JPH0449415B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a main case having a dust collection chamber, in which a dust indicator operated by negative pressure of a fan motor is disposed on a dust lid covering an opening of the dust collection chamber. The invention relates to vacuum cleaners.

Conventional configuration and its problems Conventionally, in a vacuum cleaner in which a dust cover is installed at the opening of the main case with a dust collection chamber at the front, the dust indicator 1 operated by the negative pressure of the fan motor is shown in Fig. 1. As shown, the dust lid 2
It is common to have an indicator storage section 3 and an air intake port 4 that communicates the indicator storage section 3 with a dust collection chamber.

However, as shown in the figure, when the indicator 1 is attached to the dust lid 2, the air intake port 4 is blocked by the bulge of the dust collection bag, so a rib 5 that protrudes from the air intake port 4 is provided on the dust lid 2. In addition, there is another problem that the provision of the ribs narrows the space in the dust collection chamber.

In addition, in order to prevent the dust collection bag from sticking tightly together, there are examples in which the air intake port is placed near the corner of the dust collection chamber, but this requires the elbow 6 to be longer, and the dust collection space is reduced due to the elbow storage part. It is becoming.

Furthermore, since the elbow 6 is installed inscribed in the air intake port, there is a problem that the indicator 1 may come off by inserting a finger or the like into the air intake port from the back side of the dust cover 2.

Purpose of the Invention The present invention solves these conventional drawbacks, and uses the negative pressure of the fan motor to prevent the dust indicator from being sealed regardless of how the dust collection bag spreads, and to prevent the dust indicator from being sealed by the user's finger from the back side of the dust cover. To provide a dust indicator for a vacuum cleaner that does not easily enter the indicator housing.

Composition of the Invention The technical means of the present invention to achieve the above object is to provide a cylinder which communicates a dust indicator operated by negative pressure of a fan motor with a dust collection chamber and has a substantially semicircular flange at its lower end opening. A shaped pressure intake port is provided to protrude toward the dust collection chamber, and a substantially U-shaped notch is formed in the protrusion.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below based on the accompanying drawings. In FIGS. 2 and 3, reference numeral 1 denotes a main case having an upwardly opening dust collection chamber 2 on the front side and a motor chamber 5 containing a fan motor 4 on the rear side partitioned by a partition wall 3.

6 is placed in the front part of the dust collection chamber 2, and the main case 1
A front cover is fixed to the front cover and has a suction port 7 to which a hose (not shown) is connected.

A dust collection bag 8 is attached to the dust collection chamber 2 with a buckle 9, and a removable dust lid 10 is attached to the upper opening and is locked with a buckle 11.

A dust indicator 12 for detecting the amount of collected dust is arranged at the rear of the dust lid 10, a handle 13 for carrying the dust lid 10 is formed at the front, and a handle 14 formed at the front of the main case 1 is provided with a handle 13 for carrying the dust lid 10. By attaching the dust cover 10 to the main case 1, a handle as a main body of the vacuum cleaner is formed.

A body wafer 1 is disposed above the rear part of the main body case 1.
By attaching the fan motor 4 and the cord winding device (not shown), the fan motor 4 and the cord winding device (not shown) are internally held.

A bumper 16 is installed between the main case 1, the body wafer 15, and the dust cover 10.

Reference numerals 17 and 18 denote a tanner nozzle and a skimmer nozzle placed on the upper part of the main case 1, which are further covered with a cover 19 which can be opened and closed, and whose upper surface is formed into a clean surface without irregularities.

Reference numerals 20 and 21 are front wheels and rear wheels for movement disposed at the lower part of the main case 1.

Next, the arrangement of the dust indicator 12 will be explained with reference to FIGS. 4 and 5. As shown in the back view of the dust lid 10 in FIG. An entrance 23 is provided on the lower surface of the storage section 22.

Further, FIG. 5 shows a cross-sectional view of the dust indicator part in FIG. 4, and the dust indicator 12 and pressure intake port 23 are
connected by.

Furthermore, the cylindrical pressure intake port 23 is provided with a notch 25 having a substantially U-shaped cross section on the motor chamber 5 side, and a substantially semicircular flange 26 that partially closes the lower end opening.

Next, the function of the dust indicator will be explained. As mentioned above, in this vacuum cleaner, dust is collected in the dust collection bag 8 in the dust collection chamber by the suction force of the fan motor 4 installed in the motor room 5.
At this time, the dust bag 8 spreads out in contact with the inner wall of the dust collection chamber 2, and as the amount of dust increases, the dust bag comes into close contact with the inner wall. Dust accumulates in the dust collection bag 8 and the suction flow rate to the dust collection chamber 2 decreases, so a dust indicator 12 is installed to prevent heat generation due to the air resistance of the fan motor 4 and the decrease in cooling air. ing. In the dust indicator 12, when the negative pressure in the dust collection chamber increases, the indicator spring 28, which is held down by the indicator spring 27, is activated in the direction of arrow c by the negative pressure transmitted through the indicator elbow 24 and the air intake port 23. and the indicator cap 28 and the indicator cap 29.
The ventilation path that was previously closed is opened, the flow rate inside the dust collection chamber 2 increases, and heat generation of the fan motor can be prevented. Here, as described above, the dust collection bag 8 comes into close contact with the wall of the dust collection chamber as the amount of dust increases, so the lower end surface of the pressure intake port 23 is closed by the dust collection bag 8, and the dust indicator 12 is turned off. Although it may not operate, the cutout portion 2 having a substantially U-shaped cross section
5, no matter how much the dust bag swells, the pressure intake port 23 will not be sealed and the dust indicator 12 will operate, so the fan motor 4 will not be destroyed by heat generation.

Further, by providing the cutout portion 25 on the motor chamber 5 side, the dust indicator portion can smoothly receive the wind sucked from the fan motor 4.

Furthermore, the dust lid 10 is removed from the main case 1 when replacing the dust collection bag, but at this time, the dust indicator storage section 2 on the back of the dust lid 10 is removed.
2, the bottom surface of the dust indicator elbow 24 is exposed, and the fitting part between the pressure intake port 23 and the dust indicator elbow 24 is exposed within the reach of a person's hands, and the indicator elbow 24 may come off by pushing with a finger. As described above, by forming the flange 26 in a substantially semicircular shape on the lower end surface of the pressure intake port 23, the indicator elbow 24 is covered from the outside by the flange 26, so even if a finger is inserted through the pressure intake port 23, The indicator elbow 24 is not pushed into the storage section 22, and malfunction of the dust indicator can be prevented.

Effects of the Invention As described above, according to the present invention, dust is collected in the dust collection bag in the dust collection chamber by the suction force of the fan motor, and even if the dust collection bag swells and comes into close contact with the wall of the dust collection chamber, By providing the cutout portion having a substantially U-shaped cross section in the cylindrical pressure intake port, the pressure intake port is prevented from being sealed by the dust collection bag. As a result, the dust indicator operates completely without any malfunction in response to an increase in negative pressure in the dust collection chamber, so no damage occurs due to heat generation of the fan motor.In addition, the above-mentioned notch is provided on the motor chamber side. This allows the suction air flow from the fan motor to be smoothly transmitted to the dust indicator, preventing the dust indicator from malfunctioning.

Furthermore, by forming a substantially semicircular flange on the lower end surface of the cylindrical pressure intake, even if a person's finger is inserted from the outside of the pressure intake, it will not touch the indicator elbow, so the pressure can be taken out. The fit between the inner surface of the inlet and the elbow part will no longer come loose.
And due to misalignment. Since there is no air leakage from that area, it is now possible to prevent the dust indicator from malfunctioning.

As a result of the above, there is no longer a need for a rib to prevent the paper bag from coming into close contact with the area near the pressure intake port on the back of the dust lid, making it possible to increase the dust collection space in the dust collection chamber.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional example, FIG. 2 is an external view of a dust indicator for a vacuum cleaner showing an embodiment of the present invention, FIG. 3 is a sectional view, and FIG.
The figure is a rear view of the main part, and Figure 5 is B-B in Figure 4.
FIG. 1...Main case, 2...Dust collection chamber, 4...Fan motor, 8...Dust collection bag, 10...Dust lid,
12...Dust indicator, 23...Pressure intake port.

Claims (1)

[Claims] 1. A main case with a built-in fan motor and a dust collection chamber with an upward opening formed on the suction side for installing a dust collection bag, a dust lid that covers the upper opening of the dust collection chamber so as to be openable and closable, and the electric blower. The dust indicator is provided on the dust lid and is operated by the negative pressure of the fan motor, and the dust indicator communicates with the dust collection chamber. A dust indicator for a vacuum cleaner, which includes a cylindrical pressure intake port having a flange that protrudes toward the dust collection chamber, and a substantially U-shaped notch provided in the protrusion.