JP2006035964A - Vehicle seat structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat structure that is less affected by a difference in the physique of a seated occupant and can effectively support the occupant's head with a headrest at the time of a rear collision.
SOLUTION: In a vehicle seat structure including a seat back 1 in which a seat back frame 3 is incorporated and a headrest 2 attached to an upper portion of the seat back 1, a sub frame 10 is rotated on the seat back frame 3. The subframe 10 is rotatably mounted via a shaft 11. The subframe 10 is provided on the upper part 10 a, a headrest attaching part 12 to which the headrest 2 is attached, and a pressure receiving part 13 that is provided on the lower part 10 b and receives the occupant's waist K. The headrest mounting portion 11 and the rotating shaft portion 10c provided between the pressure receiving portion 13 and the pressure receiving portion 13 of the subframe 10 are arranged at the height position of the waist portion K of the occupant in the vertical direction. The headrest 2 is configured to move using the movement of the relative position between the lower back K and the seat back 1.
[Selection] Figure 1

Description

  The present invention relates to a vehicle seat structure including a headrest.

A typical vehicle seat includes a seat cushion, a seat back, and a headrest, and the headrest is attached to an upper portion of the seat back so as to support the head of a seated passenger. Further, in the vehicle seat, the headrest is configured to move toward the front of the vehicle and receive the occupant's head at the time of a rear collision in which an impact force of a predetermined value or more acts from the rear of the vehicle. There are some (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-181402

However, in the conventional vehicle seat structure described above, the pressure receiving portion that receives an external load is set at a height position corresponding to the shoulder portion of the seated occupant, so the layout and dimensions of the internal structure of the seat back Due to such restrictions, it was difficult to secure a sufficient installation space for the pressure receiving part. Further, in the conventional vehicle seat structure, a difference occurs in the degree of pressing with respect to the pressure receiving portion due to the difference in the physique of the seated occupant, so that the precious function is not exhibited and is the same as a normal fixed headrest. There was a possibility.
On the other hand, when the lower plate 51 for frame reinforcement is provided at the lower part of the seat back frame 52 as shown in FIG. 9, the pressure receiving portion 52a hits the lower plate 51 of the seat back in the normal layout of the lower plate 51. The stroke could not be secured.

  The present invention has been made in view of such a situation, and its purpose is less affected by the difference in the physique of the occupant to be seated, and the head of the occupant can be effectively supported by the headrest during a rear-end collision. An object is to provide a vehicle seat structure.

  In order to solve the above-described problems of the prior art, the present invention provides a vehicle seat structure including a seat back in which a seat back frame is incorporated and a headrest attached to an upper portion of the seat back. The sub-frame is rotatably mounted via a rotating shaft, and the sub-frame is provided at an upper portion, a headrest attaching portion to which the headrest is attached, and a lower portion, and a pressure receiving pressure that receives a waist portion of an occupant A rotation shaft portion provided between the headrest mounting portion and the pressure receiving portion, and the pressure receiving portion of the subframe is disposed at a height position of the waist of the occupant in the vertical direction, The headrest is configured to move using the movement of the relative position between the occupant's waist and the seat back.

  Further, in the present invention, a lower plate for frame reinforcement is provided at the lower part of the seat back frame, and the lower plate is provided with a through hole through which the pressure receiving portion of the subframe can be passed, The pressure receiving portion of the sub frame is disposed so as to protrude from the through hole of the lower plate toward the occupant side.

  Further, in the present invention, the sub-frame is formed in a quadrangular shape when viewed from the front, and a connecting portion that connects the upper portion and the lower portion of the sub-frame is disposed in the vicinity of both left and right side portions of the seat back frame, The left and right sides of the back frame are provided with brackets that extend to the rear side of the vehicle and attach the rotation shaft, and the rotation shaft is disposed on the rear side in the vehicle front-rear direction with respect to the seat back frame in a side view. Has been.

  In the present invention, the subframe is formed using a pipe, and a pressure receiving plate is provided on the passenger side of the pressure receiving portion of the subframe.

  As described above, the vehicle seat structure according to the present invention includes a seat back in which a seat back frame is incorporated, and a headrest attached to an upper portion of the seat back, and the seat back frame includes: A subframe is rotatably attached via a rotation shaft, the subframe is provided at an upper portion, a headrest attachment portion to which the headrest is attached, a pressure receiving portion provided at a lower portion and receiving a waist of an occupant, A rotation shaft portion provided between the headrest mounting portion and the pressure receiving portion, and the pressure receiving portion of the subframe is disposed at a height position of the occupant's waist in the vertical direction. Since the headrest is configured to move using the movement of the relative position between the seat and the seat back, the influence of the physique difference of the seated occupant is reduced. Kusuru it becomes possible, and it is possible to the head of the occupant is effectively supported by the headrest to the rear-end collision. In addition, since the pressure receiving portion of the subframe is located near the center of gravity of the occupant's body, it is possible to stably receive a reliable pressing force, and the headrest can be operated reliably and stably. Further, since the pressure receiving portion of the subframe is provided in the lower portion of the seat back having a relatively space, the layout becomes easy. In addition, the pressure receiving part of the subframe is at a height position corresponding to the waist of the seated occupant, and there is little foreign object feeling to the occupant, so a cushion between the pressure receiving part and the occupant can be formed thinly, The pressure receiving portion can receive the movement of the occupant relatively directly.

  Further, in the present invention, a lower plate for frame reinforcement is provided at the lower part of the seat back frame, and the lower plate is provided with a through hole through which the pressure receiving portion of the subframe can be passed, Since the pressure receiving portion of the subframe is disposed so as to protrude from the through hole of the lower plate toward the occupant side, interference between the pressure receiving portion of the subframe and the lower plate can be avoided and a sufficient stroke can be ensured. it can. In particular, it is important to earn a stroke because the pressure receiving portion of the sub-frame is disposed below the seat back frame, and the effect of the lever ratio is greatly related to the movement of the headrest.

  Further, in the present invention, the sub-frame is formed in a quadrangular shape when viewed from the front, and a connecting portion that connects the upper portion and the lower portion of the sub-frame is disposed in the vicinity of both left and right side portions of the seat back frame, The left and right sides of the back frame are provided with brackets that extend to the rear side of the vehicle and attach the rotation shaft, and the rotation shaft is disposed on the rear side in the vehicle front-rear direction with respect to the seat back frame in a side view. As a result, the subframe, including the pivot shaft, is located behind the seat back frame within the range of contact with the seated occupant's back, and the subframe and bracket of the pivot shaft give the passenger a sense of foreign objects. It does not give a bad influence on the ride comfort. The vicinity of the headrest mounting part at the top of the subframe is a structure that does not contact the back of the seated occupant, so it is placed in front of the seatback frame, and the headrest moves backward in normal use. It is regulated by contacting the back frame.

  In the present invention, the sub-frame is formed using a pipe, and a pressure-receiving plate is provided on the passenger side of the pressure-receiving portion of the sub-frame. And the movement of the occupant can be more reliably received by the pressure receiving plate. In addition, since the pressure receiving area for the occupant can be increased, the surface pressure can be reduced, and the occupant's feeling of foreign objects during normal use and the burden on the occupant's waist during operation of the headrest can be reduced. it can. In addition, by configuring the pressure receiving plate so as to be detachable from the subframe, it is possible to provide a pressure receiving plate having a size larger than the through hole of the lower plate, and as a result, the through hole of the lower plate is made smaller. It is also possible to suppress the lowering of the rigidity of the lower plate due to the drilling of holes.

  Hereinafter, the present invention will be described in detail based on illustrated embodiments.

  1 to 3 show a first embodiment of a vehicle seat structure according to the present invention. As shown in FIGS. 1 to 3, the vehicle seat to which the seat structure of the present embodiment is applied includes a seat back 1 that receives the back of the seated occupant and a headrest 2 that supports the head of the seated occupant. The seat back 1 is supported via a reclining device (not shown) so that the angle of the seat back 1 can be adjusted with respect to a seat cushion (not shown). The seat back 1 and the headrest 2 are formed separately, and the headrest 2 is configured to be attached to the upper portion of the seat back 1. The seat back 1 has a structure in which a urethane pad 1a and a seat skin 1b (see FIGS. 5 and 6) that cover a seat back frame and the like described later are provided.

  Further, the seat back 1 incorporates a seat back frame 3 as a core material. As shown in FIGS. 1 and 2, the seat back frame 3 is located at the upper part and is composed of an upper frame 4 made of inverted U-shaped pipes, and side brackets 5 made of steel plates and located on both left and right sides. A plurality of S springs 6 and reinforcing members 7 for supporting the occupant's body and improving the riding comfort are stretched over the side bracket 5 at intervals in the vertical direction. ing. In addition, a lower plate 8 for frame reinforcement is provided at the lower portion of the seat back frame 3. The lower plate 8 is disposed between the lowermost S spring 6 and the reinforcing member 7, and the left and right ends thereof are respectively attached to the side brackets 5 of the seat back frame 3. In addition, a through hole 9 is provided at the center of the lower plate 8 through which a pressure receiving portion (described later) of a subframe, which is a characteristic part of the present invention, can be passed while securing a conventional frame structure. Yes. For this reason, the through hole 9 is formed in a long hole shape extending in the vehicle width direction (left-right direction).

  On the other hand, as shown in FIG. 1, the sub-frame 10 is rotatably attached to the seat back frame 3 according to the first embodiment of the present invention via a rotation shaft 11 as a support point. The sub-frame 10 is formed in a quadrangular shape in front view using a pipe, is provided on the upper part 10a, and is provided on a pair of left and right headrest attaching parts 12 to which the headrest 2 is attached, and on the lower part 10b. The pressure receiving portion 13 that receives the waist portion K (see FIG. 3), and the left and right rotations that are provided between the top and bottom of the headrest mounting portion 12 and the pressure receiving portion 13 and serve as connecting portions that connect the upper and lower portions 10a and 10b at the left and right ends. And a moving shaft portion 10c. The rotation shaft portion 10 c of the sub frame 10 is disposed in the vicinity of the upper frame 4 and the side bracket 5 that are located on both the left and right sides of the seat back frame 3.

Further, as shown in FIGS. 1 and 2, the upper frame 4 positioned on the left and right side portions of the seat back frame 3 is provided with a support bracket 14 that extends to the rear side of the vehicle and attaches the rotating shaft 11. Therefore, as shown in FIG. 2, the rotation shaft 11 is disposed rearward in the vehicle front-rear direction with respect to the seat back frame 3 in a side view. Therefore, the subframe 10 is disposed on the rear side with respect to the seatback frame 3 including the vicinity of the rotating shaft 11 and the support bracket 14 in a range in which the seated passenger comes into contact with the back.
Although not shown, it is preferable that a cushioning material or the like for preventing abnormal noise is disposed between the vicinity of the headrest mounting portion 12 and the seatback frame 3. Furthermore, it is preferable that the subframe 10 is urged by a spring or the like in order to reliably position the subframe 10.

  The pressure receiving portion 13 of the subframe 10 is disposed at a height position corresponding to the occupant's waist K in the vertical direction, and by using the movement of the relative position between the occupant's waist K and the seat back 1, The headrest 2 attached to the portion 12 is configured to move as the subframe 10 rotates. For this reason, the pressure receiving portion 13 has a straight portion extending in the vehicle width direction by bending an intermediate portion in the vehicle width direction of the lower portion 10b of the subframe 10 toward the occupant side (vehicle front side). It is formed in a hat shape as viewed, and is provided so as to protrude from the occupant side by being inserted from the through hole 9 of the lower plate 8. That is, in the subframe 10, the pressure receiving portion 13 is disposed on the vehicle front side with respect to the basic surface 8a of the lower plate 8, and the other portions are disposed on the vehicle rear side.

  In the present embodiment, a stopper (not shown) is separately provided on the support bracket 14 or the like, so that the headrest 2 stops at a necessary position and the amount of movement forward of the vehicle is restricted.

  On the other hand, a pair of left and right support posts 15 are provided below the headrest 2 at intervals corresponding to the headrest mounting portion 12 of the subframe 10. Therefore, as shown in FIG. 3, the headrest 2 protrudes over a predetermined height from the upper surface of the seat back 1 by fixing the pair of left and right support posts 15 by inserting them into the corresponding headrest mounting portions 12. In this state, it can be attached to the subframe 10.

In the vehicle seat structure according to the first embodiment of the present invention, when the vehicle is rearwardly bumped, the occupant tries to stay in place with inertial force, whereas the seat back in the normal state shown in FIG. As shown in FIG. 3 (b), as the vehicle 1 moves, the height position of the waist K relative to the seat back 1 has little difference due to the physique difference of the seated occupant, so the waist of the seated occupant K presses the pressure receiving portion 13 of the subframe 10 to the rear of the vehicle via the urethane pad 1a in the seat back 1. Then, the subframe 10 rotates counterclockwise around the rotation axis 11 of the support point. Then, the headrest 2 attached to the headrest attachment portion 12 of the subframe 10 moves forward of the vehicle as shown by the solid line from the chain line in FIG. As a result, the headrest 2 that has moved to the front of the vehicle is supported from the rear of the vehicle in order to stabilize the head of the passenger.
Further, in the vehicle seat structure according to the first embodiment of the present invention, when the movement amount of the seated occupant's waist K exceeds a certain amount, the lower plate 8 receives a load. As a result, the amount of movement of the waist K is also restricted, so that the subframe 10 is not pressed by an excessive force.

4-7 has shown 2nd Embodiment of the vehicle seat structure which concerns on this invention, The same code | symbol is attached | subjected to the same site | part as the said 1st Embodiment, and description is abbreviate | omitted.
The vehicle seat structure according to the second embodiment of the present invention is different from that of the first embodiment in that a pressure receiving plate 16 is additionally provided on the passenger side of the pressure receiving portion 13 of the subframe 10. . The pressure receiving plate 16 is provided in order to increase the pressure receiving area for the occupant and secure the pressure receiving portion 13 widely. Therefore, as shown in FIGS. 4 and 5, the pressure receiving plate 16 in the second embodiment of the present invention has a vertical width larger than the outer diameter of the pressure receiving portion 13 and the left-right direction so as to cover the passenger side of the pressure receiving portion 13. Is formed larger than the length of the pressure receiving portion 13, and is joined to the front side of the pressure receiving portion 13.

In the vehicle seat structure according to the second embodiment of the present invention, when the vehicle is rearwardly impacted, the seat back 1 in the normal state shown in FIG. 7A moves relative to the occupant toward the front of the vehicle. Accordingly, as shown in FIG. 7 (b), the height position of the waist K relative to the seat back 1 is not significantly different due to the difference in the physique of the seated occupant. The pressure receiving plate 16 and the pressure receiving portion 13 of the sub frame 10 are pressed rearward through the urethane pad 1a (in the direction of arrow F in the figure). Then, the subframe 10 rotates counterclockwise around the rotation axis 11 of the support point. Then, the headrest 2 attached to the headrest attachment portion 12 of the subframe 10 moves forward of the vehicle as shown by the solid line from the chain line in FIG. As a result, the headrest 2 that has moved to the front of the vehicle is supported from the rear of the vehicle in order to stabilize the head of the passenger.
Further, in the vehicle seat structure of the second embodiment of the present invention, when the amount of movement of the seated occupant's waist K exceeds a certain amount, the pressure receiving plate 16 hits the lower plate 8 and a load is applied to the lower plate 8. Will receive. As a result, the amount of movement of the waist K is also restricted, so that the subframe 10 is not pressed by an excessive force.
Therefore, according to the vehicle seat structure of the second embodiment of the present invention, the presence of the pressure receiving plate 16 makes it possible to reduce the surface pressure, reduce the sensation of foreign objects to the passenger during normal use, and operate the headrest 2 It is possible to reduce the burden on the waist K of the passenger at the time.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention.

  For example, in the above-described embodiment, the lower plate 8 is provided at the lower portion of the seat back frame 3, but the lower plate 8 may not be provided depending on the frame structure of the vehicle seat to be applied. Further, the pressure receiving plate 16 can be configured to be detachable from the pressure receiving portion 13 of the sub-frame 10 as shown in FIG. For this reason, a mounting portion 16 a having a C-shaped cross section corresponding to the pressure receiving portion 13 of the subframe 10 is integrally formed on the rear surface of the pressure receiving plate 16, and the mounting portion 16 a is fitted to the pressure receiving portion 13 of the subframe 10. The pressure receiving plate 16 is configured to be attached to and detached from the subframe 10 by being combined or removed from the pressure receiving portion 13. Thereby, the pressure receiving plate 16 having a size larger than the through hole 9 of the lower plate 8 can be provided. Therefore, the through hole 9 of the lower plate 8 can be formed small, and the lowering of the rigidity of the lower plate 8 caused by the presence of the through hole 9 can be suppressed.

1 is a perspective view showing a seat back frame and a sub frame to which a vehicle seat structure according to a first embodiment of the present invention is applied. It is a side view which shows the seat back frame and sub-frame in FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is for demonstrating schematically the operation | movement relationship between the sub-frame which concerns on 1st Embodiment of this invention, and a headrest, (a) is a side view which shows the state at the time of normal, (b) is the state at the time of operation | movement. FIG. It is a side view which shows the seat back frame and sub-frame to which the vehicle seat structure which concerns on 2nd Embodiment of this invention was applied. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is for demonstrating schematically the operation | movement relationship between the sub-frame and headrest which concern on 2nd Embodiment of this invention, (a) is a side view which shows the state at the time of normal, (b) is the state at the time of operation | movement. FIG. The pressure receiving part and pressure receiving plate of the sub-frame which concern on the modification of embodiment of this invention are shown, (a) is sectional drawing which shows the state which attached the pressure receiving plate to the pressure receiving part of the sub frame so that attachment or detachment was possible, (b). FIG. 4 is a cross-sectional view showing a state where a pressure receiving plate is removed from a pressure receiving portion of a subframe. When a lower plate is provided, it is a schematic diagram for explaining a problem when a pressure receiving portion of a subframe is provided with a conventional vehicle seat structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat back 2 Headrest 3 Seat back frame 8 Lower plate 9 Through hole 10 Sub frame 10a Upper part 10b Lower part 10c Rotating shaft part 11 Rotating shaft 12 Headrest attaching part 13 Pressure receiving part 14 Support bracket 15 Support post 16 Pressure receiving plate K waist

Claims (4)

In a vehicle seat structure including a seat back with a built-in seat back frame and a headrest attached to an upper portion of the seat back, a sub frame is rotatable on the seat back frame via a rotation shaft. The sub-frame is provided at the upper part, the headrest attaching part to which the headrest is attached, the lower part, a pressure receiving part for receiving the waist of the occupant, and between the headrest attaching part and the pressure receiving part. The pressure receiving portion of the sub-frame is disposed at a height position of the occupant's waist in the vertical direction, and uses the movement of the relative position between the occupant's waist and the seat back. A vehicle seat structure, wherein the headrest is configured to move. A lower plate for frame reinforcement is provided at a lower portion of the seat back frame, and a through hole through which the pressure receiving portion of the sub frame can be passed is provided in the lower plate, and the pressure receiving portion of the sub frame The vehicle seat structure according to claim 1, wherein the vehicle seat structure projects from the through hole of the lower plate toward the occupant side. The sub-frame is formed in a quadrangular shape when viewed from the front, and connecting portions that connect the upper and lower portions of the sub-frame are disposed in the vicinity of both the left and right sides of the seat back frame, Is provided with a bracket that extends to the rear side of the vehicle and attaches the pivot shaft, and the pivot shaft is disposed on the rear side in the vehicle front-rear direction with respect to the seatback frame in a side view. The vehicle seat structure according to claim 2. The vehicle seat structure according to claim 3, wherein the subframe is formed using a pipe, and a pressure receiving plate is provided on a passenger side of the pressure receiving portion of the subframe.

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