Miniature loudspeaker and electronic equipment

Abstract

The utility model discloses a miniature loudspeaker and an electronic device, the miniature loudspeaker comprises a magnetic circuit assembly and a plurality of motor modules, the magnetic circuit assembly comprises a yoke, the yoke is provided with a plurality of central magnetic structures, the interior of each central magnetic structure is provided with an installation cavity, and the yoke is provided with a window communicated with the installation cavity; the motor module is installed in the installation cavity and comprises a mass block, motor magnetic steel, elastic pieces, a driving coil and a motor FPC, the two ends of the mass block are connected with the elastic pieces respectively, the elastic pieces are connected with the magnetic circuit assembly, the motor magnetic steel is arranged on the mass block, the driving coil is arranged on the motor FPC and corresponds to the motor magnetic steel, and the motor FPC is arranged on the yoke and seals the window. The miniature loudspeaker is good in acoustic performance, at least two motor modules are arranged in the miniature loudspeaker, each motor module is provided with a motor FPC used for conducting electricity, the multiple motors can be started independently and can act synchronously so as to enhance the vibration sense, and the use experience of a user can be improved.

Description

Technical Field

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

[0002] In traditional design solutions, the performance improvement of speakers and motors is generally achieved by increasing the size of the product. However, as the internal space of electronic devices becomes more and more compact, the space occupied by batteries, motherboards, and cameras is getting larger and larger. This requires that the size of micro speakers and vibration motors cannot be increased or even reduced. This conflicts with the demand for performance improvement of both. To alleviate this conflict, the prior art has introduced a technical solution for integrating vibration motors into micro speakers, such as the Chinese utility model patent with application number 202023171977.X.

[0003] However, when trial-producing samples, it was found that the existing micro speakers with vibration motor function had insufficient vibration sensation, and the acoustic performance of the micro speakers was also unsatisfactory. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a high-performance micro-speaker with strong vibration feeling, and an electronic device with the micro-speaker.

[0005] In order to solve the above technical problems, the first technical solution adopted by the present invention is: a micro speaker, comprising:

[0006] A magnetic circuit assembly, the magnetic circuit assembly comprising a yoke, a plurality of central magnetic structures being provided on the yoke, a mounting cavity being provided inside the central magnetic structure, and a window being provided on the yoke and communicating with the mounting cavity;

[0007] Multiple motor modules are installed in the installation cavity, and the motor module includes a mass block, a motor magnet, an elastic member, a drive coil and a motor FPC. The two ends of the mass block are respectively connected to the elastic members, and the elastic member is connected to the magnetic circuit component. The motor magnet is arranged on the mass block, the drive coil is arranged on the motor FPC and corresponds to the motor magnet. The motor FPC is arranged on the yoke and closes the window.

[0008] In one embodiment, a soldering pad is provided on the motor FPC, the soldering pad is electrically connected to the driving coil, and the soldering pad is exposed through the window.

[0009] In one embodiment, a bottom surface of the mass block is provided with an avoidance groove for avoiding the driving coil.

[0010] In one embodiment, the central magnetic structure includes a central magnetic steel and a central washer, the bottom surface of the central magnetic steel is connected to the yoke, the top surface of the central magnetic steel is connected to the central washer, and the height of the mounting cavity is less than the thickness of the central magnetic steel;

[0011] Alternatively, the height of the mounting cavity is equal to the thickness of the central magnetic steel;

[0012] Alternatively, the height of the mounting cavity is greater than the thickness of the central magnetic steel, and less than the sum of the thickness of the central magnetic steel and the thickness of the central washer.

[0013] In one embodiment, a mounting through hole for mounting the motor magnet is provided on the mass block, and a magnetic conductive plate is provided on the top of the mass block, and the magnetic conductive plate covers the mounting through hole.

[0014] In one embodiment, a mounting groove is provided on the top of the mass block, and at least a portion of the magnetic conductive plate is located in the mounting groove.

[0015] In one embodiment, the number of the motor magnets in a single motor module is two, the mass block has two mounting through holes, the two motor magnets correspond one-to-one to the two mounting through holes, and the magnetic conductive plate covers the two mounting through holes at the same time.

[0016] In one embodiment, it also includes a basin frame and a vibration component, the magnetic circuit component and the vibration component are respectively connected to the basin frame, the vibration component includes a sound membrane component and a plurality of voice coils arranged on the sound membrane component, and the voice coils are arranged in a one-to-one correspondence with the central magnetic structure.

[0017] In one embodiment, outer wall surfaces of two adjacent voice coils that are close to each other are fixedly connected.

[0018] In order to solve the above technical problem, the second technical solution adopted by the present invention is: an electronic device, including the above micro speaker.

[0019] The beneficial effect of the utility model is that the micro speaker has a multi-voice coil structure, and compared with the micro speaker with a single voice coil structure, the micro speaker with a multi-voice coil structure has better acoustic performance. At the same time, the micro speaker has at least two motor modules built in, and each motor module has a motor FPC for conducting electricity. Therefore, multiple motors can be turned on individually or synchronously to enhance the vibration sense, which is conducive to improving the user experience. Moreover, the micro speaker has a compact structure and can well meet the development trend of thin and light electronic equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the overall structure of the micro-speaker according to the first embodiment of the present utility model;

[0022] Figure 2 A cross-sectional view of the micro-speaker of the first embodiment of the utility model Figure 1 ;

[0023] Figure 3 A cross-sectional view of the micro-speaker of the first embodiment of the utility model Figure 2 ;

[0024] Figure 4 It is a structural schematic diagram of a part of the structure of the micro speaker according to the first embodiment of the utility model.

[0025] Description of Figure Numbers:

[0026] 1. Magnetic circuit assembly; 11. Yoke; 111. Window; 12. Central magnetic structure; 121. Installation cavity; 13. Flanging;

[0027] 2. Vibration assembly; 21. Sound membrane assembly; 22. Voice coil;

[0028] 3. Basin rack;

[0029] 4. Motor module; 41. Mass block; 411. Avoidance groove; 412. Mounting groove; 42. Motor magnet; 43. Elastic part; 44. Driving coil; 45. Motor FPC; 46. Magnetic plate. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Embodiment 1

[0037] Please refer to Figures 1 to 4 , Embodiment 1 of the present utility model is: an electronic device, including but not limited to a mobile phone, a tablet computer, a smart watch, a game controller, etc., wherein the electronic device is equipped with a micro speaker.

[0038] The micro speaker includes a magnetic circuit component 1, a vibration component 2, a basin frame 3 and multiple motor modules 4, the magnetic circuit component 1 and the vibration component 2 are respectively connected to the basin frame 3, the vibration component 2 includes a sound membrane component 21 and multiple voice coils 22 arranged on the sound membrane component 21; the magnetic circuit component 1 includes a yoke 11, the yoke 11 is provided with multiple central magnetic structures 12, the voice coils 22 are arranged in a one-to-one correspondence with the central magnetic structure 12, specifically, the central magnetic structure 12 is arranged corresponding to the hollow area of ​​the voice coil 22, the interior of the central magnetic structure 12 is provided with an installation cavity 121, the yoke 11 is provided with a window 111 connected to the installation cavity 121, the edge of the yoke 11 is provided with a flange 13 or a side magnetic structure, the flange 13 is formed by bending a partial area of ​​the yoke 11, and the side magnetic structure includes side magnetic steel and The side washer, the side magnet connects the yoke 11 and the side washer, the side washer and / or the flange 13 are connected to the basin frame 3; the motor module 4 is installed in the installation cavity 121, the motor module 4 includes a mass block 41, a motor magnet 42, an elastic member 43, a drive coil 44 and a motor FPC45, the two ends of the mass block 41 are respectively connected to the elastic member 43, the elastic member 43 is connected to the magnetic circuit assembly 1, the motor magnet 42 is arranged on the mass block 41, the drive coil 44 is arranged on the motor FPC45 and corresponds to the motor magnet 42, the motor FPC45 is arranged on the yoke 11 and closes the window 111, in detail, a soldering pad is provided on the motor FPC45, the soldering pad is electrically connected to the drive coil 44, and the soldering pad is exposed through the window 111.

[0039] In this embodiment, the elastic member 43 is connected to the central magnetic structure 12 , and the elastic member 43 may be a spring leaf, etc. There are a plurality of windows 111 , and the windows 111 are connected to the installation cavities 121 in a one-to-one correspondence.

[0040] After the driving coil 44 is energized, it can drive the mass block 41 to move in the horizontal direction. The elastic member 43 suspends the mass block 41 in the installation cavity 121, and the elastic member 43 has elastic deformation in the horizontal direction. Specifically, when the motor module 4 is working, current is passed through the driving coil 44 to generate a magnetic field. The magnetic field force interacts with the magnetic field force of the motor magnet 42, which can drive the mass block 41 to move in the horizontal direction. During the movement, the mass block 41 drives the elastic member 43 to undergo elastic deformation. As a result, the mass block 41 moves back and forth under the action of the magnetic field force and the elastic force of the elastic member 43, thereby generating a vibration. Optionally, the mass block 41 can be a tungsten steel block, which can greatly enhance the vibration of the motor module 4.

[0041] In order to reduce the cross-sectional height of the micro speaker, preferably, the bottom surface of the mass block 41 is provided with an escape groove 411 for evading the driving coil 44 .

[0042] The central magnetic structure 12 includes a central magnetic steel and a central washer. The bottom surface of the central magnetic steel is connected to the yoke 11, and the top surface of the central magnetic steel is connected to the central washer. In this embodiment, the height of the mounting cavity 121 is equal to the thickness of the central magnetic steel. In other embodiments, the height of the mounting cavity 121 may be greater than the thickness of the central magnetic steel or less than the thickness of the central magnetic steel. When the height of the mounting cavity 121 is greater than the thickness of the central magnetic steel, a partial area of ​​the mounting cavity 121 is provided on the central washer and a blind groove is formed on the central washer; when the height of the mounting cavity 121 is less than the thickness of the central magnetic steel, the mounting cavity 121 is a non-through hole structure on the central magnetic steel.

[0043] The mass block 41 is provided with a mounting through hole for mounting the motor magnet 42 , and a magnetic conductive plate 46 is provided on the top of the mass block 41 , and the magnetic conductive plate 46 covers the mounting through hole.

[0044] In order to ensure that the micro speaker is light and thin, a mounting groove 412 is provided on the top of the mass block 41 , and at least a part of the magnetic conductive plate 46 is located in the mounting groove 412 .

[0045] Optionally, the number of the motor magnets 42 in a single motor module 4 is two, the mass block 41 has two mounting holes, the two motor magnets 42 correspond one-to-one to the two mounting holes, and the magnetic conductive plate 46 preferably covers the two mounting holes at the same time.

[0046] In order to improve the structural stability of the micro speaker, the outer wall surfaces of two adjacent voice coils 22 close to each other are fixedly connected, and the fixed connection method includes but is not limited to adhesive connection.

[0047] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A micro speaker, characterized in that: include A magnetic circuit assembly, the magnetic circuit assembly comprising a yoke, a plurality of central magnetic structures being provided on the yoke, a mounting cavity being provided inside the central magnetic structure, and a window being provided on the yoke and communicating with the mounting cavity; Multiple motor modules are installed in the installation cavity, and the motor module includes a mass block, a motor magnet, an elastic member, a drive coil and a motor FPC. The two ends of the mass block are respectively connected to the elastic members, and the elastic member is connected to the magnetic circuit component. The motor magnet is arranged on the mass block, the drive coil is arranged on the motor FPC and corresponds to the motor magnet. The motor FPC is arranged on the yoke and closes the window.

2. The micro-speaker according to claim 1, characterized in that: A soldering pad is provided on the motor FPC, the soldering pad is electrically connected to the driving coil, and the soldering pad is exposed through the window.

3. The micro-speaker according to claim 1, characterized in that: The bottom surface of the mass block is provided with an avoidance groove for avoiding the driving coil.

4. The micro-speaker according to claim 1, characterized in that: The central magnetic structure includes a central magnetic steel and a central washer, the bottom surface of the central magnetic steel is connected to the yoke, the top surface of the central magnetic steel is connected to the central washer, and the height of the mounting cavity is less than the thickness of the central magnetic steel; Alternatively, the height of the mounting cavity is equal to the thickness of the central magnetic steel; Alternatively, the height of the mounting cavity is greater than the thickness of the central magnetic steel and less than the sum of the thickness of the central magnetic steel and the thickness of the central washer.

5. The micro-speaker according to claim 1, characterized in that: The mass block is provided with a mounting through hole for mounting the motor magnet, and the top of the mass block is provided with a magnetic conductive plate, which covers the mounting through hole.

6. The micro-speaker according to claim 5, characterized in that: A mounting groove is provided on the top of the mass block, and at least a partial area of ​​the magnetic conductive plate is located in the mounting groove.

7. The micro-speaker according to claim 5, characterized in that: The number of the motor magnets in a single motor module is two, the mass block is provided with two mounting through holes, the two motor magnets correspond one to one with the two mounting through holes, and the magnetic conductive plate covers the two mounting through holes at the same time.

8. The micro-speaker according to claim 1, characterized in that: It also includes a basin frame and a vibration component, the magnetic circuit component and the vibration component are respectively connected to the basin frame, the vibration component includes a sound membrane component and a plurality of voice coils arranged on the sound membrane component, and the voice coils are arranged in a one-to-one correspondence with the central magnetic structure.

9. The micro-speaker according to claim 8, characterized in that: The outer wall surfaces of two adjacent voice coils close to each other are fixedly connected.

10. An electronic device, characterized in that: The micro-speaker comprises the micro-speaker as claimed in any one of claims 1 to 9.

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