JP4341354B2 - Lock device for vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat locking device capable of locking a seat to a vehicle body side or releasing the lock.

Conventionally, a vehicle seat locking device that holds a vehicle seat with respect to a vehicle floor has various structures, for example, a structure described in Patent Document 1.
The locking device according to Patent Document 1 is capable of rotating with respect to a base plate in a pair of base plates opposed to each other in a plate shape attached to the lower side of the lower surface of the seat cushion, and a space formed between the base plates. And a plate-like latch and a plate-like pole. The cam member is supported so as to be rotatable with respect to the pole. Each base plate has a recess into which a striker provided on the vehicle floor side is detachably inserted.

The latch has a structure that latches on the striker by swinging in a state where the striker is inserted into the recess of the base plate. In addition, between the cam member and the pole, a spring having one end formed at the locking portion of the pole and the other end locked at the locking portion of the cam member is stretched. In response to the urging force, the striker was constantly urged to rotate from above. In this way, the locking device prevents rattling from occurring between the latch and the striker by preventing the latch from swinging while the latch is engaged with the striker.
Japanese Patent Laid-Open No. 11-208333

  However, since the striker is urged by a single cam member in the above-described locking device, the cam member is urged only at one end with respect to the length direction of the striker, and the other end generates play at the other end. The stability in the locked state was low.

  The present invention has been made in view of such a point, and an object of the present invention is to provide a vehicle seat locking device that can fix a vehicle seat to a vehicle floor without rattling.

The present invention is for achieving the above object, and is configured as follows.
The invention according to claim 1 is a striker provided on one of the vehicle body side or the seat side, a base plate provided on the other side of the vehicle body side or the seat side, and having a recess capable of receiving the striker. On the other hand, a latch that is supported so as to be able to swing in the locked state or unlocked state engaged with the striker, and also supported so that it can swing to the position where the latch is held in the locked state or unlocked state with respect to the base plate. A vehicle seat locking device comprising: a suspended pole; and a cam member for absorbing play between the striker and the latch in a locked state to eliminate play.
A pair of base plates are provided in the length direction of the striker,
Between the pair of base plates, a pair of cam members that are in contact with each other in the length direction of the striker and sandwiching the latch and the pole are provided so as to be pivotally supported with respect to the pair of base plates. And
The pair of cam members are formed with cam surfaces that can be engaged with the striker.
When the latch is in the locked state, the pair of cam members are configured such that each cam surface independently presses the striker against the recess of the base plate more than an error occurring in one or both of the base plate and the striker .
According to this configuration, even when the latch is locked in a state where an error occurs due to assembly and / or molding or wear on the base plate or the striker, the striker has a pair of cam members on the left and right in the length direction. By pressing the striker against the left and right base plates by receiving the urging force from each cam surface, the striker can be sandwiched on both sides of the hook and the pole at a total of four points of the left and right cams and the left and right base plates. Therefore, even if an error occurs as described above, the error can be sufficiently absorbed by the urging force, and a locked state with high stability (locked state with looseness) can be maintained.

The best mode for carrying out the present invention will be described below with reference to the drawings.
The embodiment will be described with reference to FIGS.
FIG. 1 is a side view showing a retractable rear seat for a vehicle. In order to store this type of seat, first, a reclining device (not shown) is operated, and the seat back 12 is brought down toward the seat cushion 10 as shown in the figure. At the same time, the lock of the locking device 20 that connects the rear lower portion of the seat cushion 10 and the floor 13 is released. After that, the seat cushion 10 is rotated with its front side end as a fulcrum, and the whole is stood against the back surface of the front seat (not shown).

  As a structure for that purpose, the front side end portion of the cushion frame 11 in the seat cushion 10 is connected to a hinge bracket 14 fixed to the floor 13 by a rotating shaft 15. The locking device 20 is configured to be locked and unlocked between the rear side lower portion of the cushion frame 11 and the floor 13 side. Note that the rear seat is generally three-seater, and the connecting portion and the locking device 20 by the rotating shaft 15 are disposed on both sides of the seat, for example.

The locking device 20 moves together with the seat cushion 10 from above toward the striker 46 laid on the floor 13 and is hooked to the striker 46 as shown in FIG. Then, by pulling the operation cable 70 shown in FIG. 4 upward, the hook is released from the striker 46 as shown in FIG.
Hereinafter, the structure of the locking device 20 will be described in detail.
As shown in FIG. 4, the lock device 20 has two base plates 22 and 23. Between the two base plates 22 and 23, the two cam members 40 and 41 and the latch 26 and the pole 30 are further sandwiched between the cam members 40 and 41 are assembled. Note that the latch 26 and the pole 30 are disposed in substantially the same plane.

  As shown in FIG. 4, a spacer 50 is held between the base plates 22 and 23 at a predetermined distance. The spacer 50 is attached to the base plates 22 and 23 via the attachment member 52. Further, the base plates 22 and 23 are provided with concave portions 24 and 27 opened downward at the lower end portions. The recesses 24 and 27 can receive the striker 46 from the open side, and the opening width is gradually increased downward to facilitate the reception. Further, long hole-shaped guide portions 22a and 23a are provided on the front side of the lower portions of the base plates 22 and 23. The base plates 22 and 23 have mounting portions 22c, 22d, 22e, 23c, 23d, and 23e formed in a through hole shape. An attachment pin 56 is attached to the attachment portions 22c and 23c, and the cam members 40 and 41 are attached to the attachment pin 56 so as to be swingable.

  Further, a support pin 32 is attached to the attachment portions 22d and 23d, and the pole 30 is attached to the support pin 32 so as to be able to swing, and the interference between the pole 30 and the cam members 40 and 41 at the time of swinging. In order to prevent this and make it easy to swing, annular spacers 64 and 66 are inserted into the support pin 32 on both sides of the pole 30. The support pin 32 can rotate integrally with the pole 30 and can rotate with respect to the base plates 22 and 23. Further, a support pin 28 is attached to the attachment portions 22e, 23e, and a latch 26 is attached to the support pin 28 so as to be able to swing, and interference between the latch 26 and the cam member 40 is prevented at the time of swinging. An annular spacer 68 is inserted into the support pin 28 on the cam member 40 side of the pole 30 to facilitate the swinging. The latch 26 and the pole 30 can be smoothly swung by the spacers 64, 66 and 68. The base plate 22 includes a through-hole-shaped spring hooking portion 22 b that can suspend one end of an elastic member (for example, a torsion coil spring) 42.

  As shown in FIG. 4, the latch 26 has a mounting hole 26e into which the support pin 28 is inserted. A hook portion 26a is provided at the lower portion, a spring hooking hole 26c is provided at the upper portion, and a convex protrusion 26b is provided from the center front. As shown in FIG. 2, the hook portion 26 a extends in a hook shape so as to be hooked on the striker 46. Therefore, as shown in FIGS. 2 and 8, the hook portion 26 a is engaged with the striker 46 by advancing with respect to the recesses 24 and 27 by swinging the latch 26.

  As shown in FIGS. 2 and 8, the protrusion 26b advances and retracts relative to the recesses 24 and 27 by swinging the latch 26. Then, as shown in FIG. 8, the protrusion 26 b advances into the recesses 24 and 27 in a state where the hook portion 26 a is not hooked on the striker 46. Therefore, when the striker 46 is inserted into the recesses 24 and 27, the protrusion 26 b is pushed upward by the striker 46. Then, the latch 26 swings, and the hook portion 26a is hooked on the striker 46 as shown in FIG. 2 and 8, the latch 26 includes an engaging surface 26d above the hook portion 26a and an engaging surface 26f further above the engaging surface 26d.

The pole 30 has a mounting hole 30d as shown in FIG. 4, and a spring hooking hole 30c at the top. As shown in FIG. 2, one end of an elastic member 34 (for example, a coil spring or the like) is hooked on the spring hooking hole 30c. The other end of the elastic member 34 is hooked on the spring hooking hole 26 c of the latch 26. Therefore, the elastic member 34 is biased in the direction of narrowing the interval between the spring hooking holes 30c and 26c, and presses the latch 26 and the pole 30 together.
Further, the pole 30 has a protrusion 30b at the end in the direction opposite to the locking surface 30a.

  As shown in FIG. 4, the cam members 40 and 41 are a set of two pieces having the same shape, and a spring hook pin 58 is inserted into the mounting holes 40 c and 41 c to couple the cam members 40 and 41. In addition, the cam members 40 and 41 are joined to the mounting holes 40b and 41b by inserting a guide member 60 having an annular spacer 62 around the periphery thereof. The guide member 60 is inserted through the mounting holes 40b and 41b and is also inserted into the guide portions 22a and 23a of the base plates 22 and 23. The pair of cam members 40 and 41 coupled in this way can swing only the opening range of the guide portions 22a and 23a with respect to the base plates 22 and 23 by inserting the mounting pins 56 into the mounting holes 40d and 41d. It is pivotally supported.

  Further, the elastic member 42 is provided on the periphery of the mounting pin 56 via the roller member 54, one end of the elastic member 42 is engaged with the spring hook pin 58, and the other end is engaged with the spring hook portion 22 b of the base plate 22. Yes. The elastic members 42 urge the cam members 40 and 41 around the axis of the mounting pin 56 in the clockwise direction in FIG. As shown in FIG. 2, the cam members 40 and 41 have cam surfaces 40 a and 41 a that can be engaged with the striker 46 received in the recesses 24 and 27.

  Therefore, the cam surfaces 40 a and 41 a of the cam members 40 and 41 always press the striker 46 in the locked state against the back side of the recesses 24 and 27. As a result, the striker 46 is sandwiched between the recesses 24 and 27 and the cam surfaces 40a and 41a (FIG. 2), and the play provided between the hook portion 26a of the latch 26 and the striker 46 is absorbed. It becomes a locked state in which backlash is performed. Further, in this locked state, the locking surface 30a of the pole 30 and the locking surface 26d of the latch 26 are engaged and are in a stable state.

FIG. 3 is a view for explaining the vicinity of the striker 46 in the cross-sectional view taken along the line AA in FIG.
As shown in FIG. 3, in the locked state, the cam members 40, 41 press the striker 46 against the recesses 24, 27 of the base plates 22, 23 evenly from the bottom to the top. Therefore, the striker 46 is backlashed equally on the left and right, and is in a locked state with high stability.

  Next, the locked state in the case where an error occurs due to the displacement of the base plates 22 and 23 and the assembly and / or molding or wear (local depression) of the striker 46 will be described. FIG. 5 is a diagram illustrating the lock device 20 when an error occurs as described above. 6A is a diagram for explaining the vicinity of the striker 46 in the cross-sectional view taken along the line B-B in FIG. 5 when the base plates 22 and 23 are displaced and an error occurs. These are the figures explaining the striker 46 vicinity of the BB cross-section arrow line view of FIG. 5 when the error by abrasion arises in the striker 46, for example.

  First, as shown in FIG. 6 (A), when the base plate 22, 23 is in a locked state with an error ("H1" shown in FIG. 6 (A)), for example, the striker 46 is distorted (shown). At the right). At this time, as shown in FIG. 5, the cam surfaces 40a and 41a of the cam members 40 and 41 press the striker 46 in a state where the front cam member 40 is slightly shifted counterclockwise with respect to the back cam member 41. It will be. In order for the cam members 40 and 41 to be in a shifted state with the mounting pin 56 as a fulcrum, the mounting holes 40b and 41b and the guide member 60, and the mounting holes 40c and 41c and the spring hook pin are used. 58, a gap ("H" described in FIG. 6A) more than the error of the base plates 22 and 23 ("H1" described in FIG. 6A) is required, that is, "H". ≧ “H1”. This gap allows the guide member 60 and the mounting pin 56 to be tilted, and the cam members 40 and 41 can abut against the striker independently.

  Next, as shown in FIG. 6 (B), when an error ("H1" described in FIG. 6 (B)) occurs due to wear of the striker 46, the base plates 22, 23 are brought into the locked state. Similar to the case where an error occurs, the cam surface 40a of each cam member 40, 41 is in a state where the cam member 40 on the near side is slightly shifted counterclockwise with respect to the cam member 41 on the back as shown in FIG. Will press the striker 46. In order for the cam members 40 and 41 to be in a shifted state with the mounting pin 56 as a fulcrum, the mounting holes 40b and 41b and the guide member 60, and the mounting holes 40c and 41c and the spring hook pin are used. 58, a skie (“H” described in FIG. 6B) that is greater than the error of the striker 46 (“H1” described in FIG. 6B) is required, that is, “H” ≧ “ H1 ". This gap allows the guide member 60 and the mounting pin 56 to be tilted, and the cam members 40 and 41 can abut against the striker independently.

  Then, as shown in FIGS. 6A and 6B, the cam members 40 and 41 are formed in the recesses of the base plates 22 and 23 so that the cam members 40 and 41 are independent from the lower side to the upper side equally so as to correspond to the error of the striker 46. 24, 27. Therefore, even if the base plates 22 and 23 and the striker 46 have an error, the base plates 22 and 23 and the striker 46 are evenly squeezed right and left and become a locked state with high stability.

  Subsequently, an unlocking operation for changing the above-described locked state to an unlocked state will be described. First, as shown in FIG. 4, one end 36 a of the release lever 36 is coupled to the end of the support pin 32 positioned outside the base plate 22, and the operation cable 70 is coupled to the other end. In the drawing, when the operation cable 70 is pulled upward by a lock release operation, the pole 30 is rotated counterclockwise in FIG. 2 through the release lever 36 and the support pin 32.

  FIG. 7 is a diagram illustrating the lock device 20 in the middle of unlocking, and FIG. 8 is a diagram illustrating the lock device 20 in the unlocked state. By rotation of the pole 30 accompanying the unlocking operation, the lower surface of the protrusion 30b of the pole 30 presses the guide member 60 that connects the cam members 40 and 41 as shown in FIG. Then, the cam members 40 and 41 are rotated counterclockwise along the guide portions 22a and 23a by this pressing, and the cam surfaces 40a and 41a are detached from the striker 46. As a result, the pressing force to the striker 46 by the cam members 40 and 41 is released. When the pole 30 and the cam members 40 and 41 are further rotated, as shown in FIG. 8, the locking surface 30a of the pole 30 and the locking surface 26e of the latch are engaged, and the hook portion 26a for the striker 46 is engaged. It becomes stable in the state where the engagement is released and the lock is released.

In addition, this invention is not limited to embodiment, The following forms may be sufficient.
(1) That is, the locking device 20 according to the embodiment is attached to the seat cushion 20 and used when the seat cushion 20 is fixed to the floor 13. However, the locking device 20 may be attached to the seat back 12 and used when the seat back 12 is fixed to the floor 13.
(2) The locking device 20 according to the embodiment is provided in the seat cushion 10. However, the lock device 20 may be provided on the floor 13 and the lock device 20 may be hooked on the striker 46 provided on the seat cushion 10 or the seat back 12.
(3) Moreover, the seat cushion 10 according to the embodiment is configured to be pivotally attached to the floor 13 by the pivot mechanism. However, the seat cushion 10 or the seat back 12 is structured to be detachably attached to the floor 13, and the lock device 20 is used to fix the seat cushion 10 or the seat back 12 so as to be detachable. May be.
(4) Further, the cam members 40 and 41 according to the embodiment are supported by the single mounting pin 56 with respect to the base plates 22 and 23 as the same shaft. However, it may be a form that is individually supported by a mounting pin. In that case, two mounting pins are required.

It is a side view showing the retractable rear seat for vehicles. It is a figure explaining the locked state of the locking device 20 which concerns on this invention. It is a figure explaining the striker 46 vicinity of the AA sectional view taken on the line of FIG. 3 is an exploded perspective view showing main parts of the locking device 20. FIG. It is a figure explaining the locked state of the locking device 20 which concerns on this invention, and is a case where the striker 46 has backlash. It is a figure explaining the striker 46 vicinity of the BB sectional view taken on the line of FIG. It is a figure explaining the unlocking middle of lock device 20 concerning the present invention. It is a figure explaining the lock release state of the locking device 20 concerning the present invention.

Explanation of symbols

20 Locking device 22, 23 Base plate 24, 27 Recess 26 Latch 30 Pole 40, 41 Cam member 46 Striker

Claims (1)

A striker provided on one of the vehicle body side or the seat side, a base plate provided on the other side of the vehicle body side or the seat side and having a recess capable of receiving the striker, and a lock engaged with the striker with respect to the base plate A latch that is supported so that it can be swung in a state or an unlocked state, a pole that is also supported so that it can be swung to a position that holds the latch in a locked state or an unlocked state with respect to the base plate, and A vehicle seat locking device comprising a cam member for absorbing play between the striker and the latch to eliminate play.
A pair of base plates are provided in the length direction of the striker,
Between the pair of base plates, a pair of cam members that are in contact with each other in the lengthwise direction of the striker and sandwiching the latch and the pole are provided so as to be pivotally supported with respect to the pair of base plates. And
The pair of cam members are formed with cam surfaces that can be engaged with the striker.
When the latch is in the locked state, the pair of cam members is a vehicle seat locking device that presses the striker against the recess of the base plate more than the error that each cam surface independently occurs in one or both of the base plate and the striker .

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