JP5842727B2 - Cushion pad for vehicle seat - Google Patents

Description

  The present invention relates to a cushion pad for a vehicle seat. More specifically, the present invention relates to a cushion pad for a vehicle seat including a main pad that forms a seating surface on the surface, and a subpad that is fitted in a recess formed on the back surface of the main pad.

  This type of prior art is disclosed in Patent Document 1, for example. The cushion pad of Patent Document 1 holds a seating sensor between a main pad and a sub pad. In Patent Document 1, the outer periphery of the subpad is formed slightly smaller than the inner periphery of the recess of the main pad. In addition, ridges are formed at opposing positions on the inner peripheral surface of the concave portion of the main pad, and a concave groove is formed on the outer peripheral surface of the sub pad correspondingly. Then, the sub-pad is held in the concave portion of the main pad by fitting the convex strip and the concave groove while pressing each other. When the subpad is inserted into the concave portion of the main pad, the concave groove slides while pressing against each other, but the subpad is positioned within the concave portion by fitting the concave groove with the convex stripe, and the concave groove The other parts do not touch the main pad. In this way, if the portions that do not contact each other can be provided on the fitting surface, the resistance at the time of insertion can be reduced to the extent that the non-contact portion is provided. However, in such a configuration, since a gap is formed between the main pad and the sub pad, it cannot be applied when the main pad and the sub pad are to be brought into close contact with each other. In Patent Document 1, the ridge and the groove are each formed in a semicircular or rectangular cross section having the same width along the insertion direction of the subpad.

  A cushion pad in which a main pad and a sub pad are brought into close contact with each other is disclosed in Patent Document 2, for example. The cushion pad of Patent Document 2 can distribute cold air or hot air introduced from the back surface in the surface direction and blow it out from the pad surface, and constitutes a seat cooling or heating function. In this cushion pad, an air flow path capable of distributing air in the surface direction is formed between the bottom surface of the concave portion of the main pad and the surface of the subpad facing the bottom surface. And in order to prevent air leakage, the protruding item | line is provided in the side surface of the subpad, and the subpad is tightly inserted in the recessed part of the main pad, crushing the protruding item | line. According to such a configuration, the sub pad can be held on the main pad without a gap. However, since the ridges are formed over the entire circumference of the subpad, there is a problem that the resistance when inserting into the recess of the main pad is large and the insertion is difficult.

Japanese Patent Laid-Open No. 2005-199935 JP 2007-54385 A

  The present invention has been made in view of the above problems, and the problem of the present invention is that the sub pad can be securely held in the recess of the main pad while the sub pad is fitted in the recess of the main pad without a gap. However, it is to effectively reduce the resistance during the fitting operation.

The present invention is a cushion pad for a vehicle seat comprising a main pad that forms a seating surface on the front surface, and a subpad that is fitted in a recess formed on the back surface of the main pad, wherein the subpad is the main pad. A convex portion extending in the relative fitting direction of the both is formed on at least one fitting surface of the fitting surface extending in the relative fitting direction of both of the fitting portions. The cushion pad of the vehicle seat is characterized in that the width is a shape that narrows toward the relative fitting direction.

According to the cushion pad of the vehicle seat, the width of the convex portion formed on the fitting surface extending in the relative fitting direction of at least one of the sub pad or the main pad is narrowed in the relative fitting direction. Therefore, the operation resistance due to the repulsive force and the frictional force generated by compressing the convex portion during the fitting operation can be suppressed particularly at the beginning of the fitting. And while keeping the operating resistance small in the fitting operation process, the width of the convex part widens as the sub pad and the main pad are relatively displaced in the fitting direction, so that the repulsive force of the convex part in the final fitting state In addition, the frictional force is sufficiently increased so that the sub pad is securely held in the recess of the main pad.

  According to the cushion pad of the vehicle seat of the present invention, it is possible to effectively reduce the resistance during the fitting operation even when the sub pad is fitted into the concave portion of the main pad without any gap, and the concave portion of the main pad. It is possible to securely hold the subpad.

It is a perspective view of the vehicle seat which concerns on Embodiment 1 of this invention. It is II-II sectional drawing of the seat cushion shown by FIG. It is the perspective view seen from the back surface side of the main pad shown by FIG. It is the perspective view seen from the surface side of the subpad shown by FIG. FIG. 5 is a V arrow view of the subpad shown in FIG. 4. It is sectional drawing which decomposes | disassembles and shows the seat cushion shown by FIG. FIG. 7 is a VII-VII cross-sectional view showing a part of the subpad shown in FIG. 5 in an enlarged manner. It is a figure which expands and shows the convex part of the subpad which concerns on other embodiment of this invention corresponding to FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the seat 11 of the present embodiment includes a seat cushion 13 serving as a seat surface, a seat back 15 serving as a backrest, and a headrest 17, and constitutes a seat of a vehicle such as an automobile. . In each figure, Fr and Rr indicated by arrows indicate the front and rear of the seat 11 determined with reference to the seated person seated on the seat 11. In the seat 11, air is blown out from the seating surface 13a in the seat cushion 13, and the present invention is applied in relation to the configuration. Since other parts do not need to be changed from the conventional vehicle seat, detailed description thereof is omitted.

  As shown in FIG. 2, the seat cushion 13 includes a frame (not shown) that is a substantially rectangular frame-shaped member, and a cushion pad 21 that covers the frame and forms the outer shape of the seat cushion 13, and the cushion pad 21. The seat cover 23 is provided. In addition, the blower 27 is provided on the opposite side to the seating surface 13a, that is, on the back side. An air flow path P is formed in the cushion pad 21 so as to penetrate from the back side to the seating surface 13a side. The flow path P distributes air sent from the blower 27 in the surface direction while penetrating the cushion pad 21 and guides it to a plurality of outlets 29 (see FIG. 1) formed on the seating surface 13a side. A route that can be used is set. As shown in FIG. 2, the air outlet 29 of the cushion pad 21 is covered with the seat cover 23, but the seat cover 23 is made of a cloth-like member having air permeability and is guided from the air blower 27 to the air outlet 29. Air is blown out through the seat cover 23 toward the seating surface 13a.

  The cushion pad 21 is made of a foamed urethane molded body. The cushion pad 21 is formed by combining two parts of a main pad 31 and a sub pad 41 that are molded separately. As for the main pad 31, the surface 31a forms the seating surface 13a. A recess 33 is formed on the back surface 31 b of the main pad 31. The recess 33 is formed as a substantially rectangular recess when viewed from the back surface 31b, and the subpad 41 is fitted therein.

  The sub pad 41 has a shape in which the outer peripheral surface 51 fitted to the concave portion 33 of the main pad 31 matches the shape of the inner peripheral surface 35 of the concave portion 33 to be fitted, and has a plurality of protrusions protruding from the basic shape. Convex part 53 is provided (see FIG. 4 etc.). A plurality of convex portions 53 are formed at intervals in the circumferential direction. A plurality of convex portions 53 are provided on one surface in the four circumferences of the subpad 51, and they are provided apart from each other. In the present embodiment, three locations are provided on the front surface 51a and two locations are provided on the rear surface 51b. The convex portion 53 is formed so as to extend in the relative fitting direction A of the sub pad 41 with respect to the main pad 31, and the protruding amount is the same in the entire relative fitting direction A. And as FIG. 5 shows, the convex part 53 is a trapezoid when it sees from the front, and becomes a shape where width | variety narrows toward the relative fitting direction A. As shown in FIG. As shown in FIG. 6, when the concave portion 33 of the main pad 31 and the subpad 41 are fitted, the convex portion 53 presses against the inner peripheral surface 35 of the concave portion 33 and is compressed to compress the subpad 41. It fits snugly into the recess 33. And the convex part 53 is strongly pressed by the inner peripheral surface 35 of the recessed part 33 with the repulsive force with respect to compression, and the subpad 41 is hold | maintained at the recessed part 33 because a big frictional force arises in the contact surface. In addition, the inner peripheral surface 35 of the recessed part 33 and the outer peripheral surface 51 of the subpad 41 which mutually fit correspond to the fitting surface of this invention.

  As shown in FIG. 3, a groove 37 m is formed on the abutting surface 37 (the back surface of the main pad 31 inside the recess 33) with the subpad 41 in the recess 33. The groove 37m is branched and formed so as to spread in the plane direction from the center. Each tip portion penetrates the surface of the main pad 31 and communicates with the blowout port 29.

  As shown in FIG. 2, a through-hole 47 is formed in the subpad 41 so as to penetrate the back surface 43 and the front surface 45 (surface that faces the main pad 31 in the recess 33). A duct 27 d that guides air sent from the blower 27 is connected to the opening on the back surface 43 side of the through hole 47. In the opening on the surface 45 side of the through hole 47, a stepped portion 49 formed to be recessed by one step from the periphery extends in the surface direction. In a state in which the sub pad 41 is fitted in the recess 33 of the main pad 31, a part of the opening (step portion 49) of the through hole 47 is blocked by the abutting surface 37 of the main pad 31, and between the main pad 31. An air flow path 48 extending in the surface direction is formed, and the other part of the stepped portion 49 communicates with the base end portion of the groove 37 m formed in the main pad 31. The branching portion of the groove 37m of the main pad 31 is closed by a portion that is not the step portion 49 (opening) of the surface 45 of the subpad 41, and the air flow path 39 branched from the subpad 41 is formed. Is formed. The air sent from the blower 27 is guided into the duct 27 d and introduced into the cushion pad 21 through the through hole 47 of the subpad 41, and the flow formed between the main pad 31 and the butting surfaces 37 and 45 of the subpad 41. It is distributed in the surface direction through the passages 48 and 39 and blows out from the outlet 29.

  According to the cushion pad 21 having the above configuration, the sub pad 41 is held in a state of being fitted in the concave portion 33 of the main pad 31 by the repulsive elasticity of the convex portion 53 formed on the outer peripheral surface 51 of the sub pad 41. When the sub pad 41 is fitted, the protrusion 53 is crushed and advances in the recess 33. Here, since the convex part 53 has narrowed toward the relative fitting direction (relative advancing direction), it approachs from the one where a width | variety is narrow. Therefore, the repulsive force is small and it can be made to enter easily. The width of the convex portion 53 gradually increases in the course of progress, and when the subpad 41 is finally stored in the concave portion 33, a sufficient repulsive force can be exerted to hold the subpad 41 in the concave portion 33. In this way, the fitting state can be reliably held while the fitting operation for fitting the concave portion 33 of the main pad 31 and the subpad 41 is easy.

In addition, this invention is not limited to the said embodiment, Other various embodiment can be considered.
For example, in the said embodiment, although the convex part 53 showed the example formed only in the fitting surface (outer peripheral surface 51) of the subpad 41, the convex part 53 is the fitting surface (outer peripheral surface 51) or the subpad 41. What is necessary is just to be provided in at least any one among the fitting surfaces (inner peripheral surface 35) of the recessed part 33 of the main pad 31. FIG. Moreover, the convex part 53 should just be formed in at least one place of the circumferential direction of a fitting surface, but when it is formed in two surfaces of the opposite direction like the said embodiment, holding | maintenance state is hold | maintained. Can be further ensured. Moreover, as long as the convex part 53 has narrowed the width | variety in the relative fitting direction, the shape seen from the front does not necessarily need to be a trapezoid, for example, may be a triangle. Further, the fitting surface facing the convex portion 53 does not necessarily have a planar shape. For example, when viewed from the front, a groove having a depth that matches the convex portion 53 and can be pressed against each other may be formed. Further, as shown in FIG. 7 showing a cross section (cross section in the width direction) orthogonal to the relative fitting direction A, the convex portion 53 is provided so as to be inclined so that both ends in the width direction are narrowed in the protruding direction. Also good. As shown in FIG. 8, the convex portion 53 may be formed so that the protruding amount becomes smaller in the relative fitting direction A of the sub pad 41 with respect to the main pad 31. In this case, when the sub pad 41 enters the concave portion of the main pad 31, the repulsive force is initially small and can be more easily entered. However, when the sub pad 41 is finally contained in the concave portion 33, the sub pad 41 is moved into the concave portion 33. It is possible to exert a repulsive force sufficient to hold it.

  The present invention is not limited to a cushion pad for a seat having a blowing function, but can be applied as appropriate to a cushion pad for a seat back or a pad for a headrest.

DESCRIPTION OF SYMBOLS 11 Seat 13 Seat cushion 13a Seating surface 21 Cushion pad 31 Main pad 31a Front surface 31b Back surface 33 Recessed part 35 Inner peripheral surface (fitting surface)
41 Subpad 51 Outer peripheral surface (fitting surface)
53 Convex

Claims (1)

A vehicle seat cushion pad comprising a main pad for forming a seating surface on the surface, and a subpad fitted in a recess formed on the back side of the main pad,
A convex portion extending in the relative fitting direction of the two is formed on at least one fitting surface of the fitting surface extending in the relative fitting direction of both of the subpads fitted in the concave portion of the main pad. A cushion pad for a vehicle seat, wherein the width of the convex portion is narrowed toward the relative fitting direction.

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