JP5126818B2 - Headrest insert - Google Patents

Description

  The present invention relates to a headrest insert, and more particularly to a movable headrest insert among vehicle headrests.

  Among the vehicle headrests, there is a movable headrest that is attached so that the pillow portion can be tilted and moved with respect to a stay supported on the upper end of the seat back. The movable headrest has been pursued to have a functional and quality stable structure that allows the pillow part to move smoothly relative to the stay. At the same time, it is required to simplify the movable mechanism, to improve ease of manufacture, improve assembly workability, and reduce costs. And the proposal which responds to such a request | requirement has been made | formed (for example, patent document 1).

JP 2003-225137 A

Patent Document 1 states that “a stay including a pair of vertical support rod portions supported by a seat back and a horizontal support rod portion connecting the both vertical support rod portions, and maintaining a predetermined frictional force on the horizontal support rod portion. A plate fixed so as to be able to swing while being molded separately from the plate by a resin material, and fixed to the plate and covering at least a part of the plate and the stay, and moving the vertical support bar portion A headrest device including a cover having a space that allows the first cover, and the cover includes a first cover, a second cover, and a link portion that rotatably links the first cover and the second cover. In addition, a headrest device characterized in that the first cover and the second cover sandwich the stay and the plate is disclosed.
Specifically, a structure in which the stay 4 is sandwiched between the first cover 2A and the second cover 3A is disclosed as an insert as shown in FIG. 9 (cover in Patent Document 1). A concave frame 23 having a concave cross section is provided on the outer periphery of the first cover 2 </ b> A in which the insert is half-shaped in a hook shape, and a through hole 23 a ₁ is provided in a part of the outer standing wall 23 a that forms the recess of the concave frame 23. On the other hand, a convex frame 33 that fits into the concave frame 23 is provided on the mating facing surface along the outer peripheral portion 31 of the second cover 3A, and a notch 34 in which a part of the convex frame 33 is cut out. The latching claw 35 is provided through (FIG. 10). Then, the first and second covers 2A and 3A are sandwiched from the front and rear by the stay horizontal portion 41 and the upper end portion of the stay vertical portion 40 so as to be swingable with respect to the stay 4 and integrated. An insert is formed (FIG. 11). More specifically, after assembling the holding plate 5 (a plate in Patent Document 1) rotatably attached to the horizontal portion of the stay 4 to the boss 24 of the first cover 2A, the stay horizontal portion 41 and the stay vertical portion to the upper end portion 40, fitting the two insert halves article 2 by sandwiching from around, the projecting portion 35b is through-hole 23a ₁ of the locking claw 35 with convex frame 33 in a concave frame 23 is fitted And integrated (FIG. 12).

However, the insert with a stay thus completed has the following problems. The insert with the stay is then foam-molded after placing the insert in the headrest foam mold and embedded in the foam 6 as a pillow body as shown in FIG. there is a problem that enters into the insert from the fitting portion between the protruding portion 35b of the locking claw 35 and the through holes 23a _1.
Referring to FIGS. 10 to 12, the engaging claw 35 is deformed by its elastic force at the fitting portion between the engaging claw 35 and the through hole 23a ₁ and is fitted into the through hole 23a ₁ (FIG. 10). ) Since the location of the through hole 23a ₁ is made one size larger so that the locking claw 35 can be easily fitted, the foaming raw material 6a that has entered the groove 23c through the through hole 23a ₁ passes through the gap. Then, it enters the insert 10 as indicated by the arrow in FIG. In the general fitting portion of the concave frame 23 and the convex frame 33, as shown in FIG. 12 (a), the convex portion 33a, base of the convex frame 33 extends from the outer vertical wall 23a of the concave frame 23 to the inner vertical wall 23b through the groove 23c. Since the end horizontal portion 33c is in contact with or close to the end horizontal portion 33c, there is no particular problem because the foaming raw material 6a is cured in the middle even when trying to enter the insert 10 by sewing the fitting gap. However, as indicated by the arrows in FIG. 10, the part that becomes the obstacle resistance is only a contact part between the inner standing wall 23b and the base horizontal part 33c as shown in FIG. Often entered 10 of them. In particular, if there is a gap in the contact portion due to manufacturing errors of the concave frame 23 and the convex frame 33, the foam raw material 6a can enter the insert 10 without difficulty during foam molding. The foaming raw material 6a that has entered then hardens, but there is no problem as long as it remains fixed to the inner wall of the insert. However, when the cured product was peeled off due to some sort of splashing, it generated a rattling noise due to vibrations during vehicle operation, leading to poor quality.
Therefore, after conventional causes fitting integrating the protrusion 35b of the locking claw 35 is fitted into the hole 23a _1, prior to the foam molding, sealed from the outside by a seal tape or the like to these fitting portions, Although the entry of the foam raw material 6a into the insert is prevented during foam molding, a labor burden due to the pretreatment and materials such as a tape are required.

  The present invention solves the above-mentioned problems and prevents the entry of foaming raw materials into the insert during foam molding without compromising the labor burden and material burden of pretreatment using materials such as tape. An object of the present invention is to provide an insert for a headrest that can stably maintain and improve productivity.

In order to achieve the above object, the gist of the invention described in claim 1 is that a concave frame is provided on the outer peripheral portion of one insert half product and a through hole is provided on the outer standing wall of the concave frame, while the other A convex frame that fits into the concave frame is provided on the outer peripheral portion of the insert half-cut product, and a locking claw is provided through a notch portion in which a part of the convex frame is notched, so that both the stays are attached. In the insert for a headrest that is integrated by fitting the through hole and the locking claw, the concave frame and the convex frame sandwiched between half of the inserts, the side end surface of the convex wall according to the locking claw The outer edge or the vicinity of the outer edge and the inner edge or the vicinity of the inner edge of the side end surface of the convex portion related to the convex frame facing each other through the notch, are connected by a thin skin-like thin wall . A front fin that is provided on the upper edge and hangs on the outer edge of the lower end surface of the outer standing wall according to the concave frame. Provided on both sides next to the horizontal direction from the site of the hole, locking pawl advances warped back side elastic deformation outward protrusion of the locking pawl while rubbing the inner surface of the outer standing wall, wherein It is possible to fit into a through hole, and the thin wall closes the notch , the upper fin is in close contact with the groove bottom of the concave frame, and the front fin is sealed at a contact portion with the convex frame. The headrest insert is characterized by the following.
The gist of the invention described in claim 2 is that the outer peripheral part of one insert half product is provided with a concave frame and the outer standing wall of the concave frame is provided with a through hole, while the other insert half product has an outer peripheral part. Is provided with a convex frame that fits into the concave frame, and is provided with a locking claw through a notch part of the convex frame, and the stay is sandwiched between both insert halves. In the headrest insert that is integrated by fitting the through hole and the locking claw, and the concave frame and the convex frame, the side end surface of the convex wall according to the locking claw, and the notch portion. Are connected by a thin-walled bellows-like thin wall, and an upper fin is provided on the upper edge of the locking claw, and the concave frame is fin before hanging on the lower end face edge of the outer standing wall provided on both sides next to the horizontal direction from the site of the hole, the Engaging pawl advances warped back side elastic deformation outward protrusion of the locking pawl while rubbing the inner surface of said outer vertical wall, and enables the fitting to the hole, the notch portion in the thin wall In the headrest insert, the upper fin is in close contact with the groove bottom of the concave frame, and the front fin is sealed at a contact portion with the convex frame .

As in the first aspect of the invention, when the thin skin-like thin wall connects the side end surface of the convex wall related to the locking claw and the side end surface of the convex portion related to the convex frame facing each other through the notch. The thin wall blocks the passage of the foaming raw material from the through hole through the notch and into the insert during foam molding, so that the foaming raw material can be prevented from entering the insert. On the other hand, the thin wall includes an outer edge or the vicinity of the outer edge of the side end face of the convex wall related to the locking claw, and an inner edge or the vicinity of the inner edge of the side end face of the convex part related to the convex frame facing through the notch. When connected, the outward projection of the locking claw rubs against the inner surface of the outer vertical wall, and the bending of the locking claw when it is warped back due to elastic deformation can be retained. Using the repellency, the fitting operation between the locking claw and the through hole can be carried out as before.
Further, when an upper fin is provided on the upper edge of the locking claw, and the upper fin comes into close contact with the bottom of the groove of the concave frame, the foaming material that has entered from the through-hole during foam molding is separated from the upper edge of the locking claw and the first half. It becomes possible to prevent entry into the insert from the gap formed in the groove portion bottom of the concave frame related to the split product, and the insert has a more preferable self-sealing structure.
In addition, if the front fins that hang on the outer edge of the lower end surface of the outer standing wall according to the concave frame are provided in the horizontal direction on both sides from the through hole portion, and the front fin is sealed at the contact portion with the convex frame, foam molding This front fin prevents the foaming raw material from entering the insert through the gap formed at the joining portion of the thin wall and the first half product at the outer region where the concave frame and the convex frame are fitted.
When the thin wall is formed in a bellows shape as in the invention of claim 2, the outward projection of the locking claw rubs against the inner surface of the outer standing wall and the locking claw warps to the back side due to elastic deformation. Therefore, it is possible to easily secure the amount of bending, and it becomes more convenient.

  Since the insert for headrest of the present invention connects the side end face of the convex wall related to the locking claw and the side end face of the convex part related to the convex frame facing the notch part, the thin wall closes the notch part. The insert has a self-sealing function that can prevent foaming raw material from entering the insert, and has excellent effects in reducing labor costs, product costs, maintaining stable quality, and improving productivity.

Hereinafter, embodiments of the headrest insert according to the present invention will be described in detail.
(1) Reference form 1
1 to 5 show one embodiment of an insert for a headrest (hereinafter simply referred to as “insert”) according to the present invention. FIG. 1 is an exploded perspective view of an insert with a stay, and FIG. FIG. 3 is an enlarged perspective view of the sealing structure, and FIG. 3 is an enlarged perspective view of the vicinity of the locking claw, which is an insert half product having a convex frame. 4 is a plan view around the locking claw of FIG. 3, FIG. 5 is a cross-sectional view of FIG. 4, and is a cross-sectional view of the convex wall of the locking claw in FIG.

As shown in FIG. 1, the insert 1 used in the headrest insert according to the present invention is an insert that is attached so as to be able to rotate the stay 4 and is embedded and integrated in the foam 6 by foam molding. Prepared as a product. Specifically, one insert half product 2 (hereinafter referred to as “first”) in which a concave frame 23 is provided on the mating facing surface 22 of the outer peripheral portion 21 and a through hole 23 a ₁ is provided in a part of the outer standing wall 23 a of the concave frame 23. A half-cut product)), and a convex frame 33 fitted to the concave frame 23 is provided on the fitting facing surface 32 of the outer peripheral portion, and a notch 34 is formed by cutting out a part of the convex frame 33. Another insert half product 3 (hereinafter referred to as “second half product”) provided with the locking claws 35 is prepared.
A thin wall 36 is further formed at the position of the notch 34 according to the second half product 3 of the present invention. A thin-walled thin wall 36 connects the side end surface of the convex wall 35a associated with the locking claw 35 and the side end surface of the convex portion 33a associated with the convex frame facing each other via the notch portion 34, thereby forming a cutout portion. 34 grooves are shielded. And while shielding the groove | channel of the notch part 34 with the thin wall 36, the thin-walled thin wall 36 is the outer edge of the side end surface of the convex wall 35a or near the outer edge, and the inner edge or the vicinity of the inner edge of the side end surface of the convex part 33a. by connecting, during mating through holes 23a ₁ and the locking claws 35, the back locking claw 35 is in elastic deformation outward protrusion 35b of the locking claw 35 while rubbing the inner surface of the outer standing walls 23a The thin wall 36 has a bending amount that can follow the sideward movement.

The first half product 2 described above is a half product having the concave frame 23, and is a resin molded product obtained by half-molding the insert product shown in FIG. 11 into a bowl shape as shown in FIGS. The first half-finished product 2 is provided with a concave frame 23 having a concave cross section on the fitting facing surface 22 along the outer peripheral portion 21, and a part of the outer standing wall 23 a that forms the recess of the concave frame 23 An elongated through hole 23a ₁ is provided along the periphery. Here through hole 23a ₁ of the form in four locations near the four corners of the recessed frame 23 in a plan view substantially square. As shown in FIG. 2, the concave frame 23 has an outer standing wall 23 a formed by extending the outer surface of the outer peripheral portion 21 of the first half product 2 as it is, and an inner surface of the inner peripheral portion of the first half product 2 as it is. The inner standing wall 23b and the groove 23c sandwiched between the two are formed. The groove 23c has a gap and a depth into which the convex portion 33a of the convex frame 33 provided in the second half product 3 is fitted. The concave frame 23 here makes the inner standing wall 23b higher than the outer standing wall 23a (see FIG. 8). Incidentally, the concave frame 23 of FIG. 10 in the through holes 23a ₁ closer, but the ribs 29 connecting the outer standing wall 23a and the inner standing wall 23b, is not provided in FIG.
Reference numeral 24 denotes a boss, and a pin stands upright at the position of the second half product 3 facing the boss. In FIG. 1, this pin is hidden behind the bowl-shaped main body 30. The pin is inserted into the boss 20 after being inserted into the through hole 52 of the plate-shaped holding plate 5. The insertion of the pin into the boss 24 is performed by the concave frame 23 and the convex frame 33. a fitting, also the fitting between the through holes 23a ₁ and the protruding portion 35b of the locking claw 35, the first halves article 2 and simultaneously the second halves article 3 are integrated. Further, when the pin is inserted into the through hole 52 of the plate-like holding plate 5, the insert 1 is formed which is swingable with respect to the stay 4 and fitted and integrated. Reference numeral 25 denotes a stay cylinder, and when the first half product 2 and the second half product 3 are integrated, the stay 4 is formed as an insert 1 with a stay 4 and is rotatably attached to the holding plate 5. The vertical portion 40 protrudes outward from the insert through the hole 25a of the cylindrical portion 25.

The second half product 3 is a half product having the convex frame 33, and is a resin molded product obtained by half-molding the insert product shown in FIG. 11 into a bowl shape as shown in FIGS. This is a half-finished product that is the counterpart of the first half-finished product 2 obtained by halving the insert product. The second half product 3 is provided with a convex frame 33 fitted to the concave frame 23 on the mating facing surface 32 along the outer peripheral portion 31 (FIGS. 3 and 4). Further, a locking claw 35 is provided in which a part of the convex frame 33 is cut out and a protruding portion 35b is protruded outward at the upper end portion of the convex wall 35a having a convex section through the cutout portion 34. The provision of the notch 34 on both sides of the locking claw 35, when the locking claw 35 is fitted into the through hole 23a _1, protrusion 35b is while rubbing the inner surface of the outer standing wall 23a of the through hole 23a _1, This is because the flexible locking claw 35 made of resin is warped to the back side by elastic deformation and smoothly moves on the inner surface of the outer standing wall 23a.
Locking claw 35 is formed in four places corresponding positions of the through holes 23a _1. And the thin wall 36 is provided in each notch part 34 which exists in the both sides of each latching claw 35 (FIG. 3). As described above, a portion of the convex frame 33 is cut out to form the cutout portion 34. By providing the thin wall 36 in the cutout portion 34, the convex shape is formed from the locking claw 35 through the thin wall 36. Continue to the frame. Thus, on the fitting facing surface 32 of the second half-finished product 3, an annular seal wall connected to the convex frame 33, the thin wall 36, the locking claw 35, the thin wall 36, and the convex frame 33 is formed. The thin wall 36 is integrally formed by molding the second half-finished product 3 together with the convex frame 33 and the locking claw 35.

As shown in FIGS. 1 to 5, the thin wall 36 stands substantially perpendicular to the bottom surface 34 c of the notch 34, and is near the upper edge or upper edge of the convex frame 33 and the locking claw 35 on both sides of the notch from the bottom surface. A thin-walled thin wall 36 covers up to the height of. 1 to 5, the upper edge of the thin wall 36 is set to a height slightly lower than the upper edges of the convex portion 33 a of the convex frame 33 and the convex wall 35 a of the locking claw 35. Therefore, the upper edge of the thin wall 36 of this embodiment corresponds to the upper edge of the convex part 33a and the convex wall 35a. During foam molding, from entering the insert 10 across foaming material 6a which submerged leaves the hole 23a ₁ in FIG. 10 is a notch 34, blocking at thin wall 36. The thin wall 36 is slightly higher than the upper edges of the convex portion 33a and the convex wall 35a, and when the first and second half products 3 are fitted and integrated, the thin wall 36 deforms itself and its upper edge When the portion is in close contact with the groove bottom 23c ₁ (see FIGS. 7 and 8) of the concave frame 23, the sealing performance is improved, which is more preferable.
On the other hand, the thin wall 36 has a thin skin shape, and connects the outer edge or the vicinity of the outer edge of the side end surface of the convex wall 35a and the inner edge or the vicinity of the inner edge of the side end surface of the convex portion 33a facing each other through the notch 34. Thus, a clearance (bending amount) that allows the locking claw 35 to warp to the back side due to elastic deformation is secured. Since the thin wall 36 has this deflection, when the two half products 2 and 3 are integrated, the fitting operation of the locking claw 35 into the through hole 23a ₁ can be performed in the same manner as the conventional product in FIG. .
A thin section that connects the outer edge or the vicinity of the outer edge of the side wall of the convex wall 35a related to the locking claw 35 and the inner edge or the vicinity of the inner edge of the side edge of the convex part 33a related to the convex frame 33 via the notch 34. wall 36 is provided, engageable into the through hole 23a ₁ locking claw 35 is advanced warped back side elastic deformation outward protrusion 35b is while rubbing the inner surface of the outer standing wall 23a of the locking claw 35 Thus, the groove of the notch 34 is closed with the thin wall 36. By closing the notch 34 with the thin wall 36, the foam raw material 6a has been prevented from entering the insert 10 across the notch 34 at the time of foam molding.

In the present embodiment, in the region of the notch 34 in FIGS. 3 to 5, the thin wall 36 is opposed to the outer edge of the side end surface of the convex wall 35 a related to the locking claw 35 via the notch 34. 33 is connected to the inner edge of the side end surface of the convex portion 33a, and the thin wall 36 obliquely cuts the cutout portion 34. FIGS. 3 to 5 show that the thin wall 36 is connected to the vicinity of the outer edge of the convex wall 35a. However, the illustration is made easy to understand, and the actual thin wall 36 is provided with a margin of the convex wall 35a so that a further margin can be obtained. Connect to the outer edge. The thin wall 36 protrudes outwardly from the inner edge of the side end surface of the convex portion 33a (the insert inner starting point) toward the outer edge of the convex end wall 35a of the locking claw 35 (the outer end point of the insert outer side). With such a configuration, when the locking claw 35 is fitted into the through hole 23a ₁ , the protrusion 35b rubs the inner surface of the outer standing wall 23a on the through hole 23a ₁ , and the locking claw 35 is elastically deformed to the back side. The thin wall 36 can be held to warp. In step before the locking claw 35 is fitted into the through hole 23a _1, but the locking claws 35 is reclined to the bullet arrow toward the rear side in FIG. 4, the side end face outer edge projecting thin wall 36 is convex walls 35a The horizontal length of the thin wall 36 is diagonally connected to the inner edge of the side end surface of the portion 33a, so that the horizontal length of the cutout portion 34 in the horizontal direction of the notch 34, that is, the convexity on both sides thereof is shown in the plan view of FIG. It becomes longer than the linear distance from the end of the frame to the end of the locking claw. The thin wall 36 has a sufficient length to be able to follow the movement of the locking claw 35 in the direction of the middle black arrow. When the locking claw 35 warps to the back side (inside the insert) as indicated by a solid black arrow, the thin wall 36 is originally arranged so as to protrude from the inner edge of the convex portion side end surface to the outer edge of the convex wall side end surface of the locking claw 35. Since it is provided, it is possible to flex and cope with the warping of the locking claw 35 toward the back side with a margin. In the locking claw 35, the protrusion 35b and the convex wall 35a warp to the back side, but the thin wall 36 is bent and follows this movement without difficulty. The thin wall 36 can follow the movement of the locking claw 35 during the fitting without stopping the movement.

The first half-finished product 2 and the second half-finished product 3 sandwich the stay horizontal portion 41 and the upper end portion of the stay vertical portion 40 from above and below, with the second half-finished product 3 facing down, 23 a ₁ and the locking claw 35, and the concave frame 23 and the convex frame 33 are fitted and integrated. When fitting integration with the through hole 23a ₁ and the locking claw 35, as described above, although the locking claw 35 is warped back side to the convex wall top with a protrusion 35b, the thin wall 36 that Following deformation toward the top, the movement of the locking claw 35 is not stopped.
Then, when both the half-cut products are fitted and integrated, the thin thin wall 36 extending from the bottom surface of the notch 34 to the height of the upper edge of the convex wall 35a and the convex 33a is the convex wall 35a related to the locking claw 35. These side end surfaces and the side end surfaces of the convex portions 33a of the convex frame 33 are connected, and the entire surface is sealed so that the cutout portions 34 cannot be crossed. Even though the thin wall 36 is thin, the thin wall 36 forms a seal wall that seals the notch 34 between the convex frame 33 and the locking claw 35. A curtain of a thin skin-like thin wall 36 is stretched around a portion of the notch 34 extending from the portion of the locking claw 35 to the portion of the convex frame 33 facing this. As a result, at the time of foam molding, foaming material 6a that has entered from the through hole 23a ₁ is also blocked by a thin wall 36 in an attempt to cross the notch 34, so as to remain within the fitting portion of the concave frame 23 and a convex frame 33 become.

The insert 1 configured as described above does not require materials such as a seal tape, which has been necessary in the past, and pretreatment work using the material. Self-sealing is realized by the thin-walled thin wall 36 formed in the second half product 3. Even if the foam raw material 6a tries to enter the insert 10 through the through hole 23a ₁ and the notch 34 by foam molding, the thin wall 36 that blocks the notch 34 stands to prevent the foam raw material 6a from entering the insert 10 To do. Since the thin wall 36 closes the passage of the notch 34 from the outside of the insert to the insert 10, even if the foam raw material 6 a passes through the through hole 23 a ₁ during foam molding, the thin wall 36 cannot enter the insert 10. No pretreatment is required prior to foam molding. In addition, since the thin wall 36 is formed into a thin skin and is integrally formed with the locking claw 35 and the convex frame 33 by the molding of the second half product 3, there is almost no increase in cost associated with the production and manufacture of the thin wall 36. Absent. The insert 1 has a very reasonable self-sealing structure.
On the other hand, the provision of the thin wall 36, there is a risk that an obstacle to the fitting operation to hole 23a ₁ of the locking claw 35, the present embodiment is a thin skin-like thin wall 36 to the locking claw 35 By connecting the outer edge of the side end surface of the convex wall 35a and the inner edge of the side end surface of the convex portion 33a related to the convex frame 33 through the notch 34, it is cleared without difficulty. The resin thin wall 36 has flexibility. However, if the thin wall 36 is disposed in a pinched state, the resin thin wall 36 cannot be bent and deformed. In the present embodiment, as shown in FIG. 4, the notch 34 is obliquely cut from the inner edge of the side end surface of the convex portion 33 a to the outer edge of the side end surface of the convex wall 35 a, from the convex frame 33 toward the locking claw 35. since there is provided a thin wall 36 which bulges outwardly towards, when the locking claw 35 is fitted into the through hole 23a ₁ warped inwardly of the inner insert, the deflection thin wall 36 is deformed (the clear) Possess. The first and second halved products 2 and 3 can be assembled and assembled into the insert 1 without changing the conventional second halved product.
Thus, when the insert 1 is completed by fitting and integrating the two half-finished products 2 and 3, the thin wall 36 is prevented from crossing the notch 34, and the foam raw material 6a is reliably prevented from entering the insert 10. Therefore, it exhibits excellent effects in maintaining stable quality and improving productivity.

(2) Reference form 2
This embodiment is a second half product 3 of another form as shown in FIG. 6 instead of FIG. FIG. 6 illustrates a plan view around the locking pawl. It replaces with the thin wall 36 of the reference form 1 , and it is set as the 2nd half product 3 provided with the thin wall 36 formed in the bellows shape with the thin skin. The bellows-like thin wall stands substantially perpendicular to the bottom surface 34c of the notch 34, as in the thin wall of the first embodiment , and is near the upper edge or upper edge of the protrusion 33a and the convex wall 35a on both sides of the notch from the bottom surface. A thin-walled thin wall 36 covers up to the height of. When fitting integration of both half parts 2 and 3, but the locking claws 35 are fitted into the through hole 23a ₁ advances warped back side elastic deformation, the thin wall 36 thereof stretch formed like bellows Due to the flexible bellows configuration, the thin wall itself has a deformation response force that allows the locking claw 35 to follow the movement of warping due to elastic deformation. Accordingly, the bellows-like thin wall 36 is a convex shape that opposes the outer edge or the vicinity of the outer edge of the convex wall side end face of the locking claw 35 like the second half product 3 of the reference form 1 through the notch 34. There is no need to provide a thin wall 36 for connecting the inner edge or the vicinity of the inner edge of the end surface of the convex portion related to the frame 33, and it simply faces the side end surface of the convex wall 35 a related to the locking claw 35 via the notch portion 34. It is only necessary to provide the bellows-like thin wall 36 that connects the side end surface of the convex portion 33 a related to the convex frame 33. Other configurations are the same as those in the first embodiment, and the description thereof is omitted. The same reference numerals as those in the reference form 1 denote the same or corresponding parts.

Insert 1 configured in this way, since the thin wall 36 is formed in a bellows shape, when the locking claw 35 is fitted into the through hole 23a ₁ warped inwardly of the inner insert, the thin wall 36 itself It possesses flexure (clearance) that deforms flexibly. As in Reference Mode 1 , in particular, the outer edge of the side end surface of the convex wall 35a associated with the locking claw 35 with the thin wall 36 and the inner edge of the side end surface of the convex portion 33a associated with the convex frame 33 opposed via the notch 34 It is not necessary to concatenate. The thin wall 36 only has to connect the side end surface of the convex wall 35a related to the locking claw 35 and the side end surface of the convex portion 33a related to the convex frame 33 via the notch 34. Other effects are the same as those of the first embodiment , and the description thereof is omitted.

(3) Embodiment 3
As shown in FIGS. 7 and 8, the present embodiment is an insert in which the upper fin 35f and the front fin 28 are added to the insert 1 of the reference form 1 (or reference form 2 ). Here, as shown in FIG. 7, the second half product 3 in which a burr-like fin (upper fin 35 f) is additionally formed over the entire upper edge of the locking claw 35 according to the first embodiment . The upper fin 35 f is integrally formed by molding the second half product 3 together with the locking claw 35, the convex frame 33, and the thin wall 36. By lies on fins 35f, holes 23a ₁ and the locking claw 35 of the two half parts 2 and 3, the concave frame 23 and a convex frame 33 is fitted is integrated in the insert 1, FIG. as of 7 (b), the upper fin 35f are in close contact seal fills the gap therebetween and elastically deformed into the groove bottom 23c ₁ of the concave frame 23. Foaming material 6a that has entered from the through hole 23a ₁ during foam molding enters into the upper edge and the insert 10 from a gap made in the groove bottom 23c ₁ of the concave frame 23 according to the first halves article 2 of the locking claw 35 Thus, the insert 1 having a more preferable self-sealing structure is obtained.

FIG. 8 shows the insert 1 in which the front fin 28 is added to the reference form 1 (or the reference form 2 ). As shown in FIGS. 1 and 8, a burr-like fin (front fin 28) is provided along the outer edge of the lower end surface of the outer standing wall 23 a related to the concave frame 23 of the first half-finished product 2. The front fin 28 is integrally formed with the concave frame 23 by molding the first half product 2. In FIG. 8, hatching indicating a cross section is omitted.
Although the thin wall 36 is provided, there is a possibility that a gap may be formed at the joint portion between the thin wall 36 and the first half-finished product 2. The front fin 28 passes through the gap formed at the joint portion between the thin wall 36 and the first half-finished product 2 during the foam molding, and enters the insert 10 through the concave frame 23 and the convex frame 33. Stop at the outer area of the fitting. Fins 28 before hanging on the lower end face edge of the outer standing wall 23a is extended from the site of holes 23a ₁ as in Figure 1 on both sides transverse horizontal direction. In the front fin 28, the foam raw material 6a at the time of foam molding passes through the fitting gap between the concave frame 23 and the convex frame 33, that is, the gap between the outer vertical wall 23a and the bottom surface 34c and the base horizontal portions 33c and 35c. A predetermined horizontal and horizontal distance is provided so as not to get over the wall 36 and enter the insert 10. Front fin 28 in combination with the previous SL on fin 35f, provided in the insert 1 of the reference embodiment 1 (or Reference Embodiment 2).

The insert 1 configured as described above is more reliably sealed at the contact portion between the upper fin 35f and the front fin 28. The foam raw material 6a can be prevented from entering the insert 10 during foam molding. In addition to the effects of the first and second embodiments, further self-sealing by the upper fin 35f and the front fin 28 can be realized.

  The present invention is not limited to those shown in the above-described embodiments, and various modifications can be made within the scope of the present invention depending on the purpose and application. Shape, size, number of first half-finished product 2, concave frame 23, second half-finished product 3, convex frame 33, notch 34, locking claw 35, thin wall 36, stay 4, holding plate 5, etc. Etc. can be appropriately selected depending on the application.

The one form of insert for headrests of reference form 1 is shown, and the exploded perspective view is shown. It is an expansion perspective view of the seal structure which concerns on the insert of FIG. FIG. 5 is an enlarged perspective view of the vicinity of a locking claw in an insert half product having a convex frame. FIG. 4 is a plan view around the locking claw of FIG. 3. It is a cross-sectional view in the substantially intermediate height position of the convex wall which concerns on the latching claw in FIG. In Reference Embodiment 2 is a plan view around the locking pawl of another embodiment alternative to FIG. (B) is an enlarged perspective view of the vicinity of another type of locking claw in place of FIG. 3, and (b) is a view taken along the line V-V in (b). In Embodiment 3, it is sectional drawing in the location where the front fin of FIG. 2 exists, (A) is sectional drawing before fitting of both insert half-cut products, (B) is sectional drawing after fitting. The form of the insert for headrests of a prior art is shown, and the exploded perspective view is shown. It is a description perspective view of a prior art. It is a description perspective view of a prior art. It is explanatory sectional drawing of a prior art.

Explanation of symbols

1 Insert 2 One insert half product (first half product)
23 concave frame 23a outer standing wall 23a ₁ through hole
23c ₁ groove bottom
28 Front fin 3 Other insert halves (second half)
33 Convex frame 33a Convex part 34 Notch part 34d Inner edge part 35 Locking claw 35a Convex wall 35b Protrusion part
35f Upper fin 36 Thin wall 4 Stay

Claims (2)

A convex frame that is provided with a concave frame on the outer peripheral portion of one insert half-finished product and has a through hole provided on the outer vertical wall of the concave frame, and that fits into the concave frame on the outer peripheral portion of another insert half-finished product And a latching claw is provided through a notch part in which a part of the convex frame is notched, and the through hole, the latching claw, and the concave In the headrest insert in which the frame and the convex frame are fitted and integrated,
A thin-skinned thin wall includes an outer edge or a vicinity of an outer edge of a side end surface of the convex wall related to the locking claw, and an inner edge or a vicinity of the inner edge of the side end surface of the convex portion related to the convex frame facing each other through the notch. In addition, an upper fin is provided on the upper edge of the locking claw, and a front fin hanging from the outer edge of the lower end surface of the outer standing wall according to the concave frame is provided laterally horizontally on both sides from the portion of the through hole. is in the locking pawl outward protrusion while rubbing the inner surface of the outer vertical wall of the locking pawl is advanced warped back side elastic deformation, and enables the fitting to the through holes, the thin wall The headrest insert is characterized in that the notch is closed and the upper fin is in close contact with the bottom of the groove of the concave frame, and the front fin is sealed at a contact portion with the convex frame . A convex frame that is provided with a concave frame on the outer peripheral portion of one insert half-finished product and has a through hole provided on the outer vertical wall of the concave frame, and that fits into the concave frame on the outer peripheral portion of another insert half-finished product And a latching claw is provided through a notch part in which a part of the convex frame is notched, and the through hole, the latching claw, and the concave In the headrest insert in which the frame and the convex frame are fitted and integrated,
The side end surface of the convex wall related to the locking claw and the side end surface of the convex portion related to the convex frame facing each other through the notch are connected by a thin-skinned bellows-like thin wall, and the engagement An upper fin is provided at the upper edge of the pawl, and a front fin hanging from the outer edge of the lower end surface of the outer standing wall according to the concave frame is provided laterally horizontally on both sides from the portion of the through hole . engaging pawl advances warped back side elastic deformation outward protrusion while rubbing the inner surface of said outer vertical wall, and enables the fitting to the hole, with closing the notch in the thin wall, An insert for a headrest, wherein the upper fin is in close contact with a groove bottom of the concave frame, and the front fin is sealed at a contact portion with the convex frame .

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