JP4216640B2 - Seat cushion locking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seat cushion locking device.
[0002]
[Prior art]
Conventionally, for example, in a vehicle seat, as shown in FIG. 6 (a), a recess 2a for storage is formed in the floor 2 at the rear position of the rear seat 1, and the seat in the seating position U as shown in FIG. 6 (b). As shown in FIG. 6C, the seat back 4 is moved backward together with the seat cushion 3 to be stored in the storage position D in the storage recess 2a while the seat back 4 is moved forward with respect to the cushion 3. There are some (see, for example, Patent Document 1). FIG. 6 shows a so-called 5: 5 divided rear seat 1, in which only the right rear seat 1 is shown, and the left rear seat is not shown.
[0003]
FIGS. 7A to 7C show the internal structure of the rear seat 1 corresponding to FIGS. 6A to 6C.
[0004]
The back frame (including the meaning of the seat back 4) 4A of the seat back 4 (including the meaning of the seat back 3) is also included in the cushion frame (including the meaning of the seat cushion 3). The shaft 5 is supported so as to tilt forward and backward, and the reclining mechanism 6 can adjust the forward and backward tilt angle of the back frame 4A.
[0005]
The cushion frame 3A is supported by the link mechanism 7 of the floor 2 and moves upward from the storage position D to the seating position U as shown in FIG. 8A, and as shown in FIG. 8B. Furthermore, it moves downward from the seating position U to the storage position D.
[0006]
As shown in FIG. 7 (a), the cushion frame 3A is provided with a back motion torsion bar 8 and an upward motion torsion bar 9, and the cushion frame 3A is moved in the rear motion direction by the rear motion torsion bar 8. While being urged, it is urged in the upward movement direction by the upward movement torsion bar 9.
[0007]
As shown in FIG. 9A, the upper vertical wall 2b of the floor 2 at the seating position U is provided with a seating position striker 10 protruding rearward in a horizontal state, and a storage recess at the storage position D. On the bottom wall 2c of 2a, there is provided a storage position striker 11 that protrudes upward in a vertical state. FIG. 9A shows the strikers 10 and 11 of the left and right rear seats 1, and the right rear seat 1 uses only the strikers indicated by reference numerals 10 (R) and 11 (R). Is.
[0008]
As shown in FIG. 9B, the cushion frame 3A is engaged with the seating position striker 10 (R) from the front movement direction to lock the cushion frame 3A in the seating position U at the lower front portion of the cushion frame 3A. A lock mechanism 12 and a storage position lock mechanism 13 for engaging the storage position striker 11 (R) in the downward movement direction to lock the cushion frame 3 </ b> A at the storage position D are provided.
[0009]
10 (a) and 10 (b), the lock plate 16A of the seating position lock mechanism 12 is locked and rotated with the lock groove 16a engaged with the seating position striker 10 from the forward movement direction E. The seat cushion 3 is locked at the seating position U by being locked by the lock lever 17A, and the lock plate 16B of the storage position lock mechanism 13 is, as shown in FIGS. The lock groove 16b is engaged with the storage position striker 11 from the downward movement direction F, is rotated and locked by the lock lever 17B, so that the seat cushion 3 is locked at the storage position D. ing.
[0010]
The lock mechanisms 12 and 13 and the reclining mechanism 6 are connected to an operation lever 15 provided on the back surface of the back frame 3A via cables 14a, 14b, and 14c, respectively, and interlocked with the operation of the operation lever 15. Will be unlocked at the same time.
[0011]
Accordingly, when the operation lever 15 is operated at the seating position U, the seating position locking mechanism 12 and the reclining mechanism 6 are simultaneously unlocked, and the cushion frame 3A is moved backward while the back frame 4A is moved forward by the forward spring. The rear frame 4A is moved back by the moving torsion bar 8, and then the back frame 4A is pressed downward by hand, so that the cushion frame 3A is moved down together with the back frame 4A, and the lock plate of the storage position lock mechanism 13 is used for the storage position. The cushion frame 3A is locked to the storage position D by engaging with the striker 11 from the downward movement direction.
[0012]
When the operation lever 15 is operated at the storage position D, the storage position locking mechanism 13 is unlocked, the cushion frame 3A is moved up by the upward movement torsion bar 9, and then the back frame 4A is moved forward by hand. , The cushion frame 3A is moved forward together with the back frame 4A, the lock plate of the seating position lock mechanism 12 is engaged with the seating position striker 10 from the forward movement direction, and the cushion frame 3A is moved to the seating position U. Become locked.
[0013]
Thereafter, the back frame 4A is raised by hand to the standing position, and the reclining mechanism 6 is operated to adjust the forward / backward tilt position.
[0014]
[Patent Document 1]
JP 2002-160563 A
[Problems to be solved by the invention]
However, the seating position lock mechanism 12 is engaged with the seating position striker 10 from the forward movement direction to lock the cushion frame 3A at the seating position U, and the storage position lock mechanism 13 is lowered to the storage position striker 11. Since the cushion frame 3A is locked in the retracted position by engaging from the moving direction, the engagement directions are different, so it is necessary to provide a total of two lock mechanisms 12, 13 for the seating position and the retracted position. was there.
[0016]
Further, since the two lock mechanisms 12 and 13 cannot be provided at the center position C in the width direction of the sheet 1, it is necessary to provide them with an offset OS from the center position C.
[0017]
Therefore, since the two locking mechanisms 12 and 13 are unlocked by operating the operating lever 15, the operating force of the operating lever 15 is increased, and there is a problem that the operability is poor.
[0018]
Further, since the two lock mechanisms 12 and 13 are necessary, there is a problem that the cost is increased and the weight is increased.
[0019]
Further, since the two lock mechanisms 12 and 13 are provided with an offset OS from the center position C, the sheet 1 is easy to tilt in the width direction, particularly at the storage position D, and there is a step between the left and right sheets 1. There was a problem that it appeared and looked bad.
[0020]
The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a seat cushion locking device that can improve operability and appearance, and can reduce cost and weight. It is.
[0021]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is that the seat cushion 3 has a bottom wall portion 2c of the floor 2 so that the cushion frame 3A moves upward while moving forward and moves downward while moving backward. is supported by a link mechanism 7 provided on, the seat cushion 3 seating, storage position lock mechanism 20 attached to the seat cushion engages the seating position for the striker 10 of the floor 2 top from Maedo direction 3 as well as locked in the seating position U and is configured to lock the seat cushion 3 in the storage position D engages the housing position for the striker 11 provided on the bottom wall 2c of the floor 2 from downward direction, the seating-storage position for locking mechanism 20 is mounted one in the seat cushion 3, the single lock plate 25 of the seating, storage position lock mechanism 20, the seating position Forming a seating position for locking groove 25b to lock rotation of the lock plate 25 engages with the striker 10, a storage position for locking groove 25c for locking rotation of the lock plate 25 engages the storage position for the striker 11 It is characterized by being.
[0022]
As in the second aspect, the lock mechanism 20 and the strikers 10 and 11 can be provided at substantially the center position in the width direction of the seat .
[0023]
Operation and effect of the invention
According to the first aspect of the invention, moves upward while Maedo the seat cushion 3, while supporting the link mechanism 7 of the floor 2 to move downward while Kodo, one in the seat cushion 3 Only the seating / storage position locking mechanism 20 is attached, and a seating position locking groove 25b and a storage position locking groove 25c are formed on the lock plate 25 of the seating / storage position locking mechanism 20 , and the seat cushion 3 When the seat moves forward while moving upward, the seat position lock groove 25b of the lock plate 25 engages with the seat position striker 10 from the forward movement direction to lock the seat cushion 3 in the seat position, and the seat cushion 3 moves to the rear. when moved downward while moving the storage position lock groove 25c of the lock plate 25 is engaged with the downward direction with the striker for housing position Shitokusshi I would like to lock down 3 in the storage position.
[0024]
In this way, since only one seating / storage position locking mechanism 20 needs to be provided on the seat cushion 3 , only one locking mechanism is unlocked by operating the operating lever. The force is reduced and the operability is improved, and the cost is reduced and the weight can be reduced.
[0025]
As in claim 2 , when the single seating / storage position locking mechanism 20 and each striker 10 are provided at a substantially central position in the width direction of the seat, the seat is difficult to tilt in the width direction, particularly in the storage position. There is no step between the left and right sheets, and the appearance is improved.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same number is attached | subjected to the location of the same structure and effect | action as a prior art, and detailed description is abbreviate | omitted.
[0027]
As shown in FIG. 1A, the upper vertical wall 2b of the floor 2 at the seating position U is provided with a seating position striker 10 that protrudes rearward in a horizontal state, and for storing the storage position D. The storage wall striker 11 is provided on the bottom wall 2c of the recess 2a so as to protrude vertically upward. FIG. 9A shows the strikers 10 and 11 of the left and right rear seats 1, and the right rear seat 1 uses only the strikers indicated by reference numerals 10 (R) and 11 (R). Is.
[0028]
In the above prior art, it is necessary to provide the seating position locking mechanism 12 and the storage position locking mechanism 13 with an offset OS from the center position C in the width direction of the seat 1, as shown in FIG. The seating position striker 10 and the storage position striker 11 are provided with an offset OS from the center position C in the width direction of the seat 1, but in this embodiment, the seating position striker 10 and the storage position striker 11 are provided. Are provided at a central position C in the width direction of the sheet 1.
[0029]
On the other hand, as shown in FIG. 1B, the seating position striker 10 (R) is engaged from the forward movement direction at a substantially central position C in the width direction of the lower surface front portion of the cushion frame 3A of the seat cushion 3. Then, the cushion frame 3A is locked to the seating position U, and the seating / storing position lock for locking the cushion frame 3A to the storage position D by engaging with the storage position striker 11 (R) from the downward movement direction. A mechanism 20 is provided.
[0030]
The seating / storage position locking mechanism 20 is fixed to the vertical wall portion 21a of the L-shaped bracket 21 fixed to the cushion frame 3A by two screws 22.
[0031]
As shown in FIG. 3, the seating / storing position locking mechanism 20 is provided with a pair of left and right brackets 23A, 23B, and the brackets 23A, 23B are integrally fixed by welding or the like with a predetermined gap therebetween. Each bracket 23A, 23B is formed with a screw insertion hole 23a through which the screw 22 is inserted.
[0032]
A rubber 24 and a lock plate 25 are interposed in a gap formed between the vertical wall portions 23d and 23e of the brackets 23A and 23B, and the rubber 24 is held by the bracket 23B. The locking plate 25 between the bracket 24A and the bracket 23A is rotated on a vertical surface by a caulking pin 26 that is caulked through the holes 23b, 25a, 24a, and 23c of the bracket 23A, the locking plate 25, the rubber 24, and the bracket 23B. Supported as possible.
[0033]
A wire spring 27 is wound around the caulking pin 26, and the wire spring 27 is hooked between the bracket 23A and the lock plate 25 to urge the lock plate 25 in the unlocking direction A.
[0034]
A lock lever 30 is disposed on the lower surface of the horizontal wall portion 23f of the bracket 23B, as indicated by an arrow g, and the lock lever 30 is pivoted to a caulking pin 32 passing through the through hole 23g of the horizontal wall portion 23f. As the center hole 30a is caulked, the lock lever 30 is rotatably supported on a horizontal plane.
[0035]
A wire spring 31 is wound around the caulking pin 32, and the wire spring 31 is hooked between the bracket 23B and the pin 29 caulked in the caulking hole 30b of the lock lever 30 so that the lock lever 30 is moved. Energized in the locking direction B.
[0036]
As shown in FIG. 4B, the lock plate 25 is held in the unlock position (see solid line a) while being urged in the unlock direction A by the wire spring 27 when unlocked. The plate 25 engages with the seating position striker 10 in the forward movement direction E during the forward movement, and locks and rotates the lock plate 25 (see the two-dot chain line b). A storage position lock groove 25c is formed to engage the storage position striker 11 from the downward movement direction F to lock the lock plate 25 (see the two-dot chain line c).
[0037]
When the lock plate 25 is locked to the seating position (see the two-dot chain line b) or the storage position (see the two-dot chain line c), the protrusion 25d gets over the lock lever 30 so that the lock lever 30 Then, it comes to be locked at the locked position.
[0038]
The pin 29 of the lock lever 30 and the reclining mechanism 6 are connected to an operation lever 15 provided on the back surface of the seat back 4 via cables 34 and 14 c, respectively, and simultaneously with the operation of the operation lever 15. Unlock operation is started.
[0039]
The operation of the locking device for the seat 1 configured as described above will be described.
[0040]
When the seat 1 is in the seating position U shown in FIG. 6 (a), the lock plate 25 of the seating / storage position locking mechanism 20 is as shown in FIGS. 2 (a) and 5 (a). The seating position lock groove 25b engages with the seating position striker 10 and is rotated and locked by the lock lever 30, whereby the seat 1 is locked at the seating position U.
[0041]
When the operation lever 15 is operated at the seating position U, the seating / storage position locking mechanism 20 and the reclining mechanism 6 are simultaneously unlocked, and when the locking of the lock plate 25 by the lock lever 30 is released, the locking is performed. The plate 25 is rotated to the unlock position by the urging force of the wire spring 27.
[0042]
As the lock plate 25 rotates, the seat cushion 3 is moved rearward by the rearward movement torsion bar 8, and the seatback 4 is moved forward by the forward movement spring.
[0043]
Thereafter, when the seat 1 is pressed down by hand, as shown in FIGS. 2B and 5B, the seat 1 is moved down, and the lock plate 25 of the seating / storage position locking mechanism 20 is moved. The storage position lock groove 25c is engaged with the storage position striker 11 in the downward movement direction F, is locked and rotated, and is locked by the lock lever 30 so that the seat 1 is locked at the storage position D. become.
[0044]
On the other hand, when the operation lever 15 is operated in the storage position D, the seating / storage position locking mechanism 20 and the reclining mechanism 6 are simultaneously unlocked (the unlocking operation of the reclining mechanism 6 is swung), thereby locking. When the locking of the lock plate 25 by the lever 30 is released, the lock plate 25 is rotated to the unlock position by the urging force of the wire spring 27.
[0045]
With the rotation of the lock plate 25, the seat 1 is moved up by the upward movement torsion bar 9, and then the seat 1 is moved forward by pushing the seat 1 forward by hand. 5A, the seating position lock groove 25b of the lock plate 25 of the seating / storage position locking mechanism 20 engages the seating position striker 10 from the forward movement direction E, and the lock is rotated. Thus, the seat 1 is locked at the seating position U by being locked by the lock lever 30.
[0046]
Thereafter, the seat back 4 is raised to the standing position by hand, and the reclining mechanism 6 is operated to adjust the forward / backward tilt position.
[0047]
In the case of the locking device for the seat 1, only one seating / storage position locking mechanism 20 is attached to the seat cushion 3, and the seating position locking groove 25b and the storage position locking mechanism 25 are formed on the lock plate 25 of the locking mechanism 20. When the seat cushion 3 is moved forward while forming the lock groove 25c, the seat position lock groove 25b of the lock plate 25 engages with the seat position striker 10 from the forward movement direction, and the seat cushion 3 Is locked at the seating position U, and when the seat cushion 3 moves downward while moving backward, the storage position lock groove 25c of the lock plate 25 engages with the storage position striker 11 from the downward movement direction, and the seat cushion 3 is moved. It locks to the storage position D.
[0048]
As a result, since it is sufficient to provide only the seat cushion 3 one of the seating-storage position for the lock mechanism 20, it is possible to achieve weight loss is to cost depreciation.
[0049]
Further, since the single seating / storage position locking mechanism 20 and the strikers 10 and 11 are provided at substantially the center position in the width direction of the seat 1, the seat 1 is difficult to tilt in the width direction, particularly in the storage position U. A step does not occur in the left and right sheets 1 and the appearance is improved.
[Brief description of the drawings]
FIG. 1 is a seat lock device according to the present invention, in which (a) is a perspective view showing an arrangement of strikers, and (b) is a perspective view showing an arrangement of lock mechanisms.
FIGS. 2A and 2B show a relationship between a position of a cushion frame and lock rotation of a lock plate, wherein FIG. 2A is a side view of a seating position, and FIG. 2B is a side view of a storage position;
FIG. 3 is an exploded perspective view of a seating / storing position locking mechanism.
4A is a plan view of a lock lever, and FIG. 4B is a front view of a lock plate.
FIGS. 5A and 5B are enlarged views of main parts of FIGS. 2A and 2B, respectively.
6A is a perspective view of a seating position, FIG. 6B is a perspective view of an intermediate position, and FIG. 6C is a perspective view of a storage position;
7A and 7B are a cushion frame and a back frame, wherein FIG. 7A is a perspective view of a seating position, FIG. 7B is a perspective view of an intermediate position, and FIG. 7C is a perspective view of a storage position.
FIGS. 8A and 8B show a relationship between the position of a conventional cushion frame and lock rotation of a lock plate, where FIG. 8A is a side view of a seating position and FIG. 8B is a side view of a storage position;
9A and 9B are a conventional seat lock device, in which FIG. 9A is a perspective view showing an arrangement of strikers, and FIG. 9B is a perspective view showing an arrangement of lock mechanisms.
10A is a plan view of the lock lever, FIG. 10B is a front view of the lock plate of the seating position lock mechanism, and FIG. 10C is a front view of the lock plate of the storage position lock mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rear seat 2 Floor 2a Storage recessed part 2b Upper vertical wall part 3 Seat cushion 3A Cushion frame 4 Seat back 4A Back frame 6 Reclining mechanism 7 Link mechanism 10 Seating position striker (horizontal position striker)
11 Strike for storage position (Strike for vertical position)
15 Control lever 20 Seat / storage position lock mechanism 25 Lock plate 25b Seat position lock groove (horizontal position lock groove)
25c Lock groove for storage position (lock groove for vertical position)
30 Lock lever U Seating position D Storage position E Forward movement direction F Downward movement direction C Center position

Claims (2)

The seat cushion (3) has a link mechanism (7) provided on the bottom wall (2c) of the floor (2) so that the cushion frame (3A) moves upward while moving forward and moves downward while moving backward. ) in the support,
The seat cushion (3) in mounted seating, storage position lock mechanism (20) is a floor (2) the seat cushion to the striker for seating position of the upper (10) engages from Maedo direction (3) While locked to the seating position (U) ,
The seat cushion (3) is configured to be locked in the storage position (D) by engaging with the storage position striker (11) provided on the bottom wall (2c) of the floor (2) from the downward movement direction .
The seating & accommodated position lock mechanism (20) is mounted one on the seat cushion (3), on one of the lock plate of the seat-storage position lock mechanism (20) (25), for seating position striker and engages (10) with the lock plate (25) to lock rotation is thereby seated position for locking groove (25b), engaged with the striker for storage position (11) engaged with the lock plate (25) to lock rotation A seat cushion locking device having a storage position locking groove (25c) to be formed. The lock mechanism (20) and the striker (10), (11) and is substantially billing is provided at the center position claim 1 Symbol placement of the seat cushion of the locking device in the width direction of the sheet.

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