JPH0319748B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Applicability The present invention relates to an answering machine having a call recording function.

(b) Prior art Answering machines with a call recording function have been known in the past, but in such devices, when performing a call recording operation, the function of recording mutual conversations is required. Operations were performed by turning on and off buttons.

(c) Problems to be Solved by the Invention In the prior art as described above, it was not possible to efficiently use the limited amount of tape. This is because even if you finish recording a call, the tape will continue to be driven to its end point unless you forget to turn off the call recording switch.

(d) Means for Solving the Problems In order to solve the above-mentioned problems, the present invention uses a timer button that operates for a predetermined time by pressing once. The problem is solved by using the tape efficiently by driving the tape for a certain number of times, and by pressing the same button several times in advance, the timer is driven for a certain number of times. This is what I am trying to do.

(e) Examples The structural function of the present invention will be explained below.

In FIG. 1, L1 and L2 are telephone lines, LT is a line transformer, and 1 is a call recording button, which drives the recording mechanism in proportion to the number of times it is pressed (with a limit), as will be described later. 2 is an up-down counter, where is an up-count input terminal, is a down-count input terminal,
CLEAR is a clear terminal, Q0 to Q3 are parallel output terminals for count values. Further, 3 is a 20 second timer, which outputs an L level signal at 20 second intervals while the input terminal is at L level. Further, 4 is a multivibrator that outputs an oscillation output of about 2 Hz, 5 is an amplification circuit, 6 is a constant current circuit, 7 is a high frequency bias circuit, 8 is a solenoid for driving the tape (not shown), M is a motor, RPH
-2 is a recording/reproducing head, and EH-2 is an erasing head. In addition, various gate ICs such as inverters and NAND gates as shown are used.

Next, we will discuss its specific effects.

When the device is powered on, the output of the inverter G-6 becomes H level while the capacitor C2 is charged to a predetermined value via the resistor R1 and the diode D1, and the counter 2 is cleared via the CLEAR terminal. Therefore, the count value is zero. Also, due to the action of capacitor C4, NAND gate G
Since input terminal a of G-9 is at L level and input terminal b of G-9 is at L level due to the output of Schmitt circuit G-1, the output of G-9 is at H level, and this output is the input of NOR gate G-8. Since it is applied to terminal b, the output of G-8 becomes L level, the base current of transistor TR-1 does not flow, and the load relay Y-2 is off. In this state, if there is an incoming call from outside, or the telephone TEL is taken off-hook to make a call, the two parties are in a conversation state, and if they wish to record this conversation, press call recording button 1. This first press of button 1 causes resistance R2 to
After the chattering is removed by capacitor C1, the input terminal side of Schmitt circuit G-1 becomes L level, and the output of Schmitt circuit G-2 becomes L level, so counter 2 starts counting via the count input terminal of counter 2. The number becomes “1”. Here, the output terminals of counter 2 “Q3, Q
2, Q1, Q0" becomes "0001", the NAND gate G-10 is activated, and outputs H and L level signals corresponding to the frequency of 2 Hz of the multivibrator 4 to its output c. Also, since each input terminal b, c, and d of NAND gate G-11 is at L level,
When the L level output of G-11 is applied to the terminal a of G-11, the output e of G-11 becomes H level and turns on the light emitting diode LED via the inverter G-12. As a result, when the count number of counter 2 is "1", the light emitting diode LED is activated according to the cycle of multivibrator 4.
flashes. This allows confirmation that the counter 2 is operating normally. Now, as mentioned above, when you press call recording button 1 for the first time,
The output of Schmitt circuit G-1 becomes H level,
The input terminal b of the above-mentioned NAND gate G-9 is raised from L level to H level, and its output c is raised from H level to L level. Therefore, the output of NOR gate G-8 changes from L to H level, turning on transistor TR-1 and turning on relay Y-2, which closes its contact y2-1.
to connect the line transformer LT to the telephone line.
Further, since the motor M and the solenoid 8 are turned on by another contact y2-2, a recording tape (not shown) is driven, and power is also supplied to the high frequency bias 7. Therefore, mutual conversation is transmitted to the recording/playback head RPH-2 via the line transformer LT, amplification circuit 5, and constant current circuit 6.
reached and recorded on tape.

On the other hand, even if the first press of the above-mentioned call recording button 1 is released, the input terminal a of the NAND gate G-9 remains at H level, so the input terminal b of the NAND gate G-9 remains at the H level.
is then relay Y regardless of the H or L level.
-2 is retained. For example, call recording button 2
If you press 5 times, the count number of counter 2 will be 5.
Therefore, in this example, 5 times×
20 seconds = 100 seconds and 100 seconds of call recording is possible.
That is, when the output terminal c of the NAND gate G-9 as described above is held at L level, the NAND gate G-5
input terminal of 20 second timer 3 via input terminal b of
Hold IN at L level. This 20 second timer uses a multivibrator in this embodiment, but in order to increase the hardness, it is desirable to use a combination of a ceramic oscillator and a frequency dividing circuit. In any case, it outputs an L level pulse every 20 seconds. This pulse is applied to the count input terminal via NAND gate G-3 and inverter G-4, and is counted down by -1 every 20 seconds. When the count reaches 1, the light emitting diode LED will turn on, just like when you press the call recording button 1 above.
flashes. As is clear from the figure, this LED blinks only when the count number is 1. Therefore, the blinking of the LED continues for 20 seconds. If you want to continue recording the call, press the call recording button 1 a predetermined number of times to extend the recording time.
When the count reaches 1 or more, the LED will stop blinking.

Now, when the above count number reaches zero, the terminal goes from H to L level, so the inverter G
-7, transistor via OR gate G-8
Cut the bias to TR-1, turn off relay Y-2, and cancel the above-mentioned call recording. At the same time, counter 2 is cleared via diode D2 to return each circuit to the same state as when the power was turned on.

Also, when button 1 is pressed continuously for 2 seconds, capacitor C2 is connected via resistors R6 and R5.
You can also clear the counter by discharging the charge. This operation can eliminate waste of tape.

Next, the circuit diagram of FIG. 2 using a CPU (one-chip microprocessor) according to the second embodiment will be explained with reference to the flowcharts of FIGS. 3 and 4. In FIG. 2, parts having the same functions as those in FIG. 1 are given the same names. The CPU used in this example is Intel's 8048, and the call recording button 1 is the data bus terminal 1.
When the button is pressed, an interrupt is sent to the CPU via the OR gate 20 and the interrupt terminal.
Other operation buttons are also connected to the OR gate 20, but they are omitted because they are not directly related to the present invention. Further, 21 to 24 are drivers. Now, when the telephone enters a talking state due to an incoming or outgoing call operation, and if it is desired to record the mutual conversation on a recording tape, the call recording button 1 is pressed in the same way as in the first embodiment. At this point, an interrupt occurs and the program jumps to the call recording routine as shown in FIG.
FIG. 4 shows this call recording routine. First, in step 400, a test is performed to see if the value of the register R7 is "0". Here, register R7 is used as a counter and is cleared when the power is turned on, so the next step is
Move to 402. In steps 402 to 404, the motor M, solenoid 8, and relay Y-2 are turned on, so that the recording mechanism is operated in the same way as described in the first embodiment, and it becomes possible to record mutual conversations. In the next step 405, the value of the register R7 is +
Increment by 1. Therefore, call recording button 1
The value of register R7 becomes “1” by the first press of
(decimal, same below). In the next step 406, a test is performed to see if the value of register R7 is greater than "15" (described later). If it is less than "15", the process moves to step 407 and a 20 second timer is set by the program. In the next step 408, the value of the counter in the first embodiment is "1".
In the same way as in the case of , a test is performed to see if the value of register R7 is "1", and if it is "1", the light emitting diode is turned off in steps 409 to 412.
Flash the LED. Since one second elapses with one blink, this is repeated 20 times, and a test is performed in step 413 to see if 20 seconds have elapsed. The LED blinks repeatedly until 20 seconds have passed. As described in the first embodiment, if you want to set the recording time to 100 seconds, for example, press the call recording button 1 five times in succession. Therefore, since the next press is performed after the LED starts blinking, the program returns to step 400 due to the interrupt caused by the next press. Since the value of register R7 is ``1'', it is time to step from step 400.
When proceeding to step 405 via step 401, the value of register R7 becomes "2". Further step 406
After resetting the 20 second timer in step 407, the process moves to step 408. In this step 408, the value of register R7 is 2.
Therefore, the result is negative and the process moves to step 418.
This is also negative, and the process moves to step 419.
The process moves to step 421, which is also negative. In step 421, there is a delay of one second, but if the call recording button is pressed, for example, five times in succession, the process normally returns to step 400 by an interrupt before the one second process in step 421 is completed. Regardless of whether the speed at which the call recording button 1 is pressed is fast or slow, step 405 is always passed, so the value of the register R7 used as a counter is surely incremented by +1 and becomes "5". If the value of register R7 is "5", step 408;
The loop is repeated through steps 418, 419, 421, 413 and back to step 408. Therefore, 1 second in step 421 is subtracted from the 20 second timer, and when 20 seconds have elapsed, the process moves from step 413 to step 414, and the value of register R7 is decremented by -1.
Then reset the 20 second timer (step 415)
Then return to step 408. When 80 seconds have elapsed and the value of register R7 becomes "1", the process moves from step 408 to step 409.
The light emitting diode LED is blinked in steps 409 to 412, and this is repeated in step 413 until 20 seconds have elapsed. After 20 seconds, step
When the value of register R7 becomes "0" at 414, steps 415 (no effect this time), 408, 418,
The motor, solenoid, and relay Y-2 are turned off via 422, 423, and 424 to cancel the recording function and exit from this routine. If the above LED is blinking,
If you want to extend the recording time further, press call recording button 1.
By pressing again a predetermined number of times, the recording time can be extended in proportion to the number of times the button is pressed. Also, if the value of register R7 becomes "1" or more, the LED
stops blinking.

On the other hand, if the call recording button is pressed 15 times or more, the process moves from step 406 to step 416, and register R7 is pressed to avoid wasting the tape.
For example, the maximum value of is limited to "15" (step 416). In this case, the LED lights up continuously (step 417), and the value of register R7 reaches "14" after 20 seconds. The LED is turned off at times (steps 419 and 420). Although such a function can be provided by connecting an AND gate to the outputs of Q0 to Q3 in the circuit shown in FIG. 1, it is omitted in FIG. 1 because it would complicate the overall circuit diagram.

Also, in the second embodiment using the CPU, as in the first embodiment, in order to avoid wasting the recording tape, the recording operation can be canceled by continuously pressing the call recording button for 2 seconds or more. . This is possible by adding steps 500-503 in FIG. 5 to the flowchart in FIG.
At step 500, the CPU interrupt pin is “0”
(L level). This terminal
When INT continues for 2 seconds in steps 501 and 502, the value of register R7 is cleared to "0" in step 503, and then the process proceeds to step 422 described above, and the recording function is canceled.

(F) Effects of the Invention As described above, the present invention provides a conventional answering machine having a call recording function, in which the operation button for call recording is linked with a timer function in order to efficiently utilize the tape. Moreover, by pressing the button a predetermined number of times first, it is possible to preset a predetermined number of times in one time, and when the set time is about to time out, an alarm is issued. In particular, the next timer set is made, and in this way the limited tape can be used efficiently, and its practical effects are great.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram of the present invention, Fig. 2 is a circuit diagram of Fig. 1 converted into a microcomputer, and Fig. 3 is a circuit diagram of the second embodiment.
FIG. 4 is a flowchart following FIG. 3, and FIG. 5 is a flowchart showing a reset means using an interrupt.

Claims (1)

[Scope of Claims] 1. An answering machine having a call recording function, comprising: a push-button operation means that is pressed when recording a call; and a push button of the push-button operation means that is cleared to zero when the power is turned on and is pressed once. counter means that counts up each time the push button is pressed; means that operates when the push button is pressed once and drives a call recorder that records the call; and means that starts operating when the push button is pressed and operates for a predetermined time timer means that outputs a signal to cause the counter means to count down each time lapses; and means for driving the call recorder and stopping the operation of the timer means when the count value of the counter means becomes zero. An answering machine having a call recording function, which is equipped with the following. 2. An answering machine having a call recording function as set forth in claim 1, further comprising a display means for displaying a blinking display when the count value of the counter means is "1". 3. When the counted value of the counter means is a predetermined set value, the counter means does not count up even if the push button is pressed.
An answering machine having a call recording function according to item 1 or 2. 4. The telephone call recording according to claim 1, 2 or 3, further comprising means for clearing the counter means to zero when the push button switch is continuously pressed for a set predetermined period of time. A functional answering machine.