JPH05253131A - Vacuum cleaner - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] An object of the present invention is to provide an electric vacuum cleaner equipped with an air tight packing that solves air leakage in the dust collection chamber and improves air tightness. [Structure] An L-shaped projection A thicker than the thickness of the lip 12 at the tip of the lip 12 that abuts the rib body of the dust collection chamber lid 4 of the airtight packing 11 mounted on the inner wall 3a of the lower case 3 of the main body.
The structure which formed 13. Also, air tight packing 11
With the configuration in which the protrusion 14 is formed in the central portion of the inner surface that abuts the inner wall 3a of the electric vacuum cleaner, an electric vacuum cleaner capable of increasing the airtightness of the dust collection chamber 6 can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air tight packing for a dust collecting chamber of an electric vacuum cleaner.

[0002]

2. Description of the Related Art In recent years, vacuum cleaners have been increasing in suction work rate, and there has been a demand for improvement in airtightness of a dust collecting chamber.

A conventional vacuum cleaner will be described below. FIG. 4 shows the configuration of a conventional electric vacuum cleaner disclosed in Japanese Utility Model Publication No. 63-16374. As shown in FIG. 4, a main body 1 of the electric vacuum cleaner includes a main body upper case 2, a main body lower case 3, and a dust collection chamber lid 4, and a dust collection bag 5 is built in front of the main body lower case 3. It has a dust collection chamber 6, and behind it,
It has an electric blower 7 and a motor chamber 8 containing a cord winding device (not shown). The dust collection chamber lid 4 is rotatably attached to the main body upper case 2 and is opened and closed when the dust collection bag 5 is attached and detached. The front cover 9 is fixed to the main body upper case 2 and the main body lower case 3 with screws or the like, and has a connection port 10 to which a hose (not shown) can be detachably mounted. The elastic air-tight packing 11 is arranged on the outer periphery of the opening of the lower case 3 of the main body, and is sandwiched between the upper case 2 of the main body and mounted. Air tight packing 1
1 is integrally formed with an elastic lip 12 that comes into contact with the dust collecting chamber lid 4.

[0004]

However, with the above-mentioned conventional structure, in the vacuum cleaner whose suction work rate has recently been increased, the negative pressure applied to the dust collection chamber is large and the dust collection chamber lid 4 is hit. The elastic lip 12 coming into contact comes off, and the rib body in contact with the air-tight packing 11 of the lower case 3 of the main body has poor moldability, and a step is formed, which causes air leakage from the step and lowers the suction work rate. There was a problem of doing.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an electric vacuum cleaner having good suction performance by improving the airtightness of the dust collection chamber and the dust collection chamber lid. is there.

[0006]

In order to achieve this object, an electric vacuum cleaner of the present invention is arranged at the outer periphery of an opening of an inner wall provided in a lower case of a main body and is sandwiched between the upper case and a main case of the main body. In the airtight packing, an L-shaped projection A is formed at the tip of an elastic lip that abuts the rib body of the dust collection chamber lid, and a projection is formed at the center of the surface that abuts the inner wall of the airtight packing. It has a structure for forming B.

[0007]

With this structure, the protrusion A is formed at the tip of the elastic lip that abuts the rib member of the dust collecting chamber lid in the airtight packing, so that when the negative pressure is applied to the dust collecting chamber, the protrusion A is formed. It is possible to prevent A from catching on the rib body of the dust collecting chamber lid and preventing air leakage between the dust collecting chamber lid and the air tight packing.

Further, by forming the protrusion B in the center of the inner surface of the airtight packing which is in contact with the inner wall,
During operation of the electric vacuum cleaner, a force is exerted by the inner wall to push the protrusion B, the side surface of the airtight packing sandwiches the inner wall, the airtightness of the airtight packing and the inner wall is improved, and air leakage is prevented. It can be prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The same components as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 1 to 3, the airtight packing 11 is arranged on the outer periphery of the opening of the inner wall 3a provided in the lower case 3 of the main body and is sandwiched between the airtight packing 11 and the rib body of the dust collecting chamber lid 4. And hold. The airtight packing 11 is formed with an elastic lip 12 that comes into contact with the rib body of the dust collection chamber lid 4, and at the tip of the lip 12, an L-shaped protrusion A13 having a thickness b larger than the thickness a of the lip 12 is formed. have.

The inner wall 3 is attached to the air tight packing 11.
The protrusion B14 is formed in the center of the inner surface that abuts the opening of a.

The operation of the electric vacuum cleaner configured as described above will be described with reference to FIGS. If the vacuum degree in the dust collection chamber 6 rises when the electric vacuum cleaner is operated, the inner wall 3a
Causes the airtight packing 11 to be pulled inward, but the projection A13 is caught by the rib body of the dust collection chamber lid 4 to prevent the protrusion A13 from coming off, and also prevents air leakage.

The protrusion B14 is pushed by the inner wall 3a,
The side surface of the air tight packing 11 strongly sandwiches the inner wall 3a to improve airtightness and prevent air leakage.

As described above, according to the present embodiment, the protrusion A13 of the airtight packing 11 firmly adheres to the rib body of the dust collecting chamber lid 4, and the protrusion B14 strongly adheres to the inner wall 3a to improve airtightness and air leakage. Can be prevented.

[0015]

As is apparent from the above description of the embodiments, the present invention forms the projection A at the tip of the lip of the airtight packing so that when the negative pressure is applied to the dust collecting chamber, the projection A is formed. Can be prevented from being caught by the rib body of the dust collection chamber lid, and air leakage between the rib body of the dust collection chamber lid and the air tight packing can be prevented.

Further, by forming the protrusion B in the central portion of the inner surface which contacts the inner wall of the airtight packing,
When a negative pressure is applied to the dust collection chamber, the inner wall exerts a force to push the protrusion B, the side surface of the airtight packing sandwiches the inner wall, and the airtightness between the airtight packing and the inner wall is improved. It is possible to realize an excellent vacuum cleaner that is improved and can prevent air leakage.

[Brief description of drawings]

FIG. 1 is a sectional view of an electric vacuum cleaner according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the air tight packing.

FIG. 3 is a sectional view of the air tight packing.

FIG. 4 is a sectional view of a conventional vacuum cleaner.

[Explanation of symbols]

 3 Lower body case 3a Inner wall 4 Dust collection chamber lid 11 Airtight packing 12 Lip 13 Protrusion A 14 Protrusion B

Claims (2)

[Claims] 1. A structure in which an airtight packing is arranged around an opening of an inner wall provided in a lower case of a main body, wherein a thickness of the lip is provided at a tip of the lip that abuts a dust collecting chamber lid of the airtight packing. Larger thickness L-shaped protrusion A
A vacuum cleaner formed by. 2. The electric vacuum cleaner according to claim 1, wherein a protrusion B is formed at a central portion of an inner surface of the airtight packing which is in contact with the inner wall.