CN217985362U

CN217985362U - Earphone unit and earphone

Info

Publication number: CN217985362U
Application number: CN202222270982.9U
Authority: CN
Inventors: 杨郑; 孔令勇; 高磊
Original assignee: Hefei Ustc Iflytek Co ltd
Current assignee: Hefei Ustc Iflytek Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-12-06
Anticipated expiration: 2032-08-26

Abstract

The utility model discloses an earphone unit and earphone, this earphone unit include earlap and baffle, the earlap with form the back cavity between the baffle, be equipped with in the back cavity and separate the cavity, separate the cavity through first through-hole with back cavity intercommunication still includes acoustic resistance piece and receiver subassembly, acoustic resistance piece covers first through-hole, the receiver unit mount be in separate in the cavity. By optimizing the rear cavity structure of the earphone unit, the low-frequency characteristic of the earphone unit can be improved on the basis of not increasing the whole volume of the rear cavity, and the noise reduction effect of the earphone is ensured.

Description

Earphone unit and earphone

Technical Field

The utility model relates to an earphone technical field especially relates to an earphone unit and earphone.

Background

The rear cavity structure of the existing active noise reduction earphone adopts an independent rear cavity structure, so that the consistency of the left earphone and the right earphone can be ensured; however, the low-frequency characteristic of the SPK-FB (horn-feedback microphone) transfer function characteristic of the earphone is closely related to the volume of the independent back cavity, if the volume of the independent back cavity is small, the amplitude of the SPK-FB transfer function low frequency is reduced, the gain of the filter parameter needs to be increased to obtain a good noise reduction effect, the increase of the parameter gain inevitably increases the noise floor under the noise reduction mode, and an independent back cavity with a larger volume needs to be designed for reducing the noise floor, so that the development of the earphone towards a smaller and thinner direction is restricted because the independent back cavity needs to ensure a certain volume.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an earphone unit and earphone optimizes through the rear cavity structure to the earphone unit, on the basis that does not increase the whole volume of rear cavity, can improve the low frequency characteristic of earphone unit, ensures the noise reduction of earphone.

In order to solve the technical problem, the utility model provides an earphone unit, including earlap and baffle, the earlap with form the rear cavity body between the baffle, be equipped with in the rear cavity body and separate the cavity, separate the cavity through first through-hole with rear cavity body intercommunication still includes acoustic resistance piece and receiver subassembly, acoustic resistance piece covers first through-hole, the receiver unit mount be in separate in the cavity.

The utility model provides an earphone unit is equipped with the partition cavity in the cavity of back, with receiver subassembly installation in separating the cavity, that is to say, be equipped with the partition cavity that covers the receiver subassembly in the cavity of back, separate the cavity through first through-hole and back cavity intercommunication, and cover first through-hole with the sound resistance piece, thus, can realize the high absorption of separating the internal sound wave of cavity, be equivalent to the volume that has enlarged the back cavity in acoustics, be favorable to improving earphone unit's low frequency characteristic, improve earphone unit's the index of making an uproar of falling, ensure receiver subassembly's stability.

The earphone unit as described above, the separation cavity has a second through hole communicating with the rear cavity, and the second through hole is covered with a metal mesh.

In the earphone unit, the metal net is bonded and fixed on the inner cavity wall surface of the separation cavity.

The earphone unit as described above, wherein the sound-resistor member includes a tuning paper.

In the earphone unit, the outer cavity wall surface of the separation cavity has a recess, the first through hole is located in the recess, and the sound-blocking member is fixed in the recess.

The earphone unit as described above, the ear shell includes a shell body and a peripheral wall portion, the peripheral wall portion extends from an inner surface of the shell body to a direction of the partition plate, the peripheral wall portion is connected to the partition plate in a sealing manner, and the peripheral wall portion, a part of the partition plate and a part of the shell body enclose to form the partition cavity.

In the earphone unit as described above, the partition plate has a first annular groove, a seal ring is provided in the first annular groove, and the peripheral wall portion is inserted into the first annular groove and pressed against the seal ring.

In the earphone unit described above, the gasket has a compression deformation amount of 15% to 25%.

In the earphone unit, the partition board is provided with a second annular groove, and the receiver assembly is clamped in the second annular groove and fixed with the partition board through glue.

The utility model also provides an earphone, including two earphone units, earphone unit is above-mentioned arbitrary earphone unit.

Since the earphone unit has the technical effects, the earphone including the earphone unit also has the same technical effects, and the discussion is not repeated here.

Drawings

Fig. 1 is a schematic cross-sectional view of an embodiment of an earphone unit provided by the present invention;

FIG. 2 is a partial enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic view of the construction of the earshell of FIG. 1;

FIG. 4 is a schematic view of the separator of FIG. 1;

fig. 5 is a schematic structural diagram of the receiver assembly in fig. 1;

FIG. 6 is a schematic structural diagram of the tuning paper in FIG. 1;

FIG. 7 is a schematic view of the structure of the metal mesh of FIG. 1;

fig. 8 is a schematic structural view of the sealing ring in fig. 1.

Description of reference numerals:

the ear shell 10, the shell body 11, the peripheral wall part 12, a first through hole 121, a second through hole 122, a wire outlet 123 and a concave part 124;

a partition plate 20, a first annular groove 21, a second annular groove 22;

the microphone assembly 30, the wiring harness 31, the sealing ring 40, the sound mixing paper 50 and the metal net 60;

and a rear cavity a1 for separating the cavity a2.

Detailed Description

In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description.

For ease of understanding and simplicity of description, the following description is provided in conjunction with the earphone unit and the earphone, and the advantageous effects will not be repeated.

The utility model provides an earphone can include two earphone units, is left ear unit and right ear unit respectively, and the form of earphone can be the wear-type, also can be for the pleasant formula etc. according to the form of earphone, and it can also have other single structures, for example when the earphone is the wear-type structure, still including the bandeau unit of connecting two earphone units.

The focus here is on improving the rear cavity structure of the earphone unit, which will be described in detail later, where the rear cavity structure refers to a cavity structure relatively far away from the human ear after being worn; other structural designs of the earphone unit can be realized based on the prior art, and are not described in detail herein.

Referring to fig. 1, fig. 1 is a schematic cross-sectional view of an embodiment of an earphone unit provided in the present invention.

In this embodiment, the earphone unit includes an earshell 10 and a partition plate 20, which are fixed to each other, a rear cavity a1 is formed between the earshell 10 and the partition plate 20, a separation cavity a2 is provided in the rear cavity a1, and the separation cavity a2 is communicated with the rear cavity a1 through a first through hole 121.

The earphone unit further includes a sound resistance member and a receiver assembly 30, the receiver assembly 30 being installed in the separation chamber a2, the sound resistance member covering the first through hole 121. The receiver assembly 30 is used to convert an electrical signal into an acoustic signal, which is a conventional structure of an earphone unit.

The sound-resistance piece can be made of sound-control paper 50, and the sound-control paper 50 has the advantages of uniform density, uniform density of air holes, good thickness consistency and waterproof effect, and is beneficial to improving the sound frequency characteristic; in practical application, the sound-resisting piece can also be made of tuning cotton and the like.

In the above-mentioned earphone unit provided by this embodiment, a separation cavity a1 is provided in the rear cavity a1, and the receiver assembly 30 is installed in the separation cavity a2, that is, a separation cavity a2 covered by the receiver assembly 30 is provided in the rear cavity a1, the separation cavity a2 is communicated with the rear cavity a1 through the first through hole 121, and the first through hole 121 is covered by the tuning paper 50, so that high absorption of sound waves in the separation cavity a2 can be realized, which is acoustically equivalent to enlarging the volume of the rear cavity a1, and under the condition that the volume of the rear cavity a1 is not changed, the earphone unit is applied to facilitate improving the low-frequency characteristic of the earphone unit, thereby improving the noise reduction index of the earphone unit, and ensuring the stability of the receiver assembly 30. It can be understood that under the condition of ensuring the same low-frequency characteristic and noise reduction index, compared with the existing earphone unit, the structure of the earphone unit can reduce the volume of the rear cavity a1, and the earphone unit is favorable for developing towards a smaller and thinner direction.

The equivalent increased volume of the rear cavity a1 of the headphone unit is related to the size and number of the first through holes 121, the characteristics of the tuning paper 50, and the like, so in practical applications, the number, size, shape, and the like of the first through holes 121 that communicate the partition cavity a2 and the rear cavity a1 may be determined according to performance indexes and the like required for the headphone unit. The structural form of one first through hole 121 is illustrated by way of example, the first through hole 121 is illustrated as a circular hole, and the tuning paper 50 covering the first through hole 121 is also in a circular shape, as shown in fig. 6, but in other embodiments, the shape of the tuning paper 50 is not limited, and may be square, oval, irregular, or the like, as long as it can cover the first through hole 121.

In this embodiment, the separation cavity a2 is further communicated with the rear cavity a1 through the second through hole 122, and the earphone unit further includes a metal net 60 covering the second through hole 122, as shown in fig. 7, fig. 7 only illustrates the shape of the metal net 60, and the mesh hole on the metal net is not shown. The arrangement of the metal net 60 and the second through holes 122 can play a role of damping for balancing the internal and external air pressures of the separation chamber a2. The mesh size and density of the metal mesh 60 may be determined according to the actual application requirement, and is not limited herein.

Referring to fig. 3 and 4 together, fig. 3 and 4 show the structure of the earshell and the diaphragm of fig. 1, respectively.

In the present embodiment, the ear shell 10 includes a shell body 11 and a peripheral wall portion 12, the peripheral wall portion 12 extends from the inner surface of the shell body 11 to the direction of the diaphragm 20, after the ear shell 10 is fixed to the diaphragm 20, the peripheral wall portion 12 is hermetically connected to the diaphragm 20, and the portion of the diaphragm 20, the peripheral wall portion 12 and the portion of the shell body 11 enclose the separation cavity a2. So positioned, the rear cavity a1 surrounds the partition cavity a2.

The peripheral wall 12 and the housing body 11 may be integrally formed to reduce the number of connecting structures, thereby facilitating the assembly of the earphone unit. Of course, in other embodiments, the cavity wall forming the separation cavity a2 can be formed separately and then fixed relative to the ear shell 10 and the partition 20.

Referring to fig. 2 and 8 together, fig. 2 is a partially enlarged view of a portion a in fig. 1, and fig. 8 shows a structure of the seal ring in fig. 1.

In this embodiment, the partition plate 20 has the first annular groove 21, the sealing ring 40 is disposed in the first annular groove 21, and after the ear shell 10 is fixedly connected to the partition plate 20, the peripheral wall portion 12 of the ear shell 10 is inserted into the first annular groove 21 and pressed against the sealing ring 40, thereby achieving the sealing property of the partition cavity a1 and ensuring the performance of the earphone unit.

In practical application, the sealing ring 40 may be an EVA sealing ring, which is an ethylene-vinyl acetate copolymer, and has good flexibility, shock resistance and high pressure resistance, and is beneficial to ensuring the sealing effect. Of course, other materials may be used for the sealing ring 40, such as a sealing rubber ring.

As shown in fig. 2, the cross section of the sealing ring 40 may be trapezoidal, which facilitates assembly and facilitates deformation of the sealing ring 40 by the peripheral wall 12 to ensure sealing effect. Of course, in other embodiments, the cross-section of the sealing ring 40 may be generally circular or elliptical.

In a specific application, in order to ensure the acoustic sealing effect, after the assembly, the sealing ring 40 has a compression deformation amount of 15% to 25%, for example, the sealing ring 40 has a compression deformation amount of 20%.

In practice, the amount of compression deformation of the seal ring 40 can be controlled by controlling the depth of the peripheral wall portion 12 extending into the first annular groove 21. For example, a step surface facing the first annular groove 21 may be provided at one end of the peripheral wall portion 12 close to the partition plate 20, and after the peripheral wall portion 12 is inserted into the first annular groove 21, the insertion depth of the peripheral wall portion 12 may be limited by the step surface abutting against a groove wall portion forming the first annular groove 21, thereby controlling the amount of compression deformation of the seal ring 40.

In the present embodiment, the first through hole 121 and the second through hole 122 are formed in the peripheral wall portion 12, and when specifically provided in combination with fig. 1 and 3, a concave portion 124 may be provided on an outer wall surface of the peripheral wall portion 12, that is, an outer cavity wall surface of the partition cavity a2, the first through hole 121 may be positioned in the concave portion 124, the tuning paper 50 may be adhesively fixed to the concave portion 124, and the concave portion 124 may be provided to limit the position of the tuning paper 50, thereby preventing the position of the tuning paper 50 from changing. Here, "outer" refers to the side away from the separation chamber a2.

Generally, one side of the tuning paper 50 is coated with a back adhesive, and a release paper coated on the surface of the back adhesive is peeled off and stuck in the concave portion 124 therebetween at the time of assembly.

Specifically, the metal mesh 60 may be fixed to the inner wall surface of the peripheral wall portion 12 by means of adhesion so as to cover the second through hole 122, that is, the metal mesh 60 is adhered to the inner wall surface of the partition chamber a2.

The sound mixing paper 50 and the metal net 60 are both adhered, so that the operation is convenient, the adhesion is firm, and the falling is not easy.

Referring to fig. 5, fig. 5 is a schematic structural diagram of the receiver assembly 30 in fig. 1.

The receiver assembly 30 is provided with a wire harness 31, which needs to be electrically connected with elements such as a circuit board of the earphone unit through the wire harness 31, and in order to facilitate the electrical connection of the receiver assembly 30, a wire outlet hole 123 may be further opened on the peripheral wall portion 12, so as to facilitate the wire harness 31 of the receiver assembly 30 in the separation cavity a2 to extend out of the separation cavity a2 through the wire outlet hole 123.

In this embodiment, in order to facilitate the position limitation of the receiver assembly 30, the partition plate 20 is further provided with a second annular groove 22, and the receiver assembly 30 is clamped in the second annular groove 22 and fixed to the partition plate 20 by an adhesive, it can be understood that, in order to make the receiver assembly 30 located in the separation cavity a2, the second annular groove 22 of the partition plate 20 is located inside the first annular groove 21.

In operation, the receiver assembly 30 is clamped in the second annular groove 22, a suitable glue is applied around the second annular groove for fixing, and the wire harness 31 is arranged and then passes through the wire outlet 123.

It is right above that the utility model provides an earphone unit and earphone have all carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The earphone unit comprises an earshell and a partition plate, wherein a rear cavity is formed between the earshell and the partition plate, and the earphone unit is characterized in that a separation cavity is arranged in the rear cavity and communicated with the rear cavity through a first through hole, the earphone unit also comprises a sound resistance piece and a receiver assembly, the sound resistance piece covers the first through hole, and the receiver assembly is installed in the separation cavity.

2. The earphone unit according to claim 1 wherein the separation chamber has a second through hole communicating with the rear chamber, the second through hole being covered with a metal mesh.

3. The earphone unit of claim 2 wherein the metal mesh is adhesively secured to the inner chamber wall of the separation chamber.

4. The earphone unit of claim 1, wherein the sound resistor comprises a tuning paper.

5. The earphone unit according to claim 4 wherein the outer cavity wall surface of the separation chamber has a recess in which the first through-hole is located, the acoustic resistor being fixed in the recess.

6. The earphone unit according to any of claims 1-5, wherein the ear shell comprises a shell body and a peripheral wall portion extending from an inner surface of the shell body in a direction of the diaphragm, the peripheral wall portion being in sealing connection with the diaphragm, the peripheral wall portion, a part of the diaphragm and a part of the shell body enclosing the separation cavity.

7. The earphone unit according to claim 6, wherein the partition plate has a first annular groove in which a seal ring is provided, and the peripheral wall portion is inserted into the first annular groove and pressed against the seal ring.

8. The earphone unit according to claim 7, wherein the gasket has a compression deformation amount of 15% to 25%.

9. The earphone unit according to any of claims 1-5 wherein the spacer has a second annular groove, the receiver assembly being snapped into the second annular groove and secured to the spacer by glue.

10. A headset comprising two headset units, characterized in that the headset units are as claimed in any one of claims 1-9.