CN2419647Y

CN2419647Y - Blackboard for teaching music

Info

Publication number: CN2419647Y
Application number: CN 00224910
Authority: CN
Inventors: 夏吉安
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-10
Filing date: 2000-05-24
Publication date: 2001-02-14
Anticipated expiration: 2010-05-24

Abstract

The utility model relates to a blackboard for teaching music. The utility model comprises a piano keyboard diagram, a staff diagram, a music circuit and a ferule which are arranged on a blackboard surface. The utility model is characterized in that the piano keyboard diagram and the staff musical alphabet position are provided with touch electrodes which are connected with the music circuit. The ferule is a conventional metal ferule without electric connection. The piano keyboard diagram and the staff diagram of the blackboard which can generate sound by touch is favorable for students to correctly master keyboard musical instruments and the elementary knowledge of the staff and to accurately understand the correlation of the keyboard musical instruments and the elementary knowledge of the staff. The fingering teaching of the keyboard musical instruments can be visually carried out. The conventional metal ferule is used, so the region of operation of teachers is unlimited, and a plurality of students can take part in the teaching activity of teachers on the same stand.

Description

A kind of music teaching blackboard

The utility model relates to a kind of music audio-visual education programme blackboard.

Existing music teaching blackboard, multiple version is arranged, the patent No. that has of better performances is the staff audio-visual education programme blackboard of 88204219x, it is by blackboard surface, be imprinted on the fingerboard figure on the blackboard surface, the staff table, be located at the locational stealthy lead of staff musical alphabet, be located at the light emitting diode on the fingerboard figure, be located at the function control panel on the blackboard surface, loudspeaker, be located at the music circuit at the blackboard back side, being provided with touch-switch on handle also forms with the teacher's pointer that lead links to each other with music circuit, though this blackboard has multiple music teaching demonstration function, but part also comes with some shortcomings: the one, because must pointing on the stealthy lead of staff musical alphabet position, charged teacher's pointer could constitute electric loop, and make the staff sounding.This tune operation inconvenience describes to occur giving directions not in place and situation can not sounding; 2, can only be staff sounding and keyboard can not take place, be unfavorable for that the student correctly grasps the ABC of keyboard instrument and staff and accurately understands its mutual relationship.The particularly content of courses of all having enrolled keyboard instrument (as piano, accordion, mellotron) in existing China regular primary and secondary schools music teaching material, and the play fingering of keyboard instrument is basic Training Skills content, though can not carry out the fingering teaching of keyboard instrument intuitively on existing music audio-visual education programme blackboard; 3, teacher's pointer links to each other with electric wire with circuit board, uses very inconveniently, has greatly limited teacher's action freedom and scope of activities, is unfavorable for carrying out easily teaching; 4, can only people of teacher impart knowledge to students on blackboard, the student can not participate in simultaneously, is unfavorable for carrying out teaching livelyly; 5, adopt special-purpose teacher's pointer, repair and replacement are inconvenience very.

The purpose of this utility model is to disclose a kind of keyboard, staff all can touch sounding, and can on keyboard, carry out fingering teaching, teacher's pointer need not touch music teaching blackboard that lead is connected, that can use the common metal teacher's pointer, that Faculty and Students can demonstrate on the same stage with circuit board.

Technical solution of the present utility model is: a kind of music teaching blackboard, comprise blackboard surface, be located at fingerboard figure, the staff figure on the blackboard surface, the music circuit that is located at the blackboard back side, teacher's pointer, its special character is that said fingerboard figure is provided with the touch electrode that links to each other with music circuit, and said teacher's pointer is the common metal teacher's pointer that need not to be electrically connected.

The musical alphabet position of staff figure in the utility model technical solution is provided with the touch electrode that links to each other with music circuit.

Music teaching blackboard of the present utility model has the following advantages owing to having adopted above technical scheme to compare with existing like product: 1, fingerboard figure, staff figure can touch sounding.Help the student and correctly grasp the ABC of keyboard instrument and staff and accurately understand its mutual relationship, and can carry out the fingering teaching of keyboard instrument intuitively; 2, teacher's pointer need not to be electrically connected, and teacher's actuating range is unrestricted like this, can several students appear on the stage simultaneously simultaneously, uses many teacher's pointers to participate class activities together with the teacher, does music teaching very impressively, and is lively; 3, adopt the common metal teacher's pointer cheap, need not maintenance, be easy to change.

Accompanying drawing 1 is a shape assumption diagram of the present utility model;

Accompanying drawing 2 is a touch electrode installation diagram of the present utility model;

Accompanying drawing 3 is the utility model music circuit block scheme;

Accompanying drawing 4 is this real new type of metal teacher's pointer synoptic diagram;

Accompanying drawing 5 is the utility model music circuit structural drawing;

Below in conjunction with embodiment the utility model is further described.A kind of music teaching blackboard, by blackboard surface [1], be printed on fingerboard [2], staff figure [3] on the blackboard surface [1], be located at loudspeaker [4], function control panel [8] on the blackboard surface [1], the music circuit [13] and the teacher's pointer [18] that are located at the blackboard back side are formed, on each key position of fingerboard figure, be provided with light emitting diode [5], be characterized on fingerboard key position, being provided with touch electrode [6], can also be provided with touch electrode [6] in the corresponding musical alphabet position of staff simultaneously.The available hot melt adhesive of touch electrode [6] [12] is fixed on the blackboard surface, the lead [10] of touch electrode [6] passes and is located at the aperture that touches below the electroplax [6] and links to each other with music circuit [13], light emitting diode [5] is located at the middle and upper part of fingerboard key position, and links to each other with circuit board [13] by lead [11].Be provided with blackboard frame [7] around the blackboard surface.Music circuit [13] is provided with monostable touch circuit [16], output terminal at circuit [16] is provided with source of sound figure circuit [17], output terminal at circuit [17] is provided with audio amplifier circuit [15], the output terminal of circuit [15] links to each other with loudspeaker [4], function control panel [8] links to each other with circuit [17] by lead [19], touch electrode [6] links to each other with circuit [16] by lead [10], the power supply of music circuit [13] is supplied with by power circuit [14], power circuit [14] be input as the 220V alternating current, be output as the 12V direct current, circuit adopts conventional rectification circuit.The quantity of touch electrode [6], according to how much deciding of fingerboard key number, each key position is provided with a touch electrode, generally establishes 24, and the touch electrode on the staff figure is generally established 12 or 24.Staff figure can establish 4 row, and last two row are used for mark, and two row are used to be provided with touch electrode down.The concrete structure of music circuit [13] touches circuit by: monostable and touches circuit units by several monostables and is formed, if n touch electrode arranged, must supporting n road touch circuit, and just can make n scale sounding, n key position demonstration lumination of light emitting diode.Each unit is made up of one 555 time base circuit, what it was concrete electrically connects as: pin 1 ground connection, pin 5 is by C3 ground connection, pin 2 is touched electrode [6] by the C1 contact, pin 7 connects power supply by R1 simultaneously by C2 ground connection, pin 8, pin 4 connect power supply, and pin 3 connects the corresponding pin of source of sound figure circuit position 1, and each monostable touches the corresponding pin position of circuit unit.Light emitting diode [5] upper end pin 3, the lower end is by R2 ground connection.Monostable touches circuit chip can adopt CMOS gate circuit or LM324 operational amplifier.Source of sound figure circuit adopts the KD-22 integrated circuit, and its pin 23 connects power supply, pin 24 ground connection, and pin 25～30 is by lead [19] connection function control panel [8], and pin 31 connects audio amplifier circuit [15] by C4.Circuit [15] adopts the AN7130 integrated circuit, and its pin 9 connects power supply, pin 2 ground connection, and pin 1 connects loudspeaker.Music circuit [13] also can adopt other prior art circuits form.Electricity work principle of the present utility model is: 2 pin of 555 time base circuits are in vacant state at ordinary times, 3 pin output low levels, and the key position shows that light emitting diode [5] does not work, and scale circuit KD-22 is not triggered and does not have the output of scale signal, and loudspeaker is sounding not.When human finger or hand-held metal teacher's pointer [18] contact touch electrode [6], induced signal makes the upset of 555 time base circuits by 2 pin of time base circuit, the high level of 3 pin output makes the key position show that light emitting diode [5] is luminous, trigger scale circuit KD-22 output scale sound signal simultaneously, amplify the scale sound that loudspeaker YD is sent be triggered by audio amplifier circuit AN7130.After touch condition is removed, 2 pin of 555 time base circuits make circuit output return to peacetime state because of no human body clutter exists, 3 pin output low levels, and the key position shows that light emitting diode [5] extinguishes, the scale circuit also stops to export the scale sound signal because of no high level triggers, and loudspeaker is noiseless.The C3 that touches in the circuit [16] mainly plays anti-interference, anti-false triggering.R2 is the current-limiting resistance that the key position shows diode [5], and its value is by the size decision of VDD.The key that guarantees touch circuit [16] operate as normal is to adjust the numerical value of R1 and C2.Because the output state after 555 time base circuits are triggered has a time-delay T, the length of the product decision time-delay T of R1, C2, time-delay T ≈ 0.695R1C2.Here should select bigger R1 and less C2 for use, can make the T value accurate relatively like this.The T that will delay time is adjusted at 0.5～1 second can satisfy actual request for utilization.The utility model music teaching blackboard is except the aforementioned function of saying, also have various functions such as the demonstration of broadcast song, tone color control, rhythm control, harmony accompaniment, volume increase and decrease, recording, playback, startup synchronously, these functions are produced by circuit such as source of sound figure circuit and audio frequency amplifications by function control panel [8] control.

Claims

1, a kind of music teaching blackboard, comprise blackboard surface [1], be located at fingerboard figure [2], the staff figure [3] on the blackboard surface, the music circuit [13] that is located at the blackboard back side, teacher's pointer [18], it is characterized in that said fingerboard figure is provided with the touch electrode [6] that links to each other with music circuit, the common metal teacher's pointer of said teacher's pointer [18] for need not to be electrically connected.

2, a kind of music teaching blackboard according to claim 1 is characterized in that being provided with in the musical alphabet position of staff figure the touch electrode [6] that links to each other with music circuit [13].

3, a kind of music teaching blackboard according to claim 1 and 2 is characterized in that touch electrode [6] usefulness hot melt adhesive glue is on the fingerboard figure key position and on the musical alphabet position of staff figure.

4, a kind of music teaching blackboard according to claim 1 and 2 is characterized in that said music circuit [13] is made up of monostable touch circuit [16], the source of sound figure circuit [17] that is located at circuit [16] output terminal, the audio amplifier circuit [15] that is located at circuit [17] output terminal.

5, a kind of music teaching blackboard according to claim 3 is characterized in that said music circuit [13], is made up of monostable touch circuit [16], the source of sound figure circuit [17] that is located at circuit [16] output terminal, the audio amplifier circuit [15] that is located at circuit [17] output terminal.