JP6260244B2 - Sheet device - Google Patents

Description

  The present invention relates to a sheet apparatus.

  2. Description of the Related Art Conventionally, there is a seat device including an airbag provided below a seat seat surface and an internal pressure control device that controls the internal pressure of the airbag. For example, the seat device described in Patent Literature 1 includes a pair of airbags disposed at positions corresponding to the left and right starboard portions of an occupant seated on the seat seating surface. The internal pressure control device is configured to expand and contract these airbags alternately.

  That is, according to the said structure, the passenger | crew's buttocks supported above each airbag can be put on the simulated exercise environment equivalent to a walking state. Thus, it is possible to reduce the fatigue of the occupant by stimulating the muscles of the lower limbs and promoting blood flow.

Japanese Patent No. 2620445

  However, the buttocks targeted by the above prior art are only the base end portion of the lower limbs. For this reason, the fact that the fatigue reduction effect obtained by simulating the walking movement must be limited by itself, and in this respect, there is still room for improvement. It was.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a seat device that can more effectively reduce occupant fatigue.

  A seat device that solves the above-described problems includes a plurality of airbags extending in the front-rear direction of the seat seat surface below the seat seat surface, and each airbag is divided into a plurality of control blocks, and the airbag is divided into the control blocks. An internal pressure control device capable of controlling the internal pressure of the bag, wherein each control block is a different control block below each thigh for each thigh of an occupant seated on the seat seat surface. The internal pressure control device is configured so that the airbag belonging to the control block belongs to another control block with respect to at least one control block. Control to be in a state of expansion / contraction opposite to the bag, and transition a control block to which the reverse expansion / contraction control is applied over time. Preferred.

  That is, even if the supporting pressure under the thigh is changed as a whole, the compression of the vein cannot be effectively relieved. However, according to the above configuration, while supporting each thigh of the occupant seated on the seat seat surface by each airbag controlled in the expanded state, above each airbag controlled in the contracted state, Based on the pressure reduction control, the support pressure of the seat seat surface can be partially reduced. In addition, the vein pressure can be efficiently relieved at the supporting pressure lowering portion. In particular, since each airbag extends in the front-rear direction of the seat seat surface so as to follow the extending direction of the vein, the compression of the vein can be more effectively relieved. Furthermore, the pumping action can be generated by repeating the compression and relaxation of the vein. And thereby, the fatigue can be reduced by promoting blood flow in the lower limbs including the thigh. In addition, the feeling of fatigue can be reduced by the massage effect.

According to the configuration in which each of the airbags is arranged so that the peripheral portion overlaps with the adjacent airbag, when the airbag is affected by the expansion and contraction of the airbag, the support pressure distribution on the seat seat surface is affected. Resolution can be increased.
In the seat device that solves the above problem, it is preferable that the airbags are arranged radially so as to expand from the rear side to the front side of the seat seat surface.
That is, in many cases, both thighs of the occupant seated on the seat seating surface are arranged in a substantially C shape so that the knee side located in front of the thigh is opened. Therefore, according to the above configuration, blood flow can be more effectively promoted.

  In the seat device that solves the above problem, the internal pressure control device preferably controls the control blocks adjacent to each other in the seat width direction so that the airbags belonging to the control blocks are alternately expanded and contracted.

In the seat device that solves the above problem, the internal pressure control device preferably causes the control block to which the opposite expansion / contraction control is applied to transition to a control block adjacent in the seat width direction.
According to each said structure, a blood flow can be promoted effectively. In addition, a high massage effect can be obtained.

  In the seat device that solves the above-described problem, the internal pressure control device is configured to perform all of the airbags arranged below the thighs before the control block to which the opposite expansion / contraction control is applied is changed. It is preferable to control so that the expansion / contraction states of the two are equal.

  According to the said structure, each passenger | crew's thigh seated on the seat seat surface can be supported more stably. And thereby, the seating feeling can be improved by ensuring good holding performance.

  According to the present invention, it is possible to more effectively reduce occupant fatigue.

The perspective view of the vehicle seat to which the seat apparatus was applied. The schematic block diagram of a sheet | seat apparatus. (A)-(c) is an effect | action explanatory drawing of a sheet apparatus. (A) (b) is explanatory drawing which shows another example regarding the setting of a control block. (A)-(d) is explanatory drawing which shows the control form of another example regarding the transition of the control block to which reverse expansion / contraction control is applied. Explanatory drawing which shows another example of basic control mode. (A) (b) is explanatory drawing which shows another example regarding the shape of an airbag, and the setting of a control block, (c) is explanatory drawing which shows another example regarding the arrangement | sequence of an airbag. Explanatory drawing which shows another example regarding the arrangement | sequence of an airbag.

Hereinafter, an embodiment of a seat device will be described with reference to the drawings.
As shown in FIG. 1, the vehicle seat 1 includes a seat cushion 2 and a seat back 3 provided so as to be tiltable with respect to a rear end portion of the seat cushion 2. A headrest 4 is provided at the upper end of the seat back 3.

  In addition, as shown in FIGS. 1, 2, and 3 (a) to 3 (c), in the seat 1 of the present embodiment, a seat skin 5 and a seat that constitute the seat seat surface S, below the seat seat surface S. An airbag 10 is provided between the cushion body 6. In the present embodiment, by controlling the internal pressure of the airbag 10 and changing the expansion / contraction state, the support pressure by which the seat seat surface S lifts the occupant seated on the seat seat surface S can be adjusted. A sheet device 11 is formed.

  Specifically, as shown in FIG. 2, the seat device 11 of the present embodiment includes a pump 12 that pumps air to the airbag 10. A plurality of valve devices 13 are provided in the middle of the air supply path L that connects the airbag 10 and the pump 12. Further, a pressure sensor 14 is provided in the air supply path L in the vicinity of the pump 12. In the present embodiment, an internal pressure control device 20 capable of controlling the internal pressure of the airbag 10 is formed by controlling the operation of the pump 12 and each valve device 13 by an ECU (electronic control device) 15. .

  More specifically, below the seat seat surface S, a plurality of airbags 10 (10a to 10h) having a substantially long bag shape and extending in the front-rear direction (left-right direction in FIG. 2) are provided. Specifically, eight airbags 10 (10a to 10h) are arranged in the sheet width direction, with four each in each direction across a center line N that bisects in the sheet width direction (vertical direction in FIG. 2). Is provided.

  In the present embodiment, the air (air) pumped by the pump 12 is supplied to each airbag 10 via the two air supply paths L1 and L2. The air supply passages L1 and L2 can release the air in the airbag 10 communicating with the stop valve 13a that shuts off the air supply by the pump 12 and the air supply passages L1 and L2, respectively. Open valve 13b.

  That is, the ECU 15 of the present embodiment fills the airbag 10 communicating with the air supply paths L1 and L2 with air by opening the stop valve 13a and closing the release valve 13b. Further, by opening the open valve 13b and closing the stop valve 13a, the air in the airbag 10 communicating with the air supply paths L1 and L2 is released. The ECU 15 of the present embodiment stops the supply of air by the pump 12 when the pressure value in the air supply path L detected by the pressure sensor 14 reaches a predetermined value. And the internal pressure control apparatus 20 of this embodiment can expand and contract each airbag 10 by controlling the internal pressure by this.

  In the present embodiment, each of the airbags 10 (10a to 10h) is divided into two control blocks CB1 and CB2 based on the structure of the air supply path L (L1, L2) divided into the two systems. ing. Specifically, in the present embodiment, airbags 10a, 10c, 10e, 10g communicating with the first air supply path L1 belonging to the first control block CB1 are provided below the seat seat surface S, and the second Air bags 10b, 10d, 10f, and 10h communicating with the second air supply path L2 belonging to the control block CB2 are alternately arranged. And the internal pressure control apparatus 20 of this embodiment can control the internal pressure of the airbag 10 belonging to the control blocks CB1 and CB2 for each of these two control blocks CB1 and CB2.

  More specifically, as shown in FIGS. 3B and 3C, the internal pressure control device 20 of the present embodiment includes first and second control blocks that are adjacent to each other in the sheet width direction (the left-right direction in FIG. 3). The CB1 and CB2 are controlled so that the airbags 10 belonging to the control blocks CB1 and CB2 are alternately expanded and contracted.

  Specifically, the internal pressure control device 20 of the present embodiment has a basic control mode in which all the airbags 10 are held in an expanded state (see FIG. 3A). The internal pressure control device 20 controls the airbags 10a, 10c, 10e, and 10g belonging to the first control block CB1 to be in an expanded state, and the airbags 10b and 10d belonging to the second control block CB2. , 10f, 10h has a first internal pressure increase / decrease mode for controlling the contracted state (see FIG. 3B). Then, the internal pressure control device 20 controls the airbags 10b, 10d, 10f, and 10h belonging to the second control block CB2 to be in the expanded state, and the airbags 10a and 10c belonging to the first control block CB1. , 10e, 10g has a second internal pressure increase / decrease mode for controlling the contracted state (see FIG. 3C).

  That is, as shown in FIG. 3A, in the human thigh 30, most of the main veins 31 are located behind the thigh 30 (below the femur 32 in FIG. 3). ing. That is, when the occupant sits on the seat seat surface S, the veins 31 are pressed by the occupant's weight and the support pressure of the seat seat surface S that lifts the thigh 30 from below. And the fatigue is promoted because the blood flow of the leg part is inhibited thereby.

  In view of this point, the internal pressure control device 20 according to the present embodiment repeatedly executes the first and second internal pressure increase / decrease modes (see FIGS. 3B and 3C) with the passage of time, thereby enabling the seat. The airbags 10 adjacent in the width direction are alternately enlarged or reduced. The internal pressure control device 20 according to the present embodiment performs control modes to be executed from the basic control mode to the internal pressure increase / decrease modes after a predetermined time has elapsed since the seating of the occupant on the seat seat surface S is detected. Switch. Further, when the first and second internal pressure increase / decrease modes are switched, the internal pressure control device 20 executes the switching of the internal pressure increase / decrease mode with the execution of the basic control mode interposed therebetween. And the seat apparatus 11 of this embodiment uses the change of the support pressure distribution which arises by this, stimulates the passenger | crew's thigh 30 seated on the seat seat surface S, promotes the blood flow, and is fatigued. The structure is designed to reduce the feeling.

Next, the operation of the seat device 11 in the present embodiment configured as described above will be described.
As shown in FIGS. 2 and 3 (a) to 3 (c), in the present embodiment, each region α1, α2 of the seat seat surface S that is divided into two in the seat width direction across the center line N, respectively. Two airbags 10 belonging to the first and second control blocks CB1, CB2 are alternately arranged side by side. As a result, each thigh 30 of the occupant seated on the seat seating surface S belongs to one of the first and second control blocks CB1 and CB2 below each thigh 30. A plurality of (two each) airbags 10 are arranged.

  Moreover, if the state in which all the airbags 10 are expanded is used as a reference, the state in which the airbags 10 belonging to the first and second control blocks CB1 and CB2 are alternately expanded and contracted is the same as the other airbags 10 In other words, the “deflated airbag 10” controlled to the opposite expansion / contraction state transitions with the passage of time.

  That is, in the internal pressure control device 20 of the present embodiment, the airbag 10 belonging to one of the first control block CB1 and the second control block CB2 is in an expanded / contracted state (a contracted state) opposite to the airbag 10 belonging to the other. ) (Pressure reduction control). As a result, the control block controlled to the contracted state transitions with the passage of time, so that the portions with weak support pressure that lift the respective thighs 30 from below move sequentially.

  That is, as shown in FIGS. 3B and 3C, the support pressure of the seat seat surface S is partially reduced based on the pressure reduction control above each airbag 10 in a contracted state. The compression of the vein 31 located at the supporting pressure reduction site is relieved. In particular, each airbag 10 of the present embodiment has a substantially long bag shape extending in the front-rear direction so as to extend in the extending direction of the vein 31 in the thigh 30 thereof. 31 pressure is relieved. As a result, blood flow in the lower limb including the thigh 30 is promoted.

  Furthermore, as each airbag 10 repeats expansion and contraction, the support pressure of the seat seat surface S is increased or decreased above each airbag 10, so that the compression and relaxation of the vein 31 are repeated. And the blood flow is accelerated | stimulated by the pump action which arises by this. In addition, a high massage effect can be obtained by stimulating the muscles.

As described above, according to the present embodiment, the following effects can be obtained.
(1) That is, even if the support pressure below the thigh 30 is changed as a whole, the compression of the vein 31 cannot be effectively relieved. However, according to the above configuration, the airbag 10 controlled to be in the expanded state supports the thighs 30 of the occupant seated on the seat seat surface S, while the airbag 10 is controlled to be in the contracted state. In, based on the pressure reduction control, the support pressure of the seat seat surface S can be partially reduced. And in this support pressure fall site | part, the compression of the vein 31 can be relieved efficiently. In addition, the pumping action can be generated by repeating the compression and relaxation. And thereby, the fatigue can be reduced by promoting blood flow in the lower limb including the thigh 30. In addition, the feeling of fatigue can be reduced by the massage effect.

  (2) When switching between the first and second internal pressure increase / decrease modes, by switching the internal pressure increase / decrease mode across the execution of the basic control mode for holding each airbag 10 in the expanded state, Each thigh 30 of the occupant seated on the seat seat surface S can be supported more stably. And thereby, the seating feeling can be improved by ensuring good holding performance.

In addition, you may change the said embodiment as follows.
In the above embodiment, the internal pressure control device 20 supplies the air bags 10 with the air (air) pumped by the pump 12 via the two air supply paths L1 and L2. However, the configuration of the internal pressure control device 20 such as the number and arrangement of the air supply passages L and the valve devices 13 may be arbitrarily changed.

  In the above embodiment, in the seat width direction, the airbag 10 (10a, 10c, 10e, 10g) belonging to the first control block CB1 and the second air supply path L2 belonging to the second control block CB2 The airbags 10 (10b, 10d, 10f, 10h) communicated with each other were arranged alternately. However, the present invention is not limited to this. For each thigh 30 on the seat seat surface S, a plurality of airbags 10 belonging to different control blocks are arranged in the seat width direction below each thigh 30. If so, the setting of the control block may be arbitrarily changed.

  For example, in the example shown in FIGS. 4 (a) and 4 (b), below each region α1, α2 of the seat seat surface S that is divided in the seat width direction across the center line N, as in the above embodiment. Each of the four airbags 10 is arranged in total of four. In this example, different control blocks are set for the two airbags 10 located at both ends of the regions α1 and α2 and the two airbags 10 located at the center.

  Specifically, a first control block CB1 is set in each of the airbags 10a and 10d located at both ends of the first region α1. Similarly, a second control block CB2 is set in each of the airbags 10b and 10c located at the center of the first region α1. Furthermore, a third control block CB3 is set in each of the airbags 10f and 10g located in the center of the second region α2. And 4th control block CB4 is set to each airbag 10e and 10h located in the both ends of 2nd area | region (alpha) 2.

  In this example, the airbags 10f and 10g belonging to the third control block CB3 expand and contract in synchronization with the airbags 10a and 10d belonging to the first control block CB1, and the fourth control block CB4. The airbags 10e and 10h belonging to 1 expand and contract in synchronization with the airbags 10b and 10c belonging to the second control block CB2. As a result, the control blocks adjacent to each other in the seat width direction can be controlled so that the airbags 10 belonging to the control blocks are alternately expanded and contracted. Even if comprised in this way, the effect similar to the said 1st Embodiment can be acquired.

  -In the said embodiment, when the state which all the airbags 10 expanded was made into the reference | standard, each airbag 10 which belonged to 1st and 2nd control blocks CB1 and CB2 expanded / contracted alternately, and other airbags It was decided that the contracted airbag 10 controlled to the expansion / contraction state opposite to that of the bag 10 transitioned with the passage of time. However, the present invention is not limited to this, and at least one control block is controlled so that an airbag belonging to the control block is in an expansion / contraction state opposite to an airbag belonging to another control block, and the opposite expansion / contraction control is applied. If the control block to be changed transitions with time, the transition form may be arbitrarily changed.

  For example, in the example shown in FIGS. 5A to 5D, each of the four airbags 10 (10a to 10h) disposed below the respective regions α1 and α2 is shown in the left side of FIG. First to fourth control blocks CB1 to CB4 are set in order. In this example, the control block X to which the expansion / contraction control opposite to the other control blocks is applied, that is, the control block for bringing the airbag 10 to which the control block X belongs is sequentially moved from the left side to the right side in FIG. The control block is configured to transit to a control block adjacent in the sheet width direction.

  Even if comprised in this way, the effect similar to the said 1st Embodiment can be acquired. Note that the transition timing of the control block X to which the opposite expansion / contraction control in the regions α1 and α2 is applied does not necessarily have to be synchronized. Further, the transition direction of the control block X to which the opposite enlargement / reduction control is applied may not be one direction. Furthermore, it does not necessarily have to transition to adjacent control blocks. And the structure which the control block X to which the opposite expansion / contraction control is applied changes at random is not excluded. Even with such a configuration, blood flow can be effectively promoted. And a high massage effect can also be acquired.

  Further, as shown in FIG. 6, the state in which all the airbags 10 are contracted is used as a reference. Then, the control block in which the airbag 10 to which the airbag 10 belongs is controlled as the “control block X to which the opposite expansion / contraction control is applied” is changed, and the control block X to which the opposite expansion / contraction control is applied is changed over time. It is good also as composition to do.

  That is, by forming a support pressure increasing portion on a part of the seat seat surface S, compression is applied to the vein 31 located above the support pressure increasing portion. After that, the control block controlled to the expanded state transitions, and the compression of the vein 31 is alleviated. And the blood flow of the leg part containing the thigh 30 can be promoted by producing a pump action by this. In addition, a high massage effect can be obtained.

  The number and the length of the airbags 10 arranged on the seat seat surface S may be arbitrarily changed. For example, as shown to Fig.7 (a), the airbag 10B whose shape is longer than the said embodiment is used. Then, a configuration may be adopted in which a plurality (two in this example) adjacent in the sheet width direction belong to the same control block CB.

  Moreover, as shown in FIG.7 (b), the airbag 10C whose length is shorter than the said embodiment is used. A plurality of (in this example, two) airbags 10C arranged in series in the front-rear direction of the seat seat surface S may belong to the same control block CB.

  Further, the arrangement shape of the airbags 10 may be arbitrarily changed. For example, as shown in FIG. 7C, the airbags 10 may be arranged radially so as to expand from the rear side to the front side (in the figure, from the right side to the left side) of the seat seat surface S. Good.

  That is, in many cases, the thighs 30 of the occupant seated on the seat seat surface S are arranged in a substantially C shape so that the knee side located in front of the thigh 30 is opened. Therefore, with such a configuration, blood flow can be more effectively promoted, and the feeling of fatigue can be reduced.

  -Moreover, as shown in FIG. 8, it is good also as a structure which arrange | positions each airbag 10 so that the peripheral part may overlap with the airbag 10 which adjoins. With such a configuration, it is possible to increase the resolution when the support pressure distribution on the seat seat surface S is affected by the expansion and contraction of each airbag 10 with a simple configuration.

  As for the “form in which the peripheral edge overlaps with the adjacent airbag”, as in the example shown in FIG. 8, in addition to the configuration in which the adjacent airbags 10 are alternately turned up and down, for example, one side in the seat width direction The side peripheral part may be arranged below the peripheral part of the adjacent airbag, and the peripheral part on the other side in the seat width direction may be arranged above the peripheral part of the adjacent airbag.

  In the above embodiment, when switching between the first and second internal pressure increase / decrease modes, the internal pressure increase / decrease mode is switched across the execution of the basic control mode in which all airbags 10 are held in the expanded state. did. However, the present invention is not limited to this, and before the control block to which the opposite enlargement / reduction control is applied is changed, at least each of the airbags 10 arranged below the thighs 30 is made to have the same expansion / contraction state. Any configuration may be used. And when changing the control block to which the opposite expansion / contraction control is applied, it is good also as a structure which does not pinch | interpose such control that the expansion / contraction state of each airbag 10 becomes equal.

  DESCRIPTION OF SYMBOLS 1 ... Seat, 2 ... Seat cushion, 5 ... Seat skin, 10 (10a-10h), 10B, 10C ... Air bag, 11 ... Seat apparatus, 12 ... Pump (internal pressure control apparatus), 13 ... Valve apparatus (internal pressure control apparatus) ), 13a ... Stop valve, 13b ... Open valve, 14 ... Pressure sensor (internal pressure control device), 15 ... ECU (internal pressure control device), 20 ... Internal pressure control device, 30 ... Thigh, 31 ... Vein, 32 ... Thigh Bone, S ... Seat seat surface, N ... Center line, α1, α2 ... Region, L (L1, L2) ... Air supply path (internal pressure control device), CB, CB1-CB4 ... Control block, X ... Reverse expansion / contraction control Control block to which is applied.

Claims (5)

A plurality of airbags extending in the front-rear direction of the seat seat surface below the seat seat surface;
An internal pressure control device capable of dividing the airbag into a plurality of control blocks and controlling the internal pressure of the airbag for each control block;
The control blocks are arranged so that a plurality of airbags belonging to different control blocks are arranged in the seat width direction below the thighs of the occupants seated on the seat seat surface. Is set,
The internal pressure control device controls at least one control block so that an airbag belonging to the control block is in an expansion / contraction state opposite to an airbag belonging to another control block, and the opposite expansion / contraction control is applied. Control block to transition over time ,
Wherein each air bag, seat device that will be arranged to overlap the airbag periphery adjacent. The seat device according to claim 1,
Each said airbag is arranged radially so that it may expand toward the front side from the back side of the said seat seat surface, The seat apparatus characterized by the above-mentioned. In the sheet apparatus according to claim 1 or 2 ,
The internal pressure control device controls the control blocks adjacent to each other in the seat width direction so that the airbags belonging to the control blocks are alternately expanded and contracted;
A sheet apparatus characterized by the above. In the sheet apparatus according to any one of claims 1 to 3 ,
The internal pressure control device shifts a control block to which the opposite enlargement / reduction control is applied to a control block adjacent in the sheet width direction. In the sheet apparatus according to any one of claims 1 to 4 ,
The internal pressure control device performs control so that all the expansion / contraction states of the airbags arranged below the thighs are equal before the control block to which the opposite expansion / contraction control is applied is shifted. A sheet apparatus characterized by: