JP2011121496A - Steering lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steering lock device which has excellent unlocking performance, while having high locking holding performance, without being influenced by electrical defect. <P>SOLUTION: In a locking state where a lock member 8 is held in a locking position, a support member 10 is positioned in a support position, and the support member 10 approaches a support object part 8b facing in the rotational direction of a steering shaft 20 of the lock member 8 positioned in a lock position, and supports the lock member 8 arranged in a state along the slide direction, and the support member 10 is displaced to an unsupported position except for the locking state, and separates from the lock member 8, and allows the lock member 8 to fall against a lock storage hole inner wall 31a. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a steering lock device that locks rotation of a steering shaft of an automobile.

  A conventional steering lock device of this type is disclosed in Patent Document 1. As shown in FIG. 17, the steering lock device 100 includes a key lock collar 122, an electric motor 104, a locking rod 108, and a vibration sensor 130.

  The key lock collar 122 covers a part of the steering shaft and can rotate together with the steering shaft. The key lock collar 122 is provided with a groove 121. The rocking rod 108 is provided with a plurality of teeth and meshes with the output gear 142 of the electric motor 104 to reciprocate. The groove 121 of the key lock collar 122 and the end of the locking rod 108 engaged with the groove 121 are formed in a tapered shape that is inclined with respect to the rotation direction of the steering shaft.

  When the steering lock is activated, the locking rod 108 moves in the direction of the key lock collar 122 by rotating the electric motor 104, and the end portion 108 c of the locking rod 108 is engaged with the groove 121. When the locking rod 108 and the groove 121 of the key lock collar 122 are engaged, the locked state where the steering shaft cannot rotate is brought. Conversely, in a state where the locking rod 108 is removed from the groove 121 of the key lock collar 122, the key lock collar 122 and the steering shaft are in an unlocked state that can be rotated.

  By making the groove 121 of the key lock collar 122 and the end portion 108c of the locking rod 108 into a tapered shape, the locking rod 108 is engaged with the groove 121 of the key lock collar 122, that is, the steering lock is activated. In this state, even when a rotational force is applied to the key lock collar 122, when the steering lock is released, a component force acts on the locking rod 108 in the direction (unlocking direction) from the groove 121 so that the locking rod 108 can be easily Can be pulled out.

  However, when the taper angle is increased, when the steering wheel is rotated with a large force, the locking rod 108 may come out of the groove 121 of the key lock collar 122 due to the force in the unlocking direction applied to the locking rod 108. is there. For this reason, in the steering lock device 100 of Patent Document 1, when the vibration sensor 130 detects that a force is applied to the locking rod 108 in the unlocking state in the locked state, torque is generated in the electric motor 104 to lock the locking direction. A pressing force is applied to the rocking rod 108.

JP 2004-230973 A

  However, in the conventional steering lock device 100 described above, since the locking rod 108 is prevented from coming off, the electric motor 104 presses the locking rod 108 in the locking direction when an electrical failure occurs. There was a problem that I could not.

  Therefore, an object of the present invention is to provide a steering lock device having an excellent unlocking performance while having a high locking retention performance without being affected by an electrical failure.

  The invention according to claim 1, which achieves the above object, is inserted into a lock receiving hole formed in the housing so as to be slidable along the radial direction of the steering shaft, and is engaged with an engaging portion provided on the outer periphery of the steering shaft. And a lock member disposed so as to be slidable between a lock position that prevents rotation of the steering shaft and locks the steering, and a lock release position that is spaced apart from the steering shaft and allows rotation of the steering shaft. A steering lock device comprising: a support member that is movably disposed between a support position and a non-support position; and in the locked state in which the lock member is held at the lock position, the support member is in the support position. The lock member positioned at the lock position is supported by the supported portion facing the rotation direction of the steering shaft. The holding member is close and supports the locking member in a state along the sliding direction. Except for the locked state, the supporting member is displaced to the non-supporting position, separated from the locking member, and the locking member Is allowed to fall on the inner wall of the lock receiving hole.

  A second aspect of the present invention is the steering lock device according to the first aspect, wherein the support member moves between a support position and a non-support position by swinging about a rotation shaft. It is a feature.

  A third aspect of the invention is the steering lock device according to the first or second aspect, wherein a distal end portion of the lock member that engages with the engagement portion of the steering shaft is tapered toward the distal end. It is characterized by being formed into a tapered shape.

  According to the invention of claim 1, in the locked state in which the lock member is held at the lock position, the support member positioned at the support position is close to the supported portion of the lock member positioned at the lock position. By supporting the lock member in a state along the sliding direction, it is possible to reliably prevent the steering shaft from rotating without the lock member being rattled, and to have high locking retention performance.

  Further, in a state other than the locked state, the support member is displaced to the non-support position, so that it is separated from the lock member and the lock member is allowed to fall on the inner wall of the lock receiving hole. When the lock member is applied, the lock member falls over the inner wall of the lock receiving hole, and the tip end portion of the lock member is inclined with respect to the engaging portion of the steering shaft, so that the force applied to the lock member in the unlocking position direction Therefore, without requiring an electric assisting force, the locking member can be displaced to the unlocking position without the engagement portion biting into the locking member, and excellent unlocking performance can be provided.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the support member is moved between the support position and the non-support position by swinging about the rotation shaft. Thus, it is possible to provide excellent unlocking performance while providing high locking retention performance without complicating the configuration of the entire apparatus.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, when the lock member falls on the inner wall of the lock receiving hole in a state excluding the locked state, the engagement portion of the steering shaft On the other hand, since the inclination of the tip end portion of the lock member becomes larger, the component force in the lock release position direction becomes larger on the lock member, so that it is possible to provide further excellent unlocking performance.

1 is an exploded perspective view illustrating main components of a steering lock device according to an embodiment of the present invention. 1 is a plan view showing a state where a cover and a circuit board of a steering lock device are removed in a locked state according to an embodiment of the present invention. 1 is a side view showing a state where a cover and a circuit board of a steering lock device are removed in a locked state according to an embodiment of the present invention. It is sectional drawing which shows one Embodiment of this invention and follows the AA line of FIG. 2 in a locked state. It is sectional drawing which shows one Embodiment of this invention and follows the DD line | wire of FIG. 3 in a locked state. It is sectional drawing which shows one Embodiment of this invention and follows the BB line of FIG. 2 in a locked state. It is sectional drawing which shows one Embodiment of this invention and follows the CC line | wire of FIG. 2 in a locked state. It is sectional drawing which shows one Embodiment of this invention and follows the AA line of FIG. 2 in an unlocking start state. It is sectional drawing which shows one Embodiment of this invention and follows the DD line | wire of FIG. 3 in an unlocking start state. It is sectional drawing which shows one Embodiment of this invention and follows the BB line of FIG. 2 in an unlocking start state. It is sectional drawing which shows one Embodiment of this invention and follows the CC line | wire of FIG. 2 in an unlocking start state. It is sectional drawing which shows one Embodiment of this invention and follows the AA line of FIG. 2 in an unlocked state. It is sectional drawing which shows one Embodiment of this invention and follows the DD line | wire of FIG. 3 in an unlocked state. It is sectional drawing which shows one Embodiment of this invention and follows the BB line | wire of FIG. 2 in an unlocked state. It is sectional drawing which shows one Embodiment of this invention and follows the CC line | wire of FIG. 2 in an unlocked state. It is sectional drawing which shows the other aspect of this invention and follows the AA line of FIG. 2 in an unlocking start state. It is a schematic diagram which shows the steering lock apparatus of a prior art example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 15, the steering lock device 1 of the present embodiment includes a cover 2 and a housing 3 that are assembled to each other, and is attached to a steering column device S that houses a steering shaft 20 of an automobile.

  As shown in FIG. 1, the housing 3 has a component housing chamber 3 a that opens toward one side (upper side in FIGS. 1, 3, etc.) and is disposed so as to straddle the steering column device S. It has a pair of leg parts 3b and 3b. The component storage chamber 3a has a motor 4 as a driving source, a worm wheel 5 that rotates in the unlocking direction and the locking direction by driving the motor 4, and the worm wheel 5 that is driven through the worm wheel 5 to be described later. A slide member 6 that slides in a direction perpendicular to the axis, a lock member 8, a hanger member 7 that engages with the slide member 6, a lock member 8, and is connected to the hanger member 7, and the tip is a housing 3 accommodates a lock body 8a that can enter and exit from the bottom surface of 3 and can be fitted to the steering shaft 20, a support member 10 that restricts the fall of the lock body 8a, and a printed circuit board 9 that is disposed above these components. Has been.

  A slide portion 32 and an auxiliary slide portion 33 are provided between the bottom portion of the component housing chamber 3 a and the slide member 6. The slide portion 32 is provided on an arm portion side slide surface 64h provided on the slide member 6 described later, a distal end side engaging projection 64i, a rail receiving portion (not shown), and a bottom portion of the component storage chamber 3a. And a guide groove portion 3c. The auxiliary slide portion 33 includes a base side auxiliary surface 61a provided on the slide member 6, an auxiliary projection 61b, a housing side auxiliary surface 3k provided on the bottom of the component storage chamber 3a, and an auxiliary groove portion 3m. It is configured.

  The guide groove portion 3c is formed to be inclined at a predetermined angle α with respect to an AA line parallel to the axial direction of the steering shaft 20, the arm portion 64 of the slide member 6 is slidably accommodated, and the housing side slide surface 3g. And a guide rail portion 3d and a cover wall 3h. The housing-side slide surface 3g is located at the bottom of the guide groove 3c and is a surface parallel to the axial direction of the steering shaft 20. The guide rail portion 3d is formed on the housing side slide surface 3g along the longitudinal direction of the guide groove portion 3c, and guides the rail receiving portion of the slide member 6.

  The cover wall 3h is set so as to cover the distal end-side engaging protrusion 64i in the entire region including the lock end E1 except for the lock release end E2 in the movement range of the slide member 6. In addition, the notch part which is not covered with the cover wall 3h of the lock release end E2 is set as the front end side guide part 3i so that the front end side engaging protrusion 64i can be inserted.

  The housing side auxiliary surface 3k is set so as to face along the sliding direction of the slide member 6 while intersecting the housing side sliding surface 3g. Further, the auxiliary groove 3m extends along the sliding direction of the slide member 6 on the housing side auxiliary surface 3k. Further, a base-side guide groove 3n that communicates the auxiliary groove 3m and the housing-side auxiliary surface 3k is provided at the unlocking end of the auxiliary groove 3m.

  The housing 3 has a lock receiving hole 31 extending in a direction perpendicular to the axial direction of the steering shaft 20 and penetrating from the bottom of the component receiving chamber 3a to the steering column device S side. 2, the lock main body 8a is configured to include a first long hole 3e into which the lock body 8a is movably inserted, and a second long hole 3f into which a part of the hanger member 7 is movably inserted. The first elongated hole 3e is located on the steering column device S side, has a relatively small cross-sectional area, and extends in a direction perpendicular to the AA line parallel to the axial direction of the steering shaft 20. On the other hand, the second long hole 3 f is located on the component housing chamber 3 a side, has a relatively large cross-sectional area, and extends in a direction perpendicular to the width direction of the hanger member 7. In addition, the support member 10 is disposed to face the first elongated hole 3e at a portion of the lock accommodating wall 31a facing the rotation direction R of the steering shaft 20 on the bottom side of the component accommodating chamber 3a.

  A worm gear 42 that meshes with the worm wheel 5 is fixed to the rotating shaft 41 of the motor 4. As shown in FIG. 1, the worm wheel 5 is provided with a drive gear 51 that rotates integrally with the worm wheel 5.

  As shown in FIG. 1, the slide member 6 includes an arm portion 64 that protrudes from one end of the base portion 61, and a rack portion 65 that extends in the sliding direction at the other end of the base portion 61 and meshes with the drive gear 51. ing. Further, the base 61 is formed with an auxiliary protrusion 61b that protrudes toward the housing auxiliary surface 3k and is set to be slidable in the auxiliary groove 3m on the base auxiliary surface 61a facing the housing auxiliary surface 3k. ing.

  The arm portion 64 is interposed between the root portion 64a and the distal end portion 64b extending in the sliding direction of the slide member 6, and between the root portion 64a and the distal end portion 64b, and is gradually inclined toward the steering shaft 20 toward the distal end side. And an inclined portion 64c (inclined portion on the slide member side). In addition, a rail receiving portion is formed in the arm portion 64 along the longitudinal direction of the arm portion 64 so as to straddle the guide rail portion 3d on the arm portion side slide surface 64h facing the housing side slide surface 3g of the housing 3. Has been. Further, a pair of front end side engaging protrusions 64 i protruding sideways are provided on both side surfaces of the front end portion 64 b of the arm portion 64. Further, on both side surfaces of the arm portion 64, a pair of support side cam portions 64k linked to the support member 10 described later is provided.

  The slide member 6 is slidably disposed between the lock end E1 and the lock release end E2 of the guide rail portion 3d. When the slide member 6 slides, the lock body 8a moves along the inclined portion 64c. As a result, the lock main body 8a is displaced between the lock position P1 where the rotation of the steering shaft 20 is prevented and the lock release position P2 where the rotation of the steering shaft 20 is allowed. A slide-side release portion 64d is formed on the surface of the inclined portion 64c on the cover 2 side, and a slide-side lock portion 64e is formed on the surface of the housing 3 side.

  As shown in FIG. 7, the hanger member 7 has a substantially U-shaped cross section, a base 72 having an inclined receiving portion 71 into which the slide member 6 is inserted, and a bifurcated shape from the lower end of the base 72. It is comprised from a pair of arm parts 73 and 73 which protrude. The width direction of the base portion 72 is arranged in a direction perpendicular to the guide rail portion 3 d, while the width directions of the arm portions 73 and 73 are arranged in parallel with the axial direction of the steering shaft 20. The dimension in the width direction of the inclination receiving part 71 is set slightly larger than the width dimension of the arm part 64 of the slide member 6, and the lock member side release part 71 a ( The lock member 8 side lock release inclined portion) is formed with a lock member side lock portion 71b (lock member 8 side lock inclined portion), and is inclined at the same inclination angle as the inclined portion 64c of the slide member 6. . A lock member side release portion 71a is provided on the edge of the inclined receiving portion 71 on the cover 2 (upper side surface in FIG. 7), and a lock member side lock is provided on an edge on the housing 3 side of the inclined receiving portion 71 (lower side surface in FIG. 7). Each part 71b is formed. In addition, in a state where the lock main body 8 a is positioned at the lock position, the inclined receiving portion 71 is covered with the lock receiving wall 31 (the inner wall of the lock receiving hole 31) constituting the lock receiving hole 31 and embedded in the lock receiving hole 31. As described above, the hanger member 7 and the lock body 8a are set.

  A spring seat projection 79 for receiving one end of the winding spring 78 is formed on the bottom portion between the arm portions 73 and 73.

  As shown in FIGS. 1 and 7, a connecting portion 81 that protrudes in the direction of the hanger member 7 (upward in FIG. 1) is formed at one end of the lock body 8a, and has a substantially convex shape. The connecting portion 81 is formed with a connecting hole 82 formed of a long hole along the direction in which the lock main body 8a slides (the vertical direction in FIGS. 1 and 7). A spring seat hole 85 for receiving the other end of the winding spring 78 is formed at the end of the connecting portion 81 on the cover 2 side (the upper end in FIGS. 1 and 7). Further, the end portion on the steering shaft 20 side, which is the tip portion of the lock body 8a, is formed in a substantially rectangular bar shape with a substantially rectangular cross section. The pair of arm portions 73 and 73 and the connecting portion 81 are connected by inserting the connecting pin 84 through the connecting hole 82 of the connecting portion 81 while penetrating the upper ends of the arm portions 73 and 73. The shaft diameter of the connecting pin 84 is set to a dimension that can move in the connecting hole 82, and the lock main body 8a can be swung, and the lock member 8 can be expanded and contracted.

  As shown in FIGS. 1 and 4, the support member 10 includes two plate-like members 11 and urging means (not shown). Each plate-like member 11 has a flat plate-like support plate portion 11a, a support shaft (rotating shaft) 11b set along the plate surface of the support plate portion 11a, and a linkage projecting from the edge of the support plate portion 11a. The arm part 11c is provided. The plate-like members 11, 11 swing around the support shaft 11 b so as to be movable between the support position and the non-support position so that the first long hole 3 e faces the rotation direction R of the steering shaft 20. The lock receiving wall 31a is disposed so as to face the lock receiving wall 31a. At the support position, the support member 10 comes close to the supported portion 8b of the lock body 8a located at the lock position and faces the rotation direction R of the steering shaft 20, and the lock body 8a is moved in the sliding direction (FIGS. 4 in the vertical direction), and in the non-supporting position, the lock main body 8a is separated from the lock main body 8a and allowed to fall on the lock housing wall 31a of the first long hole 3e. The urging means urges and holds the plate-like member 11 from the non-supporting position side toward the supporting position side.

  Next, the assembly procedure of the steering lock device 1 will be described. First, the plate-like members 11 and 11 are moved to the non-supporting position, and the plate-like members 11 and 11 are disposed at the edge of the first long hole 3e of the component housing chamber 3a. When the plate-like members 11 and 11 are disposed, an urging means is interposed between the component housing chamber 3a and the plate-like members 11 and 11, and the plate-like members 11 and 11 are moved from the non-supporting position side to the support position. Hold the bias toward.

  Next, the winding spring 78 is disposed in the spring seat hole 85 of the lock body 8 a and the spring seat projection 79 of the hanger member 7, and the connecting portion of the lock body 8 a is interposed between the pair of arm portions 73, 73 of the hanger member 7. 81 is inserted and the connecting pin 84 is inserted into the connecting hole 82 of the connecting portion 81 while penetrating the upper ends of the arm portions 73 and 73 to connect the hanger member 7 and the lock body 8a. In this way, the slide member 6, the hanger member 7 and the lock body 8a are assembled and housed in the component housing chamber 3a of the housing 3, and the connecting portion of the lock body 8a and the hanger member 7 is formed in the second long hole 3f of the housing 3. The base 72 of the hanger member 7 is inserted into the second long hole 3f. At the same time, the front-side engaging protrusion 64i is fitted into the guide groove 3c through the front-side guide 3i, and the arm 64 of the slide member 6 is disposed in the guide groove 3c, while the auxiliary protrusion 61b of the base 61 is provided. Is arranged in the auxiliary groove 3m through the base side guide groove 3n.

  Next, the worm wheel 5 is disposed at a predetermined position in the component housing chamber 3 a of the housing 3 to engage the drive gear 51 with the rack portion 65 of the slide member 6, and the motor 4 is disposed in the vicinity of the worm wheel 5. Then, the worm gear 42 of the rotating shaft 41 is engaged with the worm wheel 5. Next, the printed circuit board 9 is arranged in the upper part of the component storage chamber 3a and wiring is performed. After the printed circuit board 9 is screwed in the component storage chamber 3a, the cover 2 is attached to the housing 3 to mount the component storage chamber. Cover 3a.

  After the steering lock device 1 is assembled in this way, the steering lock device 1 is mounted on the steering column device S in a state where the pair of leg portions 3b and 3b straddle the steering column device S.

  Next, the operation of the steering lock device 1 will be described. 2 to 7, when the lock body 8a is locked, the slide member 6 is positioned on the lock end E1 side of the guide rail portion 3d, and the tip end portion 64b and the inclined portion 64c of the slide member 6 are inclined receiving portions of the hanger member 7. 71, the lock main body 8a connected to the hanger member 7 is positioned at the lock position P1, that is, the lock main body 8a protrudes from the bottom surface of the housing 3, and the engagement groove (engagement portion) of the steering shaft 20 21. As a result, the rotation of the steering shaft 20 is prevented, so that the automobile is kept in an unmanageable state.

  In the locked state in which the lock body 8 a is held at the locking position, the linkage arm portion 11 c of the support member 10 is held at the support position by the urging means of the support member 10. Accordingly, the support member 10 comes close to the supported portion 8b of the lock body 8a located at the lock position and faces the rotation direction R of the steering shaft 20, and supports the lock body 8a in a state along the slide direction.

  Next, when the motor 4 is operated in the unlocking direction by the output of the unlocking signal, the rack portion 65 is driven by the drive gear 51 via the rotating shaft 41, the worm gear 42 and the worm wheel 5. The movement in the direction from the lock end E1 side to the lock release end E2 is started along the guide rail portion 3d. Along with this, as shown in FIGS. 8 to 11, the support side cam portion 64k also moves to the lock release end E2 side, whereby the support side cam portion 64k causes the support member 10 to be displaced to the non-support position, The lock body 8a is allowed to fall over the lock housing wall 31a of the first long hole 3e apart from the lock member 8. Then, after the lock body 8a is allowed to fall down, the slide side release portion 64d of the slide member 6 is in contact with and engaged with the lock member side release portion 71a of the hanger member 7 along the inclined portion 64c. As the hanger member 7 moves, the lock body 8a is displaced in a direction away from the steering shaft 20 in conjunction with it.

  Next, when the motor 4 further rotates in the unlocking direction, the unlocked state shown in FIGS. 12 to 15 is obtained, the lock body 8a is retracted into the housing 3 and displaced to the unlock position P2, and the steering shaft 20 is rotated. Because it is allowed, the car is in a maneuverable state.

  Next, when returning to the locked state again by the output of the locking signal, when the worm wheel 5 is rotated in the locking direction by driving the motor 4, the lock body 8a is displaced to the lock position P1 following the slide member 6. At this time, the hanger member 7 and the lock body 8a are urged from the cover 2 side to the steering column device S side by the first winding spring, and the lock body 8a is also urged by the winding spring 78 in the above direction. Yes. Along with this, the hanger member 7 moves along the inclined portion 64c while the slide side lock portion 64e of the slide member 6 is in contact with and engaged with the lock member side lock portion 71b of the hanger member 7, thereby locking. The main body 8a is displaced toward the steering shaft 20 in conjunction with it. As a result, the lock main body 8a is fitted into the engagement groove 21 of the steering shaft 20 and the rotation of the steering shaft 20 is prevented, so that the vehicle cannot be steered. At this time, for example, when the lock body 8a comes into contact with the outer peripheral portion between the engagement grooves 21 instead of the engagement groove 21 of the steering shaft 20, the urging of the winding spring 78 is performed when the steering shaft 20 is rotated thereafter. As a result, the lock main body 8a is fitted into the engagement groove 21 of the steering shaft 20, so that the rotation of the steering shaft 20 is prevented.

  Further, even after the lock body 8a is fitted in the engagement groove 21 of the steering shaft 20, the slide member 6 continues to be displaced to the lock end E1. Then, the slide member 6 continues to be displaced to the lock end E1, whereby the linkage arm portion 11c of the support member 10 is displaced and held at the support position by the urging means of the support member 10. Accordingly, the support member 10 comes close to the supported portion 8b of the lock body 8a located at the lock position and faces the rotation direction R of the steering shaft 20, and supports the lock body 8a in a state along the slide direction.

  As described above, in the present invention, in the locked state in which the lock member 8 is held at the lock position, the plate-like members 11, 11 positioned at the support position are placed on the supported portion 8 b of the lock body 8 a positioned at the lock position. 11 and 11 come close to each other and support the lock main body 8a in a state along the sliding direction, so that the rotation of the steering shaft 20 can be surely prevented without the lock main body 8a being rattled, and high locking retention performance is exhibited. can do.

  In the state excluding the locked state, the plate-like members 11 and 11 are displaced to the non-supporting position, so that they are separated from the lock main body 8a, and the lock main body 8a falls on the lock housing wall 31a of the first long hole 3e. Since this is allowed, when the rotational force of the steering shaft 20 is applied, the lock body 8a falls over the lock housing wall 31a of the first long hole 3e and locks against the engagement groove 21 of the steering shaft 20. Since the tip end portion of the main body 8a is inclined, a component force in the direction of the unlocking position acts on the lock main body 8a, so that the engagement groove 21 is engaged with the lock main body 8a without requiring an electric assisting force. Therefore, the lock body 8a can be displaced to the unlock position, and excellent unlocking performance can be exhibited.

  Furthermore, by swinging around the support shaft 11b, the plate-like members 11 and 11 are configured to move between the support position and the non-support position without complicating the overall configuration of the apparatus. While having high locking retention performance, it can have excellent unlocking performance.

  The configuration for supporting the lock main body 8a to which the support member 10 falls is not limited to the configuration of the present embodiment, and the support member is disposed so as to be movable between the support position and the non-support position. Various configurations can be applied as long as they can sufficiently support the force of falling.

  For example, in the present embodiment, the lock body 8a is first moved to the lock body 8a in an attempt to rotate the steering shaft 20 in a locked state by supporting and supporting the support member 10 so as to be orthogonal to the supported portion 8b of the lock body 8a. When a force that falls is applied to the lock accommodating wall 31a of the long hole 3e, the support member 10 abuts against the housing 3 on the support shaft 11b or the back side 11d of the support shaft 11b, and the lock main body 8a is moved. Although it is configured to support, the support member 10 is set so as to be obliquely close to and supported with respect to the supported portion 8b of the lock body 8a, and abuts the housing 3 with the surface 11e facing the swinging direction. It is good also as a structure which supports the lock main body 8a.

  Moreover, as a structure which supports the lock main body 8a to which the support member 10 falls, other than the structure which can displace between a support position and a non-support position by rotating the support member 10 like this embodiment. Alternatively, the support member may be slid linearly so as to be displaceable between the support position and the non-support position.

  Further, in the present embodiment, the support member 10 is composed of two members, but a member having a U-shaped cross section sandwiches the lock body 8a so that the lock body 8a and the first elongated hole 3e are sandwiched. It is good also as a structure inserted and supported.

  FIG. 16 shows another aspect of this embodiment. In FIG. 16, the same components as those shown in FIGS. 1 to 15 described above are denoted by the same reference numerals and detailed description thereof is omitted.

  The lock main body 8a of the above embodiment is formed in a substantially rectangular bar shape having a substantially rectangular cross section. In this aspect, the front end portion 8c of the lock main body 8a that engages with the engagement groove 21 of the steering shaft 20 faces the front end. The difference is that the taper shape is tapered.

  With this configuration, when the unlocking operation is started and the lock main body 8a falls on the lock housing wall 31a of the first long hole 3e, the lock main body is engaged with the engagement groove 21 of the steering shaft 20. The inclination of the tip portion 8c of 8a becomes larger. Thereby, when the steering shaft 20 is rotated in the locked state, the inclination of the tip end portion 8c engaged with the engagement groove 21 is small, so that the component force applied to the lock body 8a in the unlocking position direction is small and sufficient. The lock holding performance is demonstrated, the unlocking operation is started, and the lock main body 8a falls on the lock housing wall 31a of the first long hole 3e, so that the component force in the lock release position direction applied to the lock main body 8a is reduced. Since it becomes larger, it can be provided with further excellent unlocking performance.

DESCRIPTION OF SYMBOLS 1 ... Steering lock device 3 ... Housing 8a ... Lock body (lock member)
8b ... supported portion 8c ... tip portion 10 ... support member 11b ... support shaft (rotating shaft)
20 ... steering shaft 21 ... engagement groove (engagement part)
31 ... lock accommodation hole 31a ... lock accommodation wall (inner wall of lock accommodation hole)
R: Direction of rotation

Claims (3)

A lock housing hole formed in the housing is slidably inserted along the radial direction of the steering shaft, engages with an engagement portion provided on the outer periphery of the steering shaft, prevents rotation of the steering shaft, and steers A steering lock device comprising a lock member slidably disposed between a lock position for locking and a lock release position spaced apart from the steering shaft and allowing rotation of the steering shaft,
A support member arranged to be movable between a support position and a non-support position;
In the locked state in which the lock member is held at the lock position, the support member is positioned at the support position, and the support member is positioned on the supported portion of the lock member positioned at the lock position and facing the rotation direction of the steering shaft. Are close to each other and support the locking member in a state along the sliding direction,
Except for the locked state, the steering lock device is characterized in that the support member is displaced to the non-support position, separated from the lock member, and allowed to fall on the inner wall of the lock receiving hole. . The steering lock device according to claim 1,
The steering lock device, wherein the support member moves between a support position and a non-support position by swinging about a rotation shaft. The steering lock device according to claim 1 or 2,
A steering lock device, wherein a tip portion of the lock member that engages with the engaging portion of the steering shaft is formed in a tapered shape that tapers toward the tip.

Images