JP5114322B2 - 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. In this steering lock device, a lock bolt is mounted inside a substantially cylindrical housing. Further, a key cylinder is disposed at one end of the housing and an ignition switch is disposed at the other end so as to sandwich the lock bolt.

  Then, when the driver inserts a mechanical key having a mechanical structure into the key hole of the key cylinder and rotates it from the LOCK position toward the START position in order to start the engine, the lock bolt is immersed in the housing, The lock to the steering shaft by the lock bolt is released. On the contrary, when the mechanical key is rotated from the ON position to the LOCK position in order to stop the engine, the lock bolt is advanced from the housing and engaged with the steering shaft to be locked.

  However, in this steering lock device, when the key cylinder is removed due to destruction for the purpose of theft, the lock bolt or the camshaft for operating the lock bolt is exposed. Therefore, there is a problem that when the lock bolt or the camshaft is operated with a special tool, the lock bolt moves to the unlocking side and the steering shaft is unlocked.

Therefore, in Patent Document 1, when the key cylinder is mounted on the housing, the camshaft for operating the lock bolt can be rotated. On the other hand, when the key cylinder is removed from the housing, the camshaft is There is provided a steering lock device provided with a blocking member that cannot be rotated.
Japanese Utility Model Publication No. 4-134773

  However, the steering lock device disclosed in Patent Document 1 has an opening that penetrates inside the outer peripheral portion of the housing, and after the blocking member is mounted from the opening, the opening is closed by a separate lid member. Yes. Therefore, when the blocking member is removed by destroying the lid member, there is a problem that the lock between the steering shaft and the lock bolt is released as in the former case.

  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 the operation of the lock bolt and reliably prevent theft even if the key cylinder is removed due to destruction. To do.

  In order to solve the above problems, a steering lock device according to the present invention is attached to a housing having a cylindrical shape and having a through-hole penetrating from the outside into the outer periphery and a first opening located at one end of the housing. A key cylinder that engages or is integrated with an insertion end of the key cylinder, and rotates integrally within the housing by a rotation operation of the key cylinder. The lock is moved from the lock position that protrudes outward from the through hole and engages with the steering shaft by the rotation of the shaft to the unlock position that enters the inside from the through hole and releases the engagement with the steering shaft. A bolt and a second opening located at the other end of the housing are mounted, and the rotation of the cylinder is a cam. An ignition switch that is transmitted through a shaft and outputs a signal corresponding to the rotation of the cylinder, and is attached to the housing by being biased toward the key cylinder in the housing. In the state, the lock bolt or camshaft is held in a non-engagement position where it is in contact with the key cylinder and does not engage with the lock bolt or camshaft, and is in the lock position with the key cylinder removed from the housing. A blocking member that is moved to an engagement position that holds the lock bolt in the locked position is inserted into the housing, and the blocking member is inserted into the housing from the second opening, and is advanced and retracted toward the key cylinder. A blocking member storage portion that can be stored is provided, and an opening of the blocking member storage portion is formed in the ignition system. It is configured to be closed by the installation of the Deployment switch.

  Specifically, the housing includes a partition wall between the first and second openings, the first insertion hole through which the camshaft is rotatably inserted, and the blocking member can be advanced and retracted. A second insertion hole for insertion is provided.

  According to this steering lock device, since the housing portion of the blocking member is provided so as to be inserted into the housing from the second opening side where the ignition switch is mounted, the blocking member can be operated even if the key cylinder is removed. It is extremely difficult to do. Therefore, since the locking position of the lock bolt can be reliably maintained by the blocking member, an illegal theft can be prevented.

  In this steering lock device, it is preferable that the blocking member has a retaining portion that prevents the blocking member storage portion from slipping out toward the first opening at an end located on the opposite side to the advance direction. If it does in this way, it can prevent removing the blocking member exposed in the state where the key cylinder was removed. Moreover, since the blocking member attached from the second opening can be prevented from falling off during assembly, workability can be improved.

  It is preferable to further provide a hold member that prevents the blocking member from moving backward toward the second opening of the housing in a state where the blocking member has moved to the engagement position. In this way, it is possible to reliably prevent the lock from being released by illegally operating the blocking member exposed with the key cylinder removed.

  In this case, it is preferable that the housing is provided with a hold member storage portion for storing the hold member from the second opening, and the opening of the hold member storage portion is closed by mounting the ignition switch. In this way, it is possible to prevent the holding member from being removed or the blocking member from being released from being blocked by illegally operating the holding member.

  In the steering lock device according to the present invention, since the housing portion for the blocking member is provided on the opposite side of the key cylinder of the housing, the blocking member cannot be operated even if the key cylinder is illegally removed. Therefore, since the lock position of the lock bolt by this blocking member can be reliably maintained, it is possible to reliably prevent theft.

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

  1 and 2A and 2B show a steering lock device (hereinafter abbreviated as “lock device”) according to an embodiment of the present invention. This locking device is disposed in the vicinity of the steering on a steering shaft (not shown) of an automobile. In general, the locking device includes a housing 10, a key cylinder 22 disposed at one end of the housing 10, and a housing 10. A cam shaft 27 and a lock bolt 32 disposed inside, and an ignition switch 38 disposed at the other end of the housing 10 are provided. In the housing 10, a blocking member 40 for blocking the movement of the lock bolt 32 to the unlocked position and the movement of the blocking member 40 to the non-engaged position are blocked on the other end side where the ignition switch 38 is disposed. The holding member 44 is disposed.

  The housing 10 has a substantially cylindrical shape with both ends opened. The housing 10 is provided with a key cylinder 22 in a first opening 11 located on the right side in the figure, and an ignition switch 38 in a second opening 12 located on the left side in the figure. Openings 11 and 12 are closed.

  In the housing 10, an intermediate region excluding the region where the key cylinder 22 and the ignition switch 38 are arranged is a closed partition wall 13. A bulging portion 14 bulging from the outer peripheral portion so as to form a substantially rectangular shape is provided at an intermediate position in the longitudinal direction of the partition wall 13. Further, the partition wall 13 is provided with a lock bolt disposing portion 15 extending from a position facing the bulging portion 14 in the radial direction to the vicinity of the tip of the bulging portion 14. Further, a rectangular through hole 16 that penetrates from the outside to the inside of the lock bolt disposing portion 15 is provided at the distal end surface of the bulging portion 14. Further, as shown in FIGS. 2A and 3A, the partition wall 13 is provided with a camshaft disposing portion 17 penetrating from the first opening 11 side to the lock bolt disposing portion 15. ing. Further, as shown in FIGS. 2 (A) and 3 (B), the partition wall 13 penetrates from the lock bolt disposing portion 15 toward the second opening 12 and is connected to the connecting shaft of the camshaft 27. A first insertion hole 18 through which 31 is rotatably inserted is provided.

  The housing 10 is provided with a storage portion 19 for storing the blocking member 40 and the hold member 44 from the second opening 12. The storage portion 19 is provided so as to be positioned on the substantially opposite side in the radial direction with respect to the opening of the lock bolt disposing portion 15. The storage portion 19 is provided so that the side surface (near the inner peripheral surface of the housing 10) of the partition wall 13 in the second opening portion 12 is recessed toward the first opening portion 11, and in this embodiment, As shown in FIG. 3 (B), a blocking member storage portion 19a having a circular shape and a hold member storage portion 19b having a rectangular shape are integrally provided. Among them, the blocking member storage portion 19a stores the blocking member 40 so as to be able to advance and retract toward the key cylinder 22, and the partition wall 13 passes through the lock bolt mounting portion 15 and the key cylinder 22 is disposed. A second insertion hole 20 extending to the first opening 11 side is provided. The second insertion hole 20 has a stepped portion 20a facing the second opening 12 side by reducing the size of the inner diameter at a position corresponding to the lock bolt disposing portion 15. Further, the hold member storage portion 19b is disposed by urging the hold member 44 toward the blocking member 40 disposed in the blocking member storage portion 19a. In this embodiment, as shown in FIGS. 1 and 2A, the storage portion 19 is configured to be closed by screwing with a separate lid member 21.

  The key cylinder 22 is inserted through the first opening 11 of the housing 10 and is mounted so as to close the right side portion of the housing 10. The key cylinder 22 includes an outer cylinder 23 that is non-rotatably fixed to the housing 10, and an inner cylinder 24 that is rotatably mounted in the outer cylinder 23. The inner cylinder 24 is provided with a key hole (not shown) extending in the axial direction. A plurality of tumblers (not shown) are mounted so as to be movable in the radial direction. When the mechanical key is not inserted into the key hole, one end of the tumbler projects from the outer peripheral portion of the inner cylinder 24 and engages with an engaging groove (not shown) provided on the inner peripheral surface of the outer cylinder 23. The inner cylinder 24 maintains a state in which it cannot rotate with respect to the outer cylinder 23. On the other hand, the inner cylinder 24 can be rotated with respect to the outer cylinder 23 by inserting a mechanical key into the key hole and immersing the tumbler inside the inner cylinder 24. Note that a flange portion 25 is provided at the insertion end of the inner cylinder 24 to prevent detachment from the outer cylinder 23 toward the first opening portion 11 side. Further, a connecting portion 26 having a rectangular shape for engaging with the camshaft is projected from the center of the flange portion 25.

  The camshaft 27 is disposed so as to be positioned in the camshaft disposition portion 17 from the first opening 11 side with respect to the housing 10 in a state of being connected to the key cylinder 22. The cam shaft 27 is provided with a connected portion 30 connected to the connecting portion 26 of the inner cylinder 24 at one end of the cam portion 28, and a connecting shaft 31 connected to an ignition switch 38 at the other end of the cam portion 28. It is installed. The cam portion 28 has a cylindrical shape, and a cam groove 29 for moving the lock bolt 32 forward and backward with respect to the housing 10 is formed on the surface on the insertion end side where the lock bolt 32 is located. The coupled portion 30 has a rectangular engagement hole, and can be rotated integrally within the housing 10 by a rotation operation of the key cylinder 22. The connecting shaft 31 has a rod shape, is inserted through the first insertion hole 18 and protrudes from the partition wall 13 toward the second opening 12 side.

  The lock bolt 32 has a rectangular block shape. The lock bolt 32 is inserted into the lock bolt mounting portion 15 of the housing 10 from the lock position protruding to the outside through the through hole 16. It is arranged so as to be movable toward the lock position. Specifically, the lock bolt 32 is attached to the lock bolt disposition portion 15 of the housing 10 from the outside in the radial direction, and the opening end thereof is blocked by the cover 33 so as not to be detached. Further, the lock bolt 32 is integrally provided with a slider 34 that moves forward and backward in conjunction with the rotation of the key cylinder 22 via the camshaft 27. The slider 34 is composed of a rectangular frame projecting downward from the lock bolt 32 in order to penetrate the connecting shaft 31 of the camshaft 27. An engagement protrusion 35 that protrudes toward the camshaft 27 and engages with the cam groove 29 is provided on the lower end frame of the slider 34. A first spring 36 is disposed between the lower end frame of the slider 34 and the cover 33 as a biasing unit that biases the lock bolt 32 in the advance direction. The lock bolt 32 of the present embodiment is provided with an engagement portion 37 formed of a groove that coincides with the second insertion hole 20 in the longitudinal direction at the lock position protruding from the through hole 16 on one side frame. .

  The ignition switch 38 is inserted into the housing 10 through the second opening 12 and is mounted (fixed) so as to close the left side portion of the housing 10. The ignition switch 38 includes a connection hole 39 that is connected to the connection shaft 31 of the camshaft 27. The rotation of the cylinder is detected via the camshaft 27 and a signal corresponding to the switch operation is output.

  The blocking member 40 is inserted and attached to the storage portion 19 of the housing 10 from the second opening 12 side. The blocking member 40 includes an insertion portion 41 that passes through the second insertion hole 20 and extends toward the first opening 11, and a blocking portion that is located at the end of the insertion portion 41 opposite to the advance direction. 42 and a substantially T-shape. The blocking member 40 is provided with a second spring 43 as a biasing means between the retaining portion 42 and the lid member 21, and is arranged on the first opening 11 side by the biasing force of the second spring 43. It is biased toward the key cylinder 22 provided. The outer side of the lid member 21 is further closed by an ignition switch 38.

  The insertion portion 41 is in a state in which the distal end penetrating the second insertion hole 20 is in contact with the end surface of the outer cylinder 23 of the key cylinder 22 disposed in the housing 10, and the retaining portion 42 is engaged with the lock bolt 32. The dimension is set so as to be positioned closer to the second opening 12 than the portion 37. The retaining portion 42 has a rectangular shape that is larger in the lateral direction than the insertion portion 41, and prevents the retaining portion 42 from coming out toward the first opening portion 11 by engaging with the stepped portion 20 a. Further, the retaining portion 42 is formed by the first spring 43 by the urging force of the second spring 43 when the key cylinder 22 is not attached to the housing 10 and the lock bolt 32 is moved to the lock position. 11 is advanced to contact the stepped portion 20a and engage with the engaging portion 37 of the lock bolt 32 to prevent the lock bolt 32 from moving to the unlocked position and hold it in the locked position. It is said.

  The holding member 44 prevents the blocking member 40 from moving backward toward the second opening 12 of the housing 10 in a state where the blocking member 40 has moved to the engagement position with respect to the lock bolt 32. The hold member 44 is formed of a rectangular plate, and a third spring 45 serving as a biasing unit is disposed between the storage unit 19 and the end surface located on the opposite side of the blocking member storage unit 19a. Thus, the third spring 45 is biased toward the blocking member 40 by the biasing force of the third spring 45. In the state where the blocking member 40 is located at the non-engagement position with respect to the lock bolt 32, the non-moving position with respect to the blocking member 40 is maintained by contacting the retaining portion 42 of the blocking member 40. On the other hand, in a state where the blocking member 40 is moved to the engagement position with respect to the lock bolt 32, the contact between the holding member 44 and the blocking portion 42 of the blocking member 40 is released by the advancement of the blocking portion 42 of the blocking member 40. The hold member 44 is moved by the urging force of the third spring 45 to block the retracting direction of the retaining portion 42 and prevent the blocking member 40 itself from retracting.

  When assembling the lock device having the above-described configuration, for example, first, the lock bolt 32 is inserted into the lock bolt disposing portion 15 of the housing 10, the first spring 36 is disposed, and the opening portion of the lock bolt disposing portion 15 is opened. Is closed by the cover 33. Next, the key cylinder 22 to which the camshaft 27 is connected is attached to the housing 10 from the first opening 11 side so that the connecting shaft 31 passes through the first insertion hole 18. Thereafter, the blocking member 40 is attached to the housing 10 from the second opening 12 side so that the insertion portion 41 penetrates the second insertion hole 20. At this time, in the present embodiment, since the retaining portion 42 is provided at the rear end of the blocking member 40, the blocking member 40 can be removed from the second insertion hole 20 even if the assembly work is performed downward so as to move by its own weight. Never fall out. Therefore, even if it is a small part, the assembly workability | operativity is very favorable.

  Next, the hold member 44 is disposed so as to contact the retaining portion 42 that protrudes from the end face of the lock bolt 32 toward the second opening 12, and the third spring 45 is disposed. Then, with the second spring 43 disposed on the blocking member 40, the opening of the storage unit 19 is closed by the lid member 21. Finally, the ignition switch 38 is mounted on the second opening 12 side with respect to the housing 10.

  In the normal use state in which the key cylinder 22 is mounted on the housing 10, the locking device is configured such that the tip of the insertion portion 41 of the blocking member 40 is connected to the key cylinder as shown in FIGS. 4 (A) and 5 (A). 22 is in contact with the end face of the outer cylinder 23. As a result, the blocking member 40 maintains a state where the blocking member 40 has moved to the disengaged position retracted against the urging force of the second spring 43. Therefore, the retaining portion 42 of the blocking member 40 maintains a state of being separated rearward from the engaging portion 37 of the lock bolt 32. As a result, the lock bolt 32 is movable from the lock position that has advanced from the through hole 16 to the unlock position that has been immersed in the through hole 16.

  When the user inserts a mechanical key into the key cylinder 22 in this normal use state, the inner cylinder 24 is in a state of being rotatable with respect to the outer cylinder 23. In this state, for example, when the engine is rotated from the LOCK position toward the START position in order to start the engine, the inner cylinder 24 and the camshaft 27 rotate integrally. As a result, the lock bolt 32 in the locked state shown in FIGS. 2A and 2B enters the housing 10 against the urging force of the first spring 36, and the lock to the steering shaft by the lock bolt 32 is released. Is done.

  Conversely, when the mechanical key is rotated from the ON position to the LOCK position in order to stop the engine, the lock bolt 32 can be advanced from the through hole 16 via the cam shaft 27. When the lock groove of the steering shaft coincides with the radially outer side of the through hole 16, the lock bolt 32 advances and engages with the lock groove. Further, when the lock groove does not coincide with the radially outer side of the through hole 16, the state in which the tip of the lock bolt 32 is in contact with the outer peripheral surface of the steering shaft is maintained by the urging force of the first spring 36. When the lock groove is positioned on the outer peripheral portion by the rotation of the steering, the lock bolt 32 is advanced and engaged with the lock groove by the urging force of the first spring 36.

  On the other hand, in an emergency state in which the key cylinder 22 is removed from the housing 10 for the purpose of car theft, as shown in FIGS. 4 (B) and 5 (B), the tip of the insertion portion 41 of the blocking member 40 is restricted. Disappears. When the lock bolt 32 is moved to the lock position, the blocking member 40 is advanced by the urging force of the second spring 43. This advancement stops when the retaining portion 42 of the blocking member 40 abuts on the stepped portion 20a of the second insertion hole 20. In this state, the retaining portion 42 of the blocking member 40 engages with the engaging portion 37 of the lock bolt 32. Then, the restriction of the hold member 44 is released in conjunction with it, and the hold member 44 moves to the rear end of the blocking member 40 by the urging force of the third spring 45.

  When the lock bolt 32 cannot move to the lock position because the lock groove is not located on the radially outer side of the through hole 16, the retaining portion 42 of the blocking member 40 contacts the slider 34 of the lock bolt 32. Therefore, the blocking member 40 does not advance to the engagement position. However, in this state, when the lock groove is positioned outside the through-hole 16 by rotating the steering, the lock bolt 32 moves to the lock position, and the blocking member 40 subsequently advances to the engagement position. The hold member 44 moves to the movement position.

  In the state where the blocking member 40 is moved to the engagement position, as shown in FIG. 2B, the lock bolt 32 is retracted by the engagement of the retaining portion 42 and the engagement portion 37. I can't move. Therefore, the lock bolt 32 can be reliably held at the lock position.

  Further, in this state, as shown in FIG. 3A, when facing the inside of the first opening 11 from which the key cylinder 22 has been removed, the tip of the insertion portion 41 of the blocking member 40 is exposed.

  However, in this embodiment, since the blocking member 42 is provided with the retaining portion 42, even if the blocking member 40 is operated to be pulled out toward the first opening 11, it cannot be removed illegally. Even when the blocking member 40 is pushed toward the second opening 12 so as to return to the non-engagement position, the holding member 44 is located at the rear end of the blocking member 40. It is impossible to release the engagement with the lock bolt 32 by improperly pushing 40. Of course, even if the cover 33 assembled with the lock bolt 32 is broken and the lock bolt 32 is exposed, the storage portion 19 is provided on the opposite side of the opening, so that the blocking member 40 and the hold member 44 are provided. Cannot be operated. In this state, even if the lock bolt 32 is pulled so as to be moved to the unlock position, the blocking member 40 is engaged with the lock bolt 32 and cannot be moved to the unlock position.

  Furthermore, since the lid member 21 of the storage unit 19 in which the blocking member 40 and the hold member 44 are stored is closed by fixing the ignition switch 38 to the second opening 12, the lid member 21 is operated directly from the outside. It will never be done. That is, since the lid member 21 cannot be broken from the outside, unauthorized operation of the blocking member 40 and the holding member 44 can be blocked.

  As described above, in the locking device of the present invention, the storage portion 19 of the blocking member 40 for blocking the movement of the lock bolt 32 from the locked position to the unlocked position is mounted on the second portion in which the ignition switch 38 in the housing 10 is mounted. Since it is provided so as to be inserted from the opening 12 side, it is extremely difficult to operate the blocking member 40 even if the key cylinder 22 is removed. Even if the exposed blocking member 40 is illegally operated, the engagement between the blocking member 40 and the lock bolt 32 cannot be released by the retaining portion 42 and the holding member 44. Therefore, illegal theft can be reliably prevented.

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

  For example, in the above-described embodiment, the blocking member 40 is engaged with the lock bolt 32 and held at the lock position. However, the cam shaft 27 that moves the lock bolt 32 forward and backward is provided with the engaging portion 37, and the cam It is good also as a structure which hold | maintains the lock volt | bolt 32 in a locked position by preventing rotation of the shaft 27.

It is a disassembled perspective view which shows the steering lock apparatus of this invention. (A), (B) is principal part sectional drawing of the steering lock apparatus of an assembly state. The state which removed the key cylinder and the ignition switch from the housing is shown, (A) is the side view seen from the 1st opening side, (B) is the side view seen from the 2nd opening side. (A) is principal part sectional drawing which shows the normal use state with which the key cylinder was mounted | worn, (B) is principal part sectional drawing which shows the emergency state which removed the key cylinder. (A) is a perspective view which shows the state of FIG. 4 (A), (B) is a perspective view which shows the state of FIG. 4 (B).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Housing 11 ... 1st opening part 12 ... 2nd opening part 13 ... Partition wall 16 ... Through-hole 18 ... 1st insertion hole 19 ... Storage part 19a ... Blocking member storage part 19b ... Hold member storage part 20 ... 2nd insertion Hole 21 ... Lid member 22 ... Key cylinder 27 ... Camshaft 32 ... Lock bolt 37 ... Engagement portion 38 ... Ignition switch 40 ... Blocking member 41 ... Insertion portion 42 ... Stopping portion 44 ... Hold member

Claims (5)

A housing having a cylindrical shape and having a through-hole penetrating from the outside to the inside at the outer periphery;
A key cylinder attached to a first opening located at one end of the housing;
A camshaft that is engaged with or integrally formed with the insertion end of the key cylinder, and that rotates integrally within the housing by a rotation operation of the key cylinder;
Mounted inside the housing, and with the rotation of the camshaft, the lock shaft protrudes outward from the through hole and engages with the steering shaft, and enters the inside through the through hole to release the engagement with the steering shaft. A lock bolt that is moved to an unlocked position,
An ignition switch that is mounted in a second opening located at the other end of the housing and that transmits rotation of the cylinder via a camshaft and outputs a signal corresponding to rotation of the cylinder;
In the steering lock device with
Urged toward the key cylinder in the housing, and held in a non-engagement position where the lock bolt or the camshaft is not engaged with the key cylinder when the key cylinder is attached to the housing. A blocking member that is engaged with the lock bolt or the camshaft in the locked position with the key cylinder removed from the housing and is moved to the engaged position that holds the lock bolt in the locked position;
The housing is provided with a blocking member storage portion for inserting the blocking member from the second opening portion and storing the blocking member so as to be able to advance and retreat toward the key cylinder, and the opening portion of the blocking member storage portion is mounted by mounting the ignition switch. A steering lock device characterized by being closed.   The housing includes a partition wall between the first and second openings, a first insertion hole through which the camshaft is rotatably inserted, and a second insertion through which the blocking member is inserted so as to advance and retract. The steering lock device according to claim 1, wherein a hole is provided.   2. The blocking member according to claim 1, wherein the blocking member has a retaining portion that prevents the blocking member storage portion from slipping out toward the first opening at an end located on the opposite side of the advance direction. Item 3. The steering lock device according to Item 2.   4. A holding member for preventing the blocking member from moving backward toward the second opening of the housing in a state where the blocking member is moved to the engagement position. The steering lock device according to any one of the above.   5. The housing is provided with a hold member storage portion for storing the hold member from a second opening portion, and the opening portion of the hold member storage portion is closed by mounting the ignition switch. A steering lock device according to claim 1.

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