Anti-feedback structure of dynamic microphone

Abstract

This invention discloses an anti-feedback structure for a dynamic microphone, comprising a housing assembly. A microphone unit and a speaker unit are respectively disposed at both ends of the housing assembly, and the microphone unit and speaker unit are electrically connected. A buffer ring, made of porous soft rubber, is disposed around the microphone unit and is fixedly fitted to the housing assembly. Several through holes are provided in the housing assembly, penetrating the housing assembly and surrounding the microphone unit. This application, by providing a buffer ring around the microphone unit and through holes in the housing assembly surrounding the microphone unit, effectively forms a multiple anti-feedback structure for the microphone unit in sound reception mode, effectively cutting off the sound wave feedback path, significantly reducing or even eliminating feedback, and ensuring high-fidelity sound transmission.

Description

Technical Field

[0001] This invention relates to the field of microphones, and more specifically to an anti-feedback structure for a dynamic microphone. Background Technology

[0002] In portable karaoke speakers, megaphones, and other integrated audio devices, the microphone and speaker are integrated into the same compact cavity, making them highly susceptible to acoustic feedback (howling). Existing technologies mostly rely on software DSP noise reduction or simple sound insulation materials, which have the following drawbacks: limited physical sound insulation: traditional sound insulation materials cannot completely block high-frequency sound waves, and howling is still likely at high volumes; degraded sound quality: excessive DSP processing or sound insulation can lose sound details, resulting in muffled vocals; poor structural stability: the filling material is prone to displacement, leading to unstable anti-howling performance. Therefore, designing a dynamic microphone assembly that fundamentally solves the acoustic feedback problem structurally is crucial for improving the user experience of integrated megaphones. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides an anti-feedback structure for a dynamic microphone, comprising a housing assembly, with a microphone unit and a speaker unit respectively disposed at both ends of the housing assembly, the microphone unit and the speaker unit being electrically connected, a buffer ring disposed around the microphone unit, the buffer ring being made of porous soft rubber, the buffer ring being fixedly fitted to the housing assembly, and a plurality of through holes being disposed in the housing assembly, the through holes penetrating the housing assembly and surrounding the microphone unit.

[0004] Furthermore, a limiting ring groove is provided on the inner wall of one end of the housing assembly, and when the microphone unit is assembled with the housing assembly, the buffer ring is embedded in the limiting ring groove.

[0005] Furthermore, a plurality of positioning blocks are provided protruding outward along the circumference of the outer ring of the buffer ring, and a positioning groove that can cooperate with the positioning blocks is provided in the limiting ring groove. When the microphone unit is assembled with the housing assembly, the positioning blocks are inserted into the positioning groove.

[0006] Furthermore, the microphone unit includes a microphone receiving section and a connecting section, and the buffer ring is disposed between the microphone receiving section and the connecting section. When the microphone unit is assembled with the housing assembly, the microphone receiving section extends from one end of the housing assembly, and the connecting section is located inside the housing assembly.

[0007] Furthermore, the housing assembly is composed of a first housing and a second housing, both of which have semi-circular cross-sections. The housing assembly is formed by splicing the first housing and the second housing from left to right, and threaded holes are correspondingly provided on the cross-sections of the first housing and the second housing.

[0008] Furthermore, a stainless steel ring is provided on the side of the connection portion away from the receiver portion, and a limiting rod is provided on the inner wall of the first housing. The limiting rod is inserted into the stainless steel ring and the two are loosely fitted.

[0009] Furthermore, the through hole surrounds the connection portion.

[0010] Furthermore, the diameter of the through hole is 1 mm to 3.5 mm, and the total opening area of ​​the through hole accounts for 5% to 10% of the side wall surface area of ​​the housing assembly.

[0011] Furthermore, a control circuit board is disposed in the first housing, and a battery is disposed in the second housing. The battery and the control circuit board are electrically connected, and the control circuit board is electrically connected to the microphone unit and the speaker unit, respectively.

[0012] Compared with the prior art, the beneficial effects of the present invention are: This application provides a buffer ring around the microphone unit and through holes around the microphone unit in the housing assembly, so that the microphone unit can effectively form a multi-layer anti-feedback structure when recording sound, effectively cutting off the sound wave feedback path, greatly reducing or even eliminating feedback, and ensuring high-fidelity sound transmission.

[0013] Additional aspects and advantages of the invention will be set forth in the description which follows, and in some respects will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the assembly of the housing assembly and the microphone unit of the present invention; Figure 3 This is an exploded view of the present invention.

[0016] The reference numerals and names in the figure are as follows: The components include: housing assembly 100, microphone unit 200, speaker unit 300, buffer ring 210, through hole 110, limiting ring groove 120, positioning block 211, positioning groove 121, sound receiving part 220, connecting part 230, first housing 130, second housing 140, threaded hole 131, stainless steel ring 240, limiting rod 141, control circuit board 132, and battery 142. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The present invention will now be described in more detail. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them.

[0019] In the description of this invention, it should be noted that directional terms such as "front," "rear," "up," "down," "left," "right," "horizontal," "vertical," "horizontal," and "top," "bottom," etc., indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner or outer contours of each component itself. In the description of this invention, it should be noted that the use of terms such as "first" and "second" to define components is merely for the convenience of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0020] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0021] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0022] The preferred embodiments of the present invention will now be further described with reference to the accompanying drawings. Figure 1 , Figure 2 and Figure 3 As shown, an anti-feedback structure for a dynamic microphone includes a housing assembly 100. A microphone unit 200 and a speaker unit 300 are respectively disposed at both ends of the housing assembly 100. The microphone unit 200 and the speaker unit 300 are electrically connected. A buffer ring 210 is disposed around the microphone unit 200. The buffer ring 210 is made of porous soft rubber and is fixed to the housing assembly 100. A plurality of through holes 110 are provided in the housing assembly 100. The through holes 110 penetrate the housing assembly 100 and are disposed around the microphone unit 200.

[0023] This application is mainly applied to a microphone product, especially suitable for microphone products integrated with portable karaoke speakers or amplifiers. In the embodiments of this application, it has a housing assembly 100, a microphone unit 200 and a speaker unit 300, wherein the microphone unit 200 and the speaker unit 300 are located at opposite ends of the housing assembly 100. The housing assembly 100 partially encloses and fixes the microphone unit 200 and the speaker unit 300. The microphone unit 200 is used to pick up sound and convert audio into electrical signals, and the speaker unit 300 is used to receive electrical signals, amplify them, and then convert them into sound waves.

[0024] A buffer ring 210 is provided around the microphone unit 200. The buffer ring 210 is made of a porous soft rubber material, preferably silicone. The inner ring of the buffer ring 210 is fixed to the microphone unit 200, and the outer ring is fixed to the housing assembly 100, so that the microphone unit 200 is suspended in the housing assembly 100. When the microphone unit 200 is in the recording state, due to the material of the buffer ring 210, the microphone unit 200 can reduce the vibration in the housing assembly 100, thereby reducing the sound feedback (howling) caused by the vibration in the housing. In addition, since the microphone unit 200 will drive the air in the housing assembly 100 to vibrate at the same frequency when the microphone unit 200 is in the recording state, by providing a number of through holes 110 around the microphone unit 200 on the housing assembly 100, the housing assembly 100 can form an open space, which enhances the air circulation inside the housing assembly 100, which is equivalent to deforming and extending the sound guide channel, forming a structure similar to an "acoustic maze", thereby further suppressing the generation of howling.

[0025] Compared with the prior art, this application provides a buffer ring 210 around the microphone unit 200 and a through hole 110 around the microphone unit 200 in the housing assembly 100, so that the microphone unit 200 can effectively form a multiple anti-feedback structure when recording sound, effectively cut off the sound wave feedback path, greatly reduce or even eliminate feedback, and ensure high-fidelity sound transmission.

[0026] Furthermore, based on the above embodiments, a limiting ring groove 120 is provided on the inner wall of one end of the housing assembly 100. When the microphone unit 200 is assembled with the housing assembly 100, the buffer ring 210 is embedded in the limiting ring groove 120. This suspends and fixes the microphone unit 200 within the housing assembly 100. Since the microphone unit 200 vibrates during sound reception, it causes the buffer ring 210 to vibrate as well. Because the buffer ring 210 is made of porous soft rubber, it effectively cushions the vibration of the microphone unit 200, thereby reducing vibration to the housing assembly 100 and the air within it.

[0027] Furthermore, based on the above embodiment, a plurality of positioning blocks 211 are provided protruding outward along the circumference of the outer ring of the buffer ring 210. A positioning groove 121 is provided within the limiting ring groove 120 to cooperate with the positioning blocks 211. When the microphone unit 200 is assembled with the housing assembly 100, the positioning blocks 211 are inserted into the positioning grooves 121. This prevents the microphone unit 200 from rotating within the housing assembly 100, which could cause problems with the electrical connection at the rear end, further improving the stability of the connection between the microphone unit 200 and the housing assembly 100.

[0028] Further, based on the above embodiment, the microphone unit 200 includes a microphone receiving section 220 and a connecting section 230. A buffer ring 210 is disposed between the microphone receiving section 220 and the connecting section 230. When the microphone unit 200 is assembled with the housing assembly 100, the microphone receiving section 220 extends from one end of the housing assembly 100, and the connecting section 230 is located inside the housing assembly 100. Thus, when the microphone receiving section 220 vibrates, the vibration is first buffered by the buffer ring 210 before being transmitted to the connecting section 230. Therefore, the vibration received by the connecting section 230, located inside the housing assembly 100, is very small.

[0029] Further, based on the above embodiments, the housing assembly 100 is composed of a first housing 130 and a second housing 140. Both the first housing 130 and the second housing 140 have semi-circular cross-sections. The housing assembly 100 is formed by joining the first housing 130 and the second housing 140 together. Threaded holes 131 are correspondingly provided on the cross-sections of the first housing 130 and the second housing 140. When the threaded holes 131 on the cross-sections of the first housing 130 and the second housing 140 need to be joined, a screw can be inserted. The reason for designing the housing assembly 100 as a separate unit is that only with a separate design can the positioning block 211 be accurately inserted into the positioning groove 121 during the production process.

[0030] Furthermore, based on the above embodiment, a stainless steel ring 240 is provided on the side of the connecting portion 230 away from the sound receiving portion 220. A limiting rod 141 is provided on the inner wall of the first housing 130. The limiting rod 141 is inserted into the stainless steel ring 240, and the two are loosely fitted. By providing a stainless steel ring 240 at the rear end of the microphone unit 200 and inserting the limiting rod 141 of the first housing 130 into it, the structural stability of the connection between the microphone unit 200 and the housing assembly 100 is further enhanced, preventing the microphone unit 200 from falling off the housing assembly 100.

[0031] Furthermore, based on the above embodiment, the through hole 110 surrounds the connecting portion 230. Thus, when the receiver 220 vibrates, the vibration is first buffered by the buffer ring 210 before being transmitted to the connecting portion 230. At this point, the vibration on the connecting portion 230 has been suppressed for the first time. Then, the vibration of the connecting portion 230 will cause the air inside the housing assembly 100 to vibrate. The through hole 110 forms an open space, enhancing the airflow inside the housing assembly 100, effectively deforming and lengthening the sound guide channel, thereby further suppressing howling.

[0032] Furthermore, based on the above embodiments, the diameter of the through hole 110 is 1 mm to 3.5 mm, and the total opening area of ​​the through hole 110 accounts for 5% to 10% of the side wall surface area of ​​the housing assembly 100. With the above dimensions, the through hole 110 can better enhance the airflow inside the housing assembly 100, thereby achieving the best effect in suppressing whistling.

[0033] Furthermore, based on the above embodiments, a control circuit board 132 is disposed within the first housing 130, and a battery 142 is disposed within the second housing 140. The battery 142 and the control circuit board 132 are electrically connected, and the control circuit board 132 is electrically connected to the microphone unit 200 and the speaker unit 300, respectively. The battery 142 provides power to the control circuit board 132, the microphone unit 200, and the speaker unit 300, and the control circuit board 132 sends corresponding control signals to the microphone unit 200 and the speaker unit 300. This principle is existing conventional technology and will not be elaborated further here.

[0034] The details of the exemplary embodiments described above are provided, and the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention.

Claims

1. An anti-feedback structure for a dynamic microphone, characterized in that, The device includes a housing assembly (100), with a microphone unit (200) and a speaker unit (300) respectively provided at both ends of the housing assembly (100). A buffer ring (210) is provided around the microphone unit (200). The buffer ring (210) is made of porous silicone and is fixed to the housing assembly (100). The housing assembly (100) is provided with a plurality of through holes (110), which penetrate the housing assembly (100) and surround the microphone unit (200).

2. The anti-feedback structure of the dynamic microphone according to claim 1, characterized in that, One end of the housing assembly (100) is provided with a limiting ring groove (120). When the microphone unit (200) is assembled with the housing assembly (100), the buffer ring (210) is embedded in the limiting ring groove (120).

3. The anti-feedback structure of the dynamic microphone according to claim 2, characterized in that, A plurality of positioning blocks (211) are provided protruding outward along the circumference of the outer ring of the buffer ring (210). A positioning groove (121) that can cooperate with the positioning blocks (211) is provided in the limiting ring groove (120). When the microphone unit (200) is assembled with the housing assembly (100), the positioning block (211) is inserted into the positioning groove (121).

4. The anti-feedback structure of the dynamic microphone according to claim 1, characterized in that, The microphone unit (200) includes a microphone section (220) and a connecting section (230). The buffer ring (210) is disposed between the microphone section (220) and the connecting section (230). When the microphone unit (200) is assembled with the housing assembly (100), the microphone section (220) extends from one end of the housing assembly (100), and the connecting section (230) is located inside the housing assembly (100).

5. The anti-feedback structure of the dynamic microphone according to claim 4, characterized in that, The housing assembly (100) is composed of a first housing (130) and a second housing (140). The cross-sections of the first housing (130) and the second housing (140) are both semi-circular. The housing assembly (100) is formed by splicing the first housing (130) and the second housing (140) from left to right. Threaded holes (131) are correspondingly provided on the cross-sections of the first housing (130) and the second housing (140).

6. The anti-feedback structure of the dynamic microphone according to claim 5, characterized in that, A stainless steel ring (240) is provided on the side of the connecting part (230) away from the receiving part (220), and a limiting rod (141) is provided on the inner wall of the first housing (130). The limiting rod (141) is inserted into the stainless steel ring (240) and the two are loosely fitted.

7. The anti-feedback structure of the dynamic microphone according to claim 4, characterized in that, The through hole (110) surrounds the connection portion (230).

8. The anti-feedback structure of the dynamic microphone according to claim 7, characterized in that, The diameter of the through hole (110) is 1 mm to 3.5 mm, and the total opening area of ​​the through hole (110) accounts for 5% to 10% of the side wall surface area of ​​the housing assembly (100).

9. The anti-feedback structure of the dynamic microphone according to claim 5, characterized in that, A control circuit board (132) is provided inside the first housing (130), and a battery (142) is provided inside the second housing (140). The battery (142) and the control circuit board (132) are electrically connected. The control circuit board (132) is electrically connected to the microphone unit (200) and the speaker unit (300) respectively.

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