Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a metal frame, a bass vibration assembly, a bass magnetic circuit assembly and a treble unit, and is characterized in that the outer side wall of the metal frame is provided with a cavity; the bass vibration assembly comprises a bass diaphragm assembly and a bass voice coil, and the bass diaphragm assembly is connected with the top of the basin stand and the bass voice coil; the bass magnetic circuit assembly comprises a yoke and a bass center magnetic structure arranged on the yoke, the yoke is connected with the metal frame, and the bass center magnetic structure is arranged corresponding to the hollow area of the bass voice coil; the high-pitch unit comprises a high-pitch vibrating diaphragm assembly, a high-pitch voice coil and a high-pitch center magnetic structure, the high-pitch vibrating diaphragm assembly is arranged at the opening of the cavity and seals the cavity, the high-pitch voice coil is connected with the high-pitch vibrating diaphragm assembly, and the high-pitch center magnetic structure is arranged in the cavity and corresponds to the hollow area of the high-pitch voice coil. The miniature loudspeaker is novel in structure and small in size, and is provided with the high pitch unit and the low pitch unit at the same time, and the sound production surface of the high pitch unit and the sound production surface of the low pitch unit are located on the adjacent sides of the miniature loudspeaker.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic transducers, and particularly relates to a micro loudspeaker. Background Art

[0002] Micro loudspeakers are widely used in portable electronic devices such as mobile phones, laptop computers, and hearing aids. With the rapid development of these portable electronic devices, people's requirements for the micro electroacoustic devices applied therein are also getting higher and higher. To improve the performance of micro loudspeakers, a micro loudspeaker with both a high-frequency unit and a low-frequency unit has been developed in the industry. However, such a micro loudspeaker with both a high-frequency unit and a low-frequency unit can often only emit sound from one side or the opposite side, and cannot adapt to the application scenarios where high and low frequencies need to emit sound from adjacent sides of the micro loudspeaker. Moreover, the existing micro loudspeakers with both a high-frequency unit and a low-frequency unit also have the problem of relatively large volume. Summary of the Utility Model

[0003] The technical problem solved by the utility model is to provide a micro loudspeaker with both a high-frequency unit and a low-frequency unit, and the micro loudspeaker can realize sound emission from adjacent sides.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a micro loudspeaker, comprising:

[0005] A metal chassis, on the outer side wall of which a chamber is provided;

[0006] A low-frequency vibration assembly, which includes a low-frequency diaphragm assembly and a low-frequency voice coil, and the low-frequency diaphragm assembly connects the top of the chassis and the low-frequency voice coil;

[0007] A low-frequency magnetic circuit assembly, which includes a yoke and a low-frequency central magnetic structure arranged on the yoke, the yoke connects the metal chassis, and the low-frequency central magnetic structure is arranged corresponding to the hollow area of the low-frequency voice coil;

[0008] A high-frequency unit, which includes a high-frequency diaphragm assembly, a high-frequency voice coil, and a high-frequency central magnetic structure. The high-frequency diaphragm assembly is arranged at the opening of the chamber and closes the chamber. The high-frequency voice coil connects the high-frequency diaphragm assembly, and the high-frequency central magnetic structure is arranged in the chamber and corresponds to the hollow area of the high-frequency voice coil.

[0009] In one embodiment, a positioning hole for positioning the high-frequency central magnetic structure is provided on the bottom wall of the chamber.

[0010] In one embodiment, the positioning hole is a through hole, and the end face of the high-frequency center magnetic structure away from the high-frequency diaphragm assembly is flush with the inner wall of the metal chassis, or the end face of the high-frequency center magnetic structure away from the high-frequency diaphragm assembly protrudes relative to the inner wall of the metal chassis.

[0011] In one embodiment, the bottom wall of the cavity is further provided with a rear cavity adjustment hole communicating with the inner wall of the metal chassis. The rear cavity adjustment hole is a through hole structure. The high-frequency unit further includes an adjustment block for blocking the rear cavity adjustment hole, and the adjustment block is slidably arranged along the rear cavity adjustment hole.

[0012] In one embodiment, in the high-frequency unit, the number of the rear cavity adjustment holes is multiple.

[0013] In one embodiment, the rear cavity adjustment holes are respectively provided at both ends of the high-frequency center magnetic structure.

[0014] In one embodiment, a plurality of the cavities are provided on the metal chassis, and each cavity is provided with the high-frequency unit.

[0015] In one embodiment, the cavities are respectively provided on opposite sides of the metal chassis, and the cavities located on opposite sides of the metal chassis are symmetrically arranged.

[0016] In one embodiment, the low-frequency center magnetic structure includes a low-frequency center magnet and a low-frequency center washer, and the low-frequency center magnet connects the low-frequency center washer and the yoke.

[0017] In one embodiment, the high-frequency center magnetic structure includes a high-frequency center magnet and a high-frequency center washer. The high-frequency center magnet connects the high-frequency center washer and the metal chassis, and the high-frequency center washer is located at one end of the high-frequency center magnet away from the low-frequency center magnetic structure.

[0018] The beneficial effects of the present utility model are as follows: The structure of the present micro speaker is novel. It has both a high-frequency unit and a low-frequency unit at the same time, and the sound-emitting surfaces of the high-frequency unit and the low-frequency unit are on adjacent sides of the micro speaker, enabling the micro speaker to effectively adapt to application scenarios that require sound emission on adjacent sides. Moreover, the present sound-emitting unit forms a magnetic circuit by using a metal chassis, which not only reduces the number of components required for assembling the micro speaker, but also enables the overall volume size of the micro speaker to be made smaller, meeting the development trend of the thin and light of electronic devices. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0020] Figure 1 Structural schematic diagram of the overall structure of the micro speaker according to Embodiment 1 of the present invention;

[0021] Figure 2 Cross-section of the micro speaker according to Embodiment 1 of the present invention Figure 1 ;

[0022] Figure 3 Cross-section of the micro speaker according to Embodiment 1 of the present invention Figure 2 。

[0023] Explanation of the reference numerals in the drawings:

[0024] 1. Metal chassis; 11. Chamber; 12. Positioning hole; 13. Rear chamber adjustment hole;

[0025] 2. Bass vibration assembly; 21. Bass diaphragm assembly; 22. Bass voice coil;

[0026] 3. Bass magnetic circuit assembly; 31. Yoke; 32. Bass central magnetic structure;

[0027] 4. High - frequency unit; 41. High - frequency diaphragm assembly; 42. High - frequency voice coil; 43. High - frequency central magnetic structure; 44. Adjusting block. Detailed implementation manners

[0028] The realization of the purpose, functional features and advantages of the present invention will be further described in conjunction with the embodiments with reference to the drawings.

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if the descriptions such as "first", "second", etc. are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature.

[0032] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes the solution, or the solution, or the solution that satisfies both simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] In this application, unless otherwise clearly defined and limited, the terms such as "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] Embodiment 1

[0035] Please refer to Figures 1 to 3 , Embodiment 1 of the present utility model is: a micro speaker, including a metal chassis 1, a bass vibration assembly 2, a bass magnetic circuit assembly 3 and a tweeter unit 4. A chamber 11 is provided on the outer side wall of the metal chassis 1; the bass vibration assembly 2 includes a bass diaphragm assembly 21 and a bass voice coil 22. The bass diaphragm assembly 21 connects the top of the chassis to the bass voice coil 22. Specifically, the bass diaphragm assembly 21 includes a bass diaphragm and a bass middle sticker provided on the bass diaphragm. The outer edge of the bass diaphragm is connected to the top of the metal chassis 1; the bass magnetic circuit assembly 3 includes a yoke 31 and a bass center magnetic structure 32 provided on the yoke 31. The yoke 31 is connected to the metal chassis 1. The bass center magnetic structure 32 is arranged corresponding to the hollow area of the bass voice coil 22. Specifically, the bottom of the metal chassis 1 is connected to the yoke 31. The bass center magnetic structure 32 includes a bass center magnet and a bass center washer. The bass center magnet connects the bass center washer and the yoke 31. The bass center washer is located on the side of the bass center magnet away from the yoke 31;

[0036] The tweeter unit 4 includes a tweeter diaphragm assembly 41, a tweeter voice coil 42, and a tweeter central magnetic structure 43. The tweeter diaphragm assembly 41 is disposed at the opening of the chamber 11 and closes the chamber 11. The tweeter voice coil 42 is connected to the tweeter diaphragm assembly 41. The tweeter central magnetic structure 43 is disposed in the chamber 11 and corresponds to the hollow area of the tweeter voice coil 42. In this embodiment, the tweeter diaphragm assembly 41 includes a tweeter diaphragm and a tweeter middle sticker disposed on the tweeter diaphragm. The outer edge of the tweeter diaphragm is hermetically connected to the metal chassis 1 to close the chamber 11. The tweeter central magnetic structure 43 includes a tweeter central magnet and a tweeter central washer. The tweeter central magnet connects the tweeter central washer and the metal chassis 1. The tweeter central washer is located at one end of the tweeter central magnet away from the woofer central magnetic structure 32.

[0037] To facilitate the positioning and installation of the tweeter central magnetic structure 43 on the metal chassis 1, a positioning hole 12 for positioning the tweeter central magnetic structure 43 is provided on the bottom wall of the chamber 11. It is easy to understand that the bottom wall of the chamber 11 is the wall surface of the chamber 11 close to the woofer central magnetic structure 32.

[0038] To increase the volume of the tweeter central magnet to enhance the magnetic field strength of the micro speaker and enable it to better cooperate with the woofer central magnetic structure 32 to improve its utilization rate, preferably, the positioning hole 12 is a through hole. In some embodiments, the end face of the tweeter central magnetic structure 43 away from the tweeter diaphragm assembly 41 is flush with the inner side wall of the metal chassis 1. In this embodiment, the end face of the tweeter central magnetic structure 43 away from the tweeter diaphragm assembly 41 protrudes relative to the inner side wall of the metal chassis 1.

[0039] To make the performance of the tweeter unit 4 adjustable, optionally, a rear chamber adjustment hole 13 communicating with the inner side wall of the metal chassis 1 is further provided on the bottom wall of the chamber 11. The rear chamber adjustment hole 13 is a through hole structure. The tweeter unit 4 further includes an adjustment block 44 for plugging the rear chamber adjustment hole 13. The adjustment block 44 is slidably disposed along the rear chamber adjustment hole 13. When the adjustment block 44 is in different positions in the rear chamber adjustment hole 13, the volume of the rear chamber of the tweeter unit 4 will be different.

[0040] In the tweeter unit 4, the number of the rear chamber adjustment holes 13 is one or more. When the number of the rear chamber adjustment holes 13 in the tweeter unit 4 is multiple, the adjustment of the volume of the rear chamber of the tweeter unit 4 is more flexible. In this embodiment, the rear chamber adjustment holes 13 are respectively provided at both ends of the tweeter central magnetic structure 43. Preferably, two of the rear chamber adjustment holes 13 are symmetrically arranged, so that the rear chamber of the tweeter unit 4 can be symmetrical, thereby improving the performance of the tweeter unit 4.

[0041] In some embodiments, only one chamber 11 is provided on the metal basin frame 1. In other embodiments, a plurality of chambers 11 may also be provided on the metal basin frame 1. At this time, each chamber 11 is provided with the tweeter unit 4.

[0042] In this embodiment, the chambers 11 are respectively provided on opposite sides of the metal basin frame 1, and preferably, the chambers 11 located on opposite sides of the metal basin frame 1 are symmetrically arranged. This can make the force on the micro speaker more balanced during operation.

[0043] The above are only alternative embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A micro speaker, characterized in that: including a metal basin frame, on the outer side wall of which there is a chamber; a bass vibration component, which includes a bass diaphragm component and a bass voice coil, and the bass diaphragm component connects the top of the basin frame to the bass voice coil; a bass magnetic circuit component, which includes a yoke and a bass center magnetic structure arranged on the yoke, the yoke connects to the metal basin frame, and the bass center magnetic structure is arranged corresponding to the hollow area of the bass voice coil; a treble unit, which includes a treble diaphragm component, a treble voice coil and a treble center magnetic structure, the treble diaphragm component is arranged at the opening of the chamber and closes the chamber, the treble voice coil connects the treble diaphragm component, and the treble center magnetic structure is arranged in the chamber and corresponding to the hollow area of the treble voice coil.

2. The micro speaker according to claim 1, wherein: A positioning hole for positioning the treble center magnetic structure is provided on the bottom wall of the chamber.

3. The micro speaker according to claim 2, characterized in that: The positioning hole is a through hole, and the end face of the treble center magnetic structure away from the treble diaphragm component is flush with the inner side wall of the metal basin frame, or the end face of the treble center magnetic structure away from the treble diaphragm component protrudes relative to the inner side wall of the metal basin frame.

4. The micro-speaker according to claim 1, characterized in that: A rear chamber adjustment hole communicating with the inner side wall of the metal basin frame is further provided on the bottom wall of the chamber, the rear chamber adjustment hole is a through hole structure, and the treble unit further includes an adjustment block for plugging the rear chamber adjustment hole, and the adjustment block is slidably arranged along the rear chamber adjustment hole.

5. The micro speaker according to claim 4, wherein: In the treble unit, the number of the rear chamber adjustment holes is multiple.

6. The micro-speaker according to claim 5, wherein: The rear chamber adjustment holes are respectively arranged corresponding to both ends of the treble center magnetic structure.

7. The micro-speaker according to claim 1, wherein: A plurality of the chambers are provided on the metal basin frame, and each chamber is provided with the treble unit.

8. The micro-speaker according to claim 7, characterized in that: The chambers are respectively arranged on opposite sides of the metal basin frame, and the chambers located on opposite sides of the metal basin frame are symmetrically arranged.

9. The micro speaker according to claim 1, characterized in that: The bass center magnetic structure includes a bass center magnet and a bass center washer, and the bass center magnet connects the bass center washer to the yoke.

10. The micro speaker according to claim 1, wherein: The treble center magnetic structure includes a treble center magnet and a treble center washer, the treble center magnet connects the treble center washer to the metal basin frame, and the treble center washer is located at the end of the treble center magnet away from the bass center magnetic structure.

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