JPS6410370B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automobile seat, and more specifically to a side (side) or thigh (thigh) seat.
The present invention relates to the structure and manufacturing method of an automobile seat equipped with a support device for supporting the seat.

A separate type automobile front seat will be explained as an example.

A front seat in a typical so-called popular car consists of a backrest part and a seat part, and its structure is relatively simple and assembly work is easy. but,
If a thigh support device T or a side support device S is to be installed as shown in FIG. 1, the structure of the seat itself will become complicated. Even if these support devices were to be constructed integrally with a conventional simple seat, the assembly work would be extremely difficult, require skill, and require a considerable amount of man-hours. Further, in the case of a rotatable support device, the integral structure causes tension in the trim, causing a problem that the support portion cannot be moved smoothly. However, the support part (movable part)
Even if it is separated from the main body and made into a so-called unit (for example, as described in Japanese Utility Model Application Publication No. 55-95556), the tension of the trim is eliminated and workability is improved, but this results in a significant increase in cost. However, it is completely unsuitable for use in general public vehicles.

Therefore, the main objective of the invention is to eliminate the above-mentioned drawbacks. That is, it is an object of the present invention to provide an automobile seat that has a simple structure and includes a support device that rotates smoothly, and to provide a method for manufacturing the automobile seat that facilitates assembly work.

To summarize this invention, the present invention relates to a structure of an automobile seat equipped with a support device, which is provided on the side of the backrest and/or the seat and rotates in the width direction of the backrest and/or the seat. In the structure of an automobile seat having a side support device that moves to support the side of an occupant, the backrest portion and/or the seat portion includes a main pad provided on the back side of the seat portion, and a main pad provided on the back side of the seat portion, and a side support device that supports the side portions of the occupant. and a side pad, and the side pad is rotatably supported by a side support device with a gap between the side pad and the main pad at the side of the seat. , the skin of the seat surface of the backrest and/or seat covering these pads is integrally formed with the skin of the side support device, and the skin corresponding to the side surfaces of the side pads is loosely slackened. Then, the outer skin is folded in the above gap and pulled inward, and the retracted end is fixed to the seat of the side support device, while the loose free end of the outer skin is wrapped around the back of the main pad and fixed. Arrived,
It is characterized in that the outer skin is made to slacken or expand within the gap in accordance with the rotation of the side support device.

And, regarding the manufacturing method of this automobile seat, a side part that is provided on the side part of the backrest part and/or the seat part and that rotates in the width direction of the backrest part and/or the seat part to support the side part of the occupant. In the method for manufacturing an automobile seat having a support device, the main pad provided on the backrest portion and/or the seat portion of the seat portion and the side pad of the side support device are separated in advance, and A drive unit that drives the section support device and a driven unit that follows the drive unit are configured to be separable, a mechanical member is attached to the frame of the seat to form a frame structure, and the main pad is attached to the frame structure. a seat subassembly process of forming a seat subassembly;
The edge of the seat trim and one part of the skin to cover the side pads are joined to form an outer skin body, and the side part is attached to the frame to support the back side of the side pads to which the mechanical members of the driven unit are fixed. a trim assembling step of providing a pad, applying the side skin of the outer skin to the side pad, and then fixing it at the end of the side pad to form a trim assembly; , a connecting step of rotatably connecting the driven unit, and providing an outer skin loosely from one fixed end of the side pad toward the back of the main pad, and further covering the main pad. The present invention is characterized in that it includes a final step of providing an outer skin and fixing the end portion thereof to a part of the frame of the seat.

Hereinafter, the present invention will be explained in detail based on illustrated embodiments. Note that the car seat of this example has at least a lumbar support.
The vehicle is equipped with support devices such as a lumbar support (lumbar support device), a thigh support, and a side support, but the structure and assembly method of the thigh support and side support are generally the same, so a description of the thigh support will be omitted. Furthermore, the lumbar support is generally provided in conjunction with the assembly structure of the side support, and will be mentioned when explaining the structure of the side support.

Fig. 2 is an external perspective view of a sheet of one embodiment;
The figure is a schematic perspective view of the seat frame and support device structure, Figure 4 is a cross-sectional view of the main part of the side support part, Figure 5 is an exploded view of the side support part structure, and Figure 6
The figure is an explanatory view of the operation of the pair of left and right side supports, FIG. 7 is an exploded view for explaining the assembly, and FIGS. 8 and 9 are explanatory views of the main parts thereof. In each figure, the same numbers or symbols indicate the same or corresponding parts,
Eliminate duplicate explanations.

In FIG. 2, reference numeral 1 denotes a side handle, and when the handle is rotated, the side support S is rotated in the width direction of the backrest portion B. 2 is the lumbar lever,
By this operation, the lumbar support portion L can be adjusted in the front-rear direction of the backrest portion B.

In FIG. 3, numeral 3 denotes a pipe-shaped seat back frame, which serves as the basis of the support structure for the backrest B and side supports S. 4 is a support bracket,
It is fixed to the seat back frame. A support bush 5 is fixed to the support bracket 4 and pivotally supports the rotation shaft of the lumbar lever 2. 6 is a connecting link for interlocking the pair of left and right side supports S, 7 is a wave-shaped S spring installed between the left and right sides of the seat back frame 3, 8 is a knuckle plate, and 9 is a lumbar support plate.

FIG. 5 will explain the structure of the side support portion with reference to FIG. 4, with appropriate reference to exploded perspective views of each member. The seat back frame 2 is provided with a support bracket 4 having a substantially doglegged cross section and fixed, for example, by welding.A shaft member is supported by a support bush 5 fixed to the support bracket 4. A pipe-shaped lumbar drive shaft 41 is rotatably inserted into the shaft hole of the support bush 5 . This lumbar drive shaft 4
1 extends to the outside of the back pad 42,
The lumbar lever 2 is fixed to the end thereof. Further, a lumbar cam 43 having appropriate irregularities on its circumferential surface is fixed to the other end of the lumbar drive shaft 41. A cap-like member 44 having a bottom on one side is provided to cover the lumbar cam 43. This cap-like member 44 is fitted onto the support bracket 4, and has a notch in its cylindrical side wall (on the back side of the seat), and the lumbar cam 43 protrudes from the notch. It is in contact with one end of the support plate 9. In addition,
This lumbar support plate 9 is supported by a rotation fulcrum 45. Further, a hole having a diameter through which a drive shaft 46 passes is bored in the bottom of the cap-shaped member 44, and the drive shaft 46 is inserted through the cylindrical space of the pipe-shaped lumbar drive shaft 41. This drive shaft 46
is for transmitting driving force to the side support portion by rotating a side handle 1 provided at the outer end of the seat. This drive shaft 46 is solid, and one end is screwed to the side handle 1 located outside the lumbar lever 2.
A male threaded portion 47 is formed on the other portion. The outer diameter of the male threaded portion 47 is slightly larger than the outer diameter of the shaft portion of the drive shaft 46, so that the male threaded portion 47 cannot be removed from the hole at the bottom of the cap-shaped member 44. In other words, the male threaded portion 47 is driven. The end of the shaft 46 abuts the bottom outer wall of the cap-like member 44. A cylindrical female threaded member 48 is provided to be screwed into the male threaded portion 47, and a connecting member 49 is provided to be fixed to the female threaded member 48. This connecting member 49 has a pair of parallel arm portions 49' extending outward in the axial direction, and has a hole 49'' at the end thereof into which a pin 50 is inserted.
These holes 49'' are aligned with holes 52 drilled in the side frame 51, and pins 50 are inserted through them.
This is for rotatably supporting the side frame. That is, when the side handle 1 is rotated to the right to rotate the male threaded portion 47, the female threaded portion converts this rotation into a linear motion and acts to push the side frame 51 leftward. Therefore, a set of members that move the side frame 51 is defined as a side support drive unit. That is, the drive unit includes the side handle 1, the drive shaft 46, the male threaded portion 47, the female threaded portion 48, and the connecting member 49.
This is means for driving the side frame 51 including the.

On the other hand, this side frame 51 is attached to the pin-shaped member 5.
A side frame support plate 54 is provided which is rotatably supported at the seat back frame 3, and this side frame support plate 54 is fixed to the seat back frame 3 by, for example, welding. side frame 51
A hole 55 (provided in the side frame 51) is further bored on an imaginary line connecting the hole 52 and this pin-shaped member 53.
is rotatably supported at one end of the connecting link 6 by, for example, a pin member passing through the hole 55.
The shaft support of the pin-shaped member 53 is the side frame 5.
The connecting link 6 is connected to the side frame of the side support located on the opposite side from that shown in the figure (see Figure 6), and when the side handle 1 is operated, both side frames 51 can be moved inside each other. It is configured to be rotated toward or outward.

As clearly shown in FIG. 5, the side frame 51 has a shape consisting of a base portion 56 that is a side support portion and is provided along a substantially vertical line, and a flat portion that is bent approximately at right angles to the base portion. The hole 5 is installed in the curved plane part (attached along the horizontal line in the side support part).
2,55 are provided.

The base 56 of the side frame 51 is attached to one side (closer to the backrest) of the side back plate 71, which is a thin iron plate with a substantially V-shaped cross section and is provided in close contact with almost the entire back side of the side pad 70. Fixed by welding.
The side pad 70 placed on the thin iron plate 71 having a substantially V-shaped cross section also has a similar substantially V-shaped cross section. The side pads 70 are pads that are independent of a main back pad 72 (with which the back pad 42 is formed integrally to form the main pad) and a seat trim 73, which are disposed on the backrest. The back pad 42 is provided substantially circumferentially around the seat back frame 3 and terminates near the end of the knuckle plate 8. And the part 4 that ends at the end of this knuckle plate 8
The cross-sectional shape of 2' is gently sloped from the inside to the outside. On the other hand, this back pad 42
The end surface of the side pad 70 facing the end 42' of the side pad 70 is preferably formed into a loose V-shape as shown. Therefore, as shown in FIG. 4, a narrow gap 74 is normally formed between the V-shaped end surface of the side pad 70 and the end 42' of the back pad 42.
When the side support narrows, an opening 75 is formed there.

The backrest portion has a main backpad 72 inside, and a seat trim 73 is provided on the main backpad 72, and the seat trim 73 provides good cushioning for the back of the occupant. This seat trim 73 consists of a trim 73' that directly touches the passenger's back, a trim pad 73'' below it, and a trim lining 73.The end where the skin trim 73' and trim lining 73 meet is covered with the side pad 70. It is integrally attached with the encasing skin 76, for example, by sewing.
More specifically, the side pad 70 is covered with a skin 76 over the entire surface from one end to the other end of a thin iron plate-shaped side back plate 71 supporting the back side of the side pad 70. Both ends are fastened with ohm clips OM1, OM2, etc., for example. A sharp V-shaped notch (hereinafter referred to as notch V) is usually formed from this sewing location W to the outside of the sheet. In order to stably form this notch V, it is necessary to attach the skin at this location to the internal frame (in this embodiment, the side back plate 71), but in the past, it was impossible to make this notch V. It was difficult to insert the tool in the above-mentioned fixing work, making it extremely difficult to assemble the side support. Due to such assembly or structural defects, the
As in Japanese Patent No. 95556, the side support was made into a unit and separated. but,
As mentioned above, this method increases costs.

In the present invention, the trim outer skin 73' of the seat trim 73, the end of the trim back side 73, and the outer skin 76 that is attached to the side pad 70 are integrally sewn in advance. Then, it is installed on the assembled body almost at the final stage of the assembly work. This method will be described later.

Furthermore, as clearly shown in FIG. 4, the main back pad 72 is a pad cut to a length just before the end of the seat trim 73. This is to prevent the vicinity of the ohm clip OM1 from coming into contact with the main back pad 72 and resisting the rotation when the side support is rotated in the seat width direction. In other words, a gap SP is formed near the ohm clip OM1 so that the side support can rotate smoothly.

Of course, the outer surface of the back pad 42 is also provided with a skin 76'.
One end is fixed with the ohm clip OM2,
The ohm clip OM2 is loosely attached to the back pad 42 along the V-shaped end, and then the back pad 42 on the back of the seat back frame 3 is wound around the end of the pad. At the end of the support bracket 4 fixed to the back frame 3, it is fastened, for example, with an ohm clip OM3. It should be noted that a bead 78 is formed at the corner end of the back pad 42, but this is done from the viewpoint of preventing damage to the corner end or aesthetically. A back board 79 is provided at the end (portion of the ohm clip OM3) where the back pad 42 is wrapped so that it is not exposed and the frame portion of the seat is not exposed.

Note that preferably the skin 7 on the side pad 70
6 and the skin 76' on the back pad are preferably an integral and continuous skin. There is no problem in assembling, and this will shorten the process. This method will be described in detail later.

In addition, when the skin 76 and the skin 76' are made into a continuous skin, the ohm clip OM2 is used to fix the skin to the end of the side back plate 71 at the deepest part of the narrow gap 74 (or opening 75).
As an alternative, an industrial fastener F having a generally screw-like appearance as shown in FIGS. 4A and 4B may be used. This fastener F is clearly shown in Figure 4B.
This type is made of synthetic wood and includes a head F1, a shaft F2, and a pair of legs F3 and F4. The foot portions F3 and F4 are formed in a tapered shape along the direction in which the fastener F is inserted. And the foot part F3, F
The vertical groove F5 formed between the foot parts F3 and F4 when inserted into a hole smaller than the outer diameter of both foot parts.
This is to allow for elastic compression deformation. FIG. 4B shows a detailed cross section of the fastening part, and the fastener F is passed through a hole 71' drilled in the side back plate 71 and a hole previously provided in the skin 76 or 76'. is fixed to the side back plate 71. Foot part F3 of Fuasuna F,
When F4 comes out of hole 71', the base of the foot is in hole 7.
Fastener F comes into contact with the outer plate surface of 1' and cannot be removed. The length of the shaft part F2 of the fastener F is
The length is approximately equal to the thickness of the side back plate 71 plus the thickness of the skin. Therefore, the fastening force is relatively large, and there is almost no looseness at the fastening portion. In addition, at any position where the side support portion rotates in the seat width direction, the fastener F is not visible from the outside, and there is no problem in terms of aesthetic appearance. In this way Fuasuna F
The advantage of using this is that one-touch installation is possible and workability is excellent. Furthermore, there is a great advantage that even in the final assembly process, work can be done extremely easily from the "outside" of the seat body. Note that this fastener F can also be used as a substitute for the ohm clip OM3.

With reference to FIG. 6, an overview of the operation of the side support and the operation of the frame section will be explained. Drive shaft 4
When the side handle 1 provided at one end of the drive shaft 46 is rotated as shown in the figure, the male threaded portion 4 at the other end of the drive shaft 46
Connecting member 4 fixed to this female threaded portion 48 is driven in the direction of the arrow in the figure.
Move 9 to the left. Since the side frame 51 is rotatable around the pin 50, the rotation center C
It is rotated in the direction of the arrow in the figure (the direction in which the support narrows) around . On the other hand, by moving the connecting link 6 connected to the other end of the side frame 51 by a pin member to the right in the figure,
The side frame 51 of the side support on the other side of the backrest portion can be driven to narrow. Furthermore, it will be easily understood from the above that if the side handle 1 is rotated in the opposite direction, the both side supports will spread laterally.

Next, one embodiment of a manufacturing method for manufacturing an automobile seat by assembling the above-mentioned supports (including side supports) will be sequentially described based on the drawings starting from FIG. 7, with appropriate reference to the above-mentioned structural structure.

As is clear from the structure of the side support section described above, the side pad and back pad (including both the main back pad and the back pad) are separated in advance, and the structure includes a drive unit for driving the side support and a drive unit for driving the side support. It can be separated from the driven unit. In one embodiment, based on this premise, the process is comprised of a seat subassembly assembly process, a trim assembly assembly process, a connection assembly process, and a completion process (hereinafter, for example, the seat subassembly assembly process is (This may be abbreviated as "process," and the same applies to other processes.)

The seat subassembly assembly process is roughly as follows -
It consists of (a) and -(b).

-(A); Mechanical members are attached to the prepared seat back frame 3. That is, the S spring 7, the knuckle plate 8, the frame of the head support part, the shaft member, various reinforcing metal fittings, etc. are attached to the seat back frame with appropriate fixing means, and the frame part of the lumbar support (drive part ) and side support drive units are incorporated. The installed and installed state corresponds to that shown schematically in FIG. The side support drive unit includes all the mechanisms related to the side support except for the side frame 51, which is a mechanical component of the driven unit.

−(B); Next, attach the back pad BP to the seat back frame structure BF equipped with this mechanical member.
(Fig. 7) is attached. This back pad
BP is main back pad 72 and back pad 4
2 (see FIG. 4) are integrally formed, and are manufactured in advance to conform to the shape of the backrest portion of the seat. It is made of a sponge-like elastic material, the shape of which is best indicated by the reference BP in the schematic exploded view of FIG. The seat subassembly is constructed by the above.

The trim assembly assembly process is roughly as follows -(a),
Consists of -(b), -(c) and -(d) sub-processes.

-(a); The edge of the seat trim 73 and the vicinity of one edge of the side skin 76 are sewn. More specifically, the trim skin 7 of the seat trim 73
3', trim pad 73'' and trim lining 7
Both ends of 3 (same as the other side support part) and the outer skin 7 which is just a piece of fabric
6 and a part separated by an appropriate length from the end to make it integral. The sewing locations are indicated by ●---● in Figure 8. Also, at this stage, the side skin 76 is attached to the side pad 7.
It should be noted that 0 is not deposited. The sheet formed in this state is referred to as the outer skin OS as shown in FIG.

In addition, in this small process of -(a), the trim skin 73' and the side skin 76 of the seat trim 73 are
Each part is independent from the other, and they are sewn together during the work process so that they become one piece. However, originally the skin 73' and the side skin 76 were integrated;
That is, it may be a single continuous piece of fabric (of course formed into a predetermined shape). This has the advantage of simplifying the work process.

-(B); The side frame pull plate 71 is fixed to the base 56 (see FIG. 5) of the side frame 51 as a member. The fixing method may be, for example, spot welding. This side frame plate 71 has a plate shape with a substantially V-shaped cross section, and a side pad 70 is provided thereon. Although the member 51 is named a side frame, a combination of this side frame 51 and the side frame plate 71 can also be functionally called a side frame SF (FIG. 7).

-(C); Next, place the side pad 70 on the side frame and fix it by adhering it with an adhesive or the like.

-(d): This is the step of stretching the side skin 76 and fixing its ends. Preferably, the side skin 7
6 is glued to the side pad 70. Then, as shown in FIG. 8, the end portion of the side skin 76 corresponding to the inside of the seat and the end portion of the side frame plate 71 are fastened together using, for example, an ohm clip OM1. After that, the side skin 76 is wrapped around the side pad 70 to cover its surface (including the edge of the side pad that forms the narrow gap 74, of course), while also wrapping the edge of the side frame plate 71 on the outside of the seat. , and the middle of the side skin 76 (that is, there is still some remaining fabric) are fixed by the ohm clip OM2. The remaining epidermis 7 from this ohm clip OM2
6' is left in a so-called hanging state. Furthermore, a fastener F as shown in FIG. 4 may be used instead of the ohm clip OM2. Fastening can be achieved with just one touch, providing excellent workability. In this way, a trim assembly is constructed.

It will be clearly understood that the steps for obtaining this trim assembly and the steps for obtaining the seat subassembly may be separate and independent. In other words, instead of sequentially forming a complete structure on the same flow line, these structures may be assembled on separate lines and then combined. This exhibits an excellent advantage in terms of workability.

As described above, the connection assembly process is a process of combining both structures. That is, the side frame 51 is attached to the side frame support plate 54 at the rotation center C.
(See Figure 4). Further, the connecting member 49 and the hole 52 are connected by a pin 50, and the connecting link 6 is connected by being pivotally supported in the hole 55.
Thereby, the driving unit and the driven unit of the side support are integrally connected.

In the completion process, the outer skin 76' (No. 8
(better shown in Figure 9) with the back pad 42
(preferably by gluing) along the outer surface of the side frame support plate 54, and its free end is attached to the side frame support plate 54 using an ohm clip OM3.
Attach to. It also includes other processing, such as processing for providing a backboard 79 and the like. As clearly shown in FIG. 9, the side frame support plate 54 has a surface 54a formed along a substantially horizontal plane to which the side frame 51 is attached.
, a surface 54b that is substantially perpendicular to this surface and runs parallel to the back of the backrest portion, and a surface 54c that is gently curved and can be fixed to the outer surface of the seatback frame 3. Surface 54b collates with the back surface of back pad 42, and preferably back pad 42 is adhered to this surface. A hole 54d is previously formed at the end of the surface 54b, and the end of the skin 76' is fixed here by an ohm clip OM3 through the hole 54d.

Also, instead of the ohm clip OM3, the 4th B
A fastener F as shown in the figure may also be used. It has the advantage of being easy to work with and can be fastened with one touch.

On the other hand, the end portion 42' of the back pad 42 is formed in advance so as to be oblique to the knuckle plate 8 (Fig. 9), and the outer skin 76'' partially along this portion has one end attached to the ohm clip OM2. The other end is fixed with a bead 78.The skin 76'' of this part is not glued to the end 42', but is loosely sagged so that it can be flexible as the side support rotates. be put into a state. As shown by the two-dot chain line in Fig. 4, the skin 76'' is connected to the ohm clip slightly before the position where the rotation of the side support is narrowed.
It is stretched between OM2 and bead 78.

Incidentally, as mentioned in the sub-step -(a), if the outer skin 76 and the outer skin 76' are made of continuous and integral fabric from the beginning, there is an advantage that the work efficiency is high. Furthermore, if the fastener F as described above is used, work efficiency can be significantly improved, and work can be done from outside the sheet, which has the advantage of eliminating the inconvenience of being restricted before and after the process. However, even if it is not a continuous fabric, Ohm Clip OM2
It is also possible to separate the side skin 76 up to the edge 78 or the skin up to the bead 78 (76' and 76'' combined) and the skin 76' that covers the back pad 42. Such modifications will be understood by those skilled in the art. If so, it can be easily modified.

The above embodiments all relate to side supports, but as described above, the embodiments relate to thigh supports as well. The seat may also be provided with a head support. This will be clear with reference to FIG. 2, FIG. 3, and FIG. 7, and the explanation is omitted here since it is not the main part. Similarly, the seat may be provided with a reclining mechanism.

Further, in the embodiment shown in FIG. 2, a seat on the driver's seat side of a front seat for a passenger car is illustrated. Of course, you can also use the seat on the passenger side. However, in this case, the drive unit of the side support such as the side handle 1 is arranged on the window side of the automobile. Furthermore, it is not limited to the front seat, and may be used for the rear seat. If this is generalized further, it will be understood that it is not limited to automobile seats in particular.

In other words, vehicles such as trains, airplanes,
A seat on a bus, etc. Further, those skilled in the art will easily understand that the technical idea of the present invention can be applied to seats for theaters and homes.

As described in detail above, according to the present invention, it is possible to obtain an automobile seat equipped with a support device that eliminates tension in the skin and rotates smoothly without increasing costs. Moreover, since this support device has a relatively simple structure, the assembly work is easy and the assembly process can be simplified. This contributes to improved workability and has great cost benefits. Therefore, if the present invention is applied, a seat equipped with a support device can be installed in not only luxury cars but also ordinary passenger cars (so-called mass-market cars).

[Brief explanation of drawings]

Fig. 1 is a perspective view of an automobile seat equipped with a side support device and a thigh support device, Fig. 2 is a schematic perspective view of an embodiment, Fig. 3 is a schematic perspective view of the seat frame and support device structure, and Fig. 4 is a side support Figure 4A is a diagram showing another example of the skin attachment part, Figure 4B is a detailed sectional view of the skin attachment part, Figure 5 is an exploded view of the structure of the side support part, and Figure 6 The figure is an explanatory diagram of the operation of the side support, part 7.
The figure is an exploded view for explaining the assembly, and FIGS. 8 and 9 are sectional views of main parts for explaining the assembly method. 1... Side handle, 3... Seat back frame, 4... Support bracket, 8... Knuckle plate, S... Side support, B... Backrest, OM
1 ~ OM3...Ohm clip, F...Fasuna, 4
2... Back pad, 42'... Back pad end,
46... Drive shaft, 47... Male threaded portion, 48... Female threaded portion, 49... Connection member, 50... Pin, 51... Side frame, 54... Side frame support plate,
56... Base, 70... Side pad, 71... Side back plate, 72... Main back pad, 73...
Seat trim, 73'...trim skin, 76...side skin, 76', 76''...skin, BP...back pad, BF...seat back frame structure, OS...outer skin body, SF...side frame.

Claims (1)

[Claims] 1. A side support device is provided on the side of the backrest and/or the seat and rotates in the width direction of the backrest and/or the seat to support the side of the occupant. The structure of the automobile seat includes a main pad provided on the backrest portion and/or the seat portion of the seat portion, and a side pad of the side support device, and the side pad is attached to the main pad at the side portion of the seat. The backrest portion and/or the seat surface portion of the seat portion is supported by a side support device so as to be rotatable relative to the main pad, with a gap between the main pad and the main pad. The skin and the skin of the side support device are integrally formed, and the skin corresponding to the side surface of the side pad is loosely sagged, and the skin is folded in the above-mentioned gap and pulled inward, and the retracted end is placed on the side. At the same time, the loose free end of the outer skin is wrapped around the back of the main pad, and the outer skin is fixed in the gap as the side support device rotates. 1. A structure of a car seat having a support device configured to sag or expand. 2. Method for manufacturing an automobile seat having a side support device that is provided on the side of the backrest and/or the seat and rotates in the width direction of the backrest and/or the seat to support the side of the occupant. In this method, the main pad provided on the backrest portion and/or the seat portion of the seat portion and the side pad of the side support device are separated in advance, and a drive unit for driving the side support device and the main pad provided on the seat surface portion of the seat portion are separated in advance. The structure is such that it can be divided into a driving unit and a driven unit that is driven by the driving unit, a mechanical member is attached to the frame of the seat to form a frame structure, and the main pad is attached to the frame structure to form a seat subassembly. Seat sub-assembly assembly process, and the back side of the side pad, in which the end of the seat trim and one part of the skin to cover the side pad are joined to form an outer skin, and the components of the driven unit are fixed. A trim assembly is provided in which a side pad is provided on a frame to support the trim assembly, the side skin of the outer skin body is stretched on the side pad, and then fixed at the end of the side pad to form a trim assembly. a connecting step of rotatably connecting the driven unit to the driving unit; and providing an outer skin loosely from one fixed end of the side pad toward the back of the main pad. A method of manufacturing an automobile seat comprising a support device, further comprising a final step of providing an outer skin to cover the main pad and fixing an end portion of the outer skin to a part of the frame of the seat.