JP2016150658A - Seat frame and vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat frame which inhibits weight increase while securing rigidity and achieves high producibility, and to provide a vehicle seat.SOLUTION: A seat back frame 1 is a frame work of a vehicle seat and includes left and right side frames 22 which extends in a predetermined direction, are separated from each other in a seat width direction, and are made of a metal. The seat back frame 1 has an upper frame 21 which is formed in at least a part of a portion connecting the left and right side frames 22, integrally molded with the side frames 22, and made of a resin.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a seat frame and a vehicle seat, and more particularly to a seat frame including a metal material and a resin material, and a vehicle seat including a seat frame.

In recent years, in order to improve the fuel efficiency of a vehicle, a vehicle seat is formed of a resin material such as plastic from a part of or all of a seat back frame or a seat cushion frame made of a high-strength metal material. There are some that are reduced in weight.
As described above, it has been proposed to form a seat frame with a resin having a double wall structure as a vehicle seat frame capable of securing strength while realizing weight reduction (see Patent Document 1).

  More specifically, Patent Document 1 describes that a seat frame including a seat cushion frame and a seat back frame is formed into a double wall structure by blow molding a resin to ensure strength. Yes.

JP 2001-231654 A

However, like the seat frame described in Patent Document 1, it can be reduced in weight by being molded with resin, but the resin only has a double wall structure against an impact applied to the seat frame in the event of an accident. However, it was difficult to secure sufficient rigidity.
In the case where the seat frame is constituted by only the resin, blow molding is possible. However, when other materials are provided, a separate joining operation is required, and the manufacturing efficiency is low.
For this reason, it is possible to increase the rigidity and suppress the deformation of the seat frame due to an impact in the event of an accident, while it is possible to increase the manufacturing efficiency while suppressing the weight increase of the seat frame and improving the fuel efficiency. Technology was highly desired.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a seat frame and a vehicle seat that can suppress an increase in weight while ensuring rigidity and have high manufacturing efficiency. It is in.

  The subject is a seat frame that is a framework of a vehicle seat, and includes a first frame and a second frame that extend in a predetermined direction and are spaced apart from each other in the seat width direction, and the first frame and the second frame. This is solved by having a resin member formed in at least a part of the portion connecting the two and integrally formed with the first frame.

  According to the above configuration, since the resin member is formed on at least a part of the portion connecting the first frame and the second frame, an increase in weight can be suppressed while ensuring rigidity. Can be easily joined together with the first frame, and manufacturing efficiency can be increased.

The resin member preferably connects the first frame and a member made of a material different from the material of the first frame.
According to the above configuration, a member made of a different material that is not suitable for welding joining due to the occurrence of electrolytic corrosion can be suitably connected to the first frame by the resin material.

A central member positioned between the first frame and the second frame, the central member being integrally formed with the resin member, the resin member being attached to the first frame and the second frame; It is preferable that the connection is made via
According to the above configuration, since the resin member is integrally formed with the central member, the central member can be connected to the first frame and the second frame without using welding, rivets, or the like, so that the manufacturing efficiency can be improved. It can be assembled with high accuracy because there is no thermal distortion.

In particular, the central member is preferably a support member that supports a seated person's body.
According to the above configuration, since the support member that supports the body of the seated person can be connected to the first frame and the second frame without using welding, rivets, or the like, manufacturing efficiency can be increased, and thermal distortion can be achieved. Since there is no, it can be assembled with high accuracy.

In addition, an introduction hole is formed in a connection portion of at least one of the first frame and the second frame with the resin member, and the resin member passes through the introduction hole and has a peripheral edge of the introduction hole. It is preferable that it is formed so as to spread.
According to the above configuration, the connecting portion of the resin member is formed in the same shape as the shape in which the rivet is pressed and deformed, so that the resin member is firmly attached to at least one of the first frame and the second frame integrally formed. It will be fixed.

The seat frame is preferably a frame in which at least a part of the first frame and the second frame are joined to the resin member by insert molding.
According to the above configuration, the seat frame can be easily manufactured by integrally molding at least a part of the first frame and the second frame and the resin member by insert molding.

The seat frame is a seat back frame, the central member is a metal upper frame, and the upper frame is integrated with the first frame and the second frame via the resin member. It is preferable that it is connected to.
According to the said structure, a seated person can be supported suitably by making the upper frame which needs high rigidity in supporting a seated person metal.

Further, the seat frame is a seat back frame, the resin member is an upper frame, the upper frame has a headrest guide for guiding a pillar protruding from a headrest, and the headrest guide includes the upper frame. It is preferable that it is integrally formed with.
According to the said structure, manufacturing efficiency can be improved by forming a headrest guide integrally with an upper frame.

The problem is solved by providing the seat frame, a cushion pad provided on the seat frame, and a skin material that covers the cushion pad and is attached to the seat frame.
According to the above configuration, the first frame and the second frame are integrally formed with the resin member while suppressing the increase in weight by providing the resin member in a part of the frame by including the seat frame. These can be easily joined, and a vehicle seat with high production efficiency can be provided.

According to the seat frame according to the present invention, it is possible to suppress an increase in weight while securing rigidity, and it is possible to increase manufacturing efficiency.
Moreover, it becomes possible to connect suitably the dissimilar material which is not suitable for welding joining by the occurrence of electrolytic corrosion.
Further, the resin member can be firmly fixed to at least one of the integrally formed first frame and second frame.
Moreover, a seated person can be supported suitably by making a top frame metal and improving rigidity.
Moreover, manufacturing efficiency can be improved by forming the headrest guide integrally with the upper frame.
In addition, it is possible to provide a vehicle seat with high manufacturing efficiency while suppressing an increase in weight.

1 is a schematic perspective view of a vehicle seat according to a first embodiment. It is a schematic perspective view which shows the seat frame which concerns on 1st Embodiment. It is a schematic perspective view which shows the seat back frame which concerns on 1st Embodiment. (A) is the schematic which shows the connection part of the upper frame and side frame which concern on one example, (b) is the schematic which shows the connection part of the upper frame and side frame which concerns on another example. is there. It is the schematic which shows the connection part of the hook which fastens S spring, and a side frame. It is sectional drawing which shows a headrest guide. It is a schematic perspective view which shows the seat back frame which concerns on 2nd Embodiment. It is a schematic perspective view which shows a seat back frame provided with a dynamic damper. It is a schematic perspective view which shows the sheet lifter which concerns on 3rd Embodiment. (A) is sectional drawing which shows the XA-XA cross section of the sheet lifter shown by FIG. 9, (b) is sectional drawing which shows the sheet lifter which has another structure.

Hereinafter, a vehicle seat and a seat frame according to an embodiment of the present invention (hereinafter, this embodiment) will be described with reference to the drawings.
The seat frame according to the present embodiment is a seat frame that achieves weight reduction while maintaining rigidity and has high manufacturing efficiency. The vehicle seat includes the seat frame.

The embodiment described below is merely an example for facilitating the understanding of the present invention, and does not limit the present invention. That is, the shape, dimensions, arrangement, and the like of the members described below can be changed and improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof.
In the following description, the front-rear direction is a direction that coincides with the traveling direction of the vehicle, the width direction is a direction along the lateral width of the seat, and the up-down direction is the up-down direction of the seat. That is.

<< First Embodiment >>
A vehicle seat S and a seat frame SF according to a first embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is a schematic perspective view of the vehicle seat S according to the first embodiment, FIG. 2 is a schematic perspective view showing the seat frame SF according to the first embodiment, and FIG. 3 is a diagram according to the first embodiment. FIG. 4A is a schematic perspective view showing the seat back frame 1, FIG. 4A is a schematic view showing a connection portion between the upper frame 21 and the side frame 22, and FIG. 4B is another example. FIG. 5 is a schematic view showing a connection portion between the hook 50 for fastening the S spring 36 and the side frame 22, and FIG. 6 is a headrest guide 51. FIG.

As shown in FIG. 1, the vehicle seat S according to the present embodiment includes a seat back S1, a seat cushion S2, and a headrest S3. The seat back S1 and the seat cushion S2 are configured such that cushion pads 1a and 2a are disposed on the seat frame SF and covered with the skin materials 1b and 2b, respectively.
The headrest S3 has a configuration in which a cushion pad 3a is disposed on a core material (not shown) and is covered with a skin material 3b.

  As shown in FIGS. 1 and 2, the seat frame SF includes a seat back frame 1 constituting the seat back S1 and a seat cushion frame 2 constituting the seat cushion S2 as main components.

  The seat back frame 1 extends in the up-down direction and is fixed to the side frames 22 disposed on both sides in the seat width direction and the upper portion of the side frames 22 extending in the seat width direction and provided on both sides. An upper frame 21 and a lower frame 35 extending in the seat width direction and fixed to the lower portions of the side frames 22 provided on both sides are provided.

Each of the side frames 22 on the left and right sides in the seat width direction corresponds to the first frame or the second frame according to the present invention, and is formed of a metal material such as an aluminum alloy, a magnesium alloy, or carbon steel. As shown in FIG. 3, the side frame 22 has a main body 22m extending vertically and a side edge 22k that is continuous with the front, lower, and rear edges of the main body 22m and protrudes inward in the seat width direction. Is formed.
Here, the metal in the present invention means a material made of a material having rigidity higher than that of the resin. In the present embodiment, the metal is made of an aluminum alloy, a magnesium alloy, carbon steel, or the like.

  In addition, two hooks 50, which will be described later, corresponding to the resin member according to the present invention are provided on the inner side surface of the side frame 22 at the top and bottom, respectively, and each of the hooks 50 on both sides in the seat width direction has a seat width. Both ends of an S spring 36 that is stretched in the direction are attached. The S spring 36 corresponds to the central member and the support member according to the present invention.

The upper frame 21 corresponds to a resin member according to the present invention, is formed from a resin material such as carbon fiber reinforced plastic (hereinafter referred to as CFRP), and extends in the sheet width direction and has an inverted U-shaped cross section. The end portions 21a on both sides in the sheet width direction are fixed to the upper portion of the side frame 22.
Here, the resin according to the present invention may be formed of a resin material other than CFRP, for example, a glass fiber plastic or a carbon fiber plastic.
The upper frame 21 includes two mounting holes 21d for mounting a headrest guide 51 described later.

The lower frame 35 corresponds to a resin member according to the present invention, is formed of a resin material, has a long plate shape, and has left and right end portions fixed to lower portions of the side frames 22 on both sides in the seat width direction. It has a function of increasing the overall rigidity of the frame 1.
As shown in FIG. 3, the lower frame 35 is attached to the lower rear surface of the rear side edge 22 k of the side frame 22. More specifically, the lower frame 35 is continuous through the introduction holes 22i formed in the rear side edge 22k on both ends in the seat width direction. The lower frame 35 has an expanded portion 50b at a portion that contacts the front surface through the introduction hole 22i in the rear side edge 22k, and is fixed to the side frame 22 in a rivet shape as will be described later.

4 and FIG. 5 for connecting portions of the metal material such as the side frame 22 or the lower frame 37 described later and a resin member such as the upper frame 21, the hook 50, the lower frame 35, or the resin connecting portion 38. Details will be described with reference to FIG.
As shown in FIG. 4, a plurality of introduction holes 22 i are formed in the thickness direction of the main body 22 m and the side edges 22 k in the connection portion of the side frame 22 with the upper frame 21 and the lower frame 35.

When the side frame 22 is inserted into a mold and the upper frame 21, the hook 50, and the lower frame 35 are injection-molded, as shown in FIG. Depending on the shape of the mold, it is formed as an expanded portion 21b having a larger diameter than the introduction hole 22i.
As described above, the extended portion 21b having a diameter larger than that of the introduction hole 22i is formed, so that the upper frame 21, the hook 50, and the lower frame 35 sandwich the side frame 22 in the thickness direction of the rivet. It will be firmly connected.

For example, as shown in FIG. 5, the hook 50 is attached to the inner side in the seat width direction of the main body 22m of the side frame 22 in which the introduction hole 22j is formed. The hook 50 has a side on which the end portion 36a of the S spring 36 is hung on the inner side in the seat width direction, and has an extended portion 50b continuous through the introduction hole 22j on the outer side in the seat width direction with the side frame 22 interposed therebetween. It is formed in a rivet shape. Thus, the hook 50 is firmly attached to the side frame 22 in a rivet shape.
Even when the S spring 36 is deformed by a load from the seated person, the hook 50 is formed of a resin material having low hardness, so that the metal contacts with the S spring 36 or the side frame 22. Occurrence of abnormal noise due to is suppressed.

It is necessary to connect the metal material and the resin material more firmly in the vicinity of the end of the side frame 22 or the like, which is a metal material, where a particularly large external force is applied.
In this case, as shown in FIG. 4B, a continuous cover portion 21c may be formed so as to pass through the introduction hole 22i and wrap around the end portion outside of the side frame 22 and the like in the vicinity of the introduction hole 22i.

Further, the resin upper frame 21 attached to the metal side frame 22 with such a configuration has been described as having an attachment hole 21d.
Preferably, a pillar (not shown) protruding from the headrest S3 is guided and supported in the mounting hole 21d, and a resin headrest guide 51 shown in FIG. 6 is integrally formed.
Specifically, the headrest guide 51 supports the pillar with the headrest S3 via a metal bracket 51a and a cylindrical connecting member (not shown).

The bracket 51a corresponds to the central member according to the present invention, and is for increasing the rigidity at a portion that contacts a connecting member (not shown), is made of metal, and is embedded along the inner surface of the headrest guide 51. Yes.
Here, when the upper frame 21 is formed by injection molding, the headrest guide 51 may be integrally formed with the upper frame 21 with the bracket 51a inserted. Manufacturing efficiency can be improved by doing in this way.

<< Second Embodiment >>
In the above embodiment, the upper frame 21 and the lower frame 35 have been described as being formed only from resin, but the present invention is not limited to such a configuration.
The lower frame 37, the upper frame 52, and the middle frame 34 according to other embodiments will be described with reference to FIGS.
Here, FIG. 7 is a schematic perspective view showing a seat back frame 1X according to the second embodiment, and FIG. 8 is a schematic perspective view showing a seat back frame 1Y including a middle frame 34 functioning as a dynamic damper.
In the following description, the same components as those described in the first embodiment are denoted by the same reference numerals, to avoid redundant descriptions and to clarify differences.

  The seat back frame 1 </ b> X has higher rigidity than the seat back frame 1, and includes a lower frame 37 and an upper frame 52 each composed of a combination of a resin portion and a metal portion.

The lower frame 37 includes a horizontal plate 37a extending in the seat width direction, and a total of two resin connection portions 38 that support both ends of the horizontal plate 37a and are joined to the side frames 22 respectively. Yes.
The resin connection portion 38 corresponds to the resin member according to the present invention, is formed of a resin material, and is formed on the side edge 22k on the rear side of the side frame 22 by the extended portion 21b, like the lower frame 35 according to the first embodiment. It is fixed in a rivet shape.
Further, the resin connection portion 38 is an inner end portion in the sheet width direction, and a cover portion 38c is formed on the side connected to the horizontal plate 37a. Similarly to the cover portion 21c shown in FIG. 4 (b), the cover portion 38c is continuously formed so as to pass through an introduction hole 37i described later and to wrap around the upper and lower edges of the horizontal plate 37a in the vicinity of the introduction hole 37i. Yes.
The horizontal plate 37a corresponds to the central member according to the present invention, is made of a metal material, and has an introduction hole 37i penetrating in the plate thickness direction at each of both ends contacting the resin connecting portion 38. Yes. The horizontal plate 37a is supported in a state where both end portions including the introduction hole 37i are covered by the cover portion 38c of the resin connection portion 38.

  The upper frame 52 is supported by supporting a horizontal cylinder 52a extending in the seat width direction, two headrest guides 52b attached to the horizontal cylinder 52a and extending vertically, and both ends of the horizontal cylinder 52a. A total of two resin connection portions 53 respectively joined to the frame 22.

The resin connection portion 53 corresponds to the resin member according to the present invention, is formed of a resin material, has a U-shaped cross section, and is continuously formed in an L shape with the open side as an inner side. . Similarly to the upper frame 21 according to the first embodiment, the resin connection portion 53 is fixed in a rivet shape to the side edge 22k of the side frame 22 by an extended portion 21b formed larger than the introduction hole 22i.
The horizontal cylinder 52a is made of a metal material, and introduction holes 52c are formed in the front-rear direction at both ends contacting the resin connection part 53. The horizontal cylinder 52a is fixed to the resin connection part 53 in a rivet shape by an extension part 53b (see FIG. 4) formed larger than the introduction hole 52c.
The headrest guide 52b has a rectangular cylindrical shape and is joined to the peripheral surface of the horizontal cylinder 52a in a direction perpendicular to the continuous direction of the horizontal cylinder 52a.
The combination of the horizontal cylinder 52a and the headrest guide 52b corresponds to the central member according to the present invention.

According to the seat back frame 1X according to the above embodiment, the lower frame 37 includes a metal horizontal plate 37a in part, and the upper frame 52 partially includes a metal horizontal tube 52a and a headrest guide 52b. By providing for, high rigidity will be provided.
On the other hand, the seat back frame 1 </ b> X is light in weight by partially including a resin connection portion 38 and a resin connection portion 53 made of resin.

In addition, when the horizontal plate 37a and the horizontal tube 52a are made of a different metal from the side frame 22 and there is a large difference in ionization tendency, if these are directly joined, electrolytic corrosion occurs.
In this regard, in the seat back frame 1X according to the present embodiment, since the horizontal plate 37a and the horizontal tube 52a are connected to the side frame 22 via the resin connection portion 38 or the resin connection portion 53, There is no problem.

The seat back frame 1 </ b> Y shown in FIG. 8 includes a middle frame 34 between the lower frame 35 and the upper frame 21.
The middle frame 34 includes a resin plate 34a spanned between the side frames 22 and a weight 34b joined to the center of the resin plate 34a.
The resin plate 34a corresponds to the resin member according to the present invention, and is formed of a resin material. Like the lower frame 35, the resin plate 34a is fixed in a rivet shape to the side edge 22k on the rear side of the side frame 22 by the extended portion 21b. ing.
The weight 34b corresponds to a central member according to the present invention, is made of a metal material, is disposed at the central portion of the resin plate 34a, and is supported around the resin plate 34a.

Since the seat back frame 1Y includes the middle frame 34 and the middle frame 34 functions as a dynamic damper, it is possible to suppress the vibration of the seat back frame 1Y and improve the riding comfort.
In particular, since the weight 34b is supported by the resin plate 34a, the middle frame 34 is easily bent, so that vibration of the seat back frame 1Y can be further suppressed.
And since the side frame 22 and the weight 34b are connected via the resin plate 34a and are not joined directly, even if it is a dissimilar material, it prevents electric corrosion and attaches it suitably. It becomes possible.

<< Third Embodiment >>
Next, a sheet lifter 55 according to a third embodiment partially including a resin member will be described with reference to FIGS. 9 and 10.
Here, FIG. 9 is a schematic perspective view showing the seat lifter 55 according to the third embodiment, FIG. 10A is a cross-sectional view showing the XA-XA section of the seat lifter 55 shown in FIG. (B) is sectional drawing which shows the seat lifter 55 which has another structure.

  The seat lifter 55 includes a connecting rod 55c that connects the driving side link 55a, the driven side link 55b, the driving side link 55a and the driven side link 55b, and synchronizes the rotation operation, and the connecting rod 55c and the driving side link 55a. And a resin connection portion 56 for connecting the driven side link 55b.

  The drive side link 55a corresponds to the first frame according to the present invention, is a metal material, and is provided along the side frame 40 on one side in the seat width direction of the seat cushion frame 2. The drive side link 55a is partially provided with a gear portion 55p, and the gear portion 55p meshes with a pinion (not shown) that is rotated by the operation of the seated person, so that the drive side link 55a rotates up and down around the rotation center 55e.

  The driven side link 55b corresponds to the second frame according to the present invention, is a metal material, and is provided along the side frame 40 on the other side of the seat cushion frame 2 in the seat width direction. The driven side link 55b is connected to the drive side link 55a via the connecting rod 55c and the resin connecting portion 56, and is rotated up and down around the rotation center 56e in synchronization with the rotation of the drive side link 55a. .

The connecting rod 55c corresponds to the central member according to the present invention, is made of a metal material, is formed in a pipe shape, and is disposed so as to be continuous in the sheet width direction.
Both ends of the connecting rod 55c are in contact with the inner side surfaces of the drive side link 55a and the driven side link 55b in the seat width direction. The drive side link 55a and the driven side link 55b are disposed at positions sandwiched between a connecting rod 55c provided on the inner side in the seat width direction and a fastener 55d provided on the outer side in the seat width direction.
The fastener 55d is fitted on the inner surface of the connecting rod 55c, and abuts against the driving side link 55a or the driven side link 55b at a flange-like portion formed by extending one end edge in the radial direction.

The resin connection portion 56 corresponds to the resin member according to the present invention, and is formed of a resin material. The resin connection portion 56 has a function of connecting one end of the driving side link 55a and the connecting rod 55c, and the other end of the driven side link 55b and the connecting rod 55c. One is provided at each end of the connecting rod 55c. Four resin connecting portions 56 are integrally formed on the inner side in the seat width direction of the driving side link 55a or the driven side link 55b on the peripheral surface of the main body 56a and the main body 56a, and spread toward the end side. Ribs 56b having a triangular shape in side view.
Further, the resin connecting portion 56 is disposed on the outer side in the seat width direction of the driving side link 55a or the driven side link 55b, and the outer support portion 56c is in contact with the flange-like edge of the fastener 55d and the driving side link 55a and the driven side link 55b. Have
The outer support portion 56c has an L-shaped cross section and has a circular continuous shape, and has an opening on the extension of the hollow portion of the connecting rod 55c.

In the seat lifter 55 configured as described above, the resin connecting portion 56 is integrally formed with the driving side link 55a, the driven side link 55b, and the connecting rod 55c, so that it can be easily assembled without being welded. Furthermore, unlike the joining by welding, since there is no thermal distortion, it can be assembled with high accuracy.
Specifically, the main body 56a and the rib 56b joined to the connecting rod 55c by integral molding hold the drive side link 55a, the driven side link 55b, and the fastener 55d between the outer support portions 56c. Since they can be joined, they can be firmly and easily assembled.

Further, like the resin connection portion 57 shown in FIG. 10B corresponding to the resin member according to the present invention, the main body 56a, the rib 56b, and the outer support portion 56c shown in FIG. It may be formed continuously on both sides in the direction.
According to such a configuration, the resin connection portion 57 continuously covers the respective component parts, and thus can be firmly connected.

S vehicle seat S1 seat back S2 seat cushion S3 headrest SF seat frame 1a, 2a, 3a cushion pad 1b, 2b, 3b skin material 1, 1X, 1Y seat back frame 2 seat cushion frame 21 upper frame (resin member)
21a End portion 21b Expansion portion 21c Cover portion 21d Mounting hole 22 Side frame (first frame, second frame)
22i, 22j Introduction hole 22k Side edge 22m Body 34 Middle frame
34a Resin plate (resin member)
34b Weight (center member)
35 Lower frame (resin member)
36 S spring (center member, support member)
36a End portion 37 Lower frame 37a Horizontal plate (central member)
37i Introduction hole 38 Resin connecting part (resin member)
38c Covering part 40 Side frame 50 Hook (resin member)
50a Locking hole 50b Expansion part 51 Headrest guide 51a Bracket (central member)
52 Upper frame 52a Horizontal cylinder (center member)
52b Headrest guide (center member)
52c Introduction hole 53 Resin connecting part (resin member)
53b Extension part 55 Seat lifter 55a Drive side link (first frame)
55b Follower link (second frame)
55c Connecting rod (center member)
55d Fastener 55e Center of rotation 55p Gear portion 56 Resin connecting member (resin member)
56a main body 56b rib 56c outer support part 56e rotation center 57 resin connecting part (resin member)

Claims (9)

A seat frame that is a framework of a vehicle seat,
A metal first frame and a second frame extending in a predetermined direction and spaced apart in the sheet width direction;
A seat frame, comprising: a resin member formed at least in part in a portion connecting the first frame and the second frame and integrally formed with the first frame.   The seat frame according to claim 1, wherein the resin member connects the first frame and a member made of a material different from the material of the first frame. A central member located between the first frame and the second frame;
The seat frame according to claim 1 or 2, wherein the central member is integrally formed with the resin member and is connected to the first frame and the second frame via the resin member. .   The seat frame according to claim 3, wherein the central member is a support member that supports a seated person's body. An introduction hole is formed in the connection portion with the resin member in at least one of the first frame and the second frame,
The seat frame according to any one of claims 1 to 4, wherein the resin member is formed so as to spread around a periphery of the introduction hole after passing through the introduction hole.   The said seat frame is a flame | frame with which at least one part of the said 1st frame and the said 2nd frame was joined to the said resin member by insert molding, The Claim 1 thru | or 5 characterized by the above-mentioned. Seat frame. The seat frame is a seat back frame;
The central member is a metal upper frame;
The seat frame according to claim 3, wherein the upper frame is integrally connected to the first frame and the second frame via the resin member. The seat frame is a seat back frame;
The resin member is an upper frame,
The upper frame has a headrest guide for guiding a pillar protruding from the headrest,
The seat frame according to any one of claims 1 to 6, wherein the headrest guide is integrally formed with the upper frame. The seat frame according to any one of claims 1 to 8,
A cushion pad provided on the seat frame;
A vehicular seat comprising: a skin material that covers the cushion pad and is attached to the seat frame.

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