JPS5824231Y2 - Clock notification circuit - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a notification circuit for a watch that uses a common notification device to notify time and alarm.

Generally, a clock has the function of not only reporting time on the hour but also providing an alarm notification at a set time.

However, in the past, a dedicated device was used for alarm notification in a watch, which had the drawback of being complicated and costly.

In view of these points, the present invention attempts to provide a notification circuit for a timepiece that can simplify the timepiece and reduce its cost by using the notification device for both time notification and alarm notification.

An embodiment of the present invention will be described below with reference to the drawings.

As shown in Figure 1, the hour drum 11 and the 10 minute drum 1
2 and the minute drum 13 are pivotally supported on a support frame 14, 15 to constitute a clock mechanism, and numbers are attached to the surface and these numbers are sequentially displayed externally from a display window on the front panel (not shown). The time will be displayed.

The minute drum 13 is driven by an AC motor for driving the clock mechanism.
The minute drum 12 is driven intermittently by 1/10 rotation every minute, the minute drum 12 is driven by a mechanism (not shown) by 1/6 rotation for each revolution by the minute drum 13, and the hour drum 11 is driven by a mechanism not shown in the figures. Each rotation of the drum 12 is driven by a mechanism (not shown) by 1/12 rotation.

A cam 16 is integrally attached to the timing drum 11, and a base end of an operating lever 17 is pivotally supported on a support frame 14.

This actuating lever 17 is given the habit of having its free end pressed against the cam 1d by a spring 18, and as shown in FIG. is driven by the drive unit 20.

Also, the reference drum 21 and the time cam 22 are attached to the support frame 14.
．． 23, the timer cam 22 is provided with a protrusion 24, and the reference drum 21 is provided with four parts corresponding thereto.

The timer cam 22 rotates integrally with the drum 12 for about 10 minutes, and the operating frame 25 has its base end swingably supported by the casing 26 and between the free end and the support frame 23. A tension spring 27 is attached to the reference drum 21.
It is provided with the habit of being pulled through a timed cam 23 on top.

The reference drum 21 has numbers attached to its surface and is displayed externally through a display window on the front panel to display the alarm notification time.

This guide drum 21 is connected to an external guide heir, and is rotated by a rotation operation of the guide heir to set an alarm notification time.

Normally, the protrusion 24 of the timer cam 22 is offset from the recess of the indicator drum 21, and the free end of the operating frame 25 is separated from the indicator switch 28.

When the clock mechanism reaches the alarm time, the projection 24 of the time cam 22 falls into the recess of the reference drum 21 and moves toward the reference drum 21 side.

Therefore, the operating frame 25 swings toward the reference switch 28, and the reference switch 28 is driven.

Also, a music box 29 is used as a notification device, and this music box 29 is driven by a DC motor 30 to produce a sound.

A cam 31 is integrally attached to the music box 29, and a third
As shown in the figure, this cam 31 allows the self-holding switch 3 to
2 is driven.

This switch 32 is turned off at its home position every time the music box 29 rotates once.

As shown in FIG. 4, the AC motor 3 for driving the clock mechanism
3 and the primary side of a transformer 34 are connected in parallel to an AC power supply, and one end of the secondary winding of the transformer 34 is connected to a positive terminal 36 via a diode 35, and the other end is connected to a negative terminal 37.
connected to.

A capacitor 38 is connected between the positive terminal 36 and the negative terminal 37, and the positive terminal 36 is connected to the movable contact piece of the time signal switch 19 and the normally closed side fixed terminal of the indicator switch 28.

The normally open fixed terminal of the time signal switch 19 is connected to the capacitor 3.
It is connected to the negative terminal 37 via a resistor 9, to the base of a driving NPN transistor 41 via a resistor 40, and to the normally open fixed terminal of the reference switch 28.

A capacitor 42 is connected between the movable contact piece of the reference switch 28 and the negative terminal, and the emitter of the transistor 41 is connected to the negative terminal 37.

The DC motor 30 is connected between the collector of the transistor 41 and the positive terminal 36, and the self-holding switch 32 is connected in parallel with the transistor 41.

Such a circuit performs a time reporting operation at the timing shown in FIG.

That is, when the clock mechanism reaches the hour, the time signal switch 1
9 is turned on instantaneously (about 0.5 to 1 second), and the capacitor 39 is charged by the DC voltage (hereinafter referred to as power supply voltage) between the positive terminal 36 and the negative terminal 37.

This power supply voltage is obtained by lowering the voltage of the output of the AC power supply by a transformer 34, rectifying it by a diode 35, and smoothing it by a capacitor 38.

The charging voltage of the capacitor 39 is applied to the base of the transistor 41 via the resistor 40, and the transistor 41 is turned on.

For this reason, the DC motor 30 has a power supply voltage of the transistor 4.
1 and causes the music box 29 to play.

The self-holding switch 32 is turned on when the music box 29 is started, and the DC motor 30 is turned on until the self-holding switch 32 is turned off again even if the transistor 41 is turned off, that is, until the music box 29 rotates once.
9 to signal the time.

In this case, the time constants of the capacitor 39 and the resistor 400 may be set by starting the DC motor 30 and turning on the self-holding switch 32.

Further, the alarm notification operation is performed at the timing shown in FIG.

That is, the capacitor 42 is normally in a state where it is charged by the power supply voltage.

Then, at the set alarm notification time, the standard switch 28 is turned on, the charging voltage of the capacitor 42 is applied to the base of the transistor 41 via the resistor 40, the transistor 41 is turned on, and the music box 29 is turned on as described above.
is driven by the DC motor 30 and produces a sound.

Due to the time constants of the capacitor 42 and the resistor 40, the transistor 41 operates as shown in FIG. 6, and its collector current attenuates over time.
2 is on, the rotation of the DC motor 30 is constant.

When the collector current of the transistor 41 becomes less than the motor drive limit, the DC motor 30 stops and the music box 29 stops when the self-holding switch 32 is turned off.

In this case, the time constants of the capacitor 42 and the resistor 40 are set so that the music box 29 rotates 3 to 5 times, and the alarm is notified by the long sound of the music box 29.

In another embodiment of the present invention, as shown in FIG. 7, the notification operation and the alarm notification operation can be selected and performed using selection switches 43 to 45.

The selection switches 43 and 44 are switches that operate in conjunction with each other, and the second fixed terminal is an empty terminal.

The first and third fixed terminals of the selection switch 43 are connected to the motor 30.
The - end is connected to the movable contact piece of the time signal switch 19 and the normally closed side fixed terminal of the reference switch 28.

The selection switch 44 has a movable contact connected to the connection point of the capacitor 39 and the resistor 40, a first fixed terminal connected to the normally open side fixed terminal of the reference switch 28 and one end of the selection switch 45, and a third fixed terminal connected to the selection switch 45. It is connected to the other end of the switch 45 and the normally open fixed terminal of the time signal switch 19.

If the selection switch 45 is opened and the movable contacts of the selection switches 43 and 44 are connected to the first fixed terminal, the time reporting switch 19 will be disabled and only the alarm notification operation will be performed.

If the movable contacts of the selection switches 43 and 44 are switched to the second fixed terminals, the effect of the time signal switch 19 and the guide switch 28 is lost, and neither the time signal operation nor the alarm notification operation is performed.

When the movable contacts of the selection switches 43 and 44 are switched to the third fixed terminal, the effect of the indicator switch 28 is lost and only the time signal operation is performed.

Further, when the selection switch 45 is closed, the time reporting operation and the alarm reporting operation are performed in the same manner as in the previous embodiment.

As described above, according to the clock alarm circuit according to the present invention, since the alarm device is shared for time reporting and alarm reporting, the construction of the clock can be simplified and costs can be reduced.

[Brief explanation of drawings]

Figure 1 is a schematic front view showing an example of a watch to which the present invention is applied;
2 and 3 are side views showing a part of the same timepiece, FIG. 4 is a circuit diagram showing an embodiment of the present invention, and FIGS. 5 and 6 are a time chart of the same embodiment, and FIG. FIG. 7 is a circuit diagram showing another embodiment of the present invention. 19... Time signal switch, 28... Reference switch, 30... DC motor for driving music box, 32... Self-holding switch, 39...
... Capacitor, 40 ... Resistor, 41 ...
...Drive transistor, 42...Conductor.

Claims (1)

[Scope of utility model registration request] 1. A timepiece in which an alarm device is driven by a DC motor, a driving transistor interposed between the DC motor and a power source, a time alarm switch that is turned on when alarming the time;
A time constant circuit that turns on the drive transistor for a predetermined time when the time signal switch is turned on; a reference switch that turns on when a set alarm is notified; and a time constant circuit that turns on the drive transistor for a predetermined time when the time signal switch is turned on; An alarm circuit for a clock, comprising a circuit that turns on only a predetermined time different from the time of the clock. 2. The alarm circuit for a timepiece according to claim 1, which is a utility model, and includes a self-holding switch controlled on and off by the DC motor and connected in parallel with the driving transistor. 3. The alarm circuit for a watch according to claim 1, which uses a music box as the alarm device. 4. The alarm circuit for a watch as set forth in claim 1 of the utility model registration claim, in which the alarm reporting time is set longer than the time reporting time. 5. Scope of Utility Model Registration Claim 1, comprising a selection switch that selectively performs time reporting and alarm reporting operations by controlling the same magazine that operates a driving transistor in accordance with the time reporting switch and reference switch. The clock alarm circuit described in .