JP2003159149A - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle seat which can securely support a plane shape body and give desired support feeling by external force regardless of the posture of a sitting user. <P>SOLUTION: This vehicle seat has a seat-back 2 to be the backrest for a sitting user constituted by equipping at least a seat-back frame 5 with an opening 6 at the center and a plane shape body 14 elastically placed on the seat-back frame 5 to cover the opening 6 of the seat-back frame 5. The plane shape body 14 is pivotally supported longitudinally movable on an almost middle part in the vertical direction of the plane shape body 14 by a hinge mechanism 19. An air mat 29 with controllable inflation volume is placed by the hinge mechanism 19 of the plane shape body 14 onto the upper or lower front side to enable the plane shape body to be pushed out forward. <P>COPYRIGHT: (C)2003,JPO

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 backrest structure thereof.

[0002]

2. Description of the Related Art For example, as shown in FIG. 10, as a conventional seat back 30 for a vehicle seat, a seat back frame 32 having an opening 31 in the center, and the opening 31 of the seat back frame 32 are covered. The seat back frame 32 is provided with at least a planar member 34 elastically arranged by a coil spring 33 and a connecting member 36, and a support member 35 bridged to the planar member 34, so that a seated person Seat back 30 for backrest
It consists of. The support 35 holds the back of the seated person softly, and the coil spring 33 acts on the upper part of the planar body 34 to move the back of the seated person back and forth, thereby increasing the stroke feeling. As a similar technique, there is JP-A-8-299103.

[0003]

However, in such a conventional technique, since the sheet-like body 34 is suspended by the coil spring 33, there is no sense of stability and it is stably supported by the occupant. It may not be possible to give the feeling of being.

The present invention has been made by paying attention to such a conventional technique, so that a planar body can be reliably supported so that a desired support feeling can be obtained by an external force regardless of the posture of the seat occupant. The vehicle seat is provided.

[0005]

According to a first aspect of the present invention, there is provided a seat back frame having an opening in the center, the seat back frame is covered with the opening, and is elastically arranged on the seat back frame. A vehicle seat comprising at least a sheet and a seat back which serves as a seat back of a occupant, wherein the sheet is provided with a hinge mechanism at a substantially middle portion in the vertical direction of the sheet. Is axially movably supported, and an air mat whose expansion amount is controllable is arranged on the front side above or below the hinge mechanism of the planar body so that the planar body can be pushed forward. It is a thing.

According to the first aspect of the present invention, since the hinge mechanism is provided substantially at the central portion in the vertical direction of the planar body that is least affected by the back of the seated person, the planar body can be securely held. Therefore, the seated person can be surely held. Moreover, by controlling the expansion amount of the air mat arranged on the upper side or the lower front side of the planar body, the seated person can be held with a desired support feeling.

According to a second aspect of the present invention, at least a seat back frame having an opening in the center and a sheet-like body covering the opening of the seat back frame and elastically arranged on the seat back frame are provided. By preparing,
In a vehicle seat that constitutes a seat back that serves as a seat back of a seated person, a frame body formed in substantially the same shape as the planar body is arranged behind the planar body, and An upper end portion of the frame body is rotatably supported by upper portions of both side portions of the seat back frame so as to be movable back and forth, and is elastically arranged on the seat back frame. The hinge mechanism axially supports the planar body so that the planar body can be moved back and forth, and an air mat whose expansion amount can be controlled is arranged on the front side above or below the hinge mechanism of the planar body. The sheet-shaped body can be extruded to the front side.

According to the second aspect of the present invention, by controlling the expansion amount of the air mat which is arranged above or below the hinge mechanism of the planar body for holding the back of the seated person, the surface of the air mat is controlled. The body flexes together with the frame, and the seated person can be held with a desired support feeling.

A third aspect of the present invention is the vehicle seat according to the first or second aspect, wherein the air mat is provided with a controller for supplying and exhausting air at predetermined time intervals. Become.

According to the invention of claim 3, claim 1
Alternatively, in addition to the effect of the second aspect, fatigue can be reduced by moving the posture surface of the air mat in front of the planar body at every predetermined time.

A fourth aspect of the invention is the vehicle seat according to the first or second aspect, wherein the air mat is provided with a switch for appropriately supplying and discharging air.

According to the invention of claim 4, claim 1
Alternatively, in addition to the effect of claim 2, fatigue can be reduced because the posture surface of the air mat in front of the sheet can be moved by appropriately turning on a switch.

The invention according to claim 5 is the vehicle seat according to any one of claims 1 to 4.
The planar body is curved rearward from the upper side to the vertical center position and curved frontward from the vertical center position to the lower side.

According to the invention of claim 5, claim 1
In addition to the effect of any one of claims 4 to 4, since the planar body is curved rearward from the upper side to the upper and lower central positions, and is curved frontward from the upper and lower central position to the lower side, It becomes a shape that follows the curve of the back of the person and makes it easy for the seated person to back.

The invention according to claim 6 is the vehicle seat according to any one of claims 1 to 5.
The hinge mechanism is formed integrally with the planar body.

According to the invention of claim 6, claim 1
In addition to the effect of any one of claims 5 to 5, since the hinge mechanism can be simultaneously formed at the time of forming the planar body, the manufacturing cost can be reduced.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. In the following description, FR is the front side, RR is the rear side, UP is the upper side, and LWR is the lower side.

FIGS. 1 and 2 show a first embodiment of the present invention. Reference numeral 1 is a vehicle seat as a "vehicle", which is composed of a seat back 2 and a seat cushion 3.

The seat back frame 5 constituting the seat back 2 is provided between the side frames 10, 10 made of symmetrical iron plates arranged on both sides and the upper end portions 10a, 10a of the side frames 10, 10. An upper cross member 11 made of an iron plate, which is installed in a substantially horizontal shape and has a substantially U-shaped cross section, and the lower end portions 1 of the side frames 10 and 10.
0b and 10b are formed in a substantially rectangular frame shape from a panel frame including a lower cross member 12 made of an iron plate which is installed substantially horizontally. A pipe formed by bending the pipe into a substantially rectangular frame shape. It may be formed of a frame. An opening 6 is formed in the center of the seat back frame 5 when viewed from the front (FIG. 1). The side frames 10 and 10, the upper cross member 11, and the lower cross member 12 are supported by a welding GW to form a square shape. In the upper cross member 11,
As shown in FIG. 1, a through hole 24 for a holder bracket of a headrest stay (not shown) is formed in a left-right pair so as to vertically penetrate therethrough.

The opening 6 of the seat back frame 5
At this position, the sheet-like body 14 that covers the opening 6 from the front side and is elastically arranged on the side frames 10, 10 of the seat back frame 5 by the first spring 13
And a support 15 formed by crosslinking the planar body 14.

The planar member 14 is formed of a member having rigidity, and is formed, for example, in a rectangular closed loop shape when the hollow pipe is viewed from the front. The size has a lateral width of the back of the seated occupant and a vertical width from the shoulder to the hip. The support 15 is a plurality of steel wires provided inside the planar body 14 at appropriate intervals, but may be an S-shaped spring or a panel. The first spring 13
Is a coil wound around the side frame 10
The upper and lower portions of a hinge mechanism 19 to be described later on the side portion 14a of the planar body 14 are elastically bridged to the left and right, respectively, but are not limited to coil springs, and are spring materials having a restoring force. May be It may be a panel-shaped body in which the planar body 14 and the support body 15 are integrated.

A hinge mechanism 19 pivotally supports the planar body 14 so as to be movable back and forth at a substantially middle portion in the vertical direction of the planar body 14. Since the air mat 29 is arranged at the upper side UP of the hinge mechanism 19, when the air mat 29 is inflated, the well-known pad of the seat back 2 arranged on the front side FR of the air mat 29 causes the air mat to be formed. The upper portion 14b of the planar body 14 holding 29 is moved to the rear side RR, and the lower portion 14c of the planar body 14 is moved to the front side F.
Since it can be pushed out to the R, the waist of the seated person can be securely held. The air mat 29 is held by a clip 29a on the upper portion 14b of the planar body 14 and the support 15 of the upper side UP of the hinge mechanism 19. Further, the air mat 29 is provided with a controller (not shown) for supplying / exhausting air every predetermined time or a switch for appropriately supplying / exhausting air.

Also, the side portions 14a, 14 of the planar member 14
As shown in FIG. 2, a is curved from the upper part 14b of the upper side UP to the upper and lower center position by an arc centered on the front side FR to the rear side RR and from the upper and lower center position to the lower part 14c of the lower side LWR. By being curved toward the front side FR by an arc centered on the rear side RR, it is curved and formed in a substantially S shape when viewed from the side.

The hinge mechanism 19 is welded to the first bracket 25 fixed to both side portions 14a, 14a of the planar body 14 and the side frames 10, 10 by a welding GW.
And a caulking pin 27 which is inserted into and supported by the through holes of the first and second brackets 25 and 26.

Next, the operation according to the first embodiment will be described.

Since the hinge mechanism 19 is provided at substantially the central portion in the vertical direction of the sheet-like body 14 which is least affected by the back of the seated person, the sheet-like body 14 is held securely and the seated person is held securely. I can. In addition, the front side F of the upper side UP of the planar body 14
By controlling the expansion amount of the air mat 29 arranged on the R, the well-known pad of the seat back 2 arranged on the front side FR of the air mat 29 is substantially stopped at that position so that the air mat 29 is reacted by the reaction. The upper portion 14b of the held planar body 14 is moved to the rear RR, and the lower portion 14c of the planar body 14 is moved to the front FR with the hinge mechanism 19 as the center.
It is possible to give the seated person a desired feeling of support by extruding into the seat. In addition, the sheet-like body 14 that holds the waist of the seated person
The stroke feeling can be increased, and the waist of the seated person can be held with a desired support feeling in accordance with the posture of the seated person.
Further, even when the user is seated with the front shifted, the lumbar region of the seated person can be securely held, and the lumbar vertebrae and pelvis can be firmly held.

Further, in the sheet member 14, the side portion 14a extends from the upper portion 14b of the upper UP to the upper and lower central positions, and the rear portion RR is located on the rear side RR.
Since it is curved to the front side FR from the upper and lower center position to the lower portion 14c of the lower LWR, it becomes a shape that follows the curve of the back of the seated person, and the seated person can easily lean back.

In the above-described embodiment, the hinge mechanism 19 includes the first and second hinges that are separate from the planar body 14 and the side frame 10.
Although it has been described that the bracket 25, 26,
The present invention is not limited to this, and may be integrally formed with the planar body 14 and the side frame 10. In such a case, the hinge mechanism can be molded at the same time when the planar body 14 and the side frame 10 are molded. Therefore, the manufacturing cost becomes low.

FIGS. 3 and 4 show a second embodiment of the present invention. The main difference from the first embodiment is the position where an air mat is provided. Therefore, only the points different from the first embodiment will be described.

Reference numeral 40 denotes the air mat of the second embodiment, which is arranged at the lower LWR position of the hinge mechanism 19 so that when the air mat 40 is inflated, the waist of the occupant is seated by the air mat 40. The air mat 4 is provided by a well-known pad of the seatback 2 which has a supporting lumbar effect and is arranged on the front side FR of the air mat 40.
Since the lower portion 14c of the planar body 14 holding 0 is moved to the rear side RR and the upper portion 14b of the planar body 14 can be pushed out to the front side FR, the upper body of the seated person can be retained. The air mat 40 includes a lower portion 14 of the sheet 14.
c and a clip 40a on the support 15 of the LWR below the hinge mechanism 19. Further, the air mat 40 is provided with a controller (not shown) for supplying / exhausting air at predetermined time intervals or a switch for appropriately supplying / exhausting air.

According to the second embodiment, the air mat 40 has the lumbar effect of supporting the lumbar region of the seated person, and the upper portion 14b of the sheet 14 is pushed out to the front side FR, so that the upper half of the seated person can be held. .

FIGS. 5 to 7 show a third embodiment of the present invention. The main difference from the first embodiment is that the planar body holding the air mat is rotatably attached to the seat back. It is supported by a frame that is supported.

The opening 6 of the seat back frame 5
At the position, a frame-shaped planar member 14 which covers the opening 6 from the front side and is elastically arranged by the first spring 13 on the side frames 10, 10 of the seat back frame 5, and the planar member. And a support 15 formed by crosslinking with 14.

The planar member 14 is formed of a member having rigidity, for example, a hollow closed pipe in a rectangular shape when the hollow pipe is viewed from the front side. It has a vertical width from the shoulders to the hips. The support 15 is a plurality of steel wires provided inside the planar body 14 at appropriate intervals, but may be an S-shaped spring or a panel. The first spring 13 is wound in a coil shape, and is elastically bridged to the left and right portions between the side frame 10 and the upper portion of the side portion 14a of the planar body 14, respectively. The spring material is not limited to the spring, and may be a spring material having a restoring force. The spring material is not limited to one location on the left and right, and a plurality of materials may be used.

On the rear side RR of the sheet-like body 14, a frame body 16 having a substantially U-shape is arranged, although the sheet-like body 14 has a closed loop shape but has a substantially U-shape. It becomes. The frame 16 is substantially U-shaped as described above when viewed from the front.
The upper end portion 16a of the seat back frame 5 is bent outward to project and is pivotally supported by a bracket 17 disposed inside the upper portions 10a of the side frames 10, 10 of the seat back frame 5 so as to be movable back and forth. It becomes. Frame body 1 at a position immediately below LWR and a lowermost end position of a hinge mechanism 19, which will be described later.
Second springs 18, 18 are arranged between the side portions 16b of the seat back frame 5 and the wire-shaped beam members 28 installed inside the lower portions 10b of the side frames 10, 10 of the seat back frame 5, respectively. Thus, the frame body 16 is elastically arranged with respect to the seat back frame 5. The second spring 18 is wound in a coil shape, but is not limited to a coil spring, and may be a spring material having a restoring force. The number is not limited to two and may be plural. The support state of the frame body 16 changes variously depending on the strength and number of the second springs 18.

A hinge mechanism 19 pivotally supports the planar body 14 so that the planar body 14 can be moved back and forth at a substantially middle portion in the vertical direction of the frame body 16. The hinge mechanism 19 includes the planar body 1
4, a first bracket 25 fixed to an intermediate portion of both side portions 14a, 14a, and both side portions 16b, 16b of the frame body 16.
Second bracket 26 fixed to the intermediate portion of the first through second through holes 25a, 26a of the first and second brackets 25, 26.
It is composed of a caulking pin 27 which is inserted into and supported by.

Further, the side portions 14a, 14 of the planar body 14 are
a is curved from the upper part 14b of the upper side UP to the upper and lower center position to the rear side RR by an arc centered on the front side FR and from the upper and lower center position to the lower part 14 of the lower side LWR.
A circular arc centered on the rear RR extends to the front F
By being curved to R, it is curved and formed in a substantially S shape when viewed from the side.

Further, since the air mat 29 is arranged at the position of the upper side UP of the hinge mechanism 19, when the air mat 29 is inflated, the seat back 2 arranged on the front side FR of the air mat 29 is arranged. The upper portion 14b of the planar body 14 holding the air matt 29 is moved to the rear side RR by a well-known pad, and the lower portion 14c of the planar body 14 is moved to the front side F.
Since it can be pushed out to the R, the waist of the seated person can be securely held. The air mat 29 is held by a clip 29a on the upper portion 14b of the planar body 14 and the support 15 of the upper side UP of the hinge mechanism 19. Further, the air mat 29 is provided with a controller (not shown) for supplying / exhausting air every predetermined time or a switch for appropriately supplying / exhausting air.

Next, the operation according to this embodiment will be described.

Since the hinge mechanism 19 is provided substantially vertically in the central portion of the sheet-like body 14 which is least affected by the back of the seated person, the sheet-like body 14 is held securely and the seated person is held securely. I can. In addition, the front side F of the upper side UP of the planar body 14
By controlling the expansion amount of the air mat 29 arranged on the R, the well-known pad of the seat back 2 arranged on the front side FR of the air mat 29 is substantially stopped at that position so that the air mat 29 is reacted by the reaction. The upper portion 14b of the held planar body 14 is moved to the rear RR, and the lower portion 14c of the planar body 14 is moved to the front FR with the hinge mechanism 19 as the center.
It is possible to give the seated person a desired feeling of support by extruding into the seat. Moreover, since the hinge mechanism 19 is supported by the frame body 16 that can be bent toward the rear side RR, the lower portion 14c of the planar body 14 has a soft protruding feeling, so that it is softly held by a woman or the like. Further, it is possible to increase the stroke feeling of the sheet-shaped body 14 that holds the waist of the seated person, and to hold the waist of the seated person with a desired support feeling in accordance with the posture of the seated person. Further, even when the user is seated with the front shifted, the lumbar region of the seated person can be securely held, and the lumbar vertebrae and pelvis can be firmly held.

Further, in the sheet member 14, the side portion 14a extends from the upper portion 14b of the upper side UP to the central position in the vertical direction and the rear side RR.
Since it is curved to the front side FR from the upper and lower center position to the lower portion 14c of the lower LWR, it becomes a shape that follows the curve of the back of the seated person, and the seated person can easily lean back.

In the above-described embodiment, the hinge mechanism 19 is described as comprising the first and second brackets 25 and 26 which are separate from the planar body 14 and the frame body 16, but the invention is not limited to this. Alternatively, it may be formed integrally with the planar body 14 and the frame body 16. In such a case, since the hinge mechanism 19 can be molded at the same time when the planar body 14 and the frame body 16 are molded, the manufacturing cost is low. become.

8 and 9 show a fourth embodiment of the present invention, and the main difference from the third embodiment is the position where an air mat is provided. Therefore, only the points different from the third embodiment will be described.

Reference numeral 40 denotes the air mat of the fourth embodiment, which is arranged at the position of the lower side LWR of the hinge mechanism 19 so that when the air mat 40 is inflated, the waist of the occupant is seated by the air mat 40. The air mat 4 is provided by a well-known pad of the seatback 2 which has a supporting lumbar effect and is arranged on the front side FR of the air mat 40.
Since the lower portion 14c of the planar body 14 holding 0 is moved to the rear side RR and the upper portion 14b of the planar body 14 can be pushed out to the front side FR, the upper body of the seated person can be retained. The air mat 40 includes a lower portion 14 of the sheet 14.
c and a clip 40a on the support 15 of the LWR below the hinge mechanism 19. Further, the air mat 40 is provided with a controller (not shown) for supplying / exhausting air at predetermined time intervals or a switch for appropriately supplying / exhausting air.

According to the fourth embodiment, the air mat 40 has the lumbar effect of supporting the lumbar region of the seated person, and the upper portion 14b of the planar member 14 is pushed out to the front side FR, whereby the upper half of the seated person can be held. .

[0046]

According to the first aspect of the present invention, since the hinge mechanism is provided substantially at the central portion in the vertical direction of the planar body that is least affected by the back of the seated person, the planar body can be reliably The seated person can be securely held. Moreover, by controlling the expansion amount of the air mat arranged on the upper side or the lower front side of the planar body, the seated person can be held with a desired support feeling.

According to the second aspect of the present invention, by controlling the expansion amount of the air mat arranged on the front side above or below the hinge mechanism of the sheet-like body for holding the back of the seated person, the surface is controlled. The body flexes together with the frame, and the seated person can be held with a desired support feeling.

According to the invention of claim 3, claim 1
Alternatively, in addition to the effect of the second aspect, fatigue can be reduced by moving the posture surface of the air mat in front of the planar body at every predetermined time.

According to the invention of claim 4, claim 1
Alternatively, in addition to the effect of claim 2, fatigue can be reduced because the posture surface of the air mat in front of the sheet can be moved by appropriately turning on a switch.

According to the invention of claim 5, claim 1
In addition to the effect of any one of claims 4 to 4, since the planar body is curved rearward from the upper side to the upper and lower central positions, and is curved frontward from the upper and lower central position to the lower side, It becomes a shape that follows the curve of the back of the person and makes it easy for the seated person to back.

According to the invention of claim 6, claim 1
In addition to the effect of any one of claims 5 to 5, since the hinge mechanism can be simultaneously formed at the time of forming the planar body, the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front view showing a seat back frame according to a first embodiment of the present invention.

FIG. 2 is a side view of the seat back frame shown in FIG.

FIG. 3 is a front view showing a seat back frame according to a second embodiment of the present invention.

FIG. 4 is a side view of the seat back frame shown in FIG.

FIG. 5 is a front view showing a seat back frame according to a third embodiment of the present invention.

6 is a side view of the seat back frame of FIG.

7 is an exploded perspective view of the hinge mechanism of FIG.

FIG. 8 is a front view showing a seat back frame according to a fourth embodiment of the present invention.

9 is a side view of the seat back frame of FIG.

FIG. 10 is a perspective view of a conventional seat back frame.

[Explanation of symbols]

1 Car seat (vehicle seat) 2 seat back 5 seat back frame 6 openings 13 1st spring 14 Planes 14a Sides of sheet 14b Top of sheet 14c Lower part of sheet 15 Support 16 frame 18 Second spring 19 Hinge mechanism 29,40 Air mat FR front side RR rear side UP upper side LWR lower side

Claims (6)

[Claims] 1. A seatback frame comprising at least a seatback frame having a central opening and a sheet-like body which covers the opening of the seatback frame and is elastically arranged on the seatback frame. In a vehicle seat that constitutes a seat back that serves as a backrest, a hinge mechanism rotatably supports the planar body in a back-and-forth direction approximately at an intermediate portion in the vertical direction of the planar body. On the front side above or below the hinge mechanism of the body,
A vehicle seat characterized in that an air mat whose expansion amount can be controlled is arranged so that the sheet can be pushed forward. 2. A seat back frame having at least a seat back frame and a sheet-like body that covers the seat back frame opening and is elastically arranged on the seat back frame. In a vehicle seat comprising a seat back as a backrest, a frame body formed in substantially the same shape as the planar body is arranged on the rear side of the planar body, and The upper end is
The seat back frame is rotatably supported on the upper portions of both side portions of the seat back frame and is elastically arranged on the seat back frame. A hinge mechanism is provided at a substantially middle portion in the vertical direction of the frame body. The planar body is axially supported so as to be movable back and forth, and on the front side above or below the hinge mechanism of the planar body,
A vehicle seat characterized in that an air mat whose expansion amount can be controlled is arranged so that the sheet can be pushed forward. 3. The vehicle seat according to claim 1, wherein the air mat is provided with a controller that supplies and exhausts air at predetermined time intervals. Sheet. 4. The vehicle seat according to claim 1 or 2, wherein the air mat is provided with a switch for appropriately supplying and discharging air. 5. The vehicle seat according to any one of claims 1 to 4, wherein the planar body is curved rearward from an upper side to an upper and lower central position, and an upper and lower central position. The vehicle seat is characterized in that it is curved from the front side to the lower side. 6. The vehicle seat according to any one of claims 1 to 5, wherein the hinge mechanism is formed integrally with the planar body. Sheet.