CN210431441U

CN210431441U - Public broadcasting player

Info

Publication number: CN210431441U
Application number: CN201921891166.1U
Authority: CN
Inventors: 成俊
Original assignee: Guangzhou Quanyu Technology Co Ltd
Current assignee: Guangzhou Quanyu Technology Co Ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-04-28
Anticipated expiration: 2029-11-05

Abstract

The utility model provides a public address player, including audio amplifier, broadcast audio matrix, a plurality of speaker and overcurrent protection unit, the broadcast audio matrix includes matrix the control unit, and matrix the control unit includes at least one signal input part and a plurality of signal output part, and signal input part is connected with audio amplifier passing signal line, and every signal output part passes signal line with the speaker of difference alone and is connected, and overcurrent protection unit sets up between matrix the control unit and speaker. When a short circuit occurs in a certain loudspeaker line of the public broadcasting player, the short-circuited line can be independently cut off through the overcurrent protection unit, so that the large-current backflow impact generated by the short circuit can not be transmitted to the matrix control unit, the normal operation of other residual loudspeakers can not be influenced, and the purpose that the whole public broadcasting system can not be temporarily paralyzed when a certain loudspeaker line generates the short circuit is achieved.

Description

Public broadcasting player

Technical Field

The utility model relates to an audio information equipment technical field especially relates to a public address player.

Background

The public broadcasting system is a broadcasting system installed in a public office, a school, a subway station, an airport, etc., and has a speaker for broadcasting at each location spaced apart from a site, and controls the site speaker through a matrix using a control device installed in a broadcasting control room, and provides an audio signal to the site speaker to broadcast an event guide broadcast. In the conventional public broadcasting system, when a line of a certain speaker is suddenly short-circuited due to irresistible reasons such as fire, the short-circuit current may affect the whole public line, possibly affect other remaining speakers and cannot play audio, so that the whole public broadcasting system is temporarily paralyzed and cannot timely convey event guidance.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a public address player for solving the above problems, in which even if a short circuit occurs in a certain speaker, the normal operation of the remaining speakers is not affected.

The utility model provides a technical scheme that its technical problem adopted is:

a public broadcasting player comprises an audio amplifier, a broadcasting audio matrix, a plurality of loudspeakers and an overcurrent protection unit, wherein the broadcasting audio matrix comprises a matrix control unit, the matrix control unit comprises at least one signal input end and a plurality of signal output ends, the signal input end is connected with the audio amplifier through a signal line, each signal output end is separately connected with different loudspeakers through a signal line and used for distributing signals output by the audio amplifier to the loudspeakers, and the overcurrent protection unit is arranged between the matrix control unit and the loudspeakers and used for preventing short-circuited large current from flowing back to the matrix control unit.

Further, the overcurrent protection unit comprises a plurality of circuit breakers, and one circuit breaker is arranged at the front end of each signal output end of the matrix control unit.

Further, the overcurrent protection unit further comprises a signal indicator light, and a signal indicator light is arranged at the front end of each circuit breaker.

Further, the overcurrent protection unit is embedded in the broadcast audio matrix and is arranged at the front end of the matrix control unit.

Further, the overcurrent protection unit is arranged in a box body and is independently arranged outside the broadcast audio matrix.

The utility model has the advantages that:

through the technical scheme, the utility model discloses a public address player is connected speaker and matrix control unit alone to set up the overcurrent protection unit on the circuit of independent connection, take place the short circuit in certain speaker circuit, all can cut off the circuit of this short circuit alone through the overcurrent protection unit, thereby can not impact the heavy current backward flow that produces by the short circuit and transmit matrix control unit, can not influence the normal operating of other remaining speakers, reach certain speaker circuit and produce the short circuit and also can not lead to whole public address system paralysed purpose temporarily.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of an implementation of the public address player of the present invention;

fig. 2 is a schematic diagram of another implementation structure of the public address player of the present invention.

Reference numerals: 1. an audio amplifier; 2. a broadcast audio matrix; 21. a matrix control unit; 3. a speaker; 4. an overcurrent protection unit; 41. a circuit breaker; 42. a signal indicator light; 5. and (5) a box body.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

As shown in fig. 1-2, a public address player comprises an audio amplifier 1, a broadcast audio matrix 2, a plurality of speakers 3 and an overcurrent protection unit 4, wherein the broadcast audio matrix 2 comprises a matrix control unit 21, the matrix control unit 21 comprises at least one signal input terminal and a plurality of signal output terminals, the signal input terminal is connected with the audio amplifier 1 through a signal line, each signal output terminal is individually connected with different speakers 3 through a signal line for distributing signals output by the audio amplifier 1 to the speakers 3, and the overcurrent protection unit 4 is arranged between the matrix control unit 21 and the speakers 3 for preventing large current of short circuit from flowing back to the matrix control unit 21.

One or more speakers 3 are installed in different areas of a venue site, connected to a broadcast audio matrix 2 of a broadcast control room through independent signal lines, and a matrix control unit 21 of the broadcast audio matrix 2 distributes a signal output from the audio amplifier 1 to each speaker 3. The signal lines of each speaker 3 are independent from each other outside the matrix control unit 21, when a short circuit occurs in a line of a certain speaker 3, the line is cut off by the overcurrent protection unit 4, the matrix control unit 21 is not connected with the speaker 3, the matrix control unit 21 does not supply power to the speaker 3, the short-circuit current in the same line of the speaker 3 does not flow back to the matrix control unit 21, and the other remaining speakers 3 can still be used normally.

Specifically, the overcurrent protection unit 4 has a plurality of breakers 41, one breaker 41 is provided at the front end of each signal output terminal of the matrix control unit 21, and when a short circuit occurs in a line of a certain speaker 3, a large short-circuit current is generated, and the short-circuit current causes the breaker 41 to be cut off, so that only the line in which the short circuit occurs is cut off individually. A signal indicator lamp 42 is provided at the front end of each breaker 41, and the signal indicator lamp 42 is turned on when a signal is output from the speaker 3. If the matrix control unit 21 allocates the output of the speaker 3 line and the signal indicator lamp 42 is not turned on, it can be determined that the speaker 3 line is cut off, and the short-circuited line can be repaired in time.

Fig. 1 is a specific embodiment of the public address player, and the overcurrent protection unit 4 is embedded in the broadcast audio matrix 2 and disposed at the front end of the matrix control unit 21. This design can directly provide both the overcurrent protection unit 4 and the matrix control unit 21 within the broadcast audio matrix 2 at the time of producing the broadcast audio matrix 2, saving space and simplifying the process of arranging the broadcast control room.

Fig. 2 shows another specific embodiment of the public address player, the overcurrent protection unit 4 is arranged in a box 5, independently arranged outside the broadcast audio matrix 2, the box 5 has a plurality of input ports and a plurality of output ports, and the circuit breaker 41 and the signal lines are arranged between the input ports and the output ports. When the overcurrent protection unit 4 is used, a signal line output by the broadcast audio matrix 2 is connected to the input port, and then the output port and the loudspeaker 3 are connected through another signal line. This design makes it possible to arrange the overcurrent protection unit 4 in and in the arranged broadcasting system.

The above embodiments of the present invention are not right the utility model discloses the limited protection scope, the utility model discloses an embodiment is not limited to this, all kinds of basis according to the above-mentioned of the utility model discloses an under the above-mentioned basic technical thought prerequisite of the utility model, right according to ordinary technical knowledge and the conventional means in this field the modification, replacement or the change of other multiple forms that above-mentioned structure made all should fall within the protection scope of the utility model.

Claims

1. A public address player characterized by: the broadcasting audio matrix comprises a matrix control unit, the matrix control unit comprises at least one signal input end and a plurality of signal output ends, the signal input ends are connected with the audio amplifier through signal lines, each signal output end is separately connected with different speakers through signal lines and used for distributing signals output by the audio amplifier to the speakers, and the overcurrent protection unit is arranged between the matrix control unit and the speakers and used for isolating large current of short circuit from flowing back to the matrix control unit.

2. A public address player according to claim 1, wherein: the overcurrent protection unit comprises a plurality of circuit breakers, and the front end of each signal output end of the matrix control unit is provided with one circuit breaker.

3. A public address player according to claim 2, wherein: the overcurrent protection unit further comprises signal indicating lamps, and one signal indicating lamp is arranged at the front end of each circuit breaker.

4. A public address player according to claim 1, wherein: the overcurrent protection unit is embedded in the broadcast audio matrix and is arranged at the front end of the matrix control unit.

5. A public address player according to claim 1, wherein: the overcurrent protection unit is arranged in a box body and is independently arranged outside the broadcast audio matrix.