JPS6284730A - vacuum cleaner mouthpiece - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a vacuum cleaner, and more particularly, to an improvement in a vacuum cleaner suction port employing a system in which a rotating brush is driven by a turbine blade.

[Background of the invention]

In vacuum cleaners that employ a system in which a rotating brush is driven by a turbine blade, the turbine blade rotates at high speed, and as the rotation speed of the turbine blade increases, a harsh rotational sound is produced.

In particular, the above-mentioned rotational noise occurs when the vacuum cleaner suction mouth is separated from the cleaning surface. The reason is as follows.

In other words, when the vacuum cleaner suction port is moved away from the cleaning surface, the load on the rotating brush decreases and the rotational torque of the turbine blade increases. This is for the purpose of

However, the sound generated at the suction port of a vacuum cleaner is mainly fluid-generated sound, and the noise level is 5PL (dB (A)).
) and the flow velocity u (m/sl) are said to have a relationship of SPLmu'~' (that is, the noise level is proportional to the 4th to 8th power of the flow velocity).

Conventionally, as a measure to reduce the above-mentioned noise as much as possible, in vacuum cleaners in which the casing forming the turbine chamber is rotatably slid against the suction case, a bypass hole is installed in the upper surface of the casing. By providing this, when the vacuum cleaner suction port is moved away from the cleaning surface, the suction case tilts forward, communicating the turbine chamber with the outside air, reducing the amount of air hitting the turbine blades, and reducing the turbine torque. I have to.

However, in recent years, the negative pressure in the turbine chamber tends to increase due to the increase in the power of vacuum cleaners and the miniaturization of vacuum cleaner suction ports aimed at increasing the speed of turbine blades. , the suction case deforms and the sliding movement between the casing that forms the turbine chamber and the suction case does not occur smoothly, and when the vacuum cleaner suction port is removed from the surface to be cleaned, the original structure on the upper surface of the casing in the turbine chamber is removed. This causes a problem in that it becomes difficult for the bypass hole that is connected to the outside to pass through.

In order to eliminate the above-mentioned problems, it is possible to increase the opening area of the suction port located on the bottom surface of the brush chamber and keep the negative pressure in the turbine chamber small, but with this configuration,
When using a vacuum cleaner, the flow velocity of the fluid colliding with the turbine blades decreases, creating a new problem in that the turbine torque decreases.

In addition, the Utility Model No. 59 entitled "Brush Rotating Floor Suction Tool"
Publication No. 108549 discloses a technology related to braking of turbine blades, but the brake mechanism disclosed in the publication is only manually operated, and as described later, This is essentially different from the present invention, which attempts to automatically reduce noise when the object is moved away from the cleaning surface.

[Purpose of the invention]

As mentioned in the above [Background of the Invention] section, the purpose of the present invention is to reduce noise when the vacuum cleaner suction port is separated from the cleaning surface. By reducing the flow velocity of the inflowing fluid, the noise emitted from the vacuum cleaner suction port can be automatically reduced. The purpose is to provide an improved vacuum cleaner.

[Summary of the invention]

In order to achieve the above object, the present invention includes a brush chamber that houses a rotating brush therein and has a suction port on the lower surface, and a turbine chamber that includes a built-in turbine blade that drives the rotating brush, and further comprises: A vacuum cleaner having a structure in which a vacuum cleaner communicates with a turbine chamber is provided with a pressure detection part that detects the pressure in the brush chamber, and when the vacuum cleaner suction port is separated from the cleaning surface and the negative pressure in the brush chamber becomes small, The present invention is characterized in that it includes an auxiliary opening that increases the amount of air sucked into the turbine chamber in conjunction with the operation of the pressure detection section.

[Embodiments of the invention]

Hereinafter, the present invention will be explained based on an embodiment shown in FIGS. 1 to 7. FIG. 1 shows the vacuum cleaner suction port 100 separated from the cleaning surface and the valve body 30 in the inoperative state. FIG. 2 is a vertical sectional view of the main part taken along line A-A, and FIG. 2 is a longitudinal sectional view of the main part corresponding to FIG. 3 is a sectional view taken along line BB in FIG. 2, FIG. 4 is a perspective view of the entire vacuum cleaner with the top cover 23 removed from the suction case 1, FIG. 5 is a cross-sectional view of FIG. 4, and FIG. 5
7 is a sectional view taken along line CC in the figure, and FIG. 7 is a sectional view taken along line DD in FIG.

FIG. 4 shows the entire vacuum cleaner with the top cover 23 removed from the suction case 1, FIG. 5 is a cross-sectional view of FIG. 4, and C of FIG.
In FIG. 6, which is a sectional view taken along the line C-C, a brush chamber 2 in which a rotary brush 3 is housed at the front of a suction case 1 forming the body frame of the vacuum cleaner suction port 100 and having a suction port 4 on the lower surface thereof is shown.
is formed. At the center of the rear part of the suction case 1, a cylindrical pipe is formed in a substantially T-shape, and a casing 6 having an opening in the front is provided with an annular shaft 6a protruding from both sides thereof.

The casing 6 is rotatably attached to the suction case 1 via the casing 6, and the casing 6 forms a turbine chamber 5. The casing 6 has a built-in turbine blade 7 that drives the rotating brush 3. . At the rear end of the casing 6, there is an extension pipe (
A pipe-shaped suction joint 8 connected to a pipe (not shown) is rotatably fitted around its axis. Annular shafts 6a, 6a
The front ribs 6b and 6c, which are approximately arc-shaped with the center at the center and located on the upper and lower surfaces of the casing 6, are in contact with the inner wall of the mouthpiece case 1, which is also approximately arc-shaped. Projecting side ribs 6d.

6d slides in contact with both side walls of the suction case 1 to keep the turbine chamber 5 airtight. The upper wall surface of the casing 6 has a peripheral rib 6e that is in contact with the inner wall surface of the suction case 1.
A bypass hole 9 surrounded by
The turbine chamber 5 and outside air are communicated through the bypass hole 9. The shaft 10 of the turbine blade 7, which is unevenly located on one side of the turbine chamber 5, passes through one of the annular shafts 6a, 6a located at the side end of the casing 6, and is fixed to the suction case 1. It is rotatably supported by an annular bearing 11. The rotation of the turbine blade 7 is transmitted to the rotating brush 3 via a belt 12 that is hung on one end of the shaft 10. The rotating brush 3 is rotatably supported by the mouthpiece case 1 via bearings 13, 13 supporting both ends thereof, and brushes 14 are helically flocked on the surface of the rotating brush 3. The brush chamber 2 and the turbine chamber 5 are separated by a partition wall 15, and the partition wall 15 includes turbine blades 7.
A turbine vent 16 is provided at a position facing the turbine. Further, the partition u15 is provided with a floor vent 17 which is located in a part separated from the turbine blade 7 and has a larger opening area than the turbine vent 16. It is opened and closed by a switching lever 18 that is in close contact with 15 and slides laterally. A front wheel 19 and a rear wheel 20 are attached to the suction case 1 to move the entire suction port 100 in the front-rear direction, and the bottom of the suction case 1 is provided with a suction static pressure (negative pressure) near the suction port 4. For the purpose of increasing the height, an elastic membrane body 21 is installed behind the suction port 4 at a height such that it contacts the floor surface. The mouthpiece case 1 is divided into upper and lower halves at approximately the height of the center shaft, and a shock absorbing bumper 22 is sandwiched between the divided surfaces to airtightly hold the mating surfaces of the two divided members. An elastic upper cover 23 is removably attached to the upper surface of the brush chamber 2.

L-shaped rib 23a continuous to the front part of this upper lid 23
is inserted into a fitting hole 24 provided in the front wall of the suction case 1, and at the rear of the upper lid 23, a pair of left and right sliders attached to the rear side of the upper lid 23 and slidable in the front and rear direction The knobs 25° 25 are engaged with engagement holes 26, 26 provided on both sides of the upper surface of the mouthpiece case 1.

As shown in FIG. 7, which is a sectional view taken along line DD in FIG. 5, the upper lid 23 is attached to the mouthpiece case 1.

The peripheral edge portion 23b of the upper lid 23 contacts the shock absorbing bumper 22, and a gap δ exists between the stopper rib 23c protruding from the rear of the upper lid 23 and the rib receiver portion 1a provided on the mouthpiece case 1. .

1 along the A-A line in FIG. 5 with the vacuum cleaner suction port 100 separated from the cleaning surface and the valve body 30 in the inoperative state, and the vacuum cleaner suction port 100 in close contact with the cleaning surface and the valve body 30 in the operational state. Figure 2 corresponds to Figure 1, and further, B- in Figure 2.
In FIG. 3, which is a cross-sectional view of B, a pressure detection part 23d is formed at the center of the rear end of the upper M23 and protrudes downward. It passes through the guide hole 27 and faces into the brush chamber 2 adjacent to the turbine vent 16. On the other hand, an auxiliary opening 29 having a valve body 30 rotatably supported on the suction case 1 by a pin shaft 28, 28 is provided in the upper part of the turbine vent 16.

The present invention has the above-described configuration, and next, the operation of the above embodiment will be explained.

When cleaning the floor with the vacuum cleaner suction port 100 in close contact with the cleaning surface, move the switching lever 1 in the direction that opens the floor ventilation port 17.
Slide 8. When the floor vent 17 is opened as described above, the air containing dust sucked into the suction port 4 passes through the floor vent 17 and the turbine vent 16 and enters the turbine chamber 5. Enter, then
It is led to the vacuum cleaner main body side through the suction joint 8. At this time, the turbine vent 16 has a smaller opening area than the floor vent 17, and moreover, the turbine vent 16 has a smaller opening area than the floor vent 17.
7 are open at the same time, the flow velocity of the fluid colliding with the turbine blade 7 is low, and the amount of air is also small, so the turbine blade 7 does not rotate.

On the other hand, when brushing the carpet with the rotating brush 3, the switching lever 18 is slid in a direction to close the floor vent 17. When the floor vent 17 is closed as described above, the dust-laden air sucked into the suction port 4 passes through the turbine vent 16 and collides with the blade 7, causing the blade 7 to rotate.

The rotating brush 3 is driven.

When brushing a carpet with the rotating brush 3, when the vacuum cleaner suction port 100 is brought into close contact with the cleaning surface, negative pressure is generated in the brush chamber 2, and as shown in FIGS. is pulled downward, and the gap shown by the symbol δ in FIG. A pressure detection portion 23d formed at the center of the rear end of the upper lid 23 projects to the front surface of the auxiliary opening 29. As described above, when the pressure detection part 23d protrudes to the front surface of the auxiliary opening 29, the valve body 30, which had been rotated clockwise by the flow of air passing through the turbine vent 17, moves to the pressure detection part 23d. 23d and its rotation is stopped. At this time, the valve body 30 receives force in the clockwise direction from the air flowing through the turbine vent 17, which is closer to the suction port 4 than the valve body 30, so it does not rotate in the counterclockwise direction. Therefore, the auxiliary opening 29 is always closed by the valve body 30, and by closing the auxiliary opening 29, the turbine torque is increased, which not only makes it possible to brush the carpet well, but also makes it easier to clean the vacuum cleaner. Since the suction port 100 is in close contact with the surface to be cleaned, the flow velocity of the fluid colliding with the turbine blade 7 is low, and the amount of air is also small, so the rotation noise of the turbine blade 7 is small.

On the other hand, when the vacuum cleaner suction port 100 is turned away from the cleaning surface, the negative pressure in the brush chamber 2 becomes smaller, and the upper cover 23 returns to its original position due to its own elastic effect. , the pressure detection part 23d also moves upward, the valve body 30 rotates clockwise, and the auxiliary opening 29 opens. Therefore, at this time, the area of the turbine vent 17 corresponds to the auxiliary opening 29. Therefore, the flow velocity of the fluid passing through the vent port 17 can be reduced, the rotation noise of the turbine blades 7 is small, and the suction port 4
The noise emitted to the surrounding area is also small.

In the above embodiment, by providing the bypass hole 〇 in the upper wall surface of the casing 6 that forms the turbine chamber 5, when the vacuum cleaner suction port 100 is separated from the cleaning surface, the suction case 1 tilts forward and the turbine The present invention has been exemplified in the case where the present invention is applied to a vacuum cleaner of the type that connects the chamber 5 with the outside air, reduces the amount of air that impinges on the turbine blades 7, reduces the turbine torque, and reduces noise. According to , the area corresponds to the area of the auxiliary opening 29 not only after the vacuum cleaner suction port 100 is separated from the surface to be cleaned until the turbine chamber 5 is communicated with the outside air via the bypass hole 9, but also thereafter. Since the area of the turbine vent 17 increases by that amount, the sliding movement between the casing 6 forming the turbine chamber 5 and the suction case 1 is always performed smoothly, and therefore, this type of vacuum cleaner power up,
Furthermore, it is possible to easily reduce the size of the vacuum cleaner suction port 100 for the purpose of increasing the speed of the turbine blade 7 without impairing the operability of the vacuum cleaner.

FIG. 8 shows another embodiment of the present invention, in which:
The same reference numerals as in FIGS. 1 to 7 refer to the same maple parts. In other words, 1 is the suction case forming the main frame of the vacuum cleaner suction port 100, 2 is the brush chamber, and 5 is the turbine chamber formed by the casing 6. , 6a, 6a is the annular shaft of the casing 6, 7 is the turbine blade, 10 is the axis of the turbine blade 7, 1
5 is a partition wall that partitions between the brush chamber 2 and the turbine chamber 5;
Reference numerals 16 and 17 indicate a turbine vent and a floor vent provided in the partition wall 15, respectively, and 18 indicates a switching lever for opening and closing the floor vent 17.

Therefore, in the embodiment of FIG. 8, the turbine blade 7
A pressure detection section 31 is provided in a part of the partition wall 15 facing the pressure detection section 31 , and an auxiliary opening 32 is provided in the pressure detection section 31 .
It is closed by a valve body 33 via a built-in spring 34.

In the above configuration, when cleaning the floor with the vacuum cleaner suction port 100 in close contact with the cleaning surface, by sliding the switching lever 18 in the direction of opening the floor vent 17,
This is carried out in the same manner as in the first embodiment described above.

On the other hand, when brushing a carpet with the rotating brush 3, the switching lever 18 is slid in the direction to close the floor vent 17, and the vacuum cleaner suction port 100 is When the auxiliary opening 32 is brought into close contact with the surface to be cleaned, negative pressure is generated in the brush chamber 2. Therefore, the auxiliary opening 32 is always closed by the valve body 33, and due to the auxiliary opening 32 being closed, a large Turbine torque can be used to brush carpets.

On the other hand, when the vacuum cleaner suction port 100 is moved away from the cleaning surface, the pressure in the turbine chamber 5 becomes lower than that in the brush chamber 2, and this pressure difference causes the valve body 33 that had previously blocked the auxiliary opening 32 to leaves the auxiliary opening 32. Therefore, at this time, the area of the turbine vent 16 increases by an amount corresponding to the auxiliary opening 32, so the flow velocity of the fluid passing through the vent 16 can be reduced.
As a result, as in the first embodiment, the rotation noise of the turbine blades 7 is small, and the noise emitted from the suction port 4 is also small.

In addition, as shown in the illustrated embodiment, a pressure detection section (in the first embodiment, a pressure detection section 23d) detects the pressure in the brush chamber 2.
In addition, if the reference numeral 31) in the second embodiment is operated by the differential pressure between the brush chamber 2 and the turbine chamber 5, the configuration is extremely simple, and this type of vacuum cleaner is easy to manufacture. and contributes to cost reduction.

〔Effect of the invention〕

As is clear from the description of the illustrated embodiments, according to the present invention, noise can be reduced when the vacuum cleaner suction port is separated from the cleaning surface. By reducing the flow velocity of the inflowing fluid, the noise emitted from the vacuum cleaner suction port can be automatically reduced. You can get an improved vacuum cleaner.

[Brief explanation of drawings]

FIGS. 1 to 7 show an embodiment of the vacuum cleaner according to the present invention, and FIG. 1 shows A in FIG. 2 is a vertical sectional view of the main part along line A, FIG. 2 is a longitudinal sectional view of the main part corresponding to FIG. The figure is a sectional view taken along line B-B in FIG. 2, FIG. 4 is a perspective view of the entire vacuum cleaner with the top cover 23 removed from the suction case 1, FIG. C- in the diagram
7 is a sectional view taken along line D--D in FIG. 5, and FIG. 8 is a cross-sectional view of essential parts showing another embodiment of the vacuum cleaner of the present invention. 100... Vacuum cleaner suction port, 1... Suction port case, 1a.
... Rib receiver is part, 2 ... Brush chamber, 3 ... Rotating brush, 4 ... Suction port, 5 ... Turbine chamber, 6 ... Casing, 6a ... Annular shaft, 6b and 6c... Front rib, 6d... Side rib, 6e... Surrounding rib, 7...
・Turbine blade, 8... Suction joint, 9... Bypass hole, 10... Shaft, 11... Annular bearing, 12... Belt, 13... Bearing, 14... Brush, 15 ...Partition wall, 16...Turbine vent, 17...Floor vent, 18...Switching lever, 19...Front wheel, 20...
・Rear wheel, 21...Membrane body, 22...WI@absorption bumper, 23...Top lid, 23a...L-shaped rib, 23b
... Peripheral portion, 23c... Dead-end rib, 23d...
Pressure detection part, 24... Fitting hole, 25... Knob, 26
...Engagement hole, 27...Guide hole, 28...Pin shaft, 29...Auxiliary opening 1, -J logic; (1 idiot)・r, no" 1st Ward Sister 4-Country Merasen T Prisoner

Claims (1)

[Scope of Claims] 1. A brush chamber that houses a rotating brush inside and has a suction port on the lower surface, and a turbine chamber that includes a built-in turbine blade that drives the rotating brush, and further includes a brush chamber and a turbine chamber. A vacuum cleaner configured to communicate with the brush chamber is provided with a pressure detection section that detects the pressure in the brush chamber, and when the vacuum cleaner suction port is moved away from the cleaning surface and the negative pressure in the brush chamber becomes small, the pressure detection section is configured to communicate with the brush chamber. A vacuum cleaner characterized by being equipped with an auxiliary opening that increases the amount of air sucked into a turbine chamber in conjunction with the operation of the vacuum cleaner. 2. The vacuum cleaner according to claim 1, wherein the pressure detection section that detects the pressure in the brush chamber has a mechanism that operates based on the differential pressure between the brush chamber and the turbine chamber.