JPS59226393A - Alarm timepiece - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to an alarm clock using a bell tube. In particular, the volume can be easily adjusted, and the volume of the alarm sound can be increased step by step using the specified circuit for volume adjustment. It is also possible to change the type of sound.

An embodiment of the present invention will be described below based on the drawings. Reference numeral 1 is an oscillator, 2a and 2b are frequency dividers, and 3 is a drive circuit for a motor back.The motor back is used to advance a time display hand (not shown). 5 is a quaternary counter that constitutes the designated circuit;
6 is a selection circuit that selects, for example, 2KHz from frequency divider 2, IK
Hz, 500Hz frequency signals and selects one of these and DC output. 7,8
1 is a gate circuit, 9 is a drive transistor, and 10 is a DC motor, which drives a schmoku (not shown) and hits a phosphor (not shown). 11 is a noise stop switch,
12 is an alarm switch, 13a.

Reference numeral 131 indicates an interlocking switch constituting a switching circuit, 14 a switch constituting a changing device, and 15 a one-way pulse generator.

Next, the operation will be explained. First, we will explain the operation of adjusting the bell sound y (to W, A specific frequency signal or direct current output is specified by the output of , and is selected by selection circuit B and supplied to gate circuit 8.

Then, close the switch 11 to set the alarm, and when the alarm switch 12 closes at the set time, the output selected above is generated from the gate circuit 8, which drives the DC motor 10 and generates a bell sound. . DC upper to 10
depends on the L component of the drive fill, the higher the frequency, the more current L; the rotational force is slightly weakened. Therefore, the volume is the lowest when the frequency signal is 2KHz, and 1K
The volume increases in the order of H2, 500Hz, and w output.

One of these signals is selected by the advance selection circuit B, and a bell sound is generated at a specified volume.

When increasing the volume of the bell sound in stages, the switches 13a and 13b are switched.

As a result, when the alarm switch 12 closes at the set time, one pulse is generated from the one-shot pulse generator 12) and the counter 5 and frequency divider 2b:6; IJ are set. On the other hand, the gate circuit 7 is opened, and the signal from the frequency divider 2b is supplied to the counter 5 after passing through it at a constant period (for example, about several seconds). 2KH every time the content of Karakotsuta 5 is advanced.

, 500Hz, and DC output IEi, and the volume gradually increases.

Note that in the above embodiment, the drive output supplied to the DC motor is varied by varying the frequency of each drive signal, but the present invention is not limited to this, and the frequency of the drive signal may be kept constant. / The volume may be adjusted by changing only the response width, that is, the duty. In this case, operability can be further improved by using a selection circuit that switches the duty of the drive signal based on the output of a counter, and by using an up/down counter as the counter.

In the above embodiment, the case where the alarm sound is generated by a bell has been described, but the alarm sound is generated by a speaker.

It may also be used to generate an electronic alarm sound using a buzzer or the like. In this case, you can change the volume by selecting the drive signal, or change the sound generation interval, height, ringing pattern, etc.
The sound quality etc. may be changed. Alternatively, a plurality of melodies may be prepared and one of these melodies may be selected and generated.

As described above, according to the present invention, by changing the contents of the specified circuit, the drive signal of the sound generating device can be switched, and the volume can be easily adjusted.Also, by sequentially switching the drive signal using the specified circuit, an alarm can be generated. You can gradually increase the volume of the sound and change the type of sound, allowing you to wake up comfortably.

[Brief explanation of drawings]

The drawing is an electrical circuit diagram showing an embodiment of the present invention. 2α, 2b... Frequency division k 5... Designated circuit 6
... Selection circuit 7, 8 ... - Gate circuit 9 ... Drive transistor 10 ... DC motor 13α, 13b ... Switching circuit 14 ... Changing device Applicant Seikosha Co., Ltd. Agent Patent Attorney Mogami

Claims (1)

[Claims] A sounding device, a selection circuit that selects one of a plurality of drive signals for driving the sounding device, a designation circuit that designates a drive signal to be selected by the selection circuit, and a drive signal selected by the selection circuit. a driving circuit that drives the sounding device at a set time using a change device that manually changes the specified contents of the designated circuit; a pulse generating circuit that generates a pulse of a constant period at the set time; and this pulse generating circuit. an alarm clock comprising a switching circuit that selects either the pulse from the output from the changing device or the output from the changing device and supplies the selected circuit to the designated circuit.