JP4516490B2 - Sheet - Google Patents

Description

  The present invention relates to a seat, and more particularly, to a seat for an automobile in which a support point of a seated person is not easily changed.

  Conventionally, in order to obtain an appropriate feeling of support, a seat capable of automatically optimizing the support for the back in accordance with the physique of a sitting person has been disclosed (for example, see Patent Document 1). Focusing on the fact that the seat becomes larger as the seated person's physique grows, the seat back moves in the downward and forward / backward directions as the seat seat surface is displaced downward. Is.

As shown in FIG. 6A, for example, the seat S ′ includes a pair of left and right link members 8 ′ and 8 having a rear end of the seat cushion receiving member 3 ′ and a lower end of the back cushion receiving member 6 ′. It is connected with ′. In this case, as shown in FIG. 6B, as the seat cushion receiving member 3 'moves downward, the back cushion receiving member 6' moves obliquely forward and downward, and the support for the back is automatically adjusted. The
JP 2002-78561 A (paragraphs 0008 to 0009)

However, in the technique described in Patent Document 1, the back cushion receiving member moves diagonally forward and downward with respect to the downward movement of the seat cushion receiving member due to the vibration of the human body, and the downward moving amount becomes small. The phenomenon that the support point on the back of the human body shifts due to the difference in the downward movement amount occurs.
Also, the angle of the link member differs depending on the reclining angle, etc., and the ratio of the amount of movement of the seat back in the vertical direction and the amount of movement in the front-rear direction changes, causing a phenomenon that the support point of the back of the human body shifts. .

  The present invention has been made in view of such a background, and it is an object of the present invention to provide a seat in which a support point with respect to movement due to vibration of a human body and the like is small and the reclining angle can be adjusted smoothly. .

In order to solve the above-mentioned problems, a seat according to the present invention includes a seat part having a seat cushion and a backrest part having a back cushion, and a cushion frame serving as a skeleton of the seat part, and a spring on the cushion frame. A seat cushion receiving member elastically supported so as to be movable in the vertical direction and the horizontal direction through the back frame, a back frame serving as a skeleton of the backrest portion rotatably connected to the cushion frame via a reclining shaft, and the back A back cushion receiving member that is elastically supported by a frame so as to be movable in a vertical direction and a horizontal direction via a spring, and the back cushion is fixed to cover the shape of the back frame. Side support part and the bag located inside the side support part. And the center support portion fixed to the cushion receiving member is divided into one rigid body rotatably connects the lower end of the rear end of the seat cushion receiving member back cushion receiving member only in one axis of rotation And a rotating member that is aligned with the reclining shaft.

According to the present invention, the connecting member comprising a single rigid body, by rotating freely connecting the lower end of the rear end and the back cushion receiving member of the seat cushion receiving member only in one axis of rotation, due to the vibrations of the human body Since the downward displacement of the seat cushion receiving member is directly transmitted to the back cushion receiving member, the downward movement amount of the seat cushion receiving member and the downward movement amount of the back cushion receiving member are the same, and the relative positions of the two The relationship can be maintained, and the support point is less likely to fluctuate with respect to movement due to vibrations of the human body.

  Further, the back cushion receiving member that holds the back cushion of the backrest portion is elastically supported by the cushion frame, so that the back cushion receiving member can be smoothly moved downward, and the back cushion against the movement of the seat cushion receiving member can be achieved. The followability of the receiving member can be improved.

  And since the rotation fulcrum of the back frame coincides with the rotation fulcrum of the seat back receiving member by aligning the rotation axis of the connecting member with the reclining axis, the back frame and the seat back can be adjusted even if the reclining angle is adjusted. The positional relationship with the receiving member does not vary, and a smooth reclining operation is possible.

In the above-described invention, the connecting member includes a first connecting portion fixedly connected to the seat cushion receiving member, and a second connecting portion connected to the back cushion receiving member and the rotation shaft so as to freely rotate. It is desirable.
According to this configuration, in the connecting member, the seat seat surface of the seat is provided by providing a difference in height between the reclining shaft and the seat cushion receiving member in a state where the rotation shaft of the second connecting portion is aligned with the reclining shaft. It is possible to arrange the height at a suitable position.

  According to the seat according to the present invention, it is possible to provide a seat in which the support point is less fluctuated with respect to movement due to vibrations of the human body and the reclining angle can be adjusted smoothly.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the drawings to be referred to, FIG. 1 is a perspective view showing the appearance of an automobile seat according to an embodiment of the present invention, and FIG. 2 is an exploded view for explaining the overall configuration of the automobile seat according to the embodiment of the present invention. 3 is a perspective view, FIG. 3 is an enlarged perspective view of a main part of FIG. 2, and FIG. 4 is a side view of an automobile seat according to an embodiment of the present invention. And FIG. 5 is explanatory drawing for demonstrating the effect | action of the vehicle seat which concerns on embodiment of this invention, (a) shows the state at the time of normal, (b) shows the state at the time of reclining, c) shows a state in which the seat cushion receiving member has moved downward due to the vibration of the traveling vehicle.

As shown in FIG. 1, the vehicle seat S according to this embodiment includes a seat C and a backrest B, and is fixed to a vehicle interior floor (not shown) via a seat rail SR. . As shown in FIG. 2, the seat C includes a cushion frame 1 serving as a skeleton, a seat cushion 2 placed on the cushion frame 1, and a seat cushion receiving member 3 that supports the seat cushion 2. The backrest B includes a back frame 4 serving as a skeleton, a back cushion 5 placed on the back frame 4, a back cushion receiving member 6 that supports the back cushion 5, a seat cushion receiving member 3, and a back cushion receiving member 6 And a connecting member 8 for connecting the two.
In this embodiment, the backrest B is that is divided back cushion 5 is a side support portion 51 and the center support portion 52 (see FIG. 1).

  As shown in FIG. 2, the cushion frame 1 serves as a skeleton of the seat C and is fixed to the seat rail SR. The cushion frame 1 has a window frame shape with a large central portion, and cushion side frames 11 and 11 are provided on the left and right sides so as to extend in the front-rear direction. And the rear end of the cushion side frames 11 and 11 and the lower end of the back frame 4 to be described later are connected so that the angle of the backrest B can be adjusted around the reclining shaft 9.

  The seat cushion 2 includes a sponge-like pad (not shown) and a skin covering the surface of the pad, and supports the buttocks of a person who sits down. The seat cushion 2 is fixed to the cushion frame 1 with a clip or the like (not shown), and a central portion 2a (see FIG. 1) of the seat cushion 2 is placed on a seat cushion receiving member 3 whose bottom is elastically supported by the cushion frame 1. Has been. The pad is formed of a cushion member such as foamed urethane resin, and the surface thereof is covered with a skin such as moquette or leather.

As shown in FIG. 3, the seat cushion receiving member 3 includes four S-shaped springs 31 a, 31 a, 31 b, and 31 b, and a B-shaped wire 32 that couples the S-shaped springs 31 a, 31 a, 31 b, and 31 b, And a connecting spring 33 for connecting the B-shaped wire 32 to the cushion frame 1 (see FIG. 2).
The seat cushion receiving member 3 is configured by arranging S-shaped springs 31a and 31b having different lengths formed of steel wires so as to form a continuous S-shape in plan view, side by side, across the front and rear of the cushion frame 1. Yes. Specifically, short S-shaped springs 31a and 31a are arranged on the outside, and long S-shaped springs 31b and 31b are arranged on the inside, and the front end side of each S-shaped spring 31a, 31a, 31b and 31b is The ends of the S-shaped springs 31a, 31a, 31b, and 31b are joined to the front frame 12 by aligning the ends, and the rear ends of the S-shaped springs 31a, 31a, 31b, and 31b are joined to the square-shaped wires 32 by crimping the ends.
In addition, in this embodiment, although the S-shaped spring combined the thing from which length differs, it is not limited to this, The same length may be sufficient.

The square-shaped wire 32 is formed in a substantially rectangular ring shape in a plan view in which a central portion 32a on one side of the rear end protrudes backward, and one side of the rear-shaped side of the square-shaped wire 32 and each S-shaped spring 31a. , 31a, 31b, 31b are aligned with the rear end of the seat cushion receiving member 3 so as to surround the rear half of the seat cushion receiving member 3 (the position of the buttocks of the seated person) and are coupled to the S-springs 31a, 31a, 31b, 31b. ing. A central portion 32 a on one side of the rear end side of the square-shaped wire 32 is caulked to the rear frame 13.
A coil spring is used as the connection spring 33, and the front end of the coil spring 33 is engaged with the corner portion 32b on the rear end side of the B-shaped wire 32 and connected to the rear frame 13 facing the rear end. The cushion receiving member 3 is elastically supported by the cushion frame 1.
In the present embodiment, the central portion 32a on one side of the rear end side of the square-shaped wire 32 is coupled to the rear frame 13, but the present invention is not limited to this and may be coupled by a coil spring. It does not have to be connected. That is, how to fix the square-shaped wire 32 to the rear frame 13 is appropriately determined in consideration of the use of the seat, spring rigidity, and the like.

As shown in FIG. 2, the backrest part B includes a back frame 4 serving as a skeleton thereof. The back frame 4 has a window frame shape with a large central portion, and left and right side frames 41 and 41, and a U-shaped upper frame 42 that opens downward and connects the upper portions of the side frames 41 and 41. The lower frame 43 that connects the lower portions of the side frames 41 and 41 is provided.
Further, the back frame 4 and the cushion frame 1 are coupled with the reclining shaft 9 as a center so that the reclining angle of the backrest portion B can be adjusted. Specifically, the lower ends of the left and right side frames 41, 41 in the back frame 4 and the rear ends of the cushion side frames 11, 11 are rotatably connected around the reclining shaft 9.

As shown in FIG. 2, the back cushion 5 is placed on the back frame 4 and supports the back of the person sitting. The back cushion 5 is divided into a side support portion 51 and a center support portion 52 (see FIG. 1).
The side support 51 includes a pad and an outer skin (not shown), is formed in an inverted U shape along the shape of the side frames 41 and 41 of the back frame 4 and the upper frame 42, and covers the back frame (41, 41, 42). Is fixed.
The center support portion 52 includes a cushion portion 521 composed of a pad and an outer skin, and a back panel 522 formed of a resin that supports the back surface of the cushion portion 521, and is mounted so as to fit inside the side support portion 51. At the same time, it is fixed to a back cushion receiving member 6 elastically supported by the back frame 4 (see FIG. 1). Therefore, the center support portion 52 can be slid in the vertical direction independently of the side support portion 51.
As shown in FIG. 4, the center support portion 52 has an inverted S-shaped cross-sectional shape so that it can favorably support from the upper part of the back of the seated person to the lower part of the lumbar spine. The shape of the support point P2 can be adjusted (see FIG. 1).

As shown in FIG. 3, the back cushion receiving member 6 is formed by bending a steel wire into a gourd shape. A back panel mounting piece 6a is provided at the lower end of the back cushion receiving member 6 and attached to the side frame 41 on both sides of the lower portion. A hook 6b is provided.
The back cushion receiving member 6 is connected to the left and right side frames 41 via a coil spring 61 and elastically supported (see FIG. 2). Specifically, coil springs 61, 61 are arranged at facing positions on the left and right side frames 41, 41, the two coil springs 61, 61 are connected by a link 61a, and a back cushion receiver is received by the link 61a. The upper part of the member 6 is locked and elastically supported. At the lower part of the left and right side frames 41, 41, one end of the coil springs 61, 61 is engaged with the left and right hooks 6 b provided at the lower part of the back cushion receiving member 6, and the other end is connected to the side frames 41, 41. Thus, the lower portion of the back cushion receiving member 6 is elastically supported.

  A back panel 522 is attached to the back cushion receiving member 6 (see FIGS. 1 and 2). Specifically, the lower portion 522a of the back panel 522 is screwed to the back panel mounting piece 6a provided at the lower end of the back cushion receiving member 6, and the upper portion 6c of the back cushion receiving member 6 is the back surface of the back panel 522. The cross-section formed in this is inserted into the opening 522c of the U-shaped mounting boss 522b and positioned in contact with the upper wall 522d.

As shown in FIG. 3, the connecting member 8 is formed of a plate-like member, the upper second connecting portion 82 extends horizontally, and two legs 8a, 8a opened in a C shape from both ends extend downward. The lower portions of the legs 8a, 8a form first connecting portions 81, 81.
The connecting member 8 connects the rear end of the seat cushion receiving member 3 and the lower end of the back cushion receiving member 6, and the first connecting portions 81, 81 with the seat cushion receiving member 3 are firmly connected, and the back cushion receiving member 6 is connected. The second connecting portion 82 is connected to be freely rotatable. And the connection member 8 is arrange | positioned so that the 2nd connection part 82 may match with the reclining shaft 9 (refer FIG. 2).
Specifically, the first connecting portions 81, 81 are connected to one side of the rear end side of the rectangular hollow wire 32 of the seat cushion receiving member 3 and the lower ends of the two legs 8 a, 8 a of the connecting member 8. The second connecting portion 82 is curled at the upper end portion of the connecting member 8 in a downward U-groove shape, and the steel wire at the lower end of the back cushion receiving member 6 is wound inside the curl to be rotatably connected. ing. The back cushion receiving member 6 is locked to the back frame 4 by the coil spring 61, so that the position of the second connecting portion 82 of the connecting member 8 is aligned with the reclining shaft 9.

The operation of the vehicle seat S configured as described above will be described with reference to FIGS.
In the vehicle seat S according to the present embodiment, the seat cushion receiving member 3 includes S-shaped springs 31 a, 31 a, 31 b, 31 b, a square-shaped wire 32, and a coil spring 33. Elastically supported. By being elastically supported in this manner, the seat cushion receiving member 3 can move elastically in the vertical direction and the horizontal direction. Further, the connecting member 8 is fixedly connected to the square-shaped wire 32 (first coupling portion), and the square-shaped wire 32 reinforces the seat cushion receiving member 3 and also has a function as a torsion spring. Then, a restoring force in the rotational direction is applied to the connecting member 8.

According to this configuration, for example, when the human body moves downward due to vibration during traveling of the automobile, the seat cushion receiving member 3 also moves downward. At this time, since the first connecting portion 81 is fixedly connected in the connecting member 8, the connecting member 8 also moves downward integrally with the seat cushion receiving member 3 in conjunction with the downward movement of the seat cushion receiving member 3. To do. Similarly, the back cushion receiving member 6 is also elastically supported by the back frame 4 by the coil springs 61, 61, 61, 61, and thus smoothly moves downward in conjunction with the downward movement of the connecting member 8. (FIG. 5 (a), (c)).
For this reason, the back cushion receiving member 6 is also displaced while maintaining the relative positional relationship in conjunction with the displacement of the seat cushion receiving member 3, and the positional relationship between the support point P1 of the buttocks and the support point P1 of the waist varies. The vibration can be absorbed without any problem (see FIG. 4), and the supportability is not impaired. In addition, since the support points P1 and P2 do not deviate from the body, the sitting person does not feel uncomfortable and can improve riding comfort.
Here, the vibration of the human body due to the vibration of the automobile is assumed to be downward as an example, but the same applies to the horizontal direction and the rotation direction.

In the present embodiment, the back cushion 5 is divided into a side support part 51 and a center support part 52, and the side support part 51 is fixed to the back frame 4, so that the center support part 52 is a seat cushion holder. Following the movement of the member 3, it can move independently of the side support portion 51. Therefore, the center support portion 52 can follow the lower movement of the seat cushion receiving member 3 more smoothly .

  Further, during the reclining, the back cushion receiving member 6 and the back cushion 5 supported by the back frame 4 are also rotated along with the rotation of the back frame 4 around the reclining shaft 9. At this time, the back cushion receiving member 6 rotates about the second connecting portion 82 of the connecting member 8, but the reclining shaft 9 that is the rotating shaft of the back frame 4 and the rotating shaft of the back cushion receiving member 6. Since the rotation axis of the second connecting portion 82 is coincident, a smooth reclining operation is possible (FIG. 5B).

  Further, in the present embodiment, the seat cushion receiving member 3 and the back cushion receiving member 6 are connected by the connecting member 8, and between the seat cushion receiving member and the second connecting portion (reclining shaft 9) of the connecting member 8. There is a difference in height. Therefore, when the seat cushion 2 is placed on the seat cushion receiving member 3, a comfortable reclining state can be formed by aligning the seat surface of the seat with the reclining shaft 9.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be implemented with appropriate modifications.
For example, in the present embodiment, the rotation axis of the second connecting portion is aligned with the reclining axis in a state where no person is sitting, but the present invention is not limited to this. You may match the rotating shaft of 2 connection parts with a reclining shaft. According to such a configuration, a smoother operation is ensured when reclining while a person is sitting.
In addition, when a person's sitting state is used as a reference, there are various factors such as a person's weight and physique, but it can be set as appropriate depending on the country where the seat is used, the use of an automobile, and the like.

  In this embodiment, the seat cushion receiving member and the back cushion receiving member are connected via a connecting member, but the present invention is not limited to this, and the rear end of the seat cushion receiving member and the back cushion receiving member are directly connected. The lower end of each may be rotatably connected by a single hinge pin.

  Further, in the present embodiment, the seat cushion receiving member has a structure in which a square-shaped wire is coupled to an S-shaped spring and itself has elasticity, but the present invention is not limited thereto, and the seat cushion receiving member is not limited thereto. The member may be a resin plate or the like, and may be connected to the cushion frame with a member having elasticity such as an elastic spring. The shape of the wire is also a square shape in the present embodiment, but is not limited to this. In short, it is only necessary that the seat cushion receiving member can elastically follow the vibration of the seat. The same applies to the case where the back cushion receiving member is elastically supported by the back frame.

It is a perspective view showing appearance of a car seat concerning an embodiment of the present invention. It is a disassembled perspective view for demonstrating the whole structure of the vehicle seat which concerns on embodiment of this invention. 1 is a side view of an automobile seat according to an embodiment of the present invention. It is a principal part expansion perspective view of FIG. It is explanatory drawing for demonstrating the effect | action of the vehicle seat which concerns on embodiment of this invention, (a) shows the state at the time of normal, (b) shows the state at the time of reclining, (c) is driving | running | working The state which the seat cushion receiving member moved below by the vibration of this automobile is shown. (A) is a perspective view which shows the structure of the conventional vehicle seat, (b) is a schematic diagram for demonstrating the effect | action.

Explanation of symbols

DESCRIPTION OF SYMBOLS S Automotive seat B Backrest part C Seat part 1 Cushion frame 2 Seat cushion 3 Seat cushion member 4 Back frame 5 Back cushion 6 Back cushion receiving member 8 Connecting member 9 Reclining shaft 32 Hollow wire 51 Side support part 52 Center support part 81 First connecting part 82 Second connecting part

Claims (2)

Consists of a seat portion having a seat cushion and a backrest portion having a back cushion,
A cushion frame as a skeleton of the seat;
A seat cushion receiving member elastically supported by the cushion frame so as to be movable in the vertical and horizontal directions via a spring ;
A back frame serving as a skeleton of the backrest portion rotatably connected to the cushion frame via a reclining shaft;
A back cushion receiving member elastically supported by the back frame so as to be movable in the vertical direction and the horizontal direction via a spring , and a seat comprising:
The back cushion is divided into a side support portion that is fixed along the shape of the back frame, and a center support portion that is positioned inside the side support portion and is fixed to the back cushion receiving member.
A connecting member made of one rigid body that freely connects the rear end of the seat cushion receiving member and the lower end of the back cushion receiving member with a single rotation shaft;
A seat characterized in that the rotating shaft is aligned with the reclining shaft.   The connecting member includes a first connecting part fixedly connected to the seat cushion receiving member, and a second connecting part rotatably connected to the back cushion receiving member and the rotation shaft. The sheet according to claim 1.

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