CN115134698A

CN115134698A - Receiver module with pressure balancing structure

Info

Publication number: CN115134698A
Application number: CN202110333257.9A
Authority: CN
Inventors: 池龙周; 姜廷昊; 朴丙真
Original assignee: EM Tech Co Ltd
Current assignee: EM Tech Co Ltd
Priority date: 2021-03-29
Filing date: 2021-03-29
Publication date: 2022-09-30

Abstract

Disclosed is a receiver module, comprising: a case including an upper case having a sound insulation hole and a lower case coupled to the upper case and having a vent hole; a receiver mounted in an inner space defined by the housing and having a frame, a magnetic circuit, a voice coil, and a diaphragm; and an air module disposed to surround the lower surface and the outer circumference of the receptor, fixed to the inner circumference of the case, and having an air path connecting the soundproofing hole and the vent hole.

Description

Receiver module with pressure balancing structure

Technical Field

The present disclosure relates to a receiver module having a pressure balancing structure.

Background

The earphones are classified into a closed type earphone in which the rest of the earphones are blocked except for a sound emission hole inserted into an ear canal, and an open type earphone including a tuning hole and a duct in addition to the sound emission hole.

The closed-type earphone directly transmits the sound of the receiver mounted in the earphone into the user's ear so that the user can hear the sound even with small power, and in particular, the in-the-canal earphone inserted into the user's ear through the earpiece has an advantage of excellent sound insulation to block ambient noise.

However, in the case of the in-canal earphone, since the ear canal is completely sealed, an atmospheric pressure difference occurs between the inside and the outside of the ear canal, and thus the ear may be sound-insulated or may be uncomfortable for some people. Korean patent registration No.10-1558091 discloses an in-the-canal type earphone including a pressure equalizing means for improving a pressure difference.

Fig. 1 is a view illustrating an in-canal earphone including a pressure balancing device according to the related art. The ear canal earphone 1 according to the related art includes a speaker unit 10, a housing 20 accommodating the speaker unit 10, and an earpiece 23 mounted on an outer surface of a tube 25 integrally formed on a front portion of the housing 20. The speaker unit 10 mounted in the housing 20 includes a cylindrical frame 11, a magnetic circuit 12 mounted in the frame 11, and a diaphragm 13 vibrated up and down by a magnetic force of the magnetic circuit 12. The frame 11 has a cylindrical shape and includes a cover 18 mounted at the front and a bracket 19 mounted at the rear. A through hole 18a is provided at the center of the cover 18 to emit the sound generated in the diaphragm 13 in the forward direction. In addition, a through hole 19a is provided at the center of the bracket 19 to discharge the sound generated in the diaphragm 13 rearward. In addition, a through hole 16a is provided at the center of the yoke 16 to emit the sound generated in the diaphragm 13 rearward.

A gasket 30 is mounted on the front surface of the cover 18. The gasket 30 is formed of an elastic material such as rubber or silicone. In addition, a through hole 30a is provided at the center of the gasket 30 to discharge sound emitted from the speaker unit 10.

A pressure equalizing device for discharging air existing in front of the speaker unit 10 to the rear of the speaker unit 10 to eliminate a pressure difference between the ear canal of the user and ambient air is provided. The pressure balancing apparatus of the earphone according to the related art includes: a lateral air passage 50 for discharging air of the inside a of the tube 25 or air of the inside B of the speaker unit 10 to a side surface C of the gasket 30 or a side surface D of the speaker unit 10; and a rearward air passage 60 for discharging air on the side surface C of the gasket 30 or air on the side surface D of the speaker unit 10 to the rear E of the speaker unit 10.

However, in the case of the in-canal earphone, if the ear canal is not completely sealed when worn, sound pressure inevitably decreases in a low frequency range. Therefore, it is required to develop a structure capable of compensating for a reduction in sound pressure in a low frequency range while improving a sound insulation feeling of the ear canal earphone by providing an air passage.

[ related art documents ]

[ patent document ]

(patent document 1) Korean patent registration No.10-1558091

Disclosure of Invention

[ problem ] to provide a method for producing a semiconductor device

Accordingly, it is an object of the present disclosure to provide a receiver module including an air module that can be installed as a pressure balancing structure outside of a receiver without changing the structure of the receiver.

[ technical solution ] A method for producing a semiconductor device

According to an aspect of the present disclosure, there is provided a receiver module, including: a case including an upper case having a sound insulation hole and a lower case coupled to the upper case and having a vent hole; a receiver mounted in an inner space defined by the housing and having a frame, a magnetic circuit, a voice coil, and a diaphragm; and an air module disposed to surround the lower surface and the outer circumference of the receiver, fixed to the inner circumference of the housing, and disposed to be mountable on the receiver such that an air path connecting the soundproof hole and the vent is selectively disposed between the outer circumference of the receiver and the inner circumference of the housing.

Additionally, as another example of the present disclosure, the air module may also define a back volume that amplifies sound by resonance at the outer circumference of the receiver.

In addition, as another example of the present disclosure, the air module may further include a duct portion formed in the back volume and having a communication hole communicating with an outside of the back volume.

Further, as another example of the present disclosure, the air module may include a circular metal part surrounding the receiver and an injection molded product part from which the metal part is insert-injected and which has an air path.

In addition, as another example of the present invention, the receiver module may further include: a microphone for canceling active noise, wherein the microphone is located on a sound path of noise introduced through the air path such that ambient noise introduced through the air vent and through the air path is transferred to the microphone.

In addition, as another example of the present disclosure, an air path may connect an upper space formed between the upper case and the receiver and a lower space formed between the lower case and the air module, the magnetic circuit being installed in a frame of the receiver, wherein the magnetic circuit includes a cylindrical yoke coupled to the frame, a permanent magnet attached to the yoke, and a top plate attached to an upper portion of the permanent magnet, wherein the air module may be disposed below the receiver frame, have a sidewall formed to be spaced apart from a sidewall of the yoke of the receiver, and the air path is formed at a portion protruding outward from the sidewall of the air module.

Since the receiver module provided by the present disclosure includes an air module having an air path connecting an upper space of the receiver and a lower space of the receiver, an air pressure difference between the inside and the outside of the ear canal is improved.

In addition, in the receiver module provided by the present disclosure, the pressure equalizing device can be easily arranged in the module by attaching the air module to the outside of the receiver used without changing the structure of the receiver.

Drawings

Fig. 1 is a view illustrating an in-canal earphone including a pressure balancing device according to the related art;

FIG. 2 is a cross-sectional view of a receiver module having a pressure balancing structure according to an embodiment of the present disclosure;

FIG. 3 is a receiver disposed in a receiver module having a pressure equalization structure according to an embodiment of the present disclosure;

FIG. 4 is a diagram illustrating an air module having a receiver module with a pressure balancing structure according to an embodiment of the present disclosure; and

fig. 5 is a view illustrating a state in which a receiver of a receiver module having a pressure balancing structure and an air module are combined according to an embodiment of the present disclosure.

Detailed Description

Hereinafter, the present disclosure will be described in more detail with reference to the accompanying drawings.

Fig. 2 is a cross-sectional view of a receiver module having a pressure balancing structure according to an embodiment of the present disclosure.

The receiver module according to the embodiment of the present disclosure includes a receiver 100, an air module 200 coupled to the outside of the receiver 100, and a case 300 forming the outside. According to an embodiment of the present disclosure, the housing 300 provided in the receiver module includes an upper housing 310 having sound insulation holes 312 and a lower housing 320 coupled to the upper housing 310 and having air vents 322.

Spaces

314 and 324 exist between the upper housing 310 and the receiver 100 and between the lower housing 320 and the air module 200, and air can flow through the

spaces

314 and 324.

Fig. 3 is a receiver disposed in a receiver module having a pressure equalization structure according to an embodiment of the present disclosure.

The receiver 100 includes a frame 110 for securing the components. A magnetic circuit is installed in the frame 110, and the magnetic circuit includes a cylindrical yoke 121 coupled to the frame 110, a permanent magnet 122 attached to the yoke 121, and a top plate 123 attached to an upper portion of the permanent magnet 122. In addition, the lower end portion of the voice coil 130 is located in a magnetic gap formed between the side wall of the cylindrical yoke 121 and the permanent magnet 122, and the upper end portion of the voice coil 130 is attached to the diaphragm 140. The diaphragm 140 is seated on the frame 110, and a seating ring 142 formed of an injection-molded product part having a thickness and rigidity greater than that of the diaphragm 140 may be attached to the outer circumference of the diaphragm 140 to help seating.

Meanwhile, the back hole 112 may be formed in the frame 110 so that the diaphragm 140 may be smoothly vibrated.

Fig. 4 is a view illustrating an air module of a receiver module having a pressure balancing structure according to an embodiment of the present disclosure. The air module 200 is coupled to a lower side portion of the frame 110 of the receiver 100 and has a substantially cylindrical shape. The air module 200 includes a substantially cylindrical metal part 210 formed of SUS material and an injection-molded product part 220, and the metal part 210 is insert-injected from the injection-molded product part 220. The metal member 210 includes a lower surface 212 contacting the lower surface of the yoke 121 of the receiver 100 and a sidewall 214 spaced apart from the sidewall of the yoke 121 of the receiver 100. A recess 214a for drawing a lead from the voice coil 130 may be formed in the side wall 214.

Fig. 5 is a diagram illustrating a combination of a receiver and an air module of a receiver module having a pressure balancing structure according to an embodiment of the present disclosure. Referring to fig. 2 to 5, the injection-molded product part 220 is coupled to the metal part 210, and a pair of injection-molded product parts 220 are formed at positions facing each other, but the appearance of the injection-molded product part 220 may be changed according to the design of the housing 300. An air path 222 is formed in a portion of the injection-molded product part 220 that protrudes outward from the metal part 210. The air path 222 connects an upper space 314 formed between the upper housing 310 and the receiver 100 and a lower space 324 formed between the lower housing 320 and the air module 200.

Meanwhile, a portion of the injection-molded product part 220 is also coupled to the inner circumferential surface of the metal part 210, and a step 224 is formed at the portion coupled to the inner circumferential surface and serves to support the frame 110 of the receiver 100.

Meanwhile, since the sidewall 214 of the metal part 210 is formed to be spaced apart from the sidewall of the yoke 121 of the receiver 100, a back volume 230 is formed between the receiver 100 and the metal part 210.

The air module 200 forms a partition 226 separating upper and lower portions in the partial section, forming a duct section 240. Back volume 230 is in communication with back aperture 112 of receiver 100 and is used to amplify the sound of receiver 100. In addition, the duct section 240 implements a frequency tuning function to flatten the sound pressure in the entire frequency range, particularly by amplifying the sound pressure in the low frequency range. At this time, the tuning of the frequency through conduit section 240 can be easily adjusted by changing the length of the baffle 226 (i.e., the angle the baffle occupies in 360 °). Here, the spacer 226 is manufactured as an injection molded product, may be integrally formed with the injection molded product part 220, or the spacer 226 may be manufactured as a separate part and insert-injected when forming the injection molded product part 200.

In addition, the metal part 210 of the air module 200 includes a back volume communication hole (not shown) connecting the back volume 230 and the lower space 324 and a duct portion communication hole (not shown) connecting the duct portion 240 and the lower space 324.

Meanwhile, the receiver module may further include a microphone (not shown) for removing active noise. A microphone (not shown) may be located on a sound path including an air path so that external noise introduced through the vent hole 322 may be transferred to the microphone.

In addition, the air module 200 may be selectively applied in a manufacturing step of the receiver module. In addition, even existing receiver models can advantageously have a pressure equalization structure without changing the receiver structure once the air module 200 is installed outside the receiver.

Claims

1. A receiver module, comprising:

a housing including an upper housing having a sound insulation hole and a lower housing coupled to the upper housing and having a vent hole;

a receiver mounted in an internal space defined by the housing and having a frame, a magnetic circuit, a voice coil, and a diaphragm; and

an air module disposed to surround a lower surface and an outer circumference of the receiver, fixed to an inner circumference of the housing, and disposed to be mountable on the receiver such that an air path connecting the soundhole and the vent is selectively disposed between the outer circumference of the receiver and the inner circumference of the housing.

2. The receiver module of claim 1, wherein the air module further defines a back volume that amplifies sound by resonance at the outer circumference of the receiver.

3. The receiver module of claim 2, wherein the air module further comprises a duct portion formed in the back volume and having a communication hole communicating with an exterior outside the back volume.

4. The receiver module of claim 1, wherein the air module comprises a circular metal part surrounding the receiver and an injection molded part from which the metal part is insert-injected and which has the air path.

5. The receiver module of claim 1, further comprising:

a microphone for canceling active noise,

wherein the microphone is located on a sound path including the air path such that ambient noise introduced through the vent and through the air path is transferred to the microphone.

6. The receiver module of claim 1, wherein the air path connects an upper space formed between the upper housing and the receiver and a lower space formed between the lower housing and the air module.

7. The receiver module of any one of claims 1 to 6, wherein the magnetic circuit is mounted in the frame of the receiver and comprises a cylindrical yoke coupled to the frame, a permanent magnet attached to the yoke, and a top plate attached to an upper portion of the permanent magnet.

8. The receiver module of claim 7, wherein the air module is disposed below a frame of the receiver and has a sidewall formed to be spaced apart from a sidewall of a yoke of the receiver, and the air path is formed at a portion protruding outward from the sidewall of the air module.