JPH0445172B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a turbine nozzle that is used by being connected to a hose/extension pipe of a vacuum cleaner.

Conventional technology Conventionally, in this type of turbine nozzle, a built-in turbine is rotated by the suction air flow of a vacuum cleaner, and the generated rotational torque drives an agitator to rotate, thereby scraping dust at the base of fibers such as carpet. It was designed to increase dust suction performance and clean carpets by raising the air temperature and inhaling it.

However, as the suction performance of vacuum cleaners has improved in recent years, the amount of suction air required for the first use or after the dust has been disposed of has increased. In this case, the turbine is rotated at an extremely high speed, and a problem arises in that the turbine blades cut the high-speed suction airflow intermittently and at high speed, resulting in an increase in noise due to high-frequency sound generated.

The fifth invention is an invention that was made to solve this problem.
This will be explained based on FIGS. A main passage 5 and a sub passage 6 are formed as passages that communicate the turbine chamber 2 containing the turbine 1 and the brush chamber 4 containing the rotating brush 3, and are partitioned by a partition wall 9 formed by an upper body 7 and a lower body 8. has been done. The suction airflow passing through the main passage 5 does not directly collide with the turbine 1, and the auxiliary passage 6
The suction airflow passing through directly impinges on the turbine 1. The shielding plate 10 opens and closes the main passage 5, and when the main passage is opened, most of the suction airflow from the turbine nozzle 11 passes through the main passage 5 and is sucked into the vacuum cleaner body, and some of the suction air collides with the turbine 1. Since the flow velocity of the airflow is low, the turbine 1 does not rotate, and the wooden floor or tatami surface is cleaned. On the other hand, when the shielding plate 10 is operated to close the main passage 5, the suction airflow flows into the turbine chamber 2 from the auxiliary passage 6, collides with the turbine 1 at high speed and rotates it, and the rotating brush 3 is driven to rotate. Then, it becomes a state of constant cleaning. 12 is a rib formed integrally with the lower body 8 immediately before the sub passage 6;
It has a substantially L-shaped cross section and covers the sub passage 6 from the center side of the turbine nozzle 11. This rib 12 restricts the suction airflow flowing into the sub-passage 6 from the center side of the turbine nozzle 11, reduces the flow velocity of the suction airflow, and suppresses the generation of the above-mentioned high-frequency sound. This prevents leakage from the turbine chamber 2 to the brush chamber 4 and further to the outside of the turbine nozzle 11.

Problems to be Solved by the Invention However, in the above configuration, since the rib 12 is integrally formed on the lower body 8, when cleaning a wooden floor or tatami surface, the suction airflow passing through the sub passage 6 is turned into a turbulent flow and is This increased suction noise when cleaning floors and tatami surfaces.

Furthermore, when cleaning wooden floors or tatami surfaces, the fibrous dust sucked into the turbine nozzle 11 is divided into the main passage 5 and the sub passage 6 and sucked into the turbine chamber 2. caught on rib 12,
It had the disadvantage that it was not smoothly sucked into the vacuum cleaner body.

The present invention aims to solve these problems and provide a turbine nozzle that is easy to use.

Means for Solving the Problems In order to solve the above problems, the present invention provides an agitator chamber that houses an agitator therein and has a suction port on the lower surface, a turbine chamber that houses a turbine that rotationally drives the agitator, and these turbine chambers. an intake passage that communicates with the agitator chamber; a shielding plate that slidably opens and closes the front of the turbine in the intake passage to control rotation and stop of the turbine; and upper and lower bodies forming a turbine chamber; The shielding plate is integrally formed with a rib having an L-shaped cross section that protrudes toward the agitator chamber.When the turbine is rotating, this rib overlaps the intake passage in front of the turbine, and when the turbine is stopped, it overlaps the end of the intake passage on the opposite side of the turbine. This is provided on the shielding plate so that the

Effect The effect of the above configuration is that when cleaning the carpet, the rib formed on the shielding plate covers a part of the center side of the intake passage in front of the turbine to reduce high frequency noise generated by the turbine. On the other hand, when cleaning wooden floors and tatami surfaces, as the shield plate slides, the ribs are positioned at the end of the intake passage to prevent dust from getting caught and to eliminate turbulence caused by the ribs. This makes it possible to reduce intake airflow noise.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In Figures 1 to 4, a turbine nozzle 2 is connected to the vacuum cleaner body via a hose/extension pipe.
1 has an agitator chamber 23 containing an agitator 22 at the front, and a turbine chamber 28 containing a turbine 24 at the rear and comprising an upper body 25, a lower body 26, and a connecting pipe 27. The connecting tube 27 is rotatably held within a certain range by the upper body 25 and the lower body 26, and a connecting tube 29 connected to the hose or extension tube is rotatably connected via a connecting ring 30. The front body 31 is removably connected to the upper body 25 and the lower body 26 by means of a pair of buckles, and covers the agitator chamber 23 from above. The bearing pipe 32 rotatably and slidably holds a turbine shaft 33 holding a turbine 24, and the belt 34 is attached to an end of the turbine shaft 33 opposite to the turbine 24 and a pulley 35 attached to an end of the agitator 22. The rotational torque generated by the rotation of the turbine 24 is transmitted to the agitator 22 .

Reference numerals 36 and 37 denote a partition wall A and a partition wall B that partition the agitator chamber 23 and the rear thereof, which are formed by abutting the walls formed on the upper body 25 and the lower body 26, and form a passage 38 that communicates the turbine chamber 28 and the agitator chamber 23. Located on both sides. The switching lever 39 has an operating knob 40 that protrudes upward from the upper body 25.
and a shielding plate 41 that closes a part of the passage 38, and a ventilation hole 42 is provided approximately in the center of the shielding plate 41.
is formed. When the knob 40 is located on the turbine chamber 28 side as shown in FIG.
A turbine port 44 is formed with the intake port wall 43 formed in the above. When the main body of the vacuum cleaner is operated in this state, the intake air passing through the turbine port 44 and flowing into the turbine chamber 28 collides with the turbine 24 at high speed, causing the turbine 24 to rotate, and is transmitted by the belt 34 to the agitator. 22 rotates and enters the state of cleaning the carpet.

Conversely, when the knob 40 is located on the end side of the turbine nozzle 21 as shown in FIG.
1 is located behind the intake port wall 43 and the turbine port 4
4 is closed, and the ventilation hole 42 opens the knob 40 side of the passage 38. At this time, since the suction airflow does not directly impinge on the turbine 24, the turbine 24 and the agitator 22 do not rotate, and the wooden floor or tatami surface is cleaned. Further, the shielding plate 41 has an upper end portion and a lower end portion formed in a groove A4 formed in the upper body 25 and the lower body 26, respectively.
8. It is fitted into the groove B49 and is slidably held. Reference numeral 50 denotes a rib that is integrally provided with the shielding plate 41 at the end of the ventilation hole 42 on the knob 40 side, protrudes toward the agitator chamber 23 side, and has a substantially L-shaped horizontal cross section. In the carpet cleaning state, the rib 50 covers the knob 40 side end of the turbine port 44, and in the wooden floor/tatami surface cleaning state, the rib 50 contacts the partition wall A36 and covers the ventilation hole 42 that opens the passage 38 on the right front side of the turbine 24. Covers a part of the side end of the knob 40.

Next, the operation and effect of the above configuration will be explained.

When cleaning the toilet, the knob 40 is positioned on the turbine chamber 22 side, and the suction air flowing from the agitator chamber 23 into the turbine chamber 28 is directed through the ventilation hole 42.
The air flows through the turbine port 44 formed by the intake port wall 43 and at high speed. The incoming suction airflow impinges on the turbine 24 at high speed, causing it to rotate. This rotation is transmitted to the agitator 22 by the belt 34, and the agitator 22 rotates to scrape up the dust at the base of the fibers, such as carpet, and suction it for efficient cleaning. In this state, the ribs 50 protrude into the agitator chamber 23 and thus act as a shield for the suction airflow flowing into the turbine port 44 from the center side of the turbine nozzle 21, thereby restricting the suction airflow passing through the turbine port 44. In addition to reducing the flow velocity of the turbine and suppressing the generation of high-frequency sound caused by the turbine blades cutting the intake airflow intermittently and at high speed,
Since the turbine 44 covers the center side of the turbine nozzle 21, the high frequency sound generated is transmitted to the turbine port 4.
4 from the turbine chamber 28 to the agitator chamber 2
Third, furthermore, leakage to the outside of the turbine nozzle 21 is prevented.

On the other hand, when cleaning a wooden floor or a tatami surface, the switching lever 39 is slid so that the knob 40 is located on the end side of the turbine nozzle 21. In this state, as the switching lever 39 moves, the rib 50 changes to the partition wall A3.
At the same time, the ventilation hole 42 opens the passage 38 at the right front position of the turbine 24, and the shielding plate 41 closes the turbine port 44, so that the intake airflow does not directly impinge on the turbine 24 and the turbine 24 does not rotate.
Further, since the rib 50 is located at the end of the dust intake passage, even if fibrous dust passes through it, it will not get caught. Furthermore, the effect of disturbing the suction airflow passing through the ventilation holes 42 is greatly reduced, and therefore the suction airflow noise can be reduced.

Effects of the Invention As explained above, the agitator chamber houses an agitator inside and has a suction port on the lower surface;
A turbine chamber that houses a turbine that rotationally drives an agitator, an intake passage that communicates the turbine chamber with the agitator chamber, and a shielding plate that slidably opens and closes the front of the turbine in the intake passage to control rotation and stop of the turbine. , comprising upper and lower bodies forming a turbine chamber, and the shielding plate is integrally formed with a rib having an L-shaped cross section that protrudes toward the agitator chamber, and when the turbine is rotating, this rib is connected to the intake passage in front of the turbine. By providing the shield plate so that it overlaps and is located at the opposite end of the intake passage when the turbine is stopped, it reduces the high-frequency sound generated by the turbine when cleaning the carpet, and reduces the high frequency sound generated by the turbine when cleaning the carpet.
When cleaning the tatami surface, it is possible to prevent dust from getting caught on the ribs, and also to eliminate the generation of turbulence caused by the ribs, thereby reducing the noise of the suction air flow.

[Brief explanation of drawings]

Figure 1 is an exploded perspective view of a turbine nozzle according to an embodiment of the present invention with the upper body and front body removed, Figure 2 is a perspective view of the turbine nozzle with the front body removed, and Figure 3 is the same state of carpet cleaning. Figure 4 is a central cross-sectional view of the turbine nozzle, Figure 5 is an exploded perspective view of the front body of a conventional turbine nozzle with the rotating brush removed, and Figure 6 is the same turbine. FIG. 3 is a horizontal cross-sectional view of the nozzle. 21... Turbine nozzle, 22... Agitator, 23... Agitator chamber, 24... Turbine, 25... Upper body, 26... Lower body, 28...
Turbine chamber, 38... passage, 41... shielding plate, 4
2...ventilation hole, 50...rib.

Claims (1)

[Claims] 1. An agitator chamber that stores an agitator inside and has a suction port on the lower surface, a turbine chamber that houses a turbine that rotationally drives the agitator, an intake passage that communicates these turbine chambers and the agitator chamber, and a front part of the intake passage that connects the turbine. A shield plate that can be slidably opened and closed to control rotation and stop of the turbine;
The shielding plate has a cross section L projecting toward the agitator chamber.
A vacuum cleaner is installed on the shielding plate, which is integrally formed with a letter-shaped rib, which overlaps the intake passage in front of the turbine when the turbine is rotating, and is located at the opposite end of the intake passage when the turbine is stopped. turbine nozzle.