CN216752093U - Horn module - Google Patents

Abstract

The application provides a loudspeaker module, including loudspeaker basin frame, vibration system and magnetic circuit, vibration system includes the sound membrane and the voice coil loudspeaker voice coil of being connected with the sound membrane, the sound membrane is fixed to loudspeaker basin frame, the internal diameter of voice coil loudspeaker voice coil is 0.25 times to 0.35 times of the external diameter of loudspeaker basin frame, the sound membrane includes diaphragm book ring portion, voice coil loudspeaker voice coil laminating portion and ball top, the width of ball top is 0.23 times to 0.3 times of the external diameter of loudspeaker basin frame, 0.1 times to 0.15 times of the external diameter of diaphragm book ring portion, the protruding height of ball top is 1 times to 1.5 times of the protruding height of diaphragm book ring portion. Through the internal diameter that reduces the voice coil, reduce the magnetic flux through the voice coil to reduce the induced-current that disturbs the magnetic field and produce the voice coil, with the end of reducing loudspeaker module and making an uproar. The dimension specifications of all components of the sound film are changed correspondingly so as to keep the sound quality of the loudspeaker module. The loudspeaker module of this application has that anti-interference magnetic field ability is stronger, and the advantage that the end is noisy is lower.

Description

Horn module

Technical Field

The application belongs to the technical field of speaker equipment, and more specifically says, relates to loudspeaker module.

Background

The existing speaker devices such as earphones and stereos comprise a plurality of electronic components such as inductors, capacitors, batteries, FPCs and the like. After the electronic components are electrified, currents flowing through the electronic components can generate radiation magnetic fields, and when the radiation magnetic fields change along with factors such as the magnitude and the direction of the currents, induction currents can be generated by voice coils in loudspeaker modules of the equipment, so that background noise (interference noise) is generated by a loudspeaker. The existence of the noise floor can influence the whole acoustic quality of the loudspeaker module and the acoustic experience of a user.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the present application is to provide a loudspeaker module to solve the technical problem that a loudspeaker existing in the prior art is easily influenced by a radiation magnetic field to generate noise floor.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

the utility model provides a loudspeaker module, includes loudspeaker basin frame, vibrating system and drive the magnetic circuit of vibrating system sound production, vibrating system include the sound membrane and with the voice coil loudspeaker voice coil that the sound membrane is connected, the sound membrane is fixed to loudspeaker basin frame, the internal diameter of voice coil loudspeaker voice coil does 0.25 times to 0.35 times of the external diameter of loudspeaker basin frame, the sound membrane includes that the diaphragm that connects gradually from the outer fringe to the center rolls over ring portion, voice coil loudspeaker voice coil laminating portion and ball top, the width of ball top does 0.23 times to 0.3 times of the external diameter of loudspeaker basin frame, the width that the diaphragm rolled over ring portion does 0.1 times to 0.15 times of the external diameter of loudspeaker basin frame, the protruding height at ball top does 1 times to 1.5 times of the protruding height of diaphragm book ring portion.

As a further improvement of the above technical solution:

optionally, the voice coil is formed by winding a voice coil wire with a resistivity greater than that of copper, and the voice coil wire is a flat wire.

Optionally, the flat wire is an aluminum flat wire.

Optionally, the vibration system further includes a centering branch piece disposed on the inner side of the sound film, the voice coil is connected to the inner side of the centering branch piece, and a conductive portion is disposed on the centering branch piece.

Optionally, the conductive part is including connecting first pad, second pad, third pad and fourth pad on the centering branch piece, first pad be used for with the input electricity of voice coil loudspeaker voice coil is connected, the second pad be used for with the output electricity of voice coil loudspeaker voice coil is connected, the third pad be used for with external power supply's input electricity be connected, the fourth pad be used for with external power supply's output electricity be connected, first pad with the third pad electricity is connected, the second pad with the fourth pad electricity is connected.

Optionally, the centering branch piece includes a central hole and peripheral holes surrounding the central hole and arranged at intervals, the first pad and the second pad are located in the central hole, and the third pad and the fourth pad are located in the peripheral holes.

Optionally, the magnetic circuit system includes a magnetic cover disposed on a side of the speaker frame away from the sound film, a magnet disposed on an inner side of the magnetic cover, and a magnetic shield disposed on an outer side of the magnetic cover.

Optionally, the magnetic shield is a nickel-iron alloy magnetic shield.

Optionally, the diaphragm folded ring portion and the top of the ball are both protruded towards the outer side of the voice diaphragm, and the width of the voice coil attaching portion is 1.5 times to 2.5 times of the thickness of the voice coil.

Optionally, the top of the ball is the top of a biological paper ball, and 4-12 bar patterns are arranged on the top of the biological paper ball.

The application provides a loudspeaker module's beneficial effect lies in:

the application provides a loudspeaker module, including loudspeaker basin frame, the magnetic circuit of vibration system and drive vibration system sound production, vibration system includes the sound membrane and the voice coil loudspeaker voice coil of being connected with the sound membrane, the sound membrane is fixed to loudspeaker basin frame, the internal diameter of voice coil loudspeaker voice coil is 0.25 times to 0.35 times of the external diameter of loudspeaker basin frame, the sound membrane includes the diaphragm book ring portion that connects gradually from the outer fringe to the center, voice coil loudspeaker voice coil laminating portion and ball top, the width of ball top is 0.23 times to 0.3 times of the external diameter of loudspeaker basin frame, the width of diaphragm book ring portion is 0.1 times to 0.15 times of the external diameter of loudspeaker basin frame, the protruding height of ball top is 1 times to 1.5 times of the protruding height of diaphragm book ring portion. Through the internal diameter scope that reduces the voice coil loudspeaker voice coil, reduce the magnetic flux through the voice coil loudspeaker voice coil area of encircleing to reduce the induced-current that disturbs the magnetic field and produce the voice coil loudspeaker voice coil, with the end noise that reduces loudspeaker module. The size specification of each component of the sound film is correspondingly changed so as to keep the sound quality of the loudspeaker module.

Compared with the existing horn module, the horn module has the advantages of stronger anti-interference magnetic field capability and lower bottom noise.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a first schematic view of a disassembled structure of a horn module provided in the present application;

fig. 2 is a schematic view of a disassembled structure of the horn module provided in the present application;

fig. 3 is a schematic cross-sectional structural view of the horn module provided in the present application;

fig. 4 is a schematic view of a partially enlarged structure of the speaker module provided in the present application;

fig. 5 is a schematic perspective view of a speaker module according to the present disclosure;

fig. 6 is a first schematic perspective view of a centering support of the speaker module according to the present application;

fig. 7 is a schematic perspective view of a centering support of the speaker module according to the present application;

fig. 8 is a schematic cross-sectional structural view of a sound membrane of the speaker module provided in the present application;

fig. 9 is a schematic top view of a speaker frame of the speaker module according to the present application.

Wherein, in the figures, the respective reference numerals:

1. a loudspeaker basin frame; 2. A sound membrane;

21. a diaphragm loop part; 22. A voice coil attachment part;

23. a ball top; 3. A voice coil;

4. a centering disk; 41. A first pad;

42. a second pad; 43. A third pad;

44. a fourth pad; 45. A central bore;

46. a peripheral aperture; 5. A magnetic shield;

6. a magnet; 7. A magnetic shield;

8. a tuning net.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The existing speaker devices such as earphones and stereos comprise a plurality of electronic components such as inductors, capacitors, batteries, FPCs and the like. After the electronic components are electrified, currents flowing through the electronic components can generate radiation magnetic fields, and when the radiation magnetic fields change along with factors such as current magnitude and direction, induction currents can be generated by voice coils in loudspeaker modules of the equipment, so that the loudspeaker generates noise.

Copper, a commonly used metal, has excellent characteristics such as low resistivity due to its good thermal conductivity, oxidation resistance and ductility, and is a main material for manufacturing electric wires. The resistivity of copper is 1.75X 10^-8. The voice coil loudspeaker voice coil in current loudspeaker module mainly adopts the copper line voice coil loudspeaker voice coil, also because copper has less resistivity, causes the resistance of the voice coil loudspeaker voice coil of being made by the copper line winding less, and the voice coil loudspeaker voice coil is very easily influenced by external disturbance radiation magnetic field, produces induced-current to form loudspeaker module's end noise.

As shown in fig. 1 and 8, the present embodiment provides a loudspeaker module, including loudspeaker frame 1, a vibration system and a magnetic circuit system for driving the vibration system to generate sound, the vibration system includes a sound film 2 and a voice coil 3 connected to the sound film 2, the sound film 2 is fixed to the loudspeaker frame 1, an inner diameter of the voice coil 3 is 0.25 times to 0.35 times an outer diameter of the loudspeaker frame 1, the sound film 2 includes a diaphragm bending portion 21, a voice coil fitting portion 22 and a dome portion 23 sequentially connected from an outer edge to a center, a width of the dome portion 23 is 0.23 times to 0.3 times the outer diameter of the loudspeaker frame 1, a width of the diaphragm bending portion 21 is 0.1 times to 0.15 times the outer diameter of the loudspeaker frame 1, and a protrusion height of the dome portion 23 is 1 times to 1.5 times the protrusion height of the diaphragm bending portion 21.

Wherein the inner diameter of the voice coil 3 is shown as R in fig. 3, and the outer diameter of the speaker frame 1 is shown as R in fig. 9. According to the calculation formula of the electromagnetic induction law, the larger the area surrounded by the voice coil 3 is, the more the magnetic flux passing through the voice coil 3 is, the larger the induced current generated by the voice coil 3 is. Traditional voice coil 3's internal diameter size generally is 0.40 times to 0.52 times of loudspeaker basin frame 1 external diameter, voice coil 3 is under this internal diameter scope, the influence of interference magnetic field to voice coil 3 is stronger, therefore, establish the internal diameter of voice coil 3 into 0.25 times to 0.35 times of loudspeaker basin frame 1's external diameter, in order to reduce voice coil 3's internal diameter scope, be favorable to reducing the magnetic flux through the voice coil 3 area of encircleing, be favorable to reducing the induced-current that interference magnetic field produced to voice coil 3, be favorable to reducing the end of loudspeaker module and make an uproar.

When the cross-sectional shape of the voice coil 3 is a circular ring (the voice coil 3 has a thickness, an inner ring of the circular ring corresponds to an inner ring of the voice coil 3, and an outer ring of the circular ring corresponds to an outer ring of the voice coil 3), the inner diameter of the voice coil 3 specifically refers to the diameter of the inner ring of the circular ring; when the sectional shape of the horn frame 1 is circular (excluding the ear parts which are positioned at both sides of the horn frame 1 and extend out of the main body of the horn frame 1), the outer diameter of the horn frame 1 is circular. When the cross section of the voice coil 3 can also be in an elliptical ring shape, the inner diameter of the voice coil 3 specifically refers to the length of the long axis of the inner ring of the elliptical ring; when the sectional shape of the horn basin frame 1 is an ellipse, the outer diameter of the horn basin frame 1 is the length of the long axis of the ellipse.

The diaphragm flange part 21, the voice coil attaching part 22 and the dome part 23 of the diaphragm 2 may be integrally formed or may be separately connected in sequence. Due to the reduction of the inner diameter of the voice coil 3, the components of the voice diaphragm 2 also need to be changed in size to maintain the sound quality of the speaker module.

The width of the ball top 23 is specifically the width as indicated by L3 in fig. 8. The external diameter of loudspeaker basin frame 1 specifically indicates as shown in fig. 9R, and the width of ball top portion 23 is 0.23 times to 0.3 times of the external diameter of loudspeaker basin frame 1, can avoid ball top portion 23 because of the size undersize not good shaping, also can avoid ball top portion 23 because of the size oversize with the voice coil loudspeaker voice coil 3 mismatch.

The width of diaphragm folded ring part 21 specifically refers to the width as shown by L1 in fig. 8, and the outer diameter of loudspeaker basin frame 1 specifically refers to as shown by R in fig. 9, and the width of diaphragm folded ring part 21 is between 0.1 times to 0.15 times of the outer diameter of loudspeaker basin frame 1, can debug the better low frequency effect of this loudspeaker module.

The dome 23 of the diaphragm 2 mainly affects the high-frequency performance of the horn module, and theoretically, the better the rigidity and height of the dome 23 are, the better the high-frequency performance of the horn module is. The convex height of the ball top portion 23 is specifically the convex height shown as H1 in fig. 8; the raised height of the diaphragm hinge part 21 specifically refers to the raised height as shown in H2 in fig. 8. The bulge height of dome portion 23 is 1 times to 1.5 times the bulge height of diaphragm dog-ear portion 21, can not only guarantee that the loudspeaker module has better high-frequency performance, also can adapt to the high requirement of the current technology degree of difficulty and loudspeaker module.

Compared with the existing horn module, the horn module has the advantages of stronger anti-interference magnetic field capability and lower bottom noise.

In one embodiment, the voice coil 3 is wound with the voice coil 3 wire having a resistivity greater than copper, and the voice coil 3 wire is a flat wire. The flat wire is also called a flat wire, and refers to a special-shaped metal wire with a section similar to a round corner rectangle. The voice coil loudspeaker voice coil flat wire and the voice coil loudspeaker voice coil round wire that the sectional area equals are when coiling voice coil loudspeaker voice coil 3, and the space between the voice coil loudspeaker voice coil flat wire is less than the voice coil loudspeaker voice coil round wire, and the duty cycle that the flat wire compared in the round wire is higher. In the voice coil 3 with the same space volume, the length of the flat wire is greater than that of the round wire, so that the resistance of the voice coil 3 can be improved, the induced current generated by the interference magnetic field on the voice coil 3 is reduced, and the generation of bottom noise is reduced. Compared with the existing copper voice coil wire, the voice coil wire with the resistivity larger than that of copper has higher resistance of the voice coil 3, is more favorable for reducing induced current generated by an interference magnetic field on the voice coil 3, and reduces bottom noise.

In one embodiment, the flat wire is an aluminum flat wire. Aluminum is also a commonly used metal, aluminum has good oxidation resistance, and the resistivity of aluminum is 2.83 x 10^-8Greater than the resistivity of copper. Moreover, aluminum has a density lower than copper, and a flat aluminum wire having the same volume is lighter in weight than a flat copper wire.

In other embodiments, the flat wire may also be a flat iron wire, iron also being a common metal, iron having a resistivity of 9.78 x 10^-8And also greater than the resistivity of copper.

As shown in fig. 2 and 3, in one embodiment, the vibration system further includes a damper 4 disposed inside the diaphragm 2, the voice coil 3 is connected to the inside of the damper 4, and the damper 4 is provided with a conductive portion.

The voice coil 3 is connected to the inside of the damper 4 by means of bonding or the like, and the inside of the diaphragm 2 is connected to the outside of the damper 4. The permanent magnet of loudspeaker module produces the constant magnetic field, and after voice coil loudspeaker voice coil 3 circular telegram, alternating current signal input voice coil loudspeaker voice coil 3, according to the left-hand rule, circular telegram voice coil loudspeaker voice coil 3 receives magnetic field force and reciprocating motion in the constant magnetic field, and voice coil loudspeaker voice coil 3 drives the vibration of sound diaphragm 2, promotes the air, and sound. Since the thickness of the damper 4 is much smaller than the width of the damper 4, the damper 4 is easily deformed in the thickness direction. When the voice coil 3 is connected to the centering branch piece 4, the linear motion of the voice coil 3 along the thickness direction of the centering branch piece 4 is less influenced, and the motion of the voice coil 3 along the length and width direction of the centering branch piece 4 is more influenced, so that the voice coil 3 is kept to perform linear motion of cutting a magnetic induction line in a permanent magnetic field of the horn module. The conductive part of the centering disk 4 can electrically connect the voice coil 3 with an external circuit, and the conductive part of the centering disk 4 can reduce the number of times that the lead-out wire of the voice coil 3 needs to be bent, so that the possibility of the broken aluminum flat wire is reduced, and the service life of the voice coil 3 is prolonged.

As shown in fig. 6 and 7, in one embodiment, the conductive portion includes a first pad 41, a second pad 42, a third pad 43, and a fourth pad 44 connected to the damper 4, the first pad 41 is used for electrically connecting to an input terminal of the voice coil 3, the second pad 42 is used for electrically connecting to an output terminal of the voice coil 3, the third pad 43 is used for electrically connecting to an input terminal of an external power supply, the fourth pad 44 is used for electrically connecting to an output terminal of the external power supply, the first pad 41 and the third pad 43 are electrically connected, and the second pad 42 is electrically connected to the fourth pad 44. The first pad 41, the second pad 42, the third pad 43, and the fourth pad 44 are mounted on the spider 4 at intervals from each other, the first pad 41 and the third pad 43 are electrically connected by a wire provided on the spider 4, and the second pad 42 and the fourth pad 44 are electrically connected by a wire provided on the spider 4. The first pad 41, the second pad 42, the third pad 43 and the fourth pad 44 are connected to the damper 4, but it should not be understood that the first pad 41, the second pad 42, the third pad 43 and the fourth pad 44 are fixedly mounted on the damper 4, and the first pad 41, the second pad 42, the third pad 43 and the fourth pad 44 may also be indirectly connected to the damper 4 through electrical connectors such as wires.

As shown in fig. 6 and 7, in one embodiment, the centering chip 4 includes a central hole 45, and peripheral holes 46 surrounding the central hole 45 and spaced apart from each other, the first pad 41 and the second pad 42 being located in the central hole 45, and the third pad 43 and the fourth pad 44 being located in the peripheral holes 46.

Because voice coil 3 is connected when centering branch 4, the setting of the centre bore 45 of laminating centering branch 4, first pad 41 and second pad 42 are located centre bore 45, can reduce the distance of first pad 41 and second pad 42 apart from the input and the output of voice coil 3. When the input and output ends of the voice coil 3 are arranged oppositely in the radial direction of the voice coil 3, the first land 41 and the second land 42 are also arranged oppositely in the radial direction of the center hole 45, thereby fitting the input and output ends of the voice coil 3. The third pad 43 and the fourth pad 44 are located in the peripheral hole 46, and are connected to the pins on the horn frame 1, and are electrically connected to an external circuit through the pins on the horn frame 1.

As shown in fig. 2 and 3, in one embodiment, the magnetic circuit system includes a magnetic cover 5 disposed on a side of the speaker frame 1 facing away from the sound diaphragm 2, a magnet 6 disposed inside the magnetic cover 5, and a magnetic shield 7 disposed outside the magnetic cover 5.

The magnetic shield 5 is the U-shaped iron in the traditional horn module, and the magnetic shield 5 is matched with the magnet 6 to form a closed magnetic field with uniform distribution and uniform direction, so that the magnetic leakage of the magnet 6 is reduced. A magnetic gap for reciprocating the voice coil 3 in the axial direction (S direction in fig. 4) is formed between the magnetic cover 5 and the magnet 6. As shown in fig. 4, the magnet 6 of the speaker module generates a constant magnetic field, when the voice coil 3 is energized, an alternating current signal is input to the voice coil 3, and according to the left-hand rule, the energized voice coil 3 is subjected to a magnetic field force in the constant magnetic field to reciprocate, and the voice coil 3 drives the diaphragm 2 to vibrate to push air and generate sound. The magnetic cover 5 is used for generating a closed magnetic field with uniform distribution by matching with the magnet 6 and also has the function of isolating part of external interference magnetic fields.

In one embodiment, the magnetic shield 7 is a nickel-iron alloy magnetic shield.

The magnetic shield 7, i.e. the magnetic shield, the magnetic shield 7 is made of a highly magnetically permeable material, for example made of a nickel-iron alloy. Magnetic shield 7 can be with the magnetic induction line that produces to loudspeaker module direction radiation in external disturbance magnetic field, and the direction of guide to back of voice coil loudspeaker voice coil 3 position on the basis of the isolation interference magnetic field of magnetic shield 5, further strengthen the isolation effect to interference magnetic field to further reduce the magnetic field intensity in the interference magnetic field that voice coil loudspeaker voice coil 3 received, reduce the induced-current that interference magnetic field produced to voice coil loudspeaker voice coil 3, thereby reduce the end of loudspeaker module and make an uproar.

As shown in fig. 5, in one embodiment, the diaphragm hinge portion 21 and the ball top portion 23 both protrude toward the outside of the diaphragm 2, and the voice coil attachment portion 22 has a width 1.5 to 2.5 times the thickness of the voice coil 3.

The width of the voice coil joint 22 is specifically the width as shown by L2 in fig. 8, the thickness of the voice coil 3 is as shown by L4 in fig. 4, and the width of the voice coil joint 22 is 1.5 times to 2.5 times the thickness of the voice coil 3, so that the bonding firmness of the voice coil 3 and the voice diaphragm 2 can be ensured.

In one embodiment, the top 23 of the ball is a bio-paper ball top with 4-12 ribs on the top. In order to reduce the weight of a vibration system consisting of the sound film 2, the voice coil 3 and the like and improve the sensitivity of the vibration system, the material of the dome of the sound film 2 is replaced by a lighter biological paper material from a traditional resin material, and meanwhile, 4-12 bar-shaped patterns are arranged on the dome of the sound film 2 in order to ensure that the dome of the sound film 2 has better rigidity.

As shown in fig. 1 and 2, in one embodiment, the speaker module further includes a tuning net 3 disposed on the magnetic cover 5, and the tuning net 3 is used for adjusting timbre of sound generated by the speaker module.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A loudspeaker module is characterized by comprising a loudspeaker basin frame (1), a vibration system and a magnetic circuit system for driving the vibration system to sound, wherein the vibration system comprises a sound film (2) and a voice coil (3) connected with the sound film (2), the sound membrane (2) is fixed to the speaker frame (1), the inner diameter of the voice coil (3) is 0.25 to 0.35 times the outer diameter of the speaker frame (1), the sound membrane (2) comprises a membrane corrugated ring part (21), a voice coil joint part (22) and a ball top part (23) which are connected in sequence from the outer edge to the center, the width of the ball top (23) is 0.23 to 0.3 times the outer diameter of the horn basin frame (1), the width of the diaphragm folded ring part (21) is 0.1 to 0.15 times of the outer diameter of the horn basin frame (1), the height of the bulge of the ball top part (23) is 1 to 1.5 times of the height of the bulge of the diaphragm folded ring part (21).

2. The speaker module as claimed in claim 1, wherein the voice coil (3) is wound with a voice coil wire having a resistivity greater than copper, and the voice coil wire is a flat wire.

3. The horn module of claim 2 wherein said flat wire is aluminum flat wire.

4. A speaker module according to claim 3, wherein the vibration system further comprises a damper (4) disposed inside the diaphragm (2), the voice coil (3) is connected to the inside of the damper (4), and the damper (4) is provided with a conductive portion.

5. The speaker module as claimed in claim 4, wherein the conductive portion comprises a first pad (41), a second pad (42), a third pad (43) and a fourth pad (44) connected to the spider web (4), the first pad (41) being for electrical connection with an input terminal of the voice coil (3), the second pad (42) being for electrical connection with an output terminal of the voice coil (3), the third pad (43) being for electrical connection with an input terminal of an external power supply, the fourth pad (44) being for electrical connection with an output terminal of an external power supply, the first pad (41) and the third pad (43) being electrically connected, the second pad (42) being electrically connected to the fourth pad (44).

6. A horn module according to claim 5, wherein the centring disk (4) comprises a central hole (45), peripheral holes (46) arranged around the central hole (45) and spaced from each other, the first pad (41) and the second pad (42) being located in the central hole (45), and the third pad (43) and the fourth pad (44) being located in the peripheral holes (46).

7. A loudspeaker module according to claim 1, wherein the magnetic circuit system comprises a magnetic shield (5) arranged on a side of the loudspeaker frame (1) facing away from the sound membrane (2), a magnet (6) arranged inside the magnetic shield (5), and a magnetic shield (7) arranged outside the magnetic shield (5).

8. A horn module according to claim 7, characterized in that the magnetic shield (7) is a nickel-iron alloy magnetic shield.

9. The speaker module according to claim 1, wherein the diaphragm flange portion (21) and the dome portion (23) each protrude toward the outside of the diaphragm (2), and the voice coil attachment portion (22) has a width of 1.5 to 2.5 times the thickness of the voice coil (3).

10. The speaker module of claim 1, wherein the dome (23) is a bio-paper dome having 4-12 ribs thereon.

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