Noise reduction earphone

Abstract

The utility model discloses a noise reduction earphone, which comprises a shell, a feedback microphone circuit assembly and a loudspeaker, and is characterized in that the shell is provided with a mounting groove, and a feedback microphone is mounted on a first wall surface of the mounting groove; the circuit assembly comprises a circuit board and a mainboard, the circuit board is electrically connected with the feedback microphone, a part of the circuit board is arranged on the side wall surface of the mounting groove, and the part of the circuit board arranged on the side wall surface is provided with a conductive feed point; the loudspeaker comprises a basin stand, a conductive insert and a vibration sounding system, a part of the conductive insert is embedded into the basin stand, and the vibration sounding system is electrically connected with the conductive insert; one end of the conductive insert protrudes out of the outer side wall of the basin frame to form a conductive bulge; according to the utility model, the loudspeaker extends into the mounting groove along the direction towards the first wall surface, so that the feedback microphone is located in front of the vibration sounding system, and the conductive projection abuts against and is electrically connected with the conductive feed point. No extra welding conduction operation is needed, and circuit conduction is synchronously realized in the installation process of the loudspeaker, so that the assembly process is simplified, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to audio equipment technical field especially relates to a noise reduction earphone. BACKGROUND

[0002] The feedback microphone of the TWS hybrid noise reduction earphone needs to be placed in front of the loudspeaker, and then be led out from the side of the loudspeaker and connected to the mainboard. In addition, the loudspeaker of the TWS hybrid noise reduction earphone also needs to be connected to the mainboard. In the related art, a branch is usually led out from the circuit board, and the loudspeaker is welded to the branch of the circuit board through a welding column. This assembly method has the problems of complex assembly process and inconvenience for production. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the prior art. To this end, the utility model provides a noise reduction earphone, which can simplify the assembly process and improve the production efficiency.

[0004] The noise reduction earphone according to the first aspect of the utility model comprises a shell, a feedback microphone, a circuit assembly and a loudspeaker. The shell has a mounting groove. The inner wall of the mounting groove comprises a first wall surface and a side wall surface. The first wall surface is arranged opposite to the slot opening of the mounting groove. The side wall surface is connected to the edge of the first wall surface. The feedback microphone is arranged on the first wall surface. The circuit assembly comprises a circuit board and a mainboard which are electrically connected to each other. The circuit board is electrically connected to the feedback microphone. Part of the structure of the circuit board is arranged on the side wall surface. The part of the structure of the circuit board arranged on the side wall surface has a conductive feed point. The loudspeaker comprises a basket, a conductive insert and a vibration sound generating system. Part of the structure of the conductive insert is embedded in the basket. The vibration sound generating system is electrically connected to the conductive insert. One end of the conductive insert protrudes from the outer side wall of the basket to form a conductive protrusion. The loudspeaker is configured to stretch into the mounting groove in the direction towards the first wall surface, so that the feedback microphone is located on the front side of the vibration sound generating system, and the conductive protrusion is in contact with and electrically connected to the conductive feed point.

[0005] The noise reduction earphone according to the utility model embodiment has at least the following beneficial effects: the circuit board does not have a branch structure, which simplifies the design of the circuit board and reduces the manufacturing cost. When assembling the noise reduction earphone, the circuit board only needs to be led out from the side wall surface, without complex wiring or connection. During the process of installing the loudspeaker at the slot opening of the mounting groove, the conductive protrusion and the conductive feed point are simultaneously in contact and conduct electricity. That is, the utility model does not need to perform additional welding operation, and the installation process of the loudspeaker simultaneously realizes the circuit conduction, thereby simplifying the assembly process and improving the production efficiency.

[0006] According to some embodiments of the present application, the basin frame has a hollow portion; the conductive insert includes a main body portion and a columnar portion, the main body portion extends along the edge of the hollow portion, part of the structure of the main body portion is exposed to the basin frame, the vibration sound generating system is electrically connected with the part of the structure of the main body portion exposed to the basin frame; one end of the columnar portion is connected with the main body portion, and the other end of the columnar portion extends out of the outer side wall of the basin frame to form the conductive protrusion.

[0007] According to some embodiments of the present application, the conductive insert further includes a detaching prevention portion, the detaching prevention portion is connected with the main body portion to form an included angle structure, and the detaching prevention portion is embedded in the basin frame.

[0008] According to some embodiments of the present application, the main body portion includes a first segment and a second segment connected with each other, the detaching prevention portion is connected with the first segment, and the columnar portion is connected with the second segment; in the direction from the center of the basin frame to the outer side wall, the size of the first segment is greater than the size of the second segment, and at least one side of the first segment is exposed to the basin frame.

[0009] According to some embodiments of the present application, the basin frame is an injection molding part with the conductive insert as the insert.

[0010] According to some embodiments of the present application, the first wall surface is provided with a first limiting groove, the side wall surface is provided with a second limiting groove, the second limiting groove is in communication with the first limiting groove; and the circuit board is arranged in a bent manner along the path from the first limiting groove to the second limiting groove.

[0011] According to some embodiments of the present application, the circuit assembly further includes an elastic pad layer, the elastic pad layer is arranged in the second limiting groove, one side of the elastic pad layer facing the mounting groove is connected with the circuit board; and the conductive feed point is flush with or protrudes from the rest of the side wall surface except the second limiting groove.

[0012] According to some embodiments of the present application, the circuit board is provided with a positioning hole, the first wall surface is provided with a positioning column, and the positioning column passes through the positioning hole.

[0013] According to some embodiments of the present application, the mounting groove includes a first groove and a second groove in axial communication, the cross-sectional size of the first groove is greater than the cross-sectional size of the second groove to form a step portion at the communication position of the first groove and the second groove; the basin frame is supported on the step portion and limited in the first groove, and part of the structure of the vibration sound generating system extends into the second groove.

[0014] According to some embodiments of the present application, the outer side wall of the basin frame is provided with a limiting protrusion, the side wall of the first groove is provided with a third limiting groove, and the limiting protrusion is limited in the third limiting groove.

[0015] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0017] Figure 1 is a schematic view of the internal structure of the noise-reducing earphone in the embodiment of the present application;

[0018] Figure 2 is a schematic view of the cross-sectional structure of the noise-reducing earphone in the embodiment of the present application;

[0019] Figure 3 is a schematic view of the connection structure of the loudspeaker and the circuit board in the embodiment of the present application;

[0020] Figure 4 is a schematic view of the connection structure of the conductive insert and the pot frame in the embodiment of the present application; Figure 3

[0021] Figure 5 is a schematic view of the circuit principle of the noise-reducing earphone in the embodiment of the present application;

[0022] Figure 6 is a schematic view of the connection structure of the circuit board and the shell in the embodiment of the present application;

[0023] Figure 7 is a schematic view of the structure of the conductive insert in the embodiment of the present application;

[0024] Figure 8 is a schematic view of the connection structure of the circuit board and the shell in the embodiment of the present application;

[0025] Figure 9 is a schematic view of the disassembly structure of the noise-reducing earphone in the embodiment of the present application.

[0026] Reference signs:

[0027] 100, noise-reducing earphone;

[0028] 10, shell; 11, mounting groove; 111, first wall surface; 112, side wall surface; 113, first groove; 114, second groove; 115, step portion; 12, first limiting groove; 13, positioning column; 14, accommodating groove; 15, sound pickup hole; 16, second limiting groove; 17, third limiting groove;

[0029] 20, feedback microphone;

[0030] ​30, circuit assembly; 31, circuit board; 311, first sub-board; 312, second sub-board; 313, conductive feed point; 32, main board;

[0031] 40, horn; 41, stand; 411, limiting protrusion; 42, conductive insert; 421, conductive protrusion; 422, main body part; 4221, first section; 4222, second section; 423, columnar part; 424, anti-escape part; 43, vibration sound production system;

[0032] 51, elastic pad layer. DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0034] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation of the present application.

[0035] In the description of the present application, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. is understood as not including the number, above, below, etc. is understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0036] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application according to the specific content of the technical scheme.

[0037] In the description of the present utility model, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] In the first aspect, the noise reduction earphone according to the first aspect of the embodiment of the present utility model. As Figure 1 and Figure 2 shown, in some embodiments, the noise reduction earphone comprises a shell 10, a feedback microphone 20, a circuit assembly 30 and a loudspeaker 40.

[0039] As Figure 1 and Figure 2 shown, the shape of the noise reduction earphone 100 is formed by the shell 10, and the shell 10 is internally designed with a mounting groove 11 for mounting other components, and the shell 10 also protects other components mounted inside.

[0040] It should be noted that the mounting groove 11 only occupies a part of the internal space of the shell 10, and the mounting groove 11 can be used to position and install the feedback microphone 23 and the loudspeaker 40, and the mounting groove 11 can also install part of the structure of the circuit assembly 30.

[0041] The inner wall of the mounting groove 11 comprises a first wall surface 111 and a side wall surface 112, the first wall surface 111 is arranged opposite to the slot of the mounting groove 11, and the side wall surface 112 is connected with the edge of the first wall surface 111.

[0042] As Figure 1 , Figures 3 to 5 shown, the circuit assembly 30 comprises a circuit board 31 and a main board 32, the circuit board 31 is electrically connected with the main board 32, the circuit board 31 is connected with the feedback microphone 23, the feedback microphone 23 is used to capture external sound and feed back the sound signals to the main board 32 for processing, so as to realize the noise reduction function; other electrical components are arranged on the main board 32, so as to realize the processing of audio signals and the related control of the earphone.

[0043] The feedback microphone 23 is arranged in the first avoidance, so that when the loudspeaker 40 is installed in the mounting groove 11, the feedback microphone 23 can be located in front of the loudspeaker 40, which is convenient for capturing external sound.

[0044] Specifically, the main board 32 is located outside the mounting groove 11, and the circuit board 31 extends to outside the mounting groove 11 along the side wall surface 112 and is electrically connected with the main board 32. That is, part of the structure of the circuit board 31 is arranged on the side wall surface 112, and the part of the structure of the circuit board 31 arranged on the side wall surface 112 has the conductive feed point 313;

[0045] As shown in Figure 1 , Figure 2 and Figure 6 , the loudspeaker 40 includes a frame 41, a conductive insert 42 and a vibration sound production system 43. The frame 41 serves as a support structure of the loudspeaker 40. Part of the structure of the conductive insert 42 is embedded in the frame 41, so that the conductive insert 42 and the frame 41 form an integral structure. The vibration sound production system 43 can be stably fixed to the frame 41 and electrically connected with the part of the structure of the conductive insert 42 exposed from the frame 41. One end of the conductive insert 42 protrudes from the outer side wall of the frame 41 to form a conductive protrusion 421. The conductive protrusion 421 is used to abut against and electrically connect with the conductive feed point 313 when the loudspeaker 40 extends into the mounting groove 11 in the direction towards the first wall surface 111, so that the loudspeaker 40 is electrically connected to the main board 32 through the second sub-board 312.

[0046] The vibration sound production system 43 generally includes a magnetic circuit system and a vibration system. The magnetic circuit system includes a magnet and a voice coil, and the vibration system includes a transmission member and a diaphragm. A stable magnetic field is formed by the magnet, and a changing magnetic field is formed by the voice coil, so that the transmission member moves in a preset direction and drives the diaphragm to vibrate to achieve sound production. The above-mentioned vibration sound production system 43 is a conventional structure for sound production of the loudspeaker 40 in the art, and will not be described in detail herein. It should be noted that the loudspeaker 40 in the present application is different from the conventional loudspeaker 40 in that the conductive insert 42 is embedded in the frame 41, and the voice coil is electrically connected with the conductive insert 42 to form the conductive feed point 313.

[0047] In the present embodiment, since the conductive insert 42 and the frame 41 are embedded to form an integral structure, the conductive insert 42 is electrically connected with the voice coil of the vibration sound production system 43, and the conductive insert 42 forms a protruding conductive protrusion 421 on the outer side wall of the loudspeaker 40. The circuit board 31 does not have a branch structure, which simplifies the design of the circuit board 31 and reduces the manufacturing cost. When assembling the noise reduction earphone 100, only the circuit board 31 needs to be drawn out from the side wall surface 112, without complex wiring or connection. Then, the loudspeaker 40 can be installed at the slot opening of the mounting groove 11. Moreover, during the process of installing the loudspeaker 40 at the slot opening of the mounting groove 11, the contact and conduction of the conductive protrusion 421 and the conductive feed point 313 are also achieved. That is, in the present embodiment, the installation process of the loudspeaker 40 synchronously realizes the conduction of the circuit, thereby simplifying the assembly process and improving the production efficiency.

[0048] It should be noted that the side of the diaphragm of the vibration sound production system 43 is the front side of the loudspeaker 40, and the direction of the diaphragm of the vibration sound production system 43 is the front of the loudspeaker 40.

[0049] The loudspeaker 40 can be a square structure, a circular structure, or other regular or irregular shapes. The embodiment takes the loudspeaker 40 as a circular structure, and the basket 41 as a circular ring structure matched with the loudspeaker 40 as an example for description.

[0050] In the case of the basket 41 being a circular ring structure, the basket 41 has a hollow part.

[0051] In some embodiments, as shown in Figure 3 , Figure 6 and Figure 7 , the conductive insert 42 can include a main body part 422 and a columnar part 423. The main body part 422 extends along the edge of the hollow part by a certain distance to form an arc-like structure, which can better adapt to the shape and profile of the basket 41. The part of the main body is exposed to the circular ring surface at one end of the basket 41, so as to be in contact with the vibration sound production system 43 for conduction. And the arc-like structure of the main body part 422 can increase the embedding area of the conductive insert 42, and improve the connection stability of the conductive insert 42 and the basket 41.

[0052] One end of the columnar part 423 is connected to the main body part 422, and the other end protrudes out of the outer wall of the basket 41 to form a conductive protrusion 421. The columnar part 423 is connected to the outer wall of the main body part 422, and the columnar part 423 extends in a direction away from the center. Obviously, the extension direction of the columnar part 423 is different from the extension direction of the main body part 422, so that an included angle structure is formed between the columnar part 423 and the main body part 422. Since the conductive insert 42 is embedded in the basket 41, that is, part of the structure of the basket 41 is filled in the included angle structure, so as to limit the conductive insert 42. When the conductive protrusion 421 abuts against the conductive feed point 313, the conductive insert 42 will not be displaced or fall off.

[0053] The protruding size of the conductive protrusion 421 should not be too large, so as to avoid the deformation of the conductive protrusion 421 affecting the contact conduction between the conductive protrusion 421 and the conductive feed point 313. The protruding size of the conductive protrusion 421 can be 0.3mm, 0.4mm, etc.

[0054] Based on the above embodiments, as shown in Figure 6 and Figure 7As shown, the conductive insert 42 can further include a detaching prevention portion 424 connected with the main body portion 422 to form an angle structure, and the detaching prevention portion 424 is embedded in the basin frame 41. The detaching prevention portion 424 and the columnar portion 423 are both connected to the outer side wall of the main body portion 422, and the detaching prevention portion 424 and the columnar portion 423 are arranged at intervals. The detaching prevention portion 424 provides additional support and fixation for the conductive insert 42, further enhancing the stability of the connection between the conductive insert 42 and the basin frame 41, and effectively preventing the conductive insert 42 from falling off or shifting after installation.

[0055] Further, the main body portion 422 includes a first segment 4221 and a second segment 4222 connected with each other, the detaching prevention portion 424 is connected with the first segment 4221, and the columnar portion 423 is connected with the second segment 4222. In the direction of the center of the basin frame 41 pointing to the outer side wall, the size of the first segment 4221 is larger than that of the second segment 4222, that is, the radial size of the first segment 4221 is larger than that of the second segment 4222, and at least one side of the first segment 4221 is exposed to the circular surface of the basin frame 41. Due to the larger radial size of the first segment 4221 of the main body portion 422 and the exposure of at least one side to the basin frame 41, this design can absorb these installation errors to a certain extent. Even if there is a certain deviation between the position of the vibration sound production system 43 and the basin frame 41, the conductive insert 42 can still form good contact with the vibration sound production system 43, ensuring the reliability of the electrical connection.

[0056] In some embodiments, the number of conductive inserts 42 is two, and correspondingly, two conductive protrusions 421 are formed on the outer side wall of the basin frame 41. The two conductive inserts 42 are arranged symmetrically, that is, the ends of the two conductive inserts 42 close to each other are columnar portions 423, so that the spacing of the two conductive protrusions 421 is small, and the spacing of the parts of the two conductive inserts 42 used for electrical connection with the vibration sound production system 43 is large.

[0057] In some embodiments, as shown in Figure 6 and Figure 7 , the basin frame 41 is an injection molded part with the conductive insert 42 as the insert. Since the conductive insert 42 has been integrated with the basin frame 41, it is not necessary to separately install the conductive insert 42 during assembly, thereby simplifying the installation process. Moreover, the conductive insert 42 can also increase the overall strength of the basin frame 41.

[0058] The outer side wall of the basin frame 41 further has a limiting protrusion 411 for cooperating with a limiting structure on the shell 10 to limit the installation position of the loudspeaker 40, which is beneficial to the alignment of the contact points of the conductive protrusions 421 and the conductive feed points 313.

[0059] In some embodiments, as shown in Figure 2 , Figure 3 and Figure 4As shown, the circuit board 31 comprises a first sub-board 311 and a second sub-board 312 which are electrically connected to each other, the feedback microphone 23 is mounted on the first sub-board 311, and the feedback microphone 23 realizes the transmission of the sound signal through the first sub-board 311 and the second sub-board 312. The first sub-board 311 is connected to the first wall surface 111, so that when the loudspeaker 40 is mounted in the mounting groove 11, the feedback microphone 23 can be located in front of the loudspeaker 40, facilitating the capture of external sound. The second sub-board 312 is connected to the side wall surface 112, and the second sub-board 312 is electrically connected to the main board 32, that is, the second sub-board 312 passes from the outside of the loudspeaker 40 and is connected to the main board 32, realizing the electrical connection between the circuit board 31 and the main board 32.

[0060] As shown, the first sub-board 311 and the second sub-board 312 can be electrically connected to each other by wires, welding points and the like. Figure 2 and Figure 3 As shown, the circuit board 31 can also be an integral flexible circuit board 31, and the first sub-board 311 and the second sub-board 312 are different parts of the flexible circuit board 31, and there is no clear boundary, and they are only distinguished by the mounting position. Because the flexible circuit board 31 has good flexibility and conductivity, part of the flexible circuit board 31 can be mounted at the bottom of the mounting groove 11 and part of the flexible circuit board 31 can be mounted on the side wall surface 112 by bending the flexible circuit, thereby improving the stability and reliability of signal transmission.

[0061] The second sub-board 312 is provided with a conductive feed point 313, and the conductive protrusion 421 abuts against and is electrically connected to the conductive feed point 313, so as to connect the loudspeaker 40 to the main board 32. The conductive feed point 313 can be a copper foil, and the conductive protrusion 421 abuts against the copper foil; the copper foil can be formed on the second sub-board 312 by a copper plating process.

[0062] As shown in Figure 2 , Figure 8 and Figure 9 As shown, the first wall surface 111 is provided with a first limiting groove 12, and the side wall surface 112 is provided with a second limiting groove 16, the second limiting groove 16 is communicated with the first limiting groove 12, and the circuit board 31 is arranged in a bent manner along the path from the first limiting groove 12 to the second limiting groove 16. That is, the first sub-board 311 and the second sub-board 312 are arranged at an angle, the first sub-board 311 is arranged in the first limiting groove 12, and the second sub-board 312 is arranged in the second limiting groove 16. The first limiting groove 12 and the second limiting groove 16 jointly define the arrangement path of the circuit board 31.

[0063] The first wall surface 111 is provided with a positioning column 13, and the first sub-board 311 of the circuit board 31 has a positioning hole, the positioning column 13 passes through the positioning hole one by one, and the positioning column 13 and the positioning hole are matched to further improve the installation accuracy and position consistency of the feedback microphone 23.

[0064] As shown in Figure 2 and Figure 9 The first wall surface 111 also forms a receiving groove 14, and the feedback microphone 23 can be arranged in the receiving groove 14. It can be understood that the receiving groove 14 is used to provide installation space for the feedback microphone 23, and a sound pickup hole 15 is arranged on the shell 10 and communicates with the receiving groove 14, so that external sound can be transmitted to the feedback microphone 23 through the sound pickup hole 15.

[0065] The first limiting groove 12 can be recessed from the first wall surface 111 or surrounded by a stopping edge arranged on the first wall surface 111, and the present embodiment does not limit this.

[0066] In some embodiments, as shown in Figure 2 , Figure 8 and Figure 9 The circuit assembly 30 further includes an elastic pad layer 51, which is arranged in the second limiting groove 16. One side of the elastic pad layer 51 facing the installation groove 11 is connected with the second sub-circuit board 312 of the circuit board 31, and the conductive feed point 313 is flush with or protrudes from the rest of the side wall surface 112 outside the second limiting groove 16. When the circuit board 31 is a flexible circuit board 31, the first limiting groove 12 and the second limiting groove 16 define the bending path of the circuit board 31. And the second sub-circuit board 312 is installed in the second limiting groove 16 through the elastic pad layer 51.

[0067] Since the second sub-circuit board 312 is flush with or protrudes from the side wall surface 112, the conductive protrusion 421 protrudes from the outer side wall of the basin frame 41, so that the conductive protrusion 421 and the second sub-circuit board 312 have a certain overlap, so that the elastic pad layer 51 is compressed to provide an elastic support force for the second sub-circuit board 312, and the conductive protrusion 421 and the conductive feed point 313 are elastically resisted, thereby improving the stability of the electrical connection.

[0068] The elastic pad layer 51 is made of an insulating material, or the surface of the elastic pad layer 51 is coated with an insulating layer, so as to avoid interference with the circuit on the second sub-circuit board 312.

[0069] Specifically, the elastic pad layer 51 can be EVA (ethylene-vinyl acetate copolymer), and when the protruding size of the conductive protrusion 421 is 0.3 mm, the thickness of the elastic pad layer 51 can be 0.5 mm. That is, the thickness of the elastic pad layer 51 should be greater than the overlap of the conductive protrusion 421 and the second sub-circuit board 312, so as to provide sufficient compression space.

[0070] The elastic pad layer 51 can be connected with the wall surface of the second installation groove 11 and the second sub-circuit board 312 by pasting.

[0071] In other embodiments, when the protruding size of the conductive protrusion 421 is large enough, the conductive feed point 313 can also be recessed in the side wall surface 112.

[0072] In some embodiments, as shown in Figure 2 , Figure 8 and Figure 9 , the mounting groove 11 includes an axially communicating first groove 113 and a second groove 114, the cross-sectional size of the first groove 113 is larger than that of the second groove 114 to form a step portion 115 at the communication of the first groove 113 and the second groove 114; the step portion 115 faces the basket 41 so as to contact the supporting horn 40, the basket 41 is limited by the first groove 113 to prevent displacement or shaking of the basket 41 during installation, and the stability of the horn 40 after installation is improved. The part of the vibration sound generating system 43 protruding from the basket 41 is accommodated by the second groove 114, avoiding space waste or installation difficulty caused by the protrusion of the vibration sound generating system 43.

[0073] The space between the basket 41 and the step portion 115 can be filled with sealant to firmly fix the horn 40 on the step portion 115, preventing the basket 41 from loosening or displacing during installation or long-term use. The filling of the sealant can also reduce the gap between the basket 41 and the step portion 115, thereby improving the acoustic seal. This helps to reduce sound leakage and distortion, and improves the sound quality and performance of the noise reduction earphone 100.

[0074] As shown in Figure 2 and Figure 8 , the side wall of the first groove 113 is provided with a third limiting groove 17, and the limiting protrusion 411 is arranged in the third limiting groove 17. Through the cooperation of the limiting protrusion 411 and the third limiting groove 17, the rotation of the horn 40 is effectively limited, and then the conductive protrusion 421 can be accurately aligned with the conductive feed point 313.

[0075] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by ordinary skilled in the art without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A noise reducing earphone, characterized by, The shell has a mounting groove, an inner wall of the mounting groove comprising a first wall surface and a side wall surface, the first wall surface being arranged opposite to a slot opening of the mounting groove, and the side wall surface being connected with an edge of the first wall surface; The feedback microphone is arranged on the first wall surface; The circuit assembly comprises a circuit board and a main board which are electrically connected with each other, the circuit board being electrically connected with the feedback microphone, part of the structure of the circuit board being arranged on the side wall surface, and part of the structure of the circuit board arranged on the side wall surface having a conductive feed point; The loudspeaker comprises a basket, a conductive insert and a vibration sound production system, part of the structure of the conductive insert being embedded in the basket, the vibration sound production system being electrically connected with the conductive insert, and one end of the conductive insert protruding from an outer side wall of the basket to form a conductive protrusion; The loudspeaker is configured to extend into the mounting groove in a direction towards the first wall surface, so that the feedback microphone is located in front of the vibration sound production system, the conductive protrusion abuts against and is electrically connected with the conductive feed point. The basket has a hollow portion; the conductive insert comprises a main body portion and a columnar portion, the main body portion extending along an edge of the hollow portion, part of the structure of the main body portion being exposed from the basket, and the vibration sound production system being electrically connected with part of the structure of the main body portion exposed from the basket; one end of the columnar portion is connected with the main body portion, and the other end of the columnar portion protrudes from the outer side wall of the basket to form the conductive protrusion.

2. The noise reducing earphone of claim 1, wherein, The conductive insert further comprises a detaching prevention portion, the detaching prevention portion being connected with the main body portion to form an included angle structure, and the detaching prevention portion being embedded in the basket.

3. The noise reducing earphone of claim 2, wherein, The main body portion comprises a first segment and a second segment which are connected with each other, the detaching prevention portion being connected with the first segment, and the columnar portion being connected with the second segment; 4. The noise reducing earphone of claim 3, wherein In a direction along the center of the basket towards the outer side wall, the size of the first segment is greater than the size of the second segment, and at least one side of the first segment is exposed from the basket. The basket is an injection molding part with the conductive insert as an insert.

5. The noise reducing earphone of claim 1, wherein, The first wall surface is provided with a first limiting groove, the side wall surface is provided with a second limiting groove, the second limiting groove being in communication with the first limiting groove; the circuit board is arranged in a bent manner along a path from the first limiting groove to the second limiting groove.

6. The noise cancelling headphone of any one of claims 1 to 5, wherein, The circuit assembly further comprises an elastic pad layer, the elastic pad layer being arranged in the second limiting groove, and one side of the elastic pad layer towards the mounting groove being connected with the circuit board; 7. The noise reducing earphone of claim 6, wherein The conductive feed point is flush with or protrudes from the side wall surface except the second limiting groove. The circuit board is provided with a positioning hole, and the first wall surface is provided with a positioning column, the positioning column passing through the positioning hole.

8. The noise cancelling headphone of any one of claims 1 to 5, wherein, The mounting groove comprises a first groove and a second groove which are in axial communication, the cross-sectional size of the first groove being greater than the cross-sectional size of the second groove to form a step portion at the communication between the first groove and the second groove; the basket is supported on the step portion and is limited in the first groove, and part of the structure of the vibration sound production system extends into the second groove.

9. The noise reducing earphone of any one of claims 1 to 5, wherein, The outer side wall of the basket is provided with a limiting protrusion, and the side wall of the first groove is provided with a third limiting groove, the limiting protrusion being limited in the third limiting groove.

10. The noise reducing earphone of claim 9, wherein, ​

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