JPH07308276A - Suction port of vacuum cleaner - Google Patents

Abstract

PURPOSE:To prevent deformation of a lower case during cleaning by improving the strength of a central part (connecting path part) of the lower case by a passage cover, and to protect coupling parts from refuse passing through the connecting path without increasing a draft resistance of the connecting path and without a separate protective member. CONSTITUTION:A rotary brush chamber 14 where a rotary brush 2 is disposed is provided in the front part of a lower case 6 of a suction port main body 1, a connecting path 15 communicated with the rotary brush chamber 14 is provided in the center of the rear part of the lower case 6, a motor chamber 18 where a motor 3 is disposed is provided on one of both sides of the connecting path 15, a storing chamber 19 for storing parts for supplying power to the motor 3 is provided on the other side, a passage cover 43 is laid on the rotary brush chamber 14 side of the connecting path 15, and a resistor 40 is disposed in a recessed part provided on the upper part of the passage cover 43.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a lower case and an upper case which are joined together to form a suction port body, and a rotary brush chamber having a dust suction opening on the lower surface is provided at the front of the lower case. The present invention relates to a suction port of an electric vacuum cleaner in which a communication path communicating with the rotating brush chamber is provided in the center of the rear part of the case.

[0002]

2. Description of the Related Art In this type of suction port, a lower case and an upper case are joined together to form a suction port body, and a rotary brush having a dust suction opening portion on the lower surface is disposed in the front portion of the lower case. A rotary brush chamber is provided, a communication path communicating with the rotary brush chamber is provided in the center of the rear part of the lower case, an electric motor chamber is provided with an electric motor on one of both sides of the communication path, and the other is provided with a power supply to the electric motor. A storage chamber is provided for storing the components for supplying the components, and a drive pipe is rotatably supported on the communication path by a rotation shaft. The rotating brush is rotated by the electric motor to remove dust from the carpet. The carpet can be effectively cleaned by effectively scraping it out.

[0003]

However, at the suction port, the lower case has only the bottom surface at the central portion of the lower case, that is, the connecting path portion, and the strength of this portion is weak. This concentrated central portion is deformed, and due to this deformation, air is introduced from a portion other than the dust suction opening portion, and there is a problem that the dust suction efficiency is reduced.

Further, a rotary brush chamber having a dust absorption opening and a rotary brush is provided on the lower surface, and a communication passage communicating with the rotary brush chamber is provided at the center of the rear portion of the lower case. In the case where the electric motor room in which the electric motor is arranged is provided on one side, and the accommodation room for accommodating the parts for supplying the electric power to the above-mentioned electric motor is provided on the other side, there is always a communication path between the electric motor room and the accommodation room. Since it is located, the connecting component that connects the electric motor and the component of the storage chamber is located in the communication path. Since the dust sucked from the dust suction opening passes through the communication path, a separate cover for protecting the connecting parts was required to protect the connecting parts from the dust.

[0005]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems, and a lower case and an upper case are combined to form a suction port body, and a dust suction opening is formed on the lower surface at the front of the lower case. And a rotary brush chamber having a rotary brush disposed therein, a communication path communicating with the rotary brush chamber is provided at the rear center of the lower case, and an electric motor is provided on either side of the communication path. In addition to the above, the other side is provided with a storage chamber for storing the components for supplying power to the electric motor, and a passage cover is installed above the rotary brush chamber side of the communication path.
Connection parts for connecting the electric motor and the parts of the storage chamber are provided in a recess provided in the upper portion of the passage cover.

[0006]

With the above-described suction port, since the passage cover is installed above the communication passage, the strength of the central portion (communication passage portion) of the lower case can be improved and deformation during cleaning can be prevented. To prevent.

Further, since the connecting component is arranged on the passage cover provided above the connecting passage, the connecting component can be protected from dust passing through the connecting passage.

[0008]

Embodiments of the present invention shown in the drawings will be described in detail below.

The suction port main body 1 has an outer casing formed by an upper case 5, a lower case 6 and a cover 7, and is provided with a vertically rotatable drive pipe 8 at its rear end and a rotatable suction pipe 9 at its tip. Link.

The lower case 6 acts as a sled for a carpet, and has a horizontally long dust collecting opening 10 formed in the front portion of the lower surface thereof, and a rubber sealing material 1 behind the opening 10.
1 is arranged in the lateral direction. The lower case 6 is provided with rollers 12 on the front surface of the lower surface and wheels 13 on the rear surface so that a constant gap is formed between the lower surface of the lower case 6 and the floor surface by the rollers 12 and the wheels 13. Has become.

Inside the suction port body 1, the upper case 5 and the lower case 6 are connected to each other to form a rotary brush chamber 14 and the brush chamber 1.
4 is formed to communicate with the drive pipe 8 side, and the rotating brush chamber 14 and the communication passage 15 form a dust suction passage from the dust suction opening 10 to the drive pipe 8.
Further, mechanism chambers 16 and 17 are formed on both sides inside the suction port body 1, and inside the motor chamber 1 on both sides of the communication path 15.
8 and an outlet storage room 19 are formed, and each room 1
6 to 19 are appropriately partitioned with respect to the dust suction passage.

The opening 20 of the upper case 5 is formed in the rotary brush chamber 1.
This is for facilitating the removal of lint and the like that face the rotating brush 2 and are entangled in the rotating brush 2, and are normally closed by a removable cover 7.

The bumper 21 is sandwiched between the cases 5 and 6 and located on the outer periphery of the suction port body 1.
6 has a sealing effect on the connecting surface and a buffering effect against obstacles. The rotary brush 2 has a structure in which a beater 22 and brush bristles 23 are provided on the outer peripheral surface in a single or plural spiral shape. The rotary brush chamber 14 has a shaft 24 at both ends in the machine chamber 16,
It projects into 17 and is rotatably supported in the chambers 16 and 17 by a bearing assembly 25.

The bearing assembly 25 comprises a bearing 26, a bearing holder 27 and an elastic body 28 interposed therebetween.
It is held in the machine chambers 16 and 17 so as to be vertically movable. That is, the lower case 6 forming the machine rooms 16 and 17
A pair of ribs 29, 29 facing each other on one side are integrally formed, and the bearing assembly 25 is formed in the groove 30 between the ribs 29, 29.
Is positioned so that the assembly 25 can move up and down along the groove 30.

Therefore, the rotary brush 2 pivotally supported by such a bearing assembly 25 is also provided so as to be movable up and down, and the rotary brush 2 is normally located at the lowest position by its own weight and the action of the spring 31. The spring 31 is provided between the upper surface of the bearing 26 and the upper surface of the upper case 5 which are formed in parallel with each other and is perpendicular to the upper surface of the bearing 26.

Incidentally, the rotary brush chamber 14 and the machine chambers 16 and 17
An opening 32 is provided in the partition wall between which the end of the rotary brush 2 is inserted and which allows the vertical movement of the rotary brush 2.

The electric motor 3 is an AC magnet electric motor suitable for reducing the size and weight of the suction port. The electric motor 3 is installed in the electric motor room 18, and its rotary shaft 33 is projected into the machine room 16 so that the machine In the chamber 16, the transmission mechanism 4 is provided between the rotary brush 2 and one shaft 24 of the rotary brush 2.

The transmission mechanism 4 comprises a pulley 34 provided on the rotary shaft 33 of the electric motor 3, a gear pulley 35 provided on one shaft 24 of the rotary brush 2, and a timing belt 36 stretched between the pulleys 34, 35. , The rotation of the electric motor 3 is transmitted to the rotating brush 2.

The rotation direction of the electric motor 3 is set counterclockwise as viewed from the pulley 34 side so that the rotary brush 2 rotates in accordance with the traveling direction during cleaning.

The electric motor 3 is installed in the machine room 17.
The bearing assembly 37 that supports the free end side of the rotating shaft 33 through the pulley 34 is provided. The electric motor 3 has ventilation holes in the front and rear parts, and has a structure in which air can flow through the ventilation holes.

The inlet main body 1 has an outlet 38 housed in the outlet storage chamber 19 and its connecting surface is exposed to the outer surface. From the outlet 38, a positive temperature coefficient thermistor 39,
Electric power is supplied to the electric motor 3 via the resistor 40. The positive temperature coefficient thermistor 39 protects the electric motor 3 when the load current exceeds a certain value, the resistance value suddenly increases due to self-heating, and the electric motor 3 is stopped. Also, the resistor 40 is AC 1
It is a resistor for voltage drop for decompressing 00V and applying it to the electric motor 3.

In the figure, 41 is a capacitor for preventing radio interference,
42 is a full-wave rectifier built in the electric motor 3. The resistor 40 is held by a passage cover 43 provided across the upper part of the communication path 15, and the cover 43 accommodates the resistor 40 in a space defined by the communication path 15 and the resistor 40. The electric motor 3 in the electric motor room 18 and the outlet 38 in the electric outlet housing chamber 19 are connected via the. And
The passage cover 43 improves the strength of the central portion (the connecting passage 15 portion) of the lower case 6, prevents the lower case 6 from being deformed by the operating force applied through the drive pipe 8 during cleaning, and prevents the dust suction opening 10 from being deformed. The inflow of air from other parts is prevented to prevent the dust suction force from decreasing, and the resistor 40 is protected from dust passing through the communication path 15.

In FIG. 1, arrows indicate the flow of cooling air, and this flow will be described. This flow of the cooling air is generated by the operation of the electric blower in the main body of the vacuum cleaner described later, and outside air enters the electric motor chamber 18 from the air holes (not shown) also received in the upper case 5 near the electric motor 3. Entering, passing through the inside of the electric motor 3 and the resistor 40, the connecting path 15
It flows from a through hole (not shown) in the wall to the dust collecting passage, and cools the electric motor 3 and the resistor 40. Therefore, an inexpensive cement resistor or the like can be used as the resistor 40, and of course, the problem due to heat generation does not occur.

FIG. 5 is a view showing a use state of the suction port,
44 is a cleaner body, 45 is a suction hose, 46 is an extension tube,
Reference numeral 47 is a hand switch provided on the bent pipe portion 48 of the suction hose 45, 49 is an outlet provided on the bent pipe portion 48, 50 is a power cord connecting the outlets 38 and 49, and 51 is an alternating current provided on the cleaner body 44. An outlet for taking out 100V, and a power cord 52 for connecting to the outlet 51 and supplying power to the suction port body 1 side.

In the above structure, one end of the extension pipe 46 is connected to the suction pipe 9 of the suction port body 1, and the other end of the extension pipe 46 is connected to the cleaner body 44 via the suction hose 45.
With the power cord 50 connected to the outlet 38,
At 49, another power cord 52 is connected to the outlet 51 (see FIG. 5).

When the cord pulled out from the cleaner main body 44 is connected to the power outlet and the hand switch 47 is turned on the floor / tatami side, only the electric blower of the cleaner main body 44 is supplied with power to collect dust. Will be done.

When the hand switch 4 is turned on to the carpet side, AC 1 is also applied to the outlet 38 side together with the electric blower.
00V is applied. Then, the electric motor 3 is driven by being supplied with electric power through the resistor 40, and rotationally drives the rotary brush 2 via the transmission mechanism 4. In this state, the carpet cleaning can be effectively performed by the scraping action by the rotation of the rotary brush 2 and the suction action of the air flow flowing from the dust suction opening 10 through the rotary brush chamber 14 and the communication path 15 by the electric blower. .

Carpet cleaning is performed while moving the suction port body 1 onto the rug. At this time, the rotating brush 2 automatically adjusts the resistance received by the vertical movement to keep the load applied to the electric motor 3 small. Become. That is, when the carpet has a long bristle or is pressed strongly against the carpet surface, the rotating brush 2 receives a very large resistance. At this time, the bearing assembly 25 supporting the rotating brush 2 is placed in the groove 30. Since it can be moved up and down, the rotary brush 2 is retracted from the carpet surface by upward movement (moving diagonally upward in this embodiment) and automatically adjusted so that the resistance received is reduced.

As a result, the load applied to the electric motor 3 is suppressed to a low level, and the increase in load current is also suppressed. Therefore, even if an AC magnet electric motor is used as the electric motor 3, the carpet cleaning can be performed without any trouble in practical use.

When the rotating brush 2 is loaded with a large load that cannot be absorbed and the motor 3 is locked, an overload current will flow. At this time, the positive temperature coefficient thermistor 39 functions as a safety device. , Protect the electric motor 3.

[0031]

Since the suction port of the vacuum cleaner of the present invention has the passage cover installed on the upper part of the communication passage, the strength of the central portion (communication passage portion) of the lower case can be improved by the passage cover. Therefore, it is possible to prevent the lower case from being deformed during cleaning, prevent the inflow of air from a portion other than the dust suction opening, prevent the dust suction power from decreasing, and improve the dust suction efficiency of the suction port. In addition, since the connecting component is arranged on the passage cover that is installed above the connecting passage, a separate protective member is used for the connecting component from dust passing through the connecting passage without increasing the ventilation resistance of the connecting passage. Can be protected without.

[Brief description of drawings]

FIG. 1 is a plan view showing a suction port in an embodiment of the present invention and a part of which is shown in cross section except for an upper case.

FIG. 2 is a sectional view taken along the line AA ′ of FIG.

3 is a sectional view taken along line BB ′ of FIG.

FIG. 4 is an electric circuit diagram of the suction port of the present invention.

FIG. 5 is a diagram showing a usage state of the suction port of the present invention.

[Explanation of symbols]

 1 Suction Port Main Body 2 Rotating Brush 3 Electric Motor 8 Drive Pipe 9 Suction Pipe 10 Dust Collection Aperture 14 Rotating Brush Chamber 15 Connecting Path 18 Electric Motor Chamber 40 Resistor 43 Passage Cover

Claims (1)

[Claims] 1. A rotary brush chamber in which a lower case and an upper case are connected to each other to form a suction port body, and a rotary brush having a dust suction opening portion on a lower surface is provided in a front portion of the lower case. A communication path communicating with the rotary brush chamber is provided at the center of the rear part of the lower case, and an electric motor chamber having an electric motor is provided on one of both sides of the communication path, and a component for supplying power to the electric motor is provided on the other side. In the suction port of the electric vacuum cleaner having a storage chamber for storing, a passage cover is installed above the rotary brush chamber side of the communication passage, and the electric motor and the storage chamber are provided in a recess provided in the upper portion of the passage cover. A suction port of an electric vacuum cleaner, which is provided with a connecting part for connecting with the above part.