JPH0549573A - Dust collection meter for electric cleaner - Google Patents

Abstract

PURPOSE:To obtain a dust collection meter which allows no drop in sucking force of a body by a method wherein a retaining section is formed on the inner circumference of a pipe to regulate the movement of an indicating part during the contraction of an elastic body and a packing is arranged between the indicating section and the retaining section. CONSTITUTION:A circular retaining section 15 is inserted into a pipe 6 and fastened in the inner circumference at the center of pipe. A circular packing 16 is arranged on the side of an indicating section 13 of the retaining section 15 and as the packing 16 moves toward a connection part 9 against the resilience of a spring 14 of the indicating section 13, it is interposed between the indicating section 13 and the retaining section 15 so that the indicating section 13 and the retaining section 15 are kept airtight to prevent wetting of air. Thus, when dirts are stored with a dust collection chamber to lower a sucking force of the body of a cleaner, the indicating section moves toward the body of the cleaner against the resilience of the spring and abuts the retaining section while being put closely with the packing thereby preventing of the lowering of a sucking force of the body of the cleaner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collector that indicates the amount of dust collected by an electric vacuum cleaner.

[0002]

2. Description of the Related Art Conventionally, this type of dust collecting meter is disclosed in
As described in Japanese Patent Publication No. 8939 (A47L 9/19), the indicator is biased toward the intake side of the pipe by a spring, and the indicator has a flow path communicating from the outer peripheral surface to the inside. Are known. According to this configuration, when dust accumulates in the dust bag, the amount of air flowing from the suction port of the cleaner body to the electric blower side through the dust bag decreases, and the inside of the cleaner body becomes negative pressure, The indicator that closes the intake port of the pipe by the spring moves to the cleaner body side, and the air outside the cleaner body flows into the intake side of the electric blower through the flow path of the intake port and the indicator unit, causing overheating of the electric blower. It is designed to prevent

However, according to this structure, even when the amount of dust in the dust collecting chamber is small and the amount of air passing through the dust collecting chamber from the suction port is relatively large, the indicator moves slightly to the cleaner body side and the outside air is discharged. There is a problem that the suction force of the main body of the vacuum cleaner decreases because the amount of outside air that flows in is large.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above drawbacks, and an object of the present invention is to provide a dust collecting meter that does not reduce the suction force of the cleaner body.

[0005]

According to the present invention, there is provided a transparent pipe communicating with the outside of a cleaner body through an intake port formed at one end and an inside of the pipe attached to the opening at the other end of the pipe. The pipe is provided with a connecting portion that communicates with an intake side of the electric blower, an instruction portion slidably arranged in the pipe, and an elastic body that urges the instruction portion toward the intake port of the pipe. In the inner periphery of the elastic member, a locking portion that restricts the movement of the indicating portion when the elastic body is contracted is formed, and a packing that holds airtight between the indicating portion and the locking portion is arranged. To do.

[0006]

According to the structure of the present invention, the indicator moves to the cleaner body side according to the amount of dust in the dust collection chamber to notify that the dust has accumulated, and the dust collection chamber has a small amount of dust. When the suction force of the main body is relatively large and the vacuum degree inside the cleaner body is low, the indicator does not move to the cleaner body side much, and the outside air flowing in from the pipe intake port leaves a gap between the indicator and the pipe. To flow into the main body of the vacuum cleaner to prevent overheating of the electric blower.

When the dust collecting chamber is filled with dust and the suction force of the cleaner body is small and the vacuum degree of the cleaner body is high, the indicator moves toward the cleaner body and hits the locking portion. contact,
Since the packing closely adheres, the outside air from the intake port is prevented from flowing into the cleaner body.

[0008]

An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 4, reference numeral 1 denotes a cleaner main body, which is provided with a dust collection chamber in the front inside and an electric blower storage chamber (neither is shown) for storing the electric blower in the rear inside. Reference numeral 2 denotes wheels provided on both sides of a rear portion of the cleaner body 1, and reference numeral 3 denotes casters provided at a bottom portion of the cleaner body 1.

Reference numeral 4 denotes a display portion formed on the upper portion of the cleaner body 1, and reference numeral 5 denotes a dust collecting meter arranged on the display portion 4, which will be described in detail below with reference to FIGS. 1 to 3.

Reference numeral 6 denotes a transparent pipe embedded in the display portion 4 of the cleaner body 1, which communicates with the outside of the cleaner body 1 through an intake port 7 formed at one end and an opening 8 at the other end. have. Reference numeral 9 is a connecting portion attached to the opening 8 at the other end of the pipe 6, and a communication hole 10 is formed on the cleaner body 1 side of the connecting portion 9, and an electric blower built in the cleaner body 1 (not shown). No.) is connected to the intake side. Reference numeral 11 denotes an annular rib formed on the connecting portion 10 and fitted and inserted into the opening 8 of the pipe 6, 12 denotes an annular protrusion formed inside the rib 11, and the protrusion 12 will be described later. The spring 14 is attached by being fitted to the spring 14.

Reference numeral 13 denotes a bottomed tubular indicator portion slidably disposed in the pipe 6, and 14 a spring disposed in the pipe 6, one end of which is attached to the indicator portion 13 and the other. The end is attached to the projection 12 of the connecting portion 9, and the indicator 13 is biased toward the intake port 7 side of the pipe 6 to close the intake port 7.

15 is inserted into the pipe 6,
An annular locking portion fixed to the inner periphery of the substantially central portion of 16 is an annular packing 16 disposed on the indicator portion 13 side of the locking portion 15,
When the indicating portion 13 moves toward the connecting portion 9 side against the elasticity of the spring 14, the indicating portion 13 and the engaging portion 15 are interposed between the indicating portion 13 and the engaging portion 15. Is kept airtight to prevent air leakage.

Thus, when dust accumulates in the dust collecting chamber of the cleaner body 1 and the amount of air passing through the dust collecting chamber decreases, and the electric blower housing chamber becomes negative pressure, the indicator of the dust collecting meter 5 is indicated. 13
Is pushed to the outside air and slides to the side of the electric blower storage chamber to notify the user of the cleaner of the accumulated amount of dust. At this time, the outside air flowing from the intake port 7 of the pipe 6 flows into the intake side of the electric blower of the cleaner body 1 through the gap between the indicator 13 and the pipe 6, but the amount of dust in the dust collection chamber is small. Vacuum cleaner body 1
Has a relatively large suction force, and a small amount of outside air flows in from the intake port 7 of the pipe 6. Therefore, the influence of the inflowing outside air on the suction force is small.

When the dust collection chamber is filled with dust and the suction force decreases, and the amount of air passing through the dust collection chamber and flowing to the electric blower decreases, the degree of vacuum in the electric blower storage chamber increases, and the indicator unit 13 moves further to the main body 1 side of the vacuum cleaner and the locking part
Abut 15 At this time, since the packing 16 maintains the airtightness between the indicator portion 13 and the locking portion 15, the outside air flowing from the intake port 7 does not flow into the cleaner body 1, and the suction force of the cleaner body 1 is increased. Can be prevented as much as possible.

When the electric blower storage chamber becomes extremely negative in pressure, a safety valve (not shown) provided at a position for communicating the intake side of the electric blower of the cleaner body 1 and the outside air of the cleaner body 1 with each other. It is designed to prevent open air from flowing in and damage to the electric blower.

[0017]

According to the structure of the present invention, when dust is accumulated in the dust collecting chamber and the suction force of the cleaner body is reduced, the indicator moves toward the cleaner body side against the elasticity of the spring. Since it abuts on the stopper and is closely attached by the packing, the air from the intake port is prevented from flowing into the cleaner body, and the suction force of the cleaner body can be prevented from decreasing.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a dust collector showing an embodiment of the present invention.

FIG. 2 is a sectional view of the dust collecting meter when the spring is contracted.

FIG. 3 is an exploded perspective view of the dust collecting meter.

FIG. 4 is a partially cutaway view of the cleaner body.

[Explanation of symbols]

 6 Pipe 7 Intake port 8 Opening 9 Connection part 13 Indicator part 14 Spring (elastic body) 15 Locking part 16 Packing

Claims (1)

[Claims] 1. A transparent pipe communicating with the outside of the cleaner body through an intake port formed at one end, and a transparent pipe attached to the opening at the other end of the pipe to communicate the inside of the pipe with the intake side of the electric blower. Connecting part, an indicating part slidably arranged in the pipe, and an elastic body for urging the indicating part toward the intake port side of the pipe. A dust collecting meter for an electric vacuum cleaner, characterized in that a locking portion for restricting movement of the indicator portion is formed when the body is contracted, and a packing for arranging airtightness between the indicator portion and the stopper portion is provided. .