JP2006347463A - Vehicle seat structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle seat structure capable of facilitating the forward folding operation of a seatback. <P>SOLUTION: A hooking part 13 located in an area below the line A connecting a pivot 5 to support a seatback 3 to an operation unit 20 is provided on a seatback 3, and a wire 10 for connecting a locking mechanism 4 to the operation unit 20 is wound around the hooking part 13. By pulling the operation unit 20, the locking of the seatback 3 by the locking mechanism 4 is unlocked, and the rotational moment around the pivot 5 is given to the seatback 3 to forwardly collapse the seatback 3, and the forward folding of the seatback 3 is completed in one operation. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle seat structure used for a vehicle such as an automobile.

2. Description of the Related Art Conventionally, there is a vehicle seat structure that includes a seat back that can be moved forward from a seating position (see, for example, Patent Document 1). In this vehicle seat structure, the seat back is locked by the lock mechanism at the seating position. A lock release knob is connected to the lock mechanism, and the lock of the seat back by the lock mechanism can be released by operating the lock release knob.
Japanese Patent No. 3099367

  In such a vehicle seat structure, in order to move the seat back forward, the operator first performs an unlocking operation. This operation is an operation of operating the lock release knob to unlock the seat back by the lock mechanism. After unlocking the seat back in this way, the tilting operation is performed. This operation is an operation of pushing the seat back forward by hand. Thus, the conventional vehicle seat structure has a problem that it is troublesome because two operations must be performed to move the seat forward.

  An object of the present invention is to obtain a vehicle seat structure in which a seat back can be moved forward more easily.

  The present invention includes a lock mechanism that locks a seat back in a seating position, an operation unit that is disposed behind the seat back and that is operated to unlock the lock mechanism, the support shaft, and the operation unit. A hook part provided in the seat back in a region below the line connecting the hooks and a hook part that extends from the lock mechanism to the rear of the seat back through the hook part. And a connecting member that connects the lock mechanism and the operation part, and by pulling the operation part, the lock mechanism is unlocked and the seat back is centered on the support shaft The most important feature is that the seat back is moved forward by applying a rotational moment.

  According to the present invention, in a region below the line connecting the support shaft and the operation portion, the connection member that connects the lock mechanism and the operation portion is hung around the hook portion provided in the seat back. By pulling the operation part, the lock mechanism can be unlocked and the seat back can be given a rotational moment about the support shaft, so the seat back can be moved forward with only one operation of pulling the operation part. The seat back can be moved forward more easily.

  An embodiment of the present invention will be described with reference to the drawings. This embodiment is an example of a vehicle seat structure applied to a rear seat of an automobile. FIG. 1 is a side view showing a vehicle seat structure according to the present embodiment, FIG. 2 is a side view showing a state in which the lock mechanism for the seat back according to the present embodiment is released, and FIG. 3 is the present embodiment. It is a top view which shows the link mechanism concerning.

  As shown in FIGS. 1 and 2, the rear seat 1 includes a seat cushion 2 disposed on the floor 6 at the rear of the vehicle interior, and a seat back 3 disposed behind the seat cushion 2. The seat back 3 is provided so as to be able to be tilted forward from a seating position (FIG. 1) in an upright state, and is locked by the lock mechanism 4 at the seating position. Here, in this embodiment, the seating position is set to a position inclined backward by a predetermined angle with respect to the seat cushion 2.

  Specifically, the seat back 3 has a seating position (FIG. 1) by a support shaft 5 provided in the lower part of the seat back 3 so as to extend in the vehicle width direction, and a lying position where the seat back 3 overlaps the seat cushion 2. (The one-dot chain line in FIG. 2) is provided on the floor 6 so as to be freely rotatable. Thereby, the seat back 3 can be moved forward from the seating position through a forward tilt position (a two-dot chain line in FIG. 2) that is forward tilted from the seating position. Here, the seat back 3 is brought into a state where the seat back 3 can be moved forward around the rotation center 5 a that is the axis of the support shaft 5 when the lock mechanism 4 is unlocked.

  The lock mechanism 4 includes a vehicle body side engaging member 7 and a seat side engaging member 8. The vehicle body side engaging member 7 is a striker, and is fixed to a rear parcel 18 as a vehicle body so as to face the rear upper part of the seat back 3 located at the seating position.

  The seat side engaging member 8 is formed in a hook shape and is disposed on the upper portion of the seat back 3. The seat side engaging member 8 is engaged with the vehicle body side engaging member 7 in an engaged position (FIG. 1) where the seat back 3 is positioned at the seating position and engaged with the vehicle body side engaging member 7. The position is freely displaceable between the released position (the solid line in FIG. 2) and is biased toward the engaged position by a spring (not shown). Then, when the seat back 3 is located at the seating position, the seat side engaging member 8 is engaged with the vehicle body side engaging member 7 by urging by a spring (not shown), and the seat back 3 is locked at the seating position. To do. Further, when the seat side engaging member 8 is displaced to the release position from this state, the seat side engaging member 8 is disengaged from the vehicle body side engaging member 7, and the seat back by the seat side engaging member 8 is released. 3 is released.

  A release mechanism 9 for displacing the seat-side engagement member 8 to release the lock on the seat back 3 is connected to the seat-side engagement member 8.

  The release mechanism 9 includes an operation unit 20 disposed outside the seat back 3 and behind the seat back 3, a wire 10 that is a connecting member that connects the seat side engagement member 8 and the operation unit 20, And a hook portion 13 around which the wire 10 is wound.

  The operation unit 20 includes a release strap 12 that is an operation piece, and a link mechanism 11. The release strap 12 is formed so as to be gripped, and is pulled to release the lock of the seat back 3 by the seat side engaging member 8. In this embodiment, the release strap 12 protrudes into the luggage compartment 100 via the cargo compartment floor 19.

  The wire 10 can be bent and deformed. One end 10 a of the wire 10 is connected to the seat-side engaging member 8, and the other end 10 b is connected to the release strap 12 via the link mechanism 11.

  The hanging portion 13 is formed in a shaft shape, and is provided on the seat back 3 in a region below the line A connecting the support shaft 5 and the fulcrum of the release strap 12 with respect to the rotation center 5a of the seat back 3. ing.

  The wire 10 is wound around the hook 13 in an arrangement extending from the seat-side engaging member 8 to the rear of the seat back 3 via the hook 13.

  As shown in FIG. 1, the link mechanism 11 is disposed outside the seat back 3 and behind the seat back 3.

  As shown in FIG. 3, the link mechanism 11 has a main arm member 14, and the main arm member 14 is swingably provided on a bracket 15 fixed to the floor 6. A first sub arm member 16 is swingably provided at the free end of the main arm member 14. The release strap 12 is connected to the free end portion of the first sub arm member 16. A second sub arm member 17 is connected to a portion of the main arm member 14 between the connecting portion with the bracket 15 and the connecting portion with the first sub arm member 16. The wire 10 is connected to the free end portion of the second sub arm member 17.

  In such a configuration, when the release strap 12 is pulled behind the seat back 3 by the operator in the luggage compartment 100, the wire 10 is pulled by the release strap 12 via the link mechanism 11. As a result, the wire 10 displaces the seat-side engagement member 8 from the engagement position to the release position against the urging force of a spring (not shown) of the lock mechanism 4, so that the seat-side engagement with the vehicle body-side engagement member 7 is achieved. The member 8 is disengaged, and the lock by the seat side engaging member 8 with respect to the seat back 3 is released (FIG. 2). At this time, the wire 10 applies a rotational moment to the seat back 3 in the forward direction of the seat back 3 around the rotation center 5a. The seat back 3 is moved forward by the rotational moment generated by the wire 10.

  Here, the pulling force of the release strap 12 applied by the operator is F, the distance between the rotation center 5a of the seat back 3 and the axis of the hook 13 is L, and the swing center of the main arm member 14 in the link mechanism 11 The distance between the swing center of the first sub arm member 16 and the swing center of the first sub arm member 16 is a, the distance between the swing center of the main arm member 14 and the swing center of the second sub arm member 17 is b, and the wire 10 is applied to the seat back 3. M = F · L · a / b where M is the rotational moment.

  As described above, in the present embodiment, the lock mechanism 4 and the operation unit are connected to the hook 13 provided in the seat back 3 in a region below the line A connecting the support shaft 5 and the operation unit 20. By pulling the release strap 12 of the operation unit 20 by the configuration in which the wire 10 that connects the wire 20 is hung, the lock mechanism 4 is unlocked and the rotational moment about the support shaft 5 is applied to the seat back 3. Since the lock on the seat back 3 is released and the seat back 3 is moved forward by only one operation of pulling the release strap 12 of the operation unit 20, the unlocking operation can be performed to move the seat back forward. Compared to the conventional structure that requires two operations, the tilting operation, the seatback 3 can be moved forward more easily. Can.

  As described above, in the present embodiment, since the forward operation of the seat back 3 can be performed by one operation, for example, a compression spring that urges the seat back forward is provided at the connecting portion between the seat cushion and the seat back. When the lock on the seat back is released, the compression spring is released and the structure of the vehicle seat structure is suppressed from being complicated compared to the structure in which the seat back is moved forward, and thus the cost and weight of the vehicle seat structure are suppressed. Can be suppressed. In addition, in this configuration in which the compression spring is provided to release the lock on the seat back, the released compression spring must be in a compressed state when the seat back is returned from the forward tilt position to the seating position. However, in the present embodiment, since such a compression spring is not provided, the operation force required to return the seat back from the forward tilt position to the seating position is increased. Can be suppressed.

  Further, in the present embodiment, the link mechanism 11 is interposed between the release strap 12 and the wire 10, so that the seat back 3 can be adjusted by setting the arm ratio (distance a / distance b) of the link mechanism 11. The force F required to move forward can be reduced as compared with the case where the link mechanism 11 is not provided.

  In the present embodiment, the link mechanism 11 is installed outside the seat back 3, so that the degree of freedom of the arrangement position of the release strap 12 is expanded. Therefore, the release strap 12 can be arranged according to the structure of the vehicle.

  The present invention is not limited to this embodiment, and various other embodiments can be adopted without departing from the gist of the present invention.

1 is a side view showing a vehicle seat structure according to an embodiment of the present invention. It is a side view which shows the state which cancelled | released the lock | rock by the locking mechanism with respect to the seat back of this invention. It is a top view which shows the link mechanism concerning one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Seat back 4 Lock mechanism 5 Support shaft 7 Car body side engaging member 8 Seat side engaging member 10 Wire (connection member)
11 Link mechanism 12 Release strap (operation piece)
13 hanging part 20 operation part

Claims (4)

A vehicle seat structure having a seat back provided so as to be able to be moved forward from a seating position by a support shaft,
A lock mechanism for locking the seat back to a seating position;
An operation unit disposed behind the seat back and operated to unlock the locking mechanism;
In a region below a line connecting the support shaft and the operation unit, a hanging unit provided in the seat back,
A connecting member that is hooked around the hook portion in an arrangement extending from the lock mechanism to the rear of the seat back via the hook portion, and connects the lock mechanism and the operation portion;
With
By pulling the operation portion, the lock mechanism is unlocked, and a rotational moment about the support shaft is applied to the seat back, so that the seat back is tilted forward. Construction. The lock mechanism is provided on the vehicle body side engaging member projecting from the vehicle body to the rear seat back side, and is provided on the seat back so as to be detachable from the vehicle body side engaging member, and is engaged with the vehicle body side engaging member. A seat-side engagement member that locks the seat back in the seating position by,
2. The lock of the seat back is released by releasing the engagement of the seat side engagement member with the vehicle body side engagement member by pulling the operation portion. Vehicle seat structure. The operation unit is
An operation piece;
A link mechanism interposed between the operation piece and the connecting member;
The vehicle seat structure according to claim 1, wherein the vehicle seat structure is provided. 4. The vehicle seat structure according to claim 3, wherein the link mechanism is installed outside the seat back.

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