Sheet

Abstract

To provide a seat which enables a user to perform an exercise for training a body trunk while sitting thereon.SOLUTION: A vehicle seat S includes a seat cushion 1 supporting a hip of a seated person. A pelvis kinetic machine 3 which swings while supporting the seated person is disposed in the seat cushion 1. The pelvis kinetic machine 3 is disposed in the seat cushion 1 or a seat back 2 forming the vehicle seat S and is supported by a part of the vehicle seat S so as to swing in at least one direction and an opposite direction of the one direction with respect to a portion opposite to the side supporting the seated person.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a seat, and more particularly to a seat capable of applying a load to an occupant for the occupant's exercise. [Background technology]

[0002] In recent years, for example, in the case of vehicle seats, seats that are comfortable to sit on and can reduce the load on a seated person even when the person sits in the seat for a long period of time have become widespread. On the other hand, the widespread use of vehicles has led to a problem of lack of physical activity among people. In order to solve such problems, Patent Document 1 discloses a vehicle seat that is integrally provided with a training device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2008-536551 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the training device installed in the seat described in Patent Document 1 was for training the arms and legs, not for training the trunk. Here, the trunk refers to the human torso, including the pelvis, spine, ribs, shoulder blades, and the superficial and deep muscles surrounding them. Strengthening your core has the following benefits: (1) it increases blood flow and improves your basal metabolism, thereby preventing fat accumulation; (2) it reduces the load on your intervertebral discs, thereby relieving lower back pain; and (3) it improves your posture by strengthening your transverse abdominis muscles.

[0005] The present invention has been made in consideration of the above problems, and has an object to provide a seat that allows a person to exercise their trunk while sitting. [Means for solving the problem]

[0006] The above-mentioned problem is solved by the seat of the present invention, which is a seat including at least a seat portion on which a seated person sits, and a rocking member is disposed in the seat portion so as to be rockable while supporting the seated person, and the rocking member is supported by a part of the seat portion so as to be rockable in at least one direction and in a direction opposite to the one direction, based on a portion on the opposite side of the side supporting the seated person. The rocking member has a flat surface portion that supports the seated occupant and a side surface portion, and a biasing member is disposed below the flat surface portion of the rocking member, and the biasing member is fixed to the side surface portion of the rocking member. This problem is solved by According to the above-mentioned configuration, the seat occupant can exercise the trunk while sitting on the seat having the rocking member arranged on the seat part so as to be rockable in at least one direction. In particular, in the case of a vehicle seat, the occupant can exercise while driving.

[0008] Also, The biasing member extends from a side surface of the swinging member in a direction perpendicular to the up-down direction of the seat. This is preferable.

[0009] Also, The biasing member extends from the center of the upper and lower portions of the swinging member. This is preferable.

[0010] Also, The seat portion includes a seat cushion frame, and the seat cushion frame has side frames arranged on the left and right sides in the seat width direction, and the biasing member is fixed to the side frames at the ends of the extensions extending from the upper and lower central parts of the swinging member. This is preferable.

[0011] Also, The biasing members extend radially in all four directions from the upper and lower central portions of the swinging member. This is preferable.

[0012] Also, The planar portion of the rocking member is formed with two grooves for supporting the seated occupant. good.

[0013] Also, Each of the two grooves is formed in a substantially elliptical shape in a plan view. This is preferable.

[0014] Also, The shape of the two grooves in a plan view is such that the length in the seat width direction is longer than the length in the seat front-rear direction. good.

[0016] Also, The groove may be formed so as to conform to a lower end of the pelvis of the seated occupant. The biasing member may be disposed at a position not overlapping with the groove when viewed in the sheet width direction. Effect of the Invention

[0017] According to the present invention, a seated person can exercise his / her core while sitting in the seat. Furthermore, according to the present invention, the rocking state of the rocking member can be freely controlled. Furthermore, the rocking motion of the rocking member can be adjusted to suit the movement of the seated occupant. Furthermore, the position of the center of gravity of the seated occupant can be easily calculated from the amount of displacement of the biasing member. Furthermore, if it is determined that the load applied to the seated occupant is high or low, the rocking of the rocking member can be adjusted so that the load becomes appropriate. Furthermore, the swinging member can be swung around the fulcrum with a simple structure. Furthermore, the generally conical oscillating member can be oscillated with a simple structure. In addition, by changing the range in which the seated occupant is supported depending on the running conditions of the vehicle, the seated occupant can appropriately perform trunk training exercises. Also, the seated person can exercise appropriately. [Brief description of the drawings]

[0018] [Figure 1] 1 is a perspective view showing a vehicle seat according to an embodiment of the present invention; [Diagram 2] FIG. 4 is a plan view showing a pelvic exercise device and a damper provided on the seat cushion. [Diagram 3] FIG. 4 is a side view showing a pelvic exercise device and a damper provided on the seat cushion. [Figure 4] FIG. 2 is a configuration diagram of components related to the control device. [Diagram 5] FIG. 2 is a functional diagram of a control device. [Figure 6] 11A to 11C are diagrams showing detection targets, pelvic movements, and seat back support states for each vehicle state; [Figure 7] FIG. 13 is a diagram showing a control flow of the operation of the pelvic exercise device. [Figure 8] FIG. 11 is a plan view showing a seat cushion and a pelvic exercise device according to a modified example. [Figure 9] FIG. [Figure 10]FIG. 2 is a plan view showing the seat cushion with the pelvic exercise device removed. [Figure 11] FIG. [Figure 12] FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. [Figure 13] FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. [Figure 14] FIG. 4 is a bottom view of the second support portion and the eccentric shaft portion of the pelvic exercise device. [Figure 15] FIG. 2 is a plan view of the base of the pelvic exercise device. [Figure 16] FIG. 11 is a plan view showing a seat cushion and a pelvic exercise device according to another modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention (the present embodiment) will be described with reference to the drawings. Note that the embodiment described below is merely an example for facilitating understanding of the present invention, and does not limit the present invention. In other words, the present invention can be modified and improved without departing from the spirit of the present invention, and of course, the present invention includes equivalents thereof.

[0020] In the following, a vehicle seat S will be described as an example of the vehicle seat according to the present embodiment. However, the present invention can be applied to vehicles other than vehicles, such as ships, aircraft, industrial machines, etc. Furthermore, the present invention can be applied to seats that have at least a seat portion, such as office chairs, other than vehicle seats. In the following description, the directions of "up and down," "left and right," and "front and back" correspond to "up and down," "left and right," and "front and back" as seen by an occupant H seated in the vehicle seat S.

[0021] <Overall structure> First, the overall configuration of a vehicle seat S according to this embodiment will be outlined mainly with reference to Fig. 1. Fig. 1 is a perspective view showing a vehicle seat S according to one embodiment of the present invention. The vehicle seat S is mainly composed of a seat cushion 1 which is a seat portion that supports the buttocks of an occupant H (see FIG. 6), a seat back 2 which is a backrest, a pelvic exercise device 3 arranged on the seat cushion 1, and an air cell 8 arranged on the seat back 2.

[0022] The seat cushion 1 is mainly composed of a seat frame F shown in FIG. 2, a cushion pad 1a, and a cover 1b that covers the cushion pad 1a and is fixed to the seat frame F. The seat back 2 is attached to the rear end of the seat cushion 1, and similarly to the seat cushion 1, is mainly composed of a seat frame (not shown), a cushion pad 2a, and a cover 2b.

[0023] The pelvic exercise equipment 3, details of which will be described later, is equipment for training the trunk of the seated person H, and a part of its underside is disposed inside the seat cushion 1, and is a rocking member that rocks the pelvic portion of the seated person H while supporting the buttocks of the seated person H. The air cell 8, details of which will be described later, is an extension member and movable support member that inflates (stretches) to press and support the waist area of ​​the seated occupant H, and is arranged in the seat back 2 so as to be able to expand and contract by the actuator 4B.

[0024] <About the pelvic exercise equipment peripherals> The configuration around the pelvic exercise device 3 will be described with reference to Fig. 2 and Fig. 3. Fig. 2 is a plan view showing the pelvic exercise device 3 and the damper 5 provided on the seat cushion 1, and Fig. 3 is a side view thereof. The pelvic exercise device 3 is formed in an approximately conical shape and is composed of a flat portion 3a and a curved portion 3b. As shown in FIG. 2, the flat portion 3a is disposed on the side supporting the seated person H, and is approximately circular in plan view. In this way, by forming the pelvic exercise device 3 into a substantially conical shape, it is possible to ensure a wide surface area that comes into contact with the buttocks of the seated person H, while keeping the space occupied inside the seat cushion 1 small.

[0025] Two grooves 3c are formed on the upper surface of the pelvic exercise device 3 to enlarge the contact surface with the seated person H and stably support the seated person H. These two grooves 3c are formed in a substantially elliptical shape in a plan view, and are formed side by side in the width direction of the vehicle seat S with their longer sides facing in the width direction of the vehicle seat S so as to fit along the lower end of the pelvis of the seated person H.

[0026] The pelvic exercise device 3 is supported so as to be able to tilt (swing) downward in all directions of 360 degrees including the front-back and left-right directions in a horizontal plane with the fulcrum 4s as a reference. Furthermore, the pelvic exercise device 3 is supported by the actuator 4A so as to be able to rotate (swing) clockwise and counterclockwise in the horizontal plane with the fulcrum 4s as a center.

[0027] In other words, the pelvic exercise device 3 tilts in all directions 360 degrees, including forward / backward and left / right, to cause the lumbar region of the seated person H to perform a swing motion, which is a rotational motion about the fulcrum 4s in a vertical plane. Furthermore, the pelvic exercise device 3 rotates clockwise and counterclockwise to cause the lumbar region of the seated person H to perform a twist motion, which is a rotational motion about a vertical axis passing through the fulcrum 4s in a horizontal plane.

[0028] Since the pelvic exercise device 3 is arranged to be able to swing on the seat cushion 1, the seated person H can exercise the trunk while sitting by moving his / her hips voluntarily without operating the actuator 4A. The seated person H can strengthen the transverse abdominal muscles without being too conscious of it while driving the vehicle.

[0029] A damper 5, which is an air cylinder and corresponds to a biasing member, is disposed on the seat cushion 1 as a member for applying a biasing force to the pelvic exercise device 3 to attenuate the rocking speed of the pelvic exercise device 3 in the tilting direction. Specifically, side frames 1d that constitute the seat frame F are provided on both sides of the seat cushion 1 in the seat width direction. Four dampers 5 are attached to the side frames 1d. 2 and 3, the damper 5 is disposed above the fulcrum portion 4s and such that the front side of the damper 5 intersects in the seat width direction with the rear side of the pan frame 1c that constitutes the seat frame F. The dampers 5 also extend radially in all four directions from the central portion of the top and bottom of the pelvic exercise device 3, and are fixed at their ends to the side frames 1d.

[0030] The rocking speed of the pelvic exercise device 3 in the tilting direction can be slowed down by the biasing force applied from the damper 5 to the pelvic exercise device 3. This prevents the seated person H seated on the pelvic exercise device 3 from suddenly losing balance, and the rocking speed of the pelvic exercise device 3 can be made suitable for the exercise of the seated person H. It is preferable to use four dampers 5 since they can apply a well-balanced biasing force to the pelvic exercise device 3 from all sides, but more dampers may be provided. Also, instead of the dampers 5, springs may be used as biasing members for applying a biasing force to the pelvic exercise device 3.

[0031] The pelvic exercise device 3 is supported by the actuator 4A so as to be swingable about a fulcrum 4s of the actuator 4A. This fulcrum 4s is disposed on the lower side of the pelvic exercise device 3, opposite to the upper surface side supporting the seated person H. Specifically, in the pelvic exercise device 3, the lower end side of the curved surface portion 3b on the opposite side to the side where the flat surface portion 3a is located on the side supporting the buttocks of the seated person H is supported so that the pelvic exercise device 3 can swing about the fulcrum 4s. The actuator 4A is driven under the control of a control device 10 (see FIG. 4) described later, and acts on the pelvic exercise device 3, functioning as an acting member for causing the pelvic exercise device 3 to swing.

[0032] <Control configuration> Next, the control configuration of the control device 10 will be described with reference mainly to Fig. 4 and Fig. 5. Fig. 4 is a configuration diagram of parts related to the control device 10, and Fig. 5 is a functional diagram of the control device 10. The vehicle seat S includes a control device 10 as an operating member control device that controls the actuator 4A so that the actuator 4A rocks the pelvic exercise device 3 to intentionally destabilize the support state of the seated person H. Here, the pelvic exercise device 3 is rocked to create an unstable support state so that the seated person H can train his / her trunk by moving to maintain balance.

[0033] The control device 10 is composed of a ROM 10a, a RAM 10b, and a CPU 10c, and operates by receiving power from a power source P such as a battery. The vehicle seat S also includes a displacement sensor 6 as a detection unit that detects the displacement of the four dampers 5. The control device 10 receives a signal transmitted from the displacement sensor 6 and detects the displacement of the four dampers 5, i.e., the rocking state of the pelvic exercise device 3. The vehicle seat S also includes seat weight sensors 11 for measuring the position of the center of gravity of the seated person H on the seat cushion 1. For example, the seat weight sensors 11 are provided in front of and behind the left and right sliding rails provided on the lower part of the vehicle seat S. This makes it possible to measure the position of the center of gravity of the seated person H on the vehicle seat S from the loads measured by the four seat weight sensors 11. The control device 10 swings the pelvic exercise device 3 via the actuator 4A in accordance with the swinging state of the pelvic exercise device 3, based on a program relating to the motion state of the seated person H, which is recorded in a ROM 10a serving as a recording section.

[0034] Specifically, the control device 10 includes a calculation unit 10d that calculates the position of the center of gravity of the seated person H, and a load determination unit 10e that determines whether the load applied to the seated person H is appropriate. The calculation unit 10d calculates the position of the center of gravity of the seated person H from a signal related to the amount of displacement of each damper 5 obtained from the displacement sensor 6. The load determination unit 10e processes the center of gravity position calculated by the calculation unit 10d and the program recorded in the ROM 10a to determine whether the load applied to the seated person H due to the movement caused by the movement of the center of gravity position of the seated person H is appropriate.

[0035] The control device 10 swings the pelvic exercise device 3 by controlling the actuator 4A, and then changes the load applied to the pelvic exercise device 3 from the actuator 4A according to the state of movement related to the amount of movement of the center of gravity and the moving speed calculated by the calculation unit 10d. Specifically, when the load determination unit 10e determines that the pelvic exercise device 3 returns to its original state too quickly, the control device 10 increases the load that acts as a resisting force when the seated person H restores the pelvic exercise device 3 after swinging the pelvic exercise device 3. In particular, the control device 10 controls the actuator 4A so as to increase the load applied to the pelvic exercise device 3 from the actuator 4A when swinging the pelvic exercise device 3.

[0036] In this way, when the load determining unit 10e determines that the load applied to the seated person H is high or low, the control device 10 can adjust the rocking of the pelvic exercise device 3 to adjust the load to an appropriate load. In other words, the load applied to the seated person H from the pelvic exercise device 3 can be effectively adjusted according to the habituation of the seated person H to the swing exercise and twist exercise based on the pelvic exercise device 3.

[0037] The control device 10 also corresponds to a support member control device, and controls the actuator 4B for expanding and contracting the air cell 8. The air cell 8 will be described in detail later. The controller 10 is connected to the accelerator position sensor 7, acceleration sensor 9 and actuator 4B as components related to the control of the air cell 8 by the controller 10, and has an adjustment unit 10f that adjusts the expansion / contraction state of the air cell 8.

[0038] <About Aircel> Next, the control of the air cell 8 will be described with reference to Fig. 6 in addition to Fig. 4 and Fig. 5. Fig. 6 is a diagram showing the detection target, the movement of the pelvis, and the supporting state of the seat back 2 for each state of the vehicle. As described above, the buttocks of the seated person H will swing in conjunction with the swing of the pelvic exercise device 3. However, it may be necessary to limit the swing of the buttocks of the seated person H so that the seated person H can concentrate on driving the vehicle. As such, as a means for limiting the swing of the buttocks of the seated person H, air cells 8 are provided that bulge out from the seat back 2 side and support the waist of the seated person H. The air cell 8 is placed against the waist of the seated occupant H to suppress rocking of the buttocks via the waist, and is disposed in the seat back 2 so as to be inflatable by an actuator 4B formed of a compressor or the like. The control device 10 has an adjustment unit 10f that adjusts the amount of expansion and contraction of the air cell 8 by controlling the actuator 4B.

[0039] It is recognized from the pressure distribution in the vehicle seat S when the vehicle is being driven that the thoracic vertebrae and the sacrum of the spine of the seated person H need to be supported from behind. However, the lumbar vertebrae do not necessarily need to be supported from behind. Therefore, at least when the vehicle is stopped or cruising, the transverse abdominal muscles of the trunk can be trained by rocking the pelvis of the seated person H without supporting the lumbar vertebrae with the air cells 8. In this way, the adjustment unit 10f of the control device 10 controls the actuator 4B to change the position at which the air cells 8 bulge (expand) in accordance with the running state of the vehicle, thereby changing the range in which the air cells 8 support the seated occupant H. As a result, the control device 10 can cause the seated occupant H to perform an appropriate trunk training exercise in accordance with the state of the vehicle. Next, the control of actuator 4B by control device 10 having adjustment unit 10f in each vehicle state will be described.

[0040] (Air cell control when the vehicle is stopped) When the vehicle is stopped, even if the seated person H exercises, it does not affect driving, so there is no need to restrict the rocking motion caused by the pelvic exercise device 3. When the vehicle is stopped, the air cell 8 is in close contact with the actuator 4B and contracted due to control of the actuator 4B by the adjustment unit 10f of the control device 10, and a large space is formed behind the waist of the seated occupant H. At this time, the air cells 8 do not come into contact with the lower back of the seated person H and do not support the lower back, so that the seated person H can perform swing and twist exercises on the pelvic exercise device 3.

[0041] When the vehicle is not stopped, the adjustment unit 10f of the control device 10 releases the contracted state of the air cell 8, that is, controls the actuator 4B to expand the air cell 8 forward of the seat. Specifically, when the control device 10 detects that the accelerator pedal is turned on by a signal from the accelerator position sensor 7, it determines that the vehicle is not stopped and causes the adjustment unit 10f to function as described above.

[0042] (Air cell control during acceleration and deceleration) When the vehicle is accelerating or decelerating, the rocking motion caused by the pelvic exercise device 3 is limited in order to enable stable driving. When the vehicle is accelerating or decelerating, the adjustment unit 10f of the control device 10 controls the actuator 4B, so that the air cell 8 is inflated from the actuator 4B and is placed against the waist of the seated occupant H. At this time, by applying the air cell 8 to the lower back of the seated person H, both the swinging motion and the twisting motion of the seated person H on the pelvic exercise device 3 are restricted.

[0043] When the adjustment section 10f of the control device 10 determines based on a signal from the acceleration sensor 9 that the vehicle is accelerating or decelerating above a predetermined speed, it controls the actuator 4B to cause the air cell 8 to bulge (extend) forward of the seat.

[0044] (Air cell control during cruising) When the vehicle is cruising (driving at a substantially constant speed), the rocking motion caused by the pelvic exercise device 3 is restricted to a certain degree in order to enable stable driving while allowing the seated person H to exercise. In a cruising state, the air cell 8 is inflated from the actuator 4B by an amount smaller than the amount of inflation during acceleration and deceleration, due to control of the actuator 4B by the adjustment unit 10f of the control device 10. The position of the air cell 8 in this state is a position where the seated occupant H will come into contact with the air cell 8 when attempting to move in the twisting direction, and is between the position of the air cell 8 when the vehicle is stopped and the position of the air cell 8 when accelerating or decelerating. In other words, when the seated person H tries to move in a twisting direction, he / she hits the air cell 8, so that the twisting movement of the seated person H on the pelvic exercise device 3 is restricted, and only the swinging movement is possible.

[0045] When the adjustment section 10f of the control device 10 determines based on signals from the acceleration sensor 9 and the displacement sensor 6 that the vehicle is traveling within a predetermined range of speed change, it controls the actuator 4B to cause the air cell 8 to bulge (extend) a predetermined amount forward of the seat.

[0046] Furthermore, the control device 10 may control the actuator 4A to swing the pelvic exercise device 3 depending on whether the vehicle is stopped, accelerating or decelerating, or cruising. Specifically, the control device 10 controls the actuator 4A so that the pelvic exercise device 3 swings widely when the vehicle is stopped, causing the seated person H to perform twisting and swinging movements. Also, when the vehicle is accelerating or decelerating, the control device 10 controls the actuator 4A so that the pelvic exercise device 3 does not swing and the seated person H does not perform twisting and swinging movements. Furthermore, when the vehicle is cruising, the control device 10 controls the actuator 4A so that the pelvic exercise device 3 swings slightly, causing the seated person H to perform swinging movements. In this way, the seated person H can not only move his / her lower back by himself / herself in accordance with the traveling state of the vehicle, but also can change the rocking state by the pelvic exercise device 3, thereby automatically exercising.

[0047] A locking mechanism (not shown) for limiting the rocking of the pelvic exercise device 3 may be provided so that the pelvic exercise device 3 can be securely fixed to the seat cushion 1 when the seated person H does not need to exercise. The pelvic exercise device 3 may also be made detachable from the seat cushion 1. In this way, when the seated person H wants to rest without training his / her trunk, the pelvic exercise device 3 can be removed, allowing him / her to sit comfortably according to his / her mood.

[0048] Here, a control flow of the operation of the pelvic exercise device 3 by the control device 10 will be described with reference to FIG. As shown in FIG. 7, if the center of gravity position of the seated occupant H measured by the seat weight sensor 11 is within a predetermined range (S1: Yes), that is, if the seated posture of the seated occupant H is normal, the control device 10 proceeds to processing of S2.

[0049] In S2, if the acceleration of the vehicle is 0 (S2: Yes), that is, if the vehicle is not accelerating, the control device 10 proceeds to the process of S3.

[0050] In S3, if the speed of the vehicle is 0 (S3: Yes), that is, if the vehicle is stopped, the control device 10 operates the pelvic exercise device 3 in the twist mode (S4). The twist mode is a mode in which the "twist swing" operation in FIG. 6 is performed.

[0051] If the conditions for canceling operation are not met (S5: No), the control device 10 continues operation in twist mode, and if the conditions for canceling operation are met (S5: Yes), it stops the operation of the pelvic exercise equipment 3 (S6). The above-mentioned condition for canceling the operation is that any one of the conditions S1, S2, and S3 is determined to be No.

[0052] Furthermore, in S1, if the position of the center of gravity of the seated person H measured by the seat weight sensor 11 is not within a predetermined range (S1: No), the control device 10 stops the operation of the pelvic exercise device 3 (S6). Note that if the operation of the pelvic exercise device 3 has already been stopped, this state is maintained.

[0053] Furthermore, in S2, if the acceleration of the vehicle is not 0 (S2: No), that is, if the vehicle is accelerating, the control device 10 stops the operation of the pelvic exercise device 3 (S6).

[0054] Furthermore, in S3, if the vehicle speed is not 0 (S3: No), that is, if the vehicle is cruising at a constant speed, the control device 10 operates the pelvic exercise device 3 in the swing mode (S7). The swing mode is a mode in which the "swing" motion in FIG. 6 is executed.

[0055] If the conditions for canceling the operation are not met (S8: No), the control device 10 continues operation in twist mode, and if the conditions for canceling the operation are met (S8: Yes), it stops the operation of the pelvic exercise equipment 3 (S6). The above-mentioned condition for canceling the operation is that any one of the conditions S1, S2, and S3 is determined to be No.

[0056] Then, if the control device 10 does not want to end the processing of the pelvic exercise device 3 (S9: No), that is, if the training processing using the pelvic exercise device 3 is to be continued, the control device 10 returns to S1, and if the processing is to be ended (S9: Yes), the control device 10 ends the processing.

[0057] <Other configurations> In the above embodiment, an example was described in which the pelvic exercise device 3 was provided in a vehicle seat S, but it may also be provided in a vehicle seat such as a ship, aircraft, industrial machine, etc., and further, it may be provided in a seat including an office chair, etc.

[0058] In the above embodiment, the pelvic exercise device 3 has been described as being supported by the actuator 4A so as to be tiltable downward in all directions 360 degrees with the fulcrum 4s as a reference, and to be rotatable clockwise and counterclockwise within a horizontal plane with the fulcrum 4s as a reference. Although such a configuration is suitable for evenly exercising various muscles constituting the trunk of the seated person H, the rocking member according to the present invention is not limited to such a configuration. For example, the rocking member may be supported by the actuator 4A so as to be tiltable only in one direction and the opposite direction to the one direction, that is, within a virtual plane.

[0059] Furthermore, the oscillating member may only have a tilting function and eliminate the clockwise and counterclockwise rotation function in a horizontal plane, or may only have a clockwise and counterclockwise rotation function and eliminate the tilting function. In this way, by limiting the rocking of the rocking member, the stability of supporting the seated person H can be increased.

[0060] In addition, the fulcrum portion 4s, which is the fulcrum for the oscillation of the pelvic exercise device 3, has been described as being provided on the actuator 4A, but is not limited to such a configuration, and a part of any of the members constituting the pan frame 1c or other members of the seat cushion 1 may be used as the fulcrum portion.

[0061] Also, the vehicle seat S according to the above embodiment has been described as being equipped with the actuator 4A that rocks the pelvic exercise device 3 and the control device 10. The vehicle seat S is suitable in that the actuator 4A and the control device 10 can intentionally disrupt the posture of the seated person H based on the pelvis and cause trunk movement to correct the posture. However, the present invention may not be equipped with the actuator 4A and the control device 10, and the pelvic exercise device 3 may be rocked by the spontaneous movement of the seated person H. In this way, costs can be reduced by the amount that the actuator 4A and the control device 10 are not provided.

[0062] In addition, in the vehicle seat S according to the above embodiment, the pelvic exercise device 3 is disposed on the seat cushion 1, but the present invention is not limited to such a configuration, and the pelvic exercise device 3 may be disposed on the seat back 2. Specifically, the pelvic exercise device 3 may be disposed on the front side of the seat back 2 and support the waist of the seated person H from the rear side so that the waist can be rocked.

[0063] The vehicle seat S is provided with the air cell 8 and the actuator 4B, and is therefore capable of changing the support state of the seated occupant H according to each driving state. However, in cases where the vehicle seat S is never in a driving state and adjustment of the support state of the seated occupant H is not required, for example, in a seat such as an office chair, the vehicle seat S does not need to be provided with the air cell 8 and the actuator 4B. Although the pelvic exercise device 3 is formed in a substantially conical shape, it may be formed in a substantially spherical shape.

[0064] In addition, the member that extends to support the waist of the seated occupant H is not limited to the air cell 8, but may be any member that has a plate-shaped support member and can move in the fore-and-aft direction, and is configured to expand and contract in the fore-and-aft direction and come into contact with the waist of the seated occupant H when extended, such as a lumbar support.

[0065] (Modification of the vehicle seat S) Next, modified examples of the vehicle seat S will be described with reference to Fig. 8 to Fig. 16. Note that the modified examples of the vehicle seat S differ from the above embodiment in the configurations of the seat cushion 21 and the pelvic exercise device 23, and therefore the following description will focus on the seat cushion 21 and the pelvic exercise device 23.

[0066] As shown in Fig. 8, a pelvic exercise device 23 is attached to the upper part of a seat cushion 21 of a vehicle seat S. Here, a seated person H sits on the pelvic exercise device 23. In other words, the hip point HP of the seated person H is positioned on the pelvic exercise device 23.

[0067] 8, the size of the pelvic exercise device 23 is such that the distance from the hip point HP to the front end is L1, the distance to the rear end is L2, the distance to the right end is W1, and the distance to the left end is W2. Note that the above L1, L2, W1, and W2 may be determined based on a three-dimensional human body model of a predetermined standard. Specifically, as an example, L1 is 184 mm, L2 is 130 mm, W1 is 205 mm, and W2 is 205 mm. The left and right ends of the pelvic exercise device 23 are positioned so as to overlap the side portions 21A of the seat cushion 21 in the up-down direction.

[0068] Fig. 9 shows a seat cushion frame 30 that forms the framework of the seat cushion 21. As shown in Fig. 10, the seat cushion frame 30 includes a pair of side frames 31 arranged on the left and right in the seat width direction, a pipe frame 33, a first pan frame 32, and a second pan frame 34.

[0069] The side frames 31 are plate-shaped metal members extending in the front-rear direction of the seat. A first pan frame 32 is installed on the front ends of the left and right side frames 31, and a pipe frame 33 is attached to the rear ends of the left and right side frames 31. As a result, the seat cushion frame 30 forms a substantially rectangular frame-shaped body when viewed from above.

[0070] Then, the second pan frame 34 is attached so as to span the rear portion 32A of the first pan frame 32 and the pipe frame 33. The second pan frame 34 is a metal plate-like body formed so that the center portion in the front-rear direction of the seat is sunken downward. As shown in FIG. 9, the second pan frame 34 has a rear mounting portion 34A, an inclined portion 34B, a pelvic exercise device mounting portion 34C, an inclined portion 34D, and a front mounting portion 34E.

[0071] The rear mounting portion 34A abuts against the pipe frame 33 and is attached to the pipe frame 33. Mounting holes 36 are formed in the rear mounting portion 34A, and fasteners such as screws are passed through the mounting holes 36 to fix the pipe frame 33 and the rear mounting portion 34A. The rear mounting portion 34A is located above the pipe frame 33.

[0072] The inclined portion 34B is a connection portion between the rear mounting portion 34A and the pelvic exercise device mounting portion 34C. Here, the inclined portion 34B is inclined downward from the rear to the front.

[0073] The pelvic exercise device mounting portion 34C is a portion for mounting the pelvic exercise device 23. The pelvic exercise device mounting portion 34C is located lower than the first pan frame 32 and the pipe frame 33. This allows a larger installation space for the pelvic exercise device 23. Furthermore, the pelvic exercise device mounting portion 34C has mounting holes 35 formed on the left and right sides, and fasteners such as screws are passed through the mounting holes 35 to fix the pelvic exercise device 23 to the pelvic exercise device mounting portion 34C.

[0074] The inclined portion 34D is a connection portion between the pelvic exercise device attachment portion 34C and the front attachment portion 34E. Here, the inclined portion 34D is inclined upward from the rear to the front.

[0075] The front mounting part 34E abuts against the rear part 32A of the first pan frame 32 and is attached to the first pan frame 32. Mounting holes 37 are formed in the front mounting part 34E, and fasteners such as screws are passed through the mounting holes 37 to fix the first pan frame 32 and the front mounting part 34E. The front mounting portion 34E is located above the rear portion 32A of the first pan frame 32.

[0076] As shown in FIG. 10, the seat cushion 21 of the vehicle seat S has an opening 21B formed in the center located between the left and right side portions 21A. A pelvic exercise device mounting portion 34C of the second pan frame 34 is exposed from the opening 21B, and the pelvic exercise device 23 is mounted to the pelvic exercise device mounting portion 34C. Furthermore, an opening cover part 21C is attached to the front end of the opening 21B, and when the pelvic exercise device 23 is removed, the opening 21B can be covered by the opening cover part 21C.

[0077] Next, the configuration of the pelvic exercise device 23 will be described with reference to FIGS. As shown in FIG. 11, the top surface of the pelvic exercise device 23 is configured in a substantially pentagonal shape. As shown in FIG. 12, the pelvic exercise device 23 mainly comprises a cover 40, an upper cushion material 41, a lower cushion material 42, a first support portion 43, a second support portion 44, an eccentric shaft portion 45, a base portion 46, and a motor 47.

[0078] The seat portion provided at the upper part of the pelvic exercise device 23 is composed of a cover 40, an upper cushion material 41, a lower cushion material 42, and a first support portion 43. Specifically, as shown in Figures 12 and 13, a lower cushion material 42 is placed on a first support portion 43, an upper cushion material 41 is placed on the lower cushion material 42, and these are covered with a cover 40 to form the above-mentioned seat portion.

[0079] The first support portion 43 is, for example, a resin plate, and is formed in substantially the same shape as the top surface of the pelvic exercise device . 11 and 12, two recesses 43A are formed on the left and right sides in the center of the first support portion 43. The recesses 43A are portions that face the ischial tuberosities of a seated person H.

[0080] The lower cushion material 42 is a harder cushion material than the upper cushion material 41. A hole is formed in the lower cushion material 42 at a position facing the recessed portion 43A, and the downward protruding portion 41A of the upper cushion material 41 fits into this hole.

[0081] The upper cushion material 41 is disposed on the lower cushion material 42 and is a cushion material softer than the lower cushion material 42. As described above, the upper cushion material 41 has a downward protruding portion 41A that protrudes downward in a portion facing the recessed portion 43A, and the downward protruding portion 41A abuts against the recessed portion 43A through a hole formed in the lower cushion material 42. By providing the downward protruding portion 41A on the upper cushion material 41 in this manner, the cushioning effect on the ischial tuberosity can be increased, improving the seating comfort.

[0082] The skin 40 is, for example, cloth or leather. The skin 40 may be made of the same material as the skin of the seat cushion 21, or a different material may be used.

[0083] Next, we will explain the configuration of the lower part of the pelvic exercise device 23. The lower part of the pelvic exercise device 23 mainly includes a base 46, a motor 47, an eccentric shaft part 45, and a second support part 44.

[0084] As shown in FIGS. 12 and 15, the base 46 has a base plate portion 46A, a first end holding portion 46B, a second end holding portion 46C, a boss 48, and a screw shaft 49. A motor 47 is attached to the base plate portion 46A, and power is transmitted so that a screw shaft 49 rotates in response to the driving of the motor 47. In addition, a plurality of bosses 48 are formed on the left and right sides of the base 46. The bosses 48 are disposed in positions facing the mounting holes 35 of the second pan frame 34, and the base 46 and the second pan frame 34 are fixed together using a fastener such as a screw that passes through the central opening of the bosses 48.

[0085] As shown in FIG. 12, the second support portion 44 and the eccentric shaft portion 45 are disposed on the base portion 46 . 12 and 14, the eccentric shaft portion 45 has a structure in which the center of gravity (center of mass) is away from the center of rigidity (center of rigidity). Specifically, the eccentric shaft portion 45 has a cylindrical first end portion 45A, a gear 45B that engages with the screw shaft 49, a cylindrical second end portion 45C, and an eccentric shaft 45D that passes through the first end portion 45A, the gear 45B, and the second end portion 45C. The first end 45A is held by a first end holding portion 46B of the base 46, and the second end 45C is held by a second end holding portion 46C of the base 46.

[0086] Also, as shown in Figures 12 and 14, the second support portion 44 includes a plate portion 44A that supports the first support portion 43, and an eccentric shaft holding portion 44B and an end holding portion 44C formed on the underside of the plate portion 44A. The plate portion 44A is slightly curved and configured to have a size sufficient to cover the left and right recesses 43A of the first support portion 43. The eccentric shaft holding portion 44B protrudes downward from the center portion of the plate portion 44A, and has a through hole through which the eccentric shaft 45D of the eccentric shaft portion 45 passes. The first end 45A of the eccentric shaft portion 45 is held by the end holding portion 44C of the second support portion 44.

[0087] When the screw shaft 49 rotates by being driven by the motor 47, the gear 45B rotates in response to the rotation of the screw shaft 49, and the eccentric shaft 45D rotates. As described above, in the eccentric shaft portion 45, the center of gravity (center of mass) of the structure is separated from the center of rigidity (center of rigidity). Therefore, in response to the rotation of the eccentric shaft 45D, the second support portion 44 connected to the eccentric shaft 45D performs an eccentric motion (twist, swing). In addition, by the second support portion 44 performing the above-mentioned eccentric movement, the seat portion (skin 40, upper cushion material 41, lower cushion material 42, first support portion 43) of the pelvic exercise device 23 supported by the second support portion 44 can be made to perform eccentric movement.

[0088] Furthermore, the shape of the top surface of the pelvic exercise device 23 is not limited to the example shown in Fig. 8. For example, the shape of the top surface, particularly the front side, may be configured to be arcuate, as in the pelvic exercise device 123 shown in Fig. 16. By configuring it in this way, when the operation of the pelvic exercise device 123 is stopped, the shape of the front part can be prevented from changing regardless of the orientation of the pelvic exercise device 123. [Explanation of symbols]

[0089] 1 Seat cushion (seat) 1a Cushion pad 1b Epidermis 1c Pan Frame 1d Side frame 2 Seat back 2a Cushion pad 2b Epidermis 3 Pelvic exercise equipment (oscillating member) 3a Plane part 3b Curved part 3c groove 4A Actuator (acting member) 4B Actuator 4s fulcrum part 5 Damper (biasing member) 6 Displacement sensor (detection part) 7 Accelerator Position Sensor 8 Air cell (movable support member, pressing member) 9. Acceleration Sensor 10 Control device (working member control device, supporting member control device) 10a ROM (recording section) 10b RAM 10c CPU 10d Arithmetic unit 10e Load judgment section 10f adjustment part 11 Seat weight sensor 21 Seat cushion 21A Side 21B opening 21C Opening cover 23 Pelvic exercise equipment (swinging member) 30 Seat cushion frame 31 Side frame 32 1st Pan Frame 32A Rear 33 Pipe Frame 34 2nd Pan Frame 34A Rear mounting part 34B Slope 34C Pelvic exercise device attachment part 34D Slope 34E Front mounting part 35 Mounting hole 36 Mounting hole 37 Mounting hole 40 Epidermis 41 Upper cushioning material 41A Downward protrusion 42 Lower cushioning material 43 1st support part 43A Recess 44 Second support part 44A Plate section 44B Eccentric shaft holder 44C End retainer 45 Eccentric shaft part 45A 1st end 45B Gear 45C 2nd end 45D eccentric shaft 46 Base 46A Base plate part 46B First end holding part 46C Second end holding part 47 Motor 48 Boss 49 Screw shaft 123 Pelvic exercise equipment (oscillating member) Seat frame, front H. Seat P power supply S Vehicle seat (seat) HP Hip Point

Claims

1. A seat having at least a seat portion where a seated person sits, A rocking member is provided on the seat portion so as to be rockable while supporting the seated person, The rocking member is supported by a part of the seat so as to be rockable in at least one direction and in a direction opposite to the one direction, based on a portion on the opposite side of the side supporting the seated occupant; The rocking member has a planar portion that supports the seated occupant and a side portion, A biasing member is disposed below the planar portion of the swinging member, The seat is characterized in that the biasing member is fixed to a side portion of the pivoting member.

2. A seat as described in claim 1, characterized in that the biasing member extends from a side portion of the oscillating member in a direction perpendicular to the up-down direction of the seat.

3. A sheet as described in claim 1 or 2, characterized in that the biasing member extends from the upper and lower central portions of the oscillating member.

4. The seat portion includes a seat cushion frame, and the seat cushion frame has side frames arranged on the left and right sides in the seat width direction, 4. The seat according to claim 3, wherein the biasing member is fixed to the side frame at an end where the biasing member extends from a central portion of the pivoting member from above and below.

5. A sheet as described in claim 4, characterized in that the biasing members extend radially in all four directions from the central upper and lower portions of the oscillating member.

6. A seat as described in any one of claims 1 to 5, characterized in that two grooves are formed in the planar portion of the oscillating member for supporting the occupant.

7. A sheet as described in Claim 6, characterized in that each of the two grooves is formed into an approximately elliptical shape when viewed in a plane.

8. A sheet as described in Claim 7, characterized in that the shape of the two grooves in a planar view is such that the length in the sheet width direction is longer than the length in the sheet front-to-rear direction.

9. A seat as described in any one of claims 7 or 8, characterized in that the groove is formed to follow the lower end of the occupant's pelvis.

10. A sheet as described in any one of claims 6 to 9, characterized in that the biasing member is arranged at a position that does not overlap with the groove when viewed in the sheet width direction.

Images