CN113628599A

CN113628599A - Foldable music keyboard

Info

Publication number: CN113628599A
Application number: CN202110804363.0A
Authority: CN
Inventors: 张鹏; 邹枘珂; 马浩森
Original assignee: Sun Yat Sen University
Current assignee: Sun Yat Sen University
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2021-11-09

Abstract

The invention discloses a flexible and foldable musical keyboard, which relates to the technical field of portable musical instrument design. The flexible and foldable musical keyboard includes a power module, a rigid module and a flexible module; the power module is used to supply power to the rigid module and the flexible module; the rigid module includes a rigid circuit board arranged on a rigid circuit board. The first circuit module on the device; the first circuit module includes a buzzer; the flexible module includes a second circuit module arranged on a flexible transparent substrate; the second circuit module includes a plurality of flexible resistors and node switches; One end of each flexible resistor is connected to a node switch; the flexible resistors are connected in series, and the node switches are connected in parallel. The flexible and foldable musical keyboard provided by the invention has a simple circuit structure, which can simplify the structure of the device, reduce the volume of the device and improve the portability.

Description

Foldable music keyboard

Technical Field

The invention relates to the technical field of portable musical instrument design, in particular to a foldable music keyboard.

Background

The hand roll piano is a flexible music keyboard, the existing hand roll piano mostly takes silicon rubber and ABS resin as materials, a sound box is arranged in the piano keyboard, and an interface can be connected to an independent sound box or an earphone. Can be used for practicing sound, fingering and hearing in places with narrow travel or space. However, in the conventional hand-roll piano, the circuit and the skeleton of the hand-roll piano are mostly made of alloy (such as copper-chromium-nickel), so that the equipment volume is large, the portability is poor, and the alloy (such as copper-chromium-nickel) material is expensive.

Disclosure of Invention

The invention aims to provide a flexible and foldable music keyboard, which can realize low-cost mass production and obtain a music keyboard with good flexibility.

In order to achieve the above object, an embodiment of the present invention provides a flexible and foldable music keyboard, including a power module, a rigid module, and a flexible module;

the power supply module is used for supplying power to the rigid module and the flexible module;

the rigid module comprises a first circuit module arranged on the rigid circuit board; the first circuit module comprises a buzzer;

the flexible module comprises a second circuit module arranged on a flexible transparent substrate; the second circuit module comprises a plurality of flexible resistors and a node switch; one end of each flexible resistor is connected with one node switch; the flexible resistors are connected in series, and the node switches are connected in parallel.

Preferably, the node switch includes a conductive thin film and an elastic body having one end adhered to the flexible transparent substrate and the other end adhered to the conductive thin film.

Preferably, the flexible foldable music keyboard further comprises a charging clip; one end of the charging clip is connected with the first circuit module, and the other end of the charging clip is clamped on the flexible transparent substrate; the conductive part of the charging clip is tightly connected with the second circuit module.

Preferably, the first circuit module further comprises a timer; the power supply module is connected with a VCC port of the timer; the buzzer is connected with the Q output end of the timer.

Preferably, the flexible resistor is formed by dropping conductive ink on the flexible transparent substrate and forming a film through slow drying.

Preferably, the conductive film is formed by adding several kinds of ionic solutions with preset concentrations into an aqueous solution to obtain a conductive ink with high conductivity, dripping the conductive ink on a transparent substrate, and slowly drying to form a film.

Compared with the prior art, the invention has the following beneficial effects:

the circuit of the invention has simple structure, can simplify the structure of the equipment, reduce the volume of the equipment and improve the portability;

the conductive film provided by the invention is formed by adding a plurality of ionic solutions with preset concentrations into an aqueous solution to obtain conductive ink with high conductivity, dripping the conductive ink on a transparent substrate, and slowly drying to form a film. The conductive ink material is degradable and has good biocompatibility.

The flexible resistor provided by the invention is formed by dripping conductive ink on the flexible transparent substrate and slowly drying to form a film. PSS can be selected as the conductive ink, so that the product has a transparent appearance, and is more exquisite and attractive compared with a traditional hand-rolled piano.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a flexible and foldable musical keyboard according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a circuit structure of a flexible and foldable music keyboard according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a node switch in a flexible and foldable music keyboard according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that the step numbers used herein are for convenience of description only and are not used as limitations on the order in which the steps are performed.

It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a flexible and foldable music keyboard according to an embodiment of the present invention. The embodiment of the invention provides a flexible and foldable music keyboard, which comprises a power module 1, a rigid module 2 and a flexible module 3;

the power module 1 is used for supplying power to the rigid module 2 and the flexible module 3;

the rigid module 2 comprises a first circuit module 22 arranged on a rigid circuit board 21; the first circuit module 22 includes a buzzer 221;

the flexible module 3 comprises a second circuit module 32 disposed on a flexible transparent substrate 31; the second circuit module 32 comprises a plurality of flexible resistors 321 and node switches; one end of each flexible resistor 321 is connected to a node switch; the flexible resistors 321 are connected in series, and the node switches are connected in parallel.

Preferably, the node switch includes a conductive film 322 and an elastic body 323 (shown in fig. 3), and one end of the elastic body 323 is adhered to the flexible transparent substrate 31 and the other end is adhered to the conductive film 322.

Preferably, the flexible foldable music keyboard further comprises a charging clip 4; one end of the charging clip 4 is connected with the first circuit module 22, and the other end is clamped on the flexible transparent substrate 31; the conductive part of the charging clip 4 is tightly connected to the second circuit module 32.

In this embodiment, the charging clip is an alligator clip with a smooth interface, and can sufficiently contact with the conductive film to prevent contact failure.

Preferably, the first circuit module 22 further comprises a timer 222; the power module 1 is connected to a VCC port of the timer 222; the buzzer 221 is connected to the Q output of the timer 222.

Preferably, the flexible resistor 321 is formed by dropping conductive ink on a flexible transparent substrate, and forming a film through slow drying.

Preferably, the conductive film 322 is formed by adding several kinds of ionic solutions with preset concentrations into an aqueous solution to obtain a conductive ink with high conductivity, dropping the conductive ink on a transparent substrate, and slowly drying to form a film.

In one embodiment, the power module 1 is a DC power source, and includes a positive power source and a negative power source 2, the power module 1 is connected to the rigid module 2 via a wire according to the circuit shown in FIG. 1,

the rigid module 2 comprises a first circuit module 22 arranged on a rigid circuit board 21; the first circuit module 22 includes a buzzer 221; the rigid circuit board 21 is a bread board or a PCB board.

The flexible resistor 321 is formed by dropping conductive ink on a flexible transparent substrate and slowly drying the conductive ink to form a film. Specifically, the conductive ink (such as PEDOT: PSS) is dripped on a flexible transparent substrate (such as a PET plate) by using the processes of dripping, spin coating and the like, and the flexible transparent substrate is slowly dried at room temperature to form a film and cut into a flexible resistor with the required resistance.

In one embodiment, the conductive ink with low conductivity is obtained by doping or the like, the conductive ink is dropped on a flexible transparent substrate, a film is slowly formed in a room temperature or low temperature oven, and finally, a conductive film with the required resistance is obtained by cutting or wiping with an organic solvent (such as ethanol) to be used as the flexible resistor.

The conductive thin film 322 is formed by adding a plurality of ionic solutions with preset concentrations into an aqueous solution to obtain a conductive ink with high conductivity, dripping the conductive ink on a transparent substrate, and slowly drying to form a film. Specifically, high-conductivity conductive ink is obtained by doping different ionic solutions in different concentrations in an aqueous solution, a film is formed on a transparent substrate by means of drop coating, and the transparent substrate is cut into a conductive film with a required shape.

In one embodiment, a conductive ink with high conductivity is obtained by adding several ionic solutions with preset concentrations into an aqueous solution, the conductive ink is dripped on a flexible transparent substrate, a film is slowly formed in an oven at room temperature or low temperature, and finally a conductive film with a required shape is obtained by cutting or wiping with an organic solvent (such as ethanol) and is used for connecting each part of a circuit.

In this embodiment, the elastic body is a sponge having a thickness of about 2mm, and one end of the elastic body is adhered to the flexible transparent substrate 8 and the other end is adhered to the conductive film 9, thereby forming the key.

Referring to fig. 2, fig. 2 is a schematic circuit structure diagram of a flexible and foldable music keyboard according to an embodiment of the present invention. In this embodiment, the timer 222 of the first circuit module 22 is a 555 timer, and the power module 1 is connected to the VCC port of the timer 222; the buzzer 221 is connected to the Q output of the timer 222. The direct current signal is converted into an alternating current signal through the oscillating circuit, the circuit is connected with the buzzer, the resistors and the capacitors in a set mode, and the frequency of the oscillating circuit is changed by changing the sizes of the resistors and the capacitors connected into the circuit.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. a flexible foldable musical keyboard, is characterized in that, comprises power module, rigid module and flexible module;

The power module is used for powering the rigid module and the flexible module;

The rigid module includes a first circuit module arranged on a rigid circuit board; the first circuit module includes a buzzer;

The flexible module includes a second circuit module arranged on a flexible transparent substrate; the second circuit module includes a plurality of flexible resistors and node switches; one end of each flexible resistor is connected to a node switch; the flexible resistors are connected in series , the node switches are connected in parallel.

2 . The flexible and foldable musical keyboard according to claim 1 , wherein the node switch comprises a conductive film and an elastic body, one end of the elastic body is adhered to the flexible transparent substrate, and the other end is adhered to the flexible transparent substrate. 3 . the conductive film.

3. The flexible and foldable musical keyboard according to claim 1, further comprising a charging clip; one end of the charging clip is connected to the first circuit module, and the other end is clamped on the flexible transparent substrate; The conductive part of the charging clip is closely connected with the second circuit module.

4. The flexible and foldable musical keyboard of claim 1, wherein the first circuit module further comprises a timer; the power module is connected to a VCC port of the timer; the buzzer Connect to the Q output of the timer.

5 . The flexible and foldable musical keyboard according to claim 1 , wherein the flexible resistor is formed by dropping conductive ink on the flexible transparent substrate and slowly drying to form a film. 6 .

6 . The flexible and foldable musical keyboard according to claim 2 , wherein the conductive film is obtained by adding several kinds of ionic solutions with preset concentrations in an aqueous solution to obtain a conductive ink with high conductivity, and the Conductive ink is drop-coated on a transparent substrate and slowly dried to form a film.