JP2010208511A - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein a constitution for tipping up a seat cushion in linking with forward inclination of a seat back and setting reclining by inclining the seat back backward is unknown. <P>SOLUTION: A reclining device 20 is mounted on the seat back 14 coaxially with a guide arm 32 fixed to the seat back 14. A guide plate 34 with a guide hole 34a is fixed to a rear bracket 18. An oscillation link 36 is divided into a main link 36M with a guide hole 36c and a sub link 36S provided oscillatably in the main link 36M. A guide pin 39 is provided in the sub link 36S and is inserted into a guide hole 32a of the guide arm 32 via the guide holes 36c and 34a. The guide pin 39 is slid by being guided by the guide holes 36c and 34a, and thereby the sub link 36S is oscillated in relation to the main link 36M and oscillation of the oscillation link 36 is regulated in a direction for pushing an interlocking arm. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is a vehicle seat that can be used as a loading platform in which the rear surface of the seat back is continued to the rear luggage compartment by forcing the seat back forward in a substantially horizontal space in a space vacated by the front seat cushion jumping up, The present invention relates to a vehicle seat that moves a seat cushion between a seating position and a front flip-up position in conjunction with forward and backward movement of a seat back.

  In conjunction with the forward movement of the seat back, the seat cushion is flipped forward, and the seat back is moved forward almost horizontally in the vacant space so that the back (back) of the seat back can be used as a loading platform that is continuous with the rear luggage compartment. So-called variable form vehicle seats are widely known as rear seats for station wagons and recreational vehicles.

  The applicant of the present invention relates to a vehicle in which the swing cushion is swung in conjunction with the forward tilt of the seat back, and the seat cushion is flipped up forward in response to the forward and backward movement of the interlock arm having one end connected to the swing link. A sheet is disclosed in Japanese Patent Application Laid-Open No. 2007-269191.

  In the vehicle seat described in this publication, a seat back is pivotally supported by a rear bracket on a vehicle floor, and an interlocking arm is connected to one end of a swing link pivotally supported by the rear bracket so that the floor body is located below the seat cushion. The gear mechanism is disposed on the front side of the seat mechanism, and the swinging link with the other end connected is swung by pushing the seat back forward to push out the interlocking arm to drive the sector gear of the gear mechanism. Then, the driving force of the sector gear is transmitted to the gears provided at the other ends of the two links (actuating link and auxiliary link) connected to the seat cushion at different positions, and the gears at the other ends of the links are respectively oscillated. By swinging the two links as a moving fulcrum (hinge), the seat cushion can be flipped up in conjunction with the forward tilting of the seat back.

  According to the configuration disclosed in Japanese Patent Application Laid-Open No. 2007-269191, the seat cushion is flipped forward by the pushing-out of the connecting arm by the forward movement operation of the seat back, and the seat back is moved forward almost horizontally in a space that is vacant. (Back) can be used as a loading platform continuous to the rear cargo compartment. Further, when the substantially horizontal seat back is pulled back in the direction of the initial position (if pulled up), the connecting arm is pulled back, the seat cushion is returned to the substantially horizontal initial position, and the normal seating position is set.

  In this way, the movement of the seat cushion between the seating position and the front flip-up position is performed in conjunction with the forward and backward retracting of the seat back, eliminating the need for individual operations on the seat cushion, setting the loading platform, and the seating position. The change of the seat form, that is, the return to the (initial position) can be performed only by the operation of the seat back (forward and backward).

  In general, in a vehicle seat in which the seat cushion is flipped forward in conjunction with the forward movement of the seat back, the seat cushion is flipped up under a swing around the hinge on the front side. The swing radius at the rear end of the seat cushion during swinging tends to increase. Since the swing locus of the rear end of the seat cushion passes through a position close to the seat back that is tilted forward, there is a risk of interference between the seat back and the seat cushion when the seat configuration is changed. Here, the term “front and back” means that the side near the seat back is the rear and the side away from the seat back is the front.

  Therefore, in the vehicle seat disclosed in Japanese Patent Application Laid-Open No. 2007-269191, the gear of the gear shaft connected to the other end of the operating link (gear of the operating link) is meshed with the sector gear, whereas the auxiliary link The gear of the gear shaft connected to the other end (gear of the auxiliary link) is engaged with the gear of the operating link via the intermediate gear, and is decelerated from the gear of the operating link. Further, one end of the auxiliary link is connected to the seat cushion at the rear side (closer to the seat back) than the one end of the operation link so as to be movable along a guide hole provided in the seat cushion. Then, the swing of the auxiliary link is decelerated and the auxiliary link (movable link) is moved along the guide hole, so that the rear end of the seat cushion can be flipped up more quickly than the front end.

  Also, a guide arm having one end connected to the seat back and a long hole-like guide hole formed at the other end is attached to the side of the seat back coaxially with the seat back, and is provided at the other end of the swing link. A pin (guide pin) is inserted through the guide hole. Here, the guide hole of the guide arm is formed in a shape in which the seat cushion jumps up substantially in the first half of the forward movement of the seat back, and in the latter half of the forward movement, the seat back is moved forward without pushing out the interlocking arm. .

In other words, the guide hole provided in the guide arm (the guide hole of the guide arm) includes a front half that is the right half and a rear half that is continuous to the front half and the left half when the vehicle seat is disposed rightward. And is formed from. Then, the shape of the latter half portion is obtained by simulation on the design so that the seat cushion can be lifted up substantially in the first half of the forward movement of the seat back. In addition, since the front half is an arc-shaped long hole centered on the swing axis of the guide arm, the guide arm can be swung without swinging the swing link. The seat back can be moved forward without pushing out the interlocking arm.
In such a configuration, since the seat cushion is lifted up substantially before the seat back is fully moved forward, interference between the seat back and the seat cushion can be reliably avoided.

JP 2007-269191 A

Even in a vehicle seat in which the seat cushion is flipped up (forward) in conjunction with the forward leaning of the seat back, it is desired to set a preferred seating posture (reclining) by tilting the seat back backward.
However, this type of vehicle seat does not take into account the backward tilt of the seatback, and even if a reclining device is provided, reclining cannot be set with the same configuration.

For example, in Japanese Patent Application Laid-Open No. 2007-269191, a pin provided in the other end of the swing link is inserted into a guide hole provided in a guide arm on the side portion of the seat back, and the seat back is a guide hole in the guide arm. It can be swung only within the range. And although the guide hole is formed in a shape that allows the seat back to be tilted forward, it does not have a shape that allows the seat back to tilt backward. Even if the guide hole of the guide arm is formed so as to allow the seat back to tilt backward, when the swinging link swings when the guide arm swings due to the backward tilt, the interlocking arm is pushed out. The swing of the swing link and the push-out of the interlocking arm generated thereby may be within the range of play, but if it exceeds the range of play, the seat cushion will spring up, which is not allowed.
Conventionally, there is no known configuration in which reclining is set by flipping up the seat cushion in conjunction with the forward tilt of the seat back and tilting the seat back backward.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle seat capable of setting a reclining by flipping up a seat cushion in conjunction with a forward tilt of the seat back and tilting the seat back backward.

In order to achieve the above object, in the present invention, the swing link is divided into a main link and a sub link that can swing, and the interlocking arm is pushed out by swinging the sub link. The main link is prevented from swinging.
That is, according to the first aspect of the present invention, the guide arm having one end integrally connected to the seat back and the guide hole provided at the other end is pivotally supported on the rear bracket on the vehicle floor coaxially with the seat back. Insert a guide pin provided at one end of the swing link provided on the bracket so as to be swingable into the guide hole of the guide arm, connect one end of the interlocking arm to the other end of the swing link, and swing the swing link. Correspondingly, the reclining device is seated coaxially with the guide arm in the vehicle seat that moves the seat cushion between the seating position and the front flip-up position by pushing the pulling arm back and pulling it back and pulling it back Installed on the back. A guide plate with a guide hole is fixed to the rear bracket, and the swing link is divided into a main link with a guide hole swingably provided on the rear bracket and a sub-link provided swingably on the main link. The interlocking arm is connected to one end of the main link, and the guide pin is provided in the sub link and is inserted into the guide hole of the guide arm through the guide hole of the main link and the guide hole of the guide plate. Yes. The guide pin is guided and slid by the guide hole of the main link and the guide hole of the guide plate. The swing of the main link in the pushing direction is restricted.

  According to the second aspect of the present invention, the biasing member is installed between the main link and the sub link, the guide pin is pressed against one end of the guide hole of the main link, and the swing of the sub link with respect to the main link is restricted. A stopper is provided, and swinging of the main link in a direction in which the interlocking arm is pushed out by bringing the main link into contact with the stopper is restricted.

  According to the third aspect of the present invention, the guide hole of the main link is formed in an arc-shaped long hole centered on the swing shaft of the sub link, and the guide hole of the guide plate is connected to the swing shaft of the main link. It is formed of a rear half portion formed of a circular arc-shaped long hole at the center, and a front half portion formed of an arc-shaped long hole that is continuous with the latter half portion and is centered on the swing axis of the sublink. In addition, the guide hole of the guide arm includes a rear half part formed of an arc-shaped long hole centering on a common axis with the reclining device, and a front half part formed of a long hole continuous with the rear half part and allowing the guide arm to tilt backward. And is formed from.

  In the present invention according to claim 1, since the swing link is divided into a main link and a sub link that can swing, various and fine swings are possible. Then, a guide plate with a guide hole is fixed to the rear bracket, and a guide pin provided on the sub link is inserted into a guide hole provided on the swing link and a guide hole on the guide arm to guide to the guide hole on the fixed guide plate. Thus, the sliding of the main link in the direction in which the sub link is swung and the interlocking arm is pushed out is restricted by sliding, so that the seat back can be tilted backward and reclining can be set.

  In the present invention according to claim 2, various subtle swings can be easily generated on the sublink by the biasing member between the main link and the sublink, and the interlocking arm is pushed out by bringing the main link into contact with the stopper. The swing of the main link can be reliably controlled.

  In the present invention according to claim 3, the main link has an arc-shaped long hole centering on the swinging axis of the sub link, and the guide plate has an arc-shaped long hole centering on the swinging axis of the main link. Therefore, the sub link can swing smoothly with respect to the main link and the main link with respect to the guide plate.

The schematic diagram at the time of the backward inclination of the vehicle seat which concerns on one Example of this invention is shown. The side view of the vehicle seat by which the seat cushion was flipped up is shown. (A)-(D) show the schematic diagram of the raising of a seat cushion. The partial side view of the vehicle seat in the reference position of a seat back is shown. The fragmentary perspective view of the vehicle seat in the reference position of a seat back is shown. The disassembled perspective view of the vehicle seat in the reference position of a seat back is shown. (A), (B), and (C) are side views of a guide arm, a guide plate, and a swing link that are constituent members of a vehicle seat, respectively. The side view of the rear bracket which is a structural member of a vehicle seat is shown. The partial side view of the vehicle seat in the last inclination position C of a seat back is shown. The partial side view of the vehicle seat in the initial position B of a seat back is shown. (A), (B), and (C) are schematic views respectively showing the relationship between the guide pins and the respective guide holes at the reference position, initial position, and last tilt position of the seat back. The partial side view of the vehicle seat which has a seat back in an initial position is shown. The partial side view of the vehicle seat in the initial stage of the raising of a seat cushion is shown. The partial side view of the vehicle seat in the intermediate | middle stage of raising of a seat cushion is shown. The partial side view of the vehicle seat in the final stage of the raising of a seat cushion is shown.

  A reclining device is attached to the seat back coaxially with the guide arm, and a guide plate with a guide hole is fixed to the rear bracket. The swing link is divided into a main link with a guide hole provided in the rear bracket so as to be swingable and a sub link provided in the main link so as to be swingable, and an interlocking arm is provided at one end of the main link. The guide pins are connected to the sub links and are inserted into the guide holes of the guide arm through the guide holes of the main link and the guide holes of the guide plate. The guide pin is guided and slid by the guide hole of the main link and the guide hole of the guide plate. The swing of the main link in the pushing direction is restricted

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the present invention, the vehicle seat is provided with a reclining device, and not only the seat cushion is moved between the seating position and the flip-up position in conjunction with the forward and backward retracting of the seatback, but also the rearward tilt of the seatback. That is, reclining can be set. Therefore, the constituent members of the vehicle seat are roughly classified into those involved in the swinging of the seat back for backward tilting and those involved in the interlocking of the seat back and the seat cushion.

FIG. 1 is a schematic view of a vehicle seat according to an embodiment of the present invention when the seat back is tilted backward.
The vehicle seat 10 includes a seat cushion 12 and a seat back 14, and a reference position of the seat back 14 is indicated by A. At this reference position, the seat cushion is located at a substantially horizontal seating position. It is inclined at approximately 120 ° with respect to the upper surface. The reference position A is a position used as a reference in the design, and the inclined position of approximately 120 ° of the seat back 14 is an example, and is not limited thereto.

The seat back 14 is pivotally supported by a bracket (rear bracket) 18 fixed to the vehicle floor 16. A reclining device (reclining device) 20 is mounted coaxially with the seat back, and a reclining shaft 22 serves as a common support shaft (common shaft).
In addition, in FIG. 1, since the vehicle seat 10 is disposed rightward, the right is the front and the left is the rear.

  A biasing force that swings the seat back 14 in the direction of the initial position B is constantly applied to the seat back 14 by a torsion spring (not shown) of the reclining device 20. The reference position A is within the reclining range of the seat back 14, and when the reclining lever (lock-off lever; not shown) is pulled, the reclining device is locked off, and the seat back 14 is subjected to the biasing force of the torsion spring of the reclining device. And return to the initial position B. If a rearward pressing force is applied to the seat back 14 in the lock-off state, the seat back 14 is tilted backward to its last tilt position C against the biasing force of the torsion spring, and if it is returned to the lock-on state, the initial position B, the last tilt position Reclining is set at an arbitrary rearward tilt position between C. In addition, since the structure of the reclining apparatus 20 is well-known and the structure of a reclining apparatus is not the summary of this invention, the detailed description is abbreviate | omitted.

FIG. 2 is a side view of the vehicle seat in which the seat cushion is flipped up, and FIGS. 3A to 3D are schematic views of the seat cushion being flipped up.
In FIG. 1, when the seat back 14 is pushed forward in the X direction as indicated by an arrow from the initial reclining position B, as shown in FIGS. 3 (A) to 3 (C), the seat cushion is interlocked with the forward tilt of the seat back. 12 is flipped up with its front leading and then lifted approximately horizontally while moving forward.

  When the seat back 14 is further moved forward, as shown in FIG. 3 (D), the seat cushion 12 is flipped forward while showing its back surface and retracted to an upright position in front of the seat back, and the empty space is left. The seat back falls down substantially horizontally (see FIG. 2). Then, the back surface (back) 14a of the seat back 14 positioned substantially horizontally can be used as a loading platform that is continuous with a rear luggage compartment (not shown) on the left side of the drawing.

Conversely, if the seat back 14 that has fallen substantially horizontally is pulled back upward, the seat cushion 12 is swung substantially horizontally in conjunction with the pull back of the seat back (see FIG. 3C), and remains rearward while remaining substantially horizontal. And move back to the seating position shown in FIGS. 1 and 3A.
In this way, the movement of the seat cushion 12 between the seating position (FIG. 3A) and the flip-up position (FIG. 3D) occurs in conjunction with the forward and backward pulling of the seat back 14, Returning to the seating position can be done quickly and easily.

  In addition, as will be described later, since the seat cushion 12 jumps up substantially before the forward movement of the seat back 14 starts in earnest, there is no room for interference between the seat back and the seat cushion. In conjunction with this, the seat cushion can be raised smoothly.

  As described above, when the reclining device 20 is locked off, the seat back 14 returns to its initial position B and stops under the biasing force of the torsion spring. However, if the biasing force of the torsion spring is too strong, the torsion spring may not be stopped at the initial position B and may be tilted forward. Therefore, it is necessary to use a torsion spring (a torsion spring having a biasing force weaker than the conventional one) that can reliably stop the seat back 14 at the initial position B.

  In addition, a stopper protruding on the swinging locus of the seat back is provided, and the seat back 14 is normally positioned at the initial position B by the stopper. When the seat back is moved forward, the stopper is moved out of the swinging locus of the seat back (relief). ) Configuration is also possible. For example, if the rear bracket 18 is provided with a stopper protruding on the swinging locus of the seat back under the biasing force of the compression spring, and the stopper is released from the swinging locus of the seatback against the biasing force of the spring, the seat back Can be moved forward.

First, a configuration related to swinging of the seat back for backward tilting will be described.
4 to 6 show a partial side view, a partial perspective view, and an exploded perspective view of the vehicle seat at the reference position A of the seat back, respectively. The vehicle seat 10 includes a guide arm 32, a guide plate 34, and a swing link 36. It has. 7A, 7B, and 7C are side views of the guide arm 32, the guide plate 34, and the swing link 36, which are constituent members of the vehicle seat.

  As shown in FIGS. 5 and 6, the guide arm 32 is formed by bending a plate material, one end of which is bolted to the seat back 14, and a reclining shaft that penetrates the seat back 14 and the reclining device 20. 22 is inserted through the central portion of the guide arm. As can be seen from FIG. 7A, a guide hole 32 a is formed at the other end of the guide arm 32. In FIG. 7A, reference numerals 32b and 32c denote a shaft support hole through which the reclining shaft (support shaft) 22 is inserted and a bolt insertion hole, respectively.

  The guide hole 32a of the guide arm is composed of two continuous portions, one of which (the front half and the right half) 32aR is an arc-shaped long hole centered on the shaft support hole 32b, and the other (the latter half, the left half). Part) 32aL is formed continuously in the right half.

  As in the prior art, the shape of the left half portion 32aL of the guide hole is determined by simulation on the design so that the seat cushion is almost completely lifted up in the first half of the seatback. Further, since the right half portion 32aR is an arc-shaped long hole centered on the swinging shaft (reclining shaft 22) of the guide arm as in the prior art, the guide arm 32 is not swung. The seat back 14 can be moved forward without pushing the interlocking arm in the latter half of the forward movement.

FIG. 8 shows a side view of the rear bracket 18. As shown in FIG. 8, the rear bracket 18 is divided into upper and lower parts, and is configured by bolting the upper end of the lower half 18L to the lower end of the upper half 18U. The bottom of the lower half is shown in FIG. As shown, it has a substantially flat shape corresponding to the vehicle floor such that the left and right ends abut against the vehicle floor 16 and are bolted.
More specifically, the center of the top of the lower half 18L of the rear bracket is notched, and the upper half 18U is bolted to the lower half with the insertion holes 18b1 and 18b2 provided on the left and right of the notch 18La as bolt holes. Yes. An insertion hole 18c is formed in the upper half 18U of the rear bracket, and an insertion hole 18d (see FIGS. 5 and 6) through which a bolt for bolting to the vehicle floor 16 is inserted is formed in the bottom surface of the lower half. Has been.

  As can be clearly understood from FIGS. 6 and 8, the stopper 18-1 and the support shaft 18-2 are fixed to the rear bracket 18 and outward (in a direction away from the reclining device 20) through a notch 18 La at the top of the lower half. The stopper 18-1 is formed in a pin shape, the support shaft 18-2 is formed in a two-step stepped pin shape having a small diameter at the tip, and the screw hole 18-2a is formed at the tip of the support shaft. Is formed. However, the stopper 18-1 only needs to function as a stopper, and the shape thereof is not limited to the pin shape.

As shown in FIGS. 6 and 7B, the guide plate 34 is formed of a plate material by bending the vicinity of the bases of the two leg portions so that the two left and right leg portions are flattened one step lower. A guide hole 34a is formed in the vicinity of the center. Reference numerals 34b1, 34b2, and 34c denote insertion holes provided at the left and right leg portions and substantially at the center, respectively.
The guide hole 34a of the guide plate is composed of two continuous parts, one of which (the latter half, the left half) 34aL is an arc-shaped elongated hole centering on the insertion hole (the center hole) 34c, and the other (the first half) Part, right half part) 34aR is formed continuously to the left half part.

  As shown in FIG. 6, bolts are respectively inserted into the guide plate insertion hole 34b1 and the rear bracket upper half insertion hole 18b1, and the guide plate insertion hole 34b2 and the rear bracket insertion hole 18b2. The guide plate 34 is bolted to the rear bracket 18.

A swing link 36 is disposed on the side of the guide plate 34 fixed to the rear bracket 18, and the swing link is divided into a main link 36M and a sub link 36S.
The main link 36M has a flat plate shape, and as shown in FIG. 7 (C), the insertion hole 36a is formed at the approximate center of the main link, the insertion hole 36b, the guide hole 36c, etc. at one end thereof (the upper end in FIG. 7 (C)) Two insertion holes 36d and 36e are formed at the ends (the lower end in FIG. 7C).
Further, as shown in FIGS. 6 and 7C, the sub link 36S is formed by bending a plate material so that the right end of the sub link 36S is one step lower, and the insertion holes 36b 'and 36d' are formed at the left and right ends. An insertion hole 36c 'is formed in each.

  As shown in FIGS. 5 and 6, the two-stage stepped pin-shaped support shaft 18-2 of the rear bracket extends through the insertion hole (center hole) 34 c in the center of the guide plate 34, and extends to the front end of the support shaft. An insertion hole 36a at the center of the main link is inserted through the small diameter portion of the main link, and a bolt 37a is screwed into the screw hole 18-2a of the support shaft so that the main link is swingably supported by the support shaft (supported by the shaft). ing). The bolt 37a is formed with a male screw only at the tip, and the portion that supports the main link is a shaft portion that is not threaded.

A mounting pin (headed pin) 38a is inserted into the insertion hole 36b 'of the sub link 36S and extends inward (in the direction approaching the reclining device 20, the same applies hereinafter), and is inserted into the insertion hole 36b of the main link. .
That is, the main link 36M can swing with respect to the guide plate 34 and the rear bracket 18 with the support shaft 18-2 as the swing center, and the sub link 36S swings with respect to the main link with the mounting pin 38a as the swing center. It is possible.
As described above, since the swing link 36 is divided into the main link 36M and the sub link 36S that can swing, various and fine swings are possible.

Further, the guide pin 39 is inserted into the center insertion hole (center hole) 36c ′ of the sub link 36S and extends inward, first to the guide hole 36c of the main link, then to the guide hole 34a of the guide plate, and finally The guide holes are respectively inserted into the guide holes 32a.
Here, since the sub link 36S swings on the main link with the mounting pin 38a as the swing center, the guide hole 36c of the main link for guiding the guide pin 39 has an arc shape with the mounting pin (swing center) as the center. It is formed in a long hole. Further, considering the main link 36M itself, the mounting pin 38a is inserted through the insertion hole 36b, so that the guide hole 36c can also be referred to as an arc-shaped long hole centered on the insertion hole 36b.

  The guide pin 39 is inserted into the guide hole 34a of the guide plate and the guide hole 36c of the main link, and the left half portion 34aL of the guide hole 34a is an arc-shaped elongated hole centering on the insertion hole 34c, and the support shaft 18-2. Is inserted through the guide plate insertion hole 34c and the main link center hole 36a. Therefore, when the guide pin 39 slides while being guided by the left half portion 34aL of the guide hole 34a, the main link 36M has the insertion hole 34c (center hole 36a) as the swing center and the support shaft 18-2 as the swing shaft. Can be swung on the guide plate.

  The right half 34aR of the guide hole of the guide plate is formed in a shape overlapping with the guide hole 36c of the main link at the reference position A of the seat back (see FIGS. 4 and 11C). That is, the right half portion 34aR is an arc-shaped long hole centered on the swing shaft (attachment pin) 38a of the sub link.

A biasing member 40 is provided for biasing the main link 36M around its swing center (support shaft 18-2) in the clockwise direction in FIGS. In the embodiment, the biasing member 40 is a tension coil spring installed between the main link 36M and the sub link 36S, and each end of the tension coil spring has an insertion hole (locking hole) 36d of the main link and a sub link. It is locked in the insertion hole (locking hole) 36d ′.
The main link 36M is pressed against the stopper 18-1 extending from the rear bracket 18 by the biasing force of the tension coil spring (biasing member) 40, and this position pressed against the stopper becomes the initial position of the main link.

  The main link M is swingably supported by the support shaft 18-2, and is pressed by the stopper 18-1 by the tension coil spring 40 to be positioned at the initial position. The main link 36M and the sub link 36S have the mounting pin 38a as a common shaft, and the guide pin 39 is connected to one end (the lower end in the figure) of the guide hole 36c of the main link by the tension coil spring 40 as shown in FIG. The pressed position is the initial position of the sublink.

  The right half (front half) 34aR of the guide hole of the guide plate has a common shaft (mounting pin 38a) for the main link and the sub link when the main link 36M and the sub link 36S are in the initial position on the guide plate 34. It is formed in a long hole having a circular arc shape as a center. That is, the other (front half) 34aR of the guide hole of the guide plate has a shape (same shape) overlapping with the guide hole 36c of the main link at the initial position.

  In the present invention, as shown in FIGS. 2 and 3, the seat cushion 12 is configured to be flipped forward in conjunction with the forward movement of the seat back 14, and the movement of the seat back 14 is transmitted to the seat cushion side. An interlocking member 42 is provided.

  In the embodiment, the interlocking member 42 is an interlocking arm, one end of which is bolted using the insertion hole 36e of the main link, and the main link 36M is connected to the tension coil spring 40 in conjunction with the forward tilting of the seat back 14. When it is swung counterclockwise against the biasing force, the interlocking arm is pushed forward (rightward) and the seat cushion 12 is flipped up. The movement of the seat cushion 12 caused by the pushing of the interlocking arm 42 will be described later.

The backward tilting (backward swing) of the seat back 14 in the vehicle seat 10 having the above configuration will be described.
FIGS. 9 and 10 show partial side views of the vehicle seat at the last tilt position C and the initial position B of the seat back. FIGS. 11A, 11B, and 11C are the reference position A and the initial position B of the seat back. FIG. 5 is a schematic view showing a relationship between a guide pin and each guide hole at the last tilt position C.

By operating the reclining lever, the reclining device 20 is unlocked, and the seat back 14 is pressed backward from the reference position A (in the direction of the last inclined position C in FIG. 1).
The guide arm 32 integrated with the seat back 14 tends to swing counterclockwise (rearward) around the swing center (reclining shaft) 22 in FIGS. 4 and 11A.

  As described above, at the reference position A of the vehicle seat, the main link 36M and the sub link 36S are in their initial positions, and a part of the guide hole (the right half, the front half) 34aR of the fixed guide plate 34 is the main link. This overlaps with the guide hole 36c. Therefore, when a swinging force that swings the guide arm 32 counterclockwise around the swing center (the reclining shaft 22) is applied to the guide arm, the guide pin 39 of the sublink in FIG. Guided by the right half (front half) 34aR, the sub link 36S swings counterclockwise around its swing center (mounting pin 38a, insertion hole 36b ') against the biasing force of the tension coil spring 40. To do. Since the guide hole 36c of the main link overlaps with the right half (front half) 34aR of the guide hole of the guide plate, the guide pin 39 is guided by the guide hole 36c and slides.

  Here, the guide pin 39 is inserted not only into the guide hole 36c of the main link and the guide hole 34a of the guide plate but also into the guide hole 32a of the guide arm, and the guide pin is inserted into a part of the guide hole 32a (the left half portion). The guide arm 32 is formed in an elongated hole shape that allows the guide arm 32 to swing counterclockwise (rearward) around its swing center (the reclining shaft 22) while being guided by the second half portion 32aL. That is, the left half part (second half part) 32aL of the guide hole of the guide arm guides the guide pin 39, and allows the guide arm 32 to swing backward, that is, to allow the seat back 14 to tilt backward. It has become.

  The reclining device 20 is locked by interrupting the pressing of the seat back 14 to the rear and releasing the reclining lever, and an arbitrary rearward tilting position (reclining angle) of the seatback is obtained between the reference position A and the final tilting position C. . When the swing of the guide arm 32 is interrupted, the sub link 36S swings clockwise around the swing center by the biasing force of the tension coil spring 40, and the guide pin 39 is one end of the guide hole 36c of the main link ( It is returned to its initial position pressed by the lower end and the left end.

  When the seat back 14 is tilted backward from the reference position A while swinging the guide arm 32 counterclockwise, the guide pin 39 is guided by a part (left half part, rear half part) 32aL of the guide hole of the guide arm. Ascends in the guide hole 32a. When the guide pin 39 reaches the end (upper end) of the left half (second half) 32aL of the guide hole (see FIG. 11C), the swing of the guide arm 32 in the counterclockwise direction is restricted, and more Is not possible, and this position is the last tilt position C of the seat back 14 shown in FIGS.

  Since a clockwise biasing force is applied to the main link 36M by the tension coil spring 40 around the swing center (mounting pin) 38a, the main link 36M is moved by being pushed by the stopper 18-1 when tilted backward. No (does not rock).

  The seat back 14 is pressed in the direction of the initial position B by the torsion spring of the reclining device 20. Therefore, if the reclining lever 20 is unlocked by grasping the reclining lever without applying a pressing force to the seat back 14 at the last tilt position C of the seat back 14, the guide arm 32 integrated with the seat back 14 becomes the reclining device. Oscillates in the initial position B direction (clockwise) by the biasing force of the torsion spring.

  In the swinging of the guide arm 32 in the initial position B direction, the guide pin 39 is guided by a part (left half part, latter half part) 32aL of the guide arm 32 and part of the guide hole ( (Right half, front half) 34aR. When the reference position A of the seat back 14 is passed, as shown in FIG. 11 (A), the guide pin 39 enters the other part (left half, rear half) 34aL of the guide hole 34a of the guide plate, and thereafter The guide hole 34a is guided to the right half (second half 34aL), but the guide hole 32a of the guide arm 32 is always guided to a part (left half, second half) 32aL.

  At this time, the sub link 36S is guided so that the guide pin 39 is guided by the left half (second half) 32aL of the guide hole 32a of the guide arm and the front half 34aR and the second half 34aL of the guide hole 34a of the guide plate. While sliding the pin 39 in the guide hole 36c of the main link, it swings clockwise until the reference position A, and counterclockwise when the reference position A is passed.

  When the reclining lever is released at the initial position B, the seat back 14 is stopped and locked. At this initial position B, as shown in FIG. 11B, the guide pin 39 stops at substantially the center of the rear half portions 32aL and 34aL of the guide hole 32a of the guide arm and the guide hole 34a of the guide plate.

  As described above, the guide pin 39 is guided by the guide hole 34a of the fixed guide plate 34, and the guide pin 36 is guided by the guide hole 36c of the main link to swing the sub link 36S. The back 14 can be tilted backward. When the seat back 14 is tilted backward, the swing of the main link 36M is regulated by swinging the sub link 36S in response to the swing of the guide arm 32. The cushion does not spring up.

Next, a description will be given of the forward tilting of the seat back 14 (forward swinging) and the forward jumping of the seat back 12 associated therewith.
The configuration in which the seat back is flipped forward is the same as the configuration described in the prior application of the present applicant (Japanese Patent Laid-Open No. 2007-269191), and is not the gist of the present invention, so the configuration of Japanese Patent Laid-Open No. 2007-269191 A brief description will be given by adding 100 to the members.

FIG. 12 shows a partial side view of the vehicle seat with the seat back in the initial position. 13 to 15 are partial side views of the vehicle seat at the initial stage, the intermediate stage, and the final stage of the raising of the seat cushion, respectively. 13 to 15 correspond to FIGS. 3B, 3C, and 3D.
The vehicle seat 10 includes an operating link 116 and a posture assisting link 118 as constituent members involved in the interlocking of the seat back 14 and the seat cushion 12, and the seat cushion is movably supported by these two links.

  The operation link 116 is formed to have a drive pivot point 116a for the floor and a free pivot point 116b on the seat cushion side. The posture assisting link 118 includes a floor-side drive pivot point 118a disposed on the front side of the drive link drive pivot point, and a seat cushion disposed on the rear side of the free link pivot point of the actuation link so as to be movable with respect to the seat cushion 12. And a free pivot point 118b on the side.

  The operation link 116 and the posture auxiliary link 118 are synchronously operated in conjunction with the swing (forward swing) of the seat back 14 for flipping up the seat cushion 12, and the operation link and posture with respect to the swing of the seat back. Synchronous interlocking of the auxiliary link is obtained by the gear mechanism 122 having the sector gear 120.

  The swing of the seat back 14 for raising the seat cushion is taken out as a back-and-forth motion of the interlocking arm 42, and this back-and-forth motion of the interlocking arm is converted into swinging of the sector gear 120 pivotally supported at the front end of the interlocking arm. Thus, the synchronous linkage of the operation link 116 and the posture auxiliary link 118 via the gear mechanism 122 is possible.

  The gear mechanism 122 is configured by assembling various gears to the front bracket 128 fixed to the floor 16 near the front end portion of the seat cushion 12, and the gear mechanism is, for example, a first drive meshed with the sector gear 120. A combination of the gear 130 and a second drive gear 134 to which the power is transmitted through a transmission gear 132 meshed with the first drive gear is configured. The support shaft of the first drive gear 130 is defined as the drive pivot fulcrum 116a of the operation link, and the support shaft of the second drive gear 134 is defined as the drive pivot fulcrum 118a of the posture assist link.

  The swing of the posture auxiliary link 118 is decelerated with respect to the swing of the operation link 116 by the gear mechanism 122. Specifically, at least one of the transmission gear 132 and the second drive gear 134 of the gear mechanism, for example, the second By using the drive gear as a reduction gear, the swing of the attitude assist link with respect to the swing of the operating link is decelerated.

  Here, by allowing the free pivot point (drive pivot point) 118a of the posture assist link to be movable with respect to the seat cushion 12, it is possible to guarantee the shift of the movement locus. Further, by restricting the movement path of the free pivot point 118a of the posture assisting link with respect to the seat cushion 12 by the seat cushion side guide hole 136, the movement of the seat cushion 12 until the seat back 14 is flipped forward due to the forward tilting of the seat back 14. A trajectory is obtained via forward movement from a backward tilted posture by lifting the front end.

  The movement path of the free pivot point 118a of the posture assisting link with respect to the seat cushion 12 is defined by a seat cushion side guide hole 136 provided in the seat cushion guide piece 138, and the guide hole extends in the vertical direction of the seat cushion. 136a and linear front and rear portions 136b extending rearward from the upper ends of the upper and lower portions.

  For example, when the operating link 116 and the posture assisting link 118 are synchronously interlocked by the forward movement (pushing) of the interlocking arm 42 accompanying the forward tilting of the seat back 14, the posture assisting link is decelerated and swung with respect to the operating link, and the guide link 136 By moving the free pivot point 118b of the posture assist link, as shown in FIG. 13, the seat cushion 12 takes a rearward tilted posture with its front end portion lifted.

  When the seat back 14 is further swung forward (forward), the seat cushion is moved by decelerating and swinging the posture auxiliary link 118 relative to the operation link 116 and moving the free pivot point 118b of the posture auxiliary link in the guide hole 136. 12 exhibits an overall lifting posture as shown in FIG. When the seat back 14 is further swung forward, the seat cushion 12 is flipped forward in an inverted state as shown in FIG.

  As can be seen from FIG. 15, the forward raising of the seat cushion 12 is completed in the initial stage of the forward movement of the seat back 14, and the forward movement of the seat back does not become an obstacle to the forward upward movement of the seat cushion. Then, after the seat cushion 12 is flipped forward, the seat back 14 is further tilted forward to form the loading platform of the vehicle seat 10 shown in FIG.

  The completion operation of the forward raising of the seat cushion 12 in the initial stage of the forward movement of the seat back 14 is obtained by the synchronous interlocking of the operation link 116 and the posture auxiliary link 118 by the gear mechanism 122, and the adjustment of the combination of gears and the gear ratio thereof. Thus, the initial range of the seat back advancement can be set appropriately.

  Further, as shown in FIGS. 14 and 15, the seat back alone can be moved forward after the front spring up of the seat cushion 12 is completed in the initial stage of the seat back 14 being moved forward. Then, the forward tilting of the seat back alone after the seat cushion 12 is flipped forward is secured by the guide hole (guide hole of the guide arm) 32a, the swing link 36, and the guide pin 39 on the seat back side.

  As described above, the intermediate portion of the main link 36M of the swing link is pivotally supported by the support shaft 18-2 of the rear bracket 18, and the rear end of the interlocking arm 42 is pivotally supported at one end (for example, the lower end) of the main link. The sub link guide pin 39 is inserted into the guide hole 34a of the guide plate and the guide hole 36c of the main link (see FIG. 4).

  As can be seen from FIGS. 4, 13, and 14, the seat is moved by sliding the guide pin 39 in a part (left half, rear half) 32aL of the guide hole 32a of the guide arm integral with the seat back. Interlocking of the swing link 36 (specifically, the main link 36M) and the interlocking arm 42 is obtained corresponding to the swing of the seat back 14 for raising the cushion forward. Then, as shown in FIG. 15, when the guide pin 39 moves out of the left half (second half) 32aL of the guide hole 32a of the guide arm and moves to another part (right half, front half) 32aR, the seat When the cushion 12 is flipped forward and the guide pin is guided and slid on the right half portion 32aR, the main link 36M is swung, that is, the seat back alone is not moved forward without the interlock arm 42 being pushed out. This is possible (see FIGS. 2 and 15).

  In this way, the seat cushion 12 is flipped forward in the initial stage of the forward movement of the seat back 14, and the movement path of the seat cushion until the forward movement of the seat back according to the forward movement of the seat back is tilted backward by lifting the front end. Going forward from That is, since the movement locus of the rear end of the seat cushion is ensured without approaching the seatback 14 that is tilted forward, interference between the seatback and the seat cushion 12 when the seat configuration is changed is prevented.

  As described above, according to the present invention, since the swing link is divided into the main link and the sub link that can swing, various and fine swings are possible. Then, a guide plate with a guide hole is fixed to the rear bracket, and a guide pin provided on the sub link is inserted into a guide hole provided on the swing link and a guide hole on the guide arm to guide to the guide hole on the fixed guide plate. Thus, the sliding of the main link in the direction in which the sub link is swung and the interlocking arm is pushed out is restricted by sliding, so that the seat back can be tilted backward and reclining can be set.

In addition, the biasing member between the main link and the sub link can easily generate various fine swings in the sub link, and the main link swings in the direction of pushing out the interlocking arm by bringing the main link into contact with the stopper. Can be reliably regulated.
Further, the main link has an arc-shaped long hole centered on the swing axis of the sub link, and the guide plate has an arc-shaped long hole centered on the swing axis (support shaft) of the main link. Therefore, the sub link can swing smoothly with respect to the main link and the main link with respect to the guide plate.

The above-described embodiments are for explaining the present invention, and are not intended to limit the present invention. All modifications, alterations, etc. within the technical scope of the present invention are included in the present invention. Needless to say.
For example, in the embodiment, the rear bracket 18 is provided with a stopper 18-1 that restricts the swinging of the main link 36M in the direction in which the interlocking arm 42 is pushed out. However, it is sufficient that the stopper 18-1 is provided on the fixing member, and the guide plate 34 is a fixing member provided on the rear bracket 18. Therefore, the stopper may be provided on the guide plate instead of the rear bracket.

  The present invention can be widely applied to a vehicle seat in which the seat cushion is flipped up (forward) in conjunction with the forward tilt of the seat back.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 12 Seat cushion 14 Seat back 18 Rear bracket 18-1 Stopper 18-2 Support shaft 20 Reclining device 22 Reclining shaft (common shaft)
32 guide arm 32a guide hole formed in the guide arm (guide hole of the guide arm)
32aR Guide hole front half (right half)
The latter half of the 32aL guide hole (left half)
34 Guide plate 34a Guide hole formed in the guide plate (guide hole of the guide plate)
34aR Front half of guide hole (right half)
The latter half of the 34aL guide hole (left half)
36 Swing link 36M Main link 36c Guide hole formed in main link (guide hole of main link)
36S sub link 39 guide pin 42 interlocking arm

Claims (3)

One end of a swing link that is connected to the seat bracket and pivotally supported by a rear bracket on the vehicle floor coaxially with the seat back, with a guide arm with one end connected to the seat back. The guide pin provided on the guide arm is inserted into the guide hole of the guide arm, one end of the interlocking arm is connected to the other end of the swinging link, the interlocking arm is pushed out in response to the swinging of the swinging link, and then pulled back. In the vehicle seat that moves the seat cushion between the sitting position and the front flip-up position in conjunction with the forward and backward movement of the
The reclining device is attached to the seat back coaxially with the guide arm,
A guide plate with a guide hole is fixed to the rear bracket,
The swing link is divided into a main link with a guide hole provided on the rear bracket so as to be swingable and a sub-link provided on the main link so as to be swingable.
The interlocking arm is connected to one end of the main link, and the guide pin is provided in the sub link and is inserted into the guide hole of the guide arm through the guide hole of the main link and the guide hole of the guide plate,
When the seat back is tilted backward by sliding the guide pin guided by the guide hole of the main link and the guide hole of the guide plate, the sub link is swung with respect to the main link and the interlock arm is pushed out. A vehicle seat characterized by restricting the swing of the main link at the vehicle. A biasing member is installed between the main link and the sub link, and the guide pin is pressed against one end of the guide hole of the main link to regulate the swing of the sub link with respect to the main link.
The vehicle seat according to claim 1, wherein a stopper is provided, and the main link is brought into contact with the stopper to restrict the swinging of the main link in a direction in which the interlocking arm is pushed out. The guide hole of the main link is formed as an arc-shaped long hole centering on the swing axis of the sub link,
The guide hole of the guide plate is formed from an arc-shaped long hole centered on the rocking axis of the main link and an arc-shaped long hole continuous with the latter part and centering on the rocking axis of the sub link. Formed from the first half and
The guide hole of the guide arm includes a rear half portion formed of an arc-shaped long hole centering on a common axis with the reclining device, and a front half portion formed of a long hole continuous with the rear half portion and allowing the guide arm to tilt backward. The vehicle seat according to claim 1 or 2, wherein the vehicle seat is formed.

Images