JP4075452B2 - Headrest device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a headrest device for a vehicle seat.
[0002]
[Prior art]
Conventionally, for example, a headrest device disclosed in Japanese Patent Application Laid-Open No. 9-224777 is known as a headrest device provided in a seat for an automobile.
According to this headrest device, the pair of rotating pad portions are attached to the left and right sides of the central pad portion that supports the head so as to be rotatable via the hinge means. Then, the pair of left and right rotating pad portions can be rotated respectively, and the shape of the entire pad portion can be deformed into a curved shape along the head. If the shape of the entire pad part is curved along the head, for example, the soundproofing function at the time of rest on the seat is enhanced, or the support performance of the head at the time of driving on a sharp curve is improved, etc. There are benefits.
[0003]
[Problems to be solved by the invention]
However, the above-described conventional headrest device is troublesome because it takes time and effort for an occupant or the like to rotate the pair of rotating pad portions and deform the entire shape of the pad portions along the head.
The present invention has been made in view of such problems, and an object of the present invention is to provide a headrest device for a vehicle seat that can easily adjust the shape of the pad portion along the shape of the head.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problems, the invention described in each of the claims is configured. According to the headrest device of claim 1, a headrest device for a vehicle seat having a stay held on a seat back and an internal body connected to the stay and installed in a pad, The internal structure includes a center support portion that supports the pad at a substantially central portion, and a side support portion that supports the pad at both side portions, and the side support portion is concave toward the front. When the central support portion is pressed rearward, the side support portion is bent and formed so that the central support portion protrudes forward. The support portion is configured to rotate forward with a connecting portion between the rear portion and the stay formed in a curved shape so as to be concave toward the front of the side support portion . Therefore, when the occupant's head or the like is pressed against the center part of the pad, the pressing force acts on the center support part of the internal body, whereby the side support part is directed forward with the connection point with the stay as a fulcrum Rotate. Then, since both sides of the pad are deformed so as to protrude along both sides of the head of the occupant by the rotation of the side support portion, this makes it possible to easily adjust the shape of the pad along the shape of the head. It becomes possible.
[0005]
According to the headrest device of the second aspect, the stay is configured to have a pair of vertical axis portions that are held by the seat back and a horizontal axis portion that connects the pair of vertical axis portions at the upper end. . The inner body is connected to the stay via a rotation member that is rotatably attached to the horizontal shaft portion, and when the central support portion is pressed rearward, the side support portion Is configured to rotate forward with the connection point with the rotating member as a fulcrum.
Here, the internal body is “connected to the stay via the rotation member” because the internal body is not directly connected to the stay but the rotation member is attached to the stay. This means that the stay and the internal structure are indirectly connected with the rotating member interposed therebetween.
[0006]
With such a configuration, according to the headrest device of the second aspect, when the occupant's head or the like is pressed against the central portion of the pad, the pressing force acts on the central support portion of the internal body, thereby The side support portion rotates toward the front with a connection point with the rotation member as a fulcrum. Then, since both sides of the pad are deformed so as to protrude along both sides of the occupant's head, it becomes possible to easily adjust the shape of the pad along the shape of the head.
Further, according to the headrest device of the second aspect, since the rotating member can be rotated around the horizontal shaft portion of the stay, the internal body connected to the stay via the rotating member is provided. The angle can be adjusted freely. Thereby, for example, the arrangement angle of the pad can be adjusted to a comfortable posture according to the angle of the neck of the occupant.
[0007]
According to the headrest device of the third aspect, the rotation member is formed with a friction applying portion that abuts the longitudinal axis portion of the stay and applies a frictional resistance to the rotation operation in the front-rear direction of the rotation member. The As a result, in the rotation operation of the rotation member, the frictional resistance is given not only by the mounting position on the horizontal axis part but also by the contact point with the vertical axis part. It is possible to appropriately adjust the magnitude of the force required for.
[0008]
According to the headrest device of the present invention, the fitting groove is formed in the rotating member, and the horizontal shaft portion of the stay is fitted into the fitting groove so that the rotating member is formed on the horizontal shaft portion of the stay. Installed. In addition, a guide portion for guiding the horizontal shaft portion of the stay to the fitting groove is formed in an inclined shape on the opening side of the cross section perpendicular to the fitting groove. This has the effect of facilitating the work of fitting the horizontal shaft portion of the stay into the fitting groove of the rotating member.
[0009]
According to the headrest device of the fifth aspect, a bent portion that is easily bent backward is formed in the central support portion of the inner body. Such a “bent portion” can be formed, for example, by making the central support portion of the internal body into a bellows shape.
With such a configuration, according to the headrest device of the fifth aspect, when the occupant's head or the like is pressed against the center portion of the pad, the center support portion of the internal body is directed rearward at the bent portion. Easily bends and deforms. Then, since the shape of the pad is flexibly deformed along the shape of the head, there is an effect of further improving the fit of the occupant to the pad such as the head.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view showing a schematic configuration of a headrest device 1 for a vehicle seat in the present embodiment.
As shown in FIG. 1, the headrest device 1 has a stay 2 formed in a substantially inverted U shape to hold the headrest device 1 on the upper portion of the seat back, and a horizontal shaft portion 2 a of the stay 2. A pivot member 3 that can be mounted, an insert 4 (internal body) connected to the stay 2 via the pivot member 3, and a pad that serves as a cushion body for supporting the head of a seated passenger or the like 5 is the main component.
In the following description, the side on which the occupant's head is arranged with respect to the pad 5, that is, the direction indicated by the arrow F in FIG. 1 will be referred to as the front side, and the direction indicated by the arrow R in FIG. .
[0011]
The stay 2 includes a pair of vertical axis portions 2b that are held substantially vertically at an upper portion of a seat back (not shown), and a horizontal axis portion 2a that connects the pair of vertical axis portions 2b substantially horizontally at the upper end. It is formed in a substantially inverted U-shape. The stay 2 is formed by bending a metal hollow pipe made of iron, stainless steel or the like, but is also formed by bending a solid pipe made of metal or synthetic resin, for example. Also good.
[0012]
Further, the rotating member 3 is integrally formed of a thermoplastic synthetic resin having required elasticity such as polypropylene, and is mounted on the horizontal shaft portion 2a of the stay 2 so as to be rotatable. 3a and a vertical axis mounting portion 3b that is mounted along the vertical axis portion 2b of the stay 2, and is formed in a substantially inverted U-shape. In addition, this rotation member 3 may be formed with materials other than a thermoplastic synthetic resin, for example, may be formed with materials, such as hard rubber which has required elasticity.
[0013]
The insert 4 is formed in a corrugated plate shape from a thermoplastic synthetic resin having a required elasticity such as polypropylene, and is provided in the pad 5 so as to support the central portion of the pad 5. And side support portions 4b that support both left and right side portions of the pad 5. The insert 4 may be formed of a material other than the thermoplastic synthetic resin. For example, when the occupant's head or the like is pressed against the pad 5, the insert 4 can absorb the pressing force and bend appropriately. Or the like.
[0014]
The pad 5 is a cushion material such as urethane foam covered with a skin material such as leather. An opening is provided in the lower part of the pad 5 to form a bag, and the bag-like pad 5 is put on the insert 4 as an internal body from above. Thereby, the insert 4 is installed in the pad 5, the vicinity of the center portion of the pad 5 is supported from the inside by the center support portion 4 a of the insert 4, and both side portions of the pad 5 are supported from the inside by the side support portions 4 b of the insert 4. It has come to be supported.
[0015]
Next, a procedure for assembling the headrest device 1 configured as described above will be described with reference to FIGS. 2 and 3. Here, FIG. 2 is an explanatory view showing a procedure when the rotating member 3 is mounted on the horizontal shaft portion 2 a of the stay 2, and FIG. 3 is a diagram when the insert 4 is connected to the rotating member 3. It is explanatory drawing which shows a procedure. In FIG. 3, a state in which a part of the rotating member 3 is broken is shown for easy understanding of the mounting state of the rotating member 3 with respect to the stay 2.
[0016]
As shown in FIG. 2, when mounting the rotating member 3 on the horizontal shaft portion 2 a of the stay 2, first, a through hole provided so as to penetrate the vertical axis mounting portion 3 b of the rotating member 3 vertically. 7, the pair of longitudinal axis portions 2 b of the stay 2 are respectively inserted from above. The through-hole 7 is formed so that the hole diameter in the front-rear direction gradually increases from the opening 7 a on the upper end side to the opening 7 b on the lower end side, and the rotating member 3 is centered on the horizontal shaft portion 2 a of the stay 2. When it is rotated back and forth, the longitudinal axis 2b of the stay 2 can be moved back and forth inside the through hole 7.
[0017]
As shown in FIG. 3, the horizontal axis mounting portion 3a of the rotating member 3 is provided with a fitting groove 6 having a substantially circular cross section along its longitudinal direction. After inserting the pair of vertical axis portions 2 b of the stay 2 from the upper part of the through hole 7, the horizontal axis portion 2 a of the stay 2 is fitted into the fitting groove 6. The rotating member 3 is mounted along the shape.
Here, looking at the shape of the cross section perpendicular to the longitudinal direction of the fitting groove 6, as shown in FIG. 3, an opening 6a for fitting the horizontal shaft portion 2a is provided in the upper part of the fitting groove 6. The opening 6a is tapered (inclined) so as to spread obliquely upward. The horizontal shaft portion 2a of the stay 2 is guided to the fitting groove 6 while being in sliding contact with the tapered opening 6a, so that the operation of fitting the horizontal shaft portion 2a into the fitting groove 6 can be easily performed. It has become.
[0018]
Further, as shown in FIG. 3, a hinge convex portion 8 is provided on the longitudinal axis mounting portion 3 b of the rotating member 3, and a hinge having a cross-sectional shape corresponding to the hinge convex portion 8 is provided on the rear surface side of the insert 4. A recess 9 is provided. And by inserting the hinge recessed part 9 with respect to this hinge convex part 8, the insert 4 and the rotation member 3 are mutually connected in the state arrange | positioned forward and backward.
[0019]
The characteristic operation and effects of the headrest device 1 according to the present embodiment assembled as described above will be described below with reference to FIGS.
FIG. 4 is a top view of the insert 4 in a state where it is connected to the hinge protrusion 8 of the rotating member 3.
As shown in FIG. 4, the insert 4 is formed in a curved shape so that the side support portions 4 b for supporting both sides of the pad 5 are concave toward the front. The central support portion 4a for supporting is bent and formed in a protruding shape so as to protrude forward. That is, the insert 4 is formed in a wave shape so as to have a substantially W-shape when viewed from above, and when the pressing force from the front acts, the insert 4 itself bends in each part, and the pressing force Can be absorbed quickly.
[0020]
FIG. 5 is a top view of the insert 4 when a pressing force from the front acts on the central support portion 4a.
As shown in FIG. 5, when a pressing force X from the front acts on the center support portion 4 a of the insert 4, the side projection 4 b formed in a curved shape is a hinge projection that is a connection location with the rotating member 3. It rotates so that it protrudes forward with 8 as a fulcrum. Thus, for example, when the occupant's head is pressed against the center of the pad 5, the both sides of the pad 5 supported by the side support portion 4 b are deformed so as to protrude, so the shape of the occupant's head The shape of the pad 5 is automatically adjusted so as to follow.
[0021]
4 and 5, a bellows-like bent portion 10 is formed in the center support portion 4a of the insert 4, and when the pressing force from the front acts, the bent portion 10 faces rearward. It is designed to bend easily. Thereby, for example, when the occupant's head is pressed against the center portion of the pad 5, the center support portion 4 a of the insert 4 is easily bent rearward at the bent portion 10. Then, since the center part of the pad 5 deform | transforms flexibly along the shape of a head, there exists an effect which a feeling of fitting with respect to the pad 5 of a passenger | crew's head further improves. At this time, since the side support portion 4b of the insert 4 is also deformed so as to protrude forward, the shape of the pad 5 is flexibly deformed so as to wrap around the head of the occupant, and further soundproofing, supportability, etc. are provided. Improvement is achieved.
[0022]
6 is a cross-sectional view taken along line AA of the rotating member 3 and the stay 2 shown in FIG. Here, FIG. 6A shows a state when the turning member 3 is turned to the rear end side, and FIG. 6B shows a turning operation of the turning member 3 to the front end side. It shows the state when it was done.
As described above, the through-hole 7 is provided in the vertical mounting portion 3b of the rotating member 3, and the rotating member is in contact with the inner surface of the through-hole 7 and the vertical portion 2b of the stay 2. 3 is rotated forward and backward. And the magnitude | size of the force required for rotation operation to the front and rear of the rotation member 3 is moderately adjusted with the frictional resistance which arises by contact | abutting with this vertical-axis part 2b. Thereby, the arrangement angle of the pad 5 can be arbitrarily adjusted in accordance with the angle of the occupant's neck and the like, and once the arrangement angle of the pad 5 is adjusted, the occupant's head is held. Even if it is hung, the arrangement angle is firmly maintained so that the pad 5 does not wobble. That is, in the present embodiment, the inner surface of the through hole 7 that abuts on the vertical axis portion 2b and generates frictional resistance corresponds to the “friction applying portion” in the present invention.
[0023]
In addition, this invention is not limited to said embodiment, It can change suitably in the range which does not deviate from the summary.
In the above embodiment, the example in which the rotating member 3 is mounted on the horizontal shaft portion 2a of the stay 2 and the insert 4 is connected to the stay 2 via the rotating member 3 is shown. It is not limited to the embodiment.
For example, the insert 4 is directly attached to the stay 2 by providing the hinge protrusion 8 directly to the longitudinal axis 2 b of the stay 2 and fitting the hinge recess 9 to the hinge protrusion 8. May be connected to each other. Even in this case, when the center support portion 4a of the insert 4 is pressed, the side support portion 4b pivots forward with the hinge convex portion 8 as a fulcrum, so that the same effect as the above embodiment is achieved. It is possible.
[0024]
Moreover, although the hinge convex part 8 provided in the rotation member 3 fits into the hinge recessed part 9 provided in the insert 4, and was mutually connected, the example was not limited to such an aspect. . For example, a hinge convex portion 8 may be provided on the insert 4, and the hinge convex portion 8 may be fitted into a hinge concave portion 9 provided on the rotating member 3 so as to be connected to each other.
Further, the rotating member 3 and the insert 4 are not limited to being connected by fitting the hinge convex portion 8 and the hinge concave portion 9 but can be rotated via, for example, a thin synthetic resin hinge member or the like. You may make it connect.
[0025]
Moreover, although the example where the shape of the bending part 10 provided in the center support part 4a of the insert 4 was made into the bellows shape was shown, it is not limited to such an aspect.
For example, the left and right side support portions 4b of the insert 4 may be configured separately by two plate-like members, and the insert 4 may be configured by superimposing the two plate-like members on the central support portion 4a. Good. Then, when the center support portion 4a of the insert 4 is pressed rearward, the two plate-shaped members that are overlaid slide with each other so that the bent portion 10 is easily bent and deformed rearward. May be.
[0026]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a headrest device for a vehicle seat that can easily adjust the shape of the pad along the shape of the head.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a schematic configuration of a headrest device for a vehicle seat.
FIG. 2 is an explanatory diagram showing a procedure when a rotating member is attached to the horizontal shaft portion of the stay.
FIG. 3 is an explanatory diagram showing a procedure when an insert is connected to a rotating member.
FIG. 4 is a top view of the insert in a state where it is connected to a hinge convex portion of a rotating member.
FIG. 5 is a top view of the insert when a pressing force from the front acts on the central support portion.
6 is a cross-sectional view taken along line AA of the rotating member and the stay shown in FIG. 3. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Headrest apparatus 2 Stay 2a Horizontal shaft part 2b Vertical axis part 3 Rotating member 4 Insert (internal body)
4a Center support part 4b Side support part 5 Pad 6 Fitting groove 6a Opening part 7 Through hole 8 Hinge convex part 9 Hinge concave part 10 Bending part

Claims (5)

A headrest device for a vehicle seat having a stay held on a seat back and an internal body connected to the stay and installed in a pad,
The inner body includes a center support portion that supports the pad at a substantially central portion, and a side support portion that supports the pad at both side portions, and the side support portion is recessed forward. When the central support portion is pressed rearward, the side of the central support portion is bent and formed so as to protrude forward. The vehicle has a structure in which the side support portion is turned forward with the connecting portion between the rear portion and the stay formed in a curved shape so as to be concave toward the front of the side support portion . Seat headrest device. The headrest device according to claim 1,
The stay is configured to have a pair of vertical axis portions that are held by the seat back and a horizontal axis portion that connects the pair of vertical axis portions at the upper end,
The internal body is connected to the stay via a rotation member that is rotatably mounted on the horizontal shaft portion, and when the central support portion is pressed rearward, the side support portion is A headrest device for a vehicle seat that is configured to rotate forward with a connection point with a rotating member as a fulcrum. The headrest device according to claim 2,
A headrest device for a vehicle seat, wherein the rotating member is formed with a friction applying portion that abuts on a longitudinal axis portion of the stay and applies a frictional resistance to a rotating operation of the rotating member. The headrest device according to claim 2 or claim 3,
A fitting groove is formed in the rotating member, the horizontal shaft portion of the stay is fitted into the fitting groove, and the rotating member is attached to the horizontal shaft portion of the stay,
A headrest device for a vehicle seat, wherein a guide portion for guiding the horizontal shaft portion of the stay to the fitting groove is formed on an opening side of a cross section perpendicular to the fitting groove. . The headrest device according to any one of claims 1 to 4,
A headrest device for a vehicle seat, wherein a bent portion that is easily bent backward is formed at a central support portion of the inner body.

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