JPH0591545U - Vacuum cleaner - Google Patents

Abstract

(57) [Summary] [Purpose] The pressure fluctuation hole 27 of the connecting pipe 26 enables accurate identification of the difference in cleaning surface. [Structure] A suction port 16 is provided on the bottom surface of a suction tool 15 which moves on a cleaning surface, and dust sucked from the suction port 16 is passed through an extension pipe 12 and a hose 11 by a fan motor 4 provided in a cleaner body 1. In an electric vacuum cleaner that controls the operation of the fan motor 4 in accordance with pressure fluctuations that are sucked and detected by a pressure sensor 14 provided in a ventilation path, a connecting pipe 26 that connects the extension pipe 12 to the suction tool 15. Since the connecting pipe 26 is provided with a pressure fluctuation hole 27 that opens and closes by a rotating operation, it is possible to accurately identify a difference in cleaning surface and perform an accurate automatic operation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a vacuum cleaner used in general households.

[0002]

[Prior Art]

 In the conventional vacuum cleaner of this type, the operation of the vacuum cleaner is complicated because the output of the fan motor has to be manually adjusted according to the condition of the floor surface. On the other hand, it is known that a pressure sensor is provided on the main body of the cleaner to detect the suction pressure of the fan motor and control the output of the fan motor.

[0003]

[Problems to be solved by the device]

 However, since there are various types of cleaning surfaces, such as tatami mats, boards, and carpets, it is difficult to identify them accurately and control the output of the fan motor appropriately.

[0004]

[Means for solving problems]

 In order to solve the above-mentioned drawbacks by focusing on this point, the present invention has a structure in which a suction port is provided on the bottom surface of a suction tool which moves on a cleaning surface, and dust sucked from the suction port is extended by a pipe and a hose. In the electric vacuum cleaner that controls the operation of the fan motor according to the pressure fluctuation detected by the pressure sensor provided in the ventilation path while suctioning by the fan motor provided in the cleaner body via the suction tool. A connecting pipe for connecting the extension pipe is rotatably provided, and this connecting pipe is provided with a pressure fluctuation hole that opens and closes by a rotating operation.

[0005]

[Action]

 The operation will be described. When the start / stop switch 19 of the operation unit 13 is pressed, the fan motor 4 starts the "quiet" operation. Next, when the suction force adjustment switch 20 is pressed, the fan motor 4 starts "quiet" operation, and switches to "weak", "medium", and "strong" operation each time it is pressed. When the brush operation switch 22 is pressed, the rotary brush 17 starts rotating and the rotation speed changes in four steps according to the operation mode of the fan motor 4.

To describe the automatic operation, when the automatic operation switch 21 is pressed, a signal of the pressure fluctuation measured by the pressure sensor 14 is sent to the microcomputer of the control board, and the cleaning surface of the cleaning surface stored in advance in the microcomputer is stored. Compared with the pressure fluctuation characteristics as shown in Fig. 5 depending on the difference, the state of the cleaning surface underway is judged and the best operation mode is selected to control the operation of the fan motor 4 and the brush motor 18. Since the condition of the surface changes from moment to moment, appropriate operation is performed accordingly.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. 1 is a cleaner body having a machine room 2 in the rear and a dust collecting room 3 in the front, and a machine for sucking dust in the machine room 2. A fan motor 4 is provided, wheels 5 are provided on both side surfaces thereof, and a component storage portion 6 for storing a clearance nozzle or the like is provided at an upper portion thereof. A U-shaped carrying handle 7 is provided in front of the component storage section 6, and a storage section lid 8 is provided on the upper surface.

An exhaust port (not shown) is provided on the rear surface of the machine chamber 2. A dust collection chamber lid 9 is provided on the upper surface of the dust collection chamber 3, and a main body suction port 10 is provided at the center of the dust collection chamber lid 9. A dust collection bag (not shown) for collecting the sucked dust is provided in the dust collection chamber 3 in communication with the main body suction port 10. Reference numeral 11 denotes a hose, one end of which is connected to the main body suction port 10 and the other end of which is connected to the extension pipe 12, and which is provided with an operating portion 13 and a pressure sensor 14.

A suction tool 15 is connected to the tip of the extension pipe 12, and the suction tool 15 has a suction port 16 on its bottom surface. The suction port 16 is provided with a rotary brush 17 for knocking out dust on the floor. The rotating brush 17 is driven by a brush motor 18 provided inside the suction tool 15. The operation unit 13 includes an operation stop switch 19, a suction force adjustment switch 20, an automatic operation switch 21, a brush operation switch 22, and lamps 23. In addition, a control board (not shown) including a microcomputer is provided in the operation unit 13, and the control board controls the suction force of the fan motor 4 and the rotation of the brush motor 18 to be “strong”, “medium”, and “weak”. "・" Quiet "is controlled in 4 stages.

A groove 24 continuous with the suction port 16 is provided on the bottom surface of the suction tool 15, and an airtight blade 25 made of rubber or the like is provided in the vicinity of the groove 24. Further, the suction tool 15 is provided with a connecting pipe 26 for connecting the extension pipe 12 so as to be rotatable, and is provided with a pressure fluctuation hole 27 which is opened and closed by the rotation of the connecting pipe 26. As shown by the broken line in FIG. 3, when the suction tool 15 is moved forward, the connecting pipe 26 is rotated and the pressure fluctuation hole 27 is hidden inside the suction tool 15, so that air is not sucked through this hole 27. When the tool 15 is retracted, the connecting pipe 26 pivots upward, the hole 27 appears outside the suction tool 15, and air is sucked through the hole 27, so that the pressure in the suction tool 15 decreases.

As the pressure fluctuation hole 27 is opened and closed by the normal cleaning operation of moving the suction tool 15 back and forth in this way, the pressure fluctuation characteristic due to the change of the floor surface becomes remarkable, so that the floor surface is identified by the micro computer. Will be easier. 28 is a fixed brush for removing lint such as jutan, which has fibers inclined toward the suction port 16. 29 is a suction tool wheel for smoothing the movement of the suction tool 15 with respect to the floor surface.

To explain the operation, when the operation / stop switch 19 of the operation unit 13 is pressed, the fan motor 4 starts a “quiet” operation. Next, when the suction force adjustment switch 20 is pressed, the fan motor 4 starts "quiet" operation, and switches to "weak", "medium", and "strong" operation each time it is pressed. When the brush operation switch 22 is pressed, the rotary brush 17 starts to rotate and the rotation speed changes in four steps according to the operation mode of the fan motor 4.

Explaining the automatic operation, when the automatic operation switch 21 is pressed, a signal of the pressure fluctuation measured by the pressure sensor 14 is sent to the microcomputer of the control board, and the cleaning surface of the cleaning surface stored in advance in the microcomputer is stored. Compared with the pressure fluctuation characteristics as shown in Fig. 5 depending on the difference, the state of the cleaning surface underway is judged and the best operation mode is selected to control the operation of the fan motor 4 and the brush motor 18. Since the condition of the surface changes from moment to moment, appropriate operation is performed accordingly. By opening and closing the pressure fluctuation hole 27 in the normal cleaning operation of moving the suction tool 15 back and forth in this way, the pressure fluctuation characteristics due to changes in the floor surface become remarkable, so that the difference in the cleaning surface can be accurately identified. It is possible.

[0014]

[Effect of the device]

 As described above, according to the present invention, the suction port is provided on the bottom surface of the suction tool that moves on the cleaning surface, and the dust sucked from the suction port is provided by the fan motor provided in the cleaner body through the extension pipe and the hose. In an electric vacuum cleaner that controls the operation of the fan motor according to the pressure fluctuations that are sucked and detected by a pressure sensor provided in the air passage, the connecting pipe that connects the extension pipe to the suction tool is rotated. Since this connection pipe is equipped with a pressure fluctuation hole that opens and closes when it is rotated, the characteristics of pressure fluctuation due to differences in cleaning surface become more prominent, and differences in cleaning surface can be accurately measured. It became possible to identify, and it became possible to perform accurate automatic driving.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a bottom view of the suction device.

FIG. 3 is an enlarged sectional view taken along line AA of FIG.

FIG. 4 is a schematic diagram of the circuit.

FIG. 5 is a diagram showing a variation characteristic of the suction pressure.

[Explanation of symbols]

 4 Fan Motor 13 Operation Part 14 Pressure Sensor 15 Suction Tool 16 Suction Port 26 Connection Pipe 27 Pressure Fluctuation Hole

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Creator Koji Kojima 7-7 Higashishinpo, Sanjo City, Niigata Prefecture

Claims (1)

[Scope of utility model registration request] 1. A fan motor provided with a suction port 16 on a bottom surface of a suction tool 15 which moves on a cleaning surface, and dust which is sucked from the suction port 16 is provided in a cleaner body 1 through an extension pipe 12 and a hose 11. In the electric vacuum cleaner which controls the operation of the fan motor 4 in accordance with the pressure fluctuation detected by the pressure sensor 14 provided in the ventilation path while being sucked by the connection 4, the extension pipe 12 is connected to the suction tool 15. An electric vacuum cleaner characterized in that a pipe (26) is rotatably provided, and the connecting pipe (26) is provided with a pressure fluctuation hole (27) that opens and closes by a rotating operation.