JP2020200548A - Headrest with size adjustment function suitable for bicycle helmet - Google Patents

Abstract

To provide a headrest that can be adjusted in size and provides a comfortable fit in a bicycle helmet.SOLUTION: A headrest 100 includes: a headrest body 110 made of a flexible material that contacts a connection portion with a helmet body and an occipital region of a user, and formed as a thin frame with a symmetrical shape including a right frame 114R, a left frame 114L, and a central frame 114C connecting the right frame 114R and the left frame 114L; and adjustment means for adjusting a length between left and right ends of the headrest body 110. The adjustment means adjusts the length between the left and right ends of the headrest body 110 by deforming the central frame 114C of the headrest body 110 so as to bring them closer to each other, and includes a keeping portion for keeping a shape of the central frame 114C deformed so as to bring top and bottom close to each other.SELECTED DRAWING: Figure 2

Description

The present invention relates to a bicycle helmet that can provide a comfortable fit for a user wearing a bicycle helmet, and more particularly to a headrest having a size adjustment (adjuster) function.

Helmets that protect the head are used in bicycle races to prepare for falls while the bicycle is running. Such bicycle helmets (synonymous with cycling helmets) are different from helmets commonly used in car races or motorcycles, and bicycle helmets usually have at least the head of the user (synonymous with the wearer). Many are formed to partially cover and protect the user's head from collisions at both the top and sides of the cranial portion.

In such a bicycle helmet (hereinafter simply referred to as a helmet), there is a size adjuster for matching the shape and / or size of the wearer's head, and the helmet is worn by manual operation. The size of each part of the helmet is adjusted to the shape and / or size of the person's head.
Specific examples of adjusting the size of each part of the helmet in this way include the peripheral length (head circumference) of the helmet body and the length (position) of the headrest that abuts on the back of the head to ensure stability when worn. Japanese Unexamined Patent Publication No. 2015-021217 (Patent Document 1) discloses a size adjuster for a headrest.

The size adjuster disclosed in Patent Document 1 is a size adjuster for a cycling helmet of a type that can be fixedly connected to the inside of the cycling helmet, and the size adjuster is along the lower periphery of the helmet. The annular structure is switchable between a minimum diameter form and a plurality of increased diameter forms so that the helmet can be worn by users of different sizes, and the size adjuster has an annular structure. In a size adjuster provided with a manual switching device of the form of the annular structure, the size adjuster is directed to the annular structure in such a way that it can be freely directed along at least one axis. It has a connected user headrest element.

In Patent Document 1 (particularly FIGS. 1, 2, and 8), cylindrical pins of the headrest element (13) divided into left and right are provided on the side arms (14) at the left and right ends of the central portion (15). The left and right lengths of the headrest elements (13) divided into left and right by being connected to the spherical support (16) and being separated from each other by the pair of left and right headrest elements (13) approaching or separating from each other. It will be adjusted.

Japanese Unexamined Patent Publication No. 2015-021217

However, in the size adjuster disclosed in Patent Document 1, the headrest element (13) that abuts on the back of the head of the wearer to ensure stability during wearing is divided into left and right, and the back of the head abuts on the central portion. Not equipped. Therefore, in the headrest element (13) in the size adjuster disclosed in Patent Document 1, the headrest contacts the occipital region only in a narrow area because there is no portion that abuts on the central portion in the left-right direction of the occipital region. Therefore, it may not be possible to secure sufficient stability. Due to this possibility, there is a problem that a comfortable wearing feeling cannot be obtained for a user who wears a bicycle helmet.

The present invention has been developed in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a bicycle helmet that can provide a comfortable wearing feeling to a user who wears a bicycle helmet. It is to provide a headrest with a size adjustment function to realize it.

In order to achieve the above object, the headrest of the bicycle helmet according to the present invention takes the following technical measures.
That is, the headrest of the bicycle helmet according to the present invention is a headrest having a size adjustment function suitable for the bicycle helmet, the headrest abuts on the back head of the user in the bicycle helmet, and the bicycle helmet The headrest includes a helmet body that protects the user's helmet body, and the headrest is composed of a connection portion with the bicycle helmet body and one member that abuts on the back of the user's head and is longer in the left-right direction than in the up-down direction. It includes a main body and an adjusting means for adjusting the lengths of the left and right ends of the headrest main body.

Preferably, the headrest body is a deformable frame, and the adjusting means adjusts the lengths of the left and right ends of the headrest body by deforming the central portion of the headrest body so as to bring them closer to each other. However, the adjusting means can be configured to include a holding portion that holds the shape of the central portion that is deformed so as to bring the top and bottom closer to each other.
More preferably, the headrest body is a thin frame made of a flexible material, and the adjusting means is bent so as to bring the central portion of the headrest body close to each other. The lengths of the left and right ends of the headrest body can be adjusted, and the adjusting means can be configured to include a holding portion that holds the shape of the central portion that is bent so as to approach the top and bottom.

More preferably, the headrest body is made of a flexible material and is a thin frame body having a symmetrical shape, and connects the right frame body, the left frame body, the right frame body, and the left frame body. The adjusting means is formed by the central frame body, and the right frame body and the left frame body are brought close to each other by bending the central frame body so as to bring them close to each other, and the left and right ends of the headrest body. The adjusting means can be configured to include a holding portion that holds the shape of the central frame body that is bent so as to approach the top and bottom.

According to the present invention, it is possible to provide a headrest having a size adjusting function for realizing a bicycle helmet that can provide a comfortable wearing feeling for a user who wears the bicycle helmet.

(A) Front view, (B) Overall perspective view of the bicycle helmet 10 including the headrest 100 having the size adjustment function according to the embodiment of the present invention, (B) Headrest from FIG. 1 (B). It is a perspective view which extracted only 100. It is an exploded perspective view of the headrest 100 shown in FIG. 1C. FIG. 2 is a perspective view (A) in which the headrest main body 110 and the holding portion 120 shown in FIG. 2 are assembled, and is an enlarged plan view of arrow 3B in FIG. 3 (A). It is a partial plan view of the headrest 100 for explaining the size adjustment function.

Hereinafter, a bicycle helmet 10 including the headrest 100 having a size adjusting function and the headrest 100 according to the embodiment of the present invention (hereinafter, may be simply referred to as a helmet 10) will be described in detail with reference to the drawings. Here, there are various structures of a bicycle helmet, and the present invention is not limited to a specific structure, and any bicycle helmet including a headrest 100 having a feature (size adjustment function) described later. For example, it does not matter what the structure of the bicycle helmet is, what kind of material constitutes the bicycle helmet, how to join the materials, and the like. Therefore, the structure of the bicycle helmet shown below is merely an example.

As a size adjustment function, the helmet 10 adjusts the peripheral length (head circumference) of the helmet 10 body in addition to the size adjustment function of the headrest 100 in the left-right direction, which will be described in detail later. As an example of such a mechanism for adjusting the peripheral length (head circumference) of the helmet 10 main body, a wire (not shown) and a dial 140 in which the user adjusts the length of the wire and holds the adjusted wire length. It can be realized by the wire holding mechanism 130 (see FIGS. 1 and 2 described later). However, the size adjustment function of the peripheral length (head circumference) of the main body of the helmet 10 is not directly related to the present invention and will not be described in detail. Further, the helmet 10 may be provided with yet another adjustment function.

A front view of the bicycle helmet 10 including the headrest 100 having a size adjustment function is shown in FIG. 1 (A), and an overall perspective view of the bicycle helmet 10 looking up from below is shown in FIG. 1 (B) and FIG. 1 (B). A perspective view of only the headrest 100 extracted from the headrest 100 is shown in FIG. 1 (C).
As shown in these figures, the bicycle helmet 10 includes a helmet body 20 that protects the user's skull portion and a headrest 100 that has a size adjusting function. As described above, the bicycle helmet 10 may be configured to include the helmet body 20 and the headrest 100, and has a function of adjusting the size of the peripheral length (head circumference) of the helmet 10 body as described above. It doesn't matter.

Here, the up-down direction, the left-right direction, and the front-back direction in the following description are the directions seen by the user wearing the helmet 10, and are as shown in FIG. Therefore, in the drawing showing the appearance of the helmet 10 viewed from the rear direction to the front direction, the entire dial 140 is shown, the right side of the drawing is the right direction, and the left side of the drawing is the left direction. The dial 140 is hidden in the drawing showing the inner surface of the helmet 10 as viewed from the front direction to the rear direction, and the right side of the drawing is leftward and the left side of the drawing is rightward. For example, the front view of the helmet 10 shown in FIG. 1 (A) and the partial plan view of the headrest main body 110 shown in FIG. 4 are views showing the inner surface of the helmet 10 viewed from the front direction to the rear direction (the dial 140 is). A hidden perspective view of the headrest 100 shown in FIG. 2 and a perspective view of the headrest body 110 and the holding portion 120 shown in FIG. 3A are the helmet 10 viewed from the rear. It is a figure which shows the appearance seen in the front direction (the figure which shows the whole dial 140).

Next, an exploded perspective view of the headrest 100 shown in FIG. 2, a perspective view in which the headrest main body 110 and the holding portion 120 shown in FIG. 3A are assembled, and FIG. 3A shown in FIG. 3B. The structure of the headrest 100 having the size adjustment function, which is a feature of the helmet 10, will be described with reference to the enlarged plan view of the arrow 3B. The size adjustment function of the headrest 100 will be described with reference to FIG. 4 after explaining the structure of the headrest 100. Here, the headrest 100 has been conventionally used in that the bicycle helmet 10 provides a comfortable wearing feeling for the user who wears the bicycle helmet 10 by contacting the back of the head of the user to ensure stability when worn. The headrest according to the present invention is the same as the headrest of the above, except that the headrest according to the present invention sufficiently and surely contacts the back of the head of the user to ensure sufficient stability when worn.

First, the technical structural features of the headrest 100 will be roughly described below.
The headrest 100 includes a headrest main body 110 composed of a connection portion with a helmet main body 20 included in the bicycle helmet 10, a member that abuts on the back of the head of the user and is longer in the horizontal direction than in the vertical direction, and a headrest main body. It is characterized by including adjusting means (center frame 114C and holding portion 120, which will be described later) for adjusting the lengths of the left and right ends of 110. Here, although not limited to, in the headrest 100 according to the present embodiment, the connection portion with the helmet main body 20 is integrally extended from the headrest main body 110 (the connection portion 112A and the connection to be described later). Part 112B).

Further, although not limited, the headrest main body 110 is formed of a deformable frame body, and as an adjusting means, the headrest main body 110 is deformed so as to approach the top and bottom of the central portion (central frame body 114C described later). It is also possible to adjust the lengths of the left and right ends of the headrest body 110 by allowing the headrest body 110 to be adjusted. The adjusting means is configured to include holding portions (central frame 114C and holding portion 120 described later) that hold the shape of the central portion (central frame 114C described later) deformed so as to bring the top and bottom closer to each other. You can also do it.

Further, but not limited to, the headrest body 110 is a thin frame body (right frame body 114R, which will be described later, a central frame) made of a flexible material (for example, a plastic resin having a certain strength). The body 114C and the left frame 114L) are formed, and as an adjusting means, the upper and lower sides (upper side 114CU and lower side 114CD of the central frame 114C described later) of the central portion of the headrest body (central frame 114C described later) are brought close to each other. It is also possible to adjust the length of the left and right ends of the headrest main body 110 (the distance between the end of the right frame 114R and the end of the left frame 114L, which will be described later) by bending the headrest body 110. Then, this adjusting means is provided with a holding portion (central frame body 114C and holding portion 120 described later) that holds the shape of the central portion (central frame body 114C described later) bent so as to bring the top and bottom closer to each other. It can also be configured.

Further, but not limited to, the headrest main body 110 is made of a flexible material (for example, a plastic resin having a certain degree of strength), and is a thin frame having a symmetrical shape and is a right frame. The body 114R, the left frame 114L, and the central frame 114C connecting the right frame 114R and the left frame 114L are integrally formed (for example, resin molding), and the upper and lower parts of the central frame 114C are used as adjusting means. By bending (the upper side 114CU and the lower side 114CD of the central frame 114C described later) so as to approach each other, the right frame 114R and the left frame 114L are brought close to each other to adjust the lengths of the left and right ends of the headrest body. It can also be configured to. Then, this adjusting means is a holding portion that holds the shape of the central frame body 114C that is bent so as to approach the upper and lower sides (upper engaging claws 114UA and upper engaging claws 114UB of the central frame 114C, which will be described later, and a central frame. The lower engaging claw 114DA and the lower engaging claw 114DB of the body 114C, the upper engaging groove 122UA and the upper engaging groove 122UB of the holding portion 120, the lower engaging groove 122DA and the lower engaging groove 122DB of the holding portion 120. ) Can also be provided.

The technical structural features of the headrest 100, which have been roughly described, will be described in detail below.
As shown in FIGS. 2 and 3, the headrest 100 included in the helmet 10 is composed of a headrest main body 110, a holding portion 120, a wire holding mechanism 130, and a dial 140, and the wire holding mechanism 130 and the dial 140 are not shown. Adjust the circumference (head circumference) of the helmet 10 body together with the wire. In the following, the headrest main body 110 and the holding portion 120 that exhibit the length adjusting function of the headrest itself, which is a technical feature of the headrest 100, will be mainly described.

The connection portion of the headrest 100 with the helmet body 20 is configured as a connection portion 112A and a connection portion 112B integrally extending from the headrest main body 110. A protrusion 112C is provided at the tip of the connection portion 112A and the tip of the connection portion 112B, respectively, and the protrusion 112C is fitted into a fitting hole (not shown) provided at a predetermined position of the helmet body 20 to form a helmet. The headrest 100 is attached to the main body 20.

The headrest main body 110 provided with such a connecting portion is preferably made of a flexible material, for example, integrally molded with a plastic resin having a certain level of strength. The headrest main body 110 is a thin frame body having a symmetrical shape, and is integrally formed by the right frame body 114R, the left frame body 114L, and the central frame body 114C connecting these right frame body 114R and the left frame body 114L. It is configured. As shown in the figure, the central frame 114C has a substantially trapezoidal shape (isosceles trapezoidal shape because it is symmetrical), and the right frame body 114R and the left frame body 114L have a substantially triangular shape extending in the substantially trapezoidal shape. The connecting portion 112B extends from the vicinity of the connecting portion between the central frame body 114C and the right frame body 114R, and the connecting portion 112A extends from the vicinity of the connecting portion between the central frame body 114C and the left frame body 114L. The substantially trapezoidal central frame 114C is composed of an upper side 114CU, a lower side 114CD, a right side 114CR and a left side 114CL, and the right side 114CR forms one side of a substantially triangular right frame 114R, and the left side 114CL. Formes one side of a substantially triangular left frame 114L.

The central frame 114C has an upper engaging claw 114UA and an upper engaging claw 114UB substantially in the center of the upper side 114CU of the central frame 114C, which functions as an adjusting means together with the holding portion 120, and an abbreviation for the lower side 114CD of the central frame 114C. A lower engaging claw 114DA and a lower engaging claw 114DB are provided in the center, respectively. These engaging claws are provided substantially perpendicular to the upper side 114CU or the lower side 114CD, and their open end sides are chamfered and formed in a hook shape to prevent them from falling out of the slide groove described later.

The holding portion 120 that functions as the adjusting means is a thin plate having a substantially triangular shape, and includes two elongated hole-shaped slide holes 120HA and slide holes 120HB formed in the vertical direction of the plane thereof. In the slide hole 120HA and the slide hole 120HB, the upper engaging claw 114UA and the upper engaging claw 114UB provided on the upper side 114CU of the central frame 114C of the headrest main body 110, and the lower engaging claw 114DA and the lower engaging claw 114DA provided on the lower side 114CD. The lower engaging claw 114DB is inserted.

As shown in FIG. 3B, the slide hole 120HA and the slide hole 120HB have three grooves on the upper side and three grooves on the lower side where the engaging claws are engaged and their positions are fixed. Be prepared. More specifically, the upper engaging groove 122UA to which the upper engaging claw 114UA is engaged and fixed to the slide hole 120HA is engaged and fixed at three places and the lower engaging claw 114DA is engaged and fixed to the lower engaging groove. The upper engagement claw 114UB is engaged and fixed in three places of the groove 122DA and the slide hole 120HB, and the upper engaging groove 122UB is engaged and fixed in three places and the lower engaging claw 114DB is engaged and fixed. Each of the three engagement grooves 122DB is provided. Further, the upper and lower ends of the grooves are also provided with grooves having the same shape as these grooves. Further, the number of grooves per slide hole is not limited to 6 (8 including the upper and lower ends).

When the engaging claws are engaged with the grooves, the engaging claws are fixed at the positions of the respective grooves to maintain the shape of the central frame 114C bent so as to approach the top and bottom as described later. Therefore, the lengths of the left and right ends of the headrest main body 110 can be adjusted while keeping the right frame body 114R and the left frame body 114L close to each other. Before wearing the helmet 10, the engagement claw and the groove are such that the wearer manually pinches the upper side 114CU and the lower side 114CD of the central frame 114C to bring the upper side 114CU and the lower side 114CD closer to each other or separate them from each other. The material and shape of the engaging claw are set so that the engaging claw does not easily come off the groove when the engaging claw is engaged with the groove.

A slide wall 124A and a slide wall 124B are erected on the left and right sides of the groove, and a slide wall 124C is erected between these grooves. The height of these slide walls is set to be equal to or higher than the height at which the engaging claw protrudes from the groove of the holding portion 120 so that the engaging claw can slide in the groove even if the holding portion 120 is covered with the wire holding mechanism 130. Is formed in.
The length adjusting function of the headrest 100 having the above configuration will be described with reference to FIG.

FIG. 4A shows a state in which the upper side 114CU and the lower side 114CD of the central frame 114C are most separated from each other, and FIG. 4D shows a state in which the upper side 114CU and the lower side 114CD of the central frame 114C are closest to each other. Shown, FIGS. 4 (B) and 4 (C) show their intermediate states, respectively. More specifically, FIG. 4 (A) corresponds to FIG. 3 (B), and FIG. 4 (B) shows that the upper engaging claw engages with the first groove from the top and the lower side in FIG. 3 (B). Corresponding to the state where the engaging claw is engaged with the first groove from the bottom, in FIG. 4 (C), the upper engaging claw is engaged with the second groove from the top and the bottom in FIG. 3 (B). Corresponding to the state where the side engaging claw is engaged with the second groove from the bottom, the upper engaging claw is engaged with the third groove from the top in FIG. 4 (C) and FIG. 3 (B). Moreover, it corresponds to the state where the lower engaging claw is engaged with the third groove from the bottom. In the following description, N = M (both N and M are natural numbers), the upper engaging claw engages with the Nth groove from the top, and the lower engaging claw is the Mth from the bottom. Although it will be described as engaging with the groove of, N ≠ M may be used.

From the state shown in FIG. 4A, when the wearer manually pinches the upper side 114CU and the lower side 114CD of the central frame 114C and brings the upper side 114CU and the lower side 114CD closer to each other by one step, that is, engages with the groove at the upper end of the groove. The upper engaging claw that is engaged is replaced with the first groove from the top, and the lower engaging claw that is engaged with the groove at the lower end of the groove is engaged with the first groove from the bottom. When it is replaced, the state shifts to the state shown in FIG. 4 (B). At this time, the upper side 114CU and the lower side 114CD of the central frame 114C are bent and approach each other, and the distance between the upper side 114CU and the lower side 114CD of the central frame 114C (here, the upper engaging claw 114UA and the lower engaging claw). The length, which is the distance to 114DA or the distance between the upper engaging claw 114UB and the lower engaging claw 114DB), is shortened from H (1) to H (2), and the right end of the right frame 114R (is used). ) And the left frame 114L (the left end), the length L (1) is shortened to L (2).

Further, from the state shown in FIG. 4B, when the wearer manually pinches the upper side 114CU and the lower side 114CD of the central frame 114C and brings the upper side 114CU and the lower side 114CD closer one step further, that is, the first from the top. The upper engaging claw that is engaged with the groove of the above is replaced with the second groove from the top, and the lower engaging claw that is engaged with the first groove from the bottom is changed from the bottom. When it is re-engaged with the second groove, it shifts to the state shown in FIG. 4 (C). At this time, the upper side 114CU and the lower side 114CD of the central frame 114C are bent and approach each other, and the length which is the distance between the upper side 114CU and the lower side 114CD of the central frame 114C is H (2) to H (3). The length is further shortened from L (2) to L (3), which is the distance between the right frame 114R (right end) and the left frame 114L (left end).

Further, from the state shown in FIG. 4C, when the wearer manually pinches the upper side 114CU and the lower side 114CD of the central frame 114C and brings the upper side 114CU and the lower side 114CD closer one step further, that is, the second from the top. The upper engaging claw that is engaged in the groove is replaced with the third groove from the top, and the lower engaging claw that is engaged in the second groove from the bottom is changed from the bottom. When it is re-engaged with the third groove, it shifts to the state shown in FIG. 4 (D). At this time, the upper side 114CU and the lower side 114CD of the central frame 114C are bent and approach each other, and the length which is the distance between the upper side 114CU and the lower side 114CD of the central frame 114C is H (3) to H (4). The length is further shortened from L (3) to L (4), which is the distance between the right frame 114R (right end) and the left frame 114L (left end).

Further, when the engaging claw is slid in the opposite direction to the above, the deflection between the upper side 114CU and the lower side 114CD of the central frame body 114C is loosened and separated to be the distance between the upper side 114CU and the lower side 114CD of the central frame body 114C. As the length H becomes longer, the length L, which is the distance between the right frame 114R (the right end) and the left frame 114L (the left end), becomes longer.
In this way, the headrest main body 110 is formed of a thin frame made of plastic resin having flexibility and a certain degree of strength so that the upper side 114CU and the lower side 114CD of the central frame 114C are brought close to each other. By bending the headrest body 114R and the left frame body 114L, the lengths of the left and right ends of the headrest body can be adjusted. This size adjustment function has a simple configuration as described above, and can be adjusted by the user by a simple procedure as described above, and also the central frame 114C which approaches / separates vertically in a flexible manner (right frame). Comfortable for users wearing bicycle helmets, as the headrest 100 can contact the wearer's back of the head over a large area to ensure sufficient stability to touch the wearer's back of the head (along with the body 114R and left frame 114L). A comfortable fit can be obtained.

As described above, according to the bicycle helmet 10 provided with the headrest 100 according to the present embodiment, the headrest 100 provides a comfortable wearing feeling for the user who wears the bicycle helmet 10 in order to provide the size adjustment function. be able to.
It should be noted that the embodiments disclosed this time are examples in all respects and are not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

For example, the following modes can be considered as modifications. As a holding portion, screw holes are provided through the surfaces of the upper side 114CU and the lower side 114CD of the central frame 114C facing each other (one is a right-handed screw and the other is a left-handed screw), and these screw holes are connected by all screws. Then, the upper side 114CU and the lower side 114CD may be brought close to each other or separated from each other by rotating all the screws, or may be held at that position by screwing the screws.

The present invention is suitable for a bicycle helmet that can provide a comfortable fit for a user wearing a bicycle helmet, and is particularly preferable in that the headrest has a size adjustment (adjuster) function.

10 Bicycle helmet 20 Helmet body 100 Headrest 110 Headrest body 120 Holding part 130 Wire holding mechanism 140 Dial

Claims (4)

A headrest with a size adjustment function suitable for a bicycle helmet, wherein the headrest abuts on the back of the user's head in the bicycle helmet, and the bicycle helmet includes a helmet body that protects the user's skull portion.
The headrest
The connection part with the bicycle helmet body and
A headrest body composed of one member that abuts on the back of the user's head and is longer in the horizontal direction than in the vertical direction.
A headrest including an adjusting means for adjusting the lengths of the left and right ends of the headrest body. The headrest body is a deformable frame body.
The adjusting means adjusts the lengths of the left and right ends of the headrest body by deforming the central portion of the headrest body so as to bring them closer to each other.
The headrest according to claim 1, wherein the adjusting means includes a holding portion that holds the shape of the central portion that is deformed so as to bring the top and bottom closer to each other. The headrest body is a thin frame made of a flexible material.
The adjusting means adjusts the lengths of the left and right ends of the headrest body by bending the central portion of the headrest body so as to bring them close to each other.
The headrest according to claim 1, wherein the adjusting means includes a holding portion that holds the shape of the central portion that is bent so as to bring the top and bottom close to each other. The headrest body is made of a flexible material and is a thin frame body having a symmetrical shape, and is a central frame body that connects the right frame body, the left frame body, the right frame body, and the left frame body. Formed by
The adjusting means adjusts the lengths of the left and right ends of the headrest body by bending the central frame body so as to bring them closer to each other so that the right frame body and the left frame body are brought closer to each other.
The headrest according to claim 1, wherein the adjusting means includes a holding portion that holds the shape of the central frame body that is bent so as to approach the top and bottom.