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 a middle magnetic steel, and a lower magnetic steel, a central washer and an annular upper magnetic steel which are sequentially stacked and connected from bottom to top, the central washer is provided with an enclosure frame protruding in the direction away from the yoke, the enclosure frame is located in a hollow area of the annular upper magnetic steel, and a high-pitch magnetic gap is formed between the enclosure frame and the annular upper magnetic steel; the middle magnetic steel is arranged on the lower magnetic steel and is positioned in the enclosure frame; the high-pitch vibration assembly comprises a high-pitch vibration diaphragm assembly and a high-pitch voice coil which are connected, the high-pitch vibration 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 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 disposed 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 structures, the central magnetic structure comprising a central magnetic steel and a lower magnetic steel, a central washer, and an annular upper magnetic steel stacked and connected in sequence from bottom to top, the central washer having a surrounding frame protruding away from the yoke, the surrounding frame being located in a hollow region of the annular upper magnetic steel, a treble magnetic gap being formed between the surrounding frame and the annular upper magnetic steel, the central magnetic steel being disposed on the lower magnetic steel and within the surrounding frame;

[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 middle magnetic steel 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 airproof window for exposing the outer conductive part.

[0010] In one embodiment, the middle magnetic steel and the lower magnetic steel are an integrally formed structure.

[0011] In one embodiment, the middle magnetic steel and the lower magnetic steel are split structures, and the middle magnetic steel and the lower magnetic steel are adhesively connected.

[0012] In one embodiment, the outer peripheral wall of the middle magnetic steel contacts the inner peripheral wall of the surrounding frame.

[0013] In one embodiment, the top of the surrounding frame is higher than the top surface of the middle magnetic steel.

[0014] In one embodiment, a avoidance groove is provided on the top of the frame.

[0015] In one embodiment, the top of the frame has two avoidance grooves, and the two avoidance grooves are symmetrically arranged.

[0016] In one embodiment, the conductive component is an FPC board, and the conductive component 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 middle magnetic steel, the inner conductive part is provided on the third arm, and the outer conductive part is provided on the first arm.

[0017] In one embodiment, the thickness of the first arm is smaller than the thickness of the yoke.

[0018] In one embodiment, the central magnetic structure further includes an annular washer disposed on the top of the annular upper magnetic steel.

[0019] 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

[0020] 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.

[0021] Figure 1is a cross-sectional view of the micro-speaker according to the first embodiment of the present invention;

[0022] Figure 2 This is a schematic structural diagram of a portion of the micro-speaker according to the first embodiment of the present invention;

[0023] Figure 3 This is a schematic structural diagram of the center washer in the micro-speaker according to the first embodiment of the present invention;

[0024] Figure 4 This is a cross-sectional view of the micro-speaker according to the second embodiment of the present invention.

[0025] Description of Figure Numbers:

[0026] 1. Basin rack;

[0027] 2. Magnetic circuit assembly; 21. Yoke; 22. Center magnetic structure; 221. Middle magnetic steel; 222. Lower magnetic steel; 223. Center washer; 2231. Frame; 2232. Avoidance groove; 224. Annular upper magnetic steel; 225. Annular washer; 23. Side magnetic structure;

[0028] 3. Tweeter vibration assembly; 31. Tweeter diaphragm assembly; 32. Tweeter voice coil;

[0029] 4. Bass vibration assembly; 41. Bass diaphragm assembly; 42. Bass voice coil;

[0030] 5. Conductive element; 51. First arm; 52. Second arm; 53. Third arm. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Example 1

[0038] Please refer to Figures 1 to 3 , Embodiment 1 of the present utility model is: a micro speaker, including a basin frame 1, a magnetic circuit assembly 2, a tweeter vibration assembly 3, a bass vibration assembly 4 and a conductive member 5, the magnetic circuit assembly 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 a central magnetic steel 221 and a lower magnetic steel 222, a central washer 223 and an annular upper magnetic steel 224 stacked and connected from bottom to top, the central washer 223 has a surrounding frame 2231 protruding away from the yoke 21, the surrounding frame 2231 is located in a hollow area of the annular upper magnetic steel 224, and a tweeter magnetic gap is formed between the surrounding frame 2231 and the annular upper magnetic steel 224, the central magnetic steel 221 is provided on the lower magnetic steel 222 and located within the surrounding frame 2231;

[0039] 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;

[0040] The lower magnetic steel 222 and the middle magnetic steel 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 voice coil 32. The yoke 21 has an airtight window for exposing the outer conductive part.

[0041] To facilitate processing and manufacturing, the center washer 223 and the surrounding frame 2231 are preferably an integrated structure that is integrally processed and formed. Specifically, the surrounding frame 2231 and the center washer 223 are an integrated structure that is stamped from a piece of metal plate.

[0042] In this embodiment, the middle magnetic steel 221 and the lower magnetic steel 222 are integrally formed into an integrated structure, which can reduce the assembly steps of the micro speaker and improve the assembly efficiency of the micro speaker.

[0043] To further enhance the microspeaker's magnetic field strength and improve its acoustic performance, the outer wall of the central magnetic steel 221 contacts the inner wall of the frame 2231. Optionally, the outer wall of the central magnetic steel 221 and the inner wall of the frame 2231 are adhesively bonded to improve the structural stability of the microspeaker.

[0044] The top of the frame 2231 is arranged higher than the top surface of the middle magnetic steel 221, thereby preventing the connection between the conductive member 5 and the tweeter voice coil 32 or the protective glue at the connection from occupying the thickness space of the micro speaker.

[0045] The top of the frame 2231 is provided with an avoidance groove 2232, which is used to avoid the lead of the tweeter coil 32, thereby preventing the lead of the tweeter coil 32 from colliding with the frame 2231 during the vibration process of the tweeter coil 32 and generating noise.

[0046] In order to balance the center of gravity of the micro speaker, the top of the frame 2231 has two avoidance grooves 2232, and the two avoidance grooves 2232 are symmetrically arranged. The symmetry of the two avoidance grooves 2232 can be axial symmetry or rotational symmetry, and can be specifically arranged according to the structure of the tweeter voice coil 32.

[0047] 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, the second arm 52 is passed through the through hole, and the third arm 53 is fixed to the top surface of the middle magnetic steel 221. The inner conductive part is provided on the third arm 53, and the outer conductive part is provided on the first arm 51.

[0048] In order to protect the first arm 51 to a certain extent, the thickness of the first arm 51 is preferably smaller than the thickness of the yoke 21 .

[0049] In order to improve the acoustic performance of the micro speaker, in this embodiment, the central magnetic structure 22 further includes an annular washer 225 disposed on the top of the annular upper magnetic steel 224 .

[0050] Example 2

[0051] Please refer to Figure 4 The second embodiment of the present invention is a parallel technical solution of the first embodiment. It differs from the first embodiment in that the middle magnetic steel 221 and the lower magnetic steel 222 are separate structures. Optionally, the middle magnetic steel 221 and the lower magnetic steel 222 are adhesively connected. This can reduce waste during the magnetic steel shaping process, helping to save material costs.

[0052] 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 disposed 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 structures, the central magnetic structure comprising a central magnetic steel and a lower magnetic steel, a central washer, and an annular upper magnetic steel stacked and connected in sequence from bottom to top, the central washer having a surrounding frame protruding away from the yoke, the surrounding frame being located in a hollow region of the annular upper magnetic steel, a treble magnetic gap being formed between the surrounding frame and the annular upper magnetic steel, the central magnetic steel being disposed on the lower magnetic steel and within the surrounding frame; 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 middle magnetic steel 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 airproof window for exposing the outer conductive part.

2. The micro-speaker according to claim 1, wherein: The middle magnetic steel and the lower magnetic steel are an integral structure formed by integral processing.

3. The micro-speaker according to claim 1, wherein: The middle magnetic steel and the lower magnetic steel are split structures, and the middle magnetic steel and the lower magnetic steel are adhesively connected.

4. The micro-speaker according to claim 1, wherein: The outer peripheral wall of the middle magnetic steel contacts the inner peripheral wall of the surrounding frame.

5. The micro-speaker according to claim 1, wherein: The top end of the surrounding frame is arranged higher than the top surface of the middle magnetic steel.

6. The micro-speaker according to claim 5, wherein: The top of the enclosure frame is provided with an avoidance groove.

7. The micro-speaker according to claim 6, wherein: The top of the frame is provided with two avoidance grooves, which are symmetrically arranged.

8. 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 middle magnetic steel. The inner conductive part is provided on the third arm, and the outer conductive part is provided on the first arm.

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

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

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