JPH0685752B2 - Power brush for vacuum cleaner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power brush attached to a suction port of a wide nozzle connected to a tip of a cleaner hose.

[0002]

2. Description of the Related Art Recently, a power nozzle in which a so-called power brush is attached to a nozzle opening of a wide nozzle at the end of a hose of a vacuum cleaner tends to be used as a power nozzle which is particularly effective for cleaning carpets.

In this power brush, a rubber blade is attached by fitting to a plurality of spiral-shaped fitting portions for attaching a plate which are integrally formed on the outer peripheral portion of a shaft made of a hard resin, and both end surface axes of the shaft are attached. A steel rotation bearing pin is integrally attached to the pin hole formed in the core by press fitting.

In this power brush, its pins are attached to both ends of the nozzle opening of the wide nozzle via bearings, and are driven to rotate by a motor. By rotating the power brush while cleaning the carpet, dust inside the carpet,
The dust is strongly drawn to the surface and can be cleaned cleanly.

[0005]

However, since the shaft of the conventional power brush is made of resin material, the rotary bearing pin press-fitted into the pin hole at the end of the power brush often comes off. There was a problem that occurred.

Moreover, since the resin material generates static electricity, there is a disadvantage that dust is likely to adhere to the resin material.

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

[0008]

To achieve the above object, the present invention provides a shaft integrally provided with a single or a plurality of spiral fitting portions for attaching a plate in the outer peripheral portion, and a fitting state in the fitting portion. A power brush for a vacuum cleaner having a blade attached and a steel rotary support pin integrally press-fitted into a pin hole formed in a shaft end portion of the shaft, wherein the shaft is made of aluminum A power brush for a vacuum cleaner characterized by being formed of an extruded material.

The term "blade" is used as a concept including a brush type in which bristles are planted on a rubber base.

[0010]

In the above structure, since the shaft is made of an aluminum material, the rotary bearing pin press-fitted into the pin hole at the end of the shaft is firmly coupled to the shaft and is hard to come off. Also, no static electricity is generated and no dust is attached. Moreover, the shaft is manufactured with high productivity by using the twisted extruded material made of aluminum.

[0011]

Embodiments of the present invention will now be described with reference to 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 rotation bearing pin.

The shaft (2) has two spiral plate-shaped fitting recesses (2a) for attaching the plate on the outer periphery thereof, and is made of a torsion extruded material made of aluminum. As the aluminum, from the viewpoint of extrudability and the like, for example, an A6063 alloy tempered to T5, A6N0 tempered to T5 is used.
1 alloy or the like is preferably used. The shaft (2) is manufactured, for example, by extruding the bearing of the extrusion hole in a twisted state from the inlet side of the extruded metal toward the outlet side at an angle corresponding to the lead angle of the fitting recess (2a). This can be done by using a die for use.

Further, as shown in FIG. 3, pin holes (2) having a predetermined depth are formed in the shaft core portions of both end surfaces of the shaft (2).
b) has been drilled.

The blade (3) is made of an elastic material such as rubber and, as shown in FIG. 2, has a base adapted to the shape of the fitting recess (2a) of the shaft (2). The fitting protrusion (3a) and the blade body (3b) protruding outward from the fitting recess (2a) are integrally formed.

The rotary bearing pin (4) is made of steel and, as shown in FIG. 3, a pin hole (2b) on the end face of the shaft (2).
It is attached to the shaft (2) by being press-fitted into the shaft (2).

As shown in FIG. 4, the power brush (1) having the above structure is arranged at the nozzle opening (7) of the wide nozzle body (6) connected to the tip of the hose of the cleaner.
Both rotation bearing pins (4) are attached to the nozzle body (6) through the bearing (8) so that they can rotate freely. And one pin (4)
A motor (10) is connected to the power brush (1) via a power transmission mechanism (9), and the power brush (1) is rotated by driving the motor (10).

As described above, since the shaft (2) of the power brush (1) is made of an aluminum material, the pin (4) is firmly attached by press fitting and the pin is effectively prevented from coming off. Not only that, the coupling force of the pin (4) and the shaft (2) by press fitting is strong against the torque, and the pin (4) and the shaft (2) can be used without any special means for the vacuum cleaner. It is possible to effectively prevent the occurrence of relative rotation with.

[0019]

As described above, according to the present invention, since the shaft is made of the aluminum material, the rotary bearing pin press-fitted into the pin hole at the end of the shaft is firmly connected to the shaft, and the conventional shaft bearing is firmly connected to the shaft. It is possible to prevent the occurrence of such pin pull-out, and at the same time, it is possible to eliminate the inconvenience that static electricity does not occur and dust adheres. Moreover, since it is made of aluminum, it is lightweight, and therefore the inertial force does not become excessive and the rotation can be favorably performed.
In addition, since the shaft is made of a twisted extruded material made of aluminum, it has excellent productivity and is advantageous in terms of cost.

[Brief description of drawings]

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

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

FIG. 3 is a perspective view of the power brush with the shaft and the pin separated.

FIG. 4 is a front view of a nozzle port of a power nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Power brush 2 ... Shaft 2a ... Fitting concave part (fitting part for plate attachment) 2b ... Pin hole 3 ... Blade 4 ... Rotation bearing pin.

Claims (1)

[Claims] 1. A shaft integrally having a single or a plurality of spiral fitting portions for attaching a plate on an outer peripheral portion, a blade fitted in the fitting portion in a fitted state, and an end surface axial core portion of the shaft. In a power brush for a vacuum cleaner having a steel rotary bearing pin integrally press-fitted into a pin hole formed in the shaft, the shaft is formed of a twisted extruded material made of aluminum. Power brush for vacuum cleaner.