JP5190341B2 - Vehicle seat cushion structure - Google Patents

Description

  The present invention relates to a vehicle seat cushion structure.

  In recent years, vehicles equipped with knee airbags for protecting the occupant's knees at the time of a vehicle collision have been developed only in the driver's seat or in both the driver's seat and the passenger seat.

  In the case of a vehicle equipped with the knee airbag, in the event of a vehicle collision, as shown in FIG. 10, the knee airbag 2 is instantly inflated from the lower opening of the instrument panel 1 into the vehicle interior by the gas injected from the inflator. By interposing the knee airbag 2 between the knee part of the occupant 4 seated on the seat 3 and the instrument panel 1, the impact is absorbed and the knee part of the occupant 4 is protected.

For example, Patent Document 1 shows a general technical level related to a vehicle equipped with the knee airbag 2 as described above.
JP-A-10-138809

  By the way, in a vehicle equipped with the knee airbag 2 as described above, when a person with an average physique as the occupant 4 sits on the seat 3 composed of the seat cushion 3A and the seat back 3B, In any of the passenger seats, since the seat 3 is slid to the rear along the base frame 5 to some extent, a space for inflating the knee airbag 2 is secured as shown in FIG. The performance of the bag 2 is ensured.

  However, when a small person sits on the seat 3 as the occupant 4, especially in the case of a driver's seat, the seat 3 is slid forward along the base frame 5 in order to select the best position for driving. Therefore, as shown in FIG. 11, the calf of the occupant 4 hits the front end of the seat cushion 3A, and the tip of the knee protrudes forward, so that the space for inflating the knee airbag 2 is extremely large. As a result, there is a possibility that the performance of the knee airbag 2 cannot be sufficiently ensured at the time of a vehicle collision.

  Even in the passenger seat, when a small person as the occupant 4 sits on the seat 3, the seat 3 is often slid forward, and as in the case of the driver seat, the knee airbag 2 at the time of a vehicle collision. There was a possibility that sufficient performance could not be secured.

  Further, in the case of a small person, as shown in FIG. 11, in either the driver's seat or the passenger seat, the body sits so as to sit shallowly on the front side of the seat cushion 3A, so that the upper body is supported by the seat back 3B. There is a possibility that the posture becomes insufficient and the posture becomes difficult to stabilize.

  In view of such circumstances, the present invention can sufficiently secure a deployment space of a knee airbag at the time of a vehicle collision even when a small person sits on a seat, and sufficiently supports the upper body by a seat back. It is an object of the present invention to provide a vehicle seat cushion structure that can be performed and can stabilize a posture.

The present invention is a vehicle seat cushion structure equipped with a knee airbag,
The present invention relates to a vehicle seat cushion structure characterized in that a deformation promoting portion for elastically deforming the front end position of the seat cushion rearward by a load applied by a seated passenger's leg is formed at the front portion of the seat cushion.

  According to the above means, the following operation can be obtained.

  When a small person as an occupant sits on either the driver's seat or the passenger's seat, when the seat is slid forward, when the occupant's calf hits the front end of the seat cushion, it forms at the front of the seat cushion Since the deformation promotion portion is bent so as to be crushed, the front end position of the seat cushion is elastically deformed rearward, so that the front portion of the occupant's knee is prevented from protruding forward, and there is a space for the knee airbag to expand. It will not be extremely narrowed, and the knee airbag can be fully deployed in the event of a vehicle collision.

  Further, in the case of a small person, in either the driver seat or the passenger seat, the deformation promoting portion is bent so as to be crushed, so that the seat cushion is deeply and firmly seated, so that it is shallow on the front side of the seat cushion. Unlike sitting on a seat, the upper body is fully supported by the seat back, making it easier to stabilize the posture.

  In the vehicle seat cushion structure, it is preferable that the deformation promoting portion is a recess in which a part of a pad constituting the seat cushion is cut out.

  In the vehicle seat cushion structure, it is preferable that the deformation promoting portion is a hollow portion formed by hollowing out a part of a pad constituting the seat cushion.

  In the vehicle seat cushion structure, it is preferable that the deformation promoting portion is a soft portion in which a part of a pad constituting the seat cushion is partially reduced in hardness.

  According to the vehicle seat cushion structure of the present invention, even when a small person is seated on the seat, the knee airbag can be sufficiently deployed in the event of a vehicle collision, and the upper body is supported by a seat back or the like. Can be sufficiently performed, and an excellent effect that the posture can be stabilized can be achieved.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 and 2 show an example of an embodiment of the present invention. In the figure, the same reference numerals as those in FIGS. 10 and 11 denote the same components, and the basic configuration is shown in FIGS. Although it is the same as the conventional one shown in FIG. 11, the feature of this example is that, as shown in FIG. 1 and FIG. 2, the load applied by the legs of the occupant 4 seated on the front portion of the seat cushion 3A This is in that a deformation promoting portion 6 for elastically deforming the front end position of the seat cushion 3A rearward is formed.

  In the case of this illustrated example, the seat cushion 3A is made of resin in which a pad 3c such as urethane foam whose outer surface is covered with a skin 3b is stitched to the peripheral edge of the skin 3b on a seat pan 3a made of a thin metal plate. The hook 3d is attached by engaging with a locking hole 3e formed in the peripheral edge of the seat pan 3a.

  Further, as shown in FIG. 2A, the deformation promoting portion 6 constitutes the seat cushion 3A on the front inclined portion 7 having an inclination that is lower than the front end of the seat cushion 3A and recedes downward. A recess 8 is formed by cutting out a part of the pad 3c.

  Next, the operation of the illustrated example will be described.

  When a small person as the occupant 4 is seated on the seat 3 of either the driver seat or the passenger seat, when the seat 3 is slid forward along the base frame 5, as shown in FIG. When the calf hits the front end of the seat cushion 3A, as shown in FIG. 2 (b), the recess 8 as the deformation promoting portion 6 formed in the front portion of the seat cushion 3A is crushed from the state shown in FIG. 2 (a). Since the front end position of the seat cushion 3A is elastically deformed rearward by bending, it is possible to avoid the front part from protruding forward from the knee of the occupant 4, and the space for inflating the knee airbag 2 is extremely narrowed. Thus, the knee airbag 2 can be fully deployed in the event of a vehicle collision.

  Further, in the case of a small person, in either the driver seat or the passenger seat, as shown in FIG. 2 (b), as shown in FIG. Since the seat cushion 3A is seated deeply and firmly, as shown in FIG. 11, unlike the seat cushion 3A seated on the front side, the upper body is sufficiently supported by the seat back 3B. It is done and the posture becomes easy to stabilize.

  In addition, as shown in FIG. 2A, the deformation promoting portion 6 constitutes the seat cushion 3A on the front inclined portion 7 having an inclination that is lower than the front end of the seat cushion 3A and retreats downward. Since it is configured by forming a recess 8 in which a part of the pad 3c is cut out, the load is not applied by the leg of the occupant 4 to be seated, as well as the state shown in FIG. In any of the states shown in FIG. 2B where a load is applied by the legs of the occupant 4 and the front end position of the seat cushion 3A is elastically deformed rearward, there is almost no fear that the appearance will deteriorate.

  Thus, even when a small person is seated on the seat 3, it is possible to sufficiently secure the deployment space of the knee airbag 2 at the time of the vehicle collision, and to sufficiently support the upper body by the seat back 3B. The posture can be stabilized. Note that the front end portion of the seat cushion 3A is a portion that is not often used for a person with an average physique, so the deformation promoting portion 6 has little influence on the supportability and the like.

  Further, in the example of FIG. 2, the concave portion 8 as the deformation promoting portion 6 is formed so as to extend over the entire width in the width direction of the seat cushion 3A, or a calf contact portion at the front portion of the seat cushion 3A. For example, as shown in FIG. 3, it can also be formed at a required interval in the width direction of the seat cushion 3A, and in this case, the portion where the recess 8 is not formed. The outer skin 3b is supported by the pad 3c from the inside, and it is avoided that the outer skin 3b is unnaturally recessed, which is effective in improving the appearance while having the function of promoting elastic deformation. Become.

  FIG. 4 shows the deformation promoting portion 6 formed in the front portion of the seat cushion 3A in an example of an embodiment of the present invention as a hollow portion 9 in which a part of the pad 3c constituting the seat cushion 3A is hollowed out.

  As shown in FIG. 4, in the example in which the deformation promoting portion 6 is the hollow portion 9, when a small person as the occupant 4 sits on either the driver seat or the passenger seat 3, the seat 3 is attached to the base frame 5. When the calf of the occupant 4 hits the front end of the seat cushion 3A as shown in FIG. 1, the seat shown in FIG. 4 (a) is changed to the seat shown in FIG. 4 (b). The hollow portion 9 as the deformation promoting portion 6 formed in the front portion of the cushion 3A is bent so as to be crushed, and the front end position of the seat cushion 3A is elastically deformed rearward, so that the portion ahead from the knee of the occupant 4 protrudes forward. Thus, the space for inflating the knee airbag 2 is not extremely narrowed, and the knee airbag 2 can be sufficiently deployed at the time of a vehicle collision.

  Further, in the case of a small person, in either the driver seat or the passenger seat, as shown in FIG. 4B, the hollow portion 9 as the deformation promoting portion 6 is bent so as to be crushed. Thus, since the seat cushion 3A is seated deeply and firmly, as shown in FIG. 11, the upper body is sufficiently supported by the seat back 3B, unlike the seat cushion 3A, which is seated shallowly on the front side. The posture becomes easier to stabilize.

  In addition, as shown in FIG. 4 (a), the deformation promoting portion 6 is formed by forming a hollow portion 9 in which a part of the pad 3c constituting the seat cushion 3A is hollowed out. In the state shown in FIG. 4A in which no load is applied by the legs of the leg, there is no concern that the appearance will deteriorate, and the hollow portion 9 can be formed in a portion having a high deformation promoting effect, and the degree of freedom of design is increased and the user is seated. Even in the state shown in FIG. 4B in which the load is applied by the legs of the occupant 4 and the front end position of the seat cushion 3A is elastically deformed rearward, there is almost no fear that the appearance will deteriorate.

  Thus, in the case of the example shown in FIG. 4 as well, in the case of the example shown in FIGS. 1 and 2, even when a small person is seated on the seat 3, the deployment space of the knee airbag 2 at the time of the vehicle collision is sufficient. And the upper body can be sufficiently supported by the seat back 3B, and the posture can be stabilized.

  FIG. 5 shows a deformation promoting portion 6 formed in the front portion of the seat cushion 3A according to an embodiment of the present invention, and a soft member 10a softer than the pad 3c in the hollow portion 9 (see FIG. 4). This is part 10.

  As shown in FIG. 5, in the example in which the deformation promoting portion 6 is a soft portion 10 in which the hollow portion 9 (see FIG. 4) is filled with a soft member 10 a that is softer than the pad 3 c, When the seat 3 is slid forward along the base frame 5 when sitting on either the driver seat or the passenger seat 3, as shown in FIG. 1, the calf of the occupant 4 moves the front end of the seat cushion 3A. 5A, the soft part 10 as the deformation promoting part 6 formed in the front part of the seat cushion 3A is bent so as to be crushed from the state shown in FIG. Since the front end position is elastically deformed rearward, it is possible to avoid the front portion of the occupant 4 from protruding forward, and the space for inflating the knee airbag 2 is not extremely narrowed. Knee air bag 2 will be able to fully deploy in the event of a collision.

  Further, in the case of a small person, in either the driver seat or the passenger seat, as shown in FIG. 5 (b), the soft portion 10 as the deformation promoting portion 6 is bent so as to be crushed. Thus, since the seat cushion 3A is seated deeply and firmly, as shown in FIG. 11, the upper body is sufficiently supported by the seat back 3B, unlike the seat cushion 3A, which is seated shallowly on the front side. The posture becomes easier to stabilize.

  Moreover, as shown in FIG. 5A, the deformation promoting portion 6 is configured by forming a soft portion 10 in which the hollow portion 9 (see FIG. 4) is filled with a soft member 10a that is softer than the pad 3c. Therefore, in the state shown in FIG. 5A in which no load is applied by the legs of the seated occupant 4, there is no concern that the appearance will deteriorate, and the soft portion 10 can be formed in a portion having a high deformation promoting effect. In the state shown in FIG. 5B in which the degree of freedom is increased and a load is applied by the legs of the seated occupant 4 and the front end position of the seat cushion 3A is elastically deformed rearward, there is almost no fear that the appearance will deteriorate. Furthermore, when it is difficult to mold the hollow portion 9 (see FIG. 4) in terms of manufacturing, it is effective as a countermeasure.

  Thus, in the case of the example shown in FIG. 5, as in the case of the examples shown in FIGS. 1 and 2, even when a small person is seated on the seat 3, the deployment space of the knee airbag 2 at the time of the vehicle collision is sufficient. And the upper body can be sufficiently supported by the seat back 3B, and the posture can be stabilized.

  6 and 7 show a deformation promoting portion 6 formed in the front portion of the seat cushion 3A in an example of an embodiment of the present invention, a soft portion that partially reduces the hardness of a part of the pad 3c constituting the seat cushion 3A. 11, the soft portion 11 is formed by forming the notch portion 12 with a required interval in the width direction of the seat cushion 3 </ b> A.

  As shown in FIGS. 6 and 7, the deformation promoting portion 6 is a soft portion 11 that partially reduces the hardness of a part of the pad 3c constituting the seat cushion 3A, and the soft portion 11 is the width of the seat cushion 3A. In the example configured by forming the notch portion 12 with a required interval in the direction, when the small person as the occupant 4 sits on the seat 3 of either the driver seat or the passenger seat, the seat 3 is attached to the base frame 5. 1, when the calf of the occupant 4 hits the front end of the seat cushion 3A as shown in FIG. 1, the seat shown in FIG. 6 (b) is changed from the state shown in FIG. 6 (a). The soft part 11 as the deformation promoting part 6 formed in the front part of the cushion 3A is bent so as to be crushed by the action of the notch part 12, and the front end position of the seat cushion 3A is elastically deformed rearward. Previous portion is avoided that protrude forward, prevents the space for the knee air bag 2 is inflated thus narrowed extremely, the knee air bag 2 will be able to fully deployed when the vehicle crash.

  Further, in the case of a small person, in either the driver seat or the passenger seat, the soft portion 11 as the deformation promoting portion 6 bends so as to be crushed by the action of the notch portion 12 as shown in FIG. Accordingly, as shown in FIG. 1, the seat cushion 3A is seated deeply and firmly. As shown in FIG. 11, the seat back 3B is different from the seat cushion 3A that is seated shallowly on the front side. The upper body is sufficiently supported, and the posture is easily stabilized.

  In addition, as shown in FIGS. 6A and 7, the deformation promoting portion 6 is a soft portion 11 that partially reduces the hardness of a part of the pad 3c that constitutes the seat cushion 3A. In the state shown in FIG. 6 (a) in which no load is applied by the legs of the seated occupant 4 because the notches 12 are formed with a required interval in the width direction of the seat cushion 3A. The surface 3b is supported from the inside by the pad 3c in the portion where the portion 12 is not formed, and it is avoided that the surface 3b is dented unnaturally, and has an appearance while having a function of promoting elastic deformation. In addition to being effective for improvement, the load is applied by the legs of the seated occupant 4 and the front end position of the seat cushion 3A is elastically deformed rearward. Kunar worry there is little.

  Thus, in the example shown in FIGS. 6 and 7, as in the example shown in FIGS. 1 and 2, even when a small person sits on the seat 3, the knee airbag 2 is deployed at the time of a vehicle collision. A sufficient space can be secured, and the upper body can be sufficiently supported by the seat back 3B, so that the posture can be stabilized.

  8 and 9 show a deformation promoting portion 6 formed in the front portion of the seat cushion 3A in an example of an embodiment of the present invention, a soft portion that partially reduces the hardness of a part of the pad 3c constituting the seat cushion 3A. 11, the soft portion 11 is configured by filling a soft member 11a into a cutout portion 12 formed at a required interval in the width direction of the seat cushion 3A. The soft member 11a may be molded by integral foaming with the pad 3c, or may be molded as a separate product and bonded so as to be packed in the notch 12 of the pad 3c.

  As shown in FIGS. 8 and 9, the deformation promoting portion 6 is a soft portion 11 that partially reduces the hardness of a part of the pad 3c constituting the seat cushion 3A, and the soft portion 11 is the width of the seat cushion 3A. In the example configured by filling the notch 12 formed with a required interval in the direction with the soft member 11a, when a small person as the occupant 4 sits on the seat 3 of either the driver seat or the passenger seat, When the seat 3 is slid forward along the base frame 5, as shown in FIG. 1, when the calf of the occupant 4 hits the front end of the seat cushion 3A, the state shown in FIG. ), The soft part 11 as the deformation promoting part 6 formed in the front part of the seat cushion 3A is bent so as to be crushed by the action of the soft member 11a filled in the notch part 12, and the seat cushion Since the front end position is elastically deformed rearward, it is possible to prevent the front part of the occupant 4 from protruding forward and the space for inflating the knee airbag 2 is not extremely narrowed. The knee airbag 2 can be sufficiently deployed at the time of a collision.

  In the case of a small person, in either the driver seat or the passenger seat, as shown in FIG. 8B, the action of the soft member 11a in which the soft portion 11 as the deformation promoting portion 6 is filled in the notch portion 12 is provided. 1 so that the seat cushion 3A is seated deeply and firmly as shown in FIG. 1. Therefore, as shown in FIG. 11, the seat cushion 3A is seated so as to sit shallowly on the front side. In contrast, the upper body is sufficiently supported by the seat back 3B, and the posture is easily stabilized.

  In addition, as shown in FIGS. 8A and 9, the deformation promoting portion 6 is a soft portion 11 that partially reduces the hardness of a part of the pad 3c that constitutes the seat cushion 3A. FIG. 8 (a) shows that no load is applied by the legs of the seated occupant 4 because the notches 12 formed in the width direction of the seat cushion 3A are filled with a soft member 11a. In the state shown in FIG. 2, since the soft member 11a is filled in the portion where the notch 12 is formed, there is no concern that the appearance will deteriorate, and a load is applied by the leg of the seated occupant 4 and the front end of the seat cushion 3A Even in the state shown in FIG. 8B in which the position is elastically deformed rearward, there is almost no fear that the appearance will deteriorate.

  Thus, in the case of the example shown in FIGS. 8 and 9, as in the case of the example shown in FIGS. 1 and 2, even when a small person is seated on the seat 3, the knee airbag 2 is deployed at the time of the vehicle collision. A sufficient space can be secured, and the upper body can be sufficiently supported by the seat back 3B, so that the posture can be stabilized.

  In addition, the vehicle seat cushion structure of the present invention is not limited to the illustrated example described above, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

It is a side view which shows an example of the form which implements this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a sectional side view which shows the recessed part as a deformation | transformation promotion part formed in the seat cushion front part in an example of embodiment which implements this invention, Comprising: (a) shows the state by which the load is not applied by the passenger | crew's leg to seat. FIG. 4B is a view showing a state in which a load is applied by a seated passenger's leg and the seat cushion front end position is elastically deformed rearward. 2 is a cross-sectional plan view showing a modification in which the concave portion is formed so as to extend in the width direction of the seat cushion with a required interval instead of being formed so as to extend in the width direction of the seat cushion in the example of FIG. It is an III-III cross-section equivalent view of (a). BRIEF DESCRIPTION OF THE DRAWINGS It is a sectional side view which shows the hollow part as a deformation | transformation acceleration | stimulation part formed in the seat cushion front part in an example of embodiment which implements this invention, Comprising: (a) is a state where the load is not applied by the passenger | crew's leg to seat. FIG. 4B is a diagram showing a state in which a load is applied by a seated passenger's leg and the front end position of the seat cushion is elastically deformed rearward. BRIEF DESCRIPTION OF THE DRAWINGS It is a sectional side view which shows the soft part as a deformation | transformation acceleration | stimulation part formed in the seat cushion front part in an example of embodiment which implements this invention, Comprising: (a) is a state where the load is not applied by the passenger | crew's leg to seat. FIG. 4B is a diagram showing a state in which a load is applied by a seated passenger's leg and the front end position of the seat cushion is elastically deformed rearward. BRIEF DESCRIPTION OF THE DRAWINGS It is a sectional side view which shows the modification of the soft part as a deformation | transformation acceleration | stimulation part formed in the seat cushion front part in an example of embodiment which implements this invention, Comprising: (a) is a load applied by the passenger | crew's leg to seat. FIG. 7B is a diagram showing a state in which a load is applied by a seated occupant's leg and the seat cushion front end position is elastically deformed rearward. It is VII-VII sectional drawing of Fig.6 (a). It is side sectional drawing which shows the further modification of the soft part as a deformation | transformation promotion part formed in the seat cushion front part in an example of embodiment which implements this invention, Comprising: (a) is a load added by the passenger | crew's leg to seat. The figure which shows the state which is not carried out, (b) is a figure which shows the state which the load was added by the passenger | crew's leg | leg who are seated and the seat cushion front-end position elastically deformed back. It is IX-IX sectional drawing of Fig.8 (a). It is a side view which shows the state which the person of average physique seated by sliding the conventional sheet | seat back. It is a side view which shows the state where the small person was seated by sliding the conventional seat forward.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Instrument panel 2 Knee airbag 3 Seat 3A Seat cushion 3a Seat pan 3b Skin 3c Pad 3B Seat back 4 Crew 6 Deformation promotion part 7 Front inclination part 8 Recess 9 Hollow part 10 Soft part 10a Soft member 11 Soft part 11a Soft part 12 Notch

Claims (4)

A vehicle seat cushion structure equipped with a knee airbag,
A vehicle seat cushion structure, wherein a deformation promoting portion for elastically deforming a seat cushion front end position rearward by a load applied by a seated passenger's leg is formed at a front portion of the seat cushion.   The vehicle seat cushion structure according to claim 1, wherein the deformation promoting portion is a recess formed by cutting out a part of a pad constituting the seat cushion.   The vehicle seat cushion structure according to claim 1, wherein the deformation promoting portion is a hollow portion formed by hollowing out a part of a pad constituting the seat cushion.   The vehicle seat cushion structure according to claim 1, wherein the deformation promoting portion is a soft portion in which a part of a pad constituting the seat cushion is partially reduced in hardness.

Images