CN220732990U - Play switching circuit and play switching intelligent control machine - Google Patents
Play switching circuit and play switching intelligent control machine Download PDFInfo
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- CN220732990U CN220732990U CN202322424145.1U CN202322424145U CN220732990U CN 220732990 U CN220732990 U CN 220732990U CN 202322424145 U CN202322424145 U CN 202322424145U CN 220732990 U CN220732990 U CN 220732990U
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Abstract
The utility model relates to a play switching circuit and a play switching intelligent control machine, wherein the play switching circuit comprises a sound source switching circuit, the sound source switching circuit comprises at least two sound source input interfaces, at least one sound source output interface and a sound source switching control driving circuit, and each sound source input interface is connected with a common point through a relay thereof; all sound source output interfaces are connected with the common point; the sound source switching control driving circuit comprises a sound source switching main control chip and a sound source switching relay driving circuit, wherein the sound source switching main control chip is connected with relays of all sound source input interfaces through the sound source switching relay driving circuit and is used for controlling the sound source switching relay driving circuit to work so that the relay with at most one sound source input interface is electrically closed. The utility model switches the sound source input interface through the sound source switching main control chip, can ensure single sound source input, and is reliable and easy to operate.
Description
Technical Field
The utility model relates to the field of play switching, in particular to a play switching circuit and a play switching intelligent control machine.
Background
In a foreign language hearing test in school, at least two sound source input devices are often provided to cope with an abnormal situation, and a standby device is put into operation after a main device fails, but the standby device is put into operation, the line of the failed device needs to be pulled out first, then the line of the standby device is connected, and a teacher generally switches the line, so that the common teacher is not always familiar with the wiring operation, and therefore, sometimes, the switching is difficult to smoothly and quickly complete. The main equipment and the standby equipment are connected by the mechanical switch in advance, when the main equipment is required to be switched, the main equipment is firstly turned off by the mechanical switch, and then the standby equipment is turned on by the mechanical switch, and the switching process needs to operate the mechanical switch at least twice successively.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a play switching circuit which switches a sound source input interface through a sound source switching main control chip, can ensure single sound source input and is reliable and easy to operate.
In order to solve the technical problems, the technical scheme of the utility model is as follows: a playback switching circuit comprising a sound source switching circuit, the sound source switching circuit comprising:
at least two sound source input interfaces, each sound source input interface is connected with a common point through a relay thereof;
at least one sound source output interface connected with the common point;
the sound source switching control driving circuit comprises a sound source switching main control chip and a sound source switching relay driving circuit, wherein the sound source switching main control chip is connected with relays of all sound source input interfaces through the sound source switching relay driving circuit and is used for controlling the sound source switching relay driving circuit to work so that the relay with at most one sound source input interface is electrically closed.
Further, the sound source switching control driving circuit further comprises a sound source total-off key and a sound source switching key corresponding to the sound source input interfaces one by one, wherein the sound source total-off key and the sound source switching key are respectively connected with the sound source switching main control chip, and the sound source switching main control chip is configured to:
when a certain sound source switching key is pressed, controlling the relay of the sound source input interface corresponding to the sound source switching key to be closed and controlling the relay of other sound source input interfaces to be opened; and controlling the relays of all the sound source input interfaces to be disconnected when the sound source total-off key is pressed.
The sound source switching circuit further comprises a sound source switching power supply circuit which is respectively connected with the sound source switching main control chip and the sound source switching relay driving circuit to supply power.
The specific structure of the sound source switching power supply circuit is further provided, the sound source switching power supply circuit comprises a transformer and a voltage stabilizer which are connected in series, and the transformer is connected with a mains supply interface.
Further for the convenience of knowing which sound source input interface is in the operating condition, the sound source switching circuit still includes sound source indicating circuit, sound source indicating circuit include with the pilot lamp of sound source input interface one-to-one, the pilot lamp is parallelly connected with the coil of the relay of corresponding sound source input interface.
Further, in order to perform coupling filtering on the sound source, the sound source switching circuit further comprises a coupling circuit corresponding to the sound source output interface, and the sound source output interface is connected with the common point through the corresponding coupling circuit.
Further, the coupling circuit includes a capacitor.
In order to further enable the play switching circuit to supply power to other electrical appliances, the play switching circuit further comprises at least one direct power supply interface, and the direct power supply interface is electrically connected with the mains supply interface.
Further, the play switching circuit further includes a power switching circuit, the power switching circuit including:
a mains interface;
at least two controlled power interfaces, each controlled power interface is connected with the mains supply interface through a relay thereof;
the power supply switching control driving circuit comprises a power supply switching main control chip and a power supply switching relay driving circuit, wherein the power supply switching main control chip is connected with relays of all controlled power supply interfaces through the power supply switching relay driving circuit and is used for controlling the power supply switching relay driving circuit to work so that the relay with at most one controlled power supply interface is electrically closed.
The utility model also provides a play switching intelligent control machine, which comprises a play switching circuit.
After the technical scheme is adopted, when the foreign language hearing test device is used, each sound source input interface is connected with one sound source input device, after the main sound source input device or the sound source input interface fails, the main sound source switching control chip is directly utilized to switch to the standby sound source input device and the standby sound source input interface, and the fact that only one sound source input device is always communicated with a common point can be guaranteed, the operation is simple, the switching mode is reliable, and therefore normal running of the foreign language hearing test can be guaranteed. The utility model also connects a plurality of sound source output interfaces at a common point, each sound source output interface has the same sound source input, and after the failure of the main sound source output interface or the equipment connected with the sound source output interface, the standby sound source output interface and the equipment connected with the standby sound source output interface can be used, thereby further improving the reliability.
Drawings
FIG. 1 is a schematic block diagram of a sound source switching circuit of a playback switching circuit according to the present utility model;
FIG. 2 is a schematic block diagram of a power switching circuit of the playback switching circuit of the present utility model;
FIG. 3 is a circuit diagram of an audio source switching circuit of the playback switching circuit according to the present utility model;
FIG. 4 is a circuit diagram of a power switching circuit of the playback switching circuit of the present utility model;
in the figure, 1a, a sound source input interface; 2a, a sound source output interface; 3a, a sound source switching main control chip; 4a, a sound source switching relay driving circuit; 5a, a sound source total-closing key; 6a, a sound source switching key; 7a, a sound source switching power supply circuit; 8a, a sound source indication circuit; 9a, a coupling circuit;
1b, a mains supply interface; 2b, a controlled power interface; 3b, a power supply switching main control chip; 4b, a power supply switching relay driving circuit; 5b, a power supply full-off key; 6b, a power supply switching key; 7b, a power supply switching power supply circuit; 8b, a power supply indication circuit;
10. a direct power supply interface.
Detailed Description
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Example 1
As shown in fig. 1 and 3, a play switching circuit includes a sound source switching circuit, the sound source switching circuit includes:
at least two sound source input interfaces 1a, each sound source input interface 1a is connected with a common point through a relay thereof;
at least one sound source output interface 2a connected to the common point;
the sound source switching control driving circuit comprises a sound source switching main control chip 3a and a sound source switching relay driving circuit 4a, wherein the sound source switching main control chip 3a is connected with relays of all the sound source input interfaces 1a through the sound source switching relay driving circuit 4a and is used for controlling the sound source switching relay driving circuit 4a to work so that the relay with at most one sound source input interface 1a is electrically closed.
Specifically, when in use, each sound source input interface 1a is connected with one sound source input device, after the main sound source input device or the sound source input interface 1a fails, the main sound source switching control chip 3a is directly utilized to switch to the standby sound source input device and the standby sound source input interface 1a, and only one sound source input device is always communicated with a common point, so that the operation is simple, the switching mode is reliable, and the normal running of a foreign language hearing test can be ensured. In addition, in this embodiment, a plurality of sound source output interfaces 2a are connected at a common point, each sound source output interface 2a has the same sound source input, and after the failure of the main sound source output interface 2a or the equipment connected with the sound source output interface 2a, the standby sound source output interface 2a and the equipment connected with the standby sound source output interface 2a can be used, so that the reliability is further improved.
Note that the number of the sound source input interfaces 1a may be 2, 3, 4, 5, etc. as needed, and the number of the sound source output interfaces 2a may be 1, 2, 3, 4, 5, etc. as needed, which is not limited herein. AS shown in fig. 3, the type of the sound source switching master control chip 3a may be, but not limited to, STC15W408AS, the sound source switching relay driving circuit 4a may be a relay driving chip, and the type may be, but not limited to, ULN2003D. The I/O port of the sound source switching main control chip 3a is connected with the input end of the sound source switching relay driving circuit 4, and the output end of the sound source switching relay driving circuit 4 is connected with the relay of the sound source input interface 1 a. In addition, each of the sound source input interfaces 1a and each of the sound source output interfaces 2a includes a left sound channel port, a right sound channel port, and a ground port, respectively. The main control chip 3a for switching the sound source is also connected with an electrically erasable EEPROM memory, which can realize data storage and abnormal reset. The model of the electrically erasable EEPROM memory may be, but is not limited to, AT24C02.
Example two
On the basis of the first embodiment, as shown in fig. 1 and 3, the sound source switching control driving circuit further includes a sound source total-off key 5a and a sound source switching key 6a corresponding to the sound source input interface 1a one by one, the sound source total-off key 5a and the sound source switching key 6a are respectively connected with the sound source switching main control chip 3a, and the sound source switching main control chip 3a is configured to:
when a certain sound source switching key 6a is pressed, controlling the relay of the sound source input interface 1a corresponding to the sound source switching key 6a to be closed and controlling the relay of other sound source input interfaces 1a to be opened; and controls the relays of all the sound source input interfaces 1a to be turned off when the sound source total-off key 5a is pressed.
Specifically, the sound source total-closing key 5a and the sound source input interface 1a are arranged, so that the sound source total-closing key is convenient to use for performing sound source switching operation, and one-key seamless butt joint switching or closing can be realized. As shown in fig. 3, the sound source total-off key 5a and one contact of each sound source switching key 6a are respectively connected to one I/O port of the sound source switching main control chip 3a, and the other contact is grounded. The sound source total-closing key 5a and each sound source switching key 6a may be a self-resetting light-touch type micro-key.
Example III
On the basis of the first embodiment or the second embodiment, as shown in fig. 1 and 3, the audio switching circuit further includes an audio switching power supply circuit 7a, and the audio switching power supply circuit 7a is respectively connected to the audio switching main control chip 3a and the audio switching relay driving circuit 4a to supply power.
The sound source power supply circuit 7a is arranged, so that the sound source switching main control chip 3a and the sound source switching relay driving circuit 4a can be directly powered, the trouble of an external power supply module is avoided, and the wiring operation can be conveniently completed before use.
The audio source switching power supply circuit 7a may include, but is not limited to, a transformer and a voltage stabilizer connected in series, wherein the transformer is connected to the mains interface 1b. The transformer converts the commercial power into 9V alternating current, and the voltage stabilizer converts the 9V alternating current into 5V direct current, so that the voice source switching main control chip 3a and the voice source switching relay driving circuit 4a are powered. The voltage regulator may be of the type IC57805.
Example IV
On the basis of any one of the first, second and third embodiments, as shown in fig. 1 and 3, the sound source switching circuit further includes a sound source indicating circuit 8a, where the sound source indicating circuit 8a includes indicator lamps corresponding to the sound source input interfaces 1a one by one, and the indicator lamps are connected in parallel with coils of relays of the corresponding sound source input interfaces 1 a.
Specifically, the sound source indicating circuit 8a is provided, so that an operator can know which sound source input interface 1a is working by knowing which relay of the sound source input interface 1a is in a closed state.
As shown in fig. 3, the indicator lamp is an LED lamp, one contact of the coil of the relay of the sound source input interface 1a is connected to the 5V power supply end, the other contact is connected to the output end of the sound source switching relay driving circuit 4a, one end of the indicator lamp is connected to the 5V power supply end, and the other end is also connected to the corresponding output end of the sound source switching relay driving circuit 4 a. Therefore, the sound source switching main control chip 3a simultaneously realizes control of the relay and the indicator lamp of the sound source input interface 1a through the sound source switching relay driving circuit 4 a.
Example five
On the basis of any one of the first to fourth embodiments, as shown in fig. 1 and 3, the audio switching circuit further includes a coupling circuit 9a corresponding to the audio output interface 2a, and the audio output interface 2a is connected to the common point through the corresponding coupling circuit 9 a.
Specifically, the interference can be removed and the noise can be reduced by the coupling circuit 9a, and the coupling circuit 9a can be, but is not limited to, a capacitor.
Example six
On the basis of any one of the first to fifth embodiments, as shown in fig. 2 and 4, the play switching circuit further includes at least one direct power supply interface 10, where the direct power supply interface 10 is electrically connected to the mains supply interface 1b.
The number of the direct power supply interfaces 10 may be 1, 2, 3, 4, etc. as needed, and is not limited herein. After the direct power supply interface 10 is arranged, the electric appliance can be powered by the play switching circuit as long as the commercial power interface 1b is connected with the commercial power, so that the trouble is saved, and the dependence on an external socket is eliminated. The direct power supply interface 10 may supply power to the audio input device connected to the audio input interface 1a through a signal, may supply power to the fm broadcast transmitter connected to the audio output interface 2a, and may also supply power to other electrical appliances.
Example seven
As shown in fig. 2 and 4, the playback switching circuit further includes a power switching circuit, which includes:
a mains interface 1b;
at least two controlled power interfaces 2b, each controlled power interface 2b being connected to the mains interface 1b by its relay;
the power supply switching control driving circuit comprises a power supply switching main control chip 3b and a power supply switching relay driving circuit 4b, wherein the power supply switching main control chip 3b is connected with relays of all the controlled power supply interfaces 2b through the power supply switching relay driving circuit 4b, and is used for controlling the power supply switching relay driving circuit 4b to work so that the relay with at most one controlled power supply interface 2b is electrically closed.
Specifically, the power supply switching circuit is arranged so that only one controlled power supply interface 2b can supply power, and further, only one of the devices connected with each controlled power supply interface 2b is electrified and can work, so that the working device can be conveniently switched.
Of course, the device electrically connected to the controlled power interface 2b may be fm broadcast transmitters, where each fm broadcast transmitter is connected to one controlled power interface 2b and is connected to one audio output interface 2a by a signal, and after the main audio output interface 2a or the fm broadcast transmitter fails, the controlled power interface 2b may be switched by the power switching circuit, so that only one fm broadcast transmitter is powered on each time, and the fm broadcast transmitters may work, thereby ensuring that the fm broadcast transmitters will not generate co-channel interference.
AS shown in fig. 4, the power switching master control chip 3b may be, but not limited to, STC15W408AS, the power switching relay driving circuit 4b may be a relay driving chip, and the power switching master control chip may be, but not limited to, ULN2003D. The power switching circuit further includes a power total-off key 5b, a power switching key 6b, a power switching power supply circuit 7b, and a power source indication circuit 8b, and the specific circuit structure and connection manner are the same as or similar to those of the sound source switching circuit, which are not described in detail herein.
Example eight
A play switching intelligent control machine comprises a play switching circuit as in any one of the first-seventh embodiments.
With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.
Claims (10)
1. A play switching circuit is characterized in that,
the audio source switching circuit comprises an audio source switching circuit, wherein the audio source switching circuit comprises:
at least two sound source input interfaces (1 a), each sound source input interface (1 a) is connected with a common point through a relay thereof;
at least one sound source output interface (2 a) connected to the common point;
the sound source switching control driving circuit comprises a sound source switching main control chip (3 a) and a sound source switching relay driving circuit (4 a), wherein the sound source switching main control chip (3 a) is connected with relays of all sound source input interfaces (1 a) through the sound source switching relay driving circuit (4 a) and is used for controlling the sound source switching relay driving circuit (4 a) to work so that the relay with at most one sound source input interface (1 a) is electrically closed.
2. The playback switching circuit of claim 1, wherein,
the sound source switching control driving circuit further comprises a sound source total-closing key (5 a) and a sound source switching key (6 a) which is in one-to-one correspondence with the sound source input interface (1 a), the sound source total-closing key (5 a) and the sound source switching key (6 a) are respectively connected with the sound source switching main control chip (3 a), and the sound source switching main control chip (3 a) is configured to:
when a certain sound source switching key (6 a) is pressed, controlling the relay of a sound source input interface (1 a) corresponding to the sound source switching key (6 a) to be closed and controlling the relay of other sound source input interfaces (1 a) to be opened; and controlling the relays of all the sound source input interfaces (1 a) to be disconnected when the sound source total-off key (5 a) is pressed.
3. The playback switching circuit of claim 1, wherein,
the sound source switching circuit further comprises a sound source switching power supply circuit (7 a), and the sound source switching power supply circuit (7 a) is respectively connected with the sound source switching main control chip (3 a) and the sound source switching relay driving circuit (4 a) to supply power.
4. The playback switching circuit as recited in claim 3, wherein,
the sound source switching power supply circuit (7 a) comprises a transformer and a voltage stabilizer which are connected in series, and the transformer is connected with the mains interface (1 b).
5. The playback switching circuit of claim 1, wherein,
the sound source switching circuit further includes:
the sound source indicating circuit (8 a) comprises indicator lamps which are in one-to-one correspondence with the sound source input interfaces (1 a), and the indicator lamps are connected with coils of relays of the corresponding sound source input interfaces (1 a) in parallel.
6. The playback switching circuit of claim 1, wherein,
the sound source switching circuit further comprises a coupling circuit (9 a) corresponding to the sound source output interface (2 a), and the sound source output interface (2 a) is connected with the common point through the corresponding coupling circuit (9 a).
7. The playback switching circuit of claim 6, wherein,
the coupling circuit (9 a) comprises a capacitor.
8. The playback switching circuit of claim 1, wherein,
the direct power supply system further comprises at least one direct power supply interface (10), and the direct power supply interface (10) is electrically connected with the mains supply interface (1 b).
9. The playback switching circuit of claim 1, wherein,
the power supply switching circuit is also included, the power supply switching circuit includes:
a mains interface (1 b);
at least two controlled power interfaces (2 b), each controlled power interface (2 b) being connected to the mains interface (1 b) by its relay;
the power supply switching control driving circuit comprises a power supply switching main control chip (3 b) and a power supply switching relay driving circuit (4 b), wherein the power supply switching main control chip (3 b) is connected with the relays of all the controlled power supply interfaces (2 b) through the power supply switching relay driving circuit (4 b) and is used for controlling the power supply switching relay driving circuit (4 b) to work so that the relay with at most one controlled power supply interface (2 b) is electrically closed.
10. A play switching intelligent control machine is characterized in that,
comprising a play-switching circuit as claimed in any of the claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322424145.1U CN220732990U (en) | 2023-09-06 | 2023-09-06 | Play switching circuit and play switching intelligent control machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322424145.1U CN220732990U (en) | 2023-09-06 | 2023-09-06 | Play switching circuit and play switching intelligent control machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220732990U true CN220732990U (en) | 2024-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322424145.1U Active CN220732990U (en) | 2023-09-06 | 2023-09-06 | Play switching circuit and play switching intelligent control machine |
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| Country | Link |
|---|---|
| CN (1) | CN220732990U (en) |
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2023
- 2023-09-06 CN CN202322424145.1U patent/CN220732990U/en active Active
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