Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a yoke, a central magnetic structure, an outer magnetic structure, a high pitch unit and a low pitch unit, and is characterized in that the yoke is provided with a flange; the central magnetic structure is arranged on the yoke; a bass magnetic gap is formed between the outer magnetic structure and the central magnetic structure, the outer magnetic structure comprises annular outer magnetic steel, an annular inner washer and an annular outer washer, the annular inner washer and the annular outer washer are connected to the top face of the annular outer magnetic steel, the annular inner washer is located in the annular outer washer, and an annular containing groove is formed in the top face of the annular outer magnetic steel. The annular accommodating groove is communicated with a gap between the annular inner washer and the annular outer washer to form a high-pitch magnetic gap, and the bottom surface of the annular outer magnetic steel is connected with the top of the flange; the high-pitch unit comprises a high-pitch vibrating diaphragm, a high-pitch middle patch and a high-pitch voice coil. The high-pitch vibrating diaphragm and the high-pitch middle patch are respectively in an annular frame shape. The miniature loudspeaker is provided with the high pitch unit and the low pitch unit at the same time, and the number of used magnetic steel is reduced, so that the miniature loudspeaker is convenient to assemble and manufacture.

Description

Technical Field

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

[0002] Nowadays, mobile terminals such as mobile phones and tablets enrich people's lives, and micro speakers play an indispensable role as audio devices.

[0003] As consumers have higher and higher requirements for the sound quality and loudness of the whole machine, the requirements for micro speakers are also further improved. In order to achieve a better experience, multiple micro speakers are often placed in a speaker, including a woofer, a midrange unit and a tweeter. The filter can filter out the redundant frequency bands and retain the desired effective bandwidth. Although the sound quality has improved, the size of the speaker has also increased and become bulky, and the cost has also increased. Integrating the tweeter and the woofer directly into a micro speaker will make the magnetic circuit of the micro speaker very complicated, so that a large number of magnets need to be installed when manufacturing the micro speaker, which is not convenient for the production of the micro speaker. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a miniature loudspeaker which has both a tweeter unit and a bass unit and is easy to assemble.

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

[0006] A yoke, wherein the yoke has a flange;

[0007] A central magnetic structure, wherein the central magnetic structure is disposed on the yoke;

[0008] An external magnetic structure, wherein a bass magnetic gap is formed between the external magnetic structure and the central magnetic structure, the external magnetic structure comprises an annular external magnetic steel and an annular inner washer and an annular outer washer respectively connected to the top surface of the annular external magnetic steel, the annular inner washer is located inside the annular outer washer, an annular receiving groove is provided on the top surface of the annular external magnetic steel, the annular receiving groove communicates with the gap between the annular inner washer and the annular outer washer to form a treble magnetic gap, and the bottom surface of the annular external magnetic steel is connected to the top of the flange;

[0009] A tweeter unit, the tweeter unit comprising a tweeter diaphragm, a tweeter middle sticker and a tweeter voice coil, the tweeter diaphragm and the tweeter middle sticker are respectively in the shape of a ring frame, the inner edge of the tweeter diaphragm is connected to the tweeter middle sticker and the tweeter voice coil, the outer edge of the tweeter diaphragm is connected to the annular outer washer, and the tweeter voice coil moves in the tweeter magnetic gap;

[0010] A woofer unit comprises a woofer middle sticker, a woofer voice coil and a woofer diaphragm respectively connected to the woofer middle sticker, the woofer voice coil and the treble middle sticker, and the woofer voice coil moves in the woofer magnetic gap.

[0011] Furthermore, the polarity of the annular outer magnetic steel region on one side of the tweeter magnetic gap is an N pole, and the polarity of the annular outer magnetic steel region on the other side of the tweeter magnetic gap is an S pole.

[0012] Furthermore, it also includes a supporting component, the inner side of the supporting component is connected to the bass voice coil, and the outer side of the supporting component is connected to the flange and / or the annular external magnetic steel.

[0013] Furthermore, the supporting component is a secondary membrane and / or a centering support piece.

[0014] Furthermore, the supporting assembly is in the shape of a ring frame as a whole.

[0015] Furthermore, it also includes a bracket, which is in the shape of a ring frame as a whole, the outer wall surface of the flange is connected to the bracket, and the top surface of the bracket is connected to the bottom surface of the annular external magnetic steel.

[0016] Furthermore, a first positioning structure is provided on the annular outer magnetic steel, and a second positioning structure cooperating with the first positioning structure is provided on the bracket.

[0017] Further, the first positioning structure is a positioning hole, and the second positioning structure is a positioning column; or, the first positioning structure is a positioning column, and the second positioning structure is a positioning hole.

[0018] Furthermore, the central magnetic structure includes a central magnetic steel and a central washer, the top surface of the central magnetic steel is connected to the central washer, the bottom surface of the central magnetic steel is connected to the yoke, and the bottom surface of the central magnetic steel is arranged lower than the bottom surface of the annular outer magnetic steel.

[0019] The beneficial effects of the utility model are:

[0020] The micro speaker has a novel structure and has both a tweeter and a woofer, which is beneficial to optimizing the space occupied by the entire device, conforms to the development trend of thinner and lighter electronic devices, and meets users' high requirements for the sound quality of electroacoustic converters.

[0021] The tweeter magnetic gap is directly arranged on the annular outer magnetic steel, which is beneficial to simplifying the magnetic circuit of the micro speaker, reducing the number of magnetic steels used to facilitate the assembly and manufacturing of the micro speaker, thereby reducing the manufacturing cost of the micro speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a micro speaker according to Embodiment 1 of the present utility model;

[0023] Figure 2 is a cross-sectional view of the micro-speaker of the first embodiment of the utility model;

[0024] Figure 3 A cross-sectional view of the micro-speaker of the first embodiment of the utility model from another perspective;

[0025] Figure 4 This is an exploded view of the micro speaker according to the first embodiment of the present invention.

[0026] Description of labels:

[0027] 1. Yoke iron; 11. Flanging;

[0028] 2. Center magnetic structure; 21. Center magnetic steel; 22. Center washer;

[0029] 3. External magnetic structure; 31. Annular external magnetic steel; 311. Annular receiving groove; 312. Positioning hole; 32. Annular inner washer; 33. Annular outer washer;

[0030] 4. Tweeter unit; 41. Tweeter diaphragm; 42. Tweeter mid-strip; 43. Tweeter voice coil;

[0031] 5. Bass unit; 51. Bass diaphragm; 52. Bass center sticker; 53. Bass voice coil;

[0032] 6. Support components;

[0033] 7. Bracket; 71. Positioning column. DETAILED DESCRIPTION

[0034] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0035] Please refer to Figures 1 to 4 , a micro speaker, comprising:

[0036] A yoke 1, wherein the yoke 1 has a flange 11;

[0037] A central magnetic structure 2, wherein the central magnetic structure 2 is arranged on the yoke 1;

[0038] An external magnetic structure 3, a bass magnetic gap is formed between the external magnetic structure 3 and the central magnetic structure 2, the external magnetic structure 3 includes an annular external magnetic steel 31 and an annular inner washer 32 and an annular outer washer 33 respectively connected to the top surface of the annular external magnetic steel 31, the annular inner washer 32 is located in the annular outer washer 33, the top surface of the annular external magnetic steel 31 is provided with an annular receiving groove 311, the annular receiving groove 311 communicates with the gap between the annular inner washer 32 and the annular outer washer 33 to form a treble magnetic gap, and the bottom surface of the annular external magnetic steel 31 is connected to the top of the flange 11;

[0039] A tweeter unit 4, the tweeter unit 4 comprises a tweeter diaphragm 41, a tweeter middle sticker 42 and a tweeter voice coil 43, the tweeter diaphragm 41 and the tweeter middle sticker 42 are respectively in the shape of a ring frame, the inner edge of the tweeter diaphragm 41 is connected to the tweeter middle sticker 42 and the tweeter voice coil 43, the outer edge of the tweeter diaphragm 41 is connected to the annular outer washer 33, and the tweeter voice coil 43 moves in the tweeter magnetic gap;

[0040] The bass unit 5 includes a bass middle sticker 52, a bass voice coil 53 and a bass diaphragm 51 respectively connected to the bass middle sticker 52, the bass voice coil 53 and the treble middle sticker 42, and the bass voice coil 53 moves in the bass magnetic gap.

[0041] From the above description, it can be seen that the beneficial effect of the utility model is that the micro speaker has a novel structure and has both a tweeter unit 4 and a woofer unit 5, which is conducive to optimizing the space occupied by the whole machine, conforming to the development trend of thin and light electronic equipment, and meeting the high requirements of users for the sound quality of the electroacoustic converter. The tweeter magnetic gap is directly arranged on the annular outer magnetic steel 31, which is conducive to simplifying the magnetic circuit of the micro speaker, reducing the number of magnetic steels used to facilitate the assembly and manufacturing of the micro speaker, thereby reducing the manufacturing cost of the micro speaker.

[0042] Furthermore, the polarity of the annular outer magnetic steel 31 region on one side of the tweeter magnetic gap is an N pole, and the polarity of the annular outer magnetic steel 31 region on the other side of the tweeter magnetic gap is an S pole.

[0043] Furthermore, it also includes a supporting component 6 , the inner side of the supporting component 6 is connected to the bass voice coil 53 , and the outer side of the supporting component 6 is connected to the flange 11 and / or the annular outer magnetic steel 31 .

[0044] As can be seen from the above description, the setting of the support component 6 can improve the rolling vibration and polarization phenomenon of the bass voice coil 53, which is beneficial to improving the acoustic performance of the micro speaker. The setting of the support component 6 can also concentrate the main support of the vibration system on the support component 6, so that the bass diaphragm 51 can use a softer material, so that the micro speaker is not affected by the bass diaphragm 51 when the high-pitched sound is produced, which is beneficial to improving the high-pitched performance of the micro speaker.

[0045] Furthermore, the supporting component 6 is a secondary membrane and / or a centering support sheet.

[0046] It can be seen from the above description that the specific structure of the support assembly 6 can be selected according to needs.

[0047] Furthermore, the supporting assembly 6 is in the shape of a ring frame as a whole.

[0048] It can be seen from the above description that the support assembly 6 which is in the shape of a ring frame as a whole can provide more stable and balanced support for the bass voice coil 53 .

[0049] Furthermore, it also includes a bracket 7, which is in the shape of a ring frame as a whole, the outer wall surface of the flange 11 is connected to the bracket 7, and the top surface of the bracket 7 is connected to the bottom surface of the annular outer magnetic steel 31.

[0050] From the above description, it can be seen that the existence of the bracket 7 can facilitate the positioning and installation of the yoke 1 and the annular magnetic steel, which is conducive to improving the production consistency of the micro speaker. At the same time, the bracket 7 can also protect the annular outer magnetic steel 31 to prevent the annular outer magnetic steel 31 from being damaged due to impact from below.

[0051] Furthermore, a first positioning structure is provided on the annular outer magnetic steel 31 , and a second positioning structure cooperating with the first positioning structure is provided on the bracket 7 .

[0052] It can be seen from the above description that the existence of the first positioning structure and the second positioning structure facilitates the precise positioning of the annular outer magnetic steel 31 and the bracket 7 .

[0053] Further, the first positioning structure is a positioning hole 312 , and the second positioning structure is a positioning column 71 ; or, the first positioning structure is a positioning column 71 , and the second positioning structure is a positioning hole 312 .

[0054] It can be seen from the above description that the first positioning structure / the second positioning structure is simple in structure and easy to manufacture. At the same time, it is beneficial to increase the adhesive connection between the annular outer magnetic steel 31 and the bracket 7, thereby improving the overall structural stability of the micro speaker.

[0055] Furthermore, the central magnetic structure 2 includes a central magnetic steel 21 and a central washer 22 , the top surface of the central magnetic steel 21 is connected to the central washer 22 , the bottom surface of the central magnetic steel 21 is connected to the yoke 1 , and the bottom surface of the central magnetic steel 21 is set lower than the bottom surface of the annular outer magnetic steel 31 .

[0056] It can be seen from the above description that the polarity of the bottom magnetic pole of the central magnetic steel 21 is the same as the polarity of the magnetic pole of the end of the annular outer magnetic steel 31 close to the central magnetic structure 2 .

[0057] Embodiment 1

[0058] Please refer to Figures 1 to 4 , Embodiment 1 of the present utility model is: a miniature speaker that can be applied to electronic products such as mobile phones, tablet computers, smart watches, etc.

[0059] The micro-speaker comprises a yoke 1, a central magnetic structure 2, an external magnetic structure 3, a tweeter 4 and a woofer 5, wherein the yoke 1 has a flange 11, and the flange 11 is formed by bending a partial area of ​​the edge of the yoke 1, and the central magnetic structure 2 is arranged on the yoke 1; a bass magnetic gap is formed between the external magnetic structure 3 and the central magnetic structure 2, and the external magnetic structure 3 comprises an annular external magnetic steel 31 and an annular inner washer 32 and an annular outer washer 33 respectively connected to the top surface of the annular external magnetic steel 31, the annular inner washer 32 is located in the annular outer washer 33, and the top surface of the annular external magnetic steel 31 is provided with an annular receiving groove 311, and the annular receiving groove 311 connects the annular inner washer 32 and the annular outer washer 33 3 to form a tweeter magnetic gap, the bottom surface of the annular external magnetic steel 31 is connected to the top of the flange 11; the tweeter unit 4 includes a tweeter diaphragm 41, a tweeter middle sticker 42 and a tweeter voice coil 43, the tweeter diaphragm 41 and the tweeter middle sticker 42 are respectively in the shape of a ring frame, the inner edge of the tweeter diaphragm 41 is connected to the tweeter middle sticker 42 and the tweeter voice coil 43, the outer edge of the tweeter diaphragm 41 is connected to the annular external washer 33, and the tweeter voice coil 43 moves in the tweeter magnetic gap; the woofer unit 5 includes a bass middle sticker 52, a bass voice coil 53 and a bass diaphragm 51 respectively connected to the bass middle sticker 52, the bass voice coil 53 and the tweeter middle sticker 42, and the bass voice coil 53 moves in the bass magnetic gap.

[0060] It is easy to understand that the tweeter diaphragm 41 adopts a tweeter rigid diaphragm with high strength and low compliance; the material of the tweeter middle paste 42 can be high-density strength materials such as stainless steel and magnesium-aluminum alloy; the bass middle paste 52 uses a heavier bass dome, and its material can be bakelite, aluminum + PMI sandwich composite structure, etc.

[0061] The polarity of the annular outer magnetic steel 31 region on one side of the tweeter magnetic gap is an N pole, and the polarity of the annular outer magnetic steel 31 region on the other side of the tweeter magnetic gap is an S pole. In other words, when the end of the annular outer magnetic steel 31 close to the central magnetic structure 2 is an N pole, the annular outer magnetic steel 31 region outside the tweeter magnetic gap is an S pole, and when the end of the annular outer magnetic steel 31 close to the central magnetic structure 2 is an S pole, the annular outer magnetic steel 31 region outside the tweeter magnetic gap is an N pole.

[0062] The micro speaker also includes a supporting component 6, the inner side of the supporting component 6 is connected to the bass coil 53, and the outer side of the supporting component 6 is connected to the flange 11 and / or the annular external magnetic steel 31. In this embodiment, the supporting component 6 is a centering support plate. In other embodiments, the supporting component 6 can be a secondary membrane, or a combination structure of a centering support plate and a secondary membrane, that is, the supporting component 6 is a secondary membrane and / or a centering support plate.

[0063] In this embodiment, the support assembly 6 is in the shape of a ring frame as a whole. In other embodiments, the number of the support assembly 6 can be multiple, and in this case, the multiple support assemblies 6 are symmetrically arranged.

[0064] The micro speaker also includes a bracket 7, which is in the shape of a ring frame as a whole. The outer wall surface of the flange 11 is connected to the bracket 7, and the top surface of the bracket 7 is connected to the bottom surface of the annular external magnetic steel 31. In order to keep the micro speaker light, the bracket 7 is preferably made of plastic, that is, the bracket 7 can be injection molded.

[0065] In order to facilitate the positioning and installation of the annular outer magnetic steel 31 and the bracket 7, a first positioning structure is provided on the annular outer magnetic steel 31, and a second positioning structure cooperating with the first positioning structure is provided on the bracket 7. In this embodiment, the first positioning structure is a positioning hole 312, and the second positioning structure is a positioning column 71; in other embodiments, the first positioning structure is a positioning column 71, and the second positioning structure is a positioning hole 312.

[0066] The central magnetic structure 2 includes a central magnetic steel 21 and a central washer 22 . The top surface of the central magnetic steel 21 is connected to the central washer 22 . The bottom surface of the central magnetic steel 21 is connected to the yoke 1 . The bottom surface of the central magnetic steel 21 is arranged lower than the bottom surface of the annular outer magnetic steel 31 .

[0067] In summary, the micro speaker provided by the utility model has a novel structure and has both a tweeter and a woofer, which is conducive to optimizing the space occupied by the whole machine, conforming to the development trend of thin and light electronic equipment, and meeting the high requirements of users for the sound quality of electroacoustic converters. The tweeter magnetic gap is directly arranged on the annular outer magnetic steel, which is conducive to simplifying the magnetic circuit of the micro speaker, reducing the number of magnetic steels used to facilitate the assembly and manufacturing of the micro speaker, thereby reducing the manufacturing cost of the micro speaker.

[0068] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A micro speaker, characterized in that: include A yoke, wherein the yoke has a flange; A central magnetic structure, wherein the central magnetic structure is disposed on the yoke; An external magnetic structure, wherein a bass magnetic gap is formed between the external magnetic structure and the central magnetic structure, the external magnetic structure comprises an annular external magnetic steel and an annular inner washer and an annular outer washer respectively connected to the top surface of the annular external magnetic steel, the annular inner washer is located inside the annular outer washer, an annular receiving groove is provided on the top surface of the annular external magnetic steel, the annular receiving groove communicates with the gap between the annular inner washer and the annular outer washer to form a treble magnetic gap, and the bottom surface of the annular external magnetic steel is connected to the top of the flange; A tweeter unit, the tweeter unit comprising a tweeter diaphragm, a tweeter middle sticker and a tweeter voice coil, the tweeter diaphragm and the tweeter middle sticker are respectively in the shape of a ring frame, the inner edge of the tweeter diaphragm is connected to the tweeter middle sticker and the tweeter voice coil, the outer edge of the tweeter diaphragm is connected to the annular outer washer, and the tweeter voice coil moves in the tweeter magnetic gap; A woofer unit comprises a woofer middle sticker, a woofer voice coil and a woofer diaphragm respectively connected to the woofer middle sticker, the woofer voice coil and the treble middle sticker, and the woofer voice coil moves in the woofer magnetic gap.

2. The micro-speaker according to claim 1, characterized in that: The polarity of the annular outer magnetic steel region on one side of the tweeter magnetic gap is an N pole, and the polarity of the annular outer magnetic steel region on the other side of the tweeter magnetic gap is an S pole.

3. The micro-speaker according to claim 1, characterized in that: It also includes a supporting component, the inner side of which is connected to the bass voice coil, and the outer side of which is connected to the flange and / or the annular external magnetic steel.

4. The micro-speaker according to claim 3, characterized in that: The supporting component is a secondary membrane and / or a centering support sheet.

5. The micro-speaker according to claim 3, characterized in that: The supporting assembly is in the shape of a ring frame as a whole.

6. The micro-speaker according to claim 1, characterized in that: It also includes a bracket, which is in the shape of a ring frame as a whole, the outer wall surface of the flange is connected to the bracket, and the top surface of the bracket is connected to the bottom surface of the annular outer magnetic steel.

7. The micro-speaker according to claim 6, characterized in that: The annular outer magnetic steel is provided with a first positioning structure, and the bracket is provided with a second positioning structure matched with the first positioning structure.

8. The micro-speaker according to claim 7, characterized in that: The first positioning structure is a positioning hole, and the second positioning structure is a positioning column; or, the first positioning structure is a positioning column, and the second positioning structure is a positioning hole.

9. The micro-speaker according to claim 1, characterized in that: The central magnetic structure includes a central magnetic steel and a central washer, the top surface of the central magnetic steel is connected to the central washer, the bottom surface of the central magnetic steel is connected to the yoke, and the bottom surface of the central magnetic steel is arranged lower than the bottom surface of the annular outer magnetic steel.

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