JP4474600B2 - Foldable car seat - Google Patents

Description

  The present invention relates to a foldable and retractable vehicle seat that can be folded and stored together by folding a seat cushion and a seat back so as to secure an interior space, and the entire seat can be reversed and stored.

Conventionally, when a third seat for an automobile is exemplified, the seat cushion and the seat back are folded since the rear side of the seat cushion is mounted on the base bracket installed on the vehicle body floor in order to secure a luggage space in the rear portion of the vehicle. Are known, and the entire seat is reversed backward from the base bracket and stored in a recess in the vehicle body floor (Patent Document 1).
JP-A-11-310068

  The above-described folding storage type automobile seat includes a striker standing on the floor surface of the vehicle body floor and a seat leg that can be attached and detached with a striker lock, and the front side of the seat cushion is the seat leg with the seat leg. It is planned to be configured to support on the surface.

  When the seat leg is provided, the upper end of the seat leg is mounted to the front of the bottom of the seat cushion, so when folding the seat cushion, the seat leg removed with the striker lock from the vehicle floor is brought down to the bottom side of the seat cushion. And the seat cushion, the seat back, and the seat as a whole.

  However, if the seat leg is simply provided so as to be folded down to the bottom side of the seat cushion, it takes time and effort to collapse the seat leg as well as folding the seat cushion. Further, when the seat cushion is returned, the seat leg must be raised from the bottom side of the seat cushion, and this is also troublesome.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a folding storage type automobile seat configured to be able to be linked to one motion by a simple mechanism of folding and raising a seat leg and folding the seat cushion and returning the entire seat. To

The invention according to claim 1 of the present application includes a striker on the vehicle body side and a seat leg that can be attached and detached with a striker lock so that the seat leg can be folded down to the bottom side of the seat cushion. Installed and supported on the floor surface, the rear side of the seat cushion is mounted on the base bracket installed on the floor surface of the vehicle body floor,
For automobiles that can be stowed by folding the seat leg removed from the striker on the vehicle body to the bottom side of the seat cushion, folding the seat cushion and seat back together and flipping the entire seat backward from the base bracket A sheet,
Linked with the seat cushion folding action, the seat leg is tilted to the bottom side of the seat cushion, and the whole seat is retracted, and the link mechanism that raises the seat leg from the bottom side of the seat cushion is based on the seat leg and base. Assembled between the bracket and
The link mechanism is
It has a pivot plate which is rotatable along the bottom surface of the seat cushion, and a main driving rod connected with the support shaft and said base bracket and one end of said pivot plate corresponding to the width direction of the seat cushion A main drive side member ;
A swing bar which is rotatable along the bottom surface of the seat cushion is disposed in front side of the pivot plate, a driven rod which is linked with the support shaft and the seat leg and the rocking bar, the A driven side member having ,
The main driving side member and the driven side member are connected , one end side is connected to the other end portion of the swivel plate corresponding to the width direction of the seat cushion by a support shaft, and the other end side is connected to the middle side of the swing bar. and characterized in that it comprises a and a bridging bar connected with the support shaft.

The invention according to claim 2 of the present application is provided with a guide pin protruding from the swing bar in addition to the configuration of the invention according to claim 1, and has an arc shape concentric with the rotation center of the swing bar. The long hole is provided on the bottom surface of the seat cushion, and the guide pin is inserted and disposed in the long hole .

In the folding storage type automotive seat according to claim 1 of the present application, a revolving plate provided rotatably along the bottom surface of the seat cushion, one end of the revolving plate corresponding to the width direction of the seat cushion, and a base bracket And a main drive side member having a main drive rod connecting the
A driven-side member having a swing bar disposed on the front side of the swivel plate and rotatably provided along the bottom surface of the seat cushion, and a driven rod for connecting the swing bar and the seat leg with a support shaft. And
The main drive side member and the driven side member are connected , one end side is connected to the other end portion of the swivel plate corresponding to the width direction of the seat cushion by a support shaft, and the other end side is connected to the middle side of the swing bar by a support shaft. and bridging bars, the link mechanism comprising since only assembled between the seat leg and the base bracket, leaning of the seat leg can be configured to be in conjunction with the one-motion of standing Tsukedashi a simple mechanism.

The folding storage type automotive seat according to claim 2 of the present application is provided with a guide pin protruding from the swing bar, and an arc-shaped long hole that is concentric with the center of rotation of the swing bar. The link mechanism can be configured to operate stably along the bottom surface of the seat cushion by providing the guide pin and placing the guide pin in the elongated hole .

  The illustrated embodiment is applied to construct a rear seat for an automobile. The rear seat has a seat body assembled from a seat cushion 1, a seat back 2, a headrest 3, and a seat leg 4, as shown in FIG. In this rear seat, the seat leg 4 is folded down to the bottom side of the seat cushion 1, the seat cushion 1 and the seat back 2 are folded and combined into one, and the entire seat is inverted backwards to reverse the recess R of the vehicle body floor F. It is comprised so that it may house.

  As shown in FIG. 2, the seat cushion 1 extends between the left and right sides of the main frame 1a having a substantially U shape extending from the front side to the left and right sides, the rear frame 1b extending between the rear ends of the main frame 1a, and the main frame 1a. It is assembled with a base frame made up of two cross members 1c and 1d.

  The seat cushion 1 is installed and supported on the floor surface of the vehicle body floor F by a seat leg 4 on the front side. The seat leg 4 is assembled by fixing the front plate 4b to the main body frame 4a with the main body frame 4a made of a pipe member bent in a substantially U shape as a base. The main body frame 4a is mounted so that the upper end side of both shafts is mounted on bearing brackets 1e and 1f fixed to the cross member 1c by supporting shafts 4c and 4d so that the seat cushion 1 extends in the width direction in front of the bottom side. ing.

  The seat leg 4 is provided with a striker S erected on the floor surface of the vehicle body floor F and detachable striker locks 5a and 5b on the lower end side of the front plate 4b. The seat leg 4 is assembled with a resin exterior cover 4e (see FIG. 1) that covers the main body frame 4a and the front plate 4b.

  The seat cushion 1 is installed by being mounted and supported by a base bracket 6 (see FIG. 1) whose front side is installed and supported by a seat leg 4 and whose rear side is fixed to the floor surface of the vehicle body floor F. . A bearing bracket 1g protruding from the rear frame 1b of the cushion frame is connected to the base bracket 6 by a support shaft 1h. With this support shaft 1h as a fulcrum, the entire seat is attached so as to be able to be reversed backward.

  The reclining mechanism 7 is assembled because it is interposed between the side bracket 1 i rising from the rear side of the seat cushion 1 and the side bracket (not shown) of the seat back 2. The reclining mechanism 7 is provided so as to lock the seat back 2 so as to hold the seat back 2 and to unlock the seat back 2 so that the angle of the seat back 2 can be adjusted or folded.

  Along with the reclining mechanism 7, a spiral spring 8 (see FIG. 1) is stretched between the side bracket 1 i of the seat cushion 1 and the side bracket of the seat back 2. The spiral spring 8 is provided as a spring biasing so that the seat cushion 1 and the seat back 2 are attracted in the folding direction.

The seat back 2 is provided with an operation lever 9 for unlocking the striker locks 5a and 5b and a tension strap 10 for unlocking the reclining mechanism on the back side (see FIG. 1) . The operation lever 9 is provided as one for pulling the lock jaws (not shown) of the striker locks 5a and 5b for holding the striker S with a wire cable to remove it from the striker S. The tension strap 10 is provided as an element that unlocks the reclining mechanism by rotating an operating cam (not shown) mounted on the operating shaft of the reclining mechanism 7 with a wire cable.

  The seat leg 4 is connected to the base bracket 6 via the link mechanism 11. The link mechanism 11 is interlocked with the folding of the seat cushion 1, the seat leg 4 removed from the striker lock S of the vehicle body floor F is brought down to the bottom side of the seat cushion 1, and is interlocked with the return of the seat cushion 1, The seat leg 4 is provided so as to stand up from the bottom side of the seat cushion 1.

The link mechanism 11 is assembled between a base plate 12a and a cover plate 12b that are attached to the rear side of the cushion frame (see FIG. 2). As shown in FIG. 3, the link mechanism 11 stands and holds the support shaft 11a so as to be rotatable between the plate surfaces of the base plate 12a and the cover plate 12b, and the swivel plate 11b across the width direction of the seat cushion 1 in the longitudinal direction. It is assembled from the support shaft 11a and the turning plate 11b as starting points by being fitted and fixed on the axis of the support shaft 11a at substantially the middle side.

  The revolving plate 11b is connected to the base bracket 6 at the outer end located near the side portion of the seat cushion 1 through the main driving rod 11c. The main drive rod 11c is connected to one end portion of the turning plate 11b by a pivot 110 and the other end side is connected to the base bracket 6 by a pivot 111 (see FIG. 1) so that the entire seat can be reversed and reversed. ing. The main drive rod 11c is formed to have a length that allows the swivel plate 11b to be pushed forward by a predetermined stroke and rotated backward as the entire seat is reversed and reversed.

On a plate surface of the base plate 12a, the swing bar 11d across the width direction of the seat cushion 1 is provided on the plate surface position spaced forward side of the pivot plate 11b. The swing bar 11d is rotatably supported by a support shaft 112 planted on the plate surface of the base plate 12a at the inner end located closer to the inner side of the seat cushion 1, and is positioned closer to the side portion of the seat cushion 1. A guide pin 113 projecting downward from a plate surface near the outer end is inserted into an arc-shaped long hole 12c provided on the plate surface of the base plate 12a, so that the support shaft 112 is pivotally attached. Yes.

  The swing bar 11d is connected to the seat leg 4 via a driven rod 11e. One end of the driven rod 11e is connected to the end of the swing bar 11d from which the guide pin 113 protrudes by a pivot 114, and the other end is inserted and held by a bearing sleeve 115 attached to the body frame 4a of the seat leg 4. Yes.

On the leg side of the driven rod 11e, a bearing sleeve 115 is attached to a frame 115a as shown in FIG. The stopper rod 115d is attached and assembled to the tip of the rod that is inserted into the bearing sleeve 115. Thereby, the backlash of the link mechanism 11 and an assembly error can be absorbed. Also, striker locking 5a, 5b are before Komu added striker S, the seat leg 4 is set to return to the forwardmost position, can absorb the overstroke associated with the entire back operation sheets, prevent the breakage of the link mechanism 11 .

  The main drive side and the driven side of the link mechanism 11 are connected via a bridging bar 11f (see FIG. 3). The bridging bar 11f has one end connected to the end of the swiveling plate 11b on the side opposite to the connecting side of the main drive rod 11c via the support shaft 11a and a support shaft 116a, and the other end connected to the middle side of the swinging bar 11d. They are connected by a support shaft 116b.

In addition to the above, a substantially L-shaped hand pull pocket 12 whose depth side curves toward the front of the seat cushion 1 is provided at the bottom front center of the seat cushion 1 so as to open downward (FIG. 1). reference). The pull pocket 12 is provided to store the folded seat body in the recess R of the vehicle body floor F and lift it from the recess R of the vehicle body floor F.

  Further, a reduction damper 13 (see FIG. 1) is attached to the link mechanism 11 on the same axis as the support shaft 11a so that the folding operation of the seat cushion 1 and the returning operation of the entire seat are decelerated to an appropriate speed. It has been.

  In the configuration described above, as the striker locks 5a and 5b, as shown in FIG. 5, the lock jaw 50 provided with the holding mouth of the striker S and the lock jaw 50 are locked or released in the holding state of the striker S. An assembly assembled from the cam jaws 51 is provided.

  The locking jaw 50 has an overhanging edge 52, while the cam jaw 51 has a receiving edge 53. The lock jaw 50 is combined with the cam jaw 51 so that the striker S can be inserted or released by engagement or disengagement between the overhang edge 52 and the receiving edge 53.

  The jaws 50 and 51 are mounted on the plate surface of the base frame frame 56 by supporting shafts 54 and 55 that are inserted through the eccentric positions of the plate surface. The support shafts 54 and 55 are swingably attached so that the protruding edge portion 52 of the lock jaw 50 and the receiving edge portion 53 of the cam jaw 51 are engaged or disengaged.

  The lock jaw 50 is combined with the cam jaw 51 so that the coil spring 57a is stretched over the upper sides of the jaws 50 and 51, and the lock jaw 50 is pulled and supported in the holding release direction of the striker S. The cam jaw 51 is tension-supported so as to keep the receiving edge 53 in pressure contact and engagement with the overhanging edge 52 of the lock jaw 50 by a coil spring 57b spanned between the upper side and the cover frame 58.

  A wire cable 14 drawn from the operation lever 9 (see FIG. 1) is connected to the upper side of the cam jaw 51. As the wire cable 14, a cable in which a pulling wire 14a in which fine metal wires are bundled is inserted into a resin cable 14b is used.

  The wire cable 14 is operated by lever operation by connecting the distal end side of the pulling wire 14 a to the upper side of the cam jaw 51 and holding the cable end of the resin cable 14 b by the clamping piece 59 rising from the plate surface of the base frame 56. It is wired so that the tensile force due to the above acts on the cam jaw 51. Each striker lock 5a, 5b is individually connected with a wire cable drawn out from the operation lever 9.

  As an example of the reclining mechanism 7, a known one (Japanese Patent Laid-Open No. 8-253063) as shown in FIG. 6 can be provided. The reclining mechanism 7 includes a fixed housing 70 fixed to the side bracket of the seat cushion and a movable cover 71 fixed to the side bracket of the seat back so as to be opposed to each other. The shaft 72 and the rotary cam 73 fitted and fixed on the axis of the operating shaft 72 are assembled.

  On the inner side of the fixed housing 70, convex bosses 74a, 74b, 75a, 75b, 76a, 76b are provided in left and right pairs. On the outer periphery of the movable cover 71, gear teeth 77 are provided on the inner periphery of the wall. Lock gears 78a to 78c are slidably sandwiched between the bosses 74a, 74b, 75a, 75b, 76a, and 76b.

  The lock gears 78a to 78c are tension supported by a return spring (not shown) so as to always contact the outer peripheral edge of the rotating cam 73. When the lock gears 78 a to 78 c are pushed by the starting edge of the rotating cam 73, the locking gears 78 a to 78 c mesh with the gear teeth 77 of the movable cover 71. The gear teeth 77 are assembled so as to be disengaged.

  Torsion coil springs 79a to 79c are assembled between the rotary cam 73 and the bosses 74a, 74b, 75a, 75b, 76a, 76b. The torsion coil springs 79 a to 79 c spring-bias the rotating cam 73 so that the raised edges of the rotating cam 73 are in contact with the lock gears 78 a to 78 c and the lock gears 78 a to 78 c are kept in mesh with the gear teeth 77 of the movable cover 71. It is assembled as a thing.

  The reclining mechanism 7 is connected to the tension strap 10 by a wire cable (not shown) that connects the operation shaft 72 of the rotating cam 73 and one end of the wire. This wire cable is formed by inserting a pulling wire in which metal wires similar to those described above are bundled into a resin cable, and pulling the operating shaft 72 of the rotating cam 73 against the torsion coil springs 79a to 79c. 10 is wired.

  In the rear seat configured as described above, when the entire seat is reversed from the seating posture and stored in the recess R of the vehicle body floor F, the operator may perform the following operation from around the seat. First, the headrest 3 is pushed down to the upper surface of the seat back 2 and stored. Next, since the operation lever 9 is pulled, the striker locks 5a and 5b are unlocked from the striker S. At the same time, the seat back 2 is slightly moved backward, and the striker locks 5a and 5b are removed from the striker S.

  When the striker locks 5 a and 5 b are disengaged from the striker S, the operator unlocks the reclining mechanism 7 with the pull strap 10. When the reclining mechanism 7 is unlocked, the spiral spring 8 pulls the seat cushion 1 in the folding direction with the seat back 2 as shown in FIG. If the seat cushion 1 is folded by the spiral spring 8 so as to overlap with the seat back 2, the pulling of the strap 10 is released, so that the reclining mechanism 7 may be returned to the original locked state.

  When the operator reverses the seat back 2 substantially in parallel with the folding of the seat body, the main rod 11c connected to the base bracket 6 (see FIG. 1) moves the swivel plate 11b forward as shown in FIG. 7b. Pushing and turning (see arrow A), the turning plate 11b rotates around the support shaft 11a (see arrow B). As the turning plate 11b rotates, the bridging bar 11f is pulled in the direction opposite to the movement of the main driving rod 11c (see arrow C).

  When the bridging bar 11f is pulled in the direction opposite to the operation of the main drive rod 11c, the swinging bar 11d is guided by the guide pin 113 along the elongated hole 12c and swings around the support shaft 112 in the direction approaching the turning plate 11b. Move (see arrow D). Since the driven rod 11e is connected to the distal end side of the swing bar 11d, the driven rod 11e pulls the seat leg 4 (see arrow E), so the seat leg 4 falls to the bottom side of the seat cushion 1. start.

  When the operator advances the entire seat backward, as shown in FIG. 8a, the main driving rod 11c further pushes the turning plate 11b, and the swinging bar 11d is moved closer to the turning plate 11b via the bridging bar 11f. Rocks. As a result, the driven rod 11e is also pulled, so that the seat leg 4 falls to the bottom side of the seat cushion 1 as shown in FIG.

  Finally, as shown in FIG. 9a, the guide pin 113 of the swinging bar 11d reaches near the end of the long hole 12c, and the driven rod 11e completely sinks the seat leg 4 to the bottom side of the seat cushion 1. Pull and move. Until the seat leg 4 falls, the entire seat is reversed and the entire seat can be stored in the recessed portion R of the vehicle body floor F in a reversed state as shown in FIG. 9b.

  In order to take out the entire seat accommodated from the concave portion R of the vehicle body floor F, an operator can place his / her hand on the pull pocket 12 and lift the base bracket 6 from the seat cushion 1 as a fulcrum. At this time, the reclining mechanisms 5a and 5b are in a locked state, and the spiral spring 8 is biased so that the seat cushion 1 and the seat back 2 are attracted to each other, so that the entire seat including the seat leg 4 is integrated. Can be taken out.

  As the entire sheet is reversed, the main driving rod 11c pulls the swiveling plate 11b backward and the driven rod 11e moves so as to push out the seat leg 4, contrary to when the entire sheet is stored. The seat leg 4 can stand up to the bottom side of the seat cushion 1.

  To reverse the entire seat, the seat leg 4 is returned until the seat leg 4 is locked to the striker S with the striker locks 5a and 5b while the seat body is folded, and the seat cushion 1 is locked onto the floor surface of the vehicle body floor F by the locking of the seat leg 4 To install. Finally, since the strap 10 is pulled, the reclining mechanism 7 may be unlocked and the seat back 2 may be operated to be in the sitting posture.

  By such an operation, the entire seat can be stored in the recess R of the vehicle body floor F, so that the seat leg 4 can be folded and stowed in one motion by folding the seat cushion 1 and returning the entire seat. It is interlocked.

  In the above-described embodiment, the seat leg 4 is tilted and stood up in conjunction with the folding operation of the seat cushion 1, the entire seat returning operation and the one motion, and the reclining mechanism 7 is unlocked and locked by the tension strap 10. The link bar that unlocks and locks the reclining mechanism by reciprocating movement is attached to the link mechanism, and the link bar and the reclining mechanism are connected by a wire cable, so that the reclining mechanism 7 is unlocked and locked. The folding operation of the seat cushion 1 and the returning operation of the entire seat can be linked with one motion. It can be configured so that it can be linked with the return operation of the entire game in one motion.

It is a side view which shows the folding storage type vehicle seat which concerns on this invention. It is a top view which shows the cushion frame which comprises the seat cushion of FIG. It is a top view which shows the principal part of the link mechanism with which the cushion frame of FIG. 2 is equipped. It is a side view which shows the driven rod of the link mechanism connected with the seat leg of FIG. It is a front view which shows the internal structure of the striker lock with which the seat leg of FIG. 1 is equipped. It is a sectional side view which shows the internal structure of the reclining mechanism which can be equipped with the sheet | seat of FIG. It is explanatory drawing which shows the sheet | seat of FIG. 1 in a folding initial movement state. It is explanatory drawing which shows the operation state of the link mechanism corresponding to the sheet | seat of FIG. 7a. It is explanatory drawing which shows the operation state further advanced from the link mechanism of FIG. It is explanatory drawing which shows the folding state of the sheet | seat corresponding to the link mechanism of FIG. 7b. It is explanatory drawing which shows the final operation state by the link mechanism of FIG. It is explanatory drawing which shows the sheet | seat of FIG. 1 in the accommodation state.

DESCRIPTION OF SYMBOLS 1 Seat cushion 2 Seat back 4 Seat leg 5a, 5b Striker lock 6 Base bracket 11 Link mechanism
11b swivel plate
11c main drive rod
11d swing bar
11e driven rod
11f bridge bar
12c arc-shaped long hole
113 guide pin F body floor S striker R seat recess

Claims (2)

A seat leg that can be attached and detached with a striker and striker lock on the vehicle body side is provided so that it can be pushed down to the bottom side of the seat cushion, and the front side of the seat cushion is installed and supported on the floor surface of the vehicle body floor with the seat leg, and the seat Attaching the rear side of the cushion to the base bracket installed on the floor of the vehicle floor,
For automobiles that can be stowed by folding the seat leg removed from the striker on the vehicle body to the bottom side of the seat cushion, folding the seat cushion and seat back together and flipping the entire seat backward from the base bracket A sheet,
Linked with the seat cushion folding action, the seat leg is tilted to the bottom side of the seat cushion, and the whole seat is retracted, and the link mechanism that raises the seat leg from the bottom side of the seat cushion is based on the seat leg and base. It is assembled between the bracket,
The link mechanism is
It has a pivot plate which is rotatable along the bottom surface of the seat cushion, and a main driving rod connected with the support shaft and said base bracket and one end of said pivot plate corresponding to the width direction of the seat cushion A main drive side member ;
A swing bar which is rotatable along the bottom surface of the seat cushion is disposed in front side of the pivot plate, a driven rod which is linked with the support shaft and the seat leg and the rocking bar, the A driven side member having ,
The main driving side member and the driven side member are connected , one end side is connected to the other end portion of the swivel plate corresponding to the width direction of the seat cushion by a support shaft, and the other end side is connected to the middle side of the swing bar. A folding storage-type automobile seat comprising a bridge bar connected by a spindle . A guide pin that protrudes from the swing bar is provided , and an arc-shaped slot that is concentric with the center of rotation of the swing bar is provided in the bottom surface of the seat cushion, and the guide pin is inserted into the slot of the slot. The folding storage type automobile seat according to claim 1, wherein the folding storage type automobile seat is arranged .

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