A high compatibility microphone

Abstract

The present invention provides a high-compatibility microphone, which relates to the technical field of microphones. The high-compatibility microphone comprises a microphone head (3); and a four-stage headphone plug (1) for outputting an audio signal picked up by the microphone head (3); the microphone further comprises a mode switching device (2), the mode switching device being connected between the microphone head and the four-stage headphone plug, and being used to switch the connection position of the microphone head (3) and the ground at the four-stage headphone plug (1), so that the signal output position of the four-stage headphone plug (1) is compatible with a three-stage headphone socket, a four-stage national standard headphone socket or a four-stage international standard headphone socket. The microphone has the characteristics of good compatibility, simple circuit, compact structure, and easy miniaturization.

Description

Technical Field

[0001] The present invention relates to the field of microphones, and in particular to a high-compatibility microphone, which can be adapted to devices using a three-stage headphone socket as an audio input interface, devices using a four-stage national standard headphone socket as an audio input interface, and devices using a four-stage international standard headphone socket as an audio input interface. Background Art

[0002] With the development of various electronic products, the headphone interface has become an important audio input method. The headphone interface consists of a plug (male) and a socket (female).

[0003] The mainstream in the market is basically 3.5MM headphone plug. However, 3.5MM headphone plugs are divided into three-stage and four-stage types. The circuit of the three-stage type is as follows: Figure 1 As shown, L represents the left channel, R represents the right channel, and G represents the ground. The four-stage type is divided into two types: national standard (OMTP) and international standard (CITA, also known as the American standard). The circuit of the four-stage national standard is as follows Figure 2 As shown, the four-stage international standard circuit is as follows Figure 3 As shown, L represents the left channel, R represents the right channel, G represents the ground, and M represents the microphone. It can be seen that the difference between the two is that the positions of the ground and the microphone are opposite.

[0004] Due to the existence of the above-mentioned multiple specifications of headphone plugs, the microphone cannot be used for devices that use different headphone sockets as audio input interfaces, that is, the compatibility is poor.

[0005] In order to solve the compatibility problem, some people proposed to add an adapter; others proposed to add an MCU and a switching circuit, where the MCU detects the electrical parameters of each segment to identify the specifications of the headphone plug and then controls the switching circuit to complete the circuit conversion. However, the former has defects such as poor quality and inconvenience in use, while the latter has defects such as complex solutions, high costs, and is not suitable for microphone applications.

[0006] In view of the above problems in the prior art, the present invention is proposed. Summary of the invention

[0007] The purpose of the present invention is to provide a high-compatibility microphone to solve the above-mentioned defects in the prior art.

[0008] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0009] A high-compatibility microphone comprises a microphone (3) and a four-section earphone plug (1) for outputting an audio signal picked up by the microphone (3); the microphone further comprises a mode switching device (2), the mode switching device (2) being connected between the microphone (3) and the four-section earphone plug (1) and being used to switch the connection position of the microphone (3) and the ground on the four-section earphone plug (1), so that the signal output position of the four-section earphone plug (1) is compatible with a three-section earphone socket, a four-section national standard earphone socket or a four-section international standard earphone socket serving as an audio input interface.

[0010] Preferably, the mode switching device (2) is also provided with a battery (22), and when the signal output position of the four-stage headphone plug (1) matches the three-stage headphone socket serving as the audio input interface, the battery (22) is connected to the four-stage headphone plug (1) to provide a bias voltage.

[0011] Preferably, the switching element of the mode switching device (2) is composed of a universal double-pole three-speed toggle switch (21) and a metal sheet (24); the metal sheet (24) is mounted on an operating handle (211) of the double-pole three-speed toggle switch (21) and cooperates with a contact electrode on a circuit board (23) to form a linkage switch (20) that is linked to the double-pole three-speed toggle switch (21).

[0012] Preferably, the metal sheet (24) comprises a base plate (241), a mounting hole (242) is provided in the middle of the base plate (241), a slide groove (243) is formed by bending one side of the base plate (241), the metal sheet (24) is assembled on the operating handle (211) of the double-pole three-speed toggle switch (21) through the mounting hole (242), and the slide groove (243) is slidably matched with the circuit board (23).

[0013] Preferably, the mode switching device (2) is also provided with a clip (26) for wearing.

[0014] Preferably, the mode switching device (2) is also provided with a compartment cover (29) for opening and closing the battery compartment.

[0015] Preferably, the circuit board (23), the battery (22) and the clip (26) are combined together via a bracket (27).

[0016] Preferably, the mode switching device (2) is arranged on a wire (4) between the microphone (3) and the four-section headphone plug (1).

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] The microphone of the present invention has a mode switching device and can be adapted to a three-stage headphone socket, a four-stage national standard headphone socket or a four-stage international standard headphone socket as an audio input interface, and has good compatibility.

[0019] It adopts a universal double-pole three-speed toggle switch and a metal sheet to form a switching element, and has the characteristics of simple circuit, compact structure, and easy miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the circuit diagram of a three-section headphone plug;

[0021] Figure 2 This is the circuit diagram of the four-section national standard headphone plug;

[0022] Figure 3 This is the circuit diagram of the four-section international standard headphone plug;

[0023] Figure 4 This is a schematic diagram of the structure of the high-compatibility microphone;

[0024] Figure 5 This is the circuit diagram of this high-compatibility microphone;

[0025] Figure 6 An exploded view of the mode switching device;

[0026] Figure 7 is a schematic diagram of the structure of a metal sheet;

[0027] Figure 8 It is a schematic diagram of the assembly of the metal sheet, the double-pole three-speed toggle switch and the circuit board;

[0028] Reference numerals:

[0029] 1. Four-section headphone plug;

[0030] 2. Mode switching device; 20. Linkage switch; 21. Double-pole three-speed toggle switch; 211. Operating handle; 22. Battery; 23. Circuit board; 24. Metal sheet; 241. Base plate; 242. Mounting hole; 243. Slide; 25. Switch cap; 26. Clip; 27. Bracket; 28. Housing; 29. ​​Compartment cover;

[0031] 3. Microphone;

[0032] 4. Wire. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] Please refer to Figure 4The high-compatibility microphone includes: a microphone 3 and a four-stage headphone plug 1. The four-stage headphone plug 1 and the microphone 3 are connected through a wire 4. A mode switching device 2 is provided on the wire 4. The audio signal picked up by the microphone 3 is transmitted to the four-stage headphone plug 1 after passing through the wire 4 and the mode switching device 2, and then output to the back-end device through the four-stage headphone plug 1.

[0035] The mode switching device 2 is used to switch the mode of the microphone output interface, and there are three modes in total, namely: three-stage, four-stage national standard (OMTP), and four-stage international standard (CITA). In other words, the mode switching device 2 is used to switch the connection position of the microphone 3 and the ground at the four-stage headphone plug 1, so that the signal output position of the four-stage headphone plug 1 is compatible with the three-stage headphone socket, the four-stage national standard headphone socket, or the four-stage international standard headphone socket as the audio input interface.

[0036] The mode switching device 2 is composed of a mechanical gear switch, which is low in cost and easy to operate. The mode switching can be achieved by toggling the gear switch, which is very convenient to use.

[0037] Microphones using three-stage headphone plugs are divided into two types: those that support bias voltage and those that do not. The difference between the two is whether the ring is connected to the bias voltage. If the three-stage headphone socket end (i.e., the device) does not provide a bias voltage and the three-stage headphone plug end (i.e., the microphone) does not have a bias voltage, sound recording cannot be achieved. Therefore, in order to make the high-compatibility microphone applicable to situations where no bias voltage is provided, the mode switching device 2 is also provided with a battery 22 (see Figure 5 , Figure 6 ). When switched to the three-stage mode, that is, when the signal output position of the four-stage headphone plug 1 matches the three-stage headphone socket as the audio input interface, the battery 22 is connected to the four-stage headphone plug 1 to provide a bias voltage.

[0038] Figure 5 The circuit is shown in FIG. Figure 5 As shown, there are four three-position switches. From top to bottom, the four three-position switches are used to switch the connection position of the battery 22, the connection position of the microphone 3, and the connection position of the ground respectively. The four three-position switches are linked. The specific switching principle is as follows: 1. When the switch is switched to Figure 5 When the switch is in the upper position, the microphone 3 is connected to the first section of the four-section headphone plug 1, the third section and the fourth section of the four-section headphone plug 1 are grounded, and the battery 22 is connected to the first section of the four-section headphone plug 1 to provide a bias voltage. At this time, it works in the three-section mode; second, when the switch is switched to Figure 5When the switch is in the middle position, the microphone 3 is connected to the third section of the four-section headphone plug 1, the fourth section of the four-section headphone plug 1 is grounded, and the first and second sections of the four-section headphone plug 1 are suspended. At this time, it works in the four-section national standard; third, when the switch is switched to Figure 5 When in the lower position, the microphone 3 is connected to the 4th section of the four-section headphone plug 1, the 3rd section of the four-section headphone plug 1 is grounded, and the 1st section and the 2nd section of the four-section headphone plug 1 are suspended. At this time, it works in the four-section international standard.

[0039] Please refer to Figure 5-Figure 8 The switching element of the mode switching device 2 is composed of a universal double-pole three-speed toggle switch 21 and a metal sheet 24; the metal sheet 24 is installed on the operating handle 211 of the double-pole three-speed toggle switch 21, and cooperates with the contact electrode on the circuit board 23 to form a linkage switch 20 (see Figure 5 ). With this structure, the mode switching device 2 has a compact structure and is easy to be miniaturized.

[0040] Please refer to Figure 5 In the present embodiment, a universal double-pole three-position toggle switch 21 is used to switch the connection position of the battery 22 and the microphone 3 in the four-stage headphone plug 1, and a linkage switch 20 composed of a metal sheet 24 and a circuit board 23 switches the connection position of the four-stage headphone plug 1.

[0041] Please refer to Figure 7 The metal sheet 24 includes a base plate 241, a mounting hole 242 is provided in the middle of the base plate 241, and a sliding groove 243 is formed by bending one side of the base plate 241. Figure 6 , Figure 7 , Figure 8 The metal sheet 24 is installed on the operating handle 211 of the double-pole three-speed toggle switch 21 through the installation hole 242, and the slide groove 243 is slidably matched with the circuit board 23. In this way, on the one hand, the metal sheet 24 can slide smoothly, and on the other hand, the convex part at the bottom of the slot 243 cooperates with the contact electrode (gold finger) on the circuit board 23 to realize the switch function. The switch cap 25 on the operating handle 211 plays a role in fixing the metal sheet 24. The metal sheet 24 with the above structure has the characteristics of easy installation and high reliability.

[0042] It should be understood that if a miniaturized double-pole three-position toggle switch or a miniaturized four-pole three-position toggle switch is available, the switching element of the mode switching device 2 can also adopt two miniaturized double-pole three-position toggle switches, and connect their operating handles through a linkage plate; or a miniaturized four-pole three-position toggle switch can also be adopted.

[0043] Further references Figure 4The mode switching device 2 is further provided with a clip 26 for wearing, and a compartment cover 29 for opening and closing the battery compartment. The mode switching device 2 can be conveniently fixed on the wearer's clothes by the clip 26, and the battery 22 can be conveniently replaced.

[0044] Further references Figure 6 In this embodiment, the circuit board 23, the battery 22, and the clip 26 are assembled together by using a bracket 27, so that the assembly of the mode switching device 2 is more convenient. A decorative shell 28 is sleeved on the outer side of the bracket 27.

[0045] It should be understood that in some applications, the microphone 3 and the four-section headphone plug 1 can be integrated without being connected by wires, and the present invention is also applicable to these applications.

[0046] As another embodiment, the mode switching device 2 and the microphone 3 are connected via a connector, wherein the connector is preferably a connector consisting of an earphone socket and an earphone plug, so that the user's existing earphone can be used as a microphone and connected to the earphone socket on the mode switching device 2 to form a highly compatible microphone.

[0047] The present invention is described in detail above through specific embodiments, and these detailed descriptions are only limited to helping those skilled in the art understand the content of the present invention, and cannot be understood as limiting the scope of protection of the present invention. Various modifications, equivalent transformations, etc. made by those skilled in the art to the above scheme under the conception of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-compatibility microphone, comprising: Microphone (3); as well as A four-section headphone plug (1) for outputting the audio signal picked up by the microphone (3); The microphone is characterized in that: the microphone further comprises a mode switching device (2), the mode switching device (2) being connected between the microphone head (3) and the four-stage headphone plug (1) and being used for switching the connection position of the microphone head (3) and the ground on the four-stage headphone plug (1), so that the signal output position of the four-stage headphone plug (1) is compatible with a three-stage headphone socket, a four-stage national standard headphone socket or a four-stage international standard headphone socket serving as an audio input interface; The switching element of the mode switching device (2) is composed of a universal double-pole three-speed toggle switch (21) and a metal sheet (24); the metal sheet (24) is mounted on an operating handle (211) of the double-pole three-speed toggle switch (21) and cooperates with a contact electrode on a circuit board (23) to form a linkage switch (20) that is linked to the double-pole three-speed toggle switch (21); The metal sheet (24) comprises a base plate (241), a mounting hole (242) is provided in the middle of the base plate (241), a slide groove (243) is formed by bending one side of the base plate (241), the metal sheet (24) is assembled on the operating handle (211) of the double-pole three-speed toggle switch (21) through the mounting hole (242), and the slide groove (243) is slidably matched with the circuit board (23); The mode switching device (2) is arranged on a wire (4) between the microphone (3) and the four-stage headphone plug (1); or the mode switching device (2) and the microphone (3) are connected via a connector.

2. The high-compatibility microphone according to claim 1, characterized in that: The mode switching device (2) is also provided with a battery (22). When the signal output position of the four-stage headphone plug (1) matches the three-stage headphone socket as the audio input interface, the battery (22) is connected to the four-stage headphone plug (1) to provide a bias voltage.

3. The high-compatibility microphone according to claim 2, characterized in that: The mode switching device (2) is also provided with a clip (26) for wearing.

4. The high-compatibility microphone according to claim 2, characterized in that: The mode switching device (2) is also provided with a compartment cover (29) for opening and closing the battery compartment.

5. The high-compatibility microphone according to claim 3, characterized in that: The circuit board (23), the battery (22) and the clip (26) are combined together via a bracket (27).

6. The high-compatibility microphone according to claim 1, characterized in that: When the mode switching device (2) and the microphone (3) are connected via a connecting piece, the connecting piece is composed of an earphone socket and an earphone plug, and the microphone (3) is an earphone.

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