CN110798784A

CN110798784A - Broadband earphone loudspeaker

Info

Publication number: CN110798784A
Application number: CN201910942394.5A
Authority: CN
Inventors: 尹海昌; 赵燕鹏; 房晓斐
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-02-14

Abstract

The invention discloses a broadband earphone speaker, which comprises a ball top, a conductive vibrating diaphragm and a voice coil, wherein the ball top is provided with a ball hole; the top of the ball comprises a first conductive region and a second conductive region which are isolated from each other; the conductive diaphragm comprises a third conductive area and a fourth conductive area which are isolated from each other; the top of the ball is fixedly connected with the conductive vibrating diaphragm; the conductive diaphragm is electrically communicated with an external circuit; positive and negative connection wires of the voice coil are respectively connected with one of the first conductive area and the second conductive area; the first and second conductive regions are connected to one of the third and fourth conductive regions, respectively. Compared with the prior art, the invention has the beneficial effects that: the high-frequency response and the sensitivity of the loudspeaker are effectively expanded, meanwhile, the fatal hidden danger of the broken wire of the voice coil lead wire is avoided, the performance of the earphone moving coil loudspeaker unit is better improved, the related cost can be effectively reduced, and the earphone moving coil loudspeaker has wide market and quality improvement space for the application of the existing earphone loudspeaker and intelligent wearing.

Description

Broadband earphone loudspeaker

Technical Field

The invention relates to the field of earphones, in particular to a broadband earphone loudspeaker.

Background

Most of existing in-ear and semi-in-ear earphone horns adopt a circular single moving coil horn structure, as shown in fig. 1, the existing in-ear and semi-in-ear earphone horn structure is a common single moving coil earphone horn structure and is composed of a vibrating diaphragm 1, a voice coil 2, a magnet yoke 3, a magnet 4, a washer 5, a PCB 6, a protecting cover 7 and a U-shaped iron 8. Magnet 4, adopt glue bonding equipment between china department 5 and the yoke 3, the below of vibrating diaphragm 1 is equipped with voice coil loudspeaker voice coil 2, and a part of voice coil loudspeaker voice coil 2 is located the space of constituteing between magnet 4 and the yoke 3, when the process of magnet 4 to 3 transmission magnetic fluxes of yoke, china department 5 can receive the magnetic flux and correct the magnetic line of force from magnet 4, transmit the magnetic flux to voice coil loudspeaker voice coil 2 simultaneously, vibrating diaphragm 1 will produce the vibration along with voice coil loudspeaker voice coil 2's up-and-down motion this moment, the effect of protecting cover 7 is in order to form the sound hole and protect vibrating diaphragm 1. In this solution, the lead wire of the voice coil 2 is generally adhered to the bottom surface of the diaphragm 1 according to a certain track by using lead glue as shown in fig. 2, and is led out through a hole formed in the side surface of the yoke 3, and finally connected with a solder joint on the PCB 6 along the outside of the yoke 3 to form an electrical circuit.

Another fixing mode of the voice coil lead wire in the existing structure is to suspend the lead wire in the air without adopting lead wire glue for fixing, and the application effect of the voice coil lead wire in the high-frequency mode is better than that of the lead wire fixing glue by adopting the structural design due to the reduction of the weight of the lead wire glue, and is particularly shown in fig. 3.

However, the voice coil lead wire adopts a pasting mode or a suspension mode, and the following defects are all existed:

1. because the voice coil lead-out wire can participate in the same vibrations of making a round trip with the vibrating diaphragm when loudspeaker work, consequently use and arouse easily that the lead-out wire breaks because of fatigue damage through long-term to lead to the unable problem of using of loudspeaker.

2. The condition of broken lines also appears in the technical treatment process of fixing, bending, gluing and the like the voice coil lead-out wire, so that the defective rate of equipment production is improved, and the corresponding cost of man-hour personnel and the like is greatly improved.

3. In view of the above problems, it is necessary to use a high-tension copper wire for the selection of the lead wire, which increases the manufacturing cost of the device.

4. In the conventional and high-end loudspeaker, because the high-tension copper wire is generally used on the material selection of the lead-out wire, the quality of the voice coil is larger than that of a copper-clad aluminum voice coil, so that the quality of a vibration system is increased, the transient characteristic of a product is poor, the high-frequency cut-off frequency is low, the high frequency cannot be well expanded, and for a music earphone, the high-frequency bandwidth is insufficient, so that the music tone quality is greatly influenced, the sound is not bright enough, and the high-tone performance is insufficient.

5. Meanwhile, due to the high probability of wire breakage and the space obstruction occupation of the voice coil outgoing line in the existing structure, the relative sensitivity of the equipment is often not high, and the mass production of the high-power micro loudspeaker cannot be popularized.

6. Further, since the conventional structure is limited in terms of reproducing a wide-band sound source, a sheet having a low rigidity or a diaphragm having a small thickness is generally used for the diaphragm having a single-sheet structure in order to improve low-frequency performance, but sound pressure generated in a middle-high frequency region is reduced, and specific polarization is generated in a low frequency region, which increases a defect rate. On the contrary, if a thick diaphragm or a sheet with high rigidity is used, the low-frequency performance is reduced, and the audio balance is deteriorated. Therefore, the existing earphone speaker structure usually adopts a moving coil speaker to ensure low frequency performance and then adds a high-pitch moving iron unit to improve medium-high frequency performance, but this results in more complexity of the structure and significant increase of component cost.

Disclosure of Invention

The invention aims to provide a broadband earphone speaker, which is characterized by solving the fatal defect that the existing speaker structure is easy to break and crash, effectively improving the sound effect of the existing speaker structure in the aspect of high frequency while reducing the process cost and the production cost, enabling the comprehensive tone quality of the existing speaker structure to be brighter and layered, and bringing better hearing feeling to customers.

In order to achieve the purpose, the invention provides the following technical scheme: a broadband earphone speaker comprises a ball top, a conductive vibrating diaphragm and a voice coil; the top of the ball comprises a first conductive region and a second conductive region which are isolated from each other; the conductive diaphragm comprises a third conductive area and a fourth conductive area which are isolated from each other; the top of the ball is fixedly connected with the conductive vibrating diaphragm; the conductive diaphragm is electrically communicated with an external circuit; positive and negative connection wires of the voice coil are respectively connected with one of the first conductive area and the second conductive area; the first and second conductive regions are connected to one of the third and fourth conductive regions, respectively.

As optimization, the device also comprises a conducting ring; the conductive vibrating diaphragm is fixed on the conductive ring; the conductive ring comprises a fifth conductive area and a sixth conductive area which are isolated from each other; the fifth conductive area and the sixth conductive area are connected to one of the third conductive area and the fourth conductive area, respectively; the conductive diaphragm is electrically connected with an external circuit through the conductive ring.

Preferably, the conductive diaphragm comprises a diaphragm body; the surface of vibrating diaphragm body is equipped with electrically conductive cladding material or this internal electrically conductive intermediate layer that is equipped with of vibrating diaphragm.

Preferably, a first insulating isolation strip is arranged between the third conductive area and the fourth conductive area.

Preferably, a second insulating isolation strip 110e is arranged between the first conductive area and the second conductive area.

Preferably, the first conductive area and the second conductive area are respectively provided with a first welding point and a second welding point; and the positive and negative connection wires of the voice coil are respectively connected with one of the first welding point and the second welding point.

As optimization, a first avoidance hole and a second avoidance hole are formed in the top of the ball; and positive and negative connection wires of the voice coil respectively penetrate through one of the first avoidance hole and the second avoidance hole and then are respectively connected with one of the first welding point and the second welding point.

Preferably, the voice coil is fixedly connected with the top of the ball or the conductive diaphragm.

Preferably, the voice coil is made of copper-clad aluminum voice coil wires.

As optimization, the upper part of the voice coil is fixedly connected with the top of the ball, and a basin stand is arranged below the voice coil; the bottom end of the basin stand is provided with a magnetic cover; an inner magnet is arranged in the inner ring of the voice coil on the magnetic shield; an inner magnet washer is arranged above the inner magnet; the top part of the ball is positioned at the middle opening of the conductive vibrating diaphragm; the conductive vibrating diaphragm is fixed above the basin frame through the conductive ring.

As optimization, an outer magnet is further arranged at the outer ring of the voice coil above the magnetic shield; and an external magnet washer is arranged on the external magnet.

Compared with the prior art, the design of the voice coil, the lead wire and the electric path structure is improved by redesigning and improving, the conducting layer of the conductive vibrating diaphragm is used as the electric layer of the positive and negative conductive loops, the voice coil lead wire is prevented from participating in the back-and-forth bending movement when the diaphragm works, the hidden danger of fatigue wire breakage is eliminated, the quality of a vibration system is effectively reduced, the frequency response is widened, the sensitivity and the power of the loudspeaker are effectively improved, the conducting layer is widened due to the fact that the part of the lead wire led out to the outer edge of the loudspeaker is cancelled, and the potential failure factor of the conduction is reduced, so that the design has very important reference significance for the micro loudspeaker and for improving the power response and reducing the wire breakage risk of the medium-large loudspeaker.

The invention has the following specific beneficial effects:

1. the voice coil lead wire does not participate in the back-and-forth bending motion of the diaphragm during the work of the loudspeaker, so that the lead wire is not broken due to fatigue damage caused by the reciprocating motion, and the fatal defect that the existing loudspeaker structure is easy to break and crash is overcome.

2. The voice coil loudspeaker voice coil lead-out wire is very short, and the snap-on has saved processes such as lead wire bending, lead wire fixed glue, has effectively reduced the risk of technology processing procedure to voice coil loudspeaker voice coil lead-out wire damage, has further promoted the stability and the qualification rate of product, effectual reduction technology cost.

3. Because this patent has eliminated the risk of lead-out wire broken string, consequently can use copper clad aluminum wire or conventional wire rod, this effectively reduces the manufacturing cost of voice coil loudspeaker voice coil.

4. The positive and negative electrode outgoing lines do not participate in bending movement, so that the magnetic circuit design does not need to avoid the lead, and more spaces are used for designing a closed annular magnetic circuit, so that high sensitivity and high power design and application of a double magnetic circuit are realized, the sensitivity and the power can be effectively improved, the problem of loudspeaker disconnection caused by high power is avoided, and the problem of small power of the micro loudspeaker in the conventional structure is solved.

5. Because this patent has eliminated the broken string risk, consequently can normally use copper clad aluminium voice coil line, effectively reduce the quality of voice coil loudspeaker voice coil like this to can promote product transient state characteristic and high frequency cut-off frequency, the high frequency obtains better expansion, makes tone quality brighter, has the stereovision more.

6. Because this patent has compromise the low frequency performance in the aspect of the effective extension of high frequency simultaneously again, so this patent only just can realize the effect of two units even polycell of present moving coil + moving iron with a loudspeaker unit, can effectively reduce manufacturing cost and promote manufacturability, effectively promotes the quality of loudspeaker simultaneously, gives the better sense of hearing of customer.

Drawings

Fig. 1 is a schematic structural diagram in the background art of the present invention.

Fig. 2 is a schematic view of a fixing method of an outgoing line in embodiment 1 of the background art of the present invention.

Fig. 3 is a schematic diagram of a fixing method of an outgoing line in embodiment 2 of the background art.

Fig. 4 is an exploded perspective view of the present invention.

FIG. 5 is a schematic view of the structure of the present invention.

Fig. 6 is a schematic structural view of the dome of the present invention.

The voice coil comprises a diaphragm 1, a voice coil 2, a magnetic yoke 3, a magnet 4, a washer 5, a PCB 6, a protective cover 7, a U-shaped iron 8, a conductive diaphragm 10, a third conductive region 10a, a fourth conductive region 10b, a conductive ring 20, a fifth conductive region 20a, a sixth conductive region 20b, a basin frame 30, a magnetic cover 40, an outer magnet 50, an inner magnet 60, an inner magnetic washer 80, an outer magnetic washer 90, a voice coil 100, a ball top 110, a first conductive region 110a, a second conductive region 110b, a second insulating isolation belt 110e, a first welding point 110a1, a second welding point 110b1, a first avoidance hole 110a2 and a second avoidance hole 110b 2.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "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.

Embodiment 1 is a wideband earphone speaker, which includes a dome 110, a conductive diaphragm 10, a voice coil 100, and a conductive ring 20.

The top ball portion 110 includes a first conductive region 110a and a second conductive region 110b isolated from each other, wherein the first conductive region 110a and the second conductive region 110b are made of conductive material, and a second insulating isolation strip 110e is disposed between the first conductive region 110a and the second conductive region 110 b; the second insulating isolation strip 110e is provided for insulation, so that two parts of the ball top 110 are not conducted with each other, thereby forming a positive and negative electrode path for transmitting an electric signal.

The conductive diaphragm 10 includes a third conductive region 10a and a fourth conductive region 10b that are isolated from each other, wherein the third conductive region 10a and the fourth conductive region 10b are made of a conductive material, and a first insulating isolation strip is disposed between the third conductive region 10a and the fourth conductive region 10 b; similarly, two parts of the conductive diaphragm 10 are not conducted with each other, so as to form a positive and negative pole path for transmitting signals.

First and second

conductive regions

110a and 110b are provided with first and second bonding pads 110a and 1 and 110b1, respectively; positive and negative connection lines of the voice coil 100 are connected to one of the first and second welding points 110a1 and 110b1, respectively; the first and second

conductive areas

110a and 110b are connected to one of the third and fourth conductive areas 10a and 10b, respectively.

The conductive diaphragm 10 is fixed on the conductive ring 20; the conductive ring 20 includes a fifth conductive region 20a and a sixth conductive region 20b that are isolated from each other; the fifth conductive area 20a and the sixth conductive area 20b are connected to one of the third conductive area 10a and the fourth conductive area 10b, respectively.

The ball top 110 is located at the middle opening of the conductive diaphragm 10, and the two are fixedly connected; the upper part of the voice coil 100 is fixedly connected with the ball top 110; the fixed connections here may be connected by means of conductive glue or the like to form conductive paths. A basin stand 30 is arranged below the voice coil 100; the bottom end of the basin stand 30 is provided with a magnetic cover 40; an inner magnet 60 is arranged in the inner ring of the voice coil 100 on the magnetic shield 40; an inner magnet washer 80 is arranged above the inner magnet 60 and is bonded with the inner magnet washer; the conductive diaphragm 10 is fixed above the basin stand 30 through the conductive ring 20.

The conductive diaphragm 10 is electrically connected to an external circuit through the conductive ring 20. Positive and negative leads are respectively drawn through the fifth conductive area 20a and the sixth conductive area 20b of the conductive bar 20 for connection to pads on the PCB below the frame 30.

Further, the conductive diaphragm 10 includes a diaphragm body; the surface of vibrating diaphragm body is equipped with electrically conductive cladding material or this internal electrically conductive intermediate layer that is equipped with of vibrating diaphragm. The conductive plating layer or the conductive interlayer is very thin and is generally within 20um, so that the frequency response of the loudspeaker is less influenced by low frequency compared with the frequency response of a conventional loudspeaker, and the low frequency response can be better reproduced; meanwhile, the surface of the vibrating diaphragm body is provided with the conductive coating or the vibrating diaphragm body is internally provided with the conductive interlayer, so that the vibrating diaphragm has a conductive effect, namely the conductive layer is widened, and the potential failure factor of the conductive is reduced, so that the vibrating diaphragm has very important reference significance for the micro-horn and the medium-large horn for improving the power response and reducing the wire breakage risk.

Further, the voice coil 100 is made of copper-clad aluminum coil wire. Because the positive and negative wiring of voice coil 100 no longer participates in the back and forth bending motion, so can use copper clad aluminium voice coil wire, needn't use the ultra-high tension voice coil wire again, the advantage that produces with this is that the manufacturing cost of voice coil has been reduced on the one hand, on the other hand can reduce the quality of voice coil, thereby make the high frequency response of loudspeaker obtain effective extension, have better high frequency response for conventional loudspeaker, this has very important improvement meaning to the not good phenomenon of present conventional earphone loudspeaker high frequency response, have extensive important application demand to products such as present smart watch, bracelet.

Example 2, the specific differences of example 2 over example 1 are: the upper side of the voice coil 100 is fixedly connected with the conductive diaphragm 10.

Further, the ball top 110 is further provided with a first avoidance hole 110a2 and a second avoidance hole 110b 2; here, the first and second escape holes 110a2 and 110b2 are provided at outer edges of the first and second

conductive areas

110a and 110b, respectively; positive and negative connection lines of the voice coil 100 respectively pass through one of the first and second escape holes 110a2 and 110b2 and then are respectively connected to one of the first and second welding points 110a1 and 110b 1. The advantage of this mode is that the positive and negative connection wires of voice coil 100 vibrate along with ball top 110 when the loudspeaker is working, so the back-and-forth bending vibration of the positive and negative connection wires of voice coil 100 is avoided, and the potential failure risk of wire breakage of the connection wires at the root and outer edge due to vibration is avoided.

Further, an outer magnet 50 is further arranged at the outer ring of the voice coil 100 above the magnetic shield 40; an external magnet washer 90 is arranged on the external magnet 50. The positive and negative outgoing lines do not participate in bending movement, so that the magnetic circuit design does not need to avoid the leads, and more space is provided for designing a closed annular magnetic circuit, so that high-sensitivity and high-power design and application of a double magnetic circuit are realized, the sensitivity and the power can be effectively improved, the problem of loudspeaker disconnection caused by high power is avoided, and the problem of low power of the micro loudspeaker in the conventional structure is solved.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A broadband earphone speaker is characterized in that: comprises a ball top (110), a conductive diaphragm (10) and a voice coil (100); the ball top (110) includes a first conductive region (110 a) and a second conductive region (110 b) isolated from each other; the conductive diaphragm (10) comprises a third conductive area (10 a) and a fourth conductive area (10 b) which are isolated from each other; the ball top (110) is fixedly connected with the conductive diaphragm (10); the conductive diaphragm (10) is in electrical communication with an external circuit; positive and negative wirings of the voice coil (100) are respectively connected with one of the first conductive region (110 a) and the second conductive region (110 b); the first conductive area (110 a) and the second conductive area (110 b) are connected to one of the third conductive area (10 a) and the fourth conductive area (10 b), respectively.

2. The broadband earpiece speaker of claim 1, wherein: further comprising a conductive ring (20); the conductive diaphragm (10) is fixed on the conductive ring (20); the conductive ring (20) comprises a fifth conductive area (20 a) and a sixth conductive area (20 b) isolated from each other; said fifth (20 a) and sixth (20 b) conductive areas being connected to one of the third (10 a) and fourth (10 b) conductive areas, respectively; the conductive diaphragm (10) is electrically connected with an external circuit through the conductive ring (20).

3. The broadband earpiece speaker of claim 1, wherein: the conductive diaphragm (10) comprises a diaphragm body; the surface of vibrating diaphragm body is equipped with electrically conductive cladding material or this internal electrically conductive intermediate layer that is equipped with of vibrating diaphragm.

4. The broadband earpiece speaker of claim 1, wherein: a first insulating isolation strip is arranged between the third conductive area (10 a) and the fourth conductive area (10 b).

5. The broadband earpiece speaker of claim 1, wherein: a second insulating isolation strip (110 e) is arranged between the first conductive area (110 a) and the second conductive area (110 b).

6. The broadband earpiece speaker of claim 1, wherein: a first welding point (110 a 1) and a second welding point (110 b 1) are respectively arranged on the first conductive area (110 a) and the second conductive area (110 b); the positive and negative connection lines of the voice coil (100) are respectively connected to one of the first and second welding points (110 a1, 110b 1).

7. The broadband earpiece speaker of claim 6, wherein: a first avoidance hole (110 a 2) and a second avoidance hole (110 b 2) are formed in the top of the ball (110); and positive and negative connection wires of the voice coil (100) respectively penetrate through one of the first avoidance hole (110 a 2) and the second avoidance hole (110 b 2) and then are respectively connected with one of the first welding point (110 a 1) and the second welding point (110 b 1).

8. The broadband earpiece speaker of claim 1, wherein: the voice coil (100) is fixedly connected with the ball top (110) or the conductive diaphragm (10).

9. The broadband earpiece speaker of claim 1, wherein: the voice coil (100) is made of copper-clad aluminum voice coil wire.

10. The broadband earpiece speaker of claim 2, wherein: the upper part of the voice coil (100) is fixedly connected with the top part (110) of the ball, and the lower part of the voice coil (100) is provided with a basin stand (30); the bottom end of the basin frame (30) is provided with a magnetic cover (40); an inner magnet (60) is arranged in the inner ring of the voice coil (100) on the magnetic shield (40); an inner magnet washer (80) is arranged above the inner magnet (60); the ball top (110) is positioned at the middle opening of the conductive diaphragm (10); the conductive diaphragm (10) is fixed above the basin frame (30) through the conductive ring (20).

11. The broadband earpiece speaker of claim 10, wherein: an outer magnet (50) is further arranged at the outer ring of the voice coil (100) above the magnetic shield (40); an external magnet washer (90) is arranged on the external magnet (50).

12. An electronic device, characterized in that: a broadband earpiece speaker as claimed in any one of claims 1 to 11.