JPH0778B2 - Vacuum cleaner - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electric vacuum cleaner using an electric floor suction tool equipped with a rotary brush driving brush motor.

(B) Conventional technology In an electric vacuum cleaner, a connection pipe with a handle for connecting an extension tube to a flexible hose is provided with a power control mechanism for manually operating the output of an electric blower in the electric vacuum cleaner. The technique is disclosed in JP-A-61-68024.

An electric vacuum cleaner in which a power control mechanism of an electric blower is incorporated in a connecting pipe for connecting an extension pipe, and an electric floor suction tool and the electric blower are turned on and off with a single switch is also disclosed in JP-A-60-21730. It is shown.

However, the former does not show the relationship with the electric floor suction tool, and the latter does not show the specific circuit configuration, and particularly does not show the specific configuration of the power supply circuit at all.

(C) Problems to be Solved by the Invention In view of the above problems of the present invention, an electric blower in a cleaner body and a brush motor in an electric floor suction tool are connected to a flexible hose tip. In the remote control by the hand control unit provided on the pipe, the parts for controlling the electric blower and the brush motor are rationally arranged to simplify the wiring process between the cleaner body and the hand control unit. The weight of the connecting pipe having the hand control unit can be reduced so that it can be easily held during cleaning, and the usability can be improved.

(D) Means for Solving the Problems The present invention is directed to a cleaner main body having a dust collecting part and an electric blower built therein, a flexible hose having one end connected to the cleaner main body, and the above-mentioned one end side having the flexible hose. A hose is connected and has a connecting portion on the other end side, and a connecting pipe having a curved portion between them,
A handle provided on the connecting pipe, an extension pipe detachably connected to the connecting portion of the connecting pipe, and a floor suction tool connected to the extension pipe and having a rotating brush and a rotating brush driving electric motor. The hose and the extension pipe are respectively provided with power supply lines for supplying electric power from the cleaner body to the electric motor of the floor suction tool, and the handle is connected to the hose connection side from the vicinity of the curved portion of the connection pipe. The operating section is provided with an operating section extending substantially in the extending direction and a grip section curved from the operating section to the connecting pipe side, and a hand controller for controlling the electric blower and the brush motor is housed in the operating section, and the operating section is also provided. In the component storage room formed between the hose connection side of the connection pipe and the connection pipe, a power transformer for supplying power to the circuit component of the hand control unit from the power supply line is arranged, and the control circuit component of the electric blower is installed in the cleaner body. Mounted blast Along with arranging the control circuit, a power supply transformer for supplying power to the control circuit parts is arranged on the blower control circuit board, and the hand control unit and the blower control circuit board are connected by the signal line provided on the flexible hose. It is characterized by having done.

(E) Operation According to the above configuration, the hand operation unit and the blower control circuit board are individually supplied with power by the power transformers provided in the respective units, so that the transformer capacities are reduced and therefore the transformers are downsized. And can be made lighter. Moreover,
Since each transformer is arranged on each board, noise is not picked up between the transformer and the board, and the wiring inside the flexible hose can also be used as a power source for the brush motor. The power supply line and the pair of signal lines for transmitting the control signal become four in total, and the hose can be reduced in weight.

In addition, since the component storage chamber for storing the transformer is formed between the operation portion and the connecting pipe, the handle portion does not have to be upsized and the grip portion does not interfere with the gripping operation. It can be formed using an empty space.

Further, cleaning is performed by gripping the grip of the grip, but since the grip extends from the grip, operability is improved by manufacturing the grip with an arbitrary diameter that facilitates gripping. Since the grip portion is formed so as to be curved toward the connecting pipe from the operation portion that extends in substantially the same direction as the extension pipe, it is easy to apply a push-pull operation force, and the operation portion can be held while the grip portion is gripped. Can be operated and the operability is improved.

(F) Embodiment One embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 9.

Reference numeral 1 denotes a cleaner body having a dust collecting part and an electric blower 2 built therein. An electric floor suction tool 3 includes a rotating brush 4, a brush motor 5 for driving the rotating brush, and a rotational force transmitting belt 6. 7 is a flexible hose whose one end is connected to the cleaner body 1, 9 is a connecting pipe having a connecting portion to which the other end of the flexible hose 7 is connected, and the other end is for floor It has a connecting portion for the extension tube 10 to which the suction tool 3 is connected, and forms a curved portion between both connecting portions. Reference numeral 8 denotes a handle formed on the upper surface side of the connecting pipe 9, an operating portion 41 extending from the connecting side of the extending pipe 10 of the connecting pipe 9 in a substantially extending direction of the extending pipe 10, and a connecting pipe from the operating portion 41. The grip portion 42 is curved toward the 9 side. The flexible hose 7 includes a pair of steel wires 11 and 11 which also serve as signal lines and a pair of power supply wires 12 and 12.
Are provided in a spiral shape, and a pair of electric wires 13, 13 for supplying electric power to the brush motor 5 of the floor suction tool 3 are embedded in the extension pipe 7.

In the handle 8, a case 14 having an upper surface opening integrally formed on the upper surface side of the pipe 9 forms a component storage chamber 43 between the operation portion 41 and the hose connection side of the connecting pipe 9. The operation unit 41 of the case 14 accommodates a hand control unit 15 for performing on / off control and power control of the electric blower 2 and performing on / off control of the floor suction device 3. The hand control unit 15 is for displaying and operating a first control printed circuit board 17 having control circuit components such as a first power transformer 16 and a plurality of display light emitting diodes 18a-18e and switches 19a, 19b, 19c. It is divided into a second control printed circuit board 21 on which components and a microcomputer element 20 are mounted, and an insulating sheet plate 22 is interposed between the first control printed circuit board 17 and the second control printed circuit board 21. 1 control printed circuit board 17 is the first power transformer
16 is mounted so as to be stored in the component storage chamber 43. The first power transformer 16 is connected to the power supply lines 12 and 12,
Since the brush motor 5 power supply 100V power supplied from the cleaner body 1 via the power supply lines 12 and 12 is stepped down and supplied to the hand control unit 15, it is used as the power supply only for the hand control unit 15. , Using a small capacity.

Reference numeral 23 denotes a cover member which is screwed and fixed by covering the upper surface opening of the case 14, and the surface of the cover member 23 is sequentially switched between power-on and output of the electric blower 2 in four steps as shown in FIG. Button 24a of the output switch 19a,
Button 24b of stop switch 19b to turn off all power,
The operation button group 24 including the button 24c of the brush switch 19c for turning on / off the brush motor 5 is arranged on the side of the grip portion 42 of the operation portion 41, and the operation portion 41 is gripped by the grip portion 42.
The operation button group 24 can be operated. Further, the cover member 23 has a display unit 2 including four display light emitting diodes 18a, 18b, 18c, 18d for displaying the output of the electric blower 2 and a rotary brush drive display light emitting diode 18e.
By disposing 5 at a position far from the operation button group 24, the display section 25 can be confirmed while operating the operation button group 24 while holding the grip section 42.

Reference numeral 26 is a current detecting element mounted on the second control printed circuit board 21. One of the connecting electric wires 27, 27 for connecting the power supply lines 12, 12 and the electric wires 13, 13 of the extension tube 10 is connected to the current detecting element 26. By penetrating through the center, the current of the AC100V power source flowing through the brush motor 5 is detected.

The vacuum cleaner body 1 accommodates a blower control circuit board 28 for controlling the output of the electric blower 2 in accordance with a control signal transmitted from the hand control unit 15 via the steel wires 11 and 11. Is equipped with a small capacity second power supply transformer 29 for stepping down and supplying 100V power.

The brush motor 5 in the floor suction device 3 is composed of a DC motor, and the AC motor 100V power supplied by the pair of electric wires 13 in the floor suction device 3 is converted into a direct current and stepped down to generate a brush motor which will be described later. DC / Step-down circuit mounted on the printed circuit board 39
The brush motor 5 is supplied from 38.

Next, FIG. 7 is a block diagram of the circuit of the present invention. As shown in FIG. 7, in the hand control unit 25, 25 is a display unit, 19 is an operation switch unit operated by the operation button group 24, and 20 is an operation switch unit. A microcomputer element, 30 is a first power supply circuit including a first power supply transformer 16 and having a constant voltage section and a microcomputer reset section 31, 32 is a brush motor control circuit, and 33 is on / off control using a bidirectional thyristor. A brush motor drive circuit composed of a circuit controls ON / OFF of the supply of AC100V power to the brush motor 5. Reference numeral 34 compares the detection value detected by the current detection element 26 with a predetermined reference value, and sends a signal to the microcomputer element 20 when the detection value continuously exceeds the reference value for a predetermined time, and a brush motor drive circuit 33 is an overcurrent detection circuit configured to turn off the power supply to the brush motor 5 by 33.

In the blower control circuit board 28, 35 is an electric blower control circuit, 36 is an electric blower drive circuit consisting of a phase control circuit using a trigger element such as a bidirectional thyristor, a control signal output from the microcomputer element 20. By the control circuit 35, the phase is set and changed to turn on and off the electric blower 2 and the power control of the fourth stage <strong (strong), floor / tatami (medium), sofa (weak), curtain (weakest)>. To do. 37 is a second power supply circuit including a second power supply transformer 29 for supplying power to the control circuit board 28.

Reference numeral 38 denotes a DC / step-down circuit mounted on the brush motor printed circuit board 39 housed in the floor suction device 3.

Reference numeral 40 denotes a thermostat for preventing excessive temperature rise, which serves as a temperature sensor disposed near the electric blower 2, and is configured to turn off all power sources when the electric blower 2 is overheated and overheated. After that, even if the thermostat 40 is cooled and turned on, the reset unit 31 of the first power supply circuit 16 operates to return the microcomputer element 20 to the initial state and prevent the electric blower 2 and the brush motor 5 from operating without permission. Has become.

Next, the control of the electric blower 2 will be described with reference to the circuit diagram of the main part shown in FIG. 8 and the flowchart of the main part shown in FIG.

In FIG. 8, the first to the first microcomputer elements 20 are provided.
The fourth output terminals PC1 to PC4 are connected to the display light emitting diode 18a.
~ 18d are connected respectively. Each of the light emitting diodes 18a to 18d has a light emitting diode 42 for controlling the optical coupling elements 41a to 41d.
a~42d are connected in parallel, the output unit 43a~43d of the second to fourth optical coupling element 41a~41d connecting the resistor R ₂₁ to R ₂₃ of different resistance values. The resistance value is set to 0 by not connecting a resistor to the output section 43a of the first optical coupling element 41a, and the resistance value is set to R ₂₃ > R ₂₂ > R ₂₁ , indicating strong, medium, weak, and weakest. The light emitting diodes 18a to 18d are configured so that their resistance values gradually increase, and this resistance value is set to the two steel wires 11, 11
Is transmitted to the electric motor control circuit 35.

When the output changeover switch 19a is operated, the first output terminal PC1 of the microcomputer element 20 changes from the H level to the L level, the "strong" display light emitting diode 18a lights up, and the first optical coupling element 41a turns on. being driven, exceeds a voltage charging voltage of the capacitor C ₁ in the phase control circuit is set at a partial pressure of resistors R _4, R ₅ bidirectional thyristor TRA1, rendered conductive PUT indicated by P1, the pulse transformer PTR1 , Diode D ₁ generates a trigger signal and bidirectional thyristor TR
Make A1 the same.

On the other hand, when the PUT indicated by P1 becomes conductive, the capacitor C ₁
Discharges, is charged through again resistor R _3, the charge-discharge condition has a first output terminal PC1 is continued until again H state. When the output changeover switch 19a is operated again, the first output terminal PC1 is in the H state, the second output terminal PC2 is in the L state, and the "medium" display light-emitting diode 18b is lit up, and at the same time, the second optical coupling element 41b. There is driven, since the charging of the capacitor C ₁ is carried out via the resistor R ₃ and R _21, it slows the charging time of the capacitor C _1. Therefore, the trigger signal of the bidirectional thyristor TRA1 is also delayed within the AC power supply half-wave cycle, so that the amount of electricity supplied to the electric blower 2 is reduced and the output is reduced. Then, the resistance value is because it is _{R 23> R 22> R 21} , the charging time of the capacitor C ₁ whenever operating the output switch 19a is sequentially delayed, thus the power supply amount to the electric blower 2 is decreased, The output gradually decreases as <strong, medium, weak, and weakest>.

When the stop switch 19b is operated, all the output terminals PC1 to PC4 are in the H state, the light emitting diodes 18a to 18d are turned off, and the electric blower 2 is stopped. The microcomputer element 20 determines whether or not the brush switch 19c is pressed only when the electric blower 2 is turned on by the pressing operation of the output selector switch 19a and is rotating, and the brush motor is operated each time the brush switch 19c is operated. The brush motor drive circuit 33 is on / off controlled via the control circuit 32 to turn on / off the power supply to the brush motor 5.

When the stop switch 19b is pressed, the brush switch 1
Regardless of the pressing state of 9c, the brush motor 2 is turned off, the display light emitting diode 18e is turned off, and the stop switch 1
By operating 9b, the electric blower 2 and the brush motor 5 are given priority over the output changeover switch 19a and the brush switch 19c.
Turn off.

Then, when the user inserts the power supply into the outlet, the microcomputer device 20 performs the initial setting and the reset unit 31 performs the entire stop process. When the output selector switch 19a is operated in this state, the output of the electric blower 2 is controlled in a strong stage to turn on, and thereafter, the output of the electric blower 2 is in a strong stage → middle stage → weak stage every time the selector switch 19a is operated. → The weakest stage → The strongest stage ... It switches sequentially in a cyclic manner, and the corresponding display light emitting diodes 18a to 18d light up. When the brush switch 19c is operated in this state, the brush motor 5 is switched between a driving state and a stopping state for each operation, and the display light emitting diode 18e is turned on / off correspondingly.

The user can clean with a most suitable dust absorption force according to the type and condition of the cleaning surface such as forging and tatami, and when cleaning the forging, rotate the rotating brush to pick up the dust of the forging and tatami mats. When cleaning the floor or floor, you can stop the rotating brush and clean the tatami floor without damaging the floor. When the stop switch 19d is operated, the electric blower 2 and the brush motor 5 are stopped. If the electric blower 2 overheats due to overload, the thermostat
When the 40 operates and the operation of the electric blower 2 is stopped and the thermostat 40 is cooled and turned on, the reset unit 31 returns the microcomputer element 20 to the initial state and performs the complete stop process. The brush motor 5 does not operate arbitrarily, and safety can be improved.

(G) Effect of the Invention According to the present invention, since power is individually supplied to the hand control unit and the blower control circuit board in the cleaner body by the first power transformer and the second power transformer, respectively, the power supply capacity of each transformer is increased. Is smaller and a smaller transformer can be used. Therefore, the weight of the connecting pipe having the hand control unit can be reduced, and it becomes easier to hold the pipe during cleaning, and the usability can be improved.
Further, since the component storage chamber for storing the first power transformer is formed between the operation portion and the connecting pipe, the handle is not enlarged and the gripping operation of the grip portion is not hindered. It can be formed by utilizing the empty space of the handle. Further, by forming the handle with an arbitrary diameter that is easy to hold, the usability and push-pull operability can be improved, and the holding part is provided on the connecting pipe side from the operating part that extends in substantially the same direction as the extension pipe. Since it is formed in a curved shape, the push-pull operation force can be easily applied, and the operation portion can be operated while holding the grip portion, and operability can be improved. Further, since the respective transformers are arranged on different substrates, it is possible to perform highly reliable control without picking up noise. Furthermore, the wiring between the main body of the vacuum cleaner and the operation part at hand can be a total of four wires, only a pair of power supply lines for the AC100V power supply and a pair of signal lines for controlling the electric blower. And the wiring process of the flexible hose can be simplified, and the weight of the flexible hose can be reduced.

[Brief description of drawings]

The drawings all relate to the electric vacuum cleaner of the present invention. FIG. 1 is a layout view of electrical components, FIG. 2 is an overall view, FIG. 3 is a cross-sectional view of a connecting pipe, FIG. 4 is a top view of the connecting pipe, and a fifth view. FIG. 6 is a perspective view of the second control printed circuit board, FIG. 6 is a partially cutaway top view of the electric floor suction tool, FIG. 7 is a block diagram of an electric circuit, and FIG. 8 is a main part including a control unit of the electric blower. FIG. 9 is a flow chart of a main part of the electric circuit diagram of the part. 1 ... Vacuum cleaner body, 2 ... Electric blower, 3 ... Electric floor suction tool, 5 ... Brush motor, 7 ... Flexible hose,
9 …… Connection pipe, 10 …… Extension pipe, 11 …… Steel wire, 12 ……
Power supply line, 13 ... Electric wire, 15 ... Hand control unit, 16 ... First power transformer, 28 ... Blower control circuit board, 29 ... Second power transformer. 41 …… Operation part, 42 …… Grip part, 43 …… Parts storage room.

Claims (1)

[Claims] 1. A cleaner body having a dust collector and an electric blower built therein, a flexible hose having one end connected to the cleaner body, the hose connected to one end and the other end connected. And a connecting pipe having a curved portion between them,
A handle provided on the connecting pipe, an extension pipe detachably connected to the connecting portion of the connecting pipe, and a floor suction tool connected to the extension pipe and having a rotating brush and a rotating brush driving electric motor. Provided in the hose and the extension pipe, respectively, the power supply line for supplying the electric power from the cleaner body to the electric motor of the floor suction device, the handle is connected to the hose connecting side from the vicinity of the curved portion of the connecting pipe. The operating section is provided with an operating section extending substantially in the extending direction and a grip section curved from the operating section to the connecting pipe side, and a hand controller for controlling the electric blower and the brush motor is housed in the operating section, and the operating section is also provided. In the parts storage room formed between the connection pipe and the hose connection side of the connection pipe, a power transformer that supplies power to the circuit parts of the hand control unit from the power supply line is installed, and the control circuit parts of the electric blower are installed in the cleaner body. Equipped with sending In addition to arranging the machine control circuit board, a power supply transformer for supplying power to the control circuit parts is arranged on the blower control circuit board, and the hand control unit and the blower control circuit board are connected to the signal line provided on the flexible hose. An electric vacuum cleaner characterized by being connected together.