Electric cleaner and suction mouth body

Abstract

A floor brush for an electric cleaner, in which cleaning performance by a rotating cleaning body is improved while costs of the floor brush is suppressed. When a lower end section of a front cover (18) comes in contact with an obstruction and is rotated backward, a rear face of the front cover (18) comes into contact with a rotating brush (21) and simultaneously the lower end section approaches a floor surface (F). This causes an opening (38) to be narrower, increasing a load in a rotating cleaning body chamber (22) to reduce suction from the rotating cleaning body chamber (22) side. As a result, the volume of suction air from a suction mouth is relatively increased to increase rotational force of an air turbine (27a). As a consequence, in correspondence with an increase in a load applied to the rotating brush (21), rotational force of the rotating brush (21) can be increased without using, for example, a motor, so that sufficient cleaning performance by the rotating brush (21) can be obtained while costs of the brush are suppressed.

Description

technical field [0001] The present invention relates to an electric vacuum cleaner provided with a drive unit having a fan rotatable by suction air from the suction port, and a suction port body thereof. Background technique [0002] Conventionally, as floor brushes used in electric vacuum cleaners, there has been known a structure in which a flat air turbine is rotated by suction air sucked in from an suction port, and the rotary brush is rotated by the rotation. Such a floor brush includes a horizontally long housing having an air inlet on the upper side. On this housing, the rotating cleaning body chamber that accommodates the rotating brush is divided and formed on the front side, and the suction chamber provided with the suction port in the lower part communicates with the rear of the rotating cleaning body chamber, and on the rear of the rotating cleaning body chamber The drive chamber that accommodates the air turbine and communicates with the suction port is defined...

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned floor brush, for example, when cleaning the floor surface at places such as obstacles, if the front side of the floor brush is made to abut against the obstacle, the brush portion of the rotating brush cannot approach the floor surface at the above-mentioned obstacle place, In addition, since the suction from the front side of the casing to the suction port does not change, the rotational force of the rotating brush does not increase, and there is a problem that it is not easy to sufficiently clean up obstacles.

[0006] In addition, it is also conceivable to ensure the rotational force of the rotary brush by rotating the rotary brush with a motor, but in this case, the cost of the floor brush is correspondingly increased due to the installation of the motor.

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