JPH10151979A - Extracting method of headrest holder, headrest holder and holder bracket structure thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a headrest holder extractable safely and easily. SOLUTION: A headrest holder 12 is rotated round as far as the specified angle with a holder bracket under the rotational force exceeding the engaging force of a detent projection 30 to an engaging groove 31 of this holder bracket 11. After an engagement between a hook piece 26 and an engaging end 11a is forcibly released by this rotation, the headrest holder 12 is pulled out, thereby making it extractable from the holder bracket 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for extracting a headrest holder inserted into a holder bracket at the upper end of a seat back, a headrest holder suitable for the method, and a holder bracket structure thereof.

[0002]

2. Description of the Related Art Normally, in a seat of an automobile or the like, a headrest capable of supporting a seated person's head from behind is provided.
It is mounted on the upper part of the seat back via a pair of rod-shaped stays extending downward.

A seat back usually has a so-called headrest holder at its upper end as disclosed in Japanese Utility Model Laid-Open Publication No. 61-163551, and a stay is inserted into this headrest holder and locked. The headrest can be attached to the upper end of the seat back.

As disclosed in Japanese Utility Model Laid-Open Publication No. 61-163551, this type of headrest holder is formed from a synthetic resin material into a substantially T-shaped side surface having a large diameter head portion at the upper end, and the head portion and its head portion are formed. An insertion hole through which the stay can be inserted is formed so as to penetrate through the substantially cylindrical main shaft portion integrally extending downward. The headrest holder has a pair of tapered hook pieces at a position opposed to the lower end of the main shaft portion, and the pair of slits provided at positions opposed to the hook pieces in the direction orthogonal to the main body, such a portion that the main shaft portion has the main shaft. The portion is formed to be elastically deformable inward in the radial direction.

[0005] In such a headrest holder, the main shaft portion is, for example, inserted into a through hole of a holder bracket fixed to the upper end of the seat back frame from above into a radially inward direction along the tapered surface of the hook piece. The lower end is pushed in with elastic deformation. Then, after the penetration of the holder bracket through hole, the headrest holder is attached to the holder bracket, and eventually to the upper end of the seat back, with the hook piece engaging with the engaging end of the holder bracket lower end accompanying the restoration of the lower end of the main shaft portion. It can be installed.

[0006]

However, with the recent trend to recycle industrial materials, it is necessary to disassemble the sheets of automobiles and the like at the time of disposal. There is a demand for a so-called easily dismantleable sheet that facilitates disassembly.

The headrest holder can be pulled out from the holder bracket by pushing the hook piece protruding downward from the holder bracket inward in the radial direction of the main shaft portion. An operator has manually pulled out the headrest holder.

Here, since the seat back is usually formed by covering a seat back frame, a seat pad, and the like with a trim cover, the trim cover and the seat pad on the rear surface of the seat are removed when the headrest holder is removed. And the like must be broken once over the possible range of the work, and the worker must insert his / her hand from the broken point to extract the headrest holder. Then, the operator must pull out the headrest holder upward while crushing the hook piece inward in the radial direction of the main shaft portion by his / her hand, so that the work is complicated and the workability is inevitably reduced.

Further, in such an operation, usually, the position of the hook piece must be checked by groping, and the hook piece must be pushed upward, that is, in the direction of the holder bracket, while crushing the hook piece in a state where it is difficult to visually check. Therefore, the reliability and safety of the work are likely to be inferior.

[0010] In addition, the crushing of the hook by the operator's hand inward in the radial direction of the main shaft portion imposes a heavy burden on the operator. , It is easy to cause a decrease in workability.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a headrest holder extracting method capable of safely and easily extracting a headrest holder, and a headrest holder and a holder bracket structure suitable for the method.

[0012]

In order to achieve this object, in a headrest holder extracting method according to the present invention, a hook piece of a headrest holder is provided so as to protrude at a position facing a main shaft portion, and a detent projection is provided. Attention is paid to the fact that the positioning is performed by the engagement between the and the engagement groove.

According to the present invention, the engagement end of the holder bracket is separately defined into an engagement area and a release area. Then, the headrest holder is rotated by a predetermined angle with respect to the holder bracket under a rotation force exceeding the engagement force of the rotation preventing projection with respect to the engagement groove of the holder bracket, and the position of the hook piece of the headrest holder is adjusted. The headrest holder can be pulled out of the holder bracket by pulling up after moving and aligning the engaging end from the engaging area to the releasing area.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 and 2 (B-1), in a holder bracket structure 10 for a headrest holder according to an embodiment of the present invention, a holder bracket 11 is provided.
However, it has an insertion hole 14 through which the main shaft portion 12a of the headrest holder 12 can be inserted.

In the embodiment of the present invention, the holder bracket 11 is formed, for example, as a pipe body having an inside diameter that allows the main shaft portion 12a of the headrest holder to be freely inserted. The holder bracket 11 is normally fixed to the upper end 18 of the seat back frame of the seat back 16, as shown in FIGS.

As shown in FIGS. 2 (B-1) and 3, the headrest holder 12 has its head 12b attached to the upper end of the seat back 16 with the main shaft 12a inserted into the holder bracket 11. The headrest 22 is mounted on the upper part of the seat back by being exposed and arranged and fixed, and by inserting and locking the stay 20 into the headrest holder.

As shown in FIGS. 1 and 2 (B-1), the headrest holder 12 is formed from a synthetic resin material into a substantially T-shaped side surface having a large-diameter head portion 12b at the upper end of a main shaft portion 12a. , Insertion hole 24 for headrest stay 20
Are provided through the head portion and the main shaft portion (FIG. 2).
(A)).

Then, in addition to FIGS. 1 and 2 (B-1), FIG.
As can be seen from FIG. 3 (C), for example, a pair of tapered hook pieces 26 is attached to the main shaft portion 12a of the headrest holder.
The pair of slits 28 provided integrally at a position opposed to the lower end of the base member, that is, at a position 180 ° away from the hook piece, and provided at a position facing the hook piece in a direction orthogonal to the hook piece, causes the corresponding portion of the main shaft portion to accompany the hook piece. It is formed to be elastically deformable inward in the radial direction.

As shown in FIG. 1, such a headrest holder 12 is inserted into the holder bracket 11 from above. Headrest holder hook piece
26 is tapered, so that when the main shaft portion 12a is pushed into the holder bracket 11, the tapered surface 26 of the hook piece is formed.
Under the elastic deformation of the lower end of the main shaft portion along a, the hook piece is pushed inward in the radial direction of the main shaft portion, and the insertion of the main shaft portion of the headrest holder 12 into the holder bracket is ensured.

The main shaft 12 of the headrest holder
a passes through the holder bracket 11 and the hook piece 26 passes over the lower end 11a of the holder bracket, as shown in FIG. The headrest holder 12 is engaged with the lower end of the holder bracket, and is attached to the holder bracket in a state where the headrest holder 12 is prevented from being detached.

That is, in such a configuration, the lower end 11a of the holder bracket 11 is defined as an engagement end with which the hook 26 of the headrest holder is engaged.

By the way, as shown in FIGS. 1 and 2 (B-1), in such a headrest holder 12, the rotation after the insertion into the holder bracket 11 is usually restricted so that the mounting direction thereof is not changed. A detent protrusion 30 for positioning is provided. The detent protrusion 30 is usually
It protrudes from a predetermined location on the outer peripheral surface of the main shaft portion 12a. An engaging groove 31 into which the rotation preventing projection 30 can be loosely fitted is provided on the holder bracket 11 with an upper end opened.

Here, in the present invention, the headrest holder 12 is attached to the holder bracket 11 in a specific direction by the engagement between the rotation preventing projection 30 and the engagement groove 31, and the hook piece 26 is attached to the main shaft. It is noted that it is provided at a position facing the portion 12a. Therefore, as shown in FIG. 2C, in the holder bracket structure 10 of the present invention, the engagement end 11a of the holder bracket 11 is provided.
Are separated into an engagement area α1 where the hook piece 26 of the headrest holder can be engaged and a release area α2 where the hook piece cannot be engaged, and the hook piece and the engagement are determined by the orientation of the headrest holder 12 with respect to the holder bracket 11. It is possible to switch between engagement and disengagement between the ends.

As can be clearly understood from FIG. 2 (C) and FIGS. 2 (B-1) and 2 (B-2) and FIG. 1, in this embodiment, a substantially elliptical guide body is used. The lower end 32 of the holder bracket 11, that is, below the engagement end 11a, is integrally fixed. The guide body 32 has, for example, a length between the arc portions opposed to each other with an inner diameter equal to or larger than the outer diameter of the pair of hook pieces 26, that is, a length, and a shorter inner diameter equal to or smaller than the diameter of the insertion hole 14 of the holder bracket. Each hand has a circular arc portion in the longitudinal direction as an engagement portion 32-1, that is, an engagement region α1, and a substantially straight portion in the short direction is a release portion 32-2, that is, Each is defined as a release area α2.

In such a configuration, FIG.
As shown in (C), the hook piece 26 is engaged with the engaging portion 32-1 of the guide body.
When the hook pieces are engaged with the engagement ends 11a,
The headrest holder 12 is held with respect to the holder bracket 11. Also, as shown in FIGS. 4 (B-1), (B-2), and (C), when the hook piece 26 is aligned with the release portion 32-2 of the guide body, the hook piece engages with the engagement end 11a. Is canceled.

When the headrest holder 12 is attached to the holder bracket 11, the headrest holder is held in the engagement state between the rotation preventing projection 30 and the engagement groove 31 of the holder bracket. The bracket is held at the position shown in FIG. 2, that is, the engagement position between the hook piece 26 and the engagement end 11a.

By the way, as shown in FIGS. 1 and 2 (B-1), in this type of headrest holder 12, the head 12 is attached to the holder bracket 11.
space between b and the top of the holder bracket
A spacer 34 for securing L1 is usually provided. As the spacer 34, for example, a band-shaped protrusion protruding along the circumferential direction of the main shaft portion 12a can be used. Space above the spacer secured by this spacer 34
L1 is a space where a seat pad, a trim cover, and the like of the seat back 16 are usually arranged, and by securing this space, it is possible to ensure good cushioning at the upper end of the seat back.

Here, as can be seen from FIG. 5 in addition to FIGS. 1 and 2 (B-1), in the present invention, the upper portion of the spacer 34 of the headrest holder 12, that is, the portion defined by the spacer. The space L1 is formed as a non-circular portion by a plurality of, for example, four projections 36 which are equally spaced apart from each other along the axis of the main shaft portion 12a. The non-circular portion (space) L1 can be gripped by a general tool for gripping components, for example, a spanner (also referred to as a wrench) 38 for gripping and tightening the head of a bolt or a nut. It is formed in a shape.

In the headrest holder extracting method of the present invention, first, in the mounting state shown in FIG.
Push the seat pad etc. at the upper end of the seat back 16 downward to expose the non-circular portion L1 of the headrest holder 12,
As shown in FIG. 5, the non-circular portion formed by the plurality of projections 36 is gripped by a tool such as a wrench 38, and the headrest holder is held by the holder bracket by the tool.
For example, it is rotated clockwise with respect to 11 (FIG. 2
(A)).

The turning force applied to the headrest holder 12 at this time is set to a magnitude exceeding the engaging force of the rotation preventing projection 30 with respect to the engaging groove 31, for example, a size capable of breaking the rotation preventing projection. The headrest holder is rotated while breaking the rotation preventing projection. In the present invention, since the headrest holder 12 is rotated by using a tool such as a spanner 38, a turning force large enough to break the detent protrusion 30 can be easily obtained even by a manual operation by an operator. Can be

The headrest holder 12 is moved at a predetermined angle, for example, from the position shown in FIGS. 2A and 2C to the position shown in FIGS. When the hook piece rotates about 90 ° until it is positioned in the release area α2, the hook piece moves along the inner surface of the guide body 32, so that the outer diameter between the pair of hook pieces changes with the change in the inner diameter of the guide body. fluctuate. That is, as shown in FIGS. 4 (B-2) and 4 (C), the hook piece 26 is
12a, the outer diameter of which is equal to or smaller than the inner diameter of the holder bracket 11, that is, the diameter of the insertion hole 14, so that the rotation of the headrest holder by about 90 ° causes the hook piece with respect to the engagement end 10a to rotate. Is released.

4 (B-1) and (B-2) at the rotation position of the headrest holder 12 shown in FIG. 4, that is, the alignment position of the hook piece 26 with respect to the release portion 32-2 of the guide body. )
As can be seen from the figure, since the hook piece is not engaged with the engaging end 11a, if the headless holder is pulled up in this state, the headrest holder can be easily removed from the holder bracket 11.

As described above, according to the headrest holder extracting method of the present invention, the headrest holder
It is only necessary to rotate the holder bracket 11 about 90 ° with a rotation force exceeding the engagement force of the rotation preventing projection 30 with respect to the engagement groove 31 with respect to the engagement groove 31, and then pull up the trim cover, the seat pad, etc. It is possible to remove the headrest holder from the holder bracket without the need for prior breaking or the like.

That is, the headrest holder can be used without breaking or peeling the trim cover, the seat pad, etc. in advance.
Since twelve sampling operations can be performed, the operation is simplified, thereby shortening the operation time.

Then, the operator does not need to put his hand in the seat back, and the
Since it is sufficient to rotate the headrest holder 12 under a specific turning power by operating a general tool such as 38,
Workability and safety are surely improved.

Further, it is sufficient to hold the non-circular portion L1 of the headrest holder 12 by a general tool such as a wrench 38 or the like and rotate it by about 90 ° in the corresponding direction. No work is required, and the work is simplified in this respect as well, thereby improving workability.

The basic structure of the headrest holder 12 is the same as the conventional one, and the mounting by pushing the holder into the holder bracket 11 from above and the positioning of the rotation preventing projection 30 into the engagement groove 31 by loose fitting are not changed. It does not reduce the functionality when attaching the headrest holder to the holder bracket.

According to the headrest holder holder bracket structure 10 of the present invention, the above-described method of extracting the headrest holder can be appropriately performed without modifying the headrest holder itself. In addition to the improvement in workability, the functionality of the headrest holder at the time of attachment can be easily ensured.

Here, in the embodiment of the present invention, a spanner 38 is exemplified as a tool. However, a tool which can grip a component and can rotate while gripping the component is sufficient. The headrest holder 12 is not limited to the wrench, but may be rotated by a tool such as a universal wrench (wrench), pliers, and pliers.

In this embodiment, the main shaft portion
The non-circular portion L1 is formed by providing four protrusions 36 along the axis of 12a at the four positions, but the non-circular portion only needs to have a shape that can be gripped by a tool such as a wrench 38. However, the shape is not limited to this. Further, the present invention is not limited to the formation of the protrusion 36, and the non-circular portion L1 may be formed in advance in a non-circular shape such as a hexagonal shape.

Although the non-circular portion L1 of the headrest holder 12 is gripped by a tool such as a spanner 38 here, the head portion 12b of the headrest holder is illustrated.
However, for example, in the case of a non-circular shape such as an elliptical shape or a rectangular shape as shown, the head portion itself may be gripped with a tool and the headrest holder may be rotated.

Further, the present invention is not limited to tools for gripping parts,
For example, as shown in FIG. 6, a configuration in which the headrest holder 12 is rotated by a general bar-shaped tool 40 may be employed.
In this case, the insertion hole 42 for inserting the rod-shaped tool 40 is
In the space above 34, that is, in a portion corresponding to the non-circular portion L1, a hole is formed in advance so as to be orthogonal to the axis of the main shaft portion 12a.
As such a general bar-shaped tool 40, for example, a Phillips screwdriver can be exemplified.

In such a configuration, it is sufficient to compress the seat pad from above, insert a Phillips screwdriver (bar-shaped tool) 40 into the insertion hole 42, and rotate the headrest holder 12 in the corresponding direction. It is possible to easily secure the work of extracting the headrest holder which is excellent in workability and safety without causing complication.

Here, whether the space L1 above the spacer 34 is formed as a non-circular portion by forming the projection 36,
As one of the shapes in which the insertion hole 42 is formed, the headrest holder 12 capable of using a general tool is illustrated, but the shape is not limited to any one.
The space above the spacer may be formed as a shape provided with both of the insertion holes, that is, as a non-circular portion where the insertion hole is formed. In this way, if the projection 36 and the insertion hole 42 are provided side by side, a tool for gripping parts such as the spanner 38, and
Since any of the bar-shaped tools such as the Phillips screwdriver 40 can be used when rotating the headrest holder 12, the range of tool selection can be further expanded, and workability is further improved.

Further, in one embodiment of the present invention, the shape of the guide body 32 is embodied as an oval, but the shape of the guide body is equal to or greater than the outer diameter between the opposed hook pieces 26. It is sufficient to use a non-circular shape having an inner diameter as its length and an inner diameter equal to or smaller than the diameter of the insertion hole 14 of the holder bracket at its short side. For example, a guide body may be formed.

Further, the guide body 32 needs only to be able to hold the hook piece 26 at the release portion 32-2 thereof at a diameter equal to or smaller than the diameter of the insertion hole 14 of the holder bracket 11, so that the engagement portion 32
The shape is not limited to the continuous closed cross-sectional shape of -1 and the release portion 32-2. For example, as shown in FIG. 7, a pair of plate-like pieces is arranged as a guide body 32 so as to face a position corresponding to an engagement area α1 below the engagement end 11a of the holder bracket, and the open portion is engaged with the engagement portion. 32-1 and the plate-shaped piece portion may be a release portion 32-2.

Further, in this embodiment, the structure in which the headless holder 12 is rotated by the turning force accompanied with the destruction of the rotation preventing projection 30 is exemplified. It is sufficient that the engagement is released with the rotation of the headrest holder, so the invention is not limited to the destruction of the detent projection. For example, the deformation between the detent projection and the engagement between the detent projection and the engagement groove is released. It may be configured.

In this configuration, the engaging groove 31 of the holder bracket is formed by the recess 31a into which the rotation preventing projection 30 is loosely fitted as shown in FIG. 8, and the rotation of the headrest holder 12 after the rotation preventing projection is deformed. Is formed in a shape having a predetermined range of the stepped portion 31b capable of ensuring the above.

Also in such a configuration, for example, a rotation power such that the rotation preventing projection 30 can be disengaged from the recess 31a of the engagement groove with a deformation thereof by a tool such as a wrench 38 holding the non-circular portion L1. Under the headrest holder 12
It is sufficient that the headrest holder is rotated with respect to the holder bracket 11, so that the headrest holder can be easily extracted without complicating the operation.

In the above-described embodiment of the present invention, a configuration in which the headrest holder 12 is rotated clockwise to disengage the hook piece 26 from the engagement end 11a of the holder bracket is illustrated. But on the contrary,
It goes without saying that the headrest holder may be turned counterclockwise.

In the embodiment of the present invention, a pipe is illustrated as the holder bracket 11, but it is sufficient to have an insertion hole 14 through which the main shaft portion 12a of the headrest holder can be inserted. Instead, for example, aligned insertion holes are formed in the upper and lower walls of a sheet metal body bent in a substantially U shape, and the lower peripheral edge of the insertion hole in the lower wall is defined as an engagement end, and the lower wall is The guide body 32 may be arranged and fixed at the lower part.

In such a configuration, a headrest holder extracting method similar to the above-described method can be performed, and the rotation of the headrest holder allows the headrest holder to be removed.
The effect of the holder bracket structure 10 allowing the extraction of the 12 can be similarly secured.

In the above-described embodiment, the holder bracket structure 10 is configured such that the non-circular guide body 32 such as an oval or the like is engaged with the engagement end 11 a of the lower end of the holder bracket 11.
However, the present invention is not limited to this. For example, as shown in FIGS.
In a holder bracket structure 110 according to another embodiment of the present invention, an engagement end of the holder bracket 111 is provided.
111a is formed in a partial substantially skirt shape.

As can be seen from a comparison between the headrest holder 12 shown in FIGS. 1 and 2 according to the above-described embodiment and the headrest holder 12 shown in FIGS. 9 and 10 according to this embodiment, the headrest holder itself can be seen. Are the same, and since this headrest holder has been described in the above-described embodiment, a detailed description thereof will be omitted.

As can be seen from FIGS. 9 and 10C, in this holder bracket structure 110, the direct deformation of the engaging end 111a of the holder bracket causes
The engaging end is separated into an engaging portion 111a-1 (engaging region α1) where the hook 26 of the headrest holder can be engaged and a releasing portion 111a-2 (releasing region α2) where the hook cannot be engaged. Stipulated.

In the holder bracket structure 110, the engaging portion 111a-1 is inserted into the through hole 14 of the holder bracket 111.
And the release portion 111a-2 is formed in a substantially skirt shape that is expanded to be equal to or more than the outer diameter of the pair of hook pieces 26 so that engagement with the hook pieces does not occur.

In this holder bracket structure 110, as shown in FIG.
The rotation preventing protrusion 30 is inserted into the holder bracket 111 with a loose fit into the engagement groove 31. Then, in the direction of the headrest holder 12 in which the rotation preventing projection 30 is loosely fitted in the engagement groove 31, as shown in FIG.
Since 26 is engaged with the engaging portion 111a-1 at the engaging end of the holder bracket, the headrest holder is mounted in a state where detachment from the holder bracket 111 is prevented.

As shown in FIGS. 9 and 10, also in this headrest holder 12, a non-circular portion is formed above the spacer by forming the spacers 34 and the projections 36 on the peripheral surface of the main shaft portion 12a. For example, a spanner
Needless to say, the rotation of the headrest holder by gripping the non-circular portion with a tool such as 38 is also possible in this configuration.

From the state shown in FIG. 10, the headrest holder 12 is rotated clockwise as shown by an arrow in FIG. When the rotation angle becomes about 90 °, FIG.
As shown in (B-2) and (C), the hook pieces 26 of the headrest holder are aligned with the release region α2 of the engagement end, that is, the release portion 111a-2 of the substantially skirt-shaped engagement end.

Since the inner diameter of the release portion 111a-2 at the engagement end is set to be equal to or larger than the outer diameter of the pair of hook pieces 26 as described above, in this state, that is, in the state of FIG. When the headrest holder 12 is pulled up, the hook pieces move along the inner surface of the skirt-shaped, inwardly inclined engaging end release portion. And a release portion of the engagement end.
When the hook piece 26 moves along the inner surface of 111a-2, the hook piece narrows its outer diameter under the elastic deformation of the lower end of the main shaft portion 12a inward in the radial direction. The headrest holder 12 can be removed from the holder bracket 111.

That is, even in such a holder bracket structure 110, the above-described method of extracting the headrest holder can be appropriately performed, and the extracting operation of the headrest holder 12 excellent in safety and workability can be easily performed.

In this embodiment, an example is shown in which projections 36 are provided at a plurality of positions above the spacer 34, and the headrest holder 12 is rotated by gripping the non-circular portion L1 with a tool such as a wrench 38. However, it goes without saying that an insertion hole may be formed in the portion, and the headrest holder may be rotated by a rod-shaped tool such as a Phillips screwdriver 40.

In this case, the rotation is accompanied by the destruction of the rotation preventing projection 30, but the rotation is not limited to the destruction. The headrest holder 12 may be rotated under the deformation of the rotation preventing projection.

By the way, each of the embodiments of the holder bracket structure described above is embodied as a configuration in which the engagement end of the holder bracket is separated and defined into an engagement area α1 and a release area α2. But,
Any configuration that allows the headrest holder to be pulled out while being rotated and raised with respect to the holder bracket is sufficient, and is not limited to a configuration in which the engagement end of the holder bracket is separately defined into an engagement region and a release region.

For example, as shown in FIG. 12, a holder bracket structure 21 according to still another embodiment of the present invention is provided.
0, the holder bracket 211 is
Without changing the shape of the lower end to be formed, for example, it is formed in a cross-sectional shape of a holder bracket serving as a pipe body.

Note that the basic structure of the headrest holder 12 does not change in this configuration, and a detailed description thereof will be omitted.

Here, as can be seen from FIG. 13 in addition to FIG. 12, in the holder bracket structure 210 of the present invention, the engaging groove 231 of the holder bracket in which the rotation preventing projection 30 of the headrest holder 12 can be loosely fitted. However, for example, it is formed by a combination of a concave portion 231a in which the rotation preventing protrusion can be fitted, and a guide surface 231b formed symmetrically on the pair of side sides by being inclined upward.

The holder bracket 211 having the engaging groove 231 having such a shape is attached to the headrest holder 12.
Moves (rotates) in a corresponding direction, for example, leftward in FIG. 13 under a turning force exceeding the engaging force of the engaging groove with the concave portion 231a.
Then, the anti-rotation protrusion tries to move upward along the guide surface while deforming under the rotational force, and thereby, the engaging point x, y between the headrest holder and the holder bracket is directed upward to the rotational force P. A component W occurs.

Here, the engaging end 211a of the holder bracket
The upward component force W at the engagement point y between the headrest holder and the hook piece 26 is generated starting from substantially the center of the thickness of the main shaft portion 12a of the headrest holder.
There is a distance deviation from y. Then, an inward component force W ′ due to a rotational moment generated from the distance between the upward component force W and the drag force N ′ is applied to the hook piece 26 as a force to elastically deform the lower end of the main shaft portion 12a inward in the radial direction. Is done.

That is, the upward movement of the headrest holder 12 along the guide surface 231b of the engagement groove causes the hook piece 26
Is generated between the hook piece and the engaging end 211a, so that the engagement between the hook piece and the engaging end is released by the rotation of the headrest holder with respect to the holder bracket 211. When the headrest holder 12 is pulled out in this disengaged state, the holder bracket 21
It becomes possible to remove the headrest holder from 1.

That is, even in such a holder bracket structure 210, the above-described method of extracting the headrest holder, which enables the headrest holder to be extracted from the holder bracket 211 by rotating and pulling up the headrest holder 12, can be appropriately performed. In addition, the headrest holder with excellent workability can be easily extracted.

Also in this configuration, it is sufficient that the headrest holder 12 is rotated by a general tool, so that a smooth and easy rotation operation of the headrest holder can be easily secured. And since a tool is used, the burden on the operator is sufficiently reduced.

Further, in this holder bracket structure 210, it is sufficient to provide a guide surface 231b inclined upward on the opposite side of the engagement groove 231. Therefore, the structure of the holder bracket 211 can be further prevented from becoming complicated. .

Here, as shown in FIG. 13, in such a configuration, the upper surface 26b of the hook 26 of the headrest holder is preferably formed in a tapered shape inclined downward at the outer end. According to such a configuration, the inward movement of the hook piece 26 due to the generation of the inward component force W 'can be smoothly obtained along the tapered upper surface 26b. Makes it easier to disengage the hook piece from the engagement end 211a.

Here, in this embodiment, a configuration in which the guide surfaces 231b are provided symmetrically on both of the pair of side sides of the engagement groove 231 is exemplified, but the present invention is not limited to this. When the rotation direction is defined in any one direction, the guide surface may be provided on only one of the side sides. Also, the concave portion 231a and the guide surface 23
Not limited to the combination with 1b, the engagement groove 231 may be formed in a shape in which the concave portion 231a is omitted, that is, a shape in which the guide surfaces on both sides are continuously combined.

Then, as in this embodiment, the engagement groove
If symmetrical guide surfaces 231b are provided on both of the pair of side edges of the 231
Since the direction of rotation is not limited, simplification of the operation can be easily ensured also from this point.

Although the present invention is most suitable for a headrest holder to be inserted into an automobile seat and a method for extracting the headrest holder, a seat using the headrest holder can be used for an automobile. The present invention is not limited to seats, and may be applied to headrest holders for various seats such as trains, airplanes, and ships.

The embodiments of the present invention described above are for explaining the present invention, and do not limit the present invention in any way. Modifications, alterations, and the like made within the technical scope of the present invention are also possible. It goes without saying that all are included in the present invention.

[0080]

As described above, according to the method for extracting the headrest holder according to the present invention, the headrest holder is moved relative to the holder bracket under a turning force exceeding the engaging force of the rotation preventing projection with respect to the engaging groove. If the headrest holder is lifted after being rotated by a predetermined angle, the headrest holder can be removed from the holder bracket. That is, the headrest holder can be extracted without previously breaking or peeling off the trim cover, the seat pad, and the like, so that the operation is simplified, thereby shortening the operation time.

The operator only needs to rotate the headrest holder with a specific turning force by operating the tool on the upper part of the seatback without putting his hand in the seatback, so that workability and workability can be improved. Safety is definitely improved.

Further, since it is sufficient to rotate the headrest holder with a general tool for gripping parts, no special equipment is required. In this respect, workability is improved by simplifying the work.

According to the headrest holder of the present invention, the operation of rotating the headrest holder with a general tool can be easily performed.
Workability is improved. Furthermore, if the non-circular portion and the insertion hole are provided at predetermined positions of the headrest holder, the tools that can be used for rotating and pulling out the headrest holder are expanded, so that the workability when removing the headrest holder is further structured. .

Further, according to the holder bracket structure of the headrest holder of the present invention, the above-mentioned method of extracting the headrest holder can be appropriately performed without any modification of the headrest holder itself, and thus the work at the time of extracting the headrest holder can be performed. In addition to the improved performance, it is easy to ensure the functionality of the headrest holder during installation.

In the configuration in which the guide surface inclined upward is provided on the side of the engaging groove of the holder bracket, it is sufficient to change the shape of the engaging groove, so that the structure of the holder bracket can be further simplified. Further, if symmetrical guide surfaces are provided on both of the pair of side edges of the engagement groove, the rotation direction of the headrest holder during the extraction operation is not limited, and from this point, the operation can be easily simplified. Peel off.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a headrest holder and a holder bracket structure according to an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment shown in FIG. 1 in an engaged state, a sectional view taken along line AA of the plan view, a sectional view taken along line BB of the plan view, and a lower surface. FIG.

FIG. 3 is a schematic perspective view of a seat back provided with a headrest holder.

4 is a plan view in the disengaged state, a cross-sectional view taken along line CC of the plan view, a cross-sectional view taken along line DD of the plan view, and It is a bottom view.

FIG. 5 is a sectional view taken along line EE of FIG. 1;

FIG. 6 shows a modification of the embodiment shown in FIG. 1,
It is sectional drawing similar to.

FIG. 7 shows another modification of the embodiment shown in FIG.
It is a schematic perspective view of a headrest holder structure.

FIG. 8 is a schematic perspective view of a headrest holder structure, showing still another modification of the embodiment shown in FIG. 1;

FIG. 9 is a schematic perspective view of a headrest holder and a holder bracket structure according to another embodiment of the present invention.

10 is a plan view, a sectional view, and a bottom view similar to FIG. 2 in an engaged state in the embodiment shown in FIG. 9;

FIG. 11 is a plan view, a sectional view, and a bottom view similar to FIG. 4 in the disengaged state in the embodiment shown in FIG. 9;

FIG. 12 is a schematic perspective view of a headrest holder and a holder bracket structure according to still another embodiment of the present invention.

FIG. 13 is a partially cutaway front view of the holder bracket structure in the embodiment shown in FIG. 12;

[Explanation of symbols]

 10, 110, 210 Holder bracket structure 11, 111, 211 Holder bracket 12 Heldless holder 12a Main shaft 26 Hook piece 30 Detent projection 31, 231 Engagement groove 32 Guide body 34 Spacer 36 Projection 42 Insertion hole

Claims (14)

[Claims] 1. A headrest is formed with a pair of hook pieces divided through a slit at a position opposite to a lower end of a substantially cylindrical main shaft portion into which a stay of a headrest is inserted, and is formed into a corresponding engagement groove. The main shaft portion is attached to the holder bracket by the insertion of the main shaft portion into the insertion hole with the loose fit of the rotation preventing projection and the engagement of the hook portion with the corresponding engagement end, and the hook portion radially inward of the main shaft portion. In the headrest holder that can be extracted from the holder bracket by releasing the hook piece from the engagement end under the pushing of the holder bracket, with the rotation force exceeding the engagement force of the detent projection with the engagement groove of the holder bracket, After rotating the headrest holder by a predetermined angle with respect to the holder bracket and forcibly releasing the engagement between the hook piece and the engagement end by this rotation, Sampling method of the headrest holder withdrawn from the holder bracket by pulling the headrest holder. 2. A headrest is formed with a pair of hook pieces divided through a slit at a position opposed to a lower end of a substantially cylindrical main shaft portion through which a stay of the headrest is inserted, and is formed into a corresponding engagement groove. The main shaft portion is attached to the holder bracket by the insertion of the main shaft portion into the insertion hole with the loose fit of the rotation preventing projection and the engagement of the hook portion with the corresponding engagement end, and the hook portion radially inward of the main shaft portion. The engagement end of the holder bracket is separated into an engagement area and a release area in the headrest holder that can be removed from the holder bracket by releasing the engagement of the hook piece with the engagement end under the pushing of the holder bracket. The headrest holder is rotated by a predetermined angle with respect to the holder bracket with a rotation force exceeding the engagement force of the rotation preventing projection with respect to the engagement groove of Moving the position of the hooks of the headrest holder from the engagement region of the engaging end of the holder bracket to the release area, after aligning, extraction method of the headrest holder withdrawn from the holder bracket by pulling the headrest holder. 3. A headrest is formed with a pair of hook pieces divided through a slit at a position facing a lower end of a substantially cylindrical main shaft portion through which a stay of the headrest is inserted, and is formed into a corresponding engagement groove. The main shaft portion is attached to the holder bracket by the insertion of the main shaft portion into the insertion hole with the loose fit of the rotation preventing projection and the engagement of the hook portion with the corresponding engagement end, and the hook portion radially inward of the main shaft portion. In the headrest holder that can be removed from the holder bracket by disengaging the hook piece from the engagement end under the pushing, the headrest holder is rotated in a predetermined direction with respect to the holder bracket to engage the detent projection. The headrest holder is moved along the corresponding guide surface of the mating groove, and the In addition to generating an upward component force on the hook, the hook piece is subjected to an inward component force due to a rotational moment generated from a distance between the upward component force and a downward reaction force generated against the upward component force. The headrest holder removes the headrest holder from the holder bracket by lifting the hook piece from the engaging end of the holder bracket by applying the moving force of the main shaft part inward in the radial direction of the main shaft part. How to extract. 4. A non-circular upper part of a spacer protruding from an outer periphery of a main shaft part of a headrest holder so that a space of a specific height can be secured between an upper end of the holder bracket and a head part of an upper end of the headrest holder. The method for extracting a headrest holder according to any one of claims 1 to 3, wherein the headrest holder is turned up by a predetermined tool capable of gripping the non-circular portion. 5. An upper portion of a spacer protruding from an outer periphery of a main shaft portion of the headrest holder so as to secure a space of a specific height between an upper end of the holder bracket and a head portion of an upper end of the headrest holder. 4. The method for extracting a headrest holder according to claim 1, wherein an insertion hole in the orthogonal direction is formed, and the headrest holder is pulled up by rotating the headrest holder with a predetermined rod-shaped tool that can be inserted into the insertion hole. 6. A headrest is formed with a pair of hook pieces divided through a slit at a position facing the lower end of a substantially cylindrical main shaft portion through which a stay of the headrest is inserted, and is formed into a corresponding engagement groove. The main shaft part is inserted into the insertion hole with loose fit of the rotation preventing projection, and is attached to the holder bracket by engagement of the hook piece with the corresponding engagement end, and the head part at the upper end of the holder bracket and the upper end of the headrest holder A headrest holder having a spacer capable of securing a space of a specific height between the main shaft and the headrest holder, wherein an upper portion of the spacer is formed in a non-circular shape that can be gripped by a predetermined tool. Headrest holder. 7. A headrest is formed with a hook piece divided through a plurality of slits at a position facing a lower end of a substantially cylindrical main shaft portion through which a stay of the headrest is inserted, and is formed into a corresponding engagement groove. The main shaft part is inserted into the insertion hole with loose fit of the rotation preventing projection, and is attached to the holder bracket by engagement of the hook piece with the corresponding engagement end, and the head part at the upper end of the holder bracket and the upper end of the headrest holder A headrest holder having a spacer capable of securing a space of a specific height between the headrest holder and the outer periphery of the main shaft portion, wherein an insertion hole through which a predetermined rod-shaped tool can be inserted and engaged is drilled above the spacer. Headrest holder. 8. A headrest is formed at a position facing a lower end of a substantially cylindrical main shaft portion into which a stay of the headrest is inserted, and has a pair of hook pieces divided through a slit, and is formed into a corresponding engagement groove. The main shaft part is inserted into the insertion hole with loose fit of the rotation preventing projection, and is attached to the holder bracket by engagement of the hook piece with the corresponding engagement end, and the head part at the upper end of the holder bracket and the upper end of the headrest holder In a headrest holder having a spacer capable of securing a space of a specific height between the main shaft portion and the outer periphery of the main shaft portion, the upper portion of the spacer is formed into a non-circular shape that can be gripped by a predetermined tool. A headrest holder characterized in that an insertion hole through which a predetermined rod-shaped tool can be inserted and engaged is formed. 9. An engagement hole in which a substantially cylindrical main shaft portion of a headrest holder into which a stay of a headrest is inserted is insertably inserted, and a rotation preventing projection projecting from an outer peripheral surface of the main shaft portion is loosely fitted. The main shaft portion is inserted into the insertion hole with loose fit of the rotation preventing projection into the engagement groove, and the lower end of the main shaft portion divided by the slit with respect to the engagement end defined at the lower end. In a holder bracket capable of holding a headrest holder in a specific direction by engagement of a pair of hook pieces, an engagement portion capable of ensuring engagement of the hook piece with an engagement end, and an outer portion between the pair of hook pieces. A guide body having a release portion capable of holding a diameter equal to or less than the inner diameter of the engagement end is provided integrally below the engagement end of the holder bracket, and the guide body defines an engagement area of the engagement end and a release area. And were separately prescribed Holder bracket structure of the headrest holder and said and. 10. The guide body has an inner diameter equal to or greater than the outer diameter between the opposed hook pieces of the headrest holder in its longitudinal direction, and an inner diameter less than or equal to the inner diameter of the insertion hole of the holder bracket in its short side. The holder bracket structure for a headrest holder according to claim 9, wherein the holder bracket structure is formed in a substantially elliptical shape. 11. An engagement hole in which a substantially cylindrical main shaft portion of a headrest holder into which a stay of a headrest is inserted is insertable, and a detent protrusion protruding from an outer peripheral surface of the main shaft portion is loosely fitted. The main shaft portion is inserted into the insertion hole with loose fit of the rotation preventing projection into the engagement groove, and the lower end of the main shaft portion divided by the slit with respect to the engagement end defined at the lower end. In a holder bracket capable of holding a headrest holder in a specific direction by engagement of a pair of hook pieces, an engagement end of the holder bracket is provided between an engagement portion capable of engaging the hook piece and a pair of hook pieces. It is formed in a continuous shape with a substantially skirt-shaped release portion that is expanded to be equal to or more than the outer diameter,
The holder bracket structure of the headrest holder, wherein the engagement portion is defined as an engagement region, and the substantially skirt-shaped release portion is defined as a release region. 12. An engagement hole in which a substantially cylindrical main shaft portion of a headrest holder into which a stay of a headrest is inserted is insertable, and a detent projection protruding from an outer peripheral surface of the main shaft portion is loosely fitted. The main shaft portion is inserted into the insertion hole with loose fit of the rotation preventing projection into the engagement groove, and the lower end of the main shaft portion divided by the slit with respect to the engagement end defined at the lower end. In a holder bracket capable of holding the headrest holder in a specific direction by engagement of a pair of hook pieces, the engagement groove of the holder bracket may be configured such that the upwardly inclined guide surface forms a pair of opposing side sides. A holder bracket structure for a headrest holder, wherein the holder bracket structure is formed in at least one of the holder brackets. 13. The headrest holder according to claim 1, wherein the outer end of the upper surface of the hook piece is tapered downward and inclined.
2. The holder bracket structure of the headrest holder according to 2. 14. The holder bracket structure for a headrest holder according to claim 12, wherein the guide surfaces of the engagement grooves of the holder bracket are formed symmetrically on a pair of side sides.