JP2010023703A - Vehicular seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an excellent seating feel even with a thin pad member of a seat portion of a vehicular seat. <P>SOLUTION: The seat portion is composed of seat frames, a high-tensile steel plate provided between seat frames, and the pad member provided to cover the high-tensile steel plate and the seat frames. By forming a predetermined number of punched holes through the high-tensile steel plate between a human-body support surface and portions fixed to the seat frames, the high-tensile steel plate serves as a desired elastic support plate. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The invention of this application relates to a configuration of a vehicle seat in which the thickness of a pad portion can be reduced.

  In general, a seat for an automobile is assembled with a pad member such as a foamed foam body on a seat frame and supported by a cushion spring such as a wire or an S-shaped spring stretched in the frame of the seat frame from behind the pad member. It is assembled by enclosing it with a trim cover or the like.

  By the way, the cushion spring needs to be attached to the both ends of the seat frame at the ends of the cushion spring and stretched in the frame of the seat frame. For this reason, not only a considerable amount of time is required for assembling the cushion spring as described above, but also the cushion spring itself is formed of a heavy metal wire, so the weight of the entire seat is reduced and the seating is reduced. It is a hindrance to improve the feeling.

  Therefore, in order to solve such a problem, for example, at least one of the seat back frame and the seat cushion frame is provided with a cloth-like spring stretched in a three-dimensional curved surface shape that fits the human body, and the cloth-like spring is provided. Is formed by connecting a plurality of highly elastic fiber members having different spring constants to each other (Patent Document 1), and a high-density shrinkable cloth is lined and joined to the center portion of the sheet, while a relatively low-density shrinkable cloth is used. As a seating pad (Patent Document 2), a foamed foam body that has been bonded to the other remaining parts by backing is assembled to eliminate the need for a mechanical spring material such as the cushion spring.

JP-A-2-257912 JP 2003-250669 A

  In the case of the above configuration, it is possible to eliminate the need for a cushion spring such as a metal wire or S-shaped spring, and since there is no hard uneven feeling when sitting as in the case of a wire or S-shaped spring, It is possible to reduce the thickness of the pad member and reduce the weight of the sheet itself.

  However, in the case of the same configuration, since the configuration is made of a fiber material, there is a problem of lack of durability and stability due to long-term use, and attachment is not always easy.

  The invention of this application was made to solve such a problem. A high-tensile steel plate having high tensile strength is used as a support plate such as a hip or a back, and the human body support surface and the seat frame side of the high-tensile steel plate are used. A vehicle seat that realizes an appropriate elastic support structure according to the place of use by forming a predetermined number of punching holes between the fixed portion and the punching hole forming portion and causing the punching hole forming portion to function as an elastic expansion and contraction portion. It is intended to provide.

  In order to achieve the above object, each invention of the present application includes the following effective problem solving means.

(1) The problem solving means of the invention of claim 1 The problem solving means of the invention of claim 1 is a high-strength steel plate having a seat portion provided between the seat frame and the seat frame, and the high-tensile steel plate and the seat frame. And a desired elastic support for the high-tensile steel plate by forming a predetermined number of punching holes between the human body support surface of the high-tensile steel plate and the seat frame side fixing portion. It is characterized by being configured to function as a plate.

  According to such a configuration, the human body support surface portion that supports the human body via the pad member is formed by a wide flat surface, while the same portion elastically expands and contracts against tensile stress. It will be elastically supported by the seat frame through the punching hole, and even if the pad member is made thin, it will not make the occupant feel the unevenness as with conventional wires or S-shaped springs. .

  Further, since a metal plate is used as the elastic plate, the durability is high, and the stability and reliability are high.

  Furthermore, the required elasticity can be easily controlled by the size, shape, number, and installation position of the punching holes, and can be realized at low cost.

  In addition, the attachment is simple because it is only necessary to fix the end of the high-tensile steel plate to the seat frame by a method such as welding.

(2) Problem solving means of the invention of claim 2 The problem solving means of the invention of claim 2 is characterized in that, in the structure of the problem solving means of the invention of claim 1, the seat portion is a hip seat portion. Yes.

  According to such a configuration, the action of the problem solving means of the invention of claim 1 is effectively realized in the hip seat portion of the vehicle seat.

(3) Problem solving means of the invention of claim 3 The problem solving means of the invention of claim 3 is characterized in that, in the structure of the problem solving means of the invention of claim 1, the seat portion is a seat back portion. It is said.

  According to such a configuration, the action of the problem solving means of the invention of claim 1 is effectively realized in the seat back portion of the vehicle seat.

(4) The problem-solving means of the invention of claim 4 The problem-solving means of the invention of claim 4 is the structure of the problem-solving means of the invention of claim 2, wherein the high-tensile steel plate is formed in a cross shape as a whole, The front, rear, left and right end portions are attached and fixed to the front, rear, left and right frame portions of the seat frame.

  The hip seat portion takes a large weight and easily moves in the front / rear / right / left directions.

  Therefore, in order to achieve a stable supporting force and a uniform elastic distribution with respect to them, it is preferable that the high-tensile steel plate extends in the front-rear and left-right directions and is elastically supported at the front-rear and left-right positions.

  As a result, according to the invention of this application, it is possible to provide a vehicle seat having a good seating feeling while reducing the thickness of the pad member and reducing the cost as much as possible.

  1 to 3 show the configuration of a vehicle seat according to the best embodiment of the invention of this application.

  First, FIG. 1 shows an external structure of the vehicle seat 1. The vehicle seat 1 includes a hip seat portion (seat cushion portion) 2, a seat / back portion 3, a headrest portion 4, and a seat / back portion 3. The hinge bracket 5 is connected to the hip seat 2 so as to be relatively rotatable.

  Next, FIG. 2 shows an internal structure in which the outer skin material 28 and the pad member 29 (see FIG. 3) of the vehicle seat 1 are removed.

  First, the hip seat part 2 includes a pair of left and right side frames 21 and 21 formed by reinforcing the periphery of a plate long in the front and rear direction in a flange shape, and both front and rear ends of the side frames 21 and 21. And a pair of front and rear frames 22, 23 spanned in a beam shape between them, and a first high-tensile steel plate 24 stretched between the side frames 21, 21 and between the front and rear frames 22, 23. ing.

  The first high-tensile steel plate 24 is formed in a cross-like shape as a whole in which each piece 24b, 24b, 24c, 24c extending in the four directions, front and rear, left and right, is a square piece of a predetermined width. Each of the pieces 24b, 24b, 24c, and 24c includes an ellipse that is long in the width direction over substantially the entire portion except for the welded portions (see the X mark portions in FIG. 2) to the frames 21, 21, 22, and 23 described above. ..., 26, 26..., 26, 26..., 26, 26... Is provided.

  .., 26, 26... 26, 26... 26, 26... The strength of the pieces 24b, 24b, 24c, and 24c with respect to the tensile stress in the longitudinal direction and the restoring force when the tensile stress is released, that is, the elastic stretching force (spring property) is set to have a desired magnitude. ing.

  Further, the rectangular plate portion 24a at the center between the pieces 24b, 24b, 24c, 24c of the first high-tensile steel plate 24, which becomes the hip support surface of the seated person, is slightly lower than the surroundings as shown in the figure. The square plate portion 24a is formed with a plurality of punching holes 25, 25 having a large diameter for reducing the weight of the sheet.

  Under such a configuration, the outer periphery of the first high-tensile steel plate 24, the side frames 21, 21, and the front and rear frames 22, 23 are, for example, as shown in FIG. A pad member 29 made of an elastic foam (synthetic resin) 28 is joined and integrated to form the hip sheet portion 2 as shown in FIG.

  Therefore, according to such a configuration, each of the front, rear, left and right pieces 24b, 24b, 24c, 24c of the first high-tensile steel plate 24 has a high tension expanded metal having a restoring force in the expansion / contraction direction, that is, a planar shape. It becomes possible to function as an elastic spring member, and the hip part of the seated person is elastically supported via the flat rectangular plate part 24a. Therefore, even if the thickness of the pad member 29 is reduced, it is not necessary for the seated person to feel an uncomfortable hard and uneven feeling like when a conventional wire or S-shaped spring is used.

  In the case of the same configuration, since the entire support portion is substantially a single metal plate, the strength and durability are high, and the front and rear, left and right pieces 24b, 24b, 24c and 24c are attached to the front and rear, left and right. Since it only has to be connected to the upper surfaces of the frames 21, 21, 22, 23 by a method such as welding, it is very simple and has high stability and reliability after attachment.

  Further, the seat back portion 3 includes a continuous ring frame 31 that is continuous in a substantially rectangular shape that is long in the vertical direction, headrest mounting brackets 41 and 41 provided at the upper end portion 31a of the link frame 31, and the same ring frame. 31 and a second high-tensile steel plate 32 having a predetermined width in the up-down direction, which is stretched between the side portions 31b, 31b, and the lower end portion 31c of the continuous frame 31 has both left and right end portions thereof. 1 is attached to the connecting holes 27 and 27 at the rear ends of the side frames 21 and 21 on the hip seat 2 side via the hinge brackets 5 and 5 shown in FIG.

  The second high-tensile steel plate 32 is connected and integrated by welding the left and right end portions thereof to the front sides of the left and right side portions 31b and 31b of the continuous frame 31 (see the X mark portion). A plurality of large-diameter punching holes 32b, 32b,... For weight reduction are provided in the central portion side back contact surface 32c, and the welded portions are excluded on the left and right sides of the back contact surface 32c. A plurality of elliptical punching holes 32a, 32a,..., 32a, 32a,..., 32a, 32a,. Yes.

  Therefore, also in the case of this configuration, a plurality of punching holes 32a, 32a..., 32a, 32a. The wide backrest surface portion 32c is elastically supported by the same elastic action as that of the first high-tensile steel plate 24.

  Therefore, a relatively thin pad member 29 similar to that of FIG. 3 described above is covered and stretched on the outer periphery of the continuous frame 31 and the second high-tensile steel plate 32 portion of the seat back portion 3. Even in this case, the seated person can use it with a soft feeling as a whole without feeling uncomfortable unevenness like when using a wire or S-shaped spring on the back.

  The first and second high-tensile steel plates 24 and 32 in the above embodiment are selected to have a tensile strength of 490 Mpa or more (JIS: HT steel, etc.) in consideration of, for example, weldability. The plate thickness is made as thin as possible within a range where necessary rigidity and strength can be obtained, so that weight is reduced and soft elasticity with a good feeling of use is realized.

1 is an external perspective view of a vehicle seat according to a best embodiment of the invention of this application. It is a perspective view which shows the internal structure of the vehicle seat. It is sectional drawing (AA of FIG. 1) which cut | disconnected from upper direction to the downward direction in the center of the hip seat part of the vehicle seat, and was seen in the back direction.

Explanation of symbols

  1 is a vehicle seat, 2 is a hip seat (seat cushion), 3 is a seat back, 4 is a headrest, 21 and 21 are side frames, 22 is a front frame, 23 is a rear frame, and 24 is a first height Tension steel plates, 24b and 24b are left and right pieces of the first high-tensile steel plate, 24c and 24c are front and rear pieces of the first high-tensile steel plate, 26, 26 ... are punching holes of the first high-tensile steel plate, 31 is A continuous frame of the seat back 3, 32 is a second high-tensile steel plate, 32 a, 32 a... Are punching holes of the second high-tensile steel plate, and 32 c is a back contact surface portion of the second high-tensile steel plate.

Claims (4)

  The seat portion is composed of a high-tensile steel plate provided between the seat frame and the seat frame, and a pad member provided so as to cover the high-tensile steel plate and the seat frame. A vehicle seat characterized in that a predetermined number of punching holes are formed between the fixing portion and the high-tensile steel plate to function as a desired elastic support plate.   The vehicle seat according to claim 1, wherein the seat portion is a hip seat portion.   The vehicle seat according to claim 1, wherein the seat portion is a seat back portion.   3. The vehicle seat according to claim 2, wherein the high-tensile steel plate is formed in a cross shape as a whole, and is fixed by attaching the front, rear, left and right end portions to the front, rear, left and right frame portions of the seat frame. .

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