JP3777832B2 - Sound equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an audio apparatus having a function of automatically demonstrating the operation of the apparatus itself when connected to a commercial power source.
[0002]
[Prior art]
In recent years, when an electronic device is displayed at a storefront of a store, there are many that demonstrate the function of the device by itself to enhance the display effect. Particularly in audio equipment and the like, it is often used to appeal multiple functions. Normally, this function starts the demonstration by connecting the device to a commercial power source and turning on the power switch. When the power is turned off, the demonstration is limited to the central display unit using a fluorescent display tube.
[0003]
[Problems to be solved by the invention]
However, since there are a large number of devices on display at the store, there is no need to turn on and off the power switch of each device. When the store closes every day, the power breaker is disconnected to ensure safety, and the store opens the next day. The actual situation is that the power supply breaker is turned on and the outlets in the store are energized all at once. In this case, there was a problem that the power switch of each device had to be turned on for demonstration.
[0004]
In consideration of the actual state of equipment display in such a store, the present invention provides a sound device that can start demonstration without turning on the power switch one by one in such a situation and can enhance the display effect. Objective.
[0005]
[Means for Solving the Problems]
Structure of claim 1 of the acoustic apparatus of the present invention for achieving the above-mentioned problems, detects that it is connected to the commercial power source, a complex demonstration display when the power switch after a predetermined time is in the OFF state first and function display state, those when the power switch is in the on state, characterized in that a second function display state including demonstration display with a limited display content than the first function display states including It is.
[0006]
With this configuration, the acoustic device can effectively demonstrate itself even in a place where AC power is turned on and off collectively, such as a store or an exhibition hall.
Next, similarly, the configuration of claim 2 is characterized in that, in the configuration of claim 1 , the first or second function display state is controlled to be stopped by a display prohibition operation or another function operation. Even during the demonstration, it can be stopped immediately and returned to the required state according to the operation of the operator.
[0007]
Then also the configuration of claim 3, in the first aspect, the power switch when even if the initialization of the control unit when it is connected to the commercial power supply was cut off the connection to the previous commercial power supply The state is memorized, and even when the power is turned on / off, the operating state is memorized and the same demonstration as the previous time can be performed.
[0008]
Then also the fourth aspect, in the first aspect, when even if the initialization of the control unit when it is connected to the commercial power supply was cut off the connection to the previous commercial power supply, or the previous supply When the switch is turned off, the demonstration display prohibition state is memorized, and once it is judged that the demonstration is not necessary at the user's hand, the state is memorized and requested. Unless there is, there is an effect of not performing unnecessary demonstrations.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an acoustic device of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the acoustic device of the present invention, FIG. 2 is an external view showing the front operation unit thereof, and FIG. 3 is a flowchart for explaining the demonstration operation. In FIG. 1, a power supply transformer 1 is wound with a primary winding 1a for inputting a commercial AC voltage, for example, AC 100V, and first, second, and third secondary windings 1b, 1c, and 1d. The low-voltage AC output from the first secondary winding 1b is input to the bridge-connected diode 2 to obtain a DC output, which is stabilized by the constant voltage circuit 3.
[0010]
The + output of the constant voltage circuit 3 is divided into two, and one is connected to the VDD terminal of the microcomputer 5 via the diode 4 having the polarity shown in the figure. The microcomputer 5 can also have a function of controlling the operation of an acoustic device (not shown), and has a clock function, a timer function for operating the acoustic device at an arbitrarily set time, and the like. A backup capacitor 6 is connected between the VDD terminal and the ground to back up the state of the microcomputer 5 in the event of a power failure. The diode 4 is for preventing the electric charge from flowing out of the capacitor 6 in that case. The voltage at the VDD terminal is connected to the collector of the transistor 8 via the resistor 7, and this collector is connected to the reset (RESET) terminal of the microcomputer 5.
[0011]
The other output of the constant voltage circuit 3 is connected to the base of the transistor 8 via the capacitor 9. Further, the VDD terminal of the microcomputer 5 is connected to the A / D input terminal of the microcomputer 5 via the resistor 10 and one end of the power switch 11 whose other end is grounded. In addition, a connection point between the resistor 10 and the power switch 11 is connected via a resistor 12 to one end of an operation switch 13 whose other end is grounded. From one end of the operation switch 13, a resistor and a necessary number of switches for various operations are connected in the same manner as necessary, and finally connected to one end of the resistor 14. The other end is connected to one end of a demo ON / OFF switch 15 with the other end grounded. Although only the switches 11, 13, and 15 are shown in the figure, a necessary number of operation switches and resistors can be additionally provided between the switch 13 and the resistor 14.
[0012]
When none of the switches 11, 13, and 15 is pressed, the voltage at the VDD terminal is high, and when the power switch 11 is pressed, the voltage is low, and the voltage at the A / D input terminal is analog by the pressed switch. Changes. The microcomputer 5 converts an analog value input from the A / D input terminal into a digital value and determines input information based on the digital value.
[0013]
When the power switch 11 is turned on, the A / D terminal is grounded, and the microcomputer 5 detects that the power switch 11 is turned on. When the operation switch 13 is turned on, an analog voltage obtained by dividing the voltage of the terminal VDD by the resistors 10 and 12 is applied to the A / D input terminal of the microcomputer 5, and the operation is performed according to a value converted into a digital value. It is detected that the switch 13 is turned on. When the demo ON / OFF switch 15 is turned on, the voltage at the terminal VDD is divided between the resistor 10 and the resistors 12 and 14 and the resistor connected therebetween at the A / D input terminal of the microcomputer 5. An analog voltage is applied, and it is detected that the demo ON / OFF switch 15 is turned on by a value obtained by converting the analog voltage into a digital value.
[0014]
The LED control output (LED) terminal of the microcomputer 5 is connected to the base of the transistor 17 through the resistor 16, and the light emitting diode 18 is connected between the collector and the ground, and the collector of the transistor 17 connects the resistor 19. Is connected to the VDD terminal of the microcomputer 5, and the light emitting diode 18 is turned on when the LED terminal goes low and the collector of the transistor 17 goes high. By providing a plurality of LED control output terminals and connecting a circuit including such a transistor and a light emitting diode to them, it is possible to light up corresponding to the output of each LED control output terminal.
[0015]
The power control output (PCTRL) terminal of the microcomputer 5 is connected to the base of the transistor 21 through the resistor 20, and the collector thereof is connected to the rectified output of the diode 2 through the coil of the relay 22. A low-voltage AC voltage is applied from the second secondary winding 1c of the power transformer to the bridge-connected diode 23 via the contacts 22a and 22b of the relay 22 to be rectified to obtain a DC voltage + B, which is controlled by the microcomputer 5. It is used as a power source for an electric circuit of an acoustic device (not shown). The DC voltage + B is also converted to a constant voltage by a constant voltage diode 25 via a resistor 24 and applied to a display control circuit 26 (display control means) controlled by the microcomputer 5. Further, the third secondary winding 1d is controlled and driven by the display control circuit 26, and the contact 22c of the relay 22 is connected to the filament of the FL display tube 27, which is a centralized display unit for visually displaying characters, symbols and figures. 22d is connected.
[0016]
FIG. 2 is an external view showing the front operation unit of the sound device of the present embodiment. On the panel surface 30, a power switch button 31, an MD operation switch button 32, a tuner operation switch button 33, a CD operation switch button 34, a demonstration ON / OFF. There is a switch button 35. There is an MD eject switch button 37 in the vicinity of the MD insertion slot 36, a cassette tape operation section 39 in the vicinity of the central display section 38 using the FL display tube 27 and the LED 18, and a CD eject switch button 41 in the vicinity of the CD changer section 40. There are CD selection switch buttons 42-46. The cassette deck section 47 has a tape eject switch button 48, and a volume controller 49 is also provided on the panel surface. Each of the operation switch buttons is formed of, for example, a semi-transparent synthetic resin. If the LED 18 is arranged behind the button and the button is operated, the LED 18 emits light and can display that the operation related to the button is performed. It is a self-illuminated operation button.
[0017]
Next, the operation will be described with reference to the flowchart for explaining the demonstration operation of FIG. When a commercial AC voltage is applied to the winding 1a of the power transformer 1, the low-voltage AC of the first secondary winding 1b is rectified by the bridge-connected diode 2 and is converted to a constant voltage by the constant voltage circuit 3 to become micro voltage. The transistor 8 is turned on from the beginning by being applied to the VDD terminal of the computer 5, instantaneously applied to the base of the transistor 8 as the charging current of the capacitor 9, and applied to the collector with a slight delay, Although the collector, that is, the reset terminal is at the low level, when the charging of the capacitor 9 is completed, the transistor 8 is turned off, so that the collector, that is, the reset terminal becomes high, and the microcomputer 5 is reset (step 1).
[0018]
If the power switch 11 is not pressed in this state, the output of the power control terminal of the microcomputer 5 is low, the transistor 21 is off, the relay 22 does not operate, and the contacts 22a, 22b, 22c, and 22d are The electrical circuit of the audio equipment, the display control circuit 26, and the FL display tube 27 are not operating.
[0019]
In step 2, a 10-second downcount timer is set. In the normal case, the 10 seconds may be arbitrarily set by predicting the time that the user will turn on the power switch after connecting the AC. In step 3, it is checked whether the demo ON / OFF switch 15 is in the demo on state or the demo off state (demonstration prohibited state). If the demo is disabled, go to step 5. Otherwise, decrement the timer in step 4, and check if the timer is 0 and the demo is no longer prohibited in step 5. If the demonstration is not prohibited in 6, return to step 2 and continue counting down.
[0020]
If the demonstration is prohibited in step 6, wait for whether the power switch 11 is turned on in step 7, and if it is on, check the change of the A / D input terminal by the power switch 11 (during the previous AC input) The power control terminal becomes high and the transistor 20 is turned on and the relay 22 is operated to turn on the contacts 22a, 22b, 22c and 22d, and the display control circuit is turned on. 26, the FL display tube 27 is lit and a voltage is generated at the + B terminal. In step 8, it waits for whether the switch 13 or another operation switch is pressed. If it is pressed, a predetermined operation starts in step 9 and ends.
[0021]
If the timer is 0 in step 5 and the demonstration is not prohibited, the change in the A / D input terminal by the power switch 11 is checked in step 10; if not on, the power control terminal is set high in step 10 and the transistor 20 is turned on. The relay 22 is turned on and the contacts 22a, 22b, 22c, and 22d are turned on, the display control circuit 26 displays a complicated demonstration display on the FL display tube 27, and the LED 18 is blinked by the LED control output terminal. The function display state of 1 is started (step 11). At this time, if the operation button related to the display of the FL display tube 27 is turned on so that the operation button and the description of the operation state by the operation are synchronized, the demo effect Becomes higher.
[0022]
If the power is in the ON state in step 10, the power control terminal is set high, the transistor 20 is turned on and the relay 22 is operated to turn on the contacts 22a, 22b, 22c and 22d. A conservative display with a limited function is displayed, and the second function display state is started by limiting the blinking of the LED 18 by the LED control output terminal (step 12).
[0023]
In step 13, it is checked whether the demonstration is prohibited. If it is, in step 14, the power control terminal is set low to turn off the transistor 21, the relay 22 is disabled, and the power transformer secondary winding 1c, The voltage supply from 1d is cut off, the operation of the display control circuit 26 and the FL display tube 27 is stopped, the demonstration is stopped, and the process is terminated.
[0024]
If the demonstration is not prohibited in step 13, it is checked in step 15 whether any operation key is pressed. If not, the process returns to step 13, and if it is pressed, step 16 starts a predetermined operation. At 14, the demonstration is stopped and terminated as described above.
As described above, according to an embodiment of the present invention, even if the AC power is turned on and the power switch is not turned on, a predetermined time elapses and the demonstration prohibition (stop) switch is not pressed during that time, or If the demonstration prohibition does not remain as the previous memory, the first function display state becomes a complicated demo state, and if the power switch is turned on, the second function display state is limited and the display state is limited. A demo that matches the display status of the audio equipment at the store can be automatically performed.
[0025]
Further, as described above, when the AC power supply that has been turned on is disconnected without using the power switch, the control unit stores the state of the power switch before the AC disconnection and the demonstration prohibited state, and the demonstration is prohibited. The state is memorized even when the power switch is turned off, and if this memory is retained even at the time of initialization of the control device, the device at the time of turning on the AC power is turned on and off at the same time. The state of the power switch can be reproduced, and after reaching the user's hand, there is usually no need for a demo, so once the demo is prohibited, the power switch can be turned off and the AC power source Even if connected or disconnected, the demonstration prohibited state can be maintained and unnecessary demonstration start can be prevented.
[0026]
In the present embodiment, numerical values such as the set time of the timer when the AC power is turned on are examples, and can be set as necessary. In this embodiment, power is supplied to the acoustic circuit as well as the operation of the display circuit. However, if power saving is necessary, the acoustic circuit may be provided with another cutoff circuit. Furthermore, although the display method is described as using the FL display tube and the LED, the display device is not limited to these.
[0027]
【The invention's effect】
As described above, the acoustic device according to the present invention is effective in demonstrating itself even in a place where the AC power supply is turned on / off in a lump such as a store or an exhibition hall by the configuration of claim 1. Can be done.
Similarly, according to the configuration of the second aspect, even if the demonstration is being performed, the demonstration can be stopped according to the operation of the operator and immediately returned to a necessary state.
[0028]
Similarly, according to the third aspect of the present invention, even when the power supply is turned on / off, the operating state is stored and the same demonstration as the previous time can be performed.
Further, according to the configuration of claim 4, once it is determined that there is no need for demonstration at the user's hand, there is an effect that the state is stored and unnecessary demonstration is not performed unless requested.
[Brief description of the drawings]
FIG. 1 is a block diagram of an embodiment of an acoustic apparatus of the present invention. FIG. 2 is an external view showing the front operation unit. FIG. 3 is a flowchart for explaining the demonstration operation.
DESCRIPTION OF SYMBOLS 1 Power supply transformer 2, 20 Diode 3 Constant voltage circuit 5 Microcomputer 8, 17, 21 Transistor 10, 12, 14 Resistor 11 Power switch 13 Operation switch 15 Demo ON / OFF switch 18 LED
22 Relay 26 Display control circuit 27 FL display tube

Claims (4)

Detecting that it has been connected to the commercial power source, when the power switch after a predetermined time is off the first function display conditions including complex demonstration display, the first when the power switch is on acoustic apparatus characterized by than one function display state becomes a second function display state including demonstration display with a limited display. 2. The acoustic apparatus according to claim 1, wherein the first or second function display state is controlled to be stopped by a display prohibition operation or another function operation. Acoustic according to claim 1, wherein the state of the power switch when the cut off the connection to the previous commercial power even if the initialization of the control unit is characterized in that stored when connected to a commercial power source apparatus. When cut off the connection to the previous commercial power even if the initialization of the control unit, or demonstration display prohibition state when it is the last power switch off is stored when it is connected to the commercial power source The acoustic device according to claim 1.

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