Receiver module with pressure balance structure

Abstract

A receiver module is disclosed, comprising: a shell, the shell comprising an upper shell having a sound insulation hole and a lower shell connected to the upper shell and having a vent hole; a receiver, the receiver is installed in an internal space defined by the shell and has a frame, a magnetic circuit, a voice coil and a diaphragm; and an air module, the air module is arranged to surround the lower surface and outer circumference of the receiver, is fixed to the inner circumference of the shell, and has an air path connecting the sound insulation hole and the vent hole.

Description

Technical Field

[0001] The present disclosure relates to a receiver module having a pressure balancing structure. Background Art

[0002] Headphones are divided into closed-type headphones and open-type headphones. In closed-type headphones, except for the sound emission hole inserted into the ear canal, the rest of the headphone is blocked, while open-type headphones include tuning holes and pipes in addition to the sound emission hole.

[0003] Closed-type headphones transmit sound from a receiver installed in the headphones directly to the user's ears, allowing the user to hear the sound even at low power, and in particular, ear canal headphones inserted into the user's ears through earpieces have the advantage of excellent sound insulation to block ambient noise.

[0004] However, in the case of an ear canal earphone, since the ear canal is completely sealed, an atmospheric pressure difference occurs between the inside and outside of the ear canal, and thus the ear may be soundproofed or may cause discomfort to some people. Korean Patent Registration No. 10-1558091 discloses an ear canal earphone including a pressure balancing device to improve the pressure difference.

[0005] Figure 1 1 is a view showing an ear 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 the outer surface of a tube 25 integrally formed on the 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 that vibrates up and down by the 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 to the front. In addition, a through hole 19a is provided at the center of the bracket 19 to discharge the sound generated in the diaphragm 13 to the rear. In addition, a through hole 16a is provided at the center of the yoke 16 to emit the sound generated in the diaphragm 13 to the rear.

[0006] 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 the sound emitted from the speaker unit 10.

[0007] A pressure balancing device for discharging air existing in front of a speaker unit 10 to the rear of the speaker unit 10 to eliminate the pressure difference between the ear canal of the user and the ambient air is provided. The pressure balancing device of the earphone according to the related art includes: a lateral air channel 50 for discharging air in the interior A of the tube 25 or air in the interior B of the speaker unit 10 to the side surface C of the gasket 30 or the side surface D of the speaker unit 10; and a rearward air channel 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.

[0008] However, in the case of an ear canal earphone, if the ear canal is not completely sealed when worn, the sound pressure in the low frequency range is inevitably reduced. Therefore, it is necessary to develop a structure that can compensate for the reduction in sound pressure in the low frequency range while improving the sound insulation of the ear canal earphone by providing an air passage.

[0009] [Related technical literature]

[0010] [Patent Document]

[0011] (Patent Document 1) Korean Patent Registration No. 10-1558091 Summary of the invention

[0012]

Technical issues

[0013] Therefore, an object of the present disclosure is to provide a receiver module including an air module that can be installed outside a receiver as a pressure balancing structure without changing the structure of the receiver.

[0014]

Technical Solution

[0015] According to aspects of the present disclosure, there is provided a receiver module, comprising: a shell, the shell comprising an upper shell having a sound insulation hole and a lower shell connected to the upper shell and having a vent hole; a receiver, the receiver being installed in an internal space defined by the shell and having a frame, a magnetic circuit, a voice coil and a diaphragm; and an air module, the air module being arranged to surround the lower surface and outer circumference of the receiver, being fixed to the inner circumference of the shell, and being arranged to be able to be installed on the receiver so that an air path connecting the sound insulation hole and the vent hole is selectively arranged between the outer circumference of the receiver and the inner circumference of the shell.

[0016] Additionally, as another example of the present disclosure, the air module may further define a back volume that amplifies sound through resonance at an outer circumference of the receiver.

[0017] 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 the outside outside the back volume.

[0018] In addition, 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.

[0019] In addition, as another example of the present invention, the receiver module may further include: a microphone for eliminating active noise, wherein the microphone is located on the sound path of the noise introduced through the air path, so that the ambient noise introduced through the vent and through the air path is transmitted to the microphone.

[0020] In addition, as another example of the present disclosure, an air path can connect an upper space formed between an upper shell and a receiver and a lower space formed between a lower shell and an air module, and a magnetic circuit is installed in a frame of the receiver, wherein the magnetic circuit includes a cylindrical yoke connected 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 can be disposed below the receiver frame, having a side wall formed to be spaced apart from a side wall of the yoke of the receiver, and the air path is formed at a portion protruding outward from the side wall of the air module.

[0021] Since the receiver module provided by the present disclosure includes an air module having an air path connecting the upper space of the receiver and the lower space of the receiver, the air pressure difference between the inside and the outside of the ear canal is improved.

[0022] In addition, in the receiver module provided by the present disclosure, the pressure balancing 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a view showing an ear canal earphone including a pressure balancing device according to the related art;

[0024] Figure 2 is a cross-sectional view of a receiver module having a pressure balancing structure according to an embodiment of the present disclosure;

[0025] Figure 3 is a receiver disposed in a receiver module having a pressure balancing structure according to an embodiment of the present disclosure;

[0026] Figure 4is a view showing an air module of a receiver module having a pressure balancing structure according to an embodiment of the present disclosure; and

[0027] Figure 5 is a view showing a state in which a receiver and an air module of a receiver module having a pressure balance structure according to an embodiment of the present disclosure are combined. DETAILED DESCRIPTION

[0028] Hereinafter, the present disclosure will be described in more detail with reference to the accompanying drawings.

[0029] Figure 2 is a cross-sectional view of a receiver module having a pressure balancing structure according to an embodiment of the present disclosure.

[0030] The receiver module according to an embodiment of the present disclosure includes a receiver 100, an air module 200 coupled to the outside of the receiver 100, and a housing 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 a soundproof hole 312 and a lower housing 320 coupled to the upper housing 310 and having a vent hole 322. There are spaces 314 and 324 between the upper housing 310 and the receiver 100 and between the lower housing 320 and the air module 200, through which air can flow.

[0031] Figure 3 A receiver is provided in a receiver module having a pressure balancing structure according to an embodiment of the present disclosure.

[0032] The receiver 100 includes a frame 110 for fixing 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 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 of the voice coil 130 is attached to the diaphragm 140. The diaphragm 140 is placed on the frame 110, and a seat ring 142 formed of an injection-molded product component having a greater thickness and rigidity than the diaphragm 140 may be attached to the outer circumference of the diaphragm 140 to help with placement.

[0033] Meanwhile, a back hole 112 may be formed in the frame 110 so that the diaphragm 140 may vibrate smoothly.

[0034] Figure 42 is a view showing an air module of a receiver module having a pressure balance structure according to an embodiment of the present disclosure. The air module 200 is coupled to the lower side of the frame 110 of the receiver 100 and has a generally cylindrical shape. The air module 200 includes a generally cylindrical metal component 210 formed of a SUS material and an injection-molded product component 220, from which the metal component 210 is insert-injected. The metal component 210 includes a lower surface 212 in contact with the lower surface of the yoke 121 of the receiver 100 and a side wall 214 spaced apart from the side wall of the yoke 121 of the receiver 100. A recess 214a for leading out a lead wire from the voice coil 130 may be formed in the side wall 214.

[0035] Figure 5 is a diagram illustrating a combination of a receiver and an air module of a receiver module having a pressure balance structure according to an embodiment of the present disclosure. Figures 2 to 5 , the injection molded product part 220 is coupled to the metal part 210, and a pair of the 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 protruding 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.

[0036] Meanwhile, a portion of the injection-molded product component 220 is also coupled to the inner peripheral surface of the metal component 210 , and a step 224 is formed at the portion coupled to the inner peripheral surface and serves to support the frame 110 of the receiver 100 .

[0037] Meanwhile, since the side wall 214 of the metal component 210 is formed to be spaced apart from the side wall of the yoke 121 of the receiver 100 , a back volume 230 is formed between the receiver 100 and the metal component 210 .

[0038] The air module 200 forms a baffle 226 that separates the upper and lower parts in the local section, thereby forming a duct portion 240. The back volume 230 is connected to the back hole 112 of the receiver 100 and is used to amplify the sound of the receiver 100. In addition, the duct portion 240 implements a frequency tuning function to flatten the sound pressure in the entire frequency range, especially by amplifying the sound pressure in the low frequency range. At this time, by changing the length of the baffle 226 (that is, the angle occupied by the baffle in 360°), the frequency tuning passing through the duct portion 240 can be easily adjusted. Here, the baffle 226 is manufactured as an injection molded product, which can be formed integrally with the injection molded product component 220, or the baffle 226 can be manufactured as a separate component and inserted-injected when forming the injection molded product component 200.

[0039] In addition, the metal component 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 .

[0040] Meanwhile, the receiver module may further include a microphone (not shown) for canceling active noise. The 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.

[0041] In addition, the air module 200 can be selectively applied in the manufacturing step of the receiver module. In addition, once the air module 200 is installed outside the receiver, even the existing receiver model can advantageously have a pressure balance structure without changing the structure of the receiver.

Claims

1. A receiver module, comprising: A housing, the housing comprising an upper housing having a sound insulation hole and a lower housing coupled to the upper housing and having a vent hole; a receiver installed in an internal space defined by the housing and having a frame, a magnetic circuit, a voice coil, and a diaphragm; as well as An air module is arranged to surround the lower surface and outer circumference of the receiver, fixed to the inner circumference of the shell, and arranged to be able to be installed on the receiver so that an air path connecting the sound insulation hole and the vent hole is selectively arranged between the outer circumference of the receiver and the inner circumference of the shell.

2. The receiver module according to claim 1, wherein: The air module also defines a back volume that amplifies sound through resonance at the outer circumference of the receiver.

3. The receiver module according to claim 2, wherein: The air module further includes a duct portion formed in the back volume and having a communication hole communicating with the outside outside the back volume.

4. The receiver module according to claim 1, wherein: The air module includes 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 according to claim 1, further comprising: a microphone, the microphone being configured to cancel active noise, The microphone is located on a sound path including the air path, so that the ambient noise introduced through the vent and through the air path is transmitted to the microphone.

6. The receiver module according to claim 1, wherein: The air path connects an upper space formed between the upper case and the receiver and a lower space formed between the lower case and the air module.

7. The receiver module according to any one of claims 1 to 6, wherein: The magnetic circuit is installed in the frame of the receiver, and 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.

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

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