Electret microphone

Abstract

The utility model discloses an electret microphone, which relates to the field of microphones and comprises a shell, a supporting block fixedly connected to the left side of the shell, a rotating rod movably connected to the inside of the supporting block, a baffle fixedly connected to one side of the rotating rod, a clamping hole formed in the baffle, a connecting block fixedly connected to the position, close to the supporting block, of the left side of the shell. An adjusting groove is formed in the connecting block, and a telescopic rod is arranged in the adjusting groove; compared with the prior art, the microphone has the advantages that the connecting port can be protected through the connecting block, the telescopic rod, the spring, the clamping rod, the baffle and other assemblies, dust and other impurities are effectively prevented from entering the microphone, normal use of the microphone is ensured, and meanwhile the service life of the microphone can be prolonged; the circuit board can be quickly assembled and disassembled through assemblies such as a clamping ring, a clamping ring, a threaded sleeve and a threaded column, so that the circuit board can be overhauled after being used for a long time, and meanwhile, the overhauling difficulty can also be reduced.

Description

Technical Field

[0001] This utility model relates to the field of microphones, and in particular to an electret microphone. Background Technology

[0002] Electret microphones are a new type of capacitor microphone made using electret materials. Their internal diaphragm or back electrode uses electret materials that can store charge, eliminating the need for an external polarization power supply. Electret microphones have advantages such as simple structure, good electroacoustic performance, small size, and low price. They are widely used in electronic products such as mobile phones, telephones, MP3 players, MP4 players, digital cameras, and voice recognition systems. In addition, they also have the characteristics of low vibration and high output sensitivity. They are gradually replacing microphones with external polarization voltage in fields such as recording, sound reinforcement, and outdoor noise measurement.

[0003] A search revealed that patent CN221429105U discloses "an electret microphone." Although it features a vent on the upper housing, a breathable membrane to block airflow, and a filling layer, and improves sound acquisition quality and installation convenience through reasonable design of the microphone's shape and structure and the design of the motherboard's mounting cavity, the microphone's connection port lacks an effective protective structure. This makes it susceptible to intrusion of dust and other impurities during long-term storage. These impurities not only affect the microphone's normal function but may also damage its internal structure, thereby shortening the overall lifespan of the microphone. Utility Model Content

[0004] The purpose of this invention is to provide an electret microphone to solve the problem mentioned in the background art that the microphone connection port lacks an effective protective structure, which makes it easy for dust and other impurities to enter during long-term storage. These impurities not only affect the normal function of the microphone, but may also damage its internal structure, thereby shortening the service life of the entire microphone.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an electret microphone, comprising a housing, a support block fixedly connected to the left side of the housing, a rotating rod movably connected inside the support block, a baffle fixedly connected to one side of the rotating rod, a locking hole provided inside the baffle, a connecting block fixedly connected to the left side of the housing near the support block, an adjusting groove provided inside the connecting block, a telescopic rod provided inside the adjusting groove, a spring sleeved on the outside of the telescopic rod, a push block fixedly connected to the rear side of the telescopic rod, and a locking rod fixedly connected to the rear side of the push block.

[0006] Preferably, a circuit board is provided inside the housing, an electret assembly is provided at the upper end of the circuit board, a connection port is provided at the upper edge of the circuit board, a vent is provided on the inner wall of the housing, and a windproof cover is provided inside the vent.

[0007] Preferably, a threaded post is fixedly connected to the lower end of the circuit board, a base is provided at the lower end of the housing, a retaining ring is fixedly connected to the upper edge of the base, a retaining ring is movably connected inside the retaining ring, a short rod is fixedly connected to the upper end of the retaining ring, and a threaded sleeve is fixedly connected to the upper end of the short rod.

[0008] Preferably, the pusher block slides inside the adjusting groove via a telescopic rod and a spring.

[0009] Preferably, the number of the threaded posts is multiple sets, and they are symmetrically arranged about the center line of the circuit board.

[0010] Preferably, the internal thread of the threaded sleeve is adapted to the external thread of the threaded post.

[0011] Using the above technical solution, by pushing the push block, the push block compresses the spring of the telescopic rod, and the locking rod slides out from the inside of the locking hole and releases the restriction on the baffle. The baffle is rotated to one side, and the connection port is exposed, allowing the operator to insert the external connector. Similarly, after use, the baffle is rotated in the opposite direction. When the baffle reaches the position of the locking rod, the spring rebounds, causing the telescopic rod to push the locking rod into the locking hole, thus fixing the baffle. At this time, the baffle covers one side of the connection port. Through the components such as the connecting block, telescopic rod, spring, locking rod, and baffle, the connection port can be protected, effectively preventing dust and other impurities from entering, ensuring the normal use of the microphone, and also improving its service life.

[0012] By adopting the above technical solution, the circuit board moves upward under the action of the external thread of the threaded post by rotating the threaded sleeve, thus separating it from the base. The staff can then inspect the electret components and connectors on the circuit board. Similarly, during installation, the threaded sleeve is fitted onto the outside of the threaded post and rotated in the opposite direction, so that the threaded post enters the inside of the threaded sleeve, completing the installation and fixation of the circuit board. The circuit board can be quickly installed and removed by components such as retaining rings, retaining rings, threaded sleeves, and threaded posts, which enables maintenance during long-term use and also reduces the difficulty of maintenance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an electret microphone according to the present invention.

[0014] Figure 2 This is a schematic diagram of the internal structure of the shell in an embodiment of this utility model.

[0015] Figure 3 This is a schematic diagram of the baffle structure in an embodiment of the present invention.

[0016] Figure 4 This is a schematic diagram of the internal structure of the connecting block in an embodiment of this utility model.

[0017] Figure 5 This is a schematic diagram of the circuit board structure in an embodiment of this utility model.

[0018] Figure 6 This is a schematic diagram of the base structure in an embodiment of this utility model.

[0019] In the diagram: 1. Housing; 2. Support block; 3. Rotating rod; 4. Baffle; 5. Locking hole; 6. Connecting block; 7. Adjustment groove; 8. Telescopic rod; 9. Spring; 10. Push block; 11. Locking rod; 12. Vent hole; 13. Windproof cover; 14. Circuit board; 15. Electret assembly; 16. Connection port; 17. Threaded post; 18. Base; 19. Snap ring; 20. Snap ring; 21. Short rod; 22. Threaded sleeve. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other. Example 1

[0021] Please see Figures 1-6 An electret microphone includes a housing 1. A support block 2 is fixedly connected to the left side of the housing 1. A rotating rod 3 is movably connected inside the support block 2. A baffle 4 is fixedly connected to one side of the rotating rod 3. A locking hole 5 is opened inside the baffle 4. A connecting block 6 is fixedly connected to the left side of the housing 1 near the support block 2. An adjustment groove 7 is opened inside the connecting block 6. A telescopic rod 8 is provided inside the adjustment groove 7. A spring 9 is sleeved on the outside of the telescopic rod 8. A push block 10 is fixedly connected to the rear side of the telescopic rod 8. A locking rod 11 is fixedly connected to the rear side of the push block 10. The push block 10 slides inside the adjustment groove 7 through the telescopic rod 8 and the spring 9.

[0022] Specifically, pushing the push block 10 causes the telescopic rod 8 to compress the spring 9, while the locking rod 11 slides out from inside the locking hole 5 and releases the restriction on the baffle 4. Rotating the baffle 4 to one side exposes the connection port 16, allowing the operator to insert the external connector. Similarly, after use, rotating the baffle 4 in the opposite direction causes the spring 9 to rebound, pushing the telescopic rod 8 into the locking hole 5 to fix the baffle 4. At this time, the baffle 4 covers one side of the connection port 16. Through the components such as the connecting block 6, telescopic rod 8, spring 9, locking rod 11, and baffle 4, the connection port 16 is protected, effectively preventing dust and other impurities from entering, ensuring the normal use of the microphone, and also extending its service life. Example 2

[0023] Please see Figures 1-6 An electret microphone is provided, wherein a circuit board 14 is provided inside the housing 1, an electret assembly 15 is provided at the upper end of the circuit board 14, a connection port 16 is provided at the upper edge of the circuit board 14, a vent hole 12 is provided on the inner wall of the housing 1, a windproof cover 13 is provided inside the vent hole 12, a threaded post 17 is fixedly connected to the lower end of the circuit board 14, a base 18 is provided at the lower end of the housing 1, a retaining ring 19 is fixedly connected at the upper edge of the base 18, a retaining ring 20 is movably connected inside the retaining ring 19, a short rod 21 is fixedly connected to the upper end of the retaining ring 20, a threaded sleeve 22 is fixedly connected to the upper end of the short rod 21, and multiple sets of threaded posts 17 are symmetrically arranged about the center line of the circuit board 14, and the internal thread of the threaded sleeve 22 is adapted to the external thread of the threaded post 17.

[0024] Specifically, by rotating the threaded sleeve 22, the circuit board 14 moves upward under the action of the external thread of the threaded post 17, thus separating it from the base 18. The operator can then inspect the electret assembly 15 and the connection port 16 on the circuit board 14. Similarly, during installation, the threaded sleeve 22 is fitted onto the outside of the threaded post 17 and rotated in the opposite direction, so that the threaded post 17 enters the interior of the threaded sleeve 22, completing the installation and fixation of the circuit board 14. The circuit board 14 can be quickly installed and removed through components such as the retaining ring 19, retaining ring 20, threaded sleeve 22, and threaded post 17, which enables maintenance during long-term use and reduces the difficulty of maintenance.

[0025] Working Principle: When using this electret microphone, first ensure that the connection port 16 is exposed so that external connectors can be connected to the microphone through the connection port 16. Specifically, push the push block 10, which compresses the spring 9 onto the telescopic rod 8. The locking rod 11 then slides out from the locking hole 5 and releases the restriction on the baffle 4. Rotate the baffle 4 to one side, exposing the connection port 16, allowing the operator to insert the external connector. Similarly, after use, rotate the baffle 4 in the opposite direction. When the baffle 4 reaches the position of the locking rod 11, the spring 9 rebounds, causing the telescopic rod 8 to push the locking rod 11 into the locking hole 5, thus fixing the baffle 4. At this time, the baffle 4 covers one side of the connection port 16. The components, including the connection block 6, telescopic rod 8, spring 9, locking rod 11, and baffle 4, protect the connection port 16, effectively preventing dust and other impurities from entering and ensuring the normal operation of the microphone. To extend the service life, the windproof cover 13 effectively reduces wind noise and improves the volume acquisition effect during microphone use. If the motherboard and electret component 15 need to be inspected, the base 18 can be removed from the housing 1 by screws. Then, by rotating the threaded sleeve 22, the circuit board 14 moves upward under the action of the external thread of the threaded post 17, thus separating it from the base 18. The operator can then inspect the electret component 15 and the connection port 16 on the circuit board 14. Similarly, during installation, the threaded sleeve 22 is fitted onto the outside of the threaded post 17 and rotated in the opposite direction. The threaded post 17 enters the inside of the threaded sleeve 22, completing the installation and fixation of the circuit board 14. The circuit board 14 can be quickly installed and removed by components such as the retaining ring 19, retaining ring 20, threaded sleeve 22, and threaded post 17, thus enabling maintenance during long-term use and reducing the difficulty of maintenance.

[0026] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. An electret microphone comprising a housing (1), characterized in that: The left side of the casing (1) is fixedly connected with a support block (2), the inside of the support block (2) is movably connected with a rotating rod (3), one side of the rotating rod (3) is fixedly connected with a baffle (4), the inside of the baffle (4) is provided with a clamping hole (5), the left side of the casing (1) is fixedly connected with a connecting block (6) near the support block (2), the inside of the connecting block (6) is provided with an adjusting groove (7), the inside of the adjusting groove (7) is provided with a telescopic rod (8), the outside of the telescopic rod (8) is sleeved with a spring (9), the rear side of the telescopic rod (8) is fixedly connected with a push block (10), the rear side of the push block (10) is fixedly connected with a clamping rod (11).

2. An electret microphone according to claim 1, characterized in that: The inside of the casing (1) is provided with a circuit board (14), the upper end of the circuit board (14) is provided with an electret component (15), the upper end edge position of the circuit board (14) is provided with a connecting port (16), the inner wall of the casing (1) is provided with a ventilation hole (12), the inside of the ventilation hole (12) is provided with a wind shield (13).

3. An electret microphone according to claim 2, characterized in that: The lower end of the circuit board (14) is fixedly connected with a threaded column (17), the lower end of the casing (1) is provided with a base (18), the upper end edge position of the base (18) is fixedly connected with a clamping ring (19), the inside of the clamping ring (19) is movably connected with a clamping ring (20), the upper end of the clamping ring (20) is fixedly connected with a short rod (21), the upper end of the short rod (21) is fixedly connected with a threaded sleeve (22).

4. An electret microphone according to claim 1, characterized in that: The push block (10) slides in the adjusting groove (7) through the telescopic rod (8) cooperating with the spring (9).

5. An electret microphone according to claim 3, characterized in that: The number of the threaded column (17) is multiple groups, and it is symmetrically arranged about the midline of the circuit board (14).

6. An electret microphone according to claim 3, characterized in that: The internal thread of the threaded sleeve (22) is matched with the external thread of the threaded column (17).

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