CN215344997U - Active noise reduction earphone capable of preventing box-in squeaking - Google Patents

Abstract

The utility model discloses an active noise reduction earphone for preventing box-in squeaking, which belongs to the technical field of noise reduction earphones and comprises a charging box and two earphones, wherein the two earphones are symmetrical to each other, one end of each earphone is provided with a loudspeaker, the outsides of the loudspeakers are sleeved with earplugs, the lower ends of the two earphones are provided with noise reduction microphones, the interiors of the two earphones are provided with hardware filters, the upper end of the charging box is connected with a box cover, the insides of the charging box are symmetrically provided with placing cavities in the left and right directions, the placing cavities on the two sides are respectively matched with the two earphones, the bottom of the placing cavity is provided with a squeaking preventing hole, the total transfer function of a loop can be far away from the numerical condition of generating the squeaking, so that the closed-loop gain of the earphones when the earphones are placed in the box can be far away from the squeaking range, the service life and the use effect of the earphones are improved, and the acoustic problem is solved by an acoustic scheme, the noise reduction and permeation effect is not required to be lost, and an additional detection sensor is not required.

Description

Active noise reduction earphone capable of preventing box-in squeaking

Technical Field

The utility model relates to the technical field of noise reduction earphones, in particular to an active noise reduction earphone capable of preventing box-in howling.

Background

The earphone is a pair of conversion units which receive the electric signals from the media player or receiver and convert them into audible sound waves by using a speaker near the ear. The earphone has the advantages that the earphone can listen to the sound independently without influencing other people; can also isolate the sound of the surrounding environment, and is very helpful for people who use in a noisy environment such as a recording studio, a bar, a trip, sports, and the like.

The noise reduction earphone is an earphone which reduces noise by using a certain method. The active noise reduction function is to generate reverse sound waves equal to external noise through a noise reduction system to neutralize the noise, so that the noise reduction effect is realized. From the development of the whole audio industry, the development time of the wireless headset is not long, and at present, the user demand is continuously improved in an ascending period, and the expected value of the user on the wireless headset is also improved, which is a new test put forward to the industry.

The noise reduction earphone has the microphone and the loudspeaker at the same time, and microphone signals can be communicated to the loudspeaker through the circuit in certain states (noise reduction mode and transparent mode), the microphone signals and sound loops of the external loudspeaker, air and the microphone form a closed loop together, when a closed loop transfer function meets a certain condition, sound of certain frequency bands can be continuously amplified to form howling, and therefore the service life of the earphone is influenced, and the using effect of a user is further influenced.

Due to the functional requirements, the transfer functions of the circuit part during the penetrating and noise reduction work are limited to a great extent, the problem of squeaking in the box is solved mainly by adjusting the transfer functions of the circuit part or by a noise reduction or penetrating method during the closing of the box through software at present, the first mode tends to lose the noise reduction penetrating effect during wearing, and the second mode requires a corresponding sensor on the earphone to be called and possibly has a misjudgment condition.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

Aiming at the problems in the prior art, the utility model aims to punch holes at the corresponding position of a charging box and calculate, verify and adjust the size, provides the calculation of an acoustic model when the charging box is put into the box, can realize the purposes of not influencing the acoustic model when being worn, keeping away from a squeaking range, not losing the noise reduction penetrating effect when being worn, does not need to borrow a special detection sensor and has wide applicability.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

The utility model provides a prevent into earphone of making an uproar falls in initiative of box squeaking, includes charging box and two earphones, two mutual symmetry between the earphone is two the speaker is all installed to the one end of earphone, the outside cover of speaker is equipped with the earplug, two the microphone of making an uproar falls is all installed to the lower extreme of earphone, two the inside hardware filter that all installs of earphone, charging box upper end is connected with the lid, the lid passes through round pin axle swing joint with the box that charges, the inside bilateral symmetry of charging box has been seted up and has been placed the cavity, both sides place the cavity and cooperate with two earphones respectively, the bottom of placing the cavity has been seted up and has been prevented the hole of squealing, prevent the hole of squealing and fall the microphone lower extreme position of making an uproar and correspond, the inside bilateral symmetry of lid has been seted up and has been held the cavity.

Further, two cardboards of lid front end fixedly connected with, the front end fixedly connected with of box that charges is a plurality of telescopic links, and is a plurality of the front end fixedly connected with limiting plate of telescopic link, limiting plate and the fixedly connected with spring between the box that charges, the telescopic link outside is located to the spring housing, limiting plate lower extreme fixedly connected with presses the briquetting, can fix box and lid that charges through limiting plate and cardboard, and fixed effectual has avoided current lid to turn over the phenomenon of rolling over suddenly and opening to further protect the earphone, the practicality is strong.

Further, the protection shield is installed to the box upper end bilateral symmetry that charges, through having between protection shield and the box that charges to hinder hinged joint, the inside protection cavity of having seted up of protection shield, both sides the protection cavity can cooperate the use with two earphones respectively, can further protect the earphone through the protection cavity, not only can avoid when the lid is opened the earphone to intake and cause the damage, can avoid the earphone to drop when the lid is unexpected to be opened moreover, has effectively protected the earphone, has improved the protective effect of the box that charges to the box that charges.

Further, the inner wall of the accommodating cavity is provided with pearl cotton and two sides, the pearl cotton is respectively positioned at the tops of the two earphones, the tops of the two earphones can be protected by the pearl cotton, and the service lives of the two earphones are effectively prolonged.

Furthermore, the outer end surface mounting of earplug has the filter screen, and the interception impurity effect is strong, avoids dust impurity to get into and causes the influence to the speaker.

Further, four are no less than to the quantity of telescopic link, guarantee the mobility stability of limiting plate, the quantity of telescopic link and spring equals.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages that:

(1) according to the scheme, the size of the anti-howling hole is adjusted through sound cavity simulation or physical test, the transfer function from the loudspeaker to the noise reduction microphone when the earphone is placed into the box is obtained through sound cavity simulation or acoustic test, the total transfer function of the loop is kept away from the numerical condition of howling, the closed loop gain when the earphone is placed into the box is kept away from the howling range, the howling when the earphone is placed into the box is effectively prevented, the service life of the earphone is prolonged, and the use effect of a user is improved.

(2) This scheme is with acoustics scheme solution acoustics problem, need not to lose and falls the penetrating effect of making an uproar, need not additionally to detect the sensor, labour saving and time saving, convenient to use to avoid there being the condition of erroneous judgement.

(2) This scheme can be fixed charging box and lid through limiting plate and cardboard, and is fixed effectual, has avoided current lid to turn over suddenly and has rolled over the phenomenon of opening to further protect the earphone, the practicality is strong.

(3) This scheme can be further protected the earphone through the protection cavity, not only can avoid the earphone to intake when the lid is opened and cause the damage, can avoid the earphone to drop when the lid accident is opened moreover, has effectively protected the earphone, has improved the protective effect of the box that charges to the box that charges.

(4) This scheme passes through filter screen interception impurity, avoids dust impurity to get into and causes the influence to the speaker.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a side view, partially in section, of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic axial side view in partial cross-section of the present invention;

FIG. 5 is an enlarged schematic view of the present invention from a top view;

FIG. 6 is a schematic view of the lid of the present invention after being closed;

fig. 7 is a schematic structural diagram of a closed-loop module according to the present invention.

The reference numbers in the figures illustrate:

the earphone comprises a charging box 1, an earphone 2, a loudspeaker 3, earplugs 4, a noise reduction microphone 5, a box cover 6, a placing cavity 7, a howling prevention hole 8, a containing cavity 9, a clamping plate 10, a telescopic rod 11, a limiting plate 12, a spring 13, a pressing block 14, a protecting plate 15, a protecting cavity 16 and pearl wool 17.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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 should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1-7, an active noise reduction earphone for preventing whistling in a box comprises a charging box 1 and two earphones 2, wherein the two earphones 2 are symmetrical to each other, a speaker 3 is installed at one end of each of the two earphones 2, an earplug 4 is sleeved outside the speaker 3, a filter screen is installed on the outer end surface of the earplug 4, the filter screen is made of stainless steel wires by weaving, the effect of intercepting impurities is strong, and the influence of dust and impurities on the speaker 3 is avoided, noise reduction microphones 5 are installed at the lower ends of the two earphones 2, a hardware filter is installed inside each of the two earphones 2, a box cover 6 is connected to the upper end of the charging box 1, the box cover 6 is movably connected with the charging box 1 through a pin shaft, placing cavities 7 are symmetrically arranged in the charging box 1, the placing cavities 7 on both sides are respectively matched with the two earphones 2, whistling preventing holes 8 are formed in the bottom of the placing cavities 7, the whistling preventing holes 8 correspond to the lower ends of the noise reduction microphones 5, the inside bilateral symmetry of lid 6 has been seted up and has been held cavity 9, and the cotton 17 of pearl is installed to the inner wall that holds cavity 9, and the cotton 17 of both sides pearl is located the top of two earphones 2 respectively, can protect the top of two earphones 2 through the cotton 17 of pearl, effectively improves the life of two earphones 2.

Please refer to fig. 1, 2, 4, 6, two cardboard 10 of 6 front end fixedly connected with of lid, a plurality of telescopic links 11 of the front end fixedly connected with of box 1 charges, the front end fixedly connected with limiting plate 12 of a plurality of telescopic links 11, limiting plate 12 and the box 1 that charges between fixedly connected with spring 13, 11 outsides of telescopic link are located to spring 13 cover, limiting plate 12 lower extreme fixedly connected with presses briquetting 14, four are no less than to the quantity of telescopic link 11, guarantee limiting plate 12's mobility stability, the quantity of telescopic link 11 and spring 13 equals.

Please refer to fig. 1 and 4, the protection plates 15 are symmetrically installed on the left and right sides of the upper end of the charging box 1, the protection plates 15 are connected with the charging box 1 through a hinge with a resistor, a protection cavity 16 is arranged inside the protection plates 15, the protection cavities 16 on the two sides can be respectively matched with the two earphones 2 for use, the earphones 2 can be further protected through the protection cavity 16, not only can the damage caused by the water entering of the earphones when the box cover 6 is opened be avoided, but also the earphones 2 can be prevented from falling when the box cover is accidentally opened, the earphones 2 are effectively protected, and the protection effect of the charging box 1 on the charging box is improved.

The working principle is as follows: firstly, determining noise reduction through filtering parameters which are written when the earphone is worn, then writing the noise reduction through filtering parameters which need to be configured, locally opening anti-howling holes 8 at the bottom of a cavity 7 of a charging box 1, and locating at the position below a noise reduction microphone 5 when the anti-howling holes 8 are formed, then adjusting the size of the anti-howling holes 8 by performing sound cavity simulation or physical test, obtaining a transfer function from a loudspeaker to the noise reduction microphone when the earphone 2 is put into the box by sound cavity simulation or acoustic test, and combining with a circuit part transfer function in a noise reduction or through mode, enabling the total transfer function of a loop to be far away from the numerical condition for generating howling, so that the closed-loop gain when the earphone 2 is put into the box is far away from the howling range, and effectively preventing the earphone 2 from being put into the box. Thereby improving the service life of the earphone 2 and the use effect of the user. The acoustic problem is solved by the acoustic scheme, the noise reduction penetrating effect is not required to be lost, an additional detection sensor is not required, time and labor are saved, the use is convenient, and the condition of misjudgment is avoided.

When using, put into placing cavity 7 of both sides respectively with two earphones 2, then rotatory protection shield 15 that rotates for protection shield 15 and the box 1 upper end parallel and level that charges, 2 tops of earphone are in inside protection cavity 16 this moment, can be to the further protection of earphone 2 through protection cavity 16, not only can avoid the earphone to intake when lid 6 is opened and cause the damage, and can be when the lid accident is opened, avoid earphone 2 to drop, earphone 2 has effectively been protected, the protective effect of box 1 to the box that charges has been improved.

Then rotate lid 6 again and cover the box 1 that charges, lid 6 drives cardboard 10 extrusion limiting plate 12 this moment to limiting plate 12 drives telescopic link 11 and removes and compression spring 13, and after a locating position, spring 13 can drive limiting plate 12 and remove and block fixedly with cardboard 10, can fix the box 1 and lid 6 that charge, and is fixed effectual, has avoided current lid 6 to turn over suddenly and has rolled over the phenomenon of opening, thereby has further protected earphone 2, and the practicality is strong.

When lid 6 is opened to needs, the accessible is pressed according to briquetting 14 with the hand, drives limiting plate 12 this moment and removes, and compression telescopic link 11 and spring 13 finally make limiting plate 12 break away from cardboard 10, can separate lid 6 and the box 1 that charges this moment, can rotate to open lid 6, open simple and convenient, labour saving and time saving.

The foregoing is only a preferred embodiment of the present invention; the scope of the utility model is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims (6)

1. An active noise reduction earphone for preventing in-box howling, comprising a charging box (1) and two earphones (2), characterized in that: the two earphones (2) are symmetrical to each other, one end of each earphone (2) is provided with a loudspeaker (3), the earplugs (4) are sleeved outside the loudspeaker (3), noise reduction microphones (5) are respectively arranged at the lower ends of the two earphones (2), hardware filters are respectively arranged inside the two earphones (2), the upper end of the charging box (1) is connected with a box cover (6), the box cover (6) is movably connected with the charging box (1) through a pin shaft, the charging box (1) is provided with placing cavities (7) in bilateral symmetry, the placing cavities (7) on two sides are respectively matched with the two earphones (2), the bottom of the placing cavity (7) is provided with a whistling prevention hole (8), the whistling prevention hole (8) corresponds to the lower end of the noise reduction microphone (5), the box cover (6) is provided with accommodating cavities (9) in bilateral symmetry.

2. The active noise reduction earphone for preventing in-box howling as claimed in claim 1, wherein: two cardboard (10) of lid (6) front end fixedly connected with, the front end fixedly connected with of box (1) that charges is a plurality of telescopic links (11), and is a plurality of the front end fixedly connected with limiting plate (12) of telescopic link (11), fixedly connected with spring (13) between limiting plate (12) and the box (1) that charges, telescopic link (11) outside is located to spring (13) cover, limiting plate (12) lower extreme fixedly connected with presses briquetting (14).

3. The active noise reduction earphone for preventing in-box howling as claimed in claim 1, wherein: protection shield (15) are installed to the left and right sides symmetry in charging box (1) upper end, through having between protection shield (15) and charging box (1) hinder hinged joint, protection cavity (16), both sides have been seted up to protection shield (15) inside protection cavity (16) can cooperate the use with two earphone (2) respectively.

4. The active noise reduction earphone for preventing in-box howling as claimed in claim 1, wherein: the inner wall of the accommodating cavity (9) is provided with pearl cotton (17), and the pearl cotton (17) on two sides are respectively positioned at the tops of the two earphones (2).

5. The active noise reduction earphone for preventing in-box howling as claimed in claim 1, wherein: and a filter screen is arranged on the surface of the outer end of the earplug (4).

6. An active noise reduction earphone for preventing in-box howling as claimed in claim 2, wherein: the number of the telescopic rods (11) is not less than four, and the number of the telescopic rods (11) is equal to that of the springs (13).

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