JPH08112225A - Filter for electric cleaner - Google Patents

Abstract

PURPOSE: To eliminate perforations which are made by a needle in machine- stitching and to prevent fine dust from passing through perforations in a filter by using a synthetic resin nonwoven fabric and forming it into a cup shape by thermally fusing seams together. CONSTITUTION: A cleaner body 1 has a power source battery 2, a motor 3 which is driven by the power battery and a fan 4 which is directly connected to the motor 3, and an electric circuit is opened and closed by a switch 5. A dust case 6 is attached to the head of the cleaner body 1 in a detachable manner, and a suction opening 10 which sucks dust by the rotation of the fan 4 and a check valve 11 which prevents sucked dust from flowing backwards are provided. The dust case 6 contains a soft polyvinyl chloride resin sealing packing 8 which is formed in a filter frame 7 as an integral part thereof and a filter 9 which is formed in a cup shape by induction-welding polyester nonwoven fabric seams with a pore diameter of about 10 to 20μm. Thus it does not happen that fine dust may pass through perforations of the filter and sticking to the motor and the switch, thereby malfunction can be prevented from causing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for an electric vacuum cleaner which is mainly used for cleaning the interior of a household or cleaning an automobile.

[0002]

2. Description of the Related Art Conventionally, in a filter of this type of electric vacuum cleaner, a seam is sewn to form a non-woven fabric into a cup shape. Even if it was selected to be about 20 μm, dust with a diameter larger than this was passing through the needle hole of the sewing machine.

[0003]

SUMMARY OF THE INVENTION Therefore, according to the present invention, when dust that has been sucked in by an electric vacuum cleaner is stored in a dust case, fine dust passes through the needle holes of the sewing machine of the filter, and the motor and switch inside the filter and The purpose is to prevent fine dust from adhering to the battery and causing a malfunction.

[0004]

[Means for Solving the Problems] To achieve this purpose,
The filter for the electric vacuum cleaner of the present invention uses a synthetic resin non-woven fabric, and the seam is welded to form a cup shape.

[0005]

[Function] Since the seam of the synthetic resin non-woven fabric forming the filter is heat-welded, the sewing machine needle hole that occurs during sewing is eliminated, and therefore fine dust does not pass through the sewing machine needle hole of the filter. Motors, switches, batteries, etc. will not be damaged by minute dust.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an electric vacuum cleaner using the filter of the present invention. In the figure, reference numeral 1 is a cleaner body, and inside the cleaner body 1 is a power supply battery 2 and is driven by the power supply battery 2. Motor 3 and fan 4 directly connected to motor 3
And a switch 5 for opening and closing the electric circuit, and a dust case 6 is detachably attached to the tip of the cleaner body 1. This dust case 6 is a filter formed by forming a soft polyvinyl chloride resin seal packing 8 integrally formed with a filter frame 7 inside and a seam of a polyester non-woven fabric having a hole diameter of about 10 to 20 μm by high frequency fusion a to form a cup shape. 9, a suction port 10 for sucking dust by the rotation of the fan 4 and a check valve 11 for preventing backflow of the sucked dust.

Next, the operation will be described. When the switch 5 is turned on, the motor 3 is rotated by using the battery 2 as a power source, the fan 4 directly connected to the motor 3 is rotated to suck external dust from the suction port 10, and the check valve 11 is opened to open the cylindrical dust case 6 Dust is stored between the filter and the cup-shaped filter 9. When discarding the stored dust in a dustbin or the like, remove the dust case 6 from the cleaner body 1 and further remove the filter 9 to discard the dust in the dust case 6.

[0009]

As described above, according to the present invention, since a synthetic resin non-woven fabric is used for the filter and the seams are heat-welded, the sewing machine needle hole that is produced during sewing is not left, and therefore fine dust is filtered. It has the effect of preventing it from passing through the sewing machine needle and entering the inside of the filter.

[Brief description of drawings]

FIG. 1 is a front vertical sectional view of an electric vacuum cleaner using a filter of the present invention.

FIG. 2 is a half cutaway view of the filter.

FIG. 3 is a top view of the filter.

[Explanation of symbols]

 1 Vacuum cleaner body 2 Power battery 3 Motor 4 Fan 5 Switch 6 Dust case 7 Filter frame 8 Seal packing 9 Filter 10 Suction port 11 Backflow prevention valve a High frequency fusion

Claims (1)

[Claims] 1. A filter for an electric vacuum cleaner, wherein a synthetic resin nonwoven fabric is used, and a seam is heat-welded to form a cup shape.