Abstract: A light blocking member according to the present disclosure is for a projection video display device provided with an optical system that projects video light and a projection lens on which the video light is incident, the light blocking member being disposed between the optical system and the projection lens, the light blocking member including: a first light blocking portion that absorbs and converts into heat a part of unnecessary light unnecessary for the projection lens in the video light; and a reflector that reflects, as reflected light, light that is a part of the unnecessary light and that is not absorbed by the first light blocking portion.

Abstract: A battery mounting mechanism includes a terminal connector, a first stopper, a second stopper, and a release button. The first stopper is disposed movably in the Z axis direction with respect to the terminal connector. The second stopper is disposed on the opposite side of the terminal connector with respect to the first stopper, and is disposed movably in the Z axis direction with respect to the terminal connector. The release button is arranged to release the restriction of the first battery or the restriction of the second battery by the first stopper, and arranged to drive the first stopper and the second stopper in the Z axis direction with respect to the terminal connector.

Abstract: A cap 1 attached to housings 2 and 3 can be opened and closed. The cap 1 includes a tongue portion 1a protruding from a cap body 1d; and claw portions engaging with the housing (second outer housing) 3. An elongated hole 1b is formed on the tongue portion 1a. The housing 3 includes: a notched hole 3b for accepting the tongue portion 1a; a stopper 3c that is unremovably inserted into the elongated hole 1b so as to permit relative movement; and engaged portions engaged with the claw portions of the cap 1 to fix the cap 1. When the cap 1 is closed, the stopper 3c is fixed on the elongated hole 1b on the side of the cap body 1d by protrusions 1c provided in the elongated hole 1b.

Abstract: A cap 1 attached to housings 2 and 3 can be opened and closed. The cap 1 includes a tongue portion 1a protruding from a cap body 1d; and claw portions engaging with the housing (second outer housing) 3. An elongated hole 1b is formed on the tongue portion 1a. The housing 3 includes: a notched hole 3b for accepting the tongue portion 1a; a stopper 3c that is unremovably inserted into the elongated hole 1b so as to permit relative movement; and engaged portions engaged with the claw portions of the cap 1 to fix the cap 1. When the cap 1 is closed, the stopper 3c is fixed on the elongated hole 1b on the side of the cap body 1d by protrusions 1c provided in the elongated hole 1b.

Abstract: A battery mounting mechanism includes a terminal connector, a first stopper, a second stopper, and a release button. The first stopper is disposed movably in the Z axis direction with respect to the terminal connector. The second stopper is disposed on the opposite side of the terminal connector with respect to the first stopper, and is disposed movably in the Z axis direction with respect to the terminal connector. The release button is arranged to release the restriction of the first battery or the restriction of the second battery by the first stopper, and arranged to drive the first stopper and the second stopper in the Z axis direction with respect to the terminal connector.