JPH0725278A - Mounting structure of automobile seat - Google Patents

Abstract

PURPOSE:To reconcile an improvement in sit-down comfortableness in a seat cushion and a check to forward movement of a sitter at the time of a head-on collision. CONSTITUTION:When a seat cushion 2 is moved forward by the frontal clash of a car, a connecting point between a second link member 8 and a third link member 9 of a seat lift guide mechanism 6 slides forward on a guide slope part 15 of a rear panel, whereby a first link member 7 and the second link member 8 both are made to rise up, having a front part of the seat cushion 2 lifted up, so that any forward movement of the hip part of a sitter and the seat cushion is thus checked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat, and more particularly to a seat cushion mounting structure for a rear seat.

[0002]

2. Description of the Related Art A seat cushion for a rear seat of an automobile is detachably fixed on a rear floor panel through a locking member. When a frontal collision of the vehicle occurs, a seat belt is worn to the seat cushion through a seated person. When a large input force is applied to the front side, the locking member may be disengaged and the seat cushion may move forward inertially together with the seated person.

Therefore, in order to prevent such a forward movement of the seat cushion, for example, as shown in Japanese Utility Model Publication No. 5-18199, a protrusion is formed on the rear floor panel below the front portion of the seat cushion. On the other hand, the seat cushion has a recess for receiving this protrusion,
It is known that the projection controls the forward movement of the seat cushion.

[0004]

When it is attempted to restrict the forward movement of the seat cushion by the projection formed on the rear floor panel as described above, the projection amount of the projection should be adjusted in order to surely prevent this forward movement. On the other hand, the concave portion of the front portion of the seat cushion needs to have a large molding depth in order to receive the projection portion having a large amount of protrusion, and the thickness of the front portion of the seat cushion becomes thin.

When the thickness of the front portion of the seat cushion is reduced in this way, the front portion of the seat cushion approaches the hip point and the thigh of the seated person is positioned, so that the seated person is given a feeling of protrusion and sits down. It causes a problem that makes us feel uncomfortable.

Therefore, in the normal state, the seating comfort can be improved without giving the seated person a slight sense of protrusion or discomfort, and the seat cushion and the seated person can be surely moved forward in the case of a frontal collision of the vehicle. The present invention provides a vehicle seat mounting structure that can be regulated.

[0007]

Means for Solving the Problems At least below a sitting position of a seat cushion fixed on a floor panel,
The first link member and the second link member connected to the first link member are arranged below the front half of the seat cushion, and the second link member is below the rear half of the seat cushion. A third link member connected to the link member is arranged to hinge the front end of the first link member to the floor panel below the front end of the seat cushion, while the rear end of the third link member is below the rear end of the seat cushion. A seat lift guide mechanism including the first link member, the second link member, and the third link member is fixed to the edge, and a connection point between the second link member and the third link member is provided on the floor panel. A guide slope portion is formed that is gently inclined forward and obliquely upward with the vicinity as a base point.

[0008]

When the front cushion of a vehicle receives a large forward force on a seat cushion through a seated person wearing a seatbelt and the seat cushion moves forward, the second link member of the seat lift guide mechanism and the 3 The connecting point with the link member slides forward on the guide slope,
Using the hinge connection point at the front end of the first link member as a fulcrum, the first link member and the second link member stand up with their connecting points as vertices, and lift up the front portion of the seat cushion.

As a result, the first link member and the second link member that have risen up serve as stoppers to reliably prevent the hip portion of the seated person and the seat cushion from moving forward.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a rear seat consisting of a seat cushion 2 and a seat back 3. The seat cushion 2 is fixed on a rear floor panel 4 at the rear portion of the floor panel via a locking member (not shown). The seat back 3 leans against and supports the seat support panel 5,
It is fixed by a locking member (not shown).

Reference numeral 6 denotes a seat lift guide mechanism disposed below the seating position of the seat cushion 2 and between the rear floor panel 4 and a first link member 7 and a second link 10 connected to the first link member 7 by a hinge 10. It is composed of a link member 8 and a third link member 9 connected to the second link member 8 by a hinge 11.

The first link member 7 and the second link member 8 are
The seat cushion 2 is arranged substantially below the front half of the hip point (HP), and the third link member 9 is arranged substantially below the rear half of the seat cushion 1.

The front end of the first link member 7 is connected to the corner portion of the rear floor panel 4 with the rising wall 4a below the front end of the seat cushion 2 via a hinge member 12, while the third link member 9 is connected. The rear end of the seat cushion 2 is attached to the shape retaining frame 13 at the lower end of the rear end of the seat cushion 2 by a bracket 14.
It is fixed through.

As the first link member 7, the second link member 8 and the third link member 9, it is possible to use a plate made of resin or metal, or a frame body made of pipe material, bar material or the like.

On the other hand, the rear floor panel 4 has the second
A guide slope portion 15 that is gently inclined forward and obliquely upward is formed with a vicinity of a hinge 11 connection point between the link member 8 and the third link member 9 as a base point.

In this embodiment, the hinge 1 between the first link member 7 and the second link member 8 is located in front of the guide slope portion 15.
The first link member 7 and the second link member 8 are arranged along this mountain shape by forming a low mountain shape by inclining downward with the portion corresponding to the 0 connection point as the apex. The second link member 8 is made to easily stand up.

According to the structure of the above-described embodiment, a large frontward force is applied to the seat cushion 2 via the seated person P wearing a seat belt at the time of a frontal collision of the vehicle, and the locking member (not shown) is released. When the seat cushion 2 moves forward, the connecting point of the hinge 11 between the second link member 8 and the third link member 9 of the seat lift guide mechanism 6 slides forward on the guide slope portion 15.

As a result, as shown in FIG. 2, the hinge point of the hinge member 12 at the front end of the first link member 7 is used as a fulcrum, and the first link member 7 and the second link member 8 are connected to their hinges 10. Stands up and lifts up the front part of the seat cushion 2.

As a result, the first link member 7 and the second link member 8 that have risen up serve as stoppers to reliably prevent the hip portion Pa of the seated person P and the seat cushion 2 from moving forward.

Here, the seat lift guide mechanism 6 is the first
The link member 7, the second link member 8 and the third link member 9 are formed as a chain body and are arranged substantially flat along the surface of the rear floor panel 4, and the guide slope portion 15 of the rear floor panel 4 is gently inclined. Since it is formed as a surface, there is almost no upward protrusion even in the front portion of the seat cushion 2 in the normal state, and the front portion of the seat cushion 2 can have a sufficient thickness, so that the seated person can be projected. There is no feeling of discomfort and discomfort, and the sitting comfort can be improved.

[0022]

As described above, according to the present invention, the seat lift guide mechanism is composed of the first link member, the second link member, and the third link member, and is substantially below the seat cushion along the floor panel. Since it is arranged flat and the guide slope part of the floor panel is formed as a gentle slope, there is almost no upward projection even in the front part of the seat cushion in the normal state, and the seat Since the front portion of the cushion can be made sufficiently thick, the sitting comfort can be improved without giving the seated person a feeling of protrusion and a feeling of strangeness.

When a frontal collision of the vehicle occurs, the connecting point between the second link member and the third link member slides forward on the guide slope portion by a large input acting on the seat cushion forward, and the first link member. And the second link member are raised, and the first link member and the second link member surely prevent forward movement of the seat occupant's hip and the seat cushion to ensure safety, and the seat cushion is comfortable to sit on. It is possible to achieve both the improvement of the above and the prevention of the forward movement of the seated person at the time of a frontal collision.

[Brief description of drawings]

FIG. 1 is a sectional explanatory view showing an embodiment of the present invention.

FIG. 2 is a schematic explanatory view showing an operation mode of the embodiment.

[Explanation of symbols]

 2 ... Seat cushion 4 ... Rear floor panel (floor panel) 6 ... Seat lift guide mechanism 7 ... First link member 8 ... Second link member 9 ... Third link member 15 ... Guide slope part

Claims (1)

[Claims] 1. A first cushion is provided at least below a seating position of a seat cushion fixed on a floor panel and below a front half of a front portion of a hip point of the seat cushion.
The link member and the second link member connected to the first link member are arranged, and the third link member connected to the second link member is arranged below the substantially rear half of the seat cushion. The front end of the link member is hingedly connected to the floor panel below the front end of the seat cushion, while the rear end of the third link member is fixed to the lower end of the rear end of the seat cushion, and the first link member, the second link member, A guide that constitutes a seat lift guide mechanism including a third link member, and that gently inclines forward and obliquely upward with the vicinity of the connection point between the second link member and the third link member as a base point on the floor panel An attachment structure for an automobile seat, characterized in that a slope portion is formed.