JP3127553B2 - Electric 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 vacuum cleaner having a lid and a tight packing provided on a wall surface of a dust collecting chamber for engaging with a dust collecting bag provided in the dust collecting chamber.

[0002]

2. Description of the Related Art Conventionally, a public utility model (Showa 62-1179) has been proposed.
As shown in FIG. 51), rubber is provided on the dust collecting bag 2 provided in the dust collecting chamber 1 of FIG. 5 and the wall surface 5 of the dust collecting chamber 1 corresponding to the hole 4 provided in the opening frame 3 of the dust collecting bag 2. As shown in FIG. 6, a tight packing 6 made of an elastic material such as an elastic body is provided. The tight packing 6 includes a cylindrical body 6a having a hole diameter of the opening frame 3 of the dust collecting bag 2 or having a compression allowance. It was common to have check valves 6b to 6e formed inside the body 6a and opened and closed in four directions: left, right, up and down.

[0003]

However, in the vacuum cleaner provided with the tight packing 6 as described above, when the hose (not shown) is connected, the four check valves 6b to 6e are connected by arrows shown in FIG. The hose is pushed out in the direction A and communicates with the dust bag 2, but when the hose is suddenly pulled out of the tight packing 6 while cleaning and after operating the vacuum cleaner, the check valves 6b to
6e is an arrow B against the flow of wind sucked into the dust collection chamber 1.
Try to return to the direction.

At this time, since the check valves 6b to 6e equally divided as shown in FIG. 6 simultaneously return so as to close the inflow passage, the flow passage area becomes smaller between the check valves 6b to 6e. Is rapidly reduced to the flow path area formed by the gap T provided in the first check valve 6b, adjacent check valves 6b to 6e resonate with each other, and an abnormal sound (booming sound) due to the resonance of the check valves 6b to 6e. And give the user a sense of abnormality.

The present invention has been made to solve the above-mentioned problems, and by staggering the return timings of a plurality of check valves at the time of drawing out a hose , it is possible to prevent a rapid narrowing of a flow passage area and to form a phase. It is an object of the present invention to provide a vacuum cleaner that eliminates resonance between check valves and eliminates abnormal noise caused by the check valves.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a dust collecting chamber provided with an openable and closable lid.
A dust bag having a frame is provided, and a hole provided in a mouth frame of the dust bag is provided.
Is there an elastic body such as rubber on the dust collection chamber or lid wall corresponding to
The tight packing is provided.
A cylindrical body that engages with the hole in the mouth frame of the dust bag, and a
With multiple check valves that open and close in different directions.
The area of the check valve that receives the suction air is different .

[0007]

According to the present invention, when the hose fitted with the tight packing is pulled out during cleaning,
When multiple check valves installed in tight packing against the flow of wind return in the direction to close the opening, adjacent check valves
By making the areas of the valves that receive the suction air different, the timing can be shifted so that the check valves that attempt to return against the wind caused by the suction do not return at the same time. The occurrence can be prevented.

[0008]

An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1 to FIG. 4, the lower body 10 has a dust collection chamber 11 at the front and a motor chamber 13 at the rear via a partition 12.
, And a transfer roller 15 is mounted on the rear side surface of the caster roller 14 on the front bottom surface. In the motor chamber 13, a fan motor 16 is provided with a support 17 made of rubber or the like.
And 18 are sandwiched between the lower body 10 and the upper body 19 which covers the motor chamber 13 from above.

A front cover 20 fixed by screws or the like is provided at the front of the dust collection chamber 11 and a connection hole 21 for connecting a hose is integrally formed. A tight packing 22 made of an elastic body such as rubber and provided with an opening communicating the connection hole 21 and the dust collection chamber 11 is pressed and held therebetween.

The tight packing 22 has a circular cylindrical body 22a for tightening in the radial direction, a disk lip 22b on the outer periphery, and check valves 22c to 22c on the inner side.
h is provided integrally, and the lower body 10 is
i, and as shown in FIG.
~22h is at least one of the non-return valve that becomes phase suction
The areas receiving the wind are arranged so as not to be the same, for example, check valves 22d and 22d which are phases of check valve 22c.
h is set to have a smaller area than the check valve 22c.

Further, the dust collecting chamber 11 is provided in the dust collecting chamber 11.
1 is provided with a dust collecting bag 24 integrally adhered to an opening frame 23 having an opening to be detachably fitted to a cylindrical body 22a of a tight packing 22 protruding into the inside of the body.
The upper part is held by a bag opening support 26 rotatably provided in the dust collecting chamber 11, and the upper part of the dust collecting chamber 11 is covered by a lid 27 which can be opened and closed.

In the above configuration, dust sucked through the hose by the fan motor 16 passes through the front cover 20 and the tight packing 22, is collected in the dust bag 24, and only clean air is discharged from the rear.

Next, the operation of the tight packing 22 mounted in the dust collecting chamber 11 in the above configuration will be described.

As shown in FIG. 3, the tight packing 22
The connection hole 21 of the front cover 20 and the dust collection bag 24 are held between the dust collection chamber 11 and the front cover 20, and the hose 28 is inserted and fitted in the direction of arrow C to thereby check the check valves 22c to 22c. 22h are radial arrows D
It can be pushed in any direction.

Here, when the hose 28 is pulled out from the main body of the vacuum cleaner in the direction of arrow E while the vacuum cleaner is operating, the above-described check valves 22c to 22h are moved in the direction of arrow F so that the connection holes 21 are closed.
In the direction, it returns against the flow of the wind due to suction, but as described above, the areas receiving the suction wind of the check valves 22c to 22h are not the same, so that they are not the same. The check valve having a large area receives the wind resistance at the time of return from the check valve having a small area , so that the return time can be shifted. As a result, it is possible to prevent the resonance between the two activators caused by the simultaneous return of the check valves in the phase, and to prevent the abnormal sound caused by the resonance of the check valve when the hose is pulled out.

Further, in this embodiment, at least one of the areas of the check valves having different phases is not the same. However, as shown in FIG. By making the thicknesses of the non-return valves T1 and T2 different from each other in the phase at 29d to make the masses of the non-return valves the same, the non-return valve is heavier due to the mass difference as in the case of making the above-mentioned area different. The same effect can be obtained by preventing the simultaneous return of the check valves that are in phase by eliminating the return of the check valves at the same time and eliminating the resonance of the check valves.

[0017]

As described above, according to the present invention, a plurality of non- return members are provided on the tight packing which mediates the dust collecting chamber and the front cover.
A valve is formed, and the area of the adjacent check valve that receives suction air differs.
When the hose is pulled out from the vacuum cleaner during operation, the return timing of the check valve, which is the phase of each check valve that returns to close the dust collection chamber, can be shifted. The check valves resonate with each other due to the wind generated by the airflow, and do not generate abnormally high resonance noise.

[Brief description of the drawings]

FIG. 1 is a component diagram of a vacuum cleaner showing one embodiment of the present invention.

FIG. 2 is a sectional view of a vacuum cleaner showing one embodiment of the present invention.

FIG. 3 is a sectional view of a vacuum cleaner showing an embodiment of the present invention.

FIG. 4 is a component diagram showing another embodiment.

FIG. 5 is a sectional view of a vacuum cleaner showing a conventional example.

FIG. 6 is a component diagram of a vacuum cleaner showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Dust collection chamber 22 Tight packing 22a Cylindrical body 23 Port frame 24 Dust collection bag 26 Bag mouth support 27 Cover

Continuation of the front page (72) Inventor Hiroshi Nakamoto 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. , U) (58) Field surveyed (Int. Cl. ⁷ , DB name) A47L 9/10

Claims (1)

(57) [Claims] 1. A dust-collecting bag provided with a mouth frame is provided in a dust-collecting room provided with an openable / closable lid, and a dust-collecting chamber or a wall of the lid corresponding to a hole provided in the mouth frame of the dust-collecting bag is provided . A tight packing made of an elastic material such as rubber is provided. The tight packing is provided with a cylindrical body which is engaged with a hole of a mouth frame of the dust collecting bag, and a plurality of check valves which are formed inside the cylindrical body and open and close in different directions. Vacuum cleaner with valves and different areas for receiving suction air from adjacent check valves.