GB2243239A

GB2243239A - Electric control circuit for a violin musical toy

Info

Publication number: GB2243239A
Application number: GB9008974A
Authority: GB
Inventors: Yug-Lo Yang
Original assignee: YANG YUG LO
Current assignee: YANG YUG LO
Priority date: 1990-04-21
Filing date: 1990-04-21
Publication date: 1991-10-23
Also published as: GB9008974D0

Abstract

An electric control circuit for a violin and in particular to one having an electric control circuit to manage music output. When a switch is placed at 'AUTO' position, the violin will output a presetted music, when the switch is placed at 'MANUAL', the violin will output a tone whatever the key a player pressed. <IMAGE>

Description

TITLE: ELECTRIC CONTROL CIRCUIT FOR A VIOLIN MUSICAL TOY BACKGROUND OF THE INVENTION Violin musical toys have long been in the market and are always one of the most popular tolls that both parents and children like to have at home because of its educational and entertainment purposes.

It is therefore, an object of the inventor to produce a violin musical toy which may select 'AUTO' or 'MANUAL' output to achieve both recreational and educational purposes.

PRIOR ART Prior art using an engaging member to trigger the musical instrument to output a presetted song.

However, there are some inconveniences that exist, such as : A. The engaging member of prior art has to provide enough force to engage the musical circuit to output a presetted music. B. The prior art can only output presetted music and can not output chromatic scale and therefore lacks of creativity.

SUMMARY OF THE INVENTION It is the primary object of the present invention to provide an electric control circuit for a violin musical toy which is an educational musical to that children can play their own rhythm.

It is another object of the present invention to provide an electric control circuit for a violin musical toy which is an entertainment musical toy that can amuse both parents and children.

It is still another object of the present invention to provide an electric control circuit for a violin musical toy which is easy to play by children the presetted music.

It is a further object of the present invention to provide an electric control circuit for a violin musical toy which is inexpensive to produce.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a fragmentary perspective view of the present invention; FIG. 2 is a perspective view of the present invention; FIG. 3A and 3B are two front cross-sectional view of keys of the present invention; FIG. 4A and 4B are two front cross-sectional view of the trigger portion of the present invention; and FIG. 5 is the control circuit of the present invention.

DETAILED DESCRIPTION OF THE DRAWINGS Reference is now made to the drawings and in particular to FIG. 1 thereof, whereas the present invention comprises a cover 1 having a bulgy portion 10 at its front, a bridge 11 at its rear end, several string plates 12 placed on top of the bulgy portion 10 and the bridge 11, several key holes 13, a song selecting switch 16 and two square holes 14 to accommodate a left protuberance 17 and a right protuberance 18, several posts extended rearwards from said square holes 14 for securing a board 31, and a selecting switch 15 on said cover 1; a body 2 having several posts 20 to connect the cover 1 to the body 2, a groove 21, a battery container 22, a speaker 23, a circuit board 5, a key board 24 which has several contact points 25 each of which is in symmetrical with the key holes 13 of the cover 1; two micro switches 3 are formed with two rubber isolators 30, two contacting plates 31, two conductors 32 underneach the rubber isolators 30 (shown in FIG. 4A) controlled by a left and a right strings 17 and 18 and several conducting points 33; a series of keys 4 placed on top of a rubber isolator 40 which has several conducting parts 41 (shown in FIG. 3A and 3B) that bulged out of the rubber isolator 40, each of the bulged out conducting parts is in symmetrical with the keys 4 and the contact points 25 of the key board 24; a control circuit 5 connected with the selecting switch 1, song selecting switch 16, speaker 23, micro switches 3 and key 4; and a bow 6 placed on top of the left and right strings 17 and 18.

Reference is now made to FIG. 2, which is a perspective view of the present invention. The assembling procedures are as follows; firstly, stick the left and right strings 17 and 18 out through the square hole 14 of the cover 1, place the rubber isolators 30 on the contact plate 31 with the conductor 32 in symmetrical to the conducting point 33 and screw the contact plate 31 on the posts 19 of the cover 1.

Secondly, place the control circuit D X speaker 23 and the key board 24 in the groove 21 of the cover 1 and connect the contact plate 31, the speaker 23 and the key board Z to the control circuit 5 and place battery in the battery container 22. Lastly, stick hexes 4 out of the key'holes 13 of the cover 1, and place the rubber isolator 40 on top of the key board 24 and screw the posts 20 to connect the cover 1 and the body 2 together.

Under the normal condistions, the conducting parts 41 underneath the rubber isolator 40 is separate from the contact points 25 of the key board 24 (shown as FIG.

3B). When any one key of the keys 4 is pressed (shown in FIG. 3A), this key 4 will squeeze the rubber isolator 40 and the conducting parts 41 underneath the rubber isolator 40 will touch the contact points 25 of the key board 24. At this moment, the 12th foot of an integrated circuit (IC2) (shown in FIG. D ) receivers a tone in signal produced from a resister R and a capacitor C5.Thus when each key of the kes 4 is pressed, a different tone in signal will be input through the 12th foot into the IC2. Please refer to FIG. 4B and tA, when repeatly drawing the bow 6 on the left/right strings 17 and 18, said strings will press the rubber isolators 30 and change its shape then the conductor 32 underneath the rubber isolators 30 will touch the conducting points 33 of the contacting plates 31 and turn on the micro switch 3 and the power supply VDD, in the meantime, is triggered and transmitted through a diode D1 into the 6th foot of the IC2.

When the selecting switch 15 is placed at 'MANUAL' position, power VDD will be transmitted to the foot 13 of the IC2 and foot 8 of the IC1, and will output a high level signal to the 3rd foot of the musical integrated circuit 50 through the song selecting switch 16, a capacitor C3 and a resistor R2. The musical IC 50 will then, output a high level signal to the foot 1 of the IC 1 and to the foot 5 of the IC2. The IC1 will output a clock signal through the foot 4 to the foot 1 of the musical IC 50 which then, output a CLK/DV signal through foot 5 to the foot 1 of the IC 1. When selecting switch 15 is placed at manual and the ke 4 output a singal tone in signal to the foot 32 of the IC 2 which will output a high level signal through the foot 10, a resistor R8 to trigger a transister Q and output a mono sound through the speaker SP. If the selecting switch 15 is placed at 'AUTO' position, the power supply VDD input to the foot 2 of the 1C2 and combined with the CLK/DV signal that input from the musical IC 50 and output a signal from the foot 10 through the resistor R8 to trigger the transistor Q to output a series of presetted music through the speaker SP.

Claims

I CLAIM:

1. An electric control circuit for a violin musical toy comprising: a cover having a bulge portion and a bridge on its top and several key holes and a song selecting switch inbetween said strings of said bulgy portion, a square hole inbetween said bulgy and said bridge, a selecting switch; a body having a groove to accommodate a speaker, a control circuit, a contact plate and a battery container, said contact plate has several conducting points; a micro switch having several conducting points at its top and several conductors that each of which is in symmetrical to said conducting points; several keys are inserted through said holes of said cover;; a control circuit having two integrated circuits IC1 and IC2, a musical IC, a transistor, two diodes D1 and D2, several capasitors and several resistors, and said control circuit is connected seperately to said battery container, speaker, micro switch, song selecting switch, selecting switch and conducting point; and is characterized that when said micro switch is turned on, and said selecting switch is placed at 'AUTO' , power supply will input to the feet 6 and 2 of the said IC2 and said song selecting switch will output a signal through a capacitor C3 and a resistor R2 to foot 3 of said musical IC which then output said signal through foot 4 to the foot 1 of said IC1 and foot 5 of said IC2, upon receiving this signal, said IC1 will output a timing pulse signal to the foot 1 of said musical IC which then output a CLK/DV signal through foot 5 to the foot 1 of said IC2 which then output a high level signal through a resistor R8 to trigger said transistor to play a presetted music through said speaker; ; should said selecting switch is placed at 'MANUAL' position, power supply will input through the foot 8 into said IC1 and through foot 13 into said IC2, by pressing said key, a signal will be transmitted through a capacitor CS and a resistor R into the foot 12 of said IC2 then output a high level signal through foot 10 and resistor R8 to trigger said transistor to play the key tone;

2. An electric control circuit for a violin musical toy, as claimed in claim 1, wherein, said square hole of said cover is for installation of a left and a right strings which are pressed a bow is drawing on top of it.