Miniature speaker unit with better waterproof effect

Abstract

The present invention provides a miniature speaker unit with better waterproof effect, comprising an outer shell having a containing space and at least one sound hole and a miniature speaker installed in the containing space. The miniature speaker comprises a diaphragm assembly and a magnetic assembly mutually assembled with the diaphragm assembly, the diaphragm assembly is used to separate the containing space into a front chamber and a rear chamber which are not connected to each other, and the front chamber is connected to the sound hole, so as to prevent external water vapor from entering the rear chamber and the miniature speaker through the diaphragm assembly, thereby improving the waterproof effect of the whole miniature speaker unit.

Description

Technical Field

[0001] The present invention relates to a miniature speaker unit, and in particular to a miniature speaker unit which can be used to install a miniature loudspeaker and has good waterproof effect. Background Art

[0002] Micro-single speakers are used in electronic products and are installed inside electronic products to release sound through electroacoustic conversion. With the requirements of electronic products for waterproof effect, because micro-single speakers need to diffuse sound outward through sound outlets when working, in addition to the electronic products themselves having good waterproof effect, micro-single speakers also need to have good waterproof effect to prevent external moisture or water vapor from accidentally entering the electronic products through micro-single speakers, thereby causing damage to the electronic products.

[0003] Traditional micro-single speakers are mostly made by installing a micro-speaker inside a shell, and a sound outlet is formed on the shell. When the micro-speaker is converted by electroacoustics, the sound is diffused outward from the sound outlet. In order to meet the waterproof requirements, most of the existing micro-speakers (such as US Patent Publication No. 10,129,652 or 9,363,594, etc.) use silicone injection to connect the diaphragm to a cavity at the periphery of the internal diaphragm, and form a hanging edge between the diaphragm and the cavity, so that the diaphragm can generate amplitude in the center of the cavity through the hanging edge, so that the amplitude drives the air to produce sound, and the hanging edge can also effectively prevent moisture or water vapor from entering the interior of the micro-speaker.

[0004] When the micro speaker is installed inside the shell, a waterproof ring is often installed between the micro speaker and the shell to prevent moisture or water vapor from passing through the gap between the micro speaker and the shell, thereby achieving waterproof requirements.

[0005] Since such a miniature speaker unit needs a waterproof ring to block moisture or water vapor during installation, external factors such as careless assembly or damage and deformation of the waterproof ring during the installation process will destroy the waterproof effect of the miniature speaker unit and shorten the life of the miniature speaker unit.

[0006] How to provide a miniature speaker unit which can also have a good waterproof effect after the miniature speaker is installed is the problem to be solved by the present invention. Summary of the invention

[0007] The main purpose of the present invention is to provide a miniature speaker unit, in particular, a miniature speaker unit which can be used to install a miniature speaker and also has a good waterproof effect.

[0008] In order to achieve the above-mentioned purpose, the present invention provides a miniature speaker unit with better waterproof effect, which at least includes an outer shell and a miniature speaker. The outer shell has a containing space inside, and at least one sound hole interconnected with the containing space is formed on one side of the outer shell. The miniature speaker is installed in the containing space, and the containing space is divided into a front chamber connected with the sound hole and a rear chamber spaced apart from the front chamber. The miniature speaker is composed of a diaphragm assembly for dividing the containing space into the front chamber and the rear chamber, and a magnetic assembly located in the closed chamber and assembled with the diaphragm assembly. The diaphragm assembly is installed at one end of the magnetic assembly, and the diaphragm assembly includes a diaphragm exposed in the front chamber, a cavity arranged around the diaphragm, and a cavity formed between the diaphragm and the cavity. and an elastic connecting piece between the outer shell, the elastic connecting piece having an elastic supporting portion located between the diaphragm and the cavity, an elastic fitting portion located between the cavity and the first shell, and at least one connecting portion used to connect the elastic supporting portion and the elastic fitting portion, and the elastic fitting portion and the connecting portion are respectively tightly fitted with the outer shell, so that the accommodating space is separated into the front chamber and the rear chamber by the connecting portion and the elastic fitting portion, thereby forming a state of being disconnected from each other between the front chamber and the rear chamber.

[0009] Optionally, the elastic connecting piece on the diaphragm assembly is made of a silicone material and is integrally formed on the diaphragm and the cavity by injection molding.

[0010] Optionally, the connecting portion of the elastic connecting member is arranged above the cavity, and a plurality of notches are formed on the connecting portion, so that part of the cavity is exposed to the front chamber through the notches.

[0011] Optionally, the connecting portion is protruding on a surface of the cavity facing the front chamber.

[0012] Optionally, the elastic engaging portion and the connecting portion form an angle setting, and the outer diameter of the elastic engaging portion is greater than the outer diameter of the cavity.

[0013] Optionally, the diaphragm assembly further includes a voice coil connected to the diaphragm and extending toward the magnetic assembly.

[0014] Optionally, the magnetic assembly includes a magnet located inside the voice coil, a U-shaped iron for supporting the magnet, and a base surrounding the outside of the U-shaped iron, and the voice coil is located between the magnet and the U-shaped iron, so that after the voice coil is magnetized, it can drive the diaphragm to generate amplitude in the front chamber.

[0015] Optionally, the base and the cavity are interconnected.

[0016] Optionally, the outer shell is composed of a first shell and a second shell assembled with the first shell to form the accommodating space, and the sound hole is located on one side of the first shell, and the front chamber is formed after the diaphragm assembly is assembled inside the first shell, and the magnetic assembly is located in the rear chamber.

[0017] Optionally, the diameter of the front chamber is smaller than the diameter of the rear chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a first cross-sectional schematic diagram of the miniature speaker unit of the present invention.

[0019] Figure 2 It is a second cross-sectional schematic diagram of the miniature speaker unit of the present invention.

[0020] Figure 3 FIG. 4 is a three-dimensional schematic diagram of the micro speaker of the present invention.

[0021] Figure 4 It is a schematic diagram of the exploded view of the diaphragm assembly of the present invention.

[0022] Figure 5 FIG. 4 is a top view of the micro speaker of the present invention.

[0023] Figure 6 FIG. 4 is a first cross-sectional schematic diagram of the micro-speaker of the present invention.

[0024] Figure 7 for Figure 6 A partially enlarged schematic diagram of .

[0025] Figure 8 FIG. 4 is a second cross-sectional schematic diagram of the micro-speaker of the present invention.

[0026] Fig. 9 for Figure 8 A partially enlarged schematic diagram of .

[0027] Explanation of symbols:

[0028] 10 Micro speaker unit

[0029] 20 Outer shell

[0030] 201 First Shell

[0031] 202 Second Shell

[0032] 21 Storage Space

[0033] 211 Front Chamber

[0034] 212 Rear Chamber

[0035] 22 sound holes

[0036] 23. Segment difference

[0037] 30 Micro Speakers

[0038] 40 Diaphragm assembly

[0039] 41 Diaphragm

[0040] 42 Voice Coil

[0041] 43 Cavity

[0042] 44 Elastic connector

[0043] 441 elastic support

[0044] 442 elastic fitting part

[0045] 443 Connection

[0046] 444 Gap

[0047] 50 Magnetic Components

[0048] 51 Magnet

[0049] 52 U-shaped iron

[0050] 53 Base DETAILED DESCRIPTION

[0051] The detailed description and technical contents of the present invention are now described as follows in conjunction with the accompanying drawings:

[0052] like Figures 1 to 2 As shown, the present invention first provides a miniature speaker unit with better waterproof effect. The miniature speaker unit 10 has an outer shell 20 and a miniature speaker 30 installed inside the outer shell 20.

[0053] The outer shell 20 has an accommodating space 21 inside, and a side wall of the outer shell 20 has at least one sound hole 22 that is interconnected with the accommodating space 21. In this embodiment, the outer shell 20 is further composed of a first shell 201 and a second shell 202, and the sound hole 22 is located on a side wall of the first shell 201. The first shell 201 and the second shell 202 are assembled to form the accommodating space 21.

[0054] Combination Figures 1 to 9As shown, the micro speaker 30 is installed in the accommodating space 21 to divide the accommodating space 21 into a front chamber 211 communicating with the sound hole 22 and a rear chamber 212 separated from the front chamber 211, so that the front chamber 211 and the rear chamber 212 are not connected to each other, and the diameter of the front chamber 211 is smaller than the diameter of the rear chamber 212, so that a difference surface 23 is formed on the inner wall surface of the outer shell 20. The micro speaker 30 includes a diaphragm assembly 40 and a magnetic assembly 50 assembled with the diaphragm assembly 40.

[0055] In this embodiment, the diaphragm assembly 40 is installed inside the first housing 201, so that the front chamber 211 and the rear chamber 212 are not connected to each other through the diaphragm assembly 40. The diaphragm assembly 40 is composed of a diaphragm 41, a voice coil 42, a cavity 43 and an elastic connecting member 44. The diaphragm 41 is a flat plate, and the cavity 43 surrounds the periphery of the diaphragm 41 and is spaced from the diaphragm 41. The voice coil 42 is connected to the diaphragm 41 and extends toward the rear chamber 212. The elastic connector 44 is formed between the cavity 43 and the diaphragm 41, and extends to the outside of the cavity 43. The elastic connector 44 includes an elastic support portion 441, an elastic fitting portion 442, and a connecting portion 443. The elastic support portion 441 is formed between the diaphragm 41 and the cavity 43, and is used to connect the diaphragm 41 and the cavity 43, so that the diaphragm 41 can have a reciprocating swing amplitude effect in the cavity 43 through the elastic support portion 441. The elastic fitting portion 442 is located between the cavity 43 and the outer shell 20. The connecting portion 443 is located above the cavity 43, and is used to connect the elastic support portion 441 and the elastic fitting portion 442. The connecting portion 443 is convexly arranged on a surface of the cavity 43 facing the front chamber 211, and is in contact with the step surface 23.

[0056] The magnetic assembly 50 is arranged below the diaphragm assembly 40 and is located in the rear chamber 212. The magnetic assembly 50 is composed of a magnet 51, a U-shaped iron 52 and a base 53. The magnet 51 is arranged inside the voice coil 42 so that the voice coil 42 surrounds the magnet 51. The U-shaped iron 52 is used to carry the magnet 51, and the U-shaped iron 52 surrounds the voice coil 42 so that the voice coil 42 extends between the magnet 51 and the U-shaped iron 52. The base 53 is covered on the outside of the U-shaped iron 52 and is connected to the cavity 43 to form the micro speaker 30. When the voice coil 42 is excited, it will generate a reciprocating motion between the magnet 51 and the U-shaped iron 52 and along the extension direction of the magnet 51. At this time, the voice coil 42 will drive the diaphragm 41 to generate the amplitude effect in the center of the cavity 43, and the gas in the front chamber 211 will be driven by the diaphragm 41 to produce sound, which is then transmitted outward from the sound hole 22.

[0057] In this embodiment, when the diaphragm assembly 40 is formed, the diaphragm 41 and the cavity 43 are first formed separately, and then the diaphragm 41 and the cavity 43 are simultaneously placed in a molding space of a mold (not shown in the figure), and then a liquid silicone material is injected into the molding space, and finally the silicone material is solidified and formed, so that the elastic connector 44 can be formed on the diaphragm 41 and the cavity 43, and finally the voice coil 42 is adhered to the diaphragm 41 to form the diaphragm assembly 40. The elastic connector 44 formed by the silicone material has good adhesion and good elasticity. Therefore, when the diaphragm assembly 40 is installed in the accommodating space 21, the connection part 443 and the elastic fitting part 442 formed outside the cavity 43 are closely fitted with the inner wall surface of the outer shell 20 respectively.

[0058] In order to make the elastic fitting part 442 and the inner wall surface of the outer shell 20 produce a good and tight fit effect, in this embodiment, the outer diameter of the elastic fitting part 442 is slightly larger than the diameter of the rear chamber 212, so that when the diaphragm assembly 40 is installed, the elastic fitting part 442 and the inner wall surface of the outer shell 20 can produce a good and tight fit effect. At the same time, the connecting part 443 can also be tightly fitted with the inner wall surface of the outer shell 20, and then the front chamber 211 and the rear chamber 212 are formed into a state of being disconnected from each other through the diaphragm assembly 40. In this way, when water vapor from the outside of the outer shell 20 enters the front chamber 211 through the sound hole 22, the water vapor can be blocked by the diaphragm assembly 40 from entering the rear chamber 212, so that the rear chamber 212 can maintain a good airtight effect. The excess moisture in the front chamber 211 can also be discharged through the sound hole 22, which can not only improve the waterproof effect of the micro speaker unit 10, but also effectively increase the life of the micro speaker unit 10. At the same time, the front chamber 211 and the rear chamber 212 are not connected to each other, so that when the micro speaker unit 10 generates sound, the phenomenon of noise generated by the micro speaker unit 10 can be reduced, thereby improving the sound quality of the micro speaker unit 10.

[0059] Furthermore, when the connection portion 443 is formed, since the connection portion 443 is arranged outside the cavity 43, in order to reduce the overall weight of the micro speaker unit 10, at least one notch 444 is formed on the connection portion 443 to expose part of the surface of the cavity 43, thereby effectively reducing the weight. The connecting portion 443 and the elastic fitting portion 442 are arranged at an angle. In the present embodiment, the connecting portion 443 and the elastic fitting portion 442 are arranged vertically, and a plurality of notches 444 are arranged on the connecting portion 443, so that the connecting portion 443 and the elastic fitting portion 442 respectively correspond to the inner wall surface and the step difference surface 23 which are perpendicular to each other inside the outer shell 20 and fit tightly with each other. Since the diameter of the front chamber 211 is smaller than the diameter of the rear chamber 212, the connecting portion 443 and the elastic fitting portion 442 can respectively achieve an effective and tight fit with the step difference surface 23 and the inner wall surface of the outer shell 20.

[0060] As can be seen from the above, in addition to achieving a waterproof effect inside the micro speaker 30 through the elastic support portion 441, the present invention can also use the elastic interlocking portion 442 and the connecting portion 443 to separate the front chamber 211 and the rear chamber 212, and can separate the front chamber 211 and the rear chamber 212 into two states that are not connected to each other, thereby preventing water vapor from entering the micro speaker 30 and the rear chamber 212 respectively, thereby achieving an effective waterproof effect and improving the overall waterproof effect of the micro speaker unit 10.

[0061] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the protection scope of the present application. Any equivalent modifications or changes made by those skilled in the art based on the content of the present application should be included in the protection scope of the present application.

Claims

1. A miniature speaker unit with better waterproof effect, comprising: An outer shell has an accommodating space inside, and at least one sound hole communicating with the accommodating space is formed on one side of the outer shell; A miniature loudspeaker is installed in the accommodating space, and the accommodating space is divided into a front chamber connected to the sound hole and a rear chamber spaced apart from the front chamber. The miniature loudspeaker is composed of a diaphragm assembly for dividing the accommodating space into the front chamber and the rear chamber, and a magnetic assembly located in the rear chamber and assembled with the diaphragm assembly. The diaphragm assembly is installed at one end of the magnetic assembly, and the diaphragm assembly includes a diaphragm exposed in the front chamber, a cavity arranged around the diaphragm, and a cavity formed between the diaphragm, the An elastic connector between the cavity and the outer shell, the elastic connector has an elastic supporting portion located between the diaphragm and the cavity, an elastic fitting portion located between the cavity and the first shell, and at least one connecting portion used to connect the elastic supporting portion and the elastic fitting portion, and the elastic fitting portion and the connecting portion are respectively tightly fitted with the outer shell, so that the accommodating space is separated into the front chamber and the rear chamber by the connecting portion and the elastic fitting portion, thereby forming a non-connected state between the front chamber and the rear chamber.

2. The miniature speaker unit with better waterproof effect according to claim 1, wherein: The elastic connecting piece on the diaphragm assembly is made of a silicone material and is integrally formed on the diaphragm and the cavity by injection molding.

3. The miniature speaker unit with better waterproof effect according to claim 2, wherein: The connecting portion of the elastic connecting piece is arranged on the upper part of the cavity, and a plurality of notches are formed on the connecting portion, so that a part of the cavity is exposed to the front chamber through the notches.

4. The miniature speaker unit with better waterproof effect according to claim 3, wherein: The connecting portion is convexly arranged on a surface of the cavity facing the front chamber.

5. The miniature speaker unit with better waterproof effect according to claim 3, wherein: The elastic embedding portion and the connecting portion form an angle, and the outer diameter of the elastic embedding portion is greater than the outer diameter of the cavity.

6. The miniature speaker unit with better waterproof effect according to claim 2, wherein: The diaphragm assembly also includes a voice coil connected to the diaphragm and extending toward the magnetic assembly.

7. The miniature speaker unit with better waterproof effect according to claim 6, wherein: The magnetic component includes a magnet located inside the voice coil, a U-shaped iron for supporting the magnet, and a base surrounding the outside of the U-shaped iron. The voice coil is located between the magnet and the U-shaped iron, so that after the voice coil is excited, it can drive the diaphragm to generate amplitude in the front chamber.

8. The miniature speaker unit with better waterproof effect according to claim 7, wherein: The base and the cavity are connected to each other.

9. The miniature speaker unit with better waterproof effect according to claim 1, wherein: The outer shell is composed of a first shell and a second shell assembled with the first shell to form the accommodating space, and the sound hole is located on one side of the first shell, and the front chamber is formed after the diaphragm assembly is assembled inside the first shell, and the magnetic assembly is located in the rear chamber.

10. The miniature speaker unit with better waterproof effect according to claim 9, wherein: The diameter of the front chamber is smaller than the diameter of the rear chamber.

Images