JP2017119514A - Headrest - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a headrest which enables improvement of rigidity of a headrest frame and prevents a foaming agent from leaking when the headrest is integrally foam-molded.SOLUTION: The headrest frame is provided in the headrest, and the headrest frame includes: a front frame 32 disposed in front of the headrest frame; and a rear frame 31 disposed behind the headrest frame. A hollow holding part 34 which is formed by a separate member from the headrest frame and holds a headrest stay guide is provided at one of the front frame 32 and the rear frame 31. An integrally formed seal surface is provided at the other of the front frame 32 and the rear frame 31. An annular insertion opening for the headrest stay guide is provided on the seal surface, and an entire outer periphery of the annular insertion opening is integrally formed with the seal surface.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a headrest, and more particularly to a headrest provided with a headrest frame inside the headrest.

  Conventionally, a technique including a headrest frame inside the headrest is known (for example, Patent Document 1).

JP-A-8-155981 (FIGS. 1 and 12)

  The technique of Patent Document 1 is a technique in which a headrest frame is provided inside the headrest, but it is disclosed that foamed resin is prevented from entering the headrest frame when the pad member is integrally foam-molded. It is. In other words, there is no mention of improving the rigidity of the headrest.For example, if the headrest frame is made thick to improve rigidity, the occupant feeling of the headrest may be deteriorated, and the size of the headrest frame is not changed. Therefore, a technique for increasing the rigidity has been desired.

The objective of this invention is providing the headrest which improved the rigidity of the headrest frame in the headrest provided with the headrest frame inside.
Another object of the present invention is to provide a headrest having a structure that ensures a sealing property capable of preventing leakage of a foaming agent when integrally molding a headrest skin, a pad member, and a headrest frame.

  According to the headrest of the present invention, the subject is a headrest disposed above a seat back of a vehicle seat, wherein a headrest frame is provided inside the headrest, and the headrest frame is the headrest frame. A front frame disposed on the front side of the headrest frame, and a rear frame disposed on the rear side of the headrest frame, wherein one of the front frame and the rear frame is formed of a member separate from the headrest frame, A hollow holding portion for holding the guide is provided, and the other of the front frame and the rear frame is provided with an integrally formed seal surface, and the seal surface has an annular shape for the headrest stay guide. An insertion opening is provided, and the entire outer periphery of the annular insertion opening is formed integrally in the sealing surface. It has been, is solved by.

As described above, the seal surface formed integrally with the headrest frame is provided with the annular insertion opening for the headrest stay guide, and the entire outer periphery thereof is formed integrally with the seal surface. When the headrest skin is sandwiched between the headrest frame and the headrest frame, the headrest skin can be sandwiched closely. Therefore, when foaming the headrest skin, the pad member, and the headrest frame as one body, it can be performed without using a special member or an additional member, and a sealing property for preventing the foaming agent from leaking outside the headrest skin. This can be further improved.
In addition, the entire outer periphery of the annular insertion opening for the headrest stay guide is integrally formed, and the headrest frame (the other of the front frame and the rear frame) is integrally formed, improving the rigidity of the headrest frame. Can be made.

At this time, it is preferable that the headrest frame has an inverted U shape with a free end in which the annular insertion opening is formed facing downward.
Thus, if the headrest frame is configured in an inverted U shape, it is possible to improve the rigidity of the headrest frame, and the foaming agent wraps around when the headrest skin, the pad member, and the headrest frame are integrally molded. Easy to improve productivity.

Further, it is preferable that a part of the one of the front frame and the rear frame is inserted into the other of the front frame and the rear frame.
Further, the holding portion has an extending portion extending from the headrest frame, a recess is provided above the annular insertion opening, and the extending portion is inserted into the recess, More preferred.

The headrest frame may have an inverted U shape, and the recess may be disposed on the inverted U-shaped linear portion of the headrest frame.
Furthermore, the concave portion may be provided with a wall for inserting and guiding the holding portion.

According to the headrest of the present invention, the rigidity of the headrest frame can be improved in the headrest provided with the headrest frame inside.
According to the headrest of the present invention, when the headrest skin, the pad member, and the headrest frame are integrally formed by foaming, it can be performed without using a special member or an additional member, and the foaming agent leaks outside the headrest skin. It is possible to further improve the sealing performance for preventing the above.
Furthermore, according to the headrest of the present invention, it is possible to improve the rigidity of the headrest frame, and when the headrest skin, the pad member, and the headrest frame are integrally formed by foaming, the foaming agent can easily go around, and productivity can be improved. It is possible to improve.

It is a perspective view of the vehicle seat using the headrest concerning the present invention. It is a schematic front view explaining the headrest which concerns on this invention. It is a schematic side view explaining the headrest which concerns on this invention. It is the schematic perspective view which decomposed | disassembled the headrest frame. It is a schematic perspective view of a headrest frame. It is explanatory drawing seen from one inner side of a headrest frame. It is explanatory drawing seen from the other inner side of the headrest frame. It is a schematic exploded perspective view explaining the assembly | attachment of a headrest. It is explanatory drawing which looked at from the bottom face of a headrest. It is principal part explanatory drawing explaining the headrest stay and mechanism which support a headrest. It is a perspective view which shows the mechanism which supports a headrest.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The members, arrangements, and the like described below do not limit the present invention, and various modifications can be made in accordance with the spirit of the present invention.

  1 to 11 show a headrest according to the present invention. FIG. 1 is a perspective view of a vehicle seat using the headrest, FIG. 2 is a schematic front view for explaining the headrest, and FIG. 3 is a schematic for explaining the headrest. 4 is an exploded perspective view of the headrest frame, FIG. 5 is a schematic perspective view of the headrest frame, FIG. 6 is an explanatory view seen from one inside of the headrest frame, and FIG. 7 is seen from the other inside of the headrest frame. FIG. 8 is a schematic exploded perspective view for explaining the assembly of the headrest, FIG. 9 is an explanatory view from the bottom of the headrest, FIG. 10 is an explanatory view of the main part for explaining the headrest stay and the mechanism for supporting the headrest, and FIG. It is a perspective view which shows the mechanism which supports a headrest.

  First, the configuration of the vehicle seat S1 to which the headrest HR is attached will be described. In the present embodiment, the vehicle seat S11 is divided into a right side (driver seat side) vehicle seat S11 and a left side (passenger seat side) vehicle seat S12. Each of the vehicle seats S11 and S12 includes a seat cushion 10, a seat back 20, and a headrest HR. Although the vehicle seat S11 on the right side and the vehicle seat S12 on the left side are different, the vehicle seats S11 and S12 are common to the headrest HR. Therefore, in the following description, only the headrest HR of the right vehicle seat S11 will be described as an example.

  The headrest HR according to the present embodiment is provided above the seat back 20, and as shown in FIGS. 2 to 8, an inverted U-shaped headrest frame with a free end in which an opening described later is formed facing downward. A pad member 38 is filled between 30 (the rear frame 31 and the front frame 32) and the headrest skin 35. Thus, if the headrest frame 30 (rear frame 31 and front frame 32) is formed in an inverted U shape, the rigidity of the headrest frame 30 can be improved, and the headrest skin 35, the pad member 38, and the headrest frame can be improved. When the foam is integrally foam-molded, the foaming agent is easy to wrap around and the productivity is improved.

  The headrest skin 35 is formed in a bag shape, and an opening 35a, which is a foaming inlet for injecting a liquid foamed resin, and two holes 35b, 35b for inserting a headrest stay 37, which will be described later, are formed on the bottom surface thereof. Is formed. The material of the headrest skin 35 is made of woven fabric, non-woven fabric, synthetic resin, or other known materials. As described above, the headrest skin 35 is disposed such that the end portion of the headrest stay guide 33 is positioned outside the headrest skin 35.

  In addition, the headrest HR is disposed in the headrest skin 35 by disposing the headrest frame 30 (the rear frame 31 and the front frame 32) from the opening 35a provided in the headrest skin 35, arranged in a mold (not shown), and from the opening 35a. The headrest HR is integrally molded by filling with a foaming agent, and the headrest skin 35, the headrest frame 30 (rear frame 31, front frame 32), and a pad member 38 made of urethane or the like are integrally molded.

  The headrest frame 30 (rear frame 31, front frame 32) of this embodiment is composed of two members (rear frame 31, front frame 32) as shown in FIGS. As will be described later, the members (the rear frame 31 and the front frame 32) are configured so as to be joined and joined by using a vertical wall which is a mating surface (see FIG. 5).

  That is, of the two members (the rear frame 31 and the front frame 32) constituting the headrest frame 30, the rear side of the headrest HR is made of metal, and the front side of the headrest HR is made of synthetic resin. The rear frame 31 and the front frame 32, which are two members, are formed in a hollow middle shape. For this reason, rigidity and weight reduction can be achieved. And the part which comprises the leg parts 31b and 32b in the both sides of the inverted U-shaped headrest frame 30 becomes hollow shape, The space which accommodates the hollow rod-shaped headrest stay guide 33 is formed in this inside. Yes. The headrest stay guide 33 is held and accommodated by a holding portion 34, which will be described later, and is inserted from the free end side of the headrest frame 30 so as to be able to advance and retreat.

  The rear frame 31 is made of a known metal, and as shown in FIGS. 4 and 6, is formed from an upper support surface portion 31a and leg portions 31b and 31b extending from the support surface portion 31a on both sides. It has an inverted U shape with the end facing downward, and a vertical wall 31c as a mating surface is formed on the outer periphery except for the free end. In FIG. 6, screw holes 31d are formed on both sides of the support surface portion 31a on the support surface portion 31a side from the base end of the leg portion 31b to be connected to the front frame 32 described below. The screw hole 31d has a raised portion 31e whose periphery swells inward.

  In other words, when viewed from the outer surface, the screw hole 31d of the rear frame 31 is a recess 31f as shown in FIG. As described above, the screw hole 31d formed in the rear frame 31 of the headrest frame 30 has the concave portion 31f on the surface to which the bonding member 36 such as a screw is attached, so that the bonding member 36 such as a screw is connected to the pad member 38 side. The pad member 38 can be prevented from being damaged by the bonding member 36 such as a screw.

  The headrest frame 30 is provided with a headrest stay guide 33 when the headrest stay 37 is inserted. The headrest stay guide 33 is held by a holding portion 34 provided in the headrest frame 30. It is configured. As shown in FIGS. 4 and 6, the holding portion 34 is shaped like a cylinder having a square cross section by bending a metal plate, and includes a rear frame 31 (consisting of metal) of the headrest frame 30. ) Is fixed by a fixing portion 34a such as welding. For this reason, the rigidity of the headrest frame 30 itself can be improved by joining the holding part 34 to the rear frame 31 by the fixing part 34a such as welding. Further, the welding surface of the holding portion 34 of the headrest stay guide 33 is bent and formed in a square shape, and is formed flat, so that welding is easy and the rear frame 31 and the holding portion 34 are firmly welded. Thus, the rigidity can be improved.

  On the other hand, the front frame 32 of the headrest frame 30 is made of a synthetic resin such as polypropylene, and is formed by an upper support surface portion 32a and leg portions 32b and 32b extending from the support surface portion 32a on both sides. It has an inverted U shape with the end facing downward, and a vertical wall 32c as a fitting surface is formed on the outer periphery excluding the free end. As shown in FIG. 7, the abutting surface 32n, which is a mating surface on the outer peripheral side of the front frame 32 forming a U-shape, has an outer peripheral planar shape so as to abut on the vertical wall 31c of the rear frame 31 described above. Is formed. The inner peripheral side vertical wall 32c forming the leg portion 32b is composed of a vertical wall 32c1 on the support surface portion 32a side and a vertical wall 32c2 formed at a distance from the vertical wall 32c1, The vertical wall 31c inside the leg portion 31b of the rear frame 31 is fitted between the vertical wall 32c1 and the vertical wall 32c2.

  The support surface portion 32 a of the front frame 32 is formed with a joint rib portion 32 d that is a joint portion for joining the rear frame 31 at a position aligned with the screw hole 31 d of the rear frame 31. This joining rib portion 32d is for inserting and assembling a joining member 36 such as a screw from the screw hole 31d of the rear frame 31, and in this embodiment, a guide hole 32e is formed.

  In the present embodiment, as shown in FIG. 7, a seal surface 32 h integrally formed with the front frame 32 is formed at the end (lower end) of the leg portion 32 b of the front frame 32. An opening 32i for insertion of the headrest stay guide 33 is formed in the seal surface 32h, and the periphery of the surface forming the opening 32i is formed in an annular shape. Accordingly, the headrest skin 35 can be sandwiched and sealed with the headrest stay guide 33 around the opening 32i so as to be surely sealed. Further, since the entire circumference is integrally formed, the rigidity of the front frame 32 can be improved.

  Further, the vertical wall 32c and the contact surface 32n, which are mating surfaces of the headrest frame 30, and the opening 32i for insertion of the headrest stay guide 33 are configured to intersect each other. And the opening 32i forms the step part 32j. That is, the sealing surface 32h is formed at the free end portion of the front frame 32 and the opening 32i is formed at the same time, but these are provided at the step portion 32j. Thus, by providing the stepped portion 32j, the rigidity as the headrest frame 30 can be improved.

  In this embodiment, on the free end side of the leg portion 32b of the front frame 32, a protruding wall 32k facing the inside of the leg portion is formed on the upper portion of the seal surface 32h as shown in FIGS. The induction part is used. Even if the positioning is not performed precisely at the time of fitting, it is possible to assist when fitting at an approximate appropriate position.

  Further, as shown in FIG. 4, ribs 32 m are provided on the inner upper surface of the step portion 32 j of the front frame 32 in a direction orthogonal to the fitting surface with the rear frame 31. As described above, when the rib 32m is provided, the rib 32m can be crushed by the fitting portion of the rear frame 31 when the rear frame 31 and the front frame 32 are fitted, and the error can only be absorbed. Without rattling.

  In the present embodiment, two joining rib portions 32d are provided in accordance with the rear frame 31, and the two joining rib portions 32d are connected by connecting ribs 32f as shown in FIGS. ing. In this way, the front frame 32 and the rear frame 31 are fitted by the vertical walls 31c and 32c, respectively, but a plurality of joining rib portions 32d are provided on the front frame 32 made of resin, and the joining rib portions 32d are connected by the connecting rib 32f. Since they are connected, a portion having a high rigidity, i.e., the attachment position of the joining rib portion 32d, can be connected by the connecting rib 32f, and the rigidity of the headrest frame 30 itself can be improved. In the present embodiment, the number of the joining rib portions 32d is two.

  In the present embodiment, at least one orthogonal rib 32g is formed on the support surface portion 32a so as to be orthogonal to the connecting rib 32f described above. In the present embodiment, four orthogonal ribs 32g are provided, but one or more are sufficient, and the present invention is not limited to this. By comprising in this way, the rigidity of the headrest frame 30 can be improved more.

  The assembly by fitting the rear frame 31 and the front frame 32 constituting the headrest frame 30 is performed by providing a joining rib portion 32d made of a boss on the inner side of the front frame 32 and projecting the inner side, thereby joining the headrest frame 30. 36 is attached from the rear frame 31 (ie, joined from the rear frame 31 toward the front frame 32). By comprising in this way, it becomes possible to suppress the feeling deterioration by having protrusions, such as the joining member 36, on a passenger | crew head side.

  As shown in FIG. 8, the headrest stay guide 33 includes a hollow sliding body 33 a held by the holding part 34 and a lower end flange part 33 b formed on the end side. The sliding body 33a of the present embodiment is formed in a cross-section that is slightly smaller than the holding portion so as to match the shape of the holding portion. Thus, the shape of the sliding body 33a is preferably matched to the shape of the holding portion 34.

  By attaching the holding portion 34 of the headrest stay guide 33 to the rear frame 31, the rigidity can be improved, and at the same time, the front side is constituted by the front frame 32 made of resin, so that the occupant's feeling Can be suppressed.

  To form the headrest HR by integral foaming, the headrest frame 30 is formed as described above, and a bag-like shape is formed from the portions constituting the leg portions 31b and 32b on both sides of the inverted U-shaped headrest frame 30 from the opening 35a. Place on the headrest frame. The headrest skin 35 is sandwiched between the lower end flange portion 33b of the headrest stay guide 33 and the seal surface 32h of the headrest frame 30 inside the headrest HR. In this way, it is possible to prevent the foaming agent from leaking from the headrest skin 35 when the headrest skin 35, the pad member 38, and the headrest frame 30 are integrally foamed without using any special members or additional parts. Particularly, since the headrest skin 35 can be tightly sandwiched between the sealing surface 32h and the lower end flange portion 33b, it is possible to further improve the sealing performance for preventing the foaming agent from leaking outside the headrest skin. Become.

  In the headrest HR configured as described above, the headrest stay guide 33 is located in the most retracted position in the portion formed by the leg portions 31b and 32b of the headrest frame 30 (that is, stored in the headrest HR). In this state, the portion around the holes 35b and 35b in the headrest skin 35 of the headrest HR is sandwiched between the sealing surface 32h of the headrest frame 30 and the lower end flange portion 33b of the headrest stay guide 33.

  In the present embodiment, the headrest HR is supported by the headrest stay 37 in a state in which a pair of headrest stays 37 (see FIGS. 10 and 11) made of metal bars are inserted into the headrest stay guide 33, and The headrest stay 37 is rotatably supported by a casing 51 of a headrest rotation mechanism 50 described later. The headrest HR can be rotated by the headrest rotation mechanism 50 until the headrest HR is tilted forward by about 90 degrees from the state of standing up above the seat back 20.

Next, the headrest rotation mechanism 50 will be described.
As shown in FIG. 11, the headrest rotating mechanism 50 includes a casing 51, an urging spring 52, a lock member 53, and a slide member 54.
The headrest rotation mechanism 50 is a mechanism that tilts the headrest HR forward by rotating the headrest stay 37 forward. The headrest rotating mechanism 50 is provided on the upper front side of the seat back frame 40 while being covered with a resin cover (not shown).

  The casing 51 forms a casing of the headrest rotating mechanism 50, and is configured by overlapping a substantially rectangular metal plate in the present embodiment, and a lock member 53 and a slide member 54 are accommodated therein. . The casing 51 is formed with a plurality of attachment portions 55 formed with holes 55a extending outward, and the attachment portions 55 and the seat back frame 40 are fixed by screws BS. Moreover, the casing 51 supports the headrest stay 37 so that the headrest stay 37 can rotate. The biasing spring 52 is an example of a biasing member that biases the headrest stay 37 forward, and is provided on the back surface (rear surface) side of the casing 51.

  The lock member 53 is a metal piece member that engages with the headrest stay 37 in order to maintain the headrest stay 37 in an upright state against the urging force of the urging spring 52. Here, the standing state means an arrangement state of the headrest stay 37 when the headrest HR stands up and is positioned above the seat back 20.

  The configuration of the lock member 53 will be described in more detail. As shown in FIG. 11, the headrest stay 37 includes a vertical portion 37a that extends along the height direction of the vehicle seat S1 (in other words, the vertical direction of the seat back 20). A horizontal portion 37b adjacent to the lower portion of the vertical portion 37a and extending in the left-right direction (in other words, the width direction of the seat back 20), and a substantially fan-shaped engagement portion 37c at the end of the horizontal portion 37b. . Then, the lock member 53 is engaged with the headrest stay 37 by being fitted into a notch 37d formed in the engaging portion 37c, thereby maintaining the headrest stay 37 in an upright state.

  Further, the lock member 53 is swingably supported in the casing 51, and a position (engagement) where a part of the lock member 53 can be exposed to the outside of the casing 51 and fitted into the notch 37d of the engaging portion 37c. Position) and a position where the exposed portion is accommodated in the casing 51 and removed from the notch 37d (release position).

  The slide member 54 is a long body housed in the casing 51, and slides along the width direction of the seat back 20 in order to swing the lock member 53. The slide member 54 is normally in a position that brings the lock member 53 to the engaged position. Then, when the slide member 54 slides to one end side in the longitudinal direction, the lock member 53 is brought to the release position.

In the headrest rotating mechanism 50 configured as described above, the lock member 53 is against the biasing force of the biasing spring 52 while the lock member 53 is engaged with the engagement portion 37c of the headrest stay 37 at the engagement position. The headrest stay 37 is maintained in an upright state, whereby the headrest HR is held at the seating position.
On the other hand, when the lock member 53 swings from the engagement position to the release position by the sliding movement of the slide member 54, when the engagement between the lock member 53 and the engagement portion 37c is released, the biasing force of the biasing spring 52 causes The headrest stay 37 rotates forward, and accordingly, the headrest HR falls forward.

S1 Vehicle seat S11 Vehicle seat S12 Vehicle seat 10 Seat cushion 20 Seat back HR Headrest 30 Headrest frame 31 Rear frame 31a Support surface portion 31b Leg portion 31c Vertical wall 31d Screw hole 31e Swelling portion 31f Recess 32 Front frame 32a Support surface portion 32b Leg 32c Vertical wall 32c1 Vertical wall 32c2 Vertical wall 32d Joining rib 32e Guide hole 32f Connecting rib 32g Orthogonal rib 32h Sealing surface 32i Opening 32j Step 32k Projecting wall 32m Rib 32n Contact surface 33 Headrest stay guide 33a Slider 33b Lower end Flange portion 34 Holding portion 34a Adhering portion 35 Headrest skin 35a Opening 35b Hole 36 Joining member 37 Headrest stay 37a Vertical portion 37b Horizontal portion 37c Engaging portion 37d Notch 38 Pad member 40 Back frame 50 headrest rotation mechanism 51 with the casing 52 bias spring 53 locking member 54 the slide member 55 mounting portion 55a hole BS bis

Claims (6)

A headrest disposed above a seat back of a vehicle seat,
A headrest frame is provided inside the headrest,
The headrest frame is
A front frame disposed on the front side of the headrest frame;
A rear frame disposed on the rear side of the headrest frame;
With
One of the front frame and the rear frame is formed of a separate member from the headrest frame, and is provided with a hollow holding portion that holds the headrest stay guide,
The other of the front frame and the rear frame is provided with an integrally formed sealing surface,
The sealing surface is provided with an annular insertion opening for the headrest stay guide,
A headrest characterized in that the entire outer periphery of the annular insertion opening is integrally formed in the sealing surface.   2. The headrest according to claim 1, wherein the headrest frame has an inverted U shape with a free end in which the annular insertion opening is formed facing downward.   The headrest according to claim 1 or 2, wherein a part of the one of the front frame and the rear frame is inserted into the other of the front frame and the rear frame. The holding part has an extending part extending from the headrest frame,
A recess is provided above the annular insertion opening,
The headrest according to any one of claims 1 to 3, wherein the extension portion is inserted into the recess. The headrest frame has an inverted U shape,
The headrest according to claim 4, wherein the concave portion is disposed in the inverted U-shaped linear portion of the headrest frame.   The headrest according to claim 4, wherein the concave portion is provided with a wall for insertion guide of the holding portion.

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