Abstract: A light shielding member formed of an annular metal base material includes a front surface, a rear surface facing away from the front surface, and an outer peripheral surface connecting the front and rear surfaces in an outer periphery of the light shielding member. The outer peripheral surface includes a ridge that is protruded outward furthest therein in a radial direction of the light shielding member, in a cross section that is parallel to a plane perpendicular to the front surface.

Abstract: A power storage apparatus including a battery and a control circuit that controls the charging or discharging of the battery, wherein during a polarization elimination time period extending from the charging/discharging end time of the battery to a polarization-eliminated time at which polarization of the battery can be judged to have been eliminated, the control circuit obtains, as an amount of change, the difference between a voltage measured at a first time set according to the temperature of the battery and a voltage measured at a second time following the first time and set according to the temperature of the battery, and sums the product of the amount of change and an estimation coefficient and the voltage measured at the first or second time so as to estimate an open-circuit voltage of the battery to be provided after elimination of the polarization of the battery.

Abstract: Provided is a power storage apparatus including a battery and a control circuit that controls charging and discharging of the battery, wherein during a polarization elimination time period, the control circuit obtains, as an amount of change, a difference between a first voltage of the battery measured at a first time and a second voltage of the battery measured at a second time following the first time, multiplies the amount of change by an estimation coefficient that depends on the first voltage, the second voltage, a temperature of the battery, a temperature of a space around the battery, or a degree of deterioration of the battery, and sums the value obtained so as to estimate an open-circuit voltage to be provided after elimination of the polarization of the battery.

Abstract: Provided is a power storage apparatus including a battery and a control circuit that controls charging and discharging of the battery, wherein during a polarization elimination time period, the control circuit obtains, as an amount of change, a difference between a first voltage of the battery measured at a first time and a second voltage of the battery measured at a second time following the first time, multiplies the amount of change by an estimation coefficient that depends on the first voltage, the second voltage, a temperature of the battery, a temperature of a space around the battery, or a degree of deterioration of the battery, and sums the value obtained so as to estimate an open-circuit voltage to be provided after elimination of the polarization of the battery.

Abstract: A power storage apparatus including a battery and a control circuit that controls the charging or discharging of the battery, wherein during a polarization elimination time period extending from the charging/discharging end time of the battery to a polarization-eliminated time at which polarization of the battery can be judged to have been eliminated, the control circuit obtains, as an amount of change, the difference between a voltage measured at a first time set according to the temperature of the battery and a voltage measured at a second time following the first time and set according to the temperature of the battery, and sums the product of the amount of change and an estimation coefficient and the voltage measured at the first or second time so as to estimate an open-circuit voltage of the battery to be provided after elimination of the polarization of the battery.

Abstract: A detachable device includes: a detachable member that is provided to be attachable to and detachable from an apparatus main body in which a first rotating member is provided and that includes a second rotating member which is brought into press-contact with the first rotating member; a moving member that is provided in the apparatus main body, that holds the detachable member at an attachment position to the apparatus main body so as to maintain a press-contact load between the first rotating member and the second rotating member, and that is movable to a position at which the detachable member is not held by the moving member; and a release member as defined herein.

Abstract: A detachable device includes: a detachable member that is provided to be attachable to and detachable from an apparatus main body in which a first rotating member is provided and that comprises a second rotating member which is brought into press-contact with the first rotating member; a moving member that is provided in the apparatus main body, that holds the detachable member at an attachment position to the apparatus main body so as to maintain a press-contact load between the first rotating member and the second rotating member, and that is movable to a position at which the detachable member is not held by the moving member; and a release member as defined herein.

Abstract: A decurler includes an endless decurling belt that is disposed so as to face an image surface of a recording medium to which an image has been thermally fixed, a decurling roller that contacts the decurling belt so as to form a decurling region between the decurling roller and the decurling belt, and a support member that is made of a thermally conductive synthetic resin having a thermal conductivity of 1 (W/mK) or higher and that directly or indirectly contacts the decurling belt.

Abstract: A decurler includes an endless decurling belt that is disposed so as to face an image surface of a recording medium to which an image has been thermally fixed, a decurling roller that contacts the decurling belt so as to form a decurling region between the decurling roller and the decurling belt, and a support member that is made of a thermally conductive synthetic resin having a thermal conductivity of 1(W/mK) or higher and that directly or indirectly contacts the decurling belt.

Abstract: A fire detector comprising a socket and a detector head with an electric circuit therein. The socket is provided with couplings for voluntarily defining the structure of an engaging portion thereof to designate a detector head to be coupled and each engaging portion of the detector heads have a specific structure to engage with the engaging portion defined by the couplings. Hence, no detector head other than the designated detector head can be coupled to the socket plate.