Replaceable conversion structure for earphone cord audio plug
By designing a replaceable conversion structure, the problem of inconvenient replacement of headphone cable audio plugs is solved, enabling convenient switching between different headphone types and modular design, reducing replacement costs and minimizing electronic waste.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANNING HEAVY HAMMER TECH CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-04-17
AI Technical Summary
Existing headphone cable audio plugs are not convenient for replacing 0.78pin terminals and MMCX terminals, forcing users to prepare specific plugs for each type of headphone, increasing costs and reducing convenience.
A replaceable conversion structure was designed, which allows users to switch between a 0.78pin interface and an mmCX interface by connecting a locking ring and a copper socket. The structure includes a combination of a plug body, interface terminals, locking ring, fixing parts and wires to achieve the replacement of different terminal specifications.
It enables convenient switching between different headphone types, reduces replacement costs, conforms to the trend of modular design, reduces electronic waste, and improves ease of use and accessory versatility.
Smart Images

Figure CN224138482U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of audio equipment technology, specifically to a replaceable conversion structure for headphone cable audio plugs. Background Technology
[0002] An audio plug for headphone cables is an interface component used to connect headphones to audio equipment. It transmits electrical signals from the playback device to the headphones through physical contact, thereby enabling sound playback. Both 0.78-pin and MMCX connectors are types of headphone cable audio plugs. 0.78-pin connectors offer good mechanical connection stability and a degree of durability, making them suitable for frequent use. A significant feature of MMCX connectors is that they allow the headphone cable to rotate 360 degrees, which can reduce damage to the headphones caused by tangling or pulling.
[0003] Existing headphone cable audio plugs are inconvenient for replacing 0.78pin and MMCX terminals during use. If a user has multiple headphones using different types of terminals, they need to prepare specific plugs for each type of headphone. This not only increases costs but also reduces ease of use. Utility Model Content
[0004] The purpose of this invention is to provide a replaceable conversion structure for headphone cable audio plugs, which is convenient to use and solves the problem that existing headphone cable audio plugs are inconvenient to replace between 0.78pin and MMCX terminals during use. If a user has multiple headphones using different types of terminals, they need to prepare specific plugs for each type of headphone. This not only increases costs but also reduces the convenience of use.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a replaceable conversion structure for headphone cable audio plugs, comprising a plug body,
[0006] One end of the plug body is equipped with an interface terminal, and a locking ring is sleeved on the surface of the interface terminal, which is threadedly connected to the surface of the plug body;
[0007] The plug body includes a female socket, a fixing component is fixedly installed inside the female socket, one end of the fixing component is fixedly connected to an interface base, and a copper socket is fixedly installed inside the interface base.
[0008] The interface terminal includes a terminal body, one end of which is fixedly connected to a copper plug. The copper plug is inserted into a copper socket and electrically connected thereto. A retaining ring is provided on the surface of the terminal body.
[0009] The locking ring includes a ring body, the inner wall of which is threaded to the surface of the female seat, and a limiting hole is formed at one end of the ring body, which is movably sleeved on the surface of the retaining ring.
[0010] As a preferred embodiment of the replaceable conversion structure for headphone cable audio plugs of this utility model, the interface terminal is one of a long pin 0.78pin terminal, a short pin 0.78pin terminal, and an MMCX terminal.
[0011] As a preferred embodiment of the replaceable conversion structure for headphone cable audio plugs of this utility model, a wire is fixedly connected inside the fixing member, one end of the wire extends to the outside of the female socket, and the other end of the wire is electrically connected to the copper socket.
[0012] As a preferred embodiment of the replaceable conversion structure for headphone cable audio plugs of this utility model, the interface base is provided with a positioning groove, and one end of the terminal body is fixedly connected to a positioning pin, which is located inside the positioning groove and movably connected thereto.
[0013] As a preferred embodiment of the replaceable conversion structure for headphone cable audio plugs of this utility model, one end of the terminal body is movably connected to the surface of the interface base.
[0014] As a preferred embodiment of the replaceable conversion structure for headphone cable audio plugs of this utility model, the surface of the terminal body is movably connected to the inner wall of the ring.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] 1. This utility model replaces the 0.78pin interface terminal 2 with the MMCX interface terminal, making it compatible with different headphones. Users can easily switch between headphones using the 0.78pin interface and headphones using the MMCX interface without needing to equip each type of headphone with a separate cable. When the headphone cable is damaged, only the corresponding terminal part or the cable itself needs to be replaced, without having to buy a brand new headphone or a dedicated cable. This not only saves costs but also reduces electronic waste. This design is in line with the current trend of modular development of technology products, allowing users to customize products according to their specific needs, while also promoting the interchangeability and universality of accessories across models. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the present utility model. Figure 1 ;
[0018] Figure 2 This is a cross-sectional view of the present invention;
[0019] Figure 3 This is a schematic diagram of the structure of the present utility model. Figure 2 ;
[0020] Figure 4 This is a cross-sectional view of the plug body of this utility model;
[0021] Figure 5 This is a schematic diagram of the locking ring structure of this utility model;
[0022] Figure 6 This is a schematic diagram of the 0.78pin terminal structure of the long needle of this utility model;
[0023] Figure 7 This is a schematic diagram of the 0.78pin short pin terminal structure of this utility model;
[0024] Figure 8 This is a schematic diagram of the MMCX terminal structure of this utility model;
[0025] Figure 9 This is a schematic diagram of the 0.78pin interface earphone of this utility model;
[0026] Figure 10 This is a schematic diagram of the MMCX interface earphone of this utility model.
[0027] In the diagram: 1. Plug body; 2. Interface terminal; 3. Locking ring; 101. Female socket; 102. Fixing component; 103. Wire; 104. Positioning groove; 105. Copper socket; 106. Interface base; 201. Terminal body; 202. Copper plug; 203. Positioning pin; 204. Snap ring; 301. Ring body; 302. Limiting hole; 4. 0.78pin interface earphone; 5. MMCX interface earphone. Detailed Implementation
[0028] Please see Figures 1-10 A replaceable conversion structure for an audio plug for an earphone cable includes a plug body 1, an interface terminal 2 installed at one end of the plug body 1, a locking ring 3 sleeved on the surface of the interface terminal 2, and the locking ring 3 being threadedly connected to the surface of the plug body 1.
[0029] Furthermore, the plug body 1 includes a female socket 101, a fixing member 102 is fixedly installed inside the female socket 101, an interface base 106 is fixedly connected to one end of the fixing member 102, and a copper socket 105 is fixedly installed inside the interface base 106.
[0030] Furthermore, the interface terminal 2 includes a terminal body 201, one end of which is fixedly connected to a copper plug 202. The copper plug 202 is inserted into the copper socket 105 and electrically connected thereto. A retaining ring 204 is provided on the surface of the terminal body 201.
[0031] Furthermore, the locking ring 3 includes a ring body 301, the inner wall of the ring body 301 is threadedly connected to the surface of the female seat 101, and a limiting hole 302 is opened at one end of the ring body 301, the limiting hole 302 is movably sleeved on the surface of the retaining ring 204.
[0032] Furthermore, the interface terminal 2 is one of the following: a long pin 0.78pin terminal, a short pin 0.78pin terminal, and an MMCX terminal.
[0033] Furthermore, a wire 103 is fixedly connected inside the fastener 102. One end of the wire 103 extends to the outside of the female connector 101, and the other end of the wire 103 is electrically connected to the copper socket 105.
[0034] Furthermore, a positioning groove 104 is provided on the interface base 106, and a positioning pin 203 is fixedly connected to one end of the terminal body 201. The positioning pin 203 is located inside the positioning groove 104 and is movably connected to it.
[0035] Furthermore, one end of the terminal body 201 is movably connected to the surface of the interface base 106.
[0036] Furthermore, the surface of the terminal body 201 is movably connected to the inner wall of the ring body 301.
[0037] By replacing the 0.78pin connector 2 with the MMCX connector 2, different headphones can be adapted. Users can easily switch between headphones using the 0.78pin connector and headphones using the MMCX connector without needing to equip each type of headphone with a separate cable. When the headphone cable is damaged, only the corresponding connector part or the cable itself needs to be replaced, without having to buy a brand new headphone or a dedicated cable. This not only saves costs but also reduces electronic waste. This design is in line with the current trend of modular development of technology products, allowing users to customize products according to their specific needs, while also promoting the interchangeability and universality of accessories across models.
[0038] When using the 0.78pin interface headphone 4, install the 0.78pin interface terminal 2 onto the plug body 1 and lock the interface terminal 2 with the locking ring 3. When using the MMCX interface headphone 5, remove the 0.78pin interface terminal 2, install the MMCX interface terminal 2 onto the plug body 1, and lock the interface terminal 2 with the locking ring 3.
[0039] When replacing the interface terminal 2, first unscrew the ring 301 from the surface of the female base 101, and then remove the ring 301. At this time, the limiting hole 302 falls off the surface of the retaining ring 204, releasing the limitation on the terminal body 201. Then, remove the positioning pin 203 from the inside of the positioning groove 104, and remove the copper plug 202 from the inside of the copper socket 105, disconnecting the connection between the wire 103 and the terminal body 201. After the copper plug 202 and the positioning pin 203 are pulled out, the terminal body 201 separates from the interface base 106. At this time, the interface terminal 2 is removed. Then, replace it with another specification of interface terminal 2, insert the interface terminal 2 into the plug body 1, and continue to use the locking ring 3 to lock and fix the interface terminal 2.
[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A replaceable conversion structure for an audio plug on an earphone cable, comprising a plug body (1), characterized in that: One end of the plug body (1) is equipped with an interface terminal (2), and a locking ring (3) is sleeved on the surface of the interface terminal (2). The locking ring (3) is threadedly connected to the surface of the plug body (1). The plug body (1) includes a female socket (101), a fixing member (102) is fixedly installed inside the female socket (101), an interface base (106) is fixedly connected to one end of the fixing member (102), and a copper socket (105) is fixedly installed inside the interface base (106). The interface terminal (2) includes a terminal body (201), one end of which is fixedly connected to a copper plug (202). The copper plug (202) is inserted into the copper socket (105) and electrically connected thereto. A retaining ring (204) is provided on the surface of the terminal body (201). The locking ring (3) includes a ring body (301), the inner wall of the ring body (301) is threaded to the surface of the female seat (101), and a limiting hole (302) is opened at one end of the ring body (301), the limiting hole (302) is movably sleeved on the surface of the retaining ring (204).
2. A replaceable conversion structure for earphone cord audio plug as claimed in claim 1, wherein: The interface terminal (2) is one of the following: long pin 0.78pin terminal, short pin 0.78pin terminal and mmcx terminal.
3. A replaceable conversion structure for earphone cord audio plug as claimed in claim 1, wherein: The fixing member (102) has a wire (103) fixedly connected inside. One end of the wire (103) extends to the outside of the female seat (101), and the other end of the wire (103) is electrically connected to the copper socket (105).
4. A replaceable conversion structure for earphone cord audio plug as claimed in claim 1, wherein: The interface base (106) has a positioning groove (104), and a positioning pin (203) is fixedly connected to one end of the terminal body (201). The positioning pin (203) is located inside the positioning groove (104) and is movably connected to it.
5. The replaceable conversion structure for headphone cable audio plugs according to claim 1, characterized in that: One end of the terminal body (201) is movably connected to the surface of the interface base (106).
6. A replaceable conversion structure for earphone cord audio plug as claimed in claim 1, wherein: The surface of the terminal body (201) is movably connected to the inner wall of the ring (301).