JP5252664B2 - Vehicle seat lock device - Google Patents

Description

  The present invention relates to a vehicle seat lock device capable of holding a seat back supported by a vehicle body so as to be able to rise and fall in a standing position.

  2. Description of the Related Art Conventionally, in a vehicle seat lock device, a hook lever that is attached to a seat back supported so as to be able to rise and fall on a vehicle body, and that can hold the seat back in an upright position by engaging with a striker fixed to the vehicle body; And a sensing lever capable of detecting a locked state in which the striker is engaged with the hook lever by abutting against the striker (see, for example, Patent Document 1).

JP 2007-196722 A

  However, in the conventional vehicle seat lock device as described above, the unlocked state in which the hook lever is not engaged with the striker and the detection of the engaged locked state are detected by the unlocked position and the locked position of the sensing lever. It is determined. For this reason, if the striker entry position with respect to the seat lock device deviates in the vertical direction with respect to the reference position due to the seat mounting position error or the backlash of the movable part of the seat back, the lock position is detected accordingly. The stop position of the sensing lever is also shifted in the vertical direction, and the locked state cannot be detected accurately.

  In view of the above problems, the present invention has an object to provide a vehicle seat lock device capable of accurately detecting a locked state even if the striker approach position with respect to the seat lock device is deviated from the reference position. To do.

  In order to solve the above-described problem, in the vehicle seat lock device according to the first aspect of the present invention, there is provided a base member fixed to either the seat back supported by the vehicle body or the vehicle body, and the base member. And a hook lever that can hold the seat back in an upright position by engaging with a striker fixed to either the seat back or the vehicle body, and is pivotally attached to the base member. At the same time, when the striker is not engaged with the hook lever, it stops at the unlock detection position where it is not in contact with the striker, and when the striker is engaged with the hook lever, it comes into contact with the striker. A sensing lever that can be moved to a lock detection position, and is pivotally attached to the base member, and an urging portion And when the sensing lever is stopped at the unlock detection position, it stops at the unlock position contacting the sensing lever against the biasing force of the biasing member. When the sensing lever is moved to the lock detection position, the sensing lever is brought into a non-contact state with respect to the sensing lever, so that the biasing force of the biasing member moves to the lock position that contacts the base member and stops. And a working lever.

In the vehicle seat lock device according to the second aspect of the present invention, a seat back that is supported by the vehicle body so as to be able to rise and fall, or a base member fixed to the vehicle body, and pivotally attached to the base member. A function of holding the seat back in an upright position by engaging with a striker fixed to either the seat back or the vehicle body , and when not engaging with the striker, A hook and sensing lever having a function of moving to the unlocked position from the unlocked position when it is stopped at the contacting unlocked position and engaged with the striker, and pivotally attached to the base member. biased by energizing member in one direction, and when the hook and sensing lever is stopped in the unlocked position The, against the biasing force of the biasing member, stops at the unlock position abuts against the said hook and sensing lever, also when the hook and sensing lever is moved to the locked position, the hook and sensing lever And an action lever that moves to a locked position where it abuts against the base member by the urging force of the urging member and stops.

According to a third aspect of the invention, there is provided the vehicle seat lock device according to the first aspect of the invention, wherein the action lever rotates in the unlocking direction beyond the unlock position from the lock position, whereby the hook lever There is an action part which can be rotated in the direction which makes it detach from a striker.

  According to the present invention, since the lock position of the action lever is determined by the position in contact with the base member, the action lever always stops at the predetermined lock position even if the striker entry position with respect to the seat lock device deviates from the reference position. can do. As a result, it can be reliably detected that the striker is engaged with the hook lever.

It is a perspective view of the rear seat for vehicles to which the present invention is applied. It is a side view of the seat lock device concerning the present invention. It is a perspective view of a seat lock device similarly. It is a side view of the seat lock device in the locked state. It is a side view of a seat lock device at the time of lock release operation similarly. It is a side view of the seat lock device in the unlocked state of another embodiment concerning the present invention. It is a side view of the seat lock device in the locked state.

  Hereinafter, an embodiment according to the present invention will be described with reference to the drawings. In the following description, the left in FIGS. 1, 2, 4, and 5 and the upper left in FIG. 3 are defined as “front”, the right in FIGS. 1, 2, 4, and 5, and the lower right in FIG. “Back”.

  As shown in FIG. 1, the rear seat 1 is supported by a seat cushion 2 installed on the vehicle floor and a rearward end portion of the seat cushion 2 so as to be tiltable in the front-rear direction by a hinge shaft (not shown) facing in the left-right direction. And a seat back 3.

  The seat back 3 is engaged with a striker 5 fixed to the vehicle body by a seat lock device 4 mounted inside, so that the seat back 3 is tilted backward from the first standing position and the first standing position shown by a solid line in FIG. Based on the operation of the warning member 6 provided on the shoulder portion of the seat back 3, it can be held at the second standing position indicated by the dotted line and moved to the lying position indicated by the two-dot chain line that falls forward. Can do.

  As shown mainly in FIG. 2, the striker 5 is fixed to the vehicle body that faces the side portion of the seat back 3, and the front side first engagement portion 51 and the rear side that is spaced rearward from the first engagement portion 51. Second engaging portion 52.

  The seat lock device 4 includes a metal base plate 71 fixed to a seat frame in the seat back 3 by bolts (not shown), and a metal cover plate 72 fixed to face the side surface of the base plate 71. A base member 7 is provided. A striker entry groove 73 that faces the front-rear direction in which the first and second engaging portions 51 and 52 of the striker 5 can enter from the rear when the seat back 3 is erected is provided in the substantially central portion of the base member 7. Yes.

  Between the base plate 71 and the cover plate 72, the seat back 3 can be held in the first or second standing position by engaging with the first engaging portion 51 or the second engaging portion 52 of the striker 5. It is determined whether or not the hook lever 8 is engaged with the hook lever 8, the open lever 9 that forms a working lever connected to the warning member 6 via a connecting rod 10 such as a rod that faces in the vertical direction, and the striker 5. A detectable sensing lever 11 is provided. 3 to 5, the cover plate 72 is indicated by a two-dot chain line in order to clearly show the internal configuration of the seat lock device 4.

  The hook lever 8 is pivotally mounted in the vicinity of the front portion of the striker entry groove 73 in the base member 7 by the first pivot shaft 12 whose front portion is directed in the left-right direction, and is wound around the first pivot shaft 12. The first spring 13 (first urging member) is urged in the engaging direction (downward).

  A lower portion of the hook lever 8 near the rear end portion is provided with a first engagement groove 81 that opens at the lower side where the first engagement portion 51 or the second engagement portion 52 of the striker 5 can be engaged. On the front side of the first engagement groove 81, a second engagement groove 82 that can be engaged with the first engagement portion 51 is provided. In addition, an inclined edge 83 is provided at the rear end edge of the hook lever 8, and a first arm portion 84 extending downward is provided between the inclined edge 83 and the first engagement groove 81. Between the first engagement groove 81 and the second engagement groove 82, a second arm part 85 extending downward from the first arm part 84 is provided. Further, an engagement shaft 86 protruding in the left-right direction is provided on the side surface of the hook lever 8.

  When the hook lever 8 is in an unlocked state where the hook lever 8 is not engaged with the striker 5 (when the seat back 3 is in the lying down position), the unlocked position where the lower end of the second arm portion 85 abuts against the base plate 71 (FIG. 2). 3) and the first engagement groove 81 is engaged with the first engagement portion 51 or the second engagement portion 52 of the striker 5 (the seat back 3 is in the first standing position or the second engagement position 81). 2 (when held in the upright position), it moves to a lock position (see FIG. 4) rotated by a predetermined angle above the unlock position against the urging force of the first spring 13, and a warning member 6, as described later, the first engagement groove 81 is rotated in the unlocking direction (counterclockwise in FIG. 4) from the locked position, and the first engaging portion 51 or the second engaging portion 52 is rotated. Move to unlock position (see Fig. 5) That.

  When the seat back 3 is held in the first standing position, the first engaging portion 51 of the striker 5 is engaged with the first engaging groove 81 of the hook lever 8 as shown in FIG. Similarly, when held in the second standing position, the first engagement portion 51 engages with the second engagement groove 82 and the second engagement portion 52 engages with the first engagement groove 81. Engage.

  The sensing lever 11 is pivotally mounted on the second pivot 14 so as to overlap the hook lever 8 in the left-right direction above the striker entry groove 73 in the base member 7 by the second pivot 14 facing the left-right direction. It is urged downward by the mounted second spring 15 (second urging member). At the rear of the sensing lever 11, when the first engaging portion 51 or the second engaging portion 52 of the striker 5 is engaged with the first engaging groove 81 of the hook lever 8, the first engaging portion 51 or the second engaging portion A downward mountain-shaped detection unit 112 that can ride on the engagement unit 52 is provided.

  In the unlocked state where the striker 5 is not engaged with the hook lever 8, the sensing lever 11 is provided at the front end of the sensing lever 11 by the biasing force of the second spring 15 as shown in FIGS. When the protruding contact portion 111 contacts the stopper portion 74 provided on the base plate 71, the protruding stop portion 111 stops at the unlock detection position (see FIGS. 2 and 3). In addition, as shown in FIG. 4, when the first engagement portion 51 of the striker 5 is engaged with the first engagement groove 81 of the hook lever 8, the sensing lever 112 is in the first engagement with the detection portion 112. By riding on the part 51, it moves from the unlock detection position to the lock detection position rotated by a predetermined angle.

  The open lever 9 is pivotally attached to the upper side of the striker entry groove 73 in the base member 7 by a third pivot 16 that faces in the left-right direction, and a third spring 17 (third biasing member) wound around the third pivot 16. ) Is biased in the unlocking direction (counterclockwise in FIGS. 2 to 5). The urging force of the third spring 17 acting on the open lever 9 is set to be smaller than the urging force of the second spring 15 acting on the sensing lever 11.

  A first action portion 91 that can be in contact with a stopper portion 113 provided on the upper edge of the front portion of the sensing lever 11 is provided at the front end portion of the open lever 9, and an engagement shaft 86 of the hook lever 8 is also provided at the lower portion. A possible second action part 92 and a connecting part 93 to which the lower end of the connecting rod 10 is connected are respectively provided at the rear part.

  When the sensing lever 11 is in the unlock detection position, the open lever 9 has a third spring as shown in FIGS. 2 and 3 by the first action portion 91 abutting against the stopper portion 113 of the sensing lever 11. When the sensing lever 11 moves to the lock detection position against the urging force 17 and the sensing lever 11 moves to the lock detection position, the urging force of the third spring 17 causes the unlocking as shown in FIG. The first action portion 91 moves to a lock position where it abuts against a stopper portion 75 provided on the base plate 71 and stops.

  The warning member 6 includes a cylindrical guide member 61 that is attached to the shoulder portion of the seat back 3 and faces upward and downward, and an operation button 62 that is slidably accommodated in the guide member 61 in the vertical direction. .

  The operation button 62 is connected to the connecting portion 93 of the open lever 9 via the connecting rod 10, and when the open lever 9 is in the locked position in synchronization with the operation of the open lever 9, as shown in FIG. When the open lever 9 is in the unlocked position, the upper surface is immersed in the guide member 61 by a predetermined amount as shown in FIG. Stop at the unlocked position. Further, when the operation button 62 is in the lock position, as shown in FIG. 5, when the operation button 62 is moved to the operation position beyond the unlock position, the open lever 9 rotates to the lock release position. When the open lever 9 is rotated to the unlocked position, the second operating portion 92 of the open lever 9 contacts the engagement shaft 86 of the hook lever 8, whereby the hook lever 8 is rotated to the unlocked position.

Next, each state and operation of this embodiment will be described.
(I) When the seat back 3 is in the lying position (when the striker 5 is not engaged with the hook lever 8):
As shown in FIGS. 2 and 3, the hook lever 8 is held in the unlocked position by the biasing force of the first spring 13, and the sensing lever 11 is held in the unlocked position by the biasing force of the second spring 15. . The open lever 9 stops at the unlocked position against the urging force of the third spring 17 by the first action portion 91 coming into contact with the stopper portion 113 of the sensing lever 11. Further, the operation button 62 is stopped at the unlock position where the operation button 62 is immersed in the guide member 61 by a predetermined amount.

  In this state, since the unlock detection position of the sensing lever 11 is determined by the position where the contact portion 111 contacts the stopper portion 74 of the base plate 71, the positional relationship between the seat lock device 4 and the striker 5 is determined. Even if there is a gap, it is constant. Therefore, the open lever 9 and the operation button 62 are also stopped at a predetermined unlock position. Thus, the occupant can confirm the unlocked state in which the striker 5 is not engaged with the hook lever 8 based on the unlock position where the upper surface of the operation button 62 is immersed in the guide member 61.

(Ii) When moving the seat back 3 from the lying position to the first standing position:
When the seat back 3 is erected from the lying position, the first engaging portion 51 of the striker 5 enters the striker entry groove 73 and comes into contact with the inclined edge 83 of the hook lever 8, and then is provided at the tip of the sensing lever 11. Abut against the inclined edge. Accordingly, the hook lever 8 rotates upward from the unlock position against the biasing force of the first spring 13, and the sensing lever 11 moves upward against the biasing force of the second spring 15. The detection unit 112 rides on the first engagement unit 51 and moves to the lock detection position.

  When the sensing lever 11 moves to the lock detection position, the open lever 9 is moved by the urging force of the third spring 17 based on the fact that the stopper portion 113 of the sensing lever 11 is separated from the first action portion 91 of the open lever 9. The first action part 91 moves to the lock position where it abuts against the stopper part 75 of the base plate 71 and stops. As a result, the operation button 62 moves from the unlock position to the lock position.

(Iii) When the seat back 3 is held in the first standing position (or the second standing position):
As shown in FIG. 4, the first engagement portion 51 (or the second engagement portion 52) of the striker 5 is engaged with the first engagement groove 81 of the hook lever 8. The sensing lever 11 moves to the lock position where the detection unit 112 rides on the first engagement portion 51 (or the second engagement portion 52) of the striker 5, and the stopper portion 113 is the first action portion 91 of the open lever 9. It is away from. The open lever 9 moves to the lock position where the first action portion 91 abuts against the stopper portion 75 of the base plate 71 by the biasing force of the third spring 17 due to the separation of the stopper portion 113 from the first action portion 91. .

  In this state, the lock position of the operation button 62 is determined by the position where the first action portion 91 of the open lever 9 is in contact with the stopper portion 75 of the base plate 71, so that the striker 5 enters the seat lock device 4. Shifts in the vertical direction with respect to the reference position, so that the lock detection position of the sensing lever 11 is kept constant even if it deviates from a predetermined set position. Therefore, the occupant can confirm the locked state in which the striker 5 is engaged with the hook lever 8 based on the locked position where the upper surface of the operation button 62 is flat with the guide member 61.

(Iv) When moving the seat back 3 from the first standing position to the lying position:
As shown in FIG. 5, the operation button 62 is pushed from the lock position to the operation position beyond the unlock position. As a result, the open lever 9 rotates against the biasing force of the third spring 17 in the unlocking direction (clockwise in FIG. 4) beyond the unlock position from the lock position, The hook lever 8 is rotated to the unlocking position via the engagement shaft 86. When the hook lever 8 is rotated to the unlocking position, the first engaging portion 51 of the striker 5 is detached from the first engaging groove 81 of the hook lever 8, and the seat back 3 can be moved to the lying down position.

  6 and 7 show another embodiment according to the present invention. This other embodiment includes a hook and sensing lever 100 in which the hook lever 8 and the sensing lever 11 in the above embodiment are integrated. The hook / sensing lever 100 includes a first engagement groove 81, a second engagement groove 82, an inclined edge 83, a first arm portion 84, a second arm portion 85, and an engagement shaft 86 of the hook lever 8 in the embodiment. Corresponding to the contact portion 111 and the stopper portion 113 of the sensing lever 11, the first engagement groove 101, the second engagement groove 102, the inclined edge 103, the first arm portion 104, the second arm portion 105, and the engagement. The shaft 106, the contact portion 107, and the stopper portion 108 are integrally formed. Other configurations are the same as those in the above embodiment.

  As shown in FIG. 6, when the first engagement portion 51 of the striker 5 is not engaged with the first engagement groove 101 of the hook and sensing lever 100, the contact portion of the hook and sensing lever 100 is The hook and sensing lever 100 stops at the unlocked position when 107 abuts against the stopper 74 or the tip of the second arm 105 abuts against the base plate 71. Further, the open lever 9 stops at the unlocked position when the first action portion 91 abuts against the stopper portion 108 of the hook and sensing lever 100.

  As shown in FIG. 7, in the locked state where the first engagement portion 51 of the striker 5 is engaged with the first engagement groove 101 of the hook and sensing lever 100, the hook and sensing lever 100 has moved to the locked position. Accordingly, the stopper portion 108 is separated from the first action portion 91 of the open lever 9. As a result, the open lever 9 moves to a lock position where the first action portion 91 contacts the stopper portion 75 of the base plate 71 and stops. In synchronization with this, the operation button 62 also moves to the lock position.

  In another embodiment, the hook lever 8 and the sensing lever 11 of the above embodiment are integrated, so that the configuration can be simplified.

DESCRIPTION OF SYMBOLS 1 Rear seat 2 Seat cushion 3 Seat back 4 Seat lock device 5 Striker 6 Warning member 7 Base member 8 Hook lever 9 Open lever (action lever)
10 connecting rod 11 sensing lever 12 first pivot 13 first spring (first biasing member)
14 Second pivot 15 Second spring (second biasing member)
16 Third pivot 17 Third spring (third biasing member)
51 First engagement portion 52 Second engagement portion 61 Guide member 62 Operation button 71 Base plate 72 Cover plate 73 Striker entry groove 74 Stopper portion 75 Stopper portion 81 First engagement groove 82 Second engagement groove 83 Inclined edge 84 First 1 arm part 85 second arm part 86 engagement shaft 91 first action part 92 second action part 93 connection part 111 contact part 112 detection part 113 stopper part 100 hook and sensing lever (hook lever)
101 First engagement groove 102 Second engagement groove 103 Inclined edge 104 First arm portion 105 Second arm portion 106 Engagement shaft 107 Contact portion 108 Stopper portion

Claims (3)

A base member fixed to either the seat back supported by the vehicle body or the vehicle body or the vehicle body;
A hook lever pivotally attached to the base member and capable of holding the seat back in an upright position by engaging with a striker fixed to either the seat back or the vehicle body;
When the striker is not engaged with the hook lever, it stops at the unlock detection position that is not in contact with the striker, and the striker engages with the hook lever. A sensing lever that can move to a lock detection position that contacts the striker;
While being pivotally attached to the base member and being urged in one direction by the urging member, and when the sensing lever is stopped at the unlock detection position, the urging force of the urging member is resisted. When the sensing lever stops at the unlock position where it abuts the sensing lever, and when the sensing lever moves to the lock detection position, the sensing lever is brought into a non-abutting state, whereby the urging force of the urging member A vehicle seat lock device comprising: an action lever that moves to a lock position that contacts the base member and stops. A base member fixed to either the seat back supported by the vehicle body or the vehicle body or the vehicle body;
A function of holding the seat back in an upright position by engaging with a striker that is pivotally attached to the base member and fixed to either the seat back or the vehicle body , and is engaged with the striker. When not, the hook and sensing lever having a function of stopping at the unlocked position that contacts the base member and enabling the shifter to move from the unlocked position when engaged with the striker;
While being pivotally attached to the base member and being biased in one direction by the biasing member, and when the hook and sensing lever is stopped at the unlocked position, the biasing force of the biasing member is resisted, stop the unlock position abuts against the said hook and sensing lever, also when the hook and sensing lever is moved to the locked position, by a non-contact state with respect to the hook and sensing lever, said biasing A vehicle seat lock device comprising: an action lever that moves to a lock position that contacts the base member by an urging force of the member and stops. The operation lever includes an operation section that can rotate the hook lever in a direction in which the hook lever is detached from the striker by rotating in the unlocking direction beyond the unlock position from the lock position. 1 Symbol placement of the vehicle seat lock device.

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