Dual-tone micro-speaker

Abstract

The utility model discloses a double tone road micro loudspeaker, including: a magnetic return assembly has a magnetic gap, a recess and a plurality of diaphragm front sound hole, each diaphragm front sound hole with the magnetic gap intercommunication, a vibration assembly has a diaphragm with a voice coil, and the voice coil is combined in the diaphragm and is located in the magnetic gap, a protective shell has a diaphragm rear sound hole, and the vibration assembly and the magnetic return assembly are stacked in the protective shell, and the diaphragm is towards the diaphragm rear sound hole, and a micro electro-mechanical sound production component has a sound production unit and a circuit unit, and the sound production unit is arranged in the recess, and the front sound hole of the sound production unit and the sound direction of each diaphragm front sound hole are same. Therefore, the micro electro-mechanical loudspeaker is integrated in the moving coil loudspeaker, and the volume is not increased.

Description

Technical Field

[0001] This utility model relates to a dual-channel miniature loudspeaker, and more particularly to a designer who integrates a microelectromechanical loudspeaker into a moving-coil loudspeaker without increasing its size. Background Technology

[0002] Traditional dynamic loudspeakers are limited in size due to structural constraints. While reducing size can improve mid-range and high-frequency performance, it also sacrifices bass performance and significantly increases production difficulty, leading to low yield and high cost. On the other hand, MEMS loudspeakers can utilize mature semiconductor processes to achieve smaller size and superior high-frequency performance. However, MEMS loudspeakers are limited by their structure, resulting in limited volume and difficulty in producing deep, full bass. Therefore, both technologies have their own advantages and disadvantages, and the choice must be made based on the specific application. Utility Model Content

[0003] The purpose of this invention is to provide a dual-channel miniature loudspeaker that integrates a microelectromechanical loudspeaker into a moving-coil loudspeaker without increasing its size.

[0004] Another objective of this new invention is to ensure that the diaphragm structure remains intact without compromising bass performance.

[0005] To achieve the above objectives, the specific technical solution of this utility model for a dual-channel miniature loudspeaker is as follows: The assembly includes: a magnetic return assembly having a magnetic gap, a recess, and a plurality of diaphragm front sound outlets, each of the diaphragm front sound outlets communicating with the magnetic gap; a vibration assembly having a diaphragm and a voice coil, the voice coil being coupled to the diaphragm and located within the magnetic gap; a protective shell having a flat plate portion and a surrounding wall portion, the surrounding wall portion being formed on the outer periphery of the flat plate portion, the flat plate portion having a diaphragm rear sound outlet, the vibration assembly and the magnetic return assembly being stacked within the protective shell, with the diaphragm facing the diaphragm rear sound outlet; and a microelectromechanical sound-generating assembly having a sound-generating unit and a circuit unit, the sound-generating unit being disposed within the recess, the sound-generating unit having a front sound outlet and a rear sound outlet, the front sound outlet having the same sound output direction as each of the diaphragm front sound outlets.

[0006] Furthermore, the magnetic return assembly has a first magnetic conductor, a magnet, and a second magnetic conductor. The central area of ​​the first magnetic conductor is recessed into the protective shell to form a recess. The first magnetic conductor thus has a recess bottom plate, a recess surrounding wall, and an annular top plate. The recess bottom plate has a vent hole. The recess surrounding wall is formed on the outer periphery of the recess bottom plate. The annular top plate is formed around the top periphery of the recess surrounding wall. Each of the diaphragm front sound outlet holes is formed around the annular top plate. The magnet and the second magnetic conductor are stacked sequentially on the annular top plate. The gap between the recess surrounding wall and the magnet / second magnetic conductor is formed as the magnetic gap.

[0007] Furthermore, the circuit unit has an inner annular circuit board, an outer annular circuit board, and a connecting circuit board. The connecting circuit board connects the inner annular circuit board and the outer annular circuit board. The inner annular circuit board is attached to the sound-generating unit and disposed in the recess. The connecting circuit board is bent along the inner side of the recess wall, the top side of the annular top plate, and the outer side of the wall portion, so that the outer annular circuit board is attached to the outer surface of the flat plate portion.

[0008] Furthermore, the outer side of the enclosure portion has a notch relative to the connecting circuit board, and the enclosure portion has a notch relative to the lead wire of the voice coil. The flat plate portion has a flange formed outwards around the periphery of the rear sound outlet of the diaphragm. The rear sound outlet of the sound-producing unit faces the inner hole of the annular inner end circuit board and the vent hole of the recessed bottom plate; the diameter of the vent hole and the inner hole is larger than the diameter of the rear sound outlet. A gasket is provided on the outer periphery of the diaphragm. The outer periphery of the flat plate portion of the protective shell has a first raised step formed towards the diaphragm, and the outer periphery of the second magnetic conductor has a second raised step formed towards the diaphragm. The diameter of the rear sound outlet of the sound-producing unit is larger than the diameter of the front sound outlet. The diaphragm and the sound-producing unit are in phase in their direction of operation. Attached Figure Description

[0009] Figure 1 This is an exploded view of the structure of this utility model; Figure 2 This is an exploded view of the structure of the vibration component of this utility model assembled inside the protective shell; Figure 3 This is an exploded view of the structure of the vibration component and magnetic return component of this utility model, assembled inside the protective shell. Figure 4 This is a structural diagram of the vibration component, magnetic return component, and sound generating unit of this utility model assembled inside a protective shell. Figure 5 This is a first-view structural assembly diagram of the present invention; Figure 6 This is a structural assembly diagram from a second perspective of the present invention; Figure 7 This is a cross-sectional view of the structure of this utility model; Explanation of markings in the diagram: 10: Magnetic return assembly; 11: First magnetic conductor; 111: Concave bottom plate; 112: A recessed wall; 113: Annular top plate; 114: Vent hole; 115: Front sound outlet of the diaphragm; 12: Magnet; 13: Second magnetic conductor; 131: Second convex step; 14: Indentation; 15: Magnetic gap; 20: Vibration component; 21: Diaphragm; 211: Washer; 22: Voice coil; 221: Lead wire; 30: Protective case; 31: Flat plate section; 311: Flange; 312: First convex step; 32: The perimeter wall section; 321: Gap; 322: Missing slot; 33: Sound outlet at the rear of the diaphragm; 40: Microelectromechanical sound-generating components; 41: Sound generating unit; 411: Front sound hole; 412: Rear sound hole; 42: Circuit unit; 421: Annular inner circuit board; 422: Annular outer circuit board; 423: Connecting circuit board; 424: Inner hole of the ring. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0011] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0012] The following is a reference to the appendix. Figure 1 To be continued Figure 7 This invention describes a dual-channel miniature loudspeaker.

[0013] This invention includes: a magnetic return component 10, a vibration component 20, a protective shell 30, and a microelectromechanical sound-generating component 40.

[0014] The magnetic return assembly 10 has a first magnetic conductive element 11, a magnet 12, and a second magnetic conductive element 13. The central area of ​​the first magnetic conductive element 11 is recessed into the protective shell 30 to form a recess 14. The first magnetic conductive element 11 thus has a recess bottom plate 111, a recess surrounding wall 112, and an annular top plate 113. The recess bottom plate 111 has a vent 114, and the recess surrounding wall 112 is formed on the outside of the recess bottom plate 111. The annular top plate 113 is formed around the top periphery of the recessed wall 112. The annular top plate 113 has a plurality of diaphragm front sound outlet holes 115. The magnet 12 and the second magnetic conductor 13 are stacked sequentially on the annular top plate 113. The gap between the recessed wall 112 and the magnet 12 / the second magnetic conductor 13 is formed into a magnetic gap 15. Each diaphragm front sound outlet hole 115 is connected to the magnetic gap 15.

[0015] The vibrating assembly 20 has a diaphragm 21 and a voice coil 22, the voice coil 22 being coupled to the diaphragm 21 and located within the magnetic gap 15.

[0016] The protective shell 30 has a flat plate portion 31 and a wall portion 32. The wall portion 32 is formed on the outer periphery of the flat plate portion 31. The flat plate portion 31 has a diaphragm rear sound outlet 33. The vibrating assembly 20 and the magnetic return assembly 10 are stacked inside the protective shell 30, with the diaphragm 21 facing the diaphragm rear sound outlet 33. The wall portion 32 has a notch 321 opposite to the lead wire 221 of the voice coil 22. The flat plate portion 31 has a flange 311 formed outward from the periphery of the diaphragm rear sound outlet 33.

[0017] The microelectromechanical sound-generating assembly 40 includes a sound-generating unit 41 and a circuit unit 42. The sound-generating unit 41 is disposed within the recess 14 and has a front sound-generating port 411 and a rear sound-generating port 412. The diameter of the rear sound-generating port 412 is larger than the diameter of the front sound-generating port 411. The sound emission direction of the front sound-emitting port 411 is the same as that of the front sound-emitting port 115 of each diaphragm. The circuit unit 42 includes an annular inner circuit board 421, an annular outer circuit board 422, and a connecting circuit board 423. The connecting circuit board 423 connects the annular inner circuit board 421 and the annular outer circuit board 422. The inner annular circuit board 421 of the circuit board 422 is attached to the sound-generating unit 41 and disposed in the recess 14. The connecting circuit board 423 is bent along the inner side of the recess wall 112, the top side of the annular top plate 113 and the outer side of the wall portion 32, so that the outer annular circuit board 422 is attached to the outer surface of the flat plate portion 31. The lead 221 of the voice coil 22 is passed through the notch 321 and soldered to the outer annular circuit board 422. The outer side of the wall portion 32 has a notch 322 opposite to the connecting circuit board 423, so that the connecting circuit board 423 is hidden in the notch 322.

[0018] The annular inner circuit board 421 is attached to the outer periphery of the rear sound hole 412 of the sound-generating unit 41. The rear sound hole 412 faces the inner hole 424 of the annular inner circuit board 421 and the vent 114 of the recessed bottom plate 111. The diameter of the vent 114 and the inner hole 424 is larger than the diameter of the rear sound hole 412. Therefore, since the space between the rear sound hole 412 of the sound-generating unit 41 and the diaphragm 21 is connected, the sound-generating unit 41 can exhaust the gas in its rear sound field into the structure of the moving-coil speaker when it is in operation. However, the microelectromechanical sound-generating unit 41 mainly produces high frequencies, and the actual exhaust volume of the rear sound field is small. When the gas enters the larger moving-coil speaker structure, due to the larger volume space, the exhaust gas will not interfere with the normal operation of the diaphragm 21, and the normal sound production of the sound-generating unit 41 can also be ensured.

[0019] The diaphragm 21 has a washer 211 on its outer periphery. The outer periphery of the flat plate portion 31 is formed with a first convex step 312 facing the diaphragm 21. The outer periphery of the second magnetic conductor 13 is formed with a second convex step 131 facing the diaphragm 21. The washer 211, the first convex step 312 and the second convex step 131 are used to ensure that the diaphragm 21 will not be interfered with and can operate normally.

[0020] In the traditional dynamic loudspeaker structure, the sound-generating unit 41 is located at the bottom of the dynamic loudspeaker. The operation of the sound-generating unit 41 and the diaphragm 21 will have a phase difference. Therefore, when an electronic signal is input from the sound source, the diaphragm 21 and the sound-generating unit 41 can be made to operate in phase through signal processing or electrical connection settings, thereby realizing high and low frequency dual-path. Since the dynamic loudspeaker has a large bass exhaust volume, the gas can be quickly discharged through the sound outlet 33 behind the diaphragm to avoid interfering with the operation of the diaphragm 21.

[0021] Based on this configuration, the present invention uses a moving-coil loudspeaker as the main body and then assembles a microelectromechanical (MEMS) loudspeaker inside. Therefore, the vibration component 20 and the magnetic return component 10 are first stacked sequentially inside the protective shell 30, and the magnetic return component 10 is recessed inward to form the recess 14. Then, the inner annular circuit board 421 of the MEMS sound-generating component 40 is attached to the sound-generating unit 41 and hidden in the recess 14. Next, the connecting circuit board 423 is bent and shaped so that the outer annular circuit board 422 is attached to the outer surface of the flat plate 31. Thus, the present invention combines a moving-coil loudspeaker that can provide high-quality bass and a MEMS loudspeaker that can provide high-quality treble to form a dual-path structure, providing a more accurate and wider sound range, solving the problem that traditional single loudspeakers cannot simultaneously handle high and low frequencies, and has the effect of integrating a MEMS loudspeaker into a moving-coil loudspeaker without increasing the size.

[0022] Furthermore, since the sound production principles of dynamic loudspeakers and microelectromechanical loudspeakers are different, when integrating a microelectromechanical loudspeaker into a dynamic loudspeaker, it is necessary to configure additional electronic components to drive the microelectromechanical loudspeaker. Therefore, the annular outer circuit board 422 is equipped with active and passive components to drive the sound-producing unit 41, and integrates the circuit layout for driving the dynamic loudspeaker and the microelectromechanical loudspeaker. This allows the signal to be divided and driven by different voltages after a single audio source signal is input, enabling both to produce sound synchronously and achieving dual-channel operation.

[0023] Furthermore, this novel design features a recess 14 formed inwardly within the protective shell 30 by the central region of the first magnetic conductor 11. The recess 14 accommodates the annular inner circuit board 421 and the sound-generating unit 41. After the annular inner circuit board 421 and the sound-generating unit 41 are assembled, they do not protrude from the first magnetic conductor 11, thus increasing the overall height. In this way, the overall speaker height is not increased, and the structural integrity of the diaphragm 21 is maintained, giving it the largest possible bass emitting area to provide a sufficiently large bass performance. This design ensures that the diaphragm structure remains intact without compromising bass performance.

[0024] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A dual path microspeaker, comprising: Including: A magnetic return assembly has a magnetic gap, a recess, and a plurality of diaphragm front sound holes, each of the diaphragm front sound holes communicating with the magnetic gap; A vibrating assembly having a diaphragm and a voice coil, the voice coil being coupled to the diaphragm and located within the magnetic gap; A protective shell has a flat plate portion and a surrounding wall portion formed on the outer periphery of the flat plate portion. The flat plate portion has a diaphragm rear sound outlet. The vibrating assembly and the magnetic return assembly are stacked inside the protective shell, with the diaphragm facing the diaphragm rear sound outlet. A microelectromechanical sound-generating component has a sound-generating unit and a circuit unit. The sound-generating unit is disposed in the recess and has a front sound-generating hole and a rear sound-generating hole. The sound-generating hole and the front sound-emitting hole of each diaphragm have the same sound emission direction.

2. The dual-tone microspeaker of claim 1, wherein, in, The magnetic return assembly has a first magnetic conductor, a magnet, and a second magnetic conductor. The central area of ​​the first magnetic conductor is recessed into the protective shell to form a recess. The first magnetic conductor thus has a recess bottom plate, a recess surrounding wall, and an annular top plate. The recess bottom plate has a vent hole. The recess surrounding wall is formed on the outer periphery of the recess bottom plate. The annular top plate is formed around the top periphery of the recess surrounding wall. Each of the diaphragm front sound outlet holes is formed around the annular top plate. The magnet and the second magnetic conductor are stacked sequentially on the annular top plate. The gap between the recess surrounding wall and the magnet / second magnetic conductor is formed as the magnetic gap.

3. The dual-tone microspeaker of claim 2, wherein, in, The circuit unit has an inner ring circuit board, an outer ring circuit board and a connecting circuit board. The connecting circuit board connects the inner ring circuit board and the outer ring circuit board. The inner ring circuit board is attached to the sound-generating unit and disposed in the recess. The connecting circuit board is bent along the inner side of the recess wall, the top side of the annular top plate and the outer side of the wall portion, so that the outer ring circuit board is attached to the outer surface of the flat plate portion.

4. The dual-tone microspeaker of claim 3, wherein, in, The outer side of the enclosure has a notch relative to the connecting circuit board, and the enclosure has a gap relative to the lead wire of the voice coil.

5. The dual-tone microspeaker of claim 3, wherein, in, The flat plate has a flange formed outward around the sound outlet hole of the diaphragm.

6. The dual-tone microspeaker of claim 3, wherein, in, The rear sound-emitting hole of the sound-emitting unit faces the inner hole of the annular inner end circuit board and the vent hole of the recessed bottom plate. The diameter of the vent hole and the inner hole of the annular circuit board is larger than the diameter of the rear sound-emitting hole.

7. The dual-tone microspeaker of claim 1, wherein, in, The diameter of the rear sound hole of the sound-emitting unit is larger than the diameter of the front sound hole.

8. The dual-tone microspeaker of claim 2, wherein, in, The outer periphery of the diaphragm has a washer, the outer periphery of the flat plate portion of the protective shell is formed with a first convex step facing the diaphragm, and the outer periphery of the second magnetic conductor is formed with a second convex step facing the diaphragm.

9. The dual-tone microspeaker of any of claims 1-8, wherein, in, The diaphragm is in phase with the direction of motion of the sound-generating unit.

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