WO2016046884A1

WO2016046884A1 - Headrest support structure and vehicle seat

Info

Publication number: WO2016046884A1
Application number: PCT/JP2014/075082
Authority: WO
Inventors: 邦彦又野; 濱野　芳久
Original assignee: ジョンソンコントロールズテクノロジーカンパニ－; 邦彦又野; 濱野　芳久
Priority date: 2014-09-22
Filing date: 2014-09-22
Publication date: 2016-03-31
Also published as: JPWO2016046884A1; JP6367344B2

Abstract

A headrest support structure (K) is configured so as to include: a seat back frame (4) received within the seat back (3) of a vehicle seat (1); and a holder bracket (9) affixed by welding to a seat back frame (4b). The holder bracket (9) has a cylindrical body (9a) and an arm (9b) which extends outward from the body (9a). The front end portion of the arm (9b) is affixed by welding to the seat back frame (4b). In the headrest support structure (K), the stay (7) of a headrest (5) is inserted into a stay holder (8) fitted in the body (9a), and thereby the headrest (5) is supported.

Description

Headrest support structure and vehicle seat

The present invention relates to a headrest support structure and a vehicle seat.

The headrest is detachably supported by a seat mounted on a vehicle (for example, an automobile).
The support structure includes a cylindrical holder bracket welded and fixed to an upper frame of a seat back frame housed in the seat, and a cylindrical stay holder fitted into the holder bracket. The headrest stay extending from the headrest main body is attached to the stay holder so that the vertical position can be adjusted and the headrest stay can be inserted and removed.
Such a headrest support structure is described in Patent Document 1.

JP 2012-046158 A

The structure described in Patent Document 1 has a clinching side surface in which a holder bracket is clinched, and the clinching side surface and an upper frame are fixed by welding.
Therefore, if the clinching side face and the upper frame are not welded carefully, the melt flows into the holder bracket from the seam of the clinching side face to form a protruding part that protrudes inward, and the insertion space for the stay holder is narrowed. There was a risk of it.
In this case, there is a problem that insertion of the stay holder into the holder bracket is hindered, or even if the stay holder can be inserted, it is deformed inward by the convex portion, making it difficult to insert and remove the headrest stay. Quality deteriorates.
Therefore, there has been a demand for an improvement that can be easily manufactured and the quality is stabilized by eliminating the inflow of the melt into the holder bracket during welding regardless of the welding work quality.

In order to meet such a demand, an object of the present invention is to provide a headrest support structure and a vehicle seat that are easy to manufacture and can stably maintain product quality.

According to a first aspect of the present invention, a seat back frame housed inside a seat back of a vehicle seat, and a holder bracket welded and fixed to the seat back frame, the holder bracket is a cylinder. A main body portion and an arm portion extending outward from the main body portion, and a distal end side portion of the arm portion is welded and fixed to the seat back frame, and is fitted into the main body portion. A headrest support structure for supporting the headrest by inserting a headrest stay of the headrest into the stay holder is provided.

According to the second aspect of the present invention, there is provided a vehicle seat to which a headrest can be attached, wherein the seat back, a seat back frame housed in the seat back, and the seat back frame are fixed by welding. A holder bracket, and the holder bracket includes a cylindrical main body portion and an arm portion extending outward from the main body portion, and a distal end side portion of the arm portion is provided on the seat back frame. There is provided a vehicle seat that is fixed by welding and configured to support the headrest by inserting the headrest stay of the headrest into a stay holder that is fitted in the main body.

According to the headrest support structure and the vehicle seat of the present invention, the manufacture is easy and the quality of the product can be stably maintained.

FIG. 1 is a schematic side view showing a headrest support structure K and a vehicle seat 1 which are examples of the headrest support structure and the vehicle seat according to the embodiment. FIG. 2 is a perspective view showing the seat back frame body 4 housed in the vehicle seat 1. FIG. 3 is a perspective view for explaining an attachment state of the holder bracket 9 included in the headrest support structure K. FIG. FIG. 4 is a side view of the holder bracket 9. FIG. 5 is a rear view of the holder bracket 9. FIG. 6 is a top view of the holder bracket 9. FIG. 7 is a plan view showing a flat plate material 9 p that is a material of the holder bracket 9. FIG. 8 is an assembly diagram for explaining the headrest support structure K. FIG.

1 to 8, a headrest support structure and a vehicle seat according to an embodiment will be described with reference to a headrest support structure K and a vehicle seat 1 which are preferred examples. In FIGS. 1 to 3 and 8, the traveling direction of the vehicle is the front, and the front, rear, left, right, and up and down directions are indicated as FR, RR, LH, RH, UP, and LWR.

(Example)
The headrest support structure K and the vehicle seat 1 (hereinafter also simply referred to as the seat 1) and the headrest 5 that can be attached to and detached from the seat 1 will be described with reference to FIGS. 1 and 2.

The seat 1 has a seat cushion 2 and a seat back 3.
Inside the seat back 3, a seat back frame body 4 serving as a skeleton of the seat back 3 is housed.
A headrest 5 is attached to the upper end of the seat back 3 so as to be insertable / removable in the direction of the arrow Da in FIG.

The headrest 5 has a headrest frame body 6 that is a skeleton of the headrest 5. The headrest frame body 6 has a headrest stay 7 that is exposed from the headrest 5 and extends obliquely forward and downward. A pair of headrest stays 7 are provided apart from each other in the direction orthogonal to the paper surface.
The headrest 5 is attached to the seat back 3 by the headrest stay 7 being supported by the headrest support structure K.
The headrest support structure K includes a seat back frame body 4 and a holder bracket 9 welded and fixed to an upper portion thereof, and the headrest stay 7 is supported by the holder bracket 9 via the stay holder 8. Yes.

FIG. 2 is a perspective view showing an example of the seat back frame body 4.
The seat back frame body 4 is connected by a connecting portion 4c such that, for example, a seat back frame 4a for one person and a seat back frame 4b for two persons can be independently rotated in the front-rear direction (see arrow Da). ing.
The

seat back frames

4a and 4b have frame frames 4a1 and 4b1 formed in a substantially rectangular frame shape.

The top frames 4a2 and 4b2 which are at the uppermost positions of the frame frames 4a1 and 4b1 and extend in the horizontal direction have a plurality of headrests 5 so that the headrest 5 can be mounted at a position corresponding to the head of the occupant seated on the seat 1. A holder bracket 9 is attached.
Specifically, the top frame 4a2 is provided with a pair of holder brackets 9 as headrest support portions HS1. Two pairs of holder brackets 9 are provided on the top frame 4b2 as headrest support portions HS2 and HS3.

Next, details of the holder bracket 9 will be described with reference to FIGS.
The holder bracket 9 has a cylindrical main body 9a and an arm 9b extending outward from the main body 9a. Specifically, the arm portions 9b are bent from a peripheral portion 9s that forms the peripheral surface of the main body portion 9a, extend outward, and are provided as a pair facing each other.
The arm portion 9b extends along a surface (a surface extending in the front-rear and up-down directions in FIG. 3) that crosses the main body portion 9a in parallel with the axis CL1.
The pair of arm portions 9b extend in parallel to each other. Moreover, it forms in the position which becomes equal distance La with respect to plane SF1 containing axis line CL1 (refer FIG. 6).
The holder bracket 9 is integrally formed by pressing and bending a metal plate material.
Specifically, a flat plate material 9p (see FIG. 7) having a shape in which the holder bracket 9 is developed is punched from a metal plate material (for example, an iron plate), the punched flat plate material 9p is bent, and a tubular main body 9a is formed. And the flat arm portion 9b are integrally formed.
In the development view of FIG. 7, the reference numerals of the parts after molding are indicated with ().

The pair of arm portions 9b is formed at an intermediate portion of the main body portion 9a in the direction of the axis CL1. That is, both end sides in the direction of the axis line CL1 of the main body 9a are all-around connecting

portions

9c, 9d in which a flat plate material is bent in an annular shape to form a tube, and both tip portions 9p1, 9p2 are connected and connected. ing.
The all-around connecting

portions

9c and 9d are formed in a tubular shape with the same inner diameter φa. The inner diameter φa is larger than twice the distance La.
The all-around connecting portion 9c is on the upper side when the holder bracket 9 is attached to the top frame 4b2, and the connecting portion 9d is on the lower side.
Since the entire circumference connecting portion 9c is formed on both ends in the direction of the axis CL1, an opening portion 9g is formed in an intermediate portion including a portion where the arm portion 9b is bent, that is, a portion other than the all

circumference connecting portions

9c and 9d. However, the inner surface of the main body portion 9a forms a through hole 9f having the main body portion 9a substantially as a full length.
A positioning portion 9c1 that is wound in a rectangular shape is formed at the end of the all-around connecting portion 9c.

A well-known method is applied to the circumferential connection in the all-

circumference coupling portions

9c and 9d.
For example, as shown in FIG. 7, an uneven engagement portion corresponding to a fitting portion between a tenon and a mortise is formed as a joint portion 9e and connected.
Specifically, in the flat plate material 9p, an inverted trapezoidal convex portion 9a1 that becomes wider toward the tip side and an inverted trapezoidal concave portion 9a2 that becomes wider toward the rear side, which become the joint portion 9e of the uneven engagement after processing, are formed. Then, in bending, both parts are fitted and connected in the circumferential direction.

As another method, the bent flat plate material 9p is fitted on the outside of a bar-shaped receiving jig whose outer diameter is equal to the inner diameter φa of the all-around connecting

portions

9c and 9d, and the end faces are brought into close contact with each other and struck from outside. The eyes 9e may be formed and joined together.
In this case, since a receiving jig is inserted into the main body portion 9a, no inward projection occurs due to deformation by caulking. As a result, the inner diameter is secured with φa.

A concave edge portion 9b1 is provided on the upper edge on the distal end side of the arm portion 9b by being curled in an arc shape.
The curvature radius of the concave edge portion 9b1 is the same as the curvature radius of the peripheral surface of the top frame 4b2.
Therefore, when the concave edge portion 9b1 is applied to the top frame 4b2, the end surface 9b1a of the concave edge portion 9b1 is in close contact with the peripheral surface 4b2a of the top frame 4b2.
Welding is performed on the closely contacted portion, and the holder bracket 9 and the top frame 4b2 are fixed. The weld site W is indicated by a thick dashed line in FIG. In FIG. 4, a part of the outline of the top frame 4b2 is further shown by a two-dot chain line, and the position of the axis CL2 is also shown.

The pair of holder brackets 9 constituting the headrest support portion HS3 are attached to the top frame 4b2 such that the axis line CL1 is inclined forward at the same angle θa (see FIG. 4) with respect to the extending surface CLV of the frame frame 4b1. .
The holder bracket 9 has a shape of the arm portion 9b so that the position Wa closest to the main body portion 9a side of the welded portion W and the main body portion 9a are sufficiently separated from each other.
Thereby, there is almost no possibility that the melt flows from the welded part W and reaches the main body portion 9a during welding fixation. Therefore, the melt does not flow into the main body portion 9a to form a portion protruding inward.

Next, the stay holder 8 inserted into the holder bracket 9 and the headrest stay 7 inserted into the stay holder 8 will be described with reference to FIG.
The stay holder 8 is formed in a cylindrical shape with resin.
The intermediate portion in the axial direction is a cylindrical main body 8a having a constant outer diameter.
One end side (lower side in FIG. 8) of the main body portion 8a is provided with an insertion portion 8c that increases in diameter via the stepped portion 8b and decreases in diameter from the increased peripheral portion toward the tip. The outermost outer diameter of the insertion portion 8c is smaller than the outer diameter of the main body portion 8a.
The stay holder 8 has a slit 8d that extends from the distal end of the insertion portion 8c to a middle position of the main body portion 8a. A pair of slits 8d are formed with a 180 ° shift in the circumferential direction.

The other end side (upper side in FIG. 8) of the main body 8a is provided with a head 8e that is a part exposed to the outside from the seat back 3 in use.
The stay holder 8 has a through hole 8f that penetrates the head portion 8e, the main body portion 8a, and the insertion portion 8c with the same inner diameter.
The head 8e is provided with an engaging claw (not shown) that advances and retreats in the through hole 8f, and a knob 8e1 that interlocks with the advancing and retreating of the engaging claw.
The engaging claw is normally biased so as to enter the inside of the through hole 8f, and is retracted from the through hole 8f by pushing the knob 8e1 against the biasing force.

A positioning convex portion 8a1 that engages with the positioning portion 9c1 of the holder bracket 9 is formed at a part in the circumferential direction at the end of the main body portion 8a on the head 8e side.
The headrest stay 7 has circumferential grooves 7a formed at a plurality of positions separated in the axial direction.

The stay holder 8 is used by being fitted into the holder bracket 9.
In this insertion, the reduced diameter slope of the insertion portion 8c serves as a guide, and the insertion portion 8c bends to narrow the slit 8d, thereby facilitating insertion of the main body portion 9a into the through hole 9f.
When the insertion portion 8c is pulled out to the lower end of the through hole 9f, the bending for narrowing the slit 8d spreads so as to return to the original state by the elastic repulsion force.
Thereby, the step part 8b is latched to the lower end surface of the main body part 9a, and the removal from the holder bracket 9 is prevented. The insertion portion 8c in the insertion completion state is indicated by a one-dot chain line in FIG.
Further, in this insertion process, the positioning convex portion 8a1 engages with the positioning portion 9c1, and the circumferential direction of the stay holder 8 with respect to the holder bracket 9 is determined.

The headrest 5 is attached to the seat back 3 by being supported by the headrest support structure K by inserting the headrest stay 7 into the stay holder 8 inserted into the holder bracket 9.
The engagement claw is engaged with the circumferential groove 7a at a predetermined insertion position, and the vertical movement of the headrest stay 7 is restricted. Since the engagement claw can be disengaged by pressing the knob 8e1, the height position of the headrest 5 relative to the seat back 3 is determined in a stepwise manner in accordance with the positions of the plurality of circumferential grooves 7a.

In the headrest support structure K described above, the outer diameter of the main body 8a of the stay holder 8 is substantially equal to or slightly larger than the inner diameter of the through hole 9f of the main body 9a in the holder bracket 9.
Thereby, the inner surface of the through hole 9f and the outer peripheral surface of the main body 8a are substantially in close contact with each other, and the contact area between both surfaces is increased.
Further, the outer diameter of the headrest stay 7 is substantially equal to or slightly larger than the inner diameter of the through hole 8 f of the stay holder 8.
Thereby, the outer peripheral surface of the headrest stay 7 and the inner surface of the through hole 8f are substantially in close contact with each other, and the contact area between both surfaces is increased.
Therefore, the headrest support structure K can support the headrest stay 7, that is, the headrest 5 with a high support force.

Further, in the headrest support structure K, the welding portion W that is welded and fixed to the top frame 4b2 is separated from the main body portion 8a. This separation distance is secured, for example, 5 mm or more.
Therefore, in the welding between the holder bracket 9 and the top frame 4b2, there is almost no possibility that the melt reaches the main body portion 9a.
This prevents the melt from solidifying in the through hole 9f of the main body 9a so as to form a portion that protrudes inwardly, so that the stay holder 8 can be inserted into the holder bracket 9 and the headrest stay 7 can be attached to the stay holder 8. Insertion is not hindered and each insertion can be performed satisfactorily.

The present invention is not limited to the embodiment described above, and various modifications can be made without departing from the spirit of the present invention.
The shape of the concave edge portion 9b1 to be the welded portion W, the position of the peripheral surface 4b2a of the top frame 4b2 to which the concave edge portion 9b1 is joined, the distance between the concave edge portion 9b1 and the main body portion 9a, and the axis of the holder bracket 9 The direction length can be appropriately set according to the shape of the seat back 3 and the position and shape of the seat back frame body 4.
The distance between the pair of arm portions 9b of the holder bracket 9 may not be constant. As a step, the concave edge portion 9b1 side may be wider than the main body portion 9a side.
The cylindrical shape of the holder bracket 9 may not be a cylinder. A square tube or an elliptical tube may be used.

In the embodiment, the main body portion 9a and the arm portion 9b of the holder bracket 9 are integrally formed from the same plate material. However, the present invention is not limited to this. For example, the main body portion 9a and the arm portion 9b may be formed from separate members, and may be combined and integrated by a known method such as welding, adhesion, or caulking.

The vehicle is not limited to an automobile, and may be a moving body that moves an occupant in a seated state, such as an aircraft, a ship, and a rail car.

The present invention can be used for a seat mounted on a vehicle (automobile, aircraft, ship, railway vehicle, etc.) for moving an occupant in a seated state and a support structure for a headrest mounted on the seat.

Claims

A seat back frame housed inside the seat back of a vehicle seat;
A holder bracket welded and fixed to the seat back frame;
Including
The holder bracket is
A cylindrical main body portion and an arm portion extending outward from the main body portion, and a distal end side portion of the arm portion is fixed by welding to the seat back frame;
A headrest support structure for supporting the headrest by inserting a headrest stay of the headrest into a stay holder fitted in the main body.
The main body portion has an all-around connecting portion that connects the entire circumference by forming a joint portion that connects the tips of the plate materials bent into a tubular shape, and the arm portion is a peripheral portion other than the all-around connecting portion. The headrest support structure according to claim 1, wherein the headrest support structure is bent outward from the head and extended.
3. The headrest support structure according to claim 2, wherein the all-around connecting portion is provided at both end portions of the main body portion.
The headrest support structure according to any one of claims 1 to 3, wherein the arm portions are provided as a pair extending in parallel with an axis of the main body portion and facing each other.
The headrest support structure according to any one of claims 1 to 4, wherein a tip side portion of the arm portion is a recess that is rolled with the same curvature as the curvature of the outer peripheral surface of the seat back frame.
A vehicle seat that can be fitted with a headrest,
Seat back,
A seat back frame housed inside the seat back;
A holder bracket welded and fixed to the seat back frame;
With
The holder bracket is
A cylindrical main body portion and an arm portion extending outward from the main body portion, and a distal end side portion of the arm portion is fixed by welding to the seat back frame;
A vehicle seat configured to support the headrest by inserting a headrest stay of the headrest into a stay holder fitted in the main body.