JPH01166729A - Suction port for electric cleaner - Google Patents

Abstract

PURPOSE: To prevent noise when the main body of a nozzle is drawn away from a surface to be cleaned by installing a nozzle with a connecting pipe made of hose and extension pipe to connect to a cleaner main body, a nozzle which is supported jogging and turning free at the hind part of the same and facing a turbine chamber, and with a wind volume controlling device to be equipped in the nozzle. CONSTITUTION: While operating cleaning and when a nozzle 11 is temporarily drawn away from a surface to be cleaned, a connecting pipe 41 is so installed to turn freely at the hind part of the nozzle 11 that the same is turned downward by its own weight making an angle of elevation of the same to the minimum. On this time, the turning of the connecting pipe 41 is conveyed to a valve 71 by pulleys 73, 75 and a belt 76 and the valve 71 turns around the pulley 73 as a center, and a part of a connecting opening 30 facing to a wind duct 55 is opened and the part's open area becomes large. Thus, most of the sucking-in air stream to a turbine chamber 27 from the connecting opening 30 flows into the wind duct 55 making the sucking-in air stream blowing a turbine 51 reduced, the rotation of the turbine 51 slowed down or seized, the rotation of a brushing rotor slowed down or seized and the noise is reduced tremendously.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention relates to a suction port body of a vacuum cleaner equipped with a turbine that is rotated by a suction airflow and rotationally drives a rotating brush, and in particular, The present invention relates to a structure that prevents noise when the suction port body is separated from the surface to be cleaned.

(Prior art) Conventionally, a rotating brush facing the suction port and a turbine that is rotated by the suction airflow and rotationally driving the rotating brush are provided in a suction port body having a suction port on the bottom surface. BACKGROUND ART A separate suction port body for electric cleaning is known in which a connecting pipe for connection to the main body of the machine is provided so as to be rotatable up and down. And, in the suction mouth body of this kind of conventional vacuum cleaner,
An air volume control valve body is provided to adjust the opening area of the communication port that communicates the rotating brush chamber and the turbine chamber in the suction port body, and by manually operating this valve body using a switching lever, etc. A structure has also been adopted that allows for control. However, the air volume control valve body is used to select whether the rotary brush should rotate or not depending on the type of surface to be cleaned, such as floors, tatami mats, and carpets, and is not intended to prevent noise. Ta. The suction port body of conventional vacuum cleaners of this type has a structure in which the state of the communication port does not change whether the suction port body is grounded to the surface to be cleaned or separated from the surface to be cleaned. .

(Problem to be Solved by the Invention) However, in the conventional structure described above, when cleaning by rotating the rotating brush, even when the suction port main body is temporarily separated from the surface to be cleaned, the turbine and rotating Since the brush continues to rotate, there is a problem in that noise is generated even though cleaning is not actually being performed. Furthermore, when the suction port main body is separated from the surface to be cleaned, the amount of air flowing in increases from the suction port remote from the surface to be cleaned, so the noise becomes louder than when the suction port main body is grounded.

The present invention aims to solve the above-mentioned problems, and aims to provide a suction port body for a vacuum cleaner that can prevent noise when the suction port body is separated from the surface to be cleaned. It is.

[Structure of the invention]

(Means for Solving the Problems) The suction port body of the vacuum cleaner of the present invention has a rotating brush chamber provided at the front side of the interior, and a turbine chamber communicated with the rotating brush chamber through a communication port at the rear of the interior. a suction port body provided on the side and provided with a suction port on the bottom facing the rotating brush chamber;
A rotating brush is rotatably supported in a rotating brush chamber of the suction port body, and a rotating brush is rotatably supported in a turbine chamber of the suction port body facing a part of the communication port and rotated by the suction airflow from the communication port. a turbine that rotationally drives the rotating brush; a connecting pipe that is supported at the rear of the suction port body so as to be vertically rotatable facing the turbine chamber and is connected to, for example, a vacuum cleaner body via a hose and an extension pipe; and an opening area of a portion of the communication port that does not face the turbine when the elevation angle of the connection pipe with respect to the suction port body becomes large, and is located within the suction port body and interlocks with the connection pipe. The air pressure control valve body is provided with a wind noise control valve body that increases the opening area of a portion of the communication port that does not face the turbine when the angle of elevation of the connecting pipe becomes small.

(Function) The suction port body of the vacuum cleaner of the present invention is used for cleaning, for example, by connecting a hose to the vacuum cleaner body, connecting an extension pipe to this hose, and connecting a connecting pipe to this extension pipe. However, when the main body of the suction port is moved over a surface to be cleaned such as a carpet by holding the grip of the hose, the connecting pipe moves upward and downward relative to the main body of the suction port. When the suction port body is grounded, the elevation angle of the connecting pipe with respect to the bottom surface of the suction port body, that is, the surface to be cleaned, is usually large, so the air volume control valve body that is linked to the connecting pipe rotates. The opening area of the portion of the communication port between the brush chamber and the turbine chamber that does not face the turbine is reduced. Therefore, the volume of airflow that is sucked in from the suction port along with dust and blown to the turbine from the communication port through the rotating brush chamber increases, so the turbine is rotated by this suction airflow, and the rotating brush is rotated by this turbine. The rotating brush scrapes out dust from carpets, etc. On the other hand, if you lift the suction port body and temporarily move it away from the surface being cleaned during cleaning,
Since the connecting pipe is rotatably supported at the rear of the suction port body, the suction port body rotates downward by its own weight with respect to the connecting pipe, and the connection pipe is rotated with respect to the bottom of the suction port body as a reference. Since the elevation angle is minimized, the air volume control valve body is in a state where the opening area of the portion of the communication port that does not face the turbine is maximized. Therefore, the wind noise of the airflow blowing onto the turbine becomes smaller, so the rotation of the turbine decreases or stops, the rotation of the rotating brush also decreases or stops, and noise is prevented.

(Example) Hereinafter, the structure of a first example of the suction port body for a vacuum cleaner of the present invention will be described with reference to FIGS. 1 to 4.

Reference numeral 11 denotes a suction port body, which includes a main body case 13 having an opening 12 formed on the front side of the upper part, and a case-like lid with an open bottom surface which is detachably attached to the main body case 13 and closes the opening 12 so as to be openable and openable. It consists of a body 14. Further, the main body case 13 includes a lower case member 1 having an open upper surface.
5, and an upper case member 16 which is connected to the rear part of the upper surface of the lower case member 15 with screws or the like and whose lower surface is open. Further, a bumper 17 is provided on the outer peripheral surface of the suction port body 11 to protrude outward. This bumper 17 is composed of the lower case member 15 and the upper case member 16.
and the lid 14.

Further, inside the suction port main body 11, a rotating brush chamber 25 and an interlocking mechanism chamber 26 are separated by partition walls 21.22.23.24 which are integrally formed with both the case members 15.16 and joined to each other. A turbine chamber 27, a turbine holding chamber 28, and a belt chamber 29 are partitioned. That is, a rotary brush chamber 25 is formed on the front side by a front and rear partition wall 21 extending in the left-right direction and having a communication port 30 formed in the center, and a pair of left and right partition walls 22 extending rearward from both side edges of the communication port 30. An interlocking mechanism chamber 26, a turbine chamber 21 facing the communication port 30, and a turbine holding chamber 28 are formed side by side in the rear side, and partition walls 23 formed on both sides of the rotating brush chamber 25 are formed. With the partition wall 24 formed on one side of the turbine holding chamber 28,
Two belt chambers are formed on the sides of the rotating brush chamber 25 and the turbine holding chamber 28.

Then, facing the rotating brush chamber 25, the suction port main body 1
A suction port 31 is formed on the lower surface of 1, and
The opening 12 also faces the rotating brush chamber 25.

Further, an insertion hole 32 is formed in the rear surface of the suction port body 11 facing the turbine chamber 21 .

Reference numeral 41 denotes a connecting pipe provided at the rear of the suction port body 11 so as to be rotatable back and forth at a predetermined angle. It consists of a bent cylindrical connecting tube 43 that is movably fitted and connected. The front portion 1. t
It is formed as a semi-cylindrical portion 44 with one front side open, and support shafts 45 are formed on both side surfaces of this semi-cylindrical portion 44 to protrude outward in the left-right direction. The semi-cylindrical portion 44 has its supporting shafts 45 on both sides rotatably fitted into bearing holes 46 formed at the joints of both case members 15 and 16 in the partition walls 22 on both sides of the turbine chamber 21. As a result, the connecting pipe 43 is supported in the turbine chamber 27 so as to be freely rotatable in the front and rear directions, and the connecting pipe 43 is projected rearward through the insertion hole 32 of the turbine chamber 27 so as to be freely tiltable. ing. Furthermore, seal protrusions 47 are formed on the upper and lower edges of the front surface of the semi-cylindrical portion 44 to protrude outward, respectively, and are located on the upper and lower edges of the insertion hole 32. Stopper protrusions 48 are provided on both case members 15 and 16, with which the seal protrusions 47 are abutted from the front, respectively.
are formed to protrude inwardly, and these protrusions 47
．． The rotation range of the rotation tube 42 is restricted to a certain angle by the contact between the 4Bs or the contact between the rotation tube 42 and the connection tube 43 against the upper and lower edges of the insertion hole 32. ing.

Reference numeral 51 denotes a turbine, and a rotating shaft 52 is fixedly inserted through the turbine 51 in the left-right direction.
A bearing 53 is rotatably fitted, and a gear-shaped pulley 54 is fixed to an end opposite to the turbine 51. Since the bearings 53 are supported and fixed to the partition walls 22.24 on both sides of the turbine holding chamber 28, the turbine 51 is rotatably supported within the turbine chamber 27. Inside, the turbine 51 is offset to one side (to the right in FIG. 1) in the direction of its central axis.
A ventilation passage 55 is defined between the left end face and the left partition wall 22 in FIG. Furthermore, the pulley 54 is located within the belt chamber 29.

Reference numeral 61 denotes a rotating brush, and a plurality of brush bristles 63 are spirally arranged on the outer peripheral surface of a cylindrical brush stand 62. Further, a rotating shaft 64 extending in the left-right direction is fixed to both ft1A portions of the brush stand 62. Further, a gear-shaped pulley 65 is fixed to one end of the brush stand 62. Furthermore, bearings 66 are rotatably fitted to both of the rotating shafts 64, and these bearings 66 are formed at both ends of the suction port body 11 to be located on the sides of the rotating brush chamber 25. The rotating brushes 61 are non-rotatably fitted into the groove-shaped bearing support portions 67, respectively.
is rotatably supported within the rotating brush chamber 25. Note that both ends of the rotating brush 61 are rotatably inserted into through holes 68 formed in the partition walls 23 on both sides of the rotating brush chamber 25.

A rotating brush 61 located within the belt chamber 29
An endless timing belt 69 made of rubber or the like is stretched between the pulley 65 of the turbine 51 and the pulley 54 of the turbine 51.

Reference numeral 71 denotes a wind volume control valve body formed in a plate shape, and this wind volume control valve body 71 opens and closes a portion of the communication port 30 that does not face the turbine 51, that is, a portion facing the ventilation passage 55 in the turbine chamber 27. It has an engaging protrusion 72 on the side. In addition, a gear-shaped pulley 73, which also serves as a support shaft and whose rotational axis direction is in the left-right direction, is rotatably supported through the front part of the partition wall 22 on the left side in FIG. 1 facing the turbine chamber 27. There is. The engagement protrusion 72 of the valve body 71 is fitted into a slit portion 74 formed in the pulley 73, so that the pulley 73 and the valve body 71 are integrated. On the other hand, the rotating tube 4 of the connecting tube 41
A gear-shaped pulley 75 is coaxially fixed to the left support shaft 45 in FIG. In the interlocking mechanism chamber 26, an endless timing belt 76 made of rubber or the like is stretched between a pulley 73 of the valve body 71 and a pulley 75 of the rotary tube 42.

Further, the ratio of the number of teeth of both pulleys 73.75 is
When the elevation angle with respect to the bottom surface of the suction port body 11 becomes maximum, that is, when the connecting pipe 41 makes the maximum angle with the extended surface of the bottom surface of the suction port body 11, the valve body 71 moves toward the communication port 30.
When the angle of elevation of the connecting pipe 41 is the minimum, that is, when the connecting pipe 41 forms the minimum angle with the extended surface of the bottom of the suction port main body 11, the valve The body 71 is set to be substantially perpendicular to the communication port 30, that is, substantially horizontal to the bottom surface of the suction port body 11. That is, since the rotation range of the rotation tube 42 is restricted, the rotation range of the valve body 71 is also limited to about 9
It is regulated to 0".

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

When cleaning, for example, a hose is connected to the cleaner body, an extension pipe is connected to this hose, and a connecting pipe 43 of the connecting pipe 41 is connected to this extension pipe. And the user
Holding the grip of the hose, etc., the suction port body 11 is run on a surface to be cleaned, such as a carpet. At this time, the rotating pipe 42 of the connecting pipe 41 can move up and down with respect to the suction port main body 11, and the bent connecting pipe 43 can rotate in the circumferential direction with respect to the rotating pipe 42, so that the suction port main body 11 can be run easily.

Then, the dust sucked in from the suction port 31 of the suction port main body 11 along with the suction airflow by the drive of the electric blower inside the vacuum cleaner main body is transferred to the rotating brush chamber 25, the communication port 30, the turbine chamber 27, the connecting pipe 41, It is led to the dust collection chamber of the vacuum cleaner body via an extension tube and hose.

By the way, when the suction port main body 11 is grounded, that is, when the bottom surface of the suction port main body 11 having the suction port 31 is closely opposed to the surface to be cleaned, normally, as shown by the solid line in FIG. The angle of elevation is increasing. This is because if the elevation angle of the connecting pipe 41 is small, the grip portion of the hose is positioned too low, resulting in poor operability. At this time, the valve body 71 substantially closes the portion of the communication port 30 facing the ventilation passage 55, and the opening area of the portion of the communication port 30 that does not face the turbine 51 becomes small. Therefore, most of the suction airflow flowing into the turbine chamber 27 from the communication port 30 is blown toward the turbine 51 . That is, since the amount of the suction airflow blown onto the turbine 51 increases, the turbine 51 is rotated by this suction airflow. The rotation of this turbine 51 is caused by pulleys 54, 65 and belt 6.
9 to the rotating brush 61, and this rotating rotating brush 61 scrapes out dust from a carpet or the like.

Note that the above-mentioned expression that the opening area becomes smaller includes the case where the opening area is completely closed.

On the other hand, when the suction port main body 11 is lifted up and temporarily separated from the surface to be cleaned in order to slightly change the area to be cleaned, the connecting pipe 41 is rotatably supported at the rear of the suction port main body 11. 2, the suction port main body 11 rotates downward (clockwise in FIG. 2) with respect to the connecting pipe 41 by its own weight, and the suction port main body 11
The angle of elevation with respect to the base of is the minimum. At this time, the rotation of the connecting pipe 41 is transmitted to the valve body 71 via the pulleys 73, 75 and the belt 76, and this valve body 71
2 in the clockwise direction in FIG. 2, the portion of the communication port 30 facing the ventilation path 55 is opened, and the opening area of this portion is increased. Therefore, most of the suction airflow flowing into the turbine chamber 27 from the communication port 30 flows not into the turbine 51 side but into the ventilation path 55 where the air path resistance is low. Therefore, the amount of suction airflow blown onto the turbine 51 is reduced, so the rotation of the turbine 51 is reduced or stopped, and the rotation of the rotating brush 61 is also reduced or stopped, resulting in a significant reduction in noise.

Thus, according to the above configuration, noise can be prevented when the suction port main body 11 is separated from the surface to be cleaned. By changing the opening state of the communication port 30, this is different from a structure in which an opening provided on the outer surface of the suction port body facing the turbine chamber is opened and closed in conjunction with the raising and lowering of the suction port body. There are no problems with airtightness, etc.

Note that the connecting pipe 41 and the rotatable valve body 71 are connected to the belt 1.
Instead of 6, it may be interlocked by gears or the like.

Next, a second embodiment of the present invention will be described based on FIGS. 5 and 6.

In this embodiment, a plate-shaped air volume control valve body 81 that opens and closes the portion of the communication port 30 facing the ventilation path 55 is supported so as to be slidable in the left and right directions along the front surface of the front and rear partition walls 21 and the communication port 30. ing. That is, the side surface formed on the left side of the valve body 81 in FIG. At the same time, by the partition wall 21 of the lower case member 15 and the partition wall 21 of the upper case member 16,
It is held in such a way that it can move freely. Further, in the center part of the valve body 81, there is an inclined groove 8 which is inclined upward to the right when viewed from the front.
3 is formed. On the other hand, a rod-shaped arm body 84 is attached to the left support shaft 45 of the rotation tube 42 of the connecting tube 41 in FIG.
The rear end portion of the arm body 84 is fixed, and the front end portion of the arm body 84 located in the interlocking mechanism chamber 26 is inserted into the inclined groove of the valve body 81 through a notch 85 formed in the front and rear partition wall 21. 83. The length and angle of inclination of this inclined groove 83 are such that when the connecting pipe 41 rotates from the maximum elevation angle to the minimum elevation angle, the valve body 81
It is set to move 1W in the left and right direction by the width in the left and right direction of the portion facing the I circuit 55 of 0, that is, the stroke A shown in FIG.

Then, when the suction port main body 11 is grounded, the sixth
As shown by the solid line in the figure, since the angle of elevation of the connecting pipe 41 is increased, the valve body 81 can be inserted into the ventilation passage 55 of the communication port 30.
Therefore, the part facing the turbine 51 is closed.
is rotated by the suction airflow.

On the other hand, when the suction port main body 11 is separated from the surface to be cleaned, the connecting pipe 4
As the suction port main body 11 rotates downward under its own weight with respect to 1, the front end of the arm body 84 that rotates integrally with the connecting pipe 41 moves toward the valve body, as shown by the chain line in FIG. 81, the valve body 81 slides to the right in FIG. 6, the portion of the communication port 30 facing the ventilation passage 55 is opened, and the turbine 51 is stopped.

In both of the above embodiments, the valve body 71.81 opens and closes only the portion of the communication port 30 that does not face the turbine 51 in conjunction with the rotation of the connecting pipe 41, that is, the effective opening of the entire communication port 30 is Although the area is changed, the effective opening area of the entire communication port 30 is always constant, and as the connecting pipe 41 rotates, the actual frontage of the communication port 30 changes to the turbine 51.
The structure may be such that it moves between a position facing and a position not facing. To do this, for example, the second
In the embodiment, the valve body 81 has a size that covers the entire communication port 30, and an opening is provided in the valve body 81, and this opening is linked to changes in the elevation angle of the connecting pipe 41.
The valve body 8 is moved between a position facing the turbine 51 and a position not facing the turbine 51, that is, a position facing the ventilation passage 55.
What is necessary is to set the inclination angle of the first inclined groove 83.

〔Effect of the invention〕

According to the present invention, when the elevation angle of the connecting pipe, which is supported at the rear of the suction port so as to be vertically rotatable, with respect to the suction port main body becomes large, the portion of the communication port that communicates with the suction port that does not face the turbine When the opening area of the air inlet becomes smaller and the elevation angle of the connecting pipe becomes smaller, the opening area of the part of the communication port that does not face the turbine becomes larger, so the wind foot blowing on the turbine is controlled as the suction port body is raised and lowered. When the suction port body touches the ground, the rotating brush rotates, but when the suction port body is separated from the surface to be cleaned, the amount of air blown to the turbine decreases, causing the rotation of the turbine and rotating brush to slow down or stop. By doing so, noise can be prevented. In addition, the air volume control valve body changes the opening state of the communication port between the rotating brush chamber in the suction port body and the turbine chamber, so it opens and closes the opening provided on the outer surface of the suction port body facing the turbine chamber. Unlike the case where the

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the suction port body for a vacuum cleaner according to the present invention, with the upper case member and lid removed;
FIG. 2 is a cross-sectional view of the same as above, FIG. 3 is an exploded perspective view of the air volume control valve body part of the above, FIG. 4 is a perspective view of the entire same as above, and FIG. 5 is an upper case member and a FIG. 6 is a perspective view with the lid removed, and FIG. 6 is an enlarged perspective view of the air volume control valve body portion of the same. 11... Suction port body, 25... Rotating brush chamber, 27...
Turbine chamber, 30...Communication port, 31...Suction port, 41...
- Connecting pipe, 45... Support shaft of this connecting pipe, 51... Turbine, 61... Rotating brush, 71... Air volume control valve body, 73
...Pulley that also serves as the support shaft of this valve body, 81...Air volume control valve body, 83...Slanted groove, 84...Arm body.

Claims (3)

[Claims] (1) A suction port body with a rotating brush chamber provided on the front side of the interior, a turbine chamber communicating with the rotating brush chamber via a communication port provided on the rear side of the interior, and a suction port provided on the bottom facing the rotating brush chamber. a rotary brush rotatably supported in a rotary brush chamber of the suction port body; and a rotary brush rotatably supported in a turbine chamber of the suction port body facing a part of the communication port, and a suction airflow from the communication port. a turbine that is rotated by a turbine to rotationally drive the rotary brush; and a connecting pipe that is supported at a rear part of the suction port body so as to be vertically rotatable facing the turbine chamber, and the connection pipe is provided in the suction port main body so as to be vertically rotatable. When the elevation angle of this connecting pipe with respect to the suction port main body increases, the opening area of the portion of the communicating port that does not face the turbine is reduced, and when the elevation angle of the connecting pipe becomes small, the communication A suction mouth body for a vacuum cleaner, characterized in that it is provided with an air volume control valve body that increases the opening area of a portion of the mouth that does not face the turbine. (2) The air volume control valve body is rotatably supported by a support shaft, and the support shaft of the air volume control valve body and the support shaft of the connecting pipe are interlocked to control the rotation range of the air volume control valve body as described above. When the elevation angle of the connecting pipe reaches a maximum, the air volume control valve body becomes approximately parallel to the communication port, and when the elevation angle of the connecting pipe becomes a minimum, the air volume control valve body becomes approximately perpendicular to the communication port. The suction port body for a vacuum cleaner according to claim 1, characterized in that the suction port body has a range of 90°. (3) The air volume control valve body is supported so as to be slidable left and right along the communication port, and an arm body fixed to the connecting pipe is attached to the air volume control valve body in a sliding direction of the air volume control valve body. The vacuum cleaner suction according to claim 1, characterized in that the connecting pipe and the air volume control valve body are interlocked by being slidably engaged with an inclined groove provided at an angle. Mouth body.