CN220273831U

CN220273831U - Closed sound cavity structure for reducing leakage sound of bone conduction earphone and earphone

Info

Publication number: CN220273831U
Application number: CN202321466190.7U
Authority: CN
Inventors: 郭宝庆
Original assignee: Shenzhen Mengqu Life Technology Co ltd
Current assignee: Shenzhen Mengqu Life Technology Co ltd
Priority date: 2023-06-09
Filing date: 2023-06-09
Publication date: 2023-12-29
Anticipated expiration: 2033-06-09

Abstract

The utility model relates to the technical field of headphones, in particular to a closed sound cavity structure for reducing sound leakage of a bone conduction headphone and the headphone, wherein the closed sound cavity structure comprises a vibrator assembly and a vibrator shell, the vibrator assembly is arranged in the vibrator shell, the vibrator shell comprises a vibrator upper shell and a vibrator lower shell, and a vibrator bracket is arranged in the vibrator lower shell; the vibrator assembly is erected on the vibrator support, and the vibrator assembly and the vibrator support form a closed cavity. According to the utility model, the vibrator support is arranged on the lower shell of the vibrator, the inner side of the vibrator support is provided with a whole circle of continuous tooth-shaped structure, the vibrator support is used for supporting the vibrator assembly to suspend the vibrator assembly, the vibrator is not limited by the vibrator shell during vibration, the vibration amplitude of the vibrator is larger, and the bass is better. Through the tooth-like structure of oscillator support inboard, can be more effectual will diverge the sound rebound of all around and gather together, reduce the propagation of sound all around, reduced the sound leakage, sound directivity is stronger after gathering together simultaneously.

Description

Closed sound cavity structure for reducing leakage sound of bone conduction earphone and earphone

Technical Field

The utility model relates to the technical field of earphones, in particular to a closed sound cavity structure of a bone conduction earphone for reducing sound leakage and the earphone.

Background

The bone conduction earphone vibrator is an important component of the bone conduction earphone, and is a device for transmitting sound into the inside of the cochlea in a vibration form. The bone conduction earphone vibrator transmits sound wave signals to the inside of the skull by utilizing vibration, and then the sound wave signals are transmitted to the inner ear through the skull, so that a hearing function is realized.

Compared with the traditional earphone, the bone conduction earphone vibrator does not need to transmit sound into the inside through the auditory canal, but directly conducts the sound through the skull, so that the bone conduction earphone vibrator has less interference to external environment noise and has certain practicability for people in special occasions. Bone conduction headphones may typically play audio over bluetooth or a wired connection.

In the prior bone conduction earphone vibrator sound cavity proposal, one side of vibrator vibration is directly stuck on a vibrator shell, and the proposal leads the vibrator vibration to be bound by the shell because of the vibrator and the shell, and the vibrator amplitude is smaller under the same power, thus leading to weaker bass.

Disclosure of Invention

The present utility model is directed to a closed sound cavity structure of a bone conduction earphone and an earphone for reducing sound leakage, and at least to solve one of the problems set forth in the background art.

The technical scheme of the utility model is as follows:

the closed sound cavity structure for reducing the sound leakage of the bone conduction earphone comprises a vibrator assembly and a vibrator shell, wherein the vibrator assembly is arranged in the vibrator shell, the vibrator shell comprises a vibrator upper shell and a vibrator lower shell, and a vibrator bracket is arranged in the vibrator lower shell;

the vibrator support is hollow cylindrical with one end open, the vibrator assembly is fixed at the open end of the vibrator support and seals the open end, so that a closed cavity is formed inside the vibrator support, and the inner side wall of the vibrator support is provided with a whole circle of densely distributed tooth-shaped structures.

Further, the vibrator assembly includes: the upper fixing ring and the lower fixing ring are connected through the vibrating piece, and the diameter of the upper fixing ring is larger than that of the lower fixing ring.

Further, coil PCBA is fixedly arranged at the upper end of the upper fixing ring, a coil, a washer and a magnet are sequentially arranged between the coil PCBA and the lower fixing ring, the circumferential edge of the coil is arranged on the coil PCBA, the vibrating piece is fixed on the lower fixing ring, and the washer is fixedly connected with the upper surface of the magnet.

Further, a mounting ring is arranged at the circumferential edge of the upper end of the lower fixing ring, and the upper surface of the vibrating piece is fixedly connected with the lower surface of the mounting ring.

Further, the upper end part of the upper fixing ring is provided with a first step, and the coil PCBA is fixedly arranged in the first step.

Further, the lower end part of the upper fixing ring is provided with a second step, the upper end part of the oscillator support is provided with a third step, and the second step is matched with the third step.

Further, a plurality of hollows are formed in the vibration piece.

Further, a vibrator adapter plate is further arranged in the vibrator shell and fixedly connected with the vibrator upper shell, and the vibrator adapter plate is electrically connected with the vibrator assembly.

Further, a first connecting column is arranged in the oscillator upper shell, and the oscillator adapter plate is fixedly connected with the first connecting column through a first connecting piece.

Further, the lower oscillator shell and the upper oscillator shell are fixed together through a positioning column.

The closed sound cavity structure for reducing sound leakage of the bone conduction earphone comprises the ear-hook assembly, the vibrator shell is fixedly connected with the end part of the ear-hook assembly, an adapter wire is arranged in the ear-hook assembly, and the vibrator adapter plate is electrically connected with the adapter wire.

The utility model provides a closed sound cavity structure for reducing sound leakage of a bone conduction earphone and the earphone by improving the structure, and compared with the prior art, the bone conduction earphone has at least one of the following improvements and advantages:

1. according to the utility model, a circle of oscillator support is arranged on the oscillator lower shell, and a whole circle of continuous tooth-shaped structure is arranged on the inner side of the oscillator support. The vibrator assembly is suspended by using the vibrator support to support the vibrator assembly, the vibrator assembly and the vibrator lower shell form a closed and airtight sound cavity, and when the vibrator assembly vibrates, the vibrator assembly is suspended, the vibration piece is not limited by the vibrator shell, the vibration piece has larger amplitude, and therefore bass is better.

2. According to the utility model, through the tooth-shaped structure at the inner side of the vibrator bracket, sound emitted to the periphery can be more effectively bounced and gathered, and the transmission of sound to the periphery is reduced, so that the leakage sound is reduced. Meanwhile, after the sound is gathered, the directivity of the sound is stronger.

Drawings

The utility model is further explained below with reference to the drawings and examples:

FIG. 1 is an exploded view of a closed acoustic cavity structure according to the present utility model;

FIG. 2 is an exploded view of the vibrator assembly of the present utility model;

FIG. 3 is a cross-sectional view of a vibrator assembly according to the present utility model;

fig. 4 is a schematic structural view of a lower shell of the vibrator according to the present utility model;

fig. 5 is a schematic structural diagram of the earphone according to the present utility model.

Reference numerals illustrate:

1. a vibrator assembly; 2. a vibrator case; 3. a vibrator adapter plate; 4. an ear-hook assembly; 5. a rear hitch assembly;

41. an patch cord; 21. a vibrator upper case; 22. a vibrator lower case; 221. a vibrator support; 11. a fixing ring is arranged on the upper part; 12. a lower fixing ring; 13. a vibrating piece; 14. a coil PCBA; 15. a coil; 16. washer; 17. a magnet; 121. a mounting ring; 111. a first step; 112. a second step; 222. a third step; 223. and positioning columns.

Detailed Description

The following detailed description of the utility model clearly and completely describes the technical solution in the embodiments of the utility model.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

It should also be understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

In addition, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

The utility model provides a closed sound cavity structure for reducing sound leakage of a bone conduction earphone and the earphone by improving the structure, and the technical scheme of the utility model is as follows:

as shown in fig. 1, a closed sound cavity structure of a bone conduction earphone for reducing sound leakage comprises a vibrator assembly 1 and a vibrator shell 2, wherein the vibrator assembly 1 is arranged in the vibrator shell 2, and the vibrator shell 2 can be made of a metal material or a PCB board, for example; of course, the material of the vibrator case 2 may be a plastic material. Those skilled in the art can flexibly adjust according to specific needs, and the utility model is not limited thereto.

The oscillator shell 2 comprises an oscillator upper shell 21 and an oscillator lower shell 22, the oscillator lower shell 22 and the oscillator upper shell 21 are fixed together through a positioning column 223, and the oscillator lower shell 22 and the oscillator upper shell 21 can be firmly bonded by adding an adhesive. Of course, other means of attachment known to those skilled in the art may be used.

As shown in fig. 4, a vibrator support 221 is disposed in the vibrator lower case 22, the vibrator support 221 is a hollow cylinder with an opening at one end, the vibrator assembly 1 is fixed at the opening end of the vibrator support 221 and seals the opening end, so that a closed cavity is formed inside the vibrator support 221, and a complete circle of densely distributed tooth-shaped structures are disposed on the inner side wall of the vibrator support 221. The continuous tooth-shaped structure is designed on the inner side of the vibrator lower shell 22, so that sound diffused to the periphery rebounds towards the center of the sound cavity, sound leakage to the periphery is reduced, and sound directivity of the bone conduction earphone is improved.

The vibrator assembly 1 is erected on the vibrator support 221, and the vibrator assembly 1 and the vibrator support 221 form a closed cavity. The effective volume of the vibrator assembly 1 is increased, thereby improving sound quality. Specifically, the vibrator assembly 1 is supported by the vibrator support 221, so that the vibrator assembly 1 is suspended, a closed and airtight sound cavity is formed between the vibrator assembly 1 and the vibrator lower case 22, and when the vibrator assembly 1 vibrates, the vibrator assembly 1 is suspended, so that the vibrator piece 13 is not limited by the case, the vibration amplitude of the vibrator piece 13 is larger, and therefore bass is better. Specifically, the vibrator assembly 1 and the vibrator support 221 may be bonded together by using an adhesive, and of course, other connection manners known to those skilled in the art may be used.

As shown in fig. 2 and 3, the vibrator assembly 1 includes: the upper fixing ring 11 and the lower fixing ring 12, wherein the diameter of the upper fixing ring 11 is larger than that of the lower fixing ring 12, and specifically, the outer diameter of the upper fixing ring 11 is 0.5-5 mm smaller than the inner diameter of the lower fixing ring 12. The upper fixing ring 11 and the lower fixing ring 12 are connected through a vibrating piece 13. When the vibrator assembly 1 vibrates, because the diameter of the upper fixing ring 11 is larger than that of the lower fixing ring 12, a gap is formed between the upper fixing ring 11 and the lower fixing ring 12, the vibrating piece 13 is arranged in the gap between the upper fixing ring 11 and the lower fixing ring 12, and the vibrating piece 13 is not blocked up and down when vibrating, that is, the vibrating piece 13 is suspended, and when the vibrator assembly 1 vibrates, the vibrating piece 13 is suspended and is not limited by a shell, so that the vibration amplitude of the vibrating piece 13 is larger, and the bass effect is better.

As shown in fig. 2 and 3, a coil PCBA14 (Printed Circuit Board Assembly, an assembly circuit board for producing coil electronic components) is fixedly disposed at the upper end of the upper fixing ring 11, and a coil 15, a washer 16 and a magnet 17 are sequentially disposed between the coil PCBA14 and the lower fixing ring 12. The upper retainer ring 11 and the lower retainer ring 12 may have a cylindrical shape, a rectangular parallelepiped shape, or the like, for example, so long as they can form a closed cavity with the transducer holder 221. Those skilled in the art can flexibly adjust according to specific needs, and the utility model is not limited thereto.

As shown in fig. 3, the peripheral edge of the coil 15 is mounted on the coil PCBA14, the vibrating plate 13 is fixed on the lower fixing ring 12, and the washer 16 is fixedly connected with the upper surface of the magnet 17. When the magnet 17 conducts noise through resonance, it may cause distortion of audio, and the provision of the washer 16 can reduce the vibration conduction of the magnet 17, thereby improving the sound expression.

Further, a mounting ring 121 is disposed at the circumferential edge of the upper end of the lower fixing ring 12, and the upper surface of the vibrating piece 13 is fixedly connected with the lower surface of the mounting ring 121. The mounting ring 121 serves to strengthen the fixation, so that loosening or falling-off caused by vibration or impact can be reduced. Thereby effectively maintaining the performance and durability of the earphone. And the position and the direction of other spare parts can be effectively fixed, the position of the spare parts in the earphone is accurate and stable, and more accurate positioning and fixing positions are provided, so that the tone quality performance of the earphone is improved.

The upper end of the upper fixing ring 11 is provided with a first step 111, and the coil PCBA14 is fixedly arranged in the first step 111. The lower end of the upper fixing ring 11 is provided with a second step 112, the upper end of the vibrator support 221 is provided with a third step 222, and the second step 112 is matched with the third step 222. Through setting up first step 111, second step 112 and third step 222 to be used for improving sealed effect, the area of contact between upper retainer plate 11 and coil PCBA14, lower retainer plate 12 and oscillator support 221 can be increased in the design of step, and then strengthen sealed effect, reduce the risk of sound leakage. And meanwhile, the deformation of the transition area and the plastic deformation rate under the condition of compression can be reduced, so that the connecting part is more stable and is not easy to deform in the process of being extruded and twisted.

As shown in fig. 2, the vibration plate 13 is provided with a plurality of hollows, and the hollows are arc-shaped, and by arranging the hollows on the vibration plate 13, the vibration quality can be reduced, and the response performance and dynamic response capability of the vibration plate can be improved. The resonance peak can be reduced, the audio response is smoother, the tone quality performance is improved, the permeability and comfort level can be improved, and therefore the performance of the tone quality of the earphone and the use experience of a user are improved.

As shown in fig. 1, the oscillator adapter plate 3 is further disposed in the oscillator housing 2, the oscillator adapter plate 3 is fixedly connected with the oscillator upper housing 21, the oscillator adapter plate 3 is electrically connected with the oscillator assembly 1, and the oscillator adapter plate 3 and the oscillator assembly 1 can be electrically connected together by bonding with an adhesive or welding and bonding with solder paste, so that a person skilled in the art can flexibly select the oscillator according to needs, and the oscillator is not limited.

A first connecting post (not shown in the figure) is disposed in the oscillator upper case 21, the oscillator adapting plate 3 is fixedly connected with the first connecting post through a first connecting piece, in some embodiments, the first connecting piece may be a screw, a thread is disposed in the first connecting post, and the first connecting piece is matched with the first connecting post through a thread, so that the oscillator adapting plate 3 is fixed in the oscillator upper case 21.

As shown in fig. 5, an earphone includes the closed sound cavity structure for reducing sound leakage of the bone conduction earphone, and further includes an ear-hook assembly 4 fixedly connected with the vibrator shell 2, where the end of the ear-hook assembly 4 is fixedly connected, an adapter wire 41 is disposed in the ear-hook assembly 4, the vibrator adapter plate 3 is electrically connected with the adapter wire 41, and the vibrator adapter plate 3 and the adapter wire 41 can be electrically connected together by bonding with an adhesive or welding with solder paste, so that a person skilled in the art can flexibly select according to needs, and the earphone is not limited. The present application describes only elements on one side of the headset, the elements on the left and right sides being connectable by a rear hitch assembly 5.

In the process of installing the earphone, firstly, the oscillator upper shell 21 is fixed on the ear-hook assembly 4, then the oscillator adapter plate 3 and the adapter wire 41 on the ear-hook assembly 4 are welded, and then the oscillator adapter plate 3 is fixed on the oscillator upper shell 21. Then, the vibrator assembly 1 is put on the vibrator support 221 of the vibrator lower case 22, then the vibrator assembly 1 and the vibrator lower case 22 are adhered together by glue or other adhesives, and then the vibrator assembly 1 and the vibrator adapter plate 3 are connected by welding lines. Finally, the oscillator lower shell 22 and the oscillator upper shell 21 are fixed together through glue and the positioning column 223. The earphone can be installed.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.

Claims

1. The closed sound cavity structure for reducing leakage sound of the bone conduction earphone comprises a vibrator assembly (1) and a vibrator shell (2), wherein the vibrator assembly (1) is arranged in the vibrator shell (2), and the closed sound cavity structure is characterized in that the vibrator shell (2) comprises a vibrator upper shell (21) and a vibrator lower shell (22), and a vibrator support (221) is arranged in the vibrator lower shell (22);

the vibrator support (221) is hollow cylindrical with one end open, the vibrator assembly (1) is fixed at the open end of the vibrator support (221) and seals the open end, so that a closed cavity is formed inside the vibrator support (221), and a tooth-shaped structure densely distributed in a circle is arranged on the inner side wall of the vibrator support (221).

2. The closed sound cavity structure of bone conduction earphone according to claim 1, wherein the vibrator assembly (1) comprises: the upper fixing ring (11) and the lower fixing ring (12), wherein the diameter of the upper fixing ring (11) is larger than that of the lower fixing ring (12), and the upper fixing ring (11) and the lower fixing ring (12) are connected through the vibrating piece (13).

3. The closed sound cavity structure for reducing sound leakage of the bone conduction earphone according to claim 2, wherein a coil PCBA (14) is fixedly arranged at the upper end of the upper fixing ring (11), a coil (15), a washer (16) and a magnet (17) are sequentially arranged between the coil PCBA (14) and the lower fixing ring (12), the circumferential edge of the coil (15) is mounted on the coil PCBA (14), the vibrating piece (13) is fixed on the lower fixing ring (12), and the washer (16) is fixedly connected with the upper surface of the magnet (17).

4. A closed sound cavity structure for reducing sound leakage of a bone conduction earphone according to claim 2 or 3, wherein a mounting ring (121) is provided at the circumferential edge of the upper end of the lower fixing ring (12), and the upper surface of the vibrating piece (13) is fixedly connected with the lower surface of the mounting ring (121).

5. The closed sound cavity structure for reducing sound leakage of the bone conduction earphone according to claim 4, wherein a first step (111) is provided at an upper end portion of the upper fixing ring (11), and the coil PCBA (14) is fixedly provided in the first step (111).

6. The closed sound cavity structure for reducing sound leakage of the bone conduction earphone according to claim 1 or 5, wherein a second step (112) is provided at the lower end of the upper fixing ring (11), a third step (222) is provided at the upper end of the vibrator support (221), and the second step (112) is adapted to the third step (222).

7. The closed sound cavity structure for reducing leakage sound of the bone conduction earphone according to claim 6, wherein the vibration piece (13) is provided with a plurality of hollowed-out parts.

8. The closed sound cavity structure for reducing sound leakage of the bone conduction earphone according to claim 7, wherein a vibrator adapter plate (3) is further arranged in the vibrator shell (2), the vibrator adapter plate (3) is fixedly connected with the vibrator upper shell (21), and the vibrator adapter plate (3) is electrically connected with the vibrator assembly (1).

9. The closed sound cavity structure for reducing leakage sound of the bone conduction earphone according to claim 8, wherein the vibrator lower case (22) and the vibrator upper case (21) are fixed together by a positioning column (223).

10. An earphone comprising the closed sound cavity structure for reducing sound leakage of the bone conduction earphone according to any one of claims 1 to 9, and further comprising an ear-hook assembly (4), wherein the vibrator shell (2) is fixedly connected with the end part of the ear-hook assembly (4), an adapter wire (41) is arranged in the ear-hook assembly (4), and the vibrator adapter plate (3) is electrically connected with the adapter wire (41).