Connector conversion circuit, wiring device and audio equipment

Abstract

The embodiments of the utility model relate to the technical field of audio equipment, and specifically to a connector conversion circuit, a wiring device, and an audio device. The embodiments of the utility model provide a power transmission circuit and a data transmission circuit, and connect the first connector and the second connector through the power transmission circuit and the data transmission circuit, so that the first connector and the second connector can be converted to each other. The first connector can be a TYPE-C connector, and the second connector can be a LIGHTNING connector. The accessories or audio equipment connected by the LIGHTNING connector can be converted to a TYPE-C connector, thereby realizing communication connection with other equipment. The problem of audio test instruments and computers identifying audio equipment is solved. The application scenarios of audio equipment are improved.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of audio equipment, and in particular to a connector conversion circuit, a wiring device and an audio equipment. Background Art

[0002] The Lightning interface is a connection technology developed by Apple, mainly used to connect Apple devices such as IPHONE, IPAD, etc. The Lightning interface uses an 8-pin design, 4 of which are used for data transmission and 4 for power supply. The data transmission rate of the Lightning interface can reach 480MBPS, and it can also be used for charging.

[0003] Introduction to TYPE-C interface TYPE-C interface is a universal connection interface, which is similar to the design of LIGHTNING interface, but has a wider range of applications. TYPE-C interface has the characteristics of two-way data transmission, fast charging, and support for large-capacity data transmission. It adopts the USB Type-C standard, with a data transmission rate of up to 10Gbps, and can also be used for power supply.

[0004] Currently, all audio devices and computers on the market can only identify devices with TYPE-C interfaces, but cannot identify devices with LIGHTNING interfaces, such as AudioPrecision, APX525audioanalyzer, soundcheck, computers, etc. As a result, equipment manufacturers who develop LIGHTNING interface products are unable to test various performance indicators of the products, such as frequency response, SNR, THD+N, delay, dynamic range, and RF indicators. Utility Model Content

[0005] In view of the above problems, the embodiments of the utility model provide a connector conversion circuit, a wiring device and an audio device, which solve the problem that the device cannot recognize the LIGHTNING interface, resulting in the device manufacturers who develop LIGHTNING interface products being unable to test various performance indicators of the product.

[0006] In a first aspect, the present application provides a connector conversion circuit, the circuit comprising:

[0007] A first connector, provided with a first power terminal, a first data terminal, and a second data terminal;

[0008] The second connector is provided with a second power supply terminal, a third data terminal, and a fourth data terminal;

[0009] a power transmission circuit, connected between the first power terminal and the second power terminal, for power transmission; and

[0010] A data transmission circuit, one end of which is connected to the first data terminal and the second data terminal respectively, and the other end of which is connected to the third data terminal and the fourth data terminal, for data transmission;

[0011] Wherein, the data transmission circuit is provided with a common mode filter to enable the signal to be stably transmitted between the first connector and the second connector.

[0012] In some optional embodiments, the data transmission circuit further includes a first voltage divider circuit, a second voltage divider circuit, a first anti-static circuit, and a second anti-static circuit;

[0013] The common mode filter is provided with a first connection end, a second connection end, a third connection end, and a fourth connection end. The first connection end is connected to the first data end through a first voltage divider circuit, and the fourth connection end is connected to the second data end through a second voltage divider circuit; the second connection end is connected in parallel with the third data end and the first anti-static circuit, and the third connection end is connected in parallel with the fourth data end and the second anti-static circuit; the other ends of the first anti-static circuit and the second anti-static circuit are grounded.

[0014] In some optional embodiments, in some optional embodiments, the first voltage divider circuit includes a first resistor, which is connected between the first connection terminal and the first data terminal; the second voltage divider circuit includes a second resistor, which is connected between the fourth connection terminal and the second data terminal.

[0015] In some optional embodiments, the first anti-static circuit includes a first electrostatic tube, the second anti-static circuit includes a second electrostatic tube, one end of the first electrostatic tube is connected to the second connecting end, the other end of the second electrostatic tube is connected to the third connecting end, and the other ends of the first electrostatic tube and the second electrostatic tube are grounded.

[0016] In some optional embodiments, the power transmission circuit includes a first filtering circuit, at least one third anti-static circuit,

[0017] One end of the first filter circuit is connected to the first power supply end and the other end is connected to the second power supply end;

[0018] One end of the third anti-static circuit is connected to the first power supply end and / or the second power supply end, and the other end of the third anti-static circuit is grounded.

[0019] In some optional embodiments, the first filtering circuit includes at least a first inductor, a first capacitor, and a second capacitor, the first inductor is connected to the first power supply terminal and the other end is connected to the second power supply terminal; the first capacitor and the second capacitor are connected in parallel to the second power supply terminal, and the other ends of the first capacitor and the second capacitor are grounded.

[0020] In some optional embodiments, the number of the third anti-static circuits is two, the two third anti-static circuits are respectively connected to the first power supply end and the second power supply end, the other end of the third anti-static circuit is grounded, and the third anti-static circuit includes a third electrostatic tube.

[0021] In some optional embodiments, the first connector is further provided with a first protection circuit and a second protection circuit;

[0022] The first protection circuit includes a third resistor, the third resistor is connected to the first protection terminal of the first connector, and the other end of the third resistor is grounded;

[0023] The second protection circuit includes a fourth resistor, a fifth resistor, and a third capacitor. The fourth resistor and the third capacitor are connected in parallel to the second protection end of the first connector. The other ends of the fourth resistor and the third capacitor are grounded through the fifth resistor.

[0024] In a second aspect, the present application provides a wiring device, including a housing, and a circuit board disposed in the housing, wherein the circuit board integrates the connector conversion circuit as described above.

[0025] In a third aspect, the present application provides an audio device, comprising an audio body and the above-mentioned wiring device, wherein the audio body is electrically connected to the wiring device, and the audio body is connected to an external device through the wiring device.

[0026] In summary, the present invention has at least the following benefits: The embodiment of the utility model provides a power transmission circuit and a data transmission circuit, and connects the first connector and the second connector through the power transmission circuit and the data transmission circuit, so that the first connector and the second connector can be converted to each other. The first connector can be a TYPE-C connector, and the second connector can be a LIGHTNING connector. The accessories or audio devices connected through the LIGHTNING connector can be converted to a TYPE-C connector, thereby realizing communication connection with other devices; solving the problem of audio test instruments and computers identifying audio devices. Improving the application scenarios of audio devices.

[0027] The above description is only an overview of the technical solution of the embodiment of the utility model. In order to more clearly understand the technical means of the embodiment of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are only used to illustrate the embodiments and are not considered to be limitations of the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0029] Figure 1 The circuit principle diagram of the connector conversion circuit provided by the utility model is shown;

[0030] Figure 2 The structure diagram of the wiring device provided by the utility model is shown;

[0031] Figure 3 The schematic diagram of the structure of the audio device provided by the utility model is shown.

[0032] Among them, J1, the first connector; J2, the second connector; 110, the power transmission circuit; 120, the data transmission circuit; R1, the first resistor; R2, the second resistor; R3, the third resistor; L1, the common mode filter; L2, the first inductor; D1, the first electrostatic tube; D2, the second electrostatic tube; D3, the third electrostatic tube; C1, the first capacitor; C2, the second capacitor; C3, the third capacitor; R4, the fourth resistor; R5, the fifth resistor; 210, the wiring device; 220, the connector conversion circuit; 310, the audio equipment. DETAILED DESCRIPTION

[0033] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein.

[0034] Example 1

[0035] Figure 1 The utility model shows a first embodiment of a connector conversion circuit 220, which includes: a first connector J1, provided with a first power terminal J1_VBUS, a first data terminal, and a second data terminal; a second connector J2, provided with a second data terminal J2_VBUS, a third data terminal J2_DM, and a fourth data terminal J2_DP; a power transmission circuit 110, connected between the first power terminal J1_VBUS and the second data terminal J2_VBUS, for power transmission; a data transmission circuit 120, one end of the data transmission circuit 120 is respectively connected to the first data terminal, the second data terminal J1_DN1, and the second data terminal J1_DN2, and the other end of the data transmission circuit 120 is connected to the third data terminal J2_DM and the fourth data terminal J2_DP for data transmission; wherein the data transmission circuit 120 is provided with a common mode filter L1 to enable the signal to be stably transmitted between the first connector J1 and the second connector J2.

[0036] In this embodiment, the first connector J1 may be a TYPE-C connector, and the second connector J2 may be a LIGHTNING connector, which may convert the accessory or audio device 310 connected via the LIGHTNING connector into a TYPE-C connector, thereby realizing communication connection with other devices; solving the problem of audio test instruments and computers identifying the audio device 310. Improve the application scenario of the audio device 310. Specifically, the first connector J1 may be a connector with a model number of USS421604-52216R, and the first power terminal J1_VBUS, the first data terminal J1_DP1, the first data terminal J1_DP2, the second data terminal J1_DN1, and the second data terminal J1_DN2 are the connection pins of the first connector J1. The second connector J2 may be a connector with a model number of LightningC37, and the second data terminal J2_VBUS, the third data terminal J2_DM, and the fourth data terminal J2_DP are the connection pins of the second connector J2.

[0037] In some optional embodiments, the data transmission circuit 120 also includes a first voltage divider circuit, a second voltage divider circuit, a first anti-static circuit, and a second anti-static circuit; the common mode filter L1 is provided with a first connection terminal L1_1, a second connection terminal L1_2, a third connection terminal L1_3, and a fourth connection terminal L1_4, the first connection terminal is connected to the first data terminal J1_DP1 and the first data terminal J1_DP2 through the first voltage divider circuit, and the fourth connection terminal is connected to the second data terminal J1_DN1 and the second data terminal J1_DN2 through the second voltage divider circuit; the second connection terminal is connected in parallel with the third data terminal J2_DM and the first anti-static circuit, and the third connection terminal is connected in parallel with the fourth data terminal J2_DP and the second anti-static circuit; the other ends of the first anti-static circuit and the second anti-static circuit are grounded. The first voltage divider circuit includes a first resistor R1, which is connected between the first connection terminal and the first data terminal J1_DP1 and the first data terminal J1_DP2; the second voltage divider circuit includes a second resistor R2, which is connected between the fourth connection terminal and the second data terminal J1_DN1 and the second data terminal J1_DN2. The first anti-static circuit includes a first electrostatic tube D1, and the second anti-static circuit includes a second electrostatic tube D2, one end of the first electrostatic tube D1 is connected to the second connection terminal, the other end of the second electrostatic tube D2 is connected to the third connection terminal, and the other ends of the first electrostatic tube D1 and the second electrostatic tube D2 are grounded.

[0038] In this embodiment, the main function of the common mode filter L1 is to suppress the common mode noise in the differential signal circuit. It forms a four-terminal device by winding two coils of the same size and number of turns on a ferrite ring core. This structure enables the common mode filter L1 to produce a large inductance suppression effect on the common mode noise, while the effect on the differential mode signal is minimal. When the current passes through the common mode inductor in a common mode manner, a superimposed magnetic flux will be generated in the magnetic ring, thereby generating a large inductance, which will produce a large impedance to the common mode current and play a suppressive role.

[0039] The first electrostatic tube D1 and the second electrostatic tube D2 are ESD electrostatic protection tubes. ESD electrostatic protection tubes are a commonly used overvoltage and electrostatic protection component that protects sensitive circuits in electronic devices from static electricity. The ESD electrostatic protection tube is connected in parallel in the circuit. When the circuit operates normally, the ESD electrostatic protection tube is in a high-resistance state and does not affect the normal operation of the circuit; when the circuit has an abnormal overvoltage and breakdown voltage, it quickly changes from a high-resistance state to a low-resistance state, providing an impedance conduction path for the instantaneous current, and clamping the abnormal voltage at a safe level, thereby protecting the IC or circuit. The first resistor R1 and the second resistor R2 are used for current limiting and voltage division in the data transmission circuit 120, and are used to protect equipment and accessories from damage such as overcurrent and overvoltage.

[0040] In some optional embodiments, the power transmission circuit 110 includes a first filter circuit, at least one third anti-static circuit, one end of the first filter circuit is connected to the first power supply terminal J1_VBUS and the other end is connected to the second power supply terminal; one end of the third anti-static circuit is connected to the first power supply terminal J1_VBUS and / or the second data terminal J2_VBUS, and the other end of the third anti-static circuit is grounded. In a specific example, the first filter circuit at least includes a first inductor L2, a first capacitor C1, and a second capacitor C2, the first inductor L2 is connected to the first power supply terminal J1_VBUS and the other end is connected to the second power supply terminal; the first capacitor C1 and the second capacitor C2 are connected in parallel to the second data terminal J2_VBUS, and the other ends of the first capacitor C1 and the second capacitor C2 are grounded. The number of the third anti-static circuit is two, and the two third anti-static circuits are respectively connected to the first power supply terminal J1_VBUS and the second data terminal J2_VBUS, and the other end of the third anti-static circuit is grounded, and the third anti-static circuit includes a third electrostatic tube D3. The first connector J1 is connected to the second connector J2 through a third electrostatic tube D3, a first inductor L2, a first capacitor C1, and a second capacitor C2 in sequence, so that the power transmission of the first connector J1 and the second connector J2 is carried out, and the noise is filtered through the first inductor L2, the first capacitor C1, and the second capacitor C2 to stabilize the circuit. And the third electrostatic tube D3 can be an ESD electrostatic protection tube for protecting the circuit.

[0041] In some optional embodiments, the first connector J1 is further provided with a first protection circuit and a second protection circuit;

[0042] The first protection circuit includes a third resistor R3, which is connected to the first protection terminal J1_CC2 of the first connector J1, and the other end of the third resistor R3 is grounded; wherein, the number of the first protection circuits may be two, and the first protection circuits are respectively connected to the two first protection terminals of the first connector J1. Specifically, the first protection circuit is the third resistor R3, and the third resistor R3 is used to perform current limiting, voltage dividing and other protections on the first connector J1.

[0043] The second protection circuit includes a fourth resistor R4, a fifth resistor R5, and a third capacitor C3. The fourth resistor R4 and the third capacitor C3 are connected in parallel to the second protection terminal J1_A of the first connector J1, and the other ends of the fourth resistor R4 and the third capacitor C3 are grounded through the fifth resistor R5. In this embodiment, the first connector J1 can be connected with the fourth resistor R4, the fifth resistor R5, and the third capacitor C3 to protect the device and accessories from damage such as overcurrent and overvoltage.

[0044] Embodiment 2,

[0045] Figure 2 The first embodiment of a wiring device 210 of the utility model is shown, comprising a housing, and a circuit board arranged in the housing, wherein the circuit board integrates the connector conversion circuit 220 as described in Example 1. The connector conversion circuit 220 is printed on the circuit board of the wiring device 210, and the wiring device 210 is used for connecting two different interface devices, specifically, it can be used to connect an IPHONE device, an IPAD device with an AudioPrecision, an APX525audioanalyzer, a soundcheck, a computer and other devices. The embodiment of the utility model sets a power transmission circuit 110 and a data transmission circuit 120, and connects the first connector J1 and the second connector J2 through the power transmission circuit 110 and the data transmission circuit 120, so that the first connector J1 and the second connector J2 can be converted to each other. Among them, the first connector J1 can be a TYPE-C connector, and the second connector J2 can be a LIGHTNING connector, which can convert the accessories or audio devices 310 connected by the LIGHTNING connector into a TYPE-C connector, thereby realizing communication connection with other devices; solving the problem of audio test instruments and computers identifying the audio device 310. Improve the application scenarios of the audio device 310.

[0046] Embodiment 3,

[0047] Figure 3The first embodiment of an audio device 310 of the utility model is shown, which includes an audio body and the above-mentioned wiring device 210. The audio body is electrically connected to the wiring device 210, and the audio body is connected to an external device through the wiring device 210. In this embodiment, the audio device 310 can be an audio test device, such as an audio test device, etc.; it can also be an audio application device, such as a microphone, a speaker, etc. The audio device 310 can be connected to any device through the wiring device 210, thereby improving the versatility of the audio device 310. The embodiment of the utility model sets a power transmission circuit 110 and a data transmission circuit 120, and connects the first connector J1 and the second connector J2 through the power transmission circuit 110 and the data transmission circuit 120, so that the first connector J1 and the second connector J2 can be converted to each other. Among them, the first connector J1 can be a TYPE-C connector, and the second connector J2 can be a LIGHTNING connector. The accessories or audio device 310 connected through the LIGHTNING connector can be converted into a TYPE-C connector, thereby realizing communication connection with other devices; solving the problem of audio test instruments and computers identifying the audio device 310. Improve the application scenarios of the audio device 310.

[0048] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. Similarly, in order to simplify the present invention and help understand one or more of the various aspects of the present invention, in the above description of the exemplary embodiments of the present invention, the various features of the embodiments of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. Among them, the claims that follow the specific embodiments are hereby expressly incorporated into the specific embodiments, wherein each claim itself serves as a separate embodiment of the present invention.

[0049] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and further may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive.

[0050] It should be noted that the above embodiments illustrate the utility model rather than limit the utility model, and those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation on the claims. The word "comprising" does not exclude the existence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the existence of multiple such elements. The utility model can be implemented by means of hardware including several different elements and by means of appropriately programmed computers. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names. The steps in the above embodiments should not be understood as limitations on the order of execution unless otherwise specified.

Claims

1. A connector conversion circuit, characterized in that: The circuit comprises: A first connector, provided with a first power terminal, a first data terminal, and a second data terminal; The second connector is provided with a second power supply terminal, a third data terminal, and a fourth data terminal; a power transmission circuit, connected between the first power terminal and the second power terminal, for power transmission; and A data transmission circuit, one end of which is connected to the first data terminal and the second data terminal respectively, and the other end of which is connected to the third data terminal and the fourth data terminal, for data transmission; Wherein, the data transmission circuit is provided with a common mode filter to enable the signal to be stably transmitted between the first connector and the second connector.

2. The connector conversion circuit according to claim 1, characterized in that: The data transmission circuit further includes a first voltage divider circuit, a second voltage divider circuit, a first anti-static circuit, and a second anti-static circuit; The common mode filter is provided with a first connection end, a second connection end, a third connection end, and a fourth connection end. The first connection end is connected to the first data end through a first voltage divider circuit, and the fourth connection end is connected to the second data end through a second voltage divider circuit; the second connection end is connected in parallel with the third data end and the first anti-static circuit, and the third connection end is connected in parallel with the fourth data end and the second anti-static circuit; the other ends of the first anti-static circuit and the second anti-static circuit are grounded.

3. The connector conversion circuit according to claim 2, characterized in that: The first voltage-dividing circuit includes a first resistor connected between the first connection terminal and the first data terminal; the second voltage-dividing circuit includes a second resistor connected between the fourth connection terminal and the second data terminal.

4. The connector conversion circuit according to claim 3, characterized in that: The first anti-static circuit includes a first electrostatic tube, and the second anti-static circuit includes a second electrostatic tube. One end of the first electrostatic tube is connected to the second connection end, and the other end of the second electrostatic tube is connected to the third connection end. The other ends of the first electrostatic tube and the second electrostatic tube are grounded.

5. The connector conversion circuit according to claim 1, characterized in that: The power transmission circuit includes a first filter circuit and at least one third anti-static circuit. One end of the first filter circuit is connected to the first power supply end and the other end is connected to the second power supply end; One end of the third anti-static circuit is connected to the first power supply end and / or the second power supply end, and the other end of the third anti-static circuit is grounded.

6. The connector conversion circuit according to claim 5, characterized in that: The first filtering circuit at least includes a first inductor, a first capacitor, and a second capacitor. The first inductor is connected to the first power supply terminal and the other end is connected to the second power supply terminal; the first capacitor and the second capacitor are connected in parallel to the second power supply terminal, and the other ends of the first capacitor and the second capacitor are grounded.

7. The connector conversion circuit according to claim 6, characterized in that: There are two third anti-static circuits, which are respectively connected to the first power supply end and the second power supply end. The other end of the third anti-static circuit is grounded, and the third anti-static circuit includes a third electrostatic tube.

8. The connector conversion circuit according to claim 1, characterized in that: The first connector is also provided with a first protection circuit and a second protection circuit; The first protection circuit includes a third resistor, the third resistor is connected to the first protection terminal of the first connector, and the other end of the third resistor is grounded; The second protection circuit includes a fourth resistor, a fifth resistor, and a third capacitor. The fourth resistor and the third capacitor are connected in parallel to the second protection end of the first connector. The other ends of the fourth resistor and the third capacitor are grounded through the fifth resistor.

9. A wiring device, characterized in that: It comprises a shell, and a circuit board arranged in the shell, wherein the circuit board integrates the connector conversion circuit as described in any one of claims 1-8.

10. An audio device, characterized in that: The invention comprises an audio body and the wiring device as claimed in claim 9, wherein the audio body is electrically connected to the wiring device, and the audio body is connected to an external device through the wiring device.

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