JPS6158630A - Dust indicator of electric cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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

However, as shown in the figure, when the indicator 1 is attached to the dust cover 2, the bulge of the dust bag causes the air intake port 4 to
Therefore, there is a problem in that the dust lid 2 must be provided with a rib 6 that protrudes from the air intake port 4, and there is also the problem that the space in the dust collection chamber becomes narrow due to the provision of the lip.

In addition, to prevent the dust collection bag from sticking tightly, the air intake port has three openings.
・There are cases where it is installed near the corner of the dust collection room, but this is an elbow-6
The elbow must be long, and the dust collection space is reduced due to the elbow housing.

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.

Object of the Invention The present invention solves these conventional drawbacks, and provides a dust indicator for a vacuum cleaner in which the dust indicator operates reliably without being sealed regardless of how the dust collection bag spreads due to the negative pressure of the fan motor. It provides:

Structure of the Invention The present invention includes a dust collection chamber in the front part of the main case, a dust cover arranged in the opening of the dust collection chamber so as to be openable and closable, and a dust in' indicator attached to the dust cover near the motor chamber side. By cutting out the motor compartment side of the air intake port of the indicator in a substantially U-shape, it is possible to prevent sealing due to the bulge of the dust collection bag, and by forming a flange on the end surface of the air intake port, it can be easily removed by fingers, etc. This is to prevent it from coming off.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to 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 6 containing a fan motor 4 on the rear side partitioned by a partition wall 3.

A front cover 6 is disposed at the front of the dust collection chamber 2 and is fixed to the main case 1, and has a suction lower 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.

At the rear of the dust lid 10, there is a device for detecting the amount of collected dust.
A dust indicator 12 is arranged, and a handle 3 for carrying the dust lid 12 is formed on the front part.
The front part of the one-piece case 1 is formed to match the handle 14, and 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 urchin 15 is attached to the rear upper part of the main body case 1, so that the fan motor 4 and the cord winding device (
(not shown).

16 is a bumper, which includes the main body case 1 and the body urchin 16;
and the dust cover 10.

17. 18 is a cuff nozzle and a skimmer nozzle placed on the upper part of the main case 1, and a cuff nozzle 19 that can be opened and closed freely.
The top surface has a clean surface with no irregularities.

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

Next, the arrangement of the dust indicator 12 will be explained with reference to FIGS. 4 to 6. As shown in the back view of the dust cover o in Figure 3, the dust indicator is located in its storage section 22.
is arranged near the motor chamber 6 side, and a cylindrical pressure intake port 23 for communicating the dust indicator 12 and the dust collection chamber 2 is provided on the lower surface of the storage section 22.

In addition, FIG. 5 shows a cross-sectional view of a part of the dust indicator shown in FIG.
are connected by an indicator elbow 24.

Furthermore, the cylindrical pressure intake port 23 has a notch 26 with a U-shaped cross section on the motor chamber 5 side, and a flange 2 on the lower end surface having an inner diameter smaller than the inner peripheral surface of the pressure intake port 23.
6 is a provision.

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. is dust collection room 2
As the dust bag spreads out in contact with the inner wall and the amount of dust increases, the dust collection bag comes into close contact with the inner wall. Dust bag 8 here
In order to prevent heat generation due to the air resistance of the fan motor 4 and the decrease in cooling air, the dust indicator 1 is
2 is attached. The dust indicator 1
2, the negative pressure inside the dust collection chamber increases.

Then, the indicator spring 28, which was being held down by the indicator spring 2, is moved to the indicator elbow 24.
arrow C due to the negative pressure transmitted through the air intake port 23.
The ventilation path that was closed by the indicator seal 28 and indicator cap 29 is opened, the flow rate in the dust collection chamber 2 increases, and heat generation of the fan motor can be prevented. Here, as mentioned above, as the dust increases, the dust collection bag 8 comes into close contact with the wall of the dust collection chamber, so the lower end surface of the pressure intake port 23 is closed by the dust collection bag 8, and the dust indicator 12 does not operate. However, by providing the cutout 25 with the U-shaped cross section, no matter how much the dust collection bag swells, the pressure intake port 23 will not be sealed, and the dust indicator 12 will operate, so the fan The motor 4 will not be destroyed by heat generation.

Further, by providing the cutout portion 25 on the motor chamber 6 side, a part of the dust indicator can smoothly receive the air sucked by the fan motor 4.

Furthermore, the dust lid 1o is removed from the main case 1 when replacing the dust collection bag, but at this time, the lower surface of the dust indicator storage section 22 on the back side of the dust lid 10 comes out, and the pressure intake port 23 and the dust indicator elbow-24
If the fitting part of the indicator elbow 24 is placed in a place within the reach of a person's hands and pressed with a finger, the indicator elbow 24 may come off. By forming the inlet 23 with a material smaller than the inner circumferential surface, the indicator elbow 24 is formed with the flange 2.
6 from the outside, even if you insert your finger into the pressure intake port 23, the indicator elbow 24
The dust indicator will not be 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 a cutout portion having a 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 there is no damage caused by heat generation of the fan motor. 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 flange on the lower end of the cylindrical pressure intake that is smaller than the inner circumference of the pressure intake, even if a person's finger is inserted from the outside of the pressure intake, it will not touch the indicator elbow. Because there is no fitting between the inner surface of the pressure intake port and a part of the elbow, it becomes a force, and it also causes a misalignment of the fitting. 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, we were able to increase the dust collection space in the dust collection chamber because there was no lip to prevent the paper bag from coming into close contact with the pressure inlet on the back of the dust lid.

[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. 4 is a back view of the main parts. , 6th
The figure is a BB sectional view in FIG. 4. 1... Main case, 2... Dust collection chamber, 4...
Fan motor, 8...Dust collection bag, 10...
・Dust lid, 12...Dust indicator, 2
3. River...Pressure intake.

Claims (2)

[Claims] (1) Equipped with a motor chamber equipped with a fan motor at the rear of the main case, an upwardly opening dust collection chamber with a dust collection bag installed at the front, and a lid that can be opened and closed at the opening of this dust collection chamber, A housing part for a dust indicator operated by the negative pressure of the fan motor and a cylindrical pressure intake port for communicating the dust indicator with the dust collection chamber are arranged near the motor chamber side of the lid, and the cylindrical pressure intake port A dust indicator for a vacuum cleaner that has a substantially U-shaped notch on the motor chamber side of the vacuum cleaner to prevent the pressure intake port from being blocked by a dust collection bag. (2) The dust indicator for a vacuum cleaner according to claim 1, wherein the cylindrical pressure intake has a flange at the lower end thereof which is smaller than the inner peripheral surface thereof.