JPS6324846Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a floor nozzle for a vacuum cleaner having a rotating brush.

Structure of conventional example and its problems Figures 1 and 2 show a conventional example of this type of floor nozzle for a vacuum cleaner. A suction chamber 3 with an air turbine 2 installed therein is formed at the front, and a turbine chamber 5 with an air turbine 4 inside is formed at the rear.
Further, these two chambers 3 and 5 communicate with each other through a vent 6. When you run the vacuum cleaner, its suction power will fill the suction chamber 3.
Air flows into the air from the ventilation port 6 to the turbine chamber 5, and the air turbine 4 rotates. This rotation is then transmitted to the rotating brush 2 via the belt 7. Further, the floor nozzle main body 1 is provided with a passage 8 that bypasses the air turbine 4, and this passage 8 can be opened and closed by a switching plate 9.
Therefore, if the surface to be cleaned does not require rotation of the rotary brush 2, such as folding, the switching plate 9 can be operated to open the passage 8, bypassing the air, and stopping the air turbine 4. good.

A suction port 10 is opened at the lower part of the suction chamber 3, and the cavities 12 and 13 for housing the bearings 11 at both ends of the rotating brush 2 and the belt 7 are located on the walls 14 and 15.
It is separated from the suction port 10 by. In order to rotate the rotating brush 2, gaps 16 and 17 are formed between the rotating brush 2 and the holes in the walls 14 and 15.

In the case of such a floor nozzle, dust, especially line dust,
Dirt such as lint is scraped up from the surface to be cleaned by the rotating brush 2 and sucked into the vent 6, but some of it enters the spaces 12 and 13 through the gaps 16 and 17 and becomes entangled with the bearing 11. , rotating brush 2
The rotation of the rotating brush 2 becomes so heavy that sufficient cleaning cannot be performed, or it gets tangled with the belt 7 and is carried to the air turbine 4 side, and gets tangled with the driving part of the belt 7, which also reduces the rotation of the rotating brush 2 and reduces the cleaning ability. There were flaws.

Purpose of the invention This invention eliminates these conventional drawbacks, and prevents dust such as cotton dust and lint from entering the rotating brush bearing, especially the belt drive side, and reduces the rotational force of the rotating brush. This prevents the cleaning ability from decreasing due to

Structure of the invention The floor nozzle of the invention has a built-in rotating brush, and a suction chamber with a suction port opened at the bottom, and a chamber containing a rotating brush bearing and a rotating brush drive unit is partitioned through a wall on both sides of the suction chamber. Ribs are provided from these walls to protrude toward the suction port, and a gap is provided between the ribs and the bottom of the floor nozzle body. Therefore, air containing dust, so-called dust-containing air, flows toward the center of the suction port by the action of the ribs, thereby preventing it from entering the bearing section. Further, by setting a gap between the rib and the bottom of the floor nozzle body, this gap also becomes a substantial suction portion, and therefore, the suction performance can also be improved.

Description of examples The embodiments will be described above with reference to the accompanying drawings.

In FIG. 3 and FIG. 4, 21 is a floor nozzle main body, in front of which is a suction chamber 23 in which a rotating brush 22 is installed, and in the rear of this suction chamber 23 is a turbine chamber 25 in which an air turbine 24 is built. It is provided. A connecting pipe 26 that connects to the suction side of the vacuum cleaner is provided at the rear of the turbine chamber 25, and a partition wall 27 is formed between the turbine chamber 25 and the suction chamber 23. And this partition wall 27 has a turbine 2
A vent 28 facing the turbine 4 and a vent 30 opening into a passage 29 bypassing the turbine 24 are provided. Reference numeral 31 denotes a switching plate slidably provided to open and close the vent 30. A suction port 23' is opened at the bottom of the suction chamber 23, and is configured to suck in dust from this portion. At both ends of the suction chamber 23, there are chambers 34 for storing a bearing 32 of the rotating brush 22 and a belt 33 for driving the rotating brush 22.
35 are separated by walls 36 and 37. The rotating brush 22 moves between the walls 36 and 37 through the gaps 38 and 39.
It is rotatably penetrated at the center. Suction port 23'
is defined by ribs 40 and 41 that project approximately horizontally from the walls 36 and 37, and these ribs 4
0 and 41 are located somewhat above the bottom 42 of the floor nozzle body 21.

In the above configuration, when the vent 30 is closed by the switching plate 31 and the vacuum cleaner is operated to clean a carpet or the like, air flows from the suction port 23' to the suction chamber 23 to the vent 28 to the turbine chamber 25. The suctioned air collides with the air turbine 24 on the way and causes it to rotate. This rotation is then transmitted to the rotating brush 22 via the belt 33.

The next time you clean a fold, etc., operate the switching plate 31 to open the vent 30, and most of the intake air will flow into the vent 30, which has a larger cross-sectional area.
Air turbine 24 does not rotate.

By the way, since the ribs 40 and 41 are provided, the airflow flows from both ends of the floor nozzle toward the center of the nozzle, as shown in FIG. This prevents the dust from getting entangled with the bearing 32 of the rotating brush 22 and the belt 33. Therefore, the rotation of the rotating brush 22 becomes heavy and there is almost no possibility that the cleaning performance is degraded.

In particular, if the ribs 40, 41 are spaced apart above the bottom 42 of the floor nozzle body 21, the airflow
As shown in the figure, air flows more easily from both ends of the floor nozzle body 21 toward the center, which is more effective in preventing air from going around to the back side of the ribs 40, 41. Also, it is best to keep it away from the bottom 42, and for normal household dust, it was most effective to keep it at a distance of about 1 mm to 3 mm.

By providing ribs from both ends of the suction port, dirt can be prevented from entering the bearing and drive parts.
It is possible to provide a floor nozzle with good rotatability of the rotating brush forever.

It is preferable to provide the ribs at both ends of the suction port, but it is particularly effective to provide the ribs on the side where the belt is installed.

Effects of the invention As described above, according to the invention, the flow of suction air is changed to prevent dirt from entering the bearing and drive parts of the rotating brush, and as the brush is used, the rotation decreases and the cleaning performance deteriorates. It is possible to prevent this.
Further, since the lower part of the rib is also utilized as a suction part, the provision of the rib does not reduce the dust suction performance, thereby making it possible to provide a floor nozzle with excellent performance.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a conventional floor nozzle, Figure 2 is a partial cross-sectional view of the same, Figure 3 is a cross-sectional view of a floor nozzle according to an embodiment of the present invention, and Figure 4 is a cross-sectional view of the same essential part. . 21... Floor nozzle body, 22... Rotating brush,
23'... Suction chamber, 34... Suction port, 36, 37
...Wall, 40,41...rib.

Claims (1)

[Scope of utility model registration request] A suction chamber with a built-in rotating brush and a suction port at the bottom is partitioned with a wall on both sides of the suction chamber that houses the rotating brush bearing and the rotating brush drive unit, and a wall protrudes from these walls toward the suction port. A floor nozzle for a vacuum cleaner, which is provided with a rib and a gap is set between the rib and the bottom of the floor nozzle body.