JP2008213695A - Locking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance operation feeling by reducing operation force of initial operation on an operation part. <P>SOLUTION: An open mechanism 9 is provided with an initial action transmission means 12 for transmitting the operation force of the initial operation on the operation part to a hook member 8 at an operation stroke shorter than an operation stroke of the operation part to initially turning the hook member 8 from an engagement position to an initial action position D before a release position; and a latter stage action transmission means 13 for transmitting operation force of latter stage operation on and after the initial action on the operation part with an operation stroke longer than an operation stroke of the initial action transmission means 12 to turning the hook member 8 from the initial action position D to the release position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lock device for releasing a locked state in which a seat back that is rotatably supported by a vehicle body is held in an upright position, for example.

2. Description of the Related Art Conventionally, in a vehicle seat locking device, a hook member that is attached to a seat back that is rotatably supported at a standing position and a lying position on a vehicle body side and that can be engaged with and disengaged from a striker fixed to the vehicle body side And an open lever for operating the hook member to a release position where the hook member is released from the striker. When the hook member engages with the striker, the seat back is restrained in a locked state at the standing position. Then, the operation part provided on the seat back is operated to release, and the hook member is operated to the release position via the open lever, thereby releasing the seat back locked state and rotating the seat back to the lying down position. Can be moved. Also, when the seat back is constrained to the standing position, an engagement groove that engages with the striker provided on the hook member so that the seat back does not rattle due to the backlash between the striker and the hook member. The opening width is gradually reduced toward the back (see, for example, Patent Document 1).
Japanese Patent No. 3796395

  However, in the locking device as described above, rattling between the hook member and the striker can be suppressed, but the initial operation of the operation unit, that is, when the hook member that is strongly engaged with the striker is detached from the striker. The operation becomes much heavier than the latter operation after the hook member is detached from the striker, and the operation feeling is deteriorated.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a lock device that improves the operation feeling by reducing the operation force of the initial operation in the operation unit.

According to the present invention, the above problem is solved as follows.
(1) The rotating body can be constrained to a locked state by being provided on either the support body or the rotating body rotatably supported by the support body and engaging with a striker provided on the other. In a lock device comprising a hook member and an open mechanism for rotating the hook member from an engagement position engaged with the striker to a release position where the hook member is released from the striker by operation of an operation portion provided at an appropriate position. The open mechanism transmits the operation force of the initial operation in the operation unit to the hook member with an operation stroke shorter than the operation stroke of the operation unit, and the hook member is moved from the engagement position to the release position. An initial motion transmission means for initial rotation to the initial initial motion position, and an operation force of a later operation after the initial operation in the operation section is transmitted to the initial motion. Transmitted with a longer operating stroke than the operating stroke of the stage, and a late motion-transmitting means for rotating said hook member to said release position from said initial operating position.

(2) In the above item (1), the latter-stage motion transmission means is rotatably supported by the base member, and an operation input portion to which an operation force from the operation portion is input to one end portion, and a predetermined amount of rotation After that, it includes a main drive open lever integrally formed with a late operation action portion capable of transmitting the input operation force to the hook member, and the initial operation transmission means is rotatable coaxially with the main drive open lever. A supported open lever that is supported and interlocked with the main drive open lever while the main drive open lever rotates by the predetermined amount, and can be rotated by a lever lever shaft at a position other than the rotation shaft of the main drive open lever. A lever lever that is supported and has an initial action acting portion that is directly or indirectly connected to the driven open lever and that can transmit the operation force of the initial operation to the hook member. Including the door.

(3) In the above item (2), the length of the moment arm from the lever lever shaft of the lever lever to the initial action acting portion is expressed as the moment from the rotation axis of the main drive open lever to the latter action action portion. Shorter than the arm length.

(4) In the above item (2) or (3), the initial operation action portion of the lever lever is provided between a connecting portion that is directly or indirectly connected to the driven open lever and the lever lever shaft.

(5) In any one of the above items (1) to (3), the driven open lever has a portion in contact with the main drive open lever after the hook member is rotated from the engagement position to the initial operation position. Move away from the main open lever.

(6) In the above item (5), the lever lever shaft is movably supported along a guide portion provided on the base member as the hook member rotates, and the lever lever shaft is moved. The movement of the lever lever accompanying this is transmitted to the driven open, and the driven open lever is moved ahead of the main drive open lever, thereby separating the portion that contacts the main drive open lever from the main drive open lever.

According to the present invention, the following effects can be obtained.
According to the first aspect of the present invention, in the initial operation of the operation unit, the hook member is rotated from the engagement position to the initial operation position by the initial operation transmission means capable of transmitting a short operation stroke, that is, a large operation force, Further, in the later operation of the operation unit, the hook member can be rotated from the initial operation position to the release position by the late operation transmission means capable of obtaining a large operation stroke, and the operation force of the initial operation in the operation unit is reduced. In addition, the difference between the operation force of the initial operation and the operation force of the later operation is reduced, and the operation feeling when the hook member is released is improved.

  According to the second aspect of the present invention, the hook member can be reliably rotated from the engagement position to the initial operation position by the initial operation of the operation portion, and the operation feeling when the hook member is released is further improved. Can be made.

  According to the third aspect of the invention, the operating force transmitted from the lever lever to the hook member can be easily and reliably increased, and the hook member can be reliably rotated from the engagement position to the initial operation position.

  According to the invention of claim 4, the operating force transmitted from the lever lever to the hook member can be increased more reliably.

  According to the fifth aspect of the invention, the operations of the driven open lever and the main drive open lever do not interfere with each other, and a smooth operation is possible.

  According to the sixth aspect of the present invention, the driven open lever moves ahead of the main drive open lever as the hook member rotates, so that the operations of the driven open lever and the main drive open lever do not interfere with each other. Operation can be obtained.

  Hereinafter, an embodiment according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a rear seat to which the locking device of the present invention is applied, FIG. 2 is a side view of the locking device, FIG. 3 is a perspective view of the main part, and FIGS. It is operation | movement explanatory drawing for doing. In the following description, the left side in each figure is “front”, and the right side is “rear”.

  As shown in FIG. 1, the rear seat 1 can be rotated in the front-rear direction by a seat cushion 2 that forms a support mounted on the vehicle floor and a hinge shaft (not shown) that faces the rear end of the seat cushion 2 in the left-right direction. And a seat back 3 forming a rotating body supported by the vehicle.

  The seat back 3 is connected to the metal striker 5 fixed to the vehicle body panel side by the locking device 4 attached to the lower side of the shoulder portion on the side close to the vehicle body panel (outside of the vehicle). It can be held at a first standing position indicated by a solid line and a second standing position indicated by a two-dot chain line inclined backward from the first standing position, and by operating an operation knob 6 provided on a shoulder portion of the seat back 3 , It can be rotated to the fall position indicated by the two-dot chain line that falls forward.

  The striker 5 is fixed to the side of the vehicle body panel that faces the side portion of the seat back 3, and has a first engagement shaft 51 on the front side and a second engagement shaft 52 on the rear side facing the indoor side.

  As shown in FIG. 2, the locking device 4 includes a base member 7 that is fixed in the seat back 3, and the first of the striker 5 is provided at a substantially central portion of the base member 7 when the seat back 3 is erected. A striker entry groove 71 in the front-rear direction in which the two engagement shafts 51 and 52 can enter from behind is provided.

  The base member 7 includes a hook member 8 for holding the seat back 3 in the first or second standing position by engaging with the first or second engaging shafts 51 and 52 of the striker 5, and an operation knob 6. And an open mechanism 9 for releasing the hook member 8 in conjunction with the operation.

  The hook member 8 is pivotally mounted in the vicinity of the back of the striker entry groove 71 in the base member 7 so as to be swingable in the vertical direction by a hook shaft 10 whose front end portion is directed in the left-right direction, and is hooked around the hook shaft 10 The spring 11 is biased in the engaging direction (downward).

  A lower portion of the hook member 8 near the rear end portion is provided with a first engagement groove 81 that is open on the lower side of the striker 5 so that it can be engaged with and disengaged from the first and second engagement shafts 51 and 52. Is provided with a second engagement groove 82 into which the first engagement shaft 51 can be loosely fitted, and a force receiving portion 83 formed by a shaft protruding in the left-right direction is fixed to the substantially central side surface of the upper portion. ing.

  When the hook member 8 is not engaged with the striker 5 (when the seat back 3 is in the lying down position), the hook member 8 stops at the standby position A (see FIG. 4) in a substantially horizontal state, and the first engaging groove 81. When the first engagement shaft 51 or the second engagement shaft 52 of the striker 5 is engaged (when the seat back 3 is held in the first standing position or the second standing position), the standby position A is started. It is held at an engagement position B (see FIGS. 5 and 6) that is slightly rotated upward, and is rotated upward from the engagement position B around the hook shaft 10 based on the operation of the operation knob 6. The first engagement groove 81 moves to the release position C (see FIG. 9) where it completely separates from the first engagement shaft 51 (or 52).

  When the seat back 3 is held in the first standing position, the first engagement shaft 51 of the striker 5 is engaged with the first engagement groove 81 of the hook member 8 as shown in FIG. Similarly, when held in the second standing position, the first engagement shaft 51 is loosely fitted in the second engagement groove 82, and the second engagement shaft 52 is engaged with the first engagement groove 81. Match.

  The opening width in the front-rear direction of the first engagement groove 81 of the hook member 8 gradually decreases toward the back side (upper side), and when the hook member 8 is in the engagement position B, the first engagement groove 81 is a striker. It is set so that it can engage with the five engaging shafts 51 and 52 without rattling in the front-rear direction.

  The open mechanism 9 transmits the operation force of the initial operation of the operation knob 6 to the hook member 8, and rotates the hook member 8 from the engagement position B to the initial operation position D (see FIG. 7) before the release position C. An initial operation transmission means 12 for transmitting the operation force and an operation force for the latter operation after the initial operation of the operation knob 6 is transmitted to the hook member 8 to rotate the hook member 8 from the initial operation position D to the release position C. 13.

  The late movement transmitting means 13 is a main drive open lever 15 pivotally mounted by an open shaft 14 facing the left and right directions above the striker entry groove 71 in the base member 7, and is wound around the open shaft 14 and waits for the main drive open lever 15. And a spring 16 biased toward the position (FIG. 5).

  The main drive open lever 15 is substantially L-shaped in a side view and has a first arm portion 151 extending forward and a second arm portion 152 extending downward. The arm portion 152 is stopped at a standby position facing downward.

  An operation force input unit 153 for inputting an operation force of the operation knob 6 through the vertical cable 30 is provided at the distal end portion of the first arm unit 151. Similarly, the upper edge is bent sideways. A pressing portion 154 is provided.

  The second arm portion 152 is operated by contacting the force receiving portion 83 of the hook member 8 by rotating the main open lever 15 by a predetermined amount (initial movement amount) in the release direction (clockwise) from the standby position. A late action action portion 155 capable of transmitting the operation force of the late operation in the portion 6 to the hook member 8 is formed.

  The initial motion transmitting means 12 is rotated by a driven open lever 17 that is interlocked with the main drive open lever 15 only during the initial operation in the operation unit 6 and a connecting shaft 18 that faces the front end (tip) of the driven open lever 17 in the left-right direction. The connecting lever 19 is connected to the lower end of the connecting lever 19 and the lever 21 is rotatably connected to the lower end of the connecting lever 19 by a connecting shaft 20 facing in the left-right direction.

  The driven open lever 17 is rotatably supported on the same axis 14 as the main drive open lever 15 so as to overlap with the first arm portion 151 of the main drive open lever 15 in the left-right direction. When the release operation is performed from the position, the contact portion 171 provided at the substantially central portion in the front-rear direction comes into contact with the pushing portion 154 of the main drive open lever 15 and moves from the standby position (FIG. 5) to the release direction (clockwise). Rotate. When the driven open lever 17 is rotated by a predetermined amount from the standby position, the contact portion 171 is separated from the pushing portion 154 as will be described later.

  As described above, the lever lever 21 is connected to the lower end portion of the connecting lever 19 so that the connecting portion of the front end portion is pivotable, and the moving shaft 22 that is fixed to the rear end portion and faces in the left-right direction has the base member 7. The connecting hole 212 that is pivotally and slidably engaged with the guide portion 72 provided on the side surface of the connecting portion 211, and that serves as an initial operation acting portion provided substantially at the center between the connecting portion 211 and the moving shaft 22, The hook member 8 is connected to the force receiving portion 83 so as to be rotatable in the vertical direction.

  When the driven open lever 17 rotates clockwise in conjunction with the rotation of the main drive open lever 15, the lever lever 21 is guided through the connecting lever 19 while rotating clockwise around the moving shaft 22. It moves forward in the part 72.

  The arm length L1 (see FIG. 5) of the moment from the rotation center of the lever lever 21, that is, the moving shaft 22 to the connection hole 212 that transmits the operating force to the hook member 8, is the rotation center of the main drive open lever 15, that is, the open shaft 14. The arm length L2 (see FIG. 5) from the moment to the late action acting portion 155 that transmits the operating force to the hook member 8 and the arm length L3 (see FIG. 5) from the open shaft 14 to the operation input portion 153. It is set to be shorter than the reference).

  As a result, the connecting hole 212 of the lever lever 21 has an operation stroke shorter than the operation stroke of the operation input unit 153 of the main drive open lever 15 corresponding to the operation stroke of the operation unit 6, that is, the late operation operation unit 155 of the main drive open lever 15. Transmits a rotational moment larger than the operating force transmitted to the hook member 8 to the force receiving portion 83 of the hook member 8. Further, since the connecting hole 212 is provided between the moving shaft 22 serving as the rotation center and the connecting portion 211 to which the operating force is input, the hook member 8 is moved from the engaging position B to the initial operating position D by the action of the lever. Can be operated reliably.

  Further, the latter-stage operation action portion 155 of the main drive open lever 15 transmits a rotational moment smaller than the operation stroke of the lever lever 21 to the hook member 8, so that the hook member 8 is moved to the initial position in the same position with a larger operation stroke than the lever lever 21. It can be rotated from D to the release position C.

  As shown mainly in FIG. 2, the guide portion 72 of the base member 7 forms a straight line that rises forward and is inclined, and a line E that connects the center point of the hook shaft 10 and the center point of the open shaft 14 and the hook member. 8 is provided at a position that intersects the movement trajectory of the force receiving portion 83 associated with the 8 rotation. Thereby, the operating force from the lever lever 21 can be reliably transmitted to the hook member 8.

  When the hook member 8 is in the engagement position B, the moving shaft 22 of the lever lever 21 is in a position close to the rear end of the guide portion 72, and the connection hole 212 that forms the initial operation action portion of the lever lever 21 is In the side view, the guide portion 72 is located at the approximate center.

  Next, the operation of this embodiment will be described. When the seat back 3 is rotated to the upright position, the first engagement shaft 51 of the striker 5 enters the striker entry groove 71 of the base member 7 and the first engagement of the hook member 8 as shown in FIG. Engaging with the groove 81, the seat back 3 is locked and restrained in the standing position.

  In the locked state, the hook member 8 is urged to the engagement position B by the hook spring 11, and the first engagement groove 81 is firmly engaged with the first engagement shaft 51 of the striker 5 without rattling. The back 3 does not rattle. Further, a play F (see FIG. 5) is generated between the pushing portion 154 of the main drive open lever 15 and the contact portion 171 of the driven open lever 17, and the late operation action portion 155 of the main drive open lever 15 and the hook member. A play G (not shown in the reference numerals) is also generated between the eight force receiving portions 83.

  When the operation knob 6 is operated in the above-described state, the operation force of the operation knob 6 is input to the operation input unit 153 of the main drive open lever 15 via the cable 30. Thereby, when the main drive open lever 15 is rotated from the standby position shown in FIG. 5 by an amount corresponding to the play F in the release direction, the pushing portion 154 of the main drive open lever 15 is moved to the driven open lever 17 as shown in FIG. The driven open lever 17 starts rotating in the release direction from the standby position shown in FIG. At this time, there is still play between the latter-stage operation acting portion 155 and the force receiving portion 83 of the main drive open lever 15, and the operating force from the later-stage action acting portion 155 is not transmitted to the hook member 8.

  From the state shown in FIG. 6, when the driven open lever 17 and the driven open lever 17 are also rotated in the releasing direction, the operating force of the operating unit 6 is transmitted to the lever lever 21 via the connecting lever 19 accordingly.

  Then, as shown in FIG. 7, the lever lever 21 is rotated clockwise around the moving shaft 22 by the operating force transmitted from the connecting lever 19, and the force receiving portion 83 is moved upward by the action of the lever. Apply a large lifting force. Due to the operating force transmitted from the lever lever 21, the hook member 8 is in a period until it is rotated from the engagement position B to the initial operation position D, that is, the first engagement groove 81 is firmly fixed to the first engagement shaft 81. During the period of releasing the engaged state, the first engaging groove 81 is rotated to the slightly engaged state from the first engaging shaft 51 of the striker 5 by the large force transmitted from the lever lever 21. . Therefore, the hook member 8 in which the first engagement groove 81 is firmly engaged with the first engagement shaft 51 can be rotated in the release direction with a light force.

  When the hook member 8 rotates to the initial operation position D, as shown in FIG. 7, the latter operation action portion 155 of the main drive open lever 15 comes into contact with the force receiving portion 83, and this time, the latter operation action portion 155 is operated. The force is transmitted to the force receiving portion 83, and the hook member 8 is rotated from the initial operation position D to the release position C through the state shown in FIG. At this time, during the period in which the hook member 8 rotates from the initial operation position D to the release position C, the lever lever 21 moves while the moving shaft 22 moves forward in the guide portion 72 as the hook member 8 rotates. The front end is rotated so as to move upward. In conjunction with this, the driven open lever 17 rotates in the release direction ahead of the main drive lever 15 via the connecting lever 19. As a result, the pushing portion 154 of the main drive open lever 15 is separated from the contact portion 171 of the driven open lever 17, so that the push portion 154 and the contact portion 171 do not interfere with each other, so that reliable operation is achieved. Obtainable.

  As described above, in the initial operation of the operation knob 6 requiring a large operation force, the hook member 8 is moved from the engagement position B to the initial operation position D by the initial operation action portion of the lever lever 21 capable of generating a large force. In the later operation after the initial operation that can be operated with a light operating force compared to the initial operation, the hook member 8 is moved from the initial operation position D by the latter operation action portion 155 of the main drive open lever 15. Since it is rotated largely to the release position C, the difference between the initial operation force and the later operation force of the operation knob 6 is reduced, and the operation feeling when the hook member 8 is released is improved.

Although the 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 gist of the present invention.
(I) Instead of the seat back 3, the rotating body is a door or the like that is rotatably supported by a vehicle body, a pillar, or the like.
(Ii) The connecting portion 211 of the lever lever 21 is connected to the distal end portion of the driven open lever 17 so as to be directly rotatable. In this case, it is preferable to couple the two via a play such as a long hole so as to absorb the turning locus of the tip of the driven open lever 17 and the turning locus of the connecting portion 211 of the lever lever 21.

It is a perspective view of the rear seat for vehicles to which the present invention is applied. It is a side view of a locking device. It is a perspective view of the principal part of a locking device. It is a side view of the principal part when a locking device is in a standby state. It is a side view of the principal part when a locking device exists in an engagement state. It is a side view of the principal part when an operation knob is operated when a locking device is in an engagement state. It is a side view of the principal part when a locking device is in an initial operation state. It is a side view of the principal part when a locking device exists in a release state near. It is a side view of the principal part when a locking device is in a release state.

Explanation of symbols

1 Rear seat 2 Seat cushion (support)
3 Seat back (rotating body)
4 Locking device 5 Striker 6 Operation knob 7 Base member 8 Hook member 9 Open mechanism 10 Hook shaft 11 Hook spring 12 Initial motion transmission means 13 Late motion transmission means 14 Open shaft 15 Main drive open lever 16 Spring 17 Follow open lever 18 Connection shaft 19 Connecting lever 20 Connecting shaft 21 Insulator lever 22 Moving shaft (Insulator lever shaft)
30 cable 51 first engagement shaft 52 second engagement shaft 71 striker entry groove 72 guide portion 81 first engagement groove 82 second engagement groove 83 force receiving portion 151 first arm portion 152 second arm portion 153 operation input Portion 154 Pushing portion 155 Late motion acting portion 171 Contact portion 212 Connection hole (initial motion acting portion)
211 Connection A Standby position B Engagement position C Release position D Initial operation position E Lines F and G Play

Claims (6)

A hook member that is provided on either the support body or the rotation body that is rotatably supported by the support body, and that engages with a striker provided on the other side, thereby restraining the rotation body in a locked state; A locking device including an open mechanism that rotates the hook member from an engagement position engaged with the striker to a release position where the hook member is detached from the striker by an operation of an operation unit provided at an appropriate position;
The open mechanism transmits an operation force of an initial operation in the operation unit to the hook member with an operation stroke shorter than an operation stroke of the operation unit, and moves the hook member from the engagement position to the release position. An initial motion transmitting means for initial rotation to an initial motion position; and an operation force of a later operation after the initial operation in the operation portion is transmitted with an operating stroke longer than an operating stroke of the initial motion transmitting means, and the hook member And a late operation transmitting means for rotating the device from the initial operation position to the release position. The latter-stage motion transmission means is rotatably supported by a base member, and an operation input portion to which an operation force from the operation portion is input at one end portion, and the input operation force after being rotated by a predetermined amount, Including a main drive open lever integrally formed with a late action acting part that can be transmitted to the member,
The initial motion transmission means is supported rotatably on the same axis as the main drive open lever, and a driven open lever that contacts and interlocks with the main drive open lever during a period in which the main drive open lever rotates by the predetermined amount; The lever is pivotally supported by a lever lever shaft at a position other than the rotation shaft of the main drive open lever, and is connected directly or indirectly to the driven open lever so that the operation force of the initial operation can be transmitted to the hook member. The locking device according to claim 1, further comprising: an lever lever having an initial operation acting portion.   The length of the moment arm from the lever lever shaft of the lever lever to the initial action acting portion is shorter than the length of the moment arm from the rotation axis of the main drive open lever to the late action acting portion. The locking device according to claim 2.   The locking device according to claim 2 or 3, wherein the initial operation acting portion of the lever lever is provided between a connecting portion connected directly or indirectly to the driven open lever and the lever lever shaft. .   5. The driven open lever according to claim 2, wherein, after the hook member is rotated from the engagement position to the initial operation position, a portion in contact with the main drive open lever is separated from the main drive open lever. The locking device according to any one of the above.   The lever lever shaft is supported so as to be movable along a guide portion provided on the base member as the hook member is rotated, and the lever lever is moved following the movement of the lever lever shaft. 6. The lock according to claim 5, wherein the portion that contacts the main drive open lever is separated from the main drive open lever by transmitting to the open and moving the driven open lever in advance of the main drive open lever. apparatus.

Images