JP7112985B2 - electric steering lock device - Google Patents

Description

The present invention is supported by the body so as to be movable between a lock position in which a body and a steering interlocking member that rotates according to a steering operation are engaged and an unlock position in which the engagement is released. a lock member that is biased toward the unlocked position; and a cam member that is interlocked and connected to the lock member while enabling the lock member to be driven between the unlocked position and the locked position; An electric steering lock device comprising: an electric motor capable of exerting power for rotationally driving the cam member; and a cover member attached to the body so as to cover part of the lock member and the cam member. Regarding.

Such an electric steering lock device is known from Patent Document 1 and the like.

JP 2016-68742 A

In the technique disclosed in Patent Document 1, a support shaft for rotatably supporting a cam member is arranged on an extension of the movement direction of the lock member from the locked position to the unlocked position, and the lock member is provided with a support shaft. When an impact or the like is applied, the impact is surely received by the support shaft to prevent other parts from being damaged. However, due to the layout between the electric steering lock device and the vehicle body, it may be necessary to offset the support shaft of the cam member laterally from the extension of the moving direction of the lock member. In such a case, as disclosed in Japanese Unexamined Patent Application Publication No. 2002-100000, in order to receive the impact from the lock member at the support shaft of the cam member, for example, a slider interlocked and connected to the lock member is provided with a support for the cam member. It is necessary to change the shape such that the abutment arm portion that can abut against the shaft is continuously provided so as to extend toward the support shaft, which complicates the structure and leads to an increase in the size of the casing and thus the device.

The present invention has been made in view of such circumstances. An object of the present invention is to provide an electric steering lock device capable of avoiding complication of structure and enlargement of the device due to shape change of parts, etc. when receiving an impact from a locking member.

In order to achieve the above object, the present invention enables movement between a lock position where a body engages with a steering interlocking member that rotates according to a steering operation, and an unlock position where the engagement is released. a lock member that is supported by the body and biased toward the unlock position as a lock member that is interlocked with the lock member while enabling the lock member to be driven between the unlock position and the lock position , a cam member to be connected, an electric motor capable of exerting power to rotate the cam member, and a cover attached to the body so as to cover a part of the lock member and the cam member. In the electric steering lock device comprising a member, a regulating wall arranged on an extension of a movement direction of the lock member between the lock position and the unlock position is configured to move the lock member to the unlock position side. A first feature is that a rotation restricting portion is provided integrally with the cover member so as to restrict the end thereof, and the cover member is integrally provided with a rotation restricting portion for restricting rotation of the cam member .

The steering shaft 23 of the embodiment corresponds to the steering interlocking member of the invention, the lock pin 25 of the embodiment corresponds to the lock member of the invention, and the gear cover 54 of the embodiment corresponds to the cover member of the invention. handle.

According to the first feature of the present invention, the end of movement of the lock member toward the unlock position is regulated by the regulating wall provided integrally with the cover member, so that the support shaft of the cam member moves in the direction of movement of the lock member. Even at a position offset laterally from the extension line of , it is possible to receive the impact from the lock member with a simple structure in which the control wall is integrally provided with the cover member, and the structure by changing the shape of the parts complication and an increase in the size of the apparatus can be avoided.

In addition, since the rotation of the cam member is restricted by the rotation restricting portion provided integrally with the cover member, the cover member can have the function of restricting the movement of the lock member and the function of restricting the rotation of the cam member. While avoiding an increase in the number of parts, it is possible to further prevent an increase in the size of the device.

1 is a perspective view of an electric steering lock device; FIG. 1 is an exploded perspective view of an electric steering lock device; FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 1; FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 3; FIG. 4 is a cross-sectional view taken along line 5-5 of FIG. 3; FIG. 1 is a perspective view of an electric steering lock device with a seal member and a seal cover removed; FIG. FIG. 2 is a plan view of the electric steering lock device with the upper cover and gear cover removed; It is the perspective view which looked at the slider from diagonally upward. It is the perspective view seen from diagonally below the slider. FIG. 4 is an exploded perspective view of a worm wheel and a cam member as seen obliquely from above; FIG. 4 is an exploded perspective view of a worm wheel and a cam member viewed obliquely from below; FIG. 4 is a perspective view of the gear cover as seen from below; FIG. 13 is a perspective view of the gear cover as seen from the direction of arrow 13 in FIG. 12; FIG. 4 is an exploded perspective view of a switch slider and coil springs; FIG. 10 is a diagram showing the relative positions of the lock pin, slider, cam member, and switch slider when the lock pin is in the unlocked position; FIG. 10 is a diagram showing relative positions of the lock pin, the slider, the cam member, and the switch slider when the lock pin starts moving toward the lock position; FIG. 10 is a diagram showing relative positions of the lock pin, the slider, the cam member, and the switch slider when the lock pin has made a full stroke toward the lock position; FIG. 6 is a cross-sectional view corresponding to FIG. 5 in a state where the lock pin has made a full stroke toward the lock position; FIG. 10 is a diagram showing the relative positions of the lock pin, slider, cam member, and switch slider while the lock pin is held in the locked position;

Embodiments of the present invention will now be described with reference to FIGS. 1 to 19 attached herewith. First, in FIG. 1, this electric steering lock device is used, for example, in a smart entry system for a motorcycle. releasing the steering lock state when the user carrying the portable transmitter/receiver gets on the motorcycle, and releasing the steering lock state when the user carrying the portable transmitter/receiver exits the motorcycle. It operates to release the state.

2 to 5, a steering shaft 23 as a steering interlocking member that rotates according to a steering operation is rotatable in a head pipe 22 forming part of a vehicle body frame 21. As shown in FIG. The electric steering lock device is configured to switch between a locked state in which the steering shaft 23 is engaged and an unlocked state in which the engagement is released.

The electric steering lock device is supported by a fixed casing 24 so as to be linearly reciprocatable between a lock position where the steering shaft 23 is engaged and an unlock position where the engagement is released. a lock pin 25 as a lock member that drives the lock pin 25; a motion conversion mechanism 27 interposed between the electric motor 26 and the lock pin 25 within the casing 24 so as to convert the motion into linear motion.

The casing 24 comprises a body 28 fixed to the vehicle body frame 21 , an upper cover 29 fastened to the upper part of the body 28 , and a lower cover 30 fastened to the lower part of the body 28 .

The body 28 has a first wall portion 28aa facing the head pipe 22 and a position spaced apart from the first wall portion 28aa so as to sandwich the first wall portion 28aa with the head pipe 22. The side wall 28a has a second wall portion 28ab arranged in an endless manner, and the intermediate wall 28b is formed integrally with the inner circumference of the portion near the lower end of the side wall 28a.

A support hole 31 extending in a direction orthogonal to the axis of the steering shaft 23 is provided in the first wall portion 28aa of the side wall 28a of the body 28. The lock pin 25 is slidably fitted to allow linear movement between the unlocked positions, and an annular seal member 32 is interposed between the body 28 and the lock pin 25 .

Also referring to FIG. 6, the first wall portion 28aa of the body 28 has an annular groove coaxially connected to the end of the support hole 31 on the steering shaft 23 side and opened to the steering shaft 23 side. is provided, and the seal member 32 is accommodated in the seal accommodation recess 33 . Moreover, a seal cover 34 is attached to a wall surface 35 facing the steering shaft 23 side of the first wall portion 28aa of the body 28 by, for example, a pair of first screw members 36. The seal cover 34 is When attached to the wall surface 35 of the body 28 , the seal member 32 accommodated in the seal accommodation recess 33 is crushed inside the seal accommodation recess 33 and brought into sliding contact with the outer peripheral surface of the lock pin 25 . It is sandwiched between the body 28 and the body 28 .

The wall surface 35 of the body 28 is provided with a pair of positioning projections 37 arranged around the seal accommodating recess 33, and a pair of positioning recesses 38 into which the positioning projections 37 are fitted is formed by the seal. The seal cover 34 formed on the cover 34 and with the positioning projections 37 fitted in the positioning recesses 38 is attached to the wall surface 35 of the body 28 with the pair of first screw members 36 .

The seal cover 34 is fitted into a fitting hole 39 provided in the head pipe 22, and the outer surface 34a of the seal cover 34 facing the steering shaft 23 has a shape following the shape of the outer surface of the steering shaft 23. That is, it is formed to have an arcuate cross-sectional shape.

By the way, one end of the lock pin 25 projects from the seal cover 34 toward the steering shaft 23 when it is in the locked position. By engaging one end of the lock pin 25, the rotation of the steering shaft 23 is prevented and the steering is locked.

Also referring to FIG. 7, the body 28 includes a part of the side wall 28a of the body 28 and a partition wall 43 integrally connected to the side wall 28a, and the motor is arranged above the intermediate wall 28b. A housing recess 44 is formed so as to open to the upper cover 29 side, and the electric motor 26 wound with felt 45 is rotated so that its rotation axis is parallel to the moving direction of the lock pin 25. be accommodated. On the other hand, the upper cover 29 is formed with a curved bulging portion 29a corresponding to a part of the outer circumference of the electric motor 26, and the electric motor 26 around which the felt 45 is wound is located at the upper portion. It is fixed to the casing 24 by being sandwiched between the bulging portion 29 a of the cover 29 and the body 28 .

By the way, first and second bearing portions 26a and 26b for rotatably supporting an output shaft 46 are projected from both ends of the electric motor 26 in the longitudinal direction. A shaft 46 is projected. Moreover, the upper portion of the partition wall 43 is formed with a fitting recess 47 into which the first bearing portion 26a is fitted. A gear chamber 48 is formed between the intermediate wall 28b and the upper cover 29 in the casing 24 and adjacent to the motor housing recess 44 with the partition wall 43 therebetween. The tip of the output shaft 46 is fitted into and supported by a support recess 49 formed in the intermediate wall 28b of the body 28 and opened upward.

The motion conversion mechanism 27 is accommodated in the gear chamber 48. The motion conversion mechanism 27 includes a worm 50 provided on the output shaft 46 of the electric motor 26, a worm wheel 51 meshing with the worm 50, and a worm wheel 51. Equipped with a cam member 52 interlocked and connected to the wheel 51 and a slider 53 interlocked and connected to the other end of the lock pin 25, it is arranged below the upper cover 29 so as to cover the motion conversion mechanism 27. A gear cover 54 (see FIGS. 4 and 5) is attached to the body 28 by second screw members 56 (see FIG. 2) screwed into a pair of screw holes 55 provided in the body 28. Mounted.

8 and 9, the slider 53 is a pair of side plate portions arranged along a plane orthogonal to the rotation axis of the electric motor 26 and facing each other with a gap in the direction along the rotation axis. 53a, a connection plate portion 53b that connects the upper portions of the side plate portions 53a, and a pair of side plate portions 53a that extend perpendicularly to the end portions of the side plate portions 53a on the opposite side of the lock pin 25 and extend in mutually separating directions. A connecting portion 53d connecting the pair of overhanging plate portions 53c and the ends of the pair of side plate portions 53a opposite to the lock pin 25 to each other, and a downward projecting portion 53e projecting downward from the connecting portion 53d. and integrally.

In the intermediate wall 28b of the body 28, as shown in FIG. 3, a guide groove 57 connected to the support hole 31 has a width larger than the inner diameter of the support hole 31 and opens upward. Parts of the pair of side plate portions 53a of the slider 53 are fitted into the guide grooves 57 so as to be slidable.

At the other end of the lock pin 25, an insertion portion 25a inserted between the pair of side plate portions 53a of the slider 53 and a pair of engaging arm portions 25b extending from the insertion portion 25a to both sides are provided. The side plate portion 53a of the slider 53 is integrally formed with engaging recesses 58 that open downward so that the engaging arm portions 25b are inserted and engaged. Moreover, a rod-shaped first spring guide 59 protruding into the insertion portion 25a of the lock pin 25 is provided at the connection portion 53d of the slider 53, and the first spring guide 59 is provided at the insertion portion 25a. A first spring accommodating recess 60 corresponding to is formed.

A first coil spring 61 is contracted between the insertion portion 25a of the lock pin 25 and the connection portion 53d of the slider 53, and a part of it is accommodated in the first spring accommodation recess 60. The other end of the first coil spring 61, one end of which contacts the insertion portion 25a in such a manner as to surround the first spring guide 59, contacts the connecting portion 53d. The lock pin 25 is urged by the first coil spring 61 so that the engaging arm portion 25b contacts the side edge of the locking recess 58 on the steering shaft 23 side.

Further, second rod-shaped spring guides 62 projecting in the same direction as the first spring guides 59 project from the pair of projecting plate portions 53c of the slider. On the other hand, the body 28 is formed with a pair of second spring receiving recesses 63 corresponding to the second spring guides 62 .

A pair of second coil springs 64 are contracted between the pair of overhanging plate portions 53c of the slider 53 and the body 28. The other end of the second coil spring 64, one end of which contacts the body 28 so as to be accommodated, surrounds the second spring guide 62 and contacts the projecting plate portion 53c. be. The second coil spring 64 urges the slider 53 toward the unlock position of the lock pin 25 .

In order to assemble and remove the lock pin 25 and the slider 53 to and from the body 28, a portion of the second wall portion 28ab of the body 28 corresponding to the lock pin 25 and the slider 53 is provided downwardly. An open rectangular notch 67 is formed. In order to close the notch 67, the lower cover 30 is provided with a flat plate portion 30a corresponding to the side wall 28a of the body 28 and an upper part from the flat plate portion 30a so as to close the notch 67 of the side wall 28a. It is formed so as to integrally have a vertical plate portion 30b projecting outward.

An endless upper sealing member 69 is interposed between the body 28 and the upper cover 29 so as to fit into an upper sealing groove 68 formed at the upper end of the side wall 28a of the body 28. The upper cover 29 is fastened to the body 28 with a plurality of, for example, four third screw members 70 . Between the body 28 and the lower cover 30, an endless lower sealing member 72 is interposed in a lower sealing groove 71 formed in the lower end of the side wall 28a including the side edge of the notch 67. The lower cover 30 is fastened to the body 28 with a plurality of, for example, four fourth screw members 73 (see FIG. 2).

A circuit board 76 is fastened to the lower cover 30 by, for example, two fifth screw members 75 (see FIG. 2). A connector 77 is assembled to the lower cover 30 for electrical connection with the body 28 and is fastened to the side wall 28 a of the body 28 with a sixth screw member 78 .

The worm wheel 51 and the cam member 52 are rotatably supported by a support shaft 79 so as to rotate together. The support shaft 79 is located at a position laterally offset from the extension of the lock pin 25 in the moving direction, which is the side opposite to the electric motor 26 with respect to the lock pin 25 and the slider 53 in this embodiment. One end of the support shaft 79 is fitted to the body 28. In this embodiment, the support shaft 79 is made of metal, but is made of resin for cost reduction. is also possible.

The worm wheel 51 and the cam member 52 formed radially smaller than the worm wheel 51 and interlocked with and connected to the worm wheel 51 are arranged below the worm wheel 51. In this manner, the cam member 52 is arranged above the slider 53 while partially overlapping the connecting plate portion 53b of the slider 53 when viewed from the direction along the axis of the support shaft 79. be done.

10 and 11, the worm wheel 51 includes a disk portion 51a, a cylindrical portion 51b extending perpendicularly to the outer peripheral edge of the disk portion 51a, and a lower surface of the disk portion 51a. Circular protrusions 51c projecting downward from an outer peripheral portion of approximately half the circumference and both ends in the circumferential direction are integrally formed with the inner periphery of the cylindrical portion 51b. angled teeth 80 are formed.

The cam member 52 is disposed below the disk portion 51a of the worm wheel 51, and has a disk-shaped base portion 52a formed with a smaller diameter than the disk portion 51a of the worm wheel 51. a projecting portion 52b projecting laterally from the outer circumference of approximately half the circumference of the base portion 52a and projecting downward from the base portion 52a; It is formed so as to integrally have an arc-shaped extension portion 52c extending along the portion. Moreover, when the lock pin 25 is moved to the lock position, the cam member 52 rotates in the lock position side rotation direction 81 indicated by the arrows in FIGS. It extends from the front end of the protrusion 52b in the position-side rotation direction 81 .

In the lower portion of the worm wheel 51, the portion of the cylindrical portion 51b excluding the arcuate protrusion 51c and the arcuate protrusion 51c form a fitting recess 82 corresponding to the outer peripheral shape of the cam member 52. A part of the cam member 52 is fitted into the fitting recess 82 .

Moreover, a center hole 83 through which the support shaft 79 is inserted is formed in the center of the disc portion 51a of the worm wheel 51, and a center hole 84 corresponding to the center hole 83 is also formed in the base portion 52a of the cam member 52. It is formed so that the support shaft 79 is inserted therethrough.

By the way, the slider 53 interlocked and connected to the lock pin 25 is driven by the cam member 52 when the lock pin 25 is moved from the unlock position to the lock position. A lock pin driving portion 85 that can come into contact with a pressure receiving projection 53f projecting from the end portion of the plate portion 53b on the lock pin 25 side moves in response to the rotation of the cam member 52 in the lock position side rotation direction 81. is provided at the front end of the protruding portion 52b of the cam member 52 along the lock position side rotating direction 81 so as to apply a pressing force to the pressure receiving projection 53f.

12 and 13, the other end of the support shaft 79, one end of which is fitted and supported by the intermediate wall 28b of the body 28, is fitted to the center of the lower surface of the gear cover 54. As shown in FIG. , and a boss portion 54a is provided so as to protrude therefrom. A rotation restricting portion 86 projecting radially outward from the boss portion 54a is provided integrally with the lower surface of the gear cover 54. As shown in FIG.

The rotation restricting portion 86 restricts the rotation of the worm wheel 51 and the cam member 52 , and the cam member 52 rotating together with the worm wheel 51 can come into contact with the rotation restricting portion 86 . A regulated portion 89 is provided.

As shown in FIGS. 10 and 11, the regulated portion 89 protrudes from the upper surface of the front end of the projecting portion 52b of the cam member 52 along the lock position side rotation direction 81. The portion 89 is inserted into a first through hole 90 formed in the disk portion 51 a of the worm wheel 51 and protrudes above the worm wheel 51 .

A positioning projection 91 is projected from the upper surface of the projecting portion 52b of the cam member 52 at a position where the center hole of the cam member 52 is sandwiched between the regulated portion 89 and the positioning projection 91. is inserted through a second through hole 92 formed in the disk portion 51 a of the worm wheel 51 .

A worm cover 87 for covering the worm 50 from above to prevent the worm 50 from floating is integrally formed on the lower surface of the gear cover 54 so as to have a substantially U-shaped cross section opening downward. formed in

Furthermore, the gear cover 54 is integrally provided with a restricting wall 88 arranged on an extension line to the unlock position side of the linear movement direction of the lock pin 25 between the lock position and the unlock position, The restricting wall 88 abuts on the projecting plate portion 53c of the slider 53 to restrict the movement of the slider 53, thereby restricting the end of movement of the lock pin 25 toward the unlock position.

On the upper surface of the circuit board 76 fastened to the upper surface of the flat plate portion 30a of the lower cover 30, as shown in FIG. Hall ICs 94 and 95 are attached. On the other hand, the downward protruding portion 53e of the slider 53 protrudes toward the circuit board 76 from an opening 96 formed in the intermediate wall 28b of the body 28. A magnet 98 is accommodated in the concave portion 97, and a magnet holder 99 for holding the magnet 98 on the downward projecting portion 53e is resiliently engaged with the downward projecting portion 53e.

When the lock pin 25 is at the unlock position, the first Hall IC 94 detects that the lock pin 25 is at the unlock position by the proximity of the magnet 98. The second Hall IC 95 detects that the lock pin 25 is in the locked position by the magnet 98 approaching when the lock pin 25 is in the locked position.

5, a microswitch 100 for detecting the rotational positions of the worm wheel 51 and the cam member 52 is attached to the circuit board 76. As shown in FIG. Also, a switch slider 101 for changing the switching mode of the microswitch 100 in accordance with the rotation of the cam member 52 is urged toward the cam member 52 so as to be able to slide. The switch slider 101 is arranged between the switches 100, and in this embodiment, the switch slider 101 can slide in a direction parallel to the rotation axis of the cam member 52, and slide in a direction along the rotation axis. It is positioned between the cam member 52 and the microswitch 100 .

Also referring to FIG. 14, the switch slider 101 includes a slider main portion 101a having an abutting portion 102 at the tip portion on the side of the cam member 52, and a pair of arm portions projecting from both sides of the slider main portion 101a. 101b integrally.

On the other hand, a portion of the intermediate wall 28b of the body 28 corresponding to the microswitch 100 has a slide hole 103 into which the slider main portion 101a is slidably fitted, and the cams disposed on both sides of the slide hole 103. A pair of third spring housing recesses 104 open to the member 52 side and a slit 105 connecting between the slide hole 103 and the third spring housing recesses 104 are formed.

The arm portion 101b of the switch slider 101 penetrates the slit 105 from the slider main portion 101a fitted into the slide hole 103 and protrudes toward the third spring accommodating recess 104 side. The arm portion 101b is provided with a third spring guide 106 protruding toward the inside of the third spring housing recess 104 so as to surround the third spring guide 106 at one end side. A pair of third coil springs 107 are contracted between the arm portion 101b and the body 28, and the switch slider 101 is compressed by the third coil springs 107. is urged toward the cam member 52 side.

The cam member 52 is provided with a switch slider driving section 108 that drives the switch slider 101 according to the rotation of the cam member 52 . 10 and 11, the switch slider driving portion 108 is provided on the projecting portion 52b and the projecting portion 52c of the cam member 52, and rotates the projecting portion 52b toward the lock position. A first slope 109 formed on the lower surface of the rear end along the direction 81 and a second slope 110 formed on the lower surface of the front end of the extending portion 52c along the rotation direction 81 on the lock position side. The first slope 109 is formed so as to be gradually inclined downward toward the front side along the lock position side rotation direction 81, and the second slope 110 is formed so as to be inclined in the lock position side rotation direction. It is formed so as to gradually become an upper position toward the front side along 81 .

The contact portion 102 of the switch slider 101 contacts the first slope 109, the lower surface of the projecting portion 52b, the lower surface of the extension portion 52c, and the second slope 110. At least part of the portion 102 is arranged to overlap the cam member 52 when viewed from the direction along the rotation axis of the cam member 52 .

Next, the operating conditions of the lock pin 25 and the slider 53 accompanying the operation of the motion conversion mechanism 27 by the operation of the electric motor 26 will be described. In FIG. , that is, when the cam member 52 is in the non-operating state, the regulated portion 89 of the cam member 52 moves toward the rotation restricting portion 86 of the gear cover 54 in the lock position side rotation direction 81. The contact portion 102 of the switch slider 101 is in contact with the lower surface of the projecting portion 52b of the cam member 52, and is in contact with the microswitch 100 as shown in FIG. It is in.

Next, the operation of the electric motor 26 is started, and as shown in FIG. Also when the switch slider 101 is rotated in the position-side rotation direction 81, the contact portion 102 of the switch slider 101 contacts the lower surface of the projecting portion 52b of the cam member 52, and as shown in FIG. The switch 100 remains in contact.

When the cam member 52 is further rotated in the lock position side rotation direction 81 by the electric motor 26, as shown in FIG. The lock pin 25 will move to the locked position. At this time, the contact portion 102 of the switch slider 101 is in contact with the outer peripheral portion of the base portion 52a of the cam member 52 via the first slope 109 from the lower surface of the projecting portion 52b. As shown in FIG. 18, the switch slider 101 is separated from the microswitch 100 to change the switching state of the microswitch 100 from the ON state to the OFF state.

Further, the pressure receiving projection 53f of the slider 53 is displaced from the lock pin driving portion 85 to a position where it contacts the outer peripheral surface of the projecting portion 52b. In order to smoothly displace the contact portion of the pressure-receiving projection 53f, a guide surface 111 which is an inclined surface is formed between the outer peripheral surfaces of the lock pin driving portion 85 and the projecting portion 52b.

After the second Hall IC 95 detects that the lock pin 25 has made a full stroke to the lock position side, the cam member 52 is rotated in the lock position side rotation direction 81 by continuing the operation of the electric motor 26. Further, as shown in FIG. 19, the rotation of the cam member 52 causes the restricted portion 89 of the cam member 52 to move toward the rotation restricting portion 86 of the gear cover 54 in the lock position side rotation direction 81 . The pressure-receiving projection 53f of the slider 53 contacts the outer peripheral surface of the projecting portion 52b of the cam member 52, so that the locking position of the lock pin 25 is held. The contact portion 102 of the switch slider 101 is in contact with the lower surface of the extension portion 52c from the second slope 110, and contacts the microswitch 100 as shown in FIG.

When the lock pin 25 is returned from the lock position to the unlock position, the cam member 52 is rotated from the position shown in FIG. 19 to the position shown in FIG. 16 by rotating the electric motor 26 in the opposite direction. The lock pin 25 and the slider 53 are moved to the unlock position side by the biasing force of the second coil switch spring 64 .

Next, the operation of this embodiment will be described. A support hole 31 into which the lock pin 25 is slidably fitted in the body 28, and the end of the support hole 31 on the side of the steering shaft 23 are coaxially connected to the above-described steering shaft 23 side. An annular seal housing recess 33 is provided that opens toward the steering shaft 23 side, and an annular seal member 32 that is housed in the seal housing recess 33 so as to be interposed between the body 28 and the lock pin 25 serves as the seal member. A seal cover 34 is attached to a wall surface 35 of the body 28 facing the steering shaft 23 side so as to be pressed in the accommodation recess 33 and slidably contacted with the outer peripheral surface of the lock pin 25. In assembling the seal member 32, the seal member 32 only needs to be put into the seal accommodating recess 33, and the assembling property of the seal member 32 can be improved.

Further, since the outer surface 34a of the seal cover 34 facing the steering shaft 23 side is formed in a shape conforming to the shape of the outer surface of the steering shaft 23, the seal cover 34 is brought closer to the steering shaft 23 so that the steering shaft 23 and the seal cover can be installed. The gap between 34 can be kept small to prevent the lock pin 25 from being easily operated from the outside or broken to prevent the unlocking of the steering lock state, thereby improving the anti-theft property.

Further, a gear cover 54 attached to the body 28 so as to partially cover the motion conversion mechanism 27 and the lock pin 25 provided between the electric motor 26 and the lock pin 25 is provided with a gear cover 54 between the locked position and the unlocked position of the lock pin 25 . A restricting wall 88 arranged on an extension of the moving direction of the lock pin 25 is integrally provided so as to restrict the end of movement of the lock pin 25 toward the unlocking position, so that the cam member 52 can be rotated. Even if the supporting shaft 79 is offset laterally from the extension of the lock pin 25 in the moving direction, the gear cover 54 has a simple structure in which the restricting wall 88 is integrally provided to prevent the lock pin 25 from moving. can receive an impact, and it is possible to avoid complication of the structure and increase in size due to a change in the shape of the parts.

Further, since the gear cover 54 is integrally provided with the rotation restricting portion 86 for restricting the rotation of the cam member 52, the gear cover 54 has the function of restricting the movement of the lock pin 25 and the function of restricting the rotation of the cam member 52. As a result, it is possible to further prevent an increase in the size of the device while avoiding an increase in the number of parts.

Also, a microswitch 100 mounted on the circuit board 76 so as to detect the operating position of the cam member 52, and a switch capable of changing the switching mode of the microswitch 100 according to the operation of the cam member 52. A slider 101 is arranged between the cam member 52 and the microswitch 100 so as to be able to slide while being biased toward the cam member 52, so that the cam member 52 is moved in the direction along the rotation axis. It is not necessary to dispose the support shaft for rotatably supporting the relay member that changes the switching mode of the microswitch 100 according to the operation, on the side of the cam member 52. By arranging it close to the cam member 52, the size of the device can be reduced.

Moreover, the switch slider 101 having the contact portion 102 that contacts the cam member 52 can be slid in the direction parallel to the rotation axis of the cam member 52, so that the cam can move in the direction along the rotation axis. It is arranged between the member 52 and the microswitch 100, and at least a part of the contact portion 102 is arranged so as to overlap the cam member 52 when viewed from the direction along the rotation axis of the cam member 52. By disposing the switch slider 101 closer to the cam member 52, the size of the apparatus can be further reduced.

Further, the lock pin 25 is biased toward the unlock position side, and a worm wheel 51 is formed on a support shaft 79 disposed on the side of the lock pin 25 so as to be radially smaller than the worm wheel 51. The cam member 52 is rotatably supported so as to rotate in conjunction with the cam member 52 , and the lock pin 25 is moved from the unlock position to the cam member 52 in accordance with the rotation of the cam member 52 . A lock pin drive portion 85 for moving to the lock position, a switch slider drive portion 108 for driving the switch slider 101 in accordance with the rotation of the cam member 52, and rotation of the worm wheel 51 and the cam member 52. Since the regulated portion 89 that can abut on the rotation regulating portion 86 provided on the gear cover 54 is integrally formed so as to regulate the moving end, the small cam member 52 is provided with three functions. As a result, the size of the worm wheel 51 can be avoided, and the size of the device can be reduced.

Furthermore, since the regulated portion 89 is projected from the cam member 52 so as to be inserted into the first through hole 90 formed in the worm wheel 51, the cam member 52 can be positioned with respect to the worm wheel 51 in the circumferential direction. becomes easier.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various design changes may be made without departing from the scope of the present invention described in the claims. is possible.

For example, in the above-described embodiment, the worm wheel 51, which is a gear, and the cam member 52, which is a separate member from the worm wheel 51, are interlocked and connected so as to rotate in conjunction with each other. The gear and cam member may be integrally formed.

23 Steering shaft 25 which is a steering interlocking member Lock pin 26 which is a lock member Electric motor 28 Body 52 Cam member 54 Gear cover 86 which is a cover member .. Rotation restricting portion 88 .. regulating wall

Claims (1)

The body (28) is movable between a lock position in which the body (28) engages with the steering interlocking member (23) that rotates according to the steering operation and an unlock position in which the engagement is released. and a locking member (25) supported by and biased toward the unlocking position, and the locking member (25) being driven between the unlocking position and the locking position. A cam member (52) interlocked and connected to the member (25), an electric motor (26) capable of exerting power for rotationally driving the cam member (52), and the lock member (25) and a cover member (54) attached to the body (28) so as to cover the cam member (52),
A regulating wall (88) arranged on an extension of the direction of movement of the lock member (25) between the lock position and the unlock position is a movement end of the lock member (25) toward the unlock position. The cover member (54) is provided integrally with the cam member (54) so as to regulate the rotation of the cam member (52). An electric steering lock device characterized by:

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