CN201252635Y - Double-frequency coaxial earphone with shared magnet - Google Patents

Abstract

The utility model relates to a double-frequency coaxial earphone with sharing magnetite is located the cap roof of outer yoke, with the periphery dish of interior yoke with sharing annular magnetite clamp, so outer yoke just has different magnetism with interior yoke. The low-frequency voice coil axially extends into the space between the inner wall of the ring of the outer yoke and the outer disc of the inner yoke to form a low-frequency voice part; in addition, the inner shaft tube of the inner yoke projects into the central hole of the outer yoke, and the high-frequency voice coil axially extends into the space between the central hole of the outer yoke and the inner shaft tube of the inner yoke to form a high-frequency part. The inner shaft tube is provided with a central through hole as a sound guide tube, so that the audio frequency of the high-audio frequency part can pass through the inner shaft tube to enable the low-frequency vibrating diaphragm of the low-audio frequency part to be enabled synchronously, and form the same phase and synchronous audio frequency output with the low-audio frequency part, thereby effectively solving the distortion problem and having the miniaturization.

Description

Dual-band coaxial headphones with shared magnet

technical field

The utility model relates to an earphone, in particular to a dual-frequency coaxial earphone suitable for sharing magnets.

Background technique

Fig. 1 is a sectional view of a known earphone, as shown in the figure, the known earphone 9 includes an earphone housing 90, a signal line 91, a diaphragm 92, a permanent magnet 93, a voice coil 94, a magnetically conductive part 95, And a yoke 96.

As shown in Figure 1, the signal line 91, the diaphragm 92, the permanent magnet 93, the voice coil 94, the magnetic guide 95, and the yoke 96 are respectively accommodated inside the earphone housing 90, wherein the voice coil 94 is set in the vibration The film 92 surrounds the periphery of the permanent magnet 93 correspondingly, but maintains a radial gap with the magnetic permeable part 95 , and the permanent magnet 93 is interposed between the magnetic permeable part 95 and the yoke 96 .

Wherein, the signal line 91 is electrically connected with the voice coil 94. When the audio signal is input to the voice coil 94 through the signal line 91, the voice coil 94 will generate a magnetic field by the electromagnetic effect, and the magnetic field will interact with the magnetically conductive member 95. function, so that the diaphragm 92 vibrates, and then converts the audio signal into audio sound wave output.

In the known technology, general audio signals include high and low frequency parts, so they vibrate on the same diaphragm 92 to generate high and low frequency sound waves at the same time, but because the high and low frequency sound waves have different wavelengths and amplitudes , if only the same diaphragm 92 cannot clearly separate different characteristics, it is known that the shortcoming of high and low frequency intermodulation distortion often occurs, so that the sound cannot be clearly displayed. And if it is necessary to insert high and low speakers to play high and low audio signals respectively, the volume of the known earphones will become larger, and it is not suitable for the size of the currently known earphones, which often troubles the industry.

Utility model content

The purpose of this utility model is to provide a dual-frequency coaxial earphone with a shared magnet, which can form the audio of the high-frequency part and the low-frequency part in phase and synchronize the audio output, effectively solve the problem of distortion, and also have a small size .

In order to achieve the above purpose, the utility model provides a dual-frequency coaxial earphone with a shared magnet, including an earphone shell, an outer yoke, a shared ring magnet, an inner yoke, a low-frequency part, and a high-frequency department.

Wherein, an accommodating space is provided in the earphone housing. The outer yoke is in the shape of a hat, and the outer yoke is assembled in the accommodation space of the earphone housing. The outer yoke includes a crown and a brim, and the brim is arranged around the outer periphery of the crown. , the crown part includes a cap top plate and a ring inner wall, and the cap top plate is provided with a central hole.

The shared ring magnet of the utility model is set on the inner surface of the cap top plate of the outer yoke, so the outer yoke and the outer contact surface of the shared ring magnet have the same magnetic properties, and the shared ring magnet includes a central hole system and the central hole of the outer yoke Corresponds to the coaxial.

The inner yoke is in a flange shape. The inner yoke includes an inner shaft tube and an outer peripheral disc. The outer peripheral disc ring is set on the outer peripheral edge of the inner shaft tube. The ring magnet is located on the opposite side of the outer yoke, so the inner yoke has the same magnetic properties as the inner contact surface of the shared ring magnet. The outer diameter of the outer peripheral disc is smaller than the inner diameter of the ring inner wall of the outer yoke, and the inner shaft tube is smaller than that of the outer yoke. The central hole, the inner shaft tube protrudes into the central hole of the shared ring magnet and the central hole of the outer yoke, and a central perforation is pierced in the center of the inner shaft tube as a sound guide tube.

The low-frequency part includes a low-frequency voice coil and a low-frequency diaphragm, wherein the low-frequency diaphragm includes a central diaphragm, and the low-frequency voice coil is set on the low-frequency diaphragm and extends into the inner wall of the ring of the outer yoke corresponding to the axial direction. Between the outer peripheral discs of the inner yoke, a radial gap is maintained between the low-frequency voice coil, the inner wall of the ring, and the outer peripheral disc, and the outer circumference of the low-frequency diaphragm is set on the cap edge of the outer yoke.

The high-frequency part includes a high-frequency voice coil and a high-frequency diaphragm. The high-frequency voice coil is set on the high-frequency diaphragm and extends axially between the central hole of the outer yoke and the inner shaft tube of the inner yoke. The voice coil maintains another radial gap with the central hole and the inner shaft tube, and the outer circumference of the high-frequency diaphragm is set on the crown of the outer yoke.

Wherein, the inner shaft tube of the bass part is connected between the central diaphragm of the treble part and the bass part.

Therefore, the audio of the high-frequency part can pass through the inner shaft tube to enable the central diaphragm of the low-frequency part, and form the same phase with the audio of the low-frequency part and output synchronously, so the different audio frequencies of the high-frequency part and the low-frequency part can be combined. Separation can effectively solve the problem of high and low audio intermodulation distortion, and can also minimize the size of the earphone.

The bass frequency part may include a sound guide cone, which is fixed on the outer peripheral plate of the inner yoke, and a sound guide hole is opened in the center of the sound guide cone, and the sound guide hole is coaxially corresponding to the central perforation of the inner shaft tube and communicated with each other , so as to evenly distribute the audio frequency of the treble part on the surface of the central diaphragm of the bass part.

In addition, the dual-frequency coaxial earphone with a shared magnet of the present invention may include a circuit board, and the circuit board includes a frequency division circuit, the frequency division circuit is used to separate the mixing input signal into a high-frequency output signal and a low-frequency output signal, To provide high-frequency voice coil and low-frequency voice coil respectively.

The outer yoke can include a plurality of air holes, and the plurality of air holes are opened on the periphery of the brim of the cap, so that the outside air enters the closed space formed by the outer yoke, the low-frequency part, and the high-frequency part, so that the air in the space , External pressure balance.

The low-frequency diaphragm may include an inner concave ring and an outer concave ring. The low-frequency voice coil is arranged on the inner concave ring, and the outer concave ring is arranged on the cap edge of the outer yoke.

Furthermore, the high-frequency diaphragm may include an inner concave ring and an outer concave ring, the high-frequency voice coil is set on the inner concave ring, and the outer concave ring is set on the crown of the outer yoke.

The low-frequency part may include a fixing ring, and the high-frequency part may include another fixing ring, and the fixing ring is assembled on the brim of the outer yoke to fix the low-frequency diaphragm. Another fixing ring is set on the crown of the outer yoke for fixing the high-frequency diaphragm.

The earphone housing of the dual-frequency coaxial earphone of the utility model may also include an earplug, or add an earmuff, or cooperate with various earphones of different sizes and forms. The earphone housing of the present utility model can be formed by a base body and a front cover which are relatively covered and fixed, or can be made by one-piece molding instead.

Through the above structure, the utility model can pass the audio of the high-frequency part through the inner shaft tube to enable the low-frequency diaphragm of the low-frequency part synchronously, and form an in-phase and synchronous audio output with the low-frequency part, effectively solving the distortion problem. It also has the advantages of miniaturization.

Description of drawings

Fig. 1 is a sectional view of a known earphone.

Fig. 2 is a perspective view of the first preferred embodiment of the utility model.

Fig. 3 is an exploded view of the first preferred embodiment of the utility model.

Fig. 4 is a cross-sectional view of the first preferred embodiment of the utility model.

Fig. 5 is a sectional view of the second preferred embodiment of the present invention.

Fig. 6 is a perspective view of a third preferred embodiment of the present invention.

Fig. 7 is a cross-sectional view of a third preferred embodiment of the present invention.

Explanation of main component symbols in the drawings

Outer Yoke 1 Hat Crown 11 Hat Top Plate 110

Central hole 111 Ring inner wall 112 Cap brim part 12

Air hole 113 Bass audio part 2 Shared ring magnet 21

Center hole 210 External contact surface 211 Internal contact surface 212

Inner yoke 22 Central perforation 220

Inner shaft tube 221 Outer peripheral disc 222 Low frequency voice coil 23

Low-frequency diaphragm 24 Central diaphragm 241 Inner concave ring 243

Outer concave ring 244 Sound guide cone 25 Sound guide hole 251

Fixed ring 26, 33 High frequency voice part 3 High frequency voice coil 31

High-frequency diaphragm 32 inner concave ring 321 outer concave ring 322

Circuit board 4 Frequency division circuit 41 Headphone shell 5, 7, 8

Accommodating space 50 seat body 51 front cover 52

Signal line 6 earplugs 71 earmuffs 81

Earphone shell 90 Signal line 91 Diaphragm 92

Permanent magnet 93 Voice coil 94 Magnetic guide 95

Yoke 96

Detailed ways

Please refer to Figure 2 and Figure 3, Figure 2 is a perspective view of the first preferred embodiment of the utility model, Figure 3 is an exploded view of the first preferred embodiment of the utility model. As shown in the figure, this embodiment is a dual-frequency coaxial earphone with a shared magnet, including an earphone housing 5, an outer yoke 1, a bass frequency part 2, a shared ring magnet 21, and an inner yoke 22 , a treble audio part 3 , and a circuit board 4 .

As shown in FIG. 2 , the earphone housing 5 includes a seat body 51 and a front cover 52 , and an accommodating space 50 is defined in the seat body 51 . As shown in Figure 3, the circuit board 4 includes a frequency division circuit 41, wherein the frequency division circuit 41 is used to separate the mixing input signal into a high frequency output signal and a low frequency output signal, so as to provide the high frequency voice coil 31 and the low frequency output signal respectively. 23 low frequency voice coils are used.

As shown in Fig. 2 and Fig. 3, the outer yoke 1, the bass audio part 2, and the treble audio part 3 are jointly accommodated in the earphone housing 5, and the signal line 6 is electrically connected to the frequency dividing circuit 41 to provide a frequency dividing circuit. The audio circuit 41 mixes the input signal.

Please refer to Fig. 2, Fig. 3, and Fig. 4 at the same time. Fig. 4 is a sectional view of the first preferred embodiment of the present utility model. In the accommodating space 50 of the housing 5, the outer yoke 1 includes a crown portion 11 and a brim portion 12, the brim portion 12 is arranged around the outer peripheral edge of the crown portion 11, and the outer yoke 1 passes through the cap The outer periphery of the edge portion 12 is assembled inside the earphone housing 5 . The crown portion 11 includes a top plate 110 and an inner wall 112 . The top plate 110 defines a central hole 111 .

In addition, the outer yoke 1 also includes a plurality of air holes 113, which are opened on the periphery of the brim part 12, through the air holes 113, the external air can be introduced into the outer yoke 1, the low-frequency part 2, and the high-frequency part 3. In a closed space to balance the pressure inside and outside the space.

FIG. 4 shows that the outer contact surface 211 of the shared ring magnet 21 is closely adhered to the inner surface of the top plate 110 of the outer yoke 1, so the outer yoke 1 is in close contact with the outer contact surface 211 of the shared ring magnet 21 and has the same magnetic properties. For example, the S pole shown in Figure 4 in this example. The shared ring magnet 21 includes a central hole 210 coaxial with the central hole 111 of the outer yoke 1 .

As shown in Figure 3 and Figure 4, the inner yoke 22 is in the shape of a flange, and the inner yoke 22 includes an inner shaft tube 221 and an outer peripheral disc 222, and the outer peripheral disc 222 is arranged on the outer peripheral edge of the inner shaft tube 221 , the outer peripheral plate 222 of the inner yoke 22 is tightly bonded and assembled on the inner contact surface 212 of the shared ring magnet 21 located on the opposite side of the outer yoke 1, that is, the shared ring magnet 21 is axially sandwiched between the inner yoke 22 Between the outer peripheral plate 222 and the top plate 110 of the outer yoke 1, the inner yoke 22 is in close contact with the inner contact surface 212 of the shared ring magnet 21 and has the same magnetic properties, for example, as shown in FIG. 4 of this example N pole, so it is obvious that the outer yoke 1 and the inner yoke 22 have different magnetic properties.

The outer diameter of the outer peripheral disc 222 is smaller than the inner diameter of the ring inner wall 112 of the outer yoke 1, the outer diameter of the inner shaft tube 221 is smaller than the inner diameter of the central hole 111 of the outer yoke 1, and the inner shaft tube 221 protrudes into the central hole 210 of the shared ring magnet 21, and The center hole 111 of the outer yoke 1 and the center of the inner shaft tube 221 are pierced with a center hole 220 for use as a sound guiding tube.

Bass audio section 2 includes a low-frequency voice coil 23, a low-frequency diaphragm 24, a sound guide cone 25, and a fixed ring 26, the low-frequency diaphragm 24 includes a central diaphragm 241, and the low-frequency voice coil 23 is set on the low-frequency diaphragm 24 and correspondingly extend axially between the ring inner wall 112 of the outer yoke 1 and the outer peripheral disc 222 of the inner yoke 22, the low frequency voice coil 23 maintains a radial gap with the ring inner wall 112 and the outer peripheral disc 222.

As shown in Figure 3 and Figure 4, the low-frequency diaphragm 24 includes an inner concave ring 243 and an outer concave ring 244, the low-frequency voice coil 23 is set at the inner concave ring 243, and the outer concave ring 244 is set at the outer yoke 1 on the brim portion 12.

The outer periphery of the low frequency diaphragm 24 is assembled on the cap edge 12 of the outer yoke 1 , and the fixing ring 26 is assembled on the cap edge 12 of the outer yoke 1 for fixing the low frequency diaphragm 24 .

The sound guide cone 25 is fixed on the outer peripheral disc 222 of the inner yoke 22, and the center of the sound guide cone 25 is provided with a sound guide hole 251. The sound guide hole 251 is coaxially corresponding to the central perforation 220 of the inner shaft tube 221 and communicates with each other, so as to The audio frequency of the treble part 3 is evenly distributed on the surface of the central diaphragm 241 of the bass part 2.

In this example, the outer yoke 1 is used as the S pole magnetic pole of the shared ring magnet 21, and the inner yoke 22 is used as the N pole magnetic pole of the shared ring magnet 21. When the bass audio signal is input to the low frequency voice coil 23, the generated The magnetic field will interact with the S-N pole magnetic field between the ring inner wall 112 of the outer yoke 1 and the outer peripheral disk 222 of the inner yoke 22 to produce magnetic interaction, and then the low-frequency diaphragm 24 vibrates to emit sound waves.

The high-frequency part 3 includes a high-frequency voice coil 31 and a high-frequency diaphragm 32. The high-frequency voice coil 31 is assembled on the high-frequency diaphragm 32 and extends into the central hole 111 of the outer yoke 1 and the center hole 111 of the inner yoke 22 in the corresponding axial direction. Between the inner shaft tubes 221 , there is another radial gap between the high frequency voice coil and the central hole 111 , and the inner shaft tube 221 , and the outer periphery of the high frequency diaphragm 32 is assembled on the crown portion 11 of the outer yoke 1 .

As shown in Figure 3 and Figure 4, the high-frequency diaphragm 32 includes an inner concave ring 321 and an outer concave ring 322, the high-frequency voice coil 31 is set at the inner concave ring 321, and the outer concave ring 322 is set at the outer yoke 1 On the crown part 11. The treble part 3 further includes another fixing ring 33 , and the other fixing ring 33 is assembled on the crown part 11 of the outer yoke 1 to fix the high frequency diaphragm 32 .

In this example, when the high-frequency audio signal is input to the high-frequency voice coil 31, the magnetic field generated by it will interact with the S-N pole magnetic field between the cap plate 110 of the outer yoke 1 and the inner shaft tube 221 of the inner yoke 22. Through the interaction of the magnetic force, the high-frequency diaphragm 32 vibrates to send out sound waves.

As shown in Figure 4, because, the inner axis pipe 221 of bass tone part 2 is communicated between the central diaphragm 241 of treble tone part 3 and bass tone part 2; The shaft tube 221 enables the central diaphragm 241 (shown in FIG. 3 ) of the bass part 2 to be in phase with the audio of the bass part 2 and output synchronously.

Because the utility model has the high-frequency part 3 and the low-frequency part 2, the sound waves of the high-frequency and low-frequency can be separated, which can effectively solve the problem of high-low frequency intermodulation distortion, and then by the structure of the coaxial earphone of the present utility model Designed to minimize the size of the headset.

Please refer to FIG. 5 , which is a cross-sectional view of a second preferred embodiment of the present invention. As shown in the figure, it has roughly the same structure as the previous embodiment, except that the earphone housing 7 is a housing 7 of an earphone earphone, so it includes an earplug 71, and the earplug 71 is formed along the earphone housing 7. radial extension.

Please refer to FIG. 6 and FIG. 7 , FIG. 6 is a perspective view of a third preferred embodiment of the present invention, and FIG. 7 is a cross-sectional view of a third preferred embodiment of the present invention. As shown in the figure, in this embodiment it has roughly the same structure as the first embodiment, the difference is that the earphone casing 8 is a casing 8 belonging to a full-face earphone, so it includes an earmuff 81, the earmuff 81 is extended axially by the earphone housing 8 .

The above-mentioned embodiments are only examples for convenience of description, and the scope of rights claimed by the utility model should be based on the scope of claims in the application, rather than limited to the above-mentioned embodiments.

Claims (10)

1, a kind of coaxial earphone of double frequency with shared magnetite is characterized in that, comprising:

One earphone case, in establish an accommodation space;

One outer yoke, be a cap shaped, should be mounted in this accommodation space of this earphone case by outer yoke, should comprise a cap bizet, reach a marginal ridge portion by outer yoke, this marginal ridge portion is located on the outer peripheral edges of this cap bizet, this cap bizet includes a crown plate, reaches a ring inwall, and this crown plate offers a medium pore;

One shares annular magnetic stone, is mounted on this crown plate inner face of this outer yoke, and it is corresponding coaxial with the medium pore that is somebody's turn to do outer yoke that this shared annular magnetite includes a centre bore;

Yoke in one, be one flange shape, should comprise central siphon in, reach a periphery dish by interior yoke, this periphery dish is located on the outer peripheral edges of central siphon in this, to be somebody's turn to do interior yoke by this periphery dish and be mounted on the opposite side that this is shared on annular magnetite and is positioned at this outer yoke, this periphery dish is less than this ring inwall of this outer yoke, central siphon is less than this medium pore of this outer yoke in being somebody's turn to do, should in central siphon protrude into this this centre bore of sharing annular magnetite, with this medium pore that should outer yoke, these interior central siphon central authorities wear a central perforation;

One bass portion, comprise a low frequency voice coil loudspeaker voice coil, reach a low frequency vibrating diaphragm, this low frequency voice coil loudspeaker voice coil be mounted on this low frequency vibrating diaphragm and this periphery dish of corresponding this ring inwall that extends axially into this outer yoke and this interior yoke between, this low frequency voice coil loudspeaker voice coil and this ring inwall, and this periphery dish all keep a radial clearance, this low frequency vibrating diaphragm periphery is mounted in this marginal ridge portion of this outer yoke; And

-high audio portion, comprise a high frequency voice coil loudspeaker voice coil, reach a high-frequency diaphragm, this high frequency voice coil loudspeaker voice coil be mounted on this high-frequency diaphragm and corresponding this medium pore that extends axially into this outer yoke with should in being somebody's turn to do between the interior central siphon of yoke, this high frequency voice coil loudspeaker voice coil and this medium pore, and should in central siphon all keep another radial clearance, this high-frequency diaphragm periphery is mounted on this cap bizet of this outer yoke.

2, the coaxial earphone of double frequency as claimed in claim 1, it is characterized in that, wherein this bass portion comprises-the leading note awl, this leading note awl is fixedly arranged on this periphery dish of yoke in this, this leading note awl central authorities offer-voice guide hole, this voice guide hole coaxial corresponding to central siphon in this this central perforation and be interconnected.

3, the coaxial earphone of double frequency as claimed in claim 1 is characterized in that, comprises a circuit board, and this circuit board comprises a frequency dividing circuit.

4, the coaxial earphone of double frequency as claimed in claim 1 is characterized in that, wherein should comprise a plurality of pores by outer yoke, and these a plurality of pores are opened in the periphery of this marginal ridge portion.

5, the coaxial earphone of double frequency as claimed in claim 1 is characterized in that, wherein this low frequency vibrating diaphragm comprises scrobicular ring in, reaches an outer scrobicular ring, and this low frequency voice coil loudspeaker voice coil is mounted on scrobicular ring place in this, and this outer scrobicular ring is mounted in this marginal ridge portion of this outer yoke.

6, the coaxial earphone of double frequency as claimed in claim 1 is characterized in that, wherein this high-frequency diaphragm comprises scrobicular ring in, reaches an outer scrobicular ring, and this high frequency voice coil loudspeaker voice coil is mounted on scrobicular ring place in this, and this outer scrobicular ring is mounted on this cap bizet of this outer yoke.

7, the coaxial earphone of double frequency as claimed in claim 1, it is characterized in that wherein this bass portion comprises a retainer ring, this high audio portion comprises another retainer ring, this retainer ring is mounted in this marginal ridge portion of this outer yoke, and this another retainer ring is mounted on this cap bizet of this outer yoke.

8, the coaxial earphone of double frequency as claimed in claim 1 is characterized in that, wherein this earphone case comprises an earplug, and this earplug is radially to be extended by this earphone case.

9, the coaxial earphone of double frequency as claimed in claim 1 is characterized in that, wherein this earphone case comprises an earmuff, and this earmuff is to be extended vertically by this earphone case.

10, the coaxial earphone of double frequency as claimed in claim 1 is characterized in that, wherein this earphone case comprises a pedestal and a protecgulum.

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