JP4923779B2 - Crew restraint device and vehicle seat - Google Patents

Description

  The present invention relates to an occupant restraint device for restraining an occupant of a seat of a vehicle such as an automobile at the time of a collision, and in particular, restrains an occupant's waist during a frontal collision, and the occupant's body moves forward and downward. The present invention relates to an occupant restraint device configured to prevent. Moreover, this invention relates to the vehicle seat provided with this passenger | crew restraint apparatus.

  Japanese Patent Application Laid-Open No. 10-217818 discloses a system for restraining an automobile occupant at the time of a collision in order to prevent a submarine phenomenon in which the occupant tries to pass through the lower side of the lap belt even when a seat belt is worn. Describes an occupant restraint device in which an inflatable bag is disposed between a seat cushion and a seat pan, and the front portion of the seat cushion is pushed up by inflating the bag at the time of a vehicle collision.

  FIG. 6 is a longitudinal sectional view in the front-rear direction of the seat showing the passenger restraint device disclosed in the publication. An airbag 104 is disposed between a cushion frame (seat pan) 100 and a seat pad (seat cushion) 102 at the front portion of the seat. The airbag 104 extends in the left-right width direction of the seat and can be inflated by an inflator 106. The upper surface of the seat pad 102 is covered with a trim cover 108, and an occupant sits thereon.

  When the inflator 106 is actuated at the time of a vehicle collision, the airbag 104 is inflated, and the front part of the seat pad 102 is pushed up or pushed up from below to increase the density, thereby preventing forward movement of the occupant body. Included).

When the seat cushion is supported by a seat spring, a bag may be provided on the seat spring.
JP-A-10-217818

  In the present invention, a support member for supporting the bag via the seat pan or the seat spring is provided on the lower side of the seat pan or the seat spring. It is an object of the present invention to provide an occupant restraint device having good sitting comfort and a vehicle seat provided with the occupant restraint device.

Occupant restraint system according to claim 1 is installed on the upper side of the seat pan or seat springs for supporting the seat cushion, the occupant restraint system having an inflatable bag to press the seat cushion from below, said seat The pan or the seat spring can be elastically bent up and down, and the bag is supported from below and / or from the front via the seat pan or the seat spring under the seat pan or the seat spring. The support member is provided apart from the seat pan or the seat spring, and the support member extends in the left-right direction of the seat. It is coupled to the seat frame of the seat, between the said supporting Seung member and the seat pan or seat springs, cushion material provided And it is characterized in that they are.
The occupant restraint device according to claim 2 is characterized in that, in claim 1, the cushion material is made of urethane.

The occupant restraint system of claim 3, installed on the upper side of the seat pan or seat springs for supporting the seat cushion, the occupant restraint system having an inflatable bag to press the seat cushion from below, said seat The pan or the seat spring can be elastically bent up and down, and the bag is supported from below and / or from the front via the seat pan or the seat spring under the seat pan or the seat spring. The support member is provided apart from the seat pan or the seat spring, and the support member extends in the left-right direction of the seat. is coupled to the seat frame of the seat, when the seat pan or seat springs is bent downward, the seat pan or Sea It is characterized in that the guide for guiding so as to approach the said supporting Seung member bag installation area of the spring is provided.

According to a fourth aspect of the present invention, the occupant restraining device according to the first or second aspect is configured such that when the seat pan or the seat spring is bent downward, a bag installation area of the seat pan or the seat spring is brought closer to the support member. A guide for guiding is provided.

The occupant restraint device according to claim 5 is the occupant restraint device according to claim 3 or 4 , wherein the guide has a shaft portion extending from a lower surface of a bag installation area of the seat pan or seat spring toward the support member. The shaft portion is characterized by penetrating the support member so as to be movable integrally with the seat pan or the seat spring in the extending direction.
The occupant restraint device according to claim 6 is the occupant restraint device according to claim 5, wherein a flange projects from the upper end side to the side of the shaft portion, and the lower end side of the shaft portion has a larger diameter than the shaft portion. And a guide insertion hole is provided in each of the seat pan or the seat spring and the upper surface of the support member facing the elastic engagement portion. The diameter of the guide insertion hole is The shaft portion can pass through, but the flange cannot pass through, and the elastic engagement portion is capable of entering the guide insertion hole by elastically reducing the diameter. After passing through the guide insertion hole, the diameter is increased to the original size so that it cannot be removed from the guide insertion hole. The shaft portion is pushed into each guide insertion hole, The elastic engagement portion engages with the lower surface side of the support member, and the flange overlaps with the upper surface side of the seat pan or the seat spring, whereby the seat pan or the seat spring and the support member are interposed via the guide. And the bag is installed above the flange and above the seat pan or seat spring.

An occupant restraint device according to a seventh aspect is characterized in that, in any one of the first to sixth aspects, a distance between the seat pan or the seat spring and the support member is 3 to 100 mm.

The occupant restraint device according to claim 8 is the occupant restraint device according to any one of claims 1 to 7 , wherein the support member is disposed such that an intermediate position in the front-rear direction is shifted forward from an intermediate position in the front-rear direction of the bag. The upper surface of the support member is an inclined surface that is upwardly inclined toward the front, and when the seat pan or the seat spring is bent downward, the support member is interposed via the seat pan or the seat spring. Is configured to support the bag from diagonally forward and downward .
An occupant restraint device according to a ninth aspect is characterized in that, in any one of the first to eighth aspects, the bag is directly installed on the seat pan or a seat spring.
The occupant restraint device according to a tenth aspect is the occupant restraint device according to any one of the first to ninth aspects, wherein the bag is installed on an upper side of the seat pan, and a front edge side of a bag installation area of the seat pan is forward. It is characterized by an inclined surface having an upward slope.

A vehicle seat according to an eleventh aspect includes the occupant restraint device of the present invention.

  In the occupant restraint device according to claim 1, a support member for supporting the bag from below and / or from the front via the seat pan or the seat spring is provided below the seat pan or the seat spring. .

  The support member is separated from the seat pan or the seat spring, and the seat pan or the seat spring can be deflected downward by that amount. Therefore, the elastic force of the seat pan or the seat spring causes the seat when the bag is not inflated. The sitting comfort can be improved.

  In addition, since a cushion material is provided between the seat pan or the seat spring and the support member, it is possible to prevent a feeling of bottoming or an abnormal noise when the seat pan or the seat spring contacts the support member. Or relaxed.

  When a vehicle equipped with this occupant restraint system has a frontal collision, the bag is inflated above the seat pan or the seat spring, and the seat cushion is pushed up or compressed by the inflated bag to become hard, and the front of the occupant Movement is restrained. At this time, the seat pan or seat spring on the lower side of the bag bends downward due to the load from the occupant and comes into contact with the support member. As a result, the inflated bag is supported from below and / or from the front by the support member via the seat pan or the seat spring, so that the bag is firmly pushed forward of the occupant without being pushed away by a load from the occupant. Movement can be restrained.

The occupant restraint device according to claim 3 is provided with a support member for supporting the bag from below and / or from the front side, separated from the seat pan or the seat spring, below the seat pan or the seat spring. ing. For this reason, the elasticity of the seat pan or the seat spring is ensured, and the seating comfort when the bag is not inflated can be improved.

In the occupant restraint device according to claim 3 , when the seat pan or the seat spring is bent downward, the bag installation area of the seat pan or the seat spring is guided so as to approach the support member. A guide is provided. Therefore, when the vehicle is collided head-on and the bag is inflated, if the seat pan or seat spring on the lower side of the bag bends downward due to the load from the passenger, the bag installation area of the seat pan or seat spring is It is guided by this guide and comes into contact with the support member. This ensures that the inflated bag is supported by the support member via the bag installation area.

Also in the occupant restraint device according to claim 1, wherein the cushion member is provided between the seat pan or the seat spring and the support member as in claim 4 , when the seat pan or the seat spring is bent downward, the seat pan Or you may provide the guide which guides so that a bag installation area may be approached to a support member among seat springs.

If it is the guide of Claim 5 , it is possible to guide the bag installation area of a seat pan or a seat spring to approach the support member with a simple configuration.

As in claim 7, in the present invention, it is preferred spacing between the seat pan or seat springs and the bearing member is a 3～100Mm. When this interval is larger than 100 mm, the bag support effect by the support member is significantly reduced. Moreover, when this space | interval becomes smaller than 3 mm, the cushion effect by this seat pan or a seat spring will be impaired.

In the present invention, the bearing member extends in the lateral direction of the sheet, both ends thereof extending direction that is connected to the left and right seat frames of the seat. By having such a configuration, the mounting strength of the sheet bearing member becomes excellent, it is possible to support the bag over a wide range of lateral width direction of the sheet.

  In the vehicle seat provided with the occupant restraint device of the present invention, the sitting comfort when the bag is not inflated is good, and the occupant restraint effect when the bag is inflated is high.

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

  FIG. 1 is a perspective view of a base frame of a seat provided with an occupant restraint device according to an embodiment when the bag is not inflated, FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, and FIG. ), (B) are cross-sectional views of the base frame when the bag is inflated. FIG. 3 (a) shows a state before the bag is supported by the support member, and FIG. 3 (b) shows a state where the bag is supported by the support member. In the following description, the front-rear direction refers to the front-rear direction of the seat, and the left-right direction refers to the left-right direction of the seat.

  A frame constituting an automobile seat includes a base frame 1 and a back frame (not shown) rotatably connected to a rear portion of the base frame 1 via a reclining device (not shown). A headrest (not shown) is attached to the top of the back frame.

  The base frame 1 has a pair of side frames 2 and 3 extending in the front-rear direction along the left and right sides of the seat. A seat pan 4 is installed between the front end portions of the side frames 2 and 3. The rear ends of the side frames 2 and 3 are connected by a shaft 5. A seat spring 6 is stretched between the rear end portion of the seat pan 4 and the shaft 5.

  The seat pan 4 and the seat spring 6 can be flexed up and down elastically.

  A seat cushion 7 (shown by a two-dot chain line in FIG. 3) made of urethane or the like is mounted on the base frame 1. The seat cushion 7 is supported by a seat pan 4 and a seat spring 6. Although not shown, a seat back made of urethane or the like is also attached to the back frame.

  In this embodiment, an inflatable bag 10 is installed on the seat pan 4 so as to press the seat cushion 7 from below. In this embodiment, the seat pan 4 is provided with a bag installation portion 4a formed of a recess that is one step lower than the upper surface of the seat pan 4, and the bag 10 is disposed in the bag installation portion 4a. In the seat pan 4, the front edge side of the bag installation portion 4 a is an inclined surface with an upward slope toward the front, and when the bag 10 is inflated, the inclined surface supports the bag 10 from the front. .

  As shown in FIG. 1, the bag 10 extends in the left-right direction in the bag setting portion 4a, and the left and right ends thereof are respectively fixed to the bottom surface of the bag setting portion 4a by fixing tools 10a such as bolts and rivets. It is fixed to.

  A support member 20 for supporting the bag 10 via the seat pan 4 is provided below the seat pan 4. As shown in FIG. 1, the support member 20 extends in the left-right direction of the base frame 1, and both left and right ends thereof are connected to the left and right side frames 2, 3 of the base frame 1. Examples of the method of connecting the support member 20 to the side frames 2 and 3 include, but are not limited to, welding, welding, or using a fastener such as a bolt or a rivet.

  As shown in FIG. 2, the support member 20 is installed at a predetermined distance from the lower surface of the seat pan 4 downward. In this embodiment, the support member 20 is located slightly in front of the bag installation portion 4a, and the upper surface of the support member 20 is an upward inclined surface. Accordingly, when the seat pan 4 bends downward, the front edge side of the bag setting portion 4a abuts on the support member 20, and the support member 20 supports the bag 10 from diagonally forward and downward via the bag setting portion 4a. Become.

  In the present invention, the distance between the upper surface of the support member 20 and the lower surface of the bag installation portion 4a is preferably 3 to 100 mm. When this interval is larger than 100 mm, the bag support effect by the support member 20 is significantly reduced. Moreover, when this space | interval becomes smaller than 3 mm, the cushion effect by this seat pan 4 will be impaired.

  A cushion member 30 made of urethane or the like is provided between the upper surface of the support member 20 and the lower surface of the bag installation portion 4a. However, the material of the cushion material 30 is not limited to this.

  Although not shown, in this embodiment, an inflator (gas generator) that supplies inflation gas to the bag 10 is installed in the seat pan 4, and the inflator and the bag 10 are connected via a duct. ing. However, this inflator may be disposed in the bag 10 like the passenger restraint device disclosed in Japanese Patent Application Laid-Open No. 10-217818.

  A harness for energizing the initiator (ignition device) of the inflator is connected to a control device (not shown) of the occupant restraint device. This control device activates the initiator based on a collision detection or prediction signal from a collision detection or prediction sensor installed on the vehicle body.

  Next, the operation of the occupant restraint device having such a configuration will be described.

  When the collision detection or prediction sensor detects or predicts a vehicle collision, the control device starts an inflator initiator based on a signal from the sensor, and gas is ejected from the inflator. Then, the gas from the inflator is supplied into the bag 10 so that the bag 10 starts to expand. The seat cushion 7 is pressed from below by the inflated bag 10. As a result, the seat cushion 7 is pushed up or compressed to increase the density, and forward movement of the occupant's waist is prevented or suppressed.

  At this time, as shown in FIGS. 3 (a) to 3 (b), the seat pan 4 on the lower side of the bag 10 bends downward due to the load from the occupant, and the bag installation portion 4a of the seat pan 4 is supported by the support member 20. Abut. As a result, the inflated bag 10 is supported from the diagonally lower front side by the support member 20 via the bag installation portion 4a, so that the bag 10 is firmly pushed forward without being pushed away by a load from the occupant. Movement can be restrained.

  In this occupant restraint device, the support member 20 of the bag 10 is provided on the lower side of the seat pan 4 so as to be separated from the seat pan 4, and the seat pan 4 can be bent downward accordingly. Due to the elasticity of the seat pan 4, the seat comfort when the bag 10 is not inflated is good.

  Further, since the cushion material 30 is provided between the seat pan 4 and the support member 20, it is possible to prevent a feeling of bottoming and the generation of abnormal noise when the seat pan 4 contacts the support member 20. Alleviated.

  In this embodiment, since the distance between the seat pan 4 and the support member 20 is 3 to 100 mm, the support effect of the bag 10 by the support member 20 is good and the cushion effect by the seat pan 4 is also good. It is.

  In this embodiment, the support member 20 extends in the left-right direction of the seat, and both end sides in the extending direction are connected to the left and right side frames 2, 3 of the base frame 1. The attachment strength to the seat is good, and the bag 10 can be supported over a wide range in the left-right width direction of the seat.

  FIG. 4 is a sectional view of a base frame of a seat provided with an occupant restraint device according to another embodiment when the bag is not inflated, and FIG. 5 is a sectional view of the base frame when the bag is inflated. FIG. 5 shows a state in which the bag is supported by the support member.

  Also in this embodiment, an inflatable bag 10 is installed on the seat pan 4 (in the bag installation portion 4a) so as to press the seat cushion 7 from below, and below the seat pan 4, A support member 20 for supporting the bag 10 via the seat pan 4 is installed. Further, the upper surface of the support member 20 is spaced downward by a predetermined distance from the lower surface of the seat pan 4 (bag installation portion 4a).

  In this embodiment, a guide 40 is provided for guiding the bag installation portion 4a of the seat pan 4 to approach the support member 20 when the seat pan 4 is bent downward.

  In this embodiment, the guide 40 has a cylindrical shaft portion 41. A flange 42 projects from the one end (upper end) side of the shaft portion 41 toward the side. Further, an elastic engagement portion 43 having a larger diameter than the shaft portion 41 is provided on the other end (lower end) side of the shaft portion 41.

  Guide insertion holes 4b and 20a (reference numerals omitted in FIG. 5) are respectively provided on the bottom surface of the bag installation portion 4a of the seat pan 4 and the upper surface of the support member 20 facing the bag installation portion 4a. The diameters of these guide insertion holes 4b and 20a are such that the shaft portion 41 can pass but the flange 42 cannot pass. The elastic engagement portion 43 can enter the guide insertion holes 4b and 20a by elastically reducing the diameter, and after passing through the guide insertion holes 4b and 20a, the elastic engagement portion 43 expands to its original size. It is configured so that it cannot be pulled out from the guide insertion holes 4b and 20a.

  From the upper side of the seat pan 4, the shaft portion 41 is pushed into the guide insertion holes 4 b and 20 a with the elastic engagement portion 43 as the head, and the elastic engagement portion 43 engages with the lower surface side of the support member 20. At the same time, the flange 42 overlaps the upper surface side of the bag setting portion 4a, whereby the seat pan 4 (bag setting portion 4a) and the support member 20 are connected via the guide 40.

  4 and 5, only one guide 40 is shown, but a plurality of guides 40 may be provided at different positions in the extending direction (left-right direction) of the support member 20. .

  The bag 10 is installed in the bag installation part 4a from above the flange 42.

  In this embodiment, the cushion material between the support member 20 and the seat pan 4 is omitted.

  The other structure of this embodiment is the same as that of the above-described embodiment shown in FIGS. 1 to 3. In FIGS. 4 and 5, the same reference numerals as those in FIGS.

  Even in this occupant restraint device, the support member 20 of the bag 10 is provided on the lower side of the seat pan 4 so as to be separated from the seat pan 4, and the seat pan 4 can be bent downward accordingly. Due to the elasticity of the seat pan 4, the seat comfort when the bag 10 is not inflated is good.

  In this embodiment, when the vehicle 10 collides head-on and the bag 10 is inflated, if the lower seat pan 4 of the bag 10 bends downward due to a load from the occupant, the bag installation portion of the seat pan 4 4a moves along the shaft portion 41 of the guide 40 and always comes into contact with the support member 20, so that the inflated bag 10 is reliably supported by the support member 20 via the bag installation portion 4a.

  Each of the above embodiments shows an example of the present invention, and the present invention is not limited to each of the above embodiments.

  For example, in each of the above embodiments, the bag 10 is installed on the seat pan 4, but the bag 10 may be installed on the seat spring 6. Further, the bag 10 may be installed directly on the seat pan 4 or the seat spring 6, and a retainer for holding the bag 10 is provided separately from the seat pan 4 and the seat spring 6. The bag 10 may be installed on the seat pan 4 or the seat spring 6. In this case, the bag 10 may be supported by the support member 20 via the seat pan 4 or the seat spring 6 and the retainer.

  The structures of the support member and the guide are not limited to those illustrated. Two or more support members may be provided.

It is a perspective view of a base frame of a seat provided with an occupant restraint device concerning an embodiment. It is sectional drawing which follows the II-II line of FIG. It is sectional drawing which shows the action | operation of the passenger | crew restraint apparatus of FIG. It is sectional drawing of the base frame of the sheet | seat provided with the passenger | crew restraint apparatus which concerns on another embodiment. It is sectional drawing which shows the action | operation of the passenger | crew restraint apparatus of FIG. It is sectional drawing of the passenger | crew restraint apparatus which concerns on a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base frame 2, 3 Side frame 4 Seat pan 5 Shaft 6 Seat spring 7 Seat cushion 10 Bag 20 Bearing member 30 Cushion material 40 Guide

Claims (11)

In an occupant restraint device including an inflatable bag that is installed on the upper side of a seat pan or a seat spring that supports the seat cushion and presses the seat cushion from the lower side,
The seat pan or seat spring can be flexed up and down elastically,
A support member for supporting the bag from below and / or from the front via the seat pan or seat spring is provided below the seat pan or seat spring.
The support member is spaced apart from the seat pan or seat spring;
The support member extends in the left-right direction of the seat, and both end sides in the extending direction are coupled to the seat frame of the seat,
An occupant restraint device, wherein a cushioning material is provided between the support member and the seat pan or seat spring. The occupant restraint apparatus according to claim 1, wherein the cushion material is made of urethane. In an occupant restraint device including an inflatable bag that is installed on the upper side of a seat pan or a seat spring that supports the seat cushion and presses the seat cushion from the lower side,
The seat pan or seat spring can be flexed up and down elastically,
A support member for supporting the bag from below and / or from the front via the seat pan or seat spring is provided below the seat pan or seat spring.
The support member is spaced apart from the seat pan or seat spring;
The support member extends in the left-right direction of the seat, and both end sides in the extending direction are coupled to the seat frame of the seat,
An occupant restraint provided with a guide for guiding a bag installation area of the seat pan or seat spring to approach the support member when the seat pan or seat spring is bent downward apparatus. The guide according to claim 1 or 2 , wherein when the seat pan or the seat spring is bent downward, a guide for guiding a bag installation area of the seat pan or the seat spring to approach the support member is provided. An occupant restraint device. According to claim 3 or 4, the guide, the are from the lower surface of the bag installation area of the seat pan or seat springs having a shaft portion extending toward the bearing member, the shaft portion, the extending direction thereof An occupant restraint device, wherein the support member penetrates the support member so as to be movable integrally with the seat pan or the seat spring . 6. The flange according to claim 5, wherein a flange protrudes laterally from the upper end side of the shaft portion, and an elastic engagement portion having a larger diameter than the shaft portion is provided on the lower end side of the shaft portion. And
A guide insertion hole is provided in each of the seat pan or the seat spring and the upper surface of the support member opposed to the seat pan, and the diameter of the guide insertion hole can pass through the shaft portion. Is a size that cannot pass,
The elastic engagement portion can enter the guide insertion hole by elastically reducing the diameter, and after passing through the guide insertion hole, the diameter is expanded to the original size and the guide insertion hole It is configured so that it cannot be pulled out,
From the upper side of the seat pan or seat spring, the shaft portion is pushed into each guide insertion hole with the elastic engagement portion at the top, and the elastic engagement portion engages with the lower surface side of the support member, and When the flange overlaps the upper surface side of the seat pan or seat spring, the seat pan or seat spring and the support member are connected via the guide,
The occupant restraint apparatus, wherein the bag is installed above the flange and above the seat pan or seat spring. The occupant restraint device according to any one of claims 1 to 6 , wherein a distance between the seat pan or the seat spring and the support member is 3 to 100 mm. In any one of Claims 1 thru | or 7 , this supporting member is arrange | positioned by shifting the intermediate position of the front-back direction ahead of the intermediate position of the front-back direction of the said bag,
The upper surface of the support member is an inclined surface with an upward slope toward the front,
The occupant restraint device , wherein when the seat pan or the seat spring is bent downward, the support member supports the bag from the front and lower side through the seat pan or the seat spring . The occupant restraint device according to any one of claims 1 to 8, wherein the bag is installed directly on the seat pan or a seat spring. The bag according to any one of claims 1 to 9, wherein the bag is installed on an upper side of the seat pan,
An occupant restraint device characterized in that the front edge side of the bag installation area of the seat pan is an inclined surface having an upward slope toward the front. The vehicle seat provided with the passenger | crew restraint apparatus of any one of Claim 1 thru | or 10 .

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