CN210576643U - Dual-channel audio plug and riveting type plug connecting piece thereof - Google Patents

Abstract

The utility model discloses a dual-track audio plug and riveting type plug connecting piece thereof, wherein the dual-track audio plug comprises an inserting core, a first expansion pipe, an inner pipe, a second expansion pipe, an outer pipe and a plug top cover, the inserting core, the first expansion pipe, the inner pipe, the second expansion pipe and the outer pipe are nested from inside to outside in sequence, the lower part of the inserting core is inserted into the plug top cover, the riveting type plug connecting piece comprises a first riveting sheet, a second riveting sheet, a third riveting sheet, an attachment strip, a first inserting part and a second inserting part, the first inserting part and the second inserting part in the current plug connecting piece are aligned with corresponding positions and are driven into the dual-track audio plug, then wires corresponding to a signal cold end, a signal grounding end and a signal hot end are respectively placed on the first riveting sheet, the second riveting sheet and the third riveting sheet, three riveting sheets are bent by a riveting connection method to enable the wires to be respectively compressed, the manual welding mode is avoided, the problem of poor welding spots is solved, and the processing efficiency is improved.

Description

Dual-channel audio plug and riveting type plug connecting piece thereof

Technical Field

The utility model relates to an audio plug field, in particular to dual track audio plug and riveting formula plug connection spare thereof.

Background

The isolation structure between inner core and the outer tube in traditional double track audio frequency plug injects the plastic through the injection molding machine usually and forms, and leave the solder joint that corresponds the signal hot junction in double track audio frequency plug one end, signal cold junction and earthing terminal, therefore the double track audio frequency plug of this kind of structure is in process of production, will lean on the staff to place the hardware (metalwork such as inner core and outer tube) in the plastic mould, the processing degree of difficulty is big, the accuracy requirement is higher, it is more to consume the worker, simultaneously, receive humidity during moulding plastics, the temperature, speed, factors influence such as pressure and time, produce easily that the inner core is partial, mould plastics the burr, the inhomogeneous problem of parting bead, lead to the defective rate higher, it is not stable enough.

On the other hand, the connection between the dual-channel audio plug with the welding spot and the cable is completed by welding, and the welding spot interval of the dual-channel audio plug is very small, so that the requirement on the proficiency of welding workers is very high, the problems of insufficient solder, short circuit, open circuit and the like are difficult to avoid, and meanwhile, the welding process needs to use soldering tin and can generate polluted gas in the machining process, so that the environment is unfavorable.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a binaural audio frequency plug and riveting formula male connection spare thereof, improve the inside fixed knot structure of plug, utilize prefabricated first expansion pipe and second expansion pipe to improve the yields, make it be adapted to automated processing to adopt riveting formula male connection spare processing, avoid the welding bad problem that appears easily under the welding process mode.

According to a first aspect of the present invention, a dual-channel audio plug is provided, which includes a ferrule, a first expansion tube, an inner tube, a second expansion tube, an outer tube and a plug top cover, wherein the first expansion tube and the second expansion tube are both hollow tubular structures, the upper portion of the first expansion tube includes a plurality of first expansion pieces disposed around the axis of the first expansion tube, the first expansion pieces surround a first hole with a smaller aperture than the inner diameter of the first expansion tube, the upper portion of the second expansion tube includes a plurality of second expansion pieces disposed around the axis of the second expansion tube, the second expansion pieces surround a second hole with a smaller aperture than the inner diameter of the second expansion tube, a supporting portion for holding the first expansion pieces is disposed on the side of the ferrule, the lower portion of the ferrule is inserted into the plug top cover, the upper portion of the ferrule penetrates out of the first expansion tube from bottom to top as a binding post, the inner tube cover is in the first expansion tube, the second expansion tube cover is in the inner tube, the outer tube cover is in the second expansion tube, a first insulation ring is formed between the inner tube and the first expansion tube at a certain distance, a second insulation ring is formed between the outer tube and the inner tube at a certain distance, the supporting part struts the first expansion sheet to enable the first expansion sheet to deform outwards, the inner tube struts the second expansion sheet to enable the second expansion sheet to deform outwards, the first expansion sheet is in a strut state, the second expansion sheet is in a strut state, and the space for extruding and fixing the wire and the inserting needle is formed between the inner walls of the outer tube.

The dual-channel-based audio plug at least has the following beneficial effects: aiming at the wiring structure of the dual-channel audio plug, two spaces for extruding and fixing wires or contact pins are constructed in the audio plug by utilizing the dual-expansion pipe, so that a signal hot end wire and a signal cold end wire can be directly fixed in the processing process, and the internal structure of the plug can be fixed; the embodiment of the utility model provides an utilize prefabricated expansion pipe to carry out the equipment of binaural audio frequency plug, saved the process of moulding plastics among the traditional manufacturing technology to structurally adapt to automated production, can utilize automated processing equipment to squeeze into the wire rod or contact pin and accomplish fixedly in the binaural audio frequency plug promptly, reduce the human cost, improved the production efficiency, the uniformity and the stability of binaural audio frequency plug greatly.

According to the utility model discloses an aspect a binaural audio frequency plug, the lock pin is still including being convenient for the lock pin passes the broken inclined plane of first punchhole, broken inclined plane sets up between supporting part and the terminal, the radius of terminal is less than the radius of lock pin, the sub-unit connection of terminal the broken inclined plane. The broken inclined plane utilizes the inclined plane to disperse the impact force of lock pin to first punchhole, and the structure of protecting first punchhole can not suffer destruction, improves the yields.

According to the utility model discloses a two channel audio plugs, the supporting part is for encircleing the annular groove of lock pin surface, the radius of supporting part is less than the radius of lock pin just is greater than the radius of first punchhole. After the terminal of lock pin dashes out the inflation piece, the upper portion of inflation piece can enter into the annular groove, and the annular groove is as a joint part, blocks the lock pin and makes it can not retreat and break away from the inflation piece.

According to the utility model discloses first aspect a binaural audio frequency plug, first inflation piece is including being used for the card to go into the joint portion of supporting part, joint portion follows the inboard of first inflation piece towards extend in the first inflation pipe. The shape of joint portion matches in the annular groove, therefore joint portion and annular groove both form one from two directions about all the structure of chucking lock pin.

According to the utility model discloses a binaural audio plug, first expansion pipe is including encircleing the first recess that the surface of first expansion pipe set up, first recess butt joint the lower part of first expansion piece, second expansion pipe is including encircleing the second recess that the surface of second expansion pipe set up, the butt joint of second recess the lower part of second expansion piece. The first groove and the second groove are used for reducing the force required by deformation of the first expansion sheet and the second expansion sheet, so that the force required in the machining process is reduced.

According to the utility model discloses a binaural audio plug, the outer wall of outer tube sinks through the punching press and forms the locating piece, the position of locating piece with the second recess is corresponding. The positioning block punched on the surface of the outer pipe is used for fixing the connection between the outer pipe and the second expansion pipe, and if the second groove is not formed, the second expansion pipe can be damaged due to the fact that the positioning block is directly punched.

According to the utility model discloses a binaural audio plug, first expansion pipe still includes the first protruding portion as first insulating ring, first protruding portion is followed first expansion pipe surface is outwards outstanding, the bottom and the plug top cap of inner tube are supported respectively and are pushed up the upper and lower both sides of first protruding portion, the second expansion pipe still includes the second protruding portion as the second insulating ring, the second protruding portion is followed second expansion pipe surface is outwards outstanding, the bottom and the inner tube of outer tube are supported respectively and are pushed up the upper and lower both sides of second protruding portion. The dual channel audio plug has two insulating rings, and the outer pipe and the inner pipe are separated by the lower protrusions of the first expansion pipe and the second expansion pipe, so that the use of an insulating part is reduced.

According to the utility model discloses a binaural audio plug, the lower part of first inflation pipe is provided with bears the weight of the bearing part of second inflation pipe, the bearing part is followed the surface of first inflation pipe is outstanding and is located the top of first protruding portion, the inner tube is including corresponding the step of bearing part, the step laminating bearing part. In order to keep the smoothness of the whole side surface of the audio plug, according to the structure of the first insulating ring and the second insulating ring, the first expansion pipe and the second expansion pipe form a layered structure by utilizing the bearing part and the step, so that the audio plug is attractive and easy to use.

According to a second aspect of the present invention, there is provided a riveting type plug connector suitable for any one of the above-mentioned dual-channel audio plugs, comprising a first riveting sheet, a second riveting sheet, a third riveting sheet, an attachment strip, and a first plugging portion and a second plugging portion for plugging into the dual-channel audio plug, one end of the first riveting sheet, one end of the second riveting sheet and one end of the third riveting sheet are connected to the attachment strip, the other end of the first riveting sheet is connected with the first plug-in part, the other end of the second riveting sheet is connected with the second plug-in part, the first inserting part and the second inserting part are respectively inserted into a space formed between the first expansion sheet and the inner wall of the inner pipe and a space formed between the second expansion sheet and the inner wall of the outer pipe, and the third riveting sheet is in butt joint with the binding post.

The riveting type plug connecting piece at least has the following beneficial effects: first riveting piece, second riveting piece and third riveting piece all are used for carrying out the riveting to the wire rod and process fixedly, avoid adopting manual welding line, have improved the accuracy of assembly, have solved the bad and welding pollution's of solder joint problem, in addition, because the connector assembly is continuous, consequently can realize pressing in succession in automated processing equipment, machining efficiency is very high.

According to the utility model discloses the second aspect riveting formula connector assembly, be provided with the locating hole that is used for automated processing on the attachment strip. And positioning the sensor for automatic processing to align, and helping the mechanical equipment to automatically process.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples;

FIG. 1 is a cross-sectional view of an integral connection structure of an embodiment of the present invention;

FIGS. 2-5 are perspective, plan, elevation and cross-sectional views, respectively, of a first expansion tube in accordance with an embodiment of the present invention;

FIGS. 6-9 are perspective, plan, elevation and cross-sectional views, respectively, of a second expansion tube in accordance with an embodiment of the present invention;

fig. 10-11 are perspective and front views, respectively, of a plug connector according to an embodiment of the present invention;

fig. 12 is an exploded schematic view of a binaural audio plug according to an embodiment of the present invention;

fig. 13 is a perspective view of the overall connection structure according to the embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the embodiment of the present invention, the description of the upper and lower parts is based on the reference coordinate in the drawings, and other top views and perspective views refer to the coordinate system.

Referring to fig. 1, 12 and 13, a first aspect of the embodiments of the present invention relates to a two-channel audio plug, including a ferrule 300, a first expansion tube 100, an inner tube 400, a second expansion tube 200, an outer tube 500 and a plug top cover 600, wherein the first expansion tube 100 and the second expansion tube 200 are both hollow tubular structures, an upper portion of the first expansion tube 100 includes a plurality of first expansion pieces 110 disposed around an axis of the first expansion tube 100, the first expansion pieces 110 surround a first eyelet 120 having a smaller aperture than an inner diameter of the first expansion tube 100, an upper portion of the second expansion tube 200 includes a plurality of second expansion pieces 210 disposed around an axis of the second expansion tube 200, the second expansion pieces 210 surround a second eyelet 220 having a smaller aperture than an inner diameter of the second expansion tube 200, a side surface of the ferrule 300 is provided with a support portion 310 for holding the first expansion pieces 110 to be spread apart, the lower part of the ferrule 300 is inserted into the plug top cover 600, the upper part of the ferrule 300 as a binding post 320 penetrates out of the first expansion tube 100 from bottom to top, the inner tube 400 is sleeved outside the first expansion tube 100, the second expansion tube 200 is sleeved outside the inner tube 400, the outer tube 500 is sleeved outside the second expansion tube 200, a first insulation ring is formed between the inner tube 400 and the first expansion tube 100 at a certain distance, a second insulation ring is formed between the outer tube 500 and the inner tube 400 at a certain distance, the first expansion sheet 110 is propped open by the support part 310 to enable the first expansion sheet 110 to deform outwards, the second expansion sheet 210 is propped open by the inner tube 400 to enable the second expansion sheet 210 to deform outwards, the first expansion sheet 110 is between the inner wall of the inner tube 400 in a propped-open state, and the second expansion sheet 210 is between the inner wall of the outer tube 500 in a propped-open state, spaces for fixing the wire and the pin by pressing are formed respectively.

In this embodiment, the ferrule 300, the first expansion tube 100, the inner tube 400, the second expansion tube 200 and the outer tube 500 are sequentially nested layer by layer to form the whole two-channel audio plug, wherein:

the connection structure between the ferrule 300 and the first expansion pipe 100 is specifically as follows: the ferrule 300 further includes a portion convenient for the ferrule 300 to pass through the burst inclined plane 330 of the first eyelet 120, the burst inclined plane 330 is disposed between the supporting portion 310 and the terminal 320, the radius of the terminal 320 is smaller than the radius of the ferrule 300, the lower portion of the terminal 320 is connected to the burst inclined plane 330, in addition, the supporting portion 310 is an annular groove surrounding the outer surface of the ferrule 300, the radius of the supporting portion 310 is smaller than the radius of the ferrule 300 and larger than the radius of the first eyelet 120, the first expansion piece 110 includes a clamping portion 130 for clamping the supporting portion 310, the clamping portion 130 is along the inner side surface of the first expansion piece 110 extends into the first expansion pipe 100, and by the above structure, when the ferrule 300 passes through the first expansion pipe 100 from bottom to top, the burst inclined plane 330 of the ferrule 300 disperses the impact force of the ferrule 300 on the first eyelet 120, when the first expansion piece 110 reaches the position of the support portion 310, since the support portion 310 is an annular groove and the clamping portion 130 is disposed corresponding to the support portion 310, the clamping portion 130 is clamped in the support portion 310, so that the ferrule 300 and the first expansion piece 110 form a vertical locking structure, and the ferrule 300 does not separate from the first expansion pipe 100. In the present embodiment, the radius of the ferrule 300 is the same as the inner diameter of the first expansion pipe 100, or the radius of the ferrule 300 is slightly larger than the inner diameter of the first expansion pipe 100 to form an interference fit, that is, the ferrule 300 is integrally and tightly coupled in the first expansion pipe 100.

The connection structure between the first expansion pipe 100 and the inner pipe 400 is specifically as follows: referring to fig. 2 to 5, the first expansion pipe 100 includes a first groove 140 disposed around an outer surface of the first expansion pipe 100, a first protrusion 150 as a first insulation ring, and a bearing 160 for bearing the second expansion pipe 200, the first groove 140 is abutted against a lower portion of the first expansion sheet 110, the first groove 140 reduces a thickness of a connection between the first expansion sheet 110 and the first expansion pipe 100 so that the insert core 300 easily supports the first expansion sheet 110, the first protrusion 150 protrudes outward along a surface of the first expansion pipe 100 and is disposed at a lower portion of the first expansion pipe 100, a bottom of the inner pipe 400 and a plug top cover 600 are abutted against upper and lower sides of the first protrusion 150, respectively, the bearing 160 is disposed at a lower portion of the first expansion pipe 100 and above the first protrusion 150, and accordingly, the inner pipe 400 includes a step 410 corresponding to the bearing 160, the step 410 is attached to the bearing part 160, and the cross section of the step 410 is in a right-angle shape. In this embodiment, the inner wall of the inner tube 400 is fitted to the first expansion tube 100, so that the inner tube 400 and the first expansion tube 100 are tightly coupled, and only a space for pressing and fixing the wire is left between the upper portion of the inner tube 400 and the first expansion sheet 110.

The connection structure between the inner pipe 400 and the second expansion pipe 200 is specifically as follows: referring to fig. 6 to 9, the second expansion pipe 200 further includes a second groove 230 disposed around the outer surface of the second expansion pipe 200, and a second protrusion 240 as a second insulation ring, the second groove 230 abutting against the lower portion of the second expansion sheet 210, the second protrusion 240 protruding outward along the surface of the second expansion pipe 200, the bottom of the second expansion pipe 200 being supported on the step 410 of the inner pipe 400, one side surface of the second protrusion 240 being flush with the bottom surface of the second expansion pipe 200 in this embodiment, the thickness of the second protrusion 240 being the same as the thickness of the step 410, and the second expansion pipe 200 abutting against the side surface of the inner pipe 400.

The connection structure between the second expansion pipe 200 and the outer pipe 500 is specifically as follows: the outer tube 500 is a cylindrical structure and is sleeved outside the second expansion tube 200, the bottom of the outer tube 500 is pressed against the second protrusion 240, the outer wall of the outer tube 500 is pressed and sunk by stamping to form a positioning block 510, and the position of the positioning block 510 corresponds to the second groove 230, so that the connection between the outer tube 500 and the second expansion sheet 210 can be locked.

Referring to fig. 10 and 11, a second aspect of the embodiments of the present invention relates to a plug connector suitable for the above-mentioned dual channel audio plug, including a first rivet sheet 1, a second rivet sheet 2, a third rivet sheet 3, an attachment strip 4, and a first insertion portion 5 and a second insertion portion 6 for inserting into the dual channel audio plug, wherein one end of the first rivet sheet 1, one end of the second rivet sheet 2, and one end of the third rivet sheet 3 are connected to the attachment strip 4, the other end of the first rivet sheet 1 is connected to the first insertion portion 5, the other end of the second rivet sheet 2 is connected to the second insertion portion 6, the first insertion portion 5 and the second insertion portion 6 are respectively inserted into a space formed between the first expansion sheet 110 and the inner wall of the inner tube 400 and a space formed between the second expansion sheet 210 and the inner wall of the outer tube 500, the third riveting sheet 3 is butted with the wiring terminal 320, wherein the attachment strip 4 is provided with a positioning hole 7 for automatic processing, and in this embodiment, the first inserting portion 5 and the second inserting portion 6 are both arc-shaped, and the radian thereof is matched with the radians of the outer tube 500 and the inner tube 400 in the binaural audio plug, so that the mechanical processing is facilitated, and meanwhile, in order to distinguish the wiring positions, the cambered surfaces of the first inserting portion 5 and the second inserting portion 6 are opposite.

In the automatic processing process, mechanical equipment is aligned by positioning, the first plug-in part 5 and the second plug-in part 6 in the current plug connecting piece are aligned to corresponding positions and are driven into the two-channel audio plug, the binding post 320 is placed into the third riveting sheet 3, then wires corresponding to the signal cold end, the grounding end and the signal hot end are respectively placed on the first riveting sheet 1, the second riveting sheet 2 and the third riveting sheet 3, the three riveting sheets are bent by a riveting wiring method to enable the three riveting sheets to respectively press the wires, thereby avoiding the adoption of manual welding connection, improving the assembly accuracy, solving the problems of poor welding points and welding pollution, and in addition, because the plug connecting pieces are connected in series, a chain-shaped plug flat cable is formed after the plug connecting pieces are assembled with the plug, so that continuous pressing can be realized in automatic processing equipment, and the processing efficiency is high.

The embodiment of the utility model provides an in first expansion pipe 100 and second expansion pipe 200 are prefabricated working of plastics, before getting into processing, select out bad two kinds of expansion pipe, two kinds of expansion pipe and lock pin 300 with the yields, outer tube 100 assembles into the binaural audio frequency plug, because first expansion pipe 100 and second expansion pipe 200 are the prefab, uniformity and stability are obviously superior to the gained structure of injection moulding, the yields of binaural audio frequency plug has been improved, and utilize the assembly of automatic processing equipment, the human cost can be greatly reduced, improve the production efficiency of binaural audio frequency plug, uniformity and stability.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (10)

1. A binaural audio plug, comprising: the expansion joint comprises an insertion core (300), a first expansion pipe (100), an inner pipe (400), a second expansion pipe (200), an outer pipe (500) and a plug top cover (600), wherein the first expansion pipe (100) and the second expansion pipe (200) are both of a hollow tubular structure, the upper part of the first expansion pipe (100) comprises a plurality of first expansion sheets (110) arranged around the axis of the first expansion pipe (100), the first expansion sheets (110) surround a first eyelet (120) with the aperture smaller than the inner diameter of the first expansion pipe (100), the upper part of the second expansion pipe (200) comprises a plurality of second expansion sheets (210) arranged around the axis of the second expansion pipe (200), the second expansion sheets (210) surround a second eyelet (220) with the aperture smaller than the inner diameter of the second expansion pipe (200), and a supporting part (310) used for keeping the first expansion sheets (110) to be expanded is arranged on the side surface of the insertion core (300), the lower part of lock pin (300) is inserted into plug top cover (600), the upper part of lock pin (300) is as terminal (320) from up wearing out down first inflation pipe (100), inner tube (400) cover is in outside first inflation pipe (100), second inflation pipe (200) cover is in outside inner tube (400), outer tube (500) cover is in outside second inflation pipe (200), be separated by one section distance between inner tube (400) and first inflation pipe (100) and form first insulating ring, be separated by one end distance between outer tube (500) and inner tube (400) and form second insulating ring, supporting part (310) prop open first inflation piece (110) make first inflation piece (110) outwards warp, inner tube (400) prop open second inflation piece (210) make second inflation piece (210) outwards warp, first inflation piece (110) under the state with between inner tube (400) inner wall, And spaces for fixing the wires and the insertion pins by extrusion are respectively formed between the second expansion sheets (210) and the inner wall of the outer tube (500) in an expanded state.

2. A binaural audio plug as claimed in claim 1, wherein: the ferrule (300) further comprises a breaking inclined plane (330) for facilitating the ferrule (300) to pass through the first hole (120), the breaking inclined plane (330) is arranged between the support part (310) and the terminal (320), the radius of the terminal (320) is smaller than that of the ferrule (300), and the lower part of the terminal (320) is connected with the breaking inclined plane (330).

3. A binaural audio plug as claimed in claim 1, wherein: the support (310) is an annular groove surrounding the outer surface of the ferrule (300), the support (310) having a radius smaller than the ferrule (300) and larger than the radius of the first bore (120).

4. A binaural audio plug as claimed in claim 3, wherein: the first expansion sheet (110) comprises a clamping portion (130) used for being clamped into the supporting portion (310), and the clamping portion (130) extends into the first expansion pipe (100) along the inner side face of the first expansion sheet (110).

5. A binaural audio plug as claimed in claim 1, wherein: the first expansion pipe (100) comprises a first groove (140) arranged around the outer surface of the first expansion pipe (100), the first groove (140) is butted against the lower part of the first expansion sheet (110), the second expansion pipe (200) comprises a second groove (230) arranged around the outer surface of the second expansion pipe (200), and the second groove (230) is butted against the lower part of the second expansion sheet (210).

6. The binaural audio plug as claimed in claim 5, wherein: the outer wall of the outer tube (500) is sunk by punching to form a positioning block (510), and the position of the positioning block (510) corresponds to the position of the second groove (230).

7. A binaural audio plug as claimed in claim 1, wherein: the first expansion pipe (100) further comprises a first protruding portion (150) serving as a first insulation ring, the first protruding portion (150) protrudes outwards along the surface of the first expansion pipe (100), the bottom of the inner pipe (400) and the plug top cover (600) abut against the upper side and the lower side of the first protruding portion (150) respectively, the second expansion pipe (200) further comprises a second protruding portion (240) serving as a second insulation ring, the second protruding portion (240) protrudes outwards along the surface of the second expansion pipe (200), and the bottom of the outer pipe (500) and the inner pipe (400) abut against the upper side and the lower side of the second protruding portion (240) respectively.

8. A binaural audio plug as claimed in claim 7, wherein: the lower part of the first expansion pipe (100) is provided with a bearing part (160) for bearing the second expansion pipe (200), the bearing part (160) protrudes along the outer surface of the first expansion pipe (100) and is positioned above the first protrusion part (150), the inner pipe (400) comprises a step (410) corresponding to the bearing part (160), and the step (410) is attached to the bearing part (160).

9. A rivet press type plug connector suitable for a binaural audio plug according to any one of claims 1 to 8, characterized in that: the dual-channel audio plug comprises a first riveting sheet (1), a second riveting sheet (2), a third riveting sheet (3), an attachment strip (4), a first inserting part (5) and a second inserting part (6), wherein the first inserting part and the second inserting part are used for being inserted into the dual-channel audio plug, one end of the first riveting sheet (1), one end of the second riveting sheet (2) and one end of the third riveting sheet (3) are connected onto the attachment strip (4), the other end of the first riveting sheet (1) is connected with the first inserting part (5), the other end of the second riveting sheet (2) is connected with the second inserting part (6), the first inserting part (5) and the second inserting part (6) are respectively inserted into a space formed between the first expansion sheet (110) and the inner wall of the inner pipe (400) and a space formed between the second expansion sheet (210) and the inner wall of the outer pipe (500), the third riveting sheet (3) is butted with the binding post (320).

10. The rivet press type plug connector according to claim 9, wherein: and the attachment strip (4) is provided with a positioning hole (7) for automatic processing.

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