Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a yoke and vibration assemblies, the vibration assemblies are symmetrically arranged on two opposite sides of the yoke, each vibration assembly comprises a central magnetic structure, an outer magnetic structure, a high pitch unit and a low pitch unit, and 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 yoke. The miniature loudspeaker is novel and simple in structure, is provided with the two high-pitch units and the two low-pitch units at the same time, is high in device integration level, meets the high requirement of a user for the sound quality of an electroacoustic converter, and 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. Integrating the woofer and tweeter in the same micro speaker is a better solution, but this will make the overall structure of the micro speaker very complicated. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a micro speaker with simple structure and high integration.

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

[0006] yoke iron;

[0007] A vibration assembly is symmetrically arranged on two opposite sides of the yoke, and the vibration assembly includes

[0008] A central magnetic structure, wherein the central magnetic structure is disposed on the yoke;

[0009] 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 yoke;

[0010] 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;

[0011] 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.

[0012] 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.

[0013] Furthermore, the vibration assembly also includes a supporting assembly, the inner side of the supporting assembly is connected to the bass voice coil, and the outer side of the supporting assembly is connected to the annular external magnetic steel.

[0014] Furthermore, a notch is provided at the bottom of the annular outer magnetic steel, the notch is connected to the inner wall surface of the annular outer magnetic steel, and the connection between the support assembly and the annular outer magnetic steel is located in the notch.

[0015] Furthermore, the supporting assembly is in the shape of a ring frame as a whole.

[0016] Furthermore, the supporting component is a secondary membrane and / or a centering support piece.

[0017] Furthermore, a ventilation groove is provided on the yoke, and the ventilation groove is connected to the bass magnetic gaps on opposite sides of the yoke.

[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, and the bottom surface of the central magnetic steel is connected to the yoke.

[0019] Further, the woofers in the two vibration components work synchronously or asynchronously; and / or, the tweeter units in the two vibration components work synchronously or asynchronously.

[0020] Furthermore, the woofer in a single vibration assembly works synchronously or asynchronously with the tweeter.

[0021] The beneficial effects of the utility model are:

[0022] The micro speaker has a novel and simple structure, and has two tweeters and two woofers. It has a high degree of device integration, is conducive to optimizing the space occupied by the entire machine, conforms to the development trend of thinner and lighter electronic devices, and meets users' high requirements for the sound quality of electroacoustic converters.

[0023] The integrated structure of high and low frequencies can take into account both low and high frequencies, and the effective bandwidth can be made wider. The micro speaker can achieve high and low frequencies on both sides, doubling the sound loudness and providing better sound effects. At the same loudness, when working in reverse vibration mode, the amount of vibration can be reduced, allowing the micro speaker to remain light and thin.

[0024] 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

[0025] Figure 1 This is a schematic diagram of the structure of a micro speaker according to Embodiment 1 of the present utility model;

[0026] Figure 2 is a cross-sectional view of the micro-speaker of the first embodiment of the utility model;

[0027] Figure 3 It is a cross-sectional view of the micro-speaker of the first embodiment of the utility model from another perspective.

[0028] Description of labels:

[0029] 1. Yoke iron; 11. Ventilation groove;

[0030] 2. Center magnetic structure; 21. Center magnetic steel; 22. Center washer;

[0031] 3. External magnetic structure; 31. Annular external magnetic steel; 311. Annular receiving groove; 312. Notch; 32. Annular inner washer; 33. Annular outer washer;

[0032] 4. Tweeter unit; 41. Tweeter diaphragm; 42. Tweeter mid-strip; 43. Tweeter voice coil;

[0033] 5. Bass unit; 51. Bass diaphragm; 52. Bass center sticker; 53. Bass voice coil;

[0034] 6. Support components. DETAILED DESCRIPTION

[0035] 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.

[0036] Please refer to Figures 1 to 3 , a micro speaker, comprising:

[0037] Yoke 1;

[0038] Vibration components are symmetrically arranged on two opposite sides of the yoke 1, and the vibration components include

[0039] A central magnetic structure 2, wherein the central magnetic structure 2 is arranged on the yoke 1;

[0040] 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 yoke 1;

[0041] 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;

[0042] 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.

[0043] From the above description, it can be seen that the beneficial effect of the utility model is that the micro speaker has a novel and simple structure, and has two tweeters 4 and two woofers 5, and has a high degree of device integration, 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 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.

[0044] 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.

[0045] Furthermore, the vibration assembly also includes a supporting assembly 6 , the inner side of the supporting assembly 6 is connected to the bass voice coil 53 , and the outer side of the supporting assembly 6 is connected to the annular external magnetic steel 31 .

[0046] 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.

[0047] Furthermore, a notch 312 is provided at the bottom of the annular outer magnetic steel 31 , and the notch 312 is connected to the inner wall surface of the annular outer magnetic steel 31 . The connection between the support assembly 6 and the annular outer magnetic steel 31 is located in the notch 312 .

[0048] It can be seen from the above description that the setting of the notch 312 can provide sufficient installation position for the support component 6, and at the same time, it can also facilitate the positioning and assembly of the support component 6 and improve the production consistency of the micro speaker.

[0049] Furthermore, the supporting assembly 6 is in the shape of a ring frame as a whole.

[0050] 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 .

[0051] Furthermore, the supporting component 6 is a secondary membrane and / or a centering support sheet.

[0052] It can be seen from the above description that the specific structure of the support assembly 6 can be selected according to needs.

[0053] Furthermore, a ventilation groove 11 is provided on the yoke 1 , and the ventilation groove 11 connects the bass magnetic gaps on opposite sides of the yoke 1 .

[0054] It can be seen from the above description that the arrangement of the vent slot 11 enables the airflow inside the micro speaker to interact smoothly.

[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 , and the bottom surface of the central magnetic steel 21 is connected to the yoke 1 .

[0056] Further, the woofers 5 in the two vibration components work synchronously or asynchronously; and / or, the tweeter units 4 in the two vibration components work synchronously or asynchronously.

[0057] Furthermore, the woofer 5 in a single vibration assembly works synchronously or asynchronously with the tweeter 4 .

[0058] It can be seen from the above description that the micro speaker has various control modes and high flexibility in use.

[0059] Embodiment 1

[0060] Please refer to Figures 1 to 3 , 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.

[0061] The micro-speaker comprises a yoke 1 and a vibration component, wherein the vibration components are symmetrically arranged on two opposite sides of the yoke 1, and the vibration component comprises a central magnetic structure 2, an external magnetic structure 3, a tweeter 4 and a woofer 5, wherein the central magnetic structure 2 is arranged on the yoke 1, and a woofer 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, wherein the annular inner washer 32 is located in the annular outer washer 33, and an annular receiving groove 311 is arranged on the top surface of the annular external magnetic steel 31, wherein 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 outer magnetic steel 31 is connected to the yoke 1; 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 outer 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.

[0062] 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.

[0063] 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.

[0064] The vibration assembly also includes a supporting assembly 6, the inner side of the supporting assembly 6 is connected to the bass voice coil 53, and the outer side of the supporting assembly 6 is connected to the annular external magnetic steel 31. In this embodiment, the supporting assembly 6 is a centering support plate. In other embodiments, the supporting assembly 6 can be a secondary membrane, or a combination structure of a centering support plate and a secondary membrane, that is, the supporting assembly 6 is a secondary membrane and / or a centering support plate.

[0065] 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.

[0066] Preferably, a notch 312 is provided at the bottom of the annular outer magnetic steel 31, the notch 312 is connected to the inner wall surface of the annular outer magnetic steel 31, and the connection between the support assembly 6 and the annular outer magnetic steel 31 is located in the notch 312. In a specific product, when the annular outer magnetic steel 31 does not have the notch 312, the connection between the support assembly 6 and the annular outer magnetic steel 31 is located on the inner wall surface of the annular outer magnetic steel 31.

[0067] The yoke 1 is provided with a ventilation groove 11, and the ventilation groove 11 connects the bass magnetic gaps on opposite sides of the yoke 1. The number of the ventilation grooves 11 can be set as needed. In this embodiment, the number of the ventilation grooves 11 is four, and the ventilation grooves 11 are correspondingly provided on both sides of the central magnetic structure 2. The four ventilation grooves 11 are divided into two groups and are symmetrically arranged.

[0068] 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 , and the bottom surface of the central magnetic steel 21 is connected to the yoke 1 .

[0069] By adjusting the specific wiring mode, the woofers 5 in the two vibration components work synchronously or asynchronously; and / or the tweeter units 4 in the two vibration components work synchronously or asynchronously. The woofer 5 in a single vibration component works synchronously or asynchronously with the tweeter unit 4.

[0070] When powered on, the micro speaker amplifier can drive the woofer 5 and the tweeter 4 individually or simultaneously; when the vibration directions of the two vibration components are opposite, the effect of increasing the loudness of the high and low frequencies can be achieved.

[0071] In summary, the micro-speaker provided by the utility model has a novel and simple structure, and has two tweeters and two woofers at the same time. It has a high degree of device integration, is conducive to optimizing the space occupied by the whole machine, conforms to the development trend of lightweight electronic equipment, and meets the high requirements of users for the sound quality of electroacoustic converters. The integrated structure of high and low frequencies can take into account both low and high frequencies, and the effective bandwidth can be made wider. The micro-speaker can achieve high and low frequencies on both sides, and the sound loudness is doubled, and the sound effect is better. At the same loudness, when working in a reverse vibration mode, the vibration amount can be reduced so that the micro-speaker can remain lightweight. 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 and reducing the number of magnetic steels used to facilitate the assembly and manufacture of the micro-speaker, thereby reducing the manufacturing cost of the micro-speaker.

[0072] 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 yoke iron; A vibration assembly is symmetrically arranged on two opposite sides of the yoke, and the vibration assembly includes 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 yoke; 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: The vibration component 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 annular external magnetic steel.

4. The micro-speaker according to claim 3, characterized in that: A notch is provided at the bottom of the annular outer magnetic steel, the notch is connected to the inner wall surface of the annular outer magnetic steel, and the connection between the support assembly and the annular outer magnetic steel is located in the notch.

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 3, characterized in that: The supporting component is a secondary membrane and / or a centering support sheet.

7. The micro-speaker according to claim 1, characterized in that: The yoke is provided with a ventilation groove, and the ventilation groove is connected to the bass magnetic gaps on opposite sides of the yoke.

8. 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, and the bottom surface of the central magnetic steel is connected to the yoke.

9. The micro-speaker according to claim 1, characterized in that: The woofers in the two vibration components work synchronously or asynchronously; and / or, the tweeter units in the two vibration components work synchronously or asynchronously.

10. The micro-speaker according to claim 1, characterized in that: The woofer in a single vibration assembly works synchronously or asynchronously with the tweeter.

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