JPS6149967B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floor suction port for a vacuum cleaner having a plurality of dust suction ports facing a surface to be cleaned.

Some floor suction ports of this type are equipped with a rotating brush that is rotated by a turbine, but the rotating brush is used exclusively for scraping out dust from carpets, and for cleaning the floor between tatami mats and boards. It is well known that sometimes rotating a rotating brush does not significantly change the cleaning effect, and it is better not to rotate the rotating brush in order to reduce noise. Such an operation is performed by switching the suction passage using a switching valve. Since such a floor suction port always communicates with only one of the suction passages, there is a possibility that fine dust, etc. may enter the suction passage on the side where communication is cut off during cleaning and contaminate the passage.
This has the disadvantage that the switching valve does not operate smoothly.

The present invention provides a new floor suction port which eliminates the above-mentioned drawbacks of the conventional art, and will be described below based on the illustrated embodiments.

The floor suction port 1 of the present invention comprises an upper case 2, a lower case 3, and an upper cover 4 made of synthetic resin to form an outer shell. A main dust suction port 5 and sub dust suction ports 6 and 7 are formed on both sides of the main dust suction port 5, and a turbine chamber 8 and a suction port that communicates the turbine chamber, the sub dust suction ports 6 and 7, and the main dust suction port 5 independently. Passage 9,1
0 and 16 are partitioned. A connecting pipe 11 connected to the vacuum cleaner body is connected to the turbine chamber 8.
This connecting pipe is integrally formed with shaft parts 12 and 13 for rotatably pivoting in a direction perpendicular to the floor surface, and bearing parts 14 formed in the upper case 2 and the lower case 3 are formed integrally with each other. , 15, as shown in FIG. 11, α angle is above the horizontal direction and β is below
It is supported so that it can rotate freely within an angular range. A turbine 18 is rotatably supported within the turbine chamber 8, and its rotating shaft 19 is led out of the turbine chamber 8 and is connected by a belt 21 to a rotary brush 20 that is rotatably supported facing the main dust inlet 5.

As described above, the auxiliary dust suction ports 6 and 7 are communicated with the turbine chamber 8 through independent suction passages 9 and 10, respectively, and the openings of the suction passages 9 and 10 in the turbine chamber 8 are provided to the turbine 18. It is installed on the side of the room where it is not affected by airflow. A valve body 22 rotatably supported by the upper case 2, lower case 3, and upper cover 4 is provided in the suction passages 9, 10. This valve body 22 includes a lever 23 and an elastic piece 2.
4 is provided, and the lever 23 is connected to the connecting pipe 1.
It is arranged perpendicularly to levers 25 and 26 provided on the shaft parts 12 and 13 of 1, and is lifted upward by the levers 25 and 26 when the connecting pipe 11 is rotated downward, so that the valve body 22 It acts to open up. In addition, the tip of the elastic piece 24 is in contact with the inner surface of the upper lid 4, and receives a reaction force from there, which causes the suction passages 9, 10 to
The valve body 22 is pressed down so as to shut off the flow. This valve body is provided with an opening 17 that allows small communication between the front and rear parts in the closed state.

On the other hand, the main dust suction port 5 has a suction passage 16 and a nozzle 27.
It communicates with the turbine chamber 8 via. The nozzle 27 is held between the lower case 3 and the upper lid 4, and is provided with a folding nozzle section 28 and a carpet nozzle section 29. A partition wall 30 is formed integrally with the nozzle 27 and positions the rotating shaft 19 of the turbine 18 outside the suction passage 10. 31 is nozzle 2
It is a switching valve that slides opposite to 7, and has a folding valve part 32, a carpet valve part 33, and an operation knob 34.
It is slidably attached between the lower case 3 and the upper cover 4 so that the operating knob 34 projects outside. Reference numeral 35 denotes a lock portion that detachably attaches the upper cover 4 to the upper case 2.

Next, the operation of the embodiment configured as above will be explained. First, when the operation knob 34 of the switching valve 31 is set to "Fold", when the floor suction port 1 is placed on the floor, that is, during cleaning, the carpet nozzle part 29 of the nozzle 27 is set to the switching valve. 31 is blocked by the valve part 33, and conversely, the valve part 32 is removed from the folding nozzle part 28, and the main dust suction port 5
Air containing dust sucked in from the folding nozzle portion 28 flows into the turbine chamber 8 and is sucked into the cleaner body via the connecting pipe 11.

During this cleaning, if the suction force of the vacuum cleaner body is below an appropriate value, the valve body 22 is in the closed state, but the suction passages 9 and 10 are in small communication with each other through the opening 17 of the valve body 22. A small amount of air always flows towards the turbine chamber 8. On the other hand, if the suction force of the vacuum cleaner body becomes large or the main dust suction port 5 or the folding nozzle part 28 is blocked, the degree of vacuum in the turbine chamber 8 increases and the valve body 22 resists the elastic piece 24. The suction air volume from the sub-dust suction ports 6 and 7 increases to control the pressure inside the turbine chamber 8.

When the floor suction port 1 is lifted from the floor in the above set state, the weight of the floor suction port 1 causes the connecting pipe 11 to rotate downward by an angle β as shown in FIG. The levers 25 and 26 lift the lever 23 of the valve body 22 upward. Therefore, the valve body 22 is forcibly opened against the elastic piece 24, and the air passage from the sub-dust suction ports 6 and 7 to the turbine chamber 8 via the suction passages 9 and 10, and from the main dust suction port 5 to the suction passage. 16. Three air passages are formed that reach the turbine chamber 8 via the folding nozzle part 28, and the amount of suction air is distributed to each air passage, so that the noise caused by the suction air flow is suppressed to a low level.

Next, a case will be described in which the operating knob 34 of the switching valve 31 is set to "adjust". In this state, the folding nozzle section 28 is blocked by the valve section 32 of the switching valve 31, and conversely, the folding nozzle section 28 is closed by the valve section 32 of the switching valve 31.
The valve part 33 is removed from the main dust suction port 5, and the air sucked in from the main dust suction port 5 passes through the carpet nozzle part 29 to create a high-speed airflow. This high-speed airflow flows into the turbine chamber 8.
The turbine 18 rotates, which rotates the rotating brush 20 via the rotating shaft 19 and the belt 20, which removes dust from the surface to be cleaned. Nozzle part 2
Inhale with high-speed airflow from 9. Also, at this time, the suction power of the vacuum cleaner body may become large, or the main dust suction port 5 may become too strong.
Or, if the carpet nozzle part 29 is blocked,
The valve body 22 opens against the elastic piece 24, and the auxiliary dust suction ports 6 and 7 are connected to the turbine chamber 8 through the suction passages 9 and 10.
The pressure in the turbine chamber 8 is controlled.

Furthermore, when the floor suction port 1 is lifted from the floor surface in this set state, three air channels are formed and flow into the turbine chamber 8, as in the case of "folding", so that the carpet nozzle section 29 The high-speed airflow created becomes smaller, the rotation of the turbine 18 is weakened, and the noise is reduced.

Next, when the operation knob 34 of the switching valve 31 is set to "both sides" in the center, both the folding nozzle section 28 and the sewing nozzle section 29 are blocked by the valve sections 32 and 33 of the switching valve 31. , the degree of vacuum in the turbine chamber 8 increases, and the valve body 22 provided in the suction passages 9, 10 opens against the elastic piece 24 due to this negative pressure, and the suction passages 9, 10 are opened from the sub-dust suction ports 6, 7, respectively. Air containing dust is sucked into the turbine chamber 8 via a connecting pipe 11, and is further sent to the cleaner body via a connecting pipe 11. In order to prevent dust passing through the suction passage 10 from getting entangled with the rotation shaft 19 of the turbine 18, the suction passage 10 is partitioned by a partition wall 30 formed in the nozzle 27, so that the suction passage 10 crosses the lower side of the rotation shaft 19. It has been formed.

Also, when the floor suction port 1 is lifted from the floor surface in this set state, the valve body 22 is forcibly opened by the rotation of the connecting pipe 11, as in the case of the above-mentioned "folding" and "sitting". Suction passages 9 and 10 leading to the sub-dust suction ports 6 and 7 communicate with the turbine chamber 8 .

As mentioned above, in any of the set states of "folded", "flat", and "both sides", the valve body 22 provided in the suction air passages 9, 10 will respond to the pressure difference between the front and rear of the air passages 9, 10. Therefore, since the vacuum cleaner opens and closes automatically, even if the suction force on the vacuum cleaner body side changes due to an increase in the amount of dust collected, the suction air volume from the main dust suction port 5 does not change much, and the cleaning performance is stable. At the same time, it is possible to reduce noise.

Further, since the sub-dust suction ports 6 and 7 are always communicated with the turbine chamber 8 through the opening 17 provided in the valve body 22 even when the valve body 22 is in the closed state, fine dust is removed from the sub-dust suction ports during cleaning. Since there is always a flow of air even if the air enters the insides of the valve body 22, it is sucked into the turbine chamber 8 together with this air flow, and it adheres to the suction passages 9 and 10, contaminating the passages and causing damage to the valve body 22. It does not cause any hindrance to operation.

As described above, the present invention provides two sets of main and sub-dust suction ports in the part of the floor suction port body facing the surface to be cleaned, and operates in conjunction with the rotation of a turbine installed in the air fluid sucked from the main dust suction port. A rotating brush is provided at the main dust suction port, and the sub dust suction port is communicated with a suction passage whose one end opens at a position where it does not attract the turbine, and the floor suction port main body is connected to the suction passage away from the surface to be cleaned. A valve body is provided that opens when the valve body is closed, and an opening is provided in the valve body through which a small amount of air always flows in the closed state. The interior of the front and rear suction passages can always be kept clean, and the operation of the valve body can also be maintained smoothly over a long period of time.

[Brief explanation of the drawing]

The figure shows an embodiment of the floor suction inlet according to the invention,
Figure 1 is a perspective view from above, Figure 2 is a bottom view,
Figure 3 is a plan view with the top cover removed, Figure 4 is a sectional view taken along line - in Figure 3, Figure 5 is a sectional view taken along line - in Figure 3, and Figure 6 is a connection. Fig. 7 is a perspective view of the valve body, Fig. 8 is a perspective view of the switching valve, Fig. 9 is a perspective view of the nozzle, Fig. 10 is an explanatory diagram of the main part, Fig. 11 is a perspective view of the connecting pipe. It is an operation explanatory diagram. In the figure, 1...floor suction port, 5...main dust suction port, 6,
7... Sub-dust suction port, 9, 10, 16... Suction passage,
22... Valve body, 17... Opening.

Claims (1)

[Scope of Claims] 1. Two sets of main and sub-dust suction ports are provided in a part of the floor suction port body facing the surface to be cleaned, which rotate in conjunction with the rotation of a turbine installed in the air fluid sucked from the main dust suction port. A brush is provided at the main dust suction port, and the sub dust suction port is communicated with a suction passage whose one end is opened at a position where it does not attract the turbine, and when the floor suction port main body is separated from the surface to be cleaned. A floor suction port for a vacuum cleaner, characterized in that a valve body is provided in an open state, and the valve body is provided with an opening through which a small amount of air always flows in a closed state. 2. Claim 1, characterized in that when the floor suction port body is separated from the surface to be cleaned, the floor suction port body tilts forward due to its own weight, and this tilting action opens the valve body. vacuum cleaner floor suction port.