CN116710320A - Seat for vehicle - Google Patents

Abstract

The present invention provides a vehicle seat which can appropriately deform the shape of the vehicle seat so that a seated user can take a comfortable posture. A vehicle seat includes: a seat back frame (20); a skin material covering the seat back frame (20); the movable body (35, 37), dispose between back frame (20) of the seat and surface skin material, and protrude forward relative to back frame of the seat; and a control device for controlling the operation of the movable bodies (35, 37). The movable bodies (35, 37) have: a left and right shoulder movable body (35) disposed at an upper portion of the seat back frame (20); and a lumbar movable body (37) disposed below the shoulder movable body (35) in the seat back frame (20), wherein the control device controls the protruding amount of either the shoulder movable body (35) or the lumbar movable body (37) based on the protruding amount of the other.

Description

Seat for vehicle

Technical Field

The present invention relates to a vehicle seat, and more particularly, to a vehicle seat including a movable body.

Background

Conventionally, a vehicle seat has been proposed which can deform the shape of the seat in accordance with the shape of a seated user. To be described in detail, a bag is incorporated in a vehicle seat. Further, the bag body is inflated or deflated by controlling the amount of air supplied to the bag body. Thus, a part of the vehicle seat can be deformed in accordance with the shape of the occupant.

Patent document 1 discloses a vehicle seat having a pocket in a side support portion of a seat cushion. The vehicle seat is capable of deforming the shape of the cushion side support in cooperation with the buttocks and thigh of the seated user.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication No. 2014-148235

Disclosure of Invention

Problems to be solved by the invention

According to the vehicle seat disclosed in patent document 1, the support of the occupant can be ensured, but further improvement is desired. That is, it is desirable to improve the support of the seated user and to reduce fatigue of the seated user to improve comfort. For example, a vehicle seat is sought that can be deformed appropriately in shape so that a seated user can take a comfortable posture.

The present invention has been made in view of the above-described problems, and an object thereof is to provide a vehicle seat in which the shape of the vehicle seat can be appropriately deformed and a seated user can take a comfortable posture.

Technical means for solving the problems

The problem is solved by a vehicle seat according to the invention comprising: a seat back frame; a skin material covering the seat back frame; a movable body disposed between the seat back frame and the skin material and protruding forward with respect to the seat back frame; and a control device that controls the operation of the movable body, wherein the movable body has: a left and right first movable body disposed at an upper portion of the seat back frame; and a second movable body disposed below the first movable body in the seat back frame, wherein the control device controls the amount of protrusion of either one of the first movable body and the second movable body based on the amount of protrusion of the other.

According to the above configuration, the protruding amount of the second movable body is controlled based on the protruding amount of the first movable body disposed above the seat back frame. Thus, for example, the first movable body protrudes, so that the forward bending portion of the seated user in the humpback posture can be supported, and the second movable body can be contracted according to the protruding amount of the first movable body. As a result, the burden on the rearward projecting portion of the seated user in the humpback posture is reduced.

The protruding amount of the first movable body is controlled based on the amount of fluctuation of the second movable body disposed below the back frame. Thus, for example, the second movable body protrudes, so that the second movable body can support the forward curved portion of the seated user in the reverse bow-waist posture, and the first movable body can be contracted according to the protruding amount of the second movable body, so that the burden on the seated user in the reverse bow-waist posture can be reduced. In this way, the seated user can be properly supported according to the posture of the seated user. By appropriately deforming the shape of the vehicle seat in this way, a comfortable posture can be adopted for the seated user.

Preferably, the first movable body is a shoulder movable body that supports a shoulder of the occupant, the second movable body is a waist movable body that supports a waist of the occupant, and the control device controls the protruding amount of either one of the shoulder movable body and the waist movable body so as to be smaller when the protruding amount of the other is larger when the protruding amount of the other is controlled.

According to the above configuration, when the protruding amount of either one of the shoulder movable body and the waist movable body is large, the protruding amount of the other is controlled so as to be small. For example, the first movable body protrudes, so that both shoulders of the seated user in the humpback posture can be supported, and the second movable body can be contracted according to the protruding amount of the first movable body. As a result, the burden on the waist of the seated user in the humpback posture is reduced.

The protruding amount of the first movable body is controlled based on the amount of fluctuation of the second movable body disposed below the back frame. Thus, for example, the second movable body protrudes, and the second movable body can support the waist of the seated user in the reverse bow-waist posture, and the first movable body can be contracted according to the protruding amount of the second movable body, so that the burden on the seated user in the reverse bow-waist posture can be reduced. By appropriately deforming the shape of the vehicle seat in this way, a comfortable posture can be adopted for the seated user.

Further, it is preferable that the movable body has an inflatable/contractible bag, and the control device acquires a pressure signal related to a pressure applied to the bag, and controls the protrusion amount of the bag based on the pressure signal.

According to the above configuration, the phenomenon of excessive inflation of the bag body can be suppressed based on the pressure signal output from the pressure sensor. Therefore, the seated user can be properly supported according to the posture and the body shape of the seated user, and a comfortable posture can be taken for the seated user.

Preferably, the control device acquires a steering angle signal related to a steering angle of the vehicle, and controls the protruding amount of the movable body in real time based on the steering angle signal.

According to the above configuration, the protruding amount of the movable body can be controlled in real time appropriately according to the running state of the vehicle. Thus, a comfortable posture can be adopted for the seated user corresponding to various running states.

Preferably, the first movable body includes: an inner first movable body disposed on both sides of the seat back frame in the seat width direction; and left and right outer first movable bodies disposed at outer positions in the seat width direction of the inner first movable bodies.

According to the above configuration, the outer first movable body is disposed outside the inner first movable body. Therefore, the user can be appropriately supported in accordance with the body shape of the user, and the user can be appropriately supported against the load received in the lateral direction during traveling.

Further, the seat back frame preferably includes: left and right lower side frames extending in the up-down direction; left and right upper frames mounted on upper ends of the left and right lower frames, respectively, and rotatable in a front-rear direction with respect to the lower frames; and an upper frame connected to the upper frame, wherein the first movable body is disposed at a position sandwiched by the left and right upper frames in the seat width direction.

According to the above configuration, the shape of the vehicle seat can be appropriately deformed according to the posture of the occupant by rotating the left and right upper frames rotatable in the front-rear direction with respect to the lower frames. Thus, a comfortable posture can be taken for the seated user.

Further, the vehicle seat preferably includes a seat cushion frame, the seat back frame is attached to a rear end portion of the seat cushion frame so as to be rotatable in a front-rear direction with respect to the seat cushion frame, and the control device acquires a first rotation angle signal related to a rotation angle of the seat back frame with respect to the seat cushion frame and a second rotation angle signal related to a rotation angle of the upper side frame with respect to the lower side frame, and controls a protruding amount of the movable body based on the first rotation angle signal and the second rotation angle signal.

According to the above configuration, the protrusion amount of the movable body is controlled according to the rotation angle and the middle folding angle of the seat cushion frame, so that a comfortable posture can be taken for the seated user.

Further, the vehicle seat preferably includes a lifting mechanism that supports the first movable body so as to be vertically movable with respect to the seat back frame.

According to this configuration, the first movable body can be lifted and lowered in the up-down direction in accordance with the body shape of the seated user. Thus, a comfortable posture can be taken for the seated user.

Preferably, the lifting mechanism supports the second movable body so as to be vertically movable with respect to the seat back frame, and the control device controls the lifting mechanism so that the first movable body is lifted and lowered in accordance with a position of the second movable body in the vertical direction.

According to the above configuration, the first movable body is lifted and lowered in accordance with the position in the up-down direction of the second movable body disposed below the first movable body. Thus, the first movable body is caused to protrude in association with the second movable body in accordance with the body shape of the occupant, and the vehicle seat can be appropriately deformed in accordance with the body shape of the occupant. Thus, a comfortable posture can be taken for the seated user.

Further, the movable body preferably includes a left and right third movable body disposed at a position between the first movable body and the second movable body in a vertical direction of the seat back frame, and the third movable body includes a plurality of inflatable/contractible bag bodies which are stacked, have different sizes, and are disposed in different directions.

According to the above configuration, the user is supported by the third movable body in addition to the first movable body and the second movable body, and thus the support performance of the user can be improved. Further, the third movable body can be deformed into a flexible shape and size, and the seated user can be appropriately supported in accordance with the body shape of the seated user.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, by appropriately deforming the shape of the vehicle seat, a comfortable posture can be taken for the seated user.

Further, the seated user can be properly supported according to the posture and body shape of the seated user, so that a comfortable posture can be taken for the seated user.

Moreover, a comfortable posture can be adopted for the seated user corresponding to various running states.

Further, the user can be appropriately supported in accordance with the body shape of the user, and the user can be appropriately supported with respect to the load received in the lateral direction during traveling.

Drawings

Fig. 1 is an explanatory diagram of a basic structure of a vehicle seat according to a first embodiment.

Fig. 2 is a perspective view of the seat frame.

Fig. 3 is a front view of the seat back frame.

FIG. 4A is a sectional view of FIG. 1A-a showing a state where the shoulder fluid bag is contracted.

FIG. 4B is a sectional view of FIG. 1 A-A, showing a state in which the shoulder fluid bag has been inflated.

Fig. 5 is a block diagram showing a functional structure of a seat frame.

Fig. 6 is a block diagram showing a functional configuration of the ECU.

Fig. 7A is a diagram showing the inflated/deflated state of the shoulder fluid bag and the waist fluid bag when the posture of the seated user is determined to be humpback.

Fig. 7B is a diagram showing the state of expansion/contraction of the shoulder fluid bag and the waist fluid bag when the posture of the seated user is determined to be the reverse bow waist.

Fig. 8 is a front view showing a first modification of the seat back frame.

Fig. 9 is a front view showing a second modification of the seat back frame.

FIG. 10A is a sectional view of FIG. 9B-B, showing a plate in a normal position.

Fig. 10B is a view showing a state in which the plate is in the protruding position.

FIG. 11A is a sectional view of FIG. 9B-B, showing a state where the fluid bag is in a normal position.

Fig. 11B is a view showing a state where the fluid bag is in the protruding position.

Fig. 12 is a perspective view of a seat frame of the second embodiment.

Fig. 13 is a side view of the seat frame, and is an enlarged view of a main portion.

Fig. 14 is a block diagram showing a functional configuration of the ECU.

Fig. 15 is a perspective view of a seat back frame of the third embodiment.

Fig. 16 is a view showing a state in which the brace apparatus is detached from the seat back frame.

Fig. 17 is a rear view of the support member.

Fig. 18 is an explanatory diagram of a basic structure of a vehicle seat according to a fourth embodiment.

Fig. 19 is a front view of the seat back frame.

FIG. 20 is a sectional view taken along line C-C of FIG. 19, showing a state in which the side fluid bag has been inflated.

Fig. 21 is a perspective view of a seat cushion frame of a fifth embodiment.

FIG. 22 is a top view of a seat cushion frame.

Fig. 23 is a plan view of a seat cushion frame of a sixth embodiment.

Fig. 24 is a top view of a seat cushion frame of a seventh embodiment.

Fig. 25 is a view schematically showing a state in which the torsion spring biases the support member upward.

Fig. 26 is a view schematically showing a state in which the thigh fluid bag is biased upward against the support member.

Fig. 27 is a view schematically showing a state in which the elastic rotating body having a cam shape is biased upward against the support member.

Fig. 28 is a perspective view of a seat cushion frame of an eighth embodiment.

FIG. 29 is a cross-sectional view of FIG. 28, and is an explanatory view of the length adjusting mechanism.

FIG. 30 is a block diagram of a length adjustment mechanism for a seat cushion.

Fig. 31 is an explanatory diagram of a basic structure of a vehicle seat of a ninth embodiment.

Fig. 32 is a perspective view of the cushion body, the first cover member, and the second cover member of the seat cushion.

Fig. 33 is an explanatory diagram of a basic structure of a vehicle seat of the tenth embodiment.

Fig. 34 is a partial cross-sectional view of the vehicle seat as seen from the side.

Fig. 35 is a block diagram showing the functional configuration of the ECU.

FIG. 36 is a view showing a state in which the airbag is contracted, and is a partial cross-sectional view in which a main portion of the seat cushion is enlarged.

Fig. 37 is a view showing a state in which the front of the airbag has been inflated, and is a partial cross-sectional view in which the main portion of the seat cushion is enlarged.

Fig. 38 is a diagram showing a flow of processing performed by the ECU.

Fig. 39 is an explanatory diagram of a basic structure of a vehicle seat of the eleventh embodiment.

Fig. 40 is a view illustrating a contracted state and a protruded state of the fluid bag.

Fig. 41 is an explanatory diagram of a basic structure of a vehicle seat of a twelfth embodiment.

FIG. 42 is a cross-sectional view A-A of FIG. 41.

FIG. 43 is a cross-sectional view A-A of FIG. 41, showing an example in which the recess of the seat cushion pad includes a convex portion.

Fig. 44 is a view showing a connector accommodated in a recess of a seat cushion pad.

Fig. 45 is a plan view of a seat cushion pad according to a modification.

FIG. 46 is a sectional view B-B of FIG. 45.

Detailed Description

< first embodiment >, first embodiment

Hereinafter, a vehicle seat according to a first embodiment of the present invention will be described with reference to the drawings. However, the embodiments described below are for the convenience of understanding the present invention, and do not limit the present invention. That is, the present invention may be modified and improved without departing from the gist thereof, and the present invention naturally includes equivalents thereof.

In the following description, the term "front-rear direction" refers to a front-rear direction when viewed from a seated user of the vehicle seat, and is a direction that coincides with a traveling direction of the vehicle. The term "seat width direction" refers to a transverse width direction of the vehicle seat, which coincides with a left-right direction when viewed from a seated person of the vehicle seat. Hereinafter, the term "left" means left when viewed from a seated user, and the term "right" means right when viewed from a seated user. The term "height direction" means a height direction of the vehicle seat, which coincides with a vertical direction when the vehicle seat is viewed from the front.

In the following description, the directions with respect to the vehicle seat are shown in the case where the "seat" is described as being attached to various directions such as the "seat width direction" and the "seat height direction". When the "vehicle" is described as being attached to the "vehicle inside" or "vehicle outside", the direction relative to the vehicle is indicated.

The "vehicle outside" in the seat width direction refers to the outside of the vehicle body (in short, the side closer to the nearest door), and the "vehicle inside" refers to the inside of the vehicle body (in short, the side farther from the nearest door).

The vehicle seat S1 according to the first embodiment will be described with reference to fig. 1 to 7.

Main structure of vehicle seat

First, the basic structure of the vehicle seat S1 will be described with reference to fig. 1.

Fig. 1 is a perspective view showing a basic structure of a vehicle seat S1. As shown in fig. 1, the vehicle seat S1 includes a seat cushion S11, a seat back S12, and a headrest S13.

The seat cushion S11 is configured by covering the seat cushion frame 10 (see fig. 2) with a seat cushion pad S11a and a skin material S11 b. The seat back S12 is configured by covering the seat back frame 20 (see fig. 2) with a seat back cushion S12a and a skin material S12 b. The headrest S13 is configured by covering the stay S13c with a headrest cushion S13a and a skin material S13 b.

The seat back S12 incorporates a left and right shoulder brace 30 and a lumbar brace 35 between the seat back frame 20 and the skin material S12 b. The left and right shoulder braces 30 and the lumbar brace 35 will be described later.

Fig. 2 is a perspective view of the seat frame 1. The vehicle seat S1 includes a seat frame 1 as its skeleton. The seat frame 1 is mainly constituted by a seat cushion frame 10 and a seat back frame 20.

The seat frame 1 is fixed to a slide mechanism 3 that slides and moves the vehicle seat S1 in the front-rear direction via a height adjustment mechanism 4.

The seat cushion frame 10 mainly includes a cushion side frame 11 as a side frame, a base frame 12, a rear pipe 13 as a connecting pipe, and a plurality of elastic springs 14.

The cushion side frames 11 are disposed one on each of the left and right sides of the seat cushion frame 10. The cushion side frames 11 extend in the front-rear direction.

The base frame 12 is connected to the left and right cushion side frames 11 via the front end sides of the left and right cushion side frames 11.

The rear pipe 13 is connected to the left and right cushion side frames 11 via rear end sides of the left and right cushion side frames 11.

Each elastic spring 14 is engaged with the base frame 12 and the rear tube 13, and extends in the seat front-rear direction while meandering.

Next, as shown in fig. 2, the seat back frame 20 is a substantially rectangular frame-like body. The seat back frame 20 is rotatable about the rotation axis 2 with respect to the seat cushion frame 10.

The seat back frame 20 mainly includes left and right back side frames 21, an upper frame 22, and a lower frame 23.

The seat back frame 20 further has: a horizontal connecting frame 24 connecting upper portions of the left and right back side frames 21; and a vertical connecting frame 25 connecting the upper frame 22 and the horizontal connecting frame 24.

The back side frames 21 are disposed one on each of the left and right sides of the seat back frame 20. The back side frame 21 extends in the up-down direction. The back side frame 21 includes a plate-like member.

The upper frame 22 connects upper ends of the left and right back side frames 21. The upper frame 22 is a tubular body having an inverted U-shape.

The lower frame 23 connects lower ends of the left and right back side frames 21. The lower frame 23 is a plate-like body. The upper frame 22 and the lower frame 23 extend in the seat width direction.

The horizontal coupling frame 24 couples upper portions of the left and right seat back frames 20. The horizontal connecting frame 24 is a plate-like body. The horizontal linking frame 24 extends in the seat width direction.

The vertical connecting frames 25 are provided on both sides of the horizontal connecting frame 24 in the seat width direction, and are interposed between the upper frame 22 and the horizontal connecting frame 24. The vertical connection frame 25 has a rectangular cross section and extends in the up-down direction.

Further, a shoulder brace 30 is attached to the upper portion of the seat back frame 20, specifically, the front surface of the vertical coupling frame 25. A lumbar support 35 is disposed below the shoulder support 30 and between the horizontal connection frame 24 and the lower frame 23. The lumbar support 35 is supported by a wire member 26 stretched between the horizontal connecting frame 24 and the lower frame 23.

The wire members 26 are disposed one on each of the left and right sides of the seat back frame 20. Specifically, the wire members 26 are vertically stretched on the left and right sides of the horizontal connecting frame 24 and the left and right sides of the lower frame 23.

Further, the seat back frame 20 includes a pillar mounting member 27 for mounting a pillar S13c of the headrest S13 at a center portion in the seat width direction of the upper frame 22.

As shown in fig. 3, left and right shoulder braces 30 for supporting both shoulders of the seated user are attached to the front surfaces of the left and right vertical coupling frames 25. The shoulder brace 30 includes a shoulder support plate 31 functioning as a base material, and a shoulder fluid bag 32 disposed on the shoulder support plate 31.

A lumbar support 35 for supporting the lumbar of the seated user is attached to the wire member 26. The lumbar support 35 has a lumbar support plate 36 functioning as a base material, and a lumbar fluid bag 37 disposed on the lumbar support plate 36.

About shoulder brace 30

The shoulder brackets 30 are attached to the rear surface of the seat back cushion S12a on the left and right sides in the seat width direction of the upper side of the seat back S12. The shoulder brace 30 is mounted on the front surface of the vertical coupling frame 25 at the overlapping portion where the horizontal coupling frame 24 is coupled.

The shoulder support plate 31 constituting the shoulder brace 30 is a plate member long in the seat width direction. The shoulder support plate 31 is erected on the front surface of the vertical joint frame 25 and the front surface of the back side frame 21.

The shoulder fluid bags 32 are disposed on the front surface sides of the left and right shoulder support plates 31. The shoulder fluid bag 32 has a hexagonal shape elongated in the seat width direction, and extends so as to protrude outward in the seat width direction from the vertical coupling frame 25.

As shown in fig. 4A, three shoulder fluid bags 32 are provided on the front surface of the shoulder support plate 31.

The shoulder fluid bag 32 is attached to the shoulder support plate 31 by an attachment member 33 provided at the inner end portion in the seat width direction in the front surface of the shoulder support plate 31. The shoulder fluid bag 32 is inflated to protrude toward the seat front side by injecting compressed air in a contracted state.

The three shoulder fluid bags 32 are each of a different size from each other. In detail, the capacity of the first shoulder fluid pocket 32a located at the seat front-most side is smaller than the capacities of the second shoulder fluid pocket 32b and the third shoulder fluid pocket 32 c. The capacity of the second shoulder fluid bag 32b located on the rear side of the first shoulder fluid bag 32a is larger than the capacities of the first shoulder fluid bag 32a and the third shoulder fluid bag 32 c. The capacity of the third shoulder fluid bag 33c located on the rear side of the second shoulder fluid bag 32b is larger than the capacity of the first shoulder fluid bag 32a and smaller than the capacity of the second shoulder fluid bag 32 b.

As shown in fig. 4A and 4B, the first shoulder fluid bag 32a, the second shoulder fluid bag 32B, and the third shoulder fluid bag 32c are bulged and protruded in mutually different directions by injecting compressed air. In this way, the first shoulder fluid bag 32a, the second shoulder fluid bag 32b, and the third shoulder fluid bag 32c are disposed in mutually different directions, and when compressed air is injected, expand/contract (bulge and contract) in mutually different directions and with mutually different capacities (protruding amounts). This allows the protruding direction or the protruding amount of the seat back S12 to be flexibly adjusted.

The first shoulder fluid bag 32a, the second shoulder fluid bag 2b, and the third shoulder fluid bag 32c may be inflated and protruded in the initial state (normal state). This can suppress wrinkling or overstretching of the skin material S12b of the seat back S12. In addition, the number of shoulder fluid bags 32 is not limited to three. Two shoulder fluid bags 32 may be provided, and four or more shoulder fluid bags 32 may be provided.

The shoulder fluid bag 32 corresponds to the bag body and the movable body, and corresponds to the first movable body and the shoulder movable body.

The operation of the shoulder fluid bag 32 configured as described above will be described. The ECU 50 described later controls the flow of compressed air supplied to the shoulder fluid bag 32. Thereby, the shoulder brace 30 deforms between the contracted state shown in fig. 4A and the protruding state shown in fig. 4B.

Fig. 4A is a sectional view A-A of fig. 1, showing a contracted state of the shoulder brace 30. The shoulder fluid bag 32 is contracted between the shoulder support plate 31 and the skin material S12b in the seat front-rear direction.

Fig. 4B is a sectional view A-A of fig. 1, showing a protruding state of the shoulder brace 30. The shoulder fluid bag 32 is disposed in a state of being inflated between the shoulder support plate 31 and the skin material S12b in the seat front-rear direction so as to protrude forward.

Specifically, when the compressed air is supplied from the actuator 55 described later, the shoulder fluid bag 32 in the contracted state is inflated. Thus, the portion of the seat back S12 supporting the shoulder of the seated user is deformed toward the seat front, and the protruding state shown in fig. 4B is obtained.

Also, when the compressed air injected into the inside of the shoulder fluid bag 32 is discharged, the shoulder fluid bag 32 is contracted. Thereby, the portion of the seat back S12 supporting the shoulder of the seated user is deformed toward the seat rear, and returns to the contracted state shown in fig. 4A.

About waist brace 35

Returning to fig. 3, the lumbar support 35 will be described. The lumbar support 35 is attached to the back surface of the seat back cushion S12a below the shoulder support 30 of the seat back S12.

The lumbar support plate 36 constituting the lumbar support 35 is a plate member having a substantially rectangular shape. The lumbar support plate 36 is bridged between the left and right wire members 26.

A lumbar fluid bag 37 is supported on the front surface of the lumbar support plate 36. The waist fluid bag 37 has a plurality of waist fluid bags 37 like the shoulder fluid bag 32. The plurality of waist fluid pockets 37 may have equal capacities or different capacities.

The waist fluid bag 37 corresponds to a bag body and a movable body, and corresponds to a second movable body and a waist movable body.

The ECU 50, which will be described later, controls the flow of compressed air with respect to the waist fluid bag 37. Thereby, the lumbar support 35 deforms between the contracted state and the protruding state.

The waist fluid bag 37 is supplied with compressed air from an actuator 55 described later, and is inflated from a contracted state. Thus, the portion of the seat back S12 supporting the waist of the seated user protrudes toward the seat front.

Also, when the compressed air injected into the inside of the waist fluid pouch 37 is discharged, the waist fluid pouch 37 contracts. Thereby, the portion of the seat back S12 supporting the waist of the seated user is deformed toward the seat rear, and returns to the contracted state.

Functional structure of vehicle seat S1

Next, the functional structure of the vehicle seat S1 will be described.

Fig. 5 shows a functional structure of the vehicle seat S1. As described above, the vehicle seat S1 has the shoulder fluid bag 32 and the lumbar fluid bag 37. The supply of compressed air to the shoulder fluid bag 32 and the waist fluid bag 37 is performed by the actuator 55. The compressed air supplied from the actuator 55 is injected into the shoulder fluid bag 32 and the waist fluid bag 37 through the inside of the tube forming the air passage. Each of the air passages is provided with a solenoid valve 56 for adjusting the injection amount of the compressed air.

The fluid to be injected into the shoulder fluid bag 32 and the waist fluid bag 37 is not limited to compressed air. The shoulder fluid bag 32 or the waist fluid bag 37 may also be inflated by injecting liquid. The shoulder fluid bag 32 and the waist fluid bag 37 may be either one of a compressed air bag inflated by compressed air and a liquid bag inflated by liquid, or may be a combination of a compressed air bag and a liquid bag. Since the compressed air and the liquid have different elastic moduli, the elasticity of the shoulder fluid bag 32 and the waist fluid bag 37 can be flexibly adjusted by combining the compressed air bag and the liquid bag.

The vehicle seat S1 may also incorporate a heater 57. By incorporating the heater 57 in the vehicle seat S1, the body of the occupant can be heated from the back, and the comfort of the occupant can be improved particularly in winter.

The vehicle seat S1 may also incorporate the vibration applying device 58. By incorporating the vibration imparting device 58 in the vehicle seat S1, the blood flow of the occupant who drives for a long period of time can be promoted, and fatigue can be reduced.

The vehicle seat S1 includes a control device that controls the actuator 55 and the solenoid valve 56. The control device includes an electronic control unit (Electronic Control Unit, ECU) 50 mounted in the vehicle. The ECU 50 controls the expansion/contraction of the shoulder fluid bag 32 and the waist fluid bag 37 by controlling the on-off of the actuator 55 or the opening degree of the solenoid valve 56. As a result, the shoulder and waist of the vehicle seat S1 deform in accordance with the shape of the occupant, and the occupant' S support is improved.

Further, the ECU 50 communicates with various sensors provided in the vehicle through an in-vehicle network, thereby acquiring detection values of the various sensors. The various sensors include a weight sensor 40 capable of detecting a sitting state, a vehicle speed sensor 41 capable of detecting a vehicle speed, a steering angle sensor 42 capable of detecting a steering angle, pressure sensors 43 of the shoulder fluid bag 32 and the waist fluid bag 37, a bulge pressure sensor 44, and a rotation angle sensor 45.

The weight sensor 40 detects a load acting on the vehicle seat S1. The ECU 50 may determine the presence or absence of the seated user based on the detection value of the weight sensor 40.

The vehicle speed sensor 41 and the steering angle sensor 42 detect the running state of the vehicle. The ECU 50 estimates the running state of the vehicle based on the detection results of the vehicle speed sensor 41 and the steering angle sensor 42, and controls the shoulder fluid bag 32 and the waist fluid bag 37 to expand/contract in real time based on the estimation results. In other words, the injection amounts of the compressed air with respect to the shoulder fluid bag 32 and the waist fluid bag 37 are controlled so that the occupant can take an appropriate posture with respect to the running state of the vehicle.

Bulge pressure sensors 44 are mounted to each of the fluid bags to detect the pressure generated by the compressed air injected into the shoulder fluid bag 32 and the waist fluid bag 37. A pressure sensor 43 is mounted to each of the respective fluid bags to detect the load generated by the seated user. The pressure sensor 43 is mounted to the front surface of the shoulder fluid bag 32 and the waist fluid bag 37. The ECU 50 controls the injection amounts of the compressed air into the shoulder fluid bag 32 and the waist fluid bag 37 based on the pressure signals output from the pressure sensor 43 and the bulge pressure sensor 44. The ECU 50 stops the injection of the compressed air based on the pressure signals output from the pressure sensor 43 and the bulge pressure sensor 44 so as not to excessively expand the shoulder fluid bag 32 and the waist fluid bag 37.

The rotation angle sensor 45 detects the rotation angle of the seat back S12 with respect to the seat cushion S11. The ECU 50 may determine that the seatback S12 is in the reclining state that has been rotated to the rear based on the detection value of the rotation angle sensor 45. The ECU 50 controls to inject compressed air into the shoulder fluid bag 32 and the lumbar fluid bag 37 when it is determined that the seat back S12 is in the leaning state, thereby effectively supporting the shoulders and the lumbar of the seated user in the resting state.

Fig. 5 illustrates a weight sensor 40, a vehicle speed sensor 41, a steering angle sensor 42, a pressure sensor 43, a bulge pressure sensor 44, and a rotation angle sensor 45, but is not limited thereto. For example, a road surface sensor that detects a road surface condition by capturing a road surface condition during traveling may be included. The vehicle seat S1 may also detect a driving mode of the vehicle (for example, in running in an automatic driving mode).

Functional structure related to ECU

Fig. 6 shows a functional configuration of the ECU 50. As shown in fig. 6, the ECU 50 has an acquisition unit 51, a determination unit 52, and a drive unit 53 as main functional configurations. The ECU 50 loads a program from a nonvolatile memory (not shown) and is executed by a processor (not shown) as a hardware resource, thereby functioning as the acquisition unit 51, the determination unit 52, and the driving unit 53.

The acquisition unit 51 acquires detection values of various sensors provided in the vehicle. Specifically, the acquisition unit 51 acquires the detection values of the weight sensor 40, the vehicle speed sensor 41, the steering angle sensor 42, the pressure sensor 43, the bulge pressure sensor 44, and the rotation angle sensor 45. The acquisition unit 51 has an analog-to-digital converter (Analog Digital Converter, ADC) capable of converting analog signals output from various sensors into digital signals. The acquisition unit 51 has a Noise removal filter, and removes signals of a band including a Noise component, thereby increasing the ratio (Signal Noise (S/N) ratio) of Signal power to Noise power.

The determination unit 52 determines the sitting posture of the seated user based on the detection value acquired by the acquisition unit 51. To explain in more detail, the determination unit 52 determines the posture that corresponds to the sitting posture of the seated user from five of "humpback", "slight humpback", "ideal posture", "slight reversed bow waist", and "reversed bow waist".

The determination unit 52 has a determination condition table defining a determination condition for determining which of the five sitting postures corresponds. The determination unit 52 determines the sitting posture of the occupant by comparing the detection values of the pressure sensor 43 and the bulge pressure sensor 44 with the determination conditions specified in the determination condition table.

The detection values of the pressure sensor 43 and the bulge pressure sensor 44 are set arbitrarily by editing the determination condition table, which of the five sitting postures corresponds to. The sitting posture candidates are not limited to the above-described five postures, and may be arbitrarily determined.

The driving unit 53 outputs a control signal to the actuator 55 and the solenoid valve 56 based on the determination result of the determination unit 52 so that the seated user can take an appropriate posture. Thereby, the shoulder fluid bag 32 and the waist fluid bag 37 are inflated and protruded or contracted. The determination result of the determination unit 52 and the control of the expansion/contraction of the shoulder fluid bag 32 and the waist fluid bag 37 by the driving unit 53 will be described in further detail with reference to fig. 7A and 7B.

Fig. 7A shows the expanded/contracted states of the shoulder fluid bag 32 and the waist fluid bag 37 when the determination unit 52 determines the sitting posture of the seated user as "humpback". As shown in fig. 7A, when the "humpback" is determined, the driving portion 53 greatly bulges the shoulder fluid bag 32. The driving unit 53 contracts the waist fluid bag 37 based on the protruding amount (i.e., the expansion amount) of the shoulder fluid bag 32. This reduces the burden on the back of the seated user who bends so as to protrude rearward, and can reduce fatigue and improve comfort. Here, the protruding amount of the shoulder fluid bag 32 may be estimated based on the output signal of the bulge pressure sensor 44 attached to the shoulder fluid bag 32. The protruding amount of the shoulder fluid bag 32 may be estimated based on the opening degree of the solenoid valve 56.

Fig. 7B shows the expanded/contracted states of the shoulder fluid bag 32 and the waist fluid bag 37 when the determination unit 52 determines the sitting posture of the seated user as "reverse bow waist". As shown in fig. 7B, when the "reverse bow waist" is determined, the driving unit 53 greatly bulges the waist fluid bag 37. The driving unit 53 contracts the shoulder fluid bag 32 based on the protruding amount (i.e., the expansion amount) of the waist fluid bag 37. Thus, the back of the seated user bending in a manner of being reversed to the front can be properly supported, and the burden on the seated user can be reduced, thereby reducing fatigue and improving comfort. Here, the protruding amount of the waist fluid pocket 37 can be estimated based on the output signal of the bulge pressure sensor 44 attached to the waist fluid pocket 37. The protruding amount of the waist fluid bag 37 may be estimated based on the opening degree of the solenoid valve 56.

In this way, when the shoulder fluid bag 32 and the waist fluid bag 37 are controlled to protrude, the driving unit 53 controls the protruding amount of the other so as to be smaller in real time when the protruding amount of either one is large. Here, real time means that when the protrusion amount of either one of the shoulder fluid bag 32 and the waist fluid bag 37 is detected to be large, the protrusion amount of the other is controlled to be small, but the two are not necessarily strictly simultaneous. For example, the seated user may not feel uncomfortable due to the deviation of the timing of the expansion/contraction of the shoulder fluid bag 32 and the waist fluid bag 37.

Here, the driving unit 53 compares the pressure signal output from the bulge pressure sensor 44 with a predetermined threshold value, and stops or restricts the supply of the compressed air based on the comparison result. In other words, when the detection value of the bulge pressure sensor 44 exceeds a predetermined value, the supply amount of the compressed air to be supplied to the shoulder fluid bag 32 and the waist fluid bag 37 is restricted. This suppresses excessive inflation of the shoulder fluid bag 32 and the waist fluid bag 37, and can properly support the seated user in accordance with the posture and the body shape of the seated user. Thus, the seated user can take a comfortable posture.

The driving unit 53 may control the amount of compressed air to be injected into the shoulder fluid bag 32 and the waist fluid bag 37 based on the detection values of the vehicle speed sensor 41 and the steering angle sensor 42. For example, the driving unit 53 may estimate the load to be applied to the occupant based on the vehicle speed signal output from the vehicle speed sensor 41 and the steering angle signal output from the steering angle sensor 42, and may expand the shoulder fluid bag 32 and the waist fluid bag 37 in real time based on the estimation result. This can quickly improve the support of the seated user.

The driving unit 53 may control the expansion/contraction of the shoulder fluid bag 32 and the waist fluid bag 37 based on the output signal of the road surface sensor, the signal related to the driving mode (for example, a signal indicating that the vehicle is being driven in the automatic driving mode), or the output signal of the rotation angle sensor 45. This allows the user to be flexibly supported according to the traveling situation or the posture of the user, and reduces the burden on the user.

The description has been made with respect to the drive unit 53 controlling the actuator 55 and the solenoid valve 56 based on the determination result of the determination unit 52, but the present invention is not limited thereto. The driving unit 53 may control the protruding amount of either one of the shoulder fluid bag 32 and the waist fluid bag 37 based on the protruding amount of the other, regardless of the determination result of the determining unit 52. Thus, the protruding amounts of the shoulder fluid bag 32 and the waist fluid bag 37 can be controlled more quickly. However, the posture of the seated user is determined by the determination unit 52, and control is performed based on the determination result to expand/contract the shoulder fluid bag 32 and the waist fluid bag 37, whereby the seated user can be supported more accurately according to the posture of the seated user. Thus, a comfortable posture can be taken for the seated user.

First modification example

The configuration of the vehicle seat S1 has been described above, but the above-described embodiment is merely an example for facilitating understanding of the present invention, and the present invention is not limited thereto. That is, the present invention may be modified and improved without departing from the gist thereof, and the present invention naturally includes equivalents thereof.

The shoulder brace 30A of the first modification will be described with reference to fig. 8. In the embodiment described, the shoulder brace 30 has been described as having a shoulder support plate 31 and a shoulder fluid bag 32. In contrast, the shoulder brace 30A of the first modification includes a shoulder support plate 31, an inner shoulder fluid bag 32A disposed at an inner position in the lateral direction, and an outer shoulder fluid bag 32B disposed at an outer position.

The pressure sensor 43 and the bulge pressure sensor 44 are attached to the inner shoulder fluid bag 32A and the outer shoulder fluid bag 32B, respectively. The ECU 50 controls the supply of the compressed air based on the detection values of the pressure sensor 43 and the bulge pressure sensor 44. To be described in detail, the determination unit 52 of the ECU 50 determines the body shape of the seated user (more specifically, the shoulder width of the seated user) based on the detection values of the pressure sensor 43 and the bulge pressure sensor 44. When the judgment unit 52 estimates that the shoulder width of the seated user is narrow, the driving unit 53 expands the inner shoulder fluid bag 32A. On the other hand, when the judgment unit 52 estimates the shoulder width of the seated user, the driving unit 53 expands the outside shoulder fluid bag 32B. This can improve the support of the seated user in accordance with the figure of the seated user.

The driving unit 53 estimates the centrifugal force received by the seated user based on the detection values of the vehicle speed sensor 41 and the steering angle sensor 42, and expands the inside shoulder fluid bag 32A and the outside shoulder fluid bag 32B based on the estimation results. This makes it possible to properly support the seated user against the centrifugal force received by the seated user during traveling.

The inner shoulder fluid bag 32A corresponds to the inner first movable body, and the outer shoulder fluid bag 32B corresponds to the outer first movable body.

Second modification example

Next, a vehicle seat S1 according to a second modification will be described. The vehicle seat S1 of the second modification includes the biasing member 34 on the inner side in the seat width direction of the shoulder bracket 30. The biasing member 34 biases the seat back cushion S12a and the skin material S12b around the scapula of the occupant forward.

Fig. 9 is a front view of a seat back frame 20B of a second modification. As shown in fig. 9, in the seat back frame 20B of the second embodiment, a biasing member 34 is attached to the front surface of the horizontal coupling frame 24 on the inner side in the seat width direction of the shoulder bracket 30.

As shown in fig. 10A, the urging member 34 has a plate 34a, a rotation shaft 34b, and an elastic member (not shown). The plate 34a is urged forward by an elastic member including a torsion spring. As shown in fig. 10B, the plate 34a rotates about a rotation shaft 34B extending in the vertical direction, and the seat back pad S12a and the skin material S12B located in front of the plate 34a protrude forward. Thus, when the user operates the steering wheel, the back around the scapula is prevented from leaving the seat back S12, and the support of the user' S back is improved.

The structure of the urging member 34 is not limited to the above-described structure. For example, the elastic member is described as a torsion spring, but may be a fluid bag. At this time, the plate 34a is biased forward by supplying fluid to the fluid bag. Further, by controlling the fluid supplied to the fluid bag, the force applied can be flexibly adjusted.

Third modification example

The urging member 34 of the third modification example has a fluid bag 34c instead of the plate 34 a. As shown in fig. 11A, the urging member 34 includes a fluid bag 34c, a rotation shaft 34b, and an elastic member (not shown). The fluid bag 34c is biased forward by an elastic member including a torsion spring, for example. As shown in fig. 11B, the fluid bladder 34c rotates about a rotation axis 34B extending in the vertical direction, and the seat back cushion S12a and the skin material S12B located in front of the fluid bladder 34c protrude forward. This can improve the support of the back around the scapula of the seated user. Further, by controlling the compressed air supplied to the fluid bladder 34c, the protruding amounts of the seat back cushion S12a and the skin material S12b can be flexibly adjusted.

The expansion/contraction of the fluid bag 34c may be controlled based on the detected values of the vehicle speed sensor 41 and the steering angle sensor 42, so that the protruding amounts of the seat back cushion S12a and the skin material S12b may be adjusted in real time.

< second embodiment >

A vehicle seat according to a second embodiment will be described below with reference to fig. 12 to 14. The vehicle seat of the second embodiment has a mid-fold seat back frame 220. The vehicle seat according to the second embodiment includes: a rotation angle sensor 245 that detects a rotation angle of the seat back frame 220 with respect to the seat cushion frame 210; and a center-turn angle sensor 246 that detects the center-turn angle of the seat back frame 220. The ECU 250 responsible for control of the vehicle seat determines that the vehicle seat is in a reclining state based on the detection values of the rotation angle sensor 245 and the medium folding angle sensor 246, and controls expansion/contraction of the shoulder fluid bag 232 provided to the shoulder bracket 230 based on the determination result.

Main structure of seat frame

Fig. 12 is a perspective view of a seat frame 201 of the second embodiment. The seat frame 201 has a seat cushion frame 210 and a seat back frame 220 as main constituent members.

The seat back frame 220 is a substantially rectangular frame body and is rotatable about the rotation axis 202 with respect to the seat cushion frame 210. The seat back frame 220 mainly includes left and right back side frames 221, an upper frame 222, and a lower frame 223.

The seat back frame 220 further has: a horizontal connection frame 224 connecting upper portions of the left and right back side frames 221; and a vertical connection frame 225 connecting the upper frame 222 and the horizontal connection frame 224.

The back side frames 221 are disposed one on each of the left and right sides of the seatback portion frame 220. The back side frame 221 extends in the up-down direction.

The back side frame 221 has: a lower side frame 221a; a connection frame 221b attached to an upper end portion of the lower frame 221a and rotatable in a front-rear direction with respect to the lower frame 221a; and a driving mechanism 260 for rotating the connection frame 221 b.

Lower frames 223 are erected at lower end portions of the left and right lower frames 221a to connect the lower frames 221a.

The left and right connecting frames 221b are rotatably connected to the upper end of the lower frame 221a around the center-folding shaft 227. The connection frame 221b connects the right and left lower frames 221a and the vertical portion 222a extending in the up-down direction below the upper frame 222. The connection frame 221b and the vertical portion 222a correspond to upper side frames.

The upper frame 222 has a horizontal portion 222b connecting the vertical portions 222a with each other with the vertical portion 222a interposed therebetween. The horizontal portion 222b corresponds to an upper frame.

A shoulder brace 230 for supporting both shoulders of the seated user is mounted to the left and right vertical connection frames 225. A shoulder fluid bag 232 is disposed on the front surface of the shoulder brace 230. The shoulder fluid bag 232 is disposed at a position sandwiched by the left and right vertical portions 222a in the seat width direction.

Below the shoulder brace 230, a lumbar brace 235 is provided that is supported by the wire members 226 to support the lumbar of the seated user. A lumbar fluid bag 237 is disposed on the front surface of the shoulder brace 230.

The shoulder fluid bag 232 and the waist fluid bag 237 are inflated by the fluid supplied when the back side frame 221 is in the leaning state. This improves the comfort of the seated user resting while sitting on the vehicle seat S201.

Next, the driving mechanism 260 will be described.

Fig. 13 is a side view of the back side frame 221, and is an enlarged view of a main portion of the driving mechanism 260. The driving mechanism 260 has an actuator 261, a link member 262, a first connecting member 263, and a second connecting member 264.

As shown in fig. 13, the actuator 261 is fixed to the lower frame 221a above the lower frame 221 a. A lift lever 261a is attached to a front end of the actuator 261. The lift lever 261a is driven by the actuator 261 to lift up and down.

The front end of the lift lever 261a is coupled to the link member 262 via the first coupling member 263. The first connecting member 263 is guided by a long hole 228 formed in a side surface of the lower frame 221a, and moves up and down together with the elevating lever 261a and the link member 262.

The link member 262 has a long strip shape and extends up and down. The link member 262 is rotatably coupled to the elevating rod 261a on the lower side about the first coupling member 263. The link member 262 is rotatably coupled to the coupling frame 221b via a second coupling member 264 on the upper side.

When the operation of the driving mechanism 260 configured as described above is described, the user performs the middle-fold adjustment operation, and the actuator 261 is driven. When the actuator 261 is driven, the elevating rod 261a and the first connecting member 263 are guided by the long hole 228 to ascend. At this time, the link member 262 is tilted rearward about the first connecting member 263 and pushes out the second connecting member 264 upward. Thus, the coupling frame 221b rotatably coupled to the second coupling member 264 rotates about the center hinge 227 with respect to the lower frame 221 a.

Functional structure related to ECU 250

Next, the ECU 250 will be described. Fig. 14 shows a functional configuration of the ECU 250. The ECU 250 includes an acquisition unit 251, a determination unit 252, and a driving unit 253.

The acquisition unit 251 acquires detection values of the weight sensor 40, the vehicle speed sensor 41, the steering angle sensor 42, the pressure sensor 43, the bulge pressure sensor 44, the rotation angle sensor 245, and the angle of refraction sensor 246.

The rotation angle sensor 245 can detect the rotation angle of the seat back frame 220 relative to the seat cushion frame 210. The middle angle sensor 246 can detect the middle angle of the connecting frame 221b with respect to the lower frame 221 a.

The rotation angle output from the rotation angle sensor 245 corresponds to the first rotation angle signal, and the middle folding angle detected by the middle folding angle sensor 246 corresponds to the second rotation angle signal.

The determination unit 252 determines the state of the seat back frame 220 based on the rotation angle detected by the rotation angle sensor 245 and the center-folding angle sensor 246. To explain in more detail, the determination unit 252 determines which of the "normal state" and the "leaning state" the seat back frame 220 is in.

The normal state refers to, for example, a state in which the seat back frame 220 is substantially erected with respect to the seat cushion frame 210, and a state in which the connecting frame 221b is not folded with respect to the lower side frame 221 a.

On the other hand, the reclining state refers to a state in which the seat back frame 220 is tilted rearward relative to the seat cushion frame 210, and the coupling frame 221b is rotated relative to the lower frame 221a and folded in.

The determination unit 252 has a determination condition table defining a determination condition for determining which of the normal state and the leaning state corresponds to the combination of the detection values of the rotation angle sensor 245 and the center-folding angle sensor 246. The determination unit 252 compares the detection value acquired by the acquisition unit 251 with the determination conditions specified in the determination condition table, and thereby determines which of the "normal state" and the "leaning state" the seat back frame 220 is in.

The driving unit 253 controls the expansion/contraction of the shoulder fluid bag 32 and the waist fluid bag 37 based on the determination result of the determining unit 252. When the driver 253 determines that the seat back frame 220 is in the reclining state, the shoulder fluid bag 232 and the lumbar fluid bag 237 are inflated to receive the load of the occupant by the shoulder brace 230 and the lumbar brace 235. As described above, the vehicle seat according to the present embodiment can further improve the comfort of the user sitting on the leaning vehicle seat and resting. Further, by providing the shoulder fluid bag 232 and the lumbar fluid bag 237 in the seat back frame 220 folded in the connecting frame 221b and the vertical portion 222a, the posture support adjustment can be performed more finely.

< third embodiment >

A vehicle seat according to a third embodiment will be described below with reference to fig. 15 to 17. The vehicle seat of the third embodiment has a shoulder brace 330 and a lumbar brace 335 that are adjustable in position in the up-down direction. The shoulder brace 330 is controlled by the ECU 350 to be moved up and down in a coordinated manner in accordance with the position of the lumbar brace 335. At the shoulder brace 330, an inflatable/deflatable shoulder fluid bag 332 is mounted.

Structure of back frame of chair

Fig. 15 is a perspective view of a seat back frame 320 of the vehicle seat of the third embodiment. The seat back frame 320 is a generally rectangular frame-like body and is rotatable relative to the seat cushion frame.

As shown in fig. 16, the seat back frame 320 mainly includes left and right back side frames 321, an upper frame 322, a lower frame 323, and a brace device 360 having a lifting function.

The back side frames 321 are disposed one on each of the left and right sides of the seat back frame 320. The back side frame 321 extends in the up-down direction.

Upper frames 322 are interposed between upper ends of the left and right back side frames 321 to connect the left and right back side frames 321.

Lower frames 323 are erected at lower ends of the left and right back side frames 321 to connect the left and right back side frames 321.

In the center of the lower frame 323 in the left-right direction, two mounting holes 323a are formed that are disposed apart from each other. The mounting hole 323a penetrates the lower frame 323 in the front-rear direction. The mounting hole 323a is inserted with a fastener such as a screw for fixing a lower coupling member (not shown) of the brace apparatus 360 to the lower frame 323, which will be described later.

The seat back frame 320 further includes a horizontal coupling frame 324 that couples upper portions of the left and right back side frames 321.

The horizontal coupling frame 324 has a lower flange 324a extending forward at a lower edge. Support holes 324b are formed at both end sides of the lower flange 324a in the left-right direction. The support hole 324b penetrates in the up-down direction. The support hole 324b is inserted with a support wire 363 of the brace apparatus 360, which will be described later. The support wire 363 is fixed in a state of being suspended from the horizontal coupling frame 324.

The brace apparatus 360 receives a load generated when a seated user leans against the back of the seat. The brace apparatus 360 has a lifting mechanism 370 capable of lifting and lowering the shoulder brace 330 and the lumbar brace 335 supporting the shoulders and the lumbar of the seated user to support an appropriate portion corresponding to the body shape of the seated user.

The brace apparatus 360 has a pressure receiving member 361 and a support member 362 as main structures.

The pressure receiving member 361 has flexibility and is a plate-like member including a resin material. The pressure receiving member 361 extends vertically and is capable of receiving a load received from the back and waist of the seated user.

The pressure receiving member 361 has a central portion 361a located at the center in the left-right direction, and side portions 361b extending from the central portion 361a to both sides in the left-right direction. A plurality of openings are formed in the center portion 361a and the side portions 361b. The side portion 361b has a plurality of protruding portions. Thus, the pressure receiving member 361 can ensure flexibility required for receiving the load from the back and the waist of the seated user. In other words, the pressure receiving member 361 can support the back and the waist of the seated user in a wrapped manner while being deformed in the up-down direction and the left-right direction when the seated user sits.

Left and right mounting hooks 361c are formed at the upper end of the pressure receiving member 361. The mounting hook 361c is engaged with an engaged portion 364d of the support member 362 described later.

The support member 362 supports the pressure receiving member 361 from the rear of the pressure receiving member 361.

As shown in fig. 17, the support member 362 has a main structure of a support wire 363, an upper fixed plate 364, a guide wire 365, a lower fixed plate 366, a first movable plate 367, a second movable plate 368, a third movable plate 369, and a lifting mechanism 370. A shoulder brace 330 is mounted on the first movable plate 367. A lumbar support 335 is mounted between the second movable plate 368 and the third movable plate 369.

The support wire 363 is a pair of right and left wires fixed to the horizontal coupling frame 324 to hang the support member 362. The support wire 363 is inserted into left and right support holes 324b formed in the horizontal coupling frame 324 of the seatback frame 320 at the upper end portion thereof, and is fixed to the horizontal coupling frame 324. The support wire 363 is connected at its lower end portion to a horizontal support tube 364b disposed at an upper portion of the upper fixing plate 364.

The upper fixing plate 364 is located at an upper portion of the support member 362. The upper fixing plate 364 has an upper fixing plate body 364a, a horizontal support tube 364b, and left and right vertical support tubes 364c.

The upper fixing plate body 364a is a plate-like body having an elongated shape extending in the left-right direction. A first upper fixing member 374a of a lifting mechanism 370 described later is fixed to the upper fixing plate body 364 a. Further, a pair of engaged portions 364d (see fig. 16) are formed on the left and right sides of the first upper fixing member 374a in the upper fixing plate body 364a, and the attachment hooks 361c of the pressure receiving member 361 can be engaged.

The horizontal support tube 364b extends in the left-right direction along the upper edge of the upper fixing plate body 364 a. The horizontal support tube 364b is a circular tubular body. Support wires 363 are fixed to both end portions of the horizontal support tube 364b in the left-right direction.

The left and right vertical support pipes 364c extend in the up-down direction at both left and right end portions of the upper fixing plate body 365 a. The vertical support tube 364c is a hollow circular tubular body. An upper end portion of a guide wire 365, which will be described later, is inserted and fixed into the vertical support tube 364 c.

The guide wires 365 are wires extending in the up-down direction, and are arranged in parallel in a manner of being separated from each other in the left-right direction. The guide wire 365 guides the lifting operation of the first movable plate 367, the second movable plate 368, and the third movable plate 369 described later. The lower end of the guide wire 365 is fixed to the end in the left-right direction of the lower fixing plate 366.

The lower fixing plate 366 is located at a lower portion of the support member 362. The lower fixing plate 366 is a plate-like body having an elongated shape extending in the left-right direction.

Protrusions 366a are provided on the rear surface of the lower fixing plate 366 at positions spaced apart from each other. The projection 366a abuts against the front surface of the lower frame 323 when the support member 362 is assembled to the seatback frame 320.

Inside the protrusion 366a of the lower fixing plate 366 in the left-right direction, a through hole 366b is formed, and the through hole 366b is used for attaching a lower connecting member (not shown) for connecting the support member 362 to the lower frame 323.

The lower coupling member is fixed to a mounting hole 323a formed in the lower frame 323 using a fastening member such as a screw.

The first movable plate 367, the second movable plate 368, and the third movable plate 369 are plate-like bodies that can be lifted up and down by a lifting mechanism 370 described later.

The first movable plate 367 is located above the second movable plate 368 and the third movable plate 369. The first movable plate 367 has guided portions 367a extending vertically on both sides in the left-right direction. The left and right guided portions 367a have grooves slidable along left and right guide wires 365 extending in parallel in the up-down direction.

Shoulder brackets 330 are fixed to both end portions of the first movable plate 367 in the lateral direction. The shoulder brace 330 is provided with a shoulder fluid bag 332 (see fig. 15) in the same manner as in the above-described embodiment. By injecting or discharging fluid into or from the shoulder fluid bag 332, the shoulder fluid bag 332 can be inflated/deflated. As will be described later, the shoulder brace 330 moves up and down in conjunction with the lumbar brace 335. Thus, both shoulders of the seated user can be supported at appropriate positions according to the body shape of the seated user, and the support of the seated user can be improved.

The second movable plate 368 is located below the first movable plate 367 and above the third movable plate 369. The second movable plate 368 has guided portions 368a extending vertically at both ends in the lateral direction. The left and right guided portions 368a have grooves slidable along the left and right guide wires 365 extending in the up-down direction.

The third movable plate 369 is positioned below the first movable plate 367 and the second movable plate 368. The third movable plate 369 has guided portions 369a extending vertically at both ends in the left-right direction. The left and right guided portions 369a have grooves slidable along left and right guide wires 365 extending in the up-down direction.

The lumbar support 335 is a belt-shaped body that is disposed between the second movable plate 368 and the third movable plate 369 and is stretched on both left and right sides. The lumbar support 335 extends in the up-down direction. The upper end of the lumbar support 335 is fixed to the second movable plate 368. The lower end of the lumbar support 335 is fixed to the third movable plate 369.

The lumbar support 335 is deformed based on the relative positions of the second movable plate 368 and the third movable plate 369. In detail, when the second movable plate 368 and the third movable plate 369 are displaced from the positions separated from each other to the positions close to each other, the lumbar support 335 is bent and bulged forward. Thus, the waist of the seated user can be supported at an appropriate position according to the body shape of the seated user, and the support of the seated user can be improved.

The elevating mechanism 370 drives the first movable plate 367, the second movable plate 368, and the third movable plate 369 so as to change the positions thereof in the up-down direction. The elevating mechanism 370 has a screw 371, a motor 372, a transmission member 373, and a fixing member 374.

The screw 371 is a rod-shaped body having a male screw formed on an outer peripheral surface thereof, and extends in the up-down direction. The screw 371 has a first screw 371a, a second screw 371b, and a third screw 371c.

The first screw 371a transmits the driving force of the first motor 372a to the third movable plate 369, thereby displacing the third movable plate 369 in the up-down direction.

The upper end of the first lead screw 371a is fixed to the upper fixing plate 364 by a first upper fixing member 374 a. The lower end of the first screw 371a is fixed to the lower fixing plate 366 by a first lower fixing member 374 b.

The second screw 371b transmits the driving force of the second motor 372b to the second movable plate 368, and thus relatively displaces the second movable plate 368 with respect to the third movable plate 369.

The upper end of the second screw 371b is fixed to the second movable plate 368 by a second upper fixing member 374 c. The lower end of the second screw 371b is not fixed.

The third screw 371c transmits the driving force of the third motor 372c to the first movable plate 367, thereby relatively displacing the first movable plate 367 with respect to the third movable plate 369.

The upper end of the third screw 371c is fixed to the first movable plate 367 by a third upper fixing member 374 d. The lower end of the third screw 371c is not fixed.

The motor 372 is an electric motor that converts electric energy into rotational energy. The motor 372 has a first motor 372a, a second motor 372b, and a third motor 372c. The first motor 372a, the second motor 372b, and the third motor 372c are fixed to the third movable plate 369.

The transmission member 373 transmits rotational energy of the motor 372 to the screw 371 by engaging with an output shaft of the motor 372. The transmission member 373 has a first transmission member 373a, a second transmission member 373b, and a third transmission member 373c. The first transmission member 373a, the second transmission member 373b, and the third transmission member 373c are fixed to the third movable plate 369. The transmission member 373 is relatively movable up and down with respect to the screw 371.

The first motor 372a and the first transmission member 373a drive the third movable plate 369 to displace it in the up-down direction. The first motor 372a and the first transmission member 373a are displaced in the up-down direction relative to the brace device 360 together with the third movable plate 369.

The second motor 372b and the second transmission member 373b drive the second movable plate 368 to displace it in the up-down direction. The second movable plate 368 is displaced in the vertical direction relative to the third movable plate 369 together with the second screw 371 b.

The third motor 372c and the third transmission member 373c drive the first movable plate 367 to displace it in the up-down direction. The first movable plate 367 is displaced in the up-down direction relative to the third movable plate 369 together with the third screw 371 c.

The operation of the brace apparatus 360 configured as described above will be described. The first motor 372a is driven by the seated user performing the lifting operation of the shoulder brace 330 and the lumbar brace 335. The driving force of the first motor 372a is transmitted to the first screw 371a via the first transmission member 373a, and the third movable plate 369 is lifted and lowered in the up-down direction. At this time, the first movable plate 367 and the second movable plate 368 are also linked to the third movable plate 369 to be lifted and lowered in the up-down direction.

Here, when the second motor 372b is driven, the driving force of the second motor 372b is transmitted to the second screw 371b via the second transmission member 373b, and the second movable plate 368 is relatively lifted up and down with respect to the third movable plate 369. When the distance between the second movable plate 368 and the third movable plate 369 becomes smaller, the lumbar support 335 is deformed toward the front Fang Guchu. Thus, the waist of the seated user can be properly supported.

The third motor 372c is driven to move up and down the shoulder brace 330 in conjunction with the position of the lumbar brace 335 in the up-down direction. The driving force of the third motor 372c is transmitted to the third screw 371c via the third transmission member 373 c. Thus, the first movable plate 367 to which the shoulder brace 330 is attached is lifted up and down relative to the third movable plate 369. By linking the position of the shoulder brace 330 in the up-down direction to the position of the lumbar brace 335 in this way, the shoulder brace 330 and the lumbar brace 335 can be positioned appropriately according to the shape of the seated user. Thus, the comfort of the seated user can be improved.

The ECU 350 of the third embodiment may also control the expansion/contraction of the shoulder fluid bag 332 attached to the shoulder mount 330 based on the road surface condition, the steering angle of the steering wheel, the driving mode, and the turning angle of the seat back. This makes it possible to properly support the seated user according to the body shape and the running condition of the seated user.

The lumbar support 335 is illustrated as a belt-shaped body that is disposed between the second movable plate 368 and the third movable plate 369 and that is disposed on both left and right sides, but is not limited thereto. The lumbar support 335 may be a lumbar fluid pouch disposed on either the second movable plate 368 or the third movable plate 369. At this time, control may be performed such that the lumbar support 335 is inflated/deflated by the fluid supplied to the lumbar fluid bag.

< fourth embodiment >, a third embodiment

The vehicle seat S401 according to the fourth embodiment is described below with reference to fig. 18 to 20. The vehicle seat S401 has shoulder brackets 430 and side brackets 460 on both sides in the seat width direction. In the shoulder brace 430, a plurality of shoulder fluid bags are built in. Likewise, in the side brace 460, a plurality of side fluid bags 462 are built-in. The shoulder fluid bags and the side fluid bags 462 are inflated by injecting compressed air and deflated by discharging the compressed air. The plurality of shoulder fluid bags and the plurality of side fluid bags 462 have different sizes, are arranged in different directions, and protrude so as to bulge in different directions. Thus, the body of the seated person can be supported from the side appropriately and flexibly in accordance with the body shape of the seated person, and the support performance and the feeling of ease of mind of the seated person can be improved.

Basic structure of vehicle seat

Fig. 18 is a perspective view showing a basic structure of a vehicle seat S401 according to the fourth embodiment. As shown in fig. 18, the vehicle seat S401 has a seat cushion S411, a seat back S412, and a headrest S413 as main configurations.

The seatback S412 incorporates a seatback frame 420 (see fig. 19), left and right shoulder brackets 430, a lumbar bracket 435, and side brackets 460, which are respectively disposed inside the skin S412b (see fig. 20).

Fig. 19 is a front view of a seat back frame 420 constituting a skeleton of the vehicle seat S401. As shown in fig. 19, the seat back frame 420 is a substantially rectangular frame-like body.

The seat back frame 420 mainly includes left and right back side frames 421, an upper frame 422, and a lower frame 423. A pressure receiving member 424 is disposed between the seat back frame 420 and a seat back cushion (not shown). The pressure receiving member 424 is a resin plate-like body that receives pressure applied from the back and waist of the seated user.

The pressure receiving member 424 has an uppermost upper portion 424a, a central portion 424b wider than the upper portion 424a, and a lower portion 424c extending downward. The upper portion 424a, the central portion 424b, and the lower portion 424c are integrally formed to constitute a pressure receiving member 424.

A shoulder fluid bag 432 constituting the shoulder brace 430 is fixed to both sides in the left-right direction on the front side of the upper portion 424 a. By using the pressure receiving member 424 as the fixing member for the shoulder fluid bag 432 in this way, the number of parts can be reduced as compared with the case where a separate support member is provided, and the structure of the seat back frame 420 can be simplified.

The center portion 424b is disposed at a position sandwiched by the back side frames 421. The center portion 424b is curved and projected so that the portions thereof on both end sides in the seat width direction slightly face forward with respect to the portions thereof on the center in the seat width direction.

The lower portion 424c is narrower than the upper portion 424a by one turn, and its lower end extends downward until reaching the vicinity of the lower frame 423.

A waist fluid bag 437 constituting a waist brace 435 is attached at a position crossing the central portion 424b and the lower portion 424 c. By using the pressure receiving member 424 as the fixing member for the lumbar fluid bag 437 in this way, the number of parts can be reduced as compared with the case where a separate support member is provided, and the structure of the seat back frame 420 can be simplified.

The pressure receiving member 424 configured in the above manner is attached to the seat back frame 420 with the support wire 425 having elasticity. The pressure receiving member 424 fixed to the seat back frame 420 by the support wire 425 has flexibility and can receive a load from the back and waist of the occupant.

A side fluid bag 462 constituting a side brace 460 is attached to the back side frame 421 located on the left-right outer side of the lower portion 424c of the pressure receiving member 424.

Fig. 20 shows a section C-C of fig. 19. As shown in fig. 20, in the side brace 460, three side fluid bags 462 are mounted in a stacked state. Each side fluid bag 462 is inflated by injection of compressed air and deflated by discharge of compressed air. Each side fluid pocket 462 is laminated upon shrinkage.

Each of the side fluid bags 462 has a different size from each other. The side fluid bags 462 are disposed in different directions, and project so as to bulge in different directions by injecting compressed air. Thus, the side brace 460 can be deformed into an appropriate and flexible shape according to the body shape of the seated user, thereby laterally supporting the body of the seated user. Thus, the support of the seated user can be improved and the feeling of ease can be increased.

The side fluid bag 462 corresponds to a movable body and corresponds to a third movable body.

The ECU 450 of the fourth embodiment may also control the expansion/contraction of the shoulder fluid bag 432, the waist fluid bag 37, and the side fluid bag 462 based on the road surface condition, the steering angle of the steering wheel, the driving mode, and the rotation angle of the back plate. Thus, the occupant can be appropriately supported according to the body shape of the occupant and the running state of the vehicle.

< fifth embodiment >, a third embodiment

A vehicle seat according to a fifth embodiment will be described below with reference to fig. 21 and 22. In the embodiment described above, the shoulder fluid bag 32 and the lumbar fluid bag 37 are provided in the seat back frame. In contrast, the vehicle seat according to the fifth embodiment is provided with a thigh fluid bladder 540 in the seat cushion frame 510. The ECU of the vehicle seat of the fifth embodiment controls the expansion/contraction of the thigh fluid bag 540. Thus, the inhibition of thrombus (economy class syndrome) caused by deterioration of blood flow due to the sitting person maintaining the same posture for a long period of time is achieved without causing an obstacle to the pedal operation of the sitting person.

Basic structure of seat cushion frame

Fig. 21 is a perspective view of a seat cushion frame 510 of the fifth embodiment. The seat cushion frame 510 is responsible for functioning as a skeleton of a seat cushion (not shown). The seat cushion frame 510 is covered with a seat cushion pad (not shown) and a skin material (not shown).

As shown in fig. 21 and 22, the seat cushion frame 510 has a cushion side frame 511, a base frame 512, a front pipe 513, and a rear pipe 514 as main structures.

The cushion side frames 511 are disposed one on each of the left and right sides of the seat cushion frame 510. The cushion side frame 511 is a plate-like body extending in the front-rear direction.

The base frame 512 is connected to the left and right cushion side frames 511 via the front end sides of the left and right cushion side frames 511. The base frame 512 is a plate-like body extending in the left-right direction.

A left and right thigh fluid bag 540 is attached to the upper surface of the base frame 512. The thigh fluid bag 540 bulges and contracts by controlling the supply of compressed air. Therefore, the lower limb can be restrained from deteriorating by applying a stimulus to the back side of the thigh of the seated user.

The front pipe 513 is located rearward of the base frame 512 and connects the left and right cushion side frames 511.

The rear tube 514 is connected to the left and right cushion side frames 511 via rear end sides of the left and right cushion side frames 511.

The seat cushion frame 510 has a compression member 520 and left and right support members 530.

The pressure receiving member 520 is a member that receives the load of the seated person via the cushion S2 b. The pressure receiving member 520 is disposed between the left and right cushion side frames 511. The pressure receiving member 520 includes three steel wires 521 that are bridged between the front pipe 513 and the rear pipe 514, a front pressure receiving plate 522 that connects the steel wires 521, a central pressure receiving plate 523, and a rear pressure receiving plate 524. The front pressure receiving plate 522, the center pressure receiving plate 523, and the rear pressure receiving plate 524 are flexible resin members, but are not limited thereto. The front pressure receiving plate 522, the center pressure receiving plate 523, and the rear pressure receiving plate 524 may be elastic members including rubber or the like.

The steel wire 521 is installed between the front pipe 513 and the rear pipe 514 at both ends and the center in the left-right direction. The steel wire 521 supports a front pressure receiving plate 522, a central pressure receiving plate 523, and a rear pressure receiving plate 524.

The front pressure receiving plate 522 is positioned in front of the center pressure receiving plate 523 and the rear pressure receiving plate 524. The front pressure receiving plate 522 is supported by the steel wire 521 via a supported portion (not shown) formed on the lower surface. The supported portions are formed at both ends and the center in the left-right direction.

The front pressure receiving plate 522 is a plate-like body that supports the thigh of the seated user. The front pressure receiving plate 522 has flexibility to deform when receiving the load of the thigh.

The central pressure receiving plate 523 is located rearward at a predetermined interval from the front pressure receiving plate 522 and forward of the rear pressure receiving plate 524. The central pressure receiving plate 523 is supported by the steel wire 521 via a supported portion formed on the lower surface. The supported portions are formed at both ends and the center in the left-right direction. The central pressure receiving plate 523 is disposed substantially parallel to the horizontal plane.

The central pressure receiving plate 523 is a plate-like body that supports the thighs and buttocks of the seated user. The central pressure receiving plate 523 has flexibility to deform when receiving the load of the thigh and the hip.

The central pressure receiving plate 523 has a through hole 523b formed at a position corresponding to the ischials of the seated user. The left and right through holes 523b are arranged at intervals in the left and right direction. The through hole 523b suppresses the load concentration caused by the ischials of the seated user. In other words, by forming the through-hole 523b below the ischials of the seated user, the load due to the ischials can be dispersed toward the periphery of the through-hole 523b. This can improve the comfort of the seated user when sitting for a long time.

Four slits 523c extending in the left-right direction are formed at the edge of the through hole 523b. By forming the slit 523c at the edge of the through hole 523b, the central pressure receiving plate 523 can deform while following the shape of the buttocks of the seated user while ensuring the strength required to receive the load from the thighs of the seated user. Thus, improvement in the support of the seated user can be achieved.

The rear pressure receiving plate 524 is located rearward from the front pressure receiving plate 522 and the center pressure receiving plate 523 with a predetermined interval. The rear pressure receiving plate 524 is supported by the steel wire 521 via a supported portion (not shown) formed on the lower surface. The supported portions are formed at both ends and the center in the left-right direction.

The rear pressure receiving plate 524 is a plate-like body that supports the buttocks of the seated user. The rear pressure receiving plate 524 has flexibility to deform when receiving the load of the buttocks.

The rear pressure receiving plate 524 includes a plate-shaped main body portion 524b, an inclined portion 524c extending from the rear end of the main body portion 524b, and a plurality of ribs 524d provided in parallel in the left-right direction between the main body portion 524b and the inclined portion 524 c.

The body portion 524b has a through hole 524e formed at a position corresponding to the tailbone of the seated user. The through hole 524e is formed in the center of the main body 524b in the lateral direction. The through hole 524e has a substantially triangular shape, and has a size and shape corresponding to the direction and shape of the coccyx in the sitting state of the seated user. The through hole 524e prevents the phenomenon of load concentration by the tailbone of the seated user. In other words, by forming the through hole 524e below the tailbone of the seated user, the load by the tailbone can be dispersed toward the periphery of the through hole 524e. This can improve the comfort of the seated user when sitting for a long time.

The inclined portion 524c extends obliquely upward from the rear end of the main body portion 524 b. The inclined portion 524c is formed over the entire length of the rear pressure receiving plate 254 in the lateral direction. By the inclined portion 524c, the buttocks of the seated user can be more effectively supported.

The rib 524d is a plurality of plate-like bodies protruding upward from between the main body portion 524b and the inclined portion 524 c. The upper surface of the rib 524d has a curved surface where the front surface of the inclined portion 524c and the upper surface of the body portion 524b are connected in a smoothly continuous manner.

As described above, the front pressure receiving plate 522, the central pressure receiving plate 523, and the rear pressure receiving plate 524 are disposed at predetermined intervals in the front-rear direction. Thus, even when a large load is applied during sitting, the pressure receiving member 520 can deform with sufficient flexibility to receive the load of the sitting person. Even when a large load is received during sitting, the front pressure receiving plate 522, the center pressure receiving plate 523, and the rear pressure receiving plate 524 can be prevented from interfering with each other.

The support members 530 disposed on both sides in the seat width direction are members that support the occupant from both left and right sides. The support member 530 has a first portion 531, a second portion 532, a third portion 533, a fourth portion 534, and a connecting portion 535. In addition, the first portion 531, the second portion 532, the third portion 533, and the fourth portion 534 are integrally formed.

The first portion 531 is a portion that covers the inner side of the rear end portion of the cushion side frame 511. The first portion 531 has an abutting portion with the rear tube 514, and the rear tube 514 is connected to the rear ends of the left and right cushion side frames 511.

The second portion 532 is connected to the front side of the first portion 531. The second portion 532 is a portion covering an upper portion of a flange formed on the upper edge of the cushion side frame 511. The second portion 532 has a plate shape. The second portion 532 is coupled to the cushion side frame 511 by bolts, resin claws, clips, or the like.

The third portion 533 is connected to the front side of the first portion 531. The third portion 533 is connected to the inside of the second portion 532. The third portion 533 is a plate-like body having a side wall extending obliquely downward from the inside of the second portion 532. The third portion 533 is a portion that supports both side portions of the thigh from the buttocks of the seated user.

The fourth portion 534 is connected to the lower end side of the third portion 533. The fourth portion 534 is a plate-like body having an inclined wall formed to extend obliquely inward and downward in the left-right direction from the lower end of the third portion 533. The fourth portion 534 is a portion that supports both side portions of the thigh from the buttocks of the seated user together with the third portion 533.

The connection portions 535 are connection members disposed at three positions in the front-rear direction and engageable with the steel wires 521. The central pressure receiving plate 523 is supported by the two connecting portions 535 located at the front via the steel wire 521. One connecting portion 535 located at the rear supports the rear pressure receiving plate 524 via the steel wire 521. The connection portion 535 is attached to the lower end of the fourth portion 534. The connecting portion 535 supports the wire 521 by engaging with the wire 521 on the outer side in the lateral direction and above.

Next, the left and right thigh fluid bags 540 disposed on the upper surface of the base frame 512 will be described in detail, which are disposed on the front side of the seat cushion frame 510. The thigh fluid bag 540 is disposed at a position corresponding to the back of the knee or the inner side of the thigh of the seated user when the seated user sits.

The ECU 550 of the fifth embodiment controls to supply and discharge fluid to and from the left and right thigh fluid bags 540. This prevents the left and right thigh fluid bags 540 from collapsing, and can stimulate the thighs of the seated user. Therefore, the blood flow of the seated user who maintains the same posture for a long period of time can be improved, and the occurrence of economy class syndrome can be suppressed. The ECU 550 may determine that the seated user maintains the same posture for a long time based on the detection value of the weight sensor 40, and may control the thigh fluid bladder 540 to be prevented from collapsing based on the determination result. Thus, the occurrence of economy class syndrome can be more effectively suppressed.

The ECU 550 may also control the left and right thigh fluid bags 540 to alternately shrink at predetermined intervals. This can promote "leg lifting movement" for the seated user, that is, leg lifting when the thigh fluid bag 540 is inflated, and leg lowering when the thigh fluid bag 540 is contracted. Therefore, the occurrence of economy class syndrome can be more effectively suppressed.

The ECU 550 may limit the volume of fluid to be injected into the thigh fluid bladder 540 based on the detection values of the pressure sensor 43 and the bulge pressure sensor 44. This can suppress the occurrence of a situation where the thigh fluid bag 540 is excessively inflated, which may cause an obstacle to the operation of the accelerator, brake, or other driving pedal by the seated user.

The ECU 550 may control the volume of fluid injected into the thigh fluid bladder 540 based on the detected values of the vehicle speed sensor 41, the steering angle sensor 42, and the rotation angle sensor 45. Thus, appropriate expansion/contraction control according to the driving state of the vehicle can be performed, long-time driving of the seated user can be supported, and fatigue reduction can be achieved.

Furthermore, the ECU 550 may also control the volume of fluid injected into the thigh fluid bag 540 based on the driving mode of the vehicle. For example, in an automatic driving mode in which the user does not need to operate the driving pedal, the thigh fluid bag 540 is controlled to be inflated, thereby achieving fatigue relief for the user. When the automatic driving mode is released, the thigh fluid bag 540 is controlled to be contracted, and occurrence of a situation in which a pedal operation by the seated user is obstructed can be suppressed.

< sixth embodiment >

A vehicle seat according to a sixth embodiment will be described below with reference to fig. 23. In the fifth embodiment, the thigh fluid bladder 540 is disposed on the front side of the seat cushion frame 510 (the upper surface of the base frame 512) and is described. In contrast, the vehicle seat according to the sixth embodiment is provided with thigh fluid bags 640 on both sides in the left-right direction and on the rear side of the center in the front-rear direction of the seat cushion frame 610. Thus, the buttocks and thighs of the seated person can be properly supported from the side in accordance with the body shape of the seated person.

Fig. 23 is a top view of the seat cushion frame 610. The seat cushion frame 610 is responsible for functioning as a skeleton of a seat cushion (not shown). The seat cushion frame 610 is covered with a seat cushion pad (not shown) and a skin material (not shown).

The seat cushion frame 610 has cushion side frames 511, a base frame 512, a front pipe 513, and a rear pipe 514 as side frames. The seat cushion frame 610 further includes a pressure receiving member 520 and a support member 530 between the left and right cushion side frames 511.

The basic structure of the seat cushion frame 610 is the same as that of the fifth embodiment, and thus a detailed description thereof is omitted.

As shown in fig. 23, a vehicle seat according to the sixth embodiment is provided with a thigh fluid bag 640 at a position different from that of the fifth embodiment. In detail, the thigh fluid bags 640 are disposed on the rear side and on the left-right side of the center of the seat cushion frame 610 in the front-rear direction. The thigh fluid bag 640 is attached to the upper surface of the fourth portion 534 inside the third portion 533 of the support member 530 disposed right and left.

The ECU 650 controls to supply or discharge fluid to or from the left and right thigh fluid bags 640. Accordingly, the left and right thigh fluid bags 640 are prevented from collapsing (expanding or contracting), and support the buttocks and thigh of the seated user from below and from the side. In other words, by controlling the amount of compressed air supplied to the thigh fluid bag 640, the supporting force of the side portion of the pressure receiving member 520 can be adjusted. Therefore, the buttocks and the thighs of the user having different body shapes can be effectively supported from below and from the side, and the support performance of the user can be improved.

The ECU 650 may control the volume of fluid injected into the thigh fluid bag 640 based on the detection values of the vehicle speed sensor 41, the steering angle sensor 42, and the rotation angle sensor 45. Thus, appropriate expansion/contraction control according to the body shape of the occupant and the driving state of the vehicle can be performed, long-time driving of the occupant can be supported, and fatigue can be reduced.

< seventh embodiment >, a third embodiment

A vehicle seat according to a seventh embodiment will be described below with reference to fig. 24. In the sixth embodiment, thigh fluid bags 640 are mounted on the upper surfaces of the support members 530 disposed on the left and right sides of the seat cushion frame 610. In contrast, the vehicle seat according to the seventh embodiment is provided with a biasing member 740 that biases the support member 530 upward below the support member 530. At this time, the supporting force of the side portion of the pressure receiving member 520 can also be adjusted by the urging member 740. Further, the buttocks and thighs of the seated person can be appropriately supported from the side in accordance with the body shape of the seated person.

Fig. 24 shows a top view of a seat cushion frame 710 of the seventh embodiment. As shown in fig. 24, the biasing members 740 are disposed on the rear side and on the left-right side of the center of the seat cushion frame 710 in the front-rear direction. The biasing member 740 is disposed below the fourth portion 534 of the support member 530 disposed right and left. As described in further detail, the vehicle seat of the seventh embodiment includes a pair of right and left cushion side frames 511 and a pressure receiving member 520 disposed between the cushion side frames 511. The vehicle seat further includes support members 530 provided on both left and right sides of the pressure receiving member 520, and urging members 740 that urge the support members 530 upward.

The support member 530 is a resin member, and has flexibility that can be deformed by the urging member 740 located therebelow. The urging member 740 is an elastic member such as a spring. Above the biasing member 740, a support member 530, a seat cushion pad (not shown), and a skin material (not shown) are disposed.

Fig. 25 is a diagram schematically showing a state in which the urging member 740 urges the support member 530 upward. As shown in fig. 25, the urging member 740 is an elastic member including a torsion spring 741 disposed below the support member 530. The torsion spring 741 biases the fourth portion 534 of the support member 530 upward. Thus, the buttocks and thighs of the seated person can be properly supported from the side in accordance with the body shape of the seated person.

As shown in fig. 26, the urging member 740 may include: a support plate 742 fixed below the support member 730; and a thigh fluid bag 743 mounted on the upper surface of the support plate 742. The ECU750 of the seventh embodiment controls the left and right thigh fluid bags 743 to supply fluid to expand the thigh fluid bags 743, thereby allowing the thigh fluid bags 743 to function as the biasing members 740. In other words, by supplying a predetermined amount of fluid to the thigh fluid bag 743, the fourth portion 534 of the support member 530 is biased upward. Thus, the buttocks and thighs of the seated person can be properly supported from the side in accordance with the body shape of the seated person.

As shown in fig. 27, the urging member 740 includes: a support plate 742 fixed to extend in the left-right direction; and left and right elastic rotating bodies 744 mounted on the upper surface of the support plate 542 and having a cam shape. The elastic rotating body 744 is an elastic member including a rubber material.

The ECU750 of the seventh embodiment can cause the elastic rotating body 744 to function as the biasing member 740 by rotating the left and right elastic rotating bodies 744 with a motor (not shown). In other words, the elastic rotating body 744 can be rotated, and the support member 530 is biased upward by the protruding portion 744a of the elastic rotating body 744. Thus, the buttocks and thighs of the seated person can be properly supported from the side in accordance with the body shape of the seated person.

Variation of

In the fifth to seventh embodiments described above, the number of steel wires 521 supporting the pressure receiving member 520 has been described as three, but the present invention is not limited thereto. For example, the number of the steel wires 521 may be two or four or more.

The front end of the wire 521 is supported by the front pipe 513, but the present invention is not limited thereto. The steel wires 521 may also be mounted to the base frame 512.

< eighth embodiment >, a third embodiment

A vehicle seat according to an eighth embodiment will be described below with reference to fig. 28 to 30. In the fifth to seventh embodiments described above, the description has been made with the pressure receiving member 520 attached to a predetermined position. In contrast, the seat cushion frame 810 of the eighth embodiment has a length adjustment mechanism 820 that can adjust the length in the front-rear direction, and the pressure receiving member 520 is configured to be movable in the front-rear direction in conjunction with the length adjustment mechanism 820. Thus, the pressure receiving member 520 can be disposed at an appropriate position in accordance with the physical constitution of the seated user. Therefore, the load of the seated user can be appropriately supported in accordance with the physique of the seated user.

Basic structure of seat cushion frame

Fig. 28 is a perspective view of a seat cushion frame 810 of the eighth embodiment. The seat cushion frame 810 is responsible for acting as a skeleton of a seat cushion (not shown). The seat cushion frame 810 is covered with a seat cushion pad (not shown) and a skin material (not shown).

The seat cushion frame 810 mainly includes a cushion side frame 811 as a side frame, a fixed base frame 812, a movable base frame 813 movable in the front-rear direction, a front tube 814, and a rear tube 815. The seat cushion frame 810 includes a pressure receiving member 520 and a support member 530 between the left and right cushion side frames 811.

The fixed base frame 812 includes left and right side members 812a extending in the front-rear direction and a front beam 812b connecting the front ends of the side members 812 a. The right and left side members 812a and the front member 812b are formed by bending a metal plate. The front beam 812b has a plate-like portion 812c at the center in the lateral direction. The plate-like portion 812c has a predetermined width in the front-rear direction. A through hole (not shown) through which a fastening member 816 described later can be inserted is formed in the plate-like portion 812c.

The movable base frame 813 is slidably disposed in the front-rear direction with respect to the plate-like portion 812c of the front beam 812b. The movable base frame 813 has: an upper plate 813a mounted on the plate-like portion 812 c; and a front plate 813b extending downward from the front of the upper plate 813a and disposed in front of the front beam 812b.

The upper plate 813a has a plurality of elongated holes 813d formed therethrough in the thickness direction and extending in the front-rear direction. The elongated holes 813d are provided in two at the left and right sides. The fastening member 816 is inserted between the long hole 813d and the through hole formed in the plate-like portion 812c. The fastening member 816 is fixed to the through hole. The movable base frame 813 is guided by the long hole 813d so as to be slidable in the front-rear direction with respect to the fixed base frame 812.

A fixing portion 813e is formed at the rear of the upper plate 813a, and the fixing portion 813e fixes the front end of the steel wire 521 of the pressure receiving member 520. As described later, when the length adjustment mechanism 820 slides in the front-rear direction of the movable base frame 813, the wire 521 moves in the front-rear direction in conjunction with the movable base frame 813. With this, the front pressure receiving plate 522, the center pressure receiving plate 523, and the rear pressure receiving plate 524 of the pressure receiving member 520 are linked in the front-rear direction. The length adjustment mechanism 820 and the pressure receiving member 520 are linked as will be described later.

As shown in fig. 29, the stationary base frame 812 has a case 812k. The case 812k has a front wall 812e extending in the substantially vertical direction on the front side, a rear wall 812f opposite to the front wall 812e rearward of the front wall 812e, a side wall 812g connecting the front wall 812e and the rear wall 812f, and a bottom wall 812h.

The case 812k has a rear flange 812m fixed at the rear thereof with respect to the reinforcing portion 812l formed below the plate-like portion 812c, and a plurality of reinforcing ribs 812n connecting the rear wall 812f and the rear flange 812 m.

The pressure receiving plate 813c fixed to the movable base frame 813 is located between the front wall 812e and the rear wall 812 f. A first actuator 821 for driving the movable base frame 813 forward with respect to the fixed base frame 812 is disposed behind the pressure receiving plate 813 c. A second actuator 822 for driving the movable base frame 813 rearward with respect to the fixed base frame 812 is disposed in front of the pressure receiving plate 813 c.

The first actuator 821 biases the movable base frame 813 forward. The first actuator 821 has a plurality of first fluid bags 821a that are inflated by injecting compressed air and deflated by discharging the compressed air.

The second actuator 822 biases the movable base frame 813 rearward. The second actuator 822 has a plurality of second fluid bags 822a that are inflated by injecting compressed air and deflated by discharging the compressed air.

Length adjusting mechanism

Next, a length adjustment mechanism 820 for adjusting the length of the seat cushion according to the eighth embodiment in the front-rear direction will be described with reference to fig. 30. Fig. 30 shows a block diagram of the length adjustment mechanism 820. As shown in fig. 30, the length adjustment mechanism 820 has a first actuator 821, a second actuator 822, a compressor 823, and an ECU 850 as main configurations.

The ECU 850 takes charge of the control of the entire length adjustment mechanism 820. As will be described in detail, the ECU 850 controls the force applied by the first fluid bag 821a and the second fluid bag 822a by the injection and discharge of the compressed air. Compressed air is generated by the compressor 823. The first fluid bag 821a and the compressor 823 are connected to a first connection pipe 825 via a first control valve 824. The second fluid bag 822a and the compressor 823 are connected through a second connection pipe 827 via a second control valve 826. The ECU 850 controls the opening and closing of the first control valve 824 and the second control valve 826 to inject or discharge the compressed air generated by the compressor 823 into or from the first fluid bag 821a and the second fluid bag 822 a. The operation switch 828 has an extension button and a contraction button, and outputs an output signal corresponding to the operation of the extension button and the contraction button to the ECU 850.

The ECU 850 controls expansion and contraction of the first fluid bag 821a and the second fluid bag 822a based on the output signal of the operation switch 828, and moves the movable base frame 813 in the front-rear direction. Thus, the seat cushion can be expanded and contracted to an appropriate length corresponding to the shape of the seated user. Then, with the movement of the movable base frame 813, the front pressure receiving plate 522, the central pressure receiving plate 523, and the rear pressure receiving plate 524 of the pressure receiving member 520 move in the front-rear direction. Therefore, the front pressure receiving plate 522, the center pressure receiving plate 523, and the rear pressure receiving plate 524 can be arranged at appropriate positions according to the physique of the seated user.

At this time, a stretchable elastic member may be interposed between the connecting portion 535 and the fourth portion 534. Thus, even when the pressure receiving member 520 is moved in the front-rear direction by the length adjustment mechanism 820, the pressure receiving member 520 can be appropriately supported by the support member 530. The connection portion 535 itself may be formed of an elastic member having stretchability.

Variation of

In the eighth embodiment, the pressure receiving member 520 is supported by the steel wire 521 provided between the movable base frame 813 and the rear pipe 514, but the present invention is not limited thereto. The pressure receiving member 520 may be supported by a stretchable and long elastic member. An elastic member having stretchability may be interposed between the movable base frame 813 and the rear tube 514 to support the pressure receiving member 520 and be coupled to the rear tube 514. Accordingly, the pressure receiving performance of the pressure receiving member 520 can be adjusted in a state in which the movable base frame 813 is moved forward by the length adjustment mechanism 820.

< ninth embodiment >

Next, a vehicle seat S901 according to a ninth embodiment will be described with reference to fig. 31 and 32.

Conventionally, there is known a vehicle seat including a ventilation passage and a blower inside the seat, and capable of guiding air sent from the blower to a seating surface for blowing to a seated person.

Patent literature (japanese patent application laid-open No. 2020-110702) discloses a vehicle seat in which an air passage is formed in a cushion.

Further improvement is desired in the vehicle seat in which the ventilation passage is formed in the cushion as described above. That is, there is a demand for a vehicle seat capable of improving comfort by blowing air of an appropriate temperature from a sitting surface to a sitting person and capable of reducing fatigue of the sitting person.

The vehicle seat S901 has a ventilation path 941 formed in the seat cushion S911 and the seat back S912, and the ventilation path 941 transmits the air-conditioned air transmitted from the blower to the seating surface of the vehicle seat S901. The vehicle seat S901 further includes a fluid bag 960 disposed between the cushion and the skin, and the fluid bag 960 is inflatable and contractible by compressed air. The ventilation channel 941 and the fluid bag 960 are disposed at positions not overlapping each other when viewed from the sitting surface. This can suppress interference or influence of the ventilation channel 941 and the fluid bag 960.

Basic structure of vehicle seat

Fig. 31 is a perspective view showing a basic structure of the vehicle seat S901. As shown in fig. 31, the vehicle seat S901 has a seat cushion S911, a seat back S912, and a headrest S913 as main configurations.

The seat cushion S911 mainly includes a seat cushion frame (not shown) that forms a skeleton of the seat cushion S911, and a cushion 911 and a skin 930 that cover the seat cushion frame.

The seat back S912 mainly includes a seat back frame (not shown) that forms a skeleton of the seat back S912, and a cushion (not shown) and a skin (not shown) that cover the seat back frame.

The cushion 911 of the seat cushion S911 has a ventilation path 941 through which air-conditioned air output from an air conditioner (not shown) passes. The ventilation path 941 has an inlet 942 into which air-conditioning air output from the air conditioner flows, and a plurality of outlets 943 through which the air-conditioning air is blown out from below to a seated user. The inflow opening 942 is formed at the center and the rear side in the lateral direction of the seat cushion S91. The air outlet 943 is formed in four positions on the left and right sides on the front side of the inlet 942. The arrangement of the ventilation passage 941, the inflow port 942, and the blow-out port 943 is not limited to the arrangement illustrated in fig. 31. The user's comfort can be improved by delivering the air-conditioning air output from the air-conditioning device to the user.

A seat sensor 945 for detecting that a seated user has been seated on the vehicle seat S901 is incorporated between the cushion 911 of the seat cushion S911 and the cover 930. The sitting sensor 945 is a sensor that can detect that a seated user has been sitting, such as a weight sensor.

Further, a control circuit 946 that is responsible for controlling electric components (various sensors and actuators) disposed in the vehicle seat S901 is disposed in the seat cushion S911. The seating sensor 945 is electrically connected to the control circuit 946 via a harness 947. In other words, the detection signal of the sitting sensor 945 is output to the control circuit 946 via the wire harness 947.

A plurality of fluid bags 960 are disposed between the pad 911 and the skin 930, and the plurality of fluid bags 960 are inflated by injecting compressed air and deflated by discharging the compressed air. Fluid bag 960 primarily contains thigh fluid bag 960a, waist fluid bag 960b, and side fluid bag 960c. Thigh fluid bag 960a is built into seat cushion S911 and primarily supports the thigh of the seated user. The lumbar fluid bag 960b is built into the seat back S912, primarily supporting the lumbar of the seated user. The side fluid bag 960c is built in the seat back S92, supporting mainly the body of the seated user from the side.

As shown in fig. 31, the fluid bag 960 is disposed in a position not overlapping with the ventilation path 941 when viewed from the sitting surface. This can suppress a phenomenon in which the flow of the air-conditioning air passing through the ventilation passage 941 is blocked when the fluid bag 960 is inflated. When the fluid bag 960 is inflated, it does not descend downward but protrudes upward, so that the user can be effectively stimulated.

The fluid bag 960 is disposed at a position overlapping with the seating sensor 945 when viewed from the seating surface. Thus, the sit sensor 945 detects the pressure generated when the fluid bag 960 bulges, in addition to the load of the occupant. Therefore, the omission of detection of the seated person by the seating sensor 945 can be suppressed.

The fluid bag 960 is disposed at a position not overlapping the wire harness 947 when viewed from the sitting surface, and the wire harness 947 electrically connects the sitting sensor 945 and the control circuit 946. This can prevent the wire harness 947 from being damaged by the load applied when the seated user sits on and the pressure generated when the fluid bag 960 is inflated.

Fig. 32 shows an exploded perspective view of the cushion 911 of the seat cushion S911. As shown in fig. 32, the pad 911 has a pad body 912, a first cover member 920, and a second cover member 921 as main structures. The pad body 912, the first cover member 920, and the second cover member 921 are formed of urethane foam. The pad 911 is used in a state where the first cover member 920 and the second cover member 921 are placed on the pad body 912 and stacked.

The pad body 912 has a central portion 912a, and side portions 912b are integrally formed on both left and right sides of the central portion 912 a. A cover mounting portion 912c, in which the first cover member 920 and the second cover member 921 are mounted, and an inflow port 942 into which the air-conditioned air flows, are formed in the center portion 912 a.

First engaging portions 912d are formed on left and right side surfaces of the cover mounting portion 912c, and the first engaging portions 912d are engaged with engaged portions 920a formed in a first cover member 920 described later. A second engaging portion 912e is formed in front of the cover mounting portion 912c, and the second engaging portion 912e engages with an engaged portion 921a formed in the second cover member 921, which will be described later.

The first cover member 920 and the second cover member 921 are members that form a ventilation passage 941 with the gasket body 912 by being placed on the upper surface of the cover attachment portion 912c of the gasket body 912.

The first cover member 920 is a plate-shaped member. The first cover member 920 has a vent hole 920b formed therein. The vent hole 920b forms a vent passage 941 between the upper surface of the gasket body 912 and the second cover member 921. To be described in detail, the conditioned air flowing in from the inflow port 942 formed in the pad body 912 passes through the ventilation hole 920b and is blown out from the blow-out port 943 formed in the second cover member 921 described later. As described above, the vent hole 920b is formed at a position that does not coincide with the fluid bag 960 when viewed from the sitting surface. Thereby, the fluid bag 960 disposed on the pad 911 can be inflated and deflated without being affected by the ventilation channel 941.

The first cover member 920 has left and right side surfaces provided with engaged portions 920a that engage with the first engaging portions 912d of the pad body 912.

The second cover member 921 is a plate-like member. Four air outlets 943 are formed in the left and right sides of the second cover member 921. The air outlet 943 is formed at a position not overlapping with the fluid bag 960 when viewed from the sitting surface. In detail, as shown in fig. 31, the air outlet 943 is formed so as to be located between the plurality of fluid bags 960. The blowout port 943 is formed so as to be positioned forward of the fluid bag 960. This can suppress the phenomenon that the flow of the air-conditioned air blown out from the air outlet 943 is blocked by the fluid bag 960 disposed on the pad 911.

A seating sensor mounting portion 921b for mounting the seating sensor 945 is formed at the rear of the second cover member 921. The sitting sensor mount 921b is formed at a position overlapping with the fluid bag 960 when viewed from the sitting surface. Thus, the load applied when the seated user sits can be reliably detected by the sitting sensor 945.

An engaged portion 921a that engages with the second engaging portion 912e of the pad body 912 is formed in front of the second cover member 921.

In assembling the gasket 911 configured as described above, first, an adhesive is applied to the upper surface of the gasket body 912 and the upper surface of the cover mounting portion 912c. Next, the first cover member 920 is overlapped with the cover mounting portion 912c while the first engaging portion 912d of the pad body 912 is engaged with the engaged portion 920a of the first cover member 920. The first cover member 920 is secured to the gasket body 912 by an adhesive.

Then, an adhesive is coated on the upper surface of the first cover member 920. Next, the second cover member 921 is overlapped with the first cover member 920 while the second engagement portion 912e of the pad body 912 is engaged with the engaged portion 921a of the second cover member 921. The second cover member 921 is secured to the first cover member 920 and the gasket body 912 by an adhesive.

Through the above operation, the assembly of the gasket 911 is completed. Also, it is possible to guide the air-conditioned air to the seating surface without having to install a ventilation pipe for passing the air-conditioned air inside the pad 911. Therefore, when a seated user sits, the user does not feel uncomfortable due to the presence of the ventilation pipe, and can sit comfortably.

The cushion 911 of the seat cushion S911 has been described above, but is not limited thereto. The present invention can be applied to, for example, a cushion 911 of a seat back S912. At this time, the first cover member 920 and the second cover member 921 are disposed to overlap the front surface (the sitting person side surface) of the cushion 912 body.

< tenth embodiment >

Next, a vehicle seat S1001 according to a tenth embodiment will be described with reference to fig. 33 to 39.

Conventionally, there is known a vehicle seat including an airbag device, which is operated when a collision of a vehicle is detected, thereby improving safety of a seated user.

Patent literature (japanese patent application laid-open No. 2020-050269) discloses a vehicle seat in which, when a collision of a vehicle is detected, a portion of an airbag main body located below a knee back of a seated user is inflated first, whereby movement of a waist of the seated user toward the front (submarining) can be suppressed.

However, regarding a vehicle seat including an airbag device, further improvement for realizing safety assurance of an occupant when a collision is detected is desired. Specifically, there is a demand for a vehicle seat that can suppress the potential slip phenomenon by expanding a fluid bag disposed in the vehicle seat at a stage before a collision is detected, that is, at a stage in which a collision is expected.

The vehicle seat S1001 includes: a collision predicting unit 1052a that predicts a collision of the vehicle; and a collision determination unit 1052b that determines a collision of the vehicle. The vehicle seat S1001 includes a fluid bag 1060 that expands and contracts by injecting and discharging fluid, and an airbag device 1070. The ECU 1050 of the vehicle seat S1001 controls the fluid bag 1060 to expand/contract based on the prediction result of the collision predicting unit 1052a, and operates the airbag device 1070 based on the determination result of the collision determining unit 1052 b. In this way, the collision is predicted by the collision predicting unit 1052a before the operation of the airbag device 1070, so that the occupant can be properly protected, and the safety of the occupant can be improved.

Basic structure of vehicle seat

Fig. 33 is a perspective view showing a basic structure of the vehicle seat S1001. As shown in fig. 33, the vehicle seat S1001 has a seat cushion S1011, a seat back S1012, and a headrest S1013 as main configurations.

The seat cushion S1011 mainly includes a seat cushion frame 1010 constituting a framework thereof, and a seat cushion pad S1011a and a skin material S1011b covering the seat cushion frame 1010.

The seatback S1012 mainly includes a seatback frame (not shown) constituting a skeleton thereof, a seatback pad (not shown) covering the seatback frame, and a skin material (not shown).

The vehicle seat S1001 incorporates a plurality of fluid bags 1060. The fluid bag 1060 expands by injecting fluid and contracts by discharging fluid.

The fluid bag 1060 mainly includes: a buttock fluid bag 1061 that mainly supports buttocks of a seated user, a thigh fluid bag 1062 that mainly supports thighs, a waist fluid bag 1063 that mainly supports a waist, and a side fluid bag 1064 that laterally supports a body.

Fig. 34 is a partial cross-sectional view of the vehicle seat S1001. As shown in fig. 34, the seat cushion S1011 incorporates an airbag device 1070. The airbag device 1070 inflates to protect a seated user when the vehicle receives an impact from the front due to a frontal collision or the like. The airbag device 1070 includes an airbag main body 1071, an inner bag 1072 housed in the airbag main body 1071, and a gas generating device 1073 housed in the inner bag 1072 and configured to supply inflation gas. The operation of the airbag device 1070 will be described later.

Functional structure of ECU

Fig. 35 is a block diagram showing a functional configuration of the ECU 1050. The ECU 1050 communicates with various sensors provided in the vehicle through an in-vehicle network, thereby acquiring detection values of the various sensors. The various sensors include the weight sensor 40, a vehicle speed sensor 41, a steering angle sensor 42, a pressure sensor 43, a bulge pressure sensor 44, and a rotation angle sensor 45. The ECU 1050 in the present embodiment may further acquire the detection values of the outside sensor 1046 and the collision sensor 1047.

The outside sensor 1046 is a sensor that detects outside conditions, which are information on the surroundings of the vehicle. Specifically, the external sensor 1046 may include a radar that measures scattered light of omnidirectional irradiation light with respect to the vehicle to measure a distance from the surrounding obstacle to the vehicle. Further, the external sensor 1046 may include a radar that detects other vehicles or obstacles around the vehicle by irradiating electromagnetic waves and detecting reflected waves. The ambient sensor 1046 may further comprise an optical sensor for capturing an image of the vehicle surroundings.

The collision sensor 1047 is a sensor that detects a collision of the vehicle. Specifically, the collision sensor 1047 is an acceleration sensor mounted in front of, behind, and to the side of the vehicle.

The ECU 1050 includes an acquisition unit 1051, a determination unit 1052, and a drive unit 1053. As described above, the acquisition unit 1051 acquires the detection values of the various sensors.

The determination unit 1052 includes a collision prediction unit 1052a and a collision determination unit 1052b.

The collision predicting section 1052a detects an object around the vehicle based on the detection value of the outside sensor 1046. The collision predicting unit 1052a determines the type of the object (e.g., a pedestrian or other vehicle) based on the detected characteristics of the object. Then, the collision predicting unit 1052a calculates the collision probability between the detected object and the vehicle. The collision probability is calculated in consideration of the approaching speed of the stage to the vehicle. The collision predicting unit 1052a may determine a collision pattern (front collision, rear collision, side collision) of the vehicle with the object, and calculate a collision probability at the time of a specific collision (for example, front collision).

The collision predicting unit 1052a compares the calculated collision probability with a predetermined threshold value, and outputs the collision predicting result to the driving unit 1053. The collision prediction result contains information that can determine the collision morphology.

The collision determination unit 1052b acquires acceleration signals, which are detected values of collision sensors 1047 mounted in front of, behind, and to the side of the vehicle. The collision determination unit 1052b compares the acceleration signal with a predetermined threshold value, and outputs the collision determination result to the driving unit 1053. The collision determination result contains information that can determine the collision morphology.

When the collision prediction result is input from the collision prediction unit 1052a, the driving unit 1053 controls the opening and closing degree of the solenoid valve 56, thereby expanding and contracting the fluid bag 1060.

When a collision prediction result indicating a frontal collision is input from the collision prediction unit 1052a, the driving unit 1053 contracts the hip fluid bag 1061 incorporated in the seat cushion S1011 and expands the thigh fluid bag 1062, as shown in fig. 36. Thus, the seat cushion S101 protrudes upward from the front, and is relatively higher than the rear. Therefore, the phenomenon (the submarine phenomenon) in which the seated person moves forward in a state of being lifted from the seat cushion S1011 can be suppressed.

The description has been made of the case where the driving unit 1053 contracts the hip fluid bag 1061 and expands the thigh fluid bag 1062, but the present invention is not limited thereto. That is, only one of the control for contracting the hip fluid bag 1061 and the control for expanding the thigh fluid bag 1062 may be performed.

When a collision prediction result indicating a rear collision is input from the collision predicting unit 1052a, the driving unit 1053 inflates the lumbar fluid bag 1063 that is built in the seatback S1102. Thus, the waist fluid bag 1063 is inflated before the occurrence of the rear collision, and therefore, the safety against the impact at the time of the rear collision can be improved.

The driving unit 1053 does not inflate the side fluid bag 1064 incorporated in the seatback portion S102 when the collision prediction result indicating the side collision is input from the collision predicting unit 1052 a. This can protect the occupant from impact injury by the airbag device (not shown) disposed on the side of the occupant, without interference by the side fluid bag 1064.

Further, when a side collision is predicted, the support plate of the side support portion S1012a built in the seat back S1012 may be displaced to the retracted position.

The support plate biases the seat back pad forward from the back surface of the seat back pad in a normal state. When a signal for predicting a side collision is input, the driving unit 1053 controls the support plate to retract to a rear position by an actuator (not shown). This can protect the occupant from impact injury by the airbag device (not shown) disposed on the side of the occupant, without interference from the support plate.

When a collision determination result indicating a frontal collision is input from the collision determination unit 1052b, the driving unit 1053 operates the airbag device 1070 incorporated in the seat cushion S1011, as shown in fig. 37.

Here, the operation of the airbag device 1070 when inflated will be described in further detail. As shown in fig. 38, an inner bag 1072 is housed inside an airbag body 1071 of the airbag device 1070, and a gas generating device 1073 is housed inside the inner bag 1072.

When the vehicle collides with the front and the driving unit 1053 operates the airbag device 1070, the gas generating device 1073 generates high-pressure gas for inflation. Accordingly, the inner bag 1072 housing the gas generating device 1073 is inflated. The inner bag 1072 has a discharge hole 1072a for discharging high-pressure gas. Accordingly, the front portion 1071a of the airbag body 1071 is inflated by the high pressure gas discharged from the discharge hole 1072a of the inner bag 1072. On the other hand, the rear portion 1071b of the airbag main body 1071 maintains a contracted state due to the load of the occupant. The drain 1072a is located forward of the thigh of the seated user to the periphery of the back of the knee. Therefore, at the time of a frontal collision of the vehicle, the occurrence of a phenomenon (a potential slip phenomenon) in which the occupant moves forward in a state of being lifted from the seat cushion S1011 can be suppressed.

The operation of the driving unit 1053 when the collision prediction result and the collision determination result are input is not limited to the above operation. For example, the driving unit 1053 may retract the support plate incorporated in the side support portion S1012a when the side collision result is input from the collision determination unit 1052 b.

Process flow of ECU 1050

Next, the operation of the ECU 1050 will be described.

Fig. 38 is a flowchart showing an example of processing executed by the ECU 1050 according to a program stored in advance. The flowchart is repeated periodically at regular intervals.

Initially, the ECU 1050 acquires output signals of various sensors provided to the vehicle (step S10).

Next, the ECU 1050 determines whether the acceleration signal detected by the collision sensor 1047 is greater than a predetermined prescribed threshold TH1 (step S11). Here, the ECU 1050 compares the acquired acceleration signal with the threshold TH1 of the frontal collision, but the same applies to the rear collision and the side collision.

If it is determined that the acceleration signal is not greater than the threshold TH1 (no in step S11), the ECU 1050 calculates a collision probability based on the ambient signal detected by the ambient sensor 1046 (step S12). ECU 1050 calculates a collision probability of a frontal collision based on the acquired external signal.

Then, the ECU 1050 determines whether the collision probability is greater than a predetermined prescribed threshold TH2 (step S13). ECU 1050 compares with threshold TH2 for a frontal collision.

If it is determined that the collision probability is greater than the threshold value TH2 (yes in step S13), the ECU 1050 controls the thigh fluid bag 1062 to be inflated (step S14). At this time, the buttocks fluid bag 1061 may also be controlled to be contracted. Thus, the seat cushion S101 protrudes upward from the front and is relatively higher than the rear.

On the other hand, if it is not determined that the collision probability is greater than the threshold TH2 (no in step S13), the ECU 1050 controls the thigh fluid bag 1062 to contract (step S15), and ends the process.

If it is determined that the acceleration signal is greater than the threshold TH1 (yes in step S11), the ECU 1050 operates the airbag device 1070 incorporated in the seat cushion S101 (step S16), and the process ends.

In this way, before the actual collision of the vehicle, the ECU 1050 controls the thigh fluid bag 1062 to expand so that the front of the seat cushion S101 protrudes upward at the time when the collision is predicted. Thus, the occurrence of the submarine phenomenon can be more effectively suppressed.

< eleventh embodiment >

The vehicle seat S1101 according to the eleventh embodiment is described below with reference to fig. 39 and 40.

Conventionally, quilting (quing) has been performed on a skin material of a vehicle seat for the purpose of improving the design of the vehicle seat.

Patent document (japanese patent application laid-open No. 2015-143067) discloses a vehicle seat that includes a fabric including a heat shrinkable material and has improved design by performing quilting.

However, with respect to a vehicle seat in which quilting is performed, further improvement is desired. Specifically, there is a demand for a vehicle seat in which a fluid bag that can be inflated and deflated by supplying a fluid is disposed between a skin material and a cushion, and by this, the concave-convex shape formed by quilting is made apparent, and further improvement in design can be achieved.

The vehicle seat S1101 has a quilted pattern 1131 having a concave-convex shape formed in the cover material 1130. Further, an expandable/contractible fluid bag 1140 is disposed inside the skin material 1130 at a position not overlapping with the concave portion 1133 of the quilted pattern 1131 when viewed from the sitting surface. Thus, when the fluid bag 1140 is inflated, the convex portions 1132 of the quilted pattern 1131 can be made apparent while maintaining the regularity of the concave-convex shape of the quilted pattern 1131. Further, the phenomenon that the decorative property of the quilted pattern 1131 is lowered due to the expansion of the fluid bag 1040 can be suppressed.

Basic structure of vehicle seat

Fig. 39 is a perspective view showing a basic structure of the vehicle seat S1101. As shown in fig. 39, the vehicle seat S1101 has a seat cushion S1111, a seat back S1112, and a headrest S1113 as main configurations.

The seat cushion S1111 mainly includes a seat cushion frame (not shown) constituting a skeleton of the seat cushion S1111, a cushion (not shown) covering the seat cushion frame, and a skin material (not shown).

The seat back S1112 mainly includes a seat back frame (not shown) that forms a skeleton of the seat back S1112, a pad 1120 (see fig. 40) that covers the seat back frame, and a skin 1130.

The cover material 1130 of the seat cushion S1111 and the seat back S1112 is formed with a quilted pattern 1131. The quilted pattern 1131 has convex portions 1132 and concave portions 1133. The convex portions 1132 and the concave portions 1133 are regularly arranged in a grid shape. The quilted pattern 1131 may be formed by a known quilting process including a step of sewing the skin material 1130 including the laminate. By quilting the cover 1130, the cushioning property and the decorative property of the vehicle seat S1101 can be improved.

Between the pad 1120 and the skin 1130, a plurality of fluid pockets 1140 are disposed, and the plurality of fluid pockets 1140 are inflated by the injected fluid and deflated by the discharged fluid. In the present embodiment, the fluid is compressed air, but is not limited thereto. The fluid may also be a liquid. In other words, the plurality of fluid bags 1140 may be any one of a compressed air bag inflated by compressed air and a fluid bag inflated by a fluid, or may be a combination of a compressed air bag and a fluid bag. By combining the compressed air bag with the liquid bag having lower elasticity than the compressed air, the elasticity or rigidity of the fluid bag 1140 can be appropriately adjusted.

As shown in fig. 39, the fluid bag 1140 is disposed at a position not overlapping with the concave portion 1133 of the quilted pattern 1131 when viewed from the sitting surface. In other words, the fluid bag 1140 is disposed at a position overlapping with the convex portion 1132 of the quilted pattern 1131. As a result, the skin material 1130 deforms due to the expansion of the fluid bladder 1140, and the phenomenon of deformation of the regular concave-convex shape of the quilted pattern 1131 is suppressed. Accordingly, the decorative properties of the quilted pattern 1131 formed on the skin material 1130 of the vehicle seat S1101 can be maintained.

Fig. 40 shows a partial sectional view of the seat back S1112. As shown in fig. 40, the fluid bladder 1140 between the pad 1120 and the skin 1130 has at least a first fluid bladder 1141 disposed on the rear side (pad 1120 side) and a second fluid bladder 1142 disposed on the front side (skin 1130 side). The first fluid pouch 1141 is laminated with the second fluid pouch 1142.

The first fluid bag 1141 has a larger capacity than the second fluid bag 1142. The area of the first fluid bladder 1141 in contact with the pad 1120 is larger than the area of the second fluid bladder 1142 in contact with the skin 1030. Further, the first fluid bag 1141 has higher rigidity than the second fluid bag 1142. As described above, when the first fluid bag 1141 and the second fluid bag 1142 are inflated, the first fluid bag 1141 and the second fluid bag 1142 can be prevented from being displaced toward the pad 1120, and the first fluid bag 1141 can function as a base material to support the second fluid bag 1142. Thus, by the second fluid bag 1142 protruding, the user can be effectively given stimulus.

The first fluid bag 1141 and the second fluid bag 1142 can be fixed in a stacked state by welding to each other. Thus, the first fluid bag 1141 can more firmly support the second fluid bag 1142. Alternatively, the first fluid bag 1141 and the second fluid bag 1142 may be bonded and fixed by using an adhesive.

< twelfth embodiment >

A vehicle seat S1201 according to a twelfth embodiment is described below with reference to fig. 41 to 46.

There is known a vehicle seat in which a sensor member is disposed at a seat portion as a technique of detecting a state in which a seated person is sitting in the vehicle seat S1201 or detecting biological information of the seated person.

In patent literature (japanese patent laid-open publication No. 2013-095373), a technique is disclosed: the conductive portion (harness) of the seat sensor is routed through a hole penetrating the pad member, and the connector portion (coupler) is disposed on the back surface of the pad member.

In this way, if the connector portion (coupler) is disposed on the back surface of the pad member in a thin manner, the sitting feel may be deteriorated when the connector portion is disposed below the sitting portion. Further, depending on the layout form of the conductive portion, there is a possibility that the feeling of sitting is deteriorated due to the excessive expansion of the conductive portion.

Therefore, in the case where the sensor member is disposed, the vehicle seat S1201 is provided with a conductive portion such as a harness or a connector such as a coupler, so that the sitting feeling is improved.

The vehicle seat S1201 has the appearance illustrated in fig. 41. The vehicle seat S1201 has, as main constituent members, the following portions: a seat cushion S1211 that becomes a buttock support portion (sitting portion) that supports buttocks of a seated user, and a seat back S1212 that becomes a backrest portion (sitting portion) that supports a back of the seated user; and a headrest S1213 disposed on the upper portion of the seat back S1212 and supporting the head of the seated user.

The seat cushion S1211 (sitting portion) of the present embodiment has a seat cushion pad 1210 (pad member), a sensor member 1220, and a trim cover 1230 (skin material).

The seat cushion S1211 is configured by placing a seat cushion pad 1210 on a vehicle body (support portion) not shown, and further covering the seat cushion pad 1210 with a trim cover 1230. The seat back S122 is formed by placing a seat back cushion (not shown) on a seat back frame (not shown) and covering the seat back cushion with a trim cover 1230. The headrest S123 is formed by disposing a cushion member (not shown) on a core material and covering the core material with a decorative cover 1230.

The seat cushion pad 1210 of the seat cushion S121 or the seat back pad of the seat back S122 is a urethane base material molded by foam molding using a urethane foam material.

Seat cushion according to the present embodiment

The structure of the seat cushion S1211 of the vehicle seat S1201 will be described with reference to fig. 42 to 44. Fig. 42 is a section A-A of fig. 41. FIG. 43 is a cross-sectional view A-A of FIG. 41 and is a diagram illustrating an example in which the recess 1212b of the seat cushion pad 1210 includes a protrusion 1212 c. Fig. 44 is a view showing the connector 1223 accommodated in the concave portion 1212b of the seat cushion pad 1210. In fig. 44, the illustration of the decorative cover 1230 is omitted.

Seat cushion pad 1210

As shown in fig. 41 and 42, the seat cushion pad 1210 includes a front surface 1210a disposed on the seating surface side (upper side) and a rear surface 1210b disposed on the rear surface side (lower side) in the up-down direction. The seat cushion pad 1210 includes a front end portion 1211 (first end portion) disposed on the front side and a rear end portion 1212 (second end portion) disposed on the lower side in the front-rear direction. Further, the seat cushion pad 1210 includes side end portions 1213 disposed on both side portions in the seat width direction.

As shown in fig. 42, the seat cushion pad 1210 includes a through hole 1214 formed through from the front surface 1210a (seating surface side) to the rear surface 1210b (rear surface side), and a concave portion 1212b formed at the rear end 1212 (end). At the rear end 1212 (end portion) of the seat cushion pad 1210, a bulge portion 1212a (pillow portion) bulging upward (seat surface side) is formed, and a recess 1212b is provided in the bulge portion 1212a. The concave portion 1212b is formed below the bulge portion 1212a so as to be recessed forward from the rear end portion 1212 (end portion).

Sensor structure 1220

The sensor member 1220 includes a detection unit 1221 that detects the state of the occupant, an external output unit 1222 that outputs a signal detected by the detection unit 1221, a connector 1223 (coupler) connected to the external output unit 1222, and a conduction unit 1224 (harness) as a wiring member that conducts between the detection unit 1221 and the external output unit 1222 (fig. 42).

The sensor member 1220 is not particularly limited as long as it can detect the state of the seated user, and examples thereof include a diaphragm Guan Dengya sensor, an electrode sensor for measuring impedance fluctuation, a pressure sensor including a piezoelectric element, an air tube sensor for measuring air pressure, a capacitance sensor for measuring change in capacitance, an optical sensor for measuring light absorption rate fluctuation due to hemoglobin (hemoglobin) concentration, a radio wave sensor, and the like.

The state of the sitting person detected by the sensor member 1220 is not particularly limited, and examples thereof include presence or absence of sitting of the sitting person, sitting state, state of heartbeat, state of respiration, and value of biological information such as blood flow and hemoglobin concentration. That is, the sensor member 1220 is appropriately selected according to the detected state of the seated user.

In the case where the sensor member 1220 is a seating sensor, a membrane switch may be used as the detecting portion 1221. As the sensor member 1220, a variety of conventionally known sensors such as a pressure-sensitive film sensor that configures a plurality of pressure-sensitive points and detects whether or not the seated user is sitting based on the output distribution thereof can be used.

The detection unit 1221 and the external output unit 1222 are electrically connected by a conduction unit 1224. The external output unit 1222 outputs the signal detected by the detection unit 1221, and an output electrode is formed. The external output unit 1222 is connected to a connector 1223, which is connected to an electronic control unit (Electronic Control Unit, ECU) including an electronic circuit (not shown) for measuring the state of the occupant.

Configuration of sensor element 1220

As shown in fig. 42, a detection portion 1221 is disposed on the surface 1210a side (seating surface side) of the seat cushion pad 1210. The conduction portion 1224 extending rearward from the detection portion 1221 is inserted through the through hole 1214 of the seat cushion pad 1210 and bent downward at the first bending portion 1224 a. The conductive portion 1224 that is inserted through the through hole 1214 to reach the rear surface 1210b of the seat cushion pad 1210 extends in a curved manner rearward at the second curved portion 1224 b.

Further, a connector 1223 is accommodated in the recess 1212b on the rear surface 1210b side of the seat cushion pad 1210. Also, the trim cover 1230 covers the surface 1210a side (seating surface side) of the seat cushion pad 1210 and the concave portion 1212b.

In other words, the connector 1223 is supported by being sandwiched between the recess 1212b of the seat cushion pad 1210 and the trim cover 1230. The connector 1223 is not fixed by using a bracket for attachment, but is sandwiched between the concave portion 1212b and the decorative cover 1230, and the connector 1223 can be appropriately fixed with a simple structure.

The conductive portion 1224 (harness) of the sensor member 1220 is also covered by the trim cover 1230 on the front surface 1210a and the rear surface 1210b of the seat cushion pad 1210, and the fixation to the seat cushion pad 1210 becomes stable. In particular, regarding the conductive portion 1224, the portion bent in the second bent portion 1224b and extending rearward from the through hole 1214 is sandwiched between the rear surface 1210b of the seat cushion pad 1210 and the trim cover 1230, and the conductive portion 1224 is prevented from being excessively expanded.

In the vehicle seat S1201 of the present embodiment, the through hole 1214 and the connector 1223 are provided in the seat cushion S1211 rearward of a portion (hip point) on which the sitting load acts.

Specifically, in the vehicle seat S1201, the recess 1212b (connector housing portion) housing the connector 1223 is provided in the seat cushion S1211 (seat portion) at the rear end portion, that is, the rear end portion 1212, which avoids the position where the load from the occupant is applied, and the recess 1212b is covered with the trim cover 1230, so that the phenomenon that the sitting feel is lowered by the connector 1223 can be suppressed, and the occurrence of the falling-off of the connector 1223 can be suppressed.

Further, a bulge portion 1212a bulging toward the seating surface side is formed at a rear end portion 1212, which is a rear end portion of the seat cushion pad 1210, and a concave portion 1212b is provided in the bulge portion 1212a. According to this structure, the accommodated state of the connector 1223 in the concave portion 1212b becomes stable, and thus it is preferable.

In the above example, the seat portion is the seat cushion S121 that is a hip support portion (seat portion) for supporting the buttocks of the occupant, the bulge portion 1212a is formed at the rear end 1212 of the seat cushion pad 1210, and the concave portion 1212b is provided at the rear end of the bulge portion 1212 a. According to this structure, the connector 1223 is accommodated in the concave portion 1212b of the bulge portion 1212a formed at the rear end portion in the seat cushion S121 (buttock support portion), and therefore, the phenomenon that the sitting feeling is lowered by the connector can be appropriately suppressed.

With respect to the case where concave portion 1212b includes convex portion 1212c

As shown in fig. 43 and 44, the recess 1212b of the seat cushion pad 1210 may also include a protrusion 1212c. Specifically, it is preferable that a convex portion 1212c protruding rearward is formed below the concave portion 1212 b. According to this structure, the connector 1223 accommodated in the concave portion 1212b is supported from below by the convex portion 1212c, and thereby the accommodated state of the connector 1223 in the concave portion 1212b becomes more stable.

Further, as shown in fig. 44, the width L2 of the convex portion 1212c is preferably smaller than the width L1 of the concave portion 1212b in the width direction of the seat cushion S121 (seat portion). According to this structure, since the width L2 of the convex portion 1212c is small, the influence on the layout of the conductive portion 1224 (harness) can be suppressed, and the conductive portion 1224 can be appropriately arranged in the concave portion 1212 b.

Variation of

The present invention is not limited to the embodiments described above. For example, in the illustrated embodiment, the sensor member 1220 is provided in the seat cushion S121, but may also be provided in the seat back S122. Specifically, the detection unit 1221 may be disposed on the seating surface side of the seat back S122, and a recess for accommodating the connector 1223 may be formed at the lower end (end) of the seat back pad (not shown).

In the embodiment described above, the recess 1212b is provided at the rear end 1212 of the seat cushion pad 1210. As long as the end portion of the seat cushion S121, which is the sitting portion, that is, the position where the load from the occupant is applied is avoided, a recess for accommodating the connector may be provided at an end portion other than the rear end portion 1212, that is, at the front end portion 1211 or the side end portion 1213 of the seat cushion pad 1210.

Next, a seat cushion pad 1210A according to a modification will be described with reference to fig. 45 and 46. Fig. 45 is a plan view of a seat cushion pad 1210A according to a modification, and fig. 46 is a sectional view taken along line B-B of fig. 45. In the following description, only the portions different from the above-described embodiments will be described.

The through hole 1214A included in the seat cushion pad 1210A of the modified example includes a connector insertion portion 1214Aa for passing the connector 1223 to the rear, and a slit 1214Ab at the front. The connector insertion portion 1214Aa is configured to allow the connector 1223 and the conductive portion 1224 to be inserted from above to below the seat cushion pad 1210A when the sensor member 1220 is disposed at the time of assembly, and includes a size through which the connector 1223 can be inserted.

As shown in fig. 46, the conductive portion 1224 of the sensor member 1220 is inserted into the slit 1214 Ab. Specifically, the conduction portion 1224 extending rearward from the detection portion 1221 is inserted into the slit 1214Ab formed in the through hole 1214A of the seat cushion pad 1210A, and is bent downward.

The conductive portion 1224 of the sensor member 1220 may be bent to have a zigzag shape depending on the position of the through hole 1214A in the seat cushion pad 1210A (pad member), but by disposing the conductive portion 1224 in the slit 1214Ab of the through hole 1214A, the fixation of the conductive portion 1224 in the through hole 1214A is improved.

At this time, the slit 1214Ab extends in the width direction of the seat cushion S121 (the sitting portion), and the conduction portion 1224 of the sensor member 1220 is easily disposed in the slit 1214 Ab.

The seat cushion S121 (sitting portion) is a buttock support portion for supporting buttocks of the sitting person, the through hole 1214A is disposed on the side of the seat cushion pad 1210A near the rear end 1212A, and the slit 1214Ab is disposed on the front side of the through hole 1214A. In this configuration, the conduction portion 1224 extending from the detection portion 1221 disposed at the sitting position can be disposed in the slit 1214Ab and guided rearward.

Further, the slit 1214Ab is preferably formed narrower than the through hole 1214A in the front-rear direction of the seat cushion S121 (the seat portion). In this structure, the seat cushion pad 1210A is capable of appropriately fixing the sensor member 1220 by sandwiching the conductive portion 1224 of the sensor member 1220 in the front-rear direction in the slit 1214 Ab.

The position of the slit 1214Ab in the through hole 1214A is not limited to the above example, and the slit 1214Ab may be disposed on the side or rear of the through hole 1214A. Further, a plurality of slits 1214Ab may be formed in the through-hole 1214A according to the number of the via portions 1224.

As described above, the chair according to the present embodiment is described by taking a vehicle seat (vehicle seat) as an example. The chair of the present embodiment is not particularly limited as long as the seat portion has the sensor member, the cushion member, and the skin material, but is preferably a vehicle seat mounted on a vehicle. The chair according to the present embodiment can appropriately dispose the sensor member even when the chair is used as a vehicle seat mounted in a vehicle having a limited space.

The chair of the present embodiment is not particularly limited in application as long as the seat portion has the sensor member, the cushion member, and the skin material. For example, the chair of the present invention can be used as an office chair for use in a room other than a vehicle.

According to the chair of the present invention, the concave portion for accommodating the connector is provided at the end portion of the seat portion which is away from the position where the load from the seated person is applied, and the concave portion is covered with the skin member, so that the phenomenon that the sitting feeling is lowered by the connector is suppressed, and the occurrence of the falling-off of the connector is suppressed.

Further, according to the chair of the present invention, the concave portion is provided in the bulge portion bulging toward the seating surface side, so that the state of the connector accommodated in the concave portion becomes stable.

Further, according to the chair of the present invention, the connector is accommodated in the recess of the bulge portion formed at the rear end portion in the hip support portion, so that the phenomenon that the sitting feeling is lowered by the connector is suppressed.

Further, according to the chair of the present invention, the connector accommodated in the concave portion is supported from below by the convex portion, whereby the accommodated state of the connector in the concave portion becomes more stable.

Further, according to the chair of the present invention, the width of the protruding portion is small, and thus, the influence on the layout of the conductive portion is suppressed, and the conductive portion can be appropriately arranged.

Further, according to the chair of the present invention, the conductive portion of the sensor member may be bent in a zigzag shape depending on the position of the through hole of the pad member, but the fixing property of the conductive portion in the through hole is improved by disposing the conductive portion in the slit of the through hole.

Further, according to the chair of the present invention, the conductive portion of the sensor member is easily disposed in the slit.

Further, according to the chair of the present invention, the conduction portion extending from the detection portion disposed at the sitting portion can be disposed in the slit and guided rearward.

Further, according to the chair of the present invention, the cushion member sandwiches the conduction portion of the sensor member in the slit in the front-rear direction, whereby the sensor member can be appropriately fixed.

Further, according to the chair of the present invention, even when the chair is used as a vehicle seat mounted in a vehicle having a limited space, the sensor member can be appropriately arranged.

Description of symbols

1: seat frame

2: rotating shaft

3: sliding mechanism

4: height adjusting mechanism

10: seat cushion frame

11: cushion side frame

12: base frame

13: rear pipe

14: elastic spring

20. 20B: seat back frame

21: back side frame

22: upper frame

23: lower frame

24: horizontal connecting frame

25: vertical connecting frame

26: steel wire member

27: pillar mounting member

30. 30A: shoulder brace

31: shoulder support plate

32: shoulder fluid bag (first movable body)

32A: fluid bag for inner shoulder

32B: outside shoulder fluid bag

32a: first shoulder fluid bag

32b: second shoulder fluid bag

32c: third shoulder fluid bag

33: mounting member

34: force application member

34a: board board

34b: rotating shaft

34c: fluid bag

35: waist support

36: waist support plate

37: waist fluid bag (second movable body)

40: weight sensor

41: vehicle speed sensor

42: steering angle sensor

43: pressure sensor

44: bulge pressure sensor

45: rotation angle sensor

50: ECU (control device)

51: acquisition unit

52: determination unit

53: drive unit

55: actuator with a spring

56: electromagnetic valve

57: heater

58: vibration imparting device

S1: vehicle seat (vehicle seat)

S11: cushion pad for chair

S11a: cushion pad for seat

S11b: skin material

S12: chair back

S12a: seat back cushion

S12b: skin material

S13: headrest for head

S13a: headrest cushion

S13b: skin material

S13c: support post

201: seat frame

202: rotating shaft

210: seat cushion frame

220: seat back frame

221: back side frame

221a: lower side frame

221b: connecting frame (Upper side frame)

222: upper frame

222a: vertical part (Upper side frame)

222b: horizontal part (Upper frame)

223: lower frame

224: horizontal connecting frame

225: vertical connecting frame

226: steel wire member

227: middle folding shaft

228: long hole

230: shoulder brace (shoulder support)

235: waist support (waist support)

245: rotation angle sensor

246: medium folding angle sensor

250：ECU

251: acquisition unit

252: determination unit

253: drive unit

260: driving mechanism

261: actuator with a spring

261a: lifting rod

262: connecting rod component

263: first connecting member

264: second connecting component

320: seat back frame

321: back side frame

322: upper frame

323: lower frame

323a: mounting hole

324: horizontal connecting frame

324a: lower flange

324b: support hole

330: shoulder brace

332: shoulder fluid bag

335: waist support

350：ECU

360: support device

361: compression member

361a: central portion

361b: side portion

361c: mounting hook

362: support member

363: supporting steel wire

364: upper fixing plate

364a: upper fixing plate body

364b: horizontal support tube

364c: vertical support tube

365: guide wire

366: lower fixing plate

366a: protrusions

366b: through hole

367: first movable plate

367a: guided portion

368: second movable plate

368a: guided portion

369: third movable plate

369a: guided portion

370: lifting mechanism

371: screw rod

371a: first screw rod

371b: second screw rod

371c: third screw rod

372: motor with a motor housing

372a: first motor

372b: second motor

372c: third motor

373: transfer member

373a: first transmission member

373b: second transmission member

373c: third transfer member

374: fixing member

374a: first upper fixing member

374b: first lower fixing member

374c: second upper fixing member

374d: third upper fixing member

420: seat back frame

421: back side frame

422: upper frame

423: lower frame

424: compression member

424a: upper part

424b: central portion

424c: lower part

425: supporting steel wire

430: shoulder brace

435: waist support

460: side support

462: side fluid bag (third movable body)

S401: vehicle seat (vehicle seat)

S411: cushion pad for chair

S412: chair back

S412b: skin material

S413: headrest for head

510: seat cushion frame

511: cushion side frame

512: base frame

513: front tube

514: rear pipe

520: compression member

521: steel wire

522: front pressure receiving plate

523: central pressure receiving plate

523b: through hole

523c: slit(s)

524: rear pressure receiving plate

524b: body part

524c: inclined part

524d: convex rib

524e: through hole

530: support member

531: first part

532: second part

533: third part

534: fourth part

535: connecting part

540: thigh fluid bag

550：ECU

610: seat cushion frame

640: thigh fluid bag

710: seat cushion frame

740: force application member

741: torsion spring

742: supporting plate

743: thigh fluid bag

744: elastic rotator

744a: protruding part

750：ECU

810: seat cushion frame

811: cushion side frame

812: fixed base frame

812a: longitudinal beam

812b: front beam

812c: plate-like portion

812e: front wall

812f: rear wall

812g: side wall

812h: bottom wall

812k: box body

812l: reinforcing part

812m: rear flange

813: movable base frame

813a: upper plate

813b: front plate

813c: pressure receiving plate

813d: long hole

813e: fixing part

814: front tube

815: rear pipe

816: fastening member

820: length adjusting mechanism

821: first actuator

821a: first fluid bag

822: second actuator

822a: second fluid bag

823: compressor with a compressor body having a rotor with a rotor shaft

824: first control valve

825: first connecting pipe

826: second control valve

827: second connecting pipe

828: operating switch

850：ECU

911: cushion pad for seat

912: liner body

912a: central portion

912b: side portion

912c: cover mounting part

912d: first engaging portion

912e: second engaging part

920: first cover member

920a: engaged part

920b: vent hole

921: second cover member

921a: engaged part

921b: seating sensor mounting part

930: skin material

941: ventilating passage

942: inflow port

943: blowing-out port

945: seating sensor

946: control circuit

947: wire harness

960: fluid bag

960a: thigh fluid bag

960b: waist fluid bag

960c: side fluid bag

S901: vehicle seat (vehicle seat)

S911: cushion pad for chair

S912: chair back

S913: headrest for head

1010: seat cushion frame

1046: external sensor

1047: collision sensor

1050：ECU

1051: acquisition unit

1052: determination unit

1052a: collision prediction unit

1052b: collision determination unit

1060: fluid bag

1061: buttock fluid bag

1062: thigh fluid bag

1063: waist fluid bag

1064: side fluid bag

1070: airbag device

1071: airbag body

1071a: front part

1071b: rear part

1072: inner bag

1072a: discharge hole

1073: gas generating device

S1001: vehicle seat (vehicle seat)

S1011: cushion pad for chair

S1011a: cushion pad for seat

S1011b: skin material

S1012: chair back

S1013: headrest for head

1120: gasket for a vehicle

1130: skin material

1131: quilted pattern

1132: convex part

1133: concave part

1140: fluid bag

1141: first fluid bag

1142: second fluid bag

S1101: vehicle seat (vehicle seat)

S1111: cushion pad for chair

S1112: chair back

S1113: headrest for head

1210. 1210A: cushion pad for seat (cushion component)

1210a: surface of the body

1210b: back surface

1211: front end (first end)

1212. 1212A: rear end (second end, end)

1212a: bulge part

1212b: concave part

1212c: convex part

1213: side end portion

1214. 1214A: through hole

1214Aa: connector insertion part

1214Ab: slit(s)

1220: sensor component

1221: detection unit

1222: external output part

1223: connector with a plurality of connectors

1224: conduction part (wire harness, wiring component)

1224a: a first bending part

1224b: a second bending part

1230: decorating cover (surface material)

S1201: vehicle seat (vehicle seat)

S1211: armchair cushion (seat)

S1212: chair back (sitting portion)

S1213: headrest for head

Claims (10)

1. A vehicle seat comprising: a seat back frame; a skin material covering the seat back frame; a movable body disposed between the seat back frame and the skin material and protruding forward with respect to the seat back frame; and a control device for controlling the movement of the movable body, wherein the vehicle seat is characterized in that,

the movable body has:

A left and right first movable body disposed at an upper portion of the seat back frame; and

a second movable body disposed below the first movable body in the seat back frame,

the control device controls the protruding amount of either one of the first movable body and the second movable body based on the protruding amount of the other.

2. The vehicle seat according to claim 1, wherein the first movable body is a shoulder movable body that supports a shoulder of an occupant,

the second movable body is a lumbar movable body that supports a lumbar portion of an occupant,

the control device controls the protruding amount of either one of the shoulder movable body and the waist movable body to be smaller when the protruding amount of the other is larger when the protruding operation of the shoulder movable body and the waist movable body is controlled.

3. The vehicle seat according to claim 1, wherein the movable body has an inflatable/contractible bag,

the control device acquires a pressure signal related to the pressure applied to the bag body, and controls the protrusion amount of the bag body based on the pressure signal.

4. The vehicle seat according to claim 1, wherein the control device acquires a steering angle signal related to a steering angle of the vehicle, and controls the protruding amount of the movable body in real time based on the steering angle signal.

5. The vehicle seat according to claim 1, wherein,

the first movable body has: an inner first movable body disposed on both sides of the seat back frame in the seat width direction; and left and right outer first movable bodies disposed at outer positions in the seat width direction of the inner first movable bodies.

6. The vehicle seat according to claim 1, wherein the seat back frame has:

left and right lower side frames extending in the up-down direction;

left and right upper frames mounted on upper ends of the left and right lower frames, respectively, and rotatable in a front-rear direction with respect to the lower frames; and

an upper frame connected to the upper side frame,

the first movable body is disposed at a position sandwiched by the left and right upper side frames in the seat width direction.

7. The vehicle seat according to claim 6, wherein the vehicle seat comprises a seat cushion frame,

The seat back frame is attached to a rear end portion of the seat cushion frame so as to be rotatable in a front-rear direction with respect to the seat cushion frame,

the control device acquires a first rotation angle signal related to a rotation angle of the seat back frame relative to the seat cushion frame and a second rotation angle signal related to a rotation angle of the upper side frame relative to the lower side frame, and controls a protruding amount of the movable body based on the first rotation angle signal and the second rotation angle signal.

8. The vehicle seat according to claim 1, wherein,

the vehicle seat includes a lifting mechanism that supports the first movable body so as to be capable of lifting in the up-down direction with respect to the seat back frame.

9. The vehicle seat according to claim 8, wherein the lifting mechanism supports the second movable body so as to be capable of lifting in the up-down direction with respect to the seat back frame,

the control device controls the lifting mechanism to lift the first movable body in accordance with the position of the second movable body in the up-down direction.

10. The vehicle seat according to claim 1, wherein the movable body has a third movable body disposed at a position between the first movable body and the second movable body in a vertical direction of the seat back frame,

the third movable body has a plurality of bag bodies capable of expanding/contracting,

the plurality of bags are stacked, have different sizes, and are arranged in different directions.