JP2000071822A - Seat structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a survival space for an occupant sitting in a driver seat and a front-passenger seat respectively, and protect the chest of the occupant in case of side collision of a vehicle. SOLUTION: This structure is formed out of a handle part which consists of a dial 7 also serving as a load input part, a reclining gear projection 8 transmitting the rotation of the dial 7, and a stopper gear protrusion 15 preventing the rotation of the dial 7, and a handle supporting part which consists of a reclining gear recess 9 receiving rotation input from the handle part, a stopper gear recess 16 preventing the rotation of the dial 7, a gearing 10 jointed to the seat frame of a seat cushion side member, a gear wheel 11 jointed to the back frame of a seat back side member, a spring 14, a retainer 13, and bearing 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat for protecting a occupant's chest while securing a living space for an occupant seated in a driver's seat and a front passenger's seat in a side collision of a vehicle. Regarding the structure.

[0002]

2. Description of the Related Art In a conventional vehicle seat structure, an occupant space can be generally secured even when an impact force enters a vehicle interior from a side surface of a vehicle such as a door in a side collision of the vehicle.
For example, there is one disclosed in Japanese Utility Model Laid-Open No. 03-26652.

[0003]

However, such a conventional vehicle seat structure does not take into account the seatback reclining operation of the seat, and is not easy to use. Further, these conventional vehicle seat structures can transmit an impact load from the collision side to the opposite side during a side collision and can secure a living space for the occupant, but do not consider protection of the occupant's chest. As an occupant chest protection device, for example, there is a device disclosed in Japanese Patent Application Laid-Open No. 09-272394. However, considering protection of an occupant in a side collision, both securing of a living space and protection of the chest are desired. In order to simultaneously achieve the above, there have been problems that the mechanism becomes complicated, a plurality of systems are required, and costs increase. The present invention has been made in view of such a conventional problem, and enables a reclining operation of a seat back, and in the event of a side collision of a vehicle, the impact load is transmitted to the opposite side quickly and reliably. The above problem is solved by providing a vehicle seat structure that secures the occupant's living space and moves the side support portion of the seat cushion between the side of the vehicle and the occupant to cushion the impact on the occupant's chest. It is intended to be.

[0004]

According to a first aspect of the present invention, there is provided a vehicle seat structure in which a seat back tilts at a rear end portion of a seat cushion of a driver seat and a passenger seat which are vehicle seats. A reclining mechanism that supports an angle adjustment; and a high-rigidity reinforcing member that extends in the vehicle width direction and is installed inside at least one of a rear end side of a seat cushion of the driver's seat and a passenger seat and a base end side of a seat back. A load input portion extending in the vehicle front-rear and up-down directions in the axial direction of the reinforcing member, and also serving as a recliner handle function, wherein the reclining mechanism comprises a plurality of handles arranged in the vehicle width direction. The joint portion has a cylindrical shape and is fitted by gears, and the handle portion and the hand support portion are formed. At least one gear of the support portion has a spiral shape, the handle portion or the handle support portion has a concave shape rotatable toward the vehicle interior in the vehicle width direction, and the handle portion moves to the vehicle interior side in the vehicle width direction. It is characterized by having a rotation preventing mechanism for stopping rotation at the time. The vehicle seat structure according to claim 2 is the vehicle seat structure according to claim 1,
As the rotation preventing mechanism, a friction material is disposed on a side surface of the load input portion, which is a part of the handle portion, on the side of the vehicle. According to a third aspect of the present invention, in the vehicle seat structure according to the first aspect of the present invention, as the rotation preventing mechanism, an engaging portion extending in a vehicle width direction on a handle portion and an engaging portion disposed on a reclining mechanism on a seat cushion side. Are offset from each other in the vehicle width direction. According to a fourth aspect of the present invention, there is provided a vehicle seat structure according to the first aspect, wherein an energy absorbing member is provided in a hollow portion provided in an engaging portion of the handle portion or the handle support portion.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. <First Embodiment> FIGS. 1 to 9 show a first embodiment of the present invention. First, the configuration will be described. As shown in FIGS. 1 to 6, the reclining device 1 includes a dial 7 also serving as a load input unit, a reclining gear projection 8 for transmitting rotation of the dial 7, and a stopper gear for preventing rotation of the dial 7. A handle portion comprising a projection 15 and a reclining gear recess 9 for receiving a rotation input from the handle portion
A gear ring 10 joined to the seat frame 4 of the seat cushion side member, a gear wheel 11 joined to the back frame 3 of the seat back side member, a spring 14, a retainer 1
3 and a handle support portion including a bearing 12. Reference numeral 2 denotes a reinforcing member for transmitting the load from the reclining device 1 to the opposite side. The tip of the reclining gear protrusion 8 of the handle portion and the reclining gear recess 9 of the handle support portion have a gear shape and are fitted by a taper shape. Further, the portion other than the tip of the reclining gear projection 8 has the shape of a spiral gear, and has a projection 8a near the engaging portion. The reclining gear recess 9 has a recess 9a.

Next, the operation will be described (FIGS. 7 to 12).
In the reclining mechanism, when the dial 7 is rotated, the rotation of the reclining gear protrusion 8 is transmitted to the reclining gear recess 9, and the back frame 3 is rotated via the retainer 13 (FIG. 7). The handle portion and the handle support portion have a sufficient engagement force such that relative movement due to external force applied during normal reclining work does not occur due to the fitting of the reclining gear protrusion 8 and the reclining gear recess 9 due to the tapered shape and the projection 8a. . In the event of an excessive impact generated at the time of a side collision, the dial 7 also serving as a load input unit moves toward the passenger compartment in the vehicle width direction, and the projection 8a provided on the reclining gear projection 8 is broken, resulting in the shape of a spiral gear. The dial 7 is guided and moves toward the vehicle interior in the vehicle width direction while rotating. Thereafter, when the stopper gear projections 15 and the stopper gear recesses 16, which are the dial 7 rotation preventing mechanisms arranged offset in the vehicle width direction, are fitted by the movement of the dial 7, the rotation of the dial 7 stops.

However, since the dial 7 moves toward the passenger compartment in the vehicle width direction due to the impact from the side, the reclining gear recess 9 starts rotating due to the spiral shape provided on the reclining gear projection 8. This rotation is the retainer 13
, The seat back 5 is moved forward, and the side support 6 is moved between the side of the vehicle and the occupant to cushion the impact (FIGS. 8, 10, and 1).
1, FIG. 12). The direction of rotation of the back frame 3 is determined by the helix direction provided on the reclining gear projection 8, but the helix shape is such that the back frame 3 moves forward in the vehicle at the time of a side collision. When the reclining gear projection 8 interferes with the interior of the reclining gear recess 9, the rotational movement ends, and the impact load is greatly transmitted to the reinforcing member 2, thereby securing a living space for the occupant (FIG. 9).

<Second Embodiment> A second embodiment will be described below. 13 and 14 are diagrams illustrating the second embodiment.
This embodiment has the same configuration as the first embodiment,
As the dial 7 rotation preventing mechanism, the stopper gear protrusion 15 and the stopper gear recess 16 are eliminated, and a friction material 17 is joined to the dial 7 on the vehicle side surface instead. Therefore, the present embodiment has the same operation as that of the first embodiment, and moves the side support 6 between the vehicle side surface and the occupant at the time of a side collision to buffer the shock, and transmits the shock load to the reinforcing member 2, Secure crew living space.

Third Embodiment FIGS. 15 and 16 show a third embodiment. The present embodiment has the same configuration as that of the first embodiment, however, the stopper gear recesses 15a and the projections of the stopper gears 15 and 16 in which the stopper gears 15 and 16 forming the rotation preventing mechanism of the dial 7 in the first embodiment are reversed. 16a is provided. Therefore, the present embodiment has the same operation as that of the first embodiment, and moves the side support 6 between the vehicle side surface and the occupant at the time of a side collision to buffer the shock, and transmits the shock load to the reinforcing member 2, Secure crew living space.

<Fourth Embodiment> FIGS. 17 and 18 show a fourth embodiment. This embodiment has the same configuration as that of the first embodiment. However, the reclining gear projection 8 and the reclining gear recess 9 in the first embodiment are reversed to integrate the reclining gear projection 8 and the stopper gear projection 15. Reclining gear integrated stopper gear convex 1
5b, a concave portion 8b is provided in the reclining gear integrated stopper gear projection 15b, and the reclining gear projection 9b can rotate the dial 7 by the axial movement of the dial 7. Therefore, the present embodiment has the same operation as that of the first embodiment, and moves the side support 6 between the vehicle side surface and the occupant at the time of a side collision to buffer the shock, and transmits the shock load to the reinforcing member 2, Secure crew living space.

Fifth Embodiment FIGS. 19 and 20 show a fifth embodiment. This embodiment has the same configuration as that of the first embodiment, except that an energy absorbing member 18 is provided in a concave portion 9 a provided in the reclining gear concave portion 9. Therefore, the present embodiment has the same operation as that of the first embodiment, and moves the side support 6 between the vehicle side surface and the occupant at the time of a side collision to buffer the shock, and transmits the shock load to the reinforcing member 2, Secure crew living space. further,
Energy can be absorbed while the dial 7 is rotating and moving at the time of a side collision.

[0012]

As described above, according to the present invention, it is possible to adjust the tilt angle of the seat back at the rear ends of the seat cushions of the driver's seat and the passenger seat, which are the vehicle seats. A supporting reclining mechanism, a high-rigidity reinforcing member that extends inside the vehicle width direction and is installed at least on one of a rear end side of the seat cushion of the driver seat and the passenger seat and a base end side of the seatback; A load input portion extending in the vehicle front-rear and vertical directions in the axial direction, and also serving as a recliner handle function, wherein the reclining mechanism includes a handle portion and a handle support portion arranged in the vehicle width direction. This joint has a cylindrical shape and is fitted by gears, and at least a handle portion and a handle support portion are provided. One of the gears has a helical shape, the handle portion or the handle support portion has a concave shape capable of rotating to the vehicle interior side in the vehicle width direction, and rotates when the handle portion moves to the vehicle interior side in the vehicle width direction. With the anti-rotation mechanism to stop, in the event of a side collision of the vehicle, it is possible to secure the living space for the driver who is the vehicle seat and the occupant seated in the front passenger seat and at the same time to protect the occupant's chest. Can be

[Brief description of the drawings]

FIG. 1 is an exploded view of the first embodiment.

FIG. 2 is a schematic diagram showing the first embodiment.

FIG. 3 is a perspective view showing the first embodiment.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a partially enlarged view of FIG. 4;

FIG. 6 is a sectional view taken along line BB of FIG. 5;

FIG. 7 is a sectional view taken along the line AA of FIG. 3 showing the operation of the first embodiment.

FIG. 8 is a sectional view taken along the line AA of FIG. 3, showing the operation of the first embodiment.

FIG. 9 is a sectional view taken along the line AA of FIG. 3 showing the operation of the first embodiment.

FIG. 10 is a diagram showing the operation of the first embodiment.

FIG. 11 is a diagram showing the operation of the first embodiment.

FIG. 12 is a diagram showing the operation of the first embodiment.

FIG. 13 is a perspective view showing a vehicle seat structure according to a second embodiment.

FIG. 14 is an exploded view of the second embodiment.

FIG. 15 is a perspective view showing a vehicle seat structure according to a third embodiment.

16 is a sectional view taken along the line CC of FIG.

FIG. 17 is a perspective view showing a vehicle seat structure according to a fourth embodiment.

18 is a sectional view taken along line DD of FIG. 17;

FIG. 19 is a perspective view showing a vehicle seat structure according to a fifth embodiment.

20 is a sectional view taken along the line EE of FIG. 19;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 reclining device 2 reinforcing member 3 back frame 4 seat frame 5 seat back 6 side support 7 dial 8 reclining gear projection 8a projection 8b recess 9 reclining gear recess 9a recess 9b reclining gear projection 10 gear ring 11 gear wheel 12 bearing 13 retainer 14 spring 15 Stopper gear convex 15a Stopper gear concave 15b Reclining gear integrated type stopper gear convex 16 Stopper gear concave 16a Stopper gear convex 17 Friction material 18 Energy absorption member 19 Collision vehicle 20 Occupant

Claims (4)

[Claims] 1. A reclining mechanism that supports a tilt angle of a seat back at a rear end portion of a seat cushion of a driver seat and a passenger seat, which are vehicle seats; At least one of the end side and the base end side of the seat back, a high-rigidity reinforcing member that extends inside the vehicle in the vehicle width direction and extends in the vehicle front-rear direction and the vertical direction in the axial direction of the reinforcing member, and has a recliner handle function. In the vehicle dial type reclining seat structure comprising a load input portion serving also as a vehicle, the reclining mechanism comprises a handle portion and a handle support portion arranged in the vehicle width direction, and these joint portions have a cylindrical shape and are fitted by gears. And at least one of the gears of the handle portion and the handle support portion has a helical shape, and The vehicle is characterized in that the handle support has a concave shape rotatable toward the vehicle interior in the vehicle width direction, and has a rotation prevention mechanism for stopping rotation when the handle moves to the vehicle interior in the vehicle width direction. Sheet structure. 2. The vehicle seat structure according to claim 1, wherein a friction material is disposed on the side of the vehicle of a load input portion, which is a part of the handle portion, as the rotation preventing mechanism. 3. An anti-rotation mechanism, wherein an engaging portion extending in the vehicle width direction on the handle portion and an engaging portion provided on the reclining mechanism on the seat cushion side are offset from each other in the vehicle width direction. The vehicle seat structure according to claim 1, wherein: 4. The vehicle seat structure according to claim 1, wherein an energy absorbing member is provided in a hollow portion provided in the engaging portion of the handle portion or the handle support portion.