JP7240294B2 - headrest - Google Patents

Description

The present invention relates to headrests for vehicles.

Patent Document 1 discloses an inner cover having a stay insertion portion, a bag-shaped skin, a pad integrally foam-molded with the skin by a foaming liquid injected between the inner cover and the bag-shaped skin, A headrest having an outer cover that fits into the stay insertion portion and sandwiches the end of the outer skin is described.

Japanese Patent No. 3889157

Patent Literature 1 describes a method of forming a pad by injecting a foaming liquid between an outer cover and an inner cover while the outer cover is attached. In addition to this method, a method of injecting the bubbling liquid between the skin and the inner cover in a state where the outer cover is not attached is conceivable. In this method, it is important to prevent relative displacement between the skin and the inner cover. Patent Literature 1 does not envision forming the pad in this manner.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. To provide a headrest capable of stabilizing a

A headrest according to the present invention includes an inner cover having a pair of stay insertion portions, a bag-like outer skin, and a foam pad formed between the inner cover and the outer skin, At the end of the outer skin, a pair of first locking portions aligned in a first direction and locked to the bottom portion of the inner cover and a second direction intersecting the first direction locked to the bottom portion are provided. A pair of second locking portions arranged side by side are provided.

ADVANTAGE OF THE INVENTION According to the present invention, there is provided a headrest that can stabilize the shape of the pad by suppressing the relative displacement between the outer cover and the inner cover even when the foaming liquid is injected before the outer cover is attached. can do.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external appearance schematic diagram which shows schematic structure of the headrest for describing one Embodiment of this invention. Fig. 2 is an exploded perspective view of the headrest 100 shown in Fig. 1 with an outer cover 40 removed, viewed from the front side; Fig. 2 is an exploded perspective view of a portion of the headrest 100 shown in Fig. 1 excluding an outer cover 40 and a pad 30 as viewed from the front side; Fig. 4 is a perspective view of the inner cover 10 shown in Fig. 3 as seen from the back side; FIG. 3 is a schematic diagram of a cross section taken along the line AA shown in FIG. 2 as seen from the rear;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an external schematic diagram showing a schematic configuration of a headrest for describing one embodiment of the present invention. A headrest 100 shown in FIG. 1 is used by being attached to a seat portion of a vehicle having a seat such as an automobile.

The headrest 100 includes stays 11, an inner cover 10 that supports the stays 11, a bag-shaped skin 20, a pad 30 made of foam such as urethane formed between the inner cover 10 and the skin 20, and an inner cover. an outer cover 40 that is supported by the cover 10 and clamps the edge of the outer skin 20 between itself and the inner cover 10;

The pad 30 is foam-molded integrally with the outer skin 20 by injecting a foaming liquid between the inner cover 10 and the outer skin 20 and causing the foam to be foamed by a chemical reaction.

Hereinafter, the front direction of a person who sits on a seat with the headrest 100 in a normal posture is referred to as the front direction, and the rear direction of the person is referred to as the rear direction. Also, directions perpendicular to the front-rear direction (the right and left directions with respect to the person when the person is viewed from the front) are described as left-right directions. Also, the direction perpendicular to the front-rear direction and the left-right direction and directed from the headrest 100 toward the seat surface side is referred to as the downward direction, and the opposite direction to the downward direction is referred to as the upward direction. Also, the front surface of the headrest 100 is referred to as the front surface, and the rear surface of the headrest 100 is referred to as the rear surface.

FIG. 2 is an exploded perspective view of the headrest 100 shown in FIG. 1 with the outer cover 40 removed, viewed from the front side. FIG. 3 is an exploded perspective view of a portion of the headrest 100 shown in FIG. 1 excluding the outer cover 40 and the pad 30 as viewed from the front side. FIG. 4 is a perspective view of the inner cover 10 shown in FIG. 3 as seen from the rear side.

As shown in FIG. 3, the inner cover 10 supports the stay 11 inside. The bottom (lower end) of the inner cover 10 is formed with a concave portion 16 that is recessed upward. The concave portion 16 has a substantially rectangular shape when viewed in the vertical direction. A pair of stay insertion portions 12R and 12L arranged in the left-right direction through which the stay 11 is inserted is provided on the bottom surface of the concave portion 16. As shown in FIG. Between the stay insertion portion 12R and the stay insertion portion 12L on the bottom surface of the concave portion 16 of the inner cover 10, an insertion hole 13 for an injection nozzle for foaming liquid used for molding the pad 30 is formed. The insertion hole 13 penetrates the inner cover 10 as shown in FIG.

Between the stay insertion portion 12R and the stay insertion portion 12L on the bottom surface of the recessed portion 16 of the inner cover 10, a fitting claw provided on a plate (not shown) fixed to the inner surface of the projecting portion 22B of the outer cover 20 is fitted. A region 14 having a fitting hole (symbol omitted) that fits with a fitting hole (symbol omitted) that fits a fitting claw provided on a plate (not shown) fixed to the inner surface of a projecting portion 22F of the outer skin 20 described later (symbol are omitted) are formed. It should be noted that even if a fitting hole is provided in the plate fixed to the inner surface of the protruding portion 22B of the outer skin 20, and a fitting claw that fits into the fitting hole is formed in the region 14. good. Similarly, the plate fixed to the inner surface of the projecting portion 22F of the outer skin 20 is provided with a fitting hole, and the area 15 is formed with a fitting claw that fits into the fitting hole. good too.

As shown in FIGS. 2 and 3, a protrusion 12r extending toward the recess 16 is formed substantially in the center of the right end of the stay insertion portion 12R of the inner cover 10. As shown in FIGS. A projecting portion 12l extending toward the recess 16 is formed substantially in the center of the left end portion of the stay insertion portion 12L of the inner cover 10 . The direction connecting the protrusions 12r and 12l coincides with the horizontal direction.

As shown in FIG. 2 , the skin 20 is folded back inside the recess 16 at the bottom of the inner cover 10 to cover the inner surface of the recess 16 and part of the bottom surface of the recess 16 . The portion of the skin 20 that is inside the recess 16 constitutes the edge of the skin 20 . An annular portion covering the vicinity of the boundary between the bottom surface and the inner side surface of the recess 16 in the end portion of the skin 20 is referred to as an annular portion 21 .

As shown in FIG. 3, the outer skin 20 has four convex projections (projection 22F, projection 22B, projection 24R, and projection 24L) protruding from the annular portion 21 .

The projecting portion 22</b>F projects from the rear portion of the annular portion 21 . The protruding portion 22B protrudes from the front portion of the annular portion 21 . The protruding portion 24R protrudes from the right portion of the annular portion 21 . The protruding portion 24L protrudes from the left portion of the annular portion 21 .

A hole portion 23 is formed in the projecting portion 22B at a position corresponding to the insertion hole 13 of the inner cover 10 . Further, the above-described plate is fixed to the inner surface of the projecting portion 22B, and this plate is formed with a fitting claw (not shown) that fits into the fitting hole of the region 14 of the inner cover 10. . The aforementioned plate is similarly fixed to the inner surface of the projecting portion 22F, and this plate is formed with a fitting claw (not shown) that fits into the fitting hole of the region 15 of the inner cover 10. .

In the example of FIG. 3, rectangular hole portions HR and HL are formed in the projecting portion 24R and the projecting portion 24L, respectively.

As shown in FIG. 2, the projecting portion 22B of the outer cover 20 is formed by fitting the fitting claw of the plate fixed to the inner surface thereof into the fitting hole of the region 14 of the inner cover 10 shown in FIG. , are engaged with the bottom of the inner cover 10 . The hole portion 23 of the projecting portion 22B shown in FIG. 2 overlaps with the insertion hole 13 of the inner cover 10 shown in FIG. An injection nozzle can be inserted into the insertion hole 13 through the hole 23 .

The projecting portion 22F of the outer cover 20 is attached to the bottom portion of the inner cover 10 by fitting the fitting claw of the plate fixed to the inner surface thereof into the fitting hole of the region 15 of the inner cover 10 shown in FIG. Locked.

In this manner, the projecting portion 22B and the projecting portion 22F engaged with the inner cover 10 at the end portion of the outer skin 20 are arranged side by side in the front-rear direction.

As shown in FIG. 2, the projecting portion 24R of the outer skin 20 is folded back into the stay insertion portion 12R. The projection 12r of the inner cover 10 is passed through the hole HR of the projection 24R, so that the projection 24R is locked to the bottom of the inner cover 10. As shown in FIG.

The projecting portion 24L of the outer skin 20 is folded back into the stay insertion portion 12L. The projection 12l of the inner cover 10 is passed through the hole HL of the projection 24L, whereby the projection 24L is locked to the bottom of the inner cover 10. As shown in FIG.

In this manner, the projecting portion 24R and the projecting portion 24L engaged with the inner cover 10 at the end portion of the outer skin 20 are arranged side by side in the left-right direction.

As shown in FIG. 2, the outer cover 40 has a pair of cylindrical portions 41R and 41L for passing the stay 11 therethrough. The tubular portion 41R is inserted into the stay insertion portion 12R of the inner cover 10, and the tubular portion 41L is inserted into the stay insertion portion 12L of the inner cover 10. As shown in FIG. When the outer cover 40 is attached, at least part of the edge of the outer skin 20 , more specifically, part of the part covering the inner surface of the recess 16 is sandwiched between the inner cover 10 and the outer cover 40 .

FIG. 5 is a schematic view of the cross section taken along the line AA shown in FIG. 2 viewed backward (seen from the front side to the rear side). AA line is a straight line passing through the protrusions 12r and 12l of the inner cover 10. As shown in FIG.

As shown in FIG. 5, on the upper surface of the outer cover 40, a fitting claw 42L extending upward is formed to the left of the cylindrical portion 41L. A fitting claw 42R extending upward is formed on the upper surface of the outer cover 40 to the right of the cylindrical portion 41R.

The fitting claw 42</b>R fits with the upper end portion of the protrusion 12 r of the inner cover 10 inside the inner cover 10 relative to the recess 16 . The fitting claw 42L is fitted with the upper end portion of the protrusion 12l of the inner cover 10 inside the inner cover 10 relative to the recess 16 . The outer cover 40 is supported by the inner cover 10 by these fittings. The outer cover 40 and the inner cover 10 sandwich the edge of the skin 20 .

The headrest 100 having the above configuration is manufactured as follows.
First, the inner cover 10 shown in FIG. 3 is covered with the skin 20 shown in FIG. Next, the fitting claw of the plate fixed to the projecting portion 22B at the end of the outer cover 20 is fitted into the fitting hole of the region 14 of the inner cover 10, and fixed to the projecting portion 22F at the end of the outer cover 20. The fitting claws of the plate are fitted into the fitting holes in the region 15 of the inner cover 10 to lock the protrusions 22B and 22F to the inner cover 10 .

Further, the projecting portion 24R at the end of the outer skin 20 is bent into the stay insertion portion 12R, and the projecting portion 12r of the inner cover 10 is passed through the hole HR to lock the projecting portion 24R to the projecting portion 12r. Also, the projecting portion 24L at the end of the outer skin 20 is bent into the stay insertion portion 12L, the projecting portion 12l of the inner cover 10 is passed through the hole HL, and the projecting portion 24L is locked to the projecting portion 12l. By the steps up to this point, the appearance shown in the upper part of FIG. 2 is obtained.

In this state, the injection nozzle is inserted into the insertion hole 13 of the inner cover 10 through the hole 23 of the projecting portion 22B, and the tip of the injection nozzle is placed in the space between the inner cover 10 and the outer skin 20. Then, after the foaming liquid is delivered from the injection nozzle, the pad 30 is foam-molded by foaming the foaming liquid. After forming the pad 30, the injection nozzle is pulled out and the outer cover 40 is attached to the inner cover 10 to complete the headrest 100. - 特許庁

As described above, according to the headrest 100, the pad 30 is held in a state in which the ends of the outer skin 20 are locked by the four projections, ie, the projections 22B, 22F, 24R, and 24L. foam molding is performed. Foam molding is performed in a state in which the ends of the outer skin 20 are locked at two points aligned in the front-rear direction and two points aligned in the left-right direction. Relative positional deviation with the cover 10 can be effectively suppressed. As a result, the pad 30 can be stably molded, and a high-quality headrest 100 can be manufactured.

Further, according to the headrest 100, the projections 12r and 12l provided on the inner cover 10 and the holes provided on the projections 24R and 24L engage the protrusions 24R and 24L with the inner cover 10. It can be done by HR and HL. Since the protrusions 12r and 12l can be formed simply by improving the mold for the inner cover 10, there is no need to provide additional parts to existing products. Therefore, the manufacturing cost can be suppressed.

In addition, the protrusions 12r and 12l of the inner cover 10 provided for engaging the outer cover 20 and the inner cover 10 also function as fitting claws for supporting the outer cover 40. As shown in FIG. Therefore, another configuration for fixing the outer cover 40 to the inner cover 10 can be eliminated or simplified, and the manufacturing cost can be suppressed.

Further, when the outer cover 40 is supported by the inner cover 10, as shown in FIG. Rightward movement of the portion 24L is restricted. Therefore, it is possible to prevent the slippage of the skin 20 and the falling off of the edge of the skin 20 .

In the example of FIG. 2, the four protrusions provided at the end of the outer skin 20 are a combination of two protrusions aligned in the front-rear direction and two protrusions aligned in the left-right direction. In order to effectively prevent the outer cover 20 and the inner cover 10 from slipping during the molding of the pad 30, such a combination is most preferable. If the direction in which the two projections are arranged intersects, it is possible to prevent the outer cover 20 from slipping from the inner cover 10 when the pad 30 is molded.

This specification describes at least the following matters. In addition, although the parenthesis shows the components corresponding to the above-described embodiment, the present invention is not limited to this.

(1) An inner cover (inner cover 10) having a pair of stay insertion portions (stay insertion portions 12R, 12L), a bag-like outer skin (outer skin 20), and an inner cover formed between the inner cover and the outer skin A headrest (headrest 100) having a pad (pad 30) made of foam,
A pair of first locking portions (protrusions 22B, 22F) aligned in a first direction (front-rear direction) locked to the bottom portion of the inner cover and a pair of first locking portions (protrusions 22B, 22F) locked to the bottom portion are provided at the ends of the outer skin. A headrest provided with a pair of second locking portions (projections 24R, 24L) arranged in a second direction (horizontal direction) intersecting the first direction.

(2) The headrest according to (1),
The inner cover has a pair of protrusions (protrusions 12r and 12l) arranged in the second direction and formed in each of the pair of stay insertion portions in the bottom portion,
The second locking portion has holes (holes HR and HL),
A headrest in which the second locking portion is locked to the bottom portion in a state in which the hole portion is passed through the projection portion.

(3) The headrest according to (2),
An outer cover (outer cover 40) that is supported by the inner cover and sandwiches the edge of the outer skin between itself and the inner cover,
The outer cover has fitted portions (fitting claws 42R and 42L) that are fitted to the pair of protrusions.

(4) The headrest according to any one of (1) to (3),
the first direction is the front-rear direction of the headrest;
The second direction is the left-right direction of the headrest.

100 Headrest 10 Inner cover 11 Stays 12L, 12R Stay insertion parts 12l, 12r Projection part 13 Insertion holes 14, 15 Area 16 Recess 20 Outer skin 21 Annular parts 22B, 22F, 24L, 24R Projection part 23 Hole part 30 Pad 40 Outer cover 41L , 41R cylindrical portions 42L, 42R fitting claws

Claims (4)

A headrest having an inner cover having a pair of stay insertion portions, a bag-shaped skin, and a foam pad formed between the inner cover and the skin,
At the end of the outer skin, a pair of first locking portions aligned in a first direction and locked to the bottom portion of the inner cover and a second direction intersecting the first direction locked to the bottom portion are provided. A pair of second locking portions arranged side by side is provided ,
The inner cover has a pair of protrusions formed inside each of the pair of stay insertion portions and arranged in the second direction,
The second locking portion is a headrest that is locked to each of the pair of protrusions in a state of being bent into the stay insertion portion . A headrest according to claim 1,
The first locking portion is a headrest that is locked between the pair of stay insertion portions on the bottom portion . The headrest according to claim 1 or 2 ,
an outer cover that is supported by the inner cover and sandwiches an edge of the outer skin between itself and the inner cover;
The outer cover has a fitted portion that is fitted to each of the pair of protrusions. The headrest according to any one of claims 1 to 3,
the first direction is the front-rear direction of the headrest;
The second direction is the left-right direction of the headrest.

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