JP4446100B2 - 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 illustrated, the rear side of the seat cushion is mounted on the base bracket installed on the vehicle body floor to secure the rear luggage space, so the seat cushion and the seat back are combined into one. It is known that the sheets are folded and gathered, and the entire seat is inverted backward from the base bracket and stored in a recess in the vehicle body floor (Patent Document 1).
JP-A-11-310068

  In the above-described folding and retractable automobile seat, when the entire seat is inverted backward from the base bracket, the operator removes the front leg lock by the unlocking operation of the floor lock mechanism and the seat back of the reclining mechanism. It can be configured to move forward on the seat cushion by an unlocking operation, and the operator can flip the table backward by holding the entire seat.

  However, this requires two operations of unlocking the floor lock and reclining lock by the operator, and also requires time and effort to carry out the backward movement with the entire seat from the weight surface of the entire seat.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a foldable and retractable vehicle seat that is configured so that the folding of the seat cushion and the seat back can be moved backward and the interlocking operation can be performed by a simple mechanism with the return operation.

  In addition, an object of the present invention is to provide a foldable and retractable automobile seat that is configured so that the entire seat can be moved backward and returned stably.

According to the first aspect of the present invention, the front side of the seat cushion is installed and supported on the floor surface of the vehicle body floor, and the rear side of the seat cushion is mounted on the vehicle body floor so that the seat back can be angle-adjusted or moved forward. A reclining mechanism that locks and holds, and a spiral spring that pulls the seat cushion and seat back in the folding direction when the reclining mechanism is unlocked is assembled between the seat cushion and the seat back, and the front side of the seat cushion is mounted on the vehicle floor. The seat cushion and the seat back are folded and combined into one, and the entire seat is stored in a state where it is inverted backwards from the vehicle body floor.
Hold the rotary support shaft upright on the plate surface of the support plate, fit the axis of the rotary support shaft to the approximate center of the plate surface, and turn the swivel plate toward the seat cushion width direction on the plate surface of the support plate with the rotation support shaft The upper end of the swivel plate is connected to the base bracket by an operating rod, and the swing bar is placed on the support plate at a position near the swivel plate by a support shaft that is inserted into the approximate center of the plate surface. Then, one end of the swing lever and the inner end of the swivel plate are connected with a bridging bar, and the other end of the swing bar is connected to the reclining mechanism with a wire cable.
The seat cushion is equipped with a link mechanism that reciprocates the locking mechanism from locking to unlocking and unlocking from locking to unlocking in conjunction with pushing or rotating the revolving plate by the actuating rod when the entire seat is tilted or returned. It is characterized by.

  According to a second aspect of the present invention, the seat cushion is provided with a link mechanism in which a damper for decelerating and controlling the backward or backward movement of the entire seat is mounted on the same axis of the rotation support shaft.

  In the folding and storing type automobile seat according to claim 1 of the present invention, the revolving and reversing operation of the entire seat pushes or revolves the revolving plate with the operating rod connected to the base bracket, and reclines. Since the mechanism is connected to the mechanism with a wire cable and reciprocated from locking to unlocking, and from unlocking to locking, the seat cushion and seat back can be folded in one motion with a simple mechanism in conjunction with the overall tilting of the seat. To be done. This eliminates the need for the operator to perform the unlocking operation of the reclining mechanism while tilting the entire seat backward from the seat back side, and accurately sets the timing of the backward tilt from the seat back side and the unlocking movement of the reclining mechanism. it can.

  In the folding and storing type automobile seat according to claim 2 of the present invention, the damper for decelerating and controlling the backward movement or returning operation of the entire seat is assembled on the same axis of the rotating support shaft. The operation is decelerated and a stable operation is performed.

  The illustrated embodiment is applied to construct a rear seat for an automobile. As shown in FIG. 1, the rear seat is assembled with a seat body including a seat cushion 1, a seat back 2, and a headrest 3. This rear seat is installed by installing and supporting the front side of the seat cushion 1 on the floor surface of the vehicle body floor F by the seat leg 4 and mounting the rear side of the seat cushion 1 on the base bracket 5.

  The rear seat removes the seat leg 4 from the floor surface of the vehicle body floor F, falls down to the bottom side of the seat cushion 1, folds the seat cushion 1 and the seat back 2 together, and uses the base bracket 5 as a fulcrum. The entire seat is reversed so that it can be stored in the recess R of the vehicle body floor F. A bearing bracket 1a projecting from the rear side of the cushion frame is connected to the base bracket 5 by a support shaft 1b.

  The rear seat is equipped with a reclining mechanism 6 that holds the seat back 2 in a sitting position and that can be foldably locked with the angle adjustment of the seat back 2 or the seat cushion 1. The reclining mechanism 6 is interposed between a side bracket 1c that rises from the rear side of the seat cushion 1 and a side bracket (not shown) of the seat back 2.

  As an example of the reclining mechanism 6, a known one (Japanese Patent Laid-Open No. 8-253063) as shown in FIG. 2 is provided. The reclining mechanism 6 includes a fixed housing 60 fixed to the side bracket of the seat cushion and a movable cover 61 fixed to the side bracket of the seat back, and is supported at the center of both 60 and 61. It is assembled with an operating shaft 62 and a rotating cam 63 fitted and fixed on the axis of the operating shaft 62.

  Inside the fixed housing 60, left and right bosses 64a, 64b, 65a, 65b, 66a, 66b are provided. Gear teeth 67 are provided on the inner periphery of the wall on the outer periphery of the movable cover 61. Lock gears 68a to 68c are slidably sandwiched between the bosses 64a, 64b, 65a, 65b, 66a, 66b. The lock gears 68a to 68c are tensioned and supported by a return spring (not shown) so as to always contact the outer peripheral edge of the rotating cam 63.

  When the lock gears 68a to 68c are pushed by the starting edge of the rotating cam 63, the lock gears 68a to 68c mesh with the gear teeth 67 of the movable cover 61. The gear teeth 67 are assembled so as to be disengaged. The lock gears 68a to 68c are connected to the gear teeth 67 of the movable cover 61 via the rotary force 63 by torsion coil springs 69a to 69c disposed between the rotary cam 63 and the bosses 64a, 64b, 65a, 65b, 66a, 66b. It is urged so as to be kept in a meshing state at all times.

  Along with the reclining mechanism 6, a spiral spring 7 is stretched between the side bracket 1c of the seat cushion 1 and the side bracket of the seat back 2 as a tension means for the seat cushion 1 and the seat back 2 (see FIG. 1). ). The spiral spring 7 is provided as a spring biasing so that the seat cushion 1 and the seat back 2 are attracted in the folding direction. In addition, a striker lock 8 (see FIG. 1) that can be attached and detached from the striker S of the vehicle body floor F is provided on the lower end side of the seat leg 4.

  As shown in FIG. 3, the seat cushion 1 extends between the main frame 1d having a substantially U shape extending from the front side to the left and right sides, the rear frame 1e extending between the rear ends of the main frame 1d, and the left and right sides of the main frame 1d. It is assembled with a base frame consisting of two cross members 1f and 1g. In this configuration, the side bracket 1c rises upward from the rear side of the main frame 1d, and the bearing bracket 1a is attached so as to protrude obliquely downward from the rear frame 1e (see FIG. 1).

  In the seat cushion 1, a link mechanism 9 for unlocking and locking the reclining mechanism 6 is attached to the cushion frame at one side near the rear portion of the seat cushion 1. The entire mechanism of the link mechanism 9 is assembled between the plates 10a and 10b using a base frame 10a and a cover frame 10b, which are fastened to the main frame 1d, the rear frame 1e, and the cross member 1g, as support frames. .

  As shown in FIG. 4, the link mechanism 9 includes a rotation support shaft 9a that is erected and held between the plate surfaces of the base frame 10a and the cover frame 10b (see FIG. 3), and the plate surface is oriented relative to the support frames 10a and 10b. The rotating plate 9b is assembled starting from a turning plate 9b fitted and fixed on the axis of the rotating support shaft 9a. The swivel plate 9b is arranged so as to face the width direction of the seat cushion 1. .

  The swivel plate 9b is connected to the base bracket 5 (see FIG. 1) of the seat body via an operating rod 9c. Since the operating bracket 9c is located near the side end of the seat cushion 1, the one end of the actuating rod 9c is connected to the vicinity of the rear outer corner of the turning plate 9b. Further, both shaft ends are connected by pivots 90a and 90b (see FIG. 1) so that the entire sheet can be reversed and reversed. The actuating rod 9c is formed to have such a length that the swivel plate 11b is pushed forward by a predetermined stroke and rotated backward by being rotated backward and reversely.

  The revolving interlocking link part which consists of the rocking | swiveling bar 9d and the bridging bar 9e is assembled | attached to the turning plate 9b. The swing bar 9d is disposed from the front side of the seat cushion 1 toward the oblique rear side. The swing bar 9d is pivotally supported by a support shaft 90 having a substantially middle abdominal side planted and fixed between the plate surfaces of the support frames 10a and 10b, and guide pins 91 protruding downward from the plate surface near one end are covered with the cover frame 10b. It is attached so as to be swingable by being inserted into an arc-shaped long hole 10c provided on the plate surface.

  A bridging bar 9e that spans between the swing plate 9b is assembled to the swinging bar 9d. The bridging bar 9e is connected at one end to the front corner of the swivel plate 9b by a support shaft 92a, and at the other end by a support shaft 92b at the end opposite to the side having the guide pin 91 of the swing bar 9d. It is connected.

  The reclining interlocking link portions 9d and 9e are set such that the first swing bar 9d swings with a stroke that is approximately one half of the rotation stroke of the turning plate 9b by the operating rod 9c. As a result, the reclining interlocking link portions 9d and 9e are unlocked and unlocked during each rotation in which the swivel plate 9b is moved by the actuating rod 9c as the whole seat is moved backward or returned. It is assembled to reciprocate with locking.

  The swing bar 9 d is connected to the reclining mechanism 6 via the wire cable 11. In this wire cable 11, the leading end side of the pulling wire 11a is connected to the end portion side of the first swing bar 9d from which the guide pin 91 protrudes, and the cable end of the resin cable 11b is clamped to rise from the plate surface of the cover frame 10b. Since it is held by the piece 93, it is pulled out toward the reclining mechanism 6.

  As shown in FIG. 5, the wire cable 11 has a pulling wire 11 a connected to a projecting piece 12 fitted coaxially with an operating shaft 62 of the reclining mechanism 6, and a resin cable 11 b is attached to the side bracket 2 a of the seat back 2. Since it is held by the actuating lever 13a, it is wired so as to be connected to the reclining mechanism 6.

  By pulling the wire cable 11, the operating shaft 62 of the reclining mechanism (see FIG. 2) rotates, the sunk edge of the rotating cam 63 is positioned relative to the lock gears 67 a to 67 c, and the lock gears 68 a to 68 c are connected to the movable cover 61. Since the gear teeth 67 are disengaged, the reclining mechanism 6 is unlocked. On the other hand, when the tension of the wire cable 11 is released, the reclining mechanism 6 is returned by the torsion coil springs 69a to 69c, so that the reclining mechanism 6 is locked.

  The actuating lever 13a of the reclining mechanism 6 has a substantially inverted L-shape, and is provided with a tension strap 13b at the lower part of the vertical arm. The seat back 2 is mainly operated by a seated person to adjust the angle of the seat back 2. It is equipped on the side of the.

  The operation lever 13a is pivotally supported by a support shaft 2b planted on the side bracket 2a, and the operation lever 13a is returned to the spring by spanning the torsion coil spring 13c between the support shaft 2b and the upper edge of the lateral arm portion. It is attached. Further, since the lateral arm portion of the operation lever 13a comes into contact with the stopper pin 2c projecting from the side bracket 2a of the seat back 2, it is attached so as to regulate the return position.

  In the link mechanism 9 described above, the damper 14 is assembled to decelerate the reverse or return operation of the entire seat (see FIG. 3). When the reclining mechanism 6 is unlocked while the entire seat is moved backward, the deceleration damper 14 is biased so that the spiral spring 7 (see FIG. 1) pulls the seat cushion 1 toward the seat back 2. 7, the movement of the seat cushion 1 is decelerated, and it is assembled so as to decelerate moving the entire seat forward.

  As shown in FIGS. 6 and 7, the damper 14 is assembled on the same axis as the rotation support shaft 9a protruding from the cover frame 10b of the link mechanism. The damper 14 includes a cap body 14a formed integrally from a dome portion 140 and an overhanging flange portion 141 protruding to the side of the dome portion 140, and a bottom plate screwed to the dome portion 140 of the cap body 14a from the lower side. It is assembled from a body 14b and a disk body 14c sandwiched and held between the cap body 14a and the bottom plate body 14b.

  The cap body 14a and the bottom plate body 14b are formed of ordinary synthetic resin by providing concentric circular grooves 143 and 144 on the inner surface side. The disc body 14c includes a boss portion 145 into which the knurled shaft of the rotation support shaft 9a is fitted, a shelf plate portion 146 that protrudes from the middle abdominal side of the boss portion 145, and a cap plate 14a and a bottom plate that rise from the shelf plate portion 146. The circular groove 143,144 of the body 14b is provided with concentric fin portions 147, 148 that closely fit with each other, and is formed of a synthetic resin having slipperiness.

  The damper 14 is assembled with viscous oil (not shown) interposed between the circular grooves 143 and 144 of the bottom plate body 14b and the fin portions 147 and 148 of the disk body 14c. In the damper 14, the disk body 14c is a rotation side integrated with the rotation support shaft 9a, and the cap body 14a and the bottom plate body 14b are fixed sides, and the circular grooves 143 and 144 of the cap body 14a and the bottom plate body 14b and the fins of the disk body 14c. Since the parts 147 and 148 are brought into contact with each other through the oil, they are assembled so as to decelerate the rotational speed of the rotation support shaft 9a by the viscous resistance of the oil.

  The damper 14 is assembled so that the start of the rotary shaft 9a and the start of the damper 14 are shifted with time. For this reason, an arc-shaped concave groove 149 centered on the rotation support shaft 9a is provided on the back side of the overhanging flange 141, and the arc-shaped concave groove 149 is fitted with the stopper pin 10d rising from the cover frame 10b. The cap body 14a, the bottom plate body 14b, and the disk body 14c are combined so as to gradually rotate integrally.

  In addition to the above, a pull pocket 15 for handling is provided in the center in front of the bottom of the seat cushion 1 so as to open downward (see FIG. 1). The pull pocket 15 is provided to store the folded seat body in the recess R of the vehicle body floor F and to lift it from the recess R of the vehicle body floor F.

  A tension strap 16 for unlocking the reclining mechanism 6 is pulled out behind the seat back 2. The tension strap 16 is mainly provided as an element for unlocking the reclining mechanism 6 so as to return the seat back to the seating posture after returning the entire seat to the forward position. An operation lever 17 for unlocking the striker lock 8 from the striker S is provided behind the seat back 2.

  In the rear seat configured as described above, the operator may perform the following operation from the rear side of the seat when the entire seat is tilted backward from the seating posture and reversed and stored in the recess R of the vehicle body floor F. First, the headrest 3 is pushed down to the upper surface of the seat back 2 and stored in the seat back 2. Next, since the operation lever 17 is pulled, the striker lock 8 is unlocked from the striker S. At the same time, as shown in FIG. 8 a, the entire seat is moved back slightly from the seat back 2, and the striker lock 8 is removed from the striker S.

  As the operator moves the entire seat back, the link mechanism 9 starts to move. First, as shown in FIG. 9b, the actuating rod 9c connected to the base bracket 5 (see FIG. 1) pushes the swivel plate 9b (see arrow A), and the swivel plate 9b rotates around the rotation support shaft 9a (see FIG. 9b). (See arrow B). In this initial state, as shown in FIG. 9c, the damper 14 is displaced between the stopper pin 10d of the cover frame 10b and the concave groove 149 of the overhanging flange 141, so that the speed reducing action is not exhibited.

  As the turning plate 9b rotates, the bridging bar 9e connected to the front corner of the turning plate 9b pushes the connecting side of the swinging bar 9d by the support shaft 92b (see arrow C). When the swing bar 9d is pushed by the first bridging bar 9e, the swing bar 9d swings around the support shaft 92b (see arrow D), and the swing bar 9d causes the pulling wire 11a of the cable wire 11 to move. Since it is pulled, the reclining mechanism 6 is unlocked.

  As described above, when the reclining mechanism 6 is unlocked, the spiral spring 7 is biased in the contracting direction, and the seat cushion 1 is attracted to the seat back 2 by the spiral spring 7 as shown in FIG. Accordingly, as shown in FIG. 9b, the swivel plate 9b is further pushed around by the actuating rod 9c, so that the damper 14 protrudes as shown in FIG. 9c, and the concave groove 149 of the overhanging portion 141 becomes the stopper of the cover frame 10b. The pin 10d is engaged.

  When the seat cushion 1 is further pulled by the spiral spring 7 as shown in FIG. 10a, the bridging bar 9e pulls the swing bar 9d (see arrow H) as shown in FIG. Since the pulling wire 11a of the wire cable 11 is released from the tension, the reclining mechanism 6 is locked. While the seat cushion 1 is being pulled, the damper 14 is actuated as shown in FIG. 10c, so that the pulling by the spiral spring 7 of the seat cushion 1 is decelerated, so that the seat cushion 1 and the seat back 2 are stable. It is often folded into one.

  Thereafter, since the seat cushion 1 and the seat back 2 are folded and held together by the reclining mechanism 6, the operator places his / her hand on the pull pocket 15 as shown in FIG. What is necessary is just to accommodate in the recessed part R of this. Also at this time, as shown in FIG. 11b, the damper 14 is operated, so that the entire folded sheet can be stably stored in the recess R of the vehicle body floor F.

  When the entire seat is returned to the seating posture, an operator may hold the pull pocket 15 and take the entire seat out of the storage recess R of the vehicle body floor F as shown in FIG. As the entire sheet is taken out, the link mechanism 9 returns as shown in FIG. 12B, and the damper 14 also returns together with the link mechanism 9 in an idle swinging state.

  While the entire sheet is being taken out, the swinging bar 9d swings around the support shaft 90, and the pulling wire 11a of the cable wire 11 is pulled by the swinging bar 9d, so that the reclining mechanism 6 is unlocked. However, even when the reclining mechanism 6 is unlocked, the seat cushion 1 and the seat back 2 are folded together by the spiral spring 7, so that the entire seat can be stably taken out from the storage recess R of the vehicle body floor F.

  Thereafter, as the entire sheet is taken out by the worker as shown in FIG. 13a, the damper 14 starts to operate as shown in FIG. 13b, and can be stably returned because the forward tilting speed of the entire sheet can be reduced.

  Since the reclining mechanism 6 returns to the locked state, the entire seat is returned until the seat leg 4 is locked to the striker S with the striker lock 8 while the seat body is folded, and the seat cushion 1 is locked. Install it on the floor surface of the vehicle body floor F. Finally, since the strap 16 is pulled, the reclining mechanism 6 may be unlocked and the seat back 2 may be operated to be in the sitting posture.

  By such operations, the entire seat can be stored in the recess R of the vehicle body floor F, so that the reclining mechanism 6 can be unlocked and locked, the entire seat is moved backward, the entire seat is returned and the one-motion is linked with a simple mechanism. Therefore, it is possible to easily perform the redesign work in the vehicle.

It is a side view which shows the folding storage type vehicle seat which concerns on this invention. It is sectional drawing which shows the internal structure of the reclining mechanism with which the sheet | seat of FIG. 1 is equipped. 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 link mechanism for a reclining mechanism cooperation with which the seat cushion of FIG. 1 is equipped. It is a side view which shows the back frame which comprises the seat back of FIG. It is sectional drawing which shows the internal structure of the damper assembled | attached to the link mechanism of FIG. It is a top view which shows the link mechanism containing the damper of FIG. It is explanatory drawing which shows the sheet | seat of FIG. 1 in the folding initial stage. It is explanatory drawing which shows the operating state of the link mechanism corresponding to the sheet | seat of FIG. 8a. It is explanatory drawing which shows the motion of the damper corresponding to the sheet | seat of FIG. 8a. It is explanatory drawing which shows the state just before folding of the sheet | seat following the sheet | seat of FIG. 8a. It is explanatory drawing which shows the operating state of the link mechanism corresponding to the sheet | seat of FIG. 9a. It is explanatory drawing which shows the motion of the damper corresponding to the sheet | seat of FIG. 9a. It is explanatory drawing which shows the folding state of the sheet | seat following the sheet | seat of FIG. 9a. It is explanatory drawing which shows the operating state of the link mechanism corresponding to the sheet | seat of FIG. 10a. It is explanatory drawing which shows the motion of the damper corresponding to the sheet | seat of FIG. 10a. It is explanatory drawing which shows the folding storage state of the sheet | seat following the sheet | seat of FIG. 10a. It is explanatory drawing which shows the motion of the damper corresponding to the sheet | seat of FIG. 11a. It is explanatory drawing which shows the sheet | seat of FIG. It is explanatory drawing which shows the motion of the damper corresponding to the sheet | seat of FIG. 12a. It is explanatory drawing which shows the way forward of the sheet | seat following the sheet | seat of FIG. 12a. It is explanatory drawing which shows the motion of the damper corresponding to the sheet | seat of FIG. 13a. FIG. 13B is an explanatory diagram illustrating a state in which the sheet is moved forward after the sheet in FIG. 13A.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat cushion 2 Seat back 5 Base bracket 6 Reclining mechanism 7 Spiral spring 9 Link mechanism 9a Rotating support shaft 9b Rotating plate 9c Actuating rod 9d Swing bar 9e Bridge bar 10a, 10b Support frame 11 Wire cable 14 Damper F Body floor

Claims (2)

The front side of the seat cushion (1) is installed and supported on the floor surface of the vehicle body floor (F), the rear side of the seat cushion (1) is mounted on the vehicle body floor (F), and the seat back (2) is mounted. A reclining mechanism (6) that locks and holds so that the angle can be adjusted or tilted forward, and a spiral spring (7) that pulls the seat cushion (1) and the seat back (2) in the folding direction when the reclining mechanism (6) is unlocked ) Between the seat cushion (1) and the seat back (2),
Remove the front side of the seat cushion (1) from the vehicle floor (F), fold the seat cushion (1) and seat back (2) together, and reverse the entire seat backward from the vehicle floor (F) In the automobile seat to be stored,
The rotation support shaft (9a) is held upright on the plate surface of the support plate (10a, 10b), and the axis of the rotation support shaft (9a) is fitted to the approximate center of the plate surface so that the width direction of the seat cushion (1) The swivel plate (9b) heading toward the surface is disposed on the plate surface of the support plate (10a, 10b) by the rotation support shaft (9a), and the outer end of the swivel plate (9b) is attached to the base bracket (9c) by the operating rod (9c). 5) The swing bar (9d) is arranged on the plate surface of the support plate (10a, 10b) near the swivel plate (9b) by the support shaft (90) which is connected to the center of the plate surface while being connected to the plate surface. One end of the swing lever (9d) and the inner end of the swivel plate (9b) are connected by a bridging bar (9e), and the other end of the swing bar (9d) is connected to a wire cable (11). With the reclining mechanism (6),
The reclining mechanism (6) is unlocked from locking and unlocking, and reciprocating from locking to unlocking in conjunction with the pushing or returning rotation of the swivel plate (9b) by the actuating rod (9c) accompanying the backward or returning operation of the entire seat. A folding storage type automobile seat comprising a link mechanism (9) for moving the seat cushion (1). The seat cushion (1) is provided with a link mechanism (9) in which a damper (14) for controlling the deceleration of the entire seat is pushed back or returned on the same axis of the rotation support shaft (9a). The folding storage type automobile seat according to claim 1.

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