JP6697345B2 - Ultrasonic cleaner - Google Patents

Description

  This invention relates to an ultrasonic cleaner.

  2. Description of the Related Art Conventionally, as an ultrasonic cleaner, there is one that removes dirt adhering to clothes by ultrasonic waves (for example, see Japanese Patent No. 3768978 (Patent Document 1)).

Patent No. 3768978

  By the way, in the above ultrasonic cleaner, the ultrasonic vibrator is driven by a battery. In such an ultrasonic cleaner, when the remaining battery level is detected and an alarm is displayed, the power supply voltage is greatly disturbed at the frequency of ultrasonic oscillation during driving, so the power supply voltage of the battery cannot be accurately measured. There's a problem.

  In particular, when the ultrasonic cleaner is equipped with a control microcomputer, in addition to ultrasonic oscillation during cleaning, clothing contacts the vibrating part and the load increases, so due to a sudden drop in the power supply voltage, There is a problem that the microcomputer is reset before stopping the ultrasonic wave.

  Then, the subject of this invention is providing the ultrasonic cleaner which can prevent the malfunction of a microcomputer, correctly measuring a battery remaining amount.

In order to solve the above problems, the ultrasonic cleaner of the present invention,
Ultrasonic vibrating section,
A drive unit for driving the ultrasonic vibrating unit,
A controller for controlling the drive unit, a battery for supplying power to the drive unit and the control unit,
The control device is
A first battery voltage measuring unit that measures a voltage of the battery ultrasonic low There first sampling frequency Ri by the frequency of the vibration generated by the ultrasonic vibrating unit,
A battery remaining amount calculating unit that calculates the remaining amount of the battery based on the voltage of the battery measured by the first battery voltage measuring unit;
A second battery voltage measurement for measuring the voltage of the battery at a second sampling frequency higher than the first sampling frequency and higher than 1/10 of the frequency of the ultrasonic vibration generated by the ultrasonic vibration unit. Department,
Based on the voltage of the said battery, which is measured by the second battery voltage measurement unit, possess and determining malfunction determination unit malfunction the possibility of generating of the control device,
The measurement of the voltage of the battery by the second battery voltage measurement unit and the determination by the malfunction determination unit are performed only when the ultrasonic vibration unit is driven .

Further, in the ultrasonic cleaner of one embodiment,
When the malfunction determination unit determines that the malfunction of the control device is likely to occur, the control device stops the oscillation of the ultrasonic vibration unit.
Further, in the ultrasonic cleaner of one embodiment,
When the oscillation of the ultrasonic vibration unit is stopped by the determination of the malfunction determination unit, the oscillation of the ultrasonic vibration unit is continued until the voltage of the battery measured by the first battery voltage measurement unit exceeds a predetermined value. The stop is not released.

Further, in the ultrasonic cleaner of one embodiment,
Information regarding the remaining amount of the battery calculated by the remaining battery amount calculating unit and information regarding the possibility of malfunction of the control device determined by the malfunction determining unit are indicated by at least color or lighting / flashing. A single display unit is provided for displaying the same light emission portion collectively.

Further, in the ultrasonic cleaner of one embodiment,
The control device includes a microcomputer,
An oscillator circuit for supplying a clock signal to the microcomputer is provided,
The temperature characteristic of the oscillation circuit is set so that the oscillation frequency is stable within a preset temperature range.

  As is clear from the above, according to the present invention, the remaining amount of the battery is calculated based on the voltage of the battery measured at the first sampling frequency much lower than the frequency of the ultrasonic vibration, while the ultrasonic vibration is calculated. Accurate battery level measurement is performed by determining the possibility of malfunction of the microcomputer based on the voltage of the battery measured at the second sampling frequency higher than 1/10 of the frequency of At the same time, it is possible to realize an ultrasonic cleaner that can prevent malfunction of the microcomputer.

FIG. 1 is a perspective view of an ultrasonic cleaner of the first embodiment of the present invention. FIG. 2 is a perspective view showing a state in which the cap of the ultrasonic cleaner is attached. FIG. 3 is a perspective view showing a state where the cap of the ultrasonic cleaner is removed. FIG. 4 is a side view of the main body of the ultrasonic cleaner. FIG. 5 is a top view of the main body of the ultrasonic cleaner. FIG. 6 is a bottom view of the main body of the ultrasonic cleaner. FIG. 7 is a sectional view taken along the line VII-VII of FIG. FIG. 8 is a circuit diagram of the ultrasonic cleaner. FIG. 9 is a diagram showing changes in the remaining battery power, the battery voltage, and the voltage V _IN .

  Hereinafter, the ultrasonic cleaner of the present invention will be described in detail with reference to the illustrated embodiment.

[First Embodiment]
FIG. 1 shows a perspective view of an ultrasonic cleaning device according to a first embodiment of the present invention.

  As shown in FIG. 1, the ultrasonic cleaner of the first embodiment includes a rod-shaped main body 10 having a rectangular cross section, and a cap 20 that covers one end of the main body 10. The main body portion 10 has a rounded cross section so that it can be easily held by hand.

  A main part of the main body 10 is covered with a main body cover 11, and an ultrasonic horn 14 on the tip side is covered with a holder cover 12 and a horn cap 13.

  The holder cover 12 covers a holding portion (not shown) that holds the base portion 14b (shown in FIG. 7) of the ultrasonic horn 14. The tapered horn cap 13 fixed to the holder cover 12 covers the ultrasonic horn 14 excluding the tip. An interval is provided so that the horn cap 13 and the ultrasonic horn 14 do not come into contact with each other.

  2 shows a perspective view of the ultrasonic cleaner with the cap 20 attached, and FIG. 3 shows a perspective view of the ultrasonic cleaner with the cap 20 removed. 4 shows a side view of the main body 10 of the ultrasonic cleaner. 2 to 4, the same components as those in FIG. 1 are designated by the same reference numerals.

  Further, FIG. 5 shows a top view (front end side) of the main body 10 of the ultrasonic cleaner. 5, the same components as those in FIG. 1 are designated by the same reference numerals.

  As shown in FIG. 5, a long hole 13 a is provided on the tip side of the horn cap 13. The tip of the horn portion 14a (shown in FIG. 7) of the ultrasonic horn 14 projects from the elongated hole 13a of the horn cap 13.

  FIG. 6 shows a bottom view of the main body 10 of the ultrasonic cleaner. As shown in FIG. 6, the bottom surface of the main body 10 is covered with a bottom cover 15. Further, a push button switch 16 is attached to the center of the bottom cover 15. Further, a USB (Universal Serial Bus) cover 17 is attached to one of the outer sides of the push button switch 16 of the bottom cover 15 so as to be openable and closable.

  The push button switch 16 has an annular display portion 16a that is partially cut off in the circumferential direction and a linear display portion 16b that extends in the radial direction at the cut portion of the annular display portion 16a. The annular display portion 16a and the linear display portion 16b are a part of the display portion 105 (shown in FIG. 8).

  When the USB cover 17 is opened, the connection portion of the USB connector CN (shown in FIG. 7) is exposed.

  FIG. 7 shows a sectional view taken along the line VII-VII of FIG.

  As shown in FIG. 7, the main body 10 of the ultrasonic cleaner has a rechargeable battery BT and a main circuit board 32 arranged in a main body cover 11 having a rectangular cross section. The drive unit 103 (shown in FIG. 8) including the transformer 31 is mounted on the main circuit board 32. Further, an operation circuit board 33 and a push button switch 16 connected to the operation circuit board 33 are arranged on the rear end side (lower side in the drawing) in the body cover 11. A USB connector CN is arranged near the push button switch 16. A bottom cover 15 is attached to the rear end of the body cover 11.

  On the other hand, an ultrasonic horn 14 is attached to the tip side (upper side in the figure) of the main body cover 11. This ultrasonic horn 14 has a horn portion 14a on the front end side and a base portion 14b on the rear end side, and has a cross-sectional shape in which the cross-sectional shape gradually becomes flatter from the rear end-side base portion 14b having a circular cross-section. It is a rectangular horn portion 14a.

  The base portion 14b of the ultrasonic horn 14 includes an ultrasonic transducer 40. The ultrasonic horn 14 is an example of an ultrasonic vibrating section. The holder cover 12 is attached to the front end side of the main body cover 11 so as to cover the base portion 14b of the ultrasonic horn 14 and the ultrasonic transducer 40. Then, a horn cap 13 is attached to the tip end side of the holder cover 12 so as to surround the horn portion 14 a of the ultrasonic horn 14.

  A packing 41 is arranged between the base portion 14 b of the ultrasonic horn 14 and the holder cover 12. A packing 42 is arranged between the main body cover 11 and the holder cover 12.

  FIG. 8 shows a circuit diagram of the ultrasonic cleaner.

  As shown in FIG. 8, this ultrasonic cleaner has a battery BT, a DC / DC converter 101, a controller 102, a driver 103, a switch 104, a display 105, and an oscillator circuit 106. , USB connector CN. Note that, in FIG. 8, the description of the configuration of the circuit for turning the power on and off by the switch unit 104 is omitted.

  The control device 102 includes a microcomputer, an input / output circuit, and the like, and a first battery voltage measuring unit 102a that measures the voltage of the battery BT at a first sampling frequency of 10 Hz (100 msec intervals), and a first battery voltage measuring unit 102a. A battery remaining amount calculation unit 102b that calculates the remaining amount of the battery BT based on the voltage of the battery BT measured by the second battery voltage measurement unit 102c that measures the voltage of the battery BT at a second sampling frequency of 38 kHz. , And a malfunction determination unit 102d that determines the possibility of malfunction of the microcomputer based on the voltage of the battery BT measured by the second battery voltage measurement unit 102c.

  Here, the first sampling frequency is much lower than the frequency of the ultrasonic vibration generated by the ultrasonic horn 14, and the second sampling frequency is 1 of the frequency of the ultrasonic vibration generated by the ultrasonic horn 14. It is a frequency higher than the frequency of / 10. It should be noted that the second sampling frequency is preferably equal to or higher than the frequency of ultrasonic vibration, and the frequency approximately equal to the frequency of ultrasonic vibration is the frequency of ultrasonic vibration. In contrast, the frequency is within ± 10%.

The input terminal of the DC / DC converter 101 is connected to the positive terminal of the battery BT. Further, the power supply terminal VDD of the control device 102 is connected to the output terminal of the DC / DC conversion unit 101, and the power supply terminal VCC of the control device 102 is connected to the negative terminal of the battery BT. Further, the voltage input terminal V _IN of the control device 102 is connected to the positive terminal of the battery BT.

  Here, the DC / DC conversion unit 101 converts the DC voltage of 5.5 V (when the remaining battery power is 100%) of the battery BT into a DC voltage of 3.3 V according to the power supply voltage specification of the control device 102.

  A drive signal is output from the control device 102 to the drive unit 103. Further, the control device 102 outputs a control signal to the display unit 105. Further, a signal from the switch unit 104 is input to the control device 102.

  Then, the drive unit 103 drives the ultrasonic transducer 40 according to the drive signal from the control device 102. In the first embodiment, the frequency of ultrasonic vibration is 38 kHz. The frequency of ultrasonic vibration may be 30 kHz to 40 kHz, which is suitable for washing clothes.

The oscillator circuit 106 is composed of an inverter IV1 and capacitors C1 and C2. Specifically, the capacitor C1 is connected between the input terminal of the inverter IV1 and the ground GND, the capacitor C2 is connected between the inverting output terminal of the inverter IV1 and the ground GND, and the inverting output terminal of the inverter IV1 is connected to the control device 102. Of the clock input terminal C _X. The oscillation signal of the oscillation circuit 106 is used as a clock signal of the microcomputer of the control device 102.

  Also, USB connectors CN are connected to both ends of the battery BT. By connecting an external charger (not shown) to the USB connector CN via a USB cable, the DC voltage from the external charger is applied to both ends of the battery BT to charge the battery BT.

  In the ultrasonic cleaner having the above structure, when the push button switch 16 is pressed in a state where the battery BT is sufficiently charged (battery remaining amount is 100%), power is supplied from the battery BT and the DC / DC converter 101 Then, the control device 102, the drive unit 103, the display unit 105, and the oscillation circuit 106 operate. As a result, the annular display portion 16a and the linear display portion 16b of the push button switch 16 are lit in white, and the ultrasonic transducer 40 is driven by the drive portion 103 to vibrate. The vibration of the ultrasonic transducer 40 causes the ultrasonic horn 14 to vibrate ultrasonically.

  Then, the tip of the horn portion 14a of the ultrasonic horn 14 is applied to the clothes immersed in water, which is an example of the cleaning medium, to remove the dirt attached to the clothes by vibration.

  Next, when the push button switch 16 is pressed, the ultrasonic horn 14 stops the ultrasonic vibration and enters a sleep mode for 15 seconds (a mode in which power consumption is minimized). When the push button switch 16 is pressed again for 15 seconds in the sleep mode, the ultrasonic horn 14 starts ultrasonic vibration, and when 15 seconds elapse without operating the push button switch 16, the power is turned off.

In the first embodiment, the output voltage of the battery BT is as follows according to the remaining battery level.
Battery level 100%: 5.5V
Battery level 50%: 5.0V
Battery level 10%: 4.5V

FIG. 9 shows changes in the remaining battery power, the battery voltage, and the voltage V _IN . In FIG. 9, the upper graph shows changes in the remaining battery power and the battery voltage, and the lower graph shows the voltage applied to the voltage input terminal V _IN of the control device 102, that is, the DC / DC conversion unit 101 converts the voltage. It shows the change in the DC voltage.

  As shown in FIG. 9, when the battery voltage is higher than 3.5V, the DC voltage output of the DC / DC converter 101 is stable at 3.3V, but when the battery voltage becomes 3.5V or less, The DC voltage of the DC / DC converter 101 drops sharply.

  Therefore, when the battery voltage is equal to or lower than the threshold value of 3.5 V, the microcomputer of the control device 102 is reset and stopped.

  The threshold value of the battery voltage at which the microcomputer of the control device 102 is reset and stopped may differ depending on the configuration of the DC / DC converter 101 and the specifications of the microcomputer.

<Battery level display>
Here, when the output voltage of the battery BT measured by the first battery voltage measuring unit 102a becomes 5.0 V or less, the battery remaining amount calculated by the battery remaining amount calculating unit 102b of the control device 102 becomes 50% or less, When the battery remaining amount is not less than 10%, the annular display portion 16a and the linear display portion 16b of the push button switch 16 are blinked in white.

  Then, when the output voltage of the battery BT becomes 3.5 V or less, the output voltage of the DC / DC conversion unit 101 sharply decreases, and the microcomputer of the control device 102 is reset.

  Therefore, in the ultrasonic cleaner of the first embodiment, when the output voltage of the battery BT measured by the first battery voltage measuring unit 102a becomes 4.5 V or less before the microcomputer of the control device 102 is reset. The battery remaining amount calculated by the battery remaining amount calculating unit 102b of the control device 102 becomes 10% or less, and the annular display unit 16a and the linear display unit 16b of the push button switch 16 blink in orange.

<Malfunction monitoring>
Further, when the output voltage of the battery BT becomes 3.5 V or less, the output voltage of the DC / DC converter 101 sharply drops. In particular, when the ultrasonic horn 14 is ultrasonically vibrated, the battery voltage fluctuates up and down due to the vibration, and thus the microcomputer of the control device 102 is likely to be reset.

  Therefore, in the ultrasonic cleaner of the first embodiment, before the microcomputer of the control device 102 is reset, the output voltage of the battery BT measured by the second battery voltage measuring unit 102c is 4.5 V (remaining battery power). When the amount becomes 10% or less, the malfunction determining unit 102d of the control device 102 determines that malfunction of the microcomputer may occur, and immediately stops the oscillation of the ultrasonic horn 14.

  When the malfunction determination unit 102d of the control device 102 determines that a malfunction of the microcomputer may occur, and the oscillation of the ultrasonic horn 14 is stopped, it is linear with the annular display unit 16a of the push button switch 16. The display portion 16b is made to blink in orange.

  In this manner, when the oscillation of the ultrasonic horn 14 is stopped when the remaining battery power is 10% or less and the operation display mode in which the annular display portion 16a and the linear display portion 16b of the push button switch 16 are blinked in orange is set. The operation stop mode is not released until the battery BT is charged and the output voltage exceeds 5.0 V (battery level 50%).

  The calculation of the battery remaining amount by the battery remaining amount calculation unit 102b and the determination by the malfunction determination unit 102d are performed only when the ultrasonic horn 14 is in the ultrasonic vibration operation.

  The display when the malfunction determination unit 102d determines that the malfunction of the microcomputer may occur is different from that in which the annular display unit 16a and the linear display unit 16b of the push button switch 16 are blinked in orange. You may make it display by the display part of. As a result, the user can distinguish whether the remaining battery capacity is 10% or less or it is determined that the malfunction of the microcomputer may occur.

  In the ultrasonic cleaner having the above configuration, the battery remaining amount calculation unit 102b calculates the remaining amount of the battery BT based on the voltage of the battery BT measured by the first battery voltage measurement unit 102a at 10 Hz (first sampling frequency). calculate.

  For example, the average value of the voltage of the battery BT measured at 100 msec intervals (first sampling frequency 10 Hz) is calculated every 10 times, and the remaining amount of the battery BT corresponding to the average value is calculated in a predetermined table (or mathematical expression). Calculate using.

  The first sampling frequency may be a frequency much lower than the frequency of ultrasonic vibration generated by the ultrasonic horn 14 (ultrasonic vibrating section).

  On the other hand, the malfunction determining unit 102d determines the possibility of malfunction of the microcomputer based on the voltage of the battery BT measured by the second battery voltage measuring unit 102c at 38 kHz (second sampling frequency).

  The second sampling frequency may be higher than 1/10 of the frequency of ultrasonic vibration generated by the ultrasonic horn 14.

  As a result, according to the ultrasonic cleaner, it is possible to prevent malfunction of the microcomputer while accurately measuring the remaining battery level.

  Further, when the voltage of the battery BT measured at the second sampling frequency becomes equal to or lower than a preset threshold value (4.5 V in this embodiment), the malfunction determining unit 102d may cause malfunction of the microcomputer. Is determined to be high. At this time, by setting the threshold value to a value higher by a predetermined voltage than the voltage at which the microcomputer malfunctions, it is detected that the malfunction is likely to occur before the malfunction of the microcomputer occurs. It is possible to stop the oscillation of the ultrasonic horn 14.

  Further, when the malfunction determination unit 102d determines that the malfunction of the microcomputer is likely to occur, the microcomputer stops the oscillation of the ultrasonic horn 14 so that the clothes come into contact with the vibrating portion during cleaning. Even if the voltage of the battery BT sharply drops due to an increase in load, the reset of the microcomputer can be prevented by stopping the ultrasonic wave.

  In addition, the information regarding the remaining amount of the battery BT calculated by the battery remaining amount calculating unit 102b and the information regarding the possibility of malfunction of the microcomputer determined by the malfunction determining unit 102d are colored or lit / blinking. Since at least one of them is collectively displayed in the same light emitting portion on the display unit 105, the display unit 105 can be simplified and downsized by displaying the remaining battery capacity and the operation of the microcomputer in one display. it can.

[Second Embodiment]
The ultrasonic cleaner of the second embodiment of the present invention has the same configuration as the ultrasonic cleaner of the first embodiment except for the oscillation circuit 106, and FIGS. 1 to 8 are incorporated.

  In the ultrasonic cleaner of the second embodiment, the capacitor C1 has a temperature characteristic whose capacitance changes so that the oscillation frequency of the oscillation circuit 106 becomes stable within a predetermined temperature range (for example, 0 ° C. to 40 ° C.). , C2. Further, the oscillation frequency is changed by the microcomputer so as to be stable within a predetermined temperature range.

In the ultrasonic cleaning device having the above configuration, the clock signal input to the clock input terminal C _X of the control device 102 is stable, so that the frequency of the drive signal output to the drive unit 103 based on this clock signal is stable.

  As a result, the optimum oscillating frequency preset according to the ultrasonic horn 14 (ultrasonic vibrating section) whose vibrating resonance point is structurally determined is prevented from shifting due to temperature change. It is possible to prevent the output of ultrasonic vibration from decreasing due to the frequency change and the cleaning ability from decreasing.

  The ultrasonic cleaner of the second embodiment has the same effects as the ultrasonic cleaner of the first embodiment.

[Third Embodiment]
In the first and second embodiments described above, the ultrasonic cleaner including the ultrasonic horn 14 (ultrasonic vibrating section) has been described, but the invention is not limited to the ultrasonic vibrating section and includes a vibrating section that vibrates other than ultrasonic waves. The present invention may be applied to a cleaning device.

  Although specific embodiments of the present invention have been described, the present invention is not limited to the first and second embodiments described above, and various modifications can be carried out within the scope of the present invention. For example, a combination of the contents described in the first and second embodiments as appropriate may be an embodiment of the present invention.

  The present invention and embodiments are summarized as follows.

In order to solve the above problems, the ultrasonic cleaner of the present invention,
Ultrasonic vibrating section 14,
A drive unit 103 for driving the ultrasonic vibration unit 14;
The control unit 102 for controlling the drive unit 103, the drive unit 103, and the battery BT for supplying power to the control unit 102 are provided.
The control device 102 is
A first battery voltage measuring unit 102a for measuring the voltage of the battery BT at a first sampling frequency much lower than the frequency of the ultrasonic vibration generated by the ultrasonic vibration unit 14;
A battery remaining amount calculation unit 102b that calculates the remaining amount of the battery BT based on the voltage of the battery BT measured by the first battery voltage measurement unit 102a;
A second battery voltage measuring unit 102c for measuring the voltage of the battery BT at a second sampling frequency higher than 1/10 of the frequency of the ultrasonic vibration generated by the ultrasonic vibration unit 14;
A malfunction determination unit 102d that determines a possibility of malfunction of the control device 102 based on the voltage of the battery BT measured by the second battery voltage measurement unit 102c.

  According to the above configuration, the remaining battery charge is determined based on the voltage of the battery BT measured by the first battery voltage measuring unit 102a at the first sampling frequency much lower than the frequency of the ultrasonic vibration generated by the ultrasonic vibration unit 14. While the amount calculation unit 102b calculates the remaining amount of the battery BT, the second battery voltage measurement unit 102c has a second sampling frequency higher than 1/10 of the frequency of the ultrasonic vibration generated by the ultrasonic vibration unit 14. The malfunction determination unit 102d determines the possibility of malfunction of the control device 102 based on the voltage of the battery BT measured by. This makes it possible to prevent the malfunction of the control device 102 while accurately measuring the remaining battery level. According to the above, the second sampling frequency is set to a frequency higher than 1/10 of the frequency of the ultrasonic vibration generated by the ultrasonic vibrating unit 14, but is, for example, approximately 1/4 of the frequency of the ultrasonic vibration. It may be 10 kHz.

Further, in the ultrasonic cleaner of one embodiment,
The malfunction determination unit 102d determines that a malfunction of the control device 102 is likely to occur when the voltage of the battery BT measured at the second sampling frequency is equal to or lower than a preset threshold value.

  According to the above-described embodiment, when the voltage of the battery BT measured at the second sampling frequency becomes equal to or lower than the preset threshold value, the malfunction determination unit 102d has a high possibility that the malfunction of the control device 102 occurs. judge. At this time, by setting the threshold value to a value higher by a predetermined voltage than the voltage at which the control device 102 malfunctions, it is detected that the malfunction is likely to occur before the malfunction of the control device 102 occurs. Thus, for example, the oscillation of the ultrasonic vibration unit 14 can be stopped.

Further, in the ultrasonic cleaner of one embodiment,
When the malfunction determination unit 102d determines that the malfunction of the control device 102 is likely to occur, the control device 102 stops the oscillation of the ultrasonic vibration unit 14.

  According to the above-described embodiment, when the malfunction determination unit 102d determines that the malfunction of the control device 102 is likely to occur, the control device 102 stops the oscillation of the ultrasonic vibrating unit 14, thereby performing cleaning. Even if the battery voltage suddenly drops due to the load on the vibrating part coming into contact with the clothes, the reset of the microcomputer can be prevented by stopping the ultrasonic wave.

Further, in the ultrasonic cleaner of one embodiment,
The information regarding the remaining amount of the battery BT calculated by the battery remaining amount calculating unit 102b and the information regarding the possibility of malfunction of the control device 102 determined by the malfunction determining unit 102d are colored or lit. A display unit 105 is provided for collectively displaying the same light emitting portion by at least one of blinking.

  According to the above-described embodiment, information related to the remaining amount of the battery BT calculated by the battery remaining amount calculation unit 102b and information related to the possibility of malfunction of the control device 102 determined by the malfunction determination unit 102d are provided. Since at least one of the colors or lighting / blinking is collectively displayed on the same light emitting portion on the display unit 105, the display unit 105 can be simplified by combining the display of the battery remaining amount and the operation of the microcomputer with one display. It can be miniaturized and downsized.

Further, in the ultrasonic cleaner of one embodiment,
The control device 102 includes a microcomputer,
An oscillator circuit 106 for supplying a clock signal to the microcomputer is provided,
The temperature characteristic of the oscillation circuit 106 is set so that the oscillation frequency is stable within a preset temperature range.

  According to the above-described embodiment, the clock signal supplied from the oscillation circuit 106 to the microcomputer of the control device 102 is stable, so that the frequency of the drive signal output from the microcomputer to the drive unit 103 based on this clock signal is stable. As a result, the optimum oscillation frequency set in accordance with the ultrasonic vibrating portion 14 whose vibrating resonance point is structurally determined is prevented from shifting due to temperature change. Therefore, it is possible to prevent the output of ultrasonic vibration from decreasing due to a change in the oscillation frequency of the oscillation circuit 106 and the deterioration of the cleaning ability.

10 ... Main Body 11 ... Main Body Cover 12 ... Holder Cover 13 ... Horn Cap 14 ... Ultrasonic Horn (Ultrasonic Vibration Unit)
15 ... Bottom cover 16 ... Push button switch 16a ... Annular display 16b ... Linear display 17 ... USB cover 20 ... Cap 31 ... Transformer 32 ... Main circuit board 33 ... Operation circuit board 41, 42 ... Packing 101 ... DC / DC Conversion unit 102 ... Control device 102a ... First battery voltage measurement unit 102b ... Battery remaining amount calculation unit 102c ... Second battery voltage measurement unit 102d ... Malfunction determination unit 103 ... Driving unit 104 ... Switch unit 105 ... Display unit 106 ... Oscillation circuit BT ... Rechargeable battery

Claims (5)

Ultrasonic vibrating section,
A drive unit for driving the ultrasonic vibrating unit,
A controller for controlling the drive unit, a battery for supplying power to the drive unit and the control unit,
The control device is
A first battery voltage measuring unit that measures a voltage of the battery ultrasonic low There first sampling frequency Ri by the frequency of the vibration generated by the ultrasonic vibrating unit,
A battery remaining amount calculating unit that calculates the remaining amount of the battery based on the voltage of the battery measured by the first battery voltage measuring unit;
A second battery voltage measurement for measuring the voltage of the battery at a second sampling frequency higher than the first sampling frequency and higher than 1/10 of the frequency of the ultrasonic vibration generated by the ultrasonic vibration unit. Department,
Based on the voltage of the said battery, which is measured by the second battery voltage measurement unit, possess and determining malfunction determination unit malfunction the possibility of generating of the control device,
The ultrasonic cleaner, wherein the measurement of the battery voltage by the second battery voltage measurement unit and the determination by the malfunction determination unit are performed only when the ultrasonic vibration unit is driven . The ultrasonic cleaner according to claim 1 ,
The ultrasonic cleaning device, wherein the control device stops the oscillation of the ultrasonic vibrating unit when the malfunction determination unit determines that a malfunction of the control device is likely to occur. The ultrasonic cleaner according to claim 2,
When the oscillation of the ultrasonic vibration unit is stopped by the determination of the malfunction determination unit, the oscillation of the ultrasonic vibration unit is continued until the voltage of the battery measured by the first battery voltage measurement unit exceeds a predetermined value. An ultrasonic cleaner characterized in that the suspension is not released. The ultrasonic cleaner according to any one of claims 1 to 3,
Information regarding the remaining amount of the battery calculated by the remaining battery amount calculating unit and information regarding the possibility of malfunction of the control device determined by the malfunction determining unit are indicated by at least color or lighting / flashing. An ultrasonic cleaner comprising: a display unit that collectively displays the same light emitting portion by one. The ultrasonic cleaner according to any one of claims 1 to 4,
The control device includes a microcomputer,
An oscillator circuit for supplying a clock signal to the microcomputer is provided,
The ultrasonic cleaning device is characterized in that the oscillation circuit has temperature characteristics set such that the oscillation frequency is stable within a preset temperature range.

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