JPH0118730B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air turbine suction port for a vacuum cleaner, and in particular, aims to reduce noise generated due to a sudden change in load when the air turbine suction port body is separated from a surface to be cleaned. Regarding ivy air turbine inlet.

With conventional air turbine suction ports, when the suction body is moved away from the surface to be cleaned, the load on the rotary brush is removed, which causes the air turbine to rotate at an abnormally high speed, which not only generates loud noise but also causes the rotary brush to lose its load. This had the disadvantage that the lifespan of bearings and other parts of the rotating mechanism was significantly shortened. In order to cope with this problem, a method has been adopted in the past in which a bypass port is provided in a portion of the mouthpiece body that comes into contact with the surface to be cleaned in order to reduce noise. However, this method has disadvantages in that the structure is complicated and that air is also drawn from the side channel opening during cleaning, resulting in a decrease in suction performance.

An object of the present invention is to provide a vacuum cleaner with a simple structure that eliminates the above-mentioned disadvantages of the prior art and can suppress noise when the mouthpiece body is separated from the surface to be cleaned without reducing suction performance. The purpose of the present invention is to provide an air turbine inlet.

A feature of the present invention is that when the rotary brush of the air turbine suction body leaves the surface to be cleaned, the rotating casing rotates, and the sliding wall of the rotating casing causes a nozzle provided to blow the suction airflow onto the runner of the air turbine. The structure is such that the nozzle opening area is changed small by blocking a part of the opening of the nozzle, and as a result, when the mouthpiece body is on the surface to be cleaned, the load on the rotary brush is reduced due to friction between the rotary brush and the surface to be cleaned. Once the rotation of the air turbine runner stabilizes, when the suction body moves away from the surface to be cleaned, the nozzle opening area automatically decreases and the air volume decreases, preventing the air turbine runner from rotating at abnormally high speeds. The purpose is to prevent unpleasant noise caused by high-speed rotation and shortening of the life of rotating mechanical parts.

An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a perspective view of the air turbine inlet, Fig. 2 is a bottom view thereof, Fig. 3 is a plan view with the upper case 1 removed from Fig. 1, and Fig. 4 is a sectional view taken along line A-A in Fig. 3. , FIG. 5 is a sectional view taken along the line B-B in FIG. 2, FIG. 6 is a longitudinal sectional view of FIG. 1, and FIG. be.
The mouthpiece body has an upper case 1 and a lower case 2,
A rotary brush 11, an air turbine runner 24, a floor brush 9, a switching lever 3, etc. are provided inside. At the rear of the mouthpiece body, there is a bending joint 5 connected to an extension pipe (not shown) of a vacuum cleaner, and there is a rotating casing 4 which is rotatable and rotates integrally with the vertical movement of this bending joint 5. The upper case 1 and the lower case 2 are screwed together at screw bosses 27 (4 locations) (FIG. 3). 3 is a switching lever that can be switched so that the rotary brush 11 hits the surface to be cleaned, or the floor brush 9 hits the surface to be cleaned, depending on when cleaning the carpet or the floor/tatami. do the work. Reference numeral 6 denotes a bumper, which is wrapped around the outer periphery of the mouthpiece body, and is used to provide impact resistance and to prevent furniture from being damaged during cleaning. Reference numerals 7 and 8 denote wheels (small) and wheels (large) that are disposed on the lower case 2 so that the mouthpiece body moves smoothly on the surface to be cleaned.

Floating bearings 14 are provided at both ends of the rotary brush 11.
14 (Fig. 3), and bearing support rib (front) 15
f and a bearing support rib (rear) 15b, and a pulley (large) 16 is attached to the left end.
is provided. Further, the rotary brush 11 is provided with a beater 45 and a rotary brush brush 12. 24 is an air turbine runner;
A shaft 23 passes through the inside, is fixed by a C ring 20, and is supported by a bearing holder 18 and a bearing holder support rib 39 via a bearing 19. A small pulley 17 is provided at one end of the shaft 23, and rotation of the runner 24 is transmitted to the rotary brush 11 via a transmission belt 40. The floor brush 9 is stored in a floor brush storage section 46 (FIGS. 2, 6, and 7), and the floor brush flanges 43, 43 (fourth
) is supported by the lower case 2 via a floor brush spring 41 so as to be freely retractable. 32 is a connecting arm (FIGS. 3 and 4) that passes through the floor brush storage section 46. In addition, the floor brush 9 has a recessed platform at the top.
There are (1) 38a and a retractable stand (2) 38b, and a floor brush 13 is flocked at the bottom.

The switching lever 3 has a shutter 33 (Fig. 4,
5), a connecting arm support rib 44 for hooking and supporting the connecting arm 32, and a push rib 42 for making the floor brush 9 appear and disappear.
It is supported on the lever support rib (front) 30f and the lever support rib (rear) 30b so as to be able to move left and right. When the switching lever 3 moves to the left in FIG. 3, the articulated spring 28 supported by the spring support rib 29
It is held in position after being moved. Shutter 33
The nozzles that can be switched include a nozzle (small) 36 that communicates with the runner 24 of the air turbine and a nozzle (large) 37 that does not communicate with the runner 24.
It is located at 5. The opening area of the nozzle (large) 37 is larger than the opening area of the nozzle (small) 36.
Further, a shutter receiving groove 34 is provided in the lower case 2 so that the shutter 33 can smoothly move left and right. Rotating casing 4 has rotating rib (large) 25
It is rotatably supported by a rotating rib (small) 26 (Fig. 4).

When cleaning the carpet, use the switching lever 3.
is in the position shown in FIG. 4, and the floor brush 9 is retracted inside the mouthpiece body. And the shutter 33 is
The nozzle (large) 37 is closed and the nozzle (small) 36 is opened. The suction force of the vacuum cleaner body rotates the runner 24 of the air turbine, and this rotation is transmitted via the transmission belt 40 to the rotary brush 1.
1 rotates. The dust contained in the carpet is scraped up by the rotation of the rotary brush 11, and is swept up by the suction force of the vacuum cleaner body into the suction port 31.
(Fig. 6), enters the rotary brush chamber 21, passes through the nozzle (small) 36, enters the turbine chamber 22,
It passes through the inside of the bending joint 5 and is sucked into the cleaner body.

When cleaning the floor/tatami surface, the switching lever 3 is moved to the right from the position shown in FIG. 4. Due to this movement, the lower surface of the push rib 42 and the upper surface of the protruding base (1) 38a engage with each other, and the lower surface of the right end of the connecting arm 32 and the retractable base
(2) The floor brush 13 is engaged with the top surface of 38b.
However, it protrudes from the lower surface of the lower case 2 by the height of the retractable table and comes into contact with the surface to be cleaned, thereby maintaining the air volume and improving the suction performance. At this time, the shutter 33 closes the nozzle (small) 36, and the dust enters the rotary brush chamber 21 from the suction port 31 due to the suction force of the vacuum cleaner body, enters the turbine chamber 22 through the nozzle (large) 37, and enters the runner 24. It passes through the inside of the bending joint 5 and is sucked into the vacuum cleaner body without passing through the inside. Since almost no suction airflow passes through the runner 24, the runner 24 does not rotate, and therefore the rotary brush 11 does not rotate.

In this way, the air turbine runner 24 does not rotate when cleaning floors or tatami mats, so no noise is generated. Furthermore, when cleaning the carpet, a load is applied due to the friction between the rotary brush 11 and the surface to be cleaned 48, so the rotation of the rotary brush 11 and the rotation of the runner 24 are reduced, and at this time, the noise is still within the allowable range. It will never be bigger than it can be.
At this point, the suction mouth body leaves the surface to be cleaned 48 (7th
), due to the rotation of the rotating casing 4, the sliding wall 47 on the lower case 2 side of the rotating casing 4 closes part of the opening area of the nozzle (small) 36 and nozzle (large) 37, and as a result, the nozzle opening area is made smaller, thereby reducing the air volume and the rotational speed of the runner 24. In this way, even when the runner 24 is separated from the surface to be cleaned of the suction body, the runner 24 does not rotate at an abnormally high speed, noise generation is suppressed, and the life of the parts of the rotating mechanism is shortened. Not at all.

As explained above, according to the present invention, when the suction mouth body is on the surface to be cleaned, the sliding wall of the rotating casing does not block the nozzle, so the original performance of the suction mouth is not deteriorated, and the suction body The problem with the conventional structure is that when the runner leaves the surface to be cleaned, the runner rotates at an abnormally high speed as the air volume increases, producing loud noise and shortening the life of parts of the rotating mechanism. This can be eliminated with a simple structure that reduces the air volume by reducing the nozzle opening area with the sliding wall of the casing.Furthermore, the vibration caused by abnormal rotation of the runner is transmitted from the bending joint to the handle via the extension pipe. At the same time, the disadvantage of the conventional structure that the conventional structure is such that it becomes impossible to perform a comfortable cleaning when the cleaning is carried out can be solved, and the comfortable cleaning can be continued.

[Brief explanation of drawings]

Figures 1 to 7 are explanatory diagrams of embodiments of the present invention; Figure 1 is a perspective view of the air turbine inlet, Figure 2 is a bottom view thereof, Figure 3 is a plan view of Figure 1 with the upper case removed; Figure 4 is a cross-sectional view taken along line A-A in Figure 3, Figure 5 is a cross-sectional view taken along line B-B in Figure 2, Figure 6 is a longitudinal cross-sectional view of Figure 1, and Figure 7 is a cross-sectional view taken along line B-B in Figure 2. This is a diagram when the suction mouth body is separated from the surface to be cleaned. 1... Upper case, 2... Lower case, 3... Switching lever, 4... Rotating casing, 9... Floor brush, 11... Rotary brush, 12... Rotary brush brush, 13... Floor brush brush, 24 ...Runner, 31...Suction port, 33...Shutter, 36
... Nozzle (small), 37 ... Nozzle (large), 47...
...Sliding wall, 48...Surface to be cleaned.

Claims (1)

[Claims] 1. A runner of an air turbine rotated by the suction airflow of a vacuum cleaner, a rotary brush connected to the runner via a rotation transmission means and rotated by the rotation of the runner, and a nozzle for blowing the suction airflow onto the runner. , in an air turbine suction port having a rotatable rotating casing that covers the nozzle and the runner, and an upper case and a case housing them, when the air turbine suction main body leaves the surface to be cleaned, the rotating casing rotates. An air turbine suction port for a vacuum cleaner, characterized in that a sliding wall of the rotating casing closes a part of the opening of the nozzle so that the nozzle opening area changes small.