JP5266070B2 - Steering lock device - Google Patents

Steering lock device Download PDF

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JP5266070B2
JP5266070B2 JP2009004768A JP2009004768A JP5266070B2 JP 5266070 B2 JP5266070 B2 JP 5266070B2 JP 2009004768 A JP2009004768 A JP 2009004768A JP 2009004768 A JP2009004768 A JP 2009004768A JP 5266070 B2 JP5266070 B2 JP 5266070B2
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lock
holding
lock member
cam
steering shaft
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JP2010162941A (en
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浩一朗 杉本
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Alpha Corp
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Alpha Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a steering locking device capable of unlocking a lock member by relatively small unlocking force, attaining miniaturization of a drive mechanism of the lock member and reducing cost. <P>SOLUTION: The steering locking device has the lock member 5 biased in a direction of a steering shaft by a lock spring 50 and engageable with an engagement projection 20 of the steering shaft 2; and a retaining member 6 for retaining the lock member 5 in locking. An inclination surface 53 for receiving rotation force of the steering shaft 2 is provided on a distal end of the lock member 5, the rotation force is received by the inclination surface 53, and the lock member 5 is biased in an unlocking direction. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、自動車のステアリングシャフトの回転をロックするステアリングロック装置に関する。   The present invention relates to a steering lock device that locks rotation of a steering shaft of an automobile.

この種の従来のステアリングロック装置としては、特許文献１に開示されたものがある。このステアリングロック装置１００は、図１０に示すように、巻バネ１０１により自動車のステアリングシャフト１０２の方向に付勢され、先端がステアリングシャフト１０２の係合穴１０３に対して係合可能なロック部材１０４と、図示しないキースイッチにより回動操作され、ロック部材１０４を駆動するカム部材１０５とを備えている。   A conventional steering lock device of this type is disclosed in Patent Document 1. As shown in FIG. 10, the steering lock device 100 is urged toward the steering shaft 102 of the automobile by a winding spring 101, and a lock member 104 whose tip can be engaged with an engagement hole 103 of the steering shaft 102. And a cam member 105 that is rotated by a key switch (not shown) to drive the lock member 104.

上記構成において、図１０に示す施錠時にロック部材１０４先端がステアリングシャフト１０２の係合穴１０３に対して係合することによりステアリングシャフト１０２の回転が阻止されるので、自動車は操縦不能な状態となる。次いで、キースイッチを差し込んでカム部材１０５を回動操作すると、巻バネ１０１に抗してロック部材１０４が施錠位置から解錠方向（図１０の上方）へ移動する。その結果、ロック部材１０４先端がステアリングシャフト１０２の係合穴１０３から離脱するので、ステアリングシャフト１０２の回転が自由となり、自動車は操縦可能な状態となる。   In the above configuration, when the locking member 104 is locked as shown in FIG. 10, the front end of the lock member 104 is engaged with the engagement hole 103 of the steering shaft 102, thereby preventing the steering shaft 102 from rotating. . Next, when the key switch is inserted and the cam member 105 is rotated, the lock member 104 moves from the locking position to the unlocking direction (upward in FIG. 10) against the winding spring 101. As a result, the distal end of the lock member 104 is disengaged from the engagement hole 103 of the steering shaft 102, so that the steering shaft 102 can freely rotate and the vehicle can be steered.

特開２００８−１４９９４７号公報JP 2008-149947 A

しかしながら、従来のステアリングロック装置１００では、施錠時にステアリングシャフト１０２の回転力でロック部材１０４の先端が押圧されため、ロック部材１０４を解錠状態へ移動させるのに大きな力を有し、このロック部材１０４の解錠力向上のために駆動機構が大型化するのでコストがかさむという問題があった。   However, the conventional steering lock device 100 has a large force to move the lock member 104 to the unlocked state because the distal end of the lock member 104 is pressed by the rotational force of the steering shaft 102 at the time of locking. In order to improve the unlocking power of 104, the drive mechanism is enlarged, and there is a problem that the cost is increased.

そこで、本発明は、比較的小さい解錠力でロック部材を施錠位置から解錠方向へ移動させることができ、ロック部材を駆動する駆動機構のコンパクト化を図ってコストを削減することができるステアリングロック装置を提供することを目的とする。   Therefore, the present invention can move the lock member from the locked position in the unlocking direction with a relatively small unlocking force, and can reduce the cost by reducing the size of the drive mechanism that drives the lock member. An object is to provide a locking device.

上記目的を達成する請求項１の発明は、施錠位置と解錠位置との間を移動自在に配置されたロック部材と、該ロック部材を該施錠位置と該解錠位置との間で移動させるロックスライド手段とを備え、該施錠位置では、該ロック部材の先端がステアリングシャフトの外周に径方向に向かって突設された係合突部と係合して該ステアリングシャフトの回動を規制し、該解錠位置では、該ロック部材の先端が該係合突部から離間して該ステアリングシャフトの回動を許可するステアリングロック装置であって、前記ロック部材の先端に該ロック部材の移動方向に対して斜めに形成される傾斜面と、前記施錠位置に位置する該ロック部材と係合し、該ロック部材の前記解錠位置への移動を規制する保持位置と、該ロック部材との係合が解除され、該ロック部材の解錠位置への変位を許可する保持解除位置との間で移動自在に配置された保持部材と、該保持部材を該保持位置と該保持解除位置との間で変位させる保持移動手段とを備え、前記ロックスライド手段が、弾性材からなるロック付勢手段と、略円盤形状を有し、外周縁に位置するロックカム部にカム面が形成されたロックカムとから構成され、前記保持移動手段が、弾性材からなる保持付勢手段と、略円盤形状を有し、外周縁に位置する保持カム部にカム面が形成された保持カムとから構成され、前記ステアリングシャフトが回動した際に、前記係合突部によって該施錠位置に位置する該ロック部材の該傾斜面が押圧され、該ロック部材が解錠方向へ付勢され、該ロック付勢手段によって前記ロック部材がステアリングシャフトに向かって該ロックカム部上に付勢保持されつつ、該ロックカムが回動することによって、該ロック部材が施錠位置と解錠位置との間を移動し、該保持付勢手段によって前記保持部材がロック部材に向かって該保持カム部上に付勢保持されつつ、該保持カムが回動することによって、該保持部材が保持位置と保持解除位置との間を移動することを特徴とする。 According to the first aspect of the invention for achieving the above object, the lock member is movably disposed between the lock position and the unlock position, and the lock member is moved between the lock position and the unlock position. Locking slide means, and at the locking position, the front end of the lock member engages with an engagement protrusion projecting radially on the outer periphery of the steering shaft to restrict rotation of the steering shaft. The locking member is a steering lock device in which the tip of the lock member is separated from the engagement protrusion to permit the rotation of the steering shaft in the unlocked position, and the moving direction of the lock member is on the tip of the lock member. A locking surface that is formed obliquely with respect to the locking member, engages with the locking member positioned at the locking position, and restricts movement of the locking member to the unlocking position. Is canceled and the A holding member that is movably disposed between a holding release position that permits displacement of the hook member to the unlocking position, and a holding movement means that displaces the holding member between the holding position and the holding release position. The lock slide means comprises a lock biasing means made of an elastic material, and a lock cam having a substantially disk shape and having a cam surface formed on a lock cam portion located on the outer peripheral edge, and the holding movement The means comprises a holding biasing means made of an elastic material, and a holding cam having a substantially disc shape and having a cam surface formed on a holding cam portion located on the outer peripheral edge, and when the steering shaft rotates Further, the inclined surface of the lock member positioned at the locking position is pressed by the engaging protrusion, the lock member is urged in the unlocking direction, and the lock urging means is applied to the steering shaft. For Thus, the lock cam is rotated while being biased and held on the lock cam portion, so that the lock member moves between the locked position and the unlocked position, and the holding member is locked by the holding biasing means. The holding member moves between a holding position and a holding release position by rotating the holding cam while being biased and held on the holding cam portion toward the member .

請求項２の発明は、請求項１記載のステアリングロック装置であって、前記ロック部材を駆動するロックカムと、前記保持部材を駆動する保持カムとを同軸上に一体に設けたことを特徴とする。 A second aspect of the present invention, there is provided a steering lock device according to claim 1, and a locking cam for driving the locking member, characterized in that provided integrally with the holding cam for driving the holding member coaxially .

請求項１の発明によれば、施錠時にロック部材の先端がステアリングシャフトの係合突部に対して係合することにより、ステアリングシャフトの回転が阻止されるので、自動車は操縦不能な状態となる。このとき、ステアリングシャフトの回転力をロック部材の先端の傾斜面で受けることにより、該ロック部材が解錠方向へ付勢されるが、保持部材によりロック部材が施錠位置で保持されている。次いで、解錠時に保持部材によるロック部材の保持が解除されるので、前記回転力をロック部材の先端の傾斜面で受けることにより、ロック部材が解錠方向へ付勢される。さらにロック部材が解錠方向へ付勢されることにより、ロック部材がロック付勢手段に抗して解錠方向へ移動する結果、ロック部材の先端がステアリングシャフトの係合突部から離脱するので、ステアリングシャフトの回転が自由となり、自動車は操縦可能な状態となる。   According to the first aspect of the present invention, when the lock member is locked, the front end of the lock member is engaged with the engaging protrusion of the steering shaft, so that the rotation of the steering shaft is prevented. . At this time, the locking member is biased in the unlocking direction by receiving the rotational force of the steering shaft at the inclined surface at the tip of the locking member, but the locking member is held in the locking position by the holding member. Next, since the holding of the lock member by the holding member is released at the time of unlocking, the lock member is biased in the unlocking direction by receiving the rotational force on the inclined surface at the tip of the lock member. Further, when the lock member is biased in the unlocking direction, the lock member moves in the unlocking direction against the lock biasing means. As a result, the tip of the lock member is detached from the engaging protrusion of the steering shaft. The rotation of the steering shaft becomes free, and the vehicle is in a steerable state.

これにより、比較的小さい解錠力でロック部材を施錠位置から解錠方向へ移動させることができ、ロック部材の駆動機構のコンパクト化を図ってコストを削減することができる。   As a result, the lock member can be moved in the unlocking direction from the lock position with a relatively small unlocking force, and the drive mechanism of the lock member can be made compact and the cost can be reduced.

また、ロック部材に作用する解錠方向への付勢力、つまり保持部材に作用する力は、ステアリングシャフトの回動方向に対する傾斜面の角度に作用する分力なので、ステアリングシャフトの回動方向に作用する回転力よりも小さくてすむため、保持部材の強度を抑えつつ、施錠時には保持部材によりロック部材を確実に保持することができる。   Further, the urging force acting on the lock member in the unlocking direction, that is, the force acting on the holding member is a component force acting on the angle of the inclined surface with respect to the turning direction of the steering shaft, and thus acts on the turning direction of the steering shaft. Therefore, the lock member can be reliably held by the holding member during locking while suppressing the strength of the holding member.

加えて、ロックスライド手段をロック付勢手段と、ロックカムとで構成するとともに、保持移動手段を保持付勢手段と、保持カムとで構成することで、比較的単純な構成でロックスライド手段と保持移動手段とを構成することができる。 In addition , the lock slide means comprises a lock urging means and a lock cam, and the holding movement means comprises a holding urging means and a holding cam, so that the lock slide means and the holding can be held with a relatively simple structure. The moving means can be configured.

請求項２の発明によれば、請求項１の発明の効果に加え、ロックカムと保持カムを一体的に設けたので、ロック部材と保持部材とを駆動する駆動機構のコンパクト化をさらに図ることができる。 According to the invention of claim 2 , in addition to the effect of the invention of claim 1 , since the lock cam and the holding cam are integrally provided, the drive mechanism for driving the lock member and the holding member can be further downsized. it can.

本発明の一実施形態を示し、ステアリングロック装置の施錠状態を示す断面図である。It is sectional drawing which shows one Embodiment of this invention and shows the locking state of a steering lock apparatus. 本発明の一実施形態を示し、施錠時にステアリングシャフトが回転した状態を示す断面図である。It is sectional drawing which shows one Embodiment of this invention and shows the state which the steering shaft rotated at the time of locking. 本発明の一実施形態を示し、保持部材によるロック部材の保持を解除した状態を示す断面図である。It is sectional drawing which shows one Embodiment of this invention and shows the state which cancelled | released holding | maintenance of the locking member by a holding member. 本発明の一実施形態を示し、ステアリングロック装置の解錠状態を示す断面図である。It is sectional drawing which shows one Embodiment of this invention and shows the unlocking state of a steering lock apparatus. 本発明の一実施形態を示し、ロック部材の先端がステアリングシャフトの係合突部に乗り上げた状態を示す断面図である。FIG. 5 is a cross-sectional view illustrating a state in which the distal end of the lock member rides on the engaging protrusion of the steering shaft according to the embodiment of the present invention. 本発明の一実施形態を示し、図２のロック部材先端の部分を拡大して示す断面図である。FIG. 3 shows an embodiment of the present invention, and is an enlarged cross-sectional view showing a front end portion of the lock member in FIG. 2. 本発明の一実施形態を示し、ステアリングロック装置の施錠状態を示す他の断面図である。FIG. 6 is another cross-sectional view showing the locked state of the steering lock device according to the embodiment of the present invention. 本発明の一実施形態を示し、ステアリングロック装置の施錠状態を示す斜視図である。It is a perspective view which shows one Embodiment of this invention and shows the locking state of a steering lock apparatus. 本発明の一実施形態を示し、ステアリングロック装置の解錠状態を示す斜視図である。It is a perspective view which shows one Embodiment of this invention and shows the unlocking state of a steering lock apparatus. 従来例のステアリングロック装置を示す断面図である。It is sectional drawing which shows the steering lock apparatus of a prior art example.

以下、本発明の実施形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１〜図９に示すように、本実施形態のステアリングロック装置１は、自動車のステアリングシャフト２を収容するステアリングコラム装置（図示せず）に取付けられるハウジング３と、このハウジング３に設けられ、施錠位置と解錠位置との間を移動自在に配置されたロック部材５と、ロック部材５を施錠位置と解錠位置との間で移動させるロックスライド手段７と、保持位置と保持解除位置との間で移動自在に配置された保持部材６と、保持部材６を保持位置と保持解除位置との間で変位させる保持移動手段８とを備えている。   As shown in FIGS. 1 to 9, the steering lock device 1 of the present embodiment is provided in a housing 3 attached to a steering column device (not shown) that houses a steering shaft 2 of an automobile, and the housing 3. A lock member 5 movably arranged between a locking position and an unlocking position; a lock slide means 7 for moving the locking member 5 between the locking position and the unlocking position; a holding position and a holding releasing position; And a holding movement means 8 for displacing the holding member 6 between a holding position and a holding release position.

ステアリングシャフト２には、軸方向に延びる複数の係合突部２０を外周に有し、隣り合う係合突部２０間に、ロック部材５の先端が挿入される係合凹部２１が形成されている。   The steering shaft 2 has a plurality of engagement projections 20 extending in the axial direction on the outer periphery, and an engagement recess 21 into which the tip of the lock member 5 is inserted is formed between adjacent engagement projections 20. Yes.

ロック部材５は、ハウジング３に設けられたロック収容孔３１内に移動可能に配設されている。ロック収容孔３１は、ステアリングシャフト２の軸方向に対して垂直な方向（径方向Ｒ）に沿ってハウジング３の外周と内部の収容室３２とを貫通するように形成されている。ロック部材５は、その先端に、ロック部材５の移動方向（径方向Ｒ）に対して斜めに形成される傾斜面５３と、その基端に径方向Ｒに対して直交する方向に延設された腕部５１と、径方向Ｒの中間部に係合凹部２１とを備えている。傾斜面５３は、ステアリングシャフト２の係合突部２０に面するロック部材５先端の両側に設けられており、すなわち、ロック部材５の先端はくさび状に形成されている。なお、図７に示すように、ロック部材５先端の軸方向の幅は、一定の寸法で設定されている。   The lock member 5 is movably disposed in a lock accommodation hole 31 provided in the housing 3. The lock accommodating hole 31 is formed so as to penetrate the outer periphery of the housing 3 and the inner accommodating chamber 32 along a direction perpendicular to the axial direction of the steering shaft 2 (radial direction R). The lock member 5 has an inclined surface 53 formed obliquely with respect to the moving direction (radial direction R) of the lock member 5 and a base end thereof extending in a direction perpendicular to the radial direction R. The arm 51 and the engagement recess 21 are provided in the intermediate portion in the radial direction R. The inclined surfaces 53 are provided on both sides of the front end of the lock member 5 facing the engaging protrusion 20 of the steering shaft 2, that is, the front end of the lock member 5 is formed in a wedge shape. In addition, as shown in FIG. 7, the width | variety of the axial direction of the lock member 5 front-end | tip is set with the fixed dimension.

ロックスライド手段７は、ロック付勢手段として弾性材からなるロックバネ５０と、略円盤形状を有し、外周縁に位置するロックカム部４０ａにカム面が形成されたロックカム４０とから構成されている。また、ロックカム４０はカム体４を構成している。ロック部材５の腕部５１は、ロックカム部４０ａのカム面上に配設され、ロックバネ５０によってステアリングシャフト２の方向に付勢されている。そして、ロックカム４０が回転することで、ロック部材５が施錠位置と解錠位置との間を移動する。   The lock slide means 7 includes a lock spring 50 made of an elastic material as a lock urging means, and a lock cam 40 having a substantially disk shape and having a cam surface formed on a lock cam portion 40a located on the outer peripheral edge. Further, the lock cam 40 constitutes the cam body 4. The arm portion 51 of the lock member 5 is disposed on the cam surface of the lock cam portion 40 a and is urged toward the steering shaft 2 by the lock spring 50. Then, as the lock cam 40 rotates, the lock member 5 moves between the locked position and the unlocked position.

なお、施錠位置では、ロック部材５の先端がステアリングシャフト２の係合突部２０と係合してステアリングシャフト２の回動を規制し、解錠位置では、ロック部材５の先端が係合突部から離間して、ロック収容孔３１内に収容され、ステアリングシャフト２の回動を許可する。   In the locking position, the front end of the lock member 5 engages with the engagement protrusion 20 of the steering shaft 2 to restrict the rotation of the steering shaft 2, and in the unlocked position, the front end of the lock member 5 engages with the engagement protrusion. The steering shaft 2 is allowed to rotate by being separated from the portion and housed in the lock housing hole 31.

保持部材６は、ハウジング３に設けられた保持収容孔３３内に移動可能に配設されている。保持収容孔３３は、ロック収容孔３１に直交するようにハウジング３に形成されている。保持部材６は、断面Ｌ字形状に折り曲げた板部材から構成され、一端が保持カム４１に係合する基板部６０と、ロック部材５の係合溝５２に係合可能な係合板部６１とを備えている。   The holding member 6 is movably disposed in a holding accommodation hole 33 provided in the housing 3. The holding accommodation hole 33 is formed in the housing 3 so as to be orthogonal to the lock accommodation hole 31. The holding member 6 is composed of a plate member bent into an L-shaped cross section, and has a base plate portion 60 whose one end engages with the holding cam 41, and an engagement plate portion 61 that can engage with the engagement groove 52 of the lock member 5. It has.

保持移動手段８は、保持付勢手段として弾性材からなる保持バネ６２と、ロックカム４０と同軸上に一体に形成された略円盤形状を有し、外周縁に位置する保持カム部４１ａにカム面が形成された保持カム４１とから構成されている。つまり、保持カム４１はロックカム４０とともにカム体４を構成している。保持部材６の基板部６０は、その先端が保持カム部４１ａのカム面上に配設され、保持バネ６２によってロック部材５の方向に付勢されている。そして、保持カム４１がロックカム４０とともに回転することで、保持部材６が保持位置と保持解除位置との間を移動する。   The holding movement means 8 has a holding spring 62 made of an elastic material as a holding biasing means and a substantially disk shape formed integrally with the lock cam 40 on the same axis, and has a cam surface on the holding cam portion 41a located on the outer peripheral edge. The holding cam 41 is formed. That is, the holding cam 41 constitutes the cam body 4 together with the lock cam 40. The substrate portion 60 of the holding member 6 has its tip disposed on the cam surface of the holding cam portion 41 a and is urged toward the lock member 5 by a holding spring 62. Then, when the holding cam 41 rotates together with the lock cam 40, the holding member 6 moves between the holding position and the holding release position.

なお、保持位置では、施錠位置に位置するロック部材５の係合凹部２１と係合し、ロック部材５の解錠位置への移動を規制し、保持解除位置では、係合凹部２１との係合が解除され、ロック部材５の解錠位置への変位を許可する。   In the holding position, it engages with the engaging recess 21 of the lock member 5 located in the locking position, restricts the movement of the lock member 5 to the unlocking position, and in the holding release position, it engages with the engaging recess 21. The combination is released, and the displacement of the lock member 5 to the unlocked position is permitted.

次に、上記ステアリングロック装置１の動作を説明する。図１、図７及び図８に示すロック部材５の施錠時には、ロック部材５の先端がステアリングシャフト２の係合突部２０に対して係合することにより、ステアリングシャフト２の回転が阻止されるので、自動車は操縦不能な状態となる。このとき、図２に示すように、ステアリングシャフト２が少し回転して係合突部２０がロック部材５の先端の傾斜面５３を押圧すると、図６に示すように、ロック部材５の先端に力が加わる。ステアリングシャフト２の回転力Ｆ２は、係合突部２０を介して傾斜面５３に外力Ｆが付与されることとなり、ロック部材５のスライド方向の分力Ｆ１が働いてロック部材５が解錠方向へ付勢される。同時に、保持部材６の係合板部６１がロック部材５の係合溝５２に係合しているので、ロック部材５が施錠位置で保持される。   Next, the operation of the steering lock device 1 will be described. When the lock member 5 shown in FIGS. 1, 7 and 8 is locked, the rotation of the steering shaft 2 is prevented by engaging the front end of the lock member 5 with the engagement protrusion 20 of the steering shaft 2. As a result, the car becomes uncontrollable. At this time, as shown in FIG. 2, when the steering shaft 2 is slightly rotated and the engaging protrusion 20 presses the inclined surface 53 at the tip of the lock member 5, the tip of the lock member 5 is brought into contact as shown in FIG. 6. Power is added. The rotational force F2 of the steering shaft 2 is given an external force F to the inclined surface 53 via the engaging protrusion 20, and the component force F1 in the sliding direction of the lock member 5 acts so that the lock member 5 is unlocked. To be energized. At the same time, since the engagement plate portion 61 of the holding member 6 is engaged with the engagement groove 52 of the lock member 5, the lock member 5 is held in the locked position.

次いで、解錠時には、図３に示すように、まず保持カム４１の駆動により保持部材６によるロック部材５の保持状態を解除すると、上記外力Ｆのうち、ロック部材５のスライド方向の分力Ｆ１によりロック部材５が解錠方向へ付勢される。その後、図４に示すように、ロックカム４０の駆動によりロック部材５がさらに解錠方向へ付勢されるので、ロック部材５がロックバネ５０に抗して解錠方向へ移動する結果、ロック部材５の先端がステアリングシャフト２の係合凹部２１から離脱してステアリングシャフト２の回転が自由となり、自動車は操縦可能な状態となる。   Next, at the time of unlocking, as shown in FIG. 3, when the holding state of the lock member 5 by the holding member 6 is first released by driving the holding cam 41, the component force F <b> 1 in the sliding direction of the lock member 5 out of the external force F. Thus, the lock member 5 is biased in the unlocking direction. After that, as shown in FIG. 4, the lock member 5 is further biased in the unlocking direction by driving the lock cam 40, and as a result, the lock member 5 moves in the unlocking direction against the lock spring 50. The tip of the steering wheel 2 is disengaged from the engaging recess 21 of the steering shaft 2 so that the steering shaft 2 can freely rotate, and the vehicle can be steered.

また、ロック部材５が解錠位置から施錠方向に移動する際に、図５に示すように、ロック部材５の先端がステアリングシャフト２の係合突部２０上に乗り上げた場合、保持部材６の係合板部６１がロック部材５の係合溝５２に係合していないので、ロック部材５が軸方向に移動可能である。この状態でステアリングシャフト２が少し回転すると、ロック部材５の先端がステアリングシャフト２の係合突部２０に係合するとともに、保持部材６の係合板部６１がロック部材５の係合溝５２に係合するので、ロック部材５が施錠位置で保持される。   Further, when the lock member 5 moves from the unlocked position in the locking direction, as shown in FIG. 5, when the tip of the lock member 5 rides on the engaging protrusion 20 of the steering shaft 2, Since the engagement plate portion 61 is not engaged with the engagement groove 52 of the lock member 5, the lock member 5 is movable in the axial direction. When the steering shaft 2 is slightly rotated in this state, the distal end of the lock member 5 is engaged with the engagement protrusion 20 of the steering shaft 2, and the engagement plate portion 61 of the holding member 6 is engaged with the engagement groove 52 of the lock member 5. Since it engages, the lock member 5 is hold | maintained in a locking position.

以上、本発明では、施錠状態から解錠状態へ移行する際に、ステアリングシャフト２の係合突部２０を介して付与される回転力Ｆ２をロック部材５の先端の傾斜面５３で受けることにより、ロック部材５のスライド方向の分力Ｆ１が働いてロック部材５が解錠方向へ付勢されるので、比較的小さい解錠力でロック部材５を施錠位置から解錠状態へ移動させることができ、ロック部材５の駆動機構のコンパクト化を図ってコストを削減することができる。また、施錠時には保持部材６の係合板部６１がロック部材５の係合溝５２に係合しているので、ロック部材５を施錠位置で確実に保持することができる。   As described above, in the present invention, when the locked state is shifted to the unlocked state, the rotational force F2 applied through the engaging protrusion 20 of the steering shaft 2 is received by the inclined surface 53 at the distal end of the lock member 5. Since the component force F1 in the sliding direction of the lock member 5 works and the lock member 5 is urged in the unlocking direction, the lock member 5 can be moved from the locked position to the unlocked state with a relatively small unlocking force. In addition, the drive mechanism of the lock member 5 can be made compact and the cost can be reduced. Further, since the engaging plate portion 61 of the holding member 6 is engaged with the engaging groove 52 of the lock member 5 at the time of locking, the lock member 5 can be reliably held at the locking position.

また、ロック部材５に作用する解錠方向への付勢力、つまり保持部材６に作用する力Ｆ１は、ステアリングシャフト２の回動方向に対する傾斜面５３の角度に作用する分力なので、ステアリングシャフト２の回動方向に作用する回転力Ｆ２よりも小さくてすむため、保持部材６の強度を抑えつつ、施錠時には保持部材６によりロック部材５を確実に保持することができる。   Further, the urging force acting on the lock member 5 in the unlocking direction, that is, the force F1 acting on the holding member 6 is a component force acting on the angle of the inclined surface 53 with respect to the turning direction of the steering shaft 2, and thus the steering shaft 2. Therefore, the lock member 5 can be reliably held by the holding member 6 when locking, while suppressing the strength of the holding member 6.

この実施形態では、ロックスライド手段７をロックバネ５０と、ロックカム４０とで構成するとともに、保持移動手段８を保持バネ６２と、保持カム４１とで構成することで、比較的単純な構成でロックスライド手段７と保持移動手段８とを構成することができる。   In this embodiment, the lock slide means 7 is constituted by the lock spring 50 and the lock cam 40, and the holding and moving means 8 is constituted by the holding spring 62 and the holding cam 41, so that the lock slide means 7 has a relatively simple structure. The means 7 and the holding and moving means 8 can be configured.

この実施形態では、ロック部材５及び保持部材６をそれぞれ駆動するロックカム４０と保持カム４１を同軸上に一体に設け、カム体４を構成することで、ロック部材５を駆動する駆動機構のコンパクト化をさらに図ることができる。   In this embodiment, the lock cam 40 and the holding cam 41 that respectively drive the lock member 5 and the holding member 6 are integrally provided on the same axis, and the cam body 4 is configured, whereby the drive mechanism that drives the lock member 5 is made compact. Can be further planned.

１ ステアリングロック装置
２ ステアリングシャフト
５ ロック部材
６ 保持部材
７ ロックスライド手段
８ 保持移動手段
２１ 係合凹部
４０ ロックカム
４１ 保持カム
５０ ロックバネ
５３ 傾斜面
６２ 保持バネ DESCRIPTION OF SYMBOLS 1 Steering lock apparatus 2 Steering shaft 5 Lock member 6 Holding member 7 Lock slide means 8 Holding movement means 21 Engaging recessed part 40 Lock cam 41 Holding cam 50 Lock spring 53 Inclined surface 62 Holding spring

Claims (2)

施錠位置と解錠位置との間を移動自在に配置されたロック部材と、該ロック部材を該施錠位置と該解錠位置との間で移動させるロックスライド手段とを備え、該施錠位置では、該ロック部材の先端がステアリングシャフトの外周に径方向に向かって突設された係合突部と係合して該ステアリングシャフトの回動を規制し、該解錠位置では、該ロック部材の先端が該係合突部から離間して該ステアリングシャフトの回動を許可するステアリングロック装置であって、
前記ロック部材の先端に該ロック部材の移動方向に対して斜めに形成される傾斜面と、
前記施錠位置に位置する該ロック部材と係合し、該ロック部材の前記解錠位置への移動を規制する保持位置と、該ロック部材との係合が解除され、該ロック部材の解錠位置への変位を許可する保持解除位置との間で移動自在に配置された保持部材と、
該保持部材を該保持位置と該保持解除位置との間で変位させる保持移動手段とを備え、
前記ロックスライド手段が、
弾性材からなるロック付勢手段と、
略円盤形状を有し、外周縁に位置するロックカム部にカム面が形成されたロックカムとから構成され、
前記保持移動手段が、
弾性材からなる保持付勢手段と、
略円盤形状を有し、外周縁に位置する保持カム部にカム面が形成された保持カムとから構成され、
前記ステアリングシャフトが回動した際に、前記係合突部によって該施錠位置に位置する該ロック部材の該傾斜面が押圧され、該ロック部材が解錠方向へ付勢され、
該ロック付勢手段によって前記ロック部材がステアリングシャフトに向かって該ロックカム部上に付勢保持されつつ、該ロックカムが回動することによって、該ロック部材が施錠位置と解錠位置との間を移動し、
該保持付勢手段によって前記保持部材がロック部材に向かって該保持カム部上に付勢保持されつつ、該保持カムが回動することによって、該保持部材が保持位置と保持解除位置との間を移動することを特徴とするステアリングロック装置。 A locking member that is movably disposed between a locking position and an unlocking position, and a lock slide means that moves the locking member between the locking position and the unlocking position, and in the locking position, The front end of the lock member engages with an engagement protrusion projecting radially on the outer periphery of the steering shaft to restrict the rotation of the steering shaft, and in the unlocked position, the front end of the lock member Is a steering lock device that permits rotation of the steering shaft apart from the engaging protrusion,
An inclined surface formed obliquely with respect to the moving direction of the locking member at the tip of the locking member;
A holding position that engages with the lock member located at the lock position and restricts the movement of the lock member to the unlock position, and an engagement with the lock member is released, and an unlock position of the lock member A holding member arranged movably between a holding release position that permits displacement to
Holding movement means for displacing the holding member between the holding position and the holding release position;
The lock slide means
Lock urging means made of an elastic material;
A lock cam having a substantially disk shape and having a cam surface formed on a lock cam portion located on an outer peripheral edge;
The holding and moving means is
Holding and biasing means made of an elastic material;
A holding cam having a substantially disc shape and having a cam surface formed on a holding cam portion located on the outer peripheral edge;
When the steering shaft rotates, the inclined surface of the lock member positioned at the locking position is pressed by the engagement protrusion, and the lock member is urged in the unlocking direction,
While the lock member is biased and held on the lock cam portion toward the steering shaft by the lock urging means, the lock member moves between the locked position and the unlocked position by rotating the lock cam. And
While the holding member is urged and held on the holding cam portion toward the lock member by the holding urging means, the holding cam is rotated so that the holding member is moved between the holding position and the holding release position. Steering lock device characterized in that it moves . 請求項１記載のステアリングロック装置であって、
前記ロック部材を駆動するロックカムと、前記保持部材を駆動する保持カムとを一体的に設けたことを特徴とするステアリングロック装置。 The steering lock device according to claim 1 ,
A steering lock device comprising a lock cam for driving the lock member and a holding cam for driving the holding member.
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