view of the horizontal direction of FIG. 1, (b) is the sectional view on the AA line (only the principal part) of (a). It is a front view of a cylinder lock. (A) is a longitudinal direction sectional view which shows the state which rotated the regular key to the ACC position, (b) is sectional drawing of the principal part of (a). It is sectional drawing which shows another state of FIG.4 (b). (A) is a longitudinal cross-sectional view which shows the state which rotated the regular key to the LOCK position, (b) is sectional drawing of the principal part of (a). It is a longitudinal direction sectional view showing a state where an impact is applied after inserting a dummy key at the LOCK position. The steering lock apparatus of a prior art example is shown, (a) is a principal part perspective view, (b) is a principal part side view.

Explanation of symbols

  2 ... Body, 5 ... Cam member, 6 ... Lock member, 7 ... Lock link, 27 ... Cylinder, 32 ... Spring, 33 ... Blocking member, 37 ... Inclined part (actuating part), 71 ... lock spring, 79 ... engaging part.

Claims (1)

A cylinder housed rotatably in the body by a key operation, a cam member that rotates integrally with the cylinder in the body by a rotation operation of the cylinder, and advancing and retreating along the rotation axis direction of the cam member The lock spring is attached by the cam member from a locked position where the cam member protrudes outside the body by the urging force of the lock spring and engages with the steering shaft according to the rotation of the cam member. One end portion is in sliding contact with the outer periphery of the cylinder and a lock member that moves into an unlocked position where the engagement with the steering shaft is released against the force and the engagement with the steering shaft is released. When the key is pushed up when the key is inserted, it swings according to the insertion / removal of the key, and the lock member is held in the unlocked state at the other end. A steering lock device comprising: a Klink, and a generally flat plate shape, wherein is housed in the cylinder so that its flat portion is perpendicular to the rotational axis of the cylinder, when the locking member is in the locked position, When the flat portion protrudes from the cylinder so as to be engageable with the lock member and prevents the lock member from moving from the lock position to the unlock position, and when the lock member is in the unlock position, A guide that is in contact with the lock member and moves to the inside of the cylinder, is movable between a retracted position that does not engage with the engaging portion of the lock member, and is provided at the center of the flat portion. while being accommodated without falling off the fixed pin is penetrated into the cylinder bore, the blocking member which is biased toward the radially outer side of the cylinder is provided An operating portion that moves the blocking member from the blocking position to the retracted position when the blocking member abuts against the locking member in response to a rotation operation of the cylinder when the locking member is in the unlocked position. A steering lock device, wherein the blocking member or the lock member is provided.

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