TWM614251U - Buzzer structure with built-in low-frequency booster circuit - Google Patents

Abstract

The present invention is a buzzer structure with a built-in low-frequency booster circuit, which includes: a main housing; a piezoelectric sound sheet arranged on a first supporting flange of the main housing; and a driving circuit board, which It is arranged on the second supporting flange of the main casing, and the driving circuit board is provided with a low-frequency booster circuit, which has: a first charge pump, the input end of which is connected in series with a linear regulator, and the linear regulator is used for Receiving a first voltage; a second charge pump, the input terminal of which is used to receive a second voltage; and a double boost unit, the input terminal of which is used to receive a third voltage; wherein the first charge pump, the second The charge pump and the 2 times boost unit have a common output terminal.

Description

Buzzer structure with built-in low-frequency booster circuit

This model is a buzzer structure with a built-in low-frequency booster circuit, especially a buzzer structure with a built-in low-frequency booster circuit for traffic vehicles, industrial safety, commercial warning, or home safety warning.

The buzzer is an electronic buzzer that uses voltage to supply power and is widely used as a sounding device in electronic products such as computers, printers, copiers, alarms, electronic toys, automotive electronic equipment, telephones, timers, etc. The buzzer and the horn are different products. After the buzzer is powered on, it will emit a vibrating warning sound, which is used for anti-theft or other warning purposes.

Because the application field of buzzer is very wide, it needs different frequency response characteristics to cooperate with different application fields. For example, in underwater or diving applications, it needs to have better performance at low frequencies, but the conventional buzzer It is easy to have the problem of not being able to sound at low frequencies. Therefore, how to design a sound capable of sounding and having multiple levels and good frequency response at low frequencies has become an important issue.

The new model is a buzzer structure with a built-in low-frequency booster circuit, which is mainly to solve the problem of poor frequency response of the buzzer at low frequencies.

The present model provides a buzzer structure with a built-in low-frequency booster circuit, which includes: a main housing with: a bottom plate with a sound hole at the center; and a main housing wall, which is connected by the bottom plate The periphery extends upwards, and the inner side of the main housing wall is formed with a first support flange and a second support flange; a piezoelectric sound sheet is arranged on a first support flange and corresponds to the sound hole And a drive circuit board, which is arranged on the second support flange and is electrically connected to the piezoelectric sound sheet, and the drive circuit board is provided with a low-frequency booster circuit, which has: a first charge pump (charge pump) whose input terminal is connected in series with a linear regulator (LDO, low dropout regulator), and the linear regulator is used to receive a first voltage; a second charge pump whose input terminal is used to receive a second voltage; and A 2 times boost unit, the input terminal of which is used to receive a third voltage; wherein the first charge pump, the second charge pump, and the 2 times boost unit have a common output terminal.

With the implementation of this new model, at least the following improved effects can be achieved: 1. It can make the buzzer have a better frequency response at low frequencies. 2. With multiple sets of boost circuits, a hierarchical low-frequency frequency response can be generated.

In order to enable anyone who is familiar with the relevant skills to understand the technical content of the new model and implement it accordingly, and according to the content disclosed in this specification, the scope of patent application and the drawings, anyone who is familiar with the relevant skills can easily understand the purpose and advantages of the new model. Therefore, the detailed features and advantages of the present invention will be described in detail in the embodiments.

As shown in FIGS. 1 to 4, this embodiment is a buzzer structure 100 with a built-in low-frequency booster circuit, which includes: a main housing 10; a piezoelectric sound sheet 20; and a driving circuit board 30.

The main housing 10 has: a bottom plate 110; and a main housing wall 120. The bottom plate 110 has a sound hole 111 in the center; and a main shell wall 120 formed by extending upward from the periphery of the bottom plate 110, and a first supporting flange 121 is formed on the inner side of the main shell wall 120 And a second supporting flange 122.

The bottom plate 110 and the main housing wall 120 form a sound cavity structure 130. The end of the wall of the main housing 10 can be further combined with a cover plate 140, so that a complete buzzer housing structure 100a can be formed.

The piezoelectric sound sheet 20 may be a ceramic piezoelectric sound sheet 20. The piezoelectric sound sheet 20 is vibrably arranged on a first supporting flange 121 and cooperates with the sound cavity structure 130, and the piezoelectric sound sheet 20 is arranged at a position corresponding to the sound hole 111. When the piezoelectric sound piece 20 is added with an audio signal, it will expand and contract due to mechanical deformation due to the piezoelectric effect, causing the piezoelectric sound piece 20 to vibrate and make a sound. At this time, it can cooperate with the sound cavity structure 130. The buzzer structure 100 generates a buzzing sound.

The driving circuit board 30 is arranged on the second supporting flange 122 and is electrically connected to the piezoelectric sound sheet 20; the driving circuit board 30 is mainly used to generate audio signals and amplify the audio signals to sufficient power, and then input to the voltage The electronic sound film 20 effectively drives the piezoelectric sound film 20 to vibrate.

As shown in FIG. 5, the above-mentioned audio signal, in this embodiment, is mainly generated by the low-frequency booster circuit 30a on the driving circuit board 30, and the low-frequency booster circuit 30a has: a first charge pump 310; Two charge pumps 320; and a double boost unit 330.

The input terminal of the first charge pump 310 is connected in series with a linear regulator 311, and the linear regulator 311 is used to receive a first voltage V1, and the first voltage V1 can be 1 to 3.3 volts.

The input terminal of the second charge pump 320 is used to receive a second voltage V2, and the second voltage V2 can be 2.2 to 3.3 volts.

The double boost unit 330 has an input terminal for receiving a third voltage V3, and the third voltage V2 can be 3 to 18 volts, and the above-mentioned first charge pump 310, second charge pump 320, and 2 times The boosting unit 330 has a common output terminal O/P.

With the low-frequency booster circuit 30a, a better performance in the low-frequency sound range can be achieved, so as to have a better effect in certain application fields. In addition, with the above-mentioned first charge pump 310, second charge pump 320, and double boost unit 330, the buzzer can generate a hierarchical low-frequency frequency response at the low-frequency part.

However, the above-mentioned embodiments are used to illustrate the characteristics of the new model, and their purpose is to enable those familiar with the technology to understand the content of the new model and implement it accordingly, rather than limiting the scope of the patent of the new model. The equivalent modification or modification completed by the spirit of the disclosure should still be included in the scope of patent application described below.

100: Buzzer structure with built-in low-frequency booster circuit 100a: buzzer shell structure 10: Main shell 110: bottom plate 111: sound hole 120: main shell wall 121: first support flange 122: second support flange 130: Sound cavity structure 140: cover 20: Piezo film 30: drive circuit board 30a: low frequency boost circuit 310: The first charge pump 311: Linear Regulator 320: second charge pump 330: 2 times boost unit V1: first voltage V2: second voltage V3: third voltage O/P: output terminal

[Figure 1] is an exploded embodiment diagram of a buzzer structure with a built-in low-frequency booster circuit; [Figure 2] is a front view of an embodiment of the front combination of a buzzer with a built-in low-frequency booster circuit; [Figure 3] is a diagram of an embodiment of the back side of a buzzer structure with a built-in low-frequency booster circuit; [Fig. 4] is a sectional view of the embodiment of Fig. 3; and [Figure 5] is a block diagram of an embodiment of a low-frequency boost circuit circuit.

100: Buzzer structure with built-in low-frequency booster circuit

10: Main shell

110: bottom plate

111: sound hole

120: main shell wall

121: first support flange

122: second support flange

130: Sound cavity structure

20: Piezo film

30: drive circuit board

30a: low frequency boost circuit

310: The first charge pump

311: Linear Regulator

320: second charge pump

330: 2 times boost unit

V1: first voltage

V2: second voltage

V3: third voltage

O/P: output terminal

Claims (6)

A buzzer structure with a built-in low-frequency booster circuit, which includes: A main housing, which has: A bottom plate with a sound hole in the center; and A main casing wall formed by extending upward from the periphery of the bottom plate, and the inner side of the main casing wall is formed with a first supporting flange and a second supporting flange; A piezoelectric sound piece arranged on the first supporting flange and corresponding to the position of the sound hole; and A drive circuit board is arranged on the second supporting flange and is electrically connected to the piezoelectric sound sheet, and the drive circuit board is provided with a low-frequency booster circuit, which has: A first charge pump, the input terminal of which is connected in series with a linear regulator, and the linear regulator is used to receive a first voltage; A second charge pump, the input terminal of which is used to receive a second voltage; and A 2 times boost unit, the input terminal of which is used to receive a third voltage; The first charge pump, the second charge pump, and the double boost unit have a common output terminal. The buzzer structure according to claim 1, wherein the end of the main casing wall is further combined with a cover plate. The buzzer structure according to claim 1, wherein the piezoelectric sound piece is a ceramic piezoelectric sound piece. The buzzer structure according to claim 1, wherein the first voltage is 1 to 3.3 volts. The buzzer structure according to claim 1, wherein the second voltage is 2.2 to 3.3 volts. The buzzer structure according to claim 1, wherein the third voltage is 3 to 18 volts.

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