JP2019085109A - Fluid bag apparatus of vehicular seat - Google Patents

Abstract

To provide a fluid bag apparatus of a vehicular seat in which stroke due to expansion of a fluid bag is ensured and expansion in unintended direction is suppressed.SOLUTION: There is provided a fluid bag apparatus 10 of a vehicular seat in which a fluid bag 12 is arranged on a sheet main body onto which a sitting person sits in a direction toward the sitting person and with which desired parts on sitting person's body are pressed by supplying fluid to the fluid bag 12 so that the bag expands. The fluid bag 12 comprises sheet members 14, 16 (flat member), heat welding part 20 (fixation part), a bag part 22, a supply/exhaust pipe 30 and an edge part 24. At least three fluid bags 12 are laminated each other and comprise connecting parts 40 that are connected in a state where edge parts 24 thereof are laminated each other. Due to the connecting parts 40, mutual positional offset of the plurality of fluid bags 12 in expanded state is suppressed.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a fluid bag apparatus for a vehicle seat.

  Conventionally, a fluid bag is provided on a seat body on which a seated person sits down toward the seated person, and a fluid bag device for a vehicle seat that presses a desired portion of the seated person's body by supplying fluid to the fluid bag and expanding it. There is a demand for earning the inflation height of the fluid bag. One possible solution is to increase the volume of the fluid bag. However, the aspect of increasing the volume of the fluid bag has to be improved because it is necessary to increase the capacity of the device for supplying fluid to the fluid bag. In addition, since the fluid bag is internally provided inside the sheet, it becomes difficult to secure the installation space as the size increases. Therefore, a technique as disclosed in Patent Document 1 is known as one technique of the fluid bag device. Patent document 1 which concerns is an air bag apparatus provided with the air bag main body provided with the air supply / discharge port, and air is supplied / discharged through the air supply / discharge port to expand and contract, and the air bag main body is an intermediate portion. A technique is disclosed in which the first bag portion and the second bag portion are folded and divided into a first bag portion and a second bag portion, and the first and second bag portions are stacked on each other and in communication with each other at an intermediate portion.

Japanese Patent Application Publication No. 2004-201942

  However, the air bag main body in Patent Document 1 may be displaced in an unintended direction due to a positional deviation between the first and second bag portions at the time of expansion. In addition, there is a concern that the desired expansion height can not be obtained at the time of unintended expansion.

  The present invention has been made in view of these points, and the problem to be solved by the present invention is to secure the inflated height by the expansion of the fluid bag in the fluid bag device of the vehicle seat, and The purpose is to suppress expansion in an unintended direction.

  In order to solve the above-mentioned subject, the fluid bag device of the vehicle seat of the present invention takes the following measures. First, according to the first aspect of the present invention, a vehicle body is provided with a fluid bag directed to a seated person on a seat body on which the seated person sits down, a fluid is supplied to the fluid bag and inflated to press a desired part of the seated person's body It is a fluid bag device of a seat, wherein the fluid bag comprises a planar member made of a thermoplastic synthetic resin, a fixing portion for stacking the planar member and fixing the periphery, and a portion surrounded by the fixing portion. And an inflow / outflow passage for inflow / outflow of fluid into and out of the bag, and an edge extending on the opposite side to the bag with the fixed portion as a boundary, The fluid bladders have at least three junctions that are configured and stacked on one another and are joined with the edges overlapping each other, wherein the junctions allow the positions of the plurality of fluid bladders in the inflated state relative to one another. Deviation is suppressed.

  According to the first invention, at least three fluid bladders are configured and stacked on one another. Therefore, at the time of inflation of the fluid bag, it is possible to suppress inflation in a direction intersecting with the height direction in which the fluid bag is inflated. For example, even a small volume fluid bag may ensure an inflated height due to inflation. In addition, the fluid bag has a connecting portion connected in a state in which the respective edges overlap each other, and the connecting portion suppresses the mutual positional deviation of the plurality of fluid bags in the inflated state. Therefore, when the fluid bag inflates, expansion in an unintended direction can be suppressed. Thus, in the vehicle seat fluid bag device, it is possible to secure the inflated height due to the fluid bag inflation and to suppress the expansion in an unintended direction.

  Next, according to a second aspect of the present invention, in the fluid bag device for a vehicle seat according to the first aspect, the plurality of fluid bags are integrally configured to be linearly adjacent, and the plurality of fluid bags are At the connection where the adjacent fluid bags are connected, they are bent and folded in a wavelike manner.

  According to the second invention, the plurality of fluid bags are integrally configured to be linearly adjacent to each other. Therefore, the number of parts of the fluid bag device can be suppressed. In addition, the plurality of fluid bags are configured to be folded and corrugated in a wave-like manner at the connection portion where the adjacent fluid bags are connected. Therefore, even if the fluid bag is integrally configured, it can be inflated without interfering with other fluid bags. Also, the fluid bag can be made compact.

  Next, in the fluid bag device for a vehicle seat according to a third aspect of the present invention, in the second aspect, the plurality of fluid bags have a communication passage communicating the fluid to the connection portion.

  According to the third aspect of the present invention, the fluid bag can be made more compact by providing the communication passage for communicating the fluid to the connection portion.

  Next, according to a fourth aspect of the present invention, there is provided a fluid seat device for a vehicle seat according to any one of the first aspect to the third aspect, wherein the connecting portion connects the edge portions of adjacent fluid bags. The connection portion and a second connection portion connecting the edge portions of the fluid bag separated from each other, the second connection portion is the bag portion more than the first connection portion when viewed from the fixed portion. It is located at a distance from

  According to the fourth aspect of the invention, mutual positional deviation can be suppressed for each of the three fluid bags. Further, the second connection portion is provided at a position farther from the bag portion than the first connection portion when viewed from the fixing portion. This can suppress the second connecting portion from blocking the expansion when the fluid bag is expanded.

  According to the present invention, by taking the means of each of the above-mentioned inventions, in the fluid bag device for a vehicle seat, it is possible to secure the inflated height due to the fluid bag inflation and to suppress the inflation in the unintended direction.

It is a perspective view of a vehicular seat concerning an embodiment. It is a system configuration figure of a fluid bag device concerning an embodiment. It is a front view of a fluid bag concerning an embodiment. It is the IV-IV sectional view taken on the line of FIG. It is a sectional view showing the time of contraction of the fluid bag in the fluid bag device concerning an embodiment. It is a sectional view showing the time of expansion of the fluid bag in the fluid bag device concerning an embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a front seat of a vehicle seat in the vehicle seat will be described as an example. In this embodiment, the seat body on which the seated person sits is provided with a fluid bag directed to the seated person, and the vehicle is provided with a fluid and supplied to the fluid bag to inflate, thereby pressing and massaging a desired portion of the seated person's body. It is a sheet fluid bag device. The directions shown by the arrows in the drawings are directions corresponding to the front, the rear, the upper side, the lower side, the left side, and the right side as viewed from a seated person sitting on the vehicle seat.

  As shown in FIG. 1, the seat body 1 of the vehicle seat (vehicle seat) has a seat back 2 serving as a backrest, a seat cushion 3 serving as a seating portion, and a headrest 4 serving as a head lean. A fluid bag device 10 having a massage function is provided on the seat back 2 between a back frame (not shown) and a back pad (not shown).

  The fluid bladder device 10 includes a fluid bladder 12 directed to a seated person as shown in FIG. 1, and supplies and pumps fluid to the fluid bladder 12 to press and massage a desired portion of the seated person's body. It is. Here, the fluid supplied to the fluid bladder 12 exemplifies air. The fluid may be any of various fluids, and may be, for example, a gas other than air or a liquid. The fluid bag 12 is supported on a support plate (not shown), and the support plate is fixed to a back frame (not shown) of the seat back 2. In addition, although the fluid bag apparatus 10 has shown in figure the aspect comprised by two in the seat back 2 in FIG. 1, it is not restricted to this but 2 or more multiple may be comprised. Also, the fluid bag device 10 can be configured as the seat cushion 3 and the headrest 4. When the seat body 1 is provided with an ottoman supporting the legs, the fluid bag device 10 may be configured in the ottoman.

  The detailed configuration of the fluid bag 12 is shown in FIGS. The fluid bag 12 is configured by overlapping two sheet-like members 14 and 16 (planar members) made of a substantially rectangular thermoplastic polyurethane sheet as a pair and face-matching them. Various materials can be applied to the sheet-like members 14 and 16 as long as they are sheet members made of thermoplastic synthetic resin. A thermally welded portion 20 (fixed portion) is formed by heat welding around the two sheet-like members 14 and 16 so as to divide the two sheet-like members 14 and 16 into substantially rectangular shapes. A portion surrounded by the heat welding portion 20 is configured as a bag portion 22. Further, on the outer periphery of the thermal welding portion 20, an edge portion 24 extending to the opposite side to the bag portion 22 with the thermal welding portion 20 as a boundary is formed. Three fluid bags 12 are configured. The three fluid bladders 12 are configured with connections 26 connecting between the adjacent fluid bladders 12. The connection portion 26 allows the three fluid bags 12 to be integrally formed on the two sheet-like members 14 and 16. The three fluid bags 12 are integrally configured to be linearly adjacent. The heat welding portion 20 at the connection portion 26 is not continuously formed, and a part thereof is separated to form a communication passage 28 in which the air is communicated between the fluid bags 12. In addition, a pipe is connected to one of the three fluid bags 12 across the heat welding portion 20, and an air supply / discharge pipe 30 (inflow / outflow path for flowing in and out a fluid) to which air is supplied / discharged is formed. The three fluid bags 12 are folded at the connection 26 and folded in a wavelike manner. Four grooves 32 are formed on the sheet-like member 14 side of the mating surfaces of the two sheet-like members 14 and 16 in the portion where the communication passage 28 is formed (see FIG. 4). By the presence of the groove 32, air can be communicated smoothly even in the state where the connection portion 26 is bent. In addition, each fluid bag 12 has a connecting portion 40 which is connected in a state in which the edges 24 are overlapped with each other. The connecting portion 40 has a first connecting portion 41 connecting the edges 24 of the adjacent fluid bags 12 and a second connecting portion 42 connecting the edges 24 of the separated fluid bags 12. The second connection portion 42 is provided at a position farther from the bag portion 22 than the first connection portion 41 when viewed from the heat welded portion 20. Specifically, the distance 42L between the second connection portion 42 and the heat welding portion 20 is larger than the distance 41L between the first connection portion 41 and the heat welding portion 20. Here, in the present embodiment, the connection portions 40 are connected by heat welding in a state in which the respective edge portions 24 are overlapped.

  In the present embodiment, the aspect in which three fluid bags 12 are configured has been described, but at least three fluid bags 12 may be configured and three or more may be configured. The plurality of fluid bags may be separately configured separately as well as the integral configuration. In the above embodiment, the three fluid bags 12 are connected by the connecting portion 26, and air is communicated between the fluid bags 12 by providing the communication passage 28 in the connecting portion 26. Therefore, this embodiment is an embodiment in which the fluid bag 12 is provided in any one of the air supply and discharge pipe 30. Here, in the aspect in which the three fluid bags 12 are divided without being respectively connected, the air supply and discharge pipes 30 are provided to the respective fluid bags 12 respectively. Further, even in a mode in which the communication passage 28 is not formed in the connection portion 26 connecting the three fluid bags 12, the air supply and discharge pipes 30 are provided to the respective fluid bags 12. Moreover, the aspect of the connection part 40 is variously applicable. For example, it may be connected by an adhesive, may be connected by a fastening connection of a bolt and a nut, may be connected by engagement by a clip or the like, or may be connected by ultrasonic welding of synthetic resin pins. May be In the present embodiment, the second connection portion 42 is provided at a position farther from the bag portion 22 than the first connection portion 41 when viewed from the heat welding portion 20. Here, the position of the second connection portion 42 may be set to various positions as long as the position does not affect the expansion height of the fluid bags 12 connected by the second connection portion 42. Although the edge part 24 showed the aspect provided in the perimeter of the outer periphery of the bag part 22, it may be formed only in the vicinity which the connection part 40 is comprised. The groove 32 may be provided on the surface of at least one side of the two sheet-like members 14 and 16 or may be provided on both sides. The number of grooves 32 is not limited to four, and may be three or less or five or more.

  In the present embodiment, a mode is shown in which two sheet members 14 and 16 (surface members) are paired, and these are superimposed on each other. However, the bag portion may be configured by folding one sheet-like member to form a pair as a pair of sheet members. Further, in the present embodiment, a mode is shown in which the heat welded portion 20 (fixed portion) for fixing the periphery by heat welding is formed so as to divide the sheet-like members 14 and 16 into substantially rectangular shapes in a superimposed state. . However, the fixing portion is not limited to heat welding but may be a fixing method such as an adhesive.

  As shown in FIG. 2, the air supply and discharge pipe 30 of the fluid bag 12 is connected to the pump P via the switching valve 50. The switching valve 50 is a solenoid valve, and is alternately switched between an air supplying state in which the air supply and exhaust pipe 30 is in communication with the pump P and an air discharging state in communication with the air release port. The switching valve 50 is in an exhaust state when energized and is in an air-charged state when not energized. The pump P generates compressed air by being energized, and supplies the compressed air to the fluid bladder 12 through the switching valve 50. A check valve 52 is interposed between the switching valve 50 and the pump P. The check valve 52 allows the flow of air from the pump P to the switching valve 50 and prevents the flow of air in the opposite direction.

  2 and 5 show the fluid bag 12 in a contracted state. When the switching valve 50 is deenergized and the pump P is energized to generate compressed air, the compressed air from the pump P is supplied to the fluid bladder 12 through the air supply / discharge pipe 30. As a result, as shown in FIG. 2 and FIG. 6, the fluid bag 12 is inflated and presses and massages a desired part of the seated person's body. At this time, the positional relationship between the three fluid bags 12 in the inflated state is suppressed by the connection portion 40. That is, mutual positional deviation is suppressed in the direction intersecting the direction in which the fluid bladders 12 are overlapped. In this state, when the pump P is deenergized and the switching valve 50 is deenergized, the air supplied to the fluid bladder 12 is held by the check valve 52 to the desired part of the seat occupant's body Maintain the pressure of

  Thereafter, when the switching valve 50 is energized, the air supplied to the fluid bladder 12 is exhausted through the air supply and exhaust pipe 30 and the switching valve 50. As a result, the fluid bag 12 contracts as shown in FIG.

  Thus, according to the vehicle seat fluid bladder device 10 of the embodiment, at least three fluid bladders 12 are configured and stacked on one another. Therefore, when the fluid bag 12 is inflated, it is possible to suppress the inflation in the direction intersecting the expanding height (stroke) direction. For example, even a small volume fluid bladder 12 may ensure an inflated height due to inflation. In addition, the fluid bag 12 has a connecting portion 40 connected in a state in which the edges 24 overlap each other, and the connecting portion 40 suppresses mutual positional deviation of the plurality of fluid bags 12 in the inflated state. It is. Therefore, when the fluid bag 12 expands, expansion in an unintended direction can be suppressed. Therefore, in the fluid bag device 10 for a vehicle seat, the expansion height of the fluid bag 12 due to the expansion can be secured, and the expansion in an unintended direction can be suppressed.

  Also, the plurality of fluid bags 12 are integrally configured to be linearly adjacent. Therefore, the number of parts of the fluid bag device 10 can be suppressed. In addition, the plurality of fluid bladders 12 are configured to be bent and folded in a wavelike manner at the connection portion 26 where the adjacent fluid bladders 12 are connected. Therefore, even if the fluid bag 12 is configured integrally, it can be inflated without interfering with the other fluid bags 12. Also, the fluid bag 12 can be configured to be compact.

  Further, the fluid bag 12 can be configured more compactly by providing the communication passage 28 for communicating the fluid to the connection portion 26.

  Moreover, mutual positional deviation can be suppressed for each of the three fluid bags 12. Further, the second connection portion 42 is provided at a position farther from the bag portion 22 than the first connection portion 41 when viewed from the heat welded portion 20. Thereby, it can suppress that the 2nd connection part 42 intercepts expansion at the time of expansion of fluid bag 12.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, It can implement in another various form. For example, although the vehicle seat was illustrated and illustrated as an example of a vehicle seat, a vehicle is not limited to a vehicle, It can apply to various vehicles, such as a ship and an aircraft.

Reference Signs List 1 seat body 2 seat back 3 seat cushion 4 headrest 10 fluid bag device 12 fluid bag 14, 16 sheet-like member (planar member)
20 Heat-welded part (fixed part)
22 sack portion 24 edge portion 26 connection portion 28 communication passage 30 air supply and exhaust pipe (inflow / outflow passage)
32 groove 40 connecting portion 41 first connecting portion 42 second connecting portion 50 switching valve 52 check valve P pump

Claims (4)

A fluid bag device for a vehicle seat, comprising: providing a fluid bag toward a seated person on a seat body on which the seated person sits down, supplying a fluid to the fluid bag and expanding the fluid bag to press a desired part of the seated person's body ,
The fluid bag is
Sheet member made of thermoplastic synthetic resin,
A fixing portion for stacking the planar members and fixing the periphery;
A bag portion that allows fluid to flow into and out of a portion surrounded by the fixed portion;
An inflow / outflow path for inflow and outflow of fluid in the bag portion
An edge extending to the side opposite to the bag portion with the fixed portion as a boundary;
Equipped with
The fluid bag is configured of at least three and stacked one on another, and has a connecting portion in which the edges of one another are connected in an overlapping manner,
A fluid bag device for a vehicle seat in which mutual positional deviation of a plurality of fluid bags in an inflated state is suppressed by the connecting portion. A vehicle seat fluid bag apparatus according to claim 1, wherein
The plurality of fluid bags are integrally configured to be linearly adjacent.
A fluid bag apparatus for a vehicle seat, wherein the plurality of fluid bags are folded at a connection where adjacent fluid bags are connected and folded in an undulating manner. A fluid bag apparatus for a vehicle seat according to claim 2, wherein
A fluid bag device for a vehicle seat, wherein the plurality of fluid bags are configured to communicate with each other at the connection portion. A fluid bag apparatus for a vehicle seat according to any one of claims 1 to 3, wherein
The connection portion is a first connection portion connecting the edges of adjacent fluid bags;
And a second connecting portion connecting the edges of the fluid bags separated from each other.
The fluid bag device for a vehicle seat, wherein the second connection portion is provided at a position farther from the bag portion than the first connection portion when viewed from the fixing portion.

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