阅读说明：本技术 一种内置集成电路驱动芯片的有源蜂鸣器 (Active buzzer with built-in integrated circuit driving chip ) 是由 张怀东 于 2020-06-11 设计创作，主要内容包括：本发明涉及一种内置集成电路驱动芯片的有源蜂鸣器,包括集成电路驱动芯片、电阻、单组电磁线圈、线路板、支架、磁环、振动片、正极针脚、负极针脚、壳体、密封胶,其中所述集成电路驱动芯片、电阻、正极针脚、负极针脚焊接在线路板上,集成电路驱动芯片电源连接电阻一端,电另阻一端连接正极针脚,集成电路驱动芯片地线连接负极针脚,单组电磁线圈一端连接正极针脚,单组电磁线圈另一端连接集成电路驱动芯片的输出端,所述集成电路驱动芯片内部包含振荡电路、整流电路、驱动电路,电阻起到防反接的作用。本产品的技术方案具有防反接、启动电压低、和成本低的优点。(The invention relates to an active buzzer with a built-in integrated circuit driving chip, which comprises an integrated circuit driving chip, a resistor, a single group of electromagnetic coils, a circuit board, a support, a magnetic ring, a vibrating reed, an anode pin, a cathode pin, a shell and sealant, wherein the integrated circuit driving chip, the resistor, the anode pin and the cathode pin are welded on the circuit board, a power supply of the integrated circuit driving chip is connected with one end of the resistor, one end of an electric resistor is connected with the anode pin, a ground wire of the integrated circuit driving chip is connected with the cathode pin, one end of the single group of electromagnetic coils is connected with the anode pin, the other end of the single group of electromagnetic coils is connected with the output end of the integrated circuit driving chip, the integrated circuit driving chip internally comprises an oscillating circuit, a rectifying. The technical scheme of the product has the advantages of reverse connection prevention, low starting voltage and low cost.)

1. An active buzzer with an integrated circuit driving chip built in comprises the integrated circuit driving chip, a single group of electromagnetic coils, a resistor, a circuit board, a support, a magnetic ring, a vibrating piece, an anode pin, a cathode pin, a shell and sealant.

2. The active buzzer with the built-in integrated circuit driving chip as claimed in claim 1, wherein the integrated circuit driving chip, the resistor, the positive pin and the negative pin are soldered on the circuit board.

3. The active buzzer with the built-in integrated circuit driving chip as claimed in claim 1, wherein the power end of the integrated circuit driving chip is connected with one end of a resistor, the other end of the resistor is connected with a positive pin, the ground end of the integrated circuit driving chip is connected with a negative pin, one end of a single group of electromagnetic coils is connected with the positive pin, and the other end of the single group of electromagnetic coils is connected with the output end of the integrated circuit driving chip.

4. The active buzzer with the built-in integrated circuit driver chip as claimed in claim 1, wherein said integrated circuit driver chip has three pins, which are power terminal, ground terminal and output terminal.

5. The active buzzer with the built-in integrated circuit driving chip as claimed in claim 1, wherein said integrated circuit driving chip internally comprises an oscillating circuit, a rectifying circuit and a driving circuit.

6. The active buzzer with the built-in integrated circuit driving chip as claimed in claim 1, wherein the resistor plays a role of current limiting to achieve the purpose of reverse connection prevention, the reverse connection prevention means that the buzzer is not damaged when a pin of a positive electrode of the buzzer is connected with a negative electrode of the direct current power supply and a pin of a negative electrode of the buzzer is connected with a positive electrode of the direct current power supply within the normal operating voltage range of the buzzer.

7. The active buzzer with an integrated circuit driver chip built-in as claimed in claim 1, wherein said integrated circuit driver chip is an integrated circuit using silicon material.

Technical Field

The invention relates to an electromagnetic buzzer, in particular to an active buzzer with a built-in integrated circuit driving chip.

Background

Most of the existing electromagnetic type active buzzers still use triodes to form a double-set electromagnetic coil structure of a driving circuit, and have the defects of high cost, low reliability and the like; the single-group electromagnetic coil structure adopting the chip as the driving circuit also has the defects of high starting voltage, no reverse connection, high cost, low reliability and the like.

Disclosure of Invention

The invention aims to reduce the cost and the volume and solve the defects of high starting voltage, no reverse connection and the like when an integrated circuit chip is used as an active buzzer driving circuit.

In order to solve the problems, the invention provides an active buzzer with an integrated circuit driving chip built-in, which comprises the integrated circuit driving chip, a resistor, a single group of electromagnetic coils, a circuit board, a support, a magnetic ring, a vibrating piece, an anode pin, a cathode pin, a shell and sealant, wherein the integrated circuit driving chip, the resistor, the anode pin and the cathode pin are welded on the circuit board, a power supply end of the integrated circuit driving chip is connected with one end of the resistor, one end of an electric resistor is connected with the anode pin, a ground wire end of the integrated circuit driving chip is connected with the cathode pin, one end of the single group of electromagnetic coils is connected with the anode pin, the other end of the single group of electromagnetic coils is connected with an output end of the integrated circuit driving chip, and the integrated circuit.

The reverse connection prevention of the buzzer means that a pin of the anode of the buzzer is connected with a direct current cathode within the normal working voltage range of the buzzer, and the buzzer cannot be damaged when a pin of the cathode of the buzzer is connected with the direct current anode. When the buzzer is reversely connected, namely the positive pin of the buzzer is connected with the direct current negative electrode, and the negative pin of the buzzer is connected with the direct current positive electrode, the resistor limits the current flowing through the integrated circuit driving chip, so that the chip and a system using the buzzer are prevented from being damaged.

When the pin of the positive electrode of the buzzer is connected with the direct current positive electrode, and when the pin of the negative electrode of the buzzer is connected with the direct current negative electrode, the direct current positive electrode supplies power to the integrated circuit driving chip through the resistor, the integrated circuit drives the internal oscillating circuit of the chip to work, and outputs a certain frequency signal to drive the single group of electromagnetic coils through the output end OUT through the driving circuit, so that the buzzer makes a sound, and the frequency of the sound is determined by the frequency of the internal oscillating circuit of the integrated circuit driving chip.

Because the direct current positive electrode supplies power to the integrated circuit driving chip through the resistor, the starting voltage of the internal circuit of the integrated circuit driving chip is lower than the starting voltage when the direct current positive electrode indirectly supplies power to the integrated circuit driving chip, for example, the starting voltage is about 0.5V lower than the starting voltage for supplying power to the integrated circuit driving chip through the diode, and therefore the integrated circuit driving chip has the advantage of low-voltage starting.

In order to further save cost, the integrated circuit driving chip is an integrated circuit using silicon material.

In conclusion, the invention has the following beneficial effects: an active buzzer with a built-in integrated circuit driving chip has the advantages of low starting voltage, reverse connection prevention and low cost.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a circuit schematic of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the invention provides an active buzzer with an integrated circuit driving chip built-in, which includes an integrated circuit driving chip 10, a resistor 11, a single group of electromagnetic coils 5, a circuit board 6, a bracket 3, a magnetic ring 4, a vibrating reed 2, an anode pin 8, a cathode pin 9, a shell 1, and a sealant 7.

In actual installation, as shown in fig. 1, the integrated circuit driving chip 10, the resistor 11, the positive pin 8 and the negative pin 9 are soldered on the circuit board 6.

Referring to fig. 2, in conjunction with fig. 1, the circuit connection relationship is: the power supply of the integrated circuit driving chip 10 is connected with one end of a resistor 11, the other end of the resistor 11 is connected with an anode pin 8, the ground wire of the integrated circuit driving chip 10 is connected with a cathode pin 9, one end of a single group of electromagnetic coils 5 is connected with the anode pin 8, and the other end of the single group of electromagnetic coils 5 is connected with the output end of the integrated circuit driving chip 10.

The direct current positive pole supplies power to the integrated circuit driving chip 10 through the resistor 11, and the buzzer has the advantages of reverse connection prevention and low starting voltage.

In conclusion, the invention has the following beneficial effects: an active buzzer with a built-in integrated circuit driving chip has the advantages of reverse connection prevention, low starting voltage and low cost.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.