TWI602438B - Earphone - Google Patents

Description

headset

The invention discloses an earphone, in particular to an in-ear earphone with an earplug.

Previous earphone audio signals include high and low audio parts, which generate high and low audio sound waves while vibrating at the same diaphragm. However, due to the high and low audio sound waves, they have different wavelength and amplitude characteristics, such as the same diaphragm alone. Differently distinguishing different characteristics, it is often caused by high and low audio intermodulation distortion and can not get a clear display of sound. In the prior art, some headphones have built-in high and low woofer to play high and low audio signals individually, but this kind of This will increase the size of the headset and increase the cost.

In view of the above drawbacks, it is necessary to improve the prior art to overcome the above drawbacks.

The technical problem to be solved by the present invention is to provide an earphone that can optimize the low frequency sound effect of the earphone.

In order to solve the above technical problem, the technical means of the present invention is: an earphone comprising: a housing having an opening at a front end thereof; a speaker unit electrically connecting the cable and disposed in the housing to isolate the housing into The front and rear sound chambers; the vibration module is disposed on the rear side of the speaker unit and is wrapped in the casing, and has a passive sound chamber which can communicate with the rear sound chamber, and the passive sound chamber is provided with a passive The diaphragm, the horn of the aforementioned horn can drive the passive diaphragm vibration in the passive sound chamber.

Compared with the prior art, the passive diaphragm of the vibration module of the earphone of the present invention is driven by the sound waves emitted by the rear earphone unit, thereby compensating for the low audio in the rear sound chamber, thereby obtaining a clear presentation of the sound.

1‧‧‧shell

2‧‧‧ horn monomer

3‧‧‧Vibration module

4‧‧ Earplugs

5‧‧‧Tune cloth

6‧‧‧Strain release department

11‧‧‧ front cover

12‧‧‧ middle shell

13‧‧‧ Back cover

121,63,313‧‧‧through holes

61‧‧‧Card Department

62‧‧‧Extension

111‧‧‧ first end

112‧‧‧ second end

113‧‧‧First Step

21‧‧‧Metal housing

211‧‧‧ convex

212‧‧‧second step

114‧‧‧Cars Department

1141‧‧‧ card slot

31‧‧‧ protective cover

32‧‧‧ Passive diaphragm

33‧‧‧Steel net

311‧‧‧ Main body

312‧‧‧Outside

321‧‧‧ Load-bearing department

322‧‧‧ hanging edge

323‧‧‧Bronze ring

331‧‧‧Net Department

332‧‧‧Edge

131‧‧‧ third step

10‧‧‧ front sound chamber

20‧‧‧After the sound chamber

30‧‧‧ Passive sound chamber

710,720,810,820, 830,910,920‧‧‧ Curve

The first figure is an assembled view of the earphone of the present invention.

The second figure is a perspective view of another perspective of the first figure.

The third figure is a completely exploded view of the first figure.

The fourth figure is another exploded view of the third figure.

The fifth figure is an exploded enlarged view of the vibration module in the third figure.

The sixth drawing is a cross-sectional view taken along the A-A direction in the first drawing.

The seventh figure is a schematic diagram of the influence of the design of the sound chamber of the present invention on the sound effect of the horn.

The eighth figure is a schematic diagram of superposition of sound waves in the front and rear sound chambers of the horn of the present invention.

The ninth figure is a schematic diagram of the acoustic intensity/frequency curve of the incoming channel in the external environment of the earphone.

Referring to FIG. 1 to FIG. 4 , a preferred embodiment of the earphone 100 of the present invention includes a housing 1 , a horn unit 2 and a vibration module 3 respectively disposed in the housing 1 , and is disposed at the front end of the housing 1 . The earplug 4 placed in the auricle of the user, the tunable cloth 5 disposed at the front end opening of the casing 1, and the stress relief portion 6 assembled in the casing 1 for the passage of a cable (not shown).

Referring to FIG. 3 and FIG. 6 together, the housing 1 includes a front cover 11 at the front end, a middle case 12 fastened to the rear end of the front cover 11, and a rear cover 13 fastened to the rear end of the middle case 12. The front cover 11, the middle case 12 and the rear cover 13 are provided with a stepped portion which is matched with each other so that the front cover 11, the middle case 12 and the rear cover 13 are snap-fitted into one body. A circular through hole 121 is defined in the bottom of the middle case 12. The stress relief portion 6 is provided with a locking portion 61 and a columnar extending portion 62 extending downward from the fastening portion 61. The through hole 63 penetrates the above-described fastening portion 61 and the extending portion 62 from top to bottom. The extending portion 62 of the stress releasing portion 6 protrudes from the through hole 121 of the middle case 12, and the engaging portion 61 is stopped and fastened to the inner wall of the middle case 12. A cable (not shown) extends into the earphone 100 through the through hole 121 and is electrically connected to the speaker unit 2 .

Referring to FIG. 4 and FIG. 6 together, the front cover 11 is substantially cylindrical, and includes a first end 111 of a smaller circular opening and a second end 112 of a larger circular opening. The inside of the front cover 11 is formed. The first step portion 113. A circular convex portion 211 is formed at a distal end of the metal casing 21 of the horn unit 2, and the convex portion 211 and the outer edge of the metal casing 21 form a second step portion 212 corresponding to the first step portion 113. The first step portion 113 is fixedly coupled to the second step portion 212 to fix the horn unit 2 to the front cover 11 at a central axis of the vertical housing 1 . The smaller opening edge of the first end 111 of the front cover 11 first extends from the radial direction and the forward direction to form an annular holding portion 114. The locking portion 114 defines a stepped holding groove 1141 to fix the aforementioned tuning cloth 5. The outer diameter of the latching portion 114 is larger than the outer diameter of the first end 111, and the earplug 4 can be sleeved and locked on the outer peripheral surface of the latching portion 114.

Referring to FIG. 3 to FIG. 6 together, the vibration module 3 includes a protective cover 31, a passive diaphragm 32, and a steel mesh 33. The vibration module 3 is disposed at the rear of the casing 1. The protective cover 31 includes a circular main body portion 311 and an outer edge portion 312 which is bent outward from the edge of the main body portion 311 and extends outward. A plurality of through holes 313 are defined in a central portion of the main body portion 311. The passive diaphragm 32 includes a load portion 321 located at a central portion, and a semi-arc-shaped annular suspension 322 having a semi-arc cross section formed radially from an edge of the load portion 321 and a radial extension of the outer edge of the suspension 322 Annular copper ring 323. The weight portion 321 is used to support the entire vibration module 3, and the material of the weight portion 321 can be selected from aluminum foil or a composite material of foamed material and metal, thereby increasing the rigidity of the entire vibration module 3 without being overweight. This causes the passive diaphragm 32 to fail to vibrate. In the present embodiment, the weight of the weight portion 321 can be adjusted to change the resonance frequency of the vibration module 3, and the vibration phase of the entire vibration module 3 can also be adjusted. The material used for the suspension 322 is a high-life soft material such as a polymer material such as PU, PET or PEEK. In the present embodiment, the resonance frequency and the vibration phase of the vibration module 3 can be adjusted by adjusting the material thickness and hardness of the suspension 322. The suspension 322 of the passive diaphragm 32 is made of a polymer material such as PU, PET or PEEK, and has a relatively large surface area, a relatively small thickness, and good sound permeability. The stencil 33 includes a mesh portion 331 provided with a plurality of meshes, and the outer edge of the mesh portion 331 is bent toward one side and extends outward to form an edge portion 332. The passive diaphragm 32 is placed between the protective cover 31 and the stencil 33, and the copper ring 323 of the passive diaphragm 32, the outer edge portion 312 of the protective cover 31, and the edge portion 332 of the stencil 33 are placed along the edge. The front and rear directions are stacked to form the aforementioned vibration module 3.

Referring to FIG. 3, FIG. 4 and FIG. 6, the rear cover 13 is formed in a barrel shape, and the rear end of the rear cover 13 is extended in the center direction to form a third step portion 131 inside the rear cover 13, the vibration. The module 3 is placed in the rear cover 13 and the edge portion 332 of the steel mesh 33 abuts against the third step portion 131 The central portion of the vertical casing 1 is locked, and the mesh portion 331 of the stencil 33 is exposed to the rear end of the rear cover 13.

As shown in FIG. 6, the horn unit 2 of the assembled earphone 100 divides the space in the casing 1 into the front sound chamber 10 and the rear sound chamber 20, and the passive sound chamber 30 is formed in the vibration module 3. The aforementioned rear sound chamber 20 is completely isolated from the aforementioned front sound chamber 10.

As shown in FIG. 7, a curve 710 shows a plot of intensity/frequency of sound waves emitted by the horn unit 2. Curve 720 shows the sound wave intensity/frequency curve after the influence of the sound cavity. The front sound chamber 10 is in direct contact with the acoustic system "ear canal", and most of the sound emitted by the horn unit 2 is directly transmitted to the ear canal of the user through the front sound chamber 10, and the rear sound chamber 20 is isolated from the front sound chamber 10 , the front and rear sound waves of the horn unit 2 can not appear acoustic short circuit phenomenon, and can compensate the low frequency part of the sound wave, extend the high frequency part of the sound wave, and improve the low frequency performance of the sound wave.

As shown in FIG. 8, curve 810 shows the phase plot of the acoustic wave in the rear chamber 20, and curve 820 shows the phase plot of the acoustic wave in the front chamber 10. Curve 830 shows the phase curve of the sound wave after superposition. As can be seen from the figure, when the sound waves in the current sound chamber 10 and the rear sound chamber 20 are positively superimposed, the sound waves are amplified after superimposing; otherwise, when the two sound waves are combined When a negative superposition is produced, the sound waves are reduced after the superposition of the two. The passive sound chamber 30 is located in the rear sound chamber 20, and the rear sound wave passing through the rear sound chamber 20 drives the passive diaphragm 32 in the vibration module 3 to vibrate. The vibration of the passive diaphragm 32 and the sound wave superimposed by the speaker unit 2 can be changed. The low frequency sound wave phase and sound pressure in the rear sound chamber 20, thereby achieving the effect of enhancing the low frequency of the sound wave in the rear sound chamber 20, and causing the sound waves in the front sound chamber 10 and the rear sound chamber 20 to be positively superimposed.

As shown in FIG. 9, curve 910 shows a plot of the intensity/frequency of the acoustic wave entering the channel in the external environment when the closed back cavity 20 is employed. Curve 920 shows the acoustic intensity/frequency curve of the incoming channel in the external environment when the stencil 33 and the vibrating vibration module 3 are used to cause the rear chamber 20 to be semi-closed. Comparing the curve 910 and the curve 920, since the passive diaphragm 32 is made of a high-vibration polymer material, the sound wave in the external environment can be allowed to enter the rear chamber 20 through the vibration module 3, so that the headphone 100 does not completely block the outside. The ambient sound has a more sense of space in the sense of hearing.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the foregoing is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention should be It is covered by the following patent application.

2‧‧‧ horn monomer

4‧‧ Earplugs

5‧‧‧Tune cloth

11‧‧‧ front cover

12‧‧‧ middle shell

13‧‧‧ Back cover

10‧‧‧ front sound chamber

20‧‧‧After the sound chamber

30‧‧‧ Passive sound chamber

31‧‧‧ protective cover

32‧‧‧ Passive diaphragm

33‧‧‧Steel net

211‧‧‧ convex

312‧‧‧Outside

332‧‧‧Edge

323‧‧‧Bronze ring

61‧‧‧Card Department

62‧‧‧Extension

63‧‧‧through hole

Claims (9)

An earphone comprises: a housing having an opening at a front end thereof; a speaker unit electrically connected to the cable and disposed in the housing to isolate the housing into front and rear sound chambers; and a vibration module The back side of the speaker unit is wrapped in the casing, and has a passive sound chamber that can communicate with the rear sound chamber. The passive sound chamber is provided with a passive diaphragm, and the speaker can emit a passive sound. The passive diaphragm vibration in the cavity, wherein the rear end of the casing is provided with an opening, and the passive sound cavity communicates with the external environment on the rear side of the casing through the opening. The earphone according to claim 1, wherein the passive diaphragm comprises a load-bearing portion, a suspension extending radially from an edge of the load-bearing portion, and a copper ring radially extending from an outer edge of the self-sustaining edge. The earphone according to claim 1, wherein the suspension film of the passive diaphragm is made of a soft material. The earphone according to claim 2, wherein the material of the weight portion of the passive diaphragm is an aluminum foil or a composite material of a foamed material and a metal. The earphone according to the first aspect of the invention, wherein the vibration module of the earphone further comprises a protective cover disposed on a front side of the passive diaphragm, wherein the protective cover defines a plurality of through holes extending through the front and rear directions, and the passive sound cavity borrows the through hole It is in communication with the aforementioned rear sound chamber. The earphone according to the first aspect of the invention, wherein the vibration module further comprises a steel mesh disposed on a rear side of the passive diaphragm, wherein a mesh portion is disposed in a middle portion of the steel mesh, and the mesh portion of the steel mesh borrows from the opening Exposed to the outside of the casing, the aforementioned passive sound chamber communicates with the external environment by the aforementioned mesh portion. The earphone of claim 6, wherein the outer edge of the mesh portion of the stencil extends outward to form an outer edge portion for fixing the steel mesh to the rear side of the casing. The earphone according to claim 7, wherein the copper ring of the passive diaphragm is stacked and fixed to a front side of the outer edge portion of the steel mesh to fix the passive diaphragm to the steel mesh. The earphone of claim 1, wherein the housing comprises a front cover at the front end, a middle case fastened to the rear end of the front case, and a rear cover fastened to the rear end of the middle case.