CN112637747A

CN112637747A - Moving-iron telephone receiver and noise reduction earphone

Info

Publication number: CN112637747A
Application number: CN202011555477.8A
Authority: CN
Inventors: 周凯; 李梁
Original assignee: Suzhou Beisheng Acoustic Technology Co Ltd
Current assignee: Suzhou Beisheng Acoustic Technology Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-04-09

Abstract

The invention relates to a moving-iron telephone receiver, which comprises: a housing; the vibrating diaphragm is arranged in the shell and divides the shell into a front cavity and a rear cavity, and the front cavity is provided with a sound outlet hole; the vibration component is arranged in the rear cavity and used for generating vibration and transmitting the vibration to the vibrating diaphragm; the vibrating diaphragm fixing component is arranged in the shell, the vibrating diaphragm is fixed on the vibrating diaphragm fixing component, and a gap exists between the vibrating diaphragm fixing component and the side wall of the shell so as to communicate the front cavity with the rear cavity; the rear cavity is provided with a flow hole, and an air channel is formed between the sound outlet hole and the flow hole. A gap exists between the vibrating diaphragm fixing component and the side wall of the shell, the front cavity is communicated with the rear cavity, a flow hole is formed in the rear cavity, the flow hole is communicated with the sound outlet hole through the gap between the vibrating diaphragm fixing component and the side wall of the shell, an air channel is formed, the moving iron receiver can be communicated with the outside, and the air pressure of the front cavity and the air pressure of the rear cavity are balanced with the outside. And the mode of forming air holes on the vibrating diaphragm is not adopted, so that the sound production effect of the vibrating diaphragm is kept while the air pressure is balanced.

Description

Moving-iron telephone receiver and noise reduction earphone

Technical Field

The invention relates to the technical field of noise reduction earphones, in particular to a moving-iron telephone receiver and a noise reduction earphone.

Background

The traditional moving-iron telephone receiver needs to reserve air holes on a vibrating diaphragm, and has the main function of air pressure balance. The size of the air hole can directly influence the frequency response curve of the finished moving-iron telephone receiver, particularly the low-frequency part. The size of the air hole cannot be controlled to be very accurate in the production process, so the tolerance distribution of a low-frequency response curve of a common moving-iron receiver is +/-3 dB or even worse.

However, the technical requirement of the TWS headset with active noise reduction requires that the tolerance of the frequency response curve of the receiver is controlled to ± 1 dB. The scheme of forming the air holes in the diaphragm cannot meet the actual noise reduction requirement.

Disclosure of Invention

Accordingly, there is a need to provide a moving-iron receiver that does not have a hole on the diaphragm and can ensure air pressure balance.

A moving iron telephone receiver, comprising:

a housing;

the vibrating diaphragm is arranged in the shell and divides the shell into a front cavity and a rear cavity, and a sound outlet hole is formed in the front cavity;

the vibration component is arranged in the rear cavity and used for generating vibration and transmitting the vibration to the vibrating diaphragm;

the vibrating diaphragm fixing component is arranged in the shell, the vibrating diaphragm is fixed on the vibrating diaphragm fixing component, and a gap exists between the vibrating diaphragm fixing component and the side wall of the shell so as to enable the front cavity to be communicated with the rear cavity;

the rear cavity is provided with a flow hole, and an air channel is formed between the sound outlet hole and the flow hole.

According to the moving iron receiver, the vibrating diaphragm fixing component and the side wall of the shell are in clearance, the front cavity is communicated with the rear cavity, the flow hole is formed in the rear cavity, the flow hole is communicated with the sound outlet hole through the vibrating diaphragm fixing component and the side wall of the shell in clearance, the air channel is formed, the moving iron receiver can be communicated with the outside, and air pressure of the front cavity and air pressure of the rear cavity are balanced with the outside. And the mode of forming air holes on the vibrating diaphragm is not adopted, so that the sound production effect of the vibrating diaphragm is kept while the air pressure is balanced.

In one embodiment, the casing is in a strip shape, and has a sound outlet side wall and a connecting side wall corresponding to the sound outlet side wall in the length direction, and the sound outlet hole is formed in the sound outlet side wall.

In one embodiment, the diaphragm fixing assembly includes: establish first mounting and second mounting on the casing, the both ends of vibrating diaphragm are fixed respectively first mounting with on the second mounting, first mounting with there is the clearance between the sound lateral wall, and/or the second mounting with connect and have the clearance between the lateral wall.

In one embodiment, the flow orifice opens in the connecting sidewall.

A noise reduction earphone comprises an earphone front shell and the moving-iron telephone receiver arranged in the earphone front shell.

In one embodiment, the noise reducing headphone further comprises: the sealing element is annularly arranged on the moving iron receiver and is in sealing connection with the inner wall of the front shell of the earphone to divide the front shell of the earphone into a first cavity and a second cavity, wherein the sound outlet hole of the moving iron receiver is positioned in the first cavity, and the flow hole is positioned in the second cavity; the first cavity is provided with a first air hole, the second cavity is provided with a second air hole, and the first air hole and the second air hole are communicated with an air passage of the moving-iron telephone receiver.

In one embodiment, the earphone front case comprises: the sealing piece is arranged between the moving iron telephone receiver and the shell body, and one side of the moving iron telephone receiver, which is provided with the sound outlet, enters the sound outlet.

In one embodiment, the sound emitting head has: the sound outlet hole on the moving-iron receiver faces the sound outlet wall, and an earphone sound outlet opposite to the sound outlet is formed in the sound outlet wall; the first air holes are formed in the side wall.

In one embodiment, the second vent hole is opposite to the flow hole of the moving-iron receiver.

In one embodiment, the sealing element is a sealing colloid sealed between the moving-iron receiver and the inner wall of the front shell of the earphone.

Drawings

Fig. 1 is a schematic structural diagram of a moving-iron telephone receiver in an embodiment;

fig. 2 is a schematic structural diagram of a noise reduction headphone in an embodiment.

Wherein: 100. a housing; 110. a front cavity; 111. a sound outlet hole; 120. a rear cavity; 121. a flow orifice; 200. vibrating diaphragm; 300. a vibration assembly; 400. a diaphragm fixing component; 500. a seal member; 600. an earphone front shell; 610. a sound outlet head; 611. an earphone sound outlet; 620. a first cavity; 630. a second cavity; 640. a first air vent; 650. and a second air hole.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, fig. 1 shows a moving-iron receiver for converting an electrical signal into an acoustic signal according to an embodiment of the present invention, including: the case 100, the diaphragm 200, the vibration assembly 300, and the diaphragm 200 fixing assembly. Wherein the diaphragm 200, the vibration assembly 300 and the diaphragm 200 fixing assembly are all disposed in the housing 100. The vibration component 300 is used for receiving an electrical signal and generating vibration, and transmitting the vibration to the diaphragm 200 to achieve a sound production effect.

The diaphragm 200 is transversely disposed on the housing 100, and divides the housing 100 into a front cavity 110 and a rear cavity 120, the vibration assembly 300 is disposed in the rear cavity 120, and the front cavity 110 is a hollow cavity. The vibration component 300 is connected to an external circuit through the casing 100, and the vibration component 300 receives an external electrical signal, vibrates after receiving the electrical signal, and transmits the vibration to the diaphragm 200, thereby achieving an effect of converting the electrical signal into an acoustic signal. The casing 100 has a sound hole 111 opened in the front cavity 110, and sound generated from the diaphragm 200 is transmitted to the outside through the sound hole 111. However, the sound generated from the sound output hole 111 causes an imbalance in air pressure in the front chamber 110 and the back chamber 120, which easily causes the diaphragm 200 to deform, resulting in distortion of sound or failure to generate sound. In the prior art, a method of forming air holes on the diaphragm 200 is generally adopted to balance the air pressures of the front cavity 110 and the back cavity 120, so as to prevent the diaphragm 200 from deforming. However, the sound effect of the diaphragm 200 is affected by the manner of forming the air holes. The moving-iron telephone receiver in this embodiment further includes: the vibrating diaphragm 200 fixing component is arranged in the shell 100 and used for fixing the vibrating diaphragm 200, a gap exists between the vibrating diaphragm 200 fixing component and the side wall of the shell 100 to communicate the front cavity 110 with the rear cavity 120, the rear cavity 120 is provided with a flow hole 121, the flow hole 121 is communicated with the sound outlet hole 111 through the gap between the vibrating diaphragm 200 fixing component and the side wall of the shell 100 to form a gas passing channel, so that the moving iron receiver can be communicated with the outside, and the air pressure of the front cavity 110 and the air pressure of the rear cavity 120 are balanced with the outside. Instead of opening air holes on the diaphragm 200, the sound production effect of the diaphragm 200 is maintained while the air pressure is balanced.

In this embodiment, the casing 100 is disposed in a bar shape, the casing 100 has a sound outlet side wall and a connection side wall corresponding to the sound outlet side wall in the length direction, the connection side wall is provided with a pad for connecting with an external circuit component, the sound outlet hole 111 is provided in the sound outlet side wall, in other embodiments, the sound outlet hole 111 may also be provided in another side wall close to the sound outlet side wall, and the sound outlet hole 111 is provided in the sound outlet side wall, so that the moving-iron receiver can be disposed in the earphone in a long and narrow manner, thereby reducing the size of the whole earphone. The flow hole 121 may be formed at any position on the rear cavity 120, and preferably, the flow hole 121 is formed on the connecting side wall, and is connected with the circuit at the connecting side wall, so that the flow hole is not blocked by the side wall of the earphone, and the installation is convenient.

Wherein the fixed subassembly of diaphragm 200 includes: the first fixing member 410 and the second fixing member 420 are disposed on the casing 100, two ends of the diaphragm 200 are respectively fixed on the first fixing member 410 and the second fixing member 420, the first fixing member 410 and the second fixing member 420 are transversely disposed in the casing 100 to support and fix the diaphragm 200, the first fixing member 410 and the second fixing member 420 are disposed above the diaphragm 200 or below the diaphragm 200, or disposed on two sides of the diaphragm 200, respectively, and only the diaphragm 200 is fixed in the casing 100, wherein the first fixing member 410 is disposed close to the sound outlet sidewall, the second fixing member 420 is disposed close to the connecting sidewall, a gap exists between the first fixing member 410 and the sound outlet sidewall, and/or a gap exists between the second fixing member 420 and the connecting sidewall, so that a gap exists between the fixing component of the diaphragm 200 and the sidewall of the casing 100 to communicate the front cavity 110 with the rear cavity 120, and both the front cavity 110 and the rear cavity 120 communicate with the outside air.

Specifically, the casing 100 is a rectangular parallelepiped, and includes two first sidewalls disposed along the X axis, two second sidewalls disposed along the Y axis, and a sound outlet sidewall and a connection sidewall disposed along the Z axis, the diaphragm 200 is disposed along the X axis, and is disposed between the two first sidewalls in parallel, the first fixing member 410 and the second fixing member 420 are respectively disposed on the two second sidewalls, and are disposed along the X axis in parallel with the diaphragm 200, and the diaphragm 200 is fixed above the first fixing member 410 and the second fixing member 420 in this embodiment. The first fixing member 410 and the second fixing member 420 receive and mount the diaphragm 200, a gap exists between the first fixing member 410 and the sound output sidewall, a gap also exists between the second fixing member 420 and the connecting sidewall, the two gaps communicate the front cavity 110 and the rear cavity 120, and the efficiency of air circulation is improved.

In the moving-iron receiver in this embodiment, through the arrangement of the fixing component of the vibrating diaphragm 200, when the vibrating diaphragm 200 is installed, a gap is left between the vibrating diaphragm 200, the fixing component of the vibrating diaphragm 200, and the casing 100, so that the front cavity 110 and the rear cavity 120 of the casing 100 are communicated, and an air passage is formed between the sound receiving hole and the flow hole 121, thereby facilitating the air pressure balance inside the moving-iron receiver. Meanwhile, the vibrating diaphragm 200 is not damaged, and the sound production effect is ensured.

The second embodiment of the present application discloses a noise reduction earphone, which comprises an earphone front shell 600, and a moving-iron receiver arranged in the earphone front shell 600 as in the first embodiment, wherein the noise reduction earphone requires that the tolerance of the frequency response curve of the receiver is controlled within ± 1dB, and the sound scheme of the diaphragm 200 in the first embodiment can meet the above requirements.

The noise reducing headphone further comprises: the sealing element 500 is annularly arranged on the moving-iron telephone receiver and is in sealing connection with the inner wall of the front earphone casing 600, the moving-iron telephone receiver is fixed on the front earphone casing 600 by the sealing element 500, and the sealing element 500 is sealed with the inner wall of the front earphone casing 600. The sealing colloid seals and fixes the moving-iron telephone receiver and the earphone front shell 600, and simultaneously divides the earphone front shell 600 into a first cavity 620 and a second cavity 630, one part of the moving-iron telephone receiver is positioned in the first cavity 620, the other part of the moving-iron telephone receiver is positioned in the second cavity 630, wherein the sound outlet hole 111 is positioned in the first cavity 620, the flow hole 121 is positioned in the second cavity 630, the earphone front shell 600 is provided with a first air vent 640 on the first cavity 620, the second cavity 630 is provided with a second air vent 650, the first air vent 640 and the sound outlet hole 111 are positioned in the first cavity 620, so that the sound outlet hole 111 is communicated with air outside the earphone; the second vent 650 and the flow hole 121 are located in the second cavity 630, so that the flow hole 121 is communicated with the air outside the earphone, obviously, the first vent 640 and the second vent 650 are communicated through the air channel of the moving-iron receiver, and the air pressure inside the front case 600 of the earphone and the moving-iron receiver can be kept balanced. The sealing colloid can prevent the first air hole 640 and the second air hole 650 from being directly communicated, and the air exchange efficiency between the moving-iron telephone receiver and the external air is reduced.

The earphone front case 600 includes: the movable iron telephone receiver comprises a shell body and a sound outlet head 610 connected with the shell body, wherein the sound outlet head 610 protrudes out of the shell body, one side, provided with a sound outlet side wall, of the movable iron telephone receiver is arranged towards the sound outlet head 610, a sealing element 500 is sealed between the shell body and the movable iron telephone receiver, a first cavity 620 is formed by part of the inner wall of the shell body and the sound outlet head 610, a second cavity 630 is formed by the inner wall of the shell body, the sound outlet side wall of the movable iron telephone receiver is located in the first cavity 620, and a connecting side wall is located in the second cavity 630. The sound emitting head 610 has: the sound outlet wall and the side wall connected with the sound outlet wall are arranged, the sound outlet hole 111 on the moving-iron receiver faces the sound outlet wall, the sound outlet wall is provided with an earphone sound outlet 611 opposite to the sound outlet, after sound is generated in the sound outlet hole 111 of the moving-iron receiver, the sound can be directly transmitted to the outside of the sound outlet 610 through the earphone sound outlet 611, the sound generated by the moving-iron receiver is transmitted linearly, and the sound loss is small. The first air hole 640 is formed in the side wall, the sound outlet effect of the sound outlet 611 of the earphone is not affected when the first air hole 640 is formed in the side wall, and meanwhile, the first air hole 640 can be closer to the sound outlet 111 of the moving-iron telephone receiver, so that the sound outlet 111 can be better communicated with the outside air.

The second vent 650 is formed at a portion of the case body in the second cavity 630, wherein the second vent 650 is located at a middle portion of the second cavity 630 and is close to a connecting sidewall of the moving-iron receiver, and the flow hole 121 is formed at a bottom portion of the connecting sidewall, so that the second vent 650 is opposite to the flow hole 121, and a distance between the second vent 650 and the flow hole 121 is minimized, so that the flow hole 121 can be better communicated with the outside air.

In the noise reduction earphone of the embodiment, the front casing 600 of the earphone is divided into the first cavity 620 and the second cavity 630 by the sealing colloid, and when the noise reduction earphone is in practical use, the moving-iron receiver and the front casing 600 of the earphone are both communicated with air, so that the balance of internal and external air pressures can be kept on the premise that the opening is not formed in the vibrating diaphragm 200 in the moving-iron receiver, and meanwhile, the sound production and noise reduction effects are kept.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A moving-iron telephone receiver, comprising:

a housing;

2. The moving-iron telephone receiver according to claim 1, wherein the housing is bar-shaped and has a sound-emitting sidewall and a connecting sidewall corresponding to the sound-emitting sidewall in a length direction, and the sound-emitting hole is formed in the sound-emitting sidewall.

3. The moving iron receiver of claim 1, wherein the diaphragm fixing assembly comprises: establish first mounting and second mounting on the casing, the both ends of vibrating diaphragm are fixed respectively first mounting with on the second mounting, first mounting with there is the clearance between the sound lateral wall, and/or the second mounting with connect and have the clearance between the lateral wall.

4. The moving iron receiver of claim 2 wherein said flow orifice is formed in said connecting sidewall.

5. A noise reducing headset comprising a headset front housing, a moving iron receiver according to any of claims 1 to 4 provided in the headset front housing.

6. The noise reducing headset of claim 5, further comprising: the sealing element is annularly arranged on the moving iron receiver and is in sealing connection with the inner wall of the front shell of the earphone to divide the front shell of the earphone into a first cavity and a second cavity, wherein the sound outlet hole of the moving iron receiver is positioned in the first cavity, and the flow hole is positioned in the second cavity;

the first cavity is provided with a first air hole, the second cavity is provided with a second air hole, and the first air hole and the second air hole are communicated with an air passage of the moving-iron telephone receiver.

7. The noise reducing headset of claim 5, wherein the headset front housing comprises: the sealing piece is arranged between the moving iron telephone receiver and the shell body, and one side of the moving iron telephone receiver, which is provided with the sound outlet, enters the sound outlet.

8. The noise reducing headset of claim 7, wherein the sound outlet head has: the sound outlet hole on the moving-iron receiver faces the sound outlet wall, and an earphone sound outlet opposite to the sound outlet is formed in the sound outlet wall; the first air holes are formed in the side wall.

9. The noise reducing earphone according to claim 5, wherein the second vent is opposite to the flow hole of the moving-iron receiver.

10. The noise reducing earphone according to claim 5, wherein the sealing member is a sealing gel sealed between the moving-iron receiver and the inner wall of the earphone front shell.