CN2231817Y

CN2231817Y - Portable miniature electronic musical instrument

Info

Publication number: CN2231817Y
Application number: CN 94230163
Authority: CN
Inventors: 顾昂
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-09-08
Filing date: 1994-09-08
Publication date: 1996-07-24
Anticipated expiration: 2004-09-08

Abstract

The utility model relates to a portable miniature electronic musical instrument, which is characterized in that all piano keyboards adopt key type structures. The utility model adopts three integrated circuit blocks LM4022 (IC1), CD4022 (IC2) and 74HC04 (IC3) in a circuit to realize the purpose of miniaturization of the volume and convenient carrying (the utility model can be put in a pocket.) The musical instrument not only has compact structure and complete function (has all the functions of the original toy electronic music instrument) but also has pure tone quality and graceful tone color. The musical instrument can be used as the musical instrument for enlightening and training the children's music and also be used as the article carried by the music lover, and gives person the good enjoyment of music at any time.

Description

The portable minisize mellotron

The utility model relates to a kind of electronic musical instrument---the portable minisize mellotron.Be about (0.5m) that present commercially available a kind of toy formula mellotron is a Table top type, its primary structure is to have adopted LM6402 mellotron special microprocessor and several triode resistance, electric capacity to form, because what it adopted is the strong formula button of qin, the function conversion is to adopt the sectional type selector switch, though also have the repertoire of LM6402 application specific processor, for example: characteristics such as the memory melody of 80 notes of recording playback and eight first demonstration pleasures.But volume is still bigger, is not easy to carry, and tonequality is also bad.

It is littler to the purpose of this invention is to provide a kind of volume, and (can be placed in the pocket) tonequality that is easy to carry is miniature electronic qin preferably also.

The object of the present invention is achieved like this:

For satisfying the needs of volume microminiaturization, key all adopts touch-tone scale key, function selecting key, rest key and ottava alta key, and is placed in the gap of scale key compactly.In order to finish above-mentioned function selecting mode, CD4022 and 74H,C04 two integrated packages in circuit, have been set up.

Describe its technical solution in detail below in conjunction with the embodiment accompanying drawing.

Fig. 1 is the panel synoptic diagram of miniature electronic qin.

Fig. 2 is the structural representation of miniature electronic qin.

Fig. 3 is the A-A cut-open view of miniature electronic qin.

Fig. 4 is the C-C cut-open view of miniature electronic qin.

Fig. 5 is the electrical schematic diagram of miniature electronic qin.

Fig. 6 is alternative function conversion table.

Fig. 7 is the wiring diagram of double-sided PCB (A) face.

Fig. 8 is the element arrangements figure of (A) face.

Fig. 9 is the wiring diagram of double-sided PCB (B) face.

Figure 10 is the element arrangements figure of (B) face.

Referring to Fig. 2, Fig. 3 and Fig. 4, its structure comprises: panel shell (3), bottom plate shell (4), Battery cover (5), switch (11), socket (8), indicator lamp (2) and button (9) etc. partly form. Its appearance forrns (seeing Fig. 1), wherein indicator lamp partly comprises four of M, R, P and A, presses Key partly comprise the scale key (N1～N25), rest key (No), function selecting key ( Ns) and 28 on ottava alta key (Nh) etc.; Circuit board and element consist of (6), conductive rubber (10), loudspeaker (1) and three joint SUM-4 type batteries (7) etc.

Fig. 5 is the circuit diagram of miniature electronic qin. Wherein the Y5 of IC2 (CD4022) end connects through R11 The Cr end makes it to become five cycle pulse distributors, and R11 forms the start of IC2 simultaneously with C5 Reset circuit; After the Y1 of IC2～Y4 end H1～H4 in IC3 (74HC04) is anti-phase, press respectively M, the R of IC1 (LM6402), P and A end and corresponding LED1 negative terminal; The H5 of IC3, H6 and R8, R9, C4 form multivibrator, and output is parallel to the LED1 anode through R10, when K is closed, Press five kinds of working methods that Ns can select IC1 successively, see for details shown in Fig. 6 form; Select The result is by corresponding LED flicker or all extinguish signal; R1, C1 are the start reset circuits of IC1, Its oscillator of the electric circuit constitute in C2, C3, R3JT and the IC1, K0～K3 and S0 among the IC1～S7 end is respectively the input and output side of scale matrix-scanning, but under No～N25 effect wink Between gating (effective when No only selects " 2 " in Fig. 6), the sound that is strobed when pressing Nh Rank are with the rising octave; Make the doorbell knob through the JC Nh extensible line in parallel with K and use, K is non-to be closed Effective when closing state.

Embodiment:, on project organization, make following several processing in order to finish its microminiaturized requirement:

1, the scale key (N1～N25) adopt with the key of standard qin formula musical instrument put in order identical, but the different button structure of outward appearance appearance, the black that color is also used according to standard qin formula musical instrument.See Fig. 1, Fig. 2 and Fig. 4.

2, set No, Ns also adopt and the identical button structure of scale key outward appearance appearance with the Nh key, and it is placed in the respective voids place of scale key left side and upper right side respectively, and color should adopt other color to show and above-mentioned difference mutually.Housing and indicator light colors can be chosen wantonly.

3, in Fig. 3, respective window potential difference 3mm up and down on loudspeaker and the panel shell, during actual the manufacturing, if the doorbell function of not establishing real figure, the respective socket part can be cancelled, loudspeaker position also can on move and eliminate its potential difference.

4, space in housing, upper end are battery cavities, and the lower-left end is settled loudspeaker and broadcast socket, and all the other space segments are settled element on circuit board and the plate, see Fig. 2.

5, circuit board is two-sided circuit printed panel, and A face lower end is the contact circuit of button part, and IC1～IC3 and other discrete component then are placed in A face upper end, left end and B face upper end respectively, see Fig. 7-10.

Present embodiment provides that a kind of circuit is simple, the portable minisize mellotron of circuit volume microminiaturization after above-mentioned processing.This qin is compact conformation not only, perfect in shape and function, small and exquisite slim and graceful, be easy to carry about with one, and tonequality is pure, the tone color grace, can cause people's entertainment interest (repertoire that possesses former toy mellotron) and novel psychology, if, can teach in pleasure with this training musical instrument as children's initiation, increase learning interest altogether, receive the effect of getting half the result with twice the effort.

Claims

1, a kind of miniature electronic musical instrument---portable minisize mellotron, its external structure includes: panel shell (3), bottom plate shell (4), battery cover (5), switch (11), socket (8), pilot lamp (2) (being M, R, P and A lamp) and key (9), inner structure includes: circuit board and electronic component (6), conductive rubber (10), loudspeaker (1) and three joint SUM-4 type type batteries (7)

It is characterized in that:

A) key (9) is that (N1～N25), function selecting key (NS), rest key (No) and ottava alta key (Nh) all adopt button to the scale key;

B) in circuit, be provided with integrated package: CD4022 (IC2) and 74HC04 (IC3).

2, portable minisize mellotron according to claim 1, it is characterized in that: the Y5 end of integrated package CD4022 meets capacitor C r through resistance R 11, make it to become five cycle pulse dividers, resistance R 11 is held after door H1-H4 is anti-phase with Y1～Y4 that capacitor C 5 forms the start reset circuit CD4022 of CD4022 simultaneously, insert M, R, P and the A end of LM6402 respectively, and the negative terminal of corresponding LED1-LED4, door H5-H6 and resistance R 8, R9, capacitor C 4 are formed multivibrator, and output signal is parallel to the anode of LED1-LED4 through resistance R 10.