JPH0568458U - Vacuum cleaner - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The purpose is to reduce noise during cleaning in a vacuum cleaner that runs automatically. [Structure] A suction motor 2 of a vacuum cleaner that runs automatically, a motor cover 3 that covers the outer periphery of the suction motor 2, and a speaker 4 are provided therein. From the speaker 4, a sound having a phase opposite to that of the noise generated from the suction motor 2 is generated during suction, and when the suction is not performed, a sound indicating the cleaning state is played. [Effect] It is possible to reduce the noise from the suction motor and the function of notifying the cleaning state with one speaker.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vacuum cleaner, and more particularly to a self-propelled vacuum cleaner that generates noise in a phase opposite to that of a noise of a suction motor to eliminate the noise.

[0002]

[Prior Art]

 Conventionally, for example, in a vacuum cleaner 1 that performs self-propelled cleaning as shown in FIG. 5, a speaker 4 for notifying a cleaning state is fixed to the vacuum cleaner 1 by using a screw 9 toward the outside.

The speaker 4 plays a role of notifying the user of the start and end of cleaning, a dangerous state, or another operation.

FIG. 6 shows a circuit block diagram of the vacuum cleaner 1. A voice signal for notifying the operating status is stored in the ROM 11 in advance. Before starting cleaning, the CPU 10 sends a signal to the voice IC 13 to extract a signal for starting cleaning from the ROM 11.

This signal is converted into sound by a sound IC and oscillated from the speaker 4 via the AMP 16.

After this processing is completed, a signal is sent from the COU 10 to the suction motor drive circuit 12 to drive the suction motor 2 to start cleaning.

Upon completion of cleaning, the CPU 10 sends a signal to the suction motor drive circuit 12 to stop the suction motor 2.

After that, similarly to the above, the cleaning completion data is sent from the ROM 11 to the voice IC 13, and the speaker 4 oscillates via the AMP 16.

FIG. 7 shows a noise countermeasure of a conventional vacuum cleaner.

A measure against noise of the suction motor 2 of the vacuum cleaner shown in FIG. 7A is a method of covering the suction motor 2 itself with a case 6 made of a material having a high sound quality.

As a measure against noise of the suction motor 2 of the vacuum cleaner shown in FIG. 7B, the exhaust passage 7 of the suction motor 2 is formed in a labyrinth to attenuate noise from the suction motor 2 in the exhaust passage 7. It is a method.

[0012]

[Problems to be solved by the device]

 However, in the method shown in FIG. 7A, since the suction motor 2 is covered with the case 6, there is a problem that heat dissipation of the suction motor 2 becomes difficult. Further, as the sound insulating material, a high specific gravity synthetic resin or the like can be considered, but such a resin has a drawback that the weight of the entire vacuum cleaner increases.

In the method shown in FIG. 7B, since the exhaust path 7 of the suction motor 2 has a labyrinth structure, the exhaust path 7 becomes large and the cleaner itself also becomes large. ..

[0014]

[Means for Solving the Problems]

 In order to solve the above problem, the present invention uses a speaker that informs the cleaning state by voice, and causes a noise having a phase opposite to the noise at the time of suction to flow from this speaker to reduce the noise at the time of suction.

[0015]

[Action]

 By oscillating a sound with a phase opposite to that of the noise generated from the suction motor from the speaker and applying it to the part that is generating the noise, it becomes possible to eliminate the sound and the sound in a certain frequency range.

[0016]

【Example】

 1 to 4 show an embodiment of the present invention.

FIG. 2 shows a principle for reducing noise. This uses active control of the sound field used as a noise countermeasure. Active control is a control in which the sound to be silenced has a similar waveform to that of the sound to be silenced, and in general, a sound with opposite phase is used to mute the noise to be deleted by using a microphone and a speaker, and the phase of the collected sound is determined. The noise is reduced by reversing and oscillating from the speaker and causing the sound oscillating from the cleaner and the sound oscillating from the speaker 4 to interfere with each other as shown in FIG. In addition, by measuring the sound f1 generated from the vacuum cleaner in advance and causing the oscillator to oscillate a sound f2 having a phase opposite to that of the sound f1 generated from the vacuum cleaner 1, it is possible to use a microphone. However, the noise can be canceled.

FIG. 1 is a sectional view of a device according to an embodiment of the present invention. In the vacuum cleaner body 1 of the present embodiment, a speaker 4 which informs the cleaning state by voice is arranged inside the motor cover 3 of the suction motor 2 and is fixed to the motor cover 3 with screws 9.

The motor cover 3 is arranged so as to cover the outer periphery of the suction motor 2, and an opening 3a is provided so that only the rear side allows air flow. The flow of air generated during suction flows to the outside through the opening 3a and the exhaust port 5 provided in the cleaner 1.

FIG. 3 shows a circuit block diagram of the silencer 17 of this embodiment. In the present embodiment, one speaker is used to share a speaker for generating a sound signal for silencing and a speaker for generating a sound signal for reporting the operating condition of the vacuum cleaner. The voice signal input to the speaker 4 is used by switching it with the switch 14 (SW14).

A voice signal for notifying the operating condition of the cleaner body 1 is stored in the ROM 11 in advance. Further, the oscillator 15 is adjusted so as to oscillate a signal having a phase opposite to the noise frequency of the suction motor 2.

The CPU 10 sets the SW 14 to the voice IC 13 side first, and sends a signal indicating the type of voice from the CPU 10 to the voice IC 13 as necessary.

The voice IC 13 takes in the signal stored in the ROM 11 and causes the speaker 4 to generate the voice through the amplifier ((AMP) 16).

During the rotation of the suction motor 2, the CPU 10 sets the SW 14 to the oscillator 15 side, and causes the speaker 4 to generate a signal having a phase opposite to that of the noise through the AMP 16.

Whether the voice is generated from the speaker 4 or the antiphase sound is oscillated is selected by switching the SW 14 by the CPU 10.

FIG. 4 shows an operation flowchart in the CPU for sounding the speaker. Before the cleaning is started, the CPU 10 sends a signal to the voice IC 13 to extract the data for starting the cleaning from the ROM 11. This data is voiced by the voice IC and generated from the speaker 4 via the AMP 16 (step 101). At this time, the SW 14 is on the voice IC 13 side.

After this processing is completed, the CPU 10 sends a signal to the suction motor drive circuit 12 to drive the suction motor 2 to start cleaning (step 102).

At the same time when the suction motor 2 is rotated, the SW 14 is set to the oscillator 15 side by the CPU 10 (step 103).

As a result, the speaker 4 produces a sound whose phase is opposite to that of the noise of the suction motor 2, and the noise is reduced (step 104).

Upon completion of cleaning, the CPU 10 sends a signal to the suction motor drive circuit 12 to stop the suction motor 2 (step 105).

After that, the CPU 10 sets the SW 14 to the voice IC 13 side (step (106)) Further, the voice data indicating the end of cleaning is sent from the ROM 11 to the voice IC 13 and is generated from the speaker 4 via the AMP 16 (step). 109).

In this embodiment, an ordinary electronic circuit system is used as the oscillator, but a digital oscillator that reads out a signal having an arbitrary waveform stored in advance and generates a signal may also be used. Good.

Next, FIG. 1B shows another embodiment according to the present invention. In this embodiment, a microphone 18 for detecting noise generated by the cleaner is installed in the cleaner body 1, and the voice signal detected by the microphone 18 is sent to the muffler 17a. The muffler 17a shifts the phase of the audio signal detected by the microphone 18 by 180 °, widens it to the same level as the noise level, and then outputs it to the speaker 4. The speaker 4 generates a sound whose phase is opposite to that of the noise, and can cancel the noise generated by the vacuum cleaner.

[0034]

[Effect of the device]

 According to the vacuum cleaner of the present invention, the noise generated by the vacuum cleaner is generated by causing the speaker, which generates the sound that reports the operation status of the vacuum cleaner, to generate a sound whose phase is opposite to that of the noise generated by the vacuum cleaner. Can be canceled.

[Brief description of drawings]

FIG. 1 (a) is a sectional view showing an embodiment of a vacuum cleaner according to the present invention.

FIG. 1 (b) is a sectional view showing another embodiment of the vacuum cleaner according to the present invention.

FIG. 2 (a) is a basic diagram showing the principle of active control of the present invention.

FIG. 2 (b) is a frequency diagram showing the principle of active control according to the present invention.

FIG. 3 is a circuit block diagram of the vacuum cleaner of the present invention.

FIG. 4 is a flowchart showing the operation of the CPU of the vacuum cleaner of the present invention.

FIG. 5 is a cross-sectional view showing a conventional vacuum cleaner.

FIG. 6 is a circuit block diagram of a conventional vacuum cleaner.

FIG. 7 (a) is a partial cross-sectional view showing a noise countermeasure method using a case of a conventional vacuum cleaner.

FIG. 7 (b) is a partial cross-sectional view showing a noise countermeasure method in which the exhaust path of the conventional vacuum cleaner is changed.

[Explanation of symbols]

 1 Vacuum Cleaner 2 Suction Motor 3 Motor Cover 4 Speaker 5 Exhaust Port 6 Case 7 Tube 8 9 Screw 10 CPU 11 ROM 12 Suction Motor Drive Circuit 13 Voice IC 14 SW 15 Oscillator 16 AMP 17 Silence Device 18 Microphone

Claims (3)

[Scope of utility model registration request] 1. A vacuum cleaner comprising a silencer for generating an audio signal having a phase opposite to that of noise generated by the vacuum cleaner. 2. The silencer includes an oscillator that generates a signal whose phase is opposite to that of noise generated by the vacuum cleaner, and a speaker that converts the generated signal into sound. Vacuum cleaner as described. 3. The muffler comprises a microphone for converting noise generated by a vacuum cleaner into an electric signal, a phase converter for converting the phase of the electric signal by 180 °, and a phase of 180 °.
The vacuum cleaner according to claim 1, further comprising a speaker that converts the converted electric signal into sound.