A hand vacuum cleaner with a finger grip area that is provided between a forward side of the handle and a rear side of the main body, and wherein the suction motor is positioned between the cyclone and the finger grip area and an axis that extends between the front of the cyclone and the handle extends through the suction motor.

A hand vacuum cleaner with a finger grip area that is provided between a forward side of the handle and a rear side of the main body, and wherein the suction motor is positioned between the cyclone and the finger grip area and an axis that extends between the front of the cyclone and the handle extends through the suction motor.

A robot cleaner includes a main body having a suction motor; a moving unit to automatically move the main body; and a suction module to be in communication with the suction motor and to clean a floor, wherein an accommodating portion in which a part of the suction module is accommodated is provided at a lower portion of a front side of the main body, and while the suction module is located in the accommodating portion, a part of the suction module is disposed to be vertically overlapped with the main body, and another part of the suction module protrudes toward both sides from a front portion of the main body, and still another part of the suction module protrudes to a front of the main body.

A robot cleaner includes a main body having a suction motor; a moving unit to automatically move the main body; and a suction module to be in communication with the suction motor and to clean a floor, wherein an accommodating portion in which a part of the suction module is accommodated is provided at a lower portion of a front side of the main body, and while the suction module is located in the accommodating portion, a part of the suction module is disposed to be vertically overlapped with the main body, and another part of the suction module protrudes toward both sides from a front portion of the main body, and still another part of the suction module protrudes to a front of the main body.

A locking sleeve for connection with a valve box assembly of a central vacuum system includes, a first end adapted to couple to a wall of a valve box assembly, a second end opposite the first end, a central vertical axis between the first end and the second end, a first side adapted to be adjacent to a rear wall of a valve box assembly, a second side opposite the first side, a central horizontal axis between the first side and the second side, a slidable locking mechanism moveable in a sliding manner. The slidable locking mechanism is adapted to secure a vacuum hose assembly to the valve box assembly of the central vacuum system.

An extension pipe (30) is configured to allow a suction tool (70) to be connected to one end side in a pipe axis direction and a vacuum cleaner main body (10) to be connected to another end. The extension pipe (30) includes a power-receiving portion (36) configured to receive and supply electric power to be fed to a battery (17a) provided to the vacuum cleaner main body (10).

An extension pipe (30) is configured to allow a suction tool (70) to be connected to one end side in a pipe axis direction and a vacuum cleaner main body (10) to be connected to another end. The extension pipe (30) includes a power-receiving portion (36) configured to receive and supply electric power to be fed to a battery (17a) provided to the vacuum cleaner main body (10).

Disclosed is a central vacuum system. The central vacuum system comprises a first vacuum device, a second vacuum device, and a hose connected between the first vacuum device and the second vacuum device; the first vacuum device and the second vacuum are controlled by a linked switch, interior of the hose remains positive or slightly negative pressure. A self-operated differential pressure regulating valve arranged at the end of the hose is capable of generating corresponding air resistance under different airflow rate so as to maintain the interior pressure of the hose at a stable slightly positive or negative pressure.

It is disclosed an adapter device for a vacuum cleaner comprising a hollow tubular body comprising a first end configured to engage a part of the vacuum cleaner and a second end configured to engage an accessory or a flexible tube, wherein the hollow tubular body is at least partially of a deformable material with elastic return and comprises a ring protruding radially outwards from the external surface of the tubular body. The adapter device could comprise a plurality of rings protruding radially outwards from the external surface of the tubular body. The rings of the plurality of rings could have an increasing diameter.

It is disclosed an adapter device for a vacuum cleaner comprising a hollow tubular body comprising a first end configured to engage a part of the vacuum cleaner and a second end configured to engage an accessory or a flexible tube, wherein the hollow tubular body is at least partially of a deformable material with elastic return and comprises a ring protruding radially outwards from the external surface of the tubular body. The adapter device could comprise a plurality of rings protruding radially outwards from the external surface of the tubular body. The rings of the plurality of rings could have an increasing diameter.