CN211240059U - Interphone earphone seat connecting circuit - Google Patents
Interphone earphone seat connecting circuit Download PDFInfo
- Publication number
- CN211240059U CN211240059U CN202020202729.8U CN202020202729U CN211240059U CN 211240059 U CN211240059 U CN 211240059U CN 202020202729 U CN202020202729 U CN 202020202729U CN 211240059 U CN211240059 U CN 211240059U
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- earphone
- wire
- connecting wire
- seat
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Abstract
The utility model provides a connecting circuit of an earphone seat of an interphone, which comprises a 2.5-inch connecting seat J3 and a 3.5-inch connecting seat J2 which are respectively provided with five connecting wires; in the 2.5-inch connecting seat J3, the 1 st connecting wire is grounded, the 2 nd connecting wire is a data wire, and the 4 th connecting wire is suspended; the 3 rd connecting wire is a power wire shared by the earphone and the loudspeaker; the 5 th connecting wire is an earphone insertion detection pin; in a 3.5-inch connecting seat J2, a 1 st connecting wire is connected with a 5V direct-current working power supply, the 1 st connecting wire is grounded by an anti-static TVS tube D3 and a bypass filter capacitor C4 respectively, a PTT signal is output through a diode D2, and the P pole of the diode is connected with the direction of the 1 st connecting wire; the 3 rd connecting wire is a data wire, the 4 th and 5 th connecting wires are suspended, and the 2 nd connecting wire is an earphone input channel. The utility model discloses modify earphone seat interface definition, prevent that intercom communication interface from damaging to keep apart audio circuit and data circuit, prevent audio interference.
Description
Technical Field
The utility model relates to a machine earphone field, especially an intercom earphone connecting seat.
Background
At present, two earphone seats, one 2.5 inch earphone seat and the other 3.5 inch earphone seat are arranged on the interphone. The intercom earphone seat follows a compatibility scheme, interfaces define 2.5-inch earphone seats as shown in figure 1, and 3.5-inch earphone seats as shown in figure 2 and comprise earphone PTT, earphone MIC, earphone insertion detection pins, earphone horns, ground and the like, wherein the 2.5-inch earphone seat is grounded through a first pin shown in figure 1, the 2 nd pin and the 4 th pin are suspended, and the 3 th pin and the 5 th pin are respectively connected with the earphone insertion detection pins and the earphone horns; the 3.5-inch earphone seat is shown in fig. 2, wherein pins 1 and 2 are respectively connected with an earphone PTT and an earphone MIC, and other pins are suspended. The earphone PPT is an abbreviation of Push to Talk in english, which is a function of speaking by pressing and pressing. With the increase of the data communication function of the interphone, data lines are added on the earphone seat of the interphone, namely a 2 nd pin of 2.5 inches and a 3 rd pin of 3.5 inches respectively, as shown in fig. 3 and 4.
At present, the connecting circuit of the earphone seat of the interphone easily causes the damage of the communication interface of the interphone and easily interferes the tone quality of the earphone speaker.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to present intercom earphone seat connecting circuit cause the damage of intercom communication interface easily and disturb earphone loudspeaker tone quality easily. A connection circuit of an earphone seat of an interphone is provided.
The utility model discloses realize that its technical purpose technical scheme is: a connecting circuit of an earphone seat of an interphone comprises a 2.5-inch connecting seat J3 and a 3.5-inch connecting seat J2 which are respectively provided with five connecting wires; in the 2.5-inch connecting seat J3, the 1 st connecting wire is grounded, the 2 nd connecting wire is a data wire, and the 4 th connecting wire is suspended; the 3 rd connecting wire is a power wire shared by the earphone and the loudspeaker; the 5 th connecting wire is an earphone insertion detection pin; when the earphone is not inserted, the 3 rd pin and the 5 th pin are connected; the 3 rd connecting wire is also grounded in parallel through a resistor R3 and a capacitor C7 and then connected with an inductor L3, then grounded through a TVS tube D6 and then connected with a parallel circuit of a capacitor C64 and a capacitor C65 and then connected with a loudspeaker; in the 3.5-inch connecting seat J2, the 1 st connecting line is connected with a 5V direct-current working power supply, the 1 st connecting line is grounded by an anti-static TVS tube D3 and a bypass filter capacitor C4 respectively, a PTT signal is output through a diode D2, and the P pole of the diode is connected with the direction of the 1 st connecting line; the 3 rd connecting wire is a data wire, the 4 th connecting wire and the 5 th connecting wire are suspended, the 2 nd connecting wire is an earphone input channel, and a filter circuit consisting of an inductor L2 and a capacitor C11 is arranged between the earphone input channel and the ground.
The utility model discloses modify earphone seat interface definition, prevent that intercom communication interface from damaging to keep apart audio circuit and data circuit, prevent audio interference.
Further, among the above-mentioned intercom earphone seat connecting circuit: and a current limiting resistor R10 is also arranged between the filter circuit consisting of the inductor L2 and the capacitor C11 and the ground.
Further, among the above-mentioned intercom earphone seat connecting circuit: 2.5 cun connecting seat J3 in the earphone insert detect the foot still establish ties and have resistance R9, resistance R9 when the earphone is not inserted, constitute partial pressure resistance in pairs with resistance R13, for detecting pull-up resistance when the earphone is not inserted.
The present invention will be described in more detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a wiring diagram of a 2.5-inch connecting base of a current interphone earphone.
FIG. 2 is a wiring diagram of a 3.5-inch connecting base of the earphone of the conventional interphone.
FIG. 3 is a wiring diagram of a 2.5-inch connecting base of the earphone of the conventional interphone (with a data line).
FIG. 4 is a wiring diagram of a 3.5-inch connecting base of the current interphone earphone (with a data line).
Fig. 5 is the connection circuit of the earphone seat of the middle intercom of the utility model.
Detailed Description
The embodiment is an interphone earphone seat connecting circuit, which is used for modifying earphone seat interface definition, preventing an interphone communication interface from being damaged, isolating an audio circuit and a data circuit and preventing audio interference.
As shown in fig. 5, the connection circuit of the earphone jack of the interphone of the present embodiment includes a 2.5-inch connection jack J3 and a 3.5-inch connection jack J2 having five connection wires, respectively.
In the 2.5-inch connecting seat J3, the 1 st connecting wire is grounded, the 2 nd connecting wire is a data wire, and the 4 th connecting wire is suspended; the 3 rd connecting wire is a power wire shared by the earphone and the loudspeaker; the 5 th connecting wire is an earphone insertion detection pin; when the earphone is not inserted, the 3 rd pin and the 5 th pin are connected; the 3 rd connecting wire is also grounded in parallel through a resistor R3 and a capacitor C7 and then connected with an inductor L3, then grounded through a TVS tube D6 and then connected with a parallel circuit of a capacitor C64 and a capacitor C65 and then connected with a loudspeaker; the earphone insertion detection pin in the 2.5-inch connecting seat J3 is also connected with a resistor R9 in series, and the resistor R9 and the resistor R13 form a pair of ground voltage division resistors when the earphone is not inserted, and the ground voltage division resistors are used for detecting a pull-up resistor when the earphone is not inserted.
In a 3.5-inch connecting seat J2, a 1 st connecting wire is connected with a 5V direct-current working power supply, the 1 st connecting wire is grounded by an anti-static TVS tube D3 and a bypass filter capacitor C4 respectively, a PTT signal is output through a diode D2, and the P pole of the diode is connected with the direction of the 1 st connecting wire; the 3 rd connecting wire is a data wire, the 4 th connecting wire and the 5 th connecting wire are suspended, the 2 nd connecting wire is an earphone input channel, and a filter circuit consisting of an inductor L2 and a capacitor C11 is arranged between the earphone input channel and the ground. A current limiting resistor R10 is also provided between the filter circuit composed of the inductor L2 and the capacitor C11 and the ground.
Specifically, as shown in fig. 5: the earphone seat audio interface consists of a 1 st pin PTT and a 2 nd pin MIC of a 3.5-inch connecting seat JB2, and a 1 st pin GND, a 3 rd pin SPK and a 5 th pin DET of a 2.5-inch connecting seat JB 3.
As shown in the figure, the earphone seat communication interface is composed of a 3.5-inch connecting seat with a 1 st pin of 5V and a 3 rd pin of data + and a 2.5-inch earphone seat with a 1 st pin of GND and a 2 nd pin of data-.
3.5 cun is connected with the JB2 No. 1 foot channel, and D3 is a TVS tube and plays a role in static electricity prevention; c4 is a bypass filter capacitor; d2 prevents 5V from connecting to PTT module pins. 3.5 cun connecting seat 3 rd foot, be data + interface.
The 4 th and 5 th feet of the 3.5 inch junction box JB2 are suspended feet.
3.5 cun connecting seat JB2 nd foot, for earphone MIC input channel, inductance L2, electric capacity C11 constitute filter circuit, carry out filtering process to earphone MIC input signal.
Pin 2.5 of connection JB3, data interface.
The 4 th foot of 2.5 cun junction box JB3 is a suspended foot.
2.5 th foot of JB3 connection base, insert the detection pin for earphone. When the earphone is not inserted, the 3 rd pin and the 5 th pin of the 2.5-inch connecting base are connected, R13 is a divider resistor which divides voltage with R9, DET is low voltage, and the earphone is not inserted; when the earphone is inserted, the 3 rd pin and the 5 th pin of the 2.5-inch connecting base are separated, when the R9 is DET earphone is not inserted, the DET is high voltage, which indicates that the earphone is inserted. C64 and C65 are blocking capacitors.
2.5 inches connecting seat pin 3, for earphone speaker output pin, wherein L3 and C64, C65 are earphone speaker channels.
Claims (3)
1. A connecting circuit of an earphone seat of an interphone comprises a 2.5-inch connecting seat J3 and a 3.5-inch connecting seat J2 which are respectively provided with five connecting wires; the method is characterized in that:
in the 2.5-inch connecting seat J3, the 1 st connecting wire is grounded, the 2 nd connecting wire is a data wire, and the 4 th connecting wire is suspended; the 3 rd connecting wire is a power wire shared by the earphone and the loudspeaker; the 5 th connecting wire is an earphone insertion detection pin; when the earphone is not inserted, the 3 rd pin and the 5 th pin are connected; the 3 rd connecting wire is also grounded in parallel through a resistor R3 and a capacitor C7 and then connected with an inductor L3, then grounded through a TVS tube D6 and then connected with a parallel circuit of a capacitor C64 and a capacitor C65 and then connected with a loudspeaker;
in the 3.5-inch connecting seat J2, the 1 st connecting line is connected with a 5V direct-current working power supply, the 1 st connecting line is grounded by an anti-static TVS tube D3 and a bypass filter capacitor C4 respectively, a PTT signal is output through a diode D2, and the P pole of the diode is connected with the direction of the 1 st connecting line; the 3 rd connecting wire is a data wire, the 4 th connecting wire and the 5 th connecting wire are suspended, the 2 nd connecting wire is an earphone input channel, and a filter circuit consisting of an inductor L2 and a capacitor C11 is arranged between the earphone input channel and the ground.
2. The intercom earphone jack connection circuit according to claim 1, wherein: and a current-limiting resistor R10 is also arranged between the filter circuit consisting of the inductor L2 and the capacitor C11 and the ground.
3. The intercom earphone jack connection circuit according to claim 1, wherein: 2.5 cun connecting seat J3 in the earphone insert detect the foot still establish ties there is resistance R9, resistance R9 when the earphone is not inserted, constitute ground divider resistance in pairs with resistance R13, for detecting pull-up resistance when the earphone is not inserted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020202729.8U CN211240059U (en) | 2020-02-24 | 2020-02-24 | Interphone earphone seat connecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020202729.8U CN211240059U (en) | 2020-02-24 | 2020-02-24 | Interphone earphone seat connecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211240059U true CN211240059U (en) | 2020-08-11 |
Family
ID=71921897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020202729.8U Expired - Fee Related CN211240059U (en) | 2020-02-24 | 2020-02-24 | Interphone earphone seat connecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211240059U (en) |
-
2020
- 2020-02-24 CN CN202020202729.8U patent/CN211240059U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200811 |