WO2021114070A1

WO2021114070A1 - Earphone core and earphone

Info

Publication number: WO2021114070A1
Application number: PCT/CN2019/124243
Authority: WO
Inventors: 董献杰; 张龙
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2021-06-17

Abstract

Provided by the present application are an earphone core and an earphone. The earphone core comprises: a basin frame, a vibration system, and a magnetic circuit system. The basin frame comprises a main body part fixedly connected to the vibration system and an extension part that is bent and stretched from the main body part toward the vibration system. The magnetic circuit system comprises a magnetic bowl fixed on the extension part. The vibration system comprises a diaphragm fixed on the main body part and a voice coil fixed on the side of the diaphragm close to the magnetic circuit system. The earphone core further comprises a flexible circuit board electrically connected to the voice coil. The flexible circuit board comprises a first fixing part fixed to the voice coil, a second fixing part fixed to the basin frame, and a pad part formed extending from the first fixing part to the second fixing part. The orthographic projection of the pad part along the vibration direction of the diaphragm at least partially overlaps with the extension part. The extension part is provided with a welding gap corresponding to the pad part. The present technical solution solves the problems in the prior art in which the outer shape of the magnetic circuit needs to shrink in order to meet a spot welding space, and thus the magnetic circuit system cannot be maximized and the earphone performance is reduced.

Description

Earphone core and earphone

Technical field

The utility model relates to the technical field of electroacoustic energy conversion, in particular to an earphone core and earphones.

Background technique

In recent years, with the rapid development of mobile communication technology, consumers are increasingly using mobile communication devices with voice functions, and earphones have become one of the indispensable audio-visual equipment in people’s daily activities and work. People not only require Its appearance is small and exquisite, easy to wear, and it is required to have good sound quality and three-dimensional effect. In the prior art, due to the setting of a retaining wall on the outer ring of the magnetic bowl, the shape of the magnetic circuit needs to be retracted under the premise that the spot welding head can be extended, which will cause the size of the magnetic circuit system to be unable to be maximized, resulting in performance reduce.

Therefore, it is necessary to provide a headphone core.

technical problem

The purpose of the utility model is to provide an earphone core and earphones, so as to solve the problem that the magnetic circuit shape needs to be retracted in order to satisfy the spot welding space in the prior art, and the magnetic circuit system cannot be maximized and the earphone performance is reduced.

Technical solutions

The technical scheme of the utility model is as follows:

A headphone core includes: a basin frame with a containing space, a vibration system contained in the containing space, and a magnetic circuit system for driving the vibration system to emit sound; the basin frame includes a fixed connection with the vibration system The main body part and the extension part bent and extended from the main part toward the vibration system, the magnetic circuit system includes a magnetic bowl held on the extension part, and the vibration system includes a magnetic bowl held on the main part The diaphragm and the voice coil fixed on the side of the diaphragm close to the magnetic circuit system, the earphone core also includes a flexible circuit board electrically connected to the voice coil, and the flexible circuit board includes the voice coil A fixed first fixing portion, a second fixing portion fixed to the basin frame, and a land portion extending from the first fixing portion toward the second fixing portion, the land portion being along the diaphragm The orthographic projection of the vibration direction at least partially overlaps the extension portion, and the extension portion is provided with a welding notch corresponding to the pad portion.

Further, the basin frame further includes a retaining wall extending from a side of the extension portion away from the diaphragm in a direction away from the diaphragm, and the retaining wall surrounds the magnetic bowl and is spaced apart from the magnetic bowl. , The retaining wall is provided with an avoidance notch corresponding to the welding notch.

Further, the earphone core further includes a breathable damping member for covering the avoidance gap.

Further, the extension portion further includes a leakage hole provided on a side of the extension portion away from the magnetic bowl, and the breathable damping member includes a first cover portion for covering the leakage hole and a first covering portion for covering the leakage hole. The second covering portion of the avoiding gap, the second covering portion extends from the first covering portion to the avoiding gap to cover the welding gap.

Further, the bottom surface of the avoidance notch is flush with the surface of the extension part.

Further, the peripheral wall of the magnetic bowl is provided with a positioning groove, and the extension portion extends toward the magnetic bowl to form a positioning boss that matches the positioning groove, and the positioning boss is separately provided on two sides of the avoiding notch. side.

Further, the peripheral side surface of the positioning boss is in contact with the inner wall surface of the avoiding notch.

Further, the upper surface of the positioning boss is higher than the bottom surface of the groove of the avoiding notch, and the bottom surface of the avoiding notch is perpendicular to the peripheral side of the positioning boss.

Further, the welding notch is arranged in a U-shaped structure, and the symmetry axis of the welding notch coincides with the symmetry axis of the land portion.

Further, a headset includes the aforementioned headset core.

Beneficial effect

The beneficial effect of the utility model is that the projection of the pad portion along the vibration direction of the diaphragm at least partially overlaps with the extension portion, and the spot welding space is increased by opening a welding gap corresponding to the pad portion in the extension portion to solve the spot welding space. The problem of insufficient, so as to ensure that the spot welding head can reach in and perform spot welding on the pad part. By using this technical solution, while ensuring sufficient spot welding space, on the one hand, the protective magnetic circuit system can be fixed by the extension part, and on the other hand, the size of the magnetic circuit system can be maximized to ensure the audio performance of the earphone. The use of this technical solution solves the problem that the shape of the magnetic circuit in the prior art needs to be retracted in order to meet the spot welding space, and the problem that the magnetic circuit system cannot be maximized and the performance of the earphone is reduced.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of an earphone core in an embodiment of the utility model;

Fig. 2 is a schematic diagram of an exploded structure of Fig. 1;

Figure 3 is a schematic diagram of the structure of the basin frame;

Figure 4 is a schematic diagram of the structure of a flexible circuit board;

Fig. 5 is a cross-sectional view in the direction of A-A in Fig. 1;

Fig. 6 is a partial enlarged view of B in Fig. 5.

Embodiments of the present invention

It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present utility model will be described in detail with reference to the drawings and the embodiments.

It should be pointed out that the following detailed descriptions are all illustrative and are intended to provide further explanations for the application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

It should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and/or "including" are used in this specification, they indicate There are features, steps, operations, devices, components, and/or combinations thereof.

The present utility model will be further explained below in conjunction with the drawings and embodiments.

Referring to Figures 1 to 6, an earphone core includes: a basin frame 10 with a receiving space 10a, a vibration system 30 accommodated in the receiving space 10a, and a magnetic circuit system 20 for driving the vibration system 30 to produce sound; the basin frame 10 It includes a main body portion 11 fixedly connected to the vibration system 30 and an extension portion 12 bent and extended from the main body portion 11 toward the vibration system 30; the magnetic circuit system 20 includes a magnetic bowl 21 fixed on the extension portion 12, and the vibration system 30 includes The diaphragm 31 on the main body 11 and the voice coil 32 fixed on the diaphragm 31 close to the magnetic circuit system 20. The earphone core also includes a flexible circuit board 50. The flexible circuit board 50 includes a first fixing portion 51 fixed to the voice coil 32 , The second fixing portion 52 fixed to the basin frame 10 and the land portion 53 extending from the first fixing portion 51 toward the second fixing portion 52, and the orthographic projection of the land portion 53 along the vibration direction of the diaphragm 31 is at least partially and extended The portions 12 overlap, and the extension portion 12 is provided with a welding notch 121 corresponding to the land portion 53.

In the present technical solution, the projection of the pad portion 53 along the vibration direction of the diaphragm 31 at least partially overlaps the extension portion 12. The extension portion 12 is provided with a welding notch 121 corresponding to the pad portion 53 to increase the spot welding space. Solve the problem of insufficient spot welding space, so as to ensure that the spot welding head can reach in and perform spot welding on the land portion 53. By using this technical solution, while ensuring sufficient spot welding space, on the one hand, the protective magnetic circuit system 20 can be fixed through the extension 12, and on the other hand, the size of the magnetic circuit system 20 can be maximized to ensure the audio performance of the headset. . That is to say, the use of this technical solution solves the problem that the magnetic circuit shape in the prior art needs to be retracted to meet the spot welding space, and then the problem that the magnetic circuit system 20 cannot be maximized and the performance of the earphone is reduced.

3, the basin frame 10 further includes a retaining wall 13 extending from the side of the extension portion 12 away from the diaphragm 31 in a direction away from the diaphragm 31. The retaining wall 13 surrounds the magnetic bowl 21 and is spaced apart from the magnetic bowl 21, on the retaining wall 13 An avoidance notch 131 corresponding to the welding notch 121 is provided. By opening the avoidance notch 131 corresponding to the welding notch 121 in the retaining wall 13, sufficient space is provided for the external operation of the spot welding.

Preferably, the earphone core further includes a breathable damping member 40 for covering the avoidance gap 121 to ensure the normal operation of the earphone core and its acoustic performance.

Further, the extension portion 12 further includes a leakage hole 122 provided on the side of the extension portion 12 away from the magnetic bowl 21, and the air-permeable damping member 40 includes a first cover portion 41 for covering the leakage hole 122 and a first cover portion 41 for covering the avoidance gap 131 The second covering portion 42 extends from the first covering portion 41 to the avoiding notch 131 to cover the welding notch 121, see FIG. 6 for details. In this embodiment, the extension portion 12 is provided with a leakage hole 122, the leakage hole 122 plays a role in maintaining the air pressure balance inside and outside the sound cavity of the earphone core, and the breathable damping member 40 includes a first cover for covering the leakage hole 122 The joint 41 and the second cover 42 for covering the welding notch 121 are used to ensure the acoustic performance of the speaker.

Preferably, the bottom surface of the avoidance notch 131 is flush with the surface of the extension portion 12, so as not only to reduce the material of the breathable damping member 40, but also to ensure the cooperation of the second covering portion 41 with the welding notch 121.

2 and 3, the magnetic circuit system 20 includes a magnetic bowl 21 and a magnet assembly 22. The magnet assembly 22 includes a first magnetic steel 221, a pole core 223, and a second magnetic steel 222 that are sequentially housed in the magnetic bowl 21; The peripheral wall of 21 is provided with a positioning groove 211, and the extension 12 extends toward the magnetic bowl 21 to form a positioning boss 123 that matches with the positioning groove 211. The magnetic bowl 21 is clamped on the positioning boss 123 through the positioning groove 211 to realize the entire magnetic circuit system. 20 and the fixing of the basin frame 10. The positioning bosses 123 are separately provided on both sides of the welding notch 121 to preliminarily limit the operating range of spot welding. Preferably, the peripheral side surface of the positioning boss 123 is connected to the inner wall surface of the welding notch 121, so that the spot welding space formed by the welding notch 121 is more clear with respect to the land portion 53, which not only ensures sufficient spot welding space, but also supports spot welding operations. The scope is further restricted.

Further, referring specifically to FIGS. 3, 5 and 6, the upper surface of the positioning boss 123 is higher than the bottom surface of the avoiding notch 131, and the bottom surface of the avoiding notch 131 is perpendicular to the peripheral side of the positioning boss 123. On the one hand, when the magnetic bowl 21 abuts on the positioning boss 123, a part of the welding notch 121 is covered by the magnetic bowl 21, and the other part of the welding notch 121 is covered by the breathable damping member 40; on the other hand, the positioning boss The upper surface of 123 is higher than the bottom surface of the groove of the avoiding notch 131, and the position of the breathable damping member 40 can be restricted.

Preferably, the welding notch 121 is arranged in a U-shaped structure, and the symmetry axis of the welding notch 121 coincides with the symmetry axis of the land portion 53. The spatial position of the welding notch 121 is reasonably set relative to the land portion 53 so that the land portion 53 can be located in the middle of the spot welding space formed by the welding notch 121, which facilitates the subsequent spot welding work to proceed smoothly.

Further, the extension portion 11 is provided with leakage holes 122 on both sides of the welding notch 121, and the two leakage holes 122 are relatively spaced with respect to the center line of the symmetry axis of the welding notch 121. The leakage hole 122 plays a role in maintaining the balance of the internal and external air pressure in the sound cavity of the earphone core. The leakage hole 122 is arranged on both sides of the welding notch 121 at a relative interval with the symmetry axis of the welding notch 121 as the center line, which can ensure that the leakage hole 122 is in the basin. The frame 10 is uniformly arranged on the main body, while maintaining the stability of the main body of the basin frame 10 at the position of the welding notch 121, thereby ensuring the structural stability of the entire earphone core.

This embodiment also provides an earphone. The earphone includes the earphone core as described above. The earphone core increases the spot welding space by opening a welding notch 121 in the extension part 12, and sets the shape and spatial position of the welding notch 121 , To facilitate the spot welding work. After the spot welding is completed, the welding gap 121 is covered by the second cover portion 42 of the breathable damping member 40, which effectively solves the need for the magnetic circuit to shrink in order to meet the spot welding space. The magnetic circuit system 20 cannot be maximized and the performance of the earphone is reduced. Therefore, the sound quality performance of the earphone has also been improved, which meets people's increasing performance requirements for earphones.

The above are only the embodiments of the present utility model. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these all belong to the present utility model. New scope of protection.

Claims

A headphone core includes: a basin frame with a containing space, a vibration system contained in the containing space, and a magnetic circuit system for driving the vibration system to emit sound; the basin frame includes a fixed connection with the vibration system The main body part and the extension part bent and extended from the main part toward the vibration system, the magnetic circuit system includes a magnetic bowl held on the extension part, and the vibration system includes a magnetic bowl held on the main part The diaphragm and the voice coil fixed on the side of the diaphragm close to the magnetic circuit system, wherein the earphone core further includes a flexible circuit board electrically connected to the voice coil, and the flexible circuit board includes The first fixing portion to which the voice coil is fixed, the second fixing portion to be fixed to the frame, and the land portion extending from the first fixing portion toward the second fixing portion, and the land portion along The orthographic projection of the vibration direction of the diaphragm at least partially overlaps the extension portion, and the extension portion is provided with a welding notch corresponding to the pad portion.
The earphone core according to claim 1, wherein the frame further comprises a retaining wall extending from a side of the extension part away from the diaphragm in a direction away from the diaphragm, and the retaining wall surrounds the diaphragm. The magnetic bowl is spaced apart from the magnetic bowl, and the retaining wall is provided with an escape notch corresponding to the welding notch.
The earphone core according to claim 2, wherein the earphone core further comprises an air-permeable damping member for covering the avoidance gap.
The earphone core according to claim 3, wherein the extension portion further comprises a leakage hole provided on a side of the extension portion away from the magnetic bowl, and the air-permeable damping member includes a leakage hole for covering the leakage hole. The first covering portion and the second covering portion for covering the avoiding gap, the second covering portion extends from the first covering portion to the avoiding gap to cover the welding gap.
The earphone core according to claim 4, wherein the bottom surface of the avoiding notch is flush with the surface of the extension part.
The earphone core according to any one of claims 2-5, wherein the peripheral wall of the magnetic bowl is provided with a positioning groove, and the extension portion extends toward the magnetic bowl to form a matching groove with the positioning groove. The positioning bosses are separately arranged on both sides of the welding gap.
The earphone core according to claim 6, wherein the peripheral side surface of the positioning boss is in contact with the inner wall surface of the welding notch.
The earphone core according to claim 7, wherein the upper surface of the positioning boss is higher than the bottom surface of the avoiding notch, and the bottom surface of the avoiding notch is perpendicular to the peripheral side of the positioning boss.
The earphone core according to claim 1, wherein the welding notch is arranged in a U-shaped structure, and the symmetry axis of the welding notch coincides with the symmetry axis of the pad portion.
An earphone, characterized in that the earphone comprises the earphone core according to any one of claims 1-9.