JP2693872B2 - Vacuum cleaner suction body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction port body of an electric vacuum cleaner having a suction port body provided with a rotary cleaning body and drive wheels.

[0002]

2. Description of the Related Art Conventionally, as a suction port body of such an electric vacuum cleaner, one described in Japanese Patent Application Laid-Open No. 2-7923 is known.

The suction port body drives a first drive motor for rotating the drive wheel in a direction that assists the movement of the suction port body, and an agitator, which is a rotary cleaning body, for rotating in a direction opposite to the rotation of the drive wheel. A second drive motor is provided. The rotation direction of the first and second drive motors is switched by the changeover switch that detects the moving direction of the suction port body. By switching the changeover switch, the drive wheel is rotated so as to always assist the movement of the suction port body even when the suction port body is frequently moved forward and backward, and the agitator is moved in the direction opposite to the drive wheel, that is, the suction port body. It is rotated in a direction opposite to the moving direction of. The reason why the agitator is rotated in the direction opposite to the moving direction of the suction port body is to enhance the scraping effect of dust.

[0004]

However, in the conventional suction port body, since the two drive motors are provided, there is a problem that the weight of the suction port body becomes large and the size becomes large.

The present invention has been made in view of the above problems, and an object thereof is to rotate a drive wheel and a rotary cleaning member in a direction opposite to the drive wheel with a single drive motor and a simple structure. Thus, it is an object of the present invention to provide a suction port body of an electric vacuum cleaner that can be made compact and lightweight.

[0006]

In order to achieve the above object, the present invention provides a rotary cleaning body for scraping up dust on a surface to be cleaned in a suction chamber having an opening for sucking dust on the lower surface of a suction port body. A suction port body of an electric vacuum cleaner that is rotatably arranged, has a drive wheel for assisting the movement of the suction port body on the lower surface of the suction port body, and has a rotary cleaning body and a drive motor for rotating the drive wheel. A drive pulley is provided on the output shaft of the drive motor, driven pulleys are respectively provided on the rotary cleaning body and the rotary shaft of the drive wheel, and a transmission belt is wound around the drive pulley and one of the driven pulleys. Another driven pulley is brought into contact with the outer peripheral surface of the transmission belt to rotate the rotary cleaning body and the drive wheel in mutually opposite directions.

[0007]

According to the present invention, the transmission belt is wound around the driven pulley provided on the rotary cleaning body or the rotary shaft of the drive wheel and the drive pulley provided on the output shaft, and another driven pulley is provided on the outer peripheral surface of the transmission belt. Since they are in contact with each other, the drive wheel and the rotary cleaning body rotate in mutually opposite directions.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the suction port body of the vacuum cleaner according to the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3, reference numeral 11 designates a suction port body 10.
The main body case that constitutes the suction port main body, which is composed of a lower main body case 12 and an upper main body case 13 coupled to the lower main body case 12. Reference numeral 70 denotes an intermediate case installed between the lower body case 12 and the upper body case 13.

In the main body case 11, a horizontally long suction chamber 16 is formed on the front side, and the motor chamber 17 and the air duct chamber are formed.
And 18 are formed on one side of the rear portion. A suction port 20 for sucking dust is opened on the lower surface of the suction chamber 16.
The air duct chamber 18 is formed by the middle case 70.

At the center of the rear part of the body case 11, a communication pipe 21 is supported by a rotating shaft 22 so as to be vertically rotatable by a predetermined angle, and the communication pipe 21 and the air passage chamber 18 of the middle case 70 are communicated with each other. The communication pipe 21 and the suction chamber 16 communicate with each other via the air passage chamber 18. A connection pipe 25 is rotatably fitted to the rear end of the communication pipe 21, and the connection pipe 25 is communicated with a dust collecting chamber of a cleaner body (not shown) via an extension pipe or the like not shown. It is like this.

In the suction chamber 16 of the suction port body 11, a rotary cleaning member 31 which is a rotary brush is rotatably supported by a bearing 32. Further, in the suction port body 11, two drive wheel chambers 50 are formed at the rear of the suction chamber 16 and at positions sandwiching the air passage chamber 18. The drive wheel chamber 50 has an opening on the suction chamber side.
49 is formed, and the drive wheel chamber 50 and the suction chamber 16 communicate with each other through the opening 49.

A drive wheel 51 is arranged in each of the drive wheel chambers 50, and a rotary shaft 34 of the drive wheel 51 has a side wall 52 of the drive wheel chamber 50.
It is provided by inserting ~ 55. The rotating shaft 34 is rotatably held by bearings (not shown) provided on the side walls 52 to 55,
The drive wheel 51 rotates integrally with the rotation of the rotary shaft 34. The drive wheel 51, as shown in FIG.
Projects downward from an opening 35 opened on the lower surface of the. As shown in FIG. 1, the lowest point 51a of the drive wheel 51 is set to be above the line 59 connecting the lowest points of the front and rear rollers 57, 58 and below the lower surface 12a of the lower body case 12. When the surface to be cleaned is the floor, the drive wheels 51 do not come into contact with the floor.

A motor 36 for rotating the rotary cleaning body 31 is provided in the electric motor chamber 17. From the lower side of the drive pulley 38 fixed to the output shaft 37 of the motor 36 to the lower side of the tension roller 39, the upper side of the driven pulley 41 provided on the rotary shaft 34, and the driven shaft fixed to the rotary shaft 31a of the rotary cleaning body 31. pulley
Drive pulley 38 from the upper side of pulley 42 via the lower side of 42
The transmission belt 43 for power transmission is stretched over the upper part of the, and the cleaning target body 31 and the drive wheels 51 are rotated by the rotation of the output shaft 37. The rotation direction of the drive wheel 51 and the rotation direction of the rotary cleaning body 31 are opposite to each other.

As shown in FIG. 4, teeth 45 are formed on the inner peripheral surface 43a of the transmission belt 43, and the teeth 45 are formed on the peripheral surface of the pulley 38 of the output shaft 37 (not shown). And a rotating cleaning body
By meshing with teeth 42a formed on the peripheral surface of the driven pulley 42 of 31, the rotational drive of the output shaft 37 is reliably transmitted to the rotary cleaning body 31. Further, the outer peripheral surface 43b of the belt 43 is formed in a flat shape so that when the drive wheel 51 is locked, the transmission belt 43 does not slip on the peripheral surface of the pulley 41 and the motor 36 is not overloaded. Concavities and convexities (not shown) are formed on the peripheral surface 41a of the driven pulley 41 so that a predetermined frictional force is obtained by contact with the outer peripheral surface 43b of the transmission belt 43, and the frictional force causes the driven pulley 41 to rotate. To do.

Further, as shown in FIG. 5, the main body case 11 is provided with a micro switch 56 having a switching lever 57 which extends downward and contacts the surface to be cleaned. When the suction port body 10 moves forward (in the direction of arrow P), the switching lever 57
The switching lever 57 is moved to the solid line position by the surface to be cleaned,
When the suction port body 10 retracts, the switching lever 57 is moved to the broken line position. When the switching lever 57 moves to the solid line position, the output shaft 37 of the motor 36 rotates in the arrow Q direction, and when it moves to the broken line position, it rotates in the arrow R direction. That is, the rotary sweeper 31 is rotated in a direction that obstructs the moving direction of the suction port body 10 to improve the scraping effect of dust, and the drive wheel 51 is in the same direction as the moving direction of the suction port body 10. It is rotated to assist the movement of the suction port body 10.

Next, the operation of the suction port body of the above embodiment will be described.

First, a main switch (not shown) is turned on. Then, the dust collection chamber of the electric vacuum cleaner body (not shown) is set to a negative pressure to suck the dust from the suction port 20 of the suction port body 10 via a hose, an extension pipe and the like (not shown). When the motor 36 is driven and the suction port body 10 is moved forward, the switching lever 57 moves to the position indicated by the solid line, which causes the output shaft 37 of the motor 36 to rotate in the arrow Q direction. The rotation of the output shaft 37 is transmitted to the pulleys 41 and 42 via the transmission belt 43, and the rotary cleaning body 31 and the drive wheel 51 rotate.

The rotary cleaning body 31 rotates in the direction of the arrow S which hinders the forward movement of the suction port body 10 to efficiently scrape up dust and the like adhering to the carpet or the like.

On the other hand, the drive wheel 51 rotates in the direction of arrow T, which is the same direction as the movement of the suction port body 10. At this time, since the drive wheel chamber 50 and the suction port 20 communicate with each other, the carpet or the like is also sucked into the opening 35 of the drive wheel chamber 50, and the drive wheel 51 comes into contact with the carpet with certainty. Suction port body 10 by rotation of 51
Will be assisted in the forward movement.

Next, when the suction port body 10 is retracted, the switching lever 57 moves to the position indicated by the broken line, which causes the output shaft 37 of the motor 36 to rotate in the direction of arrow R, and vice versa. 51 rotates in the direction of arrow F to assist the backward movement of the suction port body 10. The rotary cleaning body 31 rotates in the direction of arrow G, which is the opposite direction to the backward movement of the suction port body 10, and efficiently scrapes up dust and the like adhering to the carpet or the like.

As described above, since the rotary cleaning body 31 and the drive wheel 51 are rotated in the opposite directions by the one drive motor 36 and the transmission belt 43, the weight thereof is light and the The structure is simple.
Therefore, the size and weight can be reduced.

By the way, when cleaning the floor, the drive motor
In this case, the drive wheel 51 does not contact the floor, so that the suction port body 10 can be freely moved in the front-rear direction without providing a clutch or the like to set the drive wheel 51 in a free state. It can be moved (the drive motor 36 is deactivated so that the rotary cleaning body 31 does not need to be rotated and the rotation cleaning body 31 does not damage the floor).

[0024]

As described above, according to the present invention, since the rotary cleaning body and the drive wheels are rotated in the opposite directions by one drive motor and the transmission belt, the weight thereof is light. Moreover, the structure is simple, and the size and weight can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a drive mechanism of a suction port body according to the present invention,

FIG. 2 is a plan view schematically showing an internal configuration of a suction port body,

FIG. 3 is a cross-sectional view showing a state of communication between the suction port of the suction port body and the drive wheel chamber,

FIG. 4 is a side view showing teeth provided on a transmission belt and teeth provided on a pulley;

FIG. 5 is a cross-sectional view for explaining switching of micro switches.

[Explanation of symbols]

 11 Suction port body 16 Suction chamber 31 Rotating cleaning body 34 Rotating shaft 36 Drive motor 37 Output shaft 38 Drive pulley 41,42 Driven pulley 43 Drive belt 51 Drive wheel

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuhei Omoto 43 Horiyamashita, Hadano City, Kanagawa Prefecture Tokyo Electric Co., Ltd. Hadano Plant (56) Reference JP-A-3-29 (JP, A) JP Japanese Patent Application Laid-Open No. 4-193137 (JP, A) Japanese Patent Application Laid-Open No. 3-28 (JP, A) Japanese Patent Application Laid-Open No. 2-144030 (JP, A) Japanese Patent Application Laid-Open No. 49-43456 (JP, A) Japanese Patent Application Laid-Open No. 63-97127 (JP , A) Actual Kaihei 4-83153 (JP, U)

Claims (2)

(57) [Claims] 1. A rotary cleaning body for scraping up dust on a surface to be cleaned is rotatably arranged in a suction chamber having an opening for sucking dust on the lower surface of the suction port body, and the suction is provided on the lower surface of the suction port body. A suction wheel of a vacuum cleaner provided with a drive wheel for assisting the movement of the mouth main body, and provided with a drive motor for rotationally driving the rotary cleaning body and the drive wheel, wherein a drive pulley is provided on an output shaft of the drive motor. A rotary pulley of the rotary cleaning body and a rotary shaft of the drive wheel are provided respectively, and a transmission belt is wound around the drive pulley and one of the driven pulleys, and another driven pulley is applied to the outer peripheral surface of the transmission belt. The suction port body of the vacuum cleaner, wherein the rotary cleaning body and the drive wheel are rotated in opposite directions by contacting with each other. 2. A driven pulley of the drive wheel, wherein teeth are formed on the drive pulley and a driven pulley of the rotary cleaning body, and teeth meshing with these teeth are formed on an inner peripheral surface of the transmission belt. The suction port body of the electric vacuum cleaner according to claim 1, wherein the outer peripheral surface of the transmission belt with which the abutment is formed is flat.