CN212463460U

CN212463460U - Sound box and microphone integrated machine capable of preventing squeaking

Info

Publication number: CN212463460U
Application number: CN202021625953.4U
Authority: CN
Inventors: 王雪英
Original assignee: Beijing Shengchen Technology Co ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-02-02
Anticipated expiration: 2030-08-07

Abstract

The sound box and microphone integrated machine comprises a sound box unit, a microphone unit and a handle unit, wherein the microphone unit and the handle unit are respectively arranged on the top surface and the bottom surface of the sound box unit along the vertical center line of the sound box unit; the sound box unit comprises an outer shell, an inner shell fixed in the outer shell and a pair of full-frequency loudspeakers embedded into the left side wall and the right side wall of the inner shell respectively, the sound production surfaces of the full-frequency loudspeakers are back to the vertical central line of the sound box unit, and the sound production surfaces of the full-frequency loudspeakers incline downwards; a first shock absorbing part for offsetting the vertical shock is arranged between the bottom surface of the inner shell and the bottom surface of the outer shell; a centrally arranged driven plate is arranged on the bottom surface of the inner shell; the microphone unit comprises a sound head seat arranged along the vertical center line of the sound box unit, and a microphone sound head is arranged at the end of the sound head seat; the microphone is characterized by further comprising a microphone support fixed on the top surface of the shell, the sound head seat is arranged on the microphone support, and a second shock absorbing piece for offsetting vibration in the vertical direction is padded between the contact surfaces of the sound head seat and the microphone support. The utility model discloses do benefit to and restrain the feedback noise, improved tone quality.

Description

Sound box and microphone integrated machine capable of preventing squeaking

Technical Field

The utility model relates to an electroacoustic technology field specifically discloses a prevent audio amplifier microphone all-in-one of whistling.

Background

It is known that the sound system for microphone pickup has the possibility of feedback howling, the power amplifier will generate a large power output when the howling is self-excited, which may exceed the bearing range of the equipment to cause element burnout, and the sound amplification sound field will become narrower than the original sound field in sound sense, even generate obvious sound distortion, and seriously affect the order and atmosphere of the use site.

In addition to configuring an equalizer and a feedback suppressor on hardware, a distance adjustment method may be adopted in order to eliminate feedback howling in a sound system in which a microphone picks up sound, that is, the farther the microphone is from a speaker, the better the speaker is, the closer the speaker is to a listener, and the microphone is arranged on the back side of the radiation direction of the speaker.

The integrated machine of sound box and microphone is a new type of electroacoustic equipment which is recently developed, and is a portable sound system which is designed by integrating sound box and microphone and has microphone for picking up sound. In view of the miniaturized and portable design of the product architecture of the speaker microphone, it is not feasible to configure an equalizer and a feedback suppressor to eliminate feedback howling, and the distance adjustment method is directly limited by the product volume and is not easy to implement.

In summary, a more effective and feasible technical scheme for eliminating feedback squeal is urgently needed for the integrated machine of the sound box and the microphone.

SUMMERY OF THE UTILITY MODEL

In order to satisfy the above-mentioned demand of prior art, the utility model provides a prevent audio amplifier microphone all-in-one of squeaking, it has adopted following technical scheme.

The integrated machine comprises a sound box unit, a microphone unit and a handle unit, wherein the microphone unit and the handle unit are respectively arranged on the top surface and the bottom surface of the sound box unit along the vertical center line of the sound box unit;

the sound box unit comprises an outer shell, an inner shell fixed in the outer shell and a pair of full-frequency loudspeakers embedded into the left side wall and the right side wall of the inner shell respectively, the sound production surfaces of the full-frequency loudspeakers are back to the vertical central line of the sound box unit, and the sound production surfaces of the full-frequency loudspeakers incline downwards; a first shock absorbing piece for offsetting vibration in the vertical direction is arranged between the bottom surface of the inner shell and the bottom surface of the outer shell, and first EVA sealing pieces which surround the full-frequency loudspeaker and are tightly matched with the inner wall of the outer shell are respectively arranged on the left side wall and the right side wall of the inner shell; a driven plate arranged in the middle is arranged on the bottom surface of the inner shell, and a bass window for exposing the driven plate is arranged on the bottom surface of the outer shell;

the microphone unit comprises a sound head seat arranged along the vertical center line of the sound box unit, and a microphone sound head is arranged at the end of the sound head seat; the microphone is characterized by also comprising a microphone support fixed on the top surface of the shell, wherein the sound head seat is arranged on the microphone support, and a second shock absorbing part for offsetting the vibration in the vertical direction is arranged between the contact surfaces of the sound head seat and the microphone support; a microphone mesh enclosure for covering the sound head seat and the sound head of the microphone is arranged at the top of the microphone support, and an anti-spray cover is covered on the inner wall of the microphone mesh enclosure;

the handle unit comprises a handle support covering the bass window and a handle body formed at the lower part of the handle support; a plurality of sound holes used for being opposite to the driven plate are densely distributed on the handle support, and a second EVA sealing piece which surrounds the bass window and is tightly matched with the bottom surface of the shell is arranged on the top surface of the handle support; the internal shaping of handle has the battery chamber of axial setting, and the battery chamber is equipped with the lithium cell for microphone sound head and full frequency loudspeaker power supply.

Compared with the prior art, the beneficial effects of the utility model reside in that:

(1) the sound production surface of the full-frequency loudspeaker faces back to the vertical center line of the sound box unit, the sound production surface of the full-frequency loudspeaker inclines downwards, feedback noise suppression is facilitated, and the sound output direction of the loudspeaker is more in line with the height difference between a user and a field listener;

(2) the microphone unit and the handle unit are arranged along the vertical center line of the sound box unit, and the shock absorbing parts for offsetting the vertical vibration are arranged at a plurality of positions, so that the influence of upward transmission on the microphone unit when the sound box unit generates sound and vibrates is weakened to a greater extent, and the suppression of feedback noise is facilitated;

(3) the sound box unit is provided with a sealing element for the full-frequency loudspeaker and the passive plate, and the sound cavity sealing effect is improved, so that the pushing effect of the passive plate is promoted, and the sound quality is improved.

The present invention will be further described with reference to the drawings and the detailed description.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a schematic structural view of the handle unit of the present invention.

Fig. 4 is a schematic structural diagram of the middle speaker unit of the present invention.

Detailed Description

In the embodiment shown in fig. 1 to 4, the integrated speaker and microphone device for preventing howling includes a speaker unit 1, and a microphone unit 2 and a handle unit 3 respectively installed on the top surface and the bottom surface of the speaker unit 1 along the vertical center line of the speaker unit 1, wherein the microphone unit 2 picks up the sound of a user and transmits the sound to the speaker unit 1 for sound amplification playing;

the sound box unit 1 comprises an outer shell 11, an inner shell 12 fixed in the outer shell 11 and a pair of full-frequency loudspeakers 13 respectively embedded in the left and right side walls of the inner shell 12, wherein the sound production surfaces of the full-frequency loudspeakers 13 are back to the vertical central line of the sound box unit 1, and the sound production surfaces of the full-frequency loudspeakers 13 incline downwards; a first shock absorbing part 121 for offsetting the vibration in the vertical direction is arranged between the bottom surface of the inner shell 12 and the bottom surface of the outer shell 11, and first EVA sealing parts 122 which surround the full-frequency loudspeaker 13 and are tightly matched with the inner wall of the outer shell 11 are respectively arranged on the left side wall and the right side wall of the inner shell 12; a centrally arranged passive plate 14 is arranged on the bottom surface of the inner shell 12, and a bass window 111 for exposing the passive plate 14 is arranged on the bottom surface of the outer shell 11;

the microphone unit 2 comprises a sound head seat 21 arranged along the vertical central line of the sound box unit 1, and a microphone sound head 22 is arranged at the end of the sound head seat 21; the microphone comprises a microphone support 23 fixed on the top surface of the shell 11, a sound head seat 21 is arranged on the microphone support 23, and a second shock absorbing part 24 for offsetting the vibration in the vertical direction is arranged between the contact surfaces of the sound head seat 21 and the microphone support 23; a microphone mesh enclosure 25 for housing the sound head seat 21 and the microphone sound head 22 is arranged on the top of the microphone support 23, and an anti-spray cover 26 is covered on the inner wall of the microphone mesh enclosure 25;

the handle unit 3 includes a handle rest 31 covering the bass window 111, and further includes a handle body 32 formed at a lower portion of the handle rest 31; a plurality of sound holes 311 corresponding to the driven plate 14 are densely distributed on the handle holder 31, and a second EVA sealing piece 312 surrounding the low-sound window 111 and tightly matched with the bottom surface of the shell 11 is arranged on the top surface of the handle holder 31; an axially arranged battery cavity 321 is formed in the handle body 32, and the battery cavity 321 is provided with a lithium battery 33 for supplying power to the microphone sound head 22 and the full-frequency loudspeaker 13.

In the sound box and microphone integrated machine for preventing howling in the scheme, the sound production surface of the full-frequency loudspeaker 13 is back to the vertical central line of the sound box unit 1, and the sound production surface of the full-frequency loudspeaker 13 inclines downwards, so that feedback noise can be inhibited, and the sound output direction of the loudspeaker is more in line with the height difference between a user and a field listener; moreover, the microphone unit 2 and the handle unit 3 are arranged along the vertical central line of the sound box unit 1, and a plurality of shock absorbing parts for offsetting the vertical shock are arranged, so that the influence of upward transmission on the microphone unit 2 when the sound box unit 1 generates sound and shocks is weakened to a greater extent, and the suppression of feedback noise is facilitated;

for the utility model discloses a prevent loudspeaker box microphone all-in-one of squeaking, because the restriction of volume, the full frequency loudspeaker 13 specification that uses is less, generally uses 2 inches or loudspeaker below 2 inches, so, because the bore of loudspeaker vibrating diaphragm is too little, its every vibration, the air volume that promotes is just few, and the low volume of audio amplifier feels and has direct relation with the air volume that the loudspeaker promoted, so there is the not enough of bass deficiency, and passive plate 14 has solved this problem betterly; because the passive plate 14 and the full-range horn 13 are installed on the sealed inner shell 12, when the full-range horn works to make a sound, the movement of the horn diaphragm can cause the air in the inner shell 12 to be compressed and expanded, and under the action of the change of the air pressure, the passive plate 14 generates vibration to push the external air, so that the bass can be sent out through the sound hole 311 on the handle support 31; because the driven plate 14 is designed at the bottom of the inner shell 12, the sound production surface is opposite to the microphone unit 2, which is beneficial to inhibiting feedback squeal;

in addition, the sound box unit 1 is provided with the sealing elements for the full-range speaker 13 and the passive plate 14 through the first EVA sealing element 122 and the second EVA sealing element 312, respectively, so that the sound cavity sealing effect is improved, the pushing effect of the passive plate 14 is promoted, and the sound quality is improved.

In the above-mentioned sound box and microphone integrated machine for preventing whistling, the second shock absorbing member 24 may be made of EVA.

In a preferred embodiment, as shown in fig. 2 and 4, the first shock absorbing member 121 is a silica gel member with an i-shaped longitudinal section, four legs of the inner shell 12 are respectively formed with a support piece with a C-shape and an outward opening along the horizontal direction, and the waist of the first shock absorbing member 121 is embedded in the support piece.

In a preferred embodiment, the area of the working surface of the passive plate 14 is larger than the area of the sound emission surface of the full-range horn 13. Because the driven plate 14 is designed at the bottom of the inner shell 12, the vibration area can be made larger, the volume of the pushing air is increased, the bass volume is greatly improved, meanwhile, the caliber of the driven plate 14 is increased, the frequency of a resonance product can be reduced, and the sound box can obtain better bass diving depth when sounding.

In a preferred embodiment, as shown in fig. 2, the control circuit board 15 is mounted on the front wall of the inner casing 12 by screws, the key switch 151 is disposed on the outer side surface of the control circuit board 15, the outer casing 11 is provided with an elastic key cap 110 engaged with the key switch 151, and a key silicone gasket 152 is disposed between the key switch 151 and the engaged elastic key cap 110. The key silicone gasket 152 enhances the operation reliability of the key switch 151 on one hand, and provides a damping buffer between the control circuit board 15 and the housing 11 on the other hand, which is beneficial to suppressing feedback squeal.

In a preferred embodiment, as shown in fig. 2, a weight block 322 is disposed in the battery cavity 321, the weight block 322 has a tubular structure for filling the lithium battery 33, a top portion of the weight block 322 is fixed on the handle holder 31, and a third shock absorbing member 323 for counteracting vertical vibration is disposed between an inner wall of a cup bottom of the weight block 322 and a bottom surface of the lithium battery 33. In the above improved scheme, the third suspension element 323 may also be made of EVA, so that it can counteract the vertical vibration, and further suppress the feedback squeal.

In a preferred embodiment, as shown in fig. 2, the sound head base 21 includes a sound head plastic fixing base 211 and a sound head silicone fixing base 212 coaxially matched along a vertical center line of the sound box unit 1;

the sound head plastic fixing seat 211 is formed by plastic and is provided with a base 211a arranged on the microphone support 23, the top surface of the base 211a is raised in a conical shape, and a plurality of supports 211b which are symmetrically distributed around a vertical central line are formed upwards on the top surface of the base 211 a;

the sound head silica gel fixing seat 212 is formed by silica gel, the top surface of the sound head is used for installing a microphone sound head, and the bottom surface of the sound head is detachably connected to the top end of the support 211 b. The sound head silicone fixing seat 212 is a well-known sound head damping support for supporting and mounting a microphone sound head and simultaneously performing damping and buffering on the microphone sound head.

In the above improved scheme, the top surface of the base 211a is raised in a conical shape, and forms a reflecting surface which diverges from the central axis to the outside, so that the reflected sound waves absorbed by the microphone sound head 22 can be effectively reduced, and the feedback whistling can be favorably suppressed.

In a preferred embodiment, as shown in fig. 1 to 2, the casing 11 is covered with a speaker cover 16, and the microphone unit 2 and the handle unit 3 are exposed outside through the speaker cover 16. The enclosure cloth 16 serves to protect the enclosure and provide a decorative effect.

In a preferred embodiment, as shown in fig. 2, the outer shell 11 and the inner shell 12 are both realized by a structure formed by buckling a left shell and a right shell, so that a more compact assembly structure is realized, and the mold opening manufacturing is facilitated.

For those skilled in the art, the protection scope of the present invention is not limited to the details of the above-described exemplary embodiments, and all the embodiments with variations within the scope and meaning equivalent to the elements of the present invention should be included in the present invention without departing from the spirit or essential characteristics of the present invention.

Claims

1. The integrated machine comprises a sound box unit, a microphone unit and a handle unit, wherein the microphone unit and the handle unit are respectively arranged on the top surface and the bottom surface of the sound box unit along the vertical center line of the sound box unit;

the method is characterized in that:

2. A whistle-preventing speaker-microphone all-in-one machine as claimed in claim 1, characterized in that:

the first shock absorbing part is a silica gel part with an I-shaped longitudinal section, a support sheet with a C-shaped outward opening is formed on each of four legs of the inner shell along the horizontal direction, and the waist of the first shock absorbing part is embedded in the support sheet.

3. A whistle-preventing speaker-microphone all-in-one machine as claimed in claim 1, characterized in that:

the area of the working surface of the passive plate is larger than that of the sound production surface of the full-frequency horn.

4. A whistle-preventing speaker-microphone all-in-one machine as claimed in claim 1, characterized in that:

the front wall of the inner shell is provided with a control circuit board through a screw, the outer side surface of the control circuit board is provided with a key switch, the outer shell is provided with an elastic key cap matched with the key switch, and a key silica gel gasket is padded between the key switch and the matched elastic key cap.

5. A whistle-preventing speaker-microphone all-in-one machine as claimed in claim 1, characterized in that:

the cell cavity is internally provided with a balancing weight which is coaxially matched with the cell cavity, the balancing weight is provided with a tubular structure for filling the lithium cell, the top of the balancing weight is fixed on the handle support, and a third shock-absorbing part for offsetting the vibration in the vertical direction is further cushioned between the inner wall of the cup bottom of the balancing weight and the bottom surface of the lithium cell.

6. A whistle-preventing speaker-microphone all-in-one machine as claimed in claim 1, characterized in that:

the sound box base comprises a sound head plastic fixing base and a sound head silica gel fixing base which are coaxially matched along the vertical central line of the sound box unit;

the sound head plastic fixing seat is formed by plastic, and is provided with a base arranged on the microphone bracket, the top surface of the base is raised in a conical shape, and a plurality of brackets which are symmetrically distributed around a vertical central line are formed on the top surface of the base;

the sound head silica gel fixing seat is formed by silica gel, the top surface of the sound head is used for installing a microphone sound head, and the bottom surface of the sound head is detachably connected to the top end of the support.

7. A whistle-preventing speaker-microphone unity machine as claimed in any one of claims 1 to 6, characterized in that: the shell is covered with a sound box wrapping cloth, and the microphone unit and the handle unit penetrate out of the sound box wrapping cloth to be exposed outside.