JP4591196B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat, and more particularly to a vehicle seat having an improved seat back structure.

Regarding this type of technology, for example, the sheet structure disclosed in Patent Document 1 is known. In this technology, a seat back in a vehicle seat includes a back board on the back surface. A resin or wooden plate is used for the backboard, and the plate is coupled to the seatback frame. In addition, the surface of the plate material is covered with a skin material sewn on the back surface of the seat skin that is put on the seat back.
JP-A-8-256874

  In the technique disclosed in Patent Document 1, when covering the seat back, first, the plate material of the back board is fixed to the seat back frame, and then the seat skin is covered. At this time, it is necessary to connect the seat cover to the periphery of the plate or the seat back frame while aligning the cover of the backboard sewn to the seat cover to the position of the plate. For this reason, the covering operation of the seat back becomes complicated.

  The present invention is intended to solve such a problem, and an object thereof is to simplify the covering operation in the seat back provided with the back board.

The present invention is for achieving the above object, and is configured as follows.
The invention according to claim 1 is a vehicle seat having a structure in which a backboard is provided on the back surface of the seat back, and the backboard can be flexibly bent by elasticity, and the seat back frame side. And a skin material covering the surface of the plate material, and the plate material and the skin material are integrated in advance with the seat skin to be put on the seat back. ing. The left and right side portions of the plate material are supported from both the front and back sides by both vertical frame wires and side frames in the seat back frame.

  Thereby, in the covering process of the seat back, the back board is put on the seat back together with the seat skin using the flexible bending of the plate material, and the work is completed simply by fitting the plate material to the seat back frame, The seat back covering operation is simplified.

  In addition, due to the flexibility of the plate material on the backboard, a large load is applied to the seatback from the seat occupant side, such as when the vehicle is stopped due to a sudden brake, and the pad support spring in the seatback is pressed against the backboard. Even in such a case, it is possible to eliminate the feeling of discomfort for the seat occupant by flexibly bending the plate material of the backboard. Furthermore, when the back board is touched from the back side of the seat back, the plate material flexes flexibly and does not touch the internal pad support spring, so that the quality of the seat is enhanced.

  The invention according to claim 2 is the vehicle seat according to claim 1, wherein the board material and the skin material of the backboard are integrated by sewing together with the seat skin that is put on the seat back. Yes.

  Thereby, on the back side of the seat back, the shape of the back board and the boundary line between the back board skin material and the seat skin are clearly determined, and the design of the back of the seat back is improved.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is an external perspective view of a vehicle seat as viewed from the back side. FIG. 2 is a perspective view showing the internal structure of the vehicle seat in FIG. 1 as seen through. FIG. 3 is an enlarged cross-sectional view in the direction of arrow AA in FIG. 4 is an enlarged cross-sectional view in the direction of arrow BB in FIG. FIG. 5 is an enlarged cross-sectional view of a part of FIG.

  As is well known, the vehicle seat is roughly divided into a seat cushion 10 and a seat back 20. The seat back 20 can be adjusted in the tilt angle in the front-rear direction or tilted down by operating a reclining device (not shown). The basic structure of the seat cushion 10 and the seat back 20 is that the seat skins 12 and 22 are made by attaching pads such as urethane foam to individual metal frames and sewing the surface of each pad with leather or cloth. It is covered with.

  Looking specifically at the internal structure of the seat back 20, the seat back frame 24 has the upper ends of the left and right side frames 24a connected by the upper frame 24b and the lower parts of the side frames 24a connected by the lower frame 24c. (FIG. 2). A pad support spring 28 (contour mat) for receiving the back surface of the pad 30 is stretched between the side frames 24a (FIG. 5). The pad support spring 28 is configured by combining a plurality of elastic wires, and a part of the pad support spring 28 is hooked and coupled to hooks 29 fixed to both side frames 24a (FIG. 5). The seat back frame 24 includes a pair of vertical frame wires 26 arranged along the vertical direction inside the seat back frames 24 (FIG. 2).

  As shown in FIG. 5, the pad 30 of the seat back 20 has a shape covering the seat back frame 24 and the pad support spring 28, and is open on the back side of the seat back 20. The surface of the pad 30 is covered with a sheet skin 22, and a back surface material 32 using a nonwoven fabric or the like is attached to the back surface. In the seat cover 22, the sewn portion of the front portion 22a covering the front side of the seat back 20 and the side portion 22b covering the side is drawn into the inner side of the seat back 20 and thereby is designed. Has a parting line. In general, as shown in FIG. 5, the sheet skin 22 is retracted by connecting the wire 22 d passed through the hanging cloth 22 c of the sewing portion and the insert wire 34 in the pad 30 with a hog ring 36. Is called.

  A design surface of the back surface of the seat back 20 is configured by closing an open portion of the pad 30 with the back board 40. The backboard 40 has a configuration in which the surface of a flexible elastic plate material 41 such as foamed PP (polypropylene) is covered with a skin material 42 having the same material and pattern as the seat skin 22 of the seat back 20. The plate member 41 has cutout portions 41a on both the left and right sides near the lower portion thereof, and the lower portion of the cutout portions 41a is a locking portion 41b that projects outward from the other portions.

  The skin material 42 of the backboard 40 is integrated with the plate material 41 by sewing the left and right edges thereof to the plate material 41 along the vertical direction. Moreover, both edges of the skin material 42 are sewn to the plate material 41 together with the edge on the back side of the side portion 22b in the seat skin 22 of the seat back 20 (FIG. 5). This sewing portion is shown as a sewing line 43 in FIG. And the lower edge in the skin material 42 is sewn to the skin material 46 of the carpet ground which is longer than the lower edge of the plate material 41 and covers a portion near the floor on the back of the seat back 20 (FIG. 4). Although not shown, the upper edge of the skin material 42 is sewn to the rear edge of the upper portion of the seat skin 22 of the seat back 20. As a result, the backboard 40 is configured to constitute a part of the seat skin 22 of the seatback 20.

  In the covering process of the seat back 20, the seat skin 22 is put on the surface of the pad 30 together with the back board 40. Then, the backboard 40 is positioned in the open portion on the back surface of the pad 30 while utilizing the flexible bending of the plate material 41. At this position, the plate 41 of the backboard 40 is fitted and joined to the seatback frame 24 side. That is, the left and right side portions of the plate material 41 are respectively inserted inside the vertical frame wires 26 and hooked. Further, the lower portion of the plate member 41 is positioned outside the lower frame 24c using the cutout portion 41a, and both locking portions 41b below the plate member 41 are positioned outside the side frame 24a.

  As a result, the plate member 41 of the backboard 40 is supported from the front surface side (rear surface side) by the two vertical frame wires 26 in the seat back frame 24 and is supported from the rear surface side by the side frame 24a and the lower frame 24c. . In addition, as shown in FIG. 3, the insertion allowance of the both sides of the board | plate material 41 inserted inside the both vertical frame wire 26 is larger than the other side (right side) as shown in FIG. If the side is hooked first with respect to the vertical frame wire 26, the operation is easy.

  As described above, the assembly of the backboard 40 is also completed by the operation of covering the seat cover 22 on the pad 30. The back board 40 is coupled and positioned on the seat back frame 24 side, whereby the side portion 22b of the seat cover 22 is drawn into the seat back 20 inside. Further, the skin material 42 on the surface of the backboard 40 is held in a state free from wrinkles by the plate material 41 serving as a backing member. From these, the design parting line which becomes the boundary between the seat skin 22 and the backboard 40 becomes clear, the shape of the backboard 40 is also stable, and the design of the back side of the seat back 20 is enhanced. (FIG. 1).

Next, the deformation when a load is applied to the seat back 20 from the seat occupant side will be described.
FIG. 6 is a plan sectional view showing the seat back 20 in a state where a person is normally seated, corresponding to FIG. FIG. 7 is a plan sectional view showing the seat back 20 in a state in which a large load is applied from the seat occupant side in correspondence with FIG. As shown in FIG. 6, in a state where the seat back 20 normally receives the upper body of the seat occupant, the pad 30 is compressed and deformed by the load from the seat occupant side, and the pad support spring 28 is pushed and bent. Move to the back side. However, a gap remains between the pad support spring 28 and the back surface of the plate 41 of the backboard 40 in this state, and the backboard 40 is not subjected to a load.

  For example, when a heavy load is applied from the seat occupant side, such as when the vehicle is suddenly braked, the pad 30 is greatly compressed and deformed as shown in FIG. 7, and the pad support spring 28 is greatly pushed and moved. The pad support spring 28 is pressed against the plate material 41 of the back board 40. As a result, a load is also applied to the backboard 40, but the plate material 41 is flexibly bent to absorb the load and prevent the seat seat occupant from feeling uncomfortable. As described above, the back board 40 is configured to bend, so that the thickness of the pad 30 of the seat back 20 can be reduced without deteriorating the seating feeling.

It should be noted that the embodiments of the present invention include the following technical matters in addition to the technical matters described in the claims.
The left and right edges of the plate 41 of the backboard 40 are supported from the front side (back side) by both vertical frame wires 26 in the seat back frame 24, and are supported from the back side by the side frames 24a and the lower frame 24c. Thus, it is coupled to the seat back frame 24 side. By employing such a coupling means, it is easy to perform the covering operation of the seat back 20 and the assembling operation of the back board 40 in parallel.

Although the best mode for carrying out the present invention has been described above with reference to the drawings, this embodiment can be easily changed or modified without departing from the spirit of the present invention.
For example, the plate material 41 of the backboard 40 is not limited to foamed PP, and may naturally be replaced with another resin material as long as the material has flexible elasticity. Similarly, the backboard 40 is not limited to a design in which the material and pattern of the skin material 42 are matched to the sheet skin 22. Further, depending on the type of the seat back frame 24, the vertical frame wire 26 may not be provided. In that case, the left and right edges of the plate 41 are inserted into the left and right side frames 24a and hooked.

External perspective view of the vehicle seat viewed from the back side 1 is a perspective view showing the internal structure of the vehicle seat in FIG. Enlarged cross-sectional view in the direction of arrows A-A in FIG. Enlarged cross-sectional view in the direction of arrow BB in Fig. 2 Sectional drawing which expanded and represented a part of FIG. Flat sectional view showing the seat back in a state where a person is normally seated corresponding to FIG. Plan sectional view showing the seat back in a state where a heavy load is applied from the seat seater side in correspondence with FIG.

Explanation of symbols

20 Seat back 22 Seat skin 24 Seat back frame 30 Pad 40 Back board 41 Plate material 42 Skin material

Claims (2)

A vehicle seat having a structure in which a backboard is provided on the back surface of the seat back, the backboard can be flexibly bent by elasticity, and can be fitted and coupled to the seat back frame side. It is composed of a plate material and a skin material covering the surface of this plate material, and this plate material and the skin material are integrated in advance with the sheet skin to be put on the seat back, and the left and right side portions of the plate material are A vehicle seat that is supported from both front and back sides by both vertical frame wires and side frames in a seat back frame . The vehicle seat according to claim 1, wherein the backboard plate material and the skin material are sewn together with the seat skin that is put on the seat back.