JP2018183332A - Seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat for a vehicle, capable of retaining a shape further along the body shape of a seated person.SOLUTION: A control device executes shape memory treatment of discharging air from an expandable bag followed by discharging air from a bag body. With this, a seated person sinks in a cushion pad when air is discharged from the expandable bag 7. The cushion pad receives a loading due to sinking of the seated person. A granular material stored in the bag body moves in the bag body together with sinking of the seated person, and forms a shape so as to be along the body shape of the seated person. Therefore, a seat for a vehicle, retaining a shape further along the body shape of the seated person can be obtained.SELECTED DRAWING: Figure 5

Description

  The present application relates to a seat including a seat pad.

  For example, in the vehicle seat disclosed in Patent Document 1, a bag body in which a large number of granular materials are stored is disposed on a cushion pad. The bag body is a member capable of holding a shape that conforms to the shape of the buttocks of the seated person.

  That is, in a state where a fluid such as air is sealed in the bag body, a large number of granular materials can freely move within the bag body. When the seated person sits on the vehicle seat in this state, the granular material stored in the bag moves within the bag so as to form a shape that conforms to the hip shape of the seated person.

  And when air in a bag body is discharged in the state where a granular material moved so that a seated person's buttocks shape was followed, and the pressure in the said bag body fell, it will wither so that a bag may stick to granular material by atmospheric pressure. The shape that follows the buttocks shape of the seated person is maintained.

JP 2016-168198 A

  The present application provides a seat that can hold a shape along the body shape of the seated person.

  This application is the indication based on the examination examination result by an inventor. That is, the inventor stated, “For example, in a seat in which a bag body (9) is disposed on a cushion pad, even if a seated person sits on the seat, the granular material stored in the bag body (9). I found it difficult to move. "

  The seat is provided on the seat pad (5A), and an inflatable bag (7) whose volume is reduced and expanded as fluid flows in and out, and a bag disposed on the skin (5B) side from the inflatable bag (7). The body (9), in which a large number of granular materials are housed, and a fluid (9) in which fluid can flow in and out of the interior, the fluid in the expansion bag (7) and the bag body (9) A control device (20) for controlling inflow and inflow, wherein a control device (20) capable of executing a shape memory process for discharging the fluid from the bag body (9) after discharging the fluid from the expansion bag (7); Is provided.

  Thereby, when the fluid is discharged from the expansion bag (7), the seated person sinks into the seat pad (5A). The seat pad (5A) receives a load due to the "sinking of the seated person". The granular material stored in the bag body (9) moves in the bag body (9) together with the “sink of the seated person” and forms a shape along the body shape of the seated person. Therefore, it is possible to obtain a seat that can hold a shape that is more in line with the body shape of the seated person.

The present application may be configured as follows.
The control device (20) can execute determination processing for determining whether or not a pressing force larger than a predetermined pressing force determined in advance has acted on the skin (5B). Further, the control device (20) When it is determined by the determination process that a pressing force larger than the predetermined pressing force has acted on the skin (5B), it is desirable to execute the shape memory processing. This makes it possible to reliably obtain a shape along the body shape of the seated person.

  A portion (10A) that supports the end side of the bag body (9) in the seat pad (5A) when the direction parallel to the direction from the expansion bag (7A) toward the bag body (9A) is defined as the pressing direction. Is preferably provided with a tapered portion (11A) inclined with respect to the pressing direction.

  As a result, when the fluid is discharged from the expansion bag (7), it is possible to induce the movement of the granular material like an avalanche, so it is possible to quickly obtain the shape along the body shape of the seated person It becomes.

  Incidentally, the reference numerals in the above parentheses are examples showing the correspondence with the specific configurations described in the embodiments described later, and the present invention is limited to the specific configurations indicated by the reference numerals in the parentheses. It is not something.

1 is an external view of a vehicle seat according to an embodiment of the present invention. It is sectional drawing of the seat cushion 5 which concerns on embodiment of this invention. It is a figure which shows arrangement | positioning of the expansion bag 7 and the bag body 9 in the seat cushion 5 which concerns on embodiment of this invention. It is a control system block diagram in the vehicle seat which concerns on embodiment of this invention. It is a flowchart which shows control of the vehicle seat which concerns on embodiment of this invention.

  The “embodiment of the invention” described below shows an example of an embodiment belonging to the technical scope of the present invention. In other words, the invention specific items described in the claims are not limited to the specific configurations and structures shown in the following embodiments.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the arrow etc. which show the direction attached | subjected to each figure are described in order to make it easy to understand the relationship between each figure. The present invention is not limited to the directions given in the drawings.

  At least one member or part described with at least a reference numeral is provided, except where “one” or the like is omitted. That is, when there is no notice such as “one”, two or more members may be provided.

As used herein, the term “seated person” refers to a vehicle occupant or a person who uses a vehicle seat. Therefore, the seated person includes those who are not actually seated.
(First embodiment)
1. Outline of Seat In this embodiment, the seat according to the present invention is applied to the vehicle seat 1 for a vehicle shown in FIG. The vehicle seat 1 includes a seat back 3 and a seat cushion 5. The seat back 3 is a part that supports the back of the seated person.

  The seat cushion 5 is a part that supports the buttocks of the seated person. As shown in FIG. 2, the seat cushion 5 includes a cushion pad 5A, a skin 5B, and the like. The cushion pad 5A is an elastically deformable member such as urethane.

  The skin 5B is a member that covers the surface of the cushion pad 5A. The skin 5B is made of natural leather, synthetic leather, fabric, or the like. The surface of the cushion pad 5 </ b> A refers to a portion that can be visually recognized when a seated person uses the vehicle seat 1.

The cushion pad 5A is an example of a seat pad. The seat pad for the seat back 3 is called a back pad.
2. Structure of Seat Cushion As shown in FIG. 2, at least one inflatable bag 7 and a bag body 9 are provided on the cushion pad 5 </ b> A. The expansion bag 7 is a bladder whose volume decreases and expands when fluid flows in and out. A compressive fluid such as air flows in and out of the expansion bag 7 according to the present embodiment.

  The vehicle seat 1 according to the present embodiment has a plurality of inflatable bags 7A to 7D. As shown in FIG. 3, the inflatable bags 7 </ b> A and 7 </ b> B are disposed at a substantially central portion in the width direction of the seat cushion 5. The inflatable bags 7C and 7D are disposed on one end side and the other end side in the width direction of the seat cushion 5, respectively. Hereinafter, the plurality of inflatable bags 7A to 7D are collectively referred to as an inflatable bag 7.

  The bag body 9 is a flexible bag in which a large number of granular materials are housed. A fluid flows into and out of the bag 9. In the present embodiment, a compressive fluid such as air is used as the fluid.

  For this reason, in the state in which the fluid is sealed in the bag body 9, a large number of granular materials can freely move within the bag body 9. When the seated person sits on the vehicle seat 1 in this state, the granular material stored in the bag body 9 moves within the bag body so as to form a shape that conforms to the hip shape of the seated person.

  And if the fluid in the bag body 9 is discharged | emitted in the state which the granular material moved so that a seated person's buttocks shape may be followed, and the pressure in the said bag body 9 will fall, the bag body 9 will contact | adhere to a granular material by atmospheric pressure. Therefore, the shape that follows the buttocks shape of the seated person is maintained.

  In addition, the vehicle seat 1 according to the present embodiment includes a plurality of bag bodies 9A to 9C. The bag body 9 </ b> A is disposed at a substantially central portion in the width direction of the seat cushion 5. The bag bodies 9B and 9C are disposed on one end side and the other end side in the width direction of the seat cushion 5, respectively. Hereinafter, when collectively referring to the plurality of bag bodies 9A to 9C, they are referred to as a bag body 9.

  As shown in FIG. 2, the bag body 9 is disposed closer to the skin 5 </ b> B than the inflatable bag 7. That is, the skin 5B, the bag body 9, the inflatable bag 7, and the cushion pad 5A are arranged in the order of the skin 5B, the bag body 9, the inflatable bag 7, and the cushion pad 5A in this order from the skin 5B side.

  Tapered portions 11A and 11B that are inclined with respect to the pressing direction are provided at portions 10A and 10B that support the end side of the bag 9A in the cushion pad 5A. The pressing direction refers to a direction parallel to the direction from the expansion bag 7 side toward the bag body 9 side. That is, the “pressing direction” in the portions 10A and 10B substantially matches the vertical direction.

  Accordingly, the tapered portions 11A and 11B are inclined surfaces inclined with respect to the vertical direction. The taper portions 11A and 11B are inclined such that the lower side is closer to the central portion side of the bag body 9A than the upper side.

  Specifically, the taper portion 11A located on one end side in the sheet width direction of the bag body 9A has the upper end side positioned on one end side in the sheet width direction (the right end side in FIG. 2), and the lower end side in the sheet width direction from the upper end. It inclines so that it may be located in the other end side (left end side in FIG. 2).

  The taper portion 11B located on the other end side in the sheet width direction of the bag body 9A has an upper end side located on the other end side in the sheet width direction (left end side in FIG. 2), and a lower end side on one end side in the sheet width direction from the upper end ( In FIG. 2, it is inclined so as to be located on the right end side).

  In the present embodiment, portions 10C and 10D that support the substantially center in the width direction of the bag body 9A in the cushion pad 5A are also provided with tapered portions 11C and 11D that are inclined with respect to the pressing direction. The tapered portions 11C and 11D are inclined surfaces based on the same technical idea as the tapered portions 11A and 11B.

  That is, the bag body 9A is divided into two bag bodies 9A1 and 9A2 substantially at the center in the width direction. Part 10C supports the end side of bag 9A1. Part 10D supports the end side of bag body 9A2.

  The taper portion 11C is inclined such that the lower side is closer to the center side of the bag body 9A1 than the upper side. The taper portion 11D is inclined so that the lower side is closer to the center side of the bag body 9A2 than the upper side.

  Specifically, the taper portion 11C located on the other end side in the sheet width direction of the bag body 9A1 has the upper end side positioned on the other end side in the sheet width direction (left end side in FIG. 2), and the lower end side is the sheet from the upper end. It inclines so that it may be located in the width direction one end side (right end side in FIG. 2).

  The taper portion 11D located on one end side in the sheet width direction of the bag body 9A2 has an upper end side located on one end side in the sheet width direction (right end side in FIG. 2) and a lower end side on the other end side in the sheet width direction from the upper end (see FIG. 2 is inclined so as to be located on the left end side).

  Tapered portions 11E and 11F that are inclined with respect to the pressing direction are also provided in the portions 10E and 10F that support the end portions of the bag bodies 9B and 9C in the cushion pad 5A. The tapered portions 11E and 11F are inclined surfaces based on the same technical idea as the tapered portions 11A and 11B. In addition, the pressing direction in the parts 10E and 10F is a direction inclined by approximately 45 degrees with respect to the vertical direction (vertical direction).

  The taper portion 11E located on the other end side in the sheet width direction of the bag body 9C has an upper end side located on the other end side in the sheet width direction (left end side in FIG. 2), and a lower end side on one end side in the sheet width direction from the upper end ( In FIG. 2, it is inclined so as to be located on the right end side).

  The taper portion 11F located on one end side in the sheet width direction of the bag body 9B has an upper end side located on one end side in the sheet width direction (right end side in FIG. 2), and a lower end side on the other end side in the sheet width direction (see FIG. 2 is inclined so as to be located on the left end side).

3. 3. Control of Expansion Bag and Bag Body 3.1 Outline of Control The fluid flowing into and out of the expansion bag 7 is controlled by the first valve V1 and the first pump P1 shown in FIG. The first valve V1 controls the communication state between the expansion bag 7 and the atmosphere side. In the state where the first valve V1 is opened, the inside of the expansion bag 7 is in communication with the atmosphere side. The first pump P1 supplies a fluid (in this embodiment, air) into the expansion bag 7.

  The fluid flowing into and out of the bag body 9 is controlled by the second valve V2 and the second pump P2 shown in FIG. The first valve V1 controls communication between the bag body 9, the atmosphere side, and the suction side of the second pump P2. The second pump P2 sucks fluid (air in the present embodiment) from the bag body 9.

  The operation of the first valve V1, the second valve V2, the first pump P1 and the second pump P2, that is, the fluid inflow / outflow of the expansion bag 7 and the bag body 9 is controlled by the control device 20. The control device 20 is a microcomputer having a ROM, a RAM, a CPU, and the like.

  The control device 20 controls the operations of the first valve V1, the second valve V2, the first pump P1, and the second pump P2 according to a program stored in advance in a nonvolatile storage unit such as a ROM. An output signal from the seating sensor S1 is input to the control device 20. The seating sensor S1 directly or indirectly detects the pressing force acting on the skin 5B.

  Then, the control device 20 uses the detection signal of the seating sensor S1 to determine whether or not a pressing force larger than a predetermined pressing force is applied to the skin 5B, that is, the seated person is seated on the vehicle seat 1. Judgment processing (also referred to as seating confirmation processing) is performed to determine whether or not it has been performed.

  When the controller 20 determines that a pressing force larger than a predetermined pressing force has acted on the skin 5B, that is, the seating confirmation processing determines that the seated person is seated on the vehicle seat 1, the control device 20 executes the shape memory processing. In the shape memory process, the control device 20 discharges air from the bag body 9 after discharging air from the expansion bag 7.

3.2 Details of control (see Fig. 5)
When a start switch (not shown) is turned on, the control device 20 reads a program for executing a control flow (hereinafter referred to as shape memory control) shown in FIG. Start up. The start switch is a switch for enabling electric power to be supplied to a vehicle-mounted device such as an ignition switch.

  When the shape memory control is activated, the control device 20 closes the first valve V1 and operates the first pump P1 to fill the expansion bag 7 with air (S1, S3). Next, the control device 20 opens the second valve V2 to make the inside of the bag body 9 communicate with the atmosphere side (S5). Thereby, since air flows in into the bag body 9, the granular material in the said bag body 9 will be in the state which can move.

  After opening the second valve V2 (S5), the control device 20 executes a seating confirmation process (S7). If the seating of the seated person cannot be confirmed (S7: NO), the control device 20 executes S1.

  When the seating of the seated person can be confirmed (S7: YES), the control device 20 opens the first valve V1 to connect the inside of the inflatable bag 7 and the atmosphere side (S9), and then is determined in advance. Wait until the predetermined time elapses (S11). As a result, air escapes from the inside of the inflatable bag 7 and the seated person sinks into the cushion pad 5A, and the granular body in the bag body 9 moves so as to follow the shape of the buttocks of the seated person.

  The control device 20 operates the second pump P2 when a predetermined time has elapsed and sucks the air in the bag body 9 (S13). Thereby, the atmospheric | air pressure in the bag body 9 becomes lower than atmospheric pressure, and the bag body 9 is deflated so that it may closely_contact | adhere to a granular material by atmospheric pressure.

  Next, the control apparatus 20 closes the 2nd valve | bulb V2, and maintains the atmospheric pressure in the bag body 9. FIG. Thereby, the shape of the bag body 9 is maintained as the shape along the shape of the buttock of the seated person. If a readjustment switch (not shown) is turned on, the control device 20 performs S1 (S17). If the readjustment switch has not been switched, the control device 20 ends the shape memory control.

4). Characteristics of the Vehicle Seat According to the Present Embodiment The control device 20 executes shape memory processing for discharging air from the bag body 9 after discharging air from the inflatable bag 7. Thereby, when air is discharged from the inflatable bag 7, the seated person sinks into the cushion pad 5A.

  The cushion pad 5 </ b> A receives a load due to this “sinking of the seated person”. The granular material stored in the bag body 9 moves in the bag body 9 together with the “sink of the seated person” and forms a shape along the body shape of the seated person. Therefore, it becomes possible to obtain the vehicle seat 1 that can hold the shape along the layered shape of the seated person.

The control device 20 executes shape memory processing when the seated person is confirmed to be seated. This makes it possible to reliably obtain a shape along the body shape of the seated person.
Of the cushion pad 5A, for example, portions 10A and 10B that support the sheet width direction end portion side of the bag body 9A are provided with tapered portions 11A and 11B that are inclined with respect to the pressing direction.

  Thereby, when air is discharged from the inflatable bag 7, it is possible to induce the movement of the granular material like an avalanche, and thus it becomes possible to quickly obtain the shape along the body shape of the seated person. . In addition, also in other taper parts 11C-11F, the effect | action and effect similar to said effect | action generate | occur | produce.

(Other embodiments)
In the above-described embodiment, the expansion bag 7 and the bag body 9 are disposed on the seat cushion 5. However, the invention disclosed in this specification is not limited to this. That is, for example, the inflatable bag 7 and the bag body 9 may be disposed also on the seat back 3.

The control device 20 according to the above-described embodiment executes the shape memory process when the seated person is confirmed to be seated. However, the invention disclosed in this specification is not limited to this.
In the above-described embodiment, the taper portions 11A to 11F are provided on the cushion pad 5A. However, the invention disclosed in this specification is not limited to this. That is, for example, a configuration in which at least one of the tapered portions 11A to 11F is abolished may be used.

  In the above-described embodiment, the vehicle seat according to the present invention is applied to a normal passenger car. However, the application of the present invention is not limited to this, and is also applicable to other automobile seats, seats used for vehicles such as railway vehicles, ships and aircraft, or stationary seats such as theater seats. it can.

  Furthermore, the present invention is not limited to the above-described embodiment as long as it matches the gist of the invention described in the claims. Therefore, you may combine at least 2 embodiment among several embodiment mentioned above.

DESCRIPTION OF SYMBOLS 1 ... Vehicle seat 3 ... Seat back 5 ... Seat cushion 5A ... Cushion pad 5B ... Skin 7 ... Expansion bag 9 ... Bag body 11A-11F ... Tapered part 20 ... Control device V1 ... 1st valve P1 ... 1st pump V2 ... Second valve P2 ... Second pump S1 ... Seating sensor

Claims (4)

An inflatable bag provided on the seat pad, the volume of which decreases and expands when fluid flows in and out;
A bag body disposed on the skin side from the expansion bag, in which a large number of granular materials are housed, and a bag body into which fluid can flow in and out,
A control device for controlling fluid inflow and outflow of the inflatable bag and the bag body, the control device capable of executing shape memory processing for discharging the fluid from the bag body after discharging the fluid from the inflatable bag; Sheet to be provided. The control device is capable of executing a determination process for determining whether or not a pressing force larger than a predetermined pressing force determined on the skin has acted on the skin.
Furthermore, the said control apparatus is a sheet | seat of Claim 1 which performs the said shape memory process, when it determines with the pressing force larger than the predetermined pressing force having acted on the said skin by the said determination process. When the direction parallel to the direction from the expansion bag side toward the bag body side is the pressing direction,
The sheet according to claim 1 or 2, wherein a portion of the seat pad that supports an end side of the bag body is provided with a tapered portion that is inclined with respect to the pressing direction. In vehicle seats mounted on vehicles,
An inflatable bag provided on the seat pad, the volume of which decreases and expands when fluid flows in and out;
A bag body disposed on the skin side from the expansion bag, in which a large number of granular materials are housed, and a bag body into which fluid can flow in and out,
A control device for controlling fluid inflow and outflow of the inflatable bag and the bag body, the control device capable of executing shape memory processing for discharging the fluid from the bag body after discharging the fluid from the inflatable bag; Vehicle seat provided.

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