Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a voice diaphragm and two voice coils, the voice diaphragm comprises a body, two folding ring parts and two mounting parts, the length-width ratio of the body is greater than or equal to 2, the body is provided with two windows arranged side by side, and the mounting parts are positioned in the windows and are connected with the body through the folding ring parts; the two voice coils are symmetrically arranged, and the two voice coils are connected with the two mounting parts in a one-to-one correspondence manner. According to the miniature loudspeaker, a long-strip-shaped large-surface vibration system is transformed into a two-small-surface vibration system, when the miniature loudspeaker works, the offset of a single voice coil is smaller, the vibration of the miniature loudspeaker is more stable, the polarization phenomenon is also improved, the risk that the voice coils collide with the magnetic circuit assembly is reduced, noise is reduced, and the service life of the miniature loudspeaker is prolonged. And the audition experience is improved.

Description

Technical Field

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

[0002] Due to the overall structure of electronic products, the length-to-width ratio of the sound membrane of some low-frequency speakers is extremely large, reaching 2:1 or even 3:1, such as Figure 1 As shown, for a micro speaker with a large aspect ratio of the sound membrane 1, since the voice coil 2 is too long in the length direction, the polarization phenomenon of the voice coil 2 will be more obvious, and it will be easier for the voice coil 2 to rub against the magnetic circuit components, causing the micro speaker to emit noise and affect the listening effect. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a micro loudspeaker with a large aspect ratio that can improve polarization phenomenon.

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

[0005] A sound diaphragm, the sound diaphragm comprising a body, two folding rings, and two mounting portions, the body having an aspect ratio greater than or equal to 2, the body having two windows arranged side by side, the mounting portions being located within the windows and connected to the body via the folding rings;

[0006] Two voice coils are symmetrically arranged, and the two voice coils are connected to the two mounting parts in a one-to-one correspondence.

[0007] In one embodiment, the sound membrane has a symmetrical structure.

[0008] In one embodiment, a spherical top is provided on the mounting portion.

[0009] In one embodiment, the dome is located between the mounting portion and the voice coil, and the voice coil is indirectly connected to the mounting portion through the dome.

[0010] In one embodiment, the dome is located on a side of the mounting portion away from the voice coil.

[0011] In one embodiment, a window is provided in the central area of the mounting portion, and the spherical top closes the window.

[0012] In one embodiment, a basin frame and a magnetic circuit assembly are further included, wherein the magnetic circuit assembly includes a yoke and a central magnetic structure and a side magnetic structure respectively arranged on the yoke, the side magnetic structure is connected to the basin frame, and the number of the central magnetic structures is two groups, and the two groups of central magnetic structures are arranged in a one-to-one correspondence with the two voice coils.

[0013] In one embodiment, the magnetic poles of the two sets of central magnetic structures are oriented in opposite directions.

[0014] In one embodiment, the central magnetic structure includes a central magnetic steel and a central washer, and the central magnetic steel connects the yoke and the central washer.

[0015] In one embodiment, the number of the edge magnetic structures is multiple groups, and the multiple groups of edge magnetic structures are arranged in a ring frame shape. The edge magnetic structure includes edge magnetic steel and edge washers. The edge magnetic steel connects the edge washers and the yoke iron, and the edge washers are connected to the basin frame.

[0016] The beneficial effect of the present invention is that the micro-speaker transforms a long, large-surface vibration system into two small-surface vibration systems. When the micro-speaker is working, the offset of a single voice coil will be smaller, the vibration of the micro-speaker will be more stable, the polarization phenomenon will also be improved, and the risk of the voice coil rubbing against the magnetic circuit component will be reduced, which is conducive to reducing the generation of noise and improving the listening experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 A schematic diagram of a part of the structure of a micro speaker in the prior art;

[0019] Figure 2 This is a schematic structural diagram of a portion of the micro-speaker according to the first embodiment of the present invention.

[0020] Description of Figure Numbers:

[0021] 1. Sound diaphragm; 11. Main body; 12. Folding ring; 13. Mounting part; 14. Window; 15. Window opening;

[0022] 2. Voice coil;

[0023] 3. Top of the ball. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Example 1

[0031] Please refer to Figure 2, embodiment 1 of the present utility model is: a micro speaker, including a sound diaphragm 1 and two voice coils 2, the sound diaphragm 1 includes a body 11, two folding ring parts 12 and two mounting parts 13, the outer contour of the body 11 is rectangular as a whole, the aspect ratio of the body 11 is greater than or equal to 2, the body 11 has two windows 14 arranged side by side, the mounting part 13 is located in the windows 14 and is connected to the body 11 through the folding ring part 12 to achieve the closure of the windows 14; the two voice coils 2 are symmetrically arranged, and the two voice coils 2 are connected to the two mounting parts 13 in a one-to-one correspondence.

[0032] The body 11 forms a connecting portion between the two windows 14 . When the micro speaker vibrates, the connecting portion can play a supporting role to a certain extent, thereby improving the polarization phenomenon of the single voice coil 2 .

[0033] In order to facilitate processing and manufacturing and to ensure that the sound membrane 1 is subjected to force balance, the sound membrane 1 has a symmetrical structure.

[0034] The mounting portion 13 is provided with a dome 3. In this embodiment, the dome 3 is located on a side of the mounting portion 13 away from the voice coil 2. In other embodiments, the dome 3 is located between the mounting portion 13 and the voice coil 2, and the voice coil 2 is indirectly connected to the mounting portion 13 via the dome 3.

[0035] In order to reduce the total weight of the vibration system of the micro speaker and improve the sensitivity and loudness of the micro speaker, a window 15 is provided in the central area of the mounting portion 13 , and the dome 3 closes the window 15 .

[0036] The micro-speaker also includes a basin and a magnetic circuit assembly, the magnetic circuit assembly includes a yoke and a central magnetic structure and a side magnetic structure respectively arranged on the yoke, the side magnetic structure is connected to the basin, the number of the central magnetic structure is two groups, the two groups of the central magnetic structure are arranged in a one-to-one correspondence with the two voice coils 2, the magnetic poles of the two groups of the central magnetic structures are in opposite directions, the number of the side magnetic structures is multiple groups, and the multiple groups of the side magnetic structures are arranged in a ring frame shape.

[0037] The central magnetic structure includes a central magnetic steel and a central washer, and the central magnetic steel connects the yoke and the central washer; the side magnetic structure includes side magnetic steel and side washers, and the side magnetic steel connects the side washers and the yoke, and the side washers are connected to the basin frame.

[0038] 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 A sound diaphragm, the sound diaphragm comprising a body, two folding rings, and two mounting portions, the body having an aspect ratio greater than or equal to 2, the body having two windows arranged side by side, the mounting portions being located within the windows and connected to the body via the folding rings; Two voice coils are symmetrically arranged, and the two voice coils are connected to the two mounting parts in a one-to-one correspondence.

2. The micro-speaker according to claim 1, wherein: The sound membrane has a symmetrical structure.

3. The micro-speaker according to claim 1, wherein: A spherical top is provided on the mounting portion.

4. The micro-speaker according to claim 3, wherein: The dome is located between the mounting portion and the voice coil, and the voice coil is indirectly connected to the mounting portion through the dome.

5. The micro-speaker according to claim 3, wherein: The dome is located on a side of the mounting portion away from the voice coil.

6. The micro-speaker according to claim 3, wherein: A window is provided in the central area of the mounting portion, and the spherical top closes the window.

7. The micro-speaker according to claim 1, wherein: It also includes a basin and a magnetic circuit assembly, the magnetic circuit assembly includes a yoke and a central magnetic structure and a side magnetic structure respectively arranged on the yoke, the side magnetic structure is connected to the basin, the number of the central magnetic structure is two groups, and the two groups of central magnetic structures are arranged in a one-to-one correspondence with the two voice coils.

8. The micro-speaker according to claim 7, wherein: The magnetic poles of the two groups of central magnetic structures are oriented in opposite directions.

9. The micro-speaker according to claim 7, wherein: The central magnetic structure includes a central magnetic steel and a central washer, and the central magnetic steel connects the yoke and the central washer.

10. The micro-speaker according to claim 7, wherein: The number of the edge magnetic structures is multiple, and the multiple edge magnetic structures are arranged in a ring frame shape. The edge magnetic structure includes edge magnetic steel and edge washers. The edge magnetic steel connects the edge washers and the yoke iron, and the edge washers are connected to the basin frame.

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