JPS645890B2 - - Google Patents

Description

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

Conventional Structure and Problems Conventionally, the rotary brush of the floor nozzle in this type of vacuum cleaner has been provided with a pulley portion for transmitting rotation at its longitudinal end. However, with this configuration, the pulley portion causes some areas where there is no brush body at the end of the rotating brush, making it impossible to reliably clean the corners of the room.

Therefore, recently, it has been considered to provide a pulley part in the middle of the rotating brush in the longitudinal direction, avoiding the end part of the rotating brush.

Figure 1 shows a concrete example of this, namely:
A rotating brush 1 is installed inside a floor nozzle body 2, and a part of the brush body 3 projects from a suction port 5 formed in a bottom plate 4. Reference numeral 6 denotes a pulley portion provided on a portion of the rotating brush 1 in the longitudinal direction, and 7 a belt for transmitting the rotational force of a drive source such as a motor to the rotating brush 1, which is stretched around the pulley portion 6. Reference numeral 8 denotes inner and outer ribs 9 and 1 protruding from the floor nozzle body 2 and the bottom plate 4, with the pulley portion 6 intervening as a packing that abuts on the circumferential surface of the rotating brush 1.
It is held between 0 and 0.

The packing 8 prevents dust scraped up into the floor nozzle body 2 by the rotating brush 1 from entering the pulley portion 6, and prevents the transmission of rotation to the rotating brush 1 via the belt 7. This is to ensure that.

Incidentally, the rotating brush is used to raise the dust on the surface to be cleaned, such as a carpet, to increase the dust-picking efficiency of the floor nozzle, and for this purpose, it is desirable that the brush body be installed along its entire length. However, with rotating brushes that have a pulley part in the middle in the longitudinal direction, the brush body is not present not only by the width of the pulley part but also by the thickness of the packing. There is also a part without a brush, which has the disadvantage that the dust suction performance is correspondingly poor.

Purpose of the Invention The present invention eliminates these conventional drawbacks, and aims to improve dust absorption performance by minimizing the non-brush portion of the rotating brush, and also to ensure that dust does not enter the pulley part. This was prevented.

Structure of the Invention The present invention has a flexible packing that rotates with the pulley attached to the side of a pulley provided in a rotating brush, and a belt cover is provided on the exterior of the packing, and a belt cover is provided inside the floor nozzle. By displacing the packing into contact with the belt cover by the suction force of the belt cover, the pulley portion is ensured to be dust-tight.

Description of examples Examples thereof will be described below with reference to the accompanying drawings.

Figures 2 to 4 show an example of an upright vacuum cleaner, in which 11 is a floor nozzle with a built-in rotating brush 12, 13 is a fan motor 14, and a dust collector (not shown) is installed on the suction side. Mainly the vacuum cleaner installed inside. The floor nozzle 11 has a crotch-shaped rear end extending to both sides of the main body 13 of the vacuum cleaner, and is rotatably connected to the main body 13 of the vacuum cleaner via shafts 15 and 16. . Reference numeral 17 indicates a handle, and reference numeral 18 indicates a hose that guides dust-containing air flowing in from the floor nozzle 11 to the dust collecting section of the main body 13 of the vacuum cleaner in conjunction with the suction operation of the fan motor 14. Note that the dust-containing air that has reached the dust collection section is passed there, and only clean air passes through the fan motor 14 and is discharged from a predetermined exhaust port.

19 is a moving roller, and 20 is a rotating shaft of a fan motor 4 whose tip passes through one shaft 15 and enters the inside of the nozzle 1.

By the way, the above-mentioned rotating brush 12 is constructed by installing a brush body 21 in a spiral direction on the circumferential surface, and is rotatably attached to a shaft 23 supported by supports 22 at both ends. 24 is a rotating brush operating chamber, 25
is a bottom plate, and the brush body 2 of the rotating brush 12 is inserted through the suction port 26 formed corresponding to the rotating brush working chamber 24.
A part of 1 is made to protrude. 27 is a pulley portion formed midway in the longitudinal direction of the rotating brush 12; 28 is an intermediate transmission portion disposed between the rotating shaft 20 of the fan motor 4 and the pulley portion 27;
It has a first pulley 29 and a second pulley 30 in clutch engagement.

31 is a first belt stretched between the rotating shaft 20 and the first pulley 29; 32 is a second belt stretched between the second pulley 30 and the pulley portion 27 of the rotating brush 12;

That is, the rotational force of the fan motor 4 is transmitted from the rotating shaft 20 to the first belt 31 to the first pulley 29 to the clutch to the second pulley 30 to the second belt 32 to the pulley section 27, thereby causing the rotating brush 12 to rotate. Rotationally driven. Furthermore, when the clutch is released, the first pulley 29 idles, and the rotational force of the rotating brush 12 is stopped.

Now, 33 is a disc-shaped packing fixed to both sides of the pulley portion 27 of the rotating brush 12, and is made of a flexible material such as felt. A belt cover 34 is provided so as to circumscribe this packing 33.

In the above configuration, since the packing 33 rotates together with the rotating brush 12, even if it is made of a flexible material, the packing 33 continues to maintain its disc shape due to centrifugal force. Since the rotating brush working chamber 24 facing the rotating brush 12 is subjected to the suction force of the fan motor 4, the packing 33 receives a displacement force in the direction of the belt cover 34 due to the suction force. It makes sure to come into contact with the cover 34 to completely keep the dust tight between them.

In this way, since the packing 33 rotates simultaneously with the rotating brush 12 and comes into contact with the belt cover 34 by suction, the packing thickness can be made smaller than in the past, and there is no need to clamp it with ribs from both sides. It disappears. Therefore, the non-brush portion of the rotating brush can be shortened by the reduction in packing thickness and the absence of inner ribs.

In the above embodiment, the fan motor of the vacuum cleaner is used as the driving source for the rotating brush, but of course a motor for driving the rotating brush may be provided in the floor nozzle, and the intermediate transmission mechanism may be omitted depending on the case. It is also possible.

Effects of the Invention As is clear from the above embodiments, since the present invention circumscribes the belt case to the flexible packing that rotates together with the rotating brush, it not only becomes possible to use a thin packing, but also enables the use of flexible packing that rotates together with the rotating brush. There is no need to provide holding members on both sides, and therefore, the non-brush portion of the rotating brush can be reduced accordingly, thereby improving the dust absorption characteristics. Furthermore, in particular, in the present invention, since the packing is brought into close contact with the belt case by the action of the suction force, the dust-tight property of that part is significantly improved, and the adverse effects of dust entering the pulley part can be reliably prevented.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional rotary brush drive unit, Fig. 2 is a perspective view of a vacuum cleaner showing an embodiment of the present invention, Fig. 3 is a cross-sectional view of the floor nozzle unit, and Fig. 4 is a vertical sectional view of the same. It is a front view. 11...Floor nozzle, 12...Rotating brush, 13
... Vacuum cleaner main body, 14 ... Drive source (fan motor), 27 ... Pulley part, 32 ... Belt, 3
3...Packing, 34...Belt cover.

Claims (1)

[Claims] 1 A vacuum cleaner body with a fan motor built in, a floor nozzle that is connected to the suction side of the vacuum cleaner body and has a built-in rotating brush, and a pulley part formed midway in the longitudinal direction of the rotating brush, and a drive source. a belt for transmitting the rotational force of the rotary brush to the rotating brush; a flexible packing provided on the side of the pulley portion and rotating together with the pulley portion;
A vacuum cleaner including a belt cover body circumscribing the packing.