JP2017197000A - Seat and air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat which enables a head protection member to be stably expanded from a headrest and a seat back and sufficiently protect a head of a seating person regardless of the strength and direction of a collision.SOLUTION: A seat 1 includes: a gas supply device 14 provided at a headrest 12; and a head protection member 13 which is stored in the headrest 12, is expanded to a front side by a gas supplied from the gas supply device 14, and covers and protects a head B of a seating person A. The head protection member 13 has: a front surface part 40 which covers a front side of the head; left and right side surface parts 41 which cover sides of the head; and an upper surface part 42 which covers an upper side of the head. The upper surface part 42 and the front surface part 40 are configured to be expanded by the gas supplied from the gas supply device 14. A gas introduction part 50 is formed at a rear end part of the upper surface part 42. A gas passage 60 which extends from the gas introduction part 50 and reaches the front surface part 40 through the upper surface part 42 is formed at the upper surface part 42 and the front surface part 40.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a seat and an airbag apparatus.

  As a method of protecting the front surface of the head of a seated person of a vehicle, there is a method of deploying an airbag from a seat back or a headrest (see Patent Documents 1 and 2).

JP 2013-18378 A JP 2010-76640 A

  However, the technique of Patent Document 1 is to join the left and right airbags developed from the headrest with a hook-and-loop fastener on the front surface of the seated person's head, and depending on the strength and direction of the impact at the time of the collision of the vehicle, the hook-and-loop fastener May not be able to be joined, or the hook-and-loop fastener may come off even once joined. Thus, there is a possibility that the airbag cannot be stably formed with the hook-and-loop fastener.

  In the technique of Patent Document 2, the airbag is developed from one side of the seat back, and a seated person may jump out of the airbag depending on the strength and direction of the collision of the vehicle.

  The present application has been made in view of the above points, and can stably deploy the head protection member from the headrest or the seat back, and sufficiently protects the seated person's head regardless of the strength or direction of the collision. An object of the present invention is to provide a seat and an airbag device that can be used.

  As a result of intensive studies, the present inventors have assumed that the head protection member covers the front of the head, the left and right side portions, and the top of the head, and gas is applied to the upper surface portion and the front surface portion of the head protection member. It has been found that the above problem can be solved by forming a gas flow path from the introduction part to the front part through the upper part, and the present invention has been completed.

That is, the present invention includes the following aspects.
(1) A gas supply device provided in a seat back or a headrest, and a head that is accommodated in the seat back or the headrest and is deployed forward by a gas supply by the gas supply device to cover and protect the seated person's head A head protection member comprising: a front part covering the front of the head; left and right side parts covering the sides of the head; and an upper part covering the top of the head. And at least the upper surface portion and the front surface portion are configured to be able to bulge by supplying gas from the gas supply device, and a gas introduction portion for the gas is formed at a rear end portion of the upper surface portion, A sheet in which a gas flow path from the gas introduction part to the front part through the upper part is formed in the upper part and the front part.
(2) The side surface portion is configured to be able to bulge by supplying the gas, and a communication hole for allowing the gas of the front surface portion to flow into the side surface portion is provided between the front surface portion and the side surface portion. The sheet according to claim 1, wherein the sheet is formed.
(3) Gas inflow chambers along the gas flow path are formed on both the left and right sides of the gas flow path, and the gas in the gas flow path is between the gas flow path and the gas inflow chamber. The sheet according to (2), wherein a sub-communication hole for flowing into the gas inflow chamber is formed.
(4) The sheet according to (3), wherein the sub communication holes are formed at a plurality of locations.
(5) The sheet according to (3) or (4), wherein the sub communication hole is formed to be smaller than the communication hole.
(6) The gas is not supplied to the side surface portion, and one end of the side surface portion is connected to the front surface portion, and the other end is connected to the rear portion of the seat back, the headrest, or the head protection member. The sheet according to (1), wherein the sheet is formed in a band shape.
(7) The sheet according to any one of (1) to (6), wherein the head protection member is housed in a state of being wound upwardly from the front surface portion toward the upper surface portion.
(8) The seat according to any one of (1) to (7), further including a mechanism in which the seat back tilts forward when a forward force greater than an allowable value is applied to the seat back.
(9) An airbag apparatus comprising the seat head protecting member according to any one of (1) to (8) and an airbag provided in front of the seat.

  According to the present invention, the head protecting member can be stably deployed from the headrest and the seat back, and the seated person's head can be sufficiently protected regardless of the strength and direction of the collision.

It is a schematic diagram which shows an example of a structure of the sheet | seat of a normal time. It is the internal block diagram which looked at the headrest from back. It is a schematic diagram which shows the structure of the sheet | seat of the state which the head protection member of 1st Embodiment expand | deployed. It is a perspective view of the head protection member of a 1st embodiment. Fig.5 (a) is a schematic diagram of the XX cross section of the head protection member of FIG. FIG. 5B is a schematic diagram of a YY cross section of the head protecting member of FIG. FIG.5 (c) is a schematic diagram of the ZZ cross section of the head protection member of FIG. It is explanatory drawing which shows the state in which a head protection member is wound up and accommodated. It is a schematic diagram which shows the structure of the sheet | seat of the state which the head protection member of 2nd Embodiment expand | deployed. It is a perspective view of the head protection member of a 2nd embodiment. Fig.9 (a) is a schematic diagram of the PP cross section of the head protection member of FIG. FIG. 9B is a schematic diagram of a QQ cross section of the head protecting member of FIG. It is a schematic diagram which shows the structure of the sheet | seat of the state which the head protection member of 3rd Embodiment expand | deployed. It is a perspective view of the head protection member of a 3rd embodiment. It is explanatory drawing which shows the structure of the seat of a driver's seat. It is explanatory drawing which shows an example of the frame | skeleton structure of a sheet | seat. It is an enlarged view around the connection part of the frame structure of a sheet. It is a mimetic diagram showing composition of a sheet in the state where a seat back leans forward. FIG. 16A is an internal configuration diagram of a seat back with a built-in head protection member as viewed from the side. FIG. 16B is an internal configuration diagram of the seat back in which the head protecting member is incorporated as viewed from the rear. It is explanatory drawing which shows the other structure of a head protection member.

  The present invention will be specifically described below. In addition, the following embodiment is an illustration for demonstrating this invention, and this invention is not limited only to the embodiment. The same reference numerals are assigned to the same elements, and duplicate descriptions are omitted. In the drawings, positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings unless otherwise specified. Furthermore, the dimensional ratios in the drawings are not limited to the illustrated ratios.

(First embodiment)
FIG. 1 is a schematic diagram illustrating an example of a configuration of a sheet 1 according to the present embodiment. The seat 1 includes, for example, a seat cushion (seat portion) 10, a seat back (backrest portion) 11, a headrest 12, a head protection member 13 incorporated in the headrest 12, a gas supply device 14, and the like. .

  As shown in FIGS. 1 and 2, the headrest 12 includes a head protection member 13 and a gas supply device 14. When an impact is detected by a sensor (not shown), the gas supply device 14 can supply gas to the head protection member 13 and expand and bulge the head protection member 13. In addition, the kind of gas is not specifically limited.

  The head protecting member 13 is made of resin, for example. As shown in FIG. 3, the head protection member 13 is formed so as to cover the entire head B of the seated person A and to have a substantially hemispherical dome shape with the lower side opened. For example, as shown in FIG. 4, the head protection member 13 includes a front surface portion 40 that covers the front of the head B, a side surface portion 41 that covers the left and right sides of the head B, and an upper surface portion that covers the top of the head B. 42, and these are expanded by the supply of the gas 15 by the gas supply device 14. The upper surface portion 42, the front surface portion 40, and the side surface portion 41 are each formed in a bag shape and configured to be able to bulge independently (see FIGS. 5A and 5B). The upper surface portion 42 and the side surface portion 41 are not in direct communication.

  As shown in FIG. 4, a gas introduction part 50 communicating with the gas supply device 14 is formed at the rear end of the upper surface part 42. In the upper surface portion 42 and the front surface portion 40, a gas flow path 60 extending from the gas introduction portion 50 through the upper surface portion 42 to the front surface portion 40 is formed.

  A communication hole 70 for allowing the gas 15 of the front surface portion 40 to flow into the side surface portion 41 between the front surface portion 40 and the side surface portion 41, that is, at the lower end portion of the front surface portion 40 and at the front end portion of the side surface portion 41. Is formed (see FIG. 5C). Therefore, when the gas 15 is introduced from the gas introduction part 50, the gas 15 flows through the gas flow path 60 from the upper surface part 42 to the front surface part 40, and the upper surface part 42 and the front surface part 40 swell, and then the gas 15 Flows into the left and right side portions 41 through the communication hole 70, and the side portions 41 bulge out.

  As shown in FIG. 6, the head protection member 13 is accommodated in the headrest 12 in a state of being wound upward (in the direction of the arrow in FIG. 6) from the front surface portion 40 toward the upper surface portion 42 in a normal state (before deployment). ing. Therefore, when the gas 15 is introduced from the gas introduction part 50, the head protection member 13 rotates and rotates downward (in the direction opposite to the arrow in FIG. 6).

  Next, the operation of the seat 1 will be described. First, as shown in FIG. 1, the head protection member 13 is accommodated in the headrest 12 at normal times. When an impact greater than a predetermined threshold is received due to a vehicle collision or the like, the sensor detects this and the gas supply device 14 operates, and the gas 15 is supplied from the gas supply device 14 to the head protection member 13.

  In the head protection member 13, as shown in FIG. 4, the gas 15 is introduced from the gas introduction part 50, and the gas 15 is supplied in this order to the upper surface part 42 and the front surface part 40 through the gas flow path 60. The member 13 expands downward (opposite to the arrow in FIG. 6). When the upper surface portion 42 and the front surface portion 40 bulge, the gas 15 is supplied from the front surface portion 40 to the left and right side surface portions 41 through the communication holes 70, and the side surface portion 41 expands and expands. In this way, as shown in FIG. 3, the entire upper surface portion 42, front surface portion 40 and side surface portion 41 bulge out, and the entire head B of the seated person A is covered and protected by the head protection member 13.

  According to the present embodiment, the head protection member 13 includes a front part 40 that covers the front of the head B of the seated person A, left and right side parts 41 that cover the sides of the head B, and the head B Since the gas flow path 60 from the gas introduction part 50 to the front part 40 through the upper part 42 is formed in the upper part 42 and the front part 40, the gas 15 is gasified during deployment. By supplying the gas flow path 60 from the introduction part 50, the head protection member 13 can be stably developed. Further, since the head B of the seated person A is always in the head protection member 13, the head B of the seated person A can be sufficiently protected regardless of the strength and direction of the collision.

  Further, since the side surface portion 41 is configured to be swellable by supplying the gas 15 and the communication hole 70 is formed between the front surface portion 40 and the side surface portion 41, the upper surface portion 42, the front surface portion 40, and the side surface portion 41. The head protecting member 13 can be developed in the order of. Accordingly, the side surface portion 41 is not first expanded, and the upper surface portion 42 can be prevented from falling and hitting the head B of the seated person A during the expansion, so that the head protection member 13 can be stably expanded. Can be done.

  Since the head protection member 13 is housed in the headrest 12 in a state of being wound upwardly from the front surface portion 40 toward the upper surface portion 42, the head protection member 13 reliably passes over the head B of the seated person A when deployed. . As a result, the head protection member 13 can be deployed more stably.

(Second Embodiment)
The head protecting member 13 in the first embodiment may have gas inflow chambers 80 on both the left and right sides of the gas flow path 60 as shown in FIGS. In this case, for example, the lateral width of the gas flow path 60 in the upper surface portion 42 is narrowed, and the gas inflow chambers 80 are provided on both sides thereof. The gas inflow chamber 80 is formed from, for example, the vicinity of the rear end of the upper surface portion 42 to the vicinity of the front surface portion 40 along the gas flow path 60. The gas inflow chamber 80 is formed to be thinner (smaller in volume) than the gas flow path 60. Between the gas flow path 60 and the gas inflow chamber 80, a plurality of sub communication holes 90 for allowing the gas 15 in the gas flow path 60 to flow into the gas inflow chamber 80 are formed. The sub communication holes 90 are formed at a plurality of locations. The sub-communication holes 90 are respectively formed in the front part and the rear part with respect to the center of the upper surface part 42, for example. The sub communication holes 90 are arranged at approximately equal intervals along the gas flow path 60. The gas inflow chamber 80 is configured to be able to bulge independently of other portions (the gas flow path 60, the front surface portion 40, and the side surface portion 41 of the upper surface portion 42). The gas inflow chamber 80 does not directly communicate with the side surface portion 42 and the front surface portion 40.

  When the head protection member 13 is deployed, first, the gas 15 introduced from the gas introduction part 50 flows into the front part 40 from the upper part 42 through the gas flow path 60, and the upper part 42 and the front part 40 expands and bulges. Next, the gas 15 in the front surface portion 40 flows into the side surface portion 41 through the communication hole 70, and the side surface portion 41 expands and expands. When the side surface 41 is filled with the gas 15 and the pressure of the gas flow path 60 increases, the gas 15 in the gas flow path 60 enters the gas inflow chamber 80 through the sub communication hole 90 and the gas inflow chamber 80 expands. Thus, the deployment of the head protecting member 13 is completed.

  According to the present embodiment, since the gas flow path 60 is formed in the head protection member 13, the head protection member 13 can be stably deployed from the headrest 12. Further, since the head B of the seated person A is always in the head protection member 13, the head B of the seated person A can be sufficiently protected regardless of the strength and direction of the collision. Further, since the volume of the gas flow path 60 in the head protection member 13 is reduced by the amount of the gas inflow chamber 80, the gas 15 is quickly filled in the upper surface portion 42, the front surface portion 40, and the side surface portion 41. The side part 41 can be deployed faster.

  In addition, since the sub-communication holes 90 are formed at a plurality of locations, the gas 15 can be flowed from the gas flow path 60 to the gas inflow chamber 80 promptly without any deviation.

  Since the sub communication hole 90 is formed to be smaller than the communication hole 70, the inflow of gas from the front surface portion 40 to the side surface portion 41 is promoted preferentially, and the side surface portion 41 is surely more than the gas inflow chamber 80. Bulge first. Therefore, the deployment of the head protecting member 13 is more stable.

(Third embodiment)
The side surface portion 41 of the head protecting member 13 in the first embodiment is not bulged, but one end is connected to the front surface portion 40 and the other end is connected to the headrest 12 as shown in FIGS. 10 and 11. It may be formed in a strip shape. In such a case, the side surface portion 41 may be formed in a sufficiently strong cloth or rubber rectangular band shape. Moreover, the side part 41 may be formed in mesh shape.

  When the head protection member 13 is deployed, the gas 15 introduced from the gas introduction part 50 flows into the front part 40 from the upper part 42 through the gas flow path 60, and the upper part 42 and the front part 40. Expands and bulges. At this time, the side surface portion 41 is also pulled by the front surface portion 40 and developed.

  According to the present embodiment, since the gas flow path 60 is formed in the head protection member 13, the head protection member 13 can be stably deployed from the headrest 12. Further, since the head B of the seated person A is always in the head protection member 13, the head B of the seated person A can be sufficiently protected regardless of the strength and direction of the collision. Further, since the gas inflow volume of the entire head protection member 13 is reduced by the amount of gas not flowing into the side surface portion 41, the gas 15 is quickly filled in the upper surface portion 42 and the front surface portion 40, and the head protection member 13 is expanded faster. it can.

(Fourth embodiment)
In the above embodiment, the seat 1 may have a mechanism in which the seat back 11 tilts forward when a forward force greater than a predetermined allowable value is applied to the seat back 11. Hereinafter, an example of such a mechanism will be described.

  FIG. 12 shows an example of the seat 1 of the driver's seat of the vehicle. A steering wheel 100 is disposed in front of the seat 1, and the steering wheel 100 expands to the seat 1 side when an impact is detected. The airbag 101 to be taken out is incorporated. In the present embodiment, the head protection member 13 and the airbag 101 of the steering wheel 100 constitute an airbag apparatus.

  FIG. 13 shows an example of the skeleton structure of the sheet 1. The seat 1 includes a seat cushion frame 110 and a seat back frame 111. The seat cushion frame 110 and the seat back frame 111 are connected via a connecting portion 112.

  A retractor 121 that winds up the seat belt 120 is attached to the seat back frame 111. The retractor 121 is configured to lock the seat belt 120 and prevent the seat belt 120 from being extended when a forward inertia acts on the seated person A due to a sudden deceleration of the vehicle such as a collision. As a result, a forward load applied to the seated person A is also applied to the seat back frame 111 via the seat belt 120.

  The connecting part 112 has a force limiter part 130. As shown in FIG. 14, the force limiter unit 130 includes a shaft 140 fixed to the seat cushion frame 110 side and a bracket 141 fixed to the seat back frame 111 side. The shaft 140 and the bracket 141 have cylindrical shapes with different diameters, and the shaft 140 is disposed in the bracket 141 so as to be coaxial with the bracket 141. The shaft 140 and the bracket 141 are fixed to each other by welding or the like, but the shaft 140 is configured to be plastically deformed and twisted around the axis when a rotational load exceeding an allowable value is applied. When the shaft 140 is twisted, the bracket 141 and the seat back frame 111 fixed thereto rotate around the axis. Therefore, when the seat back frame 111 is pulled forward by the seat belt 120 and a load greater than a predetermined allowable value is applied to the seat back frame 111, the shaft 140 is not endured and plastically deforms, and the seat back frame 111, That is, the seat back 11 tilts forward.

  When an impact such as a collision is detected, the head holding member 13 expands and bulges as shown in FIG. 15 as described above, and the entire head B of the seated person A, that is, the head B Covers the front, left and right sides and top. In the steering wheel 100, the airbag 101 expands and expands toward the seat 1 side.

  Then, the forward inertia at the time of collision acts on the seated person A, and when the seated person A moves forward, the seat belt 120 is pulled forward, and a forward load acts on the seat back 11. When the load exceeds the allowable value, the shaft 140 of the force limiter unit 130 is plastically deformed and twisted around the axis, and the seat back 11 tilts forward. At the time of plastic deformation of the shaft 140, a part of the energy for the seated person A to move forward is consumed by inertia at the time of collision.

  When the seat back 11 is tilted forward, the front surface portion 40 of the head protection member 13 hits the airbag 101, and energy to move forward of the seated person A (head B) is caused by the head protection member 13 and the airbag 101. Absorbed.

  According to the present embodiment, since the seat 1 has a mechanism in which the seat back 11 is tilted forward by applying a forward force greater than the allowable value to the seat back 11, the seat back 11 is moved forward in the event of a collision. The head protection member 13 is moved forward by that amount, and the head protection member 13 comes into contact with the airbag 101 reliably. Therefore, the impact received by the seated person A due to the action of the head protecting member 13 and the airbag 101 can be effectively and sufficiently absorbed. Further, at the time of an oblique collision, the occupant A moves obliquely forward due to inertia, and the head B of the occupant A collides obliquely with the airbag, so that a rotational force is applied to the head B and the neck may be twisted. However, in the present embodiment, since the head B of the seated person A hits the airbag 101 via the head protection member 13, the neck can be prevented from being twisted.

  In the above embodiment, the head protection member 13 is accommodated in the headrest 12 and is projected out of the headrest 12 when it receives an impact, and is developed as shown in FIGS. 16 (a) and 16 (b). As shown, the seat back 11 may be accommodated. In such a case, the head protection member 13 and the gas supply device 14 are built in the upper portion of the seat back 11, and when an impact is detected, gas is introduced from the gas supply device 14 to the head protection member 13, and the head The protective member 13 protrudes upward from the rear side of the seat back 11 and expands.

  When the head protecting member 13 is built in the upper portion of the seat back 11, the side portion 41 of the head protecting member 13 shown in the third embodiment has one end on the head as shown in FIG. It may be connected to the front surface portion 40 of the head protection member 13 and the other end may be connected to the rear portion 43 of the head protection member 13. In this case, at the time of deployment, the head protection member 13 protrudes from the upper end of the seat back 11, passes through the back surface of the headrest 12, and deploys in front of the headrest 12. At this time, the front surface portion 40 bulges out and the rear portion 43 remains on the headrest 12 side, so that the side surface portion 41 can be suitably deployed between the front surface portion 40 and the rear portion 43.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the idea described in the claims, and these naturally belong to the technical scope of the present invention. It is understood.

  For example, the seat 1 described in the above embodiment is not limited to the driver's seat, and may be applied to a passenger seat, a rear seat, and the like of the vehicle. The shape and size of the head protecting member 13 are not limited to this. The structure and shape of the cushion seat 10, the seat back 11, the headrest 12, etc. of the seat 1 are not limited to this, and the headrest 12 and the seatback 11 may be integrated. In the above embodiment, the force limiter unit 130 has applied a forward force exceeding the allowable value to realize a mechanism in which the seat back 11 is tilted forward. However, a similar mechanism is realized with other known configurations. Also good. Further, the seat 1 of the present invention can be applied to a general seat back having no forward tilt mechanism of the seat back 11.

  The present invention is useful when the head protection member is stably deployed from the headrest or the seat back, and sufficiently protects the seated person's head regardless of the strength or direction of the collision.

DESCRIPTION OF SYMBOLS 1 Seat 11 Seat back 12 Headrest 13 Head protection member 14 Gas supply apparatus 15 Gas 40 Front part 41 Side part 42 Upper surface part 50 Gas introduction part 60 Gas flow path 70 Communication hole A Seated person B Head

Claims (9)

A gas supply device provided in the seat back or headrest;
A head protection member that is housed in the seat back or the headrest and that extends forward by the gas supply by the gas supply device and covers and protects the seated person's head;
The head protecting member has a front surface portion covering the front of the head, left and right side surfaces covering the side of the head, and an upper surface portion covering the top of the head.
At least the upper surface portion and the front surface portion are configured to be swellable by gas supply by the gas supply device,
A gas introduction portion for the gas is formed at a rear end portion of the upper surface portion,
A sheet in which a gas flow path is formed in the upper surface portion and the front surface portion from the gas introduction portion to the front surface portion through the upper surface portion. The side portion is configured to be swellable by supplying the gas,
The sheet according to claim 1, wherein a communication hole is formed between the front surface portion and the side surface portion for allowing the gas of the front surface portion to flow into the side surface portion. Gas inflow chambers along the gas flow path are formed on both the left and right sides of the gas flow path,
The seat according to claim 2, wherein a sub-communication hole is formed between the gas flow path and the gas inflow chamber for allowing the gas in the gas flow path to flow into the gas inflow chamber.   The sheet according to claim 3, wherein the sub-communication holes are formed at a plurality of locations.   The sheet according to claim 3 or 4, wherein the sub communication hole is formed to be smaller than the communication hole. The side portion is not supplied with the gas,
2. The seat according to claim 1, wherein the side portion is formed in a band shape in which one end is connected to the front portion and the other end is connected to a rear portion of the seat back, the headrest, or the head protection member.   The sheet according to any one of claims 1 to 6, wherein the head protecting member is housed in a state of being wound upwardly from the front surface portion toward the upper surface portion.   The seat according to any one of claims 1 to 7, further comprising a mechanism in which the seat back tilts forward by applying a forward force greater than an allowable value to the seat back. A head protecting member for a sheet according to any one of claims 1 to 8,
An airbag device comprising: an airbag provided in front of the seat.

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