KR20090011590U - Dual-Frequency Coaxial Earphone - Google Patents

Abstract

The dual frequency coaxial earphone according to the present invention includes a frame, a common yoke, a high frequency speaker unit, and a low frequency speaker unit. The high frequency speaker portion and the low frequency speaker portion are coaxially arranged inside and outside the common yoke and coaxial with the central opening of the frame. Further, the permanent magnet of the high frequency speaker portion is opposite in polarity to the ring magnet of the low frequency speaker portion. Thus, the sound frequency of the low frequency speaker portion can be phase-inverted by passing through an annular recess, so that the sound frequency of the low frequency speaker portion can have the same phase as the sound frequency of the high frequency speaker portion, so that both Output in phase. Then, the high frequency speaker unit and the low frequency speaker unit can be separated in terms of sound frequency. This will effectively solve the intermodulation problem of distortion for high and low sound frequencies, and make it possible to reduce the size of earphones even more compactly.

Diaphragm, Intermodulation, Dual Frequency, Coaxial Earphones, Voice Coil, Permanent Magnet, Common Yoke, Pole Piece, Fixing Ring, Crown, Center Opening

Description

Dual-Frequency Coaxial Earphones

1 is a cross-sectional view showing a conventional earphone.

2 is an exploded view showing the earphone according to the first embodiment of the present invention.

3 is a cross-sectional view showing the earphone according to the first embodiment of the present invention.

4 is a perspective view showing the earphone according to the first embodiment of the present invention.

5 is a cross-sectional view showing an earphone according to a second embodiment of the present invention.

6 is a perspective view showing an earphone according to a third embodiment of the present invention.

7 is a cross-sectional view showing an earphone according to a third embodiment of the present invention.

Brief description of the main symbols in the drawing

1: frame 2: public yoke

3: high frequency speaker portion 4: low frequency speaker portion

5: circuit board 6: case

11: front board 12: side wall

13: reception space 21: crown portion

22: band portion 31: permanent magnet

32: pole piece 33: high frequency voice coil

34: high frequency diaphragm 41: ring magnet

42: annular pole piece 43: low frequency voice coil

44: low frequency diaphragm 45: fixing ring

46: acoustic ring recess 51: frequency divider

61: code 71: earplugs

110: inside of the front board 111: center opening

112: sound hole 120: the inside of the side wall

211: concave surface 212: convex surface

Field of devise

The present invention relates to an earphone structure, and more particularly, to a structure for a dual frequency coaxial earphone.

Background of the devise

In Fig. 1, a cross sectional view illustrating a conventional earphone is shown, wherein the earphone 9 includes a case 90, a cord 91, a diaphragm 92, a permanent magnet 93, Voice coil 94, pole piece 95, and yoke 96.

As shown in Fig. 1, the cord 91, the diaphragm 92, the permanent magnet 93, the voice coil 94, the pole piece 95, and the yoke 96 are each received in a case. The voice cord 94 is disposed radially over the diaphragm 92 and around the permanent magnet while keeping a gap with the pole piece 95. The permanent magnet 93 is inserted between the pole piece 95 and the yoke 96.

The cord 91 is electrically connected to the voice coil 94 so that an acoustic frequency signal is transmitted through the cord 91 to the voice coil 94, and the voice coil 94 is due to a magnetic effect. Forms a magnetic field. The magnetic field is then magnetically interconnected with the pole piece 95, causing the diaphragm 92 to vibrate so that the sound frequency signal can be converted into an acoustic frequency wave and output.

In general, sound frequency signals are associated with high frequency speaker units and low frequency speaker units. Thus, the vibration of the diaphragm produces high sound frequency waves and low sound frequency waves at the same time. However, since the high and low sound frequency waves are associated with different wavelength and amplitude characteristics, the diaphragms cannot clearly distinguish each other's characteristics. As such, conventional earphones have the disadvantage of intermodulation of distortion for high and low sound frequencies, and cannot produce clear sound. To overcome this disadvantage, if the high frequency speaker and the low frequency speaker are arranged together in the earphone, the large size will make the earphone useless.

An object of the present invention is to provide a dual frequency coaxial earphone including a frame, a common yoke, a high frequency speaker unit, and a low frequency speaker unit.

Another object of the present invention is to provide a dual frequency coaxial earphone for solving the intermodulation problem of distortion for high and low sound frequencies.

Another object of the present invention is to provide a coaxial earphone that can reduce the size of the earphone more compact.

The above and other objects of the present invention can be achieved by the present invention described in detail. Hereinafter, the contents of the present invention will be described in detail.

Summary of the devise

The present invention provides a dual frequency coaxial earphone including a frame, a shared yoke, a high frequency speaker unit, and a low frequency speaker unit.

The frame includes a front board and a peripheral wall, the side walls surrounding the front board, wherein the interior of the side wall and the interior of the front board surround each other and together form a receiving space. The front boards each have a central opening and a plurality of sound holes in communication with the receiving space. Many sound holes are equidistantly aligned at least over part of the front board and around the central opening.

The common yoke has a hat shape, is disposed in the receiving space of the frame, and includes a crown portion and a band portion. The band portion is located around the crown portion and is fixed inside the front board. The crown portion is coaxially aligned with the central opening of the front board away from the front board. The crown portion comprises a concave.

The high frequency speaker section includes a permanent magnet, a pole piece, a high frequency voice coil, and a high frequency diaphragm, the permanent magnet being received in the crown portion of the common yoke and inserted between the pole piece and the concave surface. And the high frequency voice coil is disposed on the high frequency diaphragm and surrounds the pole piece, while radially maintaining a gap with the pole piece. The high frequency diaphragm is received in the central opening of the front board.

The low frequency speaker unit includes a ring magnet, a ring pole piece, a low frequency voice coil, and a low frequency diaphragm. The annular magnet surrounds the crown portion of the common yoke and is inserted between the annular pole piece and the band portion of the common yoke. The annular magnet and the permanent magnet of the high frequency speaker section have different polarities opposite to each other. The low frequency voice coil is disposed on the low frequency diaphragm while keeping a radial gap from the annular pole piece and is housed in the annular pole piece. The low frequency diaphragm is disposed inside the sidewall of the frame.

 The common yoke and the low frequency speaker portions are each smaller on the outside than inside the side walls of the frame and are spaced from each other by an acoustic annular recess through the plurality of sound holes in the frame. ).

In the present invention, the high frequency speaker portion and the low frequency speaker portion are coaxially aligned in and out of the common yoke and coaxial with the central opening of the frame. Further, the permanent magnet of the high frequency speaker portion is opposite in polarity to the ring-shaped magnet of the low frequency speaker portion. Thus, the sound frequency of the low frequency speaker portion can be phase-countered as it passes through the acoustic ring recess, so that the sound frequency of the low frequency speaker portion can have the same phase as the sound frequency of the high frequency speaker portion. The two are then output in phase. Then, the high frequency speaker unit and the low frequency speaker unit can be separated from each other in terms of sound frequency. This will effectively solve the intermodulation problem of distortion for high and low sound frequencies, and make it possible to reduce the size of earphones even more compactly.

Furthermore, the dual frequency coaxial earphone consists of one case and one cord. The case may include an earplug or a headset. In addition, the dual frequency coaxial earphone may further include a circuit board or a frequency divider.

Also in the present invention, the high frequency diaphragm may further include an inner ring and an outer ring, the high frequency voice coil is disposed in the inner ring, and the outer ring is disposed in the front board and around the central opening. The low frequency diaphragm may comprise an inner ring and an outer ring, wherein the low frequency voice coil is disposed within the inner ring and the outer ring is disposed inside the sidewall. The dual frequency coaxial earphone may further include a fixing ring disposed inside the sidewall to fix the low frequency diaphragm.

Other objects, advantages, and novel features of the present invention will become apparent from the following detailed description and the accompanying drawings.

Detailed Description of the Inventive Embodiment

2 and 3 are exploded views and cross-sectional views illustrating an earphone according to a first embodiment of the present invention, wherein the dual frequency coaxial earphone is a frame (1), a common yoke (2), a high frequency speaker unit (3), and a low frequency speaker Part 4 is included.

The frame 1 comprises a front board 11 and a side wall 12, the side wall 12 surrounds the front board 11, the interior 120 of the side wall and the interior of the front board 11. The 110 are surrounded by each other to form a receiving space 13 together. The front board 11 is formed with a central opening 111 and a plurality of sound holes 112, each of which is in communication with the receiving space 13. The plurality of sound holes 112 are equidistantly aligned at least over a portion of the front board 11 and around the central opening.

The common yoke 2 has a hat shape and is disposed in the receiving space 13 of the frame 1, and includes a crown portion 21 and a band portion 22. The band portion 22 is provided around the crown portion 21 and is fixed to the interior 110 of the front board 11. The crown 21 is coaxially aligned with the central opening 111 of the front board, away from the front board 11. The crown portion 21 includes a concave surface 211 and a convex surface 212.

The high frequency speaker section 3 includes a permanent magnet 31, a pole piece 32, a high frequency voice coil 33, and a high frequency diaphragm 34, the permanent magnet 31 is the common yoke 2 And is inserted between the pole piece 32 and the concave surface 211 of the common yoke 2, and the high frequency voice coil 33 radially forms a gap with the pole piece 32. While maintaining the high frequency diaphragm 34, it is disposed on and surrounds the pole piece 32, which further enhances the magnetism of the permanent magnet 31 over or between the high frequency voice coil 33 and the pole piece 32. Hardened and focused. The high frequency diaphragm 34 is received in the central opening 111 of the front board 11.

In an embodiment of the present invention, the high frequency diaphragm 34 includes an inner ring 341 and an outer ring 342, wherein the high frequency voice coil 33 is disposed within the inner ring 341, and an outer ring ( 342 is disposed in the front board 11 and around the central opening 111.

The low frequency speaker unit 4 includes an annular magnet 41, an annular pole piece 42, a low frequency voice coil 43, and a low frequency diaphragm 44. The annular magnet 41 surrounds the crown portion 21 of the common yoke 2 and is inserted between the annular pole piece 42 and the band portion 22 of the common yoke 2. The annular magnet 41 and the permanent magnet 31 of the high frequency speaker section 3 have different polarities opposite to each other. The low frequency voice coil 43 is disposed above the low frequency diaphragm 44, while radially maintaining a gap from the annular pole piece 42, received in the annular pole piece 42, and the annular pole. It is located between the piece 42 and the crown 21 of the common yoke 2, which allows the ring magnet 42 to be placed on and between the low frequency voice coil 43 and the annular pole piece 42. Will strengthen and focus your magnetism. The low frequency diaphragm 44 is disposed in the interior 120 of the side wall 12 of the frame 1.

In an embodiment of the present invention, the low frequency diaphragm 44 may further include an inner ring 441 and an outer ring 442, wherein the low frequency voice coil 43 is disposed within the inner ring 441, The outer ring 442 is disposed within the interior 120 of the side wall 12.

The common yoke 2 and the low frequency speaker portion 4 are smaller on the outside than the interior 120 of the side wall 12 of the frame, respectively, and communicate with the plurality of sound holes 112 of the frame 1. They are spaced apart from each other by annular recesses 46.

 According to the present invention, as shown in FIG. 2, the dual frequency coaxial earphone may further include a circuit board 5 disposed on the frame 1. The dual frequency coaxial earphone may also include a frequency divider 51, which is provided for dividing the mixed sound input signal into a high frequency output signal and a low frequency output signal, each of which is a low frequency voice coil 33 and a low frequency, respectively. It is used by the voice coil 43. Preferably, the frequency divider 51 is integratedly placed on the circuit board 5 to achieve a compact and lightweight purpose.

As shown in Figures 2 and 3, the dual frequency coaxial earphone according to the present invention includes a fixing ring 45 disposed in the interior 120 of the side wall 12 to fix the low frequency diaphragm 44.

With reference to the listener's ear 82 for reference, as shown in FIG. 3, the plurality of permanent magnets 31 of the high frequency speaker section 3 are SN, while vice versa, the low frequency speaker section 4 Many of the annular magnets 41) are NS. However, the sound frequency of the low frequency speaker portion 4 can be phase-countered by passing through the acoustic ring recess 46, so that the sound frequency of the low frequency speaker portion 4 is a high frequency speaker portion. It is possible to have the same phase as the sound frequency of (3), and then the two are output in phase.

In the embodiment of the present invention, the high frequency speaker portion 3 and the low frequency speaker portion 4 are coaxially on the common yoke 2 and on the concave surface 211 and the convex surface 212 of the crown portion 21. It is arranged and coaxial with the central opening 111 of the frame 1. Further, the permanent magnet 31 of the high frequency speaker section 3 is opposite to the ring-shaped magnet 41 of the low frequency speaker section 4 in terms of polarity. Thus, the sound frequency of the low frequency speaker portion 4 can be phase-inverted by passing through the acoustic ring recess 46, so that the sound frequency of the low frequency speaker portion 4 is in phase with the sound frequency of the high frequency speaker portion. And then the two are output in phase. Then, the high frequency speaker unit 3 and the low frequency speaker unit 4 can be separated from each other in terms of sound frequency. This will effectively solve the problem of intermodulation of distortion for high and low sound frequencies, and will make the earphones smaller and more compact.

Referring to FIG. 4, which is a perspective view illustrating an earphone according to a first embodiment of the present invention, the dual frequency coaxial earphone further includes one case 6 and one cord 61. The case 6 accommodates the frame 1, and the cord 61 is electrically connected to the frequency divider 51 to provide a sound input signal mixed in the frequency divider 51.

In addition, Fig. 5 is a cross-sectional view illustrating the earphone according to the second embodiment of the present invention, which is similar in structure to the first embodiment, except that the case comes in the earplug-type case 7. The only difference is that the earplug 71 is included.

6 and 7 are a perspective view and a cross-sectional view illustrating an earphone according to a third embodiment of the present invention. The third embodiment is also similar to the first in structure, except that the case is a headset-type case 8. The only difference is that the headset 81 is included because it is inside.

While the present invention has been described in connection with preferred embodiments, those skilled in the art will recognize that many other variations and modifications are possible within the scope of the present invention.

The present invention is a dual frequency coaxial earphone which coaxially arranges the high frequency speaker unit and the low frequency speaker unit, and the sound frequency is phase-inverted through the acoustic ring recess so that the sound frequency of the low frequency speaker unit is in phase with the sound frequency of the high frequency speaker unit. It is effective to solve the problem of intermodulation of distortion for high and low sound frequencies by outputting the signal.

Simple modifications or changes of the present invention can be easily carried out by those skilled in the art, and all such modifications or changes can be seen to be included in the scope of the present invention.

Claims (9)

A front board and a side wall surrounding the front board, wherein the interior of the side wall and the interior of the front board surround each other and together form a receiving space, the front board each having a plurality of central openings and a plurality of central openings communicating with the receiving space. A frame having a sound hole, wherein the plurality of sound holes are equidistantly aligned around at least a portion of the front board and the central opening; A hat arranged coaxially in the central opening of the front board, the crown being apart from the front board and including a concave surface and a band portion located around the crown and fixed inside the front board, the hat being disposed within the receiving space of the frame Public yoke in shape; A pole piece, a permanent magnet housed in the crown of the common yoke and inserted between the pole piece and the concave surface, a high frequency diaphragm disposed on the front board of the frame, and a high frequency diaphragm while radially maintaining a gap with the pole piece. A high frequency speaker portion disposed above and including a high frequency voice coil surrounding the pole piece; And Annular pole piece, a ring surrounding the crown portion of the common yoke and inserted between the annular pole piece and the band portion of the common yoke and having a different polarity opposite to the permanent magnet of the high frequency speaker part A shaped magnet, a low frequency diaphragm disposed on the sidewall of the frame, and a low frequency voice coil disposed over the low frequency diaphragm and received within the annular pole piece while radially maintaining a gap from the annular pole piece. Low frequency speaker; Wherein the common yoke and the low frequency speaker portion are each smaller than the sidewalls of the frame and are spaced apart from each other by acoustic ring recesses communicating with the plurality of sound holes in the frame.  The dual frequency coaxial earphone of claim 1, further comprising a case and a cord. The dual frequency coaxial earphone of claim 2, wherein the case comprises an earplug. The dual frequency coaxial earphone of claim 2 wherein the case comprises a headset. 2. The dual frequency coaxial earphone of claim 1, further comprising a circuit board. The dual frequency coaxial earphone of claim 1, further comprising a frequency divider. The dual frequency coaxial earphone according to claim 1, wherein the high frequency diaphragm comprises an inner ring and an outer ring, the high frequency voice coil is disposed in the inner ring, and the outer ring is disposed on the front board of the frame. . 2. The dual frequency coaxial earphone of claim 1, wherein the low frequency diaphragm comprises an inner ring and an outer ring, the low frequency voice coil is disposed within the inner ring, and the outer ring is disposed on a side wall of the frame. . The dual frequency coaxial earphone according to claim 1, further comprising a fixing ring disposed inside the sidewall of the frame.

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