JP2000157376A - Seat cover structure of seat cushion capable of changing length - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat cover structure capable of corresponding to changes of a length of a seat cushion without relying on the expansibility of a material of a seat cover in a seat capable of changing a length of the seat cushion. SOLUTION: This is a structure of a seat cover which is provided with a length variable device changing a length of a seat cushion by elastically displacing a bent front part 14a in the forward and backward directions through an operation roller 18 arranged on an inner side of the bent front part of a cushion pad 14 and covers the seat cushion. In this case, the seat cover consists of a side cover member 26 covering an upper face and a side face of the cushion pad and a main seat cover member 35 in which a rear end side is connected at a width position of a predetermined front and rear section of the upper face of the side cover member and is overlapped on the side cover member and a front end side is arranged on a lower face along the bent front part of the cushion pad. The front end side of the main seat cover member is connected with the length variable device through an expandable belt member 38.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat cover structure of a seat cushion having a variable length which can be applied to a seat (also referred to as a seat) for an automobile, an airplane, or furniture.

[0002]

2. Description of the Related Art Conventionally, in general, the length of a seat cushion of a seat is formed to be a length based on a standard sized person, and most of the seat cushion has a structure in which a seat cushion and a seat back are fixed.

[0003] Therefore, when a person with a physique smaller than the standard physique sits, he cannot sit deeply because the length of the thigh does not match the length of the seat cushion, and cannot fit between the body and the seat back. There was a problem that a gap was formed and a comfortable posture could not be maintained. Further, when a person with a large physique sits, there is a problem that the sitting comfort is poor even if the person sits deeply because the length of the thigh is longer than the length of the seat cushion.

[0004] In order to solve these problems, for example, the entire seat cushion is slid forward and backward to change the length of the seat cushion depending on the difference from the position of the seat back, or as shown in FIG. To
A predetermined range is divided on the front edge 3 side of the cushion pad 2 of the seat cushion 1 to form a slide portion 4 which slides back and forth, and the slide portion 4 is moved back and forth by a slide operation means to solve the above problem. A seat having such a configuration has been developed.

[0005]

However, in the case of the structure in which the entire seat cushion is moved back and forth, the structure of the reclining portion is complicated, and if a large amount of movement of the seat cushion is provided, the reclining portion is exposed.
There is a problem that the appearance from the rear deteriorates and the design is impaired. Further, in the configuration in which the slide portion 4 obtained by dividing the front edge portion 3 of the cushion pad 2 is slid, the groove portion 5 is formed between the cushion pad 2 and the slide portion 4 of the front edge portion 3, so that the seat pad becomes uncomfortable when seated. As a result, the seat cover of the seat cushion 1 bites into the groove portion 5 and small objects are caught in the groove portion 5 to impair the appearance.

For this reason, for example, a seat cushion has been developed in which the entire front edge 3 of the cushion pad 2 is elastically expanded and contracted in the front-rear direction by expansion and contraction means to change the cushion length (not shown). However, due to the slide part 4,
Alternatively, the one that elastically expands and contracts the entire front edge portion depends on the elasticity based on the material of the seat cover (skin material) that covers the seat cushion, and can sufficiently cope with a change in the length of the seat cushion. However, there was a problem that the choice of the skin material was restricted.

Accordingly, an object of the present invention is to provide a seat in which the front edge of the seat cushion is elastically expanded and contracted by expansion and contraction means to change the cushion length, without relying on the elasticity based on the material of the seat cover. An object of the present invention is to provide a seat cover structure capable of coping with a change in length.

[0008]

According to a first aspect of the present invention, there is provided a cushion pad in which the front portion of the cushion pad is moved in the front-rear direction via an operating roller disposed inside the front portion of the cushion pad. A structure of a seat cover that covers a seat cushion provided with a length variable device that changes the length of the seat cushion by elastically displacing the seat cover, wherein the seat cover covers at least an upper surface of the cushion pad, The rear end side is connected to the width position of the upper and lower predetermined portions of the upper surface of the side cover member, and the front end side is overlapped with the side cover member and the front end side is composed of a main seat cover member arranged on the lower surface along the bent front portion of the cushion pad, The front end of the main seat cover member is connected to the variable length device via an elastic band.

In the seat cover structure according to the first aspect of the present invention, the cushion length can be changed by operating the variable length device, and the main seat cover member of the seat cover follows the displacement of the cushion length via the elastic band. I can make it. Since the seat cover does not rely on the elasticity of the skin material as in the past, but through the elastic band material, there is an advantage that the flexibility of the skin material selection is high, the change in the cushion length is not noticeable, and There is no strange feeling of change.

According to a second aspect of the present invention, in the first aspect, the connection portion of the main seat cover member connected to the side cover member is formed in a groove recessed in the width direction of the cushion pad. It is characterized in that both members are retracted, and the retracted portions of both members are fastened to the suspending wire inserted into the cushion pad near the groove via the stopping means.

According to the second aspect of the present invention, since the connecting portion of the main seat cover member to the side cover member is drawn into the groove of the cushion pad, there is no sense of discomfort when seated. Further, since the main seat cover member is fixed in the retracted state, even if the front end side at the front portion of the bending is movable, it is possible to maintain a good tension state without wrinkling.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. This seat cushion 11
Has the appearance structure shown in FIG. That is, FIG.
As shown in FIG. 1, a cushion pan 12 on which a cushion pad 14 is placed, and a front edge portion 13 of the cushion pan 12
A variable device 15 for changing the length of the seat cushion 11 by elastically deforming the front portion 14a of the cushion pad 14 which is attached to the front end of the cushion pad 14 so as to be bent back and forth in the front-rear direction so as to expand and contract. The seat cover 25 covers the cushion pad 14.

As shown in FIG. 2, the cushion pan 12 is formed in a dish-like shape so that a cushion pad 14 made of a urethane home or the like can be placed thereon, and a variable length device 15 is provided on the front edge 13 side. ing.

The variable length device 15 is shown in FIGS.
(a) As shown in FIG.
4a is extrudable. That is, the attachment member 1 attached to the front edge portion 13 of the cushion pan 12
3a, the operating shaft 17 is inserted so as to be able to advance and retreat in the front-rear direction,
The bracket 16 is fixed to the operating shaft 17 on the front side of the mounting member 13a. The bracket 16 is a member for pulling and supporting the front part of the central main seat piece 36, and moves back and forth with the movement of the operating shaft 17. Mounting member 1
A length adjusting member 21 such as a lock nut is attached to a portion of the operating shaft 17 on the rear side of 3a.

On the other hand, the operating roller 1
8 are attached in the width direction of the bending front portion 14a. A guide bar 20 inserted through the mounting member 13a is horizontally disposed on both sides of the operation shaft 17, and both ends of a roller shaft 19 of the operation roller 18 are pivotally mounted on the guide bar 20 to support the operation roller 18. I have. The ends of the two guide bars 20 on the side inserted into the mounting member 13a are connected to the operating shaft 1 described above.
A length adjusting member 21 is attached at a position having the same length as 7.

The operating shaft 17 of the variable device 15 formed as described above is provided so as to be moved forward and backward by being guided by the guide bar 20 by appropriate operating means (electrical or mechanical means) (not shown). By the front and rear operation of the operating shaft 17, the front bent portion 14a of the cushion pad 14 is elastically deformed in the front and rear direction so as to expand and contract, so that the length of the seat cushion 11 can be changed.

This seat cover 25 is shown in FIGS. 1 and 5 (a).
(b), as shown in FIGS. 6 and 7, a side cover member 26 and a main seat cover member 35 are provided. The side cover member 26 includes a frame cover member 27 that covers the left and right frame portions of the cushion pad 14, a back piece 30 and an extendable piece 31 that connect the left and right frame cover members 27. The left and right frame cover members 2
7 is sewn in a bag shape by a band-shaped upper side skin piece 28 and a side skin piece 29 cut into a predetermined shape, and the depth sides of the left and right frame cover members 27 are substantially rectangular in a predetermined range. The side piece 30 is sewn and connected, and between the back side piece 30 on the front side of the back side piece 30 and the upper side skin piece 28 is, for example, rubber or an elastic piece obtained by assembling and weaving it. An elastic piece (corresponding to the elastic band material of the present invention) 31 is sewn. The elastic piece 31 may be bonded and fixed to the front end or the rear surface of the front bending portion 14a.

As shown in FIG. 5 (b), a groove 14b is formed at a predetermined position of the cushion pad 14 in the width direction at the portion where the rear piece 30 and the elastic piece 31 are sewn.
The upper side skin piece 28 is formed in a loop portion 28a and sewn so as to be fitted in the fitting portion 14a, and a suspension wire 14c inserted between the loop portion 28a and parallel to the groove portion 14a of the cushion pad 14 is formed. The hanging wire 32 to be hung via the C-ring 33 is inserted through the C-ring 33, and a main seat cover member 35 is integrally sewn between the loop portions 28a.

The main seat cover member 35 is provided with the telescopic piece 3.
1 and both upper side skin pieces 28, as shown in FIGS. 5 (a) and 5 (b).
From the mounting position of the groove 14b of the cushion pad 1
4 are folded from the upper surface to the lower surface side from the bending front portion 14a. The main seat cover member 35, as shown in FIG.
A belt-shaped central main seat piece 36 having a predetermined width and side main seat pieces 37 sewn to the left and right of the central main seat piece 36, and the sewing width is equal to the left and right upper side skin pieces of the frame cover member 27. The sewing width is sewn to approximately the same width as the sewing width of the extension piece 28 and the elastic piece 31.

The folded edge of the central main seat piece 36 and the side main seat piece 37 sewn to the left and right have a predetermined width in the sewing width direction. An elastic piece (corresponding to the elastic band material of the present invention) 38 of the same quality is sewn.

As described above, the seat cover 25 composed of the side cover member 26 and the main seat cover member 35 sewn to the loop portion 28a of the side cover member 26 has a structure in which the side cover member 26 Covered. In this cover, a frame cover member 27 covers the left and right frame portions of the cushion pad 14. In this cover state, the lower edge side of the frame cover member 27 is fixed to the cushion pan 12 side, for example, by a C-ring or the like,
The front edge side of the telescopic piece 31 is in a free state. The hanging wire 3 attached between the loop portions 28a
2 is fitted into the groove 14b of the cushion pad 14, and the hanging wire 32 is
The suspension wire 14c is inserted into the suspension wire 14c and inserted into the suspension wire 14c. The telescopic piece 31 is attached in an extended state. The front ends of the elastic piece 31 and the outer skin pieces 28 are adhesively fixed to the front end of the bent front portion 14a of the cushion pad 14, as shown in FIG.

The main seat cover member 35 is a cushion pad 1.
4, the elastic piece 38 sewn to the end of the elastic piece 38 extended to the mounting bracket 16 of the variable length device 15 via the C-ring 33 while being folded back below the bending front portion 14 a. Installed in condition. When the cushion pad 14 is covered with the seat cover 25 in this manner, the length varying device 15 normally has a length such that the occupant of the seat cushion 11 can sit on the seat cushion 11 as shown in FIG. L is set.

The seat cushion 1 constructed as described above
1, the length variable device 15 is normally set to a length L that allows a person of a standard size to sit on as described above. Therefore, when a person of a standard physique sits, there is no need to operate the variable length device 15. The distance from the front seat is adjusted by operating a seat track (not shown) on the floor to which the seat cushion 11 is attached.

On the other hand, when a person having a physique smaller than the standard physique sits, the variable length device 15 is operated to retreat the operation roller 18 via the operation shaft 17 as shown in FIG. When the cushion pad 14 is adjusted to the length L1, for example, the front bent portion 14a of the cushion pad 14 is reduced toward the rear side by its elastic restoring force. On the side of the front cover 14c of the side cover member 26 of the seat cover 25 covering the cushion pad 14 with the elasticity reduction of the front bending portion 14a, the left and right frame cover members 27 are bent before the bending by the contraction of the stretchable piece 31 in the extended state. It follows the elastic contraction of the portion 14a. In addition, the main seat cover member 35 is connected to the bent front portion 14a.
The main seat cover member 35 follows the elastic contraction of the bent front portion 14a due to the contraction of the telescopic piece 38 attached to the mounting bracket 16 as the elastic contraction occurs.

As a result, the seat cushion 11 has a length L
1 so that a person with a physique smaller than the standard physique can be seated, and with the change of the cushion pad 14 to the length L1, the side cover member 26 of the seat cover 25 becomes elastic with the bent front portion 14a. Since the shrinkage is followed via the stretchable piece 31, each piece is maintained in a tensioned state without relying on its elasticity, so that no wrinkles or the like are generated on the frame side. The main seat cover member 35 also follows the elastic contraction of the bending front portion 14a by the contraction of the telescopic piece 38, and each piece maintains a tensioned state without relying on its elasticity, and there is no generation of wrinkles or the like.

When a person having a physique larger than the standard physique is seated, the operating roller 18 is advanced through the operating shaft 17 to operate the length varying device 15 as shown in FIG. When the length is adjusted to, for example, the length L2, the front bent portion 14a of the cushion pad 14 is elastically extended and displaced to the front side by its elasticity. The bending front portion 14 of the side cover member 26 of the seat cover 25 covering the cushion pad 14 with the elastic extension displacement of the bending front portion 14a.
On the c side, the left and right frame cover members 27 follow the elastic extension displacement of the bent front portion 14a without extension due to the extension of the stretchable pieces 31 in the extended state. Further, the other main seat cover member 35 is bent without the respective pieces being elongated by the extension of the telescopic piece 38 attached to the mounting bracket 16 with the elastic extension displacement of the bending front portion 14a. It follows the elastic extension displacement of the front part 14a.

Thus, the seat cushion 11 has a length L
2 and a person having a body size larger than the standard body size can be seated. With the change of the cushion pad 14 to the length L2, the side cover member 26 of the seat cover 25 becomes elastic with the bent front portion 14a. Since the extension displacement is followed via the extension piece 31, each piece is maintained in a tensioned state without being extended, so that wrinkles and the like do not occur on the side of the frame, and also in the main seat cover member 35. The extension of the telescopic piece 38 follows the elastic extension displacement of the front bending portion 14a, and each piece maintains a tensioned state without elongation and does not generate wrinkles or the like.

The seat cover 25 according to the present embodiment can be used for a person smaller than the standard body size or a person larger than the standard body size by operating the variable length device 15 to elastically move the cushion pad 14 in the front-rear direction at the bending front portion 14a. And the cushion lengths L1 and L2, the side cover member 26 and the main seat cover member 35 of the seat cover 25 can follow this elastic displacement via the respective elastic pieces 31 and 38, so that wrinkles can be obtained. Etc. do not occur. In particular, the seat cover 25 does not rely on the elasticity of the skin material as in the related art, but has a structure in which the elastic pieces 31 and 38 are combined and sewn to cope with a change in the cushion length. There is an advantage that the degree of freedom is high, and the change of the cushion length by the variable device 15 does not become conspicuous, so that there is no strange feeling when the cushion length changes,
Design and appearance quality can be ensured.

[0029]

According to the first aspect of the present invention, the length of the seat cushion can be satisfactorily changed by the length varying device.

According to the second aspect of the invention, in addition to the effect of the first aspect, the seat cushion does not cause discomfort when seated, and is fixed by the groove so that the fixing property is good and the seat cushion can be changed in length. No wrinkles occur on the seat.

[Brief description of the drawings]

FIG. 1 is a perspective view of a seat cushion.

FIG. 2 is a perspective view of a front portion of the cushion pan.

FIG. 3 is a schematic side view of a variable length device attached to a front portion of a cushion pan.

FIG. 4 is a variable explanatory view of a front portion of a cushion pad bent by a variable length device.

FIG. 5A is a sectional view of a front portion of a seat cushion.
(b) It is an enlarged view of the circle part of FIG.5 (a).

FIG. 6 is a sectional view taken along line II of FIG. 1;

FIG. 7 is a perspective view of a state where a main seat cover member of the seat cover is lifted.

FIG. 8 is a perspective view showing a state where a seat cushion is extended.

FIG. 9 is a perspective view of a conventional cushion pad having a variable cushion length.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Seat cushion 14 Cushion pad 14a Bending front part 15 Length variable device 17 Working axis 18 Working roller 25 Seat cover 26 Side cover member 31, 38 Telescopic piece 35 Main seat cover member

Claims (2)

[Claims] 1. A seat having a variable length device for changing the length of a seat cushion by elastically displacing the front portion of the cushion pad in the front-rear direction via an operating roller disposed inside the front portion of the cushion pad. A seat cover structure for covering a cushion, wherein the seat cover has at least a side cover member that covers at least an upper surface of the cushion pad, and a rear end side connected to a width position of a predetermined front and rear portion of the upper surface of the side cover member, and The front end side is overlapped with the cover member, and the front end side is formed of a main seat cover member arranged on the lower surface along the bent front portion of the cushion pad, and the front end side of the main seat cover member is provided with the length variable device via an elastic band material. The seat cover structure of the seat cushion whose length can be changed, characterized in that it is connected to the seat cushion. 2. A connecting portion of the main seat cover member connected to the side cover member, wherein both members are drawn into a groove recessed in the width direction of the cushion pad, and are stopped by a hanging wire inserted into the cushion pad near the groove. 2. The seat cover structure for a seat cushion with variable length according to claim 1, wherein the retracted portions of the two members are fastened via the first and second members.