JPS61164183A - Electronic metronome - Google Patents

Abstract

PURPOSE:To realize long period operation by providing a step motor part connected to stepping motor drive generating part and an accelerating part which has tact bar which is moved reciprocatingly by the step motor. CONSTITUTION:A box type accelerator 2 is placed at the lower part of frame body 1, and outside of the accelerator 2 is provided with step motor 4, and in front of the step motor 4 is provided with loud speaker 5, and at the bottom of frame body 1 is provided with power source 6 which is consisted of batteries. Then slide a button 10 of slide control body 7 to the optional scale of tempo and rhythm, and turn on the power source 6. Then the step motor 4 is driven by comb shaped signal controlled by pulse generation circuit of power control part, and the step motor 4 continuously moves the tact bar 15 reciprocally in the range of 72 deg. at every 4 pulses, and a sound is issued at the reverse action of the tact bar.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an electronic metronome.

[Summary of the invention]

The present invention relates to a new improvement for obtaining an electronic metronome driven by a step motor and for obtaining an energy-saving electronic metronome by keeping the torque-frequency characteristics of the step motor constant.

[Conventional technology]

There are various types of metronome that have been used in the past, but the most typical configuration is a mechanical metronome. However, since mechanical metronomes used a spring as their driving force, they had to be wound frequently, which was inconvenient.

Furthermore, the electronic metronome that has been used recently displays tempo, time signature, etc. with sound and light, and it has been impossible to surpass the display effect of the conventional tact stick.

Subsequently, in order to achieve this tact effect, an electric meter was developed to produce a tact bar effect using sound, light, and a meter.

[Problem that the invention seeks to solve]

An electronic metronome, which is intended to have the effect of an electric meter's tact bar, has poor followability with the electric meter, and when the tempo or beat becomes fast, the poor followability becomes apparent, and it has not been possible to obtain satisfactory characteristics. Furthermore, in electric meters, it is difficult to use a large meter needle due to the driving force, and only a small meter needle can be used, and it is impossible to outperform the effect of a conventional tact rod. It was possible.

Furthermore, as shown in Figure 3, the step motor's driving force characteristics vary greatly depending on the voltage parameter, so the battery life will be shortened if the step motor is always driven with the same pulse width. The additional load placed on the tact rod increased noise, and also shortened the life of the motor. In addition, providing a step motor with a speed reduction mechanism such as a gear to drive the tact rod requires the step motor to rotate at high speed and multiple times, resulting in noise due to high speed rotation, energy loss due to multiple rotations, and a reduction in battery life. This was a factor.

[Means for solving problems]

It is an object of the present invention to provide an extremely effective means for quickly eliminating the above-mentioned drawbacks, and in particular, it is an object of the present invention to provide an extremely effective means for quickly eliminating the above-mentioned drawbacks. A strong and powerful step motor with a built-in speed increasing mechanism drives the reciprocating drive, and pulse signals from the Nutep motor drive signal generator and pulse generator circuit are input to the power controller to control the drive signal applied to the step motor. This is a configuration in which the drive torque is made almost uniform as a comb-shaped pulse.

[Effect]

When the electronic metronome configured as described above is activated, the tact bar is reciprocated by the step motor, and the tact bar can be efficiently oscillated by the speed increasing mechanism. Furthermore, since the structure is such that the driving torque is almost uniform, the battery life can be extended.

〔Example〕

Hereinafter, preferred embodiments of the electronic metronome according to the present invention will be described in detail with reference to the drawings.

In the drawings, the frame body designated by reference numeral 1 has a generally trapezoidal shape, and a speed increasing mechanism 2 having a box-like shape as a whole is fixed to the lower part of the frame body 1 by bolts 3. A step motor 4 is mounted on the outer side of the speed increasing mechanism section 2. A speaker force 5 is provided at the front of the step motor 4, and a power source 6 drawn from a battery is provided at the bottom of the frame 1. A slide type control body 7 is attached to 1α, and an operator 8 of this slide type control body 7 protrudes through a guide hole 9 of the front plate 1α, and a button 10 is fitted into this operator 8. has been done.

As shown in FIGS. 4 and 5, the speed increasing mechanism section 2 includes:
A small gear 1 on the driven side is located above the step motor rotating shaft 12 of the step motor 4 mounted on the casing body 11.
4 is integrally attached to the tactile rod shaft 16, and the tactile rod 16 is rotatably supported by the casing body 11.

One end 16a of the tact rod shaft 16 is connected to the casing body 1.
A tough rod 15 is integrally fixed to one end 16a of the rod 1 and is integrally attached thereto.

Here, the reciprocating rotation angle of the tact rod 15 is set to 72 degrees. In addition, the speed increasing ratio of the gear is 1:2 and -6, so the step motor 4 is configured to rotate 9 degrees with one pulse, so 4 pulses are required to make one swing of the tact rod 15. . If the tact rod 15 is designed to be reversed when 4 pulses are input, the tact rod 15 will swing back and forth.

Further, in the electrical circuit configuration constituting the electronic metronome of the present invention, as shown in FIG.
, a strong beat, a weak beat, and a consonant synthesizer 43 are connected to the speaker section 5, a tempo setting section 45 is connected to the tempo synthesizing section 41, and a beat setting section 46 is connected to the beat signal generating section 42.

The signal from the tempo synthesis section 41 is applied to the stepping motor drive signal generation section 47 and the power control section 48, and is also applied to the stepping motor drive signal generation section 47.
The output signal of is applied to the power control section 48. A detection signal from a power supply voltage detection circuit section 49 is applied to the power control section 48, and an output signal from the power control section 48 is supplied to the stepping motor section 4.

Specifically, the power control section 48 and the stepping motor drive signal generation section 47 are configured as shown in FIG. The signal is configured to enter the pulse generation circuit 52 via the arithmetic circuit 51, and based on the data calculated by the arithmetic circuit 51 using the input tempo signal and voltage signal, any set data can be generated. One comb-shaped pulse having a -T ratio is output from the pulse generating circuit 52.

The output from this pulse generation circuit 52 is an AND circuit group 53 connected to the stepping motor drive signal generation circuit 47.
When a four-phase signal from the stepping motor drive signal generation circuit 47 (shown in FIG. 8) is inputted to Four-phase drive pulses (shown in FIG. 8) are applied to the step motor section 4 through the forward/reverse control circuit 54, and the step motor section 4 is rotated in forward and reverse directions.

In the above configuration, when operating the electronic metronome according to the present invention, first slide the button 10 of the sliding control body 7 to set the scale to a desired tempo and time signature, and then turn on the power. Then, the step motor section 4 is driven by the comb-shaped signal controlled by the pulse generation circuit 52 of the power control section 48,
The step motor section 4 moves the tact rod 15 7 times every 4 pulses.
A continuous reciprocating motion is performed within a range of 2 degrees, and when the tact rod 15 is reversed, sound is produced from the speaker section 5.

〔Effect of the invention〕

Since the electronic metronome according to the present invention has the above-described configuration and function, it can electrically operate the tact bar for long periods of time in exactly the same way as conventional mechanical metronomes, and furthermore, it Since a comb-shaped pulse is supplied (14 passes in this example) and reversed every 4 passes, the battery life is long and there is no extra rotation, so there is less noise. Moreover, it has excellent effects such as being able to extend the life of the motor.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing an electronic metronome according to the present invention, FIG. 2 is a front view of FIG. Figure 5 is a front configuration diagram of Figure 4, Figure 6 is a block diagram showing the overall configuration, Figure 7 is a circuit diagram showing the configuration for power control of the main part of the invention, and Figure 8 is a block diagram showing the overall configuration. FIG. 3 is a waveform diagram showing step motor drive waveforms. 1... Frame 2... Speed increasing mechanism 3... Port 4... Step motor 5... Speaker 6... ...Power source 7...Sliding control body 9...Guide hole 10...Button 11...Casing body 12...Step motor rotation Axis 13...
- Drive side large gear 14... Driven side small gear 15... Tact rod 16... Tact rod shaft 40... Reference oscillator -41... ... Tempo synthesis section 42 ... Time signature generation section 43 ... Strong time signature Weak time consonant synthesis section 45 ...
- Tempo setting section 46... Beat setting section 47... Stepping motor drive signal generation section 48... Power control section 49... Power supply voltage detection circuit 51 ... Arithmetic circuit 52 ... Pulse generation circuit 56 ... AND circuit -11-' 54 ... Forward/reverse control circuit Applicant: Seiko Electronics Co., Ltd. Figure 1 Front view of Figure 1 Figure 2

Claims (2)

[Claims] (1) A tempo synthesis section for inputting the output signal from the reference oscillator, a beat signal generation section for inputting the output signal from the tempo synthesis section, and a strong beat signal for the output from the beat signal generation section. a speaker section for generating sound through the weak beat consonant synthesis section; a stepping motor drive signal generation section for inputting the output from the tempo synthesis section; and a step motor section connected to the stepping motor drive signal generation section. An electronic metronome comprising a speed increasing mechanism section having a tact rod reciprocally driven by the step motor section, and configured so that the tact rod can be electrically reciprocated by the step motor section. (2) A power control section provided between the stepping motor drive signal generation section and the step motor, and a pulse generation circuit for changing the signal duty ratio from the tempo synthesis section provided in the power control section. and inputting the pulse signals from the step motor drive signal generation section and the pulse generation circuit to the power control section so that the drive signal applied to the step motor is made into a comb-like pulse to substantially equalize the drive torque. An electronic metronome according to claim 1, characterized in that the electronic metronome is configured as follows.