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, a camera module and a motor module, the magnetic circuit assembly comprises a yoke, the yoke is provided with a plurality of central magnetic structures, the central magnetic structures are internally provided with installation cavities, and the yoke is provided with windows communicated with the installation cavities; a camera module is mounted in at least one mounting cavity, and the camera module is arranged corresponding to the window; and a motor module is mounted in at least one mounting cavity. According to the miniature loudspeaker, the camera module and the motor module are integrated, the vibration function, the sound production function and the shooting function are integrated, the occupation of components on the internal space of electronic equipment is greatly reduced, the stacking space of the whole machine is saved, the development requirement of lightening and thinning of the electronic equipment is met, and compared with a miniature loudspeaker with a single voice coil structure, the miniature loudspeaker has the advantages of being simple in structure and convenient to use. The miniature loudspeaker is of a multi-voice-coil structure, the acoustic performance of the miniature loudspeaker of the multi-voice-coil structure is better, and the user experience feeling is better.

Description

Technical Field

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

[0002] With the development of society, current electronic devices are becoming thinner and lighter, which poses an increasingly severe test to the stacking technology of the entire machine. Among them, vibration motors, cameras, and electro-acoustic devices are indispensable components in some electronic devices (such as mobile phones, tablets, etc.). These components need to occupy a lot of space inside the entire machine, and have gradually become a shackle on the thinness of electronic devices.

[0003] Therefore, it is necessary to integrate several components to make them conform to the development trend of lightweight electronic devices. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a micro speaker with both a vibration motor function and a camera function, and an electronic device with the micro speaker.

[0005] In order to solve the above technical problems, the first technical solution adopted by the utility model 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] A camera module, wherein the camera module is installed in at least one of the installation cavities, and the camera module is arranged corresponding to the window;

[0008] A motor module, wherein the motor module is installed in at least one of the installation cavities, the motor module comprising 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, the elastic member is connected to the magnetic circuit assembly, 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, a soldering pad is provided on the motor FPC, the soldering pad is electrically connected to the drive coil, and the soldering pad is exposed through the window.

[0009] 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 looking down at the magnetic circuit assembly, the mounting cavity is set corresponding to the central area of ​​the central magnetic steel.

[0010] In one embodiment, the height of the mounting cavity is less than the thickness of the central magnetic steel; or, the height of the mounting cavity is equal to the thickness of the central magnetic steel; or, 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.

[0011] In one embodiment, a sealant is provided at the gap between the window and the camera module.

[0012] In one embodiment, a bottom surface of the mass block is provided with an avoidance groove for avoiding the driving coil.

[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 is two, the mass block has two mounting through holes, the two motor magnets correspond to the two mounting through holes one by one, 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 assembly, the magnetic circuit assembly and the vibration assembly are respectively connected to the basin frame, the vibration assembly includes a sound membrane assembly and a plurality of voice coils arranged on the sound membrane assembly, the voice coils are arranged in a one-to-one correspondence with the central magnetic structure; the outer wall surfaces of two adjacent voice coils close to each other are fixedly connected.

[0017] 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.

[0018] The beneficial effects of the present invention are as follows: the micro speaker integrates a camera module and a motor module, realizing the three-in-one function of vibration, sound and shooting, greatly reducing the internal space occupied by components of electronic devices, which is conducive to saving the stacking space of the whole machine and meeting the development needs of thin and light electronic devices. Moreover, compared with the micro speaker with a single voice coil structure, the micro speaker has a multi-voice coil structure, and the micro speaker with a multi-voice coil structure has better acoustic performance and a better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] 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;

[0021] Figure 2 It is a structural schematic diagram of a part of the structure of the micro speaker of the first embodiment of the utility model;

[0022] Figure 3 A cross-sectional view of the micro-speaker of the first embodiment of the utility model Figure 1 ;

[0023] Figure 4 A cross-sectional view of the micro-speaker of the first embodiment of the utility model Figure 2 ;

[0024] Figure 5 A cross-sectional view of the micro-speaker of the first embodiment of the utility model Figure 3 .

[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. Camera module; 41. Base.

[0030] 5. Motor module; 51. Mass block; 511. Avoidance groove; 512. Mounting groove; 52. Motor magnet; 53. Elastic part; 54. Driving coil; 55. Motor FPC; 56. Magnetic plate. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Embodiment 1

[0038] Please refer to Figures 1 to 5 , 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, etc., wherein the electronic device is equipped with a micro speaker.

[0039] The micro speaker includes a basin frame 3, a vibration component 2, a magnetic circuit component 1, a camera module 4 and a motor module 5, 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 a plurality of voice coils 22 arranged on the sound membrane component 21, the sound membrane component 21 is connected to the basin frame 3, and the voice coil 22 is located in the basin frame 3; the magnetic circuit component 1 has a magnetic gap for the voice coil 22 to move, the magnetic circuit component 1 includes a yoke 11, a plurality of central magnetic structures 12 are arranged on the yoke 11, the number of the voice coils 22 is equal to the number of the central magnetic structures 12 and the two are arranged in a one-to-one correspondence, 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 window 111 is connected to the external space, it is easy to understand that the number of the windows 111 is multiple, the window The opening 111 is connected to the installation cavity 121 in a one-to-one correspondence; the camera module 4 is installed in at least one of the installation cavities 121, and the camera module 4 is arranged corresponding to the window 111; the motor module 5 is installed in at least one of the installation cavities 121, and the motor module 5 includes a mass block 51, a motor magnet 52, an elastic member 53, a drive coil 54 and a motor FPC55, and the two ends of the mass block 51 are respectively connected to the elastic member 53, and the elastic member 53 is connected to the magnetic circuit component 1, the motor magnet 52 is arranged on the mass block 51, and the drive coil 54 is arranged on the motor FPC55 and corresponds to the motor magnet 52. The motor FPC55 is arranged on the yoke 11 and closes the window 111, and a soldering pad is provided on the motor FPC55, and the soldering pad is electrically connected to the drive coil 54, and the soldering pad is exposed through the window 111.

[0040] In this embodiment, the yoke 11 has a bent flange 13, and the first part of the magnetic gap is formed between the flange 13 and the central magnetic structure 12, and the second part of the magnetic gap is formed between two adjacent central magnetic structures 12. The first part of the magnetic gap is connected to the second part of the magnetic gap to form an overall ring-shaped magnetic gap.

[0041] Specifically, 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, the top surface of the central magnetic steel is connected to the central washer, and the mounting cavity 121 is arranged corresponding to the central area of ​​the central magnetic steel when looking down at the magnetic circuit assembly 1. The middle part of the central magnetic steel provides less available magnetic flux, so the mounting cavity 121 is arranged corresponding to the central area of ​​the central magnetic steel, which can minimize the influence of the setting of the mounting cavity 121 on the acoustic performance of the micro speaker.

[0042] 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 arranged 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] Optionally, a part of the camera module 4 is exposed relative to the bottom surface of the yoke 11, so that the yoke 11 can prevent the camera module 4 from receiving external light. To prevent dust, water vapor, etc. from entering the installation cavity 121 through the window 111 to contaminate the camera module 4, preferably, a sealant is provided at the gap between the window 111 and the camera module 4. Of course, in actual products, it is also possible that the camera module 4 does not protrude relative to the bottom surface of the yoke 11.

[0044] In this embodiment, the camera module 4 includes a base 41, the top of the base 41 contacts the top surface of the installation cavity 121, the bottom of the base 41 contacts the yoke 11, and the surrounding walls of the base 41 contact the inner wall surfaces of the installation cavity 121 respectively, that is, the camera module 4 can be stably positioned and fixed in the installation cavity 121.

[0045] In this embodiment, the elastic member 53 is connected to the central magnetic structure 12 , and the elastic member 53 can be a reed or the like.

[0046] After the driving coil 54 is energized, it can drive the mass block 51 to move in the horizontal direction. The elastic member 53 suspends the mass block 51 in the installation cavity 121, and the elastic member 53 has elastic deformation in the horizontal direction. Specifically, when the motor module 5 is working, current is passed through the driving coil 54 to generate a magnetic field. The magnetic field force interacts with the magnetic field force of the motor magnet 52, which can drive the mass block 51 to move in the horizontal direction. During the movement, the mass block 51 drives the elastic member 53 to undergo elastic deformation. As a result, the mass block 51 moves back and forth under the action of the magnetic field force and the elastic force of the elastic member 53, thereby generating a vibration. Optionally, the mass block 51 can be a tungsten steel block, which can greatly enhance the vibration of the motor module 5.

[0047] In order to reduce the cross-sectional height of the micro speaker, preferably, the bottom surface of the mass block 51 is provided with an avoidance groove 511 for avoiding the driving coil 54 .

[0048] In detail, a mounting through hole for mounting the motor magnet 52 is provided on the mass block 51 , and a magnetic conductive plate 56 is provided on the top of the mass block 51 , and the magnetic conductive plate 56 covers the mounting through hole.

[0049] In order to ensure that the micro speaker is light and thin, a mounting groove 512 is provided on the top of the mass block 51 , and at least a part of the magnetic conductive plate 56 is located in the mounting groove 512 .

[0050] Optionally, the number of the motor magnets 52 is two, the mass block 51 has two mounting through holes, the two motor magnets 52 correspond to the two mounting through holes one by one, and preferably the magnetic conductive plate 56 covers the two mounting through holes at the same time.

[0051] To ensure the structural stability and acoustic performance of the micro speaker, preferably, 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. Of course, in actual products, it is also acceptable to have a gap between two adjacent voice coils 22.

[0052] 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; A camera module, wherein the camera module is installed in at least one of the installation cavities, and the camera module is arranged corresponding to the window; A motor module, wherein the motor module is installed in at least one of the installation cavities, the motor module comprising 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, the elastic member is connected to the magnetic circuit assembly, 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, a soldering pad is provided on the motor FPC, the soldering pad is electrically connected to the drive coil, and the soldering pad is exposed through the window.

2. 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, and the top surface of the central magnetic steel is connected to the central washer. Looking down at the magnetic circuit assembly, the installation cavity is set corresponding to the central area of ​​the central magnetic steel.

3. The micro-speaker according to claim 2, characterized in that: The height of the mounting cavity is less than the thickness of the central magnetic steel; or, the height of the mounting cavity is equal to the thickness of the central magnetic steel; or, 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.

4. The micro-speaker according to claim 1, characterized in that: A sealant is provided at the gap between the window and the camera module.

5. 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.

6. 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.

7. The micro-speaker according to claim 6, 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.

8. The micro-speaker according to claim 6, characterized in that: The number of the motor magnets is two, the mass block is provided with two mounting through holes, the two motor magnets correspond to the two mounting through holes one by one, and the magnetic conductive plate covers the two mounting through holes at the same time.

9. 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, the voice coils are arranged in a one-to-one correspondence with the central magnetic structure; 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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