Abstract: Provided is a technique for more accurately ascertaining a person's status. In particular, the present invention makes it possible to accurately ascertain the detection of alcohol or the like. A fluctuation waveform of an ultra-low-frequency band is found from a biosignal collected from a biosignal measuring means, the fluctuation waveform is plotted as coordinate points on a four-quadrant coordinate system on the basis of a predetermined standard, and biological status is estimated on the basis of temporal change in the coordinate points. According to the method of the present invention for plotting a fluctuation waveform as coordinate points on a four-quadrant coordinate system on the basis of the predetermined standard, change in the fluctuation waveform of the ultra-low-frequency band can be expanded or highlighted and thus perceived, and therefore the present invention is adapted for more accurately perceiving change in a person's status.

Abstract: A structural material is provided, the strength and toughness of which are well-balanced at a high level, suitable in particular for seat frames in automobiles, aircrafts and the like. Specifically disclosed is a structural material produced by integrally joining thin steel members in a part thereof and, after joining, thermally heating a part thereof so that the heat-treated part differs from the other parts in strength and toughness. Unlike a structural material, the strength of which as a whole has been uniformly improved by heat treatment, the above-described structural material consists of a part having a high strength and a part having low strength. Thus, a structural material, the strength and toughness of which are well-balanced at a high level can be obtained. Since the strength and toughness are well-balanced at a high level, the structural material is suitable particularly for seat frames in automobiles, aircrafts and the like.

Abstract: A base net for a back is formed from a three-dimensional stereoscopic knit, and has a configuration in which seams for bringing a pair of ground knitted fabrics thereof to close to each other in a thickness direction are partially provided, predetermined preliminary compression is applied in the thickness direction by the seams, and thereby residual stress is generated in a surface direction (stretching direction). Therefore, stiffness is partially increased by partial improvement in residual stress, and consequently a human body with extreme roughness is supported by nearly uniform pressure. Thus, in spite of a simple configuration in which the seams are provided in desired regions, posture supportiveness and body pressure dispersiveness can be improved. Further, by arbitrarily adjusting the formation positions of the seams, the pressure distribution is adjusted, thereby making it possible to easily control the vibration mode to desired setting, and easily improve vibration absorbency.

Abstract: A predetermined component such as a recliner is attached to a long member in advance, and thereafter by bending the long member, a pair of side frames and an upper frame are integrally formed. Therefore, the recliner can be attached to the long member not bent yet and thus in a substantially flat state, and in addition, the pair of side frames and the upper frame can be integrally formed, which does not require labor and contributes to a reduction in manufacturing cost. Moreover, by adjusting a position where the bending is performed, it is possible to manufacture seat frame structures different in dimension even if the long members not bent yet have the same length, and from this viewpoint as well, it is possible to reduce labor and manufacturing cost.

Abstract: An electromagnetic shielding method includes the steps of disposing a flexible electromagnetic shielding film including a laminate of at least an insulating layer and a conductive metal layer to cover a portion to be electromagnetically shielded on a printed wiring board so that the insulating layer faces the printed wiring board, the conductive metal layer having a higher melting temperature than that of the insulating resin layer; and heating the electromagnetic shielding film to a temperature to melt and contract the insulating layer, thereby bonding the conductive metal layer to a grounding conductor of the printed wiring board and electrically connecting the conductive metal layer to the grounding conductor. The heating temperature is higher than the melting temperature of the insulating layer and lower than the melting temperature of the conductive metal layer.

Abstract: To provide a technique suitable for elevating strength and toughness of a thin low-carbon steel. By performing rapid heating and rapid cooling to a thin low-carbon steel which is an ordinary steel with a thickness of 1.2 mm or less, a steel where a microstructure becomes a duplex grain size structure mixed with crystal grains having different grain diameters, which is not homogeneous, preferably, hard phase structures are contained in addition to the duplex grain size structure is obtained, and a high-strength and high-toughness thin low-carbon steel is obtained. Further, by performing a heat treatment process involving rapid heating and rapid cooling multiple times, a duplex grain size structure of crystal grains with smaller grain diameters or a hard phase structure contained therein is obtained, so that a thin low-carbon steel with higher strength and higher toughness is obtained.

Abstract: A cushion member includes an intermediate layer, and an upper layer and lower layer stacked and fixed thereto. The cushion member is fixed to a frame by bending an end part of the cushion member so that the upper layer comes to the front side and the lower layer comes to the back side. The intermediate layer is subjected to shear force and the upper layer and the lower layer are subjected to compressive and tensile stress. With the spring characteristic of the intermediate layer, residual stress of the tension and compression is applied to the upper and lower layers from the intermediate layer. Thus, the cushion member can have a restoring property, generation of creases during no load application can be reduced, permanent setting is made less likely, and a compression characteristic in the thickness direction is increased.

Abstract: A state change of a person is captured with timing closer to consciousness of the person. A frequency slope waveform of a time series signal of a pulse wave of a body of a person detected by an air pack is obtained by a frequency slope time-series analyzing and a computing device and a frequency fluctuation time-series waveform is obtained by a frequency fluctuation time-series analyzing and computing device. By comparing changes of two waveforms with each other in a waveform determining device, a state change of a person can be captured with timing closer to consciousness of the person.

Abstract: To achieve further weight reduction and thinning of a seat structure. A configuration in which a side frame cover 212 composed of a laminated body 1 provided with a planar member made of cloth and planar members made of synthetic resin laminated on both sides of the planar member made of cloth via adhesive agent and formed in a predetermined shape is joined to a side frame base body 211 composed of a metal member is obtained. Therefore, the thickness of the metal member used can be reduced by an amount corresponding to a strength the laminated body compensates for, which results in achievement of further weight reduction from a conventional structural member composed of only metal members that are used at the same site. Further, when an impact force is applied, the impact force can be consumed as a force that causes delamination of the laminated body from the metal member at a portion where they are joined via the adhesive agent.

Abstract: A seat has a configuration in which, in each side frame of a cushion frame, an inner frame and an outer frame which have flanges extending along peripheral edges thereof are faced to each other with a space therebetween at least partially, and the flanges are fixed by hemming process along the entire peripheral edges thereof. Since the entire peripheral edges are hemmed, the inner frame and the outer frame are securely fixed. Additionally, since the inner frame and the outer frame which are thin-plate-shaped are used, reduction in weight of each side frame can be achieved. Further, since the inner frame and the outer frame are faced to each other with a space therebetween at least partially, a compressive/tensile strength required as a side frame can be secured by inserting an expanded bead body into the space.

Abstract: A technique for grasping a state of a human being. The technique determines a time-series waveform of a frequency from a time-series waveform of a biological signal acquired from an upper body of a human being, and determines time-series waveforms of a frequency slope and frequency variation to analyze these frequencies. Upon analyzing the frequencies, it determines power spectrums of frequencies corresponding to a preset functional adjustment signal, fatigue reception signal, and activity adjustment signal, and then determines a state of the human being from a time-series change in each power spectrum. Dominant degrees of the functional adjustment signal and activity adjustment signal are compared as distribution rates thereof, in addition to a degree of progress of fatigue, to determine a state of the human being, for example a relaxed state, fatigued state, prominent state of sympathetic nervous, prominent state of parasympathetic nervous.

Abstract: An electromagnetic shielding method includes the steps of disposing a flexible electromagnetic shielding film including a laminate of at least an insulating layer and a conductive metal layer to cover a portion to be electromagnetically shielded on a printed wiring board so that the insulating layer faces the printed wiring board, the conductive metal layer having a higher melting temperature than that of the insulating resin layer; and heating the electromagnetic shielding film to a temperature to melt and contract the insulating layer, thereby bonding the conductive metal layer to a grounding conductor of the printed wiring board and electrically connecting the conductive metal layer to the grounding conductor. The heating temperature is higher than the melting temperature of the insulating layer and lower than the melting temperature of the conductive metal layer.

Abstract: A biological signal with small amplitude is detected with greater sensitivity than before. A mechanical amplification device provided with a three-dimensional knitted material 10 and plate-shaped foam bodies 21 and 22 laminated in the periphery of the three-dimensional knitted material, preferably a mechanical amplification device provided with a film 16 disposed between the three-dimensional knitted material 10 and the plate-shaped foam bodies 21 and 22 is provided, and a vibration sensor 30 is attached to this mechanical amplification device. Micro vibration on the body surface caused by a human biological signal such as heart rate, respiration, atrial and aortic vibrations and the like is propagated to the plate-shaped foam bodies 21 and 22, the film 16, and the three-dimensional knitted material 10, and membrane vibration is generated in the plate-shaped foam bodies 21 and 22 and the film 16, while string vibration of a fiber is generated in the three-dimensional knitted material 10.

Abstract: To achieve further weight reduction and thinning of a seat structure. A laminated body obtained by sandwiching a planar member 4 made of cloth between planar members 2 and 3 made of synthetic resin to join them to one another via adhesive agent is used in a shell type frame member of the seat structure. Upon receipt of an impact, delamination is caused between the respective layers configuring the laminated body. Thereby, both the tensile stress and the Izod impact strength of the laminated body are lowered as compared with those of a homogeneous laminated body obtained by joining planer members made of homogeneous materials. That is, impact energy is converted to a force causing delamination between the planar members in the laminated body to be consumed, thereby absorbing the impact energy. Since the shell type frame member itself can absorb the impact, further weight reduction and thinning of the shell type frame member and a seat structure using the same can be achieved.

Abstract: A technology to grasp a state of a human being more accurately is provided. The technology is provided with means for acquiring a time-series waveform of a frequency from a time-series waveform of a biological signal sampled from the upper body of a human being and for further acquiring a time-series waveform of frequency slope and a time-series waveform of frequency fluctuation and for applying frequency analysis to them. In the frequency analysis, a power spectrum of each frequency corresponding to a functional adjustment signal, a fatigue reception signal, and an activity adjustment signal, respectively, determined in advance is acquired. Then, a state of a human being is determined from a time-series change of each power spectrum.

Abstract: An electromagnetic shielding method includes the steps of disposing a flexible electromagnetic shielding film including a laminate of at least an insulating layer and a conductive metal layer to cover a portion to be electromagnetically shielded on a printed wiring board so that the insulating layer faces the printed wiring board, the conductive metal layer having a higher melting temperature than that of the insulating resin layer; and heating the electromagnetic shielding film to a temperature to melt and contract the insulating layer, thereby bonding the conductive metal layer to a grounding conductor of the printed wiring board and electrically connecting the conductive metal layer to the grounding conductor. The heating temperature is higher than the melting temperature of the insulating layer and lower than the melting temperature of the conductive metal layer.

Abstract: A biological body state estimation device configured such that a homeostatic function level is sorted and acquired in plural stages by using a biological signal obtained from an upper body of a person and each stage of the homeostatic function level is plotted in time series in accordance with a time axis indicated on the lateral axis and displayed as a graph by a display. A highest part on the vertical axis of the graph can be displayed as a highly active state and a lowest part as a function decline state. Therefore, a state of fluctuation due to autonomous nerves as an attempt to maintain homeostasis, progress of a feeling of fatigue, and a state stimulated by activation of the brain can be captured as a periodic function. Moreover, a sleep prediction phenomenon can be captured.

Abstract: A cushion structure that does not cause pain to a user when seated and that promotes steady breathing. Three dimensional knit fabrics are formed as a laminate of plural stacked layers, and a minimal-layer structure section, which does not possess at least even a single intermediate layer between the topmost layer and the bottommost layer, is provided on the approximate center section in the width direction in a prescribed width and in a prescribed length from front to back. The approximate center section in the width direction of the cushion structure is the region upon which the area around the sacrum is positioned when the user is seated.

Abstract: There are provided a bio-signal analyzer using a sensor capable of detecting, even though it is non-invasive, a more prominent bio-signal, and a seat using the bio-signal analyzer. Air cushions (10), which are sensors detecting a bio-signal in a non-invasive manner, are disposed at the positions corresponding respectively to left and right iliocostalis lumborum muscles of a person, in a substantially vertically long state along the iliocostalis lumborum muscles, with upper ends thereof being set at least at the height corresponding to a lower face of a human diaphragm. In the diaphragm, bio-signals such as heartbeats, breaths, or pulsations of aorta passing through the vicinity of the diaphragm are resonated and amplified. Further, the iliocostalis lumborum muscles are at positions where they are easily vibrated by pulsations of aorta passing through the vicinity of the lumbar region.

Abstract: Determination about presence/absence of alcohol in the body is made accurately. A frequency dynamic information processing means 610 which obtains a tendency of time-series fluctuation regarding a frequency of a pulse wave of a back portion of a person detected by an air pack and an alcohol-drinking determining means 650 which determines an alcohol-drinking state when a tendency of a time-series fluctuation regarding the frequency obtained by the frequency dynamic information processing means 610 is separated from a tendency of time-series fluctuation regarding the frequency at a non-drinking state are provided.