JPH0910142A - Suction port of vacuum cleaner - Google Patents

Abstract

PURPOSE: To increase the sucking amt. of air at a time of cleaning to increase the number of rotations of a rotary brush to certainly scrape up dust by demarcating a turbine chamber into a rotary brush chamber and a drive pipe and sucking the open air from the suction hole formed to a suction port main body to rotate an air turbine. CONSTITUTION: Since a suction port main body 1 is brought into contact with a cleaning surface at a time of cleaning, the dust sucking opening part 2 of the suction port main body 1 is closed by the cleaning surface. Whereupon, the sucking amt. of air sucked from the dust sucking opening part 2 is reduced and, therefore, the sucking amt. of the open air sucked from a suction hole 10 provided to the rear side wall of the suction port main body 1 is increased and the sucking amt. of air flowing through a turbine chamber 8 is also increased to increase the number of rotations of an air turbine 9. By this constitution, the number of rotations of a rotary brush 7 transmitting the rotation of the air turbine 9 by a timing belt 17 is also increased and the dust of a cleaning surface (especially a carpet) is certainly scraped up and sucked efficiently and certainly sucked to efficiently perform cleaning.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with an air turbine which is rotated by suction air of an electric vacuum cleaner in a suction port body,
A rotary brush chamber having a dust suction opening on a lower surface on which a rotary brush driven by a transmission mechanism is arranged by the air turbine is provided in a front portion of a suction port body, and the rotary brush chamber is provided in a rear center of the suction port body. And a suction port of an electric vacuum cleaner that axially supports a drive pipe that communicates with suction air.

[0002]

2. Description of the Related Art An example of a suction port of a conventional vacuum cleaner is shown in FIG.
5 and FIG.

An example of a suction port of a conventional vacuum cleaner is provided with a rotary brush chamber 33 having a dust suction opening 32 on the lower surface at the front of the suction port main body 31, and the rotary brush at the center of the rear portion of the suction port main body 31. A communication portion 34 that communicates with the chamber 33 is provided, and suction air circulates through the communication portion 34 to a cleaner body (not shown) via an extension pipe (not shown) and a suction hose (not shown). The drive pipe 35 to be connected is rotatably supported by the rotary shaft 36 so that the elevation angle can be adjusted, and the rotary brush 37 is disposed in the rotary brush chamber 33.

A turbine chamber 38 is formed in the drive pipe 35, and an air turbine 39 which is rotated by suction air is arranged in the turbine chamber 38. The rotation shaft 40 of the air turbine 39 is the same as that of the drive pipe 3
5, the rotary shaft 3 of the drive pipe 35 being provided inside
It was provided coaxially with the 6.

The rotary shaft 4 of the air turbine 39 is
1, a turbine-side gear 42 is provided, and the turbine-side gear 42
The timing belt 45 is installed between the brush side gear 44 provided on the rotary shaft 43 of the rotary brush 37.

[0006]

In the suction port of the electric vacuum cleaner having the above-mentioned structure, the sucked air is sucked from the dust suction opening of the rotary brush chamber and passes through the rotary brush chamber, and the arrow B in FIG. After rotating the air turbine through the communication part as shown in, since it is sucked into the cleaner body from the drive pipe, at the time of cleaning, in order to bring the suction port into contact with the cleaning surface of the floor, carpet, etc. for cleaning, The dust suction opening is blocked by the cleaning surface, the amount of suctioned air sucked from the dust suction opening decreases, the rotation speed of the air turbine decreases, the rotation speed of the rotating brush decreases, and especially when cleaning the carpet. The rotating brush prevents the brush from being lifted up reliably, resulting in extremely poor cleaning performance.In addition, when the suction port is lifted from the cleaning surface, the amount of intake air taken in from the dust suction opening increases and the rotational speed of the air turbine rises. In order to There is a problem leading to an increase of noise due to the rotation of Atabin.

Further, since the air turbine is provided in the drive pipe, the centers of the rotation axes of the air turbine and the drive pipe must be aligned with each other, and the rotation axis of the air turbine must be parallel to the bottom surface of the suction port. Will be installed in
If the diameter of the air turbine is increased in order to increase the torque of the air turbine, the thickness of the suction port becomes thick and the suction port cannot be put under a narrow gap such as a bed.
Since it was not possible to clean a place with a narrow gap, the diameter of the air turbine could not be increased, and an air turbine with low rotation and high torque could not be obtained.

The suction port of the electric vacuum cleaner according to the present invention has been made in view of the above problems. The suction chamber is formed by partitioning the turbine chamber from the rotating brush chamber and the drive pipe, and an air turbine is provided in the turbine chamber to suction the suction chamber. By sucking external air from the intake hole formed in the mouth body and rotating the air turbine, if the suction port is brought into contact with the cleaning surface during cleaning, the amount of sucked air increases, and the rotation speed of the rotating brush during cleaning. The purpose is to raise and raise dust reliably.

[0009]

In order to solve the above problems, the suction port of the vacuum cleaner of the present invention is provided with an air turbine rotated by the suction air of the vacuum cleaner in the suction port main body. A rotary brush chamber having a dust suction opening on the lower surface for disposing a rotary brush driven by a transmission mechanism is provided in the front part of the suction port body, and communicates with the rotary brush chamber in the rear center of the suction port body. A turbine chamber for rotatably supporting a drive pipe through which suctioned air flows is provided, and a turbine chamber for arranging the air turbine is provided in the suction port body separately from the rotating brush chamber and the drive pipe. An intake hole for sucking air is provided, and a communication port that connects the rotary brush chamber and the turbine chamber is provided in a partition wall with the rotary brush chamber.

The rotating shaft of the air turbine is arranged perpendicularly to the bottom surface of the suction port body, and a rotating direction changing mechanism for changing the rotating direction of the air turbine is provided.

[0011]

With the suction port of the electric vacuum cleaner having the above structure, the dust suction opening of the rotary brush chamber is closed by the cleaning surface during cleaning, so that the suction and suction amount from the suction hole of the suction port body increases. Since the amount of air flowing through the turbine chamber also increases, the number of rotations of the air turbine increases, and the number of rotations of the rotating brush increases, so that dust is reliably scraped. When the suction port is lifted from the cleaning surface, air is sucked from the dust suction opening, so the amount of air sucked from the suction hole is reduced, and the amount of air flowing through the turbine chamber is also reduced. And the noise due to the rotation of the air turbine can be suppressed.

Further, the diameter of the air turbine can be increased without increasing the thickness of the suction port, and it is possible to obtain a high rotational torque at a low speed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the suction port of the vacuum cleaner of the present invention will be described with reference to FIGS.

The first embodiment of the suction port of the electric vacuum cleaner according to the present invention is provided with a rotary brush chamber 3 having a dust suction opening 2 on the lower surface at the front of the suction port main body 1, and at the rear center of the suction port main body 1. Is provided with a communicating portion 4 that communicates with the rotating brush chamber 3. Suction air flows through the communicating portion 4, and an extension pipe (not shown) or a suction hose (not shown) is provided in a cleaner body (not shown). ), A drive pipe 5 connected via a rotary shaft 6 is pivotally supported by a rotary shaft 6 so that the elevation angle can be adjusted.
Is arranged.

A turbine chamber 8 is formed in the rear of the suction port body 1 so as to be adjacent to the communication portion 4 and to be separated from the communication portion 4 (driving pipe 5) and the rotary brush chamber 3 to form a turbine chamber 8. An air turbine 9 that rotates with suction air is provided, an intake hole 10 that takes in external air is provided on the rear side wall of the suction port body 1, and the turbine chamber 8 and the rotating brush chamber 3 are separated from each other. The wall 11 is provided with a communication port 12 that connects the turbine chamber 8 and the rotary brush chamber 3 to each other.

The rotary shaft 13 of the air turbine 9 is
A turbine side gear 14 is provided on the turbine side gear 14, and a timing belt 17 is installed between the turbine side gear 14 and a brush side gear 16 provided on the rotary shaft 15 of the rotary brush 7.

The operation of the suction port of the electric vacuum cleaner having the above structure will be described. Since the suction port main body 1 is brought into contact with the cleaning surface during pressing (being pressed), the dust suction opening 2 of the suction port main body 1 is used. Is blocked by the cleaning surface. Then, the amount of sucked air sucked from the dust suction opening 2 decreases, so that the amount of sucked external air sucked from the suction hole 10 on the rear side wall of the suction port body 1 increases as shown by an arrow A in the figure. Then
Since the amount of suction air flowing through the turbine chamber 8 also increases, the rotation speed of the air turbine 9 increases.

When the rotation speed of the air turbine 9 increases,
The rotation speed of the rotating brush 7 in which the rotation of the air turbine 9 is transmitted by the timing belt 17 is also increased, and the dust on the cleaning surface (especially between the bristles of the carpet) is reliably scraped,
Dust on the cleaning surface is absorbed efficiently and surely to perform efficient cleaning.

When the suction port body 1 is lifted from the cleaning surface, the dust suction opening 2 is opened, and the amount of air sucked from the dust suction opening 2 increases, so that the suction air is sucked from the suction hole 10. The amount of sucked air flowing through the turbine chamber 8 also decreases, the rotation speed of the air turbine 9 decreases, and the rotation speed of the rotating brush 7 also decreases. The noise generated by the rotating brush 7 is reduced, and the noise heard by the user through the dust suction opening 2 is reduced.

Next, the second suction port of the electric vacuum cleaner of the present invention.
An example will be described with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

In the second embodiment of the suction port of the electric vacuum cleaner of the present invention, the rotating shaft 19 of the air turbine 18 is disposed in the turbine chamber 8 perpendicularly to the bottom surface of the suction port body 1, and the air turbine 18 is provided. A first timing belt 21 is installed between a rotary shaft 19 of the air turbine 18 and an intermediate gear 20 which is disposed laterally of the air turbine 18 in a direction perpendicular to the bottom surface of the suction port body 1. The gear 20 and the rotary shaft 15 of the rotary brush 7
The second timing belt 22 between the brush side gear 16 and
Is installed in a crosswise manner (twisted in the middle to convert the rotation direction of the rotary shaft rotating perpendicularly to the bottom surface of the suction port body 1 into the rotation direction of the rotary shaft 15 of the rotary brush 7).

The first timing belt 21, the second timing belt 22, and the intermediate gear 20 are used for the air turbine 9
A rotation direction conversion and transmission mechanism for converting the rotation direction of the above and transmitting it to the rotary brush 7 is configured.

With the above structure, the diameter of the air turbine 18 can be increased without increasing the thickness of the suction port body 1, and the air turbine 18 having a low rotation speed and a high rotation torque can be obtained. That is, as the diameter of the air turbine 18 increases, the rotation speed of the air turbine 18 becomes lower and the rotation torque can be increased. Therefore, the necessary rotation torque can be obtained without rotating the air turbine higher than necessary. be able to. Therefore, it is possible to obtain a low noise suction port with good cleaning performance.

[0024]

In the suction port of the electric vacuum cleaner of the present invention, the dust suction opening of the rotary brush chamber is closed by the cleaning surface during cleaning, so that the suction and suction amount from the suction hole of the suction port body increases. Since the amount of air flowing through the turbine chamber also increases, the number of rotations of the air turbine increases, the number of rotations of the rotating brush can be increased, and dust can be reliably scratched up, and dust can be reliably absorbed. When the suction port is lifted from the cleaning surface, air is sucked from the dust suction opening, so the amount of air sucked from the suction hole is reduced, and the amount of air flowing through the turbine chamber is also reduced. And the noise due to the rotation of the air turbine can be suppressed.

Further, the diameter of the air turbine can be increased without increasing the thickness of the suction port main body, and an air turbine with a low rotation speed and a high rotation torque can be obtained. It is possible to obtain the necessary rotation torque without performing the operation, and to obtain a low noise suction port with good cleaning performance.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a suction port of an electric vacuum cleaner according to the present invention.

FIG. 2 is a perspective view showing a state in which the suction port of the first embodiment of the present invention is viewed from the back side.

FIG. 3 is a sectional view showing a second embodiment of the suction port of the electric vacuum cleaner of the present invention.

FIG. 4 is a cross-sectional view showing an example of a suction port of a conventional vacuum cleaner.

FIG. 5 is a perspective view of a conventional suction port.

[Explanation of symbols]

 1 Suction Port Main Body 2 Dust Intake Opening Portion 3 Rotating Brush Chamber 5 Drive Pipe 6 Rotating Shaft 7 Rotating Brush 8 Turbine Chamber 9 Air Turbine 10 Intake Hole 11 Partition Wall 12 Communication Port 17 Timing Belt

Claims (2)

[Claims] 1. A rotation having an air turbine rotated by suction air of an electric vacuum cleaner in a suction port body, and having a dust suction opening on a lower surface on which a rotary brush driven by the air turbine via a transmission mechanism is disposed. In the suction port of the electric vacuum cleaner, the brush chamber is provided in the front part of the suction port body, and the drive pipe for communicating suction air with the rotating brush chamber is provided at the center of the rear part of the suction port body. A turbine chamber in which the air turbine is installed is provided separately from the rotary brush chamber and the drive pipe,
The suction port main body is provided with an intake hole for sucking external air into the turbine chamber, and a partition wall with the rotary brush chamber is provided with a communication port for communicating the rotary brush chamber with the turbine chamber. Vacuum cleaner suction port. 2. A rotation direction conversion mechanism for converting the rotation direction of the air turbine by arranging the rotation shaft of the air turbine perpendicularly to the bottom surface of the suction port main body. Suction port of the vacuum cleaner described.