Miniature loudspeaker

Abstract

The miniature loudspeaker comprises a basin stand, a magnetic circuit assembly, a treble vibration assembly, a bass vibration assembly and a conducting piece, the magnetic circuit assembly comprises a yoke, a central magnetic structure and an edge magnetic structure, the central magnetic structure and the edge magnetic structure are respectively arranged on the yoke, the edge magnetic structure is connected with the basin stand, and a bass magnetic gap is formed between the central magnetic structure and the edge magnetic structure. The central magnetic structure comprises an inner magnetic structure, and lower magnetic steel, a lower annular washer and annular upper magnetic steel which are sequentially stacked and connected from bottom to top, the inner magnetic structure is arranged on the lower magnetic steel, the top of the inner magnetic structure extends into a hollow area of the annular upper magnetic steel, and a high-pitch magnetic gap is formed between the inner magnetic structure and the annular upper magnetic steel; the high-pitch vibration assembly comprises a high-pitch vibrating diaphragm assembly and a high-pitch voice coil which are connected, the high-pitch vibrating diaphragm assembly is connected with the annular upper magnetic steel, and the high-pitch voice coil is arranged corresponding to the high-pitch magnetic gap; the bass vibration assembly comprises a bass vibrating diaphragm assembly and a bass voice coil which are connected, and the bass vibrating diaphragm assembly is arranged around the treble vibrating diaphragm assembly. The miniature loudspeaker is thin in thickness and good in acoustic performance.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic converters, in particular to a miniature loudspeaker. Background Art

[0002] The tweeter and woofer of the coaxial micro speaker each contain an independent vibration system and magnetic circuit system, and the structure is complex. The overall height of the coaxial micro speaker composed of the tweeter and woofer is increased, which makes it inconvenient to install due to its high height, reducing the applicability of the product. In addition, the coaxial micro speaker requires the design of a conduction circuit, which will take up a large space, thereby limiting the improvement of the acoustic performance of the coaxial micro speaker. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a micro loudspeaker with good acoustic performance and thin thickness.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a micro speaker, comprising:

[0005] basin rack;

[0006] A magnetic circuit assembly, the magnetic circuit assembly comprising a yoke and a central magnetic structure and a side magnetic structure respectively provided on the yoke, the side magnetic structure being connected to the basin frame, a bass magnetic gap being formed between the central magnetic structure and the side magnetic structure, the central magnetic structure comprising an inner magnetic structure and a lower magnetic steel, a lower annular washer and an annular upper magnetic steel stacked and connected in sequence from bottom to top, the inner magnetic structure being provided on the lower magnetic steel, the top of the inner magnetic structure extending into the hollow area of the annular upper magnetic steel, and a treble magnetic gap being formed between the inner magnetic structure and the annular upper magnetic steel;

[0007] A tweeter vibration assembly, the tweeter vibration assembly comprising a connected tweeter diaphragm assembly and a tweeter voice coil, the tweeter diaphragm assembly being connected to the annular upper magnetic steel, and the tweeter voice coil being arranged corresponding to the tweeter magnetic gap;

[0008] A bass vibration assembly, the bass vibration assembly comprising a connected bass diaphragm assembly and a bass voice coil, the bass diaphragm assembly being arranged around the tweeter diaphragm assembly, the bass diaphragm assembly being connected to the annular upper magnetic steel and the basin frame, and the bass voice coil being arranged corresponding to the bass magnetic gap;

[0009] The conductive part, the lower magnetic steel and the internal magnetic structure respectively have through holes for the conductive part to pass through, the conductive part has an inner conductive part and an outer conductive part that are electrically connected, the inner conductive part is electrically connected to the tweeter voice coil, and the yoke has an airtight window for exposing the outer conductive part.

[0010] In one embodiment, the inner magnetic structure includes an inner magnetic steel and an inner washer, the bottom surface of the inner magnetic steel is connected to the top surface of the lower magnetic steel, and the top surface of the inner magnetic steel is connected to the bottom surface of the inner washer.

[0011] In one embodiment, the inner magnetic steel is adhesively connected to the lower magnetic steel.

[0012] In one embodiment, the inner magnetic steel and the lower magnetic steel are integrally processed and formed into an integrated structure.

[0013] In one embodiment, the bottom of the inner magnetic steel has an outwardly protruding extension.

[0014] In one embodiment, the top surface of the extension portion is lower than or flush with the top surface of the lower annular washer.

[0015] In one embodiment, the conductive part is an FPC board, and the conductive part includes a first arm, a second arm and a third arm, the two ends of the first arm are respectively vertically connected to the second arm, and the end of the second arm away from the first arm is vertically connected to the third arm, the first arm is fixed to the bottom surface of the lower magnetic steel and is located in the airproof window, the second arm is passed through the through hole, and the third arm is fixed to the top surface of the internal magnetic structure, the inner conductive part is provided on the third arm, and the outer conductive part is provided on the first arm.

[0016] In one embodiment, the thickness of the first arm is smaller than the thickness of the yoke.

[0017] In one embodiment, the central magnetic structure further includes an upper annular washer disposed on the top of the annular upper magnetic steel.

[0018] The beneficial effects of the present invention are as follows: the micro-speaker has a novel structure, and its tweeter does not protrude excessively, so that the thickness of the micro-speaker can be kept relatively thin, making the micro-speaker suitable for installation environments with relatively narrow installation space, which is in line with the development trend of lightweight and thin portable electronic devices; the conductive part has a compact structure and occupies little space, which is conducive to improving the acoustic performance of the micro-speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 is a cross-sectional view of the micro-speaker according to the first embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of a micro-speaker according to the second embodiment of the present invention.

[0022] Description of Figure Numbers:

[0023] 1. Basin rack;

[0024] 2. Magnetic circuit assembly; 21. Yoke; 211. Airtight window; 22. Center magnetic structure; 221. Inner magnetic structure; 2211. Inner magnetic steel; 2212. Inner washer; 2213. Extension; 222. Lower magnetic steel; 223. Lower annular washer; 224. Upper annular magnetic steel; 225. Upper annular washer; 23. Side magnetic structure;

[0025] 3. Tweeter vibration assembly; 31. Tweeter diaphragm assembly; 32. Tweeter voice coil;

[0026] 4. Bass vibration assembly; 41. Bass diaphragm assembly; 42. Bass voice coil;

[0027] 5. Conductive element; 51. First arm; 52. Second arm; 53. Third arm. DETAILED DESCRIPTION

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

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

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

[0031] In addition, if the embodiments of the present invention include descriptions of "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0032] In addition, if the word "and / or" appears throughout the text, it means that three parallel solutions are included. For example, "and / or" includes solutions, or solutions, or solutions that meet all of the requirements simultaneously. In addition, the technical solutions of various embodiments may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. If the combination of technical solutions is mutually contradictory or cannot be implemented, it shall be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0033] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0034] Example 1

[0035] Please refer to Figure 1 , Embodiment 1 of the present utility model is: a micro speaker, including a basin frame 1, a magnetic circuit component 2, a treble vibration component 3, a bass vibration component 4 and a conductive member 5, the magnetic circuit component 2 includes a yoke 21 and a central magnetic structure 22 and a side magnetic structure 23 respectively provided on the yoke 21, the side magnetic structure 23 is connected to the basin frame 1, and a bass magnetic gap is formed between the central magnetic structure 22 and the side magnetic structure 23, the central magnetic structure 22 includes an inner magnetic structure 221 and a lower magnetic steel 222, a lower annular washer 223 and an annular upper magnetic steel 224 stacked and connected from bottom to top, the inner magnetic structure 221 is provided on the lower magnetic steel 222, the top of the inner magnetic structure 221 extends into the hollow area of the annular upper magnetic steel 224, and a treble magnetic gap is formed between the inner magnetic structure 221 and the annular upper magnetic steel 224;

[0036] The tweeter vibration assembly 3 includes a connected tweeter diaphragm assembly 31 and a tweeter voice coil 32, the tweeter diaphragm assembly 31 is connected to the annular upper magnetic steel 224, and the tweeter voice coil 32 is arranged corresponding to the tweeter magnetic gap; the bass vibration assembly 4 includes a connected bass diaphragm assembly 41 and a bass voice coil 42, the bass diaphragm assembly 41 is arranged around the tweeter diaphragm assembly 31, the bass diaphragm assembly 41 is connected to the annular upper magnetic steel 224 and the basin frame 1, and the bass voice coil 42 is arranged corresponding to the bass magnetic gap;

[0037] The lower magnetic steel 222 and the internal magnetic structure 221 respectively have through holes for the conductive part 5 to pass through. The conductive part 5 has an inner conductive part and an outer conductive part that are electrically connected. The inner conductive part is electrically connected to the tweeter coil 32. The yoke 21 has an airtight window 211 for exposing the outer conductive part.

[0038] Specifically, the internal magnetic structure 221 includes an inner magnetic steel 2211 and an inner washer 2212. The bottom surface of the inner magnetic steel 2211 is connected to the top surface of the lower magnetic steel 222, and the top surface of the inner magnetic steel 2211 is connected to the bottom surface of the inner washer 2212. In this embodiment, the inner magnetic steel 2211 and the lower magnetic steel 222 are integrally formed, and the top surface of the inner magnetic steel 2211 is adhesively bonded to the inner washer 2212.

[0039] In order to increase the total volume of the magnetic steel and thus further improve the acoustic performance of the micro speaker, in this embodiment, the bottom of the inner magnetic steel 2211 has an outwardly protruding extension portion 2213. Preferably, the top surface of the extension portion 2213 is lower than or flush with the top surface of the lower annular washer 223, that is, the extension portion 2213 is located in the hollow area of the lower annular washer 223.

[0040] Optionally, the conductive part 5 is an FPC board, and the conductive part 5 includes a first arm 51, a second arm 52 and a third arm 53. The two ends of the first arm 51 are respectively vertically connected to the second arm 52, and the end of the second arm 52 away from the first arm 51 is vertically connected to the third arm 53. The first arm 51 is fixed to the bottom surface of the lower magnetic steel 222 and is located in the airproof window 211, the second arm 52 is passed through the through hole, and the third arm 53 is fixed to the top surface of the internal magnetic structure 221. The internal conductive part is provided on the third arm 53, and the external conductive part is provided on the first arm 51.

[0041] In order to protect the first arm 51 to a certain extent, the thickness of the first arm 51 is smaller than the thickness of the yoke 21 .

[0042] In order to improve the acoustic performance of the micro speaker, in this embodiment, the central magnetic structure 22 further includes an upper annular washer 225 disposed on the top of the annular upper magnetic steel 224 .

[0043] Example 2

[0044] Please refer to Figure 2 The second embodiment of the present invention is a parallel technical solution to the first embodiment. It differs from the first embodiment in that the inner magnetic steel 2211 and the lower magnetic steel 222 are separate structures, and the inner magnetic steel 2211 and the lower magnetic steel 222 are adhesively connected. This can reduce waste during the magnetic steel shaping process, helping to save material costs.

[0045] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the practical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A micro speaker, characterized in that: include basin rack; A magnetic circuit assembly, the magnetic circuit assembly comprising a yoke and a central magnetic structure and a side magnetic structure respectively provided on the yoke, the side magnetic structure being connected to the basin frame, a bass magnetic gap being formed between the central magnetic structure and the side magnetic structure, the central magnetic structure comprising an inner magnetic structure and a lower magnetic steel, a lower annular washer and an annular upper magnetic steel stacked and connected in sequence from bottom to top, the inner magnetic structure being provided on the lower magnetic steel, the top of the inner magnetic structure extending into the hollow area of the annular upper magnetic steel, and a treble magnetic gap being formed between the inner magnetic structure and the annular upper magnetic steel; A tweeter vibration assembly, the tweeter vibration assembly comprising a connected tweeter diaphragm assembly and a tweeter voice coil, the tweeter diaphragm assembly being connected to the annular upper magnetic steel, and the tweeter voice coil being arranged corresponding to the tweeter magnetic gap; A bass vibration assembly, the bass vibration assembly comprising a connected bass diaphragm assembly and a bass voice coil, the bass diaphragm assembly being arranged around the tweeter diaphragm assembly, the bass diaphragm assembly being connected to the annular upper magnetic steel and the basin frame, and the bass voice coil being arranged corresponding to the bass magnetic gap; The conductive part, the lower magnetic steel and the internal magnetic structure respectively have through holes for the conductive part to pass through, the conductive part has an inner conductive part and an outer conductive part that are electrically connected, the inner conductive part is electrically connected to the tweeter voice coil, and the yoke has an airtight window for exposing the outer conductive part.

2. The micro-speaker according to claim 1, wherein: The inner magnetic structure includes an inner magnetic steel and an inner washer. The bottom surface of the inner magnetic steel is connected to the top surface of the lower magnetic steel, and the top surface of the inner magnetic steel is connected to the bottom surface of the inner washer.

3. The micro-speaker according to claim 2, wherein: The inner magnetic steel is adhesively connected to the lower magnetic steel.

4. The micro-speaker according to claim 2, wherein: The inner magnetic steel and the lower magnetic steel are an integrally formed structure.

5. The micro-speaker according to claim 2, wherein: The bottom of the inner magnetic steel has an outwardly protruding extension.

6. The micro-speaker according to claim 5, wherein: The top surface of the extension portion is lower than or flush with the top surface of the lower annular washer.

7. The micro-speaker according to claim 1, wherein: The conductive part is an FPC board, and the conductive part includes a first arm, a second arm and a third arm. The two ends of the first arm are respectively vertically connected to the second arm, and the end of the second arm away from the first arm is vertically connected to the third arm. The first arm is fixed to the bottom surface of the lower magnetic steel and is located in the airproof window, the second arm is passed through the through hole, and the third arm is fixed to the top surface of the internal magnetic structure. The inner conductive part is provided on the third arm, and the outer conductive part is provided on the first arm.

8. The micro-speaker according to claim 7, wherein: The thickness of the first arm is smaller than the thickness of the yoke.

9. The micro-speaker according to claim 1, wherein: The central magnetic structure further includes an upper annular washer disposed on the top of the annular upper magnetic steel.

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