JPH04259429A - Power blush for cleaner - Google Patents

Abstract

PURPOSE:To prevent a rotation support pin from coming off and prevent generation of static electricity so as to prevent dust from attaching to a vacuum cleaner power blush having a shaft, a blade and the rotation support pin by forming the shaft from a twisted extruded material made of aluminium. CONSTITUTION:A shaft 2 has on its outer peripheral portion a spiral fitting recessed portion 2a for attaching a plate thereto and is formed by a twisted extruded material made of aluminium. Pin holes 2b of predetermined depth are bored through the shaft core portions of both end faces of the shaft 2. A blade 3 is fabricated into an integral molding comprising a fitting projecting portion 3a which fits with the inner configuration of the fitting recessed portion 2a and a blade main body portion 3b projecting outward from the fitting recessed portion 2a. A rotation support pin 4 is made of copper and attached to the shaft 2 while being pressed into the pin hole 2b of each of the end faces of the shaft 2 and integrated with the shaft 2. The pin 4 is thereby firmly attached to the shaft 2 and so prevented from coming off and also rotations of the pin 4 and the shaft 2 relative to each other can be prevented.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a power brush that is attached to the suction port of a wide nozzle connected to the end of a vacuum cleaner hose.

0002

2. Description of the Related Art Recently, power nozzles, in which a so-called power brush is attached to the nozzle opening of a wide nozzle at the end of a vacuum cleaner hose, have become popular as they are especially effective for cleaning carpets.

[0003] In this power brush, a rubber blade is attached by fitting to a plurality of spiral blade attachment fittings that are integrally molded on the outer circumference of a shaft made of hard resin, and the shaft is attached to both end surfaces of the shaft. A steel rotary support pin is integrally attached by press-fitting into a pin hole formed in the core.

[0004]The power brush has its pins attached to both ends of the nozzle opening of the wide nozzle via bearings, and is rotated by a motor. By cleaning the carpet while rotating this power brush, you can remove dust inside the carpet.
Debris is strongly drawn to the surface and can be cleaned thoroughly.

[0005]

[Problems to be Solved by the Invention] However, because the shaft of conventional power brushes is made of resin material, the rotary support pin press-fitted into the pin hole at the end of the shaft often comes off. There was a problem that occurred.

Moreover, since resin materials generate static electricity, there is also the disadvantage that dust tends to adhere to them.

[0007] An object of the present invention is to provide a power brush for a vacuum cleaner that can eliminate such drawbacks.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a shaft that integrally has one or more spiral fitting portions for attaching a plate on its outer periphery, and a shaft that is fitted into the fitting portions. A vacuum cleaner power brush having an attached blade and a steel rotary bearing pin integrally attached by press fitting into a pin hole formed in an end face axis of the shaft, wherein the shaft is made of aluminum and has a torsion shape. The gist of the present invention is a power brush for a vacuum cleaner characterized by being formed from an extruded material.

[0009] The term "blade" is used to include brush-type blades in which bristles are embedded in a rubber base.

0010

[Operation] In the above structure, since the shaft is made of aluminum material, the rotary support pin press-fitted into the pin hole at the end of the shaft is firmly connected to the shaft and difficult to come off. Furthermore, there is no generation of static electricity and no accumulation of dust. Further, by making the shaft a torsionally extruded material of aluminum, the shaft can be manufactured with high productivity.

[0011]

Embodiments Next, embodiments of the present invention will be explained based on the drawings.

In the power brush (1) shown in FIGS. 1 and 2, (2) is a shaft, (3) is a blade, and (4) is a rotary support pin.

The shaft (2) has two spiral fitting recesses (2a) for attaching the plate on its outer periphery.
It is made of twisted aluminum extrusion. As aluminum, from the viewpoint of extrudability etc., for example, T5
A6063 alloy tempered to T5, A6N tempered to T5
01 alloy etc. are preferably used. The shaft (2) is manufactured by, for example, extrusion in which the bearing of the extruded hole is twisted at an angle corresponding to the lead angle of the fitting recess (2a) from the inlet side to the outlet side of the extruded metal. This can be done by, for example, using a die.

Further, as shown in FIG. 3, pin holes (2
b) is perforated.

The blade (3) is made of an elastic material such as rubber, and as shown in FIG. The fitting convex portion (3a) and the blade body portion (3b) projecting outward from the fitting recess (2a) are manufactured as an integrally molded product.

The rotation support pin (4) is made of steel, and as shown in FIG.
) and is attached to the shaft (2) in an integrated state.

As shown in FIG. 4, the power brush (1) configured as described above is placed in the nozzle opening (7) of a wide nozzle body (6) connected to the end of the hose of a vacuum cleaner.
Both rotary support pins (4) are attached to the nozzle body (6) via bearings (8) so that they can freely rotate. And one pin (4)
A motor (10) is connected to the motor (10) via a power transmission mechanism (9), and the power brush (1) is rotated by the drive of the motor (10).

As mentioned above, since the shaft (2) of the power brush (1) is made of aluminum material, the pin (4) is firmly attached by press-fitting, and the pin falling out is effectively prevented. Not only pins (4)
The bonding force created by press-fitting the pin (4) and the shaft (2) is strong even against torque, and it is effective for generating relative rotation between the pin (4) and the shaft (2) without any special measures for vacuum cleaners. can be prevented.

[0019]

Effects of the Invention As described above, since the shaft is made of aluminum material, the rotary support pin press-fitted into the pin hole at the end of the shaft is firmly connected to the shaft, which is different from the conventional method. It is possible to prevent pins from falling out, and at the same time, there is no generation of static electricity, and the inconvenience of dust adhesion can be eliminated. In addition, since it is made of aluminum, it is lightweight, so that the inertial force does not become excessive and rotation can be performed satisfactorily. In addition, since the shaft is made of torsionally extruded aluminum, it has excellent productivity and is advantageous in terms of cost.

[Brief explanation of the drawing]

FIG. 1 is a side view of a power brush.

FIG. 2 is a cross-sectional view of the power brush.

FIG. 3 is a perspective view of the power brush showing the shaft and pin in a separated state.

FIG. 4 is a front view of the nozzle opening of the power nozzle.

[Explanation of symbols]

1...Power brush 2...Shaft 2a...Fitting recess (fitting part for attaching the plate) 2b...Pin hole 3...Blade 4...Rotation support pin.

Claims (1)

[Claims] Claim 1: A shaft integrally having one or more spiral fitting portions for attaching a plate on its outer periphery, a blade attached to the fitting portion in a fitted state, and an end face shaft core portion of the shaft. A power brush for a vacuum cleaner having a rotary bearing pin made of steel integrally attached by press-fitting into a pin hole formed in the brush, characterized in that the shaft is formed of a torsionally extruded material made of aluminum. Power brush for vacuum cleaner.