JPS6242830Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle seat, and more particularly to a locking device for a seat in which a seat back is movable from one side of the seat cushion to the opposite side via a parallel link.

Embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 4. Reference numeral 1 denotes a seat pedestal fixed to a floor 2 via bolts 3, and the pedestal connects a frame 4 having a U-shaped cross section into a rectangular shape, and has stays 5 erected at each corner, and a seat 5 between the lower ends of the stays. are connected by a pipe 6.
Incidentally, reference numeral 7 indicates a bracket which is fixed at both ends to the frame 4 and the pipe 6 in order to mount an auxiliary seat (not shown). A seat cushion 8 is arranged on the pedestal 1, and one side 9 of the seat cushion 8 is disposed on the pedestal 1.
Brackets 12 are fixed to the frame 11 of the seat cushion 8 at substantially the center of the seat cushion 8 and the other side 10 opposite to the seat cushion 8 on the same side, and the left and right brackets 12 have the same axis. A nut 13 is fixed to each. Further, a bracket 15 having a through hole 14 corresponding to the bracket 12 is fixed to the pedestal 1, and a bush 16 with a flange is fitted into the through hole, and a spring washer is inserted through the bush. The seat cushion 8 is pivotally supported on the base 1 by screwing a bolt 18 with a bolt 17 into the nut 13. On the other hand, a reclining device 21 known per se is fixed to both sides of the lower end of the seat back 20 via bolts 22, and one end of a first link 25 and a second link 26 constituting a parallel link 24 are connected to a stepped pin 27 at the lower end of the reclining device. The bolts 3 are connected to a reinforcing member 28 fixed to the frame 4 of the pedestal 1 so as to form a closed cross section, and a pipe 29 fixed to the frame 4 passing through the side surface of the frame 4 and the bracket 7.
The parallel link 24 is connected to the first bracket fixed to the frame 4 in FIG. The position shown by the solid line where the second link 26 comes into contact with the upper surface 35 of 34 and the first link 2
5 is a second bracket 36 fixed to the frame 4.
It is configured to be able to move to the position shown by the two-dot chain line, where it comes into contact with the upper surface 37 of the. Further, a flange 38 bent toward the seat cushion 8 side is formed at the lower end of the reclining device 21, and the flange presses against the stopper brackets 39, 40 fixed to the frame 11 of the seat cushion 8. 11 are configured to abut against cushioning materials 41 provided on the upper surface of each corner of the frame 4. The seat bag 20 is fixed by a first lock device 42 pivotally supported by the first bracket 34 or a second lock device 43 pivotally supported by the second bracket 36.
2 and the second locking device 43 have the same configuration, the first locking device 42 will be explained below, and the second locking device 43 will be given the same reference numerals and the explanation thereof will be omitted. The first lock device 42 is composed of a hook 44 formed at the upper end, a pedal 45 formed integrally with the hook at the lower end, and a shaft 46 fixed to the middle part, and the shaft 46 is connected to the first bracket device. A first locking device is rotatably supported at both ends around an axis by a bearing plate 47 whose upper end is fixed to the lower surface of the frame 4 and a bearing bracket 48 whose upper end is fixed to the lower end of the frame 4, and is supported by a coil spring (not shown). is biased to rotate counterclockwise in FIG. Furthermore, axis 4
The distal end of the arm 50 is formed to have an oval shape in cross section, and a screw 49 is engraved on the outer circumferential surface, and the intermediate portion of the arm 50 is inserted into the oval shaped portion through a plain washer 51 and a spring washer 52, and a nut 53 is screwed into the screw 49. It is fixed by being screwed together. A pin 54 is fixed to the upper end of the arm 50, and the pin is slidably engaged with a long hole 55a provided at the tip of a lever 55, and the lever 55 is attached to a bracket 56 fixed to the frame 4 around its own axis. It is fixed to one end of a rod 57 which is rotatably supported at both ends. The other end of the rod 57 is also connected to a locking device having the same structure as the first locking device 42 via a lever and arm (not shown), but the locking device (not shown) does not need to be provided with a pedal. Further, the lower end of the arm 50 on the first locking device 42 side is connected to a pin 54 on the second locking device 43 side, and a pin 54 on the first locking device 42 side.
are connected to the lower end of the arm 50 on the second lock device 43 side by wires 58 and 59, which are connection members, respectively. Further, the first link 25 and the second link 26 are provided with lock pins 60 and 61, which are a second protrusion and a first protrusion, respectively.
0 has the hook 44 of the second locking device 43, and the locking pin 61 has the hook 44 of the first locking device 42.
4 are configured to lock, respectively.

Next, the first locking device 42 and the second locking device 4
The operation of this embodiment will be explained focusing on the operation No. 3. First, when the seat bag 20 is in the solid line position in FIG. By blocking, the reclining device 21 and the seat bag 20 are locked in position 9 on one side of the seat cushion 8. At this time, the seat cushion 8 is
Stopper bracket 39 provided on one side 9
is pressed downward by the flange 38 of the reclining device 21, so that one side 9 is clamped and fixed between the seat base 1 and the reclining device 21. That is, the seat cushion 8 is
8 (see Figure 3) as a fulcrum, one side 9 swings downward, that is, the upper surface of the seat cushion 8 forms an inclined surface that becomes higher as it goes from one side 9 toward the other side 10. Locked. In this way, the first
The locking device 42 locks the movement of the seat bag 20 in the other side 10 direction by blocking the movement of the second link 26, and also locks the movement of the seat bag 20 in the other side 10 direction.
It also has the function of locking the rocking movement. Next, a description will be given of the operation when the first locking device 42 described above is unlocked, the seat bag 20 is moved from one side 9 of the seat cushion 8 to the other side 10, and the seating direction of the seat is reversed.

First, either directly press the pedal 45 of the first locking device 42 to rotate the locking device clockwise against the biasing force of a coil spring (not shown), or press the pedal 45 of the second locking device 43 to rotate the locking device clockwise against the urging force of a coil spring (not shown). By rotating the locking device counterclockwise against the biasing force and rotating the arm 50 of the first locking device 42 clockwise via the arm 50 of the second locking device 43 and the wire 58, the first locking device is locked. The device 42 is rotated clockwise to release the lock between the hook 44 and the lock pin 61, and the seat bag 20 is pushed and moved in the direction of the two-dot chain line position. At this time, the flange 38 of the reclining device 21 presses the stopper bracket 40 to rotate the seat cushion 8 counterclockwise, thereby swinging the seat cushion to the position indicated by the two-dot chain line. In other words, the seat cushion 8 is
The upper surface thereof is swung to form an inclined surface that becomes higher toward the one side 9 direction than the other side 10. When the foot is released from the pedal 45 after the seat bag 20 has moved to the two-dot chain line position, the second lock device 43 rotates clockwise due to the biasing force of a coil spring (not shown), and the hook 44 and the lock pin 60 are locked, and the seat bag 20 is locked. is fixed at the position indicated by the two-dot chain line. Similarly to the first locking device 42 described above, the second locking device 43 locks the movement of the seat bag 20 in nine directions on one side by blocking the movement of the first link 25, and also locks the movement of the seat bag 20 in nine directions on one side.
locks the swing of the

Conversely, when moving the seat back 20 from the two-dot chain line position to the solid line position, the seat back 20 is moved after stepping on the pedal 45 of the first locking device 42 or the second locking device 43 to release the engagement between the hook 44 and the lock pin 60. When the seat back is pressed in the direction of the solid line position and the foot is released from the pedal 45 when the seat bag reaches the solid line position, the hook 44 and the lock pin 61 are released.
are locked, and the seat bag 20 is fixed at the solid line position.

As explained above, the seat cushion 8 swingably supported on the seat pedestal 1 has one side 9 or the other side 10 connected to the reclining device 21.
By pressing and holding the seat back 20 through the seat back 20, it is fixed at a predetermined inclination angle, so even if the seat back 20 is reversed and moved, the side opposite to the position where the seat back 20 is fixed, that is, the front part of the seating surface, is always high. The seat is held in an inclined position, providing a good seating feeling.

According to the above embodiment, the first locking device 42 and the second locking device fix or release the seat bag 20.
Since the locking device 43 is connected by wires 58 and 59 so that the first locking device and the second locking device are interlocked, the pedal of either the first locking device 42 or the second locking device 43 cannot be operated. 45, the seat back 20 can be fixed or moved to one side 9 and the other side 10 of the seat cushion 8, and, for example, by depressing the pedal 45 of the first locking device 42,
When the hook 44 of the lock device 42 and the lock pin 61 are disengaged and the seat bag 20 is moved to the other side 10 of the seat cushion 8, the hook 44 of the second lock device 43 and the lock pin 60 do not collide. Alternatively, the lock pin 60 can be prevented from being damaged. Further, according to this embodiment, the seat cushion 8 pivotably supported on the seat base 1 is attached to the seat back 20.
The seat bag 20 is configured to be held under pressure by the seat cushion 8, and the seat bag 20 is fixed to one side 9 or the other side 10 of the seat cushion 8 by a first locking device 42 or a second locking device 43 provided on the seat base 1. Since both locking devices 4
If the seat bag 8 is fixed with either 2 or 43, the seat cushion 8 is fixed via the seat bag 20, so the two members, the seat bag 20 and the seat cushion 8, can be fixed at the same time with one locking means. This allows the structure to be simplified and contributes to cost reduction.

Furthermore, according to this embodiment, the first locking device 4
2 or the pedal 45 of the second locking device 43 to release the fixation of the seatback 20, the fixation of the seatback 20 and the seat cushion 8 will be released at the same time, and in this state, the seatback 20 can be pushed to reverse the seating direction. When the seat cushion 8 moves, the seat cushion 8 is driven to swing as the seat back 20 moves, and its inclination is changed.
It is said that it is possible to provide an extremely easy-to-operate reversing seat in which the seating direction of the seat can be reversed by simultaneously moving two members, the seat back 20 and the seat cushion 8, with a simple operation of pressing . be effective.

Next, the first locking device 42 and the second locking device 43
A fifth modification of the above embodiment regarding the connection structure with
This will be explained in detail based on the figures and FIG. In addition,
The same parts as those in the above embodiment are given the same reference numerals, and explanations thereof will be omitted. In this modification, the connecting member is constructed of a link 65, a lever 66, and a link 67 instead of the wires 58 and 59 of the above embodiment. One end of the link 65 is pivotally supported on the pin 54 of the arm 68 on the second lock device 43 side, and the other end is pivotally supported on the upper end of the lever 66 via a rivet 69. Further, one end of the link 67 is pivotally supported to the lower end of the lever 66 via a rivet 70, and the other end is pivotally supported to the pin 54 of the arm 68 on the first locking device 42 side. A pipe 71 is located in the middle of the lever 66.
is fixed, and the pipe is fitted onto a pin 72 fixed to the reinforcing member 28, and the lever 66 is rotatably supported around the pin 72. In addition, arm 68
The lower end of the arm 50 extending downward to connect the wires 58 and 59 is simply cut off, and the arms 68 and 50 are otherwise exactly the same.

It is clear that the above modification also provides substantially the same effects as the embodiment. In the above embodiments and modifications, the seat cushion 8 is pivotally supported on the base 1, but it can also be applied to a case where it is fixed to the base 1. In this case, the other end of the parallel link 24 is attached to the seat cushion 8. It may be attached to Further, the lock pins 60, 61 may be provided on the reclining device 21 or the seat back 20.

[Brief explanation of the drawing]

Figure 1 is a side view of an embodiment of the present invention;
The figure is an enlarged sectional view taken along the line of Fig. 1, Fig. 3 is an enlarged sectional view taken along the line of Fig. 1, and Fig. 4 is an enlarged sectional view taken along the line of Fig. 1.
FIG. 5 is a side view corresponding to FIG. 1 in a modification of the present invention, and FIG. 6 is a view taken along the line in FIG. 1: Pedestal, 2: Floor, 4: Frame, 8: Seat cushion, 9: One side, 10: Other side, 11:
Frame, 20: Seat back, 24: Parallel link, 25: First link, 26: Second link, 4
2: First locking device, 43: Second locking device, 4
4: Hook, 45: Pedal, 50: Arm, 5
4: Pin, 58, 59: Wire, 60, 61: Lock pin, 65: Link, 66: Lever, 67:
Link.

Claims (1)

[Scope of utility model registration request] A seat base provided on the floor of the vehicle, a seat cushion pivotably supported on the seat base, and one side of the seat cushion that can be moved to the other side opposite to the same side. a seat back which is supported by the seat pedestal through a parallel link and which contacts the seat cushion to drive the seat cushion to swing and press and hold the seat cushion at a predetermined swing position; It engages with a first protrusion that is pivotally supported by the seat pedestal below and is provided on the parallel link to fix the seat bag at a position on one side of the seat cushion and release the engagement with the first protrusion. a first locking device having a pedal that engages with a second protrusion provided on the parallel link that is pivotally supported on the seat pedestal below the other side of the seat cushion to lock the seat back against the seat cushion; a second lock device having a pedal that is fixed at the other side position and released from engagement with the second protrusion;
A locking device for a vehicle seat, comprising a connecting member that connects a pedal of the locking device and a pedal of the first locking device to interlock the two locking devices.