JP2008106571A - Locking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the looseness of an engaging member in a locking device by a simple constitution. <P>SOLUTION: A coil part 101 for pressing a hook member 9 in the axial line Y direction of a support axis 8 is externally inserted into the support axis 8, and the end of the coil part 101 abuts on the vicinity of the axial hole 91 of the hook member 9 in which the support axis 8 loosely fits by a pressing force in the axial line Y direction. A tilting surface 111 tilted in the axial line Y direction is provided to apply a force in a direction orthogonal to the axial line Y direction to the hook member 9. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a locking device that includes an engaging member that is rotatably supported by a support shaft that is fixed to a base member and that can be engaged with and disengaged from a striker.

For example, in a seat locking device mounted on a seat back of a vehicle, a support shaft is fixed to a base member fixed to the seat back, and the engaging member is pivotally supported by the support shaft. The engaging member has an engaging groove at its swinging end, and a striker fixed to the vehicle body engages with the engaging groove to hold the seat back in an upright position (for example, Patent Documents). 1).
Japanese Patent No. 3387877

  However, the size of the support shaft in the locking device as described above and the shaft hole of the engagement member into which the support shaft is inserted is set so that the engagement member can smoothly rotate around the support shaft. Is set such that a slight clearance is generated in the radial direction between the shaft hole and the inner periphery of the shaft hole of the engaging member. For this reason, in particular, when the vehicle is traveling on the uneven road surface with the striker engaged with the engagement groove of the engagement member and holding the seat in the upright position, the shaft hole and the support shaft Due to the effect of the clearance between them, the engaging member rattles, and there is a problem that the quality is deteriorated.

  The present invention has been made to solve the conventional problems as described above, and provides a locking device that can suppress rattling of the engaging member with a simple configuration. It is aimed.

According to the present invention, the above problem is solved as follows.
(1) The support shaft is fixed to the base member having the striker entry groove, and the engagement shaft has an engagement groove with which the striker can be engaged when the striker enters the support shaft with respect to the striker entry groove. In the lock device formed by pivotally supporting a joint member, the engaging shaft is externally fitted to the support shaft with elastic means for pressing the engaging member in the axial direction of the support shaft, and the support shaft is loosely fitted. The end of the elastic means abuts with a pressing force in the axial direction in the vicinity of the shaft hole of the member so that a force in a direction perpendicular to the axial direction is applied to the engaging member. An inclined surface inclined with respect to the axial direction is provided.

(2) In the above item (1), the elastic means is a coil portion of a torsion coil spring, a biasing arm portion extending from one end of the coil portion is locked to the engaging member, and the coil By engaging a locking arm portion extending from the other end of the portion with the base member, a biasing force in an engaging direction for engaging the striker is applied to the engaging member.

(3) In the above item (1) or (2), the inclined surface is formed by a resin mold that covers the surface of the engaging member.

(4) In any one of the above items (1) to (3), the support shaft is disposed on a striker entry extension line extending an entry direction of the striker with respect to the striker entry groove, and the inclined surface is It is provided on the striker approach extension line and so as to face the striker approach direction.

According to the present invention, the following effects can be obtained.
According to the first aspect of the invention, the inner peripheral surface of the shaft hole of the engaging member is pressed against the outer peripheral surface of the support shaft fixed to the base member by a force in a direction perpendicular to the axial direction acting on the engaging member. Therefore, rattling of the engagement member with respect to the support shaft can be reliably suppressed.

  According to the second aspect of the present invention, since the elastic means is the coil portion of the torsion coil spring, the rattling of the engaging member is suppressed with a single spring, and the biasing force in the engaging direction is applied to the engaging member. Can be granted.

  According to the invention which concerns on Claim 3, an inclined surface can be easily formed in an engaging member by forming the inclined surface with the resin mold which coat | covers the surface of an engaging member.

  According to the invention concerning Claim 4, when the striker is engaged with the engaging groove of the engaging member, the rattling of the engaging member can be reliably suppressed.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view showing a rear seat of an automobile to which an embodiment of the present invention is applied, FIG. 2 is a side view of the lock device in an engaged state, and FIG. 3 is a side view of the lock device in a released state. 4 is an enlarged sectional view taken along the line IV-IV in FIG. 2, FIG. 5 is an enlarged sectional view of the main part, and FIG. 6 is a sectional view taken along the line VI-VI in FIG. In the following description, left and right in FIGS. 2 and 3 are front and rear, upper and lower are upper and lower, and upper and lower in FIGS. 4 and 5 are left and right.

  As shown in FIG. 1, a rear seat 1 of an automobile includes a seat cushion 2 that is attached to a floor of a vehicle body (not shown), and a seat back 3 that can move from a standing position indicated by a solid line to a forward leaning posture around a lower end portion. With.

  A lock device 4 to which the present invention is applied is mounted on the upper portion of the seat back 3. The locking device 4 includes, as main components, left and right first and second base members having striker entry grooves 61 and 71 that are fixed to the seat back 3 and into which the striker 5 fixed to the vehicle body can relatively enter from behind. 6, 7, a support shaft 8 that is fixed between the first and second base members 6 and 7 and that faces in the left-right direction, and an engagement member that is pivotally supported by the support shaft 8 between the first and second base members 6 and 7. And the hook member 9 in an engagement direction (a direction in which an engagement groove 92 described below engages with the striker 5) and a direction in which the hook member 9 is prevented from rattling as described later. And a torsion coil spring 10 for applying a force. The first and second base members 6 and 7 are coupled to each other at a predetermined interval in the left-right direction.

  As shown in FIG. 2, when the hook member 9 is held in the engagement position and the striker 5 that has entered the striker entry grooves 61 and 71 engages with the engagement groove 92 of the hook member 9, the seat back 3 is As shown in FIG. 3, the hook is held in a standing position and is connected via a connecting member (not shown) based on the operation of the release operation portion 4 </ b> A (see FIG. 1) provided on the upper portion of the seat back 3. When the member 9 moves to the release position, the engagement groove 92 is detached from the striker 5 and enables the seat back 3 to move to the forward inclined posture.

  As shown mainly in FIG. 4, the support shaft 8 has an enlarged diameter portion 81 at the center in the axial direction, a first reduced diameter portion 82 at one end of the enlarged diameter portion 81, and a second at the other end of the enlarged diameter portion 81. A stepped shape having a reduced diameter portion 83 and a third reduced diameter portion 84 having a diameter smaller than that of the second reduced diameter portion 83 at the end of the reduced diameter portion 83 and the second reduced diameter portion 83, and the striker entry groove 61 of the striker 5, It is supported on a striker approach extension line (X) extending the approach direction to 71.

  The first reduced diameter portion 82 is closely fitted and fixed so that the first shaft hole 62 drilled in the first base member 6 does not rattle. The second reduced diameter portion 83 is loosely fitted in a shaft hole 91 formed in the front end portion of the hook member 9 so that the hook member 9 can smoothly rotate around the support shaft 8. The third reduced diameter portion 84 is closely fitted and fixed so that the shaft hole 72 formed in the second base member 7 is not rattled.

  The hook member 9 has an engagement groove 92 in which the striker 5 can be engaged and disengaged at the rear portion, and the second reduced diameter portion 83 of the support shaft 8 is loosely fitted into the shaft hole 91 formed in the front portion. The second base member 7 is pivotally supported so as to be swingable in the vertical direction while being sandwiched between the stepped portion of the enlarged diameter portion 81 of the support shaft 8.

  The torsion coil spring 10 includes a cylindrical coil portion 101 that forms an elastic means fitted on the enlarged diameter portion 81 of the support shaft 8, and an urging force that is extended from one end of the coil portion 101 and locked to the hook member 9. The arm portion 102 has a locking arm portion 103 that extends from the other end of the coil portion 101 and is locked to the first base member 6. The urging arm portion 102 is engaged with the hook member 9 to apply an urging force in the engaging direction to the hook member 9.

  The coil portion 101 of the torsion coil spring 10 is compressed in the axis Y direction of the support shaft 8 between the inner surface of the first base member 6 and the side surface of the hook member 9, that is, the pressing force is applied in the axis Y direction. In order to act, it is fitted on the enlarged diameter portion 81 of the support shaft 8. Thereby, the hook member 9 is pressed toward the second base member 7 side by the pressing force of the coil portion 101.

  The surface of the hook member 9 is covered with the resin mold 12, and the coil portion 101 of the torsion coil spring 10 is disposed in the vicinity of the shaft hole 91 in the hook member 9 in an arc shape around the shaft hole 91. A contact portion 11 that protrudes toward the side is formed.

  The contact portion 11 is formed by the resin mold 12 and has an inclined surface inclined at an acute angle with respect to the axis Y of the support shaft 8 on the inner peripheral surface (the surface facing the outer peripheral surface of the support shaft 8). 111 is provided.

  The inclined surface 111 of the abutting portion 11 is provided on the striker approach extension line X so as to be opposed to the approach direction of the striker 5 (rightward in FIGS. 2 and 3), and the coil portion of the torsion coil spring 10. The outer periphery of the coil portion 101 is in contact with the outer periphery of the expanded diameter portion 81 while the inner periphery of one end of the coil portion 101 is in contact with the outer periphery of the expanded diameter portion 81 by being externally fitted to the expanded diameter portion 81 of the support shaft 8 in a compressed state. It is formed to be pressed.

  As a result, the coil portion 101 presses the inclined surface 111 with a pressing force in the axis Y direction, so that a component force F in a direction orthogonal to the axis Y direction acts on the inclined surface 111. By this component force F, the hook member 9 is biased rearward by a clearance L generated between the outer periphery of the second reduced diameter portion 83 in the support shaft 8 and the inner periphery of the shaft hole 91 in the hook member 9. . As a result, the inner peripheral surface of the shaft hole 91 in the hook member 9 can be pressed against the outer peripheral surface of the support shaft 8 fixed to the first and second base members 6, 7. The rattling against the can be reliably suppressed.

  The resin mold 12 is not applied to the inner peripheral surface of the shaft hole 91 in the hook member 9. The reason for this is to prevent the resin portion from being crushed by the compression overload acting between the outer peripheral surface of the support shaft 8 and the inner peripheral surface of the shaft hole 91, thereby causing rattling.

  Although one embodiment of the present invention has been described above, the following various modifications and changes can be made to the present embodiment without departing from the scope of the claims of the present invention. .

(I) The lock device 4 is other than the seat lock device that holds the seat back in the upright position.

(Ii) Instead of the coil unit 101 of the torsion coil spring 10, the elastic means may be a compression coil spring, a cylindrical rubber, a washer, or a combination thereof as appropriate.

It is a perspective view which shows the rear seat of the motor vehicle which applied one Embodiment of this invention. It is a side view of the locking device in an engaged state. It is a side view of the lock device in the release state. It is the IV-IV line expanded sectional view in FIG. It is an expanded sectional view of the principal part. It is the VI-VI sectional view taken on the line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rear seat 2 Seat cushion 3 Seat back 4 Locking device 4A Release operation part 5 Striker 6 1st base member 7 2nd base member 8 Support shaft 9 Hook member (engaging member)
DESCRIPTION OF SYMBOLS 10 Torsion coil spring 11 Contact part 12 Resin mold 61 Striker entrance groove 62 1st shaft hole 71 Striker entrance groove 72 Shaft hole 81 Diameter expansion part 82 1st diameter reduction part 83 2nd diameter reduction part 84 3rd diameter reduction part 91 Shaft hole 92 engaging groove 101 coil portion (elastic means)
102 Energizing arm portion 103 Locking arm portion 111 Inclined surface X Strike approach extension line Y Axis line

Claims (4)

A support shaft is fixed to a base member having a striker entry groove, and an engagement member having an engagement groove with which the striker can engage when the striker enters the support shaft with respect to the striker entry groove. In the locking device that pivots,
An elastic means for pressing the engagement member in the axial direction of the support shaft is externally fitted to the support shaft, and the elastic means is disposed in the vicinity of the shaft hole of the engagement member in which the support shaft is loosely fitted. An inclined surface that is inclined with respect to the axial direction is provided so that the end portion abuts with the pressing force in the axial direction to apply a force in a direction orthogonal to the axial direction to the engaging member. A locking device characterized by that.   The elastic means is a coil portion of a torsion coil spring, a biasing arm portion extending from one end of the coil portion is locked to the engagement member, and a lock extending from the other end of the coil portion 2. The lock according to claim 1, wherein a biasing force in an engaging direction for engaging with the striker is applied to the engaging member by locking the arm portion to the base member. apparatus.   The locking device according to claim 1, wherein the inclined surface is formed by a resin mold that covers a surface of the engaging member.   The support shaft is arranged on a striker approach extension line extending the entry direction of the striker with respect to the striker entry groove, and the inclined surface is opposed to the striker entry extension line and to the striker entry direction. The locking device according to claim 1, wherein the locking device is provided.

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