Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a frame, a yoke, a central magnetic structure, a first diaphragm assembly, a second diaphragm assembly, a vertical voice coil, a main washer and two groups of outer magnetic structures, and is characterized in that two groups of driving coils are fixedly arranged in the frame and are arranged at intervals; the yoke is connected to the bottom of the basin stand; the central magnetic structure is arranged in the middle area of the yoke and is provided with a magnetic gap; the first diaphragm assembly is connected to the top of the frame, the center of the first diaphragm assembly is provided with a window, and the edge of the window is connected with the central magnetic structure. The second diaphragm assembly is connected with the central magnetic structure and seals the window; the number of the vertical voice coils is multiple, and the vertical voice coils are located in the magnetic gap and are connected with the second vibrating diaphragm assembly. The two groups of outer magnetic structures are positioned in the basin frame and are matched with the two groups of driving coils in a one-to-one correspondence manner; the main washer comprises an annular supporting part, an elevated part and a mounting part, and the outer side magnetic structure is mounted on the mounting part. The miniature loudspeaker is novel in structure and excellent in 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] Mobile terminals such as mobile phones and tablet computers enrich people's lives. Micro speakers, as audio devices, play an indispensable role in mobile terminals such as mobile phones and tablet computers.

[0003] As consumers' requirements for micro-speaker performance continue to increase, existing micro-speakers with a single voice coil structure or a dual voice coil structure are increasingly unable to meet consumer needs. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a high-performance micro speaker with a new structure.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a miniature speaker, comprising:

[0006] A basin frame, wherein two groups of driving coils are fixedly arranged in the basin frame, and the two groups of driving coils are arranged at intervals;

[0007] A yoke connected to the bottom of the basin frame;

[0008] A central magnetic structure, the central magnetic structure is arranged in the middle area of ​​the yoke, and the central magnetic structure has a magnetic gap;

[0009] A first diaphragm assembly, wherein the first diaphragm assembly is connected to the top of the basin frame, a window is provided in the center of the first diaphragm assembly, and an edge of the window is connected to the central magnetic structure;

[0010] a second diaphragm assembly, the second diaphragm assembly being connected to the central magnetic structure and enclosing the window;

[0011] A vertical voice coil, wherein the number of the vertical voice coils is plural, and the vertical voice coil is located in the magnetic gap and connected to the second diaphragm assembly;

[0012] Two groups of outer magnetic structures, the two groups of outer magnetic structures are located in the basin frame and cooperate with the two groups of driving coils in a one-to-one correspondence;

[0013] The main washer includes an annular support portion, an elevated portion and a mounting portion, the annular support portion is connected to the first diaphragm assembly, the two sides of the annular support portion are respectively connected to the elevated portions, the mounting portion is connected to the elevated portions, the outer magnetic structure is mounted on the mounting portion, and the hollow area of ​​the annular support portion is arranged corresponding to the central magnetic structure.

[0014] In one embodiment, each group of the driving coils includes two horizontal voice coils arranged opposite to each other, one of the horizontal voice coils is located above the other horizontal voice coil, and each group of the outer magnetic structures includes two first magnetic steels, and the two horizontal voice coils correspond to the two first magnetic steels in a one-to-one manner; the first magnetic steels are respectively installed on the top and bottom surfaces of the mounting portion, and one end of the mounting portion close to the elevated portion passes through the gap between the two horizontal voice coils in the driving coil to connect to the elevated portion.

[0015] In one embodiment, each group of the outer magnetic structures further includes two first washers, the surface of the first magnetic steel away from the mounting portion is connected to the first washers, and the two first washers are connected to the two first magnetic steels in a one-to-one correspondence.

[0016] In one embodiment, the first diaphragm assembly includes a first sound membrane and a first spherical top connected to the first sound membrane, the first sound membrane includes a first folding ring portion, an inner fixed portion, a second folding ring portion and an outer fixed portion which are sequentially connected from the inside to the outside, the first spherical top is connected to the inner fixed portion, the inner edge of the first folding ring portion is connected to the central magnetic structure, and the annular support portion is connected to the inner fixed portion or the first spherical top.

[0017] In one embodiment, the central magnetic structure includes a lower center magnetic steel, a lower side magnetic steel, a washer plate, an upper center magnetic steel, an upper side magnetic steel, an upper center washer and an annular washer, the lower center magnetic steel and the lower side magnetic steel are both arranged on the yoke, the lower center magnetic steel is located between at least one group of two lower side magnetic steels arranged oppositely, the bottom surface of the washer plate connects the top surface of the lower center magnetic steel and the top surface of the lower side magnetic steel, the upper center magnetic steel and the upper side magnetic steel are both arranged on the top surface of the washer plate, the upper center magnetic steel is located between at least one group of two upper side magnetic steels arranged oppositely, The center washer is arranged on the top surface of the upper center magnetic steel, the annular washer is arranged on the top surface of the upper side magnetic steel around the upper center washer, the first diaphragm assembly and the second diaphragm assembly are respectively connected to the annular washer, the magnetic gap includes a first gap between the upper center washer and the annular washer, a second gap between the upper center magnetic steel and the upper side magnetic steel, a through hole arranged on the washer plate, and a third gap between the lower center magnetic steel and the lower side magnetic steel, the second gap is connected to the first gap and is connected to the third gap via the through hole.

[0018] In one embodiment, a lower side of the vertical voice coil is located in the through hole.

[0019] In one embodiment, the annular washer includes a ring frame portion and a surrounding wall portion arranged along the edge of the ring frame portion, the bottom surface of the ring frame portion is connected to the top surface of the upper magnetic steel, the surrounding wall portion protrudes toward the side of the ring frame portion away from the yoke, and the first diaphragm assembly and the second diaphragm assembly are respectively connected to the upper part of the surrounding wall portion.

[0020] The beneficial effects of the utility model are: the micro speaker has a novel structure and a moving iron woofer, the bass sensitivity can be significantly improved, the transient performance of bass playback is better, and the dynamic performance and instantaneous detail performance when playing music are more excellent; the tweeter adopts a vertical voice coil drive, the overall BL value is significantly increased, the playback sound quality is good, and the performance is superior. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 is a cross-sectional view of the micro-speaker of the first embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the micro speaker according to the first embodiment of the present utility model.

[0024] Description of Figure Numbers:

[0025] 1. Basin stand;

[0026] 2. Yoke iron;

[0027] 3. Central magnetic structure; 31. Lower center magnetic steel; 32. Lower side magnetic steel; 33. Washer plate; 34. Upper center magnetic steel; 35. Upper side magnetic steel; 36. Upper center washer; 37. Ring washer; 371. Ring frame; 372. Wall portion;

[0028] 4. The first diaphragm assembly;

[0029] 5. The second diaphragm assembly;

[0030] 6. Vertical voice coil;

[0031] 7. Main washer; 71. Annular support part; 72. Elevated part; 73. Mounting part;

[0032] 8. Outer magnetic structure; 81. First magnetic steel; 82. First washer;

[0033] 9. Driving coil; 91. Horizontal voice coil. DETAILED DESCRIPTION

[0034] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] 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 components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0038] In addition, if the meaning of "and / or" appears in the full text is to include three parallel solutions, taking "and / or" as an example, it includes solutions, or solutions, or solutions that are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory 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 this utility model.

[0039] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] Embodiment 1

[0041] Please refer to Figure 1 and Figure 2 , Embodiment 1 of the utility model is: a miniature loudspeaker, comprising a basin frame 1, a yoke 2, a central magnetic structure 3, a first diaphragm assembly 4, a second diaphragm assembly 5, a vertical voice coil 6, a main washer 7 and two groups of outer magnetic structures 8, wherein two groups of drive coils 9 are fixedly arranged in the basin frame 1, and the two groups of drive coils 9 are arranged at intervals; the yoke 2 is connected to the bottom of the basin frame 1; the central magnetic structure 3 is arranged in the middle area of ​​the yoke 2 and is located between the two groups of drive coils 9, and the central magnetic structure 3 has a magnetic gap; the first diaphragm assembly 4 is connected to the top of the basin frame 1, and a window is provided in the center of the first diaphragm assembly 4, and the edge of the window is connected to the central magnetic structure 3; the second diaphragm assembly 5 is connected to the central magnetic structure 3 and closes the Window; there are multiple vertical voice coils 6, and the vertical voice coils 6 are located in the magnetic gap and connected to the second diaphragm assembly 5. In the present embodiment, there are two vertical voice coils 6, and the two vertical voice coils 6 are arranged opposite to each other; the two groups of outer magnetic structures 8 are located in the basin frame 1 and cooperate with the two groups of driving coils 9 in a one-to-one manner; the main washer 7 includes an annular support portion 71, an elevated portion 72 and a mounting portion 73, the annular support portion 71 is connected to the first diaphragm assembly 4, and the two sides of the annular support portion 71 are respectively connected to the elevated portions 72, and the mounting portion 73 is connected to the elevated portions 72, the outer magnetic structure 8 is installed on the mounting portion 73, and the hollow area of ​​the annular support portion 71 is arranged corresponding to the central magnetic structure 3.

[0042] In detail, each group of the driving coils 9 includes two horizontal voice coils 91 arranged opposite to each other, one of the horizontal voice coils 91 is located above the other horizontal voice coil 91, and each group of the outer magnetic structures 8 includes two first magnetic steels 81, and the two horizontal voice coils 91 correspond to the two first magnetic steels 81 one by one; the top and bottom surfaces of the mounting portion 73 are respectively installed with the first magnetic steels 81, and one end of the mounting portion 73 close to the elevated portion 72 passes through the gap between the two horizontal voice coils 91 in the driving coil 9 to connect to the elevated portion 72.

[0043] In order to optimize the magnetic circuit of the outer magnetic structure 8, preferably, each group of the outer magnetic structure 8 also includes two first washers 82, the surface of the first magnetic steel 81 away from the mounting portion 73 is connected to the first washers 82, and the two first washers 82 are connected to the two first magnetic steels 81 one by one.

[0044] When the micro speaker is viewed from a top-down perspective, the first washer 82 and the first magnetic steel 81 are both located in the hollow area of ​​the horizontal voice coil 91. This can prevent the outer magnetic structure 8 from colliding with the horizontal voice coil 91 during the vibration of the first diaphragm assembly 4, thereby ensuring the lightness and thinness of the micro speaker.

[0045] Specifically, the first diaphragm assembly 4 includes a first sound membrane and a first spherical top connected to the first sound membrane, the first sound membrane includes a first folding ring portion, an inner fixed portion, a second folding ring portion and an outer fixed portion which are sequentially connected from the inside to the outside, the first spherical top is connected to the inner fixed portion, the inner edge of the first folding ring portion is connected to the central magnetic structure 3, and the annular support portion 71 is connected to the inner fixed portion or the first spherical top.

[0046] The central magnetic structure 3 includes a lower center magnetic steel 31, a lower side magnetic steel 32, a washer plate 33, an upper center magnetic steel 34, an upper side magnetic steel 35, an upper center washer 36 and an annular washer 37. The lower center magnetic steel 31 and the lower side magnetic steel 32 are both arranged on the yoke 2. The lower center magnetic steel 31 is located between at least one group of two oppositely arranged lower side magnetic steels 32. The bottom surface of the washer plate 33 connects the top surface of the lower center magnetic steel 31 and the top surface of the lower side magnetic steel 32. The upper center magnetic steel 34 and the upper side magnetic steel 35 are both arranged on the top surface of the washer plate 33. The upper center magnetic steel 34 is located between at least one group of two oppositely arranged upper side magnetic steels 35. The upper center washer 36 is arranged on the top surface of the upper center magnetic steel 34, the annular washer 37 is arranged on the top surface of the upper side magnetic steel 35 around the upper center washer 36, the first diaphragm assembly 4 and the second diaphragm assembly 5 are respectively connected to the annular washer 37, the magnetic gap includes a first gap between the upper center washer 36 and the annular washer 37, a second gap between the upper center magnetic steel 34 and the upper side magnetic steel 35, a through hole arranged on the washer plate 33, and a third gap between the lower center magnetic steel 31 and the lower side magnetic steel 32, the second gap is connected to the first gap and is connected to the third gap via the through hole.

[0047] When the first diaphragm assembly 4 is not working, the lower side of the vertical voice coil 6 is located in the through hole, so that the lower side of the vertical voice coil 6 is located in an area where the magnetic lines of force are more concentrated, which is beneficial to improving the performance of the micro speaker.

[0048] The annular washer 37 includes an annular frame portion 371 and a surrounding wall portion 372 arranged along the edge of the annular frame portion 371, the bottom surface of the annular frame portion 371 is connected to the top surface of the upper magnetic steel 35, the surrounding wall portion 372 protrudes toward the side of the annular frame portion 371 away from the yoke 2, and the first diaphragm assembly 4 and the second diaphragm assembly 5 are respectively connected to the upper part of the surrounding wall portion 372. Preferably, the annular frame portion 371 and the surrounding wall portion 372 are an integral structure formed by integral processing.

[0049] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used 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 A basin frame, wherein two groups of driving coils are fixedly arranged in the basin frame, and the two groups of driving coils are arranged at intervals; A yoke connected to the bottom of the basin frame; A central magnetic structure, the central magnetic structure is arranged in the middle area of ​​the yoke, and the central magnetic structure has a magnetic gap; A first diaphragm assembly, wherein the first diaphragm assembly is connected to the top of the basin frame, a window is provided in the center of the first diaphragm assembly, and an edge of the window is connected to the central magnetic structure; a second diaphragm assembly, the second diaphragm assembly being connected to the central magnetic structure and enclosing the window; A vertical voice coil, wherein the number of the vertical voice coils is plural, and the vertical voice coil is located in the magnetic gap and connected to the second diaphragm assembly; Two groups of outer magnetic structures, the two groups of outer magnetic structures are located in the basin frame and cooperate with the two groups of driving coils in a one-to-one correspondence; The main washer includes an annular support portion, an elevated portion and a mounting portion, the annular support portion is connected to the first diaphragm assembly, the two sides of the annular support portion are respectively connected to the elevated portions, the mounting portion is connected to the elevated portions, the outer magnetic structure is mounted on the mounting portion, and the hollow area of ​​the annular support portion is arranged corresponding to the central magnetic structure.

2. The micro-speaker according to claim 1, characterized in that: Each group of the driving coils includes two horizontal voice coils arranged opposite to each other, one of the horizontal voice coils is located above the other horizontal voice coil, and each group of the outer magnetic structures includes two first magnetic steels, and the two horizontal voice coils correspond to the two first magnetic steels in a one-to-one manner; the first magnetic steels are respectively installed on the top and bottom surfaces of the mounting portion, and one end of the mounting portion close to the elevated portion passes through the gap between the two horizontal voice coils in the driving coil to connect to the elevated portion.

3. The micro-speaker according to claim 2, characterized in that: Each group of the outer magnetic structures further includes two first washers, the surface of the first magnetic steel away from the mounting portion is connected to the first washers, and the two first washers are connected to the two first magnetic steels in a one-to-one correspondence.

4. The micro-speaker according to claim 1, characterized in that: The first diaphragm assembly includes a first diaphragm and a first spherical top connected to the first diaphragm, the first diaphragm includes a first folding ring portion, an inner fixed portion, a second folding ring portion and an outer fixed portion which are sequentially connected from the inside to the outside, the first spherical top is connected to the inner fixed portion, the inner edge of the first folding ring portion is connected to the central magnetic structure, and the annular support portion is connected to the inner fixed portion or the first spherical top.

5. The micro-speaker according to claim 1, characterized in that: The central magnetic structure includes a lower center magnetic steel, a lower side magnetic steel, a washer plate, an upper center magnetic steel, an upper side magnetic steel, an upper center washer and an annular washer. The lower center magnetic steel and the lower side magnetic steel are both arranged on the yoke iron. The lower center magnetic steel is located between at least one group of two lower side magnetic steels arranged oppositely. The bottom surface of the washer plate connects the top surface of the lower center magnetic steel and the top surface of the lower side magnetic steel. The upper center magnetic steel and the upper side magnetic steel are both arranged on the top surface of the washer plate. The upper center magnetic steel is located between at least one group of two upper side magnetic steels arranged oppositely. The first diaphragm assembly and the second diaphragm assembly are respectively connected to the annular washers. The magnetic gap includes a first gap between the upper center washer and the annular washer, a second gap between the upper center magnetic steel and the upper side magnetic steel, a through hole provided on the washer plate, and a third gap between the lower center magnetic steel and the lower side magnetic steel. The second gap is connected to the first gap and is connected to the third gap via the through hole.

6. The micro-speaker according to claim 5, characterized in that: The lower side of the vertical voice coil is located in the through hole.

7. The micro-speaker according to claim 5, characterized in that: The annular washer includes a ring frame portion and a surrounding wall portion arranged along the edge of the ring frame portion, the bottom surface of the ring frame portion is connected to the top surface of the upper magnetic steel, the surrounding wall portion protrudes toward the side of the ring frame portion away from the yoke iron, and the first diaphragm assembly and the second diaphragm assembly are respectively connected to the upper part of the surrounding wall portion.

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