JPH0445173B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a floor nozzle for a vacuum cleaner equipped with an agitator.

Conventional technology Conventionally, the agitator for this type of floor nozzle was
As described in Publication No. 62-161334, it has a sliding contact piece that is made of an elastic material and has protrusions formed on both the front and back sides of the tip, and this sliding contact piece has the protrusions in the longitudinal direction. Some were formed to have a substantially triangular cross section, and others were formed to have a thin plate shape in cross section, as in the sliding contact piece described in Japanese Patent Publication No. 63-35246.

Problems to be Solved by the Invention By the way, when the sliding contact piece disclosed in JP-A-62-161334 is used, the rotational resistance received from the cleaning surface is reduced due to the low flexibility due to the thick wall at the base of the sliding contact piece. It becomes large and the agitator has poor rotational performance. Therefore, a device using a sliding contact piece described in Japanese Patent Publication No. 63-35246 came to be used, but due to the reverse effect of the improved rotatability of the agitator, the sliding contact piece continuously covered the cleaning surface. A problem occurred where the tapping sound became high pitched. For this reason, in an attempt to reduce noise by reducing the sound of the sliding contact piece hitting the surface to be cleaned, the wall thickness of the sliding contact piece was made even thinner. With this agitator, when the end of the sliding contact piece on the side opposite to the belt tension contacts the surface to be cleaned, the part on the belt side has already touched the surface to be cleaned and rotated upward, resulting in a strong contact with the surface. However, it was discovered that it could not be used immediately due to the phenomenon of breakage.

It is an object of the present invention to solve this problem and provide an agitator with excellent usability and durability.

Means for Solving the Problems The technical means of the present invention for achieving the above object includes an agitator that is made of a holder and a flexible elastic material, has a protrusion on the surface for scraping up dust, and has a holder. The sliding contact piece is spirally attached along the longitudinal direction, and the sliding contact piece has a thick part at the end and a thin part at the other end.

Effect: With the above means, the thickness of the end of the sliding contact piece is made almost the same as the thickness of the conventional sliding contact piece to ensure the durability of the end of the sliding contact piece when the agitator rotates, while the thickness of the other parts is reduced. By making it thinner, the sound of the sliding contact piece hitting the surface to be cleaned is reduced, and by making the sliding contact piece generally thinner, it becomes more flexible, which reduces the resistance to rotation received from the cleaning surface, reducing the rotational driving force. The noise generated due to the generation of this driving force can be reduced, and therefore the noise generated when the agitator of the vacuum cleaner rotates can be reduced, and the usability can be improved.

Example A first example will be described below with reference to the drawings.

In Figures 1 to 7, 1 is a floor nozzle body connected to a vacuum cleaner via a hose and an extension pipe, and a suction port chamber 3 with an agitator 2 built in at the front.
Each has a turbine chamber 8 containing a turbine 4 at the rear thereof, and is composed of an upper body 5, a lower body 6, and a connecting pipe 7. The connecting tube 7 is held between the upper body 5 and the lower body 6 so as to be able to move up and down. A connecting pipe 9 is rotatably connected to the connecting pipe 7 via a connecting ring 10, and is connected to the hose or extension pipe. Reference numeral 11 denotes a front body, which is removably connected to the upper body 5 and the lower body 6 by means of a pair of buckles 12, and covers the suction port chamber 3 from above. 13 is a bearing pipe that rotatably holds the turbine shaft 14 holding the turbine 4; 15 is a turbine shaft of a pulley 16 attached to the end of the turbine shaft 14 opposite to the turbine 4 and to both ends of the agitator 2; This is a belt stretched around the pulley 16 on the 14 side. Reference numeral 17 designates a switching lever that integrally includes an operating knob 18 that protrudes upward from the upper body 5 and a shielding plate 20 that opens and closes a main passage 19 that communicates with the suction port chamber 3 of the turbine chamber 8. 8 side, the shielding plate 20 closes the main passage 19, and conversely, when the knob 18 is positioned on the end side of the floor nozzle body 1, the switching lever 1 closes.
7, the shielding plate 20 slides toward the end and opens the main passage 19. Reference numeral 21 denotes an auxiliary passage formed in front of the turbine 4, which constantly communicates the turbine chamber 8 with the suction port chamber 3, and which connects the upper body 5 and the lower body 6.
It is more formed.

The agitator 2 is a holder 2 made of low foam resin.
2 and inserted into this holder 22 facing each other,
It is formed from two fitted sliding contact pieces 23, two toothed pulleys 16 for belt tensioning fixed to both ends of the holder 22, and a holder shaft press-fitted to both ends of the holder 22. , is rotatably fixed to the lower body 6 by a pair of bearings 24 fitted to the holder shaft. Also, agitator 2
As shown in Figure 1, it is shaped like a spiral twisted approximately 180 degrees. The sliding contact piece 23 is made of an elastic material such as rubber or soft vinyl chloride, and consists of a fixed part 23a that is fitted into the holder 22, and a sliding contact part 23b formed in a thin plate shape on the outer circumferential side of the agitator. The surface of the sliding contact portion 23b is provided with a protrusion 2 for scraping up dust, which is made up of a large number of approximately conical minute protrusions.
3c is formed, protrudes downward from the suction opening 25 formed below the suction port chamber 3 of the lower body 6, and comes into sliding contact with the cleaning surface. Also, from both ends of the sliding contact portion 23b, approximately
The wall thickness of the 15mm part is z = approx. 0.8mm, and the inside part is approx.
The wall thickness y of the 10 mm portion gradually changes to about 0.8 to 0.5 mm, and the inner wall thickness x is about 0.5 mm.

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

When cleaning tatami mats or hard floor surfaces, the switching lever 17 is moved toward the end of the floor nozzle body 1. At this time, the shielding plate 20 opens the main passage 19 and the flow velocity of the suction air passing through the sub passage 21 becomes low, so that the rotation of the turbine 4 is stopped, and the agitator 2 is used while being stopped.

On the other hand, when cleaning the toilet, the knob 18 is positioned on the turbine chamber 8 side and the shielding plate 20 is used to close the main passage 19.
, and the suction air is passed through the suction opening 25 → sub passage 21 →
The water flows through the turbine chamber 8 → connecting pipe 9 → hose, extension pipe → vacuum cleaner body. The air flow that has entered the turbine chamber 8 is throttled by the auxiliary passage 21 and collides with the turbine 4 at high speed, causing it to rotate in the direction of the arrow shown in FIG. This rotation is transmitted by the belt 15 and the agitator 2 rotates, removing dust at the base of the carpet fibers and fibrous dust such as lint and hair attached to the surface of the protrusion 2 formed on the sliding contact portion 23b.
3c is raked up, making it possible to clean the floor efficiently and easily.

By the way, since the agitator 2 is twisted in the direction shown in FIG.
Since the part on the belt 15 side has already touched the cleaning surface and rotated upward, it makes a strong contact with the ground, but the wall thickness z of this part is 0.8 mm, which is different from the thickness of the conventional sliding contact piece. Since they are almost the same, they will not break or break during normal use, ensuring the same durability as before.

Furthermore, since the wall thickness x within the approximately 25 mm section from both ends of the sliding contact portion 23b is formed to be as thin as x = approximately 0.5 mm, the sound of the entire sliding contact piece 23 hitting the cleaning surface is reduced, and in addition, The agitator 2 receives more damage from the cleaning surface due to increased flexibility due to the overall thinning of the sliding contact piece 23.
The resistance to the rotation of the vacuum cleaner is reduced, the rotational driving force is reduced, and the noise generated due to the generation of this driving force can be reduced.Therefore, the noise generated when the agitator of the vacuum cleaner rotates, in other words, the noise when cleaning the carpet, can be reduced. It is possible to reduce the

Next, a second embodiment will be described. In FIG. 8, the sliding contact piece 50 is composed of a fixed part 50a fitted to the holder 22 and a protrusion 50c for scraping up dust formed on both sides of the tip of the sliding contact part 50b. has been done. The sliding contact portion 50b is formed of a thick wall portion 51 at both ends and a thin wall portion 52 inside the thick wall portion 51. The operations and effects in this configuration are similar to those in the first embodiment.

Although the above explanation uses a turbine nozzle as an example, the agitator may be rotated by an electric motor, etc., and is not limited to the suction device of a vacuum cleaner connected to a hose or extension pipe; A similar effect can be obtained with an agitator placed in the suction section of a vacuum cleaner.

Effects of the Invention As explained above, the agitator, which is rotated while facing the opening provided at the bottom of the suction port, is made of a flexible and elastic material, has a protrusion for scraping up dust, and extends in the longitudinal direction of the agitator. The sliding contact piece is provided with a sliding contact piece that is attached in a spiral shape along the sliding contact piece, and a holder that holds the sliding contact piece, and the sliding contact piece is configured to have a thick wall portion at both ends and a thin wall portion at the other end. This ensures the durability of the end of the sliding contact piece when the agitator rotates, while reducing the sound of the sliding contact piece hitting the surface to be cleaned. The resistance to the rotation received is reduced, the rotational driving force is reduced, and the noise generated due to the generation of this driving force can be reduced. Therefore, the noise generated when the agitator of the vacuum cleaner rotates can be reduced, and the usability can be improved. It is something.

[Brief explanation of the drawing]

FIG. 1 is a horizontal sectional view with the upper body and front body removed of a floor nozzle according to the first embodiment of the present invention, FIG. 2 is a front view of the sliding contact piece, and FIG. 3 is a central vertical sectional view of the nozzle. Figure 4 is a perspective view of the turbine nozzle, Figure 5 is a sectional view taken along line A-A in Figure 2,
Figure 6 is also a BB sectional view, and Figure 7 is also C-C.
-C sectional view and FIG. 8 are front views of the sliding contact piece showing the second embodiment. 1... Floor nozzle body, 2... Agitator, 2
2...Holder, 23...Sliding contact piece, 23c...Protrusion.

Claims (1)

[Claims] 1 An agitator that is rotationally driven by a drive source is disposed inside the floor nozzle body, and this agitator is
It consists of a holder and a sliding contact piece that is made of an elastic material, has a protrusion on its surface for scraping up dust, and is attached in a spiral along the longitudinal direction of the holder, and the sliding contact piece has an end portion. A floor nozzle for a vacuum cleaner that has a thick wall section and other thin wall sections.