JPH06327591A - Intake port body for vacuum cleaner - Google Patents

Abstract

PURPOSE:To ensure the stoppage of a rotor laid in an intake port body in a condition where the body is kept away from the surface of a cleaning object. CONSTITUTION:A rotary blade is journalled to the inside of the intake chamber of an intake port body 11 in such a way as freely rotatable, and driven to rotate on the operation of an electric motor. The first and second sensors 41 and 42 are connected to power line of the electric motor in series. The first sensor 41 acts to isolate the power line, when the body 11 is kept away from a floor 20. On the other hand, the second sensor 42 isolates the power line, when the posture of the body 11 is reversed. As a result, even when the body 11 is reversed with the first sensor 41 held and pushed, the stoppage of the electric motor can be ensured on the operation of the second sensor 42.

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 rotating body which is rotationally driven.

[0002]

2. Description of the Related Art Conventionally, for example, a suction port body of an electric vacuum cleaner shown in FIG. 4 is known. This suction mouth is the lower case
It has a horizontally long suction port body 1 formed by combining 1a and an upper case 1b, and a suction port (not shown) is formed on the lower surface of the front side of the suction port body 1. Also, this suction port body 1
Is equipped with an electric motor (not shown), and the electric motor drives a rotary member (not shown) such as a rotary cleaning member or a drive wheel to rotate while being exposed to the lower side of the suction port body 1. There is.

Further, such a rotary cleaning body and a rotary body such as a drive wheel do not need to operate when the suction port body is separated from the surface 3 to be cleaned, and the rotary body is stopped in terms of safety. Is desirable.

Therefore, the suction port body is provided with a detection device 5 for stopping the driving of the electric motor and stopping the rotating body in a state where the suction port body is separated from the surface 3 to be cleaned. This detection device 5 includes a roller support 6 rotatably supported by a shaft 6a provided at a rear end thereof by a predetermined angle, and a sensor roller 7 rotatably supported by a lower front portion of the roller support 6. And have.

Further, the detection device 5 is provided with a switch 8 connected in series to the power source line of the electric motor, and the operation piece 8a of the switch 8 is pushed upward against the biasing force, The power line of the electric motor is connected.

Further, a pushing piece 6b facing the lower side of the operating piece 8a is provided on the front side portion of the roller support 6 so that the suction port body 1 is placed on the surface 3 to be cleaned. , The sensor roller 7 contacts the surface to be cleaned 3 to rotate the roller support 6 upward, and the pushing piece 6b of the roller support 6 causes the switch 8 to move.
The operation piece 8a is pushed to connect the power supply line, and the electric motor can be driven. When the suction port body 1 is separated from the surface 3 to be cleaned, the sensor roller 7 is separated from the surface 3 to be cleaned, the roller support 6 is rotated downward, and the operation piece 8a of the switch 8 is urged by the urging force. It descends and cuts off the power supply line so that the electric motor cannot be driven.

However, in such a structure, for example, even when the lower surface of the suction port body 1 is turned upside down and the sensor roller 7 is pushed by an operator or the like, the power line is connected. , The electric motor can be driven. Therefore, in this detection device 5, the slope 9 which is inclined downward toward the rear side is provided above the roller support body 6.
In addition to the above, a weight body 10 made of an iron ball or the like is arranged on the slope 9. Therefore, in a normal state in which the lower surface of the suction port body 1 faces downward, the weight body 10 is located in the vicinity of the shaft portion 6a of the roller support body 6, so that the roller support body 6 can be rotated up and down. When the mouth body 1 is inverted, the weight body
10 moves to the vicinity of the pushing piece 6b and is sandwiched in the inclined path 9 to hold the roller support 6 in a state in which it cannot be pushed, that is, in a state in which the power supply line is cut off.

[0008]

However, in the above conventional structure, for example, in a normal state in which the lower surface of the suction port body 1 faces downward, the operator grasps the suction port body 1 and pushes the roller support body 6. When the suction port main body 1 is reversed while moving in this state, the weight body 10 passes through the inclined path 9 and pushes the pushing piece 6b.
There is a problem that the motor cannot be moved to the vicinity and the electric motor can be driven, so that the rotation of the rotating body cannot be reliably stopped.

The present invention has been made in view of the above points, and in a state where the suction port main body is separated from the surface to be cleaned,
An object of the present invention is to provide a suction port body of an electric vacuum cleaner that can more reliably stop the rotating body.

[0010]

A suction port body for an electric vacuum cleaner according to the present invention comprises a suction port body having a suction port facing the surface to be cleaned, the suction port body being opened on the lower surface, and a rotating body rotationally driven by an electric motor. The suction port body of the vacuum cleaner includes first and second sensors that turn on and off the electric motor, respectively, and the first sensor is in a state in which the suction port body is separated from the surface to be cleaned by a predetermined distance. To stop the electric motor,
The second sensor stops the electric motor in a state where the suction port body is inclined by a predetermined angle.

[0011]

In the suction port body of the electric vacuum cleaner according to the present invention, the first sensor for stopping the electric motor when the suction port body is separated from the surface to be cleaned by the predetermined distance and the electric motor when the suction port body is inclined by the predetermined angle are provided. And a second sensor for stopping the motor, the electric motor can be driven only when the suction port body is placed on the surface to be cleaned and the inclination of the suction port body is within a predetermined angle. The rotating body is rotated by the electric motor.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of the suction port of the vacuum cleaner of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 11 denotes a suction port main body which is elongated in the traveling direction. The suction port main body 11 is a lower main body case 12 and an upper portion which is fixedly coupled onto the lower main body case 12. It is composed of a body case 13.

The suction port body 11 has a horizontally elongated suction chamber 15 defined on the front side which is the traveling direction side, and communicates with the suction chamber 15 at the center of the rear side of the suction chamber 15. The air duct chamber 16 is partitioned and formed. Also, this air course
An electric motor chamber 17 is formed on one side of the control chamber 16, and a control chamber 18 is formed on the other side of the air duct chamber 16.

A suction port 21 is formed below the suction chamber 15 so as to face the floor surface 20 as the surface to be cleaned.

Further, a communication pipe is provided at the center of the rear part of the suction port body 11.
A rotary shaft 24 is mounted on the rotary shaft 24 so as to be rotatable at a predetermined vertical angle. The front end portion of the communication pipe 23 is the air duct chamber 16
Is rotatably fitted inside and faces the substantially central portion of the suction chamber 15, and communicates with the suction chamber 15 via an air passage chamber 16.

On the other hand, the rear end portion of the communication pipe 23 has a suction port body 11
To the rear side outward, and the front end of the bent connecting pipe 25 is rotatably fitted to this rear end. This connecting pipe
25 is detachably connected to the hose via an extension pipe (not shown) and further connected to the cleaner body. The suction chamber 15 communicates with the dust collecting chamber of the cleaner body (not shown) via the air passage chamber 16, the communication pipe 23, the connecting pipe 25, the extension pipe, the hose and the like.

Further, between the air duct chamber 16 and the electric motor chamber 17, and between the air duct chamber 16 and the control chamber 18, a driven rear wheel chamber 27 formed in a concave shape so as to open rearward, 27 are formed in the driven rear wheel chambers 27, 27, respectively.
8 and 28 are rotatably supported.

On the other hand, in the vicinity of both front end portions of the suction chamber 15,
The driven front wheel chambers 29, 29 are formed, and these driven front wheel chambers 29, 29 are formed.
Driven front wheels (not shown) are rotatably supported by 29, respectively.

Then, with the suction inlet main body 11 placed on the floor surface 20, these driven rear wheels 28, 28 and the driven front wheels abut on the floor surface 20 to move the suction inlet main body 11 in the front-rear direction. It is designed to support freely.

Further, in the suction chamber 15, a rotary blade 31 as a rotating body is rotatably supported. The rotary blade 31 is made of an elastic material such as rubber and has a twisted plate-shaped blade on the outer peripheral portion. The lower end portion of this blade is supported in a state of protruding downward from the suction port 21 so as to efficiently scrape out dust and the like in the carpet.

On the other hand, an electric motor 33 is housed in the electric motor chamber 17, and a rotary shaft 33a of the electric motor 33 is connected to the rotary blade 31 by a belt or a gear not shown. Then, by supplying electric power to the electric motor 33 through the power supply line 35 shown in FIG.
33a is rotationally driven, and the rotary blade 31 is rotationally driven.

In the control room 18, a first sensor 41 and
The second sensor 42 and the like are stored.

The first sensor 41 has a roller support body 44 which is supported by a shaft portion 44a provided at the rear end portion thereof so as to be rotatable in the vertical direction by a predetermined angle. A sensor roller 45 is rotatably supported on the lower part of the front side of the roller support body 44 so as to be rotatable in the front-rear direction. Also, the roller support 44
Is urged downward, and with the suction port body 11 separated from above the floor surface 20, the roller support body 44 rotates downward and the sensor roller 45 moves below the driven rear wheel 28 and the driven front wheel. With the suction port main body 11 mounted on the floor surface 20, the sensor roller 45 abuts on the floor surface 20 and the roller support body 44 is rotated upward.

A first switch 46 is provided above the front side of the roller support 44. This first
The switch 46 is a so-called micro switch,
33 is connected in series to the power line 35. Below the first switch 46, the operation piece 46 urged downward is provided.
The power supply line 35 is connected so that the power supply line 35 is cut off in a natural state and the operation piece 46a is pushed upward against the biasing force in a natural state.

Further, on the front upper part of the roller support 44,
A pusher piece 44b facing the lower side of the operation piece 46a is provided, and the pusher piece 44b of the roller support 44 is placed on the floor surface 20 with the pusher piece 44b of the roller support 44 placed on the first switch 46a. Operation piece 46a
Is pressed to connect the power supply line 35, and the electric motor 33 can be driven. Further, when the suction port body 11 is separated from the floor surface 20 and the sensor roller 45 is separated from the floor surface 20, the roller support body 44 is rotated downward by its own weight,
The operation piece 46a of the first switch 46 is lowered by the urging force to cut off the power supply line 35, thereby making the electric motor 33 inoperable.

On the other hand, the second sensor 42 has a pair of opposite side ribs 51, 51 having a substantially U-shaped cross section, and a guide inclined upward toward the front side between the ribs 51, 51. A path 52 is formed. A weight body 53 made of, for example, an iron ball is housed in the guide path 52 so as to be vertically movable by its own weight.

Further, the second sensor 42 has a guide path.
A second switch 55 is provided along the line 52. The second switch 55, like the first switch 46, is connected in series to the power supply line 35 of the electric motor 33. Then, from the second switch 55, an operation piece 55a protruding to the inner lower part of the guide path 52 is provided so as to cut off the power supply line 35 in a natural state, and the operation piece 55a resists the urging force. The power line 35 is connected in the pushed state.

Then, in a normal state in which the lower surface of the suction port body 11 is directed downward, the weight body 53 descends in the guide path 52 and pushes the operation piece 55a of the second switch 55 to connect the power line 35. By connecting them, the electric motor 33 can be driven. Further, in a state where the suction port body 11 is inclined from the normal state by a predetermined angle or more, such as a state in which the suction port body 11 is turned upside down, the weight body 53 moves in the guide path 52 and the second switch 55. Away from the operation piece 55a. Then, the operation piece 55a
The urging force causes the electric power line 35 to be cut off by projecting into the guide path 52, so that the electric motor 33 cannot be driven.

A power line 35 for supplying electric power to the electric motor 33.
As described above, the first switch 46 and the second switch 55 are connected in series as described above, and the fuse 58 is connected in series. Furthermore, this power line 35 is a communication pipe.
23, a connecting pipe 25, an extension pipe, a hose, etc., and is connected to a control unit and a power supply unit of the cleaner body (not shown).

Next, the operation of this embodiment will be described.

At the time of cleaning, the suction port body 11 is connected to a cleaner body (not shown) via an extension pipe and a hose.
Next, the end portion of the hose on the extension pipe side is gripped and pushed to move the suction port body 11 back and forth while contacting the floor surface 20.

In such a normal use state,
Both the first switch 46 and the second switch 55 become conductive, and electric power can be supplied to the electric motor 33. Therefore, by operating an operation switch (not shown), the rotary blade 31 is rotationally driven and dust is efficiently scraped off. In this way, the dust sucked from the floor surface 20 into the suction chamber 15 through the suction port 21 becomes the air duct chamber 16 and the communication pipe 2.
It is introduced into the dust collecting chamber of the cleaner body through the connecting pipe 25 and the hose.

Further, the operator lifts the suction port main body 11,
When the suction port body 11 is separated from the floor surface 20,
The first switch 46 of the first sensor 41 cuts off the power line 35, and the electric power is not supplied to the electric motor 33.
The rotating blade 31 is stopped even if the operating blade 31 is operated.

Further, when foreign matter is blocked in the suction port 21 during cleaning, when the operator lifts the suction port body 11 and reverses it so that the lower surface faces upward, the first sensor 41 The first switch 46 cuts off the power supply line 35, and the second switch 55 of the second sensor 42 cuts off the power supply line 35. Therefore, even if the rotating blade 31 is operated to operate, even if the sensor roller 45 of the first sensor 41 is pushed, electric power is not supplied to the electric motor 33 and the rotating blade 31 is stopped. Retained.

As described above, according to the suction port body of this embodiment, the power supply line 35 is provided with the suction port body 11 separated from the floor surface 20.
And a second sensor 42 for shutting off the power supply line 35 in a state where the suction port main body 11 is inclined at a predetermined angle, are provided so as to operate independently of each other.
Since these sensors 41, 42 are connected in series to the power supply line 35 of the electric motor 33, the suction port body 11 is placed on the floor surface 20 and the inclination of the suction port body 11 is within a predetermined angle. Only the electric motor 33 can be driven, and the rotating blade 31 is rotationally driven by the electric motor 33.

So, for example, if a child plays a trick,
Even if the suction port main body 11 is turned over while the sensor roller 45 of the first sensor 41 is gripped, the second
Since the sensor 42 cuts off the power supply line 35, the rotating blade 31 can be stopped reliably.

In the above embodiment, the rotating blade 31 is used as the rotating body, but a rotating body exposed to the lower surface of the suction port body 11 and driven to rotate, such as a rotating brush or a running wheel, The same effect can be obtained.

Further, in the above embodiment, the suction port body 11 is constructed separately from the vacuum cleaner body.
11 can also be configured integrally with the vacuum cleaner body.

[0040]

According to the suction port body of the vacuum cleaner of the present invention, the electric motor is operated only when the suction port body is placed on the surface to be cleaned and the inclination of the suction port body is within a predetermined angle. It becomes drivable, and the rotating body is rotated by this electric motor. Therefore, the rotating body can be more reliably stopped in the state where the suction port body is separated from the surface to be cleaned.

[Brief description of drawings]

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

FIG. 2 is a plan view showing a state in which an upper case of the suction inlet body is removed, as in the above.

FIG. 3 is a circuit diagram of the suction port body of the above.

FIG. 4 is a partial cross-sectional view showing a suction port body of a conventional electric vacuum cleaner.

[Explanation of symbols]

 11 Suction port main body 20 Floor surface as a surface to be cleaned 21 Suction port 31 Rotating blade as a rotating body 33 Electric motor 41 First sensor 42 Second sensor

Claims (1)

[Claims] 1. A suction port body of an electric vacuum cleaner, comprising: a suction port body having a suction port facing the surface to be cleaned, the suction port body being opened on the lower surface; and a rotating body rotatably driven by the electric motor. A first and a second sensor that are turned off are provided, the first sensor stops the electric motor in a state where the suction port body is separated from the surface to be cleaned by a predetermined distance, and the second sensor is the suction sensor. A suction mouth of an electric vacuum cleaner, wherein the electric motor is stopped in a state where the mouth main body is inclined at a predetermined angle.