CN2605622Y

CN2605622Y - Staff reader

Info

Publication number: CN2605622Y
Application number: CN 02251199
Authority: CN
Inventors: 张希重
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-13
Filing date: 2002-12-13
Publication date: 2004-03-03
Anticipated expiration: 2012-12-13

Abstract

The utility model discloses a staff recognizer, it is by the box body through the inside integrated circuit board of lead wire connection constitution, the key is recognized by the note duration to the distribution on the panel, the key is recognized to the rest duration, staff scale indicator key, staff contrast key and inflection mark key, this device uses blackboard, picture in the teaching, only need the student operate in person, play the song, with the staff button alright with the audio-visual staff of discerning of image, changed the boring tasteless situation of present music teaching, strengthened the enjoyment that the student went on the music class, the utility model discloses simple structure, convenient to use, it is with low costs, can extensively promote in well, primary school's classroom.

Description

Staff is recognized and is read device

Technical field:

The utility model relates to a kind of staff to be recognized and reads device, belongs to music teaching utensil class.

Background technology:

Music is brought beautiful enjoyment to the people, can edify people's thinking again, extremely student's welcome of music teaching in school instruction, but how music teaching imparts knowledge to students with chalk, blackboard, card figure etc. at present, make a lot of students not too interested in the staff phonetic symbol, though it is thereby Most students has in arms the very big interest of music is learnt, and is last simple, uninteresting because of teaching method eventually, really idle and return.

The utility model content:

The purpose of this utility model is that a kind of staff of providing in order to overcome above-mentioned shortcoming is recognized and read device, this device image, directly perceived, only need remember during use and use numbered musical notation, just can drill according to key and gather out beautiful interesting to listen to various music, in the performance panel can directly demonstrate again numbered musical notation the syllable of corresponding staff.On the surface-mounted integrated circuit RC phase shift oscillator is arranged in the described box body, frequency-variable controller, beat display and note amplifier four parts are formed.

The utility model is to realize like this.

It links by rectangular box body and by lead-in wire and surface-mounted integrated circuit in the box body and forms, and indicates the note duration and recognize and read indication key, rest duration and recognize and read key, the humorous indication key of staff sound, simple line spectrum pair and shine key, change voice mark key and power switch on its box body panel.

Described note duration is recognized and is read indication key, be positioned at the rectangle box body, directly over the panel, this key is established five notes, be communicated with light emitting diode in the circuit board by power supply, the rest duration is recognized and is read key and be positioned at the duration of box body panel note and recognize and read indication key below, link by five switches in the circuit and current-limiting resistance and light emitting diode, staff scale indication key is positioned at the panel middle part and links by circuit and frequency changer circuit, it is right-hand that the letter line spectrum pair is positioned at panel according to key, and the mark key of changing voice is arranged in the panel left and the frequency changer circuit oscillator links, and power switch is positioned at the panel lower left, one end links six volts of direct supplys, and the other end is connected with whole wiring board.

The utility model is simple to operate, is easy to carry, and passes through operation personally the teaching middle school student, vision no matter, still the sense of hearing can both motivate students' interest in learning, and passes through button operation repeatedly during use, has closely strengthened the cognitive ability to staff, overcome uninteresting, the teaching of tasteless staff makes it to become vivaciously interesting, and the student can drill arbitrarily in the keyboard top and gather the song of oneself liking, transfer the enthusiasm of study thus, make teaching efficiency be able to obvious raising.

Description of drawings:

Fig. 1 the utility model panel construction synoptic diagram.

Fig. 2 the utility model box body internal circuit schematic diagram.

Loudspeaker 1, treble clef 2 among Fig. 1, the mark key 3 of changing voice, power light 4, power switch 5, note duration indication key 6, rest indication key 7, staff syllable indication key 8, numbered musical notation contrast key 9, note recognize read to indicate 10, rest recognize read to indicate 11, frequency changer circuit 14, note amplifier 13, RC phase shift oscillator 12, beat display 15 among Fig. 2, box thermometer 6, whole note indicator 17, crotchet indicator 19, quaver indicator 20, semiquaver indicator 21 are formed.

Embodiment:

The utility model is provided by following examples, is illustrated below in conjunction with accompanying drawing.

Form by a lead-in wire and a surface-mounted integrated circuit in the box body by box body 16 among Fig. 1.Note is recognized and is read indication (10), and when starting working by note switch (15) Fig. 2 energized circuit, by the umber of beats of light emitting diode indication pronunciation symbol, circuit is exported a cadence signal simultaneously, gives note amplifier and sends metronome by loudspeaker.

Rest recognize read the indication (among Fig. 1) 11, when touching arbitrary rest, pilot lamp sends light, panel has the corresponding length of stopping.

The circuit of changing voice is finished by frequency changer circuit (14), and it can change the vibration that RC oscillator 12 produces, but basic syllable is constant, makes the student can grasp the title and the effect of the mark of changing voice.

The effect of note amplifier 13 is made up of low-frequency amplifier and power amplifier, and it is mainly amplified input signal.

The frequency of RC oscillator 13 these oscillators is subjected to scale resistance and the circuit of changing voice is controlled.

Electrical signal conversion after loudspeaker will amplify becomes sound.

Principle of work of the present utility model is:

It is that four parts such as RC phase shift oscillator 12, frequency conversion amplifying circuit device 14, beat indicator 15, audio-frequency power amplifier 13 are housed on surface-mounted integrated circuit successively for Fig. 2, and this circuit communicates with the panel indication key.Circuit RC phase shift oscillator 12 is by IBG ₁, IBG ₂Constitute the RC phase shift oscillator, BG ₁Effect be to improve BG ₂Input resistance, after making oscillation frequency become positive and negative feedthrough to cross the RC branch road, with BG ₂180 ° of the alternating voltage phase shifts of collector, oscillator frequency is changed by the scale resistance R, and scale resistance is 38.R wherein ₁-R ₁₉Be staff scale resistance, R ₂₀-R ₃₈Be numbered musical notation roll call resistance.The phoneme of staff syllable 8 is two groups of totally 19 sounds.As touch a on the panel ¹A during note ¹Resistance is connected oscillator generation this moment K40H2 signal by switch and RC circuit, is sounded by loudspeaker after the power amplification of audio frequency.

Its effect of frequency-variable controller 14 is the oscillation frequency that is used for changing RC, but scale do not change, its objective is allow the student understand and grasp to change voice mark (" # " rise mark " b " fall mark,

The reduction mark)

Frequency-variable controller 14 is by two relays, and two transistors and 9 resistance are formed, and comes the resistance of changing voice of control of conversion circuit by the break-make of relay, when touching the well mark, by the 2R in the circuit ₁Provide bias current to make 2BG to 2BG ₁Conducting, relay 2JK ₁Adhesive, armature of relay F ₁With normally opened contact E ₁Connect, resistance 2R will change voice ₇Short circuit is increased the RC oscillator frequency, and each all sounds minor second that all raises on this moment panel when needs during with sound-reducing, is touched the mark of changing voice Reduction mark, K at this moment ₅₀The normally closed switch circuit power is cut off relay and discharges, and it is normal that circuit recovers, when touching " b " flat mark, and 2R ₄To 2BG ₂Provide bias current to make 2BG ₂Conducting, relay 2JK ₂Adhesive, relay iron F ₂With normally opened contact E ₂Connect, at this moment R ₇With R ₈Series connection has increased the resistance of the circuit of changing voice, and RC oscillator oscillation frequency reduces, and sounds all on the panel are also along with reducing the minor second (2R in the circuit ₃, 2R ₆After the relay adhesive, continue respectively to 2BG ₁, 2BG ₂Bias current is provided, makes relay keep attracting state).

Beat display 15 is made up of programme control circut and circulation driver, and circuit is started working and indicated institute by note by light emitting diode when by the note energized, and corresponding umber of beats reaches at the metronome that sends " click click ".Five notes are established five circuit altogether on the panel, use K switch ₃₉-K ₄₃Control whole note " O ", minim " P " crotchet " P " quaver respectively Semiquaver From each circuit, extract a signal and deliver in the audio-frequency power amplifier, make note in the indication umber of beats, in strong beat, send the bat sound of " click ".

Rest is recognized and is read to indicate 11 by the control of five switches, i.e. K ₄₄-K ₄₈Semibreverest Minimrest

Crotchet rest

Eight fens rests

Sixteenth rest

When touching K44, (semibreverest symbol) is by current-limiting resistance 4R ₁Provide certain current/voltage to light emitting diode, make D ₁₀-D ₁₄Luminous, indicate stop time K ₄₄, K ₄₅, K ₄₆, K ₄₇, K ₄₈Control semibreverest minimrest, crotchet rest, eight fens rests, the pilot lamp of sixteenth rest respectively, principle is the same.

Described staff is recognized and is read device and can select plank, scale board for use, and aluminium or plastic material are manufactured, the most handy engrating process of label symbol above the panel, also available copybook stick on top.

The utility model uses 6 volts of power supply power supplies of direct current.

Claims

1, a kind of staff is recognized and is read device, form by rectangle box body (16) and by the box body internal integrated circuit plate that lead-in wire connects, it is characterized in that being furnished with on the described box body panel note duration recognizes and reads indication key (6), the rest duration is recognized and is read key (7), staff scale indication key (8), the letter line spectrum pair is according to key (9), the mark key (3) of changing voice, power switch (5), wherein the note duration recognize read indication key (6) be positioned at rectangle box body (16) panel directly over, this key is established five notes, be communicated with light emitting diode in the circuit by power supply, the rest duration is recognized and is read key (7) and be positioned at the duration of box body panel note and recognize and read indication key (16) below, link by five switches in the circuit and current-limiting resistance and light emitting diode, staff scale indication key (8), be positioned at the panel middle part, link by circuit and frequency changer circuit (14), the letter line spectrum pair is according to key (9), it is right-hand to be positioned at panel, the mark key (3) of changing voice is positioned at the panel left, link with oscillator in the frequency changer circuit (14), power switch (5) is positioned at panel lower left one end and connects 6 volts of direct supplys, and the other end is connected with whole wiring board.

2, a kind of staff according to claim 1 is recognized and is read device, it is characterized in that: be furnished with RC phase shift oscillator (12) on the described surface-mounted integrated circuit, frequency-variable controller circuit (14), beat display (15) and note amplifier (13), four parts, this circuit communicates with the panel indication key.