JPS6194624A - Floor nozzle 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 the Invention The present invention relates to a floor nozzle for a vacuum cleaner having a rotating brush driven by a turbine.

Conventional configuration and its problems In the floor nozzle of this type of vacuum cleaner, the rotational speed of the turbine changes depending on the amount of air sucked in, so when the floor nozzle is lifted above the surface to be cleaned, the amount of suction air increases. Turbine speed increases. As a result, the turbine and rotating brush rotate at high speed, which increases noise and causes severe wear on the bearings of the turbine and rotating brush, resulting in a shortened lifespan.

As a way to solve this problem, a bypass is installed that opens when the floor nozzle is lifted above the surface to be cleaned, and a portion of the suction airflow passes through the bypass, reducing the amount of air that impinges on the turbine. There is a way to reduce the rotation speed, but when the bypass is opened, a cutting sound is generated when air passes through the bypass.
This was a negative factor in reducing noise.

Purpose of the Invention The present invention solves the above-mentioned problems. When the floor nozzle is lifted above the surface to be cleaned, the number of revolutions (rotational speed) of the turbine and rotating brush is lowered and the floor nozzle is lifted without providing a bypass. In addition to reducing the noise generated when the engine is operated, it also reduces wear on the bearings of the turbine and rotating brush, thereby extending the life of the bearings.

Structure of the Invention The present invention provides an air guide that is movable up and down in the turbine chamber, and urges this air guide downward by its own weight or a spring. , the air passage in the turbine chamber narrows and most of the suction air collides with the turbine, resulting in a high turbine output. However, if the floor nozzle is floated by the entire surface to be cleaned, the position of the air guide is lowered and the turbine chamber is Since the air passage becomes wider, the suction air passes through many passages other than the turbine, which reduces the rotational speed of the turbine, resulting in a floor nozzle with low noise and fewer bearings for the turbine and rotating brush. be.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a floor nozzle body, in which a suction chamber 3 containing a rotating brush 2 and a turbine chamber 6 containing a turbine 4 are partitioned by a wall 6. The rotating brush 2 is rotatably attached within the suction chamber 3, and has brush bristles 7 protruding from a suction port 8 to the outside. The turbine 4 is rotatably supported within the turbine chamber 5 by passing a shaft 9 protruding from the turbine 4 through a bearing 10 fixed to the floor nozzle body 1. A belt 11 is stretched around a large pulley 2' formed integrally with the tip of the shaft 9 and the rotating brush 2. A small communication port 1 is provided in the wall 6 at a position facing the turbine 4.
2. A large communication port 13 is provided at a position not facing the turbine 4, and the large communication port 13 is opened and closed by a lid 15 provided integrally with the switching lever 14.

16 is a connecting body rotatably attached to the turbine chamber 5;
A connecting pipe 17 communicating with the turbine chamber 5 is provided, and an air guide 18 is provided below the turbine 4 so as to be movable up and down, and its movement is guided by a support lip 19.

A roller 20 is rotatably provided on the lower surface of the air guide 18 to improve sliding on the surface to be cleaned. The air guide 18 of the roller 2o that protrudes from the lower surface of the floor nozzle is lowered by its own weight, and is prevented from coming off the floor nozzle main body 1 by a stopper 21.

In the above configuration, when cleaning a carpet or the like, the switching lever 14 is operated to close the large communication port 13 with the lid 15. Then, the suction air that entered through the suction port 8 enters the turbine chamber 5 through the small communication port 12 and collides with the turbine 4. After the turbine 4 is rotated, the connection pipe 17 is passed through the extension pipe, then the hose, and then the vacuum cleaner body.

The rotation of the turbine 4 is transmitted to the rotating brush 2 via the belt 11, and as the rotating brush 2 rotates, it scrapes up lint and the like stuck to the carpet and exhibits excellent dust collection performance.

When cleaning the floor, tatami mats, etc., the large communication port 13 is opened. Then, most of the suction air enters the turbine chamber 5 through the large communication port 13, does not collide with the turbine 4, and passes through the connecting pipe 17 to reach the cleaner body.

At this time, some suction air enters the turbine chamber 5 from the small communication port 12, but since the amount is small, even if it collides with the turbine 4, it does not rotate the brush 2, which is linked to the turbine 4. Does not rotate.

Therefore, floors, tatami mats, etc. can be cleaned without damaging them by the rotation of the rotary brush 2. Incidentally, since the dust on the floor and the folding surface can be sufficiently captured by the suction force alone, there is no need to rotate the rotating brush 2.

Now, when cleaning a carpet or the like, the turbine 4 is rotated, but if the floor nozzle is raised above the surface to be cleaned, the suction air 75 that enters from the suction port 8 increases.

In the present invention, when the floor nozzle is lifted above the surface to be cleaned, the air guide 18 provided below the turbine 4 is lowered by its own weight. Therefore, the air passage below the turbine 4 is widened, and the area of the passage other than the air passage colliding with the turbine 4 is widened.

In other words, the amount of air that collides with the turbine 4 decreases, and the amount of air that passes through the suction turbine 4 without colliding with it increases.

Therefore, the output of the turbine 4 does not increase much, and even if the floor nozzle is raised above the surface to be cleaned, the rotation speed of the p-bin 40 does not increase much.

Therefore, noise does not increase, and since the rotational speeds of the turbine 4 and the rotating brush 2 do not increase so much, there is less wear on the bearings, and the life of the bearings can be extended.

In addition, even if the turbine 4 gets stuck with foreign objects such as glass fragments or pebbles and stops rotating, floating the floor nozzle and lowering the air guide 18 will enlarge the passage below the turbine 4, making it easier to remove the stuck foreign objects. The turbine 4 can be rotated again.

In the present invention, the air guide 18, which can move vertically, is located below the turbine 4, but it is not limited to this position. Part of the port may be opened and closed, and the point is that when the air guide 18 is lowered, the air passage that does not collide with the turbine 4 can be widened.

Effects of the Invention As described above, the present invention provides a vertically movable air guide in the turbine chamber, and supports this air guide by its own weight or by a spring or the like (
(The lower part of the air guide protrudes from the lower surface of the floor nozzle, so when the lower surface of the floor nozzle is in contact with the surface to be cleaned, the air guide is in the upper position, and the air guide is in the upper position.) Most of the air collides with the turbine, resulting in a high turbine output, but if the floor nozzle is raised above the surface to be cleaned, the position of the air guide is lowered and the turbine is heated.

Since the air passage that does not collide with the engine is widened, the rotational speed of the turbine does not increase even if the amount of suction air increases, so even if the floor nozzle is floated, there is low noise and the bearings of the turbine and rotating brush are not worn out, resulting in a long service life. You can get a long floor nozzle.

[Brief explanation of the drawing]

FIG. 1 is a plan sectional view of a floor nozzle of a vacuum cleaner according to an embodiment of the present invention, and FIGS. 2 and 3 are side sectional views of the same. 1... Floor nozzle body, 2... Rotating brush, 4... Turbine, 6... Ta, - pin chamber, 18... Air guide, 20...
・Roller (lower surface of air guide).

Claims (1)

[Claims] A vertically movable air guide is provided in the turbine chamber of the floor nozzle body that houses a rotating brush and a turbine that is the driving source for this rotating brush. A floor nozzle for a vacuum cleaner that protrudes further and changes the air passage area of the turbine chamber by vertical movement of an air guide.