JP2016215843A - Air cushion device and vehicular seat comprising the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cushion device with a low-cost structure.SOLUTION: An air cushion device 20 comprises: a seat part air cushion 21 arranged at a seat part 2A for an occupant of a seat cushion 2; a bank part air cushion 22 arranged at a bank part 2B formed close to a door opening part of a vehicle of the seat cushion 2; and a communicating member 23 which communicates the seat part air cushion 21 with the bank part air cushion 22 so as to allow circulation of internal air. The seat part air cushion 21 may be constituted of a plurality of air cushions, and the bank part air cushion 22 may be arranged at a position higher than the seat part air cushion 21.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an air cushion device for a vehicle seat including a seat cushion and a seat back, and a vehicle seat including the same.

  2. Description of the Related Art A vehicle seat is used in which support portions (side support portions) for supporting a seat occupant's buttocks and thighs from both outsides are formed on both the left and right sides of a center portion of a seat cushion.

  In addition, each side support part is equipped with an air bag inside the side support part near the outside of the vehicle close to the opening / closing door of the vehicle, and also has a function of preventing a passenger from getting in and out while keeping a good cushion feeling. Sheets are also used. Furthermore, as such a vehicle seat, an air supply device connected to the outside of the air bag is controlled to adjust the amount of air supplied or the amount of air discharged outside. (For example, refer to Patent Document 1).

Japanese Patent Laying-Open No. 2015-3533

  However, it is expensive to provide an air supply device for supplying and discharging air.

  An object of this invention is to provide the air cushion apparatus which can be comprised cheaply, and a vehicle seat provided with the same.

In order to solve such a problem, the present invention provides an air cushion device provided in a vehicle seat including a seat cushion and a seat back.
A seat air cushion disposed in a seat of an occupant in the seat cushion;
A bank air cushion disposed on a bank formed near the door opening of the vehicle among the seat cushion;
A communication member that allows the air to flow through the seat portion air cushion and the bank portion air cushion;
It is characterized by providing.

  In this air cushion device, the amount of air in the air cushion is adjusted as the passenger moves. That is, when the occupant sits on the bank, a load is applied to the bank air cushion, and the air inside flows into the seat air cushion through the communication member, causing the bank air cushion to collapse and the height of the bank to rise. Go down. In addition, when the occupant moves from the bank of the seat cushion to the seat, the air in the seat air cushion flows into the bank air cushion, and the height of the bank air cushion increases while the seat surface decreases. . Therefore, without using an air supply device, it is possible to achieve a good cushion feeling and not to disturb boarding / exiting performance.

  The maximum capacity of the seat portion air cushion may be equal to or greater than a total amount of air inside the seat portion air cushion and the bank portion air cushion. In this case, the seat portion air cushion can include all the air inside the bank portion air cushion. Therefore, all the air inside the bank air cushion can be pushed out to the seat air cushion and crushed.

  The maximum capacity of the bank air cushion may be equal to or greater than the total amount of air inside the seat air cushion and the bank air cushion. The bank air cushion in this case can include all the air inside the seat air cushion. Therefore, all the internal air of the seat portion air cushion can be pushed into the bank portion air cushion and crushed.

  The seat air cushion may be composed of a plurality of air cushions. In such a case, the cushions can be dispersed and arranged.

  The said seat part air cushion may be comprised by the left-right paired air cushion arrange | positioned under the seat surface of the said seat part.

  The bank air cushion may be disposed at a position higher than the seat air cushion.

  The bank air cushion may be disposed in front of the seat air cushion in the vehicle traveling direction.

  Further, the air cushion device may include an elastic force applying member that acts to push internal air into one of the seat portion air cushion and the bank portion air cushion. When there is no load on the seat air cushion and the bank air cushion, the elastic force imparting member pushes the internal air into one of the air cushion and returns both air cushions to a predetermined default state.

  The vehicle seat according to the present invention includes the air cushion device as described above.

  According to the present invention, since the air amount of the air cushion can be adjusted by the movement of the occupant without using the air supply device, the air cushion device can be configured at low cost.

It is a perspective view which shows a part of vehicle seat provided with the air cushion apparatus which concerns on this invention. It is a figure which shows the outline of the cross-sectional structure in the II-II line | wire of FIG. It is a top view of the vehicle seat shown in FIG. It is a figure which shows the example of a form of a seat cushion and an air cushion apparatus at the time of a passenger | crew's seating. It is a figure which shows the example of a seat cushion at the time of a passenger | crew's boarding / alighting of a vehicle, and an air cushion apparatus. It is a perspective view showing an example of the conventional vehicle seat in the backseat of vehicles as a reference. It is a figure which expands and shows the left side seat cushion of the vehicle seat shown in FIG. It is a figure which shows the outline of the cross-sectional structure in the VIII-VIII line of FIG.

  Hereinafter, preferred embodiments of an air cushion device 20 and a vehicle seat 1 according to the present invention will be described in detail with reference to the drawings (see FIGS. 1 to 5 and the like). For reference, structural examples of a conventional vehicle seat 1 ′ are shown in FIGS. 6 to 8.

  The vehicle seat 1 includes a seat cushion 2 on which an occupant is seated and a seat back 3 that supports the back of the occupant. Although not particularly illustrated, the seat cushion 2 and the seat back 3 include a cushion material made of a foam, a trim cover that covers the surface of the cushion material, and the like. The seat back 3 is provided with a reclining mechanism as necessary. A bank portion 2B that rises higher than the seat portion 2A of the seat cushion 2 is formed near the door opening of the vehicle in the seat cushion 2 (see FIG. 2 and the like).

  The vehicle seat 1 is provided with an air cushion device 20 (see FIG. 2 and the like). In the present embodiment, the rear seat of a passenger car (such as a so-called 4-door car, a 5-door car, provided with open / close doors on both sides of the rear seat, or one side such as a one-side sliding door) The present invention will be described with reference to an example in which the present invention is applied to a vehicular seat 1 (see FIG. 1 and the like), which is applied to a front seat of a passenger car. It does not prevent.

  The air cushion device 20 includes a seat air cushion 21, a bank air cushion 22, and a communication tube 23 (see FIG. 2 and the like).

  The seat portion air cushion 21 is disposed below the seat surface 2S of the seat portion 2A in which the occupant sits in the seat cushion 2. Although FIG. 2 shows an example in which the seat air cushion 21 is arranged at the bottom of the seat cushion 2, this is only a preferred example, and the height (position in the vertical direction) of the seat air cushion 21 in the seat cushion 2 is There is no particular limitation. The seat air cushion 21 is formed of an airtight bag body that expands or contracts in response to the entry and exit of air.

  The bank air cushion 22 is disposed on the bank 2 </ b> B of the seat cushion 2. Although FIG. 2 shows an example in which the bank portion air cushion 22 is disposed slightly above the center in the height direction inside the bank portion 2B of the seat cushion 2, this is also only a preferred example. The bank air cushion 22, like the seat air cushion 21, is formed of an airtight bag body that expands or contracts in response to the entry and exit of air.

  The communication tube 23 allows the seat portion air cushion 21 and the bank portion air cushion 22 to communicate with each other and allows the flow of internal air (see FIGS. 2 and 3). For example, when a load is applied to the seat air cushion 21, the outflowed internal air flows into the bank air cushion 22 through the communication tube 23, the seat air cushion 21 is crushed, and the bank air cushion 22 is inflated (see FIG. 4). ). On the other hand, when a load acts on the bank air cushion 22, the outflowed internal air flows into the seat air cushion 21 through the communication tube 23, the bank air cushion 22 is crushed, and the seat air cushion 21 is inflated (see FIG. 5). ).

  As the communication tube 23, it is desirable to use a tube having rigidity that secures a circulation region even when a passenger's load acts. In addition, in order to prevent the seat portion air cushion 21 and the bank portion air cushion 22 from rapidly expanding or contracting, a communication tube 23 having an air resistance that appropriately restricts the flow rate of the internal air may be employed.

  The specific shapes and structures of the seat air cushion 21 and the bank air cushion 22 described above are not particularly limited, but for example, in the present embodiment, the seat air cushion constituted by a pair of air cushions. 21 is employed (see FIG. 3). The pair of air cushions 21a and 21b are symmetrically arranged on the left and right with respect to the center line C in the seat 2A so as to correspond to the occupant's buttocks and sciatica (see FIG. 4). The communication tube 23 branches in the middle and is connected to each of the air cushions 21a and 21b (see FIG. 3). Thus, when the seat part air cushion 21 is comprised by several air cushions, it can be set as the arrangement | positioning which distributed each air cushion to the desired location, and can also arrange | position with sufficient balance according to a passenger | crew's seating position. .

  The bank portion air cushion 22 has a seat portion air so that the cushion thickness from the surface (upper surface) of the bank portion 2B to the bank portion air cushion 22 is moderate in the bank portion 2B that rises higher than the seat portion 2A. It arrange | positions in the position higher than the cushion 21 (refer FIG. 2 etc.). Further, the bank air cushion 22 is disposed in front of the seat air cushion 21 in the vehicle traveling direction so that the bank 2B can easily support the periphery of the thigh of the occupant when the bank is inflated (see FIG. 3). .

  The bank air cushion 22 may have a large area (projected area from above). If the area of the air cushion increases, the amount of ups and downs by the same amount of air decreases as the area where the ups and downs increase. For example, the air cushion device 20 according to the present embodiment employs a bank air cushion 22 having a larger area than the seat air cushion 21 and narrower toward the front of the vehicle in accordance with the shape of the bank 2B ( (See FIG. 3).

  In addition, the seat portion air cushion 21 of the present embodiment has a maximum capacity equal to or greater than the total amount of air inside the seat portion air cushion 21 and the bank portion air cushion 22. Therefore, when a load is applied to the bank air cushion 22, the seat air cushion 21 can include all of the internal air that has flowed out of the bank air cushion 22, and the bank air cushion 22 is in a state where there is no air. It can be crushed (see FIG. 5).

  Similarly, the bank portion air cushion 22 of the present embodiment has a maximum capacity equal to or greater than the total amount of air inside the seat portion air cushion 21 and the bank portion air cushion 22. Therefore, when a load is applied to the seat air cushion 21, the bank air cushion 22 can include all of the internal air that has flowed out of the seat air cushion 21, and the seat air cushion 21 is in a state where there is no air. It can be crushed (see FIG. 4).

  According to the air cushion device 20 of the present embodiment described so far, when the occupant sits down on the bank portion 2B of the seat cushion 2 when getting off the vehicle or getting into the vehicle, a load acts on the bank air cushion 22. Since the air inside the air flows into the seat air cushion 21 through the communication tube 23, the bank air cushion 22 is crushed and the height of the bank 2B is lowered (see FIG. 5). If the bank part 2B is in the raised state, when a person with weak muscles such as an elderly person sits on the bank part 2B, the foot may not reach the ground and may become unstable, and a seat with a step While the movement to the portion 2A may be difficult (see FIGS. 6 to 8), according to the air cushion device 20 of the present embodiment, the raised bank portion 2B automatically sinks and becomes lower. For this reason, the legs easily reach the ground when sitting on the bank 2B, so that it is difficult to be in an unstable posture, and it is easy to move when moving to the seat 2A after sitting on the bank 2B.

  When the occupant sits on the seat portion 2A, the air of the seat portion air cushion 21 flows out, the seat surface 2S is lowered, and the hip portion sinks into an appropriate seating position. Functions as a side support that supports the periphery of the thigh of the occupant (see FIG. 4).

  Thus, according to the air cushion device 20 of the present embodiment, the air amount of the air cushion is automatically adjusted with the movement of the occupant. Moreover, the ease of getting on and off and the ease of use are improved without obstructing a good cushion feeling by using a simple and inexpensive configuration without using an air supply device.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, in the above-described embodiment, the case where the present invention is applied to the rear seat of a passenger car has been described with an example. However, as described above, this does not prevent the present invention from being applied to the front seat of a passenger car.

  In the above-described embodiment, the seat part air cushion 21 and the bank part air cushion 22 configured by a bag body that expands or contracts in response to the entry and exit of air has been described as an example. One or both of the seat portion air cushion 21 and the bank portion air cushion 22 can be configured by a bag body having elasticity exerted by a force applying member (not shown) or having elasticity. The elastic force applying member acts to push the internal air into one of the seat portion air cushion 21 and the bank portion air cushion 22. Therefore, when there is no load on the seat air cushion 21 and the bank air cushion 22, the elastic force applying member pushes the internal air into one of them, and maintains a predetermined default state in which the air pressure is suspended.

  Further, in the above-described embodiment, the communication tube 23 is provided so that the internal air can pass between the seat portion air cushion 21 and the bank portion air cushion 22, but this communication tube 23 is a member that communicates both air cushions. This is only a preferred example. For example, when a part of the seat air cushion 21 or the bank air cushion 22 is formed in a cylindrical shape and both the air cushions are directly connected, the cylindrical portion that communicates both the air cushions functions as a communication member. Can be regarded as doing.

  The present invention is suitable for application to an air cushion device for a vehicle seat including a seat cushion and a seat back and a vehicle seat including the same.

DESCRIPTION OF SYMBOLS 1 ... Vehicle seat 2 ... Seat cushion 2A ... Seat part 2B ... Bank part 2S ... Seat surface 3 of seat cushion ... Seat back 20 ... Air cushion device 21 ... Seat part air cushion 22 ... Bank part air cushion 23 ... Communication tube (communication member)

Claims (9)

In an air cushion device provided in a vehicle seat including a seat cushion and a seat back,
A seat air cushion disposed in a seat of an occupant in the seat cushion;
A bank air cushion disposed on a bank formed near the door opening of the vehicle among the seat cushion;
A communication member that allows the air to flow through the seat portion air cushion and the bank portion air cushion;
An air cushion device comprising:   2. The air cushion device according to claim 1, wherein a maximum capacity of the seat portion air cushion is equal to or greater than a total amount of air inside the seat portion air cushion and the bank portion air cushion.   2. The air cushion device according to claim 1, wherein a maximum capacity of the bank air cushion is equal to or greater than a total amount of air inside the seat air cushion and the bank air cushion.   The air cushion device according to any one of claims 1 to 3, wherein the seat portion air cushion includes a plurality of air cushions.   The air cushion device according to claim 4, wherein the seat air cushion includes a pair of left and right air cushions disposed below a seating surface of the seat.   The air cushion device according to any one of claims 1 to 5, wherein the bank air cushion is disposed at a position higher than the seat air cushion.   The air cushion device according to any one of claims 1 to 6, wherein the bank portion air cushion is disposed in front of the seat portion air cushion in the vehicle traveling direction.   The air cushion according to claim 1, further comprising an elastic force imparting member that acts to push internal air into one of the seat portion air cushion and the bank portion air cushion. apparatus.   A vehicle seat comprising the air cushion device according to any one of claims 1 to 8.

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