CN201134803Y - bluetooth wireless microphone - Google Patents

Abstract

The utility model discloses a Bluetooth wireless microphone, which comprises a transmitter and a receiver connected in a wireless mode, wherein power supply components are respectively arranged in the transmitter and the receiver; the transmitter comprises an audio input module, a first audio processing module and a first Bluetooth communication module which are electrically connected in sequence; the receiver comprises a second Bluetooth communication module, a second audio processing module and an audio output module which are sequentially and electrically connected, wherein the audio output module can be connected with external output equipment. The utility model adopts the Bluetooth communication protocol to transmit signals, can be used by a plurality of people on the same large occasion, does not generate any interference and does not generate the phenomenon of sound interruption in use; the operation mode is simple, the emitter and the receiver can be automatically paired, and the effect of no noise can be realized without debugging frequency; the audio data output is stable, the circuit is added with the function of eliminating noise and echo, and the beautiful tone quality and the real tone color can be realized; the emitter is provided with a volume adjusting key, and the volume can be adjusted without a loudspeaker.

Description

bluetooth wireless microphone

technical field

The utility model relates to a wireless microphone.

Background technique

At present, most of the common wireless microphones are FM (frequency modulation) wireless microphones with a frequency range of 200-700 megabytes. This FM wireless microphone has the following disadvantages: (1) The frequency band used is unstable, and several people use it at the same time in the same occasion. Severe mutual interference is prone to occur when it is used, and normal use cannot be guaranteed; (2) It is large in size and must be equipped with a large receiver and transmitter, which is inconvenient to carry around. Moreover, when the transmitter is not used on the waist, if you accidentally fall down, it will often cause waist injury; (3) there are almost no volume adjustment keys, and when the volume needs to be adjusted, it is achieved through a loudspeaker; ( 4) The frequency of the transmitter and receiver must be adjusted before installation and use. If the adjustment is inaccurate, noise will occur; however, this frequency is difficult to adjust, so there will inevitably be some noise; (5) The manufacturing cost is relatively high; (6) )Single function.

With the development of wireless transmission technology, wireless Bluetooth transmission technology is gradually replacing traditional wireless transmission technology, and gradually widely used in various occasions and devices. Wireless Bluetooth transmission technology has the ability to transmit voice, data and signals at the same time without interference It has also become a very important transmission device for modern users to transmit voice or data. There are many Bluetooth headsets on the market, but Bluetooth microphones have not yet appeared.

Utility model content

The purpose of the utility model is to overcome the shortcomings of the traditional wireless microphone and provide a wireless microphone transmitted through bluetooth.

In order to achieve the above object, the utility model adopts the following technical solutions: design a bluetooth wireless microphone, including a transmitter and a receiver connected wirelessly; the transmitter and the receiver are respectively provided with power components; wherein, the The transmitter includes an audio input module, a first audio processing module and a first Bluetooth communication module that are electrically connected in sequence; the receiver includes a second Bluetooth communication module that is electrically connected in sequence, a second audio processing module and an external output device that can be connected audio output module.

Further, the first bluetooth communication module includes a baseband processing unit and a radio frequency processing unit, which converts the digital audio signal from the first audio processing module into a bluetooth signal, and then sends the bluetooth signal to the receiver through the first built-in bluetooth antenna device; the second bluetooth communication module includes a baseband processing unit and a radio frequency processing unit, which receives the bluetooth signal from the transmitter through the second built-in bluetooth antenna, then converts the bluetooth signal into a digital audio signal, and transmits it to the second audio processing module.

Preferably, the transmitter is also provided with a volume control device.

The transmitter is provided with a first pairing key, and the receiver is provided with a second pairing key.

The power supply assembly includes a charging circuit, a power management circuit and a rechargeable battery; the rechargeable battery is preferably a lithium battery.

The transmitter is provided with a fixing clip.

One end of the transmitter is provided with an audio input port, and the other end is provided with a switch device and a charging port; one end of the receiver is provided with an audio plug, and the other end is provided with a switch device and a charging port.

The transmitter and the receiver are respectively provided with LED indicator lights.

An audio amplification circuit may also be connected between the second audio processing module and the audio output module.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

(1) The Bluetooth communication protocol is used for signal transmission. Since Bluetooth uses a unique 2.4G frequency band, it can be used by multiple people at the same time on the same large occasion without any interference or interruption of use;

(2) After the switch device is turned on, the utility model can be plugged and played after waiting for 3 seconds (pairing), the operation mode is simple, the transmitter and the receiver can be automatically paired, and no noise can be realized without debugging Effect;

(3) The output of audio data is stable, and the function of eliminating noise and echo is added to the circuit, which can realize beautiful sound quality and real timbre;

(4) The length of the transmitter and receiver in the utility model is only about 57mm, which is small in size, full of functions, and easy to carry. In any environment, the receiver only needs to be inserted into the audio interface of the loudspeaker or other external devices The audio interface is ready to use immediately. Because it is easy to use and carry, it can be used in a wide range, for example, when teachers at all levels of schools and cram schools give lectures, when schools and various groups have outdoor activities, when travel agencies lead groups, when various promotional activities, and when various religious gatherings , as well as in large hospitals, parking lots, factories, etc.;

(5) The transmitter of the utility model is provided with a volume adjustment key, which need not be realized by a loudspeaker when adjusting the volume;

(6) The utility model is compatible with all devices using the Bluetooth protocol, such as notebook computers, video cameras, PDAs, MP3/MP4, karaoke singing systems, satellite navigators and loudspeakers, etc.;

(7) Low manufacturing cost;

(8) Low power consumption.

Description of drawings

Fig. 1 is the perspective view of the transmitter of the utility model bluetooth wireless microphone;

Fig. 2 is the perspective view of the receiver of the utility model bluetooth wireless microphone;

Fig. 3 is the principle block diagram of the transmitter of the utility model bluetooth wireless microphone;

Fig. 4 is a schematic block diagram of the receiver of the Bluetooth wireless microphone of the present invention.

The utility model is described in further detail below in conjunction with the accompanying drawings and embodiments.

Detailed ways

Fig. 1 is a perspective view of the transmitter of the Bluetooth wireless microphone of the present invention. The transmitter 1 is provided with a fixing clip 2, which can clamp and fix the transmitter 1 on the user's chest. One end of the transmitter is provided with an audio input port 3 which can be opposite to the sound source, and the other end is provided with a switch device and a charging port. In addition, the transmitter 1 is also provided with a volume control button 4, and the volume control button 4 also serves as a first pairing button for pairing with the receiver. In order to facilitate the user to understand the current working state of the transmitter, the transmitter 1 is also provided with an LED indicator light 5 .

Fig. 2 is a perspective view of the receiver of the Bluetooth wireless microphone of the present invention. One end of the receiver 6 is provided with a 2.5mm/3.5mm universal audio plug 7 for connecting to an external output device 10 such as a loudspeaker, and the other end of the receiver 6 is provided with a switch device and a charging port. The receiver 6 is provided with a second pairing key 8 paired with the transmitter 1 . In order to facilitate the user to understand the current working state of the receiver 6 , the receiver 6 is also provided with an LED indicator 9 .

Fig. 3 is a functional block diagram of the transmitter 1 of the Bluetooth wireless microphone of the present invention. Wherein, the interior of the transmitter 1 includes an audio input module 11, a first audio processing module 12 and a first Bluetooth communication module 13 electrically connected in sequence; in addition, a power supply assembly 14 is also provided in the transmitter, including a charging circuit 141, a power management The circuit 142 and the rechargeable lithium battery 143 etc. are used to provide the required electric energy for each module, and the charging port can be used to connect with the charger to charge the lithium battery 143. Wherein, the audio input module 11 utilizes the pickup head 111 to receive an external sound signal, and outputs an analog audio signal to the first audio processing module 12; the first audio processing module 12 includes an audio encoding/decoding circuit for inputting the audio input module 11 The analog audio signal is converted into a corresponding digital audio signal; the first bluetooth communication module 13 includes a baseband processing unit 131 and a radio frequency processing unit 132, which is used to convert the digital audio signal into a bluetooth signal, and then pass the first built-in bluetooth antenna 133 to the bluetooth The signal is sent to the receiver 6 .

Fig. 4 is a schematic block diagram of the receiver 6 of the Bluetooth wireless microphone of the present invention. The receiver 6 includes a second bluetooth communication module 61, a second audio processing module 62 and an audio output module 63 electrically connected in sequence; in addition, the receiver 6 is also provided with a power supply assembly 64, including a charging circuit 641, a power management circuit 642 and rechargeable lithium battery 643 etc., so that each module provides the electric energy required for work, and can utilize charging port to be connected with charger, to charge lithium battery 643. The second bluetooth communication module 61 includes a radio frequency processing unit 611 and a baseband processing unit 612, which receives the bluetooth signal from the transmitter 1 through the second built-in bluetooth antenna 613, then converts the bluetooth signal into a digital audio signal, and sends it to The second audio processing module 62 ; the second audio processing module 62 converts the digital audio signal into an analog audio signal, and then sends it to the audio output module 63 . The audio output module 63 is connected to an external device such as a loudspeaker through the universal audio connector 7 to amplify and output the audio signal. When connecting with an external device without signal amplification function, an audio amplifying circuit can be connected between the second audio processing module 62 and the audio output module 63 so as to amplify the audio signal before outputting it.

The utility model adopts the bluetooth communication protocol for signal transmission, and can be used by multiple people at the same time on the same large occasion without any interference or interruption of use; the operation method is simple, and the connection between the transmitter and the receiver It can be paired automatically, and the effect of no noise can be achieved without adjusting the frequency; the audio data output is stable, and the function of eliminating noise and echo is added to the circuit, which can realize beautiful sound quality and real timbre; the volume adjustment key is set on the transmitter, The volume can be adjusted without using a loudspeaker.

The above are only preferred embodiments of the present utility model. It should be pointed out that those skilled in the art can make some modifications and improvements without departing from the inventive concept of the present utility model, and these changes and changes should be regarded as belonging to the protection scope of the present utility model.

Claims (10)

1, a kind of Bluetooth wireless microphone comprises

Reflector and receiver by the wireless mode connection;

Be respectively equipped with power supply module in described reflector and the receiver;

It is characterized in that:

Described reflector comprises audio frequency input module, first audio processing modules and first bluetooth communication module that is electrically connected successively;

Described receiver comprises second bluetooth communication module, second audio processing modules that is electrically connected successively and can be connected the audio frequency output module of output peripheral equipment.

2, Bluetooth wireless microphone according to claim 1 is characterized in that:

Described first bluetooth communication module comprises baseband processing unit and RF processing unit, and it changes into Bluetooth signal with the digital audio and video signals that first audio processing modules transmits, and by the first embedded with bluetooth antenna Bluetooth signal is sent to receiver then;

Described second bluetooth communication module comprises baseband processing unit and RF processing unit, and it receives the Bluetooth signal that comes from reflector by the second embedded with bluetooth antenna, then Bluetooth signal is changed into digital audio and video signals, and sends second audio processing modules to.

3, Bluetooth wireless microphone according to claim 1 is characterized in that:

Also be provided with sound volume control device on the described reflector.

4, Bluetooth wireless microphone according to claim 1 is characterized in that:

Described reflector is provided with first pairing key;

Described receiver is provided with second pairing key.

5, Bluetooth wireless microphone according to claim 1 is characterized in that:

Described power supply module comprises charging circuit, electric power management circuit and rechargeable battery.

6, Bluetooth wireless microphone according to claim 5 is characterized in that:

Described rechargeable battery is a lithium battery.

7, Bluetooth wireless microphone according to claim 1 is characterized in that:

Described reflector is provided with geometrical clamp.

8, Bluetooth wireless microphone according to claim 1 is characterized in that:

One end of described reflector is provided with audio input port, and the other end is provided with switching device and charge port;

One end of described receiver is provided with the audio interface plug, and the other end is provided with switching device and charge port.

9, Bluetooth wireless microphone according to claim 1 is characterized in that:

Be respectively equipped with LED light on described reflector and the receiver.

10, Bluetooth wireless microphone according to claim 1 is characterized in that:

Also be connected with audio amplifier circuit between described second audio processing modules and the audio frequency output module.

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