Vehicle seats

Abstract

To obtain a vehicle seat that can suppress displacement of the head of a seated occupant to a front side by a neck pillow, and can excellently release a support state by the neck pillow when a load acting on the neck of the seated occupant is excessive.SOLUTION: A neck pillow 20 is composed of a pair of left and right pillow components 22, 24, and can support a neck P2 of a seated occupant P from a lateral side and a front side. The pair of left and right pillow components 22, 24 can rotate around an axis line in a seat vertical direction with a fitting side to a seat body 12 as a base part side. A coiled spring disposed on the base part side of the pillow components 22, 24 energizes the neck pillow 20 so that a front side left portion 22F and a right side left portion 24F in the neck pillow 20 are brought into contact with each other.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a vehicle seat equipped with a neck pillow. [Background technology]

[0002] Patent Document 1 below discloses a vehicle neck pillow. Briefly, this vehicle neck pillow has an attachment member attached to a leg supporting a headrest of a vehicle seat, and a pillow main body supported by the attachment member, which extends in the vehicle width direction. An adjustment cord is attached to the pillow main body, and the adjustment cord can adjust the distance between both ends of the pillow main body in the vehicle width direction by adjusting the amount of pulling on the pillow main body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-50929 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-mentioned prior art does not prevent the occupant's head from displacing forward. On the other hand, a neck pillow that extends to the front of the occupant's neck can support the front side of the occupant's neck and prevent the occupant's head from displacing forward, but there is room for improvement in terms of releasing the support state when the load acting on the occupant's neck is excessive.

[0005] Taking the above facts into consideration, the present invention aims to provide a vehicle seat that can prevent the head of a seated occupant from displacing forward using a neck pillow, and that can effectively release the support provided by the neck pillow when excessive load is applied to the neck of the seated occupant. [Means for solving the problem]

[0006] The vehicle seat of the present invention as set forth in claim 1 comprises a seat body on which an occupant sits and which supports the upper body of the seated occupant; a neck pillow attached to an upper part of the seat body so as to be able to support the neck of the seated occupant from the sides and the front, and having a front left part located in front of and to the left of the neck of the seated occupant and a front right part located in front of and to the right of the neck of the seated occupant, which are movable toward and away from each other in the seat width direction; and a neck pillow attached to the neck pillow so that the front left part and the front right part of the neck pillow abut against each other. With spring force and a biasing member for biasing.

[0007] According to the above-described configuration, the seat body on which the occupant sits supports the seated occupant from below and also supports the upper body of the seated occupant. A neck pillow is attached to the upper part of the seat body. The neck pillow is capable of supporting the neck of the seated occupant from the sides and the front, and has a front left portion located in front of and to the left of the neck of the seated occupant and a front right portion located in front of and to the right of the neck of the seated occupant that can move toward and away from each other in the seat width direction.

[0008] Here, the neck pillow is provided with a biasing member, and this biasing member biases the neck pillow so that the front left portion and the front right portion of the neck pillow abut against each other. With spring force Therefore, when the neck pillow is in use, even if a force acts to displace the head of the seated occupant toward the front of the seat, as long as the load acting on the neck of the seated occupant is not excessive, the front left and front right parts of the neck pillow will prevent the neck of the seated occupant from being displaced toward the front of the seat, and therefore the head of the seated occupant will be prevented from being displaced toward the front of the seat. On the other hand, when the neck pillow is in use, if the load acting on the neck of the seated occupant is excessive, the biasing member Spring force ( urging force ) When the front left portion and the front right portion move away from each other against the force, the support provided by the neck pillow is released.

[0009] The vehicle seat of the present invention described in claim 2 has the configuration described in claim 1, wherein the neck pillow is composed of a pair of left and right pillow components, each of which is rotatable around an axis in the up-down direction of the seat with its attachment side to the seat main body as a base side, and the biasing member is provided in a pair on the left and right corresponding to the pair of left and right pillow components and biases each of the pair of left and right pillow components to rotate around its rotation axis and toward a side that brings the front left portion and the front right portion into contact.

[0010] According to the above configuration, the pair of left and right pillow components that make up the neck pillow are each rotatable around an axis in the up-down direction of the seat, with the attachment side to the seat main body being the base side. Furthermore, a pair of biasing members are provided corresponding to the pair of left and right pillow components, biasing each of the pair of left and right pillow components to rotate around its rotation axis and in a direction that brings the front left and front right portions into contact. This allows for stable biasing of the neck pillow without complicating the structure.

[0011] The vehicle seat of the present invention described in claim 3 is configured as described in claim 2, wherein the pair of left and right pillow structures are each supported rotatably around an axis in the seat width direction relative to the skeleton of the seat body, and are configured to be displaceable between a storage position in which they are arranged along the outer shape of the seat body, and a use position in which they support the neck of a seated occupant from the lateral and frontal sides.

[0012] According to the above configuration, the pair of left and right pillow components are each supported rotatably about an axis in the seat width direction relative to the framework of the seat body, and are displaceable between a stored position where they are arranged along the outer shape of the seat body and an in-use position where they support the neck of the seated occupant from the sides and front. Therefore, when the neck pillow is not in use, it can be placed in the stored position where it does not get in the way. [Effects of the Invention]

[0013] As described above, the vehicle seat of the present invention has the excellent effect of being able to prevent the head of a seated occupant from being displaced forward by the neck pillow, and also being able to effectively release the support provided by the neck pillow when excessive load is applied to the neck of the seated occupant. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view showing a vehicle seat according to an embodiment of the present invention in a state in which a neck pillow is stored. [Figure 2] 2 is a perspective view showing a state in which the neck pillow shown in FIG. 1 has been rotated about an axis in the seat width direction and opened. FIG. [Figure 3] 2 is a side view showing a state in which the neck pillow in the state of FIG. 1 has been rotated about an axis in the seat width direction. FIG. [Figure 4] FIG. 2 is a perspective view showing the neck pillow in use. [Figure 5A] FIG. 10 is a schematic plan view showing the neck pillow in an open state in a simplified manner. [Figure 5B] FIG. 10 is a schematic plan view showing the neck pillow in a simplified state when closed. [Figure 6] FIG. 2 is a simplified perspective view showing the internal mechanism of the neck pillow and part of the peripheral portion of the neck pillow. [Figure 7] FIG. 10 is an exploded perspective view showing a hinge portion between the upper pipe side of the seat back and the neck pillow. [Figure 8A] FIG. 10 is a simplified perspective view showing the state of the internal mechanism of the neck pillow when stored. [Figure 8B] FIG. 8B is a perspective view showing the state of the hinge portion in the state shown in FIG. 8A. [Figure 9A] 8B is a perspective view showing, in a simplified manner, the state of the internal mechanism of the neck pillow when the neck pillow in the state of FIG. 8A has been rotated about an axis in the seat width direction and opened. FIG. [Figure 9B] FIG. 9B is a perspective view showing the state of the hinge portion in the state shown in FIG. 9A. [Figure 10A]9B is a perspective view showing, in a simplified form, the state of the internal mechanism of the neck pillow when the neck pillow, which is in the state of FIG. 9A, has rotated about an axis in the up-down direction of the seat and is now in a closed state. FIG. [Figure 10B] FIG. 10B is a perspective view showing the state of the hinge portion in the state shown in FIG. 10A. [Figure 11A] FIG. 1 is a schematic plan view showing, in a simplified form, the state of the neck pillow during normal use. [Figure 11B] FIG. 10 is a schematic plan view showing, in a simplified manner, the state of the neck pillow when a lateral overload occurs. [Figure 11C] FIG. 10 is a schematic plan view showing, in a simplified manner, the state of the neck pillow during a frontal collision. [Figure 12A] FIG. 10 is a side view schematically illustrating a state in which a vehicle decelerates in a comparative structure. [Figure 12B] 1 is a side view schematically illustrating a state during deceleration of a vehicle in a vehicle seat according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0015] A vehicle seat according to one embodiment of the present invention will be described with reference to Figures 1 to 12B. Note that the arrows FR, UP, and LH shown as appropriate in each figure indicate the front, upper, and left directions of the vehicle seat 10, respectively. Hereinafter, when the terms "front-rear," "up-down," and "left-right" are used in the description, they refer to the front-rear direction of the seat, the up-down direction of the seat, and the left-right direction of the seat (seat width direction), unless otherwise specified. Also, in each figure, some symbols may be omitted to make the drawings easier to read.

[0016] (Configuration of the embodiment) Fig. 1 shows a perspective view of a vehicle seat 10 according to this embodiment. Fig. 1 shows a state in which the neck pillow 20 is stored. The vehicle seat 10 includes a seat main body 12 on which an occupant sits and which supports the upper body PS of the seated occupant P. The seat main body 12 includes a seat cushion 14 which forms a seating portion on which the occupant sits and which supports the buttocks and thighs of the seated occupant P, a seat back (also referred to as a "backrest") 16 which supports the back of the seated occupant P, and a headrest 18 which supports the head of the seated occupant P.

[0017] A neck pillow 20 is attached to the upper part of the seat body 12. Fig. 2 shows a perspective view of the neck pillow 20 in the stored state shown in Fig. 1 rotated about an axis in the seat width direction and opened. Fig. 3 shows a side view of the neck pillow 20 in the stored state shown in Fig. 1 rotated about an axis in the seat width direction (see arrow R1), and Fig. 4 shows a perspective view of the neck pillow 20 in use.

[0018] As shown in Fig. 4, the neck pillow 20 is capable of supporting the neck P2 of the seated occupant P from the lateral and front sides. The rear side of the neck P2 of the seated occupant P can be supported by the upper end of the seat back 16. In other words, the configuration of this embodiment is capable of supporting the neck P2 of the seated occupant P from all around. As shown in Figs. 2 and 4, the neck pillow 20 is configured so that a front left portion 22F, which is disposed in front of and on the left side of the neck P2 of the seated occupant P, and a front right portion 24F, which is disposed in front of and on the right side of the neck P2 of the seated occupant P, can move toward and away from each other in the seat width direction.

[0019] Fig. 5A shows a schematic plan view illustrating the neck pillow 20 in an open state, and Fig. 5B shows a schematic plan view illustrating the neck pillow 20 in a closed state. As shown in Fig. 5A and Fig. 5B, the neck pillow 20 is composed of a pair of left and right pillow components 22, 24. Each of the pair of left and right pillow components 22, 24 is rotatable around an axis in the up-down direction of the seat, with the side attached to the seat main body 12 as the base side. In Fig. 5B, the arrow R2 indicates the direction in which the pair of left and right pillow components 22, 24 close, among the rotation directions of the pair of left and right pillow components 22, 24.

[0020] Fig. 6 shows a simplified perspective view of the internal mechanism of the neck pillow 20 and part of the surrounding area of ​​the neck pillow 20. In Fig. 6, the outer shape of the vehicle seat 10 is shown by a two-dot chain line (the same applies to Figs. 8A, 9A, and 10A described below). As shown in Fig. 6, an upper pipe 17 that constitutes part of the skeleton (seat back frame) of the seat back 16 is arranged in the upper part of the seat back 16.

[0021] Lower ends 17A of the upper pipes 17 are disposed on both ends of the seat back 16 in the seat width direction and extend in the seat width direction, while upper ends 17B of the upper pipes 17 are disposed in the center of the seat back 16 in the seat width direction and extend in the seat width direction, with the lower ends 17A and the upper ends 17B being connected in a stepped manner in a front view of the seat. An inverted U-shaped portion 17U is formed at the top of the upper pipe 17 and includes the upper end 17B, forming a substantially inverted U shape in a front view of the seat. That is, the inverted U-shaped portion 17U is formed by the upper end 17B and a vertical pipe portion 17C hanging down from the outer end of the upper end 17B in the seat width direction.

[0022] Fig. 7 shows an exploded perspective view of the hinge portion 10H provided on the base side of the neck pillow 20 (see Fig. 6). Although Fig. 7 shows the hinge portion 10H on the left side in the left-right direction of the seat, the hinge portion 10H on the right side in the left-right direction of the seat has a configuration symmetrical to that in Fig. 7.

[0023] As shown in FIGS. 6 and 7, a mounting bracket 26 is fixed to the vertical pipe portion 17C at a middle portion in the seat up-down direction, on the outer side in the seat width direction. The mounting bracket 26 extends outward in the seat width direction from the portion where the mounting bracket 26 is fixed to the vertical pipe portion 17C. As shown in FIG. 7, a mounting hole 26A is formed in the mounting bracket 26, opening outward in the seat width direction. The mounting hole 26A has a depth direction that corresponds to the seat width direction. A cylindrical pin portion 28A of a torque hinge 28 is inserted into the mounting hole 26A (see arrow X), and the pin portion 28A is attached so that it can rotate around an axis in the seat width direction (see arrow R1). Although not shown, the mounting hole 26A and the pin portion 28A are provided with a retaining mechanism to prevent the pin portion 28A from coming out of the mounting hole 26A. A known mechanism can be used as the retaining mechanism.

[0024] The torque hinge 28 is a shaft-shaped member, disposed with its axis aligned with the seat width direction, and includes a pin portion 28A and a short cylindrical portion 28B that is continuous with the base end of the pin portion 28A and has a larger diameter than the pin portion 28A. The outer end of the short cylindrical portion 28B in the seat width direction is fixed to a side surface of the cylindrical body 32. Additionally, the cylindrical body 32 extends with its cylindrical axis perpendicular to the axial direction of the torque hinge 28, and the outer end of the short cylindrical portion 28B in the seat width direction is fixed to a central portion of the cylindrical body 32 in the cylindrical axis direction. Note that in FIG. 7, the internal configuration of the cylindrical body 32 is shown in a see-through state (similar to FIGS. 8B and 9B) to make the configuration easier to understand.

[0025] Lids 34 are attached to the openings on both axial sides of the cylindrical body 32, and a hole 34A is formed through the center of the lid 34. A coil spring 36 serving as a biasing member and a short cylindrical damper 38 are arranged in series and housed inside the cylindrical body 32. One end of the coil spring 36 is fixed to the lid 34 (or the cylindrical body 32), and the damper 38 is fixed to the cylindrical body 32. A mounting hole 38A is formed through the damper 38 so as to correspond to the central axis of the cylindrical body 32.

[0026] A pivot shaft (sometimes referred to as a rotation shaft) 40 passes through the hole 34A of the lid 34, the inside of the coil spring 36, and the mounting hole 38A of the damper 38 (see FIG. 8B). The pivot shaft 40 is disposed so as to pass through the center of the cylindrical body 32, and is fixed to the other end of the coil spring 36 and attached to the damper 38. The damper 38 has the function of attenuating the biasing force acting on the pivot shaft 40 around its axis (functioning as an axial damper or a rotation damper).

[0027] Both ends of the rotation shaft 40 are fixed to a pair of support pieces 42A of a bent plate material 42. The bent plate material 42 includes a pair of opposing support pieces 42A and a connecting plate portion 42B that linearly connects one end of the pair of support pieces 42A in a direction perpendicular to the plate thickness direction. The side of each of the pair of support pieces 42A opposite to the connection side with the connecting plate portion 42B is formed in a semicircular plate shape. The connecting plate portion 42B is formed in a rectangular shape with the direction connecting the pair of support pieces 42A as the longitudinal direction.

[0028] The above-described cylindrical body 32, lid 34, coil spring 36, damper 38, rotating shaft 40, and bent plate member 42 constitute the rotational spring damper 30. In the rotational spring damper 30, the damper 38 provides a damping effect when the rotating shaft 40 rotates due to the spring force (biasing force) of the coil spring 36.

[0029] One end of a neck pillow stay 44 is fixed to the longitudinal center of the surface of connecting plate 42B opposite to pivot shaft 40. As shown in FIG. 6, neck pillow stay 44 forms the core of neck pillow 20 and is a gently curved, elongated member. This neck pillow stay 44 is, for example, a hollow member (see FIG. 7), but may also be a solid member. Furthermore, neck pillow stay 44 is embedded in a padding material (not shown) covered with skin 20A in neck pillow 20.

[0030] Fig. 8A shows a simplified perspective view of the state of the internal mechanism of the neck pillow 20 when stored, and Fig. 8B shows a perspective view of the state of the hinge portion 10H in the state of Fig. 8A. Also, Fig. 9A shows a simplified perspective view of the state of the internal mechanism of the neck pillow 20 when the neck pillow 20 in the state of Fig. 8A has rotated about an axis in the seat width direction and opened, and Fig. 9B shows a perspective view of the state of the hinge portion 10H in the state of Fig. 9A. Furthermore, Fig. 10A shows a simplified perspective view of the state of the internal mechanism of the neck pillow 20 when the neck pillow 20 in the state of Fig. 9A has rotated about an axis in the seat vertical direction and entered a closed state, and Fig. 10B shows a perspective view of the state of the hinge portion 10H in the state of Fig. 10A. 8B, 9B, and 10B show the hinge portion 10H on the left side in the left-right direction of the seat, but the hinge portion 10H on the right side in the left-right direction of the seat has a configuration symmetrical to that in Figures 8B, 9B, and 10B. Furthermore, Figure 11A shows a simplified schematic plan view of the neck pillow 20 in normal use.

[0031] As shown in Figures 8A to 9B, the pair of left and right pillow components 22, 24 are supported rotatably around an axis in the seat width direction relative to the upper pipe 17 in the seat back 16 of the seat main body 12 by attaching the torque hinge 28 to the mounting bracket 26.

[0032] 9A to 10B, a pair of left and right coil springs 36 are provided on the neck pillow 20 and bias the neck pillow 20 so that the front left portion 22F and the front right portion 24F of the neck pillow 20 come into contact with each other. That is, the coil springs 36 are provided in a pair on the left and right sides corresponding to the pair of left and right pillow components 22, 24 and bias each of the pair of left and right pillow components 22, 24 so as to rotate about their rotation axes 40 in the direction that brings the front left portion 22F and the front right portion 24F into contact with each other (see arrow R2 in FIG. 10B). In this embodiment, a damper 38 is provided, so that the neck pillow 20 does not close forcefully due to the biasing force (spring force) of the coil springs 36.

[0033] By providing the hinge portion 10H described above, the pair of left and right pillow structures 22, 24 are configured to be displaceable between storage positions 22X, 24X that are arranged along the outer shape of both shoulders of the seat back 16 of the seat main body 12 shown in Figure 8A, and usage positions 22Y, 24Y that support the neck P2 of the seated occupant P from the lateral and frontal sides, as shown in Figure 11A.

[0034] (Actions and Effects of the Embodiments) Next, the operation and effect of this embodiment will be described. Note that Figure 11B, which will be referred to as appropriate in the following description, is a schematic plan view showing, in a simplified form, the state of the neck pillow 20 when there is an overload on the left and right sides, and Figure 11C is a schematic plan view showing, in a simplified form, the state of the neck pillow 20 when there is a frontal collision.

[0035] 11A, the neck pillow 20 is capable of supporting the neck P2 of the seated occupant P from the lateral and front sides, and a front left portion 22F, which is located in front of and to the left of the neck P2 of the seated occupant P, and a front right portion 24F, which is located in front of and to the right of the neck P2 of the seated occupant P, are capable of moving toward and away from each other in the seat width direction. Here, the neck pillow 20 is provided with a pair of left and right coil springs 36 (see FIG. 10B), which bias the neck pillow 20 so that the front left portion 22F and the front right portion 24F of the neck pillow 20 come into contact with each other.

[0036] Therefore, when the neck pillow 20 is in use, even if a force acts to displace the head P1 of the seated occupant P toward the front of the seat, if the load acting on the neck P2 of the seated occupant P is not excessive, the front left portion 22F and the front right portion 24F of the neck pillow 20 will prevent the neck P2 of the seated occupant P from being displaced toward the front of the seat, and ultimately will prevent the head P1 of the seated occupant P from being displaced toward the front of the seat.

[0037] With reference to Figures 12A and 12B, a supplementary explanation will be given regarding the suppression of displacement of the head P1 of the seated occupant P in the front-rear direction of the seat. Figure 12A shows a schematic side view of a comparison structure during vehicle deceleration. The comparison structure is a vehicle seat 100 equipped with a neck pillow 102 obtained by removing the front left portion 22F and the front right portion 24F (see Figure 11A, etc.) from the neck pillow 20 according to this embodiment. Figure 12B shows a schematic side view of a vehicle seat 10 equipped with the neck pillow 20 according to this embodiment during vehicle deceleration.

[0038] 12A and 12B, arrow A indicates the acceleration of head P1 during deceleration, and arrow G indicates gravitational acceleration. Also, in FIG. 12A, two-dot chain line L1 indicates the front-to-back axis (head front-to-back axis) of the tilted head P1, and two-dot chain line L2 indicates the up-to-down axis (head up-to-down axis) of the tilted head P1. In FIG. 12B, two-dot chain line L3 indicates the front-to-back axis (head front-to-back axis) of the tilted head P1, and two-dot chain line L4 indicates the up-to-down axis (head up-to-down axis) of the tilted head P1. Although not shown, acceleration A during deceleration shown in FIGS. 12A and 12B can be decomposed into a component in the head front-to-back direction (see L1 and L3) and a component in the head up-to-down direction (see L2 and L4). Gravitational acceleration G can also be decomposed into a component in the head front-to-back direction (see L1 and L3) and a component in the head up-to-down direction (see L2 and L4).

[0039] 12A , there is no support for the neck P2 of the seated occupant P from the front side. Therefore, when the vehicle decelerates, acceleration A in the forward direction of the vehicle causes the trunk (portion including the thorax P3) of the seated occupant P to move away from the seat back 16 and the head P1 to move away from the headrest 18, which may cause the head P1 to tilt forward. This increases the resultant force C1 of the component (component not shown) of the acceleration A in the front-to-back direction of the head (see L1) during deceleration and the component (component not shown) of the gravitational acceleration G in the front-to-back direction of the head (see L1). If this large resultant force C1 in the front-to-back direction of the head (see L1) acts on the head P1 of the seated occupant P, it may cause motion sickness. Furthermore, after the head P1 of the seated occupant P moves away from the headrest 18, a return phenomenon occurs in which the head P1 comes into contact with the headrest 18 again, which may increase the discomfort of the seated occupant P.

[0040] 12B, since there are support portions in the entire circumferential direction for the neck P2 of the seated occupant P, tilting of the upper body PS of the seated occupant P is prevented when the vehicle is cornering (turning), and when acceleration occurs during deceleration, the trunk (portion including the thorax P3) of the seated occupant P is prevented or effectively suppressed from leaving the seat back 16, and the head P1 is prevented or effectively suppressed from leaving the headrest 18. As a result, it is possible to suppress an increase in the resultant force C2 (resultant force in the head front-rear direction) of the component (component force not shown) of the acceleration A in the head front-rear direction (see L3) during deceleration and the component (component force not shown) of the gravitational acceleration G in the head front-rear direction (see L3), and therefore the head P1 of the seated occupant P is prevented from tilting forward due to the inertial force during deceleration, thereby reducing car sickness. Furthermore, since the head P1 can be prevented or effectively suppressed from separating from the headrest 18, the phenomenon of the head P1 returning to contact the headrest 18 again can also be prevented or effectively suppressed, improving the comfort of the seated occupant P.

[0041] In this embodiment, the neck pillow 20 can prevent the head P1 of the seated occupant P from falling left and right and forward, which also improves visibility of an in-vehicle display (not shown) installed in the vehicle cabin.

[0042] 11B and 11C, when the load acting on the neck P2 of the seated occupant P is excessive, the front left portion 22F and the front right portion 24F move apart against the spring force (biasing force) of the coil spring 36 (see FIG. 10B), thereby releasing the support state by the neck pillow 20. In FIG. 11C, the moving direction of the head P1 of the seated occupant P is indicated by an arrow D.

[0043] 11A, each of the pair of left and right pillow components 22, 24 constituting the neck pillow 20 is rotatable about an axis in the up-down direction of the seat, with the side attached to the seat main body 12 as the base side. In order to bias the neck pillow 20 in the closing direction, a pair of left and right coil springs 36 (see FIG. 10B) are provided corresponding to the pair of left and right pillow components 22, 24, and bias each of the pair of left and right pillow components 22, 24 to rotate about its rotation axis 40 in a direction that brings the front left portion 22F and the front right portion 24F into contact with each other. This allows the neck pillow 20 to be stably biased without complicating the structure.

[0044] 8A to 9B, the pair of left and right pillow components 22, 24 are each supported rotatably about an axis in the seat width direction relative to the upper pipe 17 of the seat back 16 of the seat main body 12. The pair of left and right pillow components 22, 24 are displaceable between a storage position 22X, 24X, which is arranged along the outline of both shoulders of the seat back 16 of the seat main body 12, as shown in Fig. 8A, and a use position 22Y, 24Y, which supports the neck P2 of the seated occupant P from the lateral and frontal sides, as shown in Fig. 11A. Therefore, when the neck pillow 20 is not in use, it can be arranged in the storage position 22X, 24X, which is an out-of-the-way position, as shown in Fig. 8A.

[0045] As described above, according to the vehicle seat 10 of this embodiment, as shown in FIG. 11A, the neck pillow 20 can prevent the head P1 of the seated occupant P from being displaced forward, and as shown in FIGS. 11B and 11C, the support state provided by the neck pillow 20 can be effectively released when the load acting on the neck P2 of the seated occupant P is excessive.

[0046] (Supplementary explanation of the embodiment) In the above embodiment, the neck pillow 20 is composed of a pair of pillow components 22, 24 on the left and right sides. However, as a variation of the above embodiment, the neck pillow may be formed continuously without being separated into left and right sides.

[0047] Furthermore, in the above embodiment, as shown in Figures 8A to 9B, the pair of left and right pillow components 22, 24 are each supported to be rotatable about an axis in the seat width direction relative to the upper pipe 17 in the seat back 16 of the seat main body 12, but as a modification of the above embodiment, a configuration can also be adopted in which the pair of left and right pillow components are supported in a state in which they cannot rotate about an axis in the seat width direction relative to the skeleton part of the seat main body.

[0048] Furthermore, in the above embodiment, the pair of left and right pillow components 22, 24 can be displaced to storage positions 22X, 24X that are arranged along the outer contours of both shoulders of the seat back 16 of the seat main body 12 shown in FIG. 8A. However, as a modification of the above embodiment, the pair of left and right pillow components may be configured to be displaceable to storage positions that are arranged along the outer contours of both the left and right sides of the headrest of the seat main body.

[0049] The above-described embodiment and the above-described modifications can be implemented in appropriate combinations.

[0050] Although one example of the present invention has been described above, the present invention is not limited to the above, and it goes without saying that the present invention can be implemented in various modified forms within the scope of the gist of the present invention. [Explanation of symbols]

[0051] 10 Vehicle seats 12 Seat body 17 Upper pipe (framework) 20 Neck Pillow 22 Pillow structure 22F front left 22X Storage position 22Y Usage position 24 Pillow structure 24F front right 24X Storage Position 24Y usage position 36 Coil spring (biasing member) P Seated occupant PS Upper body of seated occupant P2 Neck of seated occupant

Claims

1. a seat body on which an occupant sits and which supports the upper body of the seated occupant; a neck pillow attached to an upper portion of the seat body so as to be able to support the neck of the seated occupant from the sides and the front, and having a front left portion disposed in front of and to the left of the neck of the seated occupant and a front right portion disposed in front of and to the right of the neck of the seated occupant, which are movable toward and away from each other in the seat width direction; a biasing member provided on the neck pillow and biasing the neck pillow with a spring force so that the front left portion and the front right portion of the neck pillow come into contact with each other; A vehicle seat comprising:

2. The neck pillow is composed of a pair of left and right pillow structures, and each of the pair of left and right pillow structures is rotatable around an axis in the seat up-down direction, with the attachment side to the seat main body being a base side, 2. The vehicle seat according to claim 1, wherein the biasing members are provided in a pair on the left and right sides corresponding to the pair of left and right pillow structures, and bias each of the pair of left and right pillow structures to rotate around its rotation axis and toward a side where the front left portion and the front right portion come into contact with each other.

3. 3. The vehicle seat according to claim 2, wherein the pair of left and right pillow structures are each supported rotatably about an axis in the seat width direction relative to a skeleton portion of the seat body, and are configured to be displaceable between a storage position in which they are arranged along the outer shape of the seat body, and a use position in which they support the neck of a seated occupant from the lateral and frontal sides.

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