JP2018012050A - Ultrasonic cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic cleaner in which malfunction of a micro computer can be prevented while exact residual quantity of a battery is measured.SOLUTION: A control device (102) includes: a first battery voltage measurement part (102a) which measures a voltage of a battery (BT) at a first sampling frequency considerably lower than a frequency of ultrasonic vibration generated by an ultrasonic vibration part; a battery residual quantity calculation part (102b) which calculates the residual quantity of the battery (BT) based on the voltage of the battery (BT) measured by the first battery voltage measurement part (102a); a second battery voltage measurement part (102c) which measures a voltage of the battery (BT) at a second sampling frequency higher than 1/10 of frequency of ultrasonic vibration generated by the ultrasonic vibration part; and a malfunction judgement part (102d) which judges such possibility that malfunction of the control device (102) occurs based on the voltage of the battery (BT) measured by the second battery voltage measurement part (102c).SELECTED DRAWING: Figure 8

Description

  The present invention relates to an ultrasonic cleaner.

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

Japanese Patent No. 3768978

  By the way, in the 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 measured accurately. There's a problem.

  In particular, when the ultrasonic cleaner is provided with a control microcomputer, clothing is brought into contact with the vibrating part separately from the ultrasonic oscillation during cleaning, and the load increases. There is a problem that the microcomputer is reset before the ultrasonic wave is stopped.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an ultrasonic cleaner that can prevent malfunction of a microcomputer while accurately measuring the remaining battery level.

In order to solve the above problems, the ultrasonic cleaner of the present invention is
An ultrasonic vibration part;
A drive unit for driving the ultrasonic vibration unit;
A control device for controlling the drive unit; a battery for supplying power to the drive unit and the control device;
The control device
A first battery voltage measurement unit that measures the voltage of the battery at a first sampling frequency that is much lower than the frequency of ultrasonic vibration generated by the ultrasonic vibration 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 unit that measures the voltage of the battery at a second sampling frequency that is higher than 1/10 of the frequency of ultrasonic vibration generated by the ultrasonic vibration unit;
And a malfunction determination unit for determining a possibility of malfunction of the control device based on the voltage of the battery measured by the second battery voltage measurement unit.

In the ultrasonic cleaner of one embodiment,
The malfunction determination unit determines that the possibility of malfunction of the control device is increased when the voltage of the battery measured at the second sampling frequency is equal to or lower than a preset threshold value.

In the ultrasonic cleaner of one embodiment,
The control device stops the oscillation of the ultrasonic vibration unit when the malfunction determination unit determines that the possibility of malfunction of the control device has increased.

In the ultrasonic cleaner of one embodiment,
Information relating to the remaining amount of the battery calculated by the battery remaining amount calculating unit and information relating to the possibility of malfunctioning of the control device determined by the malfunction determining unit at least of color or lighting / flashing One display unit is provided that displays the same light emission portion together.

In the ultrasonic cleaner of one embodiment,
The control device includes a microcomputer,
An oscillation circuit for supplying a clock signal to the microcomputer;
The oscillation circuit has temperature characteristics set so that the oscillation frequency is stabilized within a preset temperature range.

  As is clear from the above, according to the present invention, the remaining battery level 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. Based on the battery voltage measured at a second sampling frequency that is higher than 1/10 of the frequency of the above, the battery remaining power is accurately measured by determining the possibility of malfunction of the microcomputer. On the other hand, 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 according to a 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. 7 is a sectional view taken along line VII-VII in FIG. FIG. 8 is a circuit diagram of the ultrasonic cleaner. FIG. 9 is a diagram showing changes in the remaining battery level, battery voltage, and voltage _VIN .

  The ultrasonic cleaner of the present invention will be described in detail below with reference to the illustrated embodiments.

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

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

  The main body portion 10 is covered with a main body cover 11 and a front end side ultrasonic horn 14 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 ultrasonic horn 14 excluding the tip is covered with a tapered horn cap 13 fixed to the holder cover 12. The horn cap 13 and the ultrasonic horn 14 are spaced apart from 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. FIG. 4 shows a side view of the main body 10 of the ultrasonic cleaner. 2 to 4, the same reference numerals are assigned to the same components as those in FIG. 1.

  Further, FIG. 5 shows a top view (tip side) of the main body 10 of the ultrasonic cleaner. In FIG. 5, the same components as those in FIG.

  As shown in FIG. 5, a long hole 13 a is provided on the distal end side of the horn cap 13. The tip of a horn portion 14a (shown in FIG. 7) of the ultrasonic horn 14 protrudes 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 lower surface of the main body 10 is covered with a bottom cover 15. A push button switch 16 is attached to the center of the bottom cover 15. Furthermore, a USB (Universal Serial Bus) cover 17 is attached to one side outside the push button switch 16 of the bottom cover 15 so that it can be opened and closed.

  The push button switch 16 has an annular display portion 16a lacking in the circumferential direction, and a linear display portion 16b extending radially in the lacked portion of the annular display portion 16a. The annular display portion 16a and the linear display portion 16b are 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.

  7 shows a cross-sectional view taken along line VII-VII in FIG.

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

  On the other hand, an ultrasonic horn 14 is attached to the front end side (upper side in the figure) of the main body cover 11. The ultrasonic horn 14 has a horn portion 14a on the front end side and a base portion 14b on the rear end side, and a cross section whose cross-sectional shape is gradually flattened forward from the circular base portion 14b on the rear end side. A rectangular horn portion 14a is formed.

  The base 14 b of the ultrasonic horn 14 includes an ultrasonic transducer 40. The ultrasonic horn 14 is an example of an ultrasonic vibration unit. 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. And the horn cap 13 is attached to the front end side of the holder cover 12 so that the horn part 14a of the ultrasonic horn 14 may be enclosed.

  A packing 41 is disposed between the base 14 b of the ultrasonic horn 14 and the holder cover 12. A packing 42 is disposed 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, the ultrasonic cleaner includes a battery BT, a DC / DC converter 101, a control device 102, a drive unit 103, a switch unit 104, a display unit 105, an oscillation circuit 106, USB connector CN. In FIG. 8, description of the configuration of the circuit for turning on and off the power by the switch unit 104 is omitted.

  The control device 102 includes a microcomputer, an input / output circuit, and the like. The first battery voltage measuring unit 102a and the first battery voltage measuring unit 102a measure the voltage of the battery BT at a first sampling frequency of 10 Hz (100 msec interval). A battery remaining amount calculating unit 102b that calculates the remaining amount of the battery BT based on the voltage of the battery BT measured by the above, and a second battery voltage measuring unit 102c that measures the voltage of the battery BT at the 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 a frequency 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. The frequency is higher than the frequency of / 10. The second sampling frequency is preferably about the same as or higher than the frequency of the ultrasonic vibration, and the same frequency as the frequency of the ultrasonic vibration is the frequency of the ultrasonic vibration. On the other hand, the frequency is within a range of ± 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 converter 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 _VIN 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 5.5V of the battery BT (when the battery level is 100%) into a DC voltage 3.3V in accordance with 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. In addition, a control signal is output from the control device 102 to the display unit 105. In addition, a signal from the switch unit 104 is input to the control device 102.

  The driving unit 103 drives the ultrasonic transducer 40 in accordance with a driving signal from the control device 102. In the first embodiment, the frequency of ultrasonic vibration is 38 kHz. Note that the frequency of the ultrasonic vibration may be 30 kHz to 40 kHz suitable for washing clothes.

The oscillation circuit 106 includes 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. To the clock input terminal _CX . The oscillation signal of the oscillation circuit 106 is used as a clock signal for the microcomputer of the control device 102.

  In addition, 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 configuration, when the push button switch 16 is pressed in a state where the battery BT is sufficiently charged (battery remaining amount 100%), the power from the battery BT is supplied and the DC / DC conversion unit 101 is supplied. 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 pushbutton switch 16 are lit in white, and the ultrasonic vibrator 40 is driven and vibrated by the drive portion 103. The ultrasonic horn 14 is ultrasonically vibrated by the vibration of the ultrasonic transducer 40.

  And the dirt adhering to clothing is removed by vibration by applying the tip of horn part 14a of ultrasonic horn 14 to clothing soaked in water which is an example of a cleaning medium.

  Next, when the pushbutton switch 16 is pressed, the ultrasonic horn 14 stops the ultrasonic vibration, and the sleep mode for 15 seconds (mode in which power consumption is minimized) is set. When the push button switch 16 is pressed again for 15 seconds in the sleep mode, the ultrasonic horn 14 starts ultrasonic vibration. On the other hand, when 15 seconds have passed without the operation of 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 remaining 10%: 4.5V

FIG. 9 shows changes in the remaining battery level, battery voltage, and voltage _VIN . In FIG. 9, the upper graph shows changes in the remaining battery level and the battery voltage, and the lower graph is a voltage applied to the voltage input terminal _VIN of the control device 102, that is, converted by the DC / DC converter 101. Shows the change of 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 direct current voltage of the DC / DC conversion unit 101 rapidly decreases.

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

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

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

  When the output voltage of the battery BT becomes 3.5 V or less, the output voltage of the DC / DC conversion unit 101 rapidly 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 is 4.5 V or less before the microcomputer of the control device 102 is reset. The remaining battery level calculated by the remaining battery level calculation 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 pushbutton switch 16 are blinked 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 conversion unit 101 rapidly decreases. In particular, during the operation in which the ultrasonic horn 14 vibrates ultrasonically, the battery voltage changes up and down in accordance with the vibration, so the possibility that the microcomputer of the control device 102 will be reset increases.

  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 4.5V (remaining battery power). When the amount is 10% or less, the malfunction determination unit 102d of the control device 102 determines that there is a possibility of malfunction of the microcomputer, and immediately stops the oscillation of the ultrasonic horn 14.

  When it is determined by the malfunction determination unit 102d of the control device 102 that there is a possibility of malfunction of the microcomputer, and the oscillation of the ultrasonic horn 14 is stopped, the annular display unit 16a of the pushbutton switch 16 is linearly formed. The display unit 16b blinks in orange.

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

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

  The display when the malfunction determination unit 102d determines that a malfunction of the microcomputer may occur is different from the blinking of the annular display unit 16a and the linear display unit 16b of the pushbutton switch 16 in orange. You may make it display by the display part. Thereby, the user can distinguish whether the remaining battery level is 10% or less or whether it is determined that the malfunction of the microcomputer may occur.

  In the ultrasonic cleaner having the above configuration, the remaining battery level calculation unit 102b calculates the remaining battery level 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 an interval of 100 msec (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 using a predetermined table (or formula). Use to calculate.

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

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

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

  Thereby, according to the said ultrasonic cleaner, malfunctioning of a microcomputer can be prevented, measuring the remaining battery amount correctly.

  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 determination unit 102d may cause malfunction of the microcomputer. Is determined to be higher. At this time, by setting the threshold value to a value higher than the malfunctioning voltage of the microcomputer by a predetermined voltage, before the malfunction of the microcomputer occurs, it is detected that the possibility of malfunctioning is increased, The oscillation of the ultrasonic horn 14 can be stopped.

  In addition, when the malfunction determination unit 102d determines that the possibility of malfunction of the microcomputer has increased, the microcomputer stops the oscillation of the ultrasonic horn 14 so that the clothing comes into contact with the vibrating part during cleaning. Even if the voltage of the battery BT drops sharply due to an increase in the load, it is possible to prevent the microcomputer from being reset than by stopping the ultrasonic wave.

  In addition, information relating to the remaining amount of the battery BT calculated by the battery remaining amount calculation unit 102b and information relating to the possibility of malfunction of the microcomputer determined by the malfunction determination unit 102d are displayed in color or lighting / flashing. Since the same light emitting part is collectively displayed on the display unit 105 by at least one of the above, the structure of the display unit 105 can be simplified and miniaturized by combining the display of the remaining battery level and the operation display of the microcomputer. it can.

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

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

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

  As a result, the optimum oscillation frequency set in advance in accordance with the ultrasonic horn 14 (ultrasonic vibration unit) whose vibration resonance point is structurally determined is suppressed from shifting due to temperature change. It can be prevented that the frequency is changed, the output of the ultrasonic vibration is lowered, and the cleaning ability is lowered.

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

[Third Embodiment]
In the first and second embodiments, the ultrasonic cleaning device including the ultrasonic horn 14 (ultrasonic vibration unit) has been described. However, the ultrasonic cleaning device is not limited to the ultrasonic vibration unit, and includes a vibration unit 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 made within the scope of the present invention. For example, what combined suitably the content described in the said 1st, 2nd embodiment is good also as one Embodiment of this invention.

  The present invention and the embodiment are summarized as follows.

In order to solve the above problems, the ultrasonic cleaner of the present invention is
An ultrasonic vibration unit 14;
A drive unit 103 for driving the ultrasonic vibration unit 14;
A control device 102 that controls the drive unit 103; a drive unit 103; and a battery BT that supplies power to the control device 102;
The control device 102
A first battery voltage measurement unit 102a that measures the voltage of the battery BT at a first sampling frequency that is much lower than the frequency of ultrasonic vibration generated by the ultrasonic vibration unit 14,
A battery remaining amount calculating unit 102b for calculating the remaining amount of the battery BT based on the voltage of the battery BT measured by the first battery voltage measuring unit 102a;
A second battery voltage measuring unit 102c that measures the voltage of the battery BT at a second sampling frequency higher than the frequency of 1/10 of the frequency of ultrasonic vibration generated by the ultrasonic vibration unit 14,
And a malfunction determination unit 102d that determines the 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 level is determined based on the voltage of the battery BT measured by the first battery voltage measurement unit 102a at the first sampling frequency that is much lower than the frequency of the ultrasonic vibration generated by the ultrasonic vibration unit 14. The amount calculation unit 102b calculates the remaining amount of the battery BT, while the second battery voltage measurement unit 102c has a second sampling frequency that is higher than 1/10 of the frequency of the ultrasonic vibration generated by the ultrasonic vibration unit 14. Based on the voltage of the battery BT measured by the above, the malfunction determination unit 102d determines the possibility of malfunction of the control device 102. Thereby, it is possible to prevent malfunction of the control device 102 while accurately measuring the remaining battery level. According to the above, the second sampling frequency is higher than the frequency of 1/10 of the frequency of the ultrasonic vibration generated by the ultrasonic vibration unit 14, for example, approximately 1/4 of the frequency of the ultrasonic vibration. It may be 10 kHz.

In the ultrasonic cleaner of one embodiment,
The malfunction determination unit 102d determines that the possibility of malfunction of the control device 102 is increased 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 embodiment, when the voltage of the battery BT measured at the second sampling frequency is equal to or lower than a preset threshold, the malfunction determination unit 102d has a higher possibility of malfunction of the control device 102. judge. At this time, by setting the threshold value to a value higher by a predetermined voltage than the malfunctioning voltage of the control device 102, it is detected that the possibility of malfunctioning is increased before the malfunctioning of the control device 102 occurs. Thus, for example, the oscillation of the ultrasonic vibration unit 14 can be stopped.

In the ultrasonic cleaner of one embodiment,
The control device 102 stops the oscillation of the ultrasonic vibration unit 14 when the malfunction determination unit 102d determines that the possibility of malfunction of the control device 102 has increased.

  According to the above-described embodiment, when the malfunction determination unit 102d determines that the possibility of malfunction of the control device 102 has increased, the control device 102 stops the oscillation of the ultrasonic vibration unit 14 during cleaning. Even if the battery voltage suddenly drops due to the contact of clothes with the vibrating part and the load increasing, resetting of the microcomputer can be prevented rather than stopping the ultrasonic wave.

In the ultrasonic cleaner of one embodiment,
Information relating to the remaining amount of the battery BT calculated by the remaining battery amount calculation unit 102b and information relating to the possibility of malfunction of the control device 102 determined by the malfunction determination unit 102d are displayed in color or lighting. A display unit 105 is provided that displays the same light emitting portion collectively by at least one of blinking.

  According to the embodiment, the information related to the remaining amount of the battery BT calculated by the battery remaining amount calculation unit 102b and the information related to the possibility that the malfunction of the control device 102 determined by the malfunction determination unit 102d occurs. Since the same light emitting part is displayed on the display unit 105 by at least one of color and lighting / flashing, the display unit 105 can be simplified by combining the display of the remaining battery level and the operation of the microcomputer. And downsizing.

In the ultrasonic cleaner of one embodiment,
The control device 102 includes a microcomputer,
An oscillation circuit 106 for supplying a clock signal to the microcomputer;
The oscillation circuit 106 has temperature characteristics set so that the oscillation frequency is stabilized within a preset temperature range.

  According to the above embodiment, the clock signal supplied from the oscillation circuit 106 to the microcomputer of the control device 102 is stabilized, so that the frequency of the drive signal output from the microcomputer to the drive unit 103 is stabilized based on this clock signal. As a result, the optimum oscillation frequency set in accordance with the ultrasonic vibration unit 14 in which the resonance point to be oscillated is structurally determined is prevented from shifting due to a temperature change. Therefore, it can be prevented that the oscillation frequency of the oscillation circuit 106 is changed and the output of the ultrasonic vibration is lowered and the cleaning ability is lowered.

DESCRIPTION OF SYMBOLS 10 ... Main body part 11 ... Main body cover 12 ... Holder cover 13 ... Horn cap 14 ... Ultrasonic horn (ultrasonic vibration part)
DESCRIPTION OF SYMBOLS 15 ... Bottom cover 16 ... Pushbutton switch 16a ... Annular display part 16b ... Linear display part 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 ... Drive unit 104 ... Switch unit 105 ... Display unit 106 ... Oscillator circuit BT ... rechargeable battery

Claims (5)

An ultrasonic vibration part;
A drive unit for driving the ultrasonic vibration unit;
A control device for controlling the drive unit; a battery for supplying power to the drive unit and the control device;
The control device
A first battery voltage measurement unit that measures the voltage of the battery at a first sampling frequency that is much lower than the frequency of ultrasonic vibration generated by the ultrasonic vibration 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 unit that measures the voltage of the battery at a second sampling frequency that is higher than 1/10 of the frequency of ultrasonic vibration generated by the ultrasonic vibration unit;
An ultrasonic cleaner, comprising: a malfunction determination unit that determines a possibility of malfunction of the control device based on the voltage of the battery measured by the second battery voltage measurement unit. The ultrasonic cleaner according to claim 1,
The malfunction determination unit determines that the possibility of malfunction of the control device is increased when the voltage of the battery measured at the second sampling frequency is equal to or lower than a preset threshold value. Ultrasonic cleaner to do. The ultrasonic cleaner according to claim 1 or 2,
The ultrasonic cleaning device according to claim 1, wherein the control device stops the oscillation of the ultrasonic vibration unit when the malfunction determination unit determines that the possibility of malfunction of the control device is increased. In the ultrasonic cleaning device according to any one of claims 1 to 3,
Information relating to the remaining amount of the battery calculated by the battery remaining amount calculating unit and information relating to the possibility of malfunctioning of the control device determined by the malfunction determining unit at least of color or lighting / flashing An ultrasonic cleaning device comprising a display unit that collectively displays the same light emitting portion by one. In the ultrasonic cleaning device according to any one of claims 1 to 4,
The control device includes a microcomputer,
An oscillation circuit for supplying a clock signal to the microcomputer;
The ultrasonic cleaning device, wherein the oscillation circuit has temperature characteristics set so that the oscillation frequency is stabilized within a preset temperature range.

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