JP5175698B2 - Steering lock device - Google Patents

Description

  The present invention relates to a steering lock device that prevents 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. 16, the steering lock device 100 includes a housing 101, a spindle driving unit 103 that is disposed in the housing 101 and driven by an electric motor 102, and a steering shaft 104 that has a tip that enters and exits from the bottom surface of the housing 101. And a locking member 105 that can be engaged with the locking member 105. The spindle drive unit 103 has a threaded spindle 106, and the lock member 105 is biased in the axial direction by the threaded spindle 106 via the spring member 107.

In the above configuration, when the spindle drive unit 103 is operated in the unlocking direction by driving the electric motor 102 in the unlocked state shown in FIG. 16, the lock member 105 is urged in the axial direction by the threaded spindle 106 via the spring member 107. Then, since the lock member 105 is displaced from the unlocked position to the locked position and engages with the steering shaft 104, the rotation of the steering shaft 104 is prevented and the automobile cannot be operated. When the spindle driving unit 103 is operated in the locking direction by driving the electric motor 102 in the unlocked state, the urging of the lock member 105 by the threaded spindle 106 is released, and the lock member 105 is moved from the locked position to the unlocked position. Since the engagement with the steering shaft 104 is released by the displacement, the rotation of the steering shaft 104 becomes free, and the automobile is in a steerable state.
JP 2000-233717 A

  However, in the conventional steering lock device 100, when a force is applied to rotate the steering shaft 104 at the time of locking, the rotational force of the steering shaft 104 acts on the engaging portion with the lock member 105. In order to release the lock member 105, it is necessary to pull the lock member 105 with a large force, and there is a problem that the electric motor 102, the spindle drive unit 103, and the like are increased in size and cost is increased.

  Therefore, the present invention provides a steering lock device that can release the engagement state of the lock member with the steering shaft with a relatively small force, and can reduce the size of the drive source and the power transmission mechanism for driving the lock member. For the purpose.

  The invention according to claim 1 which achieves the above object is provided so as to be slidable between a locking position and an unlocking position set in a hanger receiving hole provided in the housing without any gap, and in a moving direction inside. And a hanger member having a rocking restricting portion having a tubular shape along the lock restricting portion, a lock accommodating chamber formed in the rocking restricting portion, and a clearance between the lock accommodating chamber and the tip. And an engagement portion whose shape is set so as to be slidable in the cylinder direction, an arm portion extending from the proximal end side of the engagement portion, and a long hole formed along the arm portion. A lock member that is supported by the support shaft disposed in the swing restricting portion while penetrating the long hole so as to be swingable within the cylindrical shape of the swing restricting portion, and the lock accommodating chamber together with the lock member The locking member is disposed between the hanger member and the locking member. Biasing means for biasing and holding in a direction away from the girder member. In the unlocked state, the engagement portion is moved by the biasing means while the hanger member is separated from the steering shaft in the unlocked position. The lock member is supported so as to be swingable with respect to the hanger member while being separated from the steering shaft in a state of projecting out of the lock storage chamber. In the locked state, the hanger member is in the locked position. While approaching the steering shaft, the engaging portion moves into the lock accommodating chamber by opposing the urging force of the urging means while the tip of the engaging portion abuts on the steering shaft, The swing restricting portion restricts the swing of the lock member, and when the transition from the locked state to the unlocked state occurs, the hanger member is separated from the steering shaft, and the biasing force of the biasing means is applied. Thus, when the lock member protrudes from the lock housing chamber and the engagement protrusion formed on the outer periphery of the steering shaft is engaged with the engagement portion, the lock member swings. Then, the engaging force from the engaging protrusion is released.

  A second aspect of the present invention is the steering lock device according to the first aspect, and is substantially composed of two side plate portions facing each other along the inner wall of the lock housing chamber, and a bottom plate portion connecting the end portions of the side plate portions. A block member having a U-shape and the side plate portion slidably formed in the lock housing chamber without any gap, the block member being disposed between the urging means and the lock member. While holding one end of the urging means with the pressure receiving part set inside the substantially U-shape, the abutting part set outside the substantially U-shape of the bottom plate part is arranged to abut against the lock member. The block member is not oscillated and only the lock member is oscillated when the state is shifted from the locked state to the unlocked state.

  A third aspect of the invention is the steering lock device according to the first or second aspect, wherein the engaging portion of the lock member is formed in a substantially rectangular parallelepiped shape.

  A fourth aspect of the present invention is the steering lock device according to the first or second aspect, wherein the engagement portion of the lock member is substantially wedged by an inclined surface set obliquely with respect to the engagement protrusion. It is formed in a shape.

  According to the first aspect of the invention, in the locked state, the hanger member approaches the steering shaft, and the front end of the engaging portion is in contact with the steering shaft and is opposed to the urging force of the urging means. The portion is located in the lock accommodating chamber, and the swing of the lock member is restricted by the swing restricting portion. Further, when shifting from the locked state to the unlocked state, the hanger member is separated from the steering shaft, and the locking member protrudes from the lock housing chamber by the urging force of the urging means, and is further formed on the outer periphery of the steering shaft. When the mating protrusion and the engaging part are engaged, the input torque transmitted from the steering shaft to the lock member is reduced because the lock member swings to release the input torque from the engagement protrusion. Is done. In the unlocked state, the hanger member is separated from the steering shaft at the unlocked position, and the locking member is separated from the steering shaft while the engaging portion is projected out of the lock housing chamber by the biasing means. The hanger member is swingably supported and completely unlocked.

  As a result, in the locked state, the lock member is prevented from swinging, and the lock member and the steering shaft are reliably engaged, and the engagement state of the lock member with the steering shaft is released with a relatively small force. Therefore, the drive source for driving the lock member and the power transmission mechanism can be reduced in size, and the cost can be reduced.

  In addition, by urging and holding the lock member in a direction away from the hanger member by the urging force of the urging means, the lock member moves toward the steering shaft without swinging when locking from the unlocked state. The member can be reliably engaged with the steering shaft.

  According to the invention of claim 2, while the block member holds the one end of the urging means between the urging means and the lock member with the pressure receiving portion set on the substantially U-shaped inner side of the bottom plate portion, Since the abutting portion set outside the substantially U-shaped portion is arranged to abut against the lock member, one end of the urging means oscillates even when the lock member oscillates. Therefore, the urging force can be transmitted to the lock member. As a result, when the lock member swings, the end of the urging means follows the lock member, so that the urging means is not likely to drop off, and the urging force can be reliably transmitted to the lock member.

  According to the invention of claim 3, when the lock member is engaged with the steering shaft in the locked state, even if the rotational force of the steering shaft acts on the lock member, the tip of the engaging portion is formed in a substantially rectangular parallelepiped shape. Therefore, the lock member can be brought into contact with the steering shaft in a more stable state.

  According to the invention of claim 4, since the engaging portion is formed in a substantially wedge shape, the engaging portion is easily engaged with the engaging protrusion on the outer periphery of the steering shaft when locking from the unlocked state. be able to. Further, when the hanger member moves from the locking position to the unlocking direction, the rotational force of the steering shaft acts on the inclined surface of the engaging portion, so that the influence on the moving direction of the locking member can be reduced, and the steering shaft of the locking member Can be released with a smaller force.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5 show a first embodiment of the present invention, FIG. 1 is an exploded perspective view of a steering lock device, FIG. 2 is an assembled perspective view of the steering lock device, FIG. 3 is a bottom view of the steering lock device, and FIG. FIG. 4 (a) is a sectional view showing an unlocked state, FIG. 4 (b) is a sectional view showing a locked state, and FIG. 4 (c) is a sectional view showing a half-locked state. FIG. 5 is a cross-sectional view of the steering lock device, FIG. 5 (a) is a cross-sectional view showing a half-unlocked state, and FIG. 5 (b) is a cross-sectional view showing a state where the lock member is swung in the semi-unlocked state. FIG. 5C is a cross-sectional view showing an unlocked state. 4A to 4C and FIGS. 5A to 5C are cross-sectional views taken along line AA in FIG.

  The steering lock device 1 of this embodiment includes a housing 3 that is attached to a steering column device (not shown) that houses a steering shaft 2 of an automobile. The housing 3 is driven by a drive source (not shown) and moves in a direction perpendicular to the axial direction of the steering shaft 2, and is driven via the hanger member 4, and the tip is the bottom surface of the housing 3. A lock member 5 that can enter and exit from the steering shaft 2 is accommodated. In the case of a mechanical steering lock device, the operating force of an operator is a drive source, and in the case of an electric steering lock device, a motor is a drive source. A plurality of engaging protrusions 20 extending in the axial direction are formed on the outer periphery of the steering shaft 2, and an engaging groove 21 into which the hanger member 4 is inserted is formed between the adjacent engaging protrusions 20. Has been.

  The housing 3 has a cylindrical hanger housing hole 30 for housing the hanger member 4, and is attached to the steering column device in a state extending in a direction perpendicular to the steering shaft 2.

  The hanger member 4 is slidably disposed in the hanger receiving hole 30 without a gap. The hanger member 4 has a bottomed cylindrical shape and is formed with a lock housing chamber 40 that can accommodate at least a part of the lock member 5. Further, the lock housing chamber 40 has a cylindrical portion extending in a direction perpendicular to the steering shaft 2 in a state where the hanger member 4 is housed in the hanger housing hole 30 and opens toward the steering shaft 2. Is set to The hanger member 4 is urged toward the steering shaft 2 by a spring member (not shown).

  The lock member 5 is slidably disposed in the lock storage chamber 40. The lock member 5 includes an engaging portion 50 set in a substantially rectangular parallelepiped shape that can slide in the lock accommodating chamber 40 without a gap on the distal end side, and extends in a beam shape from the proximal end side of the engaging portion 50. And a pair of arm portions 51 set to be narrower than the inner diameter of the lock accommodating chamber 40. Each arm 51 is formed with a long hole 53 that extends in the longitudinal direction of the arm 51 and through which a support shaft 42 described later is inserted. In the vicinity of the base portion of the arm portion 51 of the engaging portion 50, an inclined surface 52 that gradually becomes thinner from the engaging portion 50 toward the arm portion 51 is provided.

  The support shaft 42 has a semi-cylindrical shape, and penetrates the long hole 53 while traversing the bottom of the lock housing chamber 40 along the axial direction of the steering shaft 2, so that the lock member 5 is attached to the steering shaft 2. The hanger member 4 is supported so as to be swingable along the circumferential direction. The support shaft 42 is disposed on the hanger member 4 so that the semi-cylindrical curved surface 43 faces the opening side of the lock housing chamber 40 and the semi-cylindrical flat surface 44 faces the bottom side of the lock housing chamber 40. Has been. Further, a flat surface 54 facing the opening side of the lock accommodating chamber 40 is provided on the proximal end side of the lock member 5 of the long hole 53 so as to be in close contact with the flat surface 44 of the support shaft 42.

  The spring member 45 is composed of a winding spring, and is disposed in the lock housing chamber 40 together with the lock member 5 as an urging means, and one end is inserted into a hole 55 provided in the lock member 5. It is compressed and clamped between the lock member 5. Then, the lock member 5 is urged and held in a direction away from the hanger member 4 using the compression reaction force of the spring member 45 as an urging force. Since the hole 55 of the lock member 5 is formed to a certain depth, the spring member 45 can contract even if the support shaft 42 is close to the hole 55.

  When the engaging portion 50 protrudes from the lock housing chamber 40, the flat surface 44 and the flat surface 54 are pressed against each other by the urging force of the spring member 45, and the lock member 5 is held in a direction away from the hanger member 4. Further, when the hanger member 4 is moved in the locking direction (toward the steering shaft 2), the lock member 5 is accommodated in the swing restricting portion 41 of the hanger member 4 so that the lock member 5 swings. Is blocked.

  Next, the operation of the steering lock device 1 will be described. As shown in FIG. 4A, when the lock member 5 is unlocked, the hanger member 4 moves back into the hanger receiving hole 30 of the housing 3 and is displaced to the unlocked position, so that the steering shaft 2 is allowed to rotate. The car is in a maneuverable state. At this time, the lock member 5 is urged toward the steering shaft 2 by the spring member 45 and the flat surface 54 of the lock member 5 contacts the flat surface 44 of the support shaft 42, so that the lock member 5 causes the support shaft 42 to move. Oscillation as a center of oscillation is suppressed, and a state perpendicular to the steering shaft 2 is maintained.

  Next, as shown in FIG. 4B, when the hanger member 4 moves toward the steering shaft 2 by driving the motor or the like, the distal end of the engaging portion 50 of the lock member 5 contacts and engages with the steering shaft 2. Then, the movement of the engaging portion 50 is restricted, and the hanger member 4 moves against the spring member 45, so that the base end side of the engaging portion 50 of the lock member 5 is in the lock accommodating chamber 40 of the hanger member 4. Since it is housed, the rocking of the lock member 5 is restricted. As a result, the rotation of the steering shaft 2 is blocked by the lock member 5, so that the automobile cannot be operated. At this time, for example, as shown in FIG. 4C, during the movement of the hanger member 4, the lock member 5 contacts and engages with the engaging protrusion 20 of the steering shaft 2, or is completely engaged. Even when the hanger member 4 rides up, the hanger member 4 can move against the spring member 45, and when the steering shaft 2 rotates, the engaging portion 50 of the lock member 5 is biased by the spring member 45. Since the front end abuts on the engaging groove 21 of the steering shaft 2 and engages with the engaging protrusion 20, rotation of the steering shaft 2 is prevented.

  Next, when unlocking in the locked state, as shown in FIG. 5 (a), when the hanger member 4 moves away from the steering shaft 2 and retracts into the hanger receiving hole 30 of the housing 3, the spring member The front end of the engagement portion 50 of the lock member 5 is engaged with the engagement groove 21 of the steering shaft 2 by the urging force of 45, but the lock housing chamber 40 of the hanger member 4 is on the proximal end side of the engagement portion 50. Therefore, the restriction state of the lock member 5 is released. In this state, as shown in FIG. 5B, when the steering shaft 2 rotates in the direction of the arrow A1, the lock member 5 swings in the direction of the arrow A2 with the support shaft 42 as the swing center. The input torque transmitted from 2 to the lock member 5 is released.

  Next, as shown in FIG. 5C, when the hanger member 4 is further moved away from the steering shaft 2, the lock member 5 is detached from the steering shaft 2, so that the engagement state with the steering shaft 2 is released. Completely unlocked.

  As described above, in the present invention, when the hanger member 4 starts to move from the locking position in the unlocking direction, the lock member 5 swings around the support shaft 42 as the swing shaft as the steering shaft 2 rotates, and the steering shaft 2 Since the input torque (rotational force) transmitted to the lock member 5 is reduced, the engagement state of the lock member 5 with the steering shaft 2 can be released with a relatively small force. Therefore, the drive source and the power transmission mechanism for driving the lock member 5 can be reduced in size, and the cost can be reduced.

  In the first embodiment, the lock member 5 swings when locked from the unlocked state by biasing the lock member 5 in a direction perpendicular to the steering shaft 2 by the biasing means in the unlocked state. Therefore, the lock member 5 can be reliably engaged with the steering shaft 2.

  In the first embodiment, when the lock member 5 is engaged with the steering shaft 2 in the locked state, the tip of the engaging portion 50 has a substantially rectangular parallelepiped shape even if the rotational force of the steering shaft 2 acts on the lock member 5. Since it is formed, the lock member 5 can be brought into contact with the steering shaft 2 in a more stable state.

  6 to 10 show a second embodiment of the present invention, FIG. 6 is an exploded perspective view of the steering lock device, FIG. 7 is an assembled perspective view of the steering lock device, FIG. 8 is a bottom view of the steering lock device, and FIG. Is a sectional view of the steering lock device, FIG. 9 (a) is a sectional view showing an unlocked state, FIG. 9 (b) is a sectional view showing a half-locked state, FIG. 9 (c) is a sectional view showing a locked state, 10 is a cross-sectional view of the steering lock device, FIG. 10 (a) is a cross-sectional view showing a half-unlocked state, FIG. 10 (b) is a cross-sectional view showing a state where the lock member is swung in the semi-unlocked state, FIG. 10C is a cross-sectional view showing the unlocked state. 9A to 9C and FIGS. 10A to 10C are cross-sectional views taken along line BB in FIG. 6 to 10 are the same as those shown in FIGS. 1 to 5 described above.

  In the steering lock device 1 </ b> A of the present embodiment, a block member 6 formed in a substantially U shape is provided between the hanger member 4 and the lock member 5, and the lock member 5 can be moved to the hanger member 4. A columnar support shaft 46 is provided to support, and the support shaft 46 extends in the axial direction of the steering shaft 2 so as to cross the lock housing chamber 40.

  The block member 6 is formed in a substantially U shape from two side plate portions 61 facing along the inner wall of the lock housing chamber 40 and a bottom plate portion 60 connecting the end portions of the side plate portions 61, and the side plate portion 61 is locked. It is formed in the storage chamber 40 so as to be slidable without a gap. Further, the block member 6 holds the one end of the spring member 45 between the spring member 45 and the lock member 5 with a pressure receiving portion 60a set on the substantially U-shaped inner side of the bottom plate portion 60, while the bottom plate portion 60 The contact portion 60 b set outside the substantially U-shape is disposed so as to contact the proximal end surface 50 a of the engagement portion 50 of the lock member 5. Then, when shifting from the locked state to the unlocked state, the block member 6 does not swing but only the lock member 5 swings.

  Next, the operation of the steering lock device 1A will be described. As shown in FIG. 9A, when the lock member 5 is unlocked, the hanger member 4 retracts into the hanger receiving hole 30 of the housing 3 and is displaced to the unlocked position, so that the steering shaft 2 is allowed to rotate. The car is in a maneuverable state. At this time, the lock member 5 is biased toward the steering shaft 2 by the spring member 45 via the block member 6, and the side plate portion 61 of the block member 6 is guided along the lock housing chamber 40 of the hanger member 4. Therefore, the lock member 5 is restrained from swinging around the support shaft 42 as a swing center, and is kept perpendicular to the steering shaft 2.

  Next, as shown in FIG. 9B, when the hanger member 4 moves toward the steering shaft 2 by driving the motor or the like, the front end of the engaging portion 50 of the lock member 5 is engaged with the steering shaft 2, Since the base end side of the engaging part 50 of the lock member 5 is accommodated in the lock accommodating chamber 40 of the hanger member 4, the rocking restriction part 41 of the hanger member 4 restricts the rocking of the lock member 5. As a result, the rotation of the steering shaft 2 is blocked by the lock member 5, so that the automobile cannot be operated. At this time, for example, when the lock member 5 rides on the engaging protrusion 20 of the steering shaft 2, the spring member 45 is urged when the steering shaft 2 is rotated as shown in FIG. As a result, the lock member 5 is engaged with the engagement groove 21 of the steering shaft 2, so that the rotation of the steering shaft 2 is prevented.

  Next, when unlocking in the locked state, as shown in FIG. 10A, when the hanger member 4 moves away from the steering shaft 2 and retreats into the hanger receiving hole 30 of the housing 3, the spring member The distal end of the engagement portion 50 of the lock member 5 is engaged with the engagement groove 21 of the steering shaft 2 by the urging of 45, but the proximal end side of the engagement portion 50 of the lock member 5 is the lock accommodating chamber 40 of the hanger member 4. Therefore, the restriction state of the lock member 5 is released. In this state, as shown in FIG. 10B, when the steering shaft 2 rotates in the direction of the arrow A1, the lock member 5 swings in the direction of the arrow A2 with the support shaft 42 as the center of swinging. The input torque transmitted from 2 to the lock member 5 is released.

  Next, as shown in FIG. 10 (c), when the hanger member 4 further moves away from the steering shaft 2, the lock member 5 is detached from the steering shaft 2, so that the engaged state with the steering shaft 2 is released. Completely unlocked.

  As described above, according to the present invention, when the hanger member 4 starts to move from the locking position in the unlocking direction, the lock member 5 swings around the support shaft 46 as the center of swing as the steering shaft 2 rotates, and the steering shaft 2 Since the input torque transmitted to the lock member 5 is reduced, the engagement state of the lock member 5 with the steering shaft 2 can be released with a relatively small force. Therefore, the drive source and the power transmission mechanism for driving the lock member 5 can be reduced in size, and the cost can be reduced.

  In the second embodiment, the lock member 5 is swung when the lock member 5 is locked from the unlocked state by urging the lock member 5 in a direction perpendicular to the steering shaft 2 by the urging means in the unlocked state. Therefore, the lock member 5 can be reliably engaged with the steering shaft 2.

  In the second embodiment, the block member 6 holds the one end of the spring member 45 between the spring member 45 and the lock member with the pressure receiving portion 60a, and the base end side of the engaging portion 50 with the contact portion 60b. Since the end of the spring member 45 does not oscillate even when the lock member 5 oscillates due to the contact with the end surface 50a, the urging force is transmitted to the lock member 5. Can do. As a result, when the lock member 5 swings, the end of the spring member 45 follows the lock member 5, thereby eliminating the possibility of the spring member 45 dropping off, and reliably transmitting the biasing force to the lock member 5. it can.

  In the second embodiment, when the lock member 5 is engaged with the steering shaft 2 in the locked state, the tip of the engaging portion 50 has a substantially rectangular parallelepiped shape even if the rotational force of the steering shaft 2 acts on the lock member 5. Since it is formed, the lock member 5 can be brought into contact with the steering shaft 2 in a more stable state.

  In the present embodiment, both the abutting portion 60b of the block member 6 and the proximal end surface 50a of the engaging portion 50 are flat surfaces. However, as the circular arc surface with the support shaft 42 as the center, it is easy to swing. However, the same effect can be obtained.

  11 to 15 show a third embodiment of the present invention, FIG. 11 is an exploded perspective view of the steering lock device, FIG. 12 is an assembled perspective view of the steering lock device, FIG. 13 is a bottom view of the steering lock device, and FIG. FIG. 14A is a sectional view showing the unlocked state, FIG. 14B is a sectional view showing the half-locked state, and FIG. 14C is a sectional view showing the locked state. 15A is a cross-sectional view of the steering lock device, FIG. 15A is a cross-sectional view showing a half-unlocked state, and FIG. 15B is a cross-sectional view showing a state where the lock member is swung in the semi-unlocked state. FIG. 15C is a cross-sectional view showing the unlocked state. 14A to 14C and FIGS. 15A to 15C are cross-sectional views taken along the line CC of FIG. 11 to 15, the same reference numerals are given to the same components as those shown in FIGS. 1 to 10 described above.

  In the steering lock device 1B of the present embodiment, the distal end of the engagement portion 50 of the lock member 5 is formed in a substantially wedge shape by the inclined surface 55 that is set obliquely with respect to the engagement protrusion 20. The hanger member 4 is driven by a cam member 7. The cam member 7 is driven to rotate by a drive source (not shown).

  Next, the operation of the steering lock device 1B will be described. As shown in FIG. 14A, when the lock member 5 is unlocked, the hanger member 4 is retracted into the hanger receiving hole 30 of the housing 3 and displaced to the unlock position, and the rotation of the steering shaft 2 is allowed. The car is in a maneuverable state. At this time, the lock member 5 is biased toward the steering shaft 2 by the spring member 45 via the block member 6, and the side plate portion 61 of the block member 6 is guided along the lock housing chamber 40 of the hanger member 4. Therefore, the lock member 5 is restrained from swinging around the support shaft 46 as a swing center, and is kept perpendicular to the steering shaft 2.

  Next, as shown in FIG. 14B, when the hanger member 4 moves toward the steering shaft 2 by driving the motor in accordance with the output of the locking signal, the tip of the engaging portion 50 of the lock member 5 moves to the steering shaft 2. In addition to engaging, the base end side of the engaging portion 50 of the lock member 5 is accommodated in the lock accommodating chamber 40 of the hanger member 4, so that the rocking restriction portion 41 of the hanger member 4 restricts the rocking of the lock member 5. . As a result, the rotation of the steering shaft 2 is blocked by the lock member 5, so that the automobile cannot be operated. At this time, for example, when the lock member 5 rides on the engaging protrusion 20 of the steering shaft 2 and then the steering shaft 2 rotates, the lock member 5 is engaged with the steering shaft 2 by the bias of the spring member 45. Since the engaging groove 21 is engaged, the rotation of the steering shaft 2 is prevented.

  Next, as shown in FIG. 14C, the distal end of the engagement portion 50 of the lock member 5 comes into contact with the engagement groove 21 of the steering shaft 2 and is completely locked.

  Next, when unlocking in the locked state, as shown in FIG. 15A, when the hanger member 4 moves away from the steering shaft 2 and moves backward into the hanger receiving hole 30 of the housing 3, the spring member The distal end of the engagement portion 50 of the lock member 5 is engaged with the engagement groove 21 of the steering shaft 2 by the urging of 45, but the proximal end side of the engagement portion 50 of the lock member 5 is the lock accommodating chamber 40 of the hanger member 4. Therefore, the restriction state of the lock member 5 is released. In this state, as shown in FIG. 15B, when the steering shaft 2 rotates in the direction of the arrow A1, the lock member 5 swings in the direction of the arrow A2 with the support shaft 46 as the center of swinging. The input torque transmitted from 2 to the lock member 5 is reduced.

  Next, as shown in FIG. 15C, when the hanger member 4 further moves in the direction away from the steering shaft 2, the lock member 5 is detached from the steering shaft 2, so that the engagement state with the steering shaft 2 is released. Completely unlocked.

  As described above, according to the present invention, when the hanger member 4 starts to move from the locking position in the unlocking direction, the lock member 5 swings around the support shaft 46 as the center of swing as the steering shaft 2 rotates, and the steering shaft 2 Since the input torque transmitted to the lock member 5 is reduced, the engagement state of the lock member 5 with the steering shaft 2 can be released with a relatively small force. Therefore, the drive source and the power transmission mechanism for driving the lock member 5 can be reduced in size, and the cost can be reduced.

  In the third embodiment, the lock member 5 swings when locked from the unlocked state by urging the lock member 5 in the unlocked state by the spring member 45 in the direction perpendicular to the steering shaft 2. Therefore, the lock member 5 can be reliably engaged with the steering shaft 2.

  In the second embodiment, the block member 6 holds the one end of the spring member 45 between the spring member 45 and the lock member with the pressure receiving portion 60a, and the base end side of the engaging portion 50 with the contact portion 60b. Since the end of the spring member 45 does not oscillate even when the lock member 5 oscillates due to the contact with the end surface 50a, the urging force is transmitted to the lock member 5. Can do. As a result, when the lock member 5 swings, the end of the spring member 45 follows the lock member 5, thereby eliminating the possibility of the spring member 45 dropping off, and reliably transmitting the biasing force to the lock member 5. it can.

  In the third embodiment, when locking from the unlocked state, the distal end of the lock member 5 is formed in a substantially wedge shape, so that the distal end of the lock member 5 can be easily engaged with the engagement groove 21 on the outer periphery of the steering shaft 2. Can be combined. Further, when the hanger member 4 starts to move from the locking position in the unlocking direction, the rotational force of the steering shaft 2 acts on the inclined surface 55 at the tip of the locking member 5, thereby reducing the influence of the locking member 5 on the moving direction. The engagement state of the lock member 5 with the steering shaft 2 can be released with a smaller force.

  In the present embodiment, both the abutting portion 60b of the block member 6 and the proximal end surface 50a of the engaging portion 50 are flat surfaces. However, as the circular arc surface with the support shaft 42 as the center, it is easy to swing. However, the same effect can be obtained.

1 is an exploded perspective view of a steering lock device according to a first embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an assembled perspective view of a steering lock device according to a first embodiment of the present invention. 1 is a bottom view of a steering lock device according to a first embodiment of the present invention. 1 is a cross-sectional view of a steering lock device according to a first embodiment of the present invention, where (a) is a cross-sectional view showing an unlocked state, (b) is a cross-sectional view showing a locked state, and (c) is a half-locked state. It is sectional drawing. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a steering lock device according to a first embodiment of the present invention, where (a) is a cross-sectional view showing a semi-unlocked state, and (b) is a state where a lock member is swung in a semi-unlocked state. Sectional drawing and (c) are sectional drawings which show an unlocked state. FIG. 5 is an exploded perspective view of a steering lock device according to a second embodiment of the present invention. FIG. 6 is an assembled perspective view of a steering lock device according to a second embodiment of the present invention. It is a bottom view of a steering lock device, showing a second embodiment of the present invention. FIG. 2 is a cross-sectional view of a steering lock device according to a second embodiment of the present invention, where (a) is a cross-sectional view showing an unlocked state, (b) is a cross-sectional view showing a half-locked state, and (c) is a locked state. It is sectional drawing. FIG. 2 is a cross-sectional view of a steering lock device according to a second embodiment of the present invention, where (a) is a cross-sectional view showing a half-unlocked state, and (b) is a state where the lock member is swung in the semi-unlocked state. Sectional drawing and (c) are sectional drawings which show an unlocked state. FIG. 5 is an exploded perspective view of a steering lock device according to a third embodiment of the present invention. FIG. 5 is an assembled perspective view of a steering lock device according to a third embodiment of the present invention. It is a bottom view of a steering lock device, showing a 3rd embodiment of the present invention. FIG. 4 is a cross-sectional view of a steering lock device according to a third embodiment of the present invention, where (a) is a cross-sectional view showing an unlocked state, (b) is a cross-sectional view showing a half-locked state, and (c) is a locked state. It is sectional drawing. FIG. 4 is a cross-sectional view of a steering lock device according to a third embodiment of the present invention, where (a) is a cross-sectional view showing a semi-unlocked state, and (b) is a state where a lock member is swung in the semi-unlocked state. Sectional drawing and (c) are sectional drawings which show an unlocked state. It is sectional drawing which shows the steering lock apparatus of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steering lock apparatus 2 Steering shaft 3 Housing 4 Hanger member 5 Lock member 6 Block member 30 Hanger accommodating hole 40 Lock accommodating chamber 41 Swing regulation part 42 Support shaft 45 Spring member (biasing means)
46 Support shaft 50 Engagement part 50a Base end side end face 51 Arm part 53 Long hole 55 Inclined surface 60 Bottom plate part 60a Pressure receiving part 60b Abutting part

Claims (4)

A swing restricting portion that is slidable between the locking position and the unlocking position set in the hanger receiving hole provided in the housing without gaps and has a cylindrical shape along the moving direction inside; A hanger member having a lock accommodating chamber formed in the swing restricting portion;
An engagement portion that is disposed in the lock housing chamber and has a shape that is slidable in the cylindrical direction without a gap on the distal end side, and an arm that extends from the proximal end side of the engagement portion And a long hole formed along the arm, and the inside of the cylindrical shape of the rocking restricting portion is rocked by a support shaft that passes through the long hole and is disposed in the rocking restricting portion. A locking member that is movably supported;
An urging means for urging and holding the lock member in a direction away from the hanger member between the hanger member and the lock member while being disposed in the lock housing chamber together with the lock member;
In the unlocked state, while the hanger member is separated from the steering shaft at the unlocked position, the locking member protrudes out of the lock storage chamber by the biasing means, and the lock member is While being separated from the shaft, it is swingably supported with respect to the hanger member,
In the locked state, the hanger member approaches the steering shaft at the locked position, and the front end of the engaging portion abuts against the steering shaft and counters the urging force of the urging means. The joint portion moves into the lock housing chamber, and the swing restricting portion restricts swinging of the lock member,
When shifting from the locked state to the unlocked state, the hanger member is separated from the steering shaft, and the locking member protrudes from the lock housing chamber by the biasing force of the biasing means, and is further formed on the outer periphery of the steering shaft. A steering lock characterized in that, when the engaging protrusion is engaged with the engaging part, the locking member swings to release the engaging force from the engaging protrusion. apparatus. The steering lock device according to claim 1,
From the two side plate portions facing along the inner wall of the lock accommodating chamber and the bottom plate portion connecting the end portions of the side plate portions, the side plate portion slides into the lock accommodating chamber without any gap. A block member formed so as to be possible,
The block member holds one end of the urging means between the urging means and the lock member with a pressure receiving portion set on the substantially U-shaped inner side of the bottom plate part, and It is arranged so as to abut on the lock member at the abutting portion set outside the U shape,
A steering lock device characterized in that, when shifting from the locked state to the unlocked state, the block member does not swing but only the lock member swings. The steering lock device according to claim 1 or 2,
The steering lock device according to claim 1, wherein the engaging portion of the lock member is formed in a substantially rectangular parallelepiped shape. The steering lock device according to claim 1 or 2,
The steering lock device according to claim 1, wherein the engagement portion of the lock member is formed in a substantially wedge shape by an inclined surface set obliquely with respect to the engagement protrusion.

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