JP2004283287A - Headrest - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a headrest supporting the head of a user comfortably. <P>SOLUTION: A stay frame assembly 20 to be a skeleton of this headrest 10 comprises a leg part frame 22 which has left/right leg parts 23 and 24 mounting the headrest 10 on a seat and extending downward; a head part frame 21 to be an upper skeleton of the headrest 10; and a head/leg connecting mechanism 30 having a parallel link 40 for connecting the head frame 21 to the upper part of the leg frame 22 so as to move in the front/rear direction. The headrest 10 is so formed that the head frame 21 is fixed to an inner case 50 storing the head part frame 21 and the head/leg connecting mechanism 30, and the headrest 10 mounted on the seat can be slid in the front/rear direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
[Field of the Invention]
The present invention relates to a headrest to be mounted on a backrest of a seat for various vehicles such as an automobile, office work, medical examination or furniture.
[0002]
[Prior art]
A conventional headrest equipped with an angle adjustment mechanism that allows the headrest to be tilted is attached to the upper part of the leg frame so that the headrest can be tilted in the front-rear direction and the leg frame having a leg portion extending downward. A stay frame assembly having an angle adjustment mechanism that adjusts an inclination angle of the head frame in the front-rear direction with respect to the leg frame, and a substantially box shape that houses the head frame and the angle adjustment mechanism An inner case having a main body part, a substantially box-shaped skin of the contour of the headrest, and a foam (pad) integrally foamed with the skin by foaming a foaming stock solution inside the skin so as to wrap the body part of the inner case (For example, refer patent document 1).
[0003]
[Patent Document 1]
JP 2000-83757 A (paragraph 0011)
[0004]
[Problem to be Solved by the Invention]
However, in such a conventional headrest with an angle adjustment mechanism, when the head of a user (especially a person using a passenger seat or a rear seat) is placed on the headrest and the headrest is tilted forward, the headrest moves the head. When the headrest is tilted backward, the user feels uncomfortable as if the face is facing the ceiling and the head is bent extremely backward. Can't be comfortably supported by the headrest.
[0005]
For this reason, the development of a headrest that can comfortably support the user's head has been an issue in the field of headrests that are mounted on the backrests of seats for various vehicles, offices, examinations, or furniture.
[0006]
Accordingly, an object of the present invention is to provide a novel headrest that allows the headrest to slide in the front-rear direction.
[0007]
[Means for Solving the Problems]
The headrest of the present invention that achieves the above-described object includes a leg frame having left and right legs that extend downward to attach the headrest to a seat, and a head frame that is a skeleton above the headrest. And a head / leg connecting mechanism for connecting the head frame to the upper part of the leg frame so as to be movable in the front-rear direction.
[0008]
The head frame includes a head-side beam that is long on the left and right, and a head-side bracket that is fixed to face the left and right sides of the head-side beam. Further, the leg frame is composed of a left and right leg lateral beam that is fixed to the left and right legs, and a leg bracket that is fixed to face the left and right sides of the leg lateral beam. .
[0009]
The head / leg connecting mechanism includes a head side bracket of the head frame, a leg side bracket of the leg frame, and a left and right parallel link that connects the head side bracket and the leg side bracket. Each of the left and right parallel links includes a front side link member that connects the head side bracket and the leg side bracket, and a rear side link member that connects the head side bracket and the leg side bracket.
[0010]
The headrest of the present invention has an inner case that houses the head frame and the above-described head / leg coupling mechanism.
[0011]
The inner case is coupled to the bottom surface of the main body portion so as to leave a gap between the head frame and the substantially box-shaped main body portion that accommodates the head and leg coupling mechanism, and the bottom surface of the main body portion. It consists of a plate part formed with long slots on the left and right before and after communicating with the inside. Here, each leg portion of the leg frame extends through the plate portion through each of the slots communicating between the inside of the main body portion and the outside of the inner case, and extends to the outside of the inner case.
[0012]
The headrest of the present invention has means for integrally connecting the main body part of the inner case and the head frame of the stay frame assembly, and when the inclination of the head frame in the front-rear direction with respect to the leg frame is changed, The inner case is integrated with the head frame, and the inclination of the inner case in the front-rear direction with respect to the leg frame changes.
[0013]
Here, in the headrest of the present invention, at least one of the head-side bracket and the leg-side bracket is for restricting rearward movement of the rear link member of the parallel link to the rear side of the bracket. It has rear side movement restricting means, and may have front side movement restricting means for restricting forward movement of the front side link member of the parallel link on the front side of the bracket.
[0014]
In the headrest of the present invention, the front link member and the rear link member are pivotally attached to the head side bracket and the leg side bracket by bolting via a truncated cone-shaped washer, respectively. .
[0015]
In the headrest of the present invention, in order to prevent the distortion of the stay frame assembly, the head / leg coupling mechanism includes at least one of the left and right links of the front link member and the rear link member of the left and right parallel links. It may further comprise a link member connecting means for connecting members.
[0016]
The headrest of the present invention described above has a hollow interior and an opening communicating with the hollow interior. The contoured skin of the headrest, and the foaming stock solution are foamed inside the skin so as to wrap the main body of the inner case. And a pad molded so as to be integrated with the skin. Here, the peripheral edge portion of the opening of the epidermis inserted into the gap between the bottom surface of the main body portion of the inner case and the plate portion is held in the gap by the pad.
[0017]
The headrest of the present invention may be a see-through type headrest. In this case, the skin and the inner case each include an opening penetrating front and rear through a substantially central portion thereof.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
<Headrest> As shown in FIGS. 3 and 5, the headrest 10 according to the present invention includes a stay frame assembly 20 that is a skeleton of the headrest 10.
[0019]
The stay frame assembly 20 includes a leg frame 22 having left and right leg portions 23, 24 extending downward to attach the headrest 10 to a seat, and a head connected to the upper portion of the leg frame 22 so as to be movable in the front-rear direction. It consists of a frame 21.
[0020]
The leg frame 22 includes a left and right leg side beam 26 fixed to the left and right legs 23 and 24 and a leg side bracket fixed to face the left and right sides of the leg side beam 26. 32.
[0021]
The head frame 21 includes a head lateral beam 25 that is long to the left and right, and a head side bracket 31 that is fixed so as to face the left and right sides of the head lateral beam 25.
[0022]
The stay frame assembly 20 connects the head frame 21 to the upper part of the leg frame 22 so as to be movable in the front-rear direction, so that the head frame 21 can be moved in the front-rear direction with respect to the leg frame 22. A head / leg connecting mechanism 30 for connecting the leg frame 22 and the head frame 21 is further configured.
[0023]
The head / leg connecting mechanism 30 includes a head-side bracket 31 of the head frame 21, a leg-side bracket 32 of the leg frame 22, and a left-right parallel connecting the head-side bracket 31 and the leg-side bracket 32. The link 40 is configured.
[0024]
Each of the left and right parallel links 40 includes a front link member 41 that connects the head-side bracket 31 and the leg-side bracket 32, and a rear-side link member that connects the head-side bracket 31 and the leg-side bracket 32. 42.
[0025]
At least one of the head side bracket 31 and the leg side bracket 32 has a rear side movement restriction for restricting rearward movement of the rear side link member 42 of the parallel link 40 to the rear side of the bracket. And a front movement restricting means for restricting the forward movement of the front link member 41 of the parallel link 40 on the front side of the bracket. Preferably, the front movement restricting means is a flange 33 (see FIG. 8) formed on the front side of the leg side bracket 32 as shown in FIGS. 3, 5, 8 and 9, and the rear movement restricting means is A flange 33 (see FIG. 9) formed on the rear side of the leg-side bracket 32.
[0026]
In the headrest 10 of the present invention, the front link member 41 and the rear link member 42 are decapitated by nuts 36 fixed to the head side bracket 31 and the leg side bracket 32, respectively, as shown in FIGS. The bolts 34 are tightened through conical washers 35 to be pivotally attached.
[0027]
In the headrest 10 according to the present invention, the head / leg coupling mechanism 30 includes at least one of the front link member 41 and the rear link member 42 of the left and right parallel links 40 in order to prevent distortion of the stay frame assembly 20. It may further comprise link member connecting means for connecting the left and right link members. When the head frame 21 and the left and right side brackets 31 on the head side are moved in the front-rear direction with respect to the leg frame 22 by the link member connecting means, the moving direction and distance of the left side bracket 31 on the head side, The moving direction and distance of the right side bracket 31 on the head side coincide with each other, and the distortion of the stay frame assembly 20 is prevented. Preferably, the link member connecting means is fixed to each of the front link members 41 of the left and right parallel links 40 and connects these left and right front link members 41 as shown in FIGS. It is a bar 43.
[0028]
The headrest 10 of the present invention has an inner case 50 that houses the head frame 21 and the head / leg coupling mechanism 30.
[0029]
The inner case 50 has a substantially box-shaped main body 53 that houses the head frame 21 and the above-described head / leg coupling mechanism 30, and a bottom surface of the main body 53 so as to leave a gap 55 between the bottom surface of the main body 53. And a plate portion 54 having long slots 56 formed on the left and right sides before and after communicating with the inside of the main body portion 53. The bottom surface of the main body portion 53 and the plate portion 54 are joined by a partition wall that forms an opening of the slot 56. Here, each of the leg portions 23, 24 of the leg frame 22 is inserted through each of the slots 56 communicating between the inside of the main body portion 53 and the outside of the inner case 50 via the plate portion 54. Extend to the outside of 50.
[0030]
The inner case 50 is preferably composed of two parts, a front part 51 (or a first part) and a rear part 52 (or a second part), as shown in FIGS.
[0031]
As shown in the figure, the front portion 51 includes a front portion of the main body portion 53 of the inner case 50 and a plate portion 54 that is coupled to the bottom surface of the front portion leaving the gap 55 described above. The rear portion 52 includes a rear portion of the main body 53, and the head frame 21 and the head legs of the stay frame assembly 20 are fitted by fitting the periphery of the front portion 51 and the periphery of the rear portion 52. The inside of the main body 53 of the inner case 50 that can accommodate the coupling mechanism 30 in a liquid-tight manner is formed.
[0032]
Such fitting is performed by inserting the other peripheral protrusion into one peripheral groove and tightening both of them together with a latch 58, so that both are securely or liquid-tightly fitted.
[0033]
That is, as shown in the drawing, the left and right and upper parts of the main body 53 of the inner case 50 are provided with peripheral protrusions provided on the peripheral edges of the left and right and upper parts of the front part 51. And is tightly fitted with a latch 58 provided on the left and right and upper peripheral edges.
[0034]
Further, the front portion 51 is provided with a rectangular opening 59 penetrating the substantially central portion of the front portion 51 in the front-rear direction at a substantially center thereof, and a peripheral groove is provided on the inner periphery of the opening 59. . Further, the rear portion 52 is provided with a rectangular opening 59 penetrating the substantially central portion of the rear portion 52 in the front-rear direction at a substantially center thereof, and a peripheral protrusion is provided on the periphery of the opening 59. By inserting this peripheral protrusion into the peripheral groove of the opening 59 and tightening it with a latch 58, the opening 59 of the front portion 51 and the opening 59 of the rear portion 52 are fitted in a liquid-tight manner, and the main body 53 of the inner case 50 is almost fitted. A rectangular opening 59 penetrating the central portion in the front-rear direction is formed. By fitting the front part 51 and the rear part 52 in this way, an opening 59 is formed so as to penetrate the main body 53 of the inner case 50 in the front-rear direction. When injected between the main body 53 of the inner case 50 and the outer skin 60, the injected foaming solution wraps the main body 53 efficiently, and does not generate a cavity in the foamed pad 61. Pads 61 are formed so as to be entangled.
[0035]
As shown in the drawing, the plate portion 54 is formed with two slots 56 communicating with the inside of the front portion 51. The leg portions 23 and 24 of the leg frame 22 are extended outside the front portion 51 through the slots 56 as shown in the figure. The front side of the head frame 21 and the head / leg coupling mechanism 30 is disposed inside the front portion 51. As described above, the rear portion 52 is fluid-tightly fitted to the front portion 51 on which the front side of the head frame 21 and the head / leg coupling mechanism 30 is arranged as described above, whereby the head frame 21 and the head / leg coupling mechanism 30. Is housed inside the main body 53 of the inner case 50.
[0036]
The headrest 10 of the present invention has means for integrally connecting the main body 53 of the inner case 50 and the head frame 21 of the stay frame assembly 20.
[0037]
As shown in FIGS. 3, 5, 8, and 9, this means passes through the holes provided in the flanges formed on the front side and the rear side of the head side bracket 31, and the front part 51 and the rear part of the main body 53 of the inner case 50. Each of the portions 52 can be fixed by bolting.
[0038]
Thus, since the main body 53 of the inner case 50 and the stay frame assembly 20 are integrally connected, when the head frame 21 is moved in the front-rear direction with respect to the leg frame 22, the inner case 50 is It moves integrally with the head frame 21 and moves in the front-rear direction with respect to the leg frame 22. Here, the shape of the slot 56 formed in the plate portion 54 is a substantially elliptical shape that is long in the front-rear direction so that the inner case 50 and the head frame 21 can move together in the front-rear direction with respect to the leg frame 22. It is in.
[0039]
A plurality of windows communicating with the gap 55 between the plate portion 54 are formed in the central rear portion exposed to the outside of the inner case 50, and a foaming stock solution inlet 57 penetrating the plate portion 54 is provided in the central rear portion. It is formed through the part.
[0040]
The skin 60 (shown by broken lines in FIGS. 2 to 9) is obtained by sewing several pieces of skin material into a substantially box shape that matches the final desired contour of the headrest 10. The seam allowance must be hidden inside instead of being exposed to the front for reasons of appearance. Therefore, when sewing, the back side of the skin material piece is sewn with the front side facing up, and then the surface side is turned upside down and turned over. Like that. In order to enable this inversion, an opening is formed in a portion corresponding to the bottom surface of the headrest 10 in the skin 60 that is sewn in a substantially box shape. This opening is also used as an opening for inserting the inner case 5050 containing the stay frame assembly 20. (Here, when the headrest 10 is a see-through type, the skin 60 has an opening at a position corresponding to the see-through portion of the headrest 10, as shown by broken lines in FIGS. 2 to 7. In this case, the front side and the rear side After the two skin material pieces are arranged on the inner case 50, the outer peripheral portion of the skin 60 and the central opening portion (portion corresponding to the opening 59) are sewn.)
[0041]
That is, the skin 60 has a hollow interior and an opening (not shown) that extends to the left and right formed in a portion that communicates with the hollow interior and that corresponds to the bottom surface of the headrest 10. The peripheral portion of the opening of the skin 60 is inserted into a gap 55 between the bottom surface of the main body portion 53 of the inner case 50 and the plate portion 54, as will be described later. At this time, when the foaming stock solution is foamed between the main body 53 and the skin 60, local tensile force is not applied to the peripheral portion of the opening of the skin 60, and the peripheral portion of the opening is the entire skin 60. The peripheral portion of the opening of the skin 60 is held lightly by this gap 55 so that it can move freely so as to allow it to swell.
[0042]
<Manufacturing Method> The headrest 10 is manufactured by first extending the left and right leg portions 23, 24 of the stay frame assembly 20 to the outside through the slot 56 of the front portion 51 of the inner case 5050, and the head frame 21 and leg frame. 22 is inserted into the front portion 51 and fixed, and then the rear portion 52 is fitted into the front portion 51, and the rear portion 52 is fixed to the stay frame assembly 20 with a bolt through a hole in the rear portion 52.
[0043]
Next, the main body 53 of the inner case 50 is wrapped with a substantially box-shaped skin 60 having outer contours on the front side and the rear side of the headrest 10. (When a see-through type headrest is manufactured, the skin 60 has openings at locations corresponding to the see-through portion of the headrest 10, as indicated by broken lines in FIGS. After placing a piece of skin material on the inner case 50, the outer peripheral portion of the skin 60 and the central opening portion (portion corresponding to the opening 59) are sewn, and the body portion 53 of the inner case 50 is wrapped with the skin 60. ) The peripheral edge portion of the lower opening of the skin 60 is inserted into the gap 55 between the bottom surface of the main body portion 53 of the inner case 50 and the plate portion 54.
[0044]
Next, a foaming stock solution injection nozzle (not shown) is inserted into the injection port 57 and placed in a molding die having an interior that matches the contour shape of the headrest 10, the molding die is clamped, and the skin 60 and the inner case 50. The foaming stock solution is injected through the foaming stock solution injection port 57 between the main body portion 53 and the body portion 53 to foam and harden. At this time, the foaming stock solution is impregnated and cured in the peripheral portion of the opening of the skin 60 that is in the gap 55 between the bottom surface of the main body portion 53 of the inner case 50 and the plate portion 54. The peripheral edge portion of the opening of the skin 60 is strongly held in the gap 55, and this opening is completely closed.
[0045]
Finally, the skin 60 molded integrally with the foam is taken out of the mold, and the headrest 10 is manufactured.
[0046]
【The invention's effect】
Since this invention is comprised as mentioned above, there exists an effect that the headrest with which the seat was mounted | worn can be slid in the front-back direction, and a user's head can be supported comfortably.
[Brief description of the drawings]
FIG. 1 is a perspective view of an inner case that houses a stay frame assembly, as viewed from the rear side.
FIG. 2 shows a rear portion of the inner case of FIG.
3 shows a stay frame assembly housed in the front portion when the rear portion of the inner case of FIG. 2 is removed. FIG.
4 shows a front portion of the inner case of FIG. 1. FIG.
5 shows a stay frame assembly housed in the rear part when the front part of the inner case of FIG. 4 is removed. FIG.
6 shows the inner case of FIG. 1 as viewed from below.
FIG. 7 shows the inner case of FIG. 1 as viewed from above.
FIG. 8 is a cross-sectional view taken along line AA of FIGS. 3 and 5, showing the headrest of the present invention moved forward with respect to its legs.
FIG. 9 is a cross-sectional view taken along line AA of FIGS. 3 and 5 and shows the headrest of the present invention moved rearward with respect to its legs.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Headrest 20 ... Stay frame assembly 21 ... Head frame 22 ... Leg frame 23 ... Left leg 24 ... Right leg 25 ... Next to the head Beam 26 ... Leg side beam 30 ... Head-leg coupling mechanism 31 ... Head side bracket 32 ... Leg side bracket 33 ... Flange 34 ... Bolt 35 ... Washer 36-・ ・ Nut 37 ・ ・ ・ Flange 38 ・ ・ ・ Hole 39 ・ ・ ・ Bolt 40 ・ ・ ・ Parallel link 41 ・ ・ ・ Front link member 42 ・ ・ ・ Rear link member 43 ・ ・ ・ Connecting rod 50 ・ ・ ・ Inner Case 51 ... Front part 52 ... Rear part 53 ... Body part 54 ... Plate part 55 ... Gap 56 ... Slot 57 ... Foaming stock solution inlet 58 ... Latch 59 ..Opening 60 ... Skin 61 ... Pa De

Claims (6)

A headrest,
(1) A stay frame assembly that is a skeleton of the headrest,
A substantially inverted U-shape having a left leg and a right leg extending downward for mounting the headrest on the seat, and a laterally long leg lateral beam in which the left leg and the right leg are fixed at a distance. Leg frame,
A head frame having a long lateral beam on the left and right sides above the leg frame, and the leg frame and the head frame so that the head frame can be moved in the front-rear direction with respect to the leg frame. Head-and-leg coupling mechanism for coupling between
Consisting of
The head and leg connecting mechanism is
A left side bracket and a right side bracket on the head side fixed so as to face the left side and the right side of the head side beam,
A left side bracket and a right side bracket fixed to the left side and the right side of the leg side beam so as to face each other;
A parallel link on the left side formed between the left side bracket on the head side and the left side bracket on the leg side, and formed between the right side bracket on the head side and the right side bracket on the leg side. Right parallel link,
Consisting of
The left parallel link is
One end is pivotally attached to the left side bracket on the head side, and the other end is pivotally attached to the left side bracket on the leg side, and parallel to the left side link member on the front side A rear left link member having one end pivotally attached to the rear side of the left bracket on the head side and the other end pivotally attached to the rear side of the left bracket on the leg side. ,
Consisting of
The right parallel link is
A front right link member having one end pivotably attached to the front side of the right side bracket on the head side and the other end pivotally attached to the front side of the right side bracket on the leg side, and the right link on the front side Rear side with one end pivotably attached to the rear side of the right side bracket on the head side and the other end pivotally attached to the rear side of the right side bracket on the leg side so as to be parallel to the member Right link member of
Consisting of,
However, the stay frame assembly,
(2) A substantially box-shaped main body portion that accommodates the head frame and the head / leg coupling mechanism, and the main body portion coupled to the bottom surface of the main body portion so as to leave a gap between the main body portion and the bottom surface of the main body portion. An inner case composed of plate portions formed on the left and right, respectively, with long slots in the front-rear direction communicating with the interior,
Each of the left leg and the right leg of the leg frame extends through the slot and out of the inner case.
The inner case,
(3) A fixing means for fixing at least one of the left side bracket and the right side bracket on the head side to the main body,
When the head frame and the left and right side brackets on the head side are moved in the front-rear direction with respect to the leg frame, the inner case is integrated with the left and right side brackets on the head frame and the head side. Moving in the front-rear direction with respect to the leg frame,
However, fixing means,
(4) A hollow interior and an outer skin having an outline shape of the headrest having an opening communicating with the hollow interior; A pad that is foamed and molded to be integral with the skin,
The peripheral edge portion of the opening of the epidermis inserted into the gap between the bottom surface of the main body portion of the inner case and the plate portion is held in the gap by the pad.
The pad,
Headrest consisting of The head and leg connecting mechanism is
In order to restrict the rearward movement of the left and right side link members on the rear side, a rearward movement restricting means provided on the rear side of at least one of the left and right side brackets on the leg side, and the front side Forward movement restricting means provided on the front side of at least one of the left side and right side brackets on the leg side in order to restrict the forward movement of the left and right side link members of
Further comprising
However, the headrest according to claim 1. The rear movement restriction means is a rear flange formed on the rear side of at least one of the left side bracket and the right side bracket on the leg side;
The forward movement limiting means is a front flange formed on the front side of at least one of the left side bracket and the right side bracket on the leg side.
However, the headrest according to claim 2. The front left and right link members and the rear left and right link members are fixed to the nuts fixed to the left and right brackets on the head side and the left and right brackets on the leg side, respectively. So that the left and right link members on the front side and the left and right link members on the rear side are connected to the left and right brackets on the head side and the left and right sides on the leg side. 2. The headrest according to claim 1, wherein the headrest is pivotally attached to the bracket. The head and leg connecting mechanism is
When the head frame and the left and right side brackets on the head side are moved in the front-rear direction with respect to the leg frame, the moving direction and distance of the left side bracket on the head side, and the right side bracket on the head side A link for connecting the left and right link members on at least one side of the left and right link members on the front side and the left and right link members on the rear side so that the movement direction and distance of Member connecting means,
Further comprising
However, the headrest according to claim 1. The headrest according to claim 1, wherein the headrest is a see-through type headrest, and the inner case has an opening penetrating through a substantially central portion of the main body portion in the front-rear direction.

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