Outdoor microphone structure

Abstract

The present invention discloses an outdoor microphone structure, comprising a windshield, a sound collection tube, a spring contact pin, an electrostatic excitation plate, a microphone, a preamplifier, a positioning sleeve, a mounting tube holder, a base bracket, a preamplifier cable, a circuit board, and an electrostatic excitation interface seat; the sound collection tube is electrically connected to the upper end of the positioning sleeve; the circuit board is electrically connected to the lower end of the positioning sleeve; the mounting tube holder is made of an insulating material and is covered outside the positioning sleeve; the microphone is disposed within the sound collection tube; the electrostatic excitation plate is insulated and connected to the microphone; the spring contact pin is electrically connected to the sound collection tube and is in conductive contact with the electrostatic excitation plate; and the electrostatic excitation interface seat is electrically connected to the circuit board. The present invention ensures the consistency of the sound collected radially by the microphone by designing an integrated electrostatic excitation current transmission circuit.

Description

Technical Field

[0001] The present invention relates to the technical field of microphones, and in particular to an outdoor microphone structure. Background Art

[0002] An outdoor microphone is an acoustic device commonly used for environmental noise monitoring. It typically consists of a standard working condenser microphone and a specially designed outdoor kit. Due to the complex and ever-changing outdoor environment and the fact that condenser microphones are precision instruments, when used for long-term, all-weather monitoring tasks, outdoor microphones must not only be waterproof, windproof, and dustproof, but also require daily inspection to detect sensitivity fluctuations due to factors such as long-term operation or environmental changes. This allows users to promptly adjust the correction factor and avoid deviations in noise monitoring results. Capacitive sensor calibration is generally divided into two methods: acoustic signal calibration and electrostatic excitation calibration.

[0003] Existing outdoor microphone products with electrostatic excitation calibration function have the following defects: the traditional structure of using wires to connect to the steel mesh outside the sound collection tube has the problem of sound signal reception distortion caused by structural asymmetry. Summary of the Invention

[0004] 1. Technical problem to be solved by the invention

[0005] The present invention aims to solve the technical problems existing in the prior art and to provide an outdoor microphone structure which ensures the consistency of the sound collected radially by the microphone by designing an integrated electrostatic excitation current transmission circuit.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the technical solution provided by the present invention is:

[0008] An outdoor microphone structure includes a windshield, a sound collection tube, a spring contact pin, an electrostatic excitation board, a microphone, a preamplifier, a positioning sleeve, a mounting tube socket, a base bracket, a preamplifier cable, a circuit board, and an electrostatic excitation interface socket; the sound collection tube is electrically connected to the upper end of the positioning sleeve; the circuit board is electrically connected to the lower end of the positioning sleeve; the mounting tube socket is made of insulating material and is covered outside the positioning sleeve; the microphone is arranged in the sound collection tube; the electrostatic excitation board is insulated and connected to the microphone; the spring contact pin is electrically connected to the sound collection tube and is in conductive contact with the electrostatic excitation board; and the electrostatic excitation interface socket is electrically connected to the circuit board.

[0009] Optionally, the windshield and the sound collection tube are both connected to the mounting tube seat, and the mounting tube seat is detachable relative to the positioning sleeve.

[0010] Optionally, the electrostatic excitation interface seat is electrically connected to the circuit board through an automatic circuit breaker mechanism; the automatic circuit breaker mechanism includes a magnetic block, which is provided on the side of the circuit board close to the mounting tube seat; a conductive needle, which is provided on the side of the circuit board away from the mounting tube seat; a connecting column, which is used to connect the magnetic block and the conductive needle; a spring, which is used to drive the conductive needle to move in a direction away from the circuit board; a magnetic ring is provided on the mounting tube seat to cooperate with the magnetic block, and the circuit board is electrically connected when it abuts against the conductive needle.

[0011] Optionally, the preamplifier is disposed in the positioning sleeve, the preamplifier and the preamplifier cable are connected by a quick-plug connector, and a pulling hole is provided through the side wall of the positioning sleeve.

[0012] Optionally, a microphone ferrule is provided between the microphone and the sound collecting tube, and the microphone ferrule includes a sleeve made of an insulating material; an inner O-ring provided on the inner circumference of the sleeve; and an outer O-ring provided on the outer circumference of the sleeve; the inner O-ring and the outer O-ring are axially staggered.

[0013] Optionally, a drainage hole is provided on the sound collection tube, and the drainage hole is located above the outer O-ring.

[0014] Optionally, a steel mesh is wrapped around the outside of the sound collecting tube and covers the drainage hole.

[0015] Optionally, the sound collection tube and the positioning sleeve are threadedly connected, and two limiting O-rings are spaced apart inside the positioning sleeve.

[0016] Optionally, a limiting ring is further provided in the positioning sleeve, the limiting ring is made of insulating material, and the inner diameter of the limiting ring is smaller than the inner diameter of the positioning sleeve.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0019] In order to ensure the consistency of the sound collected radially by the microphone, the structure of this outdoor microphone is designed with an integrated electrostatic excitation current transmission circuit, eliminating the traditional structure of using external wires passing through the steel mesh outside the sound collection tube, avoiding the problem of sound signal reception distortion caused by structural asymmetry. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic cross-sectional view of an outdoor microphone structure proposed in an embodiment of the present invention;

[0021] Figure 2A schematic structural diagram of a wind and rainproof protective cover in an outdoor microphone structure proposed in an embodiment of the present invention;

[0022] Figure 3 This is a schematic structural diagram of a positioning sleeve in an outdoor microphone structure proposed in an embodiment of the present invention;

[0023] Figure 4 A schematic structural diagram of an automatic disconnect mechanism in an outdoor microphone structure proposed in an embodiment of the present invention;

[0024] 1. Windshield; 2. Sound collection tube; 21. Drain hole; 3. Spring contact pin; 4. Electrostatic excitation board; 5. Microphone; 6. Preamplifier; 7. Positioning sleeve; 71. Pull-out hole; 72. Limit O-ring; 73. Limit ring; 8. Mounting tube socket; 81. Magnetic ring; 9. Base bracket; 10. Preamplifier cable; 11. Circuit board; 12. Electrostatic excitation interface socket; 13. Automatic circuit breaker; 131. Magnetic block; 132. Conductive pin; 133. Connecting column; 134. Spring; 14. Microphone ferrule; 141. Sleeve; 142. Inner O-ring; 143. Outer O-ring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0026] It should be noted that when an element is referred to as being "fixed on", "set on", "fixed on" or "installed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. Furthermore, when an element is considered to be "fixedly connected" to another element, the two may be fixed in a detachable manner or in a non-detachable manner, such as socketing, snap-fitting, integrally molded fixing, welding, etc., which can be achieved in the prior art and will not be described in detail here. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is vertical, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] The “first” and “second” involved in the present invention do not represent specific quantities and orders, but are only used to distinguish names.

[0029] Combined with attachment Figure 1-4 The outdoor microphone structure of this embodiment includes a windshield 1, a sound collection tube 2, a spring contact pin 3, an electrostatic excitation board 4, a microphone 5, a preamplifier 6, a positioning sleeve 7, a mounting tube seat 8, a base bracket 9, a preamplifier cable 10, a circuit board 11, and an electrostatic excitation interface seat 12; the windshield 1 is located on the top of the microphone, the positioning sleeve 7 is made of a metal conductive material and is in the shape of a long cylinder, the sound collection tube 2 is electrically connected to the upper end of the positioning sleeve 7, and the upper part of the sound collection tube 2 is surrounded by evenly distributed rectangular openings. The sound collection tube 2 is made of metal. Conductive material, the spring contact pin 3 is a metal conductive material, which can be compressed and is used to conductively connect the sound collection tube 2 and the electrostatic excitation board 4. The spring contact pin 3 is fixed to the top of the sound collection tube 2, and its elastic contact is located inside the sound collection tube 2. After the overall assembly is completed, it is conductively abutted with the electrostatic excitation board 4. The microphone 5 is arranged in the sound collection tube 2, and the electrostatic excitation board 4 is insulated and connected to the top of the microphone 5. The circuit board 11 is electrically connected to the lower end of the positioning sleeve 7. The mounting tube seat 8 is made of insulating material and is covered outside the positioning sleeve 7. The electrostatic excitation interface seat 12 is electrically connected to the circuit board 11.

[0030] In order to ensure the consistency of the sound collected radially by the microphone, the structure of this outdoor microphone is designed with an integrated electrostatic excitation current transmission circuit, eliminating the traditional structure of using external wires passing through the steel mesh outside the sound collection tube, avoiding the problem of sound signal reception distortion caused by structural asymmetry.

[0031] As a preferred embodiment of the present invention, a sound-absorbing gasket is installed on the inner top of the sound collecting tube 2 .

[0032] As a preferred embodiment of the present invention, the windshield 1 and the sound collection tube 2 are both connected to the top of the mounting tube seat 8. The mounting tube seat 8 is made of plastic material and has an internal thread on the upper part. After the sound collection tube 2 is installed from its lower part, it is connected and fixed to the mounting tube seat 8 through an external thread. The mounting tube seat 8 is detachable relative to the positioning sleeve 7. The windshield 1, the sound collection tube 2, the spring contact pin 3 and the mounting tube seat 8 constitute a windproof and rainproof protective cover that can be detached by the user when in use, which is convenient for the sound calibrator and the microphone 5 to perform sound calibration.

[0033] As a preferred embodiment of the present invention, the electrostatic excitation interface seat 12 is electrically connected to the circuit board 11 through the automatic circuit breaker mechanism 13, the lower thread of the positioning sleeve 7 passes through the center hole of the circuit board 11 and is fixed to the base bracket 9, and after tightening, the positioning sleeve 7 is electrically connected to the circuit board 11, the preamplifier cable 10 and the electrostatic excitation interface seat 12 are fixed on the base bracket 9, and the electrostatic excitation interface seat 12 is electrically connected to the automatic circuit breaker mechanism 13; the automatic circuit breaker mechanism 13 includes a magnetic block 131, which is provided on the side of the circuit board 11 close to the mounting tube seat 8; a conductive needle 132, which is provided on the side of the circuit board 11 away from the mounting tube seat 8; a connecting column 133, which is used to connect the magnetic block 131 and the conductive needle 132; and a spring 134, which is used to drive the conductive needle 132 to move back and forth. The spring 134 is pressed against the end face of the conductive needle 132 facing away from the connecting post 133, and the other end is pressed against the base bracket 9. The base bracket 9 is made of plastic, and the spring 134 is electrically insulated from the circuit board 11. The space for the magnetic block 131 to move is reserved on the base bracket 9.

[0034] When the wind and rain shield is not installed, there is no magnetic force pulling the magnet block 131. The conductive pin 132 is then pushed open by the spring 134, and there is no electrical connection between the conductive pin 132 and the conductive disk of the circuit board. When the wind and rain shield is installed, the magnetic force of the magnetic ring 81 pulls the magnet block 131, causing the conductive pin 132 to contact the conductive disk of the circuit board 11, establishing an electrical connection. Therefore, when the wind and rain shield is installed, the high-voltage electrostatic excitation signal input by the electrostatic excitation interface 12 can be directly transmitted to the electrostatic excitation board 4, achieving electrostatic excitation calibration. When the wind and rain shield is removed, electric shock from the metal positioning sleeve 7 can be avoided.

[0035] In the present invention, since the positioning sleeve 7 is made of a conductive material and the preamplifier 6 housing is also made of a metal material, if the wind and rainproof protective cover is removed and the electrostatic excitation current is still operating, there is a risk of electric shock if a person touches the positioning sleeve 7 and preamplifier 6. To solve this problem, an automatic disconnect mechanism 13 is designed to automatically disconnect the electrostatic excitation current when the wind and rainproof protective cover is removed and automatically reconnect the electrostatic excitation current when the wind and rainproof protective cover is reinstalled, providing convenience and safety.

[0036] As a preferred embodiment of the present invention, the preamplifier 6 is disposed within the positioning sleeve 7. The preamplifier 6 and the preamplifier cable 10 are connected by a quick-plug connector. The preamplifier 6 is provided with multiple annular grooves to increase frictional resistance. The side wall of the positioning sleeve 7 is provided with a strip-shaped pull-out hole 71. The pull-out hole 71 is symmetrically arranged on both sides of the positioning sleeve 7 and extends along the length of the positioning sleeve 7. This design facilitates the removal of the preamplifier 6, unlike previous products that were fixed and non-removable. This also facilitates the inspection and calibration of the preamplifier, microphone, and noise monitoring system acquisition module.

[0037] As a preferred embodiment of the present invention, a microphone ferrule 14 is positioned between the microphone 5 and the sound collection tube 2. This ferrule 14 comprises a sleeve 141 made of an insulating material; an inner O-ring 142 positioned on the inner circumference of sleeve 141; and an outer O-ring 143 positioned on the outer circumference of sleeve 141. The inner O-ring 142 and outer O-ring 143 are axially offset. The upper inner surface of sleeve 141 has a groove for receiving the inner O-ring 142, while the lower outer surface has a groove for receiving the outer O-ring 143. This design reduces the thickness of the annular sleeve 701, preventing the inner diameter of the mating sound collection tube 4 from being excessively large, thereby affecting the collected acoustic signal. Furthermore, the inner O-ring 142 maintains a sealed contact with the microphone housing, while the outer O-ring 143 maintains a sealed contact with the inner wall of the collection tube 4, effectively preventing rainwater from intruding into the microphone 5 and key components such as the preamplifier 6. Because the sound collecting tube 2 is provided with a drainage hole 21, and the drainage hole 21 is located slightly above the outer O-ring 143, it can prevent accumulated water from flooding the upper part of the microphone and causing damage.

[0038] As a preferred embodiment of the present invention, the outside of the sound collection tube 2 is wrapped with a steel mesh and covers the drainage hole 21. The opening of the sound collection tube 2 is surrounded by a circle of steel mesh to prevent rainwater from intruding. The steel mesh covers the drainage hole 21, which can prevent rainwater from entering but allow the accumulated water inside to be discharged smoothly.

[0039] As a preferred embodiment of the present invention, the sound collection tube 2 and positioning sleeve 7 are threadedly connected. Two spaced-apart O-rings 72 are positioned within the positioning sleeve 7. These O-rings 72 are compressed by the preamplifier 6 housing and the inner wall of the positioning sleeve 7. Their elastic restoring force ensures concentricity between the preamplifier 6 and the positioning sleeve 7. In this embodiment, the position of the preamplifier 6 within the sleeve is defined by the O-rings 72, ensuring concentricity after long-distance guidance through the positioning sleeve 7. Furthermore, the positioning sleeve 7 is threadedly connected to the sound collection tube 2, effectively ensuring the spatial positioning of the microphone within the sound collection tube 2. This ensures consistent acoustic signal acquisition during mass production of outdoor microphones.

[0040] As a preferred embodiment of the present invention, a limiting ring 73 is further provided in the positioning sleeve 7. The limiting ring 73 is an open ring structure and is made of a plastic material with good insulation properties. The opening is for the convenience of installing it into the corresponding groove of the positioning sleeve 7. After installation, the inner diameter of the limiting ring 73 is automatically only slightly larger than the outer diameter of the preamplifier 6. The inner diameter of the limiting ring 73 is smaller than the inner diameter of the positioning sleeve 7. The limiting ring 73 is used to isolate the preamplifier 6 and the positioning sleeve 7 to prevent accidental conduction from causing failure of the electrostatic excitation function.

[0041] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs a structure and embodiment similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. An outdoor microphone structure, characterized in that: It includes a windshield, a sound collection tube, a spring stylus, an electrostatic excitation board, a microphone, a preamplifier, a positioning sleeve, a mounting tube seat, a base bracket, a preamplifier cable, a circuit board, and an electrostatic excitation interface seat. The positioning sleeve and the sound collection tube are both made of conductive metal. The sound collection tube is electrically connected to the upper end of the positioning sleeve; The circuit board is electrically connected to the lower end of the positioning sleeve; The mounting pipe seat is made of insulating material and is covered outside the positioning sleeve; The microphone is arranged in the sound collecting tube; The electrostatic excitation plate is insulated and connected to the microphone; The spring contact pin is electrically connected to the sound collecting tube and is in conductive contact with the electrostatic excitation plate; The electrostatic excitation interface seat is electrically connected to the circuit board; The windshield and the sound collection tube are both connected to the mounting tube base, and the mounting tube base is detachable relative to the positioning sleeve; the electrostatic excitation interface base is electrically connected to the circuit board through an automatic circuit breaker mechanism; The automatic circuit breaker mechanism includes A magnetic attraction block is provided on a side of the circuit board close to the mounting socket; A conductive pin is provided on a side of the circuit board away from the mounting socket; A connecting post, used to connect the magnetic attraction block and the conductive needle; a spring, used for driving the conductive needle to move in a direction away from the circuit board; The mounting tube seat is provided with a magnetic ring matched with the magnetic attraction block, and the circuit board is electrically connected to the conductive needle when it abuts against the conductive needle.

2. The outdoor microphone structure according to claim 1, characterized in that: The preamplifier is arranged in the positioning sleeve, the preamplifier and the preamplifier cable are connected by plugging and unplugging through a quick-plug connector, and a pulling hole is penetrated on the side wall of the positioning sleeve.

3. An outdoor microphone structure according to any one of claims 1 or 2, characterized in that: A microphone ferrule is provided between the microphone and the sound collecting tube, and the microphone ferrule includes a casing, made of an insulating material; An inner O-ring, provided on the inner circumference of the sleeve; an outer O-ring, disposed on the outer circumference of the sleeve; The inner O-ring and the outer O-ring are axially staggered.

4. The outdoor microphone structure according to claim 3, characterized in that: The sound collecting tube is provided with a drainage hole, and the drainage hole is arranged above the outer O-ring.

5. The outdoor microphone structure according to claim 4, characterized in that: The outside of the sound collecting tube is wrapped with a steel mesh and covers the drainage hole.

6. The outdoor microphone structure according to claim 3, characterized in that: The sound collecting tube is threadedly connected to the positioning sleeve, and two limiting O-rings are spaced apart in the positioning sleeve.

7. The outdoor microphone structure according to claim 6, characterized in that: A limiting ring is further provided in the positioning sleeve. The limiting ring is made of insulating material, and the inner diameter of the limiting ring is smaller than the inner diameter of the positioning sleeve.

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