Control circuit of open-type sound box and open-type sound box using same

Abstract

The utility model relates to the technical field of open-type sound boxes, in particular to a control circuit of an open-type sound box and the open-type sound box using the control circuit. The control circuit of the open type sound box comprises a detection sub-circuit, a control sub-circuit and a switching sub-circuit, the input end of the detection sub-circuit is electrically connected with conventional sound source equipment and emergency sound source equipment, the input end of the control sub-circuit is electrically connected with the output end of the detection sub-circuit, and the output end of the control sub-circuit is electrically connected with the input end of the switching sub-circuit; the output end of the switching sub-circuit is electrically connected with a loudspeaker, and the switching sub-circuit switches an emergency sound source signal according to the switching instruction, so that the loudspeaker plays the emergency sound source signal; according to the utility model, a conventional sound source device and an emergency sound source device can be externally connected, and through a built-in detection switching circuit rule, the problem of sound channel disorder of multiple sound source devices is solved, and the functions of automatic detection and switching playing of the emergency sound source device are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of open-type sound boxes, in particular to a control circuit of an open-type sound box and an open-type sound box using the control circuit. Background Art

[0002] A speaker is a device that can convert audio signals into sound. In layman's terms, it means that the speaker main box or subwoofer box has a built-in power amplifier, which amplifies the audio signal and then plays it back through the speaker itself, making the sound louder.

[0003] The speaker is the terminal of the entire sound system. Its function is to convert audio electrical energy into corresponding sound energy and radiate it into space. It is an extremely important component of the sound system, responsible for converting electrical signals into sound signals for direct human hearing.

[0004] Speakers are divided into three types according to their structure: open, semi-closed and closed. Open speakers are generally used in places with large areas such as dance halls, karaoke bars, theaters, halls, gymnasiums and multimedia classrooms.

[0005] In the past, open speakers could only play conventional sound source signals of conventional sound source devices and could not be connected to other devices. Their functions were relatively simple. After continuous improvement, existing open speakers can be connected to multiple devices. However, there are still multiple programs requesting to open different sound channels, which can easily lead to confusion. For example, when the usage area is large and an emergency event occurs and the people on site need to be informed, playing the emergency sound source signal through the open speaker is the most efficient method. However, the speaker of the speaker may play both the conventional sound source signal and the emergency sound source signal at the same time, affecting the hearing of the people on site. Utility Model Content

[0006] The purpose of the utility model is to propose a control circuit of an open sound box and an open sound box using the control circuit, which can be externally connected to a conventional sound source device and an emergency sound source device, solve the problem of chaotic sound channels when there are multiple sound source devices through built-in detection and switching circuit rules, and realize the function of automatically detecting and switching to play the emergency sound source device.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] A control circuit for an open sound box, comprising a detection subcircuit, a control subcircuit and a switching subcircuit;

[0009] The input end of the detection subcircuit is electrically connected to a conventional sound source device and an emergency sound source device respectively, the conventional sound source device is used to input a conventional sound source signal, the emergency sound source device is used to input an emergency sound source signal, the detection subcircuit is used to detect whether the emergency sound source device has an input emergency sound source signal, and input a detection instruction to the control subcircuit;

[0010] The input end of the control subcircuit is electrically connected to the output end of the detection subcircuit, the output end of the control subcircuit is electrically connected to the input end of the switching subcircuit, and the control subcircuit is used to cut off the normal sound source signal according to the detection instruction, and output the switching instruction of the emergency sound source signal to the switching subcircuit;

[0011] The output end of the switching subcircuit is electrically connected to a loudspeaker, and the switching subcircuit switches the emergency sound source signal according to the switching instruction so that the loudspeaker plays the emergency sound source signal.

[0012] Preferably, it further comprises an attenuation subcircuit, wherein the input end of the attenuation subcircuit is electrically connected to the detection subcircuit, and the output end of the attenuation subcircuit is electrically connected to the switching subcircuit;

[0013] The attenuation subcircuit is used for stably outputting a conventional sound source signal of a conventional sound source device.

[0014] Preferably, the detection subcircuit includes a resistor R3, a resistor R4, a resistor R8, a comparator U1, and a socket J1 for electrically connecting the first sound source device and the second sound source device;

[0015] The first end of the socket J1, the second end of the socket J1, one end of the resistor R3 and the positive input end of the comparator U1 are all electrically connected to the attenuation subcircuit;

[0016] The third end of the socket J1, the other end of the resistor R3 and one end of the resistor R8 are electrically connected, the other end of the resistor R8 and one end of the resistor R4 are both electrically connected to the negative input terminal of the comparator, the other end of the resistor R4 and the output end of the comparator are both electrically connected to the control subcircuit, and the other end of the resistor R4 is also connected to a 5V working voltage.

[0017] Preferably, the control subcircuit includes a resistor R5, a diode D1, a resistor R6, a polarity capacitor C1, a transistor Q1, a transistor Q2, a resistor R7 and a diode D2;

[0018] One end of the resistor R5 and the positive electrode of the diode D1 are electrically connected to the detection sub-circuit, the other end of the resistor R5, one end of the resistor R7 and the negative electrode of the diode D2 are connected to a 5V working voltage, the negative electrode of the diode D1 and one end of the resistor R6 are electrically connected to the positive electrode of the polarity capacitor C1, the negative electrode of the polarity capacitor C1 is grounded, the other end of the resistor R6 is electrically connected to the base of the transistor Q1, the collector of the transistor Q1 is electrically connected to the base of the transistor Q2 and the other end of the resistor R7, and the collector of the transistor Q2 is electrically connected to the positive electrode of the diode D2 and the switching sub-circuit.

[0019] Preferably, the switching subcircuit comprises a relay RL1 and a socket P1 for electrically connecting to a speaker;

[0020] Both ends of the coil of the relay RL1 are electrically connected to the control subcircuit, one of the normally closed contacts of the relay RL1 is electrically connected to the attenuation subcircuit, the other normally closed contact and one of the normally open contacts of the relay RL1 are electrically connected to the second end of the socket P1, the other normally open contact of the relay RL1 is electrically connected to the first end of the socket P1, the third end of the socket P1 is grounded, and the fourth end of the socket P1 is connected to a 5V working voltage.

[0021] Preferably, the attenuation subcircuit includes a resistor R1, a resistor R2 and a variable resistor RV1;

[0022] One end of the resistor R1 is electrically connected to the detection subcircuit, the other end of the resistor R1 is electrically connected to one end of the variable resistor RV1, and the other end of the variable resistor RV1 is electrically connected to one end of the resistor R2 and the switching subcircuit respectively.

[0023] An open sound box adopts the control circuit of the open sound box described above.

[0024] One of the above technical solutions has the following beneficial effects:

[0025] The conventional sound source signals and emergency sound source signals of conventional sound source devices and emergency sound source devices are accessed through the detection subcircuit. While the conventional sound source signals are played normally, the emergency sound source signals can be detected, and a detection instruction is input to the control subcircuit. The control subcircuit cuts off the conventional sound source signal according to the detection instruction, and outputs a sound source switching instruction of the emergency sound source signal to the switching subcircuit; so that the switching subcircuit can automatically switch the emergency sound source signal, solve the problem of confusion of sound channels when there are multiple sound source devices, and realize the function of giving priority to playing the emergency sound source device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1It is a schematic diagram of the principle of the control circuit of the open-type speaker of the utility model;

[0027] Figure 2 It is a structural schematic diagram of the control circuit of the open-type speaker of the utility model;

[0028] In the accompanying drawings: detection sub-circuit 1, control sub-circuit 2, switching sub-circuit 3, attenuation sub-circuit 4. DETAILED DESCRIPTION

[0029] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figure 1 As shown, a control circuit of an open-type speaker includes a detection subcircuit 1, a control subcircuit 2 and a switching subcircuit 3;

[0034] The input end of the detection subcircuit 1 is electrically connected to a conventional sound source device and an emergency sound source device, respectively. The conventional sound source device is used to input a conventional sound source signal, and the emergency sound source device is used to input an emergency sound source signal. The detection subcircuit 1 is used to detect whether the emergency sound source device has an input emergency sound source signal, and input a detection instruction to the control subcircuit 2;

[0035] The input end of the control subcircuit 2 is electrically connected to the output end of the detection subcircuit 1, and the output end of the control subcircuit 2 is electrically connected to the input end of the switching subcircuit 3. The control subcircuit 2 is used to cut off the conventional sound source signal according to the detection instruction, and output the switching instruction of the emergency sound source signal to the switching subcircuit 3;

[0036] The output end of the switching subcircuit 3 is electrically connected to a loudspeaker, and the switching subcircuit 3 switches the emergency sound source signal according to the switching instruction so that the loudspeaker plays the emergency sound source signal.

[0037] Specifically, the utility model accesses conventional sound source signals and emergency sound source signals of conventional sound source devices and emergency sound source devices through the detection subcircuit 1. While playing the conventional sound source signal normally, the emergency sound source signal can be detected, and the detection instruction is input to the control subcircuit 2. The control subcircuit 2 cuts off the conventional sound source signal according to the detection instruction, and outputs the sound source switching instruction of the emergency sound source signal to the switching subcircuit 3; so that the switching subcircuit 3 can automatically switch the emergency sound source signal, solve the problem of confusion of sound channels when there are multiple sound source devices, and realize the function of giving priority to playing the emergency sound source device.

[0038] It also includes an attenuation subcircuit 4, wherein an input end of the attenuation subcircuit 4 is electrically connected to the detection subcircuit 1, and an output end of the attenuation subcircuit 4 is electrically connected to the switching subcircuit 3;

[0039] The attenuation subcircuit 4 is used for stably outputting a conventional sound source signal of a conventional sound source device.

[0040] To further explain, the control circuit of the open speaker appropriately attenuates the conventional sound source signal through the attenuation subcircuit 4, thereby increasing the sound effect and improving the user experience.

[0041] like Figure 2 As shown, the detection subcircuit 1 includes a resistor R3, a resistor R4, a resistor R8, a comparator U1 and a socket J1 for electrically connecting a first sound source device and a second sound source device;

[0042] The first end of the socket J1, the second end of the socket J1, one end of the resistor R3 and the positive input end of the comparator U1 are all electrically connected to the attenuation sub-circuit 4;

[0043] The third end of the socket J1, the other end of the resistor R3 and one end of the resistor R8 are electrically connected, the other end of the resistor R8 and one end of the resistor R4 are both electrically connected to the negative input terminal of the comparator, the other end of the resistor R4 and the output end of the comparator are both electrically connected to the control subcircuit 2, and the other end of the resistor R4 is also connected to a 5V working voltage.

[0044] Further explanation, the circuit principle structure of the detection subcircuit 1 is: the amplification and rectification detection subcircuit 1 with a preset threshold is composed of resistors R4, R8 and comparator U1 to detect the emergency sound source signal. When the emergency sound source signal is detected, the comparator U1 is compared with the set threshold, and the comparator U1 is flipped to form a detection instruction to feedback to the control subcircuit 2. The above can reduce false triggering and reliably input the detection instruction.

[0045] like Figure 2 As shown, by detecting the broadcasted audio signal, the control subcircuit 2 includes a resistor R5, a diode D1, a resistor R6, a polarity capacitor C1, a transistor Q1, a transistor Q2, a resistor R7 and a diode D2;

[0046] One end of the resistor R5 and the positive electrode of the diode D1 are electrically connected to the detection sub-circuit 1, the other end of the resistor R5, one end of the resistor R7 and the negative electrode of the diode D2 are connected to a 5V working voltage, the negative electrode of the diode D1 and one end of the resistor R6 are electrically connected to the positive electrode of the polarity capacitor C1, the negative electrode of the polarity capacitor C1 is grounded, the other end of the resistor R6 is electrically connected to the base of the transistor Q1, the collector of the transistor Q1 is electrically connected to the base of the transistor Q2 and the other end of the resistor R7, and the collector of the transistor Q2 is electrically connected to the positive electrode of the diode D2 and the switching sub-circuit 3, respectively.

[0047] Specifically, when the detection subcircuit 1 does not detect the emergency sound source signal, the positive input of the comparator U1 is 0V, and the output of the comparator U1 is also 0V, so that the transistor Q1 is turned off and the transistor Q2 is turned on, and the conventional sound source signal of the conventional sound source device can be played normally;

[0048] When the detection subcircuit 1 detects an emergency sound source signal and it is greater than a preset threshold, the comparator U1 flips, causing the transistor Q1 to turn on and the transistor Q2 to turn off. The conventional sound source signal of the conventional sound source device is cut off, and the emergency sound source signal of the emergency sound source device is able to enter the switching subcircuit 3.

[0049] The switching subcircuit 3 includes a relay RL1 and a socket P1 for electrically connecting to a speaker;

[0050] Both ends of the coil of the relay RL1 are electrically connected to the control subcircuit 2, one of the normally closed contacts of the relay RL1 is electrically connected to the attenuation subcircuit 4, the other normally closed contact and one of the normally open contacts of the relay RL1 are electrically connected to the second end of the socket P1, the other normally open contact of the relay RL1 is electrically connected to the first end of the socket P1, the third end of the socket P1 is grounded, and the fourth end of the socket P1 is connected to a 5V working voltage.

[0051] To explain further, since the relay is an automatic switching device with an isolation function, its function can be used in the control circuit of the open speaker to control the "on" and "off" of the controlled conventional sound source signal.

[0052] The attenuation subcircuit 4 includes a resistor R1, a resistor R2 and a variable resistor RV1;

[0053] One end of the resistor R1 is electrically connected to the detection subcircuit 1 , the other end of the resistor R1 is electrically connected to one end of the variable resistor RV1 , and the other end of the variable resistor RV1 is electrically connected to one end of the resistor R2 and the switching subcircuit 3 , respectively.

[0054] To further explain, the size of the conventional sound source signal can be adjusted by the variable resistance value of the variable resistor RV1 to achieve different sound effects.

[0055] An open sound box adopts the control circuit of the open sound box described above.

[0056] The utility model provides an open sound box which can be applied to places with a large use area such as dance halls, karaoke bars, theaters, meeting halls, gymnasiums and multimedia classrooms.

[0057] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementations of the present invention without creative work, and these equivalent variations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A control circuit for an open speaker, characterized in that: It includes a detection subcircuit, a control subcircuit and a switching subcircuit; The input end of the detection subcircuit is electrically connected to a conventional sound source device and an emergency sound source device respectively, the conventional sound source device is used to input a conventional sound source signal, the emergency sound source device is used to input an emergency sound source signal, the detection subcircuit is used to detect whether the emergency sound source device has an input emergency sound source signal, and input a detection instruction to the control subcircuit; The input end of the control subcircuit is electrically connected to the output end of the detection subcircuit, the output end of the control subcircuit is electrically connected to the input end of the switching subcircuit, and the control subcircuit is used to cut off the normal sound source signal according to the detection instruction, and output the switching instruction of the emergency sound source signal to the switching subcircuit; The output end of the switching subcircuit is electrically connected to a loudspeaker, and the switching subcircuit switches the emergency sound source signal according to the switching instruction so that the loudspeaker plays the emergency sound source signal; It also includes an attenuation subcircuit, wherein an input end of the attenuation subcircuit is electrically connected to the detection subcircuit, and an output end of the attenuation subcircuit is electrically connected to the switching subcircuit; The attenuation subcircuit is used to stably output a conventional sound source signal of a conventional sound source device; The detection subcircuit includes a resistor R3, a resistor R4, a resistor R8, a comparator U1, and a socket J1 for electrically connecting the first sound source device and the second sound source device; The first end of the socket J1, the second end of the socket J1, one end of the resistor R3 and the positive input end of the comparator U1 are all electrically connected to the attenuation subcircuit; The third end of the socket J1, the other end of the resistor R3 and one end of the resistor R8 are electrically connected, the other end of the resistor R8 and one end of the resistor R4 are both electrically connected to the negative input terminal of the comparator, the other end of the resistor R4 and the output end of the comparator are both electrically connected to the control subcircuit, and the other end of the resistor R4 is also connected to a 5V working voltage.

2. The control circuit of an open sound box according to claim 1, characterized in that: The control subcircuit includes a resistor R5, a diode D1, a resistor R6, a polarity capacitor C1, a transistor Q1, a transistor Q2, a resistor R7 and a diode D2; One end of the resistor R5 and the positive electrode of the diode D1 are electrically connected to the detection sub-circuit, the other end of the resistor R5, one end of the resistor R7 and the negative electrode of the diode D2 are connected to a 5V working voltage, the negative electrode of the diode D1 and one end of the resistor R6 are electrically connected to the positive electrode of the polarity capacitor C1, the negative electrode of the polarity capacitor C1 is grounded, the other end of the resistor R6 is electrically connected to the base of the transistor Q1, the collector of the transistor Q1 is electrically connected to the base of the transistor Q2 and the other end of the resistor R7, and the collector of the transistor Q2 is electrically connected to the positive electrode of the diode D2 and the switching sub-circuit.

3. The control circuit of an open sound box according to claim 1, characterized in that: The switching subcircuit includes a relay RL1 and a socket P1 for electrically connecting to a speaker; Both ends of the coil of the relay RL1 are electrically connected to the control subcircuit, one of the normally closed contacts of the relay RL1 is electrically connected to the attenuation subcircuit, the other normally closed contact and one of the normally open contacts of the relay RL1 are electrically connected to the second end of the socket P1, the other normally open contact of the relay RL1 is electrically connected to the first end of the socket P1, the third end of the socket P1 is grounded, and the fourth end of the socket P1 is connected to a 5V working voltage.

4. The control circuit of an open sound box according to claim 1, characterized in that: The attenuation subcircuit includes a resistor R1, a resistor R2 and a variable resistor RV1; One end of the resistor R1 is electrically connected to the detection subcircuit, the other end of the resistor R1 is electrically connected to one end of the variable resistor RV1, and the other end of the variable resistor RV1 is electrically connected to one end of the resistor R2 and the switching subcircuit respectively.

5. An open speaker, characterized in that: A control circuit for an open sound box as described in any one of claims 1 to 4 is used.

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