JP2020175840A - Electric steering lock device - Google Patents

Abstract

To improve assemblability of a seal member in an electric steering lock device in which the seal member is mediated between a body and a lock member movable between a lock position engaging with a steering linkage member turning in accordance with steering operation and an unlock position releasing the engagement and slidably supported by the body.SOLUTION: A body 28 is provided with a support hole 31 slidably engaging a lock member 25 and a seal storage recess 33 which follows coaxially an end part on a steering linkage member 23 side of the support hole 31 and is opened to the steering linkage member 23 side. A seal cover 34 which sandwiches, with the body 28, a seal member 32 stored in the seal storage recess 33 so as to squash the seal member inside the seal storage recess 33 to be slid against an outer peripheral surface of the lock member 25, is fitted to a wall surface 35 facing the steering linkage member 23 side of the body 28.SELECTED DRAWING: Figure 3

Description

The present invention is slidable on the body by allowing it to move between the lock position that engages the steering interlocking member that rotates in response to the steering operation and the unlock position that disengages the engagement. An electric motor including a lock member supported by the body, an electric motor supported by the body capable of exerting power to drive the lock member, and a seal member interposed between the body and the lock member. Regarding the steering lock device.

An annular seal member is provided between the body and the lock member in order to prevent water from entering the body from the outside through a gap between the body and the lock member and adversely affecting electric parts such as an electric motor. The electric steering lock device is known in Patent Document 1 and the like.

JP-A-2018-144550

In the one disclosed in Patent Document 1, an annular recess for mounting an annular seal member is formed on the inner peripheral surface of a support hole provided in the body so that the lock member is slidably fitted. The seal member is assembled to the annular recess by press-fitting it so as to be screwed in, and there is a problem in the assembling property of the seal member to the body.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide an electric steering lock device in which the assembling property of a seal member is improved.

In order to achieve the above object, the present invention moves between the body and the lock position that engages with the steering interlocking member that rotates in response to the steering operation, and the unlock position that releases the engagement. A lock member slidably supported by the body, an electric motor supported by the body capable of exerting power to drive the lock member, and an interposition between the body and the lock member. In the electric steering lock device including the seal member, the support hole for slidably fitting the lock member to the body and the end of the support hole on the steering interlocking member side are coaxially connected to each other. A seal accommodating recess that opens to the steering interlocking member side is provided, and the seal member accommodated in the seal accommodating recess is crushed in the seal accommodating recess so as to be slidably contacted with the outer peripheral surface of the lock member. The first feature is that the seal cover sandwiched between the body and the body is attached to the wall surface of the body facing the steering interlocking member side.

Further, in the second aspect of the present invention, in addition to the configuration of the first feature, the outer surface of the seal cover facing the steering interlocking member side is formed in a shape conforming to the outer surface shape of the steering interlocking member. It is a feature.

The steering shaft 23 of the embodiment corresponds to the steering interlocking member of the present invention, and the lock pin 25 of the embodiment corresponds to the lock member of the present invention.

According to the first feature of the present invention, by attaching the seal cover to the wall surface of the body with the seal member housed in the seal housing recess, the seal member is crushed in the seal housing recess and the outer peripheral surface of the lock member is crushed. It is sandwiched between the body and the seal cover so as to be in sliding contact with the seal member, and when assembling the seal member, the seal member only needs to be inserted into the seal accommodating recess, and the assembling property of the seal member can be improved.

Further, according to the second feature of the present invention, the outer surface of the seal cover facing the steering interlocking member side follows the outer surface shape of the steering interlocking member, so that the seal cover is brought closer to the steering interlocking member and the steering interlocking is performed. The gap between the member and the seal cover can be kept small, and it is possible to prevent the lock member from being easily operated or destroyed from the outside to release the steering lock state, thereby improving the anti-theft property. it can.

It is a perspective view of the electric steering lock device. It is an exploded perspective view of the electric steering lock device. FIG. 3 is a sectional view taken along line 3-3 of FIG. FIG. 3 is a sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. It is a perspective view of the electric steering lock device in a state where a seal member and a seal cover are removed. It is a top view of the electric steering lock device in a state where the upper cover and the gear cover are removed. It is a perspective view which looked at the slider from diagonally above. It is a perspective view seen from diagonally below the slider. It is an exploded perspective view which looked at the worm wheel and a cam member from diagonally above. It is an exploded perspective view which looked at the worm wheel and a cam member from diagonally below. It is a perspective view which looked at the gear cover from below. It is a perspective view of the gear cover seen from the direction of arrow 13 of FIG. It is an exploded perspective view of a switch slider and a coil spring. It is a figure which shows the relative position of a lock pin, a slider, a cam member, and a switch slider in a state where a lock pin is in an unlock position. It is a figure which shows the relative position of a lock pin, a slider, a cam member, and a switch slider in a state where a lock pin starts moving to a lock position side. It is a figure which shows the relative position of a lock pin, a slider, a cam member, and a switch slider in a state where a lock pin has a full stroke toward the lock position side. FIG. 5 is a cross-sectional view corresponding to FIG. 5 in a state where the lock pin has a full stroke toward the lock position side. It is a figure which shows the relative position of a lock pin, a slider, a cam member, and a switch slider in a state which holds the lock position of a lock pin.

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

With reference to FIGS. 2 to 5, the steering shaft 23 as a steering interlocking member that rotates in response to the steering operation can be rotated in the head pipe 22 that forms a part of the vehicle body frame 21. The electric steering lock device is inserted, and 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 the casing 24 so as to enable linear reciprocating movement between the fixed casing 24, the lock position that engages with the steering shaft 23, and the unlock position that disengages the engagement. A lock pin 25 which is a lock member, an electric motor 26 which is fixed in the casing 24 so as to exert power to drive the lock pin 25, and a lock pin 25 which rotates the electric motor 26. A motion conversion mechanism 27 interposed between the electric motor 26 and the lock pin 25 is provided in the casing 24 so as to convert the linear motion of the above.

The casing 24 includes 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 is located at a position spaced from the first wall portion 28aa so as to sandwich the first wall portion 28aa facing the head pipe 22 side and the first wall portion 28aa with the head pipe 22. It is formed so as to integrally have a side wall 28a having a second wall portion 28ab arranged in an endlessly continuous structure and an intermediate wall 28b connected to the inner circumference of a portion of the side wall 28a near the lower end.

The first wall portion 28aa of the side wall 28a of the body 28 is provided with a support hole 31 extending in a direction orthogonal to the axis of the steering shaft 23, and the lock position and the lock position and the support hole 31 are provided in the support hole 31. The lock pin 25 is slidably fitted to enable linear movement between the unlock positions, and a seal member 32 formed in an annular shape, for example, is interposed between the body 28 and the lock pin 25. Will be done.

With reference to FIG. 6, the first wall portion 28aa of the body 28 has a seal coaxially connected to the end of the support hole 31 on the steering shaft 23 side and opened to the steering shaft 23 side. A storage recess 23 is provided, and the seal storage recess 23 is formed in an annular shape corresponding to the seal member 32, and the seal member 32 is housed in the seal storage recess 33. Moreover, a seal cover 34 is attached to the wall surface 35 of the body 28 facing the steering shaft 23 side of the first wall portion 28aa, for example, by a pair of first screw members 36, and the seal cover 34 is attached. When attached to the wall surface 35 of the body 28, the seal member 32 accommodated in the seal accommodating recess 33 is crushed in the seal accommodating recess 33 so as to be slidably contacted with the outer peripheral surface of the lock pin 25. It is sandwiched between the body 28 and the body 28.

A pair of positioning protrusions 37 arranged around the seal accommodating recesses 33 are projected from the wall surface 35 of the body 28, and a pair of positioning recesses 38 for fitting the positioning protrusions 37 are the seals. The seal cover 34 formed on the cover 34 and in a state where the positioning protrusion 37 is fitted into the positioning recess 38 is attached to the wall surface 35 of the body 28 by a pair of the 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 that follows the outer surface shape of the steering shaft 23. That is, it is formed so as 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 in the locked position, and is formed in a locking recess 40 formed on the outer surface of the steering shaft 23. Engagement of one end of the lock pin 25 prevents the steering shaft 23 from rotating, resulting in a steering lock state.

With reference 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, which is a motor arranged above the intermediate wall 28b. The accommodating recess 44 is formed so as to open to the upper cover 29 side, and the electric motor 26 around which the felt 45 is wound has its rotation axis parallel to the moving direction of the lock pin 25. Be housed. 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 the upper portion. It is fixed to the casing 24 by being sandwiched between the bulging portion 29a of the cover 29 and the body 28.

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

The motion conversion mechanism 27 is housed in the gear chamber 48, and the motion conversion mechanism 27 includes a worm 50 provided on the output shaft 46 of the electric motor 26, a worm wheel 51 that meshes with the worm 50, and the worm. 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 are provided, and are arranged below the upper cover 29 so as to cover the motion conversion mechanism 27. The gear cover 54 (see FIGS. 4 and 5) is attached to the body 28 by a second screw member 56 (see FIG. 2) screwed into a pair of screw holes 55 provided in the body 28.

With reference to FIGS. 8 and 9, the slider 53 is a pair of side plate portions that are arranged so as to face each other along a plane orthogonal to the rotation axis of the electric motor 26 and at intervals in the direction along the rotation axis. The connecting plate portion 53b that connects the 53a and the upper portions of the side plate portions 53a and the pair of side plate portions 53a are connected at right angles to the ends of the pair of the side plate portions 53a on the opposite side of the lock pin 25 and extend in a direction that separates from each other. A pair of overhanging plate portions 53c, a connecting portion 53d that connects the pair of side plate portions 53a to each other on the end side opposite to the lock pin 25, and a downward projecting portion 53e that projects downward from the connecting portion 53d. And integrally.

As shown in FIG. 3, the guide groove 57 connected to the support hole 31 is opened upward in the intermediate wall 28b of the body 28 while having a width larger than the inner diameter of the support hole 31. A part of the pair of side plate portions 53a included in the slider 53 is slidably fitted into the guide groove 57.

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 protruding from the insertion portion 25a on both sides are provided. The side plate portion 53a of the slider 53 is integrally formed, and a locking recess 58 opened downward so as to insert and engage the engaging arm portion 25b is formed in each of the side plate portions 53a. Moreover, a rod-shaped first spring guide 59 projecting from the insertion portion 25a of the lock pin 25 is projected from the connecting portion 53d of the slider 53, and the first spring guide 59 is projected from the insertion portion 25a. A first spring accommodating recess 60 corresponding to the above is formed.

A first coil spring 61 is reduced between the insertion portion 25a of the lock pin 25 and the connecting portion 53d of the slider 53, and a part thereof is accommodated in the first spring accommodating recess 60. The other end of the first coil spring 61 whose one end is brought into contact with the insertion portion 25a is brought into contact with the connecting portion 53d while surrounding the first spring guide 59. The lock pin 25 is urged by the first coil spring 61 so that the engaging arm portion 25b abuts on the side edge of the locking recess 58 on the steering shaft 23 side.

Further, a rod-shaped second spring guide 62 projecting in the same direction as the first spring guide 59 is projected from the pair of overhanging plate portions 53c provided by the slider. On the other hand, the body 28 is formed with a pair of second spring accommodating recesses 63 corresponding to the second spring guide 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, and a part of the second coil spring 64 is provided in the second spring accommodating recess 63. The other end of the second coil spring 64 whose one end is brought into contact with the body 28 so as to be accommodated is brought into contact with the overhang plate portion 53c while surrounding the second spring guide 62. To. By the second coil spring 64, the slider 53 is urged to the side where the lock pin 25 is in the unlock position.

For assembling and removing the lock pin 25 and the slider 53 to the body 28, the portion of the second wall portion 28ab of the body 28 corresponding to the lock pin 25 and the slider 53 is located downward. An open rectangular notch 67 is formed. In order to close the notch 67, the lower cover 30 is upward from the flat plate portion 30a so as to close the flat plate portion 30a corresponding to the side wall 28a of the body 28 and the notch 67 of the side wall 28a. It is formed so as to integrally have a vertical plate portion 30b protruding from the surface.

An endlessly continuous upper seal member 69 is interposed between the body 28 and the upper cover 29 so as to be fitted in the upper seal groove 68 formed at the upper end of the side wall 28a in the body 28. The upper cover 29 is fastened to the body 28 with a plurality of, for example, four third screw members 70. Further, between the body 28 and the lower cover 30, an endless lower seal member 72 is interposed in a lower seal groove 71 formed at 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 by a plurality of, for example, four fourth screw members 73 (see FIG. 2).

Further, a circuit board 76 is fastened to the lower cover 30 by, for example, two fifth screw members 75 (see FIG. 2), and a plurality of electric components mounted on the circuit board 76 and the electric motor 26. A connector 77 for providing an electrical connection with the lower cover 30 is assembled to the lower cover 30, and the connector 77 is fastened to the side wall 28a 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 in conjunction with each other. The support shaft 79 is located at a position offset laterally from the extension line in the moving direction of the lock pin 25, and in this embodiment, the side opposite to the electric motor 26 with respect to the lock pin 25 and the slider 53. One end is fitted to the body 28 by being arranged at a position offset toward the side. In this embodiment, the support shaft 79 is made of metal, but is made of resin for cost reduction. It is also possible.

The cam member 52 is arranged below the worm foil 51 with respect to the worm foil 51 and a cam member 52 formed smaller in the radial direction than the worm foil 51 and interlocked with and connected to the worm foil 51. In this way, a part of the cam member 52 is arranged above the slider 53 while being partially overlapped with the connecting plate portion 53b of the slider 53 when viewed from the direction along the axis of the support shaft 79. Will be done.

With reference to FIGS. 10 and 11, the worm foil 51 includes a disk portion 51a, a cylindrical portion 51b connected at right angles to the outer peripheral edge of the disk portion 51a, and a lower surface of the disk portion 51a. It has an arcuate protrusion 51c that protrudes downward from the outer peripheral portion of substantially half of the circumference and whose both ends in the circumferential direction are connected to the inner circumference of the cylindrical portion 51b, and meshes with the worm 50 on the outer peripheral portion of the cylindrical portion 51b. The oblique teeth 80 are formed.

Further, the cam member 52 is arranged below the disk portion 51a of the worm foil 51, and is formed with a disc-shaped base portion 52a having a diameter smaller than that of the disk portion 51a of the worm foil 51. And the protrusion 52b that projects laterally from the outer circumference of the base 52a about half a circumference and protrudes downward from the base 52a, and the outer circumference of the lower surface of the base 52a from the inner circumference of one end in the circumferential direction of the protrusion 52b. It is formed so as to integrally have an arc-shaped extending 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. 10 and 11, and the extension portion 52c is locked. It extends from the front end of the protrusion 52b in the position-side rotation direction 81.

In the lower part of the worm foil 51, the portion of the cylindrical portion 51b excluding the arc-shaped protrusion 51c and the arc-shaped 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 central hole 83 through which the support shaft 79 is inserted is formed in the center of the disk portion 51a of the worm foil 51, and a central hole 84 corresponding to the central hole 83 is also formed in the base portion 52a of the cam member 52. It is formed so as to insert the support shaft 79.

By the way, the slider 53 interlocked with and connected to the lock pin 25 is pressed and driven by the cam member 52 when the lock pin 25 is moved from the unlock position to the lock position, and the connection in the slider 53. The lock pin drive unit 85 capable of contacting the pressure receiving projection 53f projecting from the end of the plate portion 53b on the lock pin 25 side responds to the rotation of the cam member 52 in the lock position side rotation direction 81. A pressing force is applied to the pressure receiving protrusion 53f so as to be provided at the front end of the protruding portion 52b of the cam member 52 along the lock position side rotation direction 81.

With reference to FIGS. 12 and 13, the other end of the support shaft 79 whose one end 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. , The boss portion 54a to be supported is projected. Further, a rotation restricting portion 86 projecting outward in the radial direction from the boss portion 54a is integrally provided on the lower surface of the gear cover 54.

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

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

Further, a positioning protrusion 91 is projected on the upper surface of the protrusion 52b of the cam member 52 at a position where the central hole of the cam member 52 is sandwiched between the cam member 52 and the regulated portion 89, and the positioning protrusion 91 is provided. Is inserted into the second through hole 92 formed in the disk portion 51a of the worm foil 51.

Further, on the lower surface of the gear cover 54, a worm cover 87 for covering the worm 50 from above and preventing the worm 50 from rising is integrated so as to have a substantially U-shaped cross-sectional shape that opens downward. Is formed in.

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

As shown in FIG. 4, the first and second upper surfaces of the circuit board 76 fastened to the upper surface of the flat plate portion 30a of the lower cover 30 are spaced along the moving direction of the slider 53. Hall ICs 94 and 95 are installed. On the other hand, the downward projecting portion 53e of the slider 53 projects toward the circuit board 76 from the opening 96 formed in the intermediate wall 28b of the body 28, and the magnet housing formed in the downward projecting portion 53e. The magnet 98 is housed in the recess 97, and the magnet holder 99 for holding the magnet 98 in the downward protrusion 53e is elastically engaged with the downward protrusion 53e.

Thus, the first hole IC 94 detects that the lock pin 25 is in the unlocked position due to the proximity of the magnet 98 when the lock pin 25 is in the unlocked position. The second hole IC 95 detects that the lock pin 25 is in the lock position by bringing the magnet 98 close to the lock pin 25 when the lock pin 25 is in the lock position.

Further, as shown in FIG. 5, a microswitch 100 for detecting the rotation position of the worm wheel 51 and the cam member 52 is attached to the circuit board 76. Further, the switch slider 101 that changes the switching mode of the micro switch 100 according to the rotation of the cam member 52 can slide while being urged toward the cam member 52, and the cam member 52 and the micro It 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, in a direction along the rotation axis. It is arranged between the cam member 52 and the microswitch 100.

With reference to FIG. 14, the switch slider 101 includes a slider main portion 101a having a contact portion 102 at the tip end portion on the cam member 52 side, and a pair of arm portions protruding from the slider main portion 101a on both sides. It is formed so as to have 101b integrally.

On the other hand, in the portion of the body 28 corresponding to the microswitch 100 of the intermediate wall 28b, a slide hole 103 into which the slider main portion 101a is slidably fitted and a cam arranged on both sides of the slide hole 103. A pair of third spring accommodating recesses 104 open to the member 52 side and a slit 105 connecting the slide hole 103 and the third spring accommodating recess 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 projects toward the third spring accommodating recess 104 side. A third spring guide 106 projecting toward the inside of the third spring accommodating recess 104 is projected from the arm portion 101b so as to surround the third spring guide 106 on one end side. A pair of third coil springs 107 housed in the third spring accommodating recess 104 are contracted between the arm portion 101b and the body 28, and the switch slider 101 is provided by the third coil spring 107. Is urged toward the cam member 52 side.

The cam member 52 is provided with a switch slider driving unit 108 that drives the switch slider 101 in response to the rotation of the cam member 52. As shown in FIGS. 10 and 11, the switch slider drive unit 108 is provided on the protruding portion 52b and the extending portion 52c of the cam member 52, and the protruding portion 52b is rotated toward the lock position. It includes 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 inclined so as to be gradually lowered toward the front side along the lock position side rotation direction 81, and the second slope 110 is formed in the lock position side rotation direction. It is formed so as to be gradually inclined upward 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 protrusion 52b, the lower surface of the extension portion 52c, and the second slope 110. At least a part of the 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.

Next, the operating state 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. 15, the lock pin 25 is in the unlocked position and the electric motor 26 In the non-operating state of the cam member 52, that is, in the non-operating state of the cam member 52, the regulated portion 89 of the cam member 52 has a rotation restricting portion 86 of the gear cover 54 with 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 protruding portion 52b of the cam member 52, and is in contact with the micro switch 100 as shown in FIG. It is in.

Next, the operation of the electric motor 26 is started, and as shown in FIG. 16, the cam member 52 is locked to a position where the lock pin drive portion 85 of the cam member 52 is brought into contact with the pressure receiving projection 53f of the slider 53. Even 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 protrusion 52b of the cam member 52, and as shown in FIG. 5, the micro It remains in contact with switch 100.

When the cam member 52 is further rotated in the lock position side rotation direction 81 by the electric motor 26, the pressure receiving projection 53f of the slider 53 is pushed by the lock pin drive unit 85 as shown in FIG. The lock pin 25 will move to the lock 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 from the lower surface of the projecting portion 52b via the first slope 109, and in this state. As shown in FIG. 18, the switch slider 101 changes the switching mode from the on state to the off state of the microswitch 100 apart from the microswitch 100.

Further, the pressure receiving projection 53f of the slider 53 is displaced from the lock pin driving portion 85 to a position where it comes into contact with the outer peripheral surface of the protruding portion 52b, and the lock pin driving portion 85 to the outer peripheral surface of the protruding portion 52b. In order to smoothly displace the contact portion of the pressure receiving protrusion 53f, a guide surface 111 which is a slope is formed between the lock pin driving portion 85 and the outer peripheral surfaces of the protruding portion 52b.

After the second hole IC 95 detects that the lock pin 25 has made a full stroke toward the lock position side, the cam member 52 is moved to the lock position side rotation direction 81 by continuing the operation of the electric motor 26. Further rotating, as shown in FIG. 19, the rotation of the cam member 52 is such that the restricted portion 89 of the cam member 52 is attached to the rotation restricting portion 86 of the gear cover 54 in the lock position side rotation direction 81. The lock position of the lock pin 25 is held by abutting the pressure receiving protrusion 53f of the slider 53 with the outer peripheral surface of the protruding portion 52b of the cam member 52. Further, 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 comes into contact with the micro switch 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 the rotation operation of the electric motor 26 in the opposite direction. The lock pin 25 and the slider 53 will be moved to the unlock position side by the urging force of the second coil switch pulling 64.

Next, the operation of this embodiment will be described. The support hole 31 for slidably fitting the lock pin 25 to the body 28 and the end of the support hole 31 on the steering shaft 23 side are coaxially connected to each other. An annular seal accommodating recess 33 that opens to the steering shaft 23 side is provided, and the annular seal member 32 accommodated in the seal accommodating recess 33 is sealed between the body 28 and the lock pin 25. Since the seal cover 34 sandwiched between the body 28 and the body 28 so as to be crushed in the accommodating recess 33 and slidably contact the outer peripheral surface of the lock pin 25 is attached to the wall surface 35 facing the steering shaft 23 side of the body 28. When assembling the seal member 32, the seal member 32 only needs to be inserted 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 that conforms to the outer surface shape of the steering shaft 23, the seal cover 34 is brought closer to the steering shaft 23 to bring the seal cover 34 closer to the steering shaft 23 and the seal cover. The gap between the 34 can be kept small, and it is possible to prevent the lock pin 25 from being easily operated or destroyed from the outside to release the steering lock state, and it is possible to improve the anti-theft property.

Further, between the lock position and the unlock position of the lock pin 25, the gear cover 54 attached to the body 28 so as to cover a part of the motion conversion mechanism 27 and the lock pin 25 provided between the electric motor 26 and the lock pin 25. Since the regulation wall 88 arranged on the extension line in the movement direction in the above is integrally provided so as to restrict the moving end of the lock pin 25 toward the unlock position side, the cam member 52 can be rotated. Even if the supporting shaft 79 is positioned laterally offset from the extension line in the moving direction of the lock pin 25, the lock pin 25 has a simple structure in which the regulation wall 88 is integrally provided on the gear cover 54. It is possible to receive the impact of the above, and it is possible to avoid the complicated structure and the increase in size due to the shape change of the parts.

Further, since the rotation regulating portion 86 for restricting the rotation of the cam member 52 is integrally provided on the gear cover 54, the gear cover 54 is provided with a movement restricting function of the lock pin 25 and a rotation restricting function of the cam member 52. This makes it possible to prevent the device from becoming larger while avoiding an increase in the number of parts.

Further, a microswitch 100 attached to 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. Since the slider 101 is arranged between the cam member 52 and the microswitch 100 so as to be able to slide while being urged toward the cam member 52, the cam member 52 of the cam member 52 is arranged in a direction along the rotation axis. It is not necessary to arrange a 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, and the switch slider 101 is set. The device can be miniaturized by arranging it close to the cam member 52.

Moreover, the switch slider 101 having an abutting portion 102 that abuts on the cam member 52 can slide in a direction parallel to the rotation axis of the cam member 52, and the cam can slide in a direction along the rotation axis. Since it is arranged between the member 52 and the microswitch 100, 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. The switch slider 101 can be arranged closer to the cam member 52 to further reduce the size of the device.

Further, the lock pin 25 is urged toward the unlock position side, and the worm foil 51 and the worm foil 51 are formed smaller in the radial direction on the support shaft 79 arranged on the side of the lock pin 25. The cam member 52 is rotatably supported so as to rotate in conjunction with the cam member 52, and the lock pin 25 is rotatably supported on the cam member 52 from the unlocked position in accordance with the rotation of the cam member 52. The lock pin drive unit 85 for moving to the lock position, the switch slider drive unit 108 that drives the switch slider 101 in response to the rotation of the cam member 52, and the rotation of the worm wheel 51 and the cam member 52. Since the regulated portion 89 that can come into contact with the rotation restricting 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, it is possible to avoid increasing the size of the worm wheel 51 and reduce the size of the device.

Further, 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 is positioned in the circumferential direction with respect to the worm wheel 51. 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 are made without departing from the present invention described in the claims. Is possible.

For example, in the above-described embodiment, the electric steering lock device in which the lock pin 25 is driven by the cam member 52 that is rotationally driven by the electric motor 26 has been described, but the lock pin 25 is driven by the power exerted by the electric motor 26. The present invention can be applied to any configuration of the motion conversion mechanism provided between the electric motor 26 and the lock pin 25 as long as it drives the motor.

23 ... Steering shaft 25 ... Steering interlocking member ... Lock pin 26 ... Electric motor 28 ... Body 31 ... Support hole 32 ... Seal member 33 ... Seal Containment recess 34 ... Seal cover 34a ... Outer surface 35 facing the steering shaft side of the seal cover ... Wall surface

Claims (2)

The body (28) can be moved between the lock position that engages with the steering interlocking member (23) that rotates in response to the steering operation and the unlock position that releases the engagement. A lock member (25) slidably supported by the body (28), an electric motor (26) supported by the body (28) so as to exert power to drive the lock member (25), and the above. In an electric steering lock device including a body (28) and a seal member (32) interposed between the lock member (25), the lock member (25) is slidably fitted to the body (28). A seal accommodating recess (33) that is coaxially connected to the support hole (31) to be fitted and the end of the support hole (31) on the steering interlocking member (23) side and opens to the steering interlocking member (23) side. ) Is provided, and the seal member (32) accommodated in the seal accommodating recess (33) is crushed in the seal accommodating recess (33) so as to be slidably contacted with the outer peripheral surface of the lock member (25). An electric steering lock device characterized in that a seal cover (34) sandwiched between the body (28) and the body (28) is attached to a wall surface (35) of the body (28) facing the steering interlocking member (23) side. .. Claim 1 is characterized in that the outer surface (34a) of the seal cover (34) facing the steering interlocking member (23) side is formed in a shape that conforms to the outer surface shape of the steering interlocking member (23). The electric steering lock device described in.