JP2016052806A - Automobile seat cushion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automobile seat cushion which is easy for a sitter to feel relaxed mentally.SOLUTION: This invention, which is an automobile seat cushion mounted on an automobile seat, comprises a seat part mounted on the seating face to keep sitter's buttocks in contact, and a back part that keeps a sitter's back in contact, and is characterized in that the surface of the back is shaped in a curve recessed in the width direction at a trunk corresponding part where the sitter's trunk comes in contact, and in an inclination toward the back face above in vertical directions to be provided nearly perpendicular in vertical directions. It is preferable that the surface of the back is shaped in a curve recessed in the width direction at a scapula corresponding part, and that the recessed form of the trunk corresponding part is deeper than the recessed form of the scapula corresponding part. It is preferable that the width of the back is narrower than the width of the back of the trunk corresponding part. It is preferable that the surface of the seat part is shaped in a curve recessed both in the width direction and in back and forth directions at an ischium corresponding part where the sitter's ischium comes in contact.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an automobile seat cushion.

  The automobile seat cushion is placed on the automobile seat. None of the conventional cushions for automobile seats is intended to relieve the driver's mental stress.

  As a sitting position holding device that suppresses the collapse of the driver's left-right posture, a device described in JP 2012-45098 A is known. The sitting position holding device described in this gazette is provided with a substantially horizontal scapula assist ridge on the portion that contacts the scapula of the driver, and this scapula assist ridge suppresses the collapse of the upper body in the lateral direction of the driver. To do.

  As described above, the sitting position holding device described in the above publication can suppress the collapse of the posture, but does not relieve the driver's mental stress.

JP 2012-45098 A

  As a result of earnestly examining the relationship between the driver's posture during driving and the driver's mental stress, the present inventor found that the driver is in the upper body (upper thoracic vertebrae, ribs and scapula lines). Since the posture is slightly forward tilted, it was found that there was a gap between the shoulder blade and the back of the seat, which caused the driver to feel unstable.

  An object of the present invention is to intensively study the surface shape of the back, and to provide a cushion for an automobile seat in which a seated person can be mentally relaxed.

A cushion for an automobile seat according to the present invention made to solve the above problems is as follows.
A cushion for an automobile seat placed on an automobile seat,
A seat that is placed on the seat surface and abuts on the buttocks of the seated person, and a back that abuts on the back of the seated person,
The back part is curved in a concave shape in the width direction at the body-corresponding portion where the seated person's torso abuts, and the upper part in the vertical direction is inclined to the back side. It has a surface shape that is vertical.

  In the automobile seat cushion, by being placed on the automobile seat, when a seated person sits on the automobile seat cushion, the surface shape of the back portion corresponding to the trunk portion is curved in the widthwise concave shape. Since the upper part in the vertical direction is inclined toward the rear side, the torso of the seated person can easily fit into the back. And, in the automobile seat cushion, since the surface shape of the portion corresponding to the scapula of the back is arranged substantially vertically, the vicinity of the upper scapula of the waist that is stably stored as described above Tends to be in contact with the back, and a gap is unlikely to occur between the vicinity of the scapula of the seated person and the automobile seat cushion. Especially for a seated person who looks at the front like a driver, for example, the upper part of the upper body (upper thoracic vertebrae, ribs and scapula lines) tends to be slightly forward tilted, but as mentioned above, The abutment on the back gives the driver a mental sense of security, which makes it easier for the seated person to relax mentally. Note that “substantially vertical in the vertical direction” means that the portion corresponding to the scapula is substantially perpendicular to the horizontal direction, and no external force is applied when the bicycle seat cushion is placed on a horizontal surface. The angle between the scapula-equivalent part and the horizontal is 85 ° to 100 °, preferably 90 ° to 95 °.

  In the automotive seat cushion, the surface shape of the back portion is curved in a widthwise concave shape at the scapula equivalent portion, and the concave portion of the trunk equivalent portion is deeper than the concave shape of the scapular equivalent portion. preferable. As described above, since the portion corresponding to the scapula has a concave surface shape in the width direction, it is possible to suppress the shake of the posture of the seated person. In addition, since the concave shape of the part corresponding to the scapula is shallower than the concave part of the part corresponding to the torso, the seated person is less likely to be pressed by the back near the scapula, thus increasing the mental security given to the driver. be able to. The concave depth means a difference between the deepest portion and the highest portion in the cross section.

  In the cushion for an automobile seat, it is preferable that the width of the back portion in the portion corresponding to the scapula is narrower than the width of the back portion in the portion corresponding to the trunk. Thereby, the seated person is less likely to receive a feeling of pressure from the back around the shoulder, and the mental security given to the driver can be enhanced.

  In the automobile seat cushion, it is preferable that the surface shape of the seat portion is curved in a concave shape in both the width direction and the front-rear direction at a portion corresponding to the sciatic abutment of the seated person's sciata. As a result, the sciatic bone of the seated person's buttocks easily fits into the sciatic equivalent part of the seat, so that the seated person's torso and scapulae are accurately positioned in the back torso equivalent part and scapula equivalent part. It's easy to do.

  In the automobile seat cushion, for example, the seat portion and the back portion may be configured separately, and the seat portion and the back portion may be respectively attached to the automobile seat. In the cushion, it is preferable that the seat portion and the back portion are integrally formed. As a result, the automobile seat cushion can be easily attached to the automobile seat, and the seat and the back are easily positioned accurately when the automobile seat cushion is attached.

  Thus, when the seat part and the back part are formed integrally, it is preferable that the seat part has a surface shape that is curved in the width direction concave shape on the back side and continues to the back part surface. As a result, the back part of the seat can hold the buttock behind the seated person's scapula so as to wrap it, maintain the seated person's posture accurately, and give the seated person a mental security. Can be increased.

  Moreover, it is preferable that the said back part has the surface shape which curves in the width direction concave shape in the lower part, and follows the said seat part surface. Accordingly, the lower part of the back part can be held so as to wrap up the upper part of the buttocks of the seated person (and the lower part of the lower back part), the posture of the seated person can be accurately maintained, and the mental security given to the seated person can be enhanced.

  Furthermore, it is preferable that an angle formed between the seat portion and the back portion in a side view is 95 ° or more and 110 ° or less. Thereby, it is possible to easily and reliably place the automobile seat cushion on the automobile seat. The angle between the seat part and the back part as viewed from the side is the angle of the virtual placement surface on which the seat part is placed, and a state in which no other external force is applied when the seat part is placed on the virtual placement surface. It means the difference from the average angle of the back part. The average angle of the back means the average value of the inclination angle of the back surface in the cross-sectional shape at the center in the width direction.

  As described above, the cushion for an automobile seat according to the present invention makes it easy for the seated person to relax mentally because the back part abuts on the shoulder blade of the seated person, so that the seated person can be mentally relaxed.

1 is a schematic perspective view of an automobile seat cushion according to an embodiment of the present invention. It is a schematic front view of the cushion for motor vehicle seats of FIG. FIG. 2 is a schematic plan view of the automobile seat cushion of FIG. 1. It is a schematic side view of the cushion for motor vehicle seats of FIG. It is the sectional view on the AA line in FIG. FIG. 4 is a sectional view taken along line BB in FIG. 3. It is CC sectional view taken on the line in FIG. It is the DD sectional view taken on the line in FIG. It is the EE sectional view taken on the line in FIG. It is the FF sectional view taken on the line in FIG.

  Hereinafter, as one embodiment of the present invention, a cushion for an automobile seat that is placed on a seat of a driver's seat and on which a driver (a seated person) sits will be described with reference to the drawings.

<Overall configuration>
The cushion for automobile seats of the present embodiment has a cushion body 1 having cushioning properties (elasticity), and further has a cover (not shown) that covers the cushion body 1. Here, the cushion body 1 is not particularly limited, but is made of a foamed resin such as urethane foam.

  The automobile seat cushion (cushion main body 1) is placed on the seat surface of the automobile seat so that the driver's buttocks abuts against the seat 10 and the backrest of the automobile seat against the driver's back. And a back portion 20 to be contacted.

  The seat part 10 and the back part 20 are integrally formed as shown in FIGS. As described above, the cushion body 1 is made of an elastic member. Therefore, when the automobile seat cushion is placed on the automobile seat, the cushion body 1 is deformed according to the shape of the automobile seat, and the seat portion 10 and the back portion 20 are deformed. The angle formed by is changed. Therefore, the vehicle seat cushion can be accurately placed on the vehicle seat.

  In addition, as a minimum of the angle which the seat part 10 and the back part 20 make side view, 95 degrees is preferable and 100 degrees is more preferable. The upper limit of the angle between the seat 10 and the back 20 as viewed from the side is preferably 110 °, and more preferably 105 °. When the angle formed between the seat portion 10 and the back portion 20 in a side view is within the above range, the vehicle seat cushion can be easily and reliably placed on the vehicle seat. The angle formed by the side view of the seat portion 10 and the back portion 20 means an angle in a state where the seat portion 10 is not placed on the seat of the automobile, that is, a state where no other external force is applied. When 10 is mounted on a horizontal virtual mounting surface, it means an angle formed by the average angle of the back 20 in a state where no other external force is applied to the horizontal plane. In addition, the average angle of the back part 20 means the average value of the inclination angle of the surface of the back part 20 in the cross-sectional shape of the center in the width direction.

  It is possible to form the cushion body 1 by separately molding the seat portion 10 and the back portion 20 after being molded separately, but the cushion body 1 is formed by integrally molding the back portion 20 and the seat portion 10. It is preferable that Thereby, the cushion main body 1 can be manufactured easily and reliably.

  The said seat part 10 and the back part 20 have the surface shape which is a continuous three-dimensional curved surface, and hereafter, the structure of the seat part 10 and the back part 20 is explained in full detail.

<Seat>
As shown in FIGS. 5, 6, and 8, the surface shape of the seat portion 10 is concavely curved in both the width direction and the front-rear direction at the ischial region 11. Here, the sciatic equivalent part 11 means a part where the driver's sciatic abuts, and specifically means a part located at the lowest part of the surface of the seat part 10 where the driver's buttocks abuts. .

  The maximum width W1 (see FIG. 3) of the seat portion 10 is not particularly limited, but is 427 mm in the present embodiment. As a minimum of average width of seat part 10, 300 mm is preferred, 350 mm is more preferred, and 400 mm is still more preferred. As an upper limit of the average width of the seat part 10, 550 mm is preferable, 500 mm is more preferable, and 450 mm is more preferable. When the average lateral width of the seat portion 10 is within the above range, the seat portion 10 can be easily placed on the seat surface of the vehicle seat, and the driver can easily sit on the seat portion 10 placed. In particular, since the average width of the seat portion 10 is equal to or greater than the above lower limit, the driver can easily and smoothly move his / her foot while driving.

  The depth direction length L1 of the seat portion 10 (the length from the rearmost surface to the front end of the seat portion 10 (see FIG. 4)) is not particularly limited, but the lower limit of the depth direction length L1 of the seat portion 10 is as follows. 350 mm is preferable, 400 mm is more preferable, and 450 mm is more preferable. The upper limit of the length L1 of the seat portion 10 is preferably 550 mm, more preferably 520 mm, and further preferably 500 mm. Since the depth direction length L1 of the seat portion 10 is within the above range, the seat portion 10 can be easily placed on the seat surface of the vehicle seat, and the driver can easily and reliably place the seat portion 10 on the seat. I can sit down.

  The distance L2 between the sciatic equivalent portion 11 and the front end of the seat portion 10 is not particularly limited. However, as a lower limit of the ratio of the distance L2 between the sciatic equivalent portion 11 and the front end of the seat portion 10 to the depth direction length L1 of the seat portion 10. Is preferably 0.6 and more preferably 0.7. The upper limit of the ratio of the distance L2 between the sciatic region 11 and the front end of the seat 10 with respect to the length L1 in the depth direction of the seat 10 is preferably 0.8 and more preferably 0.75. The ratio of the distance L2 between the sciatic portion 11 and the front end of the seat portion 10 with respect to the length L1 of the seat portion 10 in the depth direction is within the above range, so that the driver's sciatic bone is easily located in the sciatic portion 11 accurately. .

  The seat 10 is curved in a concave shape in the width direction as described above in the ischial region 11 (see FIG. 8). The depth D1 of the sciatic equivalent region 11 (upper and lower difference from the upper surface of the side edge in the width direction of the sciatic equivalent region 11) is not particularly limited, but the lower limit of the depth D1 of the sciatic equivalent region 11 is preferably 15 mm, 20 mm is more preferable, and 24 mm is more preferable. The upper limit of the depth D1 of the sciatic bone equivalent region 11 is preferably 40 mm, more preferably 30 mm, and even more preferably 28 mm. When the depth D1 of the sciatic equivalent region 11 is within the above range, the driver's sciatic can easily fit into the sciatic equivalent region 11 accurately. In addition, 10b is a side surface of the seat part 10 in drawing.

  The surface shape of the seat portion 10 on the back side of the sciatic bone equivalent portion 11 is a curved surface in which the back side is inclined upward so as to be continuous with the back portion 20. That is, the seat portion 10 has a surface shape that is curved in the widthwise concave shape on the back side and is continuous with the surface of the back portion 20.

  As for the surface shape of the seat part 10 in front of the sciatic bone equivalent part 11, the front side is inclined upward (slightly). That is, the surface shape of the portion 11 corresponding to the sciatica is curved in a concave manner also in the front-rear direction. Note that the forward inclination angle of the sciatic equivalent region 11 is smaller than the inclination angle of the back side of the sciatic equivalent region 11.

  The seat portion 10 has a ridge portion 13 provided at the center in the width direction of the seat portion 10 from the front to the front end rather than the sciatic bone equivalent portion 11, and a pair of ridge portions 14 formed on the left and right sides of the ridge portion 13. (Refer to FIGS. 5 to 8). As shown in FIGS. 7 and 8, the ridge 13 and the pair of ridges 14 have surface shapes that are continuous in the width direction. For this reason, the thigh part of a driver | operator's leg is easy to fit in the said recessed strip part 14. FIG.

  As shown in FIGS. 5 and 6, the ridge 13 and the ridge 14 are formed in a shape having the highest point in the middle from the rear to the front, that is, the ridge 13 and the ridge 14. The surface shape is curved in a convex shape in the front-rear direction. In other words, the ridges 13 and the ridges 14 are provided with the front inclined downward on the front end 10a side from the highest point. For this reason, even if the driver's thigh part is housed in the concave strip portion 14, the front side of the thigh portion is not easily regulated by the convex strip portion 13 and the concave strip portion 14, and the motion of the foot can be performed smoothly.

  In addition, the seat portion 10 has a bottom surface 10c (back surface) that is curved downward and convex in both the width direction and the front-rear direction (see FIGS. 2 and 4 to 8). Specifically, as shown in FIGS. 2, 7, and 8, the bottom surface 10 c of the seat portion 10 has a flat (horizontal) center in the width direction and both sides are inclined upward. Further, as shown in FIGS. 4 to 6, the bottom surface 10 c of the seat portion 10 is provided so as to be gradually inclined upward toward the front. Since the bottom surface of the seat portion 10 is formed as described above, the seat portion 10 can be accurately placed on the vehicle seat.

<Back>
The surface shape of the back portion 20 is curved in a widthwise concave shape in the body portion corresponding portion 21 and is inclined upward in the vertical direction toward the back side, and is provided substantially vertically in the scapula corresponding portion 22. The torso-corresponding portion 21 means a portion where the driver's torso abuts, and specifically means a position about 29 cm higher than the above-mentioned ischial-corresponding portion 11 (cross-sectional position in FIG. 9). The scapula-equivalent part 22 means a part where the driver's scapula abuts, and specifically means a position about 53 cm higher than the sciatica-equivalent part 11 (cross-sectional position in FIG. 10).

  The back portion 20 includes a lower portion 24 whose surface shape is continuous from the surface of the seat portion 10, an intermediate portion 25 which is continuous upward from the lower portion 24 and is inclined to the back side from the lower portion 24, and the intermediate portion It can be divided into an upper portion 26 that continues upward from 25 and is inclined more vertically than the intermediate portion 25 (see FIGS. 5 and 6). The torso-corresponding portion 21 is included in the intermediate portion 25, and the scapula-corresponding portion 22 is included in the upper portion 26. The lower portion 24, the intermediate portion 25, and the upper portion 26 all have a surface shape that curves in a concave shape in the width direction.

  The lower portion 24 of the back portion 20 can accurately fit the driver's buttocks back side by the surface shape. The intermediate portion 25 can accurately fit the driver's trunk according to the surface shape. As described above, the upper part 26 is in contact with the back of the chest, which is the upper side of the lumbar part, which is stably placed as described above, and therefore a gap is generated between the back of the driver's chest and the cushion for the automobile seat. Hateful.

  The lower portion 24 is curved in a widthwise concave shape and has a surface shape that continues to the surface of the seat portion 10. That is, the back portion 20 has a surface shape that is curved in the width direction concave shape on the back side and continues to the surface of the seat portion 10. In other words, the cushion for an automobile seat has a three-dimensional curved surface shape that is curved in the width direction concave shape and curved in the front and rear direction and the vertical direction concave shape in the lower portion 24 of the back portion 20 and the back side of the seat portion 10. . Thereby, it can hold | maintain so that a driver | operator's buttocks may be wrapped, and a driver | operator's attitude | position can be maintained correctly.

  The intermediate portion 25 has a surface shape that is curved in a concave shape in the width direction and that the upper side in the vertical direction is inclined to the back side at a predetermined inclination angle (see FIGS. 5, 6, and 9).

  The predetermined angle of the intermediate portion 25 is substantially uniform except for a continuous portion with the lower portion 24 and a continuous portion with the upper portion 26 (excluding both side portions in the width direction (bulging portions 29 described later)). ). That is, the intermediate portion 25 is provided with a substantially constant inclination angle in the vertical direction (except for a continuous portion with the lower portion 24 and a continuous portion with the upper portion 26). Specifically, as shown in FIGS. 5 and 6, the surface of the intermediate portion 25 is linear in the longitudinal section. Note that “substantially constant” includes not only the case where the inclination angle of the intermediate portion 25 is completely constant, but also the case where the absolute value of the difference from the average inclination angle of the intermediate portion 25 is within 3 °.

  The inclination angle of the intermediate portion 25 is not particularly limited, but the lower limit of the average inclination angle of the intermediate portion 25 is preferably 100 °, and more preferably 105 °. The upper limit of the average inclination angle of the intermediate portion 25 is preferably 120 °, and more preferably 115 °. When the average inclination angle of the intermediate portion 25 is within the above range, the driver's torso is easily placed in the back portion 20 accurately. In addition, this average inclination angle means the average value of the angle which the surface of an intermediate part makes with a horizontal surface in the state where the external force is not working when the said cushion for motor vehicle seats is mounted in a horizontal surface.

  The upper portion 26 has a surface shape that is curved in a concave shape in the width direction as described above and is provided substantially vertically in the vertical direction (see FIGS. 5, 6, and 10).

  The inclination angle of the upper portion 26 is substantially uniform except for the continuous portion with the intermediate portion 25. That is, the upper portion 26 is provided with a substantially constant inclination angle in the vertical direction (except for a continuous portion with the intermediate portion 25). Specifically, as shown in FIGS. 5 and 6, the surface of the upper portion 26 is linear in the longitudinal section. Note that “substantially constant” includes not only the case where the inclination angle of the upper and lower portions is completely constant, but also the case where the absolute value of the difference from the average value of the inclination angles of the upper and lower portions is within 3 °.

  Note that the surface shape of the upper portion 26 being substantially vertical in the vertical direction means that the average inclination angle of the upper portion 26 with respect to the horizontal is 85 ° or more and 100 ° or less. The lower limit is preferably 88 °, more preferably 90 °. The upper limit is preferably 98 ° and more preferably 95 °. This average inclination angle means an average value of angles formed with the horizontal plane when no external force is applied when the automobile seat cushion is placed on the horizontal plane.

  The average inclination angle of the intermediate portion 25 is larger than the average inclination angle of the upper portion 26, and the lower limit of the difference between the average inclination angle of the intermediate portion 25 and the average inclination angle of the upper portion 26 is preferably 10 °, 15 ° is more preferred. The upper limit of the difference between the average inclination angle of the intermediate portion 25 and the average inclination angle of the upper portion 26 is preferably 30 °, and more preferably 25 °. When the difference between the average inclination angle of the intermediate portion 25 and the average inclination angle of the upper portion 26 is within the above range, the intermediate portion 25 and the upper portion 26 can accurately exhibit the desired function described above.

  As described above, the surface shapes of the intermediate portion 25 and the upper portion 26 are concave in the width direction, and the concave shape of the intermediate portion 25 is deeper than the concave shape of the upper portion 26. That is, the concave shape of the trunk-corresponding portion 21 is deeper than the concave shape of the scapula-corresponding portion 22.

  Specifically, as shown in FIG. 9, the back portion 20 has a bulging portion 29 in which both side portions bulge to the front side in the intermediate portion 25. The bulging portion 29 is formed along the vertical direction, and is formed so that the vertical middle position of the intermediate portion 25 bulges most. In the figure, 20b is a side surface of the back part 20.

  The concave depth D2 of the intermediate portion 25 (difference between the deepest portion and the highest portion in the cross section (horizontal cross section) (see FIG. 9)) is not particularly limited. The lower limit of the concave depth D2 is preferably 5 cm, more preferably 8 cm. The upper limit of the concave depth D2 of the intermediate portion 25 is preferably 15 cm, and more preferably 12 cm. Since the concave depth D <b> 2 of the intermediate portion 25 is within the above range, the driver's torso portion can easily fit into the intermediate portion 25. The concave depth of the intermediate portion 25 means the highest numerical value (the deepest depth) in each cross section in the vertical direction of the intermediate portion 25.

  The concave depth D3 of the upper portion 26 (the difference between the deepest portion and the highest portion in the cross section (horizontal cross section) (see FIG. 10)) is not particularly limited. The lower limit of the concave depth D3 is preferably 0.3 cm, and more preferably 0.5 cm. The upper limit of the concave depth D3 of the upper portion 26 is preferably 3 cm, and more preferably 1.5 cm. Since the concave depth D3 of the upper portion 26 is within the above range, the movement of the driver's hand is hardly restricted.

  The height of the back portion 20 is not particularly limited, but the lower limit of the difference H1 in the vertical height between the upper end 20a of the back portion 20 and the sciatic region 11 (see FIG. 5) is preferably 45 cm, and 50 cm. More preferred. The upper limit of the vertical height difference H1 between the upper end of the back portion 20 and the ischial equivalent region 11 is preferably 75 cm, and more preferably 65 cm. As a result, the automobile seat cushion can be easily and reliably placed on the automobile seat.

  It is preferable that the vertical position of the lower end of the intermediate portion 25 (the upper end of the lower portion 24) is a location that contacts the iliac of the driver. The lower limit of the vertical height difference H2 between the lower end of the intermediate portion 25 and the ischial equivalent portion is preferably 5 cm, more preferably 7 cm, and even more preferably 9 cm. The upper limit of the vertical height difference H2 between the lower end of the intermediate portion 25 and the ischial equivalent portion is preferably 20 cm, more preferably 15 cm, and even more preferably 12 cm. Thereby, the intermediate part 25 tends to exhibit a desired function. In measuring the vertical height difference H2, the lower end of the intermediate portion 25 is the intermediate position in the vertical direction of the continuous portion where the inclination angle changes from the lower portion 24 in the longitudinal cross section (FIG. 5) at the center in the width direction. It can be.

  The lower limit of the vertical height difference H3 between the lower end of the upper portion 26 (the upper end of the intermediate portion 25) and the ischial equivalent portion is preferably 30 cm, more preferably 33 cm, and even more preferably 36 cm. The upper limit of the vertical height difference H3 between the lower end of the upper portion 26 and the ischial equivalent portion is preferably 50 cm, more preferably 45 cm, and even more preferably 41 cm. Thereby, the upper part 26 tends to exhibit a desired function. In the measurement of the vertical height difference H3, the lower end of the upper portion 26 is the intermediate position in the vertical direction of the continuous portion where the inclination angle changes from the intermediate portion 25 in the longitudinal section at the center in the width direction (FIG. 5). It can be.

  The width of the back portion 20 is not particularly limited, but the width W3 (see FIG. 10) of the upper portion 26 is preferably narrower than the width W2 (see FIG. 9) of the intermediate portion 25, that is, the scapula equivalent portion 22 The width of the back part 20 is preferably narrower than the width of the back part 20 of the body-corresponding portion 21. As a result, the driver's torso can easily be fitted accurately in the intermediate portion 25, and the movement of the driver's hand is not easily restricted.

  The lower limit of the average width of the upper portion 26 is preferably 25 cm, more preferably 28 cm, and even more preferably 30 cm. The upper limit of the average width of the upper portion 26 is preferably 40 cm, more preferably 37 cm, and even more preferably 35 cm. Thereby, the upper part 26 is easy to perform a desired function accurately.

  The lower limit of the average width of the intermediate portion 25 is preferably 30 cm, more preferably 33 cm, and further preferably 36 cm. The upper limit of the average width of the intermediate portion 25 is preferably 45 cm, more preferably 41 cm, and even more preferably 39 cm. This makes it easy for the intermediate portion 25 to perform a desired function accurately.

  The width W4 (see FIG. 2) of the lower portion 24 is preferably narrower than the width W2 of the intermediate portion 25. Thus, when the automobile seat cushion is placed on the automobile seat, the seat portion 10 and the back portion 20 are easily and reliably deformed by the lower portion 24 according to the angle between the seat surface and the backrest portion of the automobile seat. can do. The lower limit of the average width of the lower portion 24 is preferably 26 cm, more preferably 29 cm, and even more preferably 31 cm. The upper limit of the average width of the lower portion 24 is preferably 41 cm, more preferably 38 cm, and even more preferably 36 cm.

  As for the said back part 20, the back surface 20c (back surface) is curving convexly in the back side in the width direction and the up-down direction (refer FIGS. 4-6, FIG.9 and FIG.10). Specifically, as shown in FIGS. 9 and 10, the back surface 20 c of the back portion 20 has a flat (horizontal) center in the width direction and both sides are inclined forward. Further, as shown in FIGS. 4 to 6, the back surface 20 c of the back part 20 is provided so as to be gradually inclined toward the back side toward the upper side. Since the back surface 20c of the back part 20 is formed as described above, it is easy to accurately place the bicycle seat cushion on the automobile seat.

<Advantages>
In the cushion for an automobile seat according to the present embodiment having the above-described configuration, the surface shape of the intermediate portion 25 of the back portion 20 is curved in the width direction concave and the upper portion in the vertical direction is inclined to the back side. It is easy to fit in the back 20 accurately.

  Further, since the surface shape of the upper portion 26 of the back portion 20 is substantially vertical in the vertical direction, the chest rear surface on the upper side of the waist that is stably placed as described above is likely to be in contact with the back portion 20, A gap is unlikely to occur between the back of the chest and the back 20. In particular, when the driver is driving, the upper part of the upper body (line of upper thoracic vertebrae, ribs and scapula) is slightly tilted in order to see the front, but the upper part of the back part 20 as described above. Since the surface shape of 26 is substantially vertical in the vertical direction, the contact state between the back of the chest and the back portion 20 can be easily maintained, and the driver can be given a mental security, which makes the driver relax mentally. It's easy to do.

  Further, since the intermediate portion 25 is inclined upward in the vertical direction to the back side, the ribs of the driver are supported so as to be lifted upward by the intermediate portion, thereby reducing the feeling of pressure on the chest and driving. The driver can relax more easily and the driver can easily breathe.

  In addition, since the surface shape of the seat portion 10 is concavely curved in both the width direction and the front-rear direction at the sciatic equivalent portion 11, the sciatic bone of the driver's buttocks can easily fit into the sciatic equivalent portion 11, and thus the driver Is easy to sit in the correct position. Moreover, since the surface shape of the back part 24 of the seat part 10 and the lower part 24 of the back part 20 is continuous as mentioned above, and it is a three-dimensional curved surface shape, a driver | operator's buttocks can be correctly stored in this part. It is possible to stabilize the driver's buttocks sitting in the correct position as described above. As described above, the driver's buttocks that are seated at an accurate position are stabilized, so that the intermediate portion 25 and the upper portion 26 of the back portion 20 can be brought into contact with the driver's desired portion accurately. Further, as described above, the heel portion is accurately placed in the lower portion 24 of the seat portion 10 and the back portion 20, so that it is possible to enhance the mental security given to the driver.

  In addition, although the said embodiment has the said advantage from the said structure, it can change a design suitably within the range which this invention intends.

  That is, in the above embodiment, the cushion for an automobile seat used mainly for a driver's seat has been described as an example. However, the present invention is not necessarily limited thereto, and may be applied to a passenger seat, for example. Is possible.

  Furthermore, in the said embodiment, although demonstrated taking the case of the cushion for motor vehicle seats which coat | covered the cover to the cushion main body 1, the said cover is not an essential structural requirement in this invention.

  As described above, the cushion for an automobile seat according to the present invention is easy to give the seated person a spiritual security and is easy for the seated person to relax mentally. Therefore, the cushion for the automobile seat according to the present invention is mounted on the seat of the driver's seat. It can be particularly suitably used as a cushion to be placed.

DESCRIPTION OF SYMBOLS 1 Cushion body 10 Seat part 10a Front end 10b Side face 10c Bottom face 11 Sciatic bone equivalent part 13 Convex part 14 Convex part 20 Back part 20a Upper end 20b Side face 20c Back part 21 Trunk part equivalent part 22 Scapula equivalent part 24 Lower part 25 Middle part 26 Upper part Part 29 bulge

Claims (8)

A cushion for an automobile seat placed on an automobile seat,
A seat that is placed on the seat surface and abuts on the buttocks of the seated person, and a back that abuts on the back of the seated person,
The back part is curved in a concave shape in the width direction at the body-corresponding portion where the seated person's torso abuts, and the upper part in the vertical direction is inclined to the back side. A cushion for an automobile seat having a vertical surface shape.   The cushion for an automobile seat according to claim 1, wherein a surface shape of the back portion is curved in a widthwise concave shape at the scapula-equivalent site, and a concave shape of the trunk-equivalent site is deeper than a concave shape of the scapula-equivalent site.   The cushion for an automobile seat according to claim 1 or 2, wherein a width of a back portion in the portion corresponding to the scapula is narrower than a width of a back portion in the portion corresponding to the trunk portion.   4. The cushion for an automobile seat according to claim 1, wherein the surface shape of the seat portion is curved in a concave shape in both the width direction and the front-rear direction at a portion corresponding to a sciatic abutment of a seated person's sciata.   The cushion for automobile seats according to any one of claims 1 to 4, wherein the seat portion and the back portion are integrally formed.   The cushion for an automobile seat according to claim 5, wherein the seat portion has a surface shape that is curved in a concave shape in the width direction on the back side and is continuous with the surface of the back portion.   The automobile seat cushion according to claim 5 or 6, wherein the back portion is curved in a concave shape in the width direction at a lower portion and has a surface shape continuous with the surface of the seat portion.   The cushion for an automobile seat according to claim 5, 6 or 7, wherein an angle formed by a side view of the seat portion and the back portion is 95 ° or more and 110 ° or less.

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