CN211959478U

CN211959478U - Multifunctional noise-reduction microphone

Info

Publication number: CN211959478U
Application number: CN202021079684.6U
Authority: CN
Inventors: 范乔华
Original assignee: Shenzhen Lianfeng Technology Co ltd
Current assignee: Shenzhen Lianfeng Technology Co ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2020-11-17
Anticipated expiration: 2030-06-11

Abstract

The utility model discloses a multi-functional microphone of making an uproar that falls, include: the pickup shell is of a cylindrical columnar structure with a cavity inside, and a noise reduction control circuit board is fixed inside the pickup shell; the microphone is connected to one end of the sound pick-up shell and is electrically connected with the noise reduction control circuit board; the interference tube is axially sleeved at one end of the sound pick-up shell, which is provided with the microphone, in a sliding manner along the length direction of the sound pick-up shell; the interference pipe has the first pickup position that realizes closely picking up and the second pickup position that realizes remote pickup along the gliding in-process of length direction of adapter housing. So design, through the length that control circuit board's that falls predetermineeing and interfere the pipe of making an uproar in the adjustment make the microphone can carry out the fast switch over in close range full frequency pickup application scene and remote voice pickup application scene, satisfy the pickup demand in the multiple different application scenes.

Description

Multifunctional noise-reduction microphone

Technical Field

The utility model relates to a microphone technical field, concretely relates to multi-functional microphone of making an uproar that falls.

Background

The microphone is a device for collecting the sound of the field environment and then transmitting the sound to the back-end equipment, and consists of a microphone and an audio amplification circuit. In practice, the use of microphones is very purposeful, in other words, whether the technical specifications or characteristics of the microphone are ideal depends on the purpose for which it is used in a certain environment. Nevertheless, each microphone has basic design characteristics and specifications, and commonly used specifications include: sensitivity, frequency response, equivalent sound pressure level, directivity, dynamic range, maximum sound pressure level, output impedance, etc. The directivity of a microphone is also called as the directivity of the microphone, and refers to the correspondence of the microphone to sound pressures of different incident angles, specifically, when sound waves are incident on a diaphragm of the microphone at different angles, the diaphragm is subjected to different acting forces, so that the corresponding outputs are also different; such a characteristic that the sensitivity of the microphone changes depending on the angle of the incident sound wave is called the directivity of the microphone.

Since different types of microphones can only be used in specific environments, although some microphones change the directional characteristic through the adjusting circuit, no matter how the sound passes through the long interference tube, the sound can reach the microphone, the distortion is not reversible, and finally, the microphone can only be used as a microphone for picking up the human voice in a single application scene, and the single microphone cannot meet the sound pickup requirements of short-distance sound pickup (such as karaoke) or long-distance sound pickup (such as news interview), so that improvement is needed.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a multifunctional noise reduction microphone to solve the technical problem that the microphone can only be used in a single application scenario in the prior art.

In order to solve the technical problem, the technical scheme of the utility model as follows:

a multi-functional noise-reducing microphone, comprising:

the pickup shell is of a cylindrical columnar structure with a cavity inside, and a noise reduction control circuit board is fixed inside the pickup shell;

the microphone is connected to one end of the sound pick-up shell and is electrically connected with the noise reduction control circuit board;

the interference tube is axially sleeved at one end of the sound pick-up shell, which is provided with the microphone, in a sliding manner along the length direction of the sound pick-up shell; the interference pipe has the first pickup position that realizes closely picking up and the second pickup position that realizes remote pickup along the gliding in-process of length direction of adapter housing.

Further, be equipped with on the pipe wall of adapter housing and follow the spout that adapter housing length direction set up, the inner wall of interfering the pipe be equipped with spout sliding fit's slider structure.

Furthermore, a moving contact which keeps synchronous motion with the interference tube is arranged on the inner tube wall of the interference tube, two static contacts which are respectively arranged corresponding to the two opposite ends of the chute and can be electrically contacted with the moving contact are arranged in the cavity of the sound pickup shell, and the two static contacts are electrically connected to the noise reduction control circuit board; the moving contact is connected with different fixed contacts to switch the pickup mode of the pickup.

Furthermore, the end part of the sliding groove is provided with a buckle structure, and the sliding block structure is provided with a buckle head which can be buckled with the buckle structure.

Furthermore, a plurality of interference holes symmetrically arranged along the axial direction of the interference tube are formed in the tube wall of the interference tube.

Further, the centers of a plurality of the interference holes located on the same side are on a straight line.

Furthermore, the interference hole is a semicircular arc hole formed in the peripheral wall of the interference tube.

Furthermore, the interference pipe is covered with a metal mesh cover at the top part corresponding to one end of the sound pick-up shell.

Furthermore, a groove is formed in the outer peripheral wall of one end, back to the interference tube, of the sound pick-up shell, and the collet can be clamped on the groove of the sound pick-up shell.

Furthermore, the top of the end of the sound pickup shell connected with the interference tube is provided with a conical part with the caliber gradually reduced towards the direction of the interference tube.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a multi-functional noise reduction microphone, the pipe wall that is equipped with the one end of miaow head on the adapter casing is the axial slip and has cup jointed the interference pipe, the interference pipe is adjustable for adapter casing extension length, when the interference pipe is in the first pickup position that is the shortest for the extension length of adapter casing, promptly the interference pipe is in the contraction state, the scope angle of collection of miaow head to the sound source is great this moment, the microphone can be regarded as nearly microphone and use, and pickup frequency range is wide, the pickup quality is high, also portable; when interfering the pipe and being in the second pickup position that stretches out length longest for the adapter casing, interfere the pipe and outwards stretch out completely for the adapter casing, can regard as strong directive property microphone to use, the pickup distance is far away, and the anti-noise disturbs to the microphone can switch at close range full frequency pickup and remote vocal pickup according to the pickup demand, can satisfy the pickup demand of different scenes.

2. The utility model provides a multi-functional microphone of making an uproar that falls, interference pipe and adapter casing pass through slider structure and spout and realize the mode of both relative endwise slip, simple structure easily realizes.

3. The utility model provides a multi-functional microphone of making an uproar that falls sets up the moving contact along with interfering the pipe motion on interfering the pipe, inside two static contacts of being connected with the control circuit board electricity of making an uproar that fall of setting up of adapter casing, and different static contacts are connected with different signal conversion and processing circuit respectively, when the moving contact contacts with different static contacts, can carry out signal conversion to the audio signal that the miaow head was gathered through different circuits and handle to improve the pickup effect of microphone under two kinds of different modes respectively.

4. The utility model provides a multi-functional microphone of making an uproar that falls, the spout on slider structure on the interference pipe and the adapter casing passes through buckle structure and realizes both fixed connection's mode, can improve the stability of interference pipe and adapter casing connection structure, and then improves the audio acquisition quality of microphone.

5. The utility model provides a multi-functional microphone of making an uproar that falls, external sound source can get into through interfering the hole and interfere intraductally, the interference pore pair sound that the symmetry set up plays interference effect, come from when aligning interference pipe direction (0 degree) when the sound wave, all sound signal that get into interference pipe from each interference hole will arrive the vibrating diaphragm of miaow head simultaneously, therefore there is not phase interference, interference pipe obtains the maximum output, when the sound wave comes from side direction (theta angle), then the path length that sound wave reachd miaow head vibrating diaphragm process is different, the sound signal that each interference hole got into has the phase difference, locate to form phase interference at the vibrating diaphragm, lead to vibrating diaphragm department acoustic pressure to obtain the decay, thereby obtain strong directive property.

6. The utility model provides a multi-functional microphone of making an uproar that falls, with the center in a plurality of interference holes of one side on a straight line to and will interfere the hole and set up to half-circular arc, the acoustic pressure decay when the sound signal that each interference hole got into reachs the vibrating diaphragm department of miaow head is bigger, is favorable to obtaining stronger directive property.

7. The utility model provides a multi-functional microphone of making an uproar that falls, the setting of interfering the pipe top metal mesh enclosure can play the protection and reduce the effect that outside sound signal disturbed.

8. The utility model provides a multi-functional microphone of making an uproar that falls designs the conical head with the one end of adapter casing, makes the curve of microphone inside wall more level and smooth, forms a baffle, is favorable to the sound wave to form the phase place at miaow head vibrating diaphragm department and interferes.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of an overall structure of a multifunctional noise reduction microphone provided in an embodiment of the present invention in a contracted state;

fig. 2 is a schematic view of an overall structure of the multifunctional noise reduction microphone provided in the embodiment of the present invention in an extended state;

fig. 3 is an explosion diagram of the multifunctional noise reduction microphone according to the embodiment of the present invention.

Description of reference numerals: 1. a sound pickup housing; 2. an interference tube; 3. a chute; 4. a buckle structure; 5. an interference hole; 6. a metal mesh enclosure.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

A multifunctional noise-reducing microphone as shown in fig. 1-3 comprises a sound pick-up housing 1, a microphone head (not shown), a noise-reducing control circuit board and an interference tube 2. Wherein, adapter housing 1 and interference pipe 2 are the inside cylindric column structure that has the cavity, and adapter housing 1's pot head is established in the periphery of interfering pipe 2, and adapter housing 1's external diameter and interference pipe 2's internal diameter phase-match. The noise reduction control circuit board is installed in the internal cavity of the sound pick-up housing 1, the circuits on the noise reduction control circuit board are the signal conversion circuit, the amplification circuit and the filter circuit in the existing microphone, and the specific circuit design on the noise reduction control circuit board refers to the prior art. The microphone is connected to one end of the sound pick-up shell 1 close to the interference tube 2 and is electrically connected with the noise reduction control circuit board, and the microphone is used for converting the picked sound signals into voltage signals. The interference tube 2 is axially adjustably connected to the end of the microphone housing 1, at which the microphone is located, along the length of the microphone housing 1. The specific structure of the microphone and the mounting structure of the microphone on the sound pick-up housing 1 refer to the prior art, which is not described herein; the microphone can be a full-directional microphone, a heart microphone, a strong-directional microphone and the like according to needs.

The multifunctional noise-reducing microphone is characterized in that an interference tube 2 is axially sleeved on a tube wall of one end, provided with a microphone, of a sound pick-up shell 1 in a sliding mode, the extension length of the interference tube 2 relative to the sound pick-up shell 1 is adjustable, when the interference tube 2 is located at a first sound pick-up position with the shortest extension length relative to the sound pick-up shell 1, the interference tube is in a contraction state, the microphone has a large sound source collection range angle, the microphone can be used as a near-speaking microphone, the sound pick-up frequency range is wide, the sound pick-up quality is high, and the microphone is convenient to carry; when interfering pipe 2 and being in the second pickup position that stretches out length longest for adapter housing 1, interfere pipe 2 and stretch out outward completely for adapter housing 1, can regard as strong directive property microphone to use, the pickup distance is far away, and anti noise is disturbed to the microphone can switch at close range full frequency pickup and remote vocal pickup according to the pickup demand, can satisfy the pickup demand of different scenes.

In this embodiment, a sliding groove 3 is provided on a pipe wall of the sound pickup housing 1 along a length direction of the sound pickup housing 1, and a slider structure (not shown) slidably engaged with the sliding groove 3 is provided on an inner wall of the interference pipe 2. The mode of relative axial sliding of the two is realized through the sliding block structure and the sliding groove 3, the structure is simple, and the realization is easy. In an alternative embodiment, an external thread may be provided on the outer wall of the sound pickup housing 1, and an internal thread may be provided on the inner wall of the interference tube 2 to adjust the protruding length of the interference tube 2 relative to the sound pickup housing 1.

Specifically, the end of the sliding groove 3 is provided with a buckle structure 4, and the sliding block structure is provided with a buckle head which can be buckled with the buckle structure 4. The stability of interfering pipe 2 and the 1 connection structure of adapter housing can be improved to buckle structure 4 and the setting of the knot body, and then the audio acquisition quality of microphone is improved.

In this embodiment, the inner wall of the interference tube 2 is further provided with a moving contact moving synchronously with the interference tube 2, two stationary contacts which are arranged corresponding to the position of the chute 3 and can be electrically contacted with the moving contact are arranged in the cavity of the sound pickup housing 1, and the two stationary contacts are respectively connected with different electrical signal conversion and processing circuits. Preferably, the two fixed contacts are respectively located at two ends of the sliding chute, one of the fixed contacts is correspondingly arranged at the first sound pickup position, and the other fixed contact is correspondingly arranged at the second sound pickup position. When the moving contact is contacted with two fixed contacts at different positions, the audio signals collected by the microphone can be subjected to signal conversion processing through different circuits, so that the sound pickup effect of the microphone under two different sound pickup modes is respectively improved; compared with the prior art, the mode that the sound pickup mode of the microphone is changed by arranging the additional keys on the microphone realizes the integrated design of the expansion of the interference tube 2 and the adjustment of the sound pickup mode, and the structure is simpler.

In the present embodiment, a plurality of interference holes 5 symmetrically arranged along the axial direction of the interference tube 2 are opened on the tube wall of the interference tube 2. External sound source can get into in interfering pipe 2 through interfering hole 5, interference hole 5 that the symmetry set up plays the interference effect to sound, when the sound wave comes from aiming at interfering pipe 2 direction (0 degree), all sound signals that get into interfering pipe 2 from each interference hole 5 will arrive the vibrating diaphragm of miaow head simultaneously, therefore there is not phase interference, interfere pipe 2 and obtain the maximum output, when the sound wave comes from side direction (theta angle), the path length that the sound wave reachd the vibrating diaphragm of miaow head passed through is different, the sound signal that each interference hole 5 got into has the phase difference, form phase interference in vibrating diaphragm department, lead to vibrating diaphragm department acoustic pressure to obtain the decay, thereby obtain strong directive property.

Further, in order to make the sound pressure attenuation of the sound signal entering through each interference hole 5 when reaching the diaphragm of the microphone larger and obtain a microphone with stronger directivity, the interference holes 5 are semi-circular arc-shaped holes and the centers of the interference holes 5 located on the same side are on the same straight line.

In this embodiment, the top cover of interfering pipe 2 relative to the one end of pickup housing 1 is equipped with metal mesh enclosure 6, and the inboard of metal mesh enclosure 6 is provided with the sponge, and metal mesh enclosure 6 and sponge can play the protection and reduce the effect that outside sound signal disturbed. In particular, the metal mesh cover 6 may be beveled, i.e. at an angle of 20-60 ° to the radial plane of the interference tube 21. Of course, other net structures with sufficient strength may be used for the metal mesh cover 6 as required.

In the present embodiment, the top portion of the microphone case 1 at the end connected to the interference tube 2 has a tapered portion whose diameter gradually decreases toward the interference tube 2. The one end design of adapter casing 1 is the tapered head, makes the curve of microphone inside wall more level and smooth, forms a baffle, is favorable to the sound wave to form phase place at miaow head vibrating diaphragm department and interferes. The peripheral wall of the end, back to the interference tube 2, of the sound pick-up shell 1 is provided with a groove, and the microphone holder can be clamped on the groove of the sound pick-up shell 1, so that a microphone can be conveniently fixed at a certain specific position, and the sound pick-up requirements of remote occasions in teaching, speech, conferences and the like are met.

In this embodiment, the pickup housing 1 and the interference tube 2 are made of aluminum material which has no interference from an additional magnetic field and is light in weight as a whole, and the overall weight of the microphone can be controlled to a smaller extent.

In summary, the embodiment of the present invention provides a multifunctional noise reduction microphone, by contracting or extending the interference tube 2, when the interference tube 2 is located at the first pickup position with the shortest extension length relative to the pickup housing 1, the microphone can be used as a near-speaking microphone, and the microphone has a wide pickup frequency range, high pickup quality, and is also convenient to carry; when interfering pipe 2 and being in the second pickup position that stretches out length longest for adapter housing 1, interfere pipe 2 and stretch out outward completely for adapter housing 1, can regard as strong directive property microphone to use, the pickup distance is far away, and anti noise is disturbed to the microphone can switch at close range full frequency pickup and remote vocal pickup according to the pickup demand, can satisfy the pickup demand of different scenes.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A multi-functional noise-reducing microphone, comprising:

the pickup shell (1) is of a cylindrical columnar structure with a cavity inside, and a noise reduction control circuit board is fixed inside the pickup shell;

the microphone is connected to one end of the sound pick-up shell (1) and is electrically connected with the noise reduction control circuit board;

the interference tube (2) is axially sleeved on one end, provided with the microphone, of the sound pick-up shell (1) in a sliding manner along the length direction of the sound pick-up shell (1); the interference tube (2) is provided with a first sound pickup position for realizing close-distance sound pickup and a second sound pickup position for realizing remote sound pickup in the process of sliding along the length direction of the sound pickup shell (1).

2. The multifunctional noise reduction microphone according to claim 1, wherein a sliding groove (3) is formed in a pipe wall of the sound pickup housing (1) and arranged along a length direction of the sound pickup housing (1), and a sliding block structure in sliding fit with the sliding groove (3) is arranged on an inner wall of the interference pipe (2).

3. The multifunctional noise reduction microphone according to claim 2, wherein the inner wall of the interference tube (2) is provided with a movable contact that moves synchronously with the interference tube (2), two stationary contacts that are respectively disposed at two opposite ends of the chute (3) and electrically contact with the movable contact are disposed in the cavity of the pickup housing (1), and both of the stationary contacts are electrically connected to the noise reduction control circuit board; the moving contact is connected with different fixed contacts to switch the pickup mode of the pickup.

4. The multifunctional noise reduction microphone according to claim 2, wherein a buckle structure (4) is disposed at an end of the sliding groove (3), and a buckle head capable of being buckled with the buckle structure (4) is disposed on the slider structure.

5. The multifunctional noise reduction microphone according to claim 1, wherein the interference tube (2) has a plurality of interference holes (5) formed on the wall thereof, the interference holes being symmetrically arranged along the axial direction of the interference tube (2).

6. A multifunctional noise-reducing microphone according to claim 5, characterized in that the centers of the interference holes (5) located on the same side are on a straight line.

7. A multifunctional noise-reducing microphone according to claim 5, characterized in that the interference hole (5) is a semicircular hole opened in the peripheral wall of the interference tube (2).

8. The multifunctional noise reduction microphone according to claim 1, wherein the interference tube (2) is covered with a metal mesh (6) at the top of the end opposite to the sound pickup housing (1).

9. A multifunctional noise-reducing microphone according to claim 1, characterized in that the peripheral wall of the end of the microphone housing (1) facing away from the interference tube (2) is provided with a groove, and the microphone holder can be clamped on the groove of the microphone housing (1).

10. The multifunctional noise reduction microphone according to claim 1, wherein the top of the end of the sound collector shell (1) connected to the interference tube (2) has a tapered portion with a diameter gradually decreasing toward the interference tube (2).