Abstract: Disclosed is an optical device which includes: an optical component configured to be electrically actuated such that a light transmission state is variable; a driver circuit for the optical component; a power source unit for driving the optical component; a rim for supporting the optical component; a temple having front and rear ends and connected at the front end to the rim; and an earpiece formed at the rear end of the temple. The power source unit includes a secondary battery, a power switch, a power switch control portion, and a use-status sensing portion for sensing the status of use by a user of the optical device. The power switch control portion performs control to turn off the power switch when the use-status sensing portion does not sense any use by the user of the optical device.

Abstract: A stereoscopic image viewing device to be attached for stereoscopic image viewing to eyeglasses; which includes: a pair of light shutters for right and left eyes; a driver circuit for the light shutters; a power source unit for driving the light shutters; a bridge for supporting the light shutters at their inside edges; a binding portion for removably binding the stereoscopic image viewing device to the eyeglasses; and a support for supporting the driver circuit and the power source unit. The power source unit includes a secondary battery. The binding portion and the support are integrally formed with the bridge. The stereoscopic image viewing device has a center of gravity positioned in the bridge.

Abstract: A stereoscopic image viewing device to be attached for stereoscopic image viewing to eyeglasses, which includes: a pair of light shutters for right and left eyes; a driver circuit for the light shutters; a power source unit for driving the light shutters; a support for supporting the light shutters; and a first binding portion for removably binding the stereoscopic image viewing device to the eyeglasses, the first binding portion being integrally formed with the support. The power source unit and the driver circuit are connected to the support by a flexible connecting member without being fixed to the light shutters.

Abstract: Disclosed is an alloy powder for electrodes for nickel-metal hydride storage batteries having a high battery capacity and being excellent in life characteristics and high-temperature storage characteristics. The alloy powder includes a hydrogen storage alloy containing elements L, M, Ni, Co, and E. L includes La as an essential component. L includes no Nd, or when including Nd, the percentage of Nd in L is less than 5 mass %. The percentage of La in the hydrogen storage alloy is 23 mass % or less. M is Mg, Ca, Sr and/or Ba. A molar ratio ? to a total of L and M is 0.045???0.133. A molar ratio x of Ni to the total of L and M is 3.5?x?4.32, and a molar ratio y of Co is 0.13?y?0.5. The molar ratios x and y, and a molar ratio z of E to the total of L and M satisfy 4.78?x+y+z<5.03.

Abstract: Disclosed is an optical device which includes: an optical component configured to be electrically actuated such that a light transmission state is variable; a driver circuit for the optical component; a power source unit for driving the optical component; a rim for supporting the optical component; a temple having front and rear ends and connected at the front end to the rim; and an earpiece formed at the rear end of the temple. The power source unit includes a secondary battery, a power switch, a power switch control portion, and a use-status sensing portion for sensing the status of use by a user of the optical device. The power switch control portion performs control to turn off the power switch when the use-status sensing portion does not sense any use by the user of the optical device.

Abstract: An alkaline storage battery includes: a cylindrical case having a side wall including an opening end portion and a bottom; a sealing plate; a gasket interposed between the sealing plate and the opening end portion; and a sealant between the gasket and the opening end portion. The side wall has an annular groove opened at an outer surface thereof, and an inwardly curl portion at the opening end portion. In at least part of the groove, the minimum width L1 is within 0.2 mm. The sealant includes a polyamide resin formed such that when two test-plate materials are bonded together at bonding faces facing each other via a bonding portion of the sealant, and moved in parallel with the bonding faces and in opposite directions to have a relative displacement within 0.5 to 5 mm, a stress at least 0.02 N/mm2 is applied to the bonding portion.

Abstract: Provided is an alloy powder for an electrode which enables an alkaline storage battery to have both excellent discharge characteristics and excellent life characteristics. The alloy powder includes a hydrogen storage alloy including an element L, Mg, Ni, Al, and an element Ma. The element L is at least one selected from the group consisting of group 3 elements and group 4 elements of the periodic table (excluding Y). The element Ma is at least two selected from the group consisting of Ge, Y, and Sn. A molar proportion x of Mg in a total of the element L and Mg is 0.008?x?0.54. A molar proportion y of Ni, a molar proportion ? of Al, and a molar proportion ? of the element Ma, per the foregoing total is 1.6?y?4, 0.008???0.32, and 0.01???0.12, respectively.

Abstract: Disclosed is an optical device which includes: an optical component configured to be electrically actuated such that a light transmission state is variable; a driver circuit for the optical component; a power source unit for driving the optical component; a rim for supporting the optical component; a temple having front and rear ends and connected at the front end to the rim; and an earpiece formed at the rear end of the temple. The power source unit includes a secondary battery, a power switch, a power switch control portion, and a use-status sensing portion for sensing the status of use by a user of the optical device. The power switch control portion performs control to turn off the power switch when the use-status sensing portion does not sense any use by the user of the optical device.

Abstract: In an alkaline battery in which a positive electrode 2 containing manganese dioxide, a negative electrode 3, and a separator 4 interposed therebetween are housed in a closed-end cylindrical battery case 1 whose opening is sealed with a gasket 5, a half-width of a 110 plane peak of the manganese dioxide measured by a powder X-ray diffraction analysis is in the range of 1.80-2.40 degrees, and anatase titanium dioxide is contained in the positive electrode such that a ratio of anatase titanium dioxide to the positive electrode is in the range of 0.10-1.50 mass %.

Abstract: An agitator 1 has a vessel 4 provided between an upper powder/particulate material supplier 2 and a lower powder/particulate material discharger 3 to hold therein powder/particulate material to be stirred. The agitator 1 also has a stirrer 7 provided in the vessel 4 to have a stirrer rotating shaft 5 arranged in a horizontal direction and main paddles 6 fastened to the rotating shaft 5, and a multi-feeder 8 provided in the powder/particulate material discharger 3 to have both forward rotation and reverse rotation. The multi-feeder 8 has a discharger rotating shaft 81 and small-size auxiliary paddles 9 integrally rotated with the rotating shaft 81 and designed to be smaller in size than the main paddles 6.

Abstract: In an alkaline battery in which an opening of a battery case 1 containing a power-generating element is sealed via a sealing plate 7 with a gasket 5 interposed between the battery case 1 and the sealing plate 7, the sealing plate 7 has a vent 7a, the gasket 5 has an explosion-proof valve 5a, an electrolyte filter 9 made of a porous membrane is disposed in a space defined by the sealing plate 7 and the gasket 5, a volume of a space defined by the sealing plate 7 and the electrolyte filter 9 is greater than or equal to 0.25 cm3, and a tensile stress of the electrolyte filter 9 at 100% tensile elongation in at least one direction is in a range of 60-4000 N/m.

Abstract: In an alkaline secondary battery including a gelled negative electrode containing zinc alloy powder, an aspect ratio of a particle of the zinc alloy powder is within a range of 2.0-2.4, and the zinc alloy contains 150-350 ppm of bismuth, and 600-1500 ppm of indium.

Abstract: In an alkaline battery in which a positive electrode 2 made of manganese dioxide and a negative electrode 3 are contained in a cylindrical battery case 1 having a closed bottom with a separator 4 interposed between the positive and negative electrodes 2 and 3, and an opening 1b of the battery case 1 is sealed via a sealing plate with a gasket 5 interposed between the battery case 1 and the sealing plate, a thickness of a body 1a of the battery case 1 is in a range of 0.10-0.17 mm, and a half-width of a 110 plane of the manganese dioxide measured by powder X-ray diffraction is in a range of 2.30-2.70 degrees.

Abstract: In an alkaline battery, a positive electrode 2 containing manganese dioxide, a negative electrode 3, and a separator 4 interposed therebetween are housed in a closed-end cylindrical battery case 1 whose opening 1b is sealed with a gasket. The positive electrode contains graphite in such a manner that a ratio of graphite to the positive electrode is in the range of 2.5-4.3 mass %. A half-width of a 110 plane of the manganese dioxide measured by a powder X-ray diffraction analysis is in the range of 2.00-2.40 degrees.

Abstract: A lithium primary battery 10 includes an electrode group in which a positive electrode 1 having iron disulfide as a positive electrode active material and a negative electrode 2 having lithium as a negative electrode active material are wound, with a separator 3 interposed between the positive electrode 1 and the negative electrode, wherein a density of the iron disulfide in a positive electrode mixture containing the positive electrode active material is in a range of 2.2-2.9 g/cm3, and the separator 3 is made of a non-woven fabric whose tensile strength is in a range of 6-30 N/mm2.

Abstract: Reducing an initial voltage degrades intermediate-load discharge performance. In a lithium primary battery containing iron disulfide as a positive electrode active material, a solvent of a nonaqueous electrolyte contains DIOX and DME as main components, and further contains THF. Moreover, the content of THF is 20 vol. % or lower.

Abstract: In an alkaline battery in which a positive electrode 2 made of manganese dioxide and a negative electrode 3 are contained in a cylindrical battery case 1 having a closed bottom with a separator 4 interposed between the positive and negative electrodes 2 and 3, and an opening 1b of the battery case 1 is sealed via a sealing plate with a gasket 5 interposed between the battery case 1 and the sealing plate, a thickness of a body 1a of the battery case 1 is in a range of 0.10-0.17 mm, and a half-width of a 110 plane of the manganese dioxide measured by powder X-ray diffraction is in a range of 2.30-2.70 degrees.

Abstract: In an alkaline battery in which an opening of a battery case 1 containing a power-generating element is sealed via a sealing plate 7 with a gasket 5 interposed between the battery case 1 and the sealing plate 7, the sealing plate 7 has a vent 7a, the gasket 5 has an explosion-proof valve 5a, an electrolyte filter 9 made of a porous membrane is disposed in a space defined by the sealing plate 7 and the gasket 5, a volume of a space defined by the sealing plate 7 and the electrolyte filter 9 is greater than or equal to 0.25 cm3, and a tensile stress of the electrolyte filter 9 at 100% tensile elongation in at least one direction is in a range of 60-4000 N/m.

Abstract: A lithium primary battery includes a positive electrode 1 using iron sulfide as a positive electrode active material, a negative electrode 2 using a lithium alloy as a negative electrode active material, an electrode group 4 formed by winding the positive and negative electrodes 1, 2 with a separator 3 being interposed therebetween, and a non-aqueous electrolytic solution. The lithium alloy contains at least one of magnesium or tin in a range of 0.02-0.2 mol %.

Abstract: An optical device including: one or more optical components configured to be electrically actuated such that light transmission states are variable, a driver circuit for the optical components, a power source unit for driving the optical components, a pair of rims for supporting the optical components, a pair of temples having front and rear ends and being connected at the front ends to the pair of rims, and a pair of earpieces formed at the rear ends of the pair of temples. The power source unit includes a secondary battery, and a power receiver coil for charging the secondary battery. The secondary battery includes a case made of a non-magnetic material.