CN204948303U - A kind of moving coil earphone - Google Patents

Abstract

The utility model discloses a moving-coil earphone, which comprises an earcup. The earcup includes a horn and a casing. The first-level rear cavity and the second-level rear cavity. The shell includes the front plate of the speaker cavity, the rear plate of the speaker cavity and the rear cover of the earcup. The first-level rear cavity is formed between the front plate of the speaker cavity and the rear plate of the speaker cavity. The secondary rear cavity is formed between the rear plate of the speaker cavity body and the rear cover of the earcup, and the horn is arranged in the primary rear cavity. The dynamic earphone of the utility model has a dual rear cavity earphone acoustic system, which can widen the low-frequency working frequency band, reduce harmonic distortion, and make the overall frequency response more flat.

Description

A dynamic earphone

technical field

The utility model relates to an earphone, in particular to a moving-coil earphone with bass enhancement effect.

Background technique

At present, due to size limitation in commonly used dynamic earphones, the lower limit cut-off frequency of the speaker unit is often not very low (for example, below 100 Hz), and the distortion in the low frequency region is usually larger due to the larger amplitude.

The Chinese invention patent application with application number 201410341845.7 discloses a noise-reducing earphone, as shown in FIG. Set in the head 2 of the wearer, so that the front chamber 5 between the head 2 and the earphone 1 is separated from the surrounding space 6. The earphone 1 includes a shell 3, an ear pad 4, a first diaphragm 11 and a second diaphragm Sheet 13. The housing 3 has a housing wall 9 separating the acoustically compliant rear chamber 10 from the front chamber 5 and from the surrounding space 6; the ear pads 4 are arranged and adapted to attenuate when the earphone 1 is in the operating position. The sound signal enters the front chamber 5 from the surrounding space 6; the first diaphragm 11 is reciprocally suspended and adapted to pass through the first through hole in the housing wall 9 between the front chamber 5 and the rear chamber 10. Actively driven to provide at least a portion of the acoustic output signal; and a second diaphragm 13 reciprocally suspended across a second through hole in the housing wall 9 between the rear chamber 10 and the surrounding space 6, thereby Such that the second diaphragm 13 and the rear chamber 10 constitute an acoustic resonance system 10 , 13 that acoustically resonates at the resonance frequency. It can be seen from FIG. 1 that although the earphone has a noise reduction function, the solution has a rear chamber 10, which still has the problem of large amplitude in the low frequency range and poor bass effect.

Utility model content

The purpose of the utility model is to solve the problem that the bass effect of the existing earphone is not good, and provide a dynamic earphone, which realizes the bass enhancement effect through the acoustic system of the earphone with double rear chambers.

In order to achieve the above object, the moving coil earphone of the present invention includes an earcup, the earcup includes a horn and a housing, and the horn is arranged in the housing, wherein it also includes a double rear cavity earphone acoustic system, so The acoustic system of the dual-rear-chamber earphone includes a first-stage rear chamber and a second-stage rear chamber that are connected. Between the front plate of the speaker cavity and the rear plate of the speaker cavity, the secondary rear cavity is formed between the rear plate of the speaker cavity and the rear cover of the earcup, and the horn is arranged on the Describe the first-level posterior cavity.

In the above-mentioned dynamic earphone, wherein, the primary rear chamber and the secondary rear chamber are connected through a bass tube, and the bass tube is connected to the rear plate of the horn cavity.

The above-mentioned dynamic earphone, wherein, the bass tube includes a first end and a second end, the first end is flush with the rear plate of the horn cavity, and the second end extends to the In the secondary posterior cavity.

In the above moving coil earphone, a front damping hole is arranged on the front plate of the speaker cavity, and a front damping member is arranged on the front damping hole.

In the above moving coil earphone, a rear damping hole is arranged on the rear plate of the horn cavity, and a rear damping member is arranged on the rear damping hole.

In the above-mentioned dynamic earphone, wherein, the front damping element and the rear damping element are respectively acoustic mesh.

In the above-mentioned dynamic earphone, wherein, the back cover of the earcup is provided with a sound leakage hole, and the sound leakage hole communicates with the secondary rear cavity and the outside atmosphere.

In the above moving coil earphone, the horn is connected to the front plate of the horn cavity.

In the above-mentioned dynamic earphone, the diameter of the horn is 6mm to 50mm.

The above-mentioned dynamic earphone further includes a circuit board structural part, and the circuit board structural part is arranged in the secondary rear cavity.

The beneficial effects of the utility model are:

The earphone of the utility model has the acoustic system of the earphone with double rear chambers, which can broaden the low-frequency working frequency band, reduce harmonic distortion, and make the overall frequency response more flat.

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

Description of drawings

FIG. 1 is a schematic structural diagram of an acoustic system of an earphone in the prior art;

Fig. 2 is the structural representation of earphone of the present utility model;

Fig. 3 is a structural schematic diagram of the acoustic system of the earphone of the present invention.

Among them, reference signs

1 headphone

2 heads

3 shells

4 ear pads

5 front chambers

6 surrounding space

7 ears

9 enclosure walls

10 rear chamber

11 first diaphragm

13 second diaphragm

The utility model:

10 dynamic earphones

100 ear cups

110 speakers

120 shell

130 speaker cavity front plate

131 front damping hole

140 speaker cavity rear panel

141 rear damping hole

150 ear cup back cover

151 sound leak hole

160 dual rear chamber earphone acoustic system

161 level one rear cavity

162 secondary rear cavity

170 Bass Tube

171 first end

172 second end

180 circuit board structure

20 front cavity

30 ear pads

detailed description

The technical scheme of the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments, so as to further understand the purpose, scheme and effect of the utility model, but not as a limitation of the scope of protection of the appended claims of the utility model.

As shown in Fig. 2 and Fig. 3, the dynamic earphone 10 of the present invention includes an ear cup 100. When in use, the dynamic earphone 10 is worn on the user's head, and the ear cup 100 is set on the user's ear. , so as to send the sound provided by the earphone 10 to the user's ear.

As shown in FIG. 3 , the ear cup 100 of the dynamic earphone 10 includes a horn 110 and a housing 120 , and the horn 110 is disposed in the housing 120 .

The housing 120 includes a speaker cavity front panel 130 , a speaker cavity rear panel 140 and an earcup rear cover 150 . The dynamic earphone 10 of the present utility model adopts a dual rear chamber earphone acoustic system 160, and the dual rear chamber earphone acoustic system 160 includes a first-stage rear chamber 161 and a second-stage rear chamber 162, wherein the first-stage rear chamber 161 is formed in Between the speaker cavity front panel 130 and the speaker cavity rear panel 140 , the secondary rear cavity 162 is formed between the speaker cavity rear panel 140 and the earcup rear cover 150 .

The horn 110 is arranged in the first-stage rear cavity 161 and connected to the front plate 130 of the horn cavity. The front cavity 20 is formed by the user's ear, the ear pad 30 and the speaker cavity front plate 130 .

The primary rear chamber 161 and the secondary rear chamber 162 are connected through a bass tube 170 , and the bass tube 170 is connected to the rear plate 140 of the horn cavity. The bass tube 170 includes a first end 171 and a second end 172 , the first end 171 is flush with the rear plate 140 of the horn cavity, and the second end 172 extends into the secondary rear cavity 162 .

The dynamic earphone 10 of the present invention adopts a dual damping adjustment system at the same time, which are respectively a front damping system and a rear damping system. Between the rear chamber 161 and the second-stage rear chamber 162 is used to adjust the frequency response of the middle and high frequency bands.

Specifically, as shown in FIG. 3 , a front damping hole 131 is disposed on the front plate 130 of the horn cavity, and a front damping member is disposed on the front damping hole 131 . The front damping hole 131 and the front damping member constitute a front damping system.

A rear damping hole 141 is disposed on the rear plate 140 of the horn cavity, and a rear damping member is disposed on the rear damping hole 141 . The rear damping hole 141 and the rear damping member constitute a rear damping system.

Wherein, the front damping part and the rear damping part are sound-tuning mesh cloth respectively. The specifications of the acoustic mesh and the size of the damping hole area should be selected according to the volume of the speaker and the acoustic cavity. The front damping hole 131 is used to adjust the frequency response curve of the intermediate frequency and low frequency below 1000 Hz, and the rear damping hole 141 is used to smooth the resonance of the tube and the rear cavity and adjust the sensitivity below 500 Hz.

The earcup back cover 150 is provided with a sound leakage hole 151, and the sound leakage hole 151 communicates with the secondary rear cavity 162 and the outside atmosphere.

In addition, the dynamic earphone 10 of the present invention also includes a circuit board structure 180 , the circuit board structure 180 is arranged in the secondary rear cavity 162 and can be connected to the rear plate 140 of the horn cavity.

In the present invention, the primary rear cavity 161 is a pure acoustic cavity and is the main acoustic cavity, and the secondary rear cavity 162 is an auxiliary cavity in which the circuit board structure 180 and the like can be placed. In this design, the first-level rear cavity 161 is very easy to make the left and right ears very consistent. Even if the circuit board structural parts 180 placed in the second-level rear cavity 162, such as electronic and mechanical components, are not symmetrical, it will basically not affect the balance of the left and right ears. Spend.

Therefore, the arrangement of the secondary rear cavity 162 in the present invention can ensure the balance between the left and right ears even for complex earphones (such as Bluetooth ANC earphones).

The design method of the acoustic system 160 of the double-back cavity earphone of the present invention is applicable to semi-open and closed dynamic-coil earphones of various sizes. The diameter of the speaker 110 of the dynamic earphone 10 is 6 mm to 50 mm.

The dynamic earphone 10 can be a wired earphone or a wireless earphone.

The acoustic system 160 of the earphone acoustic system 160 described in the utility model adopts the bass tube 170, cooperates with the two-stage rear cavity and the double damping adjustment system, can enhance the bass, reduce the lower limit cut-off frequency to about half of the original, reduce the low-frequency distortion, and pass The dual damping system better adjusts the middle and high frequencies to achieve a flatter frequency response curve and a more natural and balanced sense of hearing.

Of course, the utility model can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the utility model without departing from the spirit and essence of the utility model, but These corresponding changes and deformations should all belong to the protection scope of the appended claims of the present utility model.

Claims (11)

1. A dynamic earphone, comprising an earcup, the earcup comprising a horn and a housing, the horn being arranged in the housing, characterized in that it also includes a double rear cavity earphone acoustic system, the double rear cavity The earphone acoustic system includes a first-stage rear chamber and a second-stage rear chamber that are connected. The housing includes a speaker cavity front plate, a speaker cavity rear plate, and an earcup rear cover. Between the front plate of the speaker cavity and the rear plate of the speaker cavity, the secondary rear cavity is formed between the rear plate of the speaker cavity and the rear cover of the earcup, and the horn is arranged on the primary Rear cavity. 2. The dynamic earphone according to claim 1, characterized in that, the primary rear chamber and the secondary rear chamber are communicated through a bass tube, and the bass tube is connected to the horn cavity back panel. 3. The dynamic earphone according to claim 2, wherein the bass tube comprises a first end and a second end, the first end is flush with the rear plate of the horn cavity, The second end extends into the secondary rear chamber. 4 . The dynamic earphone according to claim 1 , wherein a front damping hole is arranged on the front plate of the horn cavity, and a front damping member is arranged on the front damping hole. 5. The dynamic earphone according to claim 4, wherein the front damping member is an acoustic mesh. 6 . The dynamic earphone according to claim 1 , wherein a rear damping hole is arranged on the rear panel of the speaker cavity, and a rear damping member is arranged on the rear damping hole. 7. The dynamic earphone according to claim 6, wherein the rear damping member is an acoustic mesh. 8. The dynamic earphone according to any one of claims 1 to 7, characterized in that, the earcup back cover is provided with a sound leakage hole, and the sound leakage hole connects the secondary rear cavity with the outside world atmosphere. 9. The dynamic earphone according to any one of claims 1 to 7, wherein the horn is connected to the front plate of the horn cavity. 10. The dynamic earphone according to any one of claims 1 to 7, characterized in that the diameter of the horn is 6 mm to 50 mm. 11. The dynamic earphone according to any one of claims 1 to 7, further comprising a circuit board structure, the circuit board structure being disposed in the secondary rear cavity.