JPH02246736A - Charging equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a charging device, and particularly to one that notifies charging status. [Prior Art J] Conventionally, this type of charging device generally displays a visual display corresponding to the detected charging state using a display element such as an LED or a liquid crystal. However, with visual display methods, it is necessary to always pay attention to the display area, but charging generally takes a long time, and important displays may be overlooked, resulting in overcharging. It is not easy to use, as there is a risk of To address this inconvenience, it has been proposed to change the volume or sound quality of the buzzer to multiple stages, or to make it possible to distinguish and notify various stages of the charging state by using multiple types of words created by voice synthesis. [Issues to be solved by the invention 1fll However, during charging, fluctuations in the rechargeable battery voltage due to the charging current are unavoidable, and when such voltage is used to sound a buzzer, it is not possible to distinguish and display changes in volume or sound quality. When displayed using voice synthesis, the generated voice sounds wavy and the display quality is poor. To solve this problem, it is possible to equip the power supply for the display with a constant voltage circuit, but if the charging device is an inverter or a switching regulator type, the spike voltage that occurs when the switching element starts conducting will generate noise, and this Problems still remain, such as noise being superimposed on the pronunciation display, making it difficult to hear the displayed content itself. The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a charging device that enables pronunciation display with excellent display quality.

[Means to solve the problem]

As shown in the basic configuration of FIG. 1, the charging device according to the present invention includes a charging means that steps down a commercial AC voltage to form a predetermined charging voltage, and at least detects the state of charge of a rechargeable battery by the charging means. The battery pack includes charging state detection means that generates a predetermined signal, and sound generation means that produces a display corresponding to the detection signal output from the detection means. Furthermore, the present invention is characterized in that charging of the rechargeable battery by the charging means is limited or stopped at least during the sound generation operation by the above-mentioned sound generation means. As the charging means, one equipped with an inverter circuit that converts the rectified voltage into an alternating current sufficiently higher than the commercial frequency and steps down the voltage can be used, and in conjunction with the sound generation operation of the sound generation means, the oscillation in the inverter circuit is suppressed. It can be configured to stop. Further, the charging means may be provided with a switching element on the primary side of the transformer and a rectifier circuit on the secondary side, and the switching element may be turned off in conjunction with the sound generation operation. [Function] With the above configuration, when a commercial AC voltage is applied to the input steel with the rechargeable battery connected to the output side of the charging means, the input voltage is converted to a predetermined charging voltage by the charging means, and the rechargeable battery is charged. will be carried out. When the charging progresses and the battery reaches a fully charged state, the charging state detecting means detects this state and sends a detection signal to the sounding means. Then, the sounding means starts displaying a voice corresponding to the content detected by the detecting means, for example, "Charging has been completed." At the same time, a signal is sent to the charging means to limit or stop the charging operation by the charging means, thereby preventing fluctuations in the rechargeable battery voltage or noise caused by the charging operation, so that the sounding means can operate normally. It is carried out in [Example J] The present invention will be described below using an example in which the present invention is implemented in an electric shaver shown in Figs. It goes without saying that the present invention can be implemented in substantially the same way for an electric device or a charging device alone. As shown in the external appearance in FIG. 2, the electric shaver l embodying the present invention has an outer cutter 3 and a
The main switch 5 is provided on the front side of the main body case 2, and the power plug 6 for charging is provided at the lower part of the main body case 2. An electric circuit shown in FIG. 3 is housed inside 2. The electric circuit uses a rechargeable battery 7 such as a nickel-cadmium battery as a power source, and by supplying power from the rechargeable battery 7 to the motor 8 via the main switch 5, the inner blade 4 connected to the motor 8 is reciprocated and electricity is generated. It is designed to perform basic operations as a remote controller. In addition to the above-described basic configuration, the electric shaver 1 embodying the present invention has the following features:
A charging unit 10 that enables motor drive by a motor 8
A motor control section 11 that controls the applied voltage to keep the rotational speed of the motor 8 constant; a detection section 12 that detects the state of each section and generates a signal corresponding to the detected content; and an output from the detection section 12. The display unit 13 is provided with a display section 13 that performs a display corresponding to the signal received. The charging unit 10 is configured to once rectify the commercial AC voltage 9 input from the power plug 6 using a rectifier circuit 14 and then step down the voltage to a predetermined charging voltage using an inverter circuit 15. A charging state detection circuit 20 constantly monitors the charging state during charging and generates a predetermined detection signal in response to the progress of charging. Further, when the detection circuit 20 detects that charging is completed, the oscillation operation of the inverter circuit 15 is restricted to prevent overcharging of the rechargeable battery 7. The signal outputted from the detection circuit 20 is simultaneously sent to the display unit 13, and a display corresponding to the progress of the charging state is displayed. Furthermore, the detection unit 12 is equipped with a circuit 21 that detects the discharge state of the rechargeable battery 7, and monitors the terminal voltage of the rechargeable battery 7. When the terminal voltage of the rechargeable battery 7 falls below a set value, a signal is displayed on the display unit 13. to indicate that charging is required. On the other hand, the rotational speed of the motor 8 is monitored by the motor rotational state detection circuit 22, and the detection circuit 22 detects that the rotational speed has significantly deviated from the specified value due to fluctuations in brightness or a drop in battery voltage. Then, a signal is sent to the motor control unit 11, and the motor voltage is controlled by IJJ to maintain the rotational speed constant. At the same time, a signal is sent to the display section 13 to notify the control state of the motor rotation. The display section 13, as shown in FIG. ) 30, and a data storage unit 31 that stores data corresponding to a series of sounds to be displayed.
, an audio synthesis circuit 32 that synthesizes an audio signal from data retrieved from the data storage section 31, and an output circuit 33 that converts the synthesized audio signal into a predetermined sound wave and outputs it. The microprocessor 30 is a central processing unit fl (CPU)
, ROM or RAM, and operates according to the program stored in the )t OM,
Power is supplied from the rechargeable battery 7, and it normally operates in a power-saving standby mode that waits only for signal input from the detection unit 12, but when a detection signal is input from the detection unit 12, the type of detection signal is detected. After checking and performing predetermined processing corresponding to the type, such as slow rat processing, the type of speech data to be synthesized is specified in the speech synthesis circuit 32, and at the same time, a signal is sent to the output circuit 33 to turn on the output circuit 33. let The data storage section 31 stores data corresponding to a series of voices such as "Please charge" that should be pronounced and displayed by the output circuit 33.
Data is appropriately extracted from the data storage section 31 based on the data sent from the data storage section 31, and the extracted data is synthesized into a predetermined audio signal and then sequentially sent to the output circuit 33. tB power open circuit 33, filter circuit 34 that removes the W1 frequency component from the audio signal, and circuit 3 that power amplifies the audio signal.
The tvJl!
9!1 The circuit 35 is always turned off by the switching circuit 37 to reduce the power consumption of the electric shaver as a whole as much as possible, and the switching circuit 118, in which a significant detection signal is input from the detection unit 12 to the MPU 30, is turned off at all times. 37 M l)
A signal is sent from the IJ 30 so that a predetermined sound generation operation can be performed. In addition to the above configuration, the present invention is characterized by having a configuration that stops oscillation in the inverter 1 [11 path 15] when the display unit 13 displays sound generation while the charging unit 1O is in operation. That is, the signal applied from the MPU 30 to the switching circuit n37 is simultaneously applied to the inverter circuit 15 of the charging section 10, and the base end of the transistor 23 provided as a switching element in the inverter circuit 15 is grounded by this signal. It is possible to stop the oscillation of the inverter circuit 15. Therefore, prior to the display operation on the display section 13, the charging voltage output from the charging section 1O is stopped, and the display section 13 is driven with a stable voltage from only the rechargeable battery 7. FIG. PjS5 shows an example in which the present invention is implemented in a transformer-type charging device.
It is equipped with a switching element 41 such as SIRISK that controls input power, and is equipped with a full-wave rectifier surface 842 on the secondary side of the transformer 40, so that charging current can be supplied to the rechargeable battery 7. Furthermore, the rechargeable battery 7 is provided with a detection unit 12 equipped with a means for measuring charging time such as a timer, or a means for measuring the temperature, internal pressure, or terminal voltage of the battery, and is capable of generating a signal corresponding to the progress state of charging. shall be. Such a signal is input to the display section 13 equipped with a voice synthesis circuit, and at the same time is applied to the switching element 41 to regulate the on/off timing of the switching element 41 and limit the charging current to the rechargeable battery 7. Furthermore, an off signal is applied to the switching element 41 in response to the sound generation on the display section 13, and the primary steel of the transformer 40 is forcibly opened, thereby stopping the charging operation of the rechargeable battery 7. FIG. 6 shows still another embodiment, in which a rechargeable battery 7 is detachably used for charging only, and the display section 13 is configured to be driven by a power supply section 43 provided separately from the charging section IO. ing. Therefore, at the same time as the main switch 5 is turned on, the display section 13 starts and audibly displays a predetermined warning required before charging. Furthermore, each time charging progresses and reaches a predetermined state of charge, the detection unit 12 performs a detection operation, and the display unit 13 displays a state corresponding to the detected content for a short time, but during this time, the switching element 41 is turned off. This temporarily stops charging and prevents the noise signal generated from the M element when the switching element 41 is charging the battery from being input to the display section 13' via the power supply section 43. [Effects of the Invention] As described above, the present invention is configured to forcibly limit or stop the charging operation of the rechargeable battery by the charging means when the sound is displayed by the sound generating means, so that the battery voltage accompanying the charging operation is reduced. Fluctuations or noise generation are prevented, and it is possible to display the state of charge with excellent display quality.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing the basic structure of the present invention and shows an example of implementation, Fig. 2 is a perspective view showing the external shape, Fig. 3 is a block diagram showing the overall structure of the electric circuit, and Fig. 4 FIG. 2 is a block diagram showing the configuration of a display section. 5... Main switch, 7... Rechargeable battery, 9...
...Commercial AC voltage, 10...Charging part, 12...
Detection unit, 13... Display unit, 15... Inverter enclosure, 20... Charging state! Detection circuit. Figure 5

Claims (1)

[Claims] 1. A charging means that steps down a commercial AC voltage (9) to form a predetermined charging voltage; and at least detects the charging state of the rechargeable battery (7) by the charging means and outputs a predetermined signal. and a sounding means for displaying a display corresponding to the detection signal output from the sensing means, and at least during the sounding operation of the sounding means, charging of the rechargeable battery (7) by the charging means is restricted or stopped. A charging device characterized by: 2. The charging means includes an inverter circuit (15), and in conjunction with the sound generation operation by the sound generation means, the inverter circuit (15)
The charging device according to claim 1, wherein the oscillation operation in the charging device is stopped. 3. The charging means includes a switching element (41) on the primary side of the transformer (40), and a rectifier circuit (41) on the secondary side.
2), the switching element (
41) The charging device according to claim 1, wherein the charging device turns off.