CN113285308B

CN113285308B - Earphone connector

Info

Publication number: CN113285308B
Application number: CN202110591938.5A
Authority: CN
Inventors: 胡启才
Original assignee: Singatron Electronic Zhongshan Co Ltd
Current assignee: Singatron Electronic Zhongshan Co Ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-07-12
Anticipated expiration: 2041-05-28
Also published as: CN113285308A

Abstract

The invention relates to the technical field of earphone insertion and discloses an earphone connector. The earphone connector comprises a plug and a socket, the plug comprises an insulating column, the insulating column is sequentially provided with a first stage, a second stage, a third stage and a fourth stage which are insulated from each other along the length direction, an annular boss is arranged on the insulating column, and the annular boss is positioned on one side of the fourth stage, which is far away from the third stage; the annular boss is provided with a fifth stage; a detection terminal, a microphone terminal, a left sound channel terminal, a right sound channel terminal and a grounding terminal are arranged in the socket; the plug is inserted in the socket, the first stage is connected with the detection terminal, and the detection terminal is used for judging whether the plug is inserted or not; the second stage is connected to the left channel terminal; the third stage is connected to the microphone terminal; the fourth stage is connected with the right sound channel terminal; the fifth stage is connected to the ground terminal. The grounding of the earphone connector is realized, and the plug can be applied to a socket of a four-level plug and a socket of a five-level plug, so that the universality of the plug is improved.

Description

Earphone connector

Technical Field

The invention relates to the technical field of earphone insertion, in particular to an earphone connector.

Background

At present, earphones are widely used in electronic equipment products in work and life. The kind of conventional earphone plug is the level four plug, and the level four plug includes first level, second level, third level and fourth level, and wherein, the first level is used for connecting and detects the terminal, detects whether earphone inserts, and the second level is used for connecting the microphone terminal, and third level and fourth level are used for connecting left sound channel terminal and right sound channel terminal, but the level four plug is not high to the prevention degree of the condition such as short circuit, produces the short circuit conducting phenomenon easily. Therefore, a five-stage plug is also designed in the prior art, namely, the ring-mounted metal sheet of the fourth stage is changed into two stages, and the fifth stage is used for connecting a grounding terminal.

Accordingly, there is a need for a headset connector that solves the above-mentioned problems.

Disclosure of Invention

Based on the above, the present invention is directed to provide an earphone connector, which achieves grounding of the earphone connector, and the plug can be applied to a socket of a four-stage plug and a socket of a five-stage plug, thereby improving the versatility of the plug.

In order to achieve the purpose, the invention adopts the following technical scheme:

a headset connector, comprising:

the plug comprises an insulating column, wherein a first stage, a second stage, a third stage and a fourth stage which are mutually insulated are sequentially arranged along the length direction of the insulating column, an annular boss is arranged on the insulating column, and the annular boss is positioned on one side of the fourth stage, which is far away from the third stage; a fifth stage is arranged on the annular boss;

the socket is internally provided with a detection terminal, a left sound channel terminal, a microphone terminal, a right sound channel terminal and a grounding terminal and is arranged on the electronic equipment;

the plug is inserted into the socket, the first stage is connected to the detection terminal, and the detection terminal is used for judging whether the plug is inserted or not; the second stage is connected to the left channel terminal; the third stage is connected to the microphone terminal; the fourth stage is connected to the right channel terminal; the fifth stage is connected to the ground terminal.

As a preferred technical scheme of the earphone connector, two planes are processed on the radial outer side wall of the annular boss, and the two planes are positioned on two sides of the annular boss and arranged in parallel;

the socket is provided with a mounting groove matched with the outer side wall of the annular boss in shape, and the annular boss can be inserted into the mounting groove.

As a preferred technical solution of the earphone connector, the socket further includes a grounding housing, a rubber core and a circuit board, the rubber core is provided with a cavity, the mounting groove is arranged on the rubber core, and the detecting terminal, the left channel terminal, the microphone terminal and the right channel terminal are all clamped in the cavity; the grounding terminal is arranged on the grounding shell, and the grounding shell is clamped on the outer side wall of the rubber core;

the detecting terminal, the left sound channel terminal, the microphone terminal, the right sound channel terminal and the grounding terminal are all welded on the circuit board.

As a preferred technical solution of the earphone connector, two of the planes are parallel to the circuit board.

As a preferred technical scheme of the earphone connector, a V-shaped avoiding opening is formed in the side wall of the mounting groove, and the grounding terminal is a first elastic sheet matched with the avoiding opening in shape;

when the annular boss is inserted in the mounting groove, the first elastic sheet is connected to the fifth stage through the avoiding opening.

As a preferred technical scheme of the earphone connector, one end of the annular boss, which is close to the first elastic sheet, is provided with a chamfer.

As a preferred technical solution of the earphone connector, the detecting terminal includes a first connecting piece and a second elastic piece welded to the circuit board;

when the plug is not inserted into the socket, the first connecting piece is connected to the second elastic piece;

when the plug is inserted into the socket, the first stage drives the second elastic sheet to separate from the first connecting sheet.

As a preferred technical scheme of the earphone connector, the first connecting sheet is a U-shaped connecting sheet, the bottom wall of the U-shaped connecting sheet is opposite to the end part of the plug, and the first stage can penetrate through the groove of the U-shaped connecting sheet;

one of two opposite side walls of the U-shaped connecting sheet is welded on the circuit board, and the other side wall can be lapped by the second elastic sheet.

As an optimal technical scheme of the earphone connector, an avoiding hole is formed in the bottom of the U-shaped connecting sheet, and an antifouling film is installed in the avoiding hole.

As a preferred technical solution of the earphone connector, the left channel terminal is a third elastic sheet, the microphone terminal includes a fourth elastic sheet and a second connecting sheet, and the right channel terminal is a fifth elastic sheet;

the third elastic sheet and the fifth elastic sheet are positioned on one side of the plug, the third elastic sheet and the fifth elastic sheet respectively correspond to the second stage and the fourth stage, and the fourth elastic sheet is positioned on the other side of the plug;

when the plug is not inserted into the socket, the second connecting sheet is connected to the fourth elastic sheet, and the electronic equipment is in the loudspeaker playing mode;

when the plug is inserted into the socket, the fourth elastic sheet is separated from the second connecting sheet, and the electronic device is in the earphone playing mode.

The invention has the beneficial effects that:

the invention provides an earphone connector which comprises a plug and a socket. The first-stage, second-stage, third-stage and fourth-stage structures of the plug are not changed, and when the plug is inserted into the socket, the first stage is connected with the detection terminal; the second stage is connected to the left channel terminal; the third stage is connected to the microphone terminal; the fourth level is connected in the right track terminal, makes this plug can be applicable to the socket of traditional four-level plug, and the commonality is high. Meanwhile, when the socket is applied to the socket, the annular boss is arranged on one side of the fourth stage, which is far away from the third stage, and the grounding terminal is connected through the fifth stage on the annular boss, so that the grounding of the earphone is realized, and the use safety of the earphone is improved. Moreover, when the plug is applied to the socket of the traditional four-level plug, the annular boss can prevent the plug from being excessively inserted, so that the socket is prevented from being damaged, and the service life of the earphone connector is prolonged.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a headset connector according to an embodiment of the present invention;

fig. 2 is an exploded view of the structure of a headset connector according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a rubber core provided in an embodiment of the present invention;

FIG. 4 is a schematic structural view of a plug according to an embodiment of the present invention during insertion;

fig. 5 is a schematic structural view of a plug according to an embodiment of the present invention when not inserted.

The figures are labeled as follows:

1. a plug; 11. an insulating column; 12. a first stage; 13. a second stage; 14. a third stage; 15. a fourth stage; 16. an annular boss; 161. a plane; 162. chamfering; 17. a fifth stage;

2. a socket; 21. a detection terminal; 211. a first connecting piece; 2111. avoiding holes; 212. a second elastic sheet; 2121. a first connection portion; 2122. a first barb; 22. a left channel terminal; 23. a microphone terminal; 231. a fourth spring plate; 2311. a second connecting portion; 2312. a second barb; 232. a second connecting sheet; 24. a right channel terminal; 25. a grounded housing; 251. a ground terminal; 26. a rubber core; 261. a cavity; 262. mounting grooves; 263. avoiding the mouth; 27. a circuit board.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 5, the present embodiment provides an earphone connector, which includes a plug 1 and a socket 2, where the plug 1 includes an insulating column 11, the insulating column 11 sequentially sets a first stage 12, a second stage 13, a third stage 14, and a fourth stage 15, which are insulated from each other, along a length direction, an annular boss 16 is disposed on the insulating column 11, and the annular boss 16 is located on a side of the fourth stage 15, which is far from the third stage 14; the annular boss 16 is provided with a fifth stage 17; a detection terminal 21, a left channel terminal 22, a microphone terminal 23, a right channel terminal 24 and a grounding terminal 251 are arranged in the socket 2; when the plug 1 is inserted into the socket 2, the first stage 12 is connected to the detection terminal 21; the second stage 13 is connected to the left channel terminal 22; the third stage 14 is connected to the microphone terminal 23; the fourth stage 15 is connected to the right channel terminal 24; the fifth stage 17 is connected to the ground terminal 251.

In this embodiment, the first-stage, second-stage, third-stage and fourth-stage structures of the plug in the prior art are not changed, and when the plug 1 is inserted into the socket of the fourth-stage plug, the first stage 12 is connected to the detection terminal 21; the second stage 13 is connected to the left channel terminal 22; the third stage 14 is connected to the microphone terminal 23; the fourth stage 15 is connected to the right channel terminal 24, so that the plug 1 can be applied to a socket of a conventional four-stage plug, and has high universality. Meanwhile, when the socket 2 of the embodiment is applied, the annular boss 16 is arranged on one side of the fourth stage 15, which is far away from the third stage 14, and the fifth stage 17 on the annular boss 16 is connected with the grounding terminal 251, so that the grounding of the earphone is realized, and the use safety of the earphone is improved. Moreover, when the plug 1 is applied to a socket of a traditional four-level plug, the annular boss 16 can prevent the plug 1 from being inserted too much, so that the socket of the four-level plug is damaged, and the service life of the earphone connector is prolonged.

In the prior art, the earphone plug and the socket can rotate relatively, errors exist in the cylindricity of the insulating column due to machining precision, when the plug rotates relatively to the socket, poor contact between the plug and the socket is easily caused, signal transmission is influenced, noise is generated, the tone quality is influenced, and when the earphone connector is serious, the damage to the earphone connector is easily caused. Preferably, in this embodiment, the annular boss 16 is provided with two planes 161 on the outer radial sidewall, and the two planes 161 are located on two sides of the annular boss 16 and are arranged in parallel; the socket 2 is provided with a mounting groove 262 matched with the shape of the outer side wall of the annular boss 16, and the annular boss 16 can be inserted into the mounting groove 262. After the annular boss 16 is inserted into the mounting groove 262, the plug 1 and the socket 2 can be prevented from rotating relatively due to the planes 161 arranged on the two sides of the annular boss 16, so that the quality of sound quality is improved, and the service life of the earphone connector is prolonged. In other embodiments, the outer side wall of the annular boss 16 may be machined with other limiting structures, such as a plane or a tooth shape, to limit the relative rotation between the plug 1 and the socket 2.

Preferably, as shown in fig. 2 and 3, the socket 2 further includes a grounding shell 25, a rubber core 26 and a circuit board 27, the rubber core 26 is provided with a cavity 261, and the mounting groove 262 is provided on the rubber core 26, since the mounting groove 262 needs to match the shape of the annular boss 16, and the mounting groove 262 is also provided with a corresponding plane 161 therein, which facilitates the processing of the mounting groove 262. The detection terminal 21, the left sound channel terminal 22, the microphone terminal 23 and the right sound channel terminal 24 are all clamped in the cavity 261, and the rubber core 26 realizes the insulation arrangement among the terminals; the grounding terminal 251 is arranged on the grounding shell 25, and the grounding shell 25 is clamped on the outer side wall of the rubber core 26; the detection terminal 21, the left channel terminal 22, the microphone terminal 23, the right channel terminal 24 and the ground terminal 251 are all soldered on the circuit board 27, so that the detection terminal 21, the left channel terminal 22, the microphone terminal 23, the right channel terminal 24 and the ground terminal 251 are electrically conductive and fixed on the circuit board 27. In other embodiments, the detection terminal 21, the left channel terminal 22, the microphone terminal 23, and the right channel terminal 24 may also be fixed in the cavity 261 by screws or by adhesion.

Further preferably, the two planes 161 are parallel to the circuit board 27, so that the thickness of the earphone connector in the direction perpendicular to the circuit board 27 can be reduced, the size of the earphone connector can be reduced, and the space arrangement can be facilitated.

It should be noted that a V-shaped avoiding opening 263 is formed in the side wall of the mounting groove 262, and the ground terminal 251 is a first elastic sheet matched with the avoiding opening 263 in shape; when the annular boss 16 is inserted into the mounting groove 262, the first elastic sheet is connected to the fifth stage 17 through the avoiding opening 263, so that the fifth stage 17 is connected to the grounding shell 25, and the grounding of the earphone connector is realized. Further preferably, one end of the annular boss 16 near the first spring plate is provided with a chamfer 162. In the process of inserting the plug 1, the chamfer 162 has a guiding effect on the first elastic sheet, so that the first elastic sheet is connected to the radial side wall of the annular boss 16, and the connection stability is improved.

Preferably, as shown in fig. 2, 4 and 5, the detecting terminal 21 includes a first connecting piece 211 and a second elastic piece 212 soldered to the circuit board 27; when the plug 1 is not inserted into the socket 2, the first connecting piece 211 is connected to the second elastic piece 212; when the plug 1 is inserted into the socket 2, the first stage 12 drives the second resilient piece 212 to disengage from the first connecting piece 211, and the detecting terminal 21 is used for determining whether the plug 1 is inserted.

Further, the first connecting sheet 211 is a U-shaped connecting sheet, the bottom wall of the U-shaped connecting sheet faces the end of the plug 1, and the first stage 12 can penetrate through the groove of the U-shaped connecting sheet; one of two opposite side walls of the U-shaped connecting sheet is welded on the circuit board 27 to realize the fixation of the U-shaped connecting sheet, and the other side wall can be overlapped by the second elastic sheet 212. Preferably, the bottom of the U-shaped connecting sheet is provided with an avoiding hole 2111, the avoiding hole 2111 can avoid the first stage 12, and the socket 2 is prevented from being damaged after the insertion amount of the first stage 12 is too large; an anti-fouling film is installed in the avoiding hole 2111 to prevent external impurities from entering the inside of the electronic device through the avoiding hole 2111.

In this embodiment, the second resilient plate 212 is bent toward the plug 1, the second resilient plate 212 is provided with a first connecting portion 2121, the first connecting portion 2121 is used for connecting the first stage 12, an end of the first connecting portion 2121 is provided with a first barb 2122, the first barb 2122 and the first connecting portion 2121 are located at two sides of the first connecting piece 211, when the plug 1 is not inserted, the first barb 2122 is connected to the first connecting piece 211, and after the plug 1 is inserted, the first stage 12 drives the first connecting portion 2121 to move in a direction away from the first stage 12, so that the first barb 2122 is separated from the first connecting piece 211, and whether the plug 1 is inserted is determined by a circuit.

In the prior art, the socket only comprises the detection switch, and when the detection switch detects that the plug is inserted, the circuit and the software convert the loudspeaker playing mode of the electronic equipment into the earphone playing mode. Preferably, in this embodiment, the left channel terminal 22 is a third elastic sheet, the microphone terminal 23 includes a fourth elastic sheet 231 and a second connecting sheet 232, and the right channel terminal 24 is a fifth elastic sheet; the third elastic sheet and the fifth elastic sheet are positioned on one side of the plug 1, the third elastic sheet and the fifth elastic sheet respectively correspond to the positions of the second stage 13 and the fourth stage 15, and the fourth elastic sheet 231 is positioned on the other side of the plug 1; when the plug 1 is not inserted into the socket 2, the second connecting piece 232 is connected to the fourth elastic piece 231, the electronic device is in a loudspeaker playing mode, when the plug 1 is inserted into the socket 2, the fourth elastic piece 231 is separated from the second connecting piece 232, and the electronic device is in an earphone playing mode. In this embodiment, a set of mechanical switches is added through the fourth elastic sheet 231 to realize the conversion between the speaker play mode and the earphone play mode of the electronic device, simplify the design difficulty of the product, reduce the types of electronic components, and reduce the cost.

Specifically, the fourth elastic piece 231 is provided with a second connection portion 2311, the second connection portion 2311 is used for connecting the third stage 14, the end portion of the second connection portion 2311 is provided with a second inverted hook 2312, the second inverted hook 2312 and the second connection portion 2311 are located on two sides of the second connection piece 232, when the plug 1 is not inserted, the second inverted hook 2312 is connected to the second connection piece 232 in an overlapping mode, and at this time, the electronic device is in a speaker playing mode; after the plug 1 is plugged, the third stage 14 drives the second connecting portion 2311 to move in a direction away from the third stage 14, so that the second inverse hook 2312 is separated from the second connecting piece 232, and at this time, the electronic device is in an earphone playing mode.

It should be noted that, in this embodiment, the first elastic sheet, the second elastic sheet 212, the third elastic sheet, the fourth elastic sheet 231 and the fifth elastic sheet are all bent toward the central axis direction of the plug 1, so that after the plug 1 is inserted, the connection stability is improved. When the plug 1 is not inserted into the socket 2, as shown in fig. 5, the second elastic piece 212 is connected to the first connecting piece 211, and at this time, it is determined that the earphone is not inserted through the circuit, and the fourth elastic piece 231 is connected to the second connecting piece 232, and at this time, the electronic device is in a speaker playing mode. After the plug 1 is inserted into the socket 2, as shown in fig. 4, the second elastic piece 212 abuts against the first stage 12 of the plug 1 and is separated from the first connecting piece 211, it is determined through circuit simulation that the earphone is inserted at this time, the fourth elastic piece 231 abuts against the third stage 14 of the plug 1 and is separated from the second connecting piece 232, at this time, the electronic device is converted from the speaker playing mode to the earphone playing mode, meanwhile, the third elastic piece is connected to the second stage 13 of the plug 1, the fifth elastic piece is connected to the fourth stage 15 of the plug 1, and the first elastic piece is connected to the fifth stage 17 of the plug 1, so that the application of the earphone on the electronic device is realized, and the earphone can work normally.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A headset connector, comprising:

the plug (1) comprises an insulating column (11), wherein a first stage (12), a second stage (13), a third stage (14) and a fourth stage (15) which are mutually insulated are sequentially arranged on the insulating column (11) along the length direction, an annular boss (16) is arranged on the insulating column (11), and the annular boss (16) is positioned on one side, far away from the third stage (14), of the fourth stage (15); a fifth stage (17) is arranged on the annular boss (16);

the microphone comprises a socket (2), wherein a detection terminal (21), a left sound channel terminal (22), a microphone terminal (23), a right sound channel terminal (24) and a grounding terminal (251) are arranged in the socket (2), and the socket (2) is arranged on electronic equipment;

the plug (1) is inserted into the socket (2), the first stage (12) is connected to the detection terminal (21), and the detection terminal (21) is used for judging whether the plug (1) is inserted or not; the second stage (13) is connected to the left channel terminal (22); the third stage (14) is connected to the microphone terminal (23); the fourth stage (15) is connected to the right channel terminal (24); the fifth stage (17) is connected to the ground terminal (251);

the outer side wall of the annular boss (16) in the radial direction is provided with two planes (161), and the two planes (161) are positioned on two sides of the annular boss (16) and arranged in parallel;

the socket (2) is provided with a mounting groove (262) matched with the outer side wall of the annular boss (16) in shape, and the annular boss (16) can be inserted into the mounting groove (262);

the socket (2) further comprises a grounding shell (25), a rubber core (26) and a circuit board (27), wherein the rubber core (26) is provided with a cavity (261), a mounting groove (262) is formed in the rubber core (26), and the detection terminal (21), the left sound channel terminal (22), the microphone terminal (23) and the right sound channel terminal (24) are clamped in the cavity (261); the grounding terminal (251) is arranged on the grounding shell (25), and the grounding shell (25) is clamped on the outer side wall of the rubber core (26);

the detection terminal (21), the left audio channel terminal (22), the microphone terminal (23), the right audio channel terminal (24) and the ground terminal (251) are all welded on the circuit board (27);

a V-shaped avoiding opening (263) is formed in the side wall of the mounting groove (262), and the grounding terminal (251) is a first elastic sheet matched with the avoiding opening (263) in shape;

when the annular boss (16) is inserted into the mounting groove (262), the first elastic sheet is connected to the fifth stage (17) through the avoiding opening (263).

2. The headset connector of claim 1, wherein the two planes (161) are parallel to the circuit board (27).

3. The earphone connector according to claim 1, wherein the annular boss (16) is provided with a chamfer (162) at an end adjacent to the first resilient tab.

4. The earphone connector according to claim 1, wherein the detection terminal (21) comprises a first connection piece (211) and a second elastic piece (212) welded to the circuit board (27);

when the plug (1) is not inserted into the socket (2), the first connecting piece (211) is connected to the second elastic piece (212);

when the plug (1) is inserted into the socket (2), the first stage (12) drives the second elastic sheet (212) to be separated from the first connecting sheet (211).

5. The earphone connector according to claim 4, wherein the first connecting piece (211) is a U-shaped connecting piece, the bottom wall of the U-shaped connecting piece faces the end of the plug (1), and the first stage (12) can be arranged in a groove of the U-shaped connecting piece in a penetrating mode;

one of two opposite side walls of the U-shaped connecting sheet is welded on the circuit board (27), and the other side wall can be overlapped by the second elastic sheet (212).

6. The headphone connector according to claim 5, wherein the bottom of the U-shaped connecting piece is provided with an avoiding hole (2111), and an antifouling film is installed in the avoiding hole (2111).

7. The headphone connector according to claim 1, wherein the left channel terminal (22) is a third elastic piece, the microphone terminal (23) includes a fourth elastic piece (231) and a second connecting piece (232), and the right channel terminal (24) is a fifth elastic piece;

the third elastic sheet and the fifth elastic sheet are positioned on one side of the plug (1), the third elastic sheet and the fifth elastic sheet respectively correspond to the positions of the second stage (13) and the fourth stage (15), and the fourth elastic sheet (231) is positioned on the other side of the plug (1);

when the plug (1) is not inserted into the socket (2), the second connecting sheet (232) is connected to the fourth elastic sheet (231), and the electronic equipment is in a loudspeaker playing mode;

when the plug (1) is inserted into the socket (2), the fourth elastic sheet (231) is separated from the second connecting sheet (232), and the electronic equipment is in an earphone playing mode.