CN2031960U

CN2031960U - Dynamics keyboard

Info

Publication number: CN2031960U
Application number: CN 88201696
Authority: CN
Inventors: 潘国华
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-03-09
Filing date: 1988-03-09
Publication date: 1989-02-01

Abstract

The utility model discloses a strength keyboard, comprising keys, magnetic blocks, a frame and an induction printed board. The pressing key actions make the magnetic blocks move and generate strength signals in an inductor coil; the strength signal strength corresponds to the pressing key strength, which makes the common electronic musical instrument possible to realize keyboard strength. The utility model has the advantages of low cost, simple structure and the same effect as a piano. A tone making woollen circuit is adopted, so the property is more like the piano.

Description

Dynamics keyboard

A kind of Dynamics keyboard that is used for electronic musical instrument.

Dynamics keyboard also is dynamic keyboard.It is the indispensable ingredient of modern high gear keyboard electronic musical instrument.Adopt the electronic musical instrument more artistic degree of depth and the emotion of reproducing music works that Dynamics keyboard is arranged during performance.

General electronic musical instrument uses non-Dynamics keyboard.By button the contact switch of the sounding circuit of each key correspondence is carried out break-make control.This mode can only be controlled having or not of output, can not embody the corresponding relation of output volume and keystroke dynamics, thereby can not express the emotion of musical works.Piano then drives hand hammer by the hammered string instrument structure of keyboard by complexity and knocks steel wire and send musical sound and embody feel dynamics characteristic.But complex structure, cost are very high.

In recent years, external high-grade specialty realizes the keyboard dynamics with qin with multiconductor and computer technology.Clavinova CLP-50 pianotron as Japanese Yamaha (YAMAHA) adopts A.WM ^TMTechnology (Advanced Wave Memory, senior sound wave Storage Techniques), the feel dynamics that makes keyboard with digital form is similar to corresponding with the ladder of 8～16 different loudness.But adopt extraordinary device, cost high (surpassing piano), complex structure, adjustment inconvenience, reliability and life-span all have much room for improvement, and can't be used for the ordinary electronic musical instrument.The development of domestic electronic musical instrument is started late, and device, material, technology all can not guarantee the low price exploitation of high-performance qin.Therefore, generally believe that general electronic musical instrument will realize that the keyboard dynamics is impossible.

The purpose of this utility model is to adopt the ordinary electronic device, develops a kind of simple in structurely, with low cost, can be used for the suitable Dynamics keyboard of ordinary electronic musical instrument, effect and piano.

The use of Dynamics keyboard described in the utility model has the dynamics effect suitable with piano when general electronic musical instrument is played, and simple in structure, easy to manufacture, with low cost.It has broken away from the notion of general electronic music instrument keyboard with the simple make-and-break signal of switch contact transmission, realizes the dynamics effect of keyboard with way of electromagnetic induction.This Dynamics keyboard is made of the key of band magnetic patch and the induction printed board of band inductive coil and element circuit.Actuation of keys makes the magnetic patch motion that is fixed on the key, produces induction dynamics signal in corresponding inductive coil.This signal amplifies the input sounding circuit through element circuit.The movement velocity of its signal intensity and magnetic patch, i.e. key dynamics correspondence during button, thus produce the note signal of corresponding loudness, realize the dynamics effect of keyboard.It than alternate manner more near the dynamics characteristic of piano.Attached sound-adding circuit can realize further that the singly-bound of lingering sound independently controls, and makes the pronunciation continuation also suitable with piano.

Dynamics keyboard described in the utility model has following characteristics:

Intensity of phonation when 1, key is played is corresponding fully with keystroke dynamics, has dynamic range and the sensory features suitable with piano; 2, Du Te induction structure makes each adjacent inductive coil have an amount of normal distribution mutual inductance mutually number, the musical sound frequency spectrum is constituted contain abundant harmonic wave, and eliminated the universal keyboard contact and easily gone out overtone and the dim shortcoming of treble tone color, improved the degree of purity of each range of sound musical sound at bass area; 3, simple in structure, easy realization, easy to adjust.Dynamics keyboard is just fixed a magnetic patch on each key of normal standard keyboard, and increases the induction printed board of a band inductive coil.Its profile, size, structure and circuit interface all with the QWERTY keyboard compatibility.Each key of Dynamics keyboard all has a semifixed resistor R ₃Adjust the dynamic range and the keystroke sensitivity of key; 4, contactless control has improved the reliability and the serviceable life of keyboard, and the multiple high frequency radiation of effectively having eliminated due to the contact is controlled is disturbed; 5, cost is low.Owing to use general-purpose device, the Dynamics keyboard cost is only high by about 50% than QWERTY keyboard.Adopt the pianotron production cost of Dynamics keyboard to be lower than 600 yuan/frame, the ordinary electronic piano that does not have the dynamics keyboard in the market is 1200 a yuan/frame, and piano is 4000～6000 a yuan/frame.Use AWM ^TMThe domestic price of Yamaha CLP-50 pianotron of technology is 6000-8000 unit/frame.

Below in conjunction with description of drawings embodiment of the present utility model.

Fig. 1 is the Dynamics keyboard side view;

Fig. 2 is an induction printed board structural drawing;

Fig. 3 is element circuit figure;

Fig. 4 is a system sound circuit diagram.

As figure, the said Dynamics keyboard of the utility model is made of key 1, magnetic patch 2, qin frame 3 and induction printed board 4.Magnetic patch 2 is fixed on below the key 1, and induction printed board 4 is contained on the qin frame 3.Four high guaily unit 5, palisade induction bar 6, output interface 7 and resistance R are arranged in the induction printed board 4 ₁, R ₂With semifixed resistor R ₃, be wound with inductive coil L on the induction bar 6.A four high guaily unit 5 is made of 4 element circuits 8.Figure 2 shows that 12 key boards, the quantity of element circuit 8 must equal the bond number of keyboard.So 12 inductive coil L, resistance R are arranged among the figure ₁, R ₂, R ₃With 3 four high guaily units 5.The dynamics signal gating that produces among 8 couples of inductive coil L of element circuit amplifies, and is added to the input end of the transistor BG of sounding circuit 9, adjusts semifixed resistor R ₃Can obtain satisfied dynamics effect.R ₃Standard resistance range be 100-1K Ω.The output interface 7 of induction printed board 4 is compatible fully with the QWERTY keyboard of ordinary electronic musical instrument.

During performance, press or decontrol key 1, driving magnetic patch 2 moves up and down, in corresponding inductive coil L, produce strong and weak corresponding dynamics signal with magnetic patch 2 movement velocitys, gating through element circuit 8 amplifies, is added to the transistor BG input end of sounding circuit 9 as key pulse, thereby produces the note signal that volume is proportional to key 1 keystroke dynamics.

Embodiment 2: 9 of element circuit 8 of this Dynamics keyboard and sounding circuits also can add a system sound circuit 10, use the electronic musical instrument of this Dynamics keyboard to have more characteristic near piano.System sound circuit 10 is by diode D ₁, D ₂, resistance R ₄Constitute with contact K.D ₁Except that element as system sound circuit 10, replace the effect of transistor BG in the sounding circuit 9 in addition, therefore, behind the employing system sound circuit 10, no longer need transistor BG in the sounding circuit 9.When key 1 was pressed to the 1/2 full degree of depth, contact K connected, D ₂Oppositely end, do not constitute additional discharge loop, the voltage of capacitor C discharges slowly in the sounding circuit 9, and lingering sound is long; When button to 1/2 degree of depth was decontroled immediately, contact K disconnected, diode D ₁, D ₂With resistance R ₄Form additional discharge loop, capacitor C upward voltage release is just fast, and lingering sound is short.Make the musical sound lingering sound length of sounding circuit 9 generations and the state of key 1 be corresponding relation fully.

Claims

1, a kind of electronic musical instrument keyboard, particularly Dynamics keyboard are made of key 1 and qin frame 3.It is characterized in that comprising and be fixed on the magnetic patch 2 below the key 1 and be installed in induction printed board 4 on the qin frame 3.

2, Dynamics keyboard as claimed in claim 1 is characterized in that responding to printed board 4 and comprises inductive coil L on the palisade induction bar 6, resistance R ₁, R ₂, semifixed resistor R ₃, output interface 7 and the four high guaily unit 5 that constitutes by 4 element circuits 8.

3, Dynamics keyboard as claimed in claim 2 is characterized in that 9 of element circuit 8 and sounding circuits also are connected to one by diode D ₂, resistance R ₄, contact K and can replace the diode D of transistor BG in the sounding circuit 9 ₁The system sound circuit 10 that constitutes.

4, Dynamics keyboard as claimed in claim 2 is characterized in that responding to the semifixed resistor R in the printed board 4 ₃Standard resistance range is 100-1K Ω.