JPS6225748Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a volume setting switch circuit for a watch having a volume setting switch.

As conventional clock alarm volume setting switches, rotary or sliding switches made of variable resistors have been most widely used.

An example of a timepiece using a rotary switch or the like as a volume setting switch for the clock notification sound will be described with reference to FIG.

1 is an oscillator; 2 is a frequency divider that appropriately divides the output signal from the oscillator 1 and outputs a 1 Hz signal; 3 is a waveform shaping circuit that shapes the waveform of the signal from the frequency divider 2 to drive the motor 4; 5 is a wheel train driven by the motor 4, and 6 is a pointer driven by the wheel train 5.

Reference numeral 7 denotes a melody signal generation circuit, which is activated by a signal from a reference mechanism 8 or by operation of a monitor switch 9, which outputs a signal when the current time coincides with a time arbitrarily determined by the user or a predetermined time. It is something to do.

This melody signal generation circuit 7 includes a ROM 10 that stores a melody as a notification sound, and a ROM 10 that stores a melody as a notification sound.
It consists of an address counter 11 for reading out the melody stored in 0, a program frequency divider 12 for converting the data signal from the ROM 10 into a melody signal, and a group of gates.

Assuming that an H level signal is output from the chattering prevention circuit 14 due to the action of the ring stop switch 13 and the AND gate 13 is in the open state, the output signal from the reference mechanism 8 passes through the AND gate 15 and the OR gate 16 to generate a melody signal. When the signal is applied to the generation circuit 7, the melody signal generation circuit 7 is activated.

The melody signal generation circuit 7 also operates when the monitor switch 9 is operated and a signal is applied to the melody signal generation circuit 7 via the chattering prevention circuit 17 and the OR gate 16.

Reference numeral 18 denotes a volume setting switch made of a variable resistor, which is composed of an external operating member, such as a rotary switch.

The melody signal output from the melody signal generation circuit 7 passes through the volume setting switch 18 and is applied to the sound generation circuit 19. At this time, if the resistance value of the volume setting switch 18 is changed, the sound generation circuit 19
It is possible to change the volume of the emitted sound. If a volume setting switch made of a variable resistor is used in this way, (a) the cost of the switch itself is high, causing an increase in the cost of the entire watch;

(b) The switch has 3 wiring terminals, and
Since two IC pins are required, the area occupied by these pins becomes large, leading to a change in the IC placement position and an increase in the cost of the IC.

(c) Since it is a mechanical sliding contact, chemical changes may occur in the contact part due to long-term use, making contact failure likely to occur. Such problems were occurring.

For this reason, in the past, in order to solve the above-mentioned problems and to make the volume setting operation easier, a technique as disclosed in, for example, Japanese Patent Laid-Open No. 53-93065 has been proposed. This system changes the volume of the notification sound step by step using an operation signal from a volume selection switch, which is a monostable switch, and also allows the volume to be monitored at the same time by forcibly generating the notification sound. be.

In conventional watches like this, it is possible to monitor the notification sound of the selected volume by operating the volume selection switch, which may seem very useful at first glance, but it is possible to monitor the notification sound of the selected volume by operating the volume selection switch. Then, the pulse signal is immediately applied to the volume selection signal generation circuit and the volume selection signal is switched, so that the currently selected volume is immediately switched. Therefore, each time you monitor the volume, the currently selected volume changes, and in order to monitor the currently selected volume, you have to operate the volume selection switch several times to return the volume selection signal to its original state. I had to go back to . In particular, users often select the volume they like each time, and sometimes monitor and confirm the selected volume again, so in the conventional example above, users are always forced to perform several operations and Operations were becoming complicated.

This invention solves the above problem, and when simply monitoring the currently selected volume,
The purpose is to prevent the volume from changing.

In order to achieve the above object, the present invention provides an initial selection disabling circuit that prevents the application of an initial pulse signal based on the initial operation of the volume selection switch to the volume selection signal generation circuit. The feature is that the volume selection signal is prevented from switching.

Embodiments of the present invention will be described below based on the drawings. FIG. 2 is a diagram showing an embodiment of the present invention.

Note that the same parts as shown in FIG. 1 are given the same reference numerals.

In this embodiment, an initial selection invalidation circuit 21 and a volume selection signal generation circuit 22 are provided between a volume selection switch 20 consisting of a monostable switch and a sound generation circuit 19.
and a volume variable circuit 23 are provided, and the volume is changed by a pulse signal output from the volume selection switch 20. The initial selection invalidation circuit 21 is
flip-flops 25, 2 that change the output state in response to a signal F obtained by inverting the operation signal E outputted via the chattering prevention circuit 24 by the inverter 24' in response to the operation of the volume selection switch 20;
6, a NAND gate 28 that combines the output signal H of the ternary counter 27 and the operation signal E and applies it to the volume selection signal generation circuit 22, and a NAND gate 28 that forcibly uses the operation signal E to generate a melody signal. It consists of an OR gate 29 that applies voltage to the circuit 7, and a switch operation clear circuit 30 that counts the operation interval of the volume selection switch 20 and resets the ternary counter 27 when a predetermined time has elapsed.

The switch operation clear circuit 30 includes a flip-flop 31 which sets the output Q to H level in synchronization with the fall of the signal E, which is a pulse signal, and an output signal J of the flip-flop 31 and a clock signal _φ1 from the frequency divider circuit 2. and an AND gate 32 which inputs and synthesizes the signals, and in response to the output signal K of the AND gate 32, counts a predetermined time, for example, about 16 seconds, and outputs the signal to the flip-flops 25, 26,
31, and an OR gate that applies an operation signal E to the reset terminal of the timer 33. Volume selection signal generation circuit 2
2 are flip-flops 35 and 36 that change their output states in response to the signal N from the initial selection invalidation circuit 21;
The AND gate 37 outputs when the output signals O and P of the circuit go to H level, and the output signal Q of the AND gate 37 and the signal from the initial reset circuit 38 that outputs one pulse when the power is turned on are input. It consists of an OR gate 39 for resetting flip-flops 35 and 36. The volume variable circuit 23 includes resistors 40, 41, and 42 connected to the output end of the melody signal generation circuit 7 in parallel to the sound generation circuit 19, and the output signals O and P of the volume selection signal generation circuit 22. an N-channel transistor 43, which inputs the signal to its gate and changes the connection state of the resistors 40, 41, and 42 depending on the state of the signal.
It consists of 44.

Next, the operation in FIG. 2 will be explained based on the time charts shown in FIGS. 3 and 4.

As is clear from the configuration shown in FIG. 2, the volume of the notification sound emitted from the sound generation circuit 19 can be varied by the resistance value in the volume variable circuit 23 depending on the signals O and P output from the volume selection signal generation circuit 22. It has been decided. The flip-flops 35 and 36 which output the signals O and P are initially reset by the initial reset circuit 38, and the signals O and P are at L level as shown in FIG. Therefore, the transistors 43 and 44 are in a non-conductive state, and the three resistors 40, 41 and 42 are connected to the output terminal of the melody signal generation circuit 7, so that the current value of the melody signal R becomes the minimum. Now, when the volume setting switch 20 is operated once, the pulse signal output from the volume setting switch 20 is inverted by the inverter 24' and applied to the flip-flop 25. This flip-flop 25 has a signal F
The output Q of the flip-flop 26 is set to the H level in synchronization with the fall of the flip-flop 26, but the output Q of the flip-flop 26 is kept at the L level. Therefore, the ternary counter 27 advances the count by 1, but its output signal H remains at the L level. Therefore, the initial selection invalidation circuit 21
Volume selection signal generation circuit 2 dependent on signal N from
The states of the output signals O and P of No. 2 also remain unchanged and remain at the L level. On the other hand, the pulse signal from the volume setting switch 20 is also applied to the switch operation clear circuit 30, and this pulse signal causes the timer 33 to start counting, and when it has counted for a certain period of time, it resets the flip-flops 25 and 26 to the initial state. It will return to the state. Therefore, the volume selection switch 2
With one operation of 0, the output state of the volume selection signal generation circuit 22 does not change, and the currently set volume is maintained.

The pulse signal from the volume selection switch 20 is also applied to the melody signal generation circuit 7 via the OR gate 29, so that the melody signal generation circuit 7 outputs a melody signal.

As mentioned above, since the volume is not changed by the first operation of the volume selection switch 20, the melody signal R in this case is the currently set volume,
That is, the signal having the minimum current value is applied to the sound generating circuit 19. Thus, the initial operation of volume selection switch 20 merely acts as a monitor of the currently set volume, and volume selection is blocked by ternary counter 27 and timer 33. Next, as shown in FIG. 4, by operating the volume selection switch 20 three times in succession, the signal E, which is intermittently at the H level, is sent to the initial selection disabling circuit 20.
1, the ternary counter 27 changes the output signal H to H by the second operation of the volume selection switch 20.
level. When the state of the signal H changes in this way, the output signal N of the initial selection invalidation circuit 21 also changes, and as a result, the states of the output signals O and P of the volume selection signal generation circuit 22 also change. When the output signals O and P of the volume selection signal generation circuit 22 are at the L level, the resistors 40, 41, and 42 are connected to the output terminals of the melody signal generation circuit 7. Resistors 40 and 41 are at H level and L level, respectively, and when they are at L level and H level, respectively.
When the signal is at the level, the resistor 40 is connected to the output terminal of the melody signal generating circuit 7. By changing the resistance value in the volume variable circuit 23 in this way, the current value of the melody signal R changes, and the volume can be changed by operating the volume selection switch 20.

Furthermore, since a signal from the volume selection switch 20 is applied to the melody signal generation circuit 7 each time the switch is operated, it is possible to make a selection while monitoring the selected volume.

On the other hand, since a signal is also applied to the reset terminal of the timer 33 every time the volume selection switch 20 is operated, the timer 33 counts the interval between switch operations and resets the flip-flops 25 and 26 when the interval exceeds a certain period of time. This will return it to its initial state.

When the flip-flops 25 and 26 are reset in this manner, the volume selection by the first switch operation is again blocked by the ternary counter 27.

As described in detail above, according to the present invention, an initial selection invalidation circuit is provided, and the initial pulse caused by the initial operation of the volume selection switch is not applied to the volume selection signal generation circuit, so that the volume selection signal is not switched. Therefore, the user can monitor the currently selected volume with just one operation, and if the user wants to change the volume, the user can select the desired volume by simply operating the volume selection switch. Can be done. Therefore, unlike in the past, the user is not forced to perform more operations than necessary, and the complexity of the operations can be eliminated.

As described above, the present invention provides a clock alarm sound volume selection switch circuit which has excellent practical effects.

[Brief explanation of the drawing]

Figure 1 is a diagram showing a conventional clock using a rotary switch or the like as a volume setting switch for the clock alarm sound, Figure 2 is a diagram showing an embodiment of the present invention, and Figures 3 and 4 are Figures 2 and 4. It is a figure which shows the time chart in . 7...Melody signal generation circuit, 19...Sound generation circuit, 20...Volume selection switch, 21...Initial selection invalidation circuit, 22...Volume selection signal generation circuit,
23... Volume variable circuit, 27... Ternary counter,
33...Timer, 40, 41, 42...Resistor, 4
3,44...N channel transistor.

Claims (1)

[Claims for Utility Model Registration] (1) A notification sound signal generation circuit that outputs a notification sound signal, a notification sound generation circuit that receives the notification sound signal and generates the notification sound, and a variable volume of the notification sound. A volume selection switch consisting of a settable monostable switch, a volume selection signal generation circuit that counts pulse signals output from the volume selection switch and outputs a volume selection signal corresponding to the count value, and the notification sound signal. a volume variable circuit that limits the signal level of the signal to a level corresponding to the volume selection signal and supplies it to the notification sound generation circuit; and a volume variable circuit that forcibly supplies the pulse signal to the notification sound signal generation circuit and outputs the notification sound signal. A timepiece having a gate circuit for outputting a signal, the clock having an initial selection disabling circuit that prevents an initial pulse signal outputted from the volume selection switch from being applied to the volume selection signal generation circuit in response to an initial operation of the volume selection switch. A clock alarm sound volume setting switch circuit featuring: (2) The initial selection disabling circuit includes a counter means that prevents the initial pulse signal from being applied to the volume selection signal generation circuit, and resets the counter means when the operation interval of the volume selection switch exceeds a set time. A clock alarm sound volume setting switch circuit according to claim 1, further comprising a timer means.