JP2000060777A - Suction tool for vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make obtainable a sufficient suction wind for forwarding refuse even below an air turbine storing part in a bottom case for a suction tool while both driving performance and dust sucking performance of the air turbine are simultaneously satisfied. SOLUTION: In the suction tool main body prepd. by connecting a bottom case with a suction hole, a top case 18 and a suction hole joint 19, a wind path continuing from a suction hole 37 provided on the peripheral wall to the suction hole joint 19 is formed and an air turbine 26 rotating and driving a brush 21 arranged in the suction hole by utilizing wind force during suction on the midway of the wind path and a slit facing the floor face is formed in an air turbine storing part in the wind path in the bottom case.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner suction tool.

[0002]

2. Description of the Related Art Conventionally, an electric vacuum cleaner equipped with a rotary brush of an air turbine drive system having a function of scraping out dust trapped in the fur of a carpet or the like for the purpose of improving the suction performance of dust at a suction port. Suction devices are known. As this rotating brush, a small motor is installed in the suction tool to force the brush body to rotate, and an air turbine or fan is installed inside the suction tool to drive the air turbine with suction air to drive the brush body. A rotating turbine brush is known.

Recently, it has been desired to reduce the weight of the suction tool from the viewpoint of improving the usability of the vacuum cleaner. Therefore, a turbine brush that is lighter than a suction tool that uses a heavy power brush is used for the motor. Many of the suction devices used have been used.

In the suction tool using the air turbine, the suction air of the electric vacuum cleaner, which is the drive source of the air turbine, is drawn from the intake port formed in the peripheral wall of the suction tool body, so that the suction air used for sucking dust is used. Also, how to balance the suction wind used to rotate the air turbine and that does not contribute to dust suction is an important factor in determining the performance of the suction tool.

For example, when a large amount of sucked air is passed through the air passage for driving the air turbine, the air turbine is driven more strongly, the torque and the rotational speed are increased, and the scraping performance is improved. However, in this case, the amount of suction air for sending dust on the floor surface to the cleaner body is reduced, and as a result, the improvement of the dust absorption performance is often not observed. On the contrary, if you increase the suction air for sending dust,
The rotation torque of the air turbine cannot be obtained, which further deteriorates the dust absorption performance.

Therefore, the suction wind after driving the air turbine is configured to be a swirling flow in the suction rod of the suction device,
It is proposed that the swirl flow is also used to send dust on the floor surface to the main body of the vacuum cleaner, whereby the suction air is efficiently used and the performance of both is improved at the same time (Japanese Patent Laid-Open No. 9- 28630).

This will be described in detail with reference to the cross-sectional view of the suction tool shown in FIG. 9. Reference numeral 1 is a body of the suction tool, which is connected to a lower case 3 having a suction block 2 and a lower case 3 via a bumper 4. The upper case (not shown) and the mouthpiece joint 5 connected to the center of the rear part between the upper and lower cases.

A rod-shaped rotating brush 6 for scraping up the floor is disposed on the suction rod 2 of the suction tool body 1, and air turbines 7, 7 are attached to both ends of the shaft of the rotating brush 6, respectively. There is.

Intake ports 8, 8 connected to the air turbines 7, 7 are provided on the left and right rear sides and the left and right upper surfaces of the suction tool body 1, respectively.
In addition, each blade 6a of the rotating brush 6 is set at an angle such that the central portion of the blade 6a has a V shape when viewed in plan with the rearward inclining direction. Can be pulled in.

Therefore, the air sucked from the respective intake ports 8 and 8 flows to the respective air turbines 7 and 7 through the left and right air passages 9 and 9 to drive them, and then is drawn into the suction rod 2. Becomes a swirling flow, entrains dust on the floor surface, moves to the central portion, and is sucked from the suction port joint 5 to the cleaner body via an extension pipe (not shown) and a flexible hose.

[0011]

However, the suction wind after driving the air turbine is constituted so as to form a swirling flow in the suction rod of the suction tool, so that both the driving performance and the dust suction performance of the air turbine are simultaneously achieved. Even in the above-described conventional example that is improved, the swirling flow is generated only on the center side of the suction port, and is still sufficient to feed dust under the air turbine housing portion of the lower case of the suction tool. The reality is that no suction wind is obtained.

A technical problem of the present invention is that while satisfying both the drive performance and the dust suction performance of the air turbine at the same time, a suction air sufficient for feeding dust even under the air turbine housing portion of the lower case of the suction tool. To be able to obtain.

[0013]

According to a first aspect of the present invention, there is provided a suction tool for an electric vacuum cleaner, wherein a suction tool main body formed by connecting a lower case having a suction rod, an upper case, and a suction joint to each other is provided. An air passage that connects the intake port provided on the peripheral wall to the suction joint is formed, and an air turbine that drives the brush placed in the suction rod to rotate using the wind force at the time of suction is arranged in the middle of the air passage. A slit facing the floor is formed in the air turbine housing in the air passage of the case.

According to a second aspect of the present invention, the suction tool for an electric vacuum cleaner is formed so that air turbines are installed at both ends of the brush so that air is sucked in from the axial direction and exhausted from the peripheral surface. The position where the slit is formed is set within the range of the influence of the centrifugal force of the air exhausted from the peripheral surface of the rotating air turbine.

Further, according to a third aspect of the present invention, there is provided a suction device for an electric vacuum cleaner, wherein the shaft of the air turbine and the shaft of the brush are formed from pipes which communicate with each other, and holes are provided in respective shaft walls, A part of the air taken in by the turbine is sucked out from the brush side.

[0016]

1 is a top view of a vacuum cleaner suction tool according to an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG.
FIG. 7 is a top view with the upper case removed, FIG. 4 is a side view showing a portion thereof by crushing, FIG. 5 is a bottom view thereof, FIG. 6 is an explanatory view of wind flow around the air turbine, and FIG. Is an explanatory view of the flow of air to the lower side of the air turbine housing portion, and FIG. 8 is a perspective view showing the overall configuration of an electric vacuum cleaner to which the present invention is applied.

First, before describing the vacuum cleaner suction tool of the present embodiment, the overall structure of the electric vacuum cleaner to which the present invention is applied will be described with reference to FIG. 8. Reference numeral 11 indicates a built-in dust collecting portion or an electric blower. The main body of the vacuum cleaner, 12 is the main body 11 of the vacuum cleaner
Connected to the flexible hose, 13 is a hand-operated portion connected to the tip of the flexible hose 12, 14 is an extension pipe connected to the other end of the hand-operated portion 13, and 15 is connected to the extension pipe 14. It is the main body of the suction tool which concerns on this invention.

As shown in FIGS. 2 and 4, the main body 15 of the suction tool is divided into two parts at the center in the height direction, and is made of a lower case 16 and a soft material for preventing scratches on furniture or the like. Upper case 18 joined via the made bumper 17
And a mouthpiece joint 19 connected to the rear center of the upper and lower cases 16 and 18.

The upper case 18 has a front half formed of a removable cover 18a, and a rotating brush 21 housed inside.
Can be removed.

The mouthpiece joint 19 is a vertically movable connecting pipe 1.
9a and a bent pipe 19b attached to the rear end of the bent pipe 19b so as to be rotatable about an axis, and the bent pipe 19b is connected to the extension pipe 14.

As shown in FIG. 5, the lower case 16 has a pair of left and right for the purpose of allowing the main suction device to move smoothly back and forth and for maintaining a constant distance between the main suction device and the floor surface. Front wheels 22 and 22 are provided, and a roller 23 around which a felt is wound to dry and wipe the floor surface is installed on the rear side in addition to the above purpose.

A lower case 16 is provided inside the suction tool body 15.
Rotating brush 2 for scraping up dust at the suction port 20 position of
1 is arranged. The rotary brush 21 has a shaft 24 made of a pipe 24a made of a metal such as aluminum and a tube 24b made of a soft material adhered to the outer circumference of the pipe. The rotary brush 21 is radially provided at a plurality of positions on the circumferential surface of the soft material tube 24b. Plates 25 protruding in a rib shape are provided, and each plate 25 can scrape the floor surface when the brush rotates.

Air turbines 26, 26 are attached to both ends of the rotary brush 21, respectively. The shafts 27, 27 of the respective air turbines 26, 26 are formed of pipes, are connected to the pipe 24a of the shaft 24 of the rotary brush 21 via the pipe joint portions 28, 28, and communicate with each other. Holes 27a, 24c in these shaft walls as shown
Is formed, and part of the air taken in by the air turbines 26, 26 passes through the holes 27a, 27a, the shafts 27, 27, the pipe joint portions 28, 28, and the pipe 24a, and is sucked from the holes 24c of the rotary brush 21. It is supposed to be put out, hole 24
The wind sucked out from c is used to scrape up the dust on the floor.

The shaft 2 of each air turbine 26, 26
The bearings 29,
29 are attached to these bearings 29, 2
9 parts are the lower case 16 and the upper case 18 of the suction tool body 15.
It is adapted to be supported up and down by a half-cylindrical support piece (not shown) provided on the cover 18a and the cover 18a. When the cover 18a is opened and the rotary brush 21 is removed,
Left and right air turbines 26, 26 and bearings 29, 2
9 is also designed to be removed integrally with the rotary brush 21.

As shown in FIGS. 4 and 6, the air turbine 26 has fins 31 formed in a swastika shape, and exhaust holes 32 are provided at positions between the fins on the peripheral surface thereof. The air is sucked from the direction and is driven to rotate by the repulsion of the air sucked from the peripheral surface.

The inner end surfaces of the respective air turbines 26, 26 are slidably closed by the pipe joint portions 28, 28 and partition walls 33, 33 of upper and lower halves which close the periphery thereof, and the outer end surfaces thereof. Is open, and as shown in FIGS. 3 and 7, the outside air introducing air passage 3 to each air turbine 26, 26 is opened.
Only the surroundings of the opening are closed by partition walls 35, 35, which are divided into upper and lower halves and form a partition 4.

As for outside air, as shown in FIGS. 2, 4 and 7, intake ports 36 provided on both side surfaces of the bumper 17 forming a part of the peripheral wall, and an upper case 18 as shown in FIG.
The air introduced into the air passage 34 from the air inlets 37 formed on both side edges of the upper surface of the cover 18a of the cover 18a, and all the air introduced into the air passage 34 enters the openings of the air turbines 26, 26 and mainly It is sucked out from the exhaust holes 32 on the peripheral surface of each air turbine, and a part of the air flows to the rotary brush 21 side through the above-described shaft air passage.

The rear wall 38 of the suction port 20 of the lower case 16 is
As shown in FIGS. 3, 6, and 7, the bottom wall 16 of the lower case 16
A notch 41 serving as a communication passage is formed in a portion facing the storage portion 39 and extends to the rear of the air turbine storage portion (hereinafter, simply referred to as a storage portion) 39 surrounded by a, the partition wall 33, and the partition wall 35. A cutout 42 serving as a communication passage is also formed in a portion facing the suction port 20, and the outside air sucked into the storage portion 39 through the exhaust holes 32 on the peripheral surface of the air turbine is mainly blown from the cutout 41 to the rear wind. It flows into the path 43, from which there is a notch 4
After being sucked into the suction port 20 through the suction port 20, it is carried together with dust from the suction port joint 19 to the cleaner body 11.

The bottom wall 16a of the accommodating portion 39 is provided on the floor surface as shown in FIGS. 3 to 7 within the range of the force due to the centrifugal force of the air exhausted from the peripheral surface of the rotating air turbine 26. A slit 44 is formed so that a part of the outside air sucked into the storage portion 39 through the exhaust hole 32 on the peripheral surface of the air turbine is sucked toward the floor surface from the slit 44. The air sucked out from the slits 44 is set such that the formation position of the slits 44 is within the range of the force due to the centrifugal force of the air exhausted from the peripheral surface of the rotating air turbine 26 as described above. Since there is a negative pressure on the lower surface, it passes through the slit 44 at a high speed and collides with the floor surface, so that the dust on the floor surface is scraped up and the dust is sent to the central suction port 20. In addition, reference numeral 45 in FIGS. 1 and 8 denotes an operation unit (not shown) of the air volume adjusting means, 4
Reference numeral 6 denotes an attachment / detachment operation portion of the cover 18a.

The suction tool for the electric vacuum cleaner according to the present embodiment is constructed as described above, and the wind after driving the air turbine 26 is also sent to the lower side of the air turbine storage section 39 in the lower case 16. Air turbine 26
While satisfying both the drive performance and dust collection performance of
Sufficient suction air for sending in dust can be generated in the entire lateral width below the lower case 16.

Further, the air turbine 16 is attached to the rotary brush 2
1 are installed at both ends of the air conditioner 1, respectively, and are formed so as to intake from the axial direction and exhaust from the peripheral surface, and the formation position of the slit 44 is set to the centrifugal force of the air exhausted from the peripheral surface of the rotating air turbine 16. Since it is set within the range of the accompanying power, the speed of the air sucked out from the slit 44 can be increased, whereby the wind passing through the slit 44 collides with the floor surface and scratches the dust on the floor surface. The dust collection performance can be further improved.

In addition, the shaft 27 of the air turbine 16 and the shaft 24 of the rotary brush 21 are formed of pipes that communicate with each other, and holes 27a and 24c are provided in the shaft walls of the pipes, respectively. Since the part is sucked out from the hole 24c of the rotating brush 21, the wind sucked out from the hole 24c of the rotating brush 21 can be used to scrape up the dust on the floor surface, and the suction port 20 It is possible to further improve the dust absorption performance in the part.

The air volume sucked out from the slits 44 can be adjusted by the number of the slits 44. If it is desired to further increase the air volume, the rear edge of the slits 44 should be
An arc-shaped wind direction plate having a predetermined height and along the peripheral surface of the air turbine 16 may be provided.

Further, the slit 44 is provided in the air turbine 16
May be formed below. In this case, the air turbine 1
It is desirable that the diameter of 6 be made slightly smaller so that the height of the bottom wall 16a of the air turbine housing portion 39 from the floor surface is set higher.

[0035]

As described above, according to the first aspect of the present invention, the lower case having the suction rod, the upper case, and the mouthpiece joint are connected to each other, and are provided on the peripheral wall thereof. An air passage that connects the intake port to the suction joint is formed.In the middle of the air passage, an air turbine that drives the brush placed in the suction rod to rotate using the wind force at the time of suction is placed, and inside the air passage in the lower case. Since a slit facing the floor is formed in the air turbine storage part of the, the suction airflow sufficient for sending in dust while satisfying both the drive performance of the air turbine and the dust absorption performance at the same time Could be generated by.

According to the second aspect of the present invention, the air turbines are installed at both ends of the brush so that air is taken in from the axial direction and exhausted from the peripheral surface, and the slit forming position is rotated. Since it is set within the range of the influence of the centrifugal force of the air exhausted from the peripheral surface of the air turbine, the speed of the air sucked from the slits can be increased to collide with the floor surface. Therefore, the dust sucked on the floor can be scraped up by using the air sucked from the slits, and the dust suction performance can be further improved.

According to the third aspect of the present invention, the shaft of the air turbine and the shaft of the brush are formed of pipes that communicate with each other, and holes are provided in the shaft walls of each of the pipes so that one of the air taken in by the air turbine can be obtained. Since the part is configured to be sucked from the brush side, the wind sucked from the brush hole can be used to scrape up dust on the floor surface, further improving the dust suction performance at the suction port I was able to.

[Brief description of drawings]

FIG. 1 is a top view of a suction device for a vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a side view of the suction tool for the electric vacuum cleaner according to the present embodiment.

FIG. 3 is a top view showing a state in which the upper case of the suction tool for the electric vacuum cleaner according to the present embodiment is removed.

FIG. 4 is a side view showing a crushed part of the suction tool for the electric vacuum cleaner according to the present embodiment.

FIG. 5 is a bottom view of the suction tool for the electric vacuum cleaner according to the present embodiment.

FIG. 6 is an explanatory diagram of a wind flow around the air turbine of the suction tool for the electric vacuum cleaner according to the present embodiment.

FIG. 7 is an explanatory diagram of the flow of air to the lower side of the air turbine housing portion of the suction device for the electric vacuum cleaner according to the present embodiment.

FIG. 8 is a perspective view showing an overall configuration of an electric vacuum cleaner to which the suction tool for the electric vacuum cleaner according to the present embodiment is applied.

FIG. 9 is a cross-sectional view of a conventional vacuum cleaner suction tool.

[Explanation of symbols]

15 suction tool body, 16 lower case, 18 upper case,
19 mouthpiece joint, 20 suction rod, 21 rotating brush,
24 rotating brush shaft, 24c, 27a shaft wall hole, 2
6 air turbine, 27 air turbine shaft, 32 air turbine exhaust hole, 34 outside air introducing air passage, 36, 37
Intake port, 39 air turbine housing, 43 rear air passage, 44 slits.

Claims (3)

[Claims] 1. An air duct connecting an intake port formed in a peripheral wall of the suction tool body to the suction port joint is formed inside a suction tool body formed by connecting a lower case having an intake slot, an upper case and a suction port joint. In the middle of the air passage, an air turbine that rotationally drives the brush arranged in the suction rod by utilizing the wind force at the time of suction is arranged, and in the air turbine storage portion in the air passage in the lower case, on the floor surface. A suction tool for an electric vacuum cleaner, which is characterized by having a slit facing it. 2. An air turbine is installed at each end of the brush so that air is sucked in from the axial direction and exhausted from the peripheral surface, and the slit forming position is exhausted from the peripheral surface of the rotating air turbine. The setting is made within the range of the influence of the centrifugal force of the wind.
The vacuum cleaner suction tool described. 3. The shaft of the air turbine and the shaft of the brush are formed from pipes that communicate with each other, and holes are formed in the shaft walls of each so that part of the air taken in by the air turbine is sucked out from the brush side. The suction tool for an electric vacuum cleaner according to claim 1 or 2, wherein the suction tool is for a vacuum cleaner.