JPH0436779Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a vacuum cleaner for general household use, and more specifically, to a vacuum cleaner equipped with a back cover on the floor nozzle. be.

(Prior Art) A conventional vacuum cleaner of this type will be explained with reference to FIGS. 2 to 4.

Figure 2 is a perspective view showing the appearance of this type of vacuum cleaner called an upright type vacuum cleaner.
A vacuum cleaner body 2 equipped with a removable dust collection chamber 1;
A floor nozzle 3 with a vacuum cleaner main body 2 pivotably mounted to allow tilting.
and a hose 4 that connects the floor nozzle 3 and the dust collection chamber 1, and a bumper 5 is provided at the tip of the floor nozzle 3 to prevent scratches on furniture etc. during cleaning. attached.

FIG. 3 is a side cross-sectional view showing the main parts of a vacuum cleaner.
The floor nozzle 3, which is pivoted coaxially with the rotation center axis of the machine and has a bumper 5 attached to its tip, has a suction chamber 8 isolated from the front by a partition wall 7 formed integrally with the floor nozzle 3. A rotary brush 10 driven by the electric blower 6 via a belt 9 is disposed therein, and the lower surface thereof is covered with a back cover 12 in which a suction port 11 communicating with the suction chamber 8 is formed. It's on. The suction chamber 8 is kept airtight by gaskets 13 and 14 inserted between the front lower edge of the floor nozzle 3, the lower end of the partition wall 7, and the back cover 12,
Outside air is sucked in only from the suction port 11 of the back cover 12.
Further, a protective cover 15 is removably attached to prevent the belt 9 from being touched by hands while it is rotating.

FIG. 4 is a plan sectional view of the front end of the floor nozzle 3, in which the suction chamber 8 is separated by a partition wall 7 formed integrally with the floor nozzle 3 and a side partition wall 16 provided with a labyrinth packing. A hose 4 is attached to one end. The rotating brush 10 is rotatably supported at both ends by bearings 17 attached to the floor nozzle 3, and is supported by a belt 9 hung on a pulley 18 attached to one end passing through the side partition wall 16. , the rotational force of an electric blower 6 (not shown) is transmitted to the rotating brush 10.

The suction chamber 8 is formed by the labyrinth packing of the side partition wall 16 mentioned above and the packing 1 of the partition wall 7 shown in FIG.
4 and are airtightly isolated.

The operation of the vacuum cleaner configured in this way will be explained. When you turn on the vacuum cleaner,
The electric blower 6 starts operating, and the air in the suction chamber 8 of the floor nozzle 3, which is in communication with the dust collection chamber 1 through the hose 4, is sucked into the electric blower 6 and becomes a negative pressure. At the same time, the rotating brush 10 driven by the electric blower 6 via the belt 9 rotates.

The suction chamber 8, which has become under negative pressure, is airtightly isolated within the floor nozzle 3, so the back cover 1 covering the suction chamber 8
Outside air is sucked in from the suction port 11 of the hose 4.
The dust is sent to the dust collection chamber 1 through the

On the other hand, the rotary brush 10 driven by the electric motor of the electric blower 6 via the belt 9 knocks out dust from, for example, a carpet laid on the floor, so that the dust is sucked in together with the intake air.

(Problem to be Solved by the Invention) However, in such a configuration, the gasket 13 inserted between the front end of the floor nozzle 3 and the back cover 12 is susceptible to vibrations of the back cover 12 that occur during cleaning. As a result, the airtightness is lost due to friction and breakage, and outside air enters the suction chamber 8 from this area, resulting in a reduction in dust suction performance.

Furthermore, since the packings 13 and 14 are attached using an adhesive, there is a problem in that the number of assembly steps is large and the product cost is increased due to material costs and assembly costs.

The present invention solves the above-mentioned problems, and provides a vacuum cleaner that has stable performance without deterioration of dust suction performance and has reduced product cost.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a vacuum cleaner body with a built-in electric blower and a dust collection chamber,
The vacuum cleaner body is equipped with a suction chamber that communicates with the dust collection chamber, a rotating brush driven by an electric motor via a belt, and a floor nozzle to which the vacuum cleaner body is pivotably attached to the lower surface of the floor nozzle. In a vacuum cleaner, the lower end of the bumper adjacent to the back cover is made thin, and the back cover is attached to this thin part. The back cover is attached to the bottom surface of the floor nozzle so that the cover fits tightly.

(Function) With this configuration, the thin part of the bumper sticks to the back cover due to the negative pressure in the suction chamber, so airtightness is maintained even if there is no gasket in this part, and it also rotates to the back cover when the rotating brush rotates at high speed. Vibration is added, but the bumper also follows the vibration of the camera back, which reduces friction and
There is no reduction in airtightness of thin-walled parts due to vibration.

(Example) An example of the present invention will be described with reference to FIG. This embodiment differs from the above-mentioned conventional example in that the shape of the bumper and the seal attached between the front end of the floor nozzle and the camera back are removed, so the same components are given the same reference numerals. , a description of the configuration of the vacuum cleaner will be omitted.

In FIG. 1, a bumper 5 attached to surround the front end of the floor nozzle 3 has a thin wall portion 19 formed at its lower end, and is engaged with an engagement edge 20 formed at the lower front end of the floor nozzle 3. It is in close contact with the edge of the back cover 12.

The operation of the vacuum cleaner configured in this way is the same as that of the conventional example, but when the suction chamber 8 becomes negative pressure, the engaging edge 20 and the back cover 1 at the front end of the suction chamber 8
However, the thin wall portion 19 of the bumper 5 is attracted to the edge of the back cover 12 and comes into close contact with the edge of the back cover 12 to prevent outside air from entering, so that airtightness is maintained.

In addition, the vibration of the back cover 12 that occurs during cleaning,
Since the thin part 19 of the bumper 5 supports elastically,
There is no fear of friction.

(Effects of the invention) As explained above, according to the invention, the thin part of the bumper is attracted to the back cover by the negative pressure in the suction chamber, creating an airtight effect. There is no longer a need to attach it, and the bumper follows the vibrations of the back cover even when the rotating brush rotates at high speed, eliminating the reduction in airtightness of thin parts due to friction and vibration, and eliminating the friction that would occur when using conventional gaskets. There is no reduction in dust suction performance due to damage or breakage. Furthermore, since the gasket used at the front end is removed, the associated material and assembly costs are reduced, resulting in an inexpensive vacuum cleaner with stable performance.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing the main parts of the floor nozzle of the vacuum cleaner according to the present invention, Fig. 2 is a perspective view showing the external appearance of the vacuum cleaner of the present invention or the conventional vacuum cleaner, and Fig. 3 is a conventional vacuum cleaner. FIG. 4 is a side cross-sectional view showing essential parts of the floor nozzle of the present invention or a conventional planar cross-sectional view. 1... Dust collection chamber, 2... Vacuum cleaner body, 3... Floor nozzle, 4... Hose, 5... Bumper, 6... Electric blower, 7... Partition wall, 8... Suction chamber, 9... Belt, 10... Rotating brush, 11... Suction port, 12
... Back cover, 13, 14 ... Packaging, 15 ... Protective cover, 16 ... Side bulkhead, 17 ... Bearing, 1
8... Pulley, 19... Thin wall portion, 20... Engagement edge.

Claims (1)

[Scope of utility model registration request] The vacuum cleaner body has a built-in electric blower and a dust collection chamber, a suction chamber communicating with the dust collection chamber, and a rotating brush driven by an electric motor via a belt. A vacuum cleaner comprising: a floor nozzle which is pivotably mounted to be tiltable; a back cover having a suction port which is attached to the lower surface of the floor nozzle and which airtightly covers a suction chamber; and a bumper which is attached to the front end surface of the floor nozzle. A vacuum cleaner characterized in that a thin-walled portion is formed at the lower end of the bumper, and the thin-walled portion is brought into contact with the upper end of the back cover attached to the floor nozzle.