JP4629751B2 - Steering lock device - Google Patents

Description

  The present invention relates to a steering lock device.

  A person who tries to steal the vehicle may remove the housing cover of the electric steering lock device, and the lock bolt may be illegally operated to disengage the steering shaft.

  In order to prevent this theft, Patent Document 1 discloses that when the housing cover is removed, the auxiliary lock member is engaged with the lock bolt by the biasing force of the spring to hold the lock bolt in the locked position. What has been made is disclosed.

However, in this case, if only the rear part of the lock bolt of the housing cover is broken without removing the housing cover, for example, the lock pin may not operate and the lock bolt may be illegally operated from the break hole. there were.
Japanese Patent Laid-Open No. 2002-120695

  An object of the present invention is to provide a steering lock device with an anti-theft function that can cope with destruction of a housing cover.

  As means for solving the above-mentioned problems, a steering lock device of the present invention includes a housing having an opening at one end and a housing cover for closing the opening of the housing, and a lock that engages with a steering shaft therein. A lock bolt movable between the position and the unlocked position where the engagement is released, and from the non-engagement position where the lock position is not engaged with the lock bolt toward the engagement position where the lock bolt is engaged A steering lock device comprising: an auxiliary lock member biased by a biasing force of a biasing member; and a stopper member that engages with the auxiliary lock member and holds the auxiliary lock member in the disengaged position. The stopper member is arranged to be movable between a blocking position where the stopper member is engaged with the auxiliary lock member and an open position where the engagement is released. The engages the stopper member provided with a holding member for holding the stopper member to the blocking position, in which said holding member so as to fall off can mounted to the housing or the inner surface of the housing cover.

  With this configuration, the holding member that engages with the stopper member and holds the stopper member in the blocking position is detachably mounted on the inner surface of the housing or the housing cover so that the stopper member is engaged with the auxiliary lock member. It can arrange | position so that a movement is possible between the open positions from which engagement is cancelled | released. By doing so, the stopper member normally engages with the auxiliary lock member and is held in the non-engagement position where the auxiliary lock member is not engaged with the lock bolt at the lock position. When the steering lock device is broken, the hold member falls off at the inner surface of the housing or the housing cover, and the stopper member cannot be held at the blocking position. As a result, the stopper member moves to an open position where the engagement with the auxiliary lock member is released, and the auxiliary lock member released from the engagement with the stopper member is urged by the urging force of the urging member, Engage with the lock bolt in the locked position.

  Specifically, it is preferable that the hold member is attached to a spring mounting portion that receives the other end side of a spring that abuts one end side against the lock bolt side and biases the lock bolt toward the steering shaft. With this configuration, it is not necessary to newly provide a member for attaching the hold member by attaching the hold member to the spring mounting portion.

  Further, it is preferable that the hold member is constituted by a mounting portion that is mounted by a restoring force on a mounting step portion provided on an inner surface of the housing or the housing cover, and a support portion that engages with the stopper member. With this configuration, the holding member can be attached to the attachment step provided on the inner surface of the housing or the housing cover by a restoring force. In addition, since the hold member has a support portion, it can be engaged with and supported by the stopper member.

  Further, it is preferable that the hold member is contracted by moving the support member when the hold member is detached from the mounting step portion, and the engagement between the support portion and the stopper member is released. With this configuration, once the hold member is removed from the mounting step, the support member moves due to contraction due to the restoring force acting on the hold member, thereby releasing the engagement between the support member and the stopper member. Can be configured to.

  Further, the housing or the housing cover is provided with a receiving portion for supporting the support portion of the hold member, and the support of the hold member is contracted when the hold member is detached from the mounting step portion and the hold member contracts. It is preferable to configure so that the part is moved and the engagement between the support part and the receiving part is released. With this configuration, after the hold member is removed from the mounting step and sufficiently contracted, the engagement between the support portion of the hold member and the receiving portion provided on the housing or the housing cover can be released.

  According to the present invention, by attaching the hold member to the inner surface of the housing or the housing cover so as to be detachable, the hold member is detached from the outside by a destructive operation (for example, drilling with a drill) and the holding of the stopper member is released. Thus, the stopper member and the auxiliary lock member can be operated. Therefore, even when a part of the housing or the housing cover is damaged, the lock bolt can be held in the locked position, and the antitheft can be further improved.

  Further, by further providing a hold member that holds the stopper member, it is possible to improve the degree of freedom in setting the operating point (fixed position of the hold member) of the auxiliary lock mechanism.

  In addition, it effectively acts against an attack that attempts to remove the spring that biases the lock bolt.

  Further, since the holding member is attached to the mounting step provided on the inner surface of the housing cover by a restoring force, the holding member can be easily mounted.

  Further, since the engagement with the stopper member is released by utilizing the contraction caused by the restoring force of the holding member, the stopper member and the auxiliary lock member can be operated more reliably.

  Furthermore, the holding force with respect to the stopper member of a hold member can be enlarged by providing the receiving part which supports the support part of a hold member. Further, since the engagement between the support portion and the receiving portion of the hold member is released using the contraction force of the hold member, the hold member can be more reliably released.

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

  1 to 4 show a steering lock device (hereinafter abbreviated as “lock device”) according to a first embodiment of the present invention. This locking device is disposed around a steering shaft that rotates in response to a steering operation (not shown), and operates in conjunction with a push switch or a card key for starting or stopping an engine or the like. It is. The steering shaft has an engagement recess formed at a predetermined position in the circumferential direction, as in the conventional case.

  The locking device according to the present embodiment includes a housing 10 and a housing cover 11 that are open at one end. Inside the housing, a lock bolt 12, an electric motor 13 that is an actuator, and a transmission mechanism are disposed. An auxiliary lock mechanism for restricting the forward / backward movement of the camera is provided. A control board 14 that controls the electric motor 13 based on the advance position of the lock bolt 12 is disposed.

  As shown in FIGS. 1 and 2, the housing 10 is formed of a rectangular container having an open end, a substrate disposition portion 15 is formed on one side, and a lock mechanism disposition portion 16 is formed on the other side. It is a thing.

  The board arrangement portion 15 is provided with an electric motor 13 and a control board 14 for control, and a recess 17 is formed along the outer shape of the electric motor 13 on the closing surface. Further, the board disposition portion 15 includes a boss 19 for fixing the motor cover 18 for positioning the electric motor 13 by screwing, and a boss 20 for fixing the housing cover 11 by screwing. Is provided. Further, the substrate placement portion 15 is provided with a notch 34 for exposing the electrical connection connector 21 on the side wall located on the opposite side of the lock mechanism placement portion 16.

  The lock mechanism disposing portion 16 disposes the lock bolt 12 and the transmission mechanism, and includes a protruding portion 22 that protrudes in the direction opposite to the opening end. The protrusion 22 is provided with a lock bolt insertion hole 23 that penetrates along the mounting direction of the housing cover 11. Further, in the lock mechanism arrangement portion 16, the lock bolt insertion hole 23 is protruded inward around the lock bolt insertion hole 23 so as to form an annular shape, and a rotating member 24 described later can be rotated. The 1st support convex part 25 to support is provided.

  In the present embodiment, as shown in FIG. 1, the protruding portion 22 of the lock mechanism disposing portion 16 has a through hole 26 that extends in parallel to the lock bolt insertion hole 23 that is the mounting direction of the housing cover 11. Is provided. And in this through-hole 26, the auxiliary | assistant lock unit arrangement | positioning part 29 for inserting and arrange | positioning the auxiliary | assistant lock member 27 in the auxiliary | assistant lock cover 28 is provided in the front-end | tip part of the protrusion part 22 which is a front-end | tip of a cover attachment direction. It is provided so as to be recessed inward from the outer surface side. Further, an auxiliary lock member 27 is inserted into the lock mechanism arrangement portion 16 between the auxiliary lock unit arrangement portion 29 at the tip of the through hole 26 in the cover mounting direction and the lock bolt insertion hole 23 so as to be able to advance and retract. A lock member insertion portion 30 is provided. The auxiliary lock member insertion portion 30 includes a groove provided so as to extend from the tip of the protruding portion 22 toward the bottom of the auxiliary lock unit disposition portion 29. The auxiliary lock unit placement portion 29 is provided with guide grooves 31 so as to be positioned on both sides of the auxiliary lock member insertion portion 30, and further provided with locking grooves 32 on both sides of the guide groove 31. .

  The housing cover 11 closes the opening of the housing 10 and is provided with a screw insertion hole 33 at a position corresponding to the boss 20. The housing cover 11 is provided with a support portion 35 that protrudes from the notch 34 and supports the outer peripheral portion of the connector 21. Further, an annular second support convex portion 36 that rotatably supports the other end of the rotating member 24 is provided at a position corresponding to the first support convex portion 25 of the lock mechanism arrangement portion 16. Lock bolt guide grooves 37 extending along the axial direction are provided at predetermined intervals in the circumferential direction on the inner peripheral surface of the second support convex portion 36. A lock bolt guide groove 37 facing a holding portion 38 (to be described later) of the housing cover 11 is provided with a mounting groove 39 so that an inner wall portion and an outer wall portion of the second support convex portion 36 corresponding to the lock bolt guide groove 37 pass therethrough. It is continuous. In addition, a spring mounting shaft (spring mounting portion) 41 that externally fits and mounts a spring 40 that biases the lock bolt 12 in the advancing direction protrudes from the center of the second support convex portion 36. The spring mounting shaft 41 protrudes from the housing cover 11, has a truncated cone having a columnar mounting step 42 at the base end, and has a shape in which a column is integrally formed coaxially thereon. . Furthermore, a holding portion 38 is provided at a position of the housing cover 11 corresponding to the through hole 26 of the housing 10 as shown in FIGS. The holding portion 38 includes a third support convex portion 45 having a substantially rectangular tube shape having a holding hole 44 for holding an end portion of a stopper member 43, which will be described later, on the housing cover 11 side so as to be movable in the axial direction. ing. The third support protrusion 45 has a groove communicating with the holding hole 44 at a position where a straight line connecting the mounting groove 39 and the holding portion 38 intersects the third support protrusion 45 substantially parallel to the longitudinal direction of the housing cover 11. 46 is provided through both side walls. Further, the inner surface of the housing cover 11 has a width wider than the diameter of a line section of the hold member 47 described later, and continues from the mounting groove 39 of the second support convex part 36 to the groove 46 of the third support convex part 45. A groove 48 is formed. Further, in the housing cover 11, a wall portion 49 located on the inner surface of the outer wall of the lock mechanism arrangement portion 16 is provided at an edge corresponding to the lock mechanism arrangement portion 16.

  As shown in FIGS. 1 to 4, the lock bolt 12 has a quadrangular prism shape that can be inserted into the lock bolt insertion hole 23, and the upper end of the lock bolt 12 is inserted and locked in the engagement recess of the steering shaft. Joint protrusions 50 are provided. The lock bolt 12 is moved to the steering shaft side by the electric motor 13 through the transmission mechanism and is engaged with the engaging recess, and the unlocked position is retracted to release the engagement. Moved to move forward and backward. Further, when the engaging convex portion 50 does not coincide with the engaging concave portion in the circumferential direction, it is urged in the advance direction by the spring 40, and when it coincides, it is advanced and engaged with the urging force. The lock bolt 12 of the present embodiment is configured to be advanced and retracted via a separate cam member 51 that is a driven member, and a mounting convex portion 52 projects from the lower portion to connect the cam member 51. The mounting convex portion 52 has a rectangular cross section, and is provided with a connecting hole 53 over an opposing surface located in a direction orthogonal to the axial direction. In this embodiment, the lock bolt 12 has a concave shape at a position corresponding to the auxiliary lock member insertion portion 30 of the housing 10 in a locked state where the engagement convex portion 50 is engaged with the engagement concave portion of the steering shaft. An engagement receiving portion 54 formed of a notched groove is provided.

  The lower part of the cam member 51 is disposed in the second support protrusion 36 of the housing cover 11, and the upper part of the cam member 51 is substantially cylindrical. On the outer peripheral portion of the lower end of the cam member 51, guide convex portions 55 that are inserted into the lock bolt guide grooves 37 of the second support convex portion 36 project from the circumferential direction with a predetermined interval. In addition, the cam member 51 is provided with a through-hole 56 that passes through the upper and lower ends along the axis that is the forward and backward direction of the lock bolt 12. The through hole 56 has a rectangular shape whose upper part coincides with the mounting convex part 52, and a connecting hole 58 through which the connecting pin 57 passes is provided at a position corresponding to the connecting hole 53. The lower portion of the through hole 56 has a conical shape into which the spring mounting shaft 41 is inserted. The end of the spring 40 is positioned by the end face of the lock bolt 12 attached to the upper part of the through hole 56.

  A pair of cam grooves 59 recessed in a substantially semicircular shape that turns so as to form a spiral shape are provided on the outer peripheral portion of the cam member 51 so as to face each other in the radial direction. The cam groove 59 converts the rotational power of the rotating member 24 into linear motion of the lock bolt 12 through the cam member 51. In the cam groove 59, a predetermined region at one (lower) end is set in advance as a lock region of the steering shaft by the lock bolt 12, and a predetermined region at the other (upper) end is previously set as an unlock region of the steering shaft by the lock bolt 12. Is set. The advance / retreat speed of the lock bolt 12 is set by the inclination angle between the lock area and the unlock area.

  The electric motor 13 is a power source for moving the lock bolt 12, and is arranged on the board arrangement portion 15 of the housing 10 via the motor cover 18. This electric motor 13 is capable of a forward rotation operation for moving the lock bolt 12 forward and a reverse rotation operation for moving the lock bolt 12 backward. The output shaft has a helical tooth extending in the axial direction on the outer peripheral surface. A worm 60, which is a screw gear that forms (not shown), is provided.

  The motor cover 18 is provided with a recess 61 at a position corresponding to the through hole 26 of the housing 10 in the housing cover 11 mounting direction, on the side facing the housing cover 11 when the motor cover 18 is mounted. A through hole 62 having a size that does not interfere with the stopper member 43 is provided on the bottom surface of the concave portion 61, and a spring holding portion 63 having a flange is formed around the through hole 62.

  The transmission mechanism transmits the driving force of the electric motor 13 to the lock bolt 12 via the cam member 51 and moves the lock bolt 12 between the lock position and the unlock position. The cam groove 59 includes a rotating member 24 disposed inside the cam member 51 so that the cam member 51 can advance and retreat, and a cam follower 64 disposed between the rotating member 24 and the cam member 51.

  The rotating member 24 is a cylindrical member having an inner diameter slightly larger than that of the cam member 51 and is supported so as to be rotatable in the circumferential direction without being moved in the axial direction so as to be sandwiched between the housing 10 and the housing cover 11. It is what is done. Specifically, the rotating member 24 is provided with an inner fitting portion 65 fitted to the inner peripheral portion of the first support convex portion 25 at one (upper) end thereof, and with a second support at the other (lower) end thereof. An external fitting portion 66 that fits on the outer peripheral portion of the convex portion 36 is provided. Further, in the state where the inner fitting portion 65 is fitted into the first support convex portion 25, the rotating member 24 protrudes in an L-shaped cross section from the lower portion to the outer peripheral portion of the first support convex portion 25. A worm wheel portion 67 having a plurality of helical teeth (not shown) extending in the axial direction is provided on the portion. As shown in FIG. 5, the worm wheel portion 67 is engaged with the teeth of the worm 60 disposed so as to extend in the tangential direction in the attached state to the housing 10, so that the rotating member 24 is centered on the axis. Rotate. In addition, a fitting groove 68 for fitting the first support convex portion 25 is formed between the worm wheel portion 67 and the inner fitting portion 65. A switch cam groove 69 for detecting the advancing position of the lock bolt 12 via the rotating member 24 is provided at the lower portion of the worm wheel portion 67. Further, on the inner peripheral surface of the rotating member 24, a longitudinal groove 70 recessed in a substantially semicircular shape extending upward in the axial direction from the inner end located above the outer fitting portion 66 is opposed to the radial direction. A pair is provided.

  The cam follower 64 is formed of a spherical steel ball and is disposed in the longitudinal groove 70 of the rotating member 24 as shown in FIG. When the rotating member 24 is rotated in a state in which the portion protruding from the vertical groove 70 is fitted in the cam groove 59 of the cam member 51, the vertical groove 70 is rotated in the circumferential direction. It slides along the cam groove 59 of the cam member 51 that is impossiblely regulated, and the lock bolt 12 is advanced and retracted along the rotational axis of the rotating member 24 via the cam member 51.

  The auxiliary lock mechanism is for restricting the forward and backward movement of the lock bolt 12 in a state in which the housing 10 of the lock device is disassembled (destroyed), thereby preventing unauthorized unlocking. The auxiliary lock mechanism includes an auxiliary lock unit including an auxiliary lock member 27 and an auxiliary lock cover 28, a stopper member 43, a spring 71, and a hold member 47.

  The auxiliary lock member 27 is arranged as an auxiliary lock unit via the auxiliary lock cover 28 in the auxiliary lock unit arrangement portion 29 of the housing 10, engages with the lock bolt 12 at the lock position, and is not operated through the through hole 26. From the possible engagement position, the engagement with the lock bolt 12 is released, and the movable bolt can move to the non-engagement position operable through the through hole 26. As shown in FIGS. 1, 3 and 4, the auxiliary lock member 27 has a substantially U-shaped cross section having a pair of upper and lower frames 27a and 27b extending in the forward / backward direction and a front frame 27c connecting them. It is. The auxiliary lock member 27 has a front frame 27c side in the advance direction, and the front frame 27c is provided with a locking projection 72 that protrudes forward in the advance direction. Further, the front frame 27c of the auxiliary lock member 27 corresponds to the thickness of the lower part of the auxiliary lock member insertion portion 30 formed by the groove of the housing 10 so as to be positioned below the locking projection 72. A notch 73 is provided. Further, the auxiliary lock member 27 is provided with a locked groove portion 75 that is locked to a locking groove portion 74 of a stopper member 43 described later on the lower edge of the lower frame 27b located on the through hole 26 side. The auxiliary lock member 27 is provided with a spring receiving portion 76 that is bent laterally at the bottom of the groove between the upper and lower frames 27a and 27b. The spring receiving portion 76 serves as a stopper whose rear surface in the advancing direction receives the end of the spring 77 and whose front surface in the advancing direction contacts the side portion of the auxiliary lock member insertion portion 30 of the housing 10.

  As shown in FIG. 1, the auxiliary lock cover 28 is for assembling the auxiliary lock member 27 to the housing 10 in a state where the auxiliary lock member 27 can be advanced with respect to the lock bolt 12. As shown in FIGS. 3, 4, and 6, the auxiliary lock cover 28 has a square shape that is larger in plan view than the through hole 26, and includes a first communicating portion 78 that penetrates the through hole 26. ing. As shown in FIG. 1, the first communicating portion 78 includes a locked groove portion 75 that is a part of the auxiliary lock member 27 in a non-engagement position where the auxiliary lock member 27 is not engaged with the lock bolt 12. The lower frame 27b in which is formed is positioned inside so as to be operable through the through hole 26. Further, at the engagement position where the auxiliary lock member 27 is engaged with the lock bolt 12, as shown in FIG. 8B, a part of the auxiliary lock member 27 is located in the first communication portion 78, but the through hole 26 is in an inoperable state. Note that the auxiliary lock member 27 may be configured not to be positioned in the first communication portion 78 by setting the dimensions of the upper and lower frames 27 a and 27 b or setting the dimensions of the first communication portion 78.

  The auxiliary lock cover 28 extends in a direction perpendicular to the penetrating direction of the first communication portion 78 (the tip in the cover mounting direction), and extends from the first communication portion 78 via the auxiliary lock member insertion portion 30 of the housing 10. A second communication portion 79 that communicates with the lock bolt insertion hole 23 and that guides the auxiliary lock member 27 is provided. The second communication portion 79 is configured by a hole having the same rectangular shape as the dimension applied to the upper and lower edges of the upper and lower frames 27 a and 27 b of the auxiliary lock member 27.

  Further, the auxiliary lock cover 28 is provided with a spring arrangement portion 80 that communicates with the first and second communication portions 78 and 79 and biases the auxiliary lock member 27 in the advancing direction to engage the lock bolt 12. It has been. The spring arrangement portion 80 has a rectangular shape slightly larger than the spring receiving portion 76 of the auxiliary lock member 27, and movably accommodates the spring receiving portion 76 that moves forward and backward. Further, a spring mounting portion 81 having a cylindrical shape protrudes from the spring disposition portion 80 so as to be located on the rear side in the biasing direction of the auxiliary lock member 27. A spring (biasing member) 77 that is an urging means disposed in the spring disposing portion 80 is formed with an outer diameter that does not protrude into the communicating first communicating portion 78. Since the spring arrangement portion 80 configured in this manner is provided so as to be adjacent to the direction of the through hole of the first communication portion 78 in a direction orthogonal to the first communication portion 78, the spring arrangement portion 80 is a position that cannot be seen through the through hole 26 at all.

  In the present embodiment, in the auxiliary lock cover 28, the second communication part 79 located on the through hole 26 side with respect to the housing 10 and the opening end of the spring disposition part 80 are in the guide groove 31 of the housing 10. Guide protrusions 82 are provided to project in the mounting direction and to position the mounting state. Further, on both sides of the guide projection 82, elastic locking portions 83 are provided so as to be locked in the locking grooves 32 of the housing 10 and to lock the auxiliary lock cover 28 in the mounted state.

  The stopper member 43 is provided between the auxiliary lock unit disposition portion 29 of the housing 10 and the housing cover 11 so as to pass through the through hole 26 of the housing 10, and engages with the auxiliary lock member 27 to engage with the auxiliary lock member. It is arranged so as to be movable in the axial direction between a blocking position for holding 27 in the non-engagement position and an open position where the engagement with the auxiliary lock member 27 is released. As shown in FIGS. 1 to 4, the stopper member 43 has a columnar shape, and a spring holding portion 84 is provided at a portion of the motor cover 18 located on the housing cover 11 side. The spring holding portion 84 is configured by a flange. The stopper member 43 is chamfered so that the portion located in the through hole 26 in the mounted state has a substantially rectangular cross section, and the protruding dimension of the stopper member 43 is that the front end penetrates the through hole 26 and the front end in the cover mounting direction. It is formed so as to be located in the auxiliary lock unit arrangement portion 29 located at the position. Further, a locking groove 74 is provided on the surface located on the opposite side to the lock bolt insertion hole 23 in the mounted state. An end portion of the stopper member 43 on the housing cover 11 side is held by a holding portion 38 provided on the housing cover 11 and has a substantially rectangular cross section. From the spring holding portion 84 of the stopper member 43 to the end portion on the housing cover 11 side, the columnar shape having the substantially rectangular cross section is configured.

  The spring 71 is provided so as to urge the stopper member 43 away from the auxiliary lock member 27, that is, to bias the stopper member 43 from the blocking position toward the open position. One end of the spring 71 is held by the spring holding portion 63 of the motor cover 18, and the other end is held by the spring holding portion 84 of the stopper member 43.

  The hold member 47 is made of an elastic metal wire and includes a mounting portion 85 and a support portion 86. The mounting portion 85 has an annular shape with a notch (FIG. 7), can be deformed in an expanding direction by expanding from the center, and is released from a deformed state in which the diameter is expanded. It is configured so that the shape returns (shrinks) to the original diameter by the elasticity (restoring force) of the wire. The support portion 86 is positioned in a planar shape that forms an annular portion of the mounting portion 85, a linear portion formed continuously from the end portion of the mounting portion 85, and a position having a predetermined length in the straight portion. The fulcrum part 87 is provided at the fulcrum part 87. First, the fulcrum part 87 is bent in a direction orthogonal to the plane forming the annular portion of the mounting part 85, and is further bent at a predetermined length. And it is comprised so that it may have the edge part extended so that it might become parallel to the said linear part in the direction away from the mounting part 85. FIG. The support portion 86 has a length of each portion so as to engage with the end surface of the stopper member 43 at the blocking position on the housing cover 11 side in a state where the mounting portion 85 is mounted on the mounting step portion 42 of the spring mounting shaft 41. Is set.

  The control board 14 controls the operation of the electric motor 13 and is connected to a micro switch 88 for detecting the advance position of the lock bolt 12 via the rotating member 24 and a main microcomputer (ECU) mounted on the vehicle. A connector 21 for mounting is mounted. The advance position of the lock bolt 12 is such that the lock bolt 12 advances and retreats with the rotation of the rotary member 24. Therefore, when the micro switch 88 is turned on or off by the switch cam groove 69 of the rotary member 24. This can be determined by the on / off state. Further, the connector 21 of the present embodiment is configured not to protrude from the housing 10 in the assembled state. Therefore, it is possible to prevent the electrical component mounted on the control board 14 from being destroyed by applying an impact to the connector 21. In addition, since the connector 21 is depressed in the housing 10, it is possible to improve the assembling workability when the counterpart connector is connected by hand to the lock device attached to the narrow space.

  When assembling the lock device having the above-described configuration, first, the lock bolt 12 and the cam follower 64 that are integrally connected to the rotating member 24 and the cam follower 64 are assembled, and then these are assembled to the lock mechanism disposing portion 16 of the housing 10. (See FIG. 5). Next, after the electric motor 13 is disposed on the housing 10, the motor cover 18 is disposed, and the motor cover 18 is fixed to the housing 10 by screwing. Thereafter, the control board 14 is disposed so as to be located outside the motor cover 18, and the control board 14 is fixed to the housing 10 with screws.

  Further, the spring 77 is disposed in the spring disposition portion 80 of the auxiliary lock cover 28, and the auxiliary lock member 27 is disposed in the second communication portion 79 so that the spring receiving portion 76 is located in the spring disposition portion 80. Insert. The auxiliary lock cover 28 is disposed in the auxiliary lock unit arrangement portion 29 of the housing 10 in a state where the auxiliary lock member 27 is retracted (immersed) into the auxiliary lock cover 28 against the biasing force of the spring 77. To do. The assembly work of the auxiliary lock mechanism may be performed before the rotation member 24, the cam member 51, the lock bolt 12, the cam follower 64, and the electric motor 13 are assembled.

  Finally, the spring 40 is attached to the spring attachment shaft 41, the attachment portion 85 is extended against the restoring force of the attachment portion 85 of the hold member 47, and attached to the attachment step portion 42. 11 is fixed by screwing. At this time, the stopper member 43 is inserted into the through hole 26 of the housing 10, and the locking groove 74 at the tip of the stopper member 43 is passed through the through hole 26. In this state, the auxiliary lock member 27 is in a state in which the locking projection 72 is in contact with the outer surface of the lock bolt 12, and the locked groove portion 75 and the locking groove portion 74 of the auxiliary lock member 27 are: The auxiliary lock member 27 is slightly moved in the advancing direction. Therefore, the auxiliary lock member 27 is slightly moved in the backward direction against the biasing force of the spring 77, and the engaged groove portion 75 of the auxiliary lock member 27 and the engagement groove portion 74 of the stopper member 43 of the housing cover 11 are engaged. The housing cover 11 is mounted in a stopped state.

  As described above, in the locking device of this embodiment, the auxiliary lock member 27 and the spring 77 for preventing unauthorized unlocking due to destruction of the housing cover are assembled as an auxiliary lock unit in a state of being integrally assembled with the auxiliary lock cover 28. Therefore, mounting workability can be improved.

  In the lock device assembled in this way, as shown in FIG. 1, the auxiliary lock member 27 maintains the retracted state against the urging force of the spring 77 by the engagement with the stopper member 43. As a result, the lock bolt 12 moves in the advancing direction for locking with respect to the steering shaft and the retreating direction for unlocking with respect to the steering shaft by driving the electric motor 13 without interfering with the auxiliary lock member 27. can do.

  On the other hand, when the lock bolt 12 shown in FIG. 8A is locked to the steering shaft protruding from the housing 10 and an impact is applied to the vicinity of the spring mounting shaft 41 due to the breakage of the rear portion of the housing cover 11, FIG. ), The mounting portion 85 of the holding member 47 mounted on the mounting step 42 is detached from the mounting step 42, so that the shape of the spring mounting shaft 41 that is formed in a taper shape in the housing cover 11 mounting direction. The diameter of the mounting portion 85 is contracted. As a result, the support portion 86 of the hold member 47 moves in the direction of the spring mounting shaft 41, and the stopper member 43 engaged with the auxiliary lock member 27 in the non-engagement position with respect to the lock bolt 12 can be held. Disappear. As a result, the engagement is released at the release position where the engagement is released between the stopper member 43 and the locked groove portion 75 of the auxiliary lock member 27, and the auxiliary lock member 27 is urged by the biasing force of the spring 77. It advances along the insertion part 30. Then, the locking projection 72 of the auxiliary lock member 27 engages with the locking receiving portion 54 of the lock bolt 12. As a result, for example, even if the lock bolt 12 and the cam member 51 are illegally retracted to the unlocking side against the urging force of the spring 40 from the breaking hole formed by breaking the housing cover 11, The steering shaft cannot be unlocked and cannot be unlocked.

  According to the present invention, the hold member 47 is detachably attached to the inner surface of the housing 10 or the housing cover 11, so that the hold member 47 is dropped from the outside by a destructive operation (for example, drilling with a drill). 43 can be released, and the stopper member 43 and the auxiliary lock member 27 can be operated. Therefore, even when part of the housing cover 11 is damaged, the lock bolt 12 can be held in the locked position, and the antitheft can be further improved.

  Further, by further providing a hold member 47 that holds the stopper member 43, the degree of freedom in setting the operating point of the auxiliary lock mechanism (fixed position of the hold member 47) can be improved.

  In addition, the holding member 47 may be attached to the mounting step 42 provided on the inner surface of the housing cover 11 so as to increase the diameter against the restoring force of the metal wire by the tapered surface of the spring mounting shaft 41. The holding member 47 can be attached.

  Further, the engagement with the stopper member 43 is released simply by detaching from the mounting step portion 42 by utilizing the force that the annular mounting portion 85 of the hold member 47 returns to its original diameter (shrinkage). Therefore, the stopper member 43 and the auxiliary lock member 27 can be operated more reliably.

  In the second embodiment, as shown in FIG. 9, the hold member 47 has a mounting portion 85 and a support portion 86 that have substantially the same shape as the first embodiment, but the mounting portion 85 does not expand and contract. It is. A groove 89 for fitting the mounting portion 85 of the hold member 47 is provided so as to surround the outside of the spring mounting shaft 41 of the housing cover 11. The cross section of the groove 89 is a rectangular cross section that completely accommodates the mounting portion 85 of the hold member 47 and holds the mounting portion 85 with a frictional force that prevents the mounting portion 85 from being detached by the biasing force of the spring 71 of the stopper member 43. The end of the support portion 86 of the hold member 47 may have a length that can hold the stopper member 43 engaged with the auxiliary lock member 27 in the non-engagement position with respect to the lock bolt 12. The groove 48 is provided up to a position that coincides with the holding portion 38. The mounting portion 85 of the hold member 47 that holds the stopper member 43 is fitted and fixed in the groove 89.

  When the mounting portion 85 of the hold member 47 is applied with a force as a force point due to the breakage of the housing cover 11 from behind the spring mounting shaft 41, the mounting portion 85 is detached from the groove 89 and lifted in the housing cover 11 mounting direction. The hold member 47 rotates with the fulcrum part 87 as a fulcrum, and the support part 86 at the action point moves in the direction opposite to the mounting direction of the housing cover 11. As a result, the support portion 86 of the hold member 47 cannot hold the stopper member 43 engaged with the auxiliary lock member 27 in the non-engagement position with respect to the lock bolt 12. The subsequent operation of the auxiliary lock mechanism is the same as in the first embodiment.

  In the third embodiment, as shown in FIG. 10, the hold member 47 has substantially the same shape as the first embodiment, but the receiving portion that receives the support portion 86 of the hold member 47 in the holding portion 38 of the housing cover 11. This is a case where 90 is provided. In the present embodiment, due to the breakage of the housing cover 11 from the rear of the spring mounting shaft 41, a force is applied to the mounting portion 85 of the hold member 47 as a power point, and even when the mounting portion 85 contracts as in the first embodiment. While the support portion 86 is held by the receiving portion 90, the engagement between the stopper member 43 and the hold member 47 is not released. The support portion 86 of the hold member 47 moves in the direction opposite to the mounting direction of the housing cover 11 only after the support portion 86 is not held by the receiving portion 90 due to the shrinkage of the mounting portion 85. The subsequent operation of the auxiliary lock mechanism is the same as in the first and second embodiments.

  By providing the receiving portion 90 that supports the support portion 86 of the hold member 47, the holding force of the hold member 47 with respect to the stopper member 43 can be increased. Further, since the engagement between the support portion 86 of the hold member 47 and the receiving portion 90 is released using the contraction force of the hold member 47, the hold member 47 can be released more reliably. .

  As described above, in the locking device of the present invention, when the rear side of the spring mounting shaft 41 of the housing cover 11 is broken, the auxiliary lock member 27 is unlocked, so that the auxiliary lock member 27 is locked to the lock bolt 12. Is moved from the non-engagement position and engaged. In this engagement position, the lock bolt 12 cannot be retracted, so that the lock position of the steering shaft by the lock bolt 12 can be maintained. As a result, unauthorized unlocking can be reliably prevented.

  When the engagement projection 50 of the lock bolt 12 does not coincide with the engagement recess of the steering shaft when the lock operation is performed by the electric motor 13, the lock receiving portion 54 of the lock bolt 12 and the auxiliary support Since it does not coincide with the locking projection 72 of the lock member 27, the lock bolt 12 cannot be regulated. However, when the steering concave portion of the steering shaft and the engagement convex portion 50 of the lock bolt 12 coincide with each other by rotating the steering, the lock bolt 12 moves by the urging force of the spring 40 and locks against the steering shaft. . As a result, the auxiliary lock member 27 is advanced by the urging force of the spring 77 and locked to the lock bolt 12 as described above.

  Incidentally, in this state, in order to unlock the steering shaft by the locking device, the housing 10 and the locking device must be removed from the steering shaft. However, this locking device is attached so as to be located in the very narrow space where the instrument panel is located on the back side of the steering shaft, that is, the instrument panel. In addition, a so-called threaded bolt that is bolted between a pair of metal plates arranged around the steering shaft and whose head is broken when a predetermined torque is applied to the bolt is used. Therefore, the removal work in such a state is impossible, and the metal plate is also strong and cannot be destroyed. As another method, as described above, there is a method in which the housing cover 11 is removed and the lock bolt 12 is operated, but this method is also impossible due to the engagement of the auxiliary lock member 27.

  Therefore, the method for operating the auxiliary lock member 27 through the through hole 26 remains in order to unlock the lock device of each embodiment illegally. However, as described above, since the locking device is mounted in a very narrow space, it is difficult to easily operate the auxiliary locking member 27 through the through hole 26. Moreover, in the locking device of the present embodiment, the auxiliary lock member 27 is not located in the projection plane facing through the through hole 26 (not visible) at the engagement position where the auxiliary lock member 27 is engaged with the lock bolt 12. Since the operation through the through hole 26 is impossible, the engagement between the auxiliary lock member 27 and the lock bolt 12 is reliably maintained. Therefore, the lock between the lock bolt 12 and the steering shaft can be reliably maintained.

  In addition, since the auxiliary lock cover 28 for assembling the auxiliary lock member 27 includes the first communication portion 78 communicating with the through hole 26, the auxiliary lock cover 28 is confirmed (operated) through the through hole 26. I can't. Moreover, since the spring 77 for biasing the auxiliary lock member 27 to the engagement position is disposed at a position where it cannot be seen through the through hole 26, the spring 77 cannot be removed. Therefore, unauthorized unlocking can be surely prevented.

  Furthermore, the locking device of the present embodiment is provided with a through hole 26 parallel to the lock bolt insertion hole 23, and an auxiliary lock member insertion portion 30 is provided so as to be positioned at the tip of the through hole 26 in the cover mounting direction. Yes. And the 2nd communicating part 79 connected with this auxiliary | assistant lock member insertion part 30 is provided, and the spring 77 for advancing the auxiliary | assistant lock member 27 is arrange | positioned along these extending directions. Therefore, since the second communication portion 79 plays a role of guiding the auxiliary lock member 27, the advance operation of the auxiliary lock member 27 is stabilized. Further, since the structure of the housing 10 can be simplified, the cost can be reduced.

  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 embodiment described above, the separate auxiliary lock cover 28 is provided in order to dispose the auxiliary lock member 27 in the housing 10. In the above embodiment, the separate cam member 51 is connected to the lock bolt 12. However, the cam member 51 may be integrally formed with the lock bolt 12.

  In the embodiment, the lock bolt insertion hole 23 for projecting the lock bolt 12 to the outside is provided on the housing 10 side, and the spring mounting portion 41 for attaching the spring 40 for urging the lock bolt is provided on the housing cover 11 side. However, the present invention is not limited to this, and the lock bolt insertion hole 23 may be provided on the housing cover 11 side and the spring mounting portion 41 may be provided on the housing 10 side. In this case, the hold member 47 may be attached to the spring mounting portion 41 provided in the housing 10.

  Further, the mounting position of the hold member 47 is not limited to the spring mounting portion 41, but may be mounted at an arbitrary position on the inner surface of the housing 10 or the housing cover 11 that is likely to be subjected to a destructive attack.

  Furthermore, in the said embodiment, although the holding member 47 is formed with the metal wire, it is not limited to this, For example, you may form with a resin member.

  In the above embodiment, the one end side of the spring 40 is in direct contact with the lock bolt 12 to urge the lock bolt 12 toward the lock position. However, the present invention is not limited to this. Alternatively, one end of the spring 40 may be brought into contact with the cam member 51 and the lock bolt 12 may be urged together with the cam member 51 toward the lock position.

1 is a sectional view showing a steering lock device according to a first embodiment of the present invention and showing a locked state. It is a disassembled perspective view of a locking device. It is a disassembled perspective view of the locking device seen from another angle. It is a disassembled perspective view of the locking device seen from another angle. It is the perspective view which looked at the locking device which removed the housing cover from the bottom face. It is a disassembled sectional view which shows the structure of an auxiliary | assistant lock mechanism. It is the figure which attached the hold member to the spring attachment axis of a housing cover. The steering lock device concerning a 1st embodiment of the present invention is shown, (A) is a sectional view showing a locked state, (B) shows the state after receiving an impact from the back of the spring mounting axis of a housing cover in the locked state. It is sectional drawing shown. The steering lock device which concerns on 2nd Embodiment of this invention is shown, (A) is sectional drawing which shows a locked state, (B) is the state after receiving the impact from the back of the spring attachment axis | shaft of a housing cover in a locked state. It is sectional drawing shown. The steering lock device which concerns on 3rd Embodiment of this invention is shown, (A) is sectional drawing which shows a locked state, (B) is the state after receiving the impact from the back of the spring attachment axis | shaft of a housing cover in a locked state. It is sectional drawing shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Housing 11 Housing cover 12 Lock bolt 27 Auxiliary lock member 40 Spring 41 Spring mounting shaft 42 Mounting step part 43 Stopper member 47 Hold member 85 Mounting part 86 Support part 90 Receiving part

Claims (4)

A housing having an opening at one end and a housing cover for closing the opening of the housing, and a lock that is movable between a locked position for engaging with the steering shaft and an unlocked position for releasing the engagement. A bolt, an auxiliary lock member biased by a biasing force of a biasing member from a non-engagement position at which the lock position is not engaged with the lock bolt toward an engagement position at which the lock bolt is engaged; In a steering lock device comprising a stopper member that engages with a lock member and holds the auxiliary lock member in the non-engagement position,
The stopper member is movably disposed between a blocking position where the stopper member is engaged with the auxiliary lock member and an open position where the engagement is released, and is engaged with the stopper member so that the stopper member is moved to the blocking position. Provide a holding member to hold,
The hold member includes a mounting portion that is mounted by a restoring force on a mounting step provided on the inner surface of the housing or the housing cover, and a support portion that engages with the stopper member, and the housing or the housing cover A steering lock device, which is detachably mounted on the inner surface of the vehicle.   2. The holding member is attached to a spring mounting portion that receives the other end side of a spring that has one end abutting on the lock bolt side and biases the lock bolt toward the steering shaft. Steering lock device. The hold member is contracted when the hold member is detached from the mounting step portion to move the support portion, and the engagement between the support portion and the stopper member is released. Item 3. The steering lock device according to Item 1 or 2 . The housing or the housing cover is provided with a receiving portion for supporting the support portion of the hold member, and the hold member is removed from the mounting step portion so that the hold member contracts, whereby the support portion of the hold member is The steering lock device according to claim 1 , wherein the steering lock device is configured to be moved to release the engagement between the support portion and the receiving portion.

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