JP2014218155A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reinforce supports, in which headrest stays are inserted, with a back frame and thereby form the supports having necessary strength without using special reinforced supports in a vehicle seat including a detachable headrest at an upper part of a seat back.SOLUTION: In a vehicle seat, supports 30 supporting a headrest 40 are supported on a back frame 50 serving as a framework of a seat back and headrest stays 41, 42 are inserted into insertion holes of the supports 30 to attach the headrest 40 to the seat back. Spaces for inserting the supports 30 are formed in the back frame 50. Then, resin injection molding is performed with the back frame 50 held in a mold, and the supports 30 are formed in the spaces by integral molding.

Description

  The present invention relates to a vehicle seat including a detachable headrest that can be attached to and detached from an upper portion of a seat back.

2. Description of the Related Art Vehicle seats such as automobiles are often used in which a detachable headrest is attached to the upper part of a seat back. In this case, the structure of the headrest mounting part is that a metal holder is welded and fixed to the back frame of the seat back, a resin support is inserted and held in this holder, and a headrest stay is inserted into the support. Become. However, in this case, the structure is complicated, and improvement in productivity is an issue.
Japanese Patent Application Laid-Open Publication No. 2004-228620 discloses a device in which the holder is removed and the support is directly held on the back frame.

JP 2003-11715 A

However, in the case of the technique disclosed in Patent Document 1, since there is no holder, it is necessary to increase the strength of the support, and a special support that is reinforced must be used. Therefore, there is a problem that the productivity of the support is deteriorated.
In view of such a problem, an object of the present invention is to provide a special support that is reinforced by reinforcing a support into which a headrest stay is inserted by a back frame in a vehicle seat including a detachable headrest on an upper portion of a seat back. It is to construct a support having a necessary strength without using the.

A first aspect of the present invention is a vehicle seat in which a support for supporting a headrest is supported on a back frame, which is a skeleton of a seat back, and a headrest stay is inserted into an insertion hole of the support and the headrest is attached to the seat back. Forming a space for inserting the support in the back frame, holding the back frame in a mold and performing resin injection molding, and forming the support in the space by integral molding. Features.
According to the first invention, since the support is integrally formed in the space formed in the back frame, the support is reinforced around the back frame, and the necessary strength can be obtained without using a specially reinforced support. Support can be configured. In addition, since the support is formed by so-called insert molding in which the back frame is held in the mold and injection molding is performed, the support can be efficiently manufactured in the back frame manufacturing process.

According to a second aspect of the present invention, in the first aspect, a reinforcing material is provided around an insertion hole for a headrest stay in a support integrally formed with the back frame.
According to the second invention, since the reinforcing material is provided around the support, the strength of the support can be further increased.

According to a third aspect of the present invention, in the second aspect, the upper portion of the back frame that supports the headrest is composed of two plate members that are aligned in the front-rear direction, and the front member of the portion where the support is formed is A through-hole penetrating in the front-rear direction is formed, and cut and raised pieces bent rearward are formed on both sides of the through-hole, and a rear member of the portion where the support is formed is the front side A bent portion that is bent so as to protrude toward the through hole of the member is formed, and the support is molded so as to include the cut and raised piece of the front member and the bent portion of the rear member, An insertion hole for the headrest stay is formed in a portion surrounded by a cut and raised piece of the front member and a bent portion of the rear member.
According to the third invention, the support is formed so as to include the cut and raised pieces of the front member and the bent portions of the rear member, so the cut and raised pieces of the front member and the bent portions of the rear member are provided. Can be a support reinforcement. That is, it is possible to reinforce the periphery of the insertion hole for the headrest stay of the support using the structure of the back frame configured by combining two plates from the front-rear direction.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the support selectively selects a main body portion that receives and holds the headrest stay, and an insertion position of the headrest stay into the main body portion. A lock part having a lock mechanism for fixing, the main body part is formed integrally with the back frame, and the lock part is formed separately from the main body part and can be coupled to the main body part It is said that it is said.
According to the fourth aspect of the present invention, when the vehicle seat is used, the lock portion is exposed to the outside, but the main body portion is covered with the lock portion. Therefore, it is not necessary to consider the appearance of the main body, and materials and manufacturing methods can be selected under conditions with few restrictions.

It is a disassembled perspective view which shows the principal part of this invention in 1st Embodiment of this invention. It is a front view which shows the back frame upper part of the said 1st Embodiment. It is the III-III line expanded sectional view of FIG. It is a disassembled perspective view which expands and shows the characteristic part of this invention in the back frame of the said 1st Embodiment. It is a front view which expands and shows the characteristic part of this invention in the back frame of the said 1st Embodiment. It is a fragmentary longitudinal cross-sectional view which expands and shows the main-body part and lock part of the support of the said 1st Embodiment. It is a perspective view which expands and shows the characteristic part in 2nd Embodiment of this invention. It is a perspective view which expands and shows the characteristic part in 3rd Embodiment of this invention.

<First embodiment>
1 to 6 show a first embodiment of the present invention. The first embodiment shows an example in which the present invention is applied to a so-called separate type automobile front seat in which one passenger can be seated. In each figure, each direction when the seat is mounted on the automobile is shown by arrows. In the following description, the description regarding the direction is made based on this direction.
In FIG. 1, only the upper part of the seat back is shown, and the back pad 50 and the headrest 40 are only shown while omitting the description of the back pad and the seat skin.
The back frame 50 is formed by welding an upper frame 52 and a lower frame (not shown) in a frame shape to the side frames 51 in the same manner as known. A pair of resin supports 30 are provided on the upper frame 52 in the left-right direction, and the headrest 40 is detachably attached by these supports 30. The support 30 includes a main body portion 31 provided integrally with the upper frame 52 and a lock portion 35 that is detachably attached to the main body portion 31.

As shown well in FIG. 6, the main body 31 is integrally provided with protrusions 32 protruding upward on both the left and right sides, and the lock part 35 protrudes downwardly. An engaging piece 36 that fits outside is provided. Each protrusion 32 is formed with a protrusion 33 protruding outward in the opposite direction, and each locking piece 36 is formed with a locking hole 37 for receiving each protrusion 33.
FIG. 6 shows a state in which the lock portion 35 is attached to the main body portion 31, and the lock portion 35 can be removed from the main body portion 31 by removing each protrusion 33 from each locking hole 37 from this state. .
Insertion holes 34 and 38 into which a pair of left and right headrest stays 41 and 42 of the headrest 40 are inserted in each of the main body portion 31 and the lock portion 35 provided on the left and right sides of the upper frame 52, similarly to a known support. Is formed.
Like the known support, the lock portion 35 is provided with a locking claw (not shown) (corresponding to the lock mechanism in the present invention), while the headrest stay 42 has a part of the outer periphery shown in FIG. Thus, a locking groove 43 is formed. The locking claw of the locking portion 35 is engaged with the locking groove 43 of the headrest stay 42 inserted into the insertion hole 34 by pressing an operation portion (not shown) formed on the side portion of the locking portion 35. It is configured to move from the stopped state to the unlocked state. Therefore, similarly to the known headrest, the height of the headrest 40 can be set to an arbitrary height by operating the operation portion of the lock portion 35 and changing the position of the locking groove 43 of the headrest stay 42 to which the locking claw is locked. The height can be adjusted.

The upper frame 52 of the back frame 50 is formed by combining the front member 10 and the rear member 20 as well shown in FIG. The front member 10 is a member having a U-shaped cross section from which one side of the rectangular cylinder is removed as a whole, and a portion corresponding to the removed side is disposed rearward.
On the other hand, the rear member 20 is a plate-like member provided as a whole so as to compensate for a portion corresponding to the removed side of the front member 10. Therefore, the front member 10 and the rear member 20 are combined together to form a rectangular tubular upper frame 52 as a whole.
A through hole 12 is formed in the front side surface of the front member 10 where the main body portion 31 of the support 30 is provided, and the cut and raised pieces 11 cut out to form the through hole 12 are directed rearward. It is bent. Further, through holes 13 are also formed in portions corresponding to the upper and lower surfaces of the cut and raised pieces 11 on the upper and lower surfaces of the front member 10. Each through-hole 13 is formed larger than the through-hole 12 in the left-right direction, and the left-right region sandwiched by the left and right edge portions of the through-hole 13 includes all the left-right regions sandwiched by the left and right cut and raised pieces 11. Is set to
At the position where the main body 31 of the support 30 of the rear member 20 is provided, the plate material is bent forward and the bent portion 21 is formed. The bent portion 21 is vertically divided into two, and a through hole 22 is formed between the upper and lower bent portions 21 to penetrate the plate material in the front-rear direction. The upper and lower bent portions 21 are bent at right angles at two locations on the front side, and the upper and lower bent portions 21 protrude toward a region sandwiched between the left and right cut and raised pieces 11 of the front member 10. . At this time, the left and right widths of the upper and lower bent portions 21 are narrower than the width of the left and right cut and raised pieces 11 of the front member 10.

The main body 31 of the support 30 is integrally formed with the upper frame 52 by insert molding. That is, the upper frame 52 formed as described above is fixed in a resin injection mold, and resin injection molding is performed at a position where the main body 31 of the support 30 of the upper frame 52 is to be provided.
At this time, the injection mold is designed so that the main body 31 has the shape shown in FIG. That is, in the left-right direction, the resin is filled in the range sandwiched between the left and right edge portions of the upper and lower through holes 13 of the front member 10, and in the front-rear direction, the front and rear members of the front member 10 are filled. The resin is filled in a range sandwiched between the rear surfaces of the 20. However, an insertion hole 34 into which the headrest stays 41 and 42 can be inserted is formed at the center of the left and right front and rear regions.
Further, in the vertical direction, the resin is filled in a range sandwiched between the upper surface and the lower surface of the front member 10, and the above-described protruding portion 32 is formed to protrude around the insertion hole 34. The
Thus, the area | region where resin is filled by injection molding of resin is equivalent to the space in this invention.

According to the first embodiment, since the main body portion 31 of the support 30 is integrally formed by resin injection molding in a predetermined space of the upper frame 52 of the back frame 50, the periphery of the main body portion 31 of the support 30 is upper. A support having the necessary strength can be configured without using a specially reinforced support as in the prior art, which is reinforced by the front member 10 and the rear member 20 of the frame 52. Specifically, since the main body portion 31 of the support 30 is formed so as to include the cut and raised pieces 11 of the front member 10 and the bent portions 21 of the rear member 20, the cut and raised pieces 11 of the front member 10 are formed. The bent portion 21 of the rear member 20 can be used as a reinforcing material for the main body portion 31. That is, the area around the insertion hole 34 for the headrest stay in the main body 31 can be reinforced by using the structure of the upper frame 52 configured by combining the two members 10 and 20 from the front-rear direction.
In addition, since the main body 31 of the support 30 is directly formed by so-called insert molding in which the upper frame 52 is held in the mold and injection molding is performed, the main body 31 of the support 30 is manufactured in the manufacturing process of the upper frame 52. Can also be efficiently manufactured. That is, the process can be shortened and the processing cost can be reduced.
In addition, since the main body 31 of the support 30 is directly formed on the upper frame 52 using a mold, compared to a conventional case in which a bracket is welded and fixed to the upper frame and the support is held by the bracket, The positional accuracy of the insertion holes 34 and 38 into which the headrest stays 41 and 42 are inserted can be greatly improved, and the occurrence of defective products can be reduced. Furthermore, since the bracket is unnecessary, cost reduction, weight reduction, and processing cost reduction can be achieved.
As in the case of the conventional support, the lock portion 35 of the support 30 covers the back frame 50 with a back pad (not shown), and further covers the seat skin (not shown), and then the seat skin around the insertion hole 34. It attaches to the main-body part 31 so that may be hold | suppressed. Therefore, when used as a sheet, the lock portion 35 is exposed to the outside, but the main body portion 31 is covered. Therefore, it is not necessary to consider the appearance of the main body 31, and it is possible to select materials and manufacturing methods under conditions with few restrictions. That is, an inexpensive material can be used without considering appearance as the resin forming the main body 31.

<Second Embodiment>
FIG. 7 shows a second embodiment of the present invention. The feature of the second embodiment over the first embodiment described above is that the structure of the rear member 20 constituting the upper frame 52 of the back frame 50 is changed. Others are the same, and illustration and description of the same parts are omitted.
Also in the second embodiment, a bent portion 23 is formed in the same manner as the bent portion 21 of the first embodiment. The bent part 23 is not divided vertically like the bent part 21 but is integrally formed long in the vertical direction. On the other hand, a cutout hole 25 is formed in each of the center portions in the vertical direction of the left and right side portions of the bent portion 23, and the left and right sides of the bent portion 23 pass through the cutout holes 25. The cut and raised pieces 24 cut to form the respective cut holes 25 are formed so as to be flush with the plane of the rear member 20.
The rear member 20 in the second embodiment is combined with the front member 10 in the same manner as the rear member 20 in the first embodiment, and the main body 31 of the support 30 is formed by insert molding. Therefore, even the back frame 50 using the rear member 20 of the second embodiment can achieve the same effects as described above with respect to the first embodiment.

<Third embodiment>
FIG. 8 shows a third embodiment of the present invention. The third embodiment is characterized in that the structure of the rear member 20 constituting the upper frame 52 of the back frame 50 is changed with respect to the first embodiment described above. Others are the same, and illustration and description of the same parts are omitted.
Also in the third embodiment, a bent portion 26 is formed in the same manner as the bent portion 21 of the first embodiment. The bent part 26 is not divided vertically like the bent part 21 and is integrally formed long in the vertical direction. On the other hand, a reverse bent portion 27 that is bent in the rearward direction opposite to the bent portion 26 is formed at the central portion in the vertical direction of the front side portion of the bent portion 26.
The rear member 20 in the third embodiment is combined with the front member 10 in the same manner as the rear member 20 in the first embodiment, and the main body 31 of the support 30 is formed by insert molding. Therefore, even the back frame 50 using the rear member 20 of the third embodiment can achieve the same effects as those described above with respect to the first embodiment.

As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible in the range which does not change the summary of this invention. For example,
1. In the above embodiment, the reinforcing material around the insertion hole for the headrest stay in the support is integrated with the upper frame of the back frame, but may be a separate body.
2. In the above embodiment, the present invention is applied to a front seat for an automobile, but may be applied to a rear seat for an automobile. Further, the present invention may be applied to seats for airplanes, ships, trains, and the like.

10 Front member 11 Cut and raised piece (reinforcing material)
12, 13 Through-hole 20 Rear member 21 Bending portion (reinforcing material)
22 Through-hole 23 Bent part (reinforcing material)
24 Cut and raised piece 25 Cut hole 26 Bending part (reinforcing material)
27 Reverse bending part 30 Support 31 Main body part 32 Projection part 33 Projection 34 Insertion hole 35 Lock part 36 Locking piece 37 Locking hole 38 Insertion hole 40 Headrest 41, 42 Headrest stay 43 Locking groove 50 Back frame 51 Side frame 52 Upper flame

Claims (3)

A vehicle seat that supports a support that supports a headrest on a back frame that is a skeleton of a seatback, a headrest stay is inserted into an insertion hole of the support, and the headrest is attached to the seatback.
Forming a space for inserting the support in the back frame;
A vehicle seat characterized in that the back frame is held in a mold to perform resin injection molding, and the support is formed in the space by integral molding. In claim 1,
A vehicle seat, wherein a reinforcing material is provided around an insertion hole for a headrest stay in a support integrally formed with the back frame. In claim 1 or 2,
The support includes a main body portion that receives and holds the headrest stay, and a lock portion that includes a lock mechanism that selectively fixes an insertion position of the headrest stay into the main body portion,
The main body is formed integrally with the back frame,
The vehicle seat according to claim 1, wherein the lock portion is formed separately from the main body portion and is connectable to the main body portion.

Images