Abstract: A smoke detector includes: a casing; a first light emitting unit; a second light emitting unit; and a light receiving unit. A second scattering angle that is an angle between the reception axis of the light receiving unit and a second extension extending from an intersection of the second emission axis and the reception axis in a direction away from the second light emitting unit is larger than a first scattering angle that is an angle between the reception axis of the light receiving unit and a first extension extending from an intersection of the first emission axis and the reception axis in a direction away from the first light emitting unit.

Abstract: Realization of a sensing device that does not suspend the sensing function. A sensing device having a sensor for sensing the external environment through a window frame portion provided at a predetermined position of a main body of a vehicle or the like, and a plurality of protective members for protecting the sensor are provided. At least one of the protective members is arranged at the window frame portion, and the sensor is arranged inside the protective member at the window frame portion to be protected, and the protective member at the window frame portion, is evacuated from the window frame portion when it becomes dirty or periodically, and instead, another protective member is moved to be arranged at the window frame portion and the evacuated protective member is washed by the washing device so that it can be used again.

Abstract: The object is in the event of a fire, you can use something close to you to prevent poisonous gas. A wallet-type smartphone case has face-apply part which can cover at least nose and mouth of a face, thereby to have such function of a smoke proof mask or gas mask and the face-apply part has a surrounding member, at least a part of the surrounding member is attached to the periphery of the body, the surrounding member can select a standing state and a lying down state, and the surrounding member takes the lying down state when used as a smartphone case, and takes the standing state when used as the smoke proof mask or gas mask.

Abstract: A runner extending from a blast furnace to a slag pit, water spray unit for manufacturing granulated slag or slag ladle is partly or wholly composed of a plurality of trough elements each made from copper or copper alloy. Each trough element comprises a hollow body having an inner space which is divided into sections by a plurality of partitions to define throughout the inner space of the body a series of passages in which a cooling medium is allowed to flow without stagnation. The cooling medium within the hollow body of the trough element is introduced under a predetermined pressure from a pipe line for supplying cooling medium into the body, whereby the cooling medium freely flows at a relatively high velocity in the passages defined by the partitions and molten slag glowing in contact with the surface of the trough element is cooled to a desired temperature which prevents wear and loss of the element and makes it possible to produce hard granulated slag from the molten slag.