JP2015112997A - Headrest for vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable suppression of occurrence of a whiplash injury in a headrest without a sliding mechanism and a locking device.SOLUTION: A headrest 2 for a vehicle seat includes a fixed side headrest part 21 as a base, a movable side headrest part 23 which is movable upward and/or downward with respect to the fixed side headrest part, and a headrest cover 27. A connecting area 25 having a joining part 251 which joins at least the fixed side headrest part to the movable side headrest part and a fragile part 253 with a level of rigidity that is lower than that of the joining part is formed inside the headrest cover and between the fixed side headrest part and the movable side headrest part. The fragile part is located at least in a part of an extension of the connecting area, and further, the fragile part is located on the side of the center of the connecting area with respect to at least a part of the joining parts.

Description

  The present invention relates to a headrest for a vehicle seat. More specifically, the present invention relates to a vehicle seat headrest that has been improved to suppress the occurrence of whiplash.

Conventionally, it is widely known to employ a headrest for a vehicle seat. It is also known to provide a headrest by combining a portion fixed to the seat back and a portion that can move up and down with respect to the seat back (Patent Document 1).
With the headrest having the structure described in Patent Document 1, it is possible to suppress the occurrence of lashing in the occupant even when the vehicle has a rear collision (hereinafter referred to as “rear collision”). .

JP2013-169945A

  However, there is still room for improvement in the technique described in Patent Document 1. The technique described in Patent Document 1 requires a head mechanism with a slide mechanism, a lock device, and the like, and has a complicated structure.

  The present invention was devised in view of the above points, and the problem to be solved by the present invention is that it is possible to suppress the occurrence of whiplash even in a headrest not provided with a slide mechanism or a lock device. There is.

In order to solve the above problems, the present invention takes the following means.
First, a first invention is a vehicle seat headrest having a fixed headrest portion serving as a base, a movable headrest portion movable upward and / or downward relative to the fixed headrest portion, and a headrest cover. The inner portion of the headrest cover, and between the fixed headrest portion and the movable headrest portion, at least a connecting portion used for connecting the fixed headrest portion and the movable headrest portion, and a connecting portion And a weakened portion having a lower rigidity than that of the connecting area. The weakened portion constitutes at least a part of the edge of the connected area, and the center of the connected area is at least a part of the connecting portion. The weak part is located on the side.

  According to the first aspect of the present invention, there is provided a vehicle seat having a fixed headrest portion serving as a base, a movable headrest portion movable upward and / or downward with respect to the fixed headrest portion, and a headrest cover. A headrest, a connecting portion used to connect at least the fixed headrest portion and the movable headrest portion between the fixed headrest portion and the movable headrest portion, and the inside of the headrest cover; And a weakened portion having a lower rigidity than the portion, the weakened portion constitutes at least a part of the edge of the connected area, and at least a portion of the connected area than the part of the connecting portion. Since the fragile part is located on the center side, the movable headrest part is easy to move upward and / or downward, and a slide mechanism, a locking device, etc. are installed. There is no need for that.

  The second invention is characterized in that, in the first invention, a plurality of connecting portions are arranged at intervals in the vertical direction.

  According to the second invention, since a plurality of connecting portions in the first invention are arranged at intervals in the vertical direction, the connecting portions can be easily tilted upward and / or downward. is there. Moreover, it is possible to make the supporting force with respect to the load applied from the front to the rear relatively high.

  A third invention is characterized in that, in the first or second invention, a rigid member having higher rigidity than a member used for the connecting portion is disposed in front of the connecting portion in the movable side headrest portion.

  According to the third aspect of the invention, the movable side headrest portion in the first or second aspect is provided with the rigid member having higher rigidity than the member used for the joint portion in front of the joint portion. It is possible to suppress the local crushing and to make the structure easy to fall down in the upward and / or downward direction.

  According to a fourth aspect of the present invention, in the first to third aspects, the connecting portion is formed in a band shape, and the width of the end portion on the fixed side headrest portion side is the movable side headrest portion. It is characterized by being narrower than the vertical width of the end portion on the side.

  According to the fourth aspect of the invention, the connecting portion in the first to third aspects is formed in a band shape, and the width of the end portion on the fixed side headrest portion side of the band-like connecting portion is movable. Since the width in the vertical direction of the end portion on the headrest side is narrower, the fragile portion can be easily tilted upward and / or downward.

  According to the present invention, it is possible to suppress the occurrence of whiplash even with a headrest that is not provided with a slide mechanism.

1 is a perspective view of a vehicle seat to which the present invention is applied. It is sectional drawing showing the longitudinal cross-section of the headrest of the vehicle seat of 1st Embodiment. It is the figure which showed the state which applied the headrest of this invention to the vehicle seat. It is the elements on larger scale which showed the state which a headrest deform | transforms. It is the perspective view of the headrest which showed the internal structure with the broken line. It is sectional drawing which showed the state which has arrange | positioned the closing member in the recessed part of a headrest. It is a figure which shows the behavior of the headrest which provided the closing member in the recessed part when a load is applied from the passenger | crew. It is sectional drawing showing the longitudinal cross-section of the headrest of the vehicle seat of 2nd Embodiment. It is sectional drawing showing the longitudinal cross-section of the headrest of the vehicle seat of 3rd Embodiment.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings as appropriate.
Note that in the present specification, directions such as the front-rear direction, the up-down direction, and the left-right direction are defined as X in the front direction, Y in the left direction, and Z in the up direction shown in FIG. For example, normally, when the occupant is seated, entering the field of view is the front, and the occipital side not entering the field of view is the rear.
The vehicle in the present embodiment is a vehicle, and a seat cushion including a seat back 3 having a support surface that mainly faces the back of the occupant and a support surface that mainly faces the thigh of the occupant. 4 and a headrest 2 having a support surface that mainly faces the occupant's head PH.
The headrest 2 is connected to the seat back 3 and has a fixed-side headrest portion 21 serving as a base and a movable-side headrest portion 23 movable in the vertical direction with respect to the fixed-side headrest portion 21 serving as a base. It is. More precisely, the movable-side headrest 23 can be moved diagonally upward or diagonally downward, particularly in the vertical direction. In addition, the dashed-two dotted line of FIG.1, FIG.3, FIG.4 and FIG. 6 has shown the state which the headrest part 23 moved to the movable side upwards.
The movable side headrest part 23 and the fixed side headrest part 21 are covered with a headrest cover 27. Further, a connection area 25 is formed between the movable headrest portion 23 and the fixed headrest portion 21. The connection area 25 is a part that allows the movable headrest portion 23 to move upward or downward relative to the fixed headrest portion 21 that is fixed. In order to facilitate understanding, in FIG. 2, FIG. 6, FIG. 8, and FIG.
A pad member is disposed inside the headrest 2, the seat back 3, and the seat cushion 4 of the vehicle seat 1. As the pad member, a member generally used in the vehicle seat 1 is used. More specifically, elastic foamed urethane is used.

Next, the details of the headrest 2 of the vehicle seat 1 in the first embodiment will be described.
About the headrest 2 in 1st Embodiment, the fixed side headrest part 21, the connection area 25, and the movable side headrest part 23 are provided. The fixed-side headrest portion 21, the connection area 25, and the movable-side headrest portion 23 in the present embodiment will be described with reference to FIG. 2. Among the headrest 2, the portion partitioned by A in FIG. 2, the portion located inside the headrest cover 27 (the portion shaded with a broken line) among the portions partitioned by B in FIG. 2 is the connection area 25, and the portion partitioned by C is the movable side It is a headrest portion 23. The front portion of the connection area 25 is partitioned by the movable headrest portion 23, the rear portion is partitioned by the fixed headrest portion 21, and the top, bottom, left and right portions are partitioned by the headrest cover 27. Yes.
In addition to the headrest stay 211, the fixed-side headrest portion 21 in the embodiment is configured to include a substantially flat fixed-side pad portion 212 formed using a pad member at the top. Moreover, the movable side headrest part 23 in the embodiment is configured to include a substantially flat movable side pad portion 231 formed using a pad member. The fixed pad portion 212 is configured to be movable upward or downward with respect to the movable pad portion 231. Further, a connection area 25 that connects the fixed side pad part 212 and the movable side pad part 231 is formed between the fixed side pad part 212 and the movable side pad part 231. That is, paying attention to the pad member, it has a three-layer structure of the movable side pad portion 231, the connection area 25, and the fixed side pad portion 212. The connection area 25 is configured to be less rigid than general portions of the fixed-side pad portion 212 and the movable-side pad portion 231, and the schematic shapes of the fixed-side pad portion 212 and the movable-side pad portion 231 are changed. The connecting area 25 is configured to be deformable even in the absence of the connection area 25. In the present embodiment, the connecting area 25 is provided with a connecting portion 251 so as to connect the fixed headrest portion 21 and the movable headrest portion 23, and the weakened portion 253 having a lower rigidity than the connecting portion 251 is also provided. By providing, the rigidity of the whole connection area 25 is made smaller than the movable side headrest part 23 or the fixed side headrest part 21. In particular, since the connecting portion 251 and the fragile portion 253 are alternately arranged in the vertical direction, the connecting portion 251 is easily inclined in the vertical direction, so the movable side headrest portion 23 becomes the fixed side headrest portion 21. On the other hand, it is easy to move up and down.

  The connection area 25 of the present embodiment is configured by arranging a plurality of connecting portions 251 that connect at least the fixed-side pad portion 212 and the movable-side pad portion 231 at intervals. In addition, in order to form a weakened portion 253 that is more fragile than the connecting portion 251 in the connecting area 25, a concave portion 253b is provided in a part of the edge of the connecting area 25, particularly in a portion located above and below the connecting area 25. ing. Further, in order to form the weakened portion 253 that is more fragile than the connecting portion 251, the connecting area 25 is provided with a space portion 253 a in which a hollow portion is provided at the center side of the connecting area 25 rather than at least a part of the connecting portion 251. ing.

  In the present embodiment, the fixed-side pad portion 212, the movable-side pad portion 231 and the connecting portion 251 are integrally formed, and the connecting portion 251 is also formed by a pad member. That is, the fixed pad portion 212, the movable pad portion 231 and the connecting portion 251 are formed using the same pad member. In particular, the fixed pad portion 212, the movable pad portion 231 and the connecting portion 251 are formed so as to be continuous with the same pad member. In addition, the connection part 251 is a strip | belt shape extended in the left-right direction, and the connection area 25 is comprised by arranging the said connection part 251 at intervals in the up-down direction in parallel.

  The connecting portion 251 formed by the pad member is set to a rigidity that can be deformed by the occupant's head PH colliding with the movable pad portion 231. In addition, a receiving member 232a is disposed on the back side of the movable pad portion 231 as a rigid member 232 having higher rigidity than the connecting portion 251 so that a load applied to the movable pad portion 231 can be received by the surface. ing. As shown in FIG. 2, the receiving member 232 a has a size capable of straddling a plurality of connecting portions 251 provided in the connection area 25 in the vertical direction, and fits on one side surface of the movable side pad portion 231. It has a surface with a size of about. In addition, the receiving member 232a is configured to be more rigid than the portion of the movable pad portion 231 that is located on the front side of the receiving member 232a, and the load applied to the connecting portion 251 that is located on the rear side of the receiving member 232a is dispersed. It is configured to be. At the time of a rear collision, the connecting portion 251 is bent by transmitting a load applied from the passenger's head PH to the headrest 2 via the receiving member 232a (see FIGS. 3 and 4). ). 4 shows that the load directed in the direction indicated by the white arrow is applied from the head PH to the movable side pad portion 231. In addition to this load, the seat back 3 tilts. When the head PH of the occupant attempts to move upward, the end of the connecting portion 251 on the movable pad portion 231 side is displaced upward as indicated by a two-dot chain line. Depending on the direction of the load applied from the head PH, the end of the connecting portion 251 on the movable pad portion 231 side can be displaced downward.

  The connection area 25 according to the present embodiment has a shape in which a concave portion 253b that becomes a fragile portion 253 is provided at the upper and lower ends thereof. The concave portions 253b provided at the upper and lower ends are arranged so as to be parallel to the connecting portion 251 and are configured to easily tilt when the connecting portion 251 receives a force directed in the vertical direction. Moreover, the space part 253a in which nothing is arranged between the connecting portions 251 is configured as the weakened portion 253, and the connecting portion 251 is not easily tilted. In addition, the relationship between the connection part 251 and the space part 253a can be grasped | ascertained that the connection part 251 is comprised as a result by arranging the space part 253a of substantially rectangular parallelepiped shape in parallel. Further, it is possible to grasp that the connection area 25 is configured by weakening the support rigidity by arranging the space portion 253a in parallel at a specific portion of the substantially uniformly formed member.

The connecting portion 251 is configured to extend in the front-rear direction in order to have an appropriate support force with respect to a load in the horizontal direction from the front to the rear.
It is desirable that the connecting portion 251 has a rigidity that can maintain the shape to some extent for the load applied in the front-rear direction, but adapts to the movement of the head PH of the occupant to move up and down. It is desirable to make it. More specifically, when a load is applied in the vertical direction, it is desirable that the connecting portion 251 be deformed even if the load is relatively weak.
For this reason, moderate rigidity is provided so that the connecting portion 251 is not deformed by a load of a normal level. In particular, in the present embodiment, the movable-side pad portion 231 and the fixed-side pad portion 212 are arranged substantially in parallel, and the connecting portion 251 is extended so as to extend substantially perpendicular to the fixed-side pad portion 212. Provided. Further, a constricted portion 251a having a vertical thickness thinner than other portions is provided near the fixed side pad portion 212 of the connecting portion 251. Since it is such a form, the space site | part 253a which is the weak part 253 becomes a cross-sectional view substantially convex shape. The constricted portion 251a can be provided near the movable side pad portion 231 of the connecting portion 251. The constricted portion 251a is provided near both the movable side pad portion 231 and the fixed side pad portion 212 of the connecting portion 251. It is also possible. It is preferable to provide the constricted portions 251a at both ends of the connecting portion 251 because the connecting portions 251 are further easily deformed.

A headrest cover 27 is attached around the pad member. Among the headrest cover 27, the upper and lower side surfaces and the left and right side surfaces, which are so-called kamachi portions (see the shaded portions in FIG. 5), have higher stretchability than other portions by adopting a knitted structure. Structure.
The concave portions 253b positioned above and below the connecting portion 251 of the headrest 2 may cause streaks in the headrest cover 27 when the headrest cover 27 is covered with the headrest pad, and may not be desirable as a design. . This can be dealt with by arranging the closing member 71 in the space of the recess 253b to make the uneven shape. For example, it is possible to suppress the occurrence of streaks in the headrest cover 27 by disposing urethane resin having a lower rigidity than other parts as the closing member 71 (see FIGS. 6 and 7). Also in this aspect, the connection area 25 is partitioned by the headrest cover 27. Therefore, the closing member 71 is located at a part of the edge of the connection area 25. As shown in FIG. 7, regardless of the presence of the closing member 71, the movable pad portion 231 can be displaced with respect to the fixed pad portion 212. That is, the closing member 71 does not increase the rigidity of the region where the connecting portion 251 is arranged, and thus the portion where the closing member 71 is located functions as the fragile portion 253.

Next, a manufacturing method for the headrest 2 of the present embodiment will be briefly described.
In order to manufacture the headrest 2 of the present embodiment, the pad member, the headrest stay 211, and the receiving member 232a are integrally foam-molded. Further, the headrest 2 is formed by covering the headrest cover 27 around the pad member.
First, in order to integrally foam the pad member, the headrest stay 211, and the receiving member 232a, the headrest stay 211 and the resin plate are disposed inside a foaming mold (not shown). This resin plate functions as a receiving member 232a after foam molding. Between the resin plate and the headrest stay 211, a through-hole forming mold part capable of forming a space part 253 a inside the foamed molded body by removing the foamed molded body after the foaming liquid is solidified and removing it. (Not shown).
The foaming liquid is introduced into the inside of the foaming mold in which necessary members are arranged, and heated to solidify the foaming mold in a state where the foaming liquid is filled. Since the means for solidifying the foaming liquid is usually used, its detailed description is omitted.
By removing the through-hole forming mold from the solidified foam molded body, a foam molded body provided with a connecting portion 251 extending in the left-right direction and a hole-like space portion 253a penetrating in the left-right direction is formed (FIG. 5). In addition, the receiving member 232a and the headrest stay 211 are in a state of being connected to a pad member formed by solidifying the foaming liquid.
The headrest cover 27 of the present embodiment is completed by covering the foamed molded body with the headrest cover 27 and fixing the ends thereof with a joining means.

According to the present embodiment, it is possible to form the headrest 2 that can move the movable headrest portion 23 in the vertical direction without using a slide mechanism or the like.
In addition, since the rigid member 232 having higher rigidity than the connecting portion 251 is disposed on the front side of the connecting portion 251, the load applied to the connecting portion 251 from the front to the rear is dispersed substantially horizontally. Is possible.
Further, since a pad member having lower rigidity than the rigid member 232 is disposed on the front side of the rigid member 232, it is possible to provide flexibility when supporting the head PH of the occupant. At the same time, the load from the head PH can be appropriately supported.
In addition, the fixed-side pad portion 212 and the movable-side pad portion 231 are arranged in parallel, and the connecting portion 251 that connects the fixed-side pad portion 212 and the movable-side pad portion 231 is substantially the same as the fixed-side pad portion 212. Since it is formed so as to protrude in the vertical direction, it is possible to firmly receive a load applied from the front to the rear with respect to the connecting portion 251. On the other hand, since the connecting portion 251 can be deformed so as to receive a load applied to the connecting portion 251 in the vertical direction, a vertical force is applied from the headrest 2 to the occupant's head PH. It can be suppressed.
Further, since the thickness in the vertical direction of the portion close to the fixed pad portion 212 in the connecting portion 251 is formed so as to be the thinnest in the connecting portion 251, the connecting portion 251 is easily inclined in the vertical direction.
Moreover, since the space part 253a penetrated in the left-right direction is formed between the connection parts 251, the connection part 251 becomes easy to incline up and down.
In addition, since the receiving member 232a is formed of resin, it is possible to maintain rigidity and be relatively lightweight.
In addition, since the recess 253b is provided with a member having a lower rigidity than other parts, even if the recess 253b is provided, it is possible to suppress the occurrence of partial streaks (slack) or the like in the headrest cover 27. In addition, the movable headrest portion 23 can be appropriately moved in the vertical direction.
In addition, since the knitted structure is adopted on the left and right side surfaces and the upper and lower side surfaces of the headrest cover 27, the headrest cover 27 is deformed so as to follow even when the operating side pad portion is about to move in the vertical direction. It becomes possible to move the side headrest 2 appropriately in the vertical direction.
Further, since the movable pad portion 231 can be displaced in the vertical direction by tilting the pad member used for the connecting portion 251, if the load from the head PH is not applied to the headrest 2, The pad portion 231 can return to the normal position. Therefore, the work for returning the movable pad portion 231 to the normal position is not necessary, and the headrest 2 that is easy to use for the user can be obtained.

Unlike the first embodiment, the fixed-side pad portion 212 and the movable-side pad portion 231 may be configured not to be continuously integrated with the connecting portion 251.
For example, a structure in which two members are in contact with each other as in the second embodiment shown in FIG. 8 or the third embodiment shown in FIG. 9 is also possible. More specifically, the connecting portion 251 formed so as to protrude from the movable pad portion 231 and the connecting portion 251 formed so as to protrude from the fixed side pad portion 212 come into contact with each other, so that the movable pad It is also possible to configure so as to regulate the position of the part 231. In the case of the mode shown in FIG. 8, the weakened portion 253 that forms the edge of the connection area 25 is formed by the non-joining region extending in the vertical direction provided between the connecting portion 251 and the movable pad portion 231. Moreover, the weak part 253 located in the center side of the connection area 25 rather than a part of connection part is formed of the non-joining area | region extended in the front-back direction provided between the connection part 251 and the stationary-side pad site | part 212. FIG. .
The mode shown in FIG. 8 is a mode in which a non-joining region is formed so as to form a relatively large space in the connection area 25. However, as shown in FIG. It is also possible to adopt a mode in which the irregularities formed by the pad portion 231 and the connecting portion 251 are meshed so that they are in close contact with each other without a gap. In this case, since they are in close contact with each other but are not bonded, it is relatively easy to separate the fixed pad portion 212 and the movable pad portion 231. The joints in close contact with each other are positively deformed due to concentration of stress. In this case, the fragile portion 253 is formed by a seam.
The movable side pad part 231 is maintained in contact with the fixed side pad part 212, but is formed so as to protrude from the fixed side pad part 212 and the connecting part 251 that protrudes from the fixed side pad part 212. Even if the state is maintained only by the frictional force generated between the connecting portion 251 and the headrest cover 27 covering the movable side pad portion 231 and the fixed side pad portion 212, the state may be maintained. .
The structure in which the fixed-side pad portion 212 and the movable-side pad portion 231 are not continuously integrated with the connecting portion 251 is not limited to the contact between the two members. By combining a plurality of movable pad portions 231, it is possible to adopt a mode in which three or more pad members are in contact with each other. When the headrest 2 is formed by contacting a plurality of members in this manner, it is possible to suppress the unevenness of the pad member in the portion facing the headrest cover 27, and thus the headrest cover 27 has streaks. This can be suppressed.
Note that voids caused by bubbles generated when the pad member is foamed are not included in the fragile portion 253 in this specification.

As mentioned above, although demonstrated using the specific example, this invention can be implemented with other various forms besides the said embodiment.
For example, the present invention can be applied to a so-called active headrest having a front movable side portion on the front side of the headrest. In this case, the configuration of the headrest pad at the portion that can be moved forward can be configured by the movable side pad portion, the connecting portion, and the fixed side pad portion as in the present embodiment. In this case, the portion corresponding to the movable pad portion provided in the portion movable forward is the movable headrest portion, the portion corresponding to the connecting portion is the connection area, and the portion connected to the connecting portion. The portion connected to the seat back from the front corresponds to the fixed-side headrest portion.
In addition, a blocking member is not the only way to suppress the occurrence of streaks in the headrest cover due to the recesses provided in the connection area. For example, by increasing the thickness of the headrest cover, it is also possible to suppress the occurrence of streaks in the headrest cover due to the recesses. In this case, the thickness of the entire headrest cover may be increased, or the portion adjacent to the recess may be made thicker than other portions.
In addition, the closing member such as urethane disposed in the recess provided in the connection area may not be provided above and below the headrest. For example, it is also possible to provide only in the upper part that is easily visible.
Further, the connection area is not limited to providing strip-shaped connecting portions in parallel at intervals. For example, a pad member having a lower rigidity than the pad member used for the movable headrest portion can be disposed in a portion corresponding to the space of the embodiment. Even if it is such an aspect, the vulnerability of a connection area is ensured, and also a headrest cover and a headrest pad can be formed integrally. Specifically, after a low-rigidity pad, a headrest cover, and a receiving member that are arranged at a predetermined interval from the headrest stay are arranged in a foaming mold, a resin that forms the main part of the headrest pad is formed inside the pad. If foam molding is performed, the headrest cover and the headrest pad can be integrated. In the case of such a form, the portion having the same rigidity as the pad member used for the movable headrest portion located in the connection area is a connecting portion, and the pad has a lower rigidity than the pad member used for the movable headrest portion. The part of the member is a fragile part.
In addition, the connecting portion is not in a shape extending horizontally, and the connecting portion may be inclined in the vertical direction. For example, it is possible to adopt a configuration in which a portion connected to the movable pad portion of one connecting portion is positioned above a portion connected to the fixed pad portion.
Further, in the present embodiment, the movable headrest portion is configured to be movable upward and downward from the normal state, but is configured to be movable only upward or downward from the normal state. Also good.
Moreover, it is also possible not to provide a recessed part in a connection area. In this case, it is preferable to reduce the thickness of the connecting portions located at the upper and lower ends so that the connecting portions are easily tilted.
In addition, the space provided in the connection area may not be configured to penetrate from side to side, and the number, shape, size, and the like thereof can be determined as appropriate.
Moreover, the part with the thinnest thickness in the vertical direction is not limited to the part connected to the fixed pad portion. For example, it is possible to make the thickness of the central portion in the front-rear direction of the joint portion the smallest or make the other portions the thinnest. However, it is desirable to make the portion where the connecting portion is connected to the fixed-side pad portion the thinnest because the connecting portion easily tilts.
Further, the fixed-side headrest portion, the movable-side headrest portion, and the connection area may not be formed at a time. For example, the movable side headrest part and / or the fixed side headrest part may be formed as a separate member first, and the separate member may be placed in a foaming mold and then integrally foamed.
Further, the side surface of the headrest cover need not be configured using a knitted structure. Since it only needs to have a desired stretchability, it is also possible to use a cloth configured using a chemical fiber having stretchability.
Also, there is no need to configure the entire side surface of the headrest cover with a stretchable member, and it is possible to make the entire side surface stretchable by using a partially stretchable material. .
In addition, the fragile part is exemplified by a cavity or a member having rigidity lower than that of the periphery, but in a range that can fulfill its purpose, any part of any form is adopted. It doesn't matter.
Further, the vehicle is not limited to being a vehicle, and may be a vehicle that moves in the air such as an airplane or a helicopter, or a vehicle that moves on the sea surface or in the sea such as a ship or a submersible.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Headrest 21 Fixed side headrest part 23 Movable side headrest part 25 Connection area 27 Headrest cover 211 Headrest stay 212 Fixed side pad part 231 Movable side pad part 232 Rigid member 251 Connection part 253 Fragile part 253a Spatial part 253b Recessed part PH head

Claims (4)

A vehicle seat headrest having a fixed headrest portion serving as a base, a movable headrest portion movable upward and / or downward relative to the fixed headrest portion, and a headrest cover,
The inner part of the headrest cover, and between the fixed headrest part and the movable headrest part, at least a connecting part used for connecting the fixed headrest part and the movable headrest part, and a rigidity higher than the connecting part. A connection area having a low fragile portion, and
A vehicle seat headrest characterized in that at least a part of the edge of the connection area is formed by a weak part, and further, the weak part is located at the center side of the connection area rather than at least a part of the connection part. The vehicle seat headrest according to claim 1,
A headrest for a vehicle seat, wherein a plurality of connecting portions are arranged at intervals in the vertical direction. A headrest for a vehicle seat according to claim 1 or 2,
A headrest for a vehicle seat, wherein a rigid member having rigidity higher than that of a member used for the connecting portion is disposed in front of the connecting portion on the movable headrest portion. The vehicle seat headrest according to any one of claims 1 to 3,
The connecting portion is formed in a band shape, and the band-shaped connecting portion is characterized in that the vertical width of the end on the fixed side headrest side is narrower than the vertical width of the end on the movable side headrest side. Vehicle seat headrest.

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