CN215647198U

CN215647198U - External Bluetooth module

Info

Publication number: CN215647198U
Application number: CN202121673212.8U
Authority: CN
Inventors: 周黎; 吴爽; 伦浩; 袁月薇; 王伦
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2022-01-25
Anticipated expiration: 2031-07-22

Abstract

The utility model discloses an external Bluetooth module, which comprises an audio input joint, a microprocessor and a Bluetooth module, wherein the audio input joint is used for being connected with an audio output joint of host equipment; the microprocessor is used for carrying out A/D conversion on the audio analog signal input by the audio input joint to generate an audio digital signal; the Bluetooth module is used for transmitting the audio digital signal to audio playing equipment. The external Bluetooth module provided by the utility model is inserted into the audio output connector of the host equipment, so that the audio analog signal output by the audio output connector of the host equipment can be converted into an audio digital signal by the external Bluetooth module and then sent to the audio playing equipment supporting Bluetooth connection through the Bluetooth module, and the application range of the host equipment without Bluetooth function is greatly expanded.

Description

External Bluetooth module

Technical Field

The utility model relates to the technical field of small electronic devices, in particular to an external Bluetooth module.

Background

At present, more and more audio playback devices support bluetooth connection, but some host computer devices do not have bluetooth connection function, and the host computer devices that do not have bluetooth connection function can not be connected with the audio playback devices that need bluetooth connection for use, and the use of the host computer devices that do not have bluetooth connection function is by very big restriction.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides an external Bluetooth module to solve the technical problems in the background technology.

An external Bluetooth module comprises an audio input connector, a microprocessor and a Bluetooth module, wherein the audio input connector is used for being connected with an audio output connector of host equipment;

the microprocessor is used for carrying out A/D conversion on the audio analog signal input by the audio input joint to generate an audio digital signal;

the Bluetooth module is used for transmitting the audio digital signal to audio playing equipment.

Further, still include power supply circuit, power supply circuit includes battery and boost circuit, boost circuit with microprocessor is connected.

Further, the battery is a button battery;

the booster circuit comprises a booster chip and a peripheral circuit, and the type of the booster chip is PW.

Further, a key switch is connected in series between the battery and the booster circuit.

The Bluetooth module is arranged on the shell, and the microprocessor, the Bluetooth module, the booster circuit and the key switch are integrated on a PCB (printed circuit board) which is arranged in the shell;

the battery is arranged in an installation cavity formed in the shell;

the key switch is movably penetrated out of the shell;

the audio input joint is fixedly connected to the shell.

Further, the model of the microprocessor is STC89C 52.

Further, the model of the Bluetooth module is BC 04-B.

Further, the audio input connector is one of a USB Type C connector, a Lightning connector, a 3.5mm earphone connector or a Micro USB connector.

The utility model has the beneficial effects that:

the external Bluetooth module provided by the utility model is inserted into the audio output connector of the host equipment, so that the audio analog signal output by the audio output connector of the host equipment can be converted into an audio digital signal by the external Bluetooth module and then sent to the audio playing equipment supporting Bluetooth connection through the Bluetooth module, and the application range of the host equipment without Bluetooth function is greatly expanded.

Drawings

In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings that are needed in the detailed description of the utility model or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is an electrical block diagram of an external bluetooth module according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an external bluetooth module according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the utility model pertains.

As shown in fig. 1-2, the external bluetooth module of the present invention includes an audio input connector 1 for connecting with an audio output connector of a host device, a microprocessor connected with the audio input connector 1, and a bluetooth module connected with the microprocessor through a serial port. The microprocessor is used for carrying out A/D conversion on the audio analog signal input by the audio input joint 1 to generate an audio digital signal; the Bluetooth module is used for transmitting the audio digital signal to the audio playing equipment.

In this embodiment, the audio input connector 1 is one of a USB Type C connector, a Lightning connector, a 3.5mm earphone connector or a Micro USB connector. When the user selects the external Bluetooth module, the corresponding audio input connector 1 is selected according to the type of the audio output connector of the host equipment to be connected. The model of the microprocessor is STC89C52, and the model of the Bluetooth module is BC 04-B.

The external Bluetooth module also comprises a power circuit, the power circuit comprises a battery 3 and a booster circuit, and the booster circuit is connected with the microprocessor. Battery 3 can adopt lithium cell, dry battery or button cell etc. for reducing external bluetooth module's volume, in this embodiment, battery 3 adopts button cell. The booster circuit comprises a booster chip and a peripheral circuit, wherein the type of the booster chip is PW5100, and the booster chip is used for boosting the 3V voltage output of the button battery to 5V output to supply power to the microprocessor.

A key switch 4 is connected in series between the battery 3 and the booster circuit, and when the booster circuit is not used, the key switch 4 is switched off to stop power supply, so that the electric energy loss of the battery 3 is reduced.

In this embodiment, the external bluetooth module further includes a housing 2. Microprocessor, bluetooth module, boost circuit and key switch 4 all integrate on the PCB board, and the PCB board is installed in casing 2. The battery 3 is arranged in an installation cavity formed in the shell 2, and the key switch 4 is movably penetrated out from the shell 2, so that a user can conveniently perform switch operation. The audio input connector 1 is fixedly connected to the housing 2.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. The utility model provides an external bluetooth module which characterized in that: the Bluetooth device comprises an audio input joint (1) connected with an audio output joint of host equipment, a microprocessor connected with the audio input joint (1), and a Bluetooth module connected with the microprocessor through a serial port;

the microprocessor is used for carrying out A/D conversion on the audio analog signal input by the audio input joint (1) to generate an audio digital signal;

2. The external bluetooth module of claim 1, wherein: still include power supply circuit, power supply circuit includes battery (3) and boost circuit, boost circuit with microprocessor is connected.

3. The external bluetooth module of claim 2, wherein: the battery (3) is a button battery;

the booster circuit comprises a booster chip and a peripheral circuit, wherein the model of the booster chip is PW 5100.

4. The external bluetooth module of claim 2, wherein: and a key switch (4) is connected in series between the battery (3) and the booster circuit.

5. The external bluetooth module of claim 2, wherein: the Bluetooth headset further comprises a shell (2), wherein the microprocessor, the Bluetooth module, the booster circuit and the key switch (4) are integrated on a PCB (printed circuit board), and the PCB is installed in the shell (2);

the battery (3) is arranged in an installation cavity formed in the shell (2);

the key switch (4) is movably penetrated out of the shell (2);

the audio input joint (1) is fixedly connected to the shell (2).

6. The external bluetooth module of claim 1, wherein: the microprocessor is model STC89C 52.

7. The external bluetooth module of claim 1, wherein: the model of the Bluetooth module is BC 04-B.

8. The external bluetooth module of claim 1, wherein: the audio input connector (1) is one of a USB Type C connector, a Lightning connector, a 3.5mm earphone connector or a Micro USB connector.