Abstract: A dust-collecting device includes a cylindrical casing and an insertion part. The casing includes an introduction port introducing dust-containing air. The insertion part is positioned inside the casing to allow a swirling flow of the dust-containing air to be formed between the insertion part and the casing. The insertion part includes a cylindrical side surface part spaced away from and facing the casing and a projection part. The projection part includes, in a side of the first dust-collecting part, a projection surface projecting outward from the side surface part. The projection surface includes plural straightening parts and a connection part. The straightening parts are formed spirally toward the side of the first dust-collecting part, from upstream to downstream sides of the swirling flow. The connection part connects a downstream end side of one of the straightening parts and an upstream end side of another one of the straightening parts.

Abstract: A vacuum cleaner includes a main body portion, a secondary battery, an electric blower, a handle and a conductive member. The secondary battery is disposed in the main body portion. The electric blower operates by electric power supply from the secondary battery. The handle is one which a user contacts when the vacuum cleaner is used. At least a part of the conductive member is disposed at the handle and conducts static electricity generated due to operation of the electric blower.

Abstract: A vacuum cleaner is provided with a cleaner main body having an electric blower and a handle. The handle is shaped such that a gravity center position of the cleaner main body remains substantially unchanged in a state in which any one region is gripped.

Abstract: A dust collecting device achieving higher efficiency in dust-and-dirt separation while suppressing adhesion of dust and dirt, and a vacuum cleaner equipped therewith. The dust-collecting device includes a cylindrical casing and an insertion part. The casing includes an introduction port allowing dust-containing air to be introduced inside. The insertion part is disposed inside the casing to allow swirling flow of the dust-containing air to be formed between the insertion part and an inner surface of the casing. The insertion part includes a cylindrical enlarged part, an opening part, and a wall part. The opening part is formed on a surface of the enlarged part in a side of a first centrifuge separator. The wall part projects at least at a position corresponding to an outside of the opening part, from the surface of the enlarged part in the side of the first centrifuge separator, toward the first centrifuge separator.

Abstract: A dust-collecting device includes a cylindrical casing and an insertion part. The casing includes an introduction port introducing dust-containing air. The insertion part is positioned inside the casing to allow a swirling flow of the dust-containing air to be formed between the insertion part and the casing. The insertion part includes a cylindrical side surface part spaced away from and facing the casing and a projection part. The projection part includes, in a side of the first dust-collecting part, a projection surface projecting outward from the side surface part. The projection surface includes plural straightening parts and a connection part. The straightening parts are formed spirally toward the side of the first dust-collecting part, from upstream to downstream sides of the swirling flow. The connection part connects a downstream end side of one of the straightening parts and an upstream end side of another one of the straightening parts.

Abstract: Provided is a vacuum cleaner capable of efficiently utilizing exhaust of an electric blower when the vacuum cleaner is used as a blower. An exhaust air path (37) is arranged in a body portion (21) so as to communicate between an exhaust side of the electric blower and an exhaust port. A connecting port (34) is arranged on the body portion (21). A blower air path (38) is arranged in the body portion (21) so as to communicate between the exhaust side of the electric blower and the connecting port (34). A switching valve (39) is arranged capable of opening and closing the connecting port (34), so as to switch between the exhaust air path (37) and the blower air path (38) according to the opening and closing. An attachment (17), when being attached to the connecting port (34), communicates with the blower air path (38) upon switching by the switching valve (39).

Abstract: A vacuum cleaner includes a main body portion, a secondary battery, an electric blower, a handle and a conductive member. The secondary battery is disposed in the main body portion. The electric blower operates by electric power supply from the secondary battery. The handle is one which a user contacts when the vacuum cleaner is used. At least a part of the conductive member is disposed at the handle and conducts static electricity generated due to operation of the electric blower.

Abstract: A vacuum cleaner is provided with a cleaner main body having an electric blower and a handle. The handle is shaped such that a gravity center position of the cleaner main body remains substantially unchanged in a state in which any one region is gripped.

Abstract: A suction nozzle for a vacuum cleaner is designed so that exhaust from a motor blower in the body of the vacuum cleaner is provided into a suction port of the suction nozzle. The exhaust provided into the suction nozzle is prevented from being discharged to the atmosphere at the point where the suction nozzle meets the to-be-cleaned surface.