Novel diaphragm assembly and vibration microphone

Abstract

The vibration microphone comprises a pickup device and a shell, the pickup device is arranged in the shell, the pickup device comprises a circuit board, a back polar plate seat, a back polar plate, an insulating spacer, a vibrating diaphragm assembly and a spacer which are sequentially arranged from top to bottom, insulating plastic rings are sleeved on the outer sides of the back polar plate seat and the back polar plate, the vibrating diaphragm assembly comprises a base ring and a vibrating diaphragm, and the base ring is sleeved on the back polar plate seat. A balancing weight is arranged in the center of the vibrating diaphragm, a vibrating diaphragm gap is arranged between the balancing weight and the base ring, the vibrating diaphragm vibrates to drive the balancing weight to vibrate, the balancing weight is a circular thin plate, a plurality of air holes are distributed in the balancing weight, and the air holes are communicated with vibrating spaces above and below the vibrating diaphragm. The vibration sensor has the advantages that vibration signals can be stably collected in the frequency band of 20-1.5 kHz, the collected sound signals are transmitted through the circuit board, more real and high-quality musical instrument sound can be restored through subsequent processing, and the high requirements of scenes such as professional playing and recording for sound quality are met.

Description

Technical Field

[0001] This utility model relates to the field of microphones, and in particular to a novel diaphragm assembly and a vibration microphone. Background Technology

[0002] Vibration microphones, also known as pickups, differ significantly from traditional pickups. They rely on picking up the vibrations of the instrument's soundbox and transmitting them to a built-in miniature condenser microphone to capture the instrument's sound. Their built-in condenser pickup head clearly reproduces the instrument's sound without coloration, resulting in a more delicate overall sound compared to ordinary instrument pickups, capturing more sonic details. Therefore, they can be conveniently used for picking up sound from common resonant acoustic instruments such as guitars, mandolins, violins, violas, cellos, and guzheng, as well as other stringed instruments, and have broad application prospects in the field of instrument sound acquisition.

[0003] However, existing vibration microphones still have certain technical limitations. Currently, common vibration microphones mainly consist of a shell, pads, backplate, backplate holder, and circuit board, with the bottom surface of the shell acting as the diaphragm assembly. In practical applications, especially in the commonly used 20-1.5kHz frequency range, existing technology reveals significant shortcomings. Within this frequency range, existing vibration microphones collect large vibration fluctuations, resulting in unstable vibration signals and directly leading to poor performance. Unstable vibration signals affect the quality of the acquired sound, making it impossible to accurately reproduce the true timbre of instruments. This makes it difficult to meet the needs of users in professional performances and recordings where high sound quality is required. Therefore, developing a vibration microphone capable of stably acquiring vibration signals and improving performance in this frequency range is of significant practical importance. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a novel diaphragm assembly and vibration microphone. The vibration microphone of this utility model can effectively improve the stability of the acquired vibration signal and improve the acquisition quality in the commonly used frequency range of 20-1.5kHz.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a vibration microphone, including a pickup device and a shell. The pickup device is disposed inside the shell and includes a circuit board, a back electrode plate base, a back electrode plate, an insulating pad, a diaphragm assembly, and a pad arranged from top to bottom. An insulating plastic ring is sleeved on the outer side of the back electrode plate base and the back electrode plate. A vent hole is provided on the bottom surface of the shell and a dustproof net is covered on the vent hole. The diaphragm assembly includes a base ring and a diaphragm. A counterweight is provided at the center of the diaphragm. A diaphragm gap is provided between the counterweight and the base ring. The vibration of the diaphragm drives the counterweight to vibrate, and the airflow generated by the vibration passes through the vent hole.

[0006] A further preferred embodiment of this utility model is: the counterweight is a circular thin metal plate, and multiple air holes are distributed on the counterweight, the air holes being connected to the vibration space above and below the diaphragm.

[0007] A further preferred embodiment of this invention is that the diaphragm covers the lower surface of the base ring, and the counterweight is disposed on the upper surface of the diaphragm.

[0008] A further preferred embodiment of this utility model is that the counterweight and the base ring have the same thickness.

[0009] A further preferred embodiment of this utility model is that the number of air vents is 3, 4, or 5.

[0010] A further preferred embodiment of this utility model is that the back electrode plate holder is H-shaped, and the sum of the heights of the back electrode plate holder and the back electrode plate is the same as the height of the insulating plastic ring.

[0011] A further preferred embodiment of this utility model is that both the back electrode plate and the circuit board are provided with ventilation holes.

[0012] A further preferred embodiment of this utility model is that the vent is located in the center of the bottom surface of the outer shell, and the vent is circular.

[0013] A further preferred embodiment of this utility model is that the outer shell, back electrode plate holder, back electrode plate, diaphragm assembly, and gasket are all made of metal materials.

[0014] Through the aforementioned structural design and the technical effects achieved by the claims, the vibration microphone of this invention effectively overcomes the shortcomings of the prior art. A counterweight is incorporated into the diaphragm assembly, and the diaphragm vibration drives the counterweight to vibrate. The counterweight increases the inertia of the vibration, making the diaphragm more stable during vibration and reducing vibration deviation. This allows for stable acquisition of vibration signals in the 20-1.5kHz frequency range. The acquired sound signal is transmitted through the circuit board and, after subsequent processing, can reproduce a more realistic and high-quality instrument sound, meeting the high sound quality requirements of professional performances and recordings. Ventilation holes are provided on the bottom of the outer shell and covered with a dustproof mesh. This ensures that the airflow generated by vibration can be smoothly discharged, preventing airflow accumulation from interfering with diaphragm vibration and ensuring the stability of vibration signal acquisition. Attached Figure Description

[0015] Figure 1 Stereo for vibration microphones Figure 1 ;

[0016] Figure 2 Stereo for vibration microphones Figure 2 ;

[0017] Figure 3 For the explosion of the vibration microphone Figure 1 ;

[0018] Figure 4 For the explosion of the vibration microphone Figure 2 ;

[0019] Figure 5 This is a cross-sectional view of a vibration microphone;

[0020] Figure 6 This is a 3D view of the diaphragm assembly;

[0021] Figure 7 The test polarity diagram is for existing designs and this utility model. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figures 1-7 As shown, a vibration microphone includes a pickup device and a housing 1. The pickup device is disposed inside the housing 1 and includes, from top to bottom, a circuit board 2, a back electrode holder 3, a back electrode 4, an insulating pad 5, a diaphragm assembly 6, and a pad 7. Insulating plastic rings 8 are fitted around the outer sides of the back electrode holder 3 and the back electrode 4. A vent 9 is provided on the bottom surface 22 of the housing 1, and a dustproof mesh 10 covers the vent 9. The diaphragm assembly 6 includes a base ring 11 and a diaphragm 12. A counterweight 13 is positioned at the center of the diaphragm 12. Vibration of the diaphragm 12 causes the counterweight 13 to vibrate, and the airflow generated by the vibration passes through the vent 9. The diaphragm gap 20 between the counterweight 13 and the base ring 11 provides ample space for diaphragm vibration, reducing vibration obstruction caused by space limitations, further enhancing the flexibility and stability of diaphragm vibration, and enabling the microphone to more sensitively capture subtle vibration changes. A vent 9 is provided on the bottom surface of the outer shell 1, and a dustproof mesh 10 is provided on the vent 9. This ensures that the airflow generated by vibration can be smoothly discharged, reducing the interference of airflow on vibration, and preventing dust and other impurities from entering the microphone and affecting its performance. A counterweight 13 is provided in the diaphragm assembly 6. The vibration of the diaphragm 12 drives the counterweight 13 to vibrate. The counterweight 13 increases the inertia of the vibration, making the vibration more stable and helping to stably collect vibration signals in the 20-1.5kHz frequency range. The insulating plastic ring 8 ensures the stability and insulation performance of the entire pickup structure. The stable structure helps to accurately capture vibration signals, while the good insulation performance avoids signal interference and leakage, improving the microphone's working efficiency and reliability.

[0024] like Figure 7As shown, a traditional vibration microphone and the vibration microphone of this invention were tested. Curve A represents the frequency response curve of the prior art, and curve B represents the frequency response curve of this invention. The smoother the frequency response curve, the better the sound pickup performance of the vibration microphone. Curve B is significantly smoother than curve A in the 20-1.5kHz frequency range, exhibiting better sound pickup performance.

[0025] The counterweight 13 is a circular thin metal plate. This shape and material provide suitable weight and inertia, ensuring increased vibration stability without excessively affecting the vibration sensitivity of the diaphragm 12, thus ensuring accurate capture of the instrument's vibration signals. Multiple vents 15 are distributed on the counterweight 13, connecting the vibration spaces above and below the diaphragm 12. These vents allow for smooth airflow above and below the diaphragm 12, further reducing airflow obstruction and improving the stability and accuracy of vibration signal acquisition. The diaphragm 12 covers the lower surface of the base ring 11, and the counterweight 13 is positioned on the upper surface of the diaphragm 12. This structural layout is reasonable, effectively transmitting vibrations and ensuring that the counterweight 13 and diaphragm 12 work together to enhance vibration stability. The counterweight 13 and the base ring 11 have the same thickness, which ensures the symmetry and balance of the entire diaphragm assembly 6 structure, helps to maintain stability during vibration, and reduces vibration deviation caused by structural imbalance.

[0026] There are 3, 4, or 5 vent holes 15. Experiments have verified that this number of vent holes 15 ensures smooth airflow while maintaining the structural strength of the counterweight 13, preventing performance issues caused by too many or too few vent holes 15. The back electrode plate base 3 is H-shaped, and the combined height of the back electrode plate base 3 and the back electrode plate 4 is the same as the height of the insulating plastic ring 8. This precise structural design ensures a tight fit between the components, guaranteeing both insulation performance and the stability of the entire pickup device structure. Vent holes 21 are provided on both the back electrode plate 4 and the circuit board 2. The presence of vent holes 21 on both the back electrode plate 4 and the circuit board 2 further optimizes the airflow path, allowing the airflow generated by vibration to be discharged more quickly, reducing the impact of airflow on vibration, and improving the quality of vibration signal acquisition. The vent hole 9 is located in the center of the bottom surface of the outer casing 1 and is circular. The vent 9 is located in the center of the bottom surface of the housing 1 and is circular. This position and shape design facilitates uniform airflow, reduces airflow turbulence, and improves the stability of vibration signal acquisition. The housing 1, back electrode holder 3, back electrode 4, diaphragm assembly 6, and gasket 7 are all made of metal. Metal has good conductivity and mechanical strength, which not only helps with signal transmission but also ensures the microphone structure's robustness and durability, extending its service life.

[0027] The present invention has provided a detailed description of a novel diaphragm assembly and vibration microphone. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of these embodiments are merely for the purpose of helping to understand the present invention and its core concepts. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A vibration microphone, comprising a pickup device and a housing, wherein the pickup device is disposed within the housing, and the pickup device includes, from top to bottom, a circuit board, a back electrode holder, a back electrode, an insulating pad, a diaphragm assembly, and a gasket, wherein an insulating plastic ring is fitted around the outer side of the back electrode holder and the back electrode, characterized in that... The diaphragm assembly comprises a base ring and a diaphragm, a balance weight is arranged at the center of the diaphragm, a diaphragm gap is arranged between the balance weight and the base ring, the diaphragm is vibrated to drive the balance weight to vibrate, the balance weight is a circular thin plate, and a plurality of air holes are distributed on the balance weight and communicate the vibration spaces above and below the diaphragm.

2. A vibration microphone according to claim 1, characterized in that The bottom surface of the shell is provided with a ventilation hole, the ventilation hole is covered with a dustproof net, and the airflow generated by vibration passes through the ventilation hole.

3. A vibration microphone according to claim 1, characterized in that The diaphragm covers the lower surface of the base ring, and the balance weight is arranged on the upper surface of the diaphragm.

4. A shock microphone according to claim 1, wherein The thickness of the balance weight and the base ring is the same.

5. A vibration microphone according to claim 2, characterized in that The air holes are 3 or 4 or 5.

6. A shock microphone according to claim 1, wherein The back plate seat is H-shaped, and the height of the back plate seat and the back plate is the same as the height of the insulating plastic ring.

7. A vibration microphone according to claim 1, characterized in that The back plate and the circuit board are both provided with air holes.

8. A vibration microphone according to claim 2, characterized in that The ventilation hole is arranged at the center of the bottom surface of the shell and is circular.

9. A novel diaphragm assembly comprising a base ring and a diaphragm, characterized in that The diaphragm assembly comprises a base ring and a diaphragm, a balance weight is arranged at the center of the diaphragm, a diaphragm gap is arranged between the balance weight and the base ring, the diaphragm is vibrated to drive the balance weight to vibrate, the balance weight is a circular thin plate, and a plurality of air holes are distributed on the balance weight and communicate the vibration spaces above and below the diaphragm.

10. A novel diaphragm assembly according to claim 9, characterized in that The diaphragm covers the lower surface of the base ring, and the balance weight is arranged on the upper surface of the diaphragm, the thickness of the balance weight and the base ring is the same.

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