JP7684591B2 - Vehicle seats - Google Patents

Description

The present invention relates to a vehicle seat, and in particular to a vehicle seat equipped with a neck support that supports the neck of an occupant.

Some vehicle seats are equipped with a neck support that supports the neck of the occupant. The support position of the neck support can be adjusted in the front-rear direction, and it can support the neck by aligning it with the neck of the occupant. In the vehicle seat of Patent Document 1, multiple bags are provided in the width direction within the neck support (called a neck support in Patent Document 1), and the support position can be adjusted by injecting air into the bags to displace them toward the neck.

JP 2018-187977 A

Under normal circumstances, an air-filled bag, such as the neck support in Patent Document 1, can support the neck of an occupant. However, when a rear load is applied from the occupant during a rear-end collision, the support surface that supports the neck of an air-filled bag moves, making it difficult to restrain the neck.

Therefore, the present invention was made in consideration of the above problems, and its purpose is to provide a vehicle seat that can restrain the neck of an occupant when weight is applied by the occupant.

The problem is to provide a vehicle seat comprising a seat back against which an occupant rests, a headrest that is provided on the seat back and whose vertical position can be adjusted, and a neck support that is provided below the headrest and has a neck support surface that supports the neck of the occupant, the neck support being provided with an adjustment mechanism for adjusting the neck support surface, the adjustment mechanism having a protrusion amount adjustment section that adjusts the amount of protrusion of the neck support surface in the front-rear direction, a vertical position adjustment section that adjusts the vertical position of the neck support surface, and a lock section that locks the position of the vertical position adjustment section when a load is applied to the neck support surface from the occupant during a rear-end collision, and the adjustment mechanism is This problem is solved by having a guide member extending in the vertical direction, and a support member that forms the neck support surface and is attached so as to be movable in the vertical direction along the guide member, wherein the support member has a position retaining member that retains the position of an upper end or a lower end of the support member, and the position retaining member is attached to the front side of the guide member so as to be movable in the vertical direction, and the locking portion is provided between the position retaining member and the guide member, and the locking portion is composed of a locking piece that is provided on the position retaining member and is biased toward the guide member, and a plurality of recesses that are formed in the guide member in line in the longitudinal direction of the guide member and into which the locking piece can be inserted .

In the vehicle seat of the present invention configured as described above, when the adjustment mechanism for adjusting the neck support surface receives a load from the occupant on the neck support surface during a rear-end collision, the locking part of the adjustment mechanism locks the position of the up-down position adjustment part, so that the neck support surface does not move and the occupant's neck can be restrained.

Furthermore, by using the guide member to make it possible to move the support member that forms the neck support surface in the vertical direction, it becomes possible to easily adjust the position of the neck support surface in the vertical direction.

Furthermore, since the locking portion is provided between the position retaining member and the guide member, it is possible to protect the locking portion.
Also, the position retaining member can be locked at any position where the recess is formed on the guide member.

In addition, in the above-mentioned vehicle seat, the position retaining member comprises a first position retaining member provided at an upper end of the support member and a second position retaining member provided at a lower end, and the support member may have a biasing member between the first position retaining member and the second position retaining member for biasing the first position retaining member and the second position retaining member toward each other.
By providing a biasing member between the first position maintaining member and the second position maintaining member, an auxiliary force can be obtained when adjusting the position of the support member that forms the neck support surface.

In the vehicle seat described above, the biasing member may be provided at a center portion of the position maintaining member in a seat width direction.
By providing the biasing member at the center of the position retaining member, the biasing force obtained from the biasing member is stable, and the position of the support member can be easily adjusted.

The vehicle seat may further include a shape maintaining member that is provided between the first position maintaining member and the second position maintaining member and supports the support member from behind.
By providing a shape maintaining member that supports the support member from behind, the shape of the support member is maintained and the restraining force for the neck of the occupant is reinforced.

Furthermore, the vehicle seat described above may have a seat back frame that forms the framework of the seat back, and a headrest guide that is provided on the seat back frame and supports a headrest pillar of the headrest, and an upper end of the guide member may be fixed to a front portion of the headrest guide.
The upper end of the guide member is fixed to the front surface of the headrest guide, thereby improving rigidity.

In the vehicle seat described above, an upper end of the guide member may be fixed to a headrest pillar of the headrest.
The guide member is fixed to the headrest pillar, thereby improving the mounting rigidity.
In addition, the above-mentioned vehicle seat may include a seat cushion that supports the buttocks of a front occupant and a seat frame, the seat back and the seat cushion are connected to sandwich a reclining mechanism, the seat frame has a seat back frame that forms the skeleton of the seat back, a seat cushion frame that forms the skeleton of the seat cushion, a headrest frame that forms the skeleton of the headrest, and a neck support frame that forms the skeleton of the neck support, a pad and a cushion trim cover are provided on the outsides of the seat back frame, the seat cushion frame, the headrest frame and the neck support frame, a first pressure-receiving member is attached to the seat back frame so as to be positioned behind the pad that constitutes the seat back, and a second pressure-receiving member is attached to the seat cushion frame, a slide rail is provided on a lower part of the vehicle seat, and the slide rail allows the vehicle seat to be attached to a vehicle floor in a state in which it can slide in the front-rear direction.

According to the vehicle seat of the present invention, when the adjustment mechanism for adjusting the neck support surface receives a load from the occupant on the neck support surface during a rear-end collision, the locking portion of the adjustment mechanism locks the position of the up/down position adjustment portion, so that the neck support surface does not move and the occupant's neck can be restrained.
Furthermore, by using the guide member to make it possible to move the support member that forms the neck support surface in the vertical direction, it becomes possible to easily adjust the position of the neck support surface in the vertical direction.
Furthermore, since the locking portion is provided between the position retaining member and the guide member, it is possible to protect the locking portion.
Furthermore, by providing a biasing member between the first position maintaining member and the second position maintaining member, an auxiliary force can be obtained when adjusting the position of the support member that forms the neck support surface.
Furthermore, by providing the biasing member at the center of the position retaining member, the biasing force obtained from the biasing member is stable, and the position of the support member can be easily adjusted.
Furthermore, by providing a shape maintaining member that supports the support member from behind, the shape of the support member is maintained and the restraining force for the neck of the occupant is reinforced.
Also, the position retaining member can be locked at any position on the guide member where the recess is formed.
Furthermore, by fixing the guide member to the upper frame and the cross member, the mounting rigidity of the guide member is improved.
In addition, the upper end of the guide member is fixed to the front surface of the headrest guide, thereby improving rigidity.
Furthermore, by fixing the guide member to the headrest pillar, the mounting rigidity is improved.

1 is a schematic perspective view of a vehicle seat according to an embodiment of the present invention; 1 is a schematic perspective view showing a seat frame of a vehicle seat; FIG. 2 is a schematic diagram showing a state in which an occupant is seated in a vehicle seat, and shows a state in which a load from the occupant is applied to the vehicle seat and the occupant's back is supported by a neck support or the like. FIG. 2 is a front view of the frame of the neck support. FIG. 2 is a side view of the frame of the neck support. FIG. 11 is a side view of another example of a neck support frame. 6 is a cross-sectional view taken along line VI-VI in FIG. 4 and FIG. 5A. FIG. 4 is a front view showing a seat back frame with a neck support attached thereto. 13 is an explanatory diagram showing the position where the guide member of the neck support is fixed. FIG. 13 is an explanatory diagram showing the position where the guide member of the neck support is fixed. FIG. 13 is an explanatory diagram showing the position where the guide member of the neck support is fixed. FIG. 1 is a schematic perspective view of a vehicle seat having a neck support and an integrated headrest; 10 is a cross-sectional view taken along line XX in FIG. 9.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle seat according to an embodiment of the present invention (hereinafter, referred to as the present embodiment) will be described below with reference to FIGS.
The embodiments described below are merely examples for facilitating understanding of the present invention, and are not intended to limit the present invention. In other words, the shapes, dimensions, arrangements, and the like of the members described below may be modified or improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof. In addition, in the following embodiments, the same or similar components are denoted by common reference symbols, and the scales of the drawings are appropriately changed for ease of understanding.

In the following, a vehicle seat mounted on a vehicle will be taken as an example of a vehicle seat, and an example of its configuration will be described. In the following description, the "front-rear direction" refers to the front-rear direction of the vehicle seat, which coincides with the direction of travel when the vehicle is traveling. The "seat width direction" refers to the width direction of the vehicle seat, which coincides with the left-right direction as seen by an occupant seated in the vehicle seat. The "up-down direction" refers to the up-down direction of the vehicle seat, which coincides with the vertical direction when the vehicle is traveling on a horizontal plane. The term "outside" simply refers to the side closer to the outside in the direction from the center of the vehicle seat alone to the outside, and the term "inside" refers to the side closer to the center in the direction from the outside to the center of the vehicle seat alone.

The shape, position, and posture of each part of the vehicle seat described below will be explained assuming that the vehicle seat is in an occupied position, unless otherwise specified.

<Vehicle seat S>
The basic configuration of a vehicle seat according to this embodiment (hereinafter, vehicle seat S) will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a perspective view of the vehicle seat S, and for convenience of illustration, a cushion trim cover T and a pad P are removed from a part of the vehicle seat S in Fig. 1. Also, arrows in Fig. 1 and Fig. 2 indicate the left-right direction (width direction) and the up-down direction (height direction).

The vehicle seat S is placed on the vehicle body floor and is a seat in which a vehicle occupant H sits. In this embodiment, the vehicle seat S is used as a front seat that corresponds to the front seat of the vehicle. However, this is not limited to this, and the vehicle seat S can also be used as a rear seat, and can also be used as a second-row middle seat or a third-row rear seat in a vehicle that has three rows of seats in the front-to-rear direction.

As shown in FIG. 1, the vehicle seat S mainly comprises a seat back 1, a seat cushion 2, a headrest 3, and a neck support 4. The seat back 1 is a backrest for a seated occupant H, and has a torso support surface 1a that supports the back of the torso H3 of the occupant H. The seat cushion 2 is a seating portion that supports the buttocks of the occupant H. The headrest 3 is disposed on the upper part of the seat back 1, and has a head support surface 3a that supports the head H1 of the occupant H. The neck support 4 is disposed below the headrest 3, and has a neck support surface 4a that supports the neck H2 of the occupant H. The seat back 1 and the seat cushion 2 are connected to sandwich a reclining mechanism 7 (see FIG. 2). The seat back 1 can be rotated by the reclining mechanism 7 to adjust the reclining angle (backrest angle) relative to the seat cushion 2.

<Seat frame F>
2, a seat frame F is provided inside the vehicle seat S, and the seat frame F is composed of a seat back frame 10 that forms the skeleton of the seat back 1, and a seat cushion frame 20 that forms the skeleton of the seat cushion 2. The seat frame F also has a head rest frame 30 that forms the skeleton of the head rest 3, and a neck support frame 40 that forms the skeleton of the neck support 4.
In the following, first, the configuration other than the neck support 4, such as the seat back frame 10, will be described, and the configurations of the neck support 4 and the neck support frame 40 will be described after that.

<Seat back frame 10>
As shown in Fig. 2, the seatback frame 10 is formed in a rectangular frame shape as a whole and includes a pair of backside frames 11 arranged on both sides, an upper frame 12, a cross member 13, and a lower frame 16. The upper frame 12 is arranged between the pair of backside frames 11 and connects upper ends of the backside frames 11. The lower frame 16 is arranged between the pair of backside frames 11 and connects lower ends of the pair of backside frames 11. In addition, a cylindrical headrest guide 17 (see Fig. 3) that supports a headrest pillar 31 is attached to the upper frame 12 of the seatback frame 10.

The pair of back side frames 11 are spaced apart in the left-right direction to define the width of the seat back 1, and are arranged so that both extend in the up-down direction. When the vehicle seat S is in a seatable position, the upper end of each back side frame 11 is located slightly rearward of the lower end. In addition, the lower end of each back side frame 11 is formed wider in the front-rear direction than the upper end.

The upper frame 12 connects the upper ends of a pair of back side frames 11 together, and is formed in an inverted U shape when viewed from the front. The upper frame 12 is formed by bending a steel pipe, and both ends are attached to the upper ends of each back side frame 11. The cross member 13 is installed between the lower ends of the upper frames 12. The cross member 13 is formed as a plate-like member, but may also be a linear member such as a wire. The cross member 13 may also be made of metal or resin.

2 and 7, a pressure-receiving member 15 is provided inside the seat back 1. This pressure-receiving member 15 is a member that receives, at its front side, a load input from the back of the occupant. When a vehicle in which the vehicle seat S is mounted is subjected to a rear-end collision, and a load (impact load) is input from the back of the occupant to the pressure-receiving member 15, the pressure-receiving member 15 is pushed by the back of the occupant and moves (displaces) rearward together with the occupant. This displacement of the pressure-receiving member 15 reduces the load (impact load) applied to the occupant during the collision.
The pressure-receiving member 15 is disposed behind a pad P that constitutes the seat back 1. The pressure-receiving member 15 is disposed in a rectangular space surrounded by the pair of left and right back side frames 11, the cross member 13, and the lower frame 16.

The pressure-receiving member 15 is configured symmetrically with respect to the center in the seat width direction, and as shown in Figures 2 and 7, has an attachment wire 18 and a torso support plate 19. The torso support plate 19 is a part that receives the load from the back of the occupant, and is configured by molding a resin plate into the shape shown in Figures 2 and 7.
The mounting wire 18 functions as a mounting portion for mounting the torso support plate 19 to the seat back frame 10, is formed by bending a metal wire into a predetermined shape, and is assembled to the torso support plate 19. In this embodiment, the mounting wire 18 is molded integrally with the torso support plate 19 by insert molding. That is, a portion of the mounting wire 18 is embedded in a resin plate that constitutes the torso support plate 19.

<Seat cushion frame 20>
The seat cushion frame 20 is formed in a rectangular frame shape, and cushion side frames 21 are provided on the sides thereof. The seat cushion frame 20 also has a cushion pan frame 22 that connects the cushion side frames 21 at the front and a rear connecting frame 23 that connects them at the rear. A plurality of S springs 24 are arranged in the seat width direction between the cushion side frames 21 on both sides as pressure-receiving members that support the buttocks. The S springs 24 extend long in the front-rear direction. The front ends of the S springs 24 are fixed to the upper end surface of the cushion pan frame 22. The rear ends of the S springs 24 are fastened to the rear connecting frame 23 by engagement hooks 26. That is, the S springs 24 are attached to span the cushion pan frame 22 and the rear connecting frame 23, and support the buttocks of the seated occupant H from below.

<Headrest 3>
The headrest 3 is attached to the upper part of the seat back 1 so as to support the head of the occupant H. A headrest frame 30 forming the skeleton of the headrest 3 is provided inside the headrest 3, and two headrest pillars 31 (also called headrest stays) hanging down from the lower part of the headrest 3 are provided on both the left and right ends of the headrest frame 30. The headrest pillars 31 are inserted into headrest guides 17 attached to the upper frame 12 of the seat back frame 10, whereby the headrest 3 is attached to the seat back frame 10.

As shown in FIG. 2, the headrest 3 has a head support plate 33 inside the headrest 3 that receives and supports the head H1 of the occupant H when a rear load acts on the occupant H. The head support plate 33 has an S-shaped cross section.

<Pad P and cushion trim cover T>
A pad P and a cushion trim cover T are provided on the outer sides of the seat back frame 10, the seat cushion frame 20, and the headrest frame 30. The pad P is a urethane base material formed by foam molding using, for example, a urethane foam material, and the cushion trim cover T is made of a skin material such as cloth, synthetic leather, or genuine leather.

<Slide rail 5>
2, a slide rail 5 is provided under the vehicle seat S. The slide rail 5 allows the vehicle seat S to be attached to the vehicle floor in a state in which the vehicle seat S can slide in the front-rear direction. The slide rail 5 has a known structure (the structure of a typical slide rail mechanism) and includes a lower rail fixed to the vehicle floor and an upper rail that can slide relative to the lower rail. The upper rail is slidable relative to the lower rail fixed to the vehicle body.

<Neck support 4>
As described above, the neck support 4 is a member that supports the neck H2 of the occupant H from the rear, and is installed below the headrest 3 as shown in FIG. 1. The neck support 4 of this embodiment has a rectangular parallelepiped main body 50 at the front, and the surface (front end surface) of the main body 50 facing the occupant H forms a neck support surface 4a that supports the neck H2 of the occupant H. The neck support 4 has an upper attachment portion 51 that extends rearward from the upper end of the rectangular parallelepiped main body 50. The main body 50 and the upper attachment portion 51 form an inverted L-shaped vertical cross section of the neck support 4. The neck support 4 has a neck support frame 40 that forms its skeleton, and a pad P and a cushion trim cover T that covers its surface are provided on the outside of the neck support 4. The neck support frame 40 is composed of a pair of guide members 41 provided on both sides and an upper attachment frame 44 that extends rearward from the upper end of the upper attachment frame 44. The rear end of the upper attachment frame 44 is attached to the upper frame 12.

A through hole 51a is formed in the upper mounting portion 51 of the neck support 4. By inserting the headrest guide 17 into this through hole 51a, the upper mounting portion frame 44 of the neck support 4 comes into contact with and is fixed to the upper frame 12. In addition, the headrest pillar 31 of the headrest 3 is inserted into the headrest guide 17, thereby supporting the headrest 3.
The lower end of the guide member 41 is fixed to the cross member 13 as shown in Figures 2 and 7. An upper mounting frame 44 extending from the upper end of the guide member 41 is fixed to the upper frame 12, and the lower end of the guide member 41 is fixed to the cross member 13, thereby improving mounting rigidity. In addition, as shown in Figures 2 and 5, the guide member 41 is disposed forward of the headrest pillar 31. Interference between the guide member 41 and the headrest pillar 31 is suppressed, and the generation of abnormal noise due to contact is suppressed.

The neck support 4 is provided with an adjustment mechanism 52 that adjusts the shape of the neck support surface 4a. The neck support surface 4a has a protrusion 56 that protrudes forward. This protrusion 56 comes into contact with the neck H2 of the occupant H. The adjustment mechanism 52 has a protrusion amount adjustment unit 53 that adjusts the amount of protrusion in the front-rear direction of the protrusion of the neck support surface 4a, and a vertical position adjustment unit 54 that adjusts the vertical position of the protrusion 56 of the neck support surface 4a. The adjustment mechanism 52 also has a lock unit 55 that locks the position of the protrusion 56 adjusted by the vertical position adjustment unit 54 so that it does not change when the neck support surface 4a receives a load from the occupant during a rear-end collision, that is, when the protrusion 56 is pushed backward.

The locking portion 55 does not change the position of the protruding portion 56, so that the neck support surface 4a can restrain the neck H2 of the occupant. As described above, the torso support plate 19 supporting the torso support surface 1a of the seat back 1 restrains the torso H3 of the occupant H, and the head support plate 33 supporting the head support surface 3a of the headrest 3 restrains the head H1 of the occupant. Therefore, as shown in FIG. 3, the head support surface 3a of the headrest 3, the neck support surface 4a, and the torso support surface 1a of the seat back 1 can form a continuous restraint surface that conforms to the shape of the spine, and the vehicle seat S can move the occupant H backward while maintaining the spinal shape of the occupant H in the event of a rear-end collision. When the phenomenon of sinking into the seat occurs, the amount of sinking of the chest of the occupant H is reduced, and the difference between the head and neck is reduced, so that the occupant H is prevented from becoming hunched, and the load acting on the occupant H in the event of a rear-end collision is effectively reduced.

<Adjustment mechanism 52>
The specific internal configuration of the adjustment mechanism 52 of the neck support 4 will be described with reference to Figures 4 to 6. As shown in Figures 4 and 5A, the adjustment mechanism 52 has a pair of guide members 41 extending in the vertical direction of the vehicle seat S, and a neck support plate 42 (support member) that defines the shape of the neck support surface 4a and is attached so as to be movable in the vertical direction along the guide members 41.

<Guide Member 41>
The guide member 41 is an elongated member that guides the neck support plate 42 in the up-down direction. As shown in Fig. 6, grooves 41a extending along the longitudinal direction are formed on both sides of the guide member 41. In addition, a plurality of recesses 47 for locking the position of the neck support plate 42 are formed side by side on the front surface. The position of the end (position retaining member 43) of the neck support plate 42 is fixed by inserting a locking piece 46 of a locking part 55 (described later) into the recesses 47.

<Neck Support Plate 42>
The neck support plate 42 is a plate-like member made of metal. As shown in Fig. 5A, by adjusting the distance L between the upper end and the lower end, the amount of bending of the neck support plate 42 can be changed, and a protrusion 56 of the neck support surface 4a can be formed. For example, by moving a second position retaining member 43B (described later) upward to shorten the distance L, the neck support plate 42 can protrude further forward.
Although the neck support plate 42 is formed from a thin metal plate, it may be formed from a thin resin plate.

<Position retaining member 43>
The neck support plate 42 has a first position retaining member 43A that retains the position of the upper end of the neck support plate 42, and a second position retaining member 43B that retains the position of the lower end.
The first position retaining member 43A and the second position retaining member 43B are attached to the front side of the guide member 41 so as to be vertically movable along the guide member 41.
The first position maintaining member 43A and the second position maintaining member 43B have the same configuration. Therefore, in the following description, unless there is a need to particularly distinguish between the first position maintaining member 43A and the second position maintaining member 43B, they will be simply referred to as "position maintaining member 43."

As shown in Figure 6, the position retaining member 43 has a retaining portion 49 that retains the guide member 41, and by inserting the tip of the retaining portion 49 into the groove 41a of the guide member 41, it is possible to slide in the vertical direction while retaining the guide member 41.
A locking portion 55 that locks the vertical movement of the position maintaining member 43 is provided between the guide member 41 and the position maintaining member 43. By locking the movement of the position maintaining member 43, the vertical position of the neck support plate 42 is locked.

<Lock portion 55>
The locking portion 55 is provided on the holding portion 49 of the position-retaining member 43 and is composed of an engaging piece 46 that is biased toward the guide member 41, and a plurality of recesses 47 that are formed on the front surface of the guide member 41 and into which the engaging piece 46 can be inserted. A plurality of recesses 47 are formed on the front surface of the guide member 41, lined up in the longitudinal direction (up-down direction) of the guide member 41. An inertial lock is formed by the engaging pieces 46 and the recesses 47, and the position-retaining member 43 can be locked at any position on the guide member 41 where the recesses 47 are located. Since the locking portion 55 is provided between the guide member 41 and the position-retaining member 43, it is possible to protect the locking portion 55 in the normal state.
In addition, in addition to the locking structure using the engaging piece 46 and the recess 47, the locking portion 55 may have a structure that locks the position of the position retaining member 43 by inserting a pin into a recess or through hole formed on the side of the holding portion 49 and the guide member 41.

The protrusion amount adjustment unit 53 is realized by a position holding member 43 that fixes the position of the neck support plate 42 and its upper and lower ends to the guide member 41. The vertical position adjustment unit 54 is realized by the position holding member 43 and the guide member 41 that allows its position to be moved up and down.

A spring 45 (biasing member) is provided between the first position retaining member 43A and the second position retaining member 43B to bias them toward each other. In this embodiment, it is configured with a single tension coil spring located in the center, but the biasing spring 45 may be realized with multiple coil springs.

By providing the spring 45, it is possible to obtain an auxiliary force when increasing the amount of protrusion by the neck support plate 42, i.e., when bringing the first position-retaining member 43A and the second position-retaining member 43B closer to each other. In addition, by providing the spring 45 at the center of the position-retaining member 43 in the seat width direction, it is possible to stabilize the biasing force of the spring 45.

<Shape retention member 48>
As shown in Figures 4 and 5A, the shape-maintaining member 48 is provided between the first position-maintaining member 43A and the second position-maintaining member 43B. The upper and lower ends of the shape-maintaining member 48 are rotatably attached to the first position-maintaining member 43A and the second position-maintaining member 43B. The shape-maintaining member 48 is formed so as to be bendable at its vertical center. By reducing the distance L between the first position-maintaining member 43A and the second position-maintaining member 43B, the center of the shape-maintaining member 48 protrudes forward, thereby supporting the neck support plate 42, which curves forward, from behind.
By providing the shape maintaining member 48, the curved neck support plate 42 is supported from behind, reinforcing the restraining force for the neck in the event of a rear-end collision.

<Position of Guide Member 41>
2, 3 and 5A is located in front of the headrest guide 17, and the upper attachment frame 44 extending rearward from the upper end is fixed to the upper frame 12. This is just one example, and as shown in Fig. 5B, the upper attachment frame 44 may be directly fixed to the front surface 17c of the headrest guide 17. This eliminates the need for a through hole 51a for passing the headrest guide 17, making assembly easier.
Also, the width W1 of the neck support may be made smaller than the distance between the pair of headrest guides 17 (see FIG. 8C ), and the upper attachment frame 44 may be fixed to the upper frame 12 avoiding the headrest guides 17. By arranging the upper attachment frame 44 between the pair of headrest guides 17, the guide member 41 can be positioned rearward of the headrest guides 17, which makes it possible to prevent the guide member 41 from becoming large in the front-to-rear direction, and the shortening of the distance to the upper frame 12 improves rigidity.

As shown in FIG. 7, the position of the guide member 41 in the seat width direction is inside the connection portion 18a between the mounting wire 18 and the cross member 13. In other words, the width W1 of the neck support 4 is narrower than the distance (width W2) between the connection portions 18a. By locating the guide member 41 inside the connection portions 18a, it is possible to suppress the generation of abnormal noise caused by contact between the guide member 41 and the mounting wire 18 while suppressing the increase in size of the neck support 4 in the left-right direction.

Also, as shown in FIG. 7, the width W1 of the neck support 4 (the widthwise size of the guide members 41 on the left and right) is formed so that the width W3 of the body support plate 19 is also narrower. This prevents the neck support 4 from becoming too large.

Furthermore, as shown in FIG. 8A , the left and right guide members 41 may be fixed to outer surfaces 17 a of a pair of headrest guides 17 attached to the upper frame 12 .
8B, the guide members 41 on the left and right sides may be fixed to the inner surface 17b of the headrest guide 17. Fixing the guide members 41 to the outer surface or inner surface of the headrest guide 17 improves rigidity.
8C, the width W1 of the neck support 4 may be arranged to be smaller than the width W4 of the inner surfaces of the two headrest guides 17. The guide members 41 are fixed to the upper frame 12. This prevents the device from becoming too large.

Next, a vehicle seat SA according to another embodiment will be described with reference to FIGS.
As shown in Fig. 9, the vehicle seat SA includes a seat back 1A, a seat cushion 2A, a headrest 3A, and a neck support 4A as components. In the vehicle seat S in Fig. 1, the headrest 3 is configured as a separate body from the seat back 1, but the vehicle seat SA differs from the vehicle seat S shown in Fig. 1 in that the headrest 3A is integrated with the seat back 1A. All other points are common to both the vehicle seats.

Since the seat back 1A and the headrest 3A are integrated, as shown in FIG. 10, the headrest frame 30A (more specifically, the headrest pillar 31A) that supports the headrest 3A is fixed directly to the upper frame 12A.

In the vehicle seat SA, the neck support 4A is fixed to the headrest frame 30A. More specifically, the upper mounting frame 44 of the guide member 41 is fixed to the headrest pillar 31A at a position lower than the head support plate 33. The guide member 41 is also fixed to the front side of the upper mounting frame 44. This configuration improves the mounting rigidity of the neck support 4A.

In the vehicle seat SA, the guide member 41 is also fixed to the upper frame 12A via the upper mounting frame 44. This is one example, and the upper end portion of the guide member 41 may be attached to the lower end portion of the head support plate 33 of the headrest 3A. This allows the surfaces of the head support plate 33 and the neck support plate 42 to be continuous, and also reduces the number of parts that make up the vehicle seat SA.

The above describes an embodiment of the present invention with reference to the drawings. Note that the neck support plate 42 and guide member 41 that support the neck are provided on the neck support 4, but they may be provided on the headrest 3 or the seat back 1. In addition, in the above embodiment, a vehicle seat S that is mounted on a vehicle is described as a specific example, but the present invention is not limited to vehicle seats S that are mounted on vehicles that have wheels and run on the ground, such as automobiles and trains, and may also be applied to seats that are mounted on aircraft, ships, and other vehicles that move other than on the ground.

S, SA Vehicle seats (vehicle seats)
REFERENCE SIGNS LIST 1, 1A seat back 1a torso support surface 2, 2A seat cushion 3, 3A headrest 3a head support surface 4, 4A neck support 4a neck support surface 5 slide rail F seat frame T cushion trim cover P pad 10 seat back frame 11 back side frame 12, 12A upper frame 13 cross member 15 pressure receiving member 16 lower frame 17 headrest guide 18 mounting wire 19 torso support plate 20 seat cushion frame 21 cushion side frame 22 cushion pan frame 23 rear connecting frame 24 S spring 26 engagement hook 30 headrest frame 31, 31A headrest pillar 33 head support plate 40 neck support frame 41 guide member 41a groove 42 neck support plate (support member)
43 Position retaining member 43A First position retaining member 43B Second position retaining member 44 Upper mounting frame 45 Spring (biasing member)
46: locking piece 47: recess 48: shape maintaining member 49: retaining portion 50: main body 51: upper mounting portion 52: adjustment mechanism 53: protrusion amount adjustment portion 54: vertical position adjustment portion 55: lock portion 56: protrusion H: occupant H1: head H2: neck H3: torso

Claims (7)

A vehicle seat, comprising:
A seat back for the occupant to rest against;
A headrest that is provided on the seat back and whose vertical position can be adjusted;
a neck support provided below the headrest and having a neck support surface for supporting the neck of the occupant;
The neck support is provided with an adjustment mechanism for adjusting the neck support surface,
The adjustment mechanism includes:
A protrusion amount adjustment unit that adjusts the protrusion amount in the front-rear direction of the neck support surface;
A vertical position adjustment unit that adjusts the vertical position of the neck support surface;
a locking portion that locks the position of the vertical position adjustment portion when a load is applied to the neck support surface from the occupant during a rear collision ,
The adjustment mechanism includes:
A guide member extending in the vertical direction;
A support member that forms the neck support surface and is attached so as to be movable in the up and down direction along the guide member,
The support member has a position retaining member for retaining the position of an upper end portion or a lower end portion of the support member,
The position retaining member is attached to the front side of the guide member so as to be vertically movable,
The lock portion is provided between the position retaining member and the guide member,
A vehicle seat characterized in that the locking portion is composed of a locking piece provided on the position retaining member and biased toward the guide member, and a plurality of recesses formed in the guide member in a line in the longitudinal direction of the guide member, into which the locking piece can be inserted . the position retaining member includes a first position retaining member provided at an upper end of the support member and a second position retaining member provided at a lower end of the support member;
2. The vehicle seat according to claim 1, wherein the support member has a biasing member between the first position maintaining member and the second position maintaining member, the biasing member biasing the first position maintaining member and the second position maintaining member toward each other. 3. The vehicle seat according to claim 2 , wherein the biasing member is provided at a center portion of the position retaining member in a seat width direction. 4. The vehicle seat according to claim 2 or 3, further comprising a shape maintaining member provided between the first position maintaining member and the second position maintaining member, supporting the support member from the rear and maintaining the shape of the support member. a seat back frame that forms a framework of the seat back; and a headrest guide that is provided on the seat back frame and supports a headrest pillar of the headrest,
5. The vehicle seat according to claim 1 , wherein an upper end of the guide member is fixed to a front surface of the headrest guide. 6. The vehicle seat according to claim 1 , wherein an upper end of the guide member is fixed to a headrest pillar of the headrest. The seat cushion supports the buttocks of the front passenger, and the seat frame is provided.
The seat back and the seat cushion are connected to sandwich a reclining mechanism,
The seat frame includes a seat back frame that forms a framework of the seat back;
a seat cushion frame that forms a skeleton of the seat cushion;
A headrest frame that forms a skeleton of the headrest;
A neck support frame that forms a skeleton of the neck support,
A pad and a cushion trim cover are provided on the outer sides of the seat back frame, the seat cushion frame, the headrest frame and the neck support frame,
The seat back has a first pressure-receiving member attached to the seat back frame so as to be disposed behind the pad constituting the seat back,
The seat cushion includes a second pressure-receiving member attached to the seat cushion frame,
A slide rail is provided under the vehicle seat,
7. The vehicle seat according to claim 1, wherein the vehicle seat is attached to a vehicle floor in a state in which the vehicle seat can slide forward and backward by the slide rail .

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