JP2013203090A - Bezel structure of seat back - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the following problems: when a patch is high-frequency welded to a rear surface of a trim cover to install a bezel, it is difficult to install the bezel on a sewn end, and the position of the bezel may restrict design.SOLUTION: A bezel 30 including a synthetic resin inner bezel 32 and a synthetic resin outer bezel 34 is attached to an opening 20 formed in a shoulder of a seat back. The sewn ends of a trim cover 24 are folded back laterally from the seam thereof, and insertion holes 24a are formed in the folded back portions of the sewn ends and the trim cover overlapping the folded back portions. Rods 34a are suspended from the lower surface of the outer bezel, and fitted to mounting holes 32a in the upper surface of the inner bezel through the insertion holes 24a of the overlapped trim cover. The outer bezel 34 is put on the inner bezel 32 via the folded back portions of the trim cover and the trim cover overlapping the folded back portions.

Description

  The present invention relates to a bezel structure for a strap that locks off a forward-backable seat back.

  A vehicle seat having a seat cushion and a seat back that can be moved forward is provided at the rear end of the seat cushion, and this type of seat is mainly used for a rear seat. The space (luggage room) will be expanded to accommodate long items such as skis.

  The seat back that can be moved forward is normally locked in its upright position by a lock mechanism. When the strap is pulled out (towed), the lock mechanism is unlocked (locked off) and a tension spring, torsion spring, etc. It is configured to be moved forward under a spring force (for example, Japanese Patent Application Laid-Open No. 2008-296686). An opening through which the strap for lock-off is inserted is formed in the shoulder opening (upper end) of the seat back, and the strap extends through the opening.

  The strap is pulled out repeatedly for lock-off, but when the strap is pulled out, the strap does not touch the seat pad (foam molding material) or trim cover (skin material) of the seat back and press to damage the seat pad or trim cover. In general, a bezel is attached to the opening to avoid contact between the strap, the seat pad, and the trim cover. For example, the bezel has an inner bezel and an outer bezel, both of which are formed from a synthetic resin in an elliptical or rectangular frame shape with a long hole, and the inner bezel is embedded in the seat pad. A rod hangs down from the lower surface of the upper, lower, left and right frame portions of the outer bezel, and a fitting hole corresponding to the upper surface of the inner bezel is formed with an insertion hole corresponding to the trim cover.

The rod on the lower surface of the outer bezel is fitted into the mounting hole on the upper surface of the inner bezel through the insertion hole of the trim cover, and the bezel is attached to the opening of the seat back by covering the inner bezel with the outer bezel through the trim cover. The strap extends from the long hole in the bezel.
Here, if the strap is repeatedly pulled out through the bezel, the trim cover may be damaged around the insertion hole. Therefore, in order to reinforce the periphery of the insertion hole and prevent damage to the trim cover, a patch made of a vinyl film having a shape corresponding to the shape of the inner bezel and outer bezel is welded to the trim cover from the back side (for example, JP, 2003-170767, A).

JP 2008-296686 A JP 2003-170767 A

The trim cover is formed by sewing the ends of the skin pieces, and a stitching terminal called a hail line is formed on the back surface of the trim cover to form a stepped shape.
By the way, a patch for reinforcing the periphery of the insertion hole is high-frequency welded to the back surface of the trim cover. However, high-frequency welding is a process performed on a flat surface without a step, and if high-frequency welding is performed on a stepped line with a step, it may spark and burn, or a thread break may occur. For this reason, it is difficult to provide a bezel on the back of the trim cover with high frequency welding on the back of the trim cover.It is difficult to place the bezel on the hail line. This hinders the free design of the seat back structure.
An object of the present invention is to provide a bezel structure for a seat back that can be placed on a hook line.

In the present invention, in the stitching terminal in which the ends of the skin pieces forming the trim cover are sewn, the stitching terminal is folded back and forth from the seam to provide a folded layer.
That is, according to the first aspect of the present invention, when the bezel is attached to the opening formed in the seat back and pulled out, the lock mechanism that locks the seat back in the upright position can be locked off and the seat back can be moved forward. The bezel extends through the bezel, the bezel has an inner bezel molded from a synthetic resin and embedded in the seat pad, and an outer bezel molded from a synthetic resin and placed on the inner bezel through the trim cover. In the stitching terminal in which the ends of the skin pieces forming the trim cover are sewn, the stitching terminal is folded back from the seam to the left and right, and the outer bezel is put on the inner bezel through the folding and the trim cover overlapping therewith.
According to the second aspect of the present invention, when the bezel is attached to the opening formed in the seat back and pulled out, the lock mechanism that locks the seat back in the upright position can be locked off and the seat back can be moved forward. The bezel has an inner bezel molded from a synthetic resin and embedded in a seat pad, and an outer bezel that is molded from a synthetic resin and is placed on the inner bezel through a trim cover. A plurality of rods hang down from the lower surface of the outer bezel, and a fitting hole corresponding to the upper surface of the inner bezel is formed with an insertion hole corresponding to the trim cover, so that the ends of the skin pieces forming the trim cover are sewn together. At the stitched terminal, the stitched terminal is folded back and forth from the seam, and the folded and overlapped The insertion holes for the rods are respectively formed in the trim cover, the rod on the lower surface of the outer bezel is inserted through the insertion hole of the trim cover and fitted into the fitting hole on the upper surface of the inner bezel, and the outer bezel is attached to the trim cover. It is put on the inner bezel through the folding and overlapping trim cover.

  In the present invention, the stitching end of the skin piece forming the trim cover is folded back to the right and left from the seam, the trim cover is overlapped by folding and the trim cover is reinforced around the insertion hole, and a patch for reinforcement is provided. Even without it, the trim cover can secure the necessary strength. This eliminates the need for reinforcing patches and eliminates the need for high-frequency welding, which is limited to processing on flat surfaces.Therefore, the bezel can be placed on the hook line and the seat back structure is not restricted by the position of the bezel. Design becomes possible.

The bezel structure which concerns on one Example of this invention shows the perspective view from the back of the vehicle seat provided in the shoulder opening of the seat back. FIG. 2 shows a longitudinal sectional view of a bezel structure according to an embodiment of the present invention along line AA in FIG. 1. The partial rear view of the trim cover in a sewing terminal is shown.

  A bezel is attached to an opening formed in the seat back. When the bezel is pulled out, a strap that locks off the lock mechanism that locks the seat back in an upright position and allows the seat back to be moved forward extends through the bezel. The bezel is composed of a combination of an inner bezel molded from a synthetic resin and embedded in a seat pad, and an outer bezel molded from a synthetic resin and placed on the inner bezel through a trim cover. A plurality of rods hang down from the lower surface of the outer bezel, and a fitting hole corresponding to the upper surface of the inner bezel is formed with an insertion hole corresponding to the trim cover, and the ends of the skin pieces forming the trim cover are sewn together. In the suturing terminal, the suturing terminal is folded back to the right and left from the seam, and the insertion hole for the rod is formed in the folded and overlapping trim cover. Then, the rod on the lower surface of the outer bezel is inserted into the mounting hole on the upper surface of the inner bezel through the insertion hole of the trim cover, and the outer bezel is put on the inner bezel through the trim cover folded and the trim cover overlapping therewith. Yes.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a rear perspective view of a vehicle seat in which a bezel structure according to an embodiment of the present invention is provided at a shoulder of a seat back, and FIG. 2 is an embodiment of the present invention along the line AA in FIG. The longitudinal cross-sectional view of the bezel structure which concerns on an example is shown, respectively.

As shown in FIG. 1, the vehicle seat 10 includes a seat cushion 12 and a seat back 14 that is provided at the rear end of the seat cushion and can be tilted forward. The seat back is locked in an upright position by a lock mechanism (not shown). When the strap 16 is pulled out (pulled), the lock mechanism is unlocked (locked off) and forwardly moved under a spring force such as a tension spring or a torsion spring. A configuration in which the lock mechanism is locked off when the strap 16 is pulled out is known, for example, as described in Japanese Patent Application Laid-Open No. 2008-296686.
By pulling out (pulling) the strap 16, the seat back can be moved forward from the rear of the seat back 14, and by operating the lever 18 a of the reclining device 18 on the side of the seat back, the seat back can also be moved forward from the front of the seat back. it can.

  As can be seen from FIG. 2 in addition to FIG. 1, an opening 20 is formed in the shoulder opening (upper end) of the seat back, and a strap 16 for lock-off is inserted through this opening and extends through the opening. Yes. When pulling out the strap, the bezel 30 is attached to the opening so that the strap does not touch and press the seat pad (foam molding material) 22 and the trim cover (skin) 24 of the seat back to damage the seat pad and the trim cover. The seat pad and trim cover are protected. In the embodiment, the opening 20 of the seat back shoulder is provided on the trim cover hail line 24c.

  The bezel 30 has an inner bezel 32 and an outer bezel 34 both formed from a synthetic resin in an elliptical or rectangular frame shape with a long hole from which the strap 16 extends, and the inner bezel is embedded in the seat pad 22. Yes. The rod 34a hangs down from the lower surface of the upper, lower, left and right frame portions of the outer bezel, and the fitting hole 32a corresponding to the upper surface of the inner bezel and the insertion hole 24a corresponding to the trim cover are formed.

  FIG. 3 shows a partial rear view of the trim cover at the suture terminal. The trim cover 24 for the seat back 14 is formed in a lower open bag shape in which a plurality of skin pieces are sewn and covered with the seat back. As shown in FIG. 3, the trim cover 24 is formed by sewing the ends of two skin pieces 24b1, 24b2 or 24b1, 24b3, and a stitching terminal 24c called a hook line is formed on the back surface of the trim cover. Is done.

  The XX cross-section of FIG. 3 is the cross-section of the skin piece 24b1 constituting the shoulder of the trim cover, and the cross-section of the skin piece 24b3 constituting the back, and the Y1-Y1 cross-section is the cross-section of the skin pieces 24b1 and 24b2 constituting the shoulder. Each of the skin piece terminals is left with a peeling line (stitching terminal) 24c on the back surface of the trim cover.

  In the present invention, in the stitching terminal of the trim cover (skin piece), the stitching terminal is folded back left and right from the seam. That is, as can be seen from the Y2-Y2 cross section and the Y3-Y3 cross section, the skin pieces 24b1, 24b2 constituting the shoulder of the trim cover are folded back left and right from the seam, and the folded back 24d is a long hole through which the strap 22 is inserted. The frame 24d1 is left in the center and extends across the hook line 24c, and through holes 24a through which the rods 34a on the lower surface of the outer bezel are inserted are formed in the upper, lower, left and right frame portions. Here, the folding 24d is provided at a position where the long hole 24d1 is aligned with the opening 20 of the seat back shoulder opening. Note that a long hole 24d1 and an insertion hole 24a are also formed in the trim cover (skin piece) that overlaps with the turn 22d.

  If the skin pieces 24b1 and 24b2 are cut while leaving the portion corresponding to the turn 24d at the end of the skin piece, the folds are formed on the left and right of the seam by stitching the ends of the skin pieces 24b1 and 24b2. There is no difficulty without increasing the number of parts and processing steps.

  In the embodiment, the bezel 30 is provided in the opening 20 of the seat back shoulder opening formed across the hook line 24c. That is, the trim cover folding back 22c is provided so that the long holes 24d1 are aligned with the opening 20, and the inner bezel 32 of the bezel is embedded in the seat pad 22 below the trim covering folding. Then, as shown in FIG. 2, the rod 34a on the lower surface of the outer bezel is inserted through the trim cover fold 24c and the corresponding insertion hole 24a formed in the trim cover (skin piece) overlapping the fold back, When the outer bezel 34 is fitted into the fitting hole 32a, the outer bezel 34 is put on the inner bezel 32 via the trim cover 24, more specifically, the trim cover folding 24d and the trim cover overlapping therewith.

  As can be seen from the number and position of the insertion holes 24a in FIG. 3, one rod 34a on the lower surface of the outer bezel is provided on each of the front, rear, left and right frame portions, but the number and arrangement of the rods are not limited thereto. Further, although the fitting hole 32a on the upper surface of the inner bezel is a through hole, it may be a bottomed hole.

In this way, the outer bezel 34 is placed on the inner bezel 32 from the folded back 24d folded from the seam to the left and right at the stitching terminal of the trim cover, and the trim cover 24 sandwiched between the outer bezel and the inner bezel is doubled. The trim cover is reinforced around the insertion hole 24a. Therefore, even if there is no reinforcing patch, the trim cover 24 can ensure the required strength, and even if the strap 16 is repeatedly pulled out via the bezel 30, damage to the trim cover 24 around the insertion hole 24a is prevented. The
Since the trim cover 24 is strengthened by folding it back and the necessary strength is secured, it is not necessary to consider high-frequency welding that is limited to processing on a flat surface without a patch. It is possible to freely design a seat back structure that is not restricted by the position of the bezel.
Further, since the patch is not required and the number of parts is reduced and the high frequency welding is not required and the number of processing steps is reduced, the cost can be reduced.

  As described above, according to the present invention, the trim cover can ensure the necessary strength even without a patch, and a bezel structure of a seat back that can be arranged on a hook line is obtained.

  The above-described embodiments are for explaining the present invention, and are not intended to limit the present invention. All modifications, alterations, etc. within the technical scope of the present invention are included in the present invention. Needless to say.

  For example, in the embodiment, the trim cover is folded back to the right and left from the seam at the stitching terminal of the trim cover to make the trim cover double (two layers). However, the folding back of the trim cover is not limited to this, and may be overlapped more than double. For example, the folding back may be folded back in the stitch direction to be triple (three layers).

  The present invention is generally applied to a vehicle seat having a forward-backed seat back, but is not limited to this. For example, a seat of a train, an airplane, etc., as well as a theater or concert venue where the seat back can be advanced forward. It can also be applied to such sheets.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 14 Seat back 16 Lock-off strap 20 Seat back shoulder opening 22 Seat pad 24 Trim cover 24a Insertion hole 24b1-24b3 Skin piece 24c Hagi line (sewing terminal)
24d Folded 24d1 Long hole 30 Bezel 32 Inner bezel 32a Fitting hole 34 Outer bezel 34a Rod

Claims (2)

A bezel is attached to the opening formed in the seat back,
When pulled out, a strap that locks off the locking mechanism that locks the seat back in the upright position and allows the seat back to be moved forward extends through the bezel,
The bezel has an inner bezel molded from synthetic resin and embedded in the seat pad, and an outer bezel molded from synthetic resin and put on the inner bezel through the trim cover,
A seat back bezel structure in which the end of the skin piece forming the trim cover is sewn, and the end of the seam is folded back and forth from the seam, and the outer bezel is placed on the inner bezel via the folded and overlapping trim cover. . A bezel is attached to the opening formed in the seat back,
When pulled out, a strap that locks off the locking mechanism that locks the seat back in the upright position and allows the seat back to be moved forward extends through the bezel,
The bezel has an inner bezel molded from synthetic resin and embedded in the seat pad, and an outer bezel molded from synthetic resin and put on the inner bezel through the trim cover,
A plurality of rods hang down from the lower surface of the outer bezel, and a fitting hole corresponding to the upper surface of the inner bezel is formed with an insertion hole corresponding to the trim cover, respectively.
In the stitching terminal in which the ends of the skin pieces forming the trim cover are sewn together, the stitching terminal is folded back and forth from the seam, and the insertion hole for the rod is formed in each of the folded and overlapping trim covers.
The rod on the lower surface of the outer bezel is inserted through the insertion hole of the trim cover and is fitted into the fitting hole on the upper surface of the inner bezel. Back bezel structure.

Images