JP2009240373A - Seat device - Google Patents

Abstract

The fatigue of a seated person can be reduced.
In a vehicle seat 10, a seating surface adjusting mechanism 30 provided in the seat cushion 12 is displaced with respect to the seat cushion by an input from a pelvis 44 of a seated person 42 seated on the seat cushion 12. A portion of the cushion 12 facing the thigh 46 of the seated person 42 is pushed out toward the thigh 46. Thereby, the contact state between the thigh 46 of the seated person 42 and the seat cushion 12 is ensured, and the thigh 46 and the pelvis 44 of the seated person 42 are stably supported by the seat cushion 12.
[Selection] Figure 4

Description

  The present invention relates to a sheet apparatus.

2. Description of the Related Art Conventionally, a seat structure has been devised in which an upper support plate for supporting a seated person's thoracic vertebra part and a lower support plate for supporting a seated person's pelvis part are incorporated in a seat back (for example, Patent Document 1). reference). In this seat structure, the upper support plate and the lower support plate are relatively moved back and forth in synchronization with the operation of the driving means, so that a comfortable posture of the seated person is ensured.
JP-A-8-205957

  By the way, in a seat device having a low seat cushion seat surface, when the seated person raises his knees and sits on the seat cushion, the thigh of the seated person is separated from the seat cushion. In such a case, since only the seat occupant's buttocks (pelvis) contacts the seat cushion, the seat occupant's weight concentrates on the buttocks and the seat occupant's fatigue increases.

  An object of the present invention is to obtain a seat device that can reduce the fatigue of a seated person in consideration of the above facts.

  The seat device according to the first aspect of the present invention is provided in the seat cushion, and is displaced with respect to the seat cushion by an input from the pelvis of the seated person so that the seat cushion has the thigh of the seated person. It is characterized by comprising a seating surface adjusting means for pushing the opposing part to the thigh side.

  In the seat device according to claim 1, the seat surface adjusting means provided in the seat cushion is displaced with respect to the seat cushion by an input from the pelvis of the seated person sitting on the seat cushion, and the seating person's seat in the seat cushion is displaced. The part facing the thigh (the front part of the seat cushion) is pushed out toward the thigh. Thereby, the contact state between the thigh of the seated person and the seat cushion is ensured, and the thigh of the seated person and the pelvis are stably supported by the seat cushion. Therefore, the fatigue of the seated person can be reduced.

  A seat device according to a second aspect of the present invention is provided in a seat cushion, and is displaced with respect to the seat cushion by an input from the pelvis of the seated person, so that the seat cushion has a thigh on the seated person. Seating surface adjusting means for pushing the opposite part to the thigh side, and a seat occupant in the seat back provided in the seat back and displaced with respect to the seat back by input from the chest of the seat occupant Backrest surface adjusting means for extruding a portion facing the lumbar region to the lumbar region side.

  The “lumbar region” described in claim 2 includes a range from the upper part of the pelvis of the seated person to the lumbar spine.

  In the seat device according to claim 2, the seat surface adjusting means provided in the seat cushion is displaced with respect to the seat cushion by an input from the pelvis of the seated person sitting on the seat cushion, and the seating person's seat in the seat cushion is displaced. The part facing the thigh is pushed out to the thigh. Thereby, the contact state between the thigh of the seated person and the seat cushion is ensured, and the thigh of the seated person and the pelvis are stably supported by the seat cushion. Therefore, the fatigue of the seated person can be reduced.

  In addition, the backrest surface adjusting means provided in the seat back is displaced with respect to the seat back by an input from the chest of the occupant leaning on the seat back, and the part facing the seated person's waist in the seat back (the seat back Extrude the lower part) to the waist side. As a result, a contact state between the seated person's pelvis and the seat back is ensured, and the seated person's pelvis and rib cage are stably supported by the seat back. Therefore, the fatigue of the seated person can be reduced.

  According to a third aspect of the present invention, there is provided a seat device according to the second aspect, wherein the seat surface adjusting means is disposed with respect to the seat cushion and the backrest surface adjusting means is disposed with respect to the seat back. An arrangement changing means for changing at least one of them is provided.

  In the seat device according to the third aspect, at least one of the arrangement of the seat surface adjustment means with respect to the seat cushion and the arrangement of the backrest adjustment means with respect to the seat back can be changed by the arrangement changing means. Therefore, at least one of the support state between the pelvis and the thigh by the seat surface adjustment means and the support state between the rib cage and the pelvis by the backrest adjustment means can be adjusted according to the physique of the seated person. .

  According to a fourth aspect of the present invention, there is provided a seat device according to the third aspect, wherein the seat device according to the third aspect operates a detecting means for detecting a sciatic nodule of a seated person and the arrangement changing means based on a detection result of the detecting means. And a control means for making it possible.

  In the seat device according to the fourth aspect, when the detection means detects the sciatic bone nodules of the seated person, the control means activates the arrangement changing means based on the detection result. As a result, at least one of the arrangement of the seat surface adjustment means with respect to the seat cushion and the arrangement of the backrest surface adjustment means with respect to the seat back is changed. Therefore, at least one of the supporting state of the pelvis and the thigh by the seat surface adjusting means and the supporting state of the rib cage and the pelvis by the backrest adjusting means is adjusted without accompanying the seating person's adjusting operation. Can do.

  A seat device according to a fifth aspect of the present invention is the seat device according to any one of the second to fourth aspects, wherein at least one of the seat surface adjusting means and the backrest surface adjusting means is the An input / output ratio changing means for changing the ratio between the input and the pushing force is provided.

  In the seat device according to the fifth aspect, at least one of the seat surface adjusting means and the backrest adjusting means can change the ratio of the input and the pushing force by the input / output ratio changing means. Therefore, it is possible to provide a sitting comfort according to the preference of the seated person.

  As described above, in the seat device according to the first aspect of the present invention, the fatigue of the seated person can be reduced.

  In the seat device according to the second aspect of the present invention, the fatigue of the seated person can be reduced.

  In the seat device according to the third aspect of the present invention, at least one of a supporting state of the pelvis and the thigh by the seat surface adjusting means and a supporting state of the thoracic vertebra and the pelvis by the backrest adjusting means is seated. It can be adjusted according to the physique of the person.

  In the seat device according to the fourth aspect of the present invention, at least one of a supporting state of the pelvis and the thigh by the seat surface adjusting means and a supporting state of the thoracic vertebra and the pelvis by the backrest adjusting means is seated. It is possible to adjust without accompanying the operator's adjustment operation.

  In the seat device according to the fifth aspect of the present invention, it is possible to provide a sitting comfort according to the preference of the seated person.

<First Embodiment>
FIG. 1 is a schematic perspective view showing the structure of a skeleton of a vehicle seat 10 as a seat device according to an embodiment of the present invention. FIG. 2 is a schematic longitudinal sectional view showing the configuration of the main part of the vehicle seat 10.

  As shown in these drawings, a vehicle seat 10 includes a seat cushion 12 for seating an occupant, and a seat back 14 that supports the back of a seated occupant (hereinafter referred to as “seat occupant”). It has.

  The seat cushion 12 has a cushion frame 16 constituting its skeleton. The cushion frame 16 includes a pair of left and right side portions 18 and 20 extending in the front-rear direction of the seat cushion 12 and front portions connecting the front end sides of the side portions 18 and 20 on both side portions of the seat cushion 12 in the left-right direction. 22.

  The front portion 22 includes a front wall portion 22A that extends in the left-right direction of the seat cushion 12, and a pair of left and right side wall portions 22B that extend from both longitudinal ends of the front wall portion 22A to the rear end side of the seat cushion 12. 22C and these side wall parts 22B and 22C are couple | bonded with the front end side of the side parts 18 and 20. As shown in FIG. Further, a plate-like top wall portion 22D is provided at the upper end portion of the front portion 22, and the upper end portions of the side wall portions 22B and 22C and the front wall portion 22A are connected by the top wall portion 22D.

  Further, the rear end portions of the side portions 18 and 20 are connected by a rod 24 formed in a columnar shape. Between this rod 24 and the above-mentioned ceiling wall part 22D, the cushion spring 26 comprised by the some wire-like spring material is spanned.

  A cushion pad 28 made of a foam material or the like is attached to the upper side of the cushion frame 16 described above, as shown in FIG. The cushion pad 28 is supported by the front portion 22 (top wall portion 22D) of the cushion frame 16 and the cushion spring 26, and the surface is covered with a skin (not shown).

  On the other hand, a seating surface adjusting mechanism 30 constituting a seating surface adjusting means is provided between the side portions 18 and 20 below the top wall portion 22D and the cushion spring 26. The seating surface adjustment mechanism 30 includes a lower thigh plate 32 and a lower pelvis plate 34 formed in a long plate shape. The lower thigh plate 32 extends in the left-right direction of the seat cushion 12 near the lower side of the top wall 22D, and the lower pelvis plate 34 extends in the left-right direction of the seat cushion 12 near the lower side of the cushion spring 26. Exist.

  Both ends in the longitudinal direction of the lower thigh plate 32 and the lower pelvis plate 34 are connected by links 36, respectively. These links 36 are formed in a long plate shape, and are arranged in a state where the longitudinal direction is along the front-rear direction of the seat cushion 12. One link 36 is disposed opposite to and close to the side portion 18 of the cushion frame 16, and an intermediate portion in the longitudinal direction is rotatably supported by a support shaft 38 attached to the side portion 18. The other link 36 is disposed so as to face and close to the side portion 20 of the cushion frame 16, and a middle portion in the longitudinal direction is rotatably supported by a support shaft 38 attached to the side portion 20. Thereby, the seat surface adjustment mechanism 30 can be rotated around the support shaft 38 (around the axis along the left-right direction of the seat cushion 12), and the lower thigh plate 32 and the lower pelvis are associated with the rotation. The plate 34 is displaced up and down with respect to the cushion frame 16.

  As shown in FIG. 3, when the seated person 42 is seated on the seat cushion 12, the lower pelvis plate 34 is disposed below the pelvis 44 of the seated person 42, and below the thigh 46 of the seated person 42. The lower thigh plate 32 is disposed on the top. Further, a long rectangular through hole 48 is formed in the top wall portion 22 </ b> D of the cushion frame 16 at a portion facing the lower thigh plate 32, and the lower thigh plate 32 passes through the through hole 48. Opposing to the cushion pad 28.

  On the other hand, as shown in FIG. 1, the seat back 14 includes a back frame 50 constituting the skeleton thereof. The back frame 50 includes a pair of left and right side portions 52 and 54 that extend in the vertical direction of the seat back 14 and upper portions that connect the upper ends of the side portions 52 and 54 at both sides in the left and right direction of the seat back 14. 56. Lower end portions of the side portions 52 and 54 are connected to rear end portions of the side portions 18 and 20 (cushion frame 16) through a reclining mechanism (not shown).

  Between the side portions 52 and 54, a back spring 58 is provided which is configured in a wire mesh shape by a wire-like spring material. The back spring 58 has an upper end connected to the upper ends of the side portions 52 and 54, and a lower end connected to the lower ends of the side portions 52 and 54. A back pad 60 made of a foam material or the like is attached to the front side of the back spring 58. The back pad 60 has an upper end wound around the upper portion 56 of the back frame 50 and a lower end wound around the reclining rod 61 of the reclining mechanism described above. Further, the surface of the back pad 60 is covered with a skin (not shown).

  Further, a backrest adjustment mechanism 62 constituting a backrest adjustment means is provided between the side portions 52 and 54 on the rear side of the back spring 58. The backrest adjustment mechanism 62 includes a thoracic posterior plate 64 formed in a long plate shape, and a pelvic posterior plate 66 disposed below the thoracic posterior plate 64. The thoracic posterior plate 64 and the pelvis posterior plate 66 extend in the left-right direction of the seat cushion 12 in the vicinity of the back of the back spring 58.

  Both ends in the longitudinal direction of the thoracic posterior plate 64 and the pelvis posterior plate 66 are connected by links 68, respectively. These links 68 are formed in a long plate shape, and are arranged in a state where the longitudinal direction is along the vertical direction of the seat back 14. One link 68 is disposed opposite to and close to the side portion 52 of the back frame 50, and a middle portion in the longitudinal direction is rotatably supported by a support shaft 70 attached to the side portion 52. The other link 68 is disposed opposite to and close to the side portion 54 of the back frame 50, and a middle portion in the longitudinal direction is rotatably supported by a support shaft 70 attached to the side portion 54. Accordingly, the backrest adjustment mechanism 62 can be rotated around the support shaft 70 (around the axis line along the left-right direction of the seat back 14), and the rib cage rear plate 64 and the pelvis are associated with the rotation. The rear plate 66 is displaced back and forth with respect to the back frame 50.

  As shown in FIG. 3, when the seated person 42 is drowned in the seat back 14, the rib cage rear plate 64 is disposed behind the lower end of the chest 45 of the seated person 42, and the pelvis 44 of the seated person 42. A pelvic posterior plate 66 is disposed behind the upper end.

  Next, the operation of this embodiment will be described.

  In the vehicle seat 10 having the above-described configuration, as shown in FIG. 3, the seated person 42 is seated with the pelvis 44 (butt portion) approaching the seat back 14 and the legs extended forward (normally). In the seated state), the back of the seated person 42 is elastically supported by the back frame 50 (back spring 58) through the back pad 60, and the pelvis 44 and thigh 46 of the seated person 42 are placed through the cushion pad 28. And is elastically supported by the cushion frame 16.

  On the other hand, as shown in FIG. 4, when the seated person 42 sits with the pelvis 44 shifted to the front side of the seat cushion 12, the seat back 14 is higher than the normal sitting state from the thorax 45 of the seated person 42. Load is input. For this reason, the back pad 60 and the back spring 58 are pushed by the rib cage 45 and bent rearward, and the rib cage rear plate 64 of the backrest adjustment mechanism 62 is displaced rearward by the back spring 58 (arrow A in FIG. 4). reference). As a result, the link 68 is rotated around the support shaft 70, and the pelvic rear plate 66 is displaced forward by the link 68 (see arrow B in FIG. 4). Therefore, the lower ends of the back spring 58 and the back pad 60 are pushed forward by the pelvis rear plate 66 (the pelvis side of the seated person 42), and the lower end side of the back pad 60 is brought into close contact with the waist 49 of the seated person 42.

  In this state, a sufficient contact area between the seat occupant 42 and the seat back 14 is ensured, and the back of the seat occupant 42 is stably supported by the thoracic posterior plate 64 and the pelvic posterior plate 66. A comfortable posture (a posture in which the spinal column 47 is curved in a substantially S-shape) is maintained. Therefore, fatigue of the seated person 42 can be suppressed.

  As shown in FIG. 4, when the seated person 42 sits with his knees raised, a higher load than the normal sitting state is input to the seat cushion 12 from the pelvis 44 of the seated person 42. For this reason, the cushion pad 28 and the cushion spring 26 are pushed by the pelvis 44 and bent downward, and the pelvic lower plate 34 of the seat surface adjustment mechanism 30 is displaced downward (see arrow C in FIG. 4). As a result, the link 36 is rotated around the support shaft 38, and the lower thigh plate 32 is displaced upward by the link 36 (see arrow D in FIG. 4). For this reason, the front end side of the cushion pad 28 is pushed upward by the lower thigh plate 32 (the thigh 46 side of the seated person 42), and the front end side of the cushion pad 28 is brought into close contact with the thigh 46 of the seated person 42.

  In this state, a sufficient contact area between the seated person 42 and the cushion pad 28 is ensured, and the pelvis 44 and the thigh 46 of the seated person 42 are stably supported by the lower pelvis plate 34 and the lower thigh plate 32. The seated person 42 is maintained in an ideal comfortable posture. Therefore, fatigue of the seated person 42 can be suppressed.

  As shown in FIG. 5, in a normal vehicle seat 200 (a vehicle seat from which the seat surface adjustment mechanism 30 and the backrest adjustment mechanism 62 are omitted), the seated person 42 pushes the pelvis 44 of the seat cushion 12. When seated while being displaced forward, only the upper side of the back of the seated person 42 contacts the seat back 14, and a gap 76 is formed between the waist 49 of the seated person 42 and the seat back 14. For this reason, the weight of the seat occupant 42 is concentrated on the upper side of the back of the seat occupant 42, and fatigue of the seat occupant 42 increases. Further, as shown in FIG. 5, when the seated person 42 is sitting with his knees raised, only the pelvis 44 (butt) of the seated person 42 contacts the seat cushion 12, and the thigh of the seated person 42. A gap 78 is generated between the portion 46 and the seat cushion 12. For this reason, the weight of the seated person 42 concentrates on the buttocks of the seated person 42, and the fatigue of the seated person 42 increases. Thus, in the normal vehicle seat 200, the degree of fatigue of the seated person 42 depends on how the seated person 42 sits.

  In this regard, in the vehicle seat 10 according to the first embodiment, as described above, even when the seated person 42 slides the pelvis 44 toward the front side of the seat cushion 12 or raises the knee, the seated person Since the contact area between the seat back 14 and the seat cushion 12 is ensured satisfactorily, the seat occupant 42 can be maintained in a comfortable posture regardless of how the seat occupant 42 sits. Moreover, since the seat surface adjustment mechanism 30 and the backrest surface adjustment mechanism 62 rotate according to the movement of the seated person 42, it is possible to suppress the seated person 42 from feeling uncomfortable or uncomfortable.

  In the vehicle seat 10 according to the first embodiment, the lower end portion of the rib cage 45 is supported by the rib cage rear plate 64 of the backrest adjustment mechanism 62 (the rib cage 45 is supported from below). 45 can be stably supported, and the disc pressure of the seated person 42 can be reduced. Therefore, the fatigue of the seated person 42 can be reduced also by this. Further, since the upper end portion of the pelvis 44 is supported by the pelvic rear plate 66 of the backrest adjustment mechanism 62, the pelvis 44 can be stably supported, and the pelvic rear plate 66 is interlocked with the thoracic rear plate 64. Therefore, the relative position between the rib cage 45 and the pelvis 44 can be adjusted well to maintain the spinal column 47 in an ideal substantially S-shape.

  Furthermore, in the vehicle seat 10 according to the first embodiment, since the back spring 58 is interposed between the backrest adjustment mechanism 62 and the back pad 60, the chest rear plate 64 and the pelvis rear plate 66 are used. The back pad 60 is not locally deformed, and the back pad 60 can be smoothly deformed. Therefore, it is possible to prevent the seated person 42 from feeling uncomfortable or uncomfortable.

  In the first embodiment, the vehicle seat 10 includes both the seat surface adjustment mechanism 30 and the backrest adjustment mechanism 62. However, the present invention is not limited to this, and the backrest adjustment mechanism is used. A configuration in which 62 is omitted may be adopted.

Next, another embodiment of the present invention will be described. In addition, about the structure and effect | action similar to the said 1st Embodiment, the same code | symbol as the said 1st Embodiment is attached | subjected and the description is abbreviate | omitted.
<Second Embodiment>
FIG. 6 is a schematic longitudinal sectional view showing a configuration of a main part of a seat back 14 which is a constituent member of a seat device (vehicle seat) according to a second embodiment of the present invention. The vehicle seat according to this embodiment has basically the same configuration as the vehicle seat 10 according to the first embodiment, and the seat back 14 is provided with a backrest adjustment mechanism 62. . However, in this embodiment, a support shaft 70 that rotatably supports the link 68 of the backrest adjustment mechanism 62 is attached to the back frame 50 (not shown in FIG. 6) via a slide mechanism 80 (arrangement changing means). It has been.

  The slide mechanism 80 includes a front / rear slide portion 82 that moves the backrest adjustment mechanism 62 relative to the seatback 14 in the front / rear direction (arrow F direction in FIG. 6), and the backrest adjustment mechanism 62 to the seatback 14. On the other hand, an up / down slide part 84 is provided for relative movement in the up / down direction (the direction of arrow E in FIG. 6). Note that the slide mechanism 80 may be either a manual type or an electric type.

For this reason, in this embodiment, arrangement | positioning of the backrest adjustment mechanism 62 with respect to the seat back 14 can be changed to the front-back direction and an up-down direction. Therefore, the support state of the chest 45 and the pelvis 44 of the seated person 42 by the backrest adjustment mechanism 62 can be changed according to the body size of the seated person 42.
<Third Embodiment>
FIG. 7 is a schematic longitudinal sectional view showing a configuration of a main part of a seat cushion 12 which is a component of a seat device (vehicle seat) according to a third embodiment of the present invention. The vehicle seat according to this embodiment has basically the same configuration as the vehicle seat 10 according to the first embodiment, and the seat cushion 12 is provided with a seating surface adjustment mechanism 30. However, in this embodiment, a support shaft 38 that rotatably supports the link 36 of the seat surface adjustment mechanism 30 is attached to the cushion frame 16 via a slide mechanism 86 (arrangement changing means).

  The slide mechanism 86 is driven by a driving force of a motor 92 and a front / rear slide portion 90 that moves the seat surface adjustment mechanism 30 relative to the seat cushion 12 in the front-rear direction (arrow G direction in FIG. 7). An up-and-down slide portion 94 that moves the seat surface adjustment mechanism 30 relative to the seat cushion 12 in the up-and-down direction (the direction of arrow H in FIG. 7) is provided.

  Further, an ECU 96 as a control means is electrically connected to the motors 88 and 92 described above, and a pressure sensor 98 as a detection means is electrically connected to the ECU 96. The pressure sensor 98 is interposed above the cushion spring 26 and between the cushion pad 28 and a skin (not shown) that covers the cushion pad 28.

  The pressure sensor 98 detects the pressure (seat pressure) received from the buttocks of the seated person 42 and outputs a predetermined electrical signal to the ECU 96. The ECU 96 detects the maximum value of the seat pressure (pressure received from the sciatic nodule of the seated person 42) based on the electric signal from the pressure sensor 98, and detects the position of the sciatic nodule relative to the seat cushion 12 and the physique of the seated person 42. . Then, the ECU 96 operates the motors 88 and 92 based on the detection result to adjust the arrangement of the seat surface adjustment mechanism 30 relative to the seat cushion 12 up and down and up and down, and the lower pelvis plate 34 below the sciatic nodule (pelvis 44). Place it in the optimal position.

  Thus, in this embodiment, since the arrangement of the seating surface adjustment mechanism 30 is automatically adjusted according to the position of the pelvis 44 (sciatic nodule) of the seated person 42 and the physique of the seated person 42, the seated person 42 This eliminates the need for adjustment operations. Further, even when the seated person 42 changes the sitting posture, the seat surface adjusting mechanism 30 is always arranged at the optimum position, so that the seated person 42 can always be provided with a comfortable sitting comfort.

In the second embodiment described above, the slide mechanism 80 may be configured to be driven by a motor, and the operation of the motor may be controlled by the ECU 96. That is, the ECU 96 may operate the motor of the slide mechanism 80 based on the detection result of the pressure sensor 98 to automatically adjust the arrangement of the backrest adjustment mechanism 62 with respect to the seat back 14. In this case, since the arrangement of the backrest adjustment mechanism 62 is automatically adjusted in accordance with the position of the pelvis 44 (sciatic nodule) of the seated person 42 and the physique of the seated person 42, the trouble of adjusting the seated person 42 is troublesome. Since the backrest surface adjustment mechanism 62 is always arranged at the optimum position, it is possible to provide the seated person 42 with a comfortable sitting comfort.
<Fourth Embodiment>
8A and 8B schematically show the configuration of the main part of the backrest adjustment mechanism 100, which is a component of the seat device (vehicle seat) according to the fourth embodiment of the present invention. It is shown in a longitudinal sectional view. The backrest adjustment mechanism 100 is basically configured in the same manner as the backrest adjustment mechanism 62 according to the first embodiment. A long hole 102 constituting the means is formed. The long hole 102 is formed along the longitudinal direction of the link 68 (up and down direction of the seat back 14), and the support shaft 104 constituting the input / output ratio changing means is inserted into the long hole 102. . The support shaft 104 is attached to the back frame 50 via a slide mechanism (not shown), and moves relative to the link 68 (backrest adjustment mechanism 100) in the vertical direction. As a result, the distance from the thoracic posterior plate 64 to the support shaft 104 and the distance from the pelvis posterior plate 66 to the support shaft 104 are changed, and the input F1 from the thoracic rib 45 to the thoracic posterior plate 64 and the back by the pelvis posterior plate 66 are changed. The ratio (insulator ratio) with the pushing force F2 of the pad 60 is changed.

  That is, in this embodiment, as shown in FIG. 8A, in a state where the support shaft 104 is disposed at the center in the longitudinal direction of the long hole 102, the distance L1 from the rib cage rear plate 64 to the support shaft 104 is The distance L2 from the pelvis rear plate 66 to the support shaft 104 is configured to be equal. In this state, the ratio (F1 / F2) between the input F1 and the pushing force F2 is 1.

  Further, as shown in FIG. 8B, when the support shaft 104 is arranged at the upper end of the long hole 102, the distance from the thoracic posterior plate 64 to the support shaft 104 is less than the distance L3 from the pelvic posterior plate 66. The distance L4 to the support shaft 104 is configured to be longer. In this state, the ratio (F1 / F2) between the input F1 and the pushing force F2 is larger than 1. Although not shown, the ratio (F1 / F2) between the input F1 and the pushing force F2 is smaller than 1 when the support shaft 104 is disposed at the lower end of the long hole 102.

  As described above, in this embodiment, the load sharing between the thoracic posterior plate 64 and the pelvis posterior plate 66 can be changed by moving the support shaft 104 relative to the link 68 up and down. The pushing force F2 (the amount by which the back pad 60 is pushed toward the pelvis 44) can be adjusted. Therefore, it is possible to provide a sitting comfort according to the preference of the seated person 42.

  Note that the input / output ratio changing means as described above can be similarly applied to the seat surface adjustment mechanism 30 according to the first embodiment. In this case, since the ratio between the input from the pelvis 44 to the pelvis lower plate 34 and the pushing force of the cushion pad 28 by the lower thigh plate 32 can be changed, the pushing amount of the cushion pad 28 by the lower thigh plate 32 is It becomes possible to adjust according to the preference of the seated person 42.

  Further, in the first to fourth embodiments, the seat surface adjusting mechanism 30 that is rotated around the support shaft 38 is employed as the seat surface adjusting means, and the support shaft 70 (support shaft 104) is surrounded. The backrest surface adjustment mechanism 62 (backrest surface adjustment mechanism 100) that is rotated to the back is adopted as the backrest surface adjustment means. However, the present invention is not limited to this, and the configuration of the seat surface adjustment means and the backrest surface adjustment means. Can be appropriately changed.

It is a perspective view which shows the structure of the frame | skeleton of the vehicle seat which concerns on the 1st Embodiment of this invention. It is a longitudinal cross-sectional view which shows the structure of the principal part of the vehicle seat which concerns on the 1st Embodiment of this invention. It is a longitudinal cross-sectional view for demonstrating the state where the seated person who seated on the vehicle seat which concerns on the 1st Embodiment of this invention took the normal seating attitude | position. It is a longitudinal cross-sectional view for demonstrating the state which the seated person who seated on the vehicle seat which concerns on the 1st Embodiment of this invention shifted the pelvis to the front side of the seat cushion. It is a longitudinal cross-sectional view for demonstrating the state which the seated person seated on the normal vehicle seat shifted the pelvis to the front side of the seat cushion. It is a longitudinal cross-sectional view which shows the structure of the seat back which is a structural member of the vehicle seat which concerns on the 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the structure of the seat cushion which is a structural member of the vehicle seat which concerns on the 3rd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the structure of the backrest adjustment mechanism which is a structural member of the vehicle seat which concerns on the 4th Embodiment of this invention.

Explanation of symbols

10 Vehicle seat (seat device)
12 Seat cushion 14 Seat back 30 Seat surface adjustment mechanism (seat surface adjustment means)
42 Seated person 44 Pelvis 45 Thorax 46 Thigh 62 Backrest adjustment mechanism (backrest adjustment means)
80 Slide mechanism (placement changing means)
86 Slide mechanism (placement changing means)
96 ECU (control means)
98 Pressure sensor (detection means)
100 Backrest adjustment mechanism (backrest adjustment means)
102 Long hole (I / O ratio changing means)
104 Support shaft (I / O ratio changing means)

Claims (5)

  A seat that is provided in the seat cushion and that is displaced with respect to the seat cushion by an input from the pelvis of the seated person and pushes a portion of the seat cushion that faces the thigh of the seated person toward the thigh side. A seat device provided with a surface adjusting means. A seat that is provided in the seat cushion and that is displaced with respect to the seat cushion by an input from the pelvis of the seated person and pushes a portion of the seat cushion facing the seated person's thigh toward the thigh Surface adjustment means;
A backrest surface adjusting means provided in the seat back and configured to push the portion of the seat back facing the seat waist to the waist side by being displaced with respect to the seat back by an input from the chest of the seat seat When,
A seat apparatus comprising:   The arrangement changing means for changing at least one of the arrangement of the seating surface adjusting means with respect to the seat cushion and the arrangement of the backrest adjusting means with respect to the seat back. Sheet device.   The seat apparatus according to claim 3, further comprising: a detecting unit that detects a sciatic bone nodule of a seated person; and a control unit that operates the arrangement changing unit based on a detection result of the detecting unit.   The at least one of the said seat surface adjustment means and the said backrest adjustment means was equipped with the input / output ratio change means to change the ratio of the said input and the said extrusion force, The Claim 2-4 The sheet apparatus according to any one of the above.

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