JPS6210706Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a notification sound generation mechanism for a watch that can switch between multiple notification sounds, such as an electronic sound and a striking bell, and in particular simplifies the notification sound switching selection mechanism. It is something that

Traditionally, watches have been configured to generate a wide variety of notification sounds, such as electronic sounds and striking bells, and the user can select one type of notification sound according to their preference. A method has been proposed.

FIG. 1 is a circuit diagram showing an example of the conventional notification sound generating circuit.

In the figure, a guide circuit 2 that outputs a signal at a preset time is connected to a guide switch 4 that is built into a clock train (not shown) and closes at a preset time, and a guide switch 4 that outputs a signal at a preset time. a ring stop switch 6 used by the user to stop the notification sound;
Consists of. The output from the reference circuit 2 is connected to interlocking contacts 8a and 8b of the selection switch circuit 8. This selection switch circuit 8 includes 8c, 8d, 8e, 8
There are contacts f, 8g, and 8h. The contact point 8c is connected to one end of a bell-striking motor 10, and the other end of the motor 10 is connected to a power source. The bell striking unit 12 is a mechanism that strikes a bell, ring, etc. to generate a striking sound by driving the bell striking motor 10. A bell-striking mechanism 14 is formed by the bell-striking motor 10 and the bell-striking section 12.
It consists of

On the other hand, terminals 8d and 8e of the selection switch circuit 8 are connected to input terminals 16a and 16b of the electronic sound generation integrated circuit 16, respectively. The electronic sound integrated circuit 16 is a circuit that generates multiple types of electronic sound signals as notification sounds, and has terminals 16a and 16b.
One of the electronic sounds is selected depending on the signal input to the electronic sound. Further, contacts 8g and 8h of the selection switch circuit 8 are both connected to an input terminal 16c of the electronic sound generation integrated circuit 16.
This input terminal 16c is configured so that a high potential (hereinafter referred to as H) is input when nothing is connected to it, and when a low potential (hereinafter referred to as L) signal is input, the electronic sound generation integrated circuit 16c output terminal 16d of
The electronic sound generation signal selected by the signals input to the input terminals 16a and 16b is output from the input terminals 16a and 16b. And this output terminal 16d
is connected to an electronic sound generator 18 that generates an electronic sound.

The electronic sound generation integrated circuit 16 and the electronic sound generation section 18 constitute an electronic sound generation circuit 20.

Therefore, the user connects the interlocking contacts 8a and 8b of the selection switch circuit 8 to the contacts 8e and 8h, respectively.
With the ring stop switch 6 closed, when the preset time arrives and the reference switch 4 is closed, the input terminal 16c of the electronic sound generation integrated circuit 16
An L signal is input to. Therefore, output terminal 16
An electronic sound generation signal is output from d, and the electronic sound generation section 12 generates an electronic sound. If the user connects the interlocking contacts 8a and 8b of the selection switch circuit 8 to the contacts 8d and 8g, respectively,
As before, the output terminal 16d of the electronic sound generation circuit 16
Although an electronic sound generation signal is output from the input terminals 16a and 16b, the signals input to the input terminals 16a and 16b are different from the previous ones, so that a different electronic sound is generated.

In addition, the user selects the interlocking contact piece 8 of the selection switch circuit 8.
If a and 8b were connected to the contacts 8c and 8f, respectively, an H signal would be input to the input terminal 16c of the electronic sound generation integrated circuit 16, so the electronic sound generation integrated circuit 16 would not generate an electronic sound. signal is not output. Instead, current flows from the power supply to the bell-striking motor 10, so the bell-striking motor 10 is driven and the bell-striking section 12 generates a bell-striking sound.

In this way, the user can switch between the ringing sound and the electronic sound as the notification sound by simply switching the selection switch circuit 8. However, as shown in Fig. 1, the number of terminals of the selection switch circuit 8 is required to be eight just to enable the selection of the ringing sound and two types of electronic sounds as the notification sound. If you try to increase the number of notification sounds, the number of terminals will definitely increase by two for each type. As a result, the selection switch circuit 8 has become larger and more complex, leading to an increase in cost and manufacturing process.

The present invention eliminates the above-mentioned conventional drawbacks, and its purpose is to simplify the notification sound switching selection mechanism in a watch notification sound generating device that allows switching between a striking bell sound and an electronic sound as the notification sound; cost reduction,
The aim is to make it smaller.

In order to achieve the above-mentioned purpose, the present invention is based on the fact that the DC resistance of the coil of the bell-striking motor is relatively small, usually 10 to 15Ω, and that the operating current of the electronic sound generation integrated circuit is the same as the driving current of the bell-striking motor. By focusing on the fact that it is extremely small (usually around 1/1000) and connecting the coil of the bell-striking motor between the reference circuit and the selection switch circuit, the bell-striking motor can be used to generate an electronic sound. The coil is used simply as a conductive path, and when the sound is switched, a large current is applied to the bell-striking motor to drive the motor, and the DC resistance of the coil of the bell-striking motor is used as a pull-down resistor. do.

Embodiments of the present invention will be described below based on the drawings.
FIG. 2 is a circuit diagram showing an embodiment of the present invention.
In the figure, the reference circuit 6, the bell striking mechanism 14, and the electronic sound generating circuit 20 have the same configuration as in FIG. 1, so their explanation will be omitted. In FIG. 2, the selection switch circuit 30 includes one contact piece 30a and three contacts 30a.
It has b, 30c, and 30d. Of these, 30 contact pieces
a is connected to one end of a motor 10 for striking a bell, and the other end of the motor 10 is connected to a reference circuit 2. Further, the contact piece 30a is connected to an input terminal 16c of the electronic sound generation integrated circuit 16. A contact 30b of the selection switch circuit 30 is connected to a power source, and contacts 30c and 30d are connected to input terminals 16a and 16b of the electronic sound generation integrated circuit 16, respectively.

The operation of this circuit will be explained below.

The user closes the noise stop switch 6, and the contact piece 30a
When the reference switch 4 is closed at the set time after connecting to the contact 30b, current flows from the power supply to the bell-striking motor 10 via the selection switch 30. As a result, the bell-striking motor 10 is driven, and a bell-striking sound is generated as a notification sound. At this time, the current value flowing through the bell-striking motor 10 is approximately 100 mA when the power supply voltage is 1.5V. Further, at this time, the voltage drop value due to the DC resistance of the coil of the bell striking motor 10 is equal to the power supply voltage value. The DC resistance of this bell striking motor 10 is the electronic sound generation integrated circuit 1.
Since the input terminal 16c acts as a pull-down resistor for the input terminal 16c of the electronic sound generation integrated circuit 1, the power supply voltage value, that is, the H signal is applied to the input terminal 16c.
No electronic sound is generated from 6 onwards.

In addition, when the contact piece 30a is connected to the contact point 30c or 30d, the reference switch 4 is activated when the set time arrives.
When closed, current flows from the input terminal 16c of the electronic sound generating integrated circuit 16 to the bell-striking motor 10 via the contact piece 30a of the selection switch circuit 30. Since the current value at this time is about 100 μA, which is the operating current value of the electronic sound generation integrated circuit 16, the bell-striking motor 10 is not driven. Moreover, the voltage drop due to the DC resistance of the coil of the bell striking motor 10 is also 0.001 ~
Since the voltage is about 0.0015V, an L signal is applied to the input terminal 16c of the electronic sound generation integrated circuit 16, and the electronic sound generation signal is output from the output terminal 16d of the circuit 16, and the electronic sound is emitted. Output.

In this way, according to this embodiment, the selection switch circuit is configured to select between the striking sound and two types of electronic sounds, and the selection switch circuit has four terminals, as opposed to the conventional eight terminals. A device with terminals will suffice. Therefore, the selection switch circuit itself can be reduced in cost and size, and the number of installation steps for the selection switch circuit can be reduced.

In this embodiment, a clock alarm sound generating device that can switch and select two types of electronic sounds in addition to the striking sound has been described, but of course it is also possible to increase the types of electronic sounds that can be selected. Compared to conventional methods, the selection switch mechanism is lower in cost, smaller in size,
The number of installation steps can be reduced.

As described above, according to the present invention, in the alarm sound generation device for a watch in which a selection switch circuit can switch and select between a striking bell sound and an electronic sound as an alarm sound, a striking sound is provided between a reference circuit and a selection switch circuit. By connecting the motor coil, the selection switch circuit can be made lower in cost and smaller in size, and the number of installation steps can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing a conventional notification sound generation circuit, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. 2... Reference circuit, 8, 30... Selection switch circuit, 10... Bell striking motor, 14... Bell striking mechanism,
16... Integrated circuit for electronic sound generation, 18... Electronic sound generation section.

Claims (1)

[Claims for Utility Model Registration] A reference circuit that is connected to one terminal of a power source and generates an output signal to an output terminal at a preset time, at least two switching input terminals, and an operation signal input terminal. When the output signal from the reference circuit is supplied to the operation input terminal and any one of the switching input terminals, an electronic sound generation signal is generated from the output terminal and one of the at least two switching input terminals is supplied. an electronic sound generation integrated circuit that varies an electronic sound generation signal generated from the output terminal depending on whether an output signal from the reference circuit is input to a terminal; and electronic sound generation from the electronic sound generation integrated circuit. an electronic sound generating section that receives the signal and generates an electronic sound as a notification sound; and a bell-striking motor that is driven by supplying current from the power supply circuit in response to the output signal from the reference circuit to provide notification. a bell-striking mechanism that generates a bell-sounding sound; a selection switch that switches and supplies an output signal from the reference circuit to either the bell-striking mechanism or the switching input terminal of the electronic sound generation integrated circuit; In the alarm sound generating device for a watch, the selection switch has one contact piece and at least three
one contact is directly connected to the other terminal of the power source, and at least two other contacts are connected to each switch of at least two of the electronic sound generating integrated circuit. The input terminals were connected to each other, and the operating signal input terminal of the electronic sound generation integrated circuit was connected to the contact piece, and the bell striking motor was connected between the contact piece and the output terminal of the indicator switch. A clock alarm sound generation circuit characterized by: