A sink plate true timing anti-noise earphone jack

Abstract

The application provides a sink plate true timing anti-noise earphone jack, which is characterized in that: independent left channel, right channel, ground, microphone, detection and fixed terminal mounting grooves are arranged in the shell, and each mounting groove is communicated with a plug space, and each terminal is sequentially connected in contact with the earphone connector when the earphone connector is inserted, and the first limiting block at the front end of the shell is combined with the left channel terminal, the second limiting block at the rear of the shell is combined with the fixed terminal, and the fixed terminal is used for discharging static electricity of the shell, so that the true timing conduction of each signal terminal in the plugging process is realized, the noise problem caused by the contact sequence disorder is effectively avoided, the stability and reliability of terminal assembly are improved, the electrostatic protection capability is enhanced, and the clarity of audio transmission and the use safety are improved.

Description

Technical Field

[0001] This utility model belongs to the field of headphone connector technology, and more specifically, it relates to a recessed true timing anti-noise headphone jack. Background Technology

[0002] With the rapid development of portable electronic devices such as smartphones, tablets, and laptops, users have placed higher demands on the functionality, stability, and user experience of audio input / output interfaces. The 3.5mm headphone jack, as a widely used analog audio interface, remains in use in many devices due to its strong compatibility, low cost, and ease of use. However, in actual use, traditional headphone jacks generally suffer from the following technical problems: First, the noise generated upon insertion is a long-standing problem for users. This is mainly because the timing of contact between the signal contacts and the socket terminals is inconsistent during headphone plug insertion, leading to sudden changes in circuit levels or transient currents. These transients are then amplified by the audio amplifier, generating audible noise that severely affects the user experience, especially noticeable in high-fidelity audio equipment.

[0003] Secondly, unreasonable terminal structure design leads to poor contact or signal crosstalk. The terminals in existing headphone jacks mostly use a simple spring contact structure, which is prone to fatigue deformation after long-term insertion and removal, resulting in insufficient contact pressure. At the same time, the compact layout of various functional terminals and the lack of effective isolation can easily cause signal interference, affecting call quality and device identification accuracy.

[0004] In addition, insufficient electrostatic discharge (ESD) protection is also a significant safety hazard. In dry environments or during frequent plugging and unplugging, static charge can easily accumulate between the metal plug and socket due to friction. If this charge cannot be discharged in time, it may damage the internal audio chip, causing equipment damage or malfunction.

[0005] Furthermore, low assembly precision and loose structure are also common problems. Traditional socket terminal fixing methods mostly rely on welding or simple clips, lacking reliable mechanical limiting structures. In automated assembly or vibration environments, displacement is prone to occur, affecting product consistency and long-term reliability.

[0006] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a recessed true timing noise reduction headphone jack in order to achieve a more practical purpose. Utility Model Content

[0007] To address the aforementioned technical problems, this utility model provides a recessed true-time noise-canceling headphone jack to solve the problems mentioned above.

[0008] A recessed true-time noise-canceling headphone jack, including The housing includes an insertion space located inside the housing; the insertion space is configured as a circular groove structure; multiple pin slots are provided on both sides of the housing; multiple mounting spaces are provided at the bottom of the housing. Installation space includes Left channel terminal mounting slot, used to install the left channel terminal; Right channel terminal mounting slot, used to install the right channel terminal; Grounding terminal mounting slot, used for installing grounding terminals; Microphone terminal mounting slot for mounting microphone terminals; Detection terminal mounting slot, used for mounting detection terminals; Fixed terminal mounting slot, used for mounting fixed terminals; Multiple installation spaces and plug-in spaces are internally connected; Headphone jack; the headphone jack is inserted into the insertion space; the headphone jack includes a left channel contact, a right channel contact, a ground contact, and a microphone contact arranged sequentially from head to tail; the headphone jack sequentially contacts and connects to the terminals in the installation space; A frustum is provided at the front end of the housing; The front two ends of the housing are provided with first limiting blocks; the left channel terminal is fixed to the bottom of the housing by the first limiting blocks; A second limiting block is provided at the rear of the housing; the fixed terminal is fixed to the bottom of the housing by the second limiting block; the fixed terminal is used to discharge static electricity from the housing.

[0009] Furthermore, the left channel terminal mounting slot is located on the front side of the bottom of the housing; the bottom of the frustum is provided with a first opening; the left channel terminal mounting slot is connected to the insertion space through the first opening; The left channel terminal is integrally formed; the left channel terminal includes a first contact section that is bent upward in the middle; the left channel terminal has first limiting grooves that are bent upward on both sides; the first limiting grooves are snapped onto the first limiting block; the left channel terminal also has a left channel pin on the left side; the left channel pin is inserted into the pin groove located on the front left end.

[0010] Furthermore, the right channel terminal mounting slot is located behind the left channel terminal mounting slot; the right channel terminal mounting slot includes a first recessed slot; a first arc-shaped groove is provided at the front end of the first recessed slot; a second opening is provided on the first arc-shaped groove; the right channel terminal mounting slot is connected to the insertion space through the second opening; a first insertion slot is provided behind the first arc-shaped groove. The right channel terminal is integrally formed; the right channel terminal includes a second contact section with a bent front end; the second contact section is snapped into a first arc-shaped groove; a first insertion part is provided on the rear side of the second contact section; the first insertion part is inserted into a first insertion groove; a right channel pin is provided on the right end of the right channel terminal; the right channel pin is inserted into a pin groove on the front right end.

[0011] Furthermore, the grounding terminal mounting slot is located behind the right channel mounting slot; the grounding terminal mounting slot includes a second recessed slot; a second insertion slot is provided in the second recessed slot; a third opening is provided on the front side of the second insertion slot; the grounding terminal mounting slot communicates with the insertion space through the third opening; The grounding terminal is integrally formed; the grounding terminal includes a third contact section bent upwards; the third contact section is inserted into a second insertion slot; a grounding pin is bent upwards on the rear side of the grounding terminal; the grounding pin is inserted into a pin slot located on the rear side of the left channel pin.

[0012] Furthermore, a partition post is provided on the rear side of the housing; the partition post is located at the bottom of the insertion space; the partition post is used to separate the microphone terminal mounting slot and the detection terminal mounting slot; a third insertion slot is provided on one side of the partition post; a fourth opening is provided on the third insertion slot; the microphone terminal is connected to the insertion space through the fourth opening; A fourth insertion slot is provided on the other side of the partition column; a fifth opening is provided on the fourth insertion slot; the detection terminal is connected to the insertion space through the fifth opening; The microphone terminal is integrally bent; a microphone pin is provided at the tail of the microphone terminal; the microphone pin is located in the pin slot on the rear side; The detection terminals are provided in two sets, arranged in a parallel array; the detection terminals are provided with detection pins at their tails; the detection pins are located in the pin slots on the rear side.

[0013] Furthermore, the fixed terminal mounting slot is located at the bottom rear side of the housing; the fixed terminal mounting slot includes a third recessed slot; and the third recessed slot has snap-fit ​​slots at both ends. The fixed terminal is integrally bent and formed; the fixed terminal includes an upwardly bent snap-fit ​​key; the snap-fit ​​key is disposed in a snap-fit ​​groove; a fixed pin is also provided on one side of the fixed terminal; the fixed pin is inserted into a pin groove located in the middle; The fixed terminal is provided with a second limiting groove bent upward on the rear side; the second limiting groove is fastened to the second limiting block for limiting and fixing.

[0014] Furthermore, the fixed terminal is arranged parallel to the bottom of the housing.

[0015] Furthermore, the first sink groove is located inside the housing; the right channel terminal is located inside the housing.

[0016] Furthermore, the second sinking groove is located inside the housing; the grounding terminal is located inside the housing.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a recessed true-time noise-canceling headphone jack. By setting independent mounting slots for the left channel, right channel, ground, microphone, detection, and fixed terminals within the housing, and connecting each mounting slot to the insertion space, the headphone connector can sequentially contact and connect with each terminal when inserted. Combined with the limiting and fixing structure of the left channel terminal by the first limiting block at the front of the housing and the fixed terminal by the second limiting block at the rear, as well as the design of the fixed terminal for discharging static electricity from the housing, this invention not only achieves true-time conduction of each signal terminal during insertion and removal, effectively avoiding noise problems caused by disordered contact sequence, but also improves the stability and reliability of terminal assembly, enhances electrostatic protection capabilities, and improves the clarity of audio transmission and safety of use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a recessed plate true timing anti-noise headphone jack according to this utility model.

[0019] Figure 2 This is a schematic diagram of the bottom of this utility model.

[0020] Figure 3 This is a bottom view of the utility model.

[0021] Figure 4 This is a schematic diagram of the left channel.

[0022] Figure 5 This is a schematic diagram of the right channel terminal.

[0023] Figure 6 This is a schematic diagram of the grounding terminal.

[0024] Figure 7 This is a schematic diagram of the microphone terminals.

[0025] Figure 8 This is a schematic diagram of the detection terminals.

[0026] Figure 9 This is a schematic diagram of a fixed terminal.

[0027] Figure 10 This is a diagram of an earphone jack.

[0028] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Housing; 11. Insertion space; 12. Pin slot; 13. Frustum; 131. First opening; 14. First limiting member; 15. Second limiting member; 16. Separator; 161. Third insertion slot; 162. Fourth opening; 163. Fourth insertion slot; 164. Fifth opening; 2. Left channel terminal mounting slot; 21. Left channel terminal; 211. First contact section; 212. First limiting slot; 213. Left channel pin; 3. Right channel terminal mounting slot; 31. Right channel terminal; 311. Second contact section; 312. First insertion part; 313. Right channel pin; 32. First recessed groove; 33. First arc-shaped groove; 34. Second opening; 35. 1. Insertion slot; 4. Grounding terminal mounting slot; 41. Grounding terminal; 411. Third contact section; 412. Grounding pin; 42. Second recessed slot; 43. Second insertion slot; 44. Third opening; 5. Microphone terminal mounting slot; 51. Microphone terminal; 511. Microphone pin; 6. Detection terminal mounting slot; 61. Detection terminal; 611. Detection pin; 7. Fixed terminal mounting slot; 71. Fixed terminal; 711. Snap-fit ​​key; 712. Fixed pin; 713. Second limiting slot; 72. Third recessed slot; 73. Snap-fit ​​slot; 8. Headphone connector; 81. Left channel contact; 82. Right channel contact; 83. Grounding contact; 84. Microphone contact. Detailed Implementation

[0029] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but should not be used to limit the scope of this utility model.

[0030] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Example: As attached Figure 1 To be continued Figure 10 As shown: A recessed true-time noise-canceling headphone jack, including Housing 1; the housing 1 includes an insertion space 11 located inside the housing 1; the insertion space 11 is configured as a circular groove structure; multiple pin slots 12 are provided on both sides of the housing 1; multiple mounting spaces are provided at the bottom of the housing 1; The bottom of the housing features multiple pin slots and mounting space, allowing terminal pins to be directly inserted into the PCB board for recessed mounting. This structure not only makes the overall appearance more compact and reduces the device thickness, but also reduces external electromagnetic interference and improves signal transmission quality, making it suitable for portable electronic devices with high space and EMI requirements.

[0033] Installation space includes Left channel terminal mounting slot 2 is used to install left channel terminal 21; Right channel terminal mounting slot 3 is used to install right channel terminal 31; Grounding terminal mounting slot 4 is used to install grounding terminal 41; Microphone terminal mounting slot 5 is used to install microphone terminal 51; The detection terminal mounting slot 6 is used to install the detection terminal 61; Fixed terminal mounting slot 7 is used to install fixed terminal 71; Multiple installation spaces and plug-in spaces 11 are internally connected; Each terminal adopts a one-piece molded structure and is equipped with dedicated contact sections, pins, and limiting grooves. This design not only enhances the structural strength of the terminal itself, but also achieves stable and elastic contact with the contacts within the insertion space through a precise bending structure, reducing poor contact or loosening and improving the reliability of the electrical connection.

[0034] Headphone connector 8; the headphone connector 8 is inserted into the insertion space 11; the headphone connector 8 includes a left channel contact 81, a right channel contact 82, a ground contact 83 and a microphone contact 84 arranged sequentially from head to tail; the headphone connector 8 is sequentially connected to the terminals in the installation space. This invention, through the rational layout of the installation positions and contact structures of each terminal, ensures that each contact point makes contact and conducts in a preset "true timing" sequence during the insertion of the headphone connector, grounding first and then connecting the signal, thus avoiding popping and noise problems caused by sudden changes in level or signal disorder at the moment of insertion, and significantly improving the stability of audio playback and user experience.

[0035] A frustum 13 is provided at the front end of the housing 1; The front two ends of the housing 1 are provided with first limiting blocks; the left channel terminal 21 is fixed to the bottom of the housing 1 by the first limiting blocks; A second limiting block is provided at the rear of the housing 1; the fixed terminal 71 is fixed to the bottom of the housing 1 by the second limiting block; the fixed terminal 71 is used to discharge static electricity from the housing 1.

[0036] The left channel terminal mounting slot 2 is located on the front side of the bottom of the housing 1; the bottom of the frustum 13 is provided with a first opening 131; the left channel terminal mounting slot 2 is connected to the insertion space 11 through the first opening 131; The left channel terminal 21 is integrally formed; the left channel terminal 21 includes a first contact section 211 that is bent upward in the middle; the left channel terminal 21 has first limiting grooves 212 that are bent upward on both sides; the first limiting grooves 212 are snapped onto the first limiting block; the left channel terminal 21 also has a left channel pin 213 on the left side; the left channel pin 213 is inserted into the pin groove 12 located on the front left end.

[0037] The right channel terminal mounting slot 3 is located behind the left channel terminal mounting slot 2; the right channel terminal mounting slot 3 includes a first recessed slot 32; a first arc-shaped slot 33 is provided at the front end of the first recessed slot 32; a second opening 34 is provided on the first arc-shaped slot 33; the right channel terminal mounting slot 3 is connected to the insertion space 11 through the second opening 34; a first insertion slot 35 is provided behind the first arc-shaped slot 33. The right channel terminal 31 is integrally formed; the right channel terminal 31 includes a second contact section 311 with a bent front end; the second contact section 311 is snapped into a first arc-shaped groove 33; a first insertion part 312 is provided on the rear side of the second contact section 311; the first insertion part 312 is inserted into a first insertion slot 35; a right channel pin 313 is provided on the right end of the right channel terminal 31; the right channel pin 313 is inserted into a pin slot 12 on the front right end.

[0038] The grounding terminal mounting slot 4 is located behind the right channel mounting slot; the grounding terminal mounting slot 4 includes a second recessed slot 42; a second insertion slot 43 is provided in the second recessed slot 42; a third opening 44 is provided on the front side of the second insertion slot 43; the grounding terminal mounting slot 4 is connected to the insertion space 11 through the third opening 44. The grounding terminal 41 is integrally formed; the grounding terminal 41 includes a third contact section 411 that is bent upward; the third contact section 411 is inserted into the second insertion slot 43; the grounding terminal 41 has a grounding pin 412 that is bent upward on the rear side; the grounding pin 412 is inserted into the pin slot 12 located on the rear side of the left channel pin 213.

[0039] A partition post 16 is provided on the rear side of the housing 1; the partition post 16 is located at the bottom of the insertion space 11; the partition post 16 is used to separate the microphone terminal mounting slot 5 and the detection terminal mounting slot 6; a third insertion slot 161 is provided on one side of the partition post 16; a fourth opening 162 is provided on the third insertion slot 161; the microphone terminal 51 is connected to the insertion space 11 through the fourth opening 162; A fourth insertion slot 163 is provided on the other side of the partition column 16; a fifth opening 164 is provided on the fourth insertion slot 163; the detection terminal 61 is connected to the insertion space 11 through the fifth opening 164; The microphone terminal 51 is integrally bent; the microphone terminal 51 is provided with a microphone pin 511 at its tail; the microphone pin 511 is provided in the pin slot 12 on the rear side; The detection terminals 61 are provided in two sets, arranged in a parallel array; the detection terminals 61 are provided with detection pins 611 at their tails; the detection pins 611 are located in the pin slots 12 on the rear side.

[0040] The detection terminal 61 is configured with two sets of parallel array structure, which can realize accurate detection of the headphone insertion status and type identification, provide reliable control signals for the device, support functions such as automatic switching of audio output mode, and enhance intelligent interaction capabilities.

[0041] The fixed terminal mounting groove 7 is located at the bottom rear side of the housing 1; the fixed terminal mounting groove 7 includes a third recessed groove 72; the third recessed groove 72 is provided with snap-fit ​​grooves 73 at both ends; The fixed terminal 71 is integrally bent and formed; the fixed terminal 71 includes an upwardly bent snap-fit ​​key 711; the snap-fit ​​key 711 is disposed in the snap-fit ​​groove 73; a fixed pin 712 is also provided on one side of the fixed terminal 71; the fixed pin 712 is inserted into the pin groove 12 located in the middle; The fixed terminal 71 is provided with a second limiting groove 713 bent upward on the rear side; the second limiting groove 713 is fastened to the second limiting block for limiting and fixing.

[0042] The fixed terminal 71 is arranged parallel to the bottom of the housing 1.

[0043] The first sink trough 32 is located inside the housing 1; the right channel terminal 31 is located inside the housing 1.

[0044] The second sinking groove 42 is located inside the housing 1; the grounding terminal 41 is located inside the housing 1.

[0045] By setting a first limiting block, a second limiting block, and a snap-fit ​​groove 73 on the housing 1, the left channel terminal 21 is snapped and fixed by the first limiting groove 212, and the fixed terminal 71 is fixed by cooperating with the second limiting block through the second limiting groove 713, thus achieving dual limiting of the critical terminal. This design effectively prevents the terminal from shifting or deforming during assembly or use, ensuring the consistency and long-term stability of the product.

[0046] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A recessed true-time noise-canceling headphone jack, characterized in that: include Housing (1); the housing (1) includes an insertion space (11) located inside the housing (1); the insertion space (11) is configured as a circular groove structure; multiple pin slots (12) are provided on both sides of the housing (1); multiple mounting spaces are provided at the bottom of the housing (1); Installation space includes Left channel terminal mounting slot (2) is used to install left channel terminal (21); Right channel terminal mounting slot (3) is used to install right channel terminal (31); Grounding terminal mounting slot (4) is used to install grounding terminal (41); Microphone terminal mounting slot (5) is used to install microphone terminal (51); A detection terminal mounting slot (6) is used to install a detection terminal (61); Fixed terminal mounting slot (7) is used to install fixed terminal (71); Multiple installation spaces and plug-in spaces (11) are internally connected; Headphone connector (8); The headphone connector (8) is inserted into the insertion space (11); The headphone connector (8) includes a left channel contact (81), a right channel contact (82), a ground contact (83) and a microphone contact (84) arranged sequentially from head to tail; The headphone connector (8) is sequentially connected to the terminals in the installation space; The front end of the housing (1) is provided with a frustum (13); The front two ends of the housing (1) are provided with first limiting blocks; the left channel terminal (21) is fixed to the bottom of the housing (1) by the first limiting blocks; The housing (1) is provided with a second limiting block at the rear; the fixed terminal (71) is fixed to the bottom of the housing (1) by the second limiting block; the fixed terminal (71) is used to discharge static electricity from the housing (1).

2. The recessed true-time noise-canceling headphone jack as described in claim 1, characterized in that: The left channel terminal mounting slot (2) is located on the front side of the bottom of the housing (1); the bottom of the truncated cone (13) is provided with a first opening (131); the left channel terminal mounting slot (2) is connected to the insertion space (11) through the first opening (131); The left channel terminal (21) is integrally formed; the left channel terminal (21) includes a first contact section (211) that is bent upward in the middle; the left channel terminal (21) has a first limiting groove (212) that is bent upward on both sides; the first limiting groove (212) is snapped onto the first limiting block; the left channel terminal (21) also has a left channel pin (213) on the left side; the left channel pin (213) is inserted into the pin slot (12) located on the left front side.

3. The recessed true-time noise-canceling headphone jack as described in claim 1, characterized in that: The right channel terminal mounting slot (3) is located behind the left channel terminal mounting slot (2); the right channel terminal mounting slot (3) includes a first recessed slot (32); the front end of the first recessed slot (32) is provided with a first arc-shaped slot (33); the first arc-shaped slot (33) is provided with a second opening (34); the right channel terminal mounting slot (3) is connected to the insertion space (11) through the second opening (34); the rear side of the first arc-shaped slot (33) is provided with a first insertion slot (35); The right channel terminal (31) is integrally formed; the right channel terminal (31) includes a second contact section (311) with a bent front end; the second contact section (311) is snapped into the first arc groove (33); a first plug-in part (312) is provided on the rear side of the second contact section (311); the first plug-in part (312) is plugged into the first plug-in groove (35); a right channel pin (313) is provided on the right end of the right channel terminal (31); the right channel pin (313) is plugged into the pin groove (12) on the front right end.

4. The recessed true-time noise-canceling headphone jack as described in claim 1, characterized in that: The grounding terminal mounting slot (4) is located behind the right channel mounting slot; the grounding terminal mounting slot (4) includes a second recessed slot (42); a second insertion slot (43) is provided in the second recessed slot (42); a third opening (44) is provided on the front side of the second insertion slot (43); the grounding terminal mounting slot (4) is connected to the insertion space (11) through the third opening (44); The grounding terminal (41) is integrally formed; the grounding terminal (41) includes a third contact section (411) bent upward; the third contact section (411) is inserted into the second insertion slot (43); the grounding terminal (41) has a grounding pin (412) bent upward on the rear side; the grounding pin (412) is inserted into the pin slot (12) located on the rear side of the left channel pin (213).

5. A recessed true-time noise-canceling headphone jack as described in claim 1, characterized in that: A partition post (16) is provided on the rear side of the housing (1); the partition post (16) is located at the bottom of the insertion space (11); the partition post (16) is used to separate the microphone terminal mounting slot (5) and the detection terminal mounting slot (6); a third insertion slot (161) is provided on one side of the partition post (16); a fourth opening (162) is provided on the third insertion slot (161); the microphone terminal (51) is connected to the insertion space (11) through the fourth opening (162); A fourth insertion slot (163) is provided on the other side of the partition column (16); a fifth opening (164) is provided on the fourth insertion slot (163); the detection terminal (61) is connected to the insertion space (11) through the fifth opening (164); The microphone terminal (51) is integrally bent; a microphone pin (511) is provided at the tail of the microphone terminal (51); the microphone pin (511) is provided in the pin slot (12) on the rear side; The detection terminals (61) are provided in two sets, arranged in a parallel array; the detection terminals (61) are provided with detection pins (611) at the tail; the detection pins (611) are located in the pin slots (12) on the rear side.

6. A recessed true-time noise-canceling headphone jack as described in claim 1, characterized in that: The fixed terminal mounting groove (7) is located at the bottom rear side of the housing (1); the fixed terminal mounting groove (7) includes a third recessed groove (72); the third recessed groove (72) has snap-fit ​​grooves (73) at both ends; The fixed terminal (71) is integrally bent and formed; the fixed terminal (71) includes an upwardly bent snap-fit ​​key (711); the snap-fit ​​key (711) is disposed in the snap-fit ​​groove (73); a fixed pin (712) is also disposed on one side of the fixed terminal (71); the fixed pin (712) is inserted into the pin groove (12) located in the middle; The fixed terminal (71) is provided with a second limiting groove (713) bent upward on the rear side; the second limiting groove (713) is fastened to the second limiting block for limiting and fixing.

7. A recessed true-time noise-canceling headphone jack as described in claim 6, characterized in that: The fixed terminal (71) is arranged parallel to the bottom of the housing (1).

8. A recessed true-time noise-canceling headphone jack as described in claim 3, characterized in that: The first sink groove (32) is located inside the housing (1); the right channel terminal (31) is located inside the housing (1).

9. A recessed true-time noise-canceling headphone jack as described in claim 4, characterized in that: The second sinking groove (42) is located inside the housing (1); the grounding terminal (41) is located inside the housing (1).

Images