Loudspeaker module

Abstract

The utility model discloses a loudspeaker module, which comprises a module shell and a loudspeaker monomer, and is characterized in that the inner surface of the module shell is provided with a first permanent magnet; the loudspeaker single body is installed in the module shell, the loudspeaker single body comprises a basin frame, a vibrating diaphragm assembly, a voice coil, a magnetic circuit assembly and an electromagnet assembly, and the vibrating diaphragm assembly is connected with the basin frame; the voice coil is connected with the diaphragm assembly. The magnetic circuit assembly is connected with the basin frame, the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, and the magnetic circuit assembly is provided with a magnetic gap for the voice coil to move; the electromagnet assembly is arranged on the side, close to the yoke, of the vibrating diaphragm assembly and corresponds to the central area of the central magnetic structure, and the electromagnet assembly comprises a second permanent magnet and a coil arranged around the second permanent magnet; the magnetic pole polarity of one end, close to the first permanent magnet, of the second permanent magnet is the same as the magnetic pole polarity of one end, close to the second permanent magnet, of the first permanent magnet. The loudspeaker module is large in driving force and can realize high performance.

Description

Technical Field

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

[0002] At present, dynamic sound units such as speakers drive the coil through electromagnetic force. The coil drives the diaphragm bonded to it to do reciprocating motion, thereby radiating sound waves outward. The driving force of the speaker comes from the Ampere force generated by the current-carrying wire in the voice coil cutting the magnetic lines of force. The area with dense magnetic lines of force in the conventional structure is the magnetic gap between the inner and outer washers.

[0003] For the center magnet, the edge area close to the voice coil has a great influence on the driving force, while the magnetic flux density generated in the middle area is not fully utilized, and the magnet efficiency cannot be further improved, which in turn makes it impossible to further improve the performance of the speaker module. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a high-performance speaker module with large driving force.

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

[0006] A module housing, wherein the inner surface of the module housing is provided with a first permanent magnet;

[0007] A speaker unit is installed in the module housing, and the speaker unit includes

[0008] basin stand;

[0009] A diaphragm assembly, wherein the diaphragm assembly is connected to the basin frame;

[0010] A voice coil connected to the diaphragm assembly;

[0011] A magnetic circuit assembly, the magnetic circuit assembly is connected to the basin frame, the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, and the magnetic circuit assembly has a magnetic gap for the voice coil to move;

[0012] An electromagnet assembly, the electromagnet assembly being arranged on a side of the diaphragm assembly close to the yoke and corresponding to a central area of ​​the central magnetic structure, the electromagnet assembly comprising a second permanent magnet and a coil arranged around the second permanent magnet;

[0013] The second permanent magnet is arranged corresponding to the first permanent magnet, the magnetic pole polarity of the second permanent magnet close to the first permanent magnet is the same as the magnetic pole polarity of the first permanent magnet close to the second permanent magnet, and the magnetic pole polarity of the second permanent magnet close to the first permanent magnet is the same as the magnetic pole polarity of the end of the central magnetic structure close to the diaphragm assembly.

[0014] In one embodiment, the diaphragm assembly includes a sound membrane and a middle sticker, the sound membrane includes an inner fixed part, a folded ring part and an outer fixed part which are sequentially connected from the inside to the outside, the outer fixed part is connected to the basin frame, the inner fixed part is provided with a window, the middle sticker is connected to the inner fixed part and closes the window, and the electromagnet assembly is arranged on the middle sticker.

[0015] In one embodiment, the middle sticker is located on a side of the inner fixing portion away from the yoke.

[0016] In one embodiment, the speaker unit further includes a frame, and the voice coil is indirectly connected to the diaphragm assembly through the frame.

[0017] In one embodiment, a top surface of the central magnetic structure is provided with an avoidance groove for avoiding the electromagnet assembly.

[0018] In one embodiment, the central magnetic structure includes a central magnetic steel and a central washer, the central magnetic steel connects the central washer and the yoke, and the avoidance groove connects the top surface and the bottom surface of the central washer.

[0019] In one embodiment, a portion of the avoidance groove is located on the central washer, and another portion is located on the central magnetic steel.

[0020] In one embodiment, a concave portion is provided in the central area of ​​the diaphragm assembly, the concave portion is arranged corresponding to the first permanent magnet, and the electromagnet assembly is arranged on the bottom surface of the concave portion.

[0021] In one embodiment, when the diaphragm assembly vibrates, the avoidance groove avoids the lower recessed portion.

[0022] In one embodiment, the speaker unit further includes a supporting component, wherein the supporting component connects the basin frame and the voice coil.

[0023] The beneficial effects of the present utility model are as follows: the structure of the speaker module is novel, an electromagnet assembly is added to the diaphragm assembly, and the direction of the magnetic pole of the electromagnet assembly can be changed by switching the direction of the current passed through the coil, thereby generating attraction or repulsion with the central magnetic structure. The sum of the force exerted on the electromagnet assembly and the Ampere force generated by the voice coil cutting the magnetic flux lines is the driving force of the speaker unit. In other words, the speaker unit is a hybrid driving structure of a dynamic coil and a moving iron, and its total driving force has been significantly improved, thereby further improving the performance of the speaker unit.

[0024] In the speaker unit, the electromagnet assembly located above the central area of ​​the central magnetic structure fully utilizes the magnetic flux generated in the middle area of ​​the central magnetic structure, effectively improving the electroacoustic conversion efficiency.

[0025] The setting of the first permanent magnet on the inner surface of the module shell can prevent the second permanent magnet from being attracted by the metal or external devices on the module shell when the power is not supplied, which is beneficial to maintaining the balanced and stable state of the diaphragm assembly. There is a repulsive force between the second permanent magnet in the speaker unit and the central magnetic structure. Therefore, the diaphragm assembly will not be attracted by the central magnetic structure when the power is not supplied. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 This is an exploded view of the speaker module of the first embodiment of the present utility model;

[0028] Figure 2 A cross-sectional view of a speaker module according to Embodiment 1 of the present utility model;

[0029] Figure 3 It is a cross-sectional view of the speaker module of the second embodiment of the present utility model.

[0030] Description of Figure Numbers:

[0031] 1. Basin stand;

[0032] 2. Sound film;

[0033] 3. Middle post; 31. Lower concave part;

[0034] 4. Voice coil;

[0035] 5. Magnetic circuit assembly; 51. Yoke iron; 52. Center magnetic structure; 521. Center magnetic steel; 522. Center washer; 53. Side magnetic structure; 531. Side magnetic steel; 532. Side washer; 54. Avoidance slot;

[0036] 6. Electromagnet assembly; 61. Second permanent magnet; 62. Coil;

[0037] 7. Skeleton;

[0038] 8. Centering support piece;

[0039] 9. Module housing;

[0040] 10. The first permanent magnet. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] Embodiment 1

[0048] Please refer to Figure 1 and Figure 2 , Embodiment 1 of the present utility model is: a loudspeaker module, comprising a module housing 9 and a loudspeaker unit arranged in the module housing 9, the inner surface of the module housing 9 is provided with a first permanent magnet 10, the loudspeaker unit comprises a basin frame 1, a diaphragm assembly, a voice coil 4, a magnetic circuit assembly 5 and an electromagnet assembly 6, the diaphragm assembly and the magnetic circuit assembly 5 are respectively connected to the basin frame 1, the voice coil 4 is located in the basin frame 1 and connected to the diaphragm assembly, the magnetic circuit assembly 5 comprises a yoke 51 and a central magnetic structure 52 and a side magnetic structure 53 respectively arranged on the yoke 51, the magnetic circuit assembly 5 has a magnetic gap for the movement of the voice coil 4, specifically, the central magnetic structure 52 is located between at least one group of two side magnetic structures 53 arranged oppositely, a magnetic gap for the movement of the voice coil 4 is formed between the central magnetic structure 52 and the side magnetic structure 53, and the side magnetic structure 53 is connected to the basin frame 1; the electromagnet assembly 6 is arranged on one side of the diaphragm assembly close to the yoke 51 and is arranged corresponding to the central area of ​​the central magnetic structure 52 The electromagnet assembly 6 includes a second permanent magnet 61 and a coil 62 arranged around the second permanent magnet 61. The second permanent magnet 61 is arranged corresponding to the first permanent magnet 10. The magnetic pole polarity of the end of the second permanent magnet 61 close to the first permanent magnet 10 is the same as the magnetic pole polarity of the end of the first permanent magnet 10 close to the second permanent magnet 61. The magnetic pole polarity of the end of the second permanent magnet 61 away from the first permanent magnet 10 is the same as the magnetic pole polarity of the end of the central magnetic structure 52 close to the diaphragm assembly. The polarity is the same, which can prevent the second permanent magnet 61 from being attracted by the central magnetic structure 52 when the coil 62 is not powered, so that the diaphragm assembly collapses. At the same time, the second permanent magnet 61 repels the first permanent magnet 10, which can prevent the second permanent magnet 61 from being attracted by the metal on the module housing 9 or parts in the electronic device when the coil 62 is not powered, so that the diaphragm assembly bulges outward. The first permanent magnet 10 can be selected from neodymium iron boron magnets, etc. Similarly, the second permanent magnet 61 can be selected from neodymium iron boron magnets, etc.

[0049] The central magnetic structure 52 includes a central magnetic steel 521 and a central washer 522, the central magnetic steel 521 connects the central washer 522 and the yoke 51, and the central washer 522 is located on the side of the central magnetic steel 521 away from the yoke 51, and the side magnetic structure 53 includes a side washer 532 and a side magnetic steel 531, the side magnetic steel 531 connects the yoke 51 and the side washer 532, and the side washer 532 is located on the side of the side magnetic steel 531 away from the yoke 51, and the side washer 532 is connected to the basin frame 1.

[0050] When the magnetic pole of the second permanent magnet 61 close to one end of the first permanent magnet 10 is the N pole, the magnetic pole of the first permanent magnet 10 close to one end of the second permanent magnet 61 is the N pole, the magnetic pole of the second permanent magnet 61 away from one end of the first permanent magnet 10 is the S pole, and the magnetic pole of the central magnetic structure 52 close to one end of the diaphragm assembly is the S pole; when the magnetic pole of the second permanent magnet 61 close to one end of the first permanent magnet 10 is the S pole, the magnetic pole of the first permanent magnet 10 close to one end of the second permanent magnet 61 is the S pole, the magnetic pole of the second permanent magnet 61 away from one end of the first permanent magnet 10 is the N pole, and the magnetic pole of the central magnetic structure 52 close to one end of the diaphragm assembly is the N pole.

[0051] Preferably, the top surface of the central magnetic structure 52 is provided with an avoidance groove 54 for avoiding the electromagnet assembly 6, so that the electromagnet assembly 6 can prevent the central magnetic structure 52 from accidentally colliding with the central magnetic structure 52 when the speaker unit is working. Further preferably, the avoidance groove 54 is connected to the top and bottom surfaces of the central washer 522, so that the central area of ​​the central magnetic steel 521 is not blocked by the central washer 522, so that the magnetic flux lines acting on the central magnetic steel 521 and the electromagnet assembly 6 can be more concentrated and dense, thereby improving the moving iron mechanism, and then increasing the total driving force of the speaker unit to a greater extent.

[0052] In other embodiments, it is also acceptable that a portion of the avoidance groove 54 is located on the central washer 522 and another portion is located on the central magnetic steel 521 .

[0053] In this embodiment, the diaphragm assembly includes a sound membrane 2 and a center sticker 3, the sound membrane 2 includes an inner fixed part, a folded ring part and an outer fixed part which are connected in sequence from the inside to the outside, the outer fixed part is connected to the basin frame 1, and a window is provided on the inner fixed part. The center sticker 3 is connected to the inner fixed part and closes the window, and the electromagnet assembly 6 is provided on the center sticker 3.

[0054] As a preferred embodiment, the center sticker 3 is located on the side of the inner fixed portion away from the yoke 51, which can increase the distance between the central magnetic structure 52 and the electromagnet assembly 6, so that the speaker unit can achieve a larger amplitude, thereby improving the performance of the speaker unit.

[0055] In order to allow the voice coil 4 to penetrate deeper into the magnetic gap, optionally, the speaker unit also includes a skeleton 7, and the voice coil 4 is indirectly connected to the diaphragm assembly through the skeleton 7. In this embodiment, the skeleton 7 is in the shape of a ring frame as a whole, which not only ensures the structural strength of the skeleton 7 itself, but also facilitates the assembly and manufacturing of the speaker unit.

[0056] In order to improve the polarization and rolling phenomena of the voice coil 4, the speaker unit further includes a supporting component, the supporting component connects the basin frame 1 and the voice coil 4, and the supporting component includes a centering support plate 8 and / or a secondary membrane.

[0057] Embodiment 2

[0058] Please refer to Figure 3 The second embodiment of the present invention is a further improvement on the first embodiment, specifically: a concave portion 31 is provided in the central area of ​​the diaphragm assembly, the concave portion 31 is provided corresponding to the first permanent magnet 10, and the electromagnet assembly 6 is provided on the bottom surface of the concave portion 31.

[0059] The arrangement of the lower concave portion 31 can prevent the arrangement of the first permanent magnet 10 from occupying the Z-axis space, thereby affecting the amplitude of the speaker unit. In this embodiment, the lower concave portion 31 is arranged on the middle sticker 3.

[0060] As a preferred embodiment, the recessed portion 31 corresponds to the avoidance groove 54, and the outer contour dimension of the horizontal cross-section of the recessed portion 31 is smaller than the contour dimension of the horizontal cross-section of the avoidance groove 54. That is to say, the avoidance groove 54 on the central magnetic structure 52 not only plays the role of avoiding the electromagnet assembly 6, but also plays the role of avoiding the recessed portion 31, so that when the diaphragm assembly vibrates, the avoidance groove 54 can avoid the recessed portion 31.

[0061] 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 speaker module, characterized in that: include A module housing, wherein the inner surface of the module housing is provided with a first permanent magnet; A speaker unit is installed in the module housing, and the speaker unit includes basin stand; A diaphragm assembly, wherein the diaphragm assembly is connected to the basin frame; A voice coil connected to the diaphragm assembly; A magnetic circuit assembly, the magnetic circuit assembly is connected to the basin frame, the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, and the magnetic circuit assembly has a magnetic gap for the voice coil to move; An electromagnet assembly, the electromagnet assembly being arranged on a side of the diaphragm assembly close to the yoke and corresponding to a central area of ​​the central magnetic structure, the electromagnet assembly comprising a second permanent magnet and a coil arranged around the second permanent magnet; The second permanent magnet is arranged corresponding to the first permanent magnet, the magnetic pole polarity of the second permanent magnet close to the first permanent magnet is the same as the magnetic pole polarity of the first permanent magnet close to the second permanent magnet, and the magnetic pole polarity of the second permanent magnet close to the first permanent magnet is the same as the magnetic pole polarity of the end of the central magnetic structure close to the diaphragm assembly.

2. The speaker module according to claim 1, characterized in that: The diaphragm assembly includes a sound membrane and a middle sticker. The sound membrane includes an inner fixed part, a folded ring part and an outer fixed part which are connected in sequence from the inside to the outside. The outer fixed part is connected to the basin frame. The inner fixed part is provided with a window. The middle sticker is connected to the inner fixed part and closes the window. The electromagnet assembly is arranged on the middle sticker.

3. The speaker module according to claim 2, characterized in that: The middle sticker is located at a side of the inner fixing portion away from the yoke.

4. The speaker module according to claim 1, characterized in that: The loudspeaker unit also includes a frame, and the voice coil is indirectly connected to the diaphragm assembly through the frame.

5. The speaker module according to claim 1, characterized in that: The top surface of the central magnetic structure is provided with an avoidance groove for avoiding the electromagnet assembly.

6. The speaker module according to claim 5, characterized in that: The central magnetic structure includes a central magnetic steel and a central washer, the central magnetic steel connects the central washer and the yoke, and the avoidance groove connects the top surface and the bottom surface of the central washer.

7. The speaker module according to claim 6, characterized in that: A portion of the avoidance groove is located on the central washer, and another portion is located on the central magnetic steel.

8. The speaker module according to claim 5, characterized in that: A concave portion is provided in the central area of ​​the diaphragm assembly, the concave portion is arranged corresponding to the first permanent magnet, and the electromagnet assembly is arranged on the bottom surface of the concave portion.

9. The speaker module according to claim 8, characterized in that: When the diaphragm assembly vibrates, the avoidance groove avoids the lower recessed portion.

10. The speaker module according to claim 1, characterized in that: The loudspeaker unit further comprises a supporting component, wherein the supporting component connects the basin frame and the voice coil.

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