Miniature loudspeaker and electronic equipment

Abstract

The utility model discloses a miniature loudspeaker and an electronic device, the miniature loudspeaker comprises a diaphragm, a dome, a voice coil and a first colloid, the diaphragm comprises an inner fixing part, and the central area of the inner fixing part is provided with a window; the ball top is arranged on the top surface of the inner fixing part and seals the window; a first gap is formed between the top surface of the voice coil and the bottom surface of the inner fixing part, the inner peripheral wall of the voice coil is arranged corresponding to the hollow area of the open window, and a first glue containing groove communicated with the first gap is defined by the wall surface of the open window, the bottom surface of the ball top and the top surface of the voice coil; the first glue body comprises a first gap filling part for filling the first gap and a first glue groove filling part for at least partially filling the first glue containing groove. According to the miniature loudspeaker, the first glue containing groove is defined by the inner peripheral wall of the open window of the vibrating diaphragm, the ball top and the voice coil to serve as the glue overflowing space, so that the magnetic circuit assembly does not need to be provided with an avoiding structure for avoiding glue overflowing on the inner side of the voice coil any more, the size of the magnetic circuit assembly is guaranteed, and therefore it is guaranteed that the miniature loudspeaker can achieve high performance.

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] Micro speakers, a device that can convert electrical energy into sound energy, are now widely used in microelectronic devices such as smart phones, portable camcorders, cameras and laptops. As users' demand for microelectronic devices increases, the performance requirements for micro speakers are also increasing.

[0003] In the related art, a micro-speaker generally includes a magnetic circuit component, a vibration component and a support component, wherein the vibration component includes a dome, a diaphragm and a voice coil. Currently, the voice coil is mostly directly bonded to the diaphragm with glue. In order to increase the fixing effect, the glue will overflow to both sides, that is, the inner and outer sides of the top of the voice coil will form overflow areas respectively. However, the overflowing glue will take up space. In order to avoid the collision between the glue and the magnetic circuit component under large amplitude power, the magnetic circuit component will be designed with chamfers and / or pressed edges corresponding to the overflowing glue area for avoidance. However, the setting of chamfers and pressed edges will reduce the volume of the magnetic circuit component, resulting in reduced performance of the micro-speaker. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a high-performance micro-speaker and an electronic device having 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 diaphragm, the diaphragm comprising an inner fixing portion, a central area of ​​the inner fixing portion being provided with a window;

[0007] A spherical top, which is arranged on the top surface of the inner fixing part and closes the window;

[0008] A voice coil, wherein a first gap is formed between the top surface of the voice coil and the bottom surface of the inner fixing portion, the inner peripheral wall of the voice coil is arranged corresponding to the hollow area of ​​the window, and the wall surface of the window, the bottom surface of the dome and the top surface of the voice coil enclose a first glue-containing groove communicating with the first gap;

[0009] The first colloid includes a first gap filling portion filling the first gap and a first glue groove filling portion at least partially filling the first glue groove.

[0010] In one embodiment, the first colloid further includes an overflow glue block located on the outer side wall of the voice coil, a notch connected to the first gap is formed on the outer side of the top of the voice coil, and the overflow glue block is located at the notch and connected to the first gap filling part.

[0011] In one embodiment, the first gap filling portion is connected to the first glue groove filling portion.

[0012] In one embodiment, the diaphragm further includes a reinforcing rib, wherein the reinforcing rib is disposed in the window, and both ends of the reinforcing rib are respectively connected to the internal fixing portion, and the number of the voice coils is a plurality arranged side by side, and the sides of two adjacent voice coils close to each other are fixed to the same reinforcing rib by a second colloid.

[0013] In one embodiment, a second gap is formed between the mutually adjacent sides of two adjacent voice coils and the bottom surface of the reinforcing rib, and the side surfaces of the reinforcing rib, the bottom surface of the ball top and the top surface of the voice coil enclose a second glue-containing groove connected to the second gap; the second colloid includes a second gap-filling portion filling the second gap and a second glue groove-filling portion at least partially filling the second glue-containing groove.

[0014] In one embodiment, the second glue containing grooves are provided on opposite sides of the reinforcing rib.

[0015] In one embodiment, the second gap filling portion is connected to the second glue groove filling portion.

[0016] In one embodiment, the second colloid further includes a connecting portion, and the connecting portion is located on the top surface of the reinforcing rib and connected to the spherical top.

[0017] In one embodiment, the connecting portion is connected to the second glue groove filling portion.

[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 inner peripheral wall of the window of the diaphragm in the micro-speaker, the dome and the voice coil enclose a first glue containing groove as a glue overflow space, so that the magnetic circuit component no longer needs to be provided with an avoidance structure for avoiding glue overflow from the inner side of the voice coil, which is beneficial to ensure the volume of the magnetic circuit component, thereby ensuring that the micro-speaker can achieve high performance. 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 is a cross-sectional view of the micro-speaker of the first embodiment of the utility model;

[0022] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0023] Figure 3 A cross-sectional view of a micro-speaker of another structure according to the first embodiment of the present utility model;

[0024] Figure 4 is a cross-sectional view of a micro-speaker according to Embodiment 2 of the present utility model;

[0025] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0026] Description of Figure Numbers:

[0027] 1. Basin stand;

[0028] 2. Magnetic circuit components;

[0029] 3. Diaphragm; 31. Internal fixing part; 32. Folding ring part; 33. External fixing part; 34. Window; 35. Reinforcement rib;

[0030] 4. Ball top;

[0031] 5. Voice coil; 51. Notch;

[0032] 6. first colloid; 61. first gap filling part; 62. first glue groove filling part; 63. overflow glue block;

[0033] 7. Second colloid; 71. Second gap filling part; 72. Second glue groove filling part; 73. Connecting part. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Embodiment 1

[0041] Please refer to Figures 1 to 3 , Embodiment 1 of the present utility model is: an electronic device, including but not limited to a mobile phone, a smart watch, a computer, etc., wherein the electronic device has a micro speaker, so as to realize a sound playback function.

[0042] like Figure 1 and Figure 2As shown, the micro speaker includes a basin frame 1 and a vibration component and a magnetic circuit component 2 respectively connected to the basin frame 1, the vibration component includes a diaphragm 3, a dome 4 and a voice coil 5, the magnetic circuit component 2 has a magnetic gap for the voice coil 5 to move, the diaphragm 3 includes an inner fixing portion 31, a folding ring portion 32 and an outer fixing portion 33 connected in sequence from the inside to the outside, the outer fixing portion 33 is connected to the basin frame 1, a window 34 is provided in the central area of ​​the inner fixing portion 31, the dome 4 is provided on the top surface of the inner fixing portion 31 and closes the window 34, the voice coil 5 is located in the inner fixing portion Below the inner fixing portion 31, a first gap is formed between the top surface of the voice coil 5 and the bottom surface of the inner fixing portion 31, and the inner circumferential wall of the voice coil 5 is arranged corresponding to the hollow area of ​​the window 34, and the wall surface of the window 34, the bottom surface of the ball top 4 and the top surface of the voice coil 5 enclose a first glue groove connected to the first gap; it also includes a first colloid 6, and the first colloid 6 includes a first gap filling portion 61 filling the first gap and a first glue groove filling portion 62 at least partially filling the first glue groove, and preferably the first gap filling portion 61 is connected to the first glue groove filling portion 62.

[0043] In this embodiment, the number of the voice coil 5 is one, and when the connected diaphragm 3 and voice coil 5 are viewed from above, the inner area of ​​the top surface of the voice coil 5 is visible, and the visible area of ​​the top surface of the voice coil 5 is integrated into a ring frame shape. It is easy to understand that the first glue groove filling portion 62 is not protruding from the inner peripheral wall of the voice coil 5, that is, when the vibration assembly is viewed from above, the first glue groove filling portion 62 is not visible.

[0044] To ensure the stability of the connection between the diaphragm 3 and the voice coil 5 , in this embodiment, the first colloid 6 further includes an overflow glue block 63 located on the outer side wall of the voice coil 5 .

[0045] like Figure 3 As shown, preferably, a notch 51 connected to the first gap is formed on the outer side of the top of the voice coil 5, and the overflow glue block 63 is located at the notch 51 and connected to the first gap filling portion 61. In this way, there is no need to set a avoidance structure corresponding to the overflow glue block 63 on the magnetic circuit component 2, which is conducive to further ensuring the volume of the magnetic circuit component 2 and improving the performance of the micro speaker.

[0046] Embodiment 2

[0047] Please refer to Figure 4 and Figure 5 The second embodiment of the present invention is a parallel technical solution of the first embodiment, and is different from the first embodiment in that: in this embodiment, the number of the voice coils 5 is multiple, and at this time, the multiple voice coils 5 are arranged side by side.

[0048] Specifically, the diaphragm 3 further includes a reinforcing rib 35, the reinforcing rib 35 is disposed in the window 34, both ends of the reinforcing rib 35 are respectively connected to the inner fixing portion 31, and the sides of two adjacent voice coils 5 close to each other are fixed to the same reinforcing rib 35 through the second colloid 7. Preferably, the reinforcing rib 35 and the inner fixing portion 31 are an integrated structure formed by integral processing.

[0049] It is easy to understand that there can be a gap or contact between the outer sides of the two adjacent voice coils 5 that are close to each other. Preferably, the outer sides of the two adjacent voice coils 5 that are close to each other are bonded and fixed, which can improve the split vibration phenomenon of the micro-speaker and help improve the structural stability and performance of the micro-speaker.

[0050] A second gap is formed between the sides of two adjacent voice coils 5 that are close to each other and the bottom surface of the reinforcing rib 35, and the side surfaces of the reinforcing rib 35, the bottom surface of the dome 4 and the top surface of the voice coil 5 enclose a second glue-containing groove that communicates with the second gap; the second colloid 7 includes a second gap-filling portion 71 that fills the second gap and a second glue-containing groove-filling portion 72 that at least partially fills the second glue-containing groove. It is easy to understand that the second glue-groove-filling portion 72 is not protruding from the inner circumferential wall of the voice coil 5, that is, when the vibration assembly is viewed from above, the second glue-groove-filling portion 72 is not visible.

[0051] Preferably, the second glue containing groove is provided on two opposite sides of the reinforcing rib 35 .

[0052] The second gap filling portion 71 is connected to the second glue groove filling portion 72 .

[0053] Optionally, the second colloid 7 further includes a connecting portion 73, which is located on the top surface of the reinforcing rib 35 and connected to the ball top 4. The existence of the connecting portion 73 can enhance the structural stability of the vibration component, and prevent the ball top 4 from colliding with the reinforcing rib 35 to generate noise, so that the performance of the micro speaker is affected.

[0054] As a preferred embodiment, the connecting portion 73 is connected to the second adhesive groove filling portion 72 . In this embodiment, the cross section of the second adhesive body 7 is in a ring frame shape, that is, at least a portion of the reinforcing rib 35 is covered by the second adhesive body 7 .

[0055] 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 diaphragm, the diaphragm comprising an inner fixing portion, a central area of ​​the inner fixing portion being provided with a window; A spherical top, which is arranged on the top surface of the inner fixing part and closes the window; A voice coil, wherein a first gap is formed between the top surface of the voice coil and the bottom surface of the inner fixing portion, the inner peripheral wall of the voice coil is arranged corresponding to the hollow area of ​​the window, and the wall surface of the window, the bottom surface of the dome and the top surface of the voice coil enclose a first glue-containing groove communicating with the first gap; The first colloid includes a first gap filling portion filling the first gap and a first glue groove filling portion at least partially filling the first glue groove.

2. The micro-speaker according to claim 1, characterized in that: The first colloid further includes an overflowing glue block located on the outer side wall of the voice coil, a notch connected to the first gap is formed on the outer side of the top of the voice coil, and the overflowing glue block is located at the notch and connected to the first gap filling part.

3. The micro-speaker according to claim 2, characterized in that: The first gap filling portion is connected to the first glue groove filling portion.

4. The micro-speaker according to claim 1, characterized in that: The diaphragm also includes a reinforcing rib, which is arranged in the window, and both ends of the reinforcing rib are respectively connected to the internal fixing part. The number of the voice coils is a plurality arranged side by side, and the sides of two adjacent voice coils close to each other are fixed to the same reinforcing rib through a second colloid.

5. The micro-speaker according to claim 4, characterized in that: A second gap is formed between the mutually approaching sides of two adjacent voice coils and the bottom surface of the reinforcing rib, and the side surfaces of the reinforcing rib, the bottom surface of the ball top and the top surface of the voice coil enclose a second glue-containing groove connected to the second gap; the second colloid includes a second gap-filling portion filling the second gap and a second glue groove-filling portion at least partially filling the second glue-containing groove.

6. The micro-speaker according to claim 5, characterized in that: The second glue containing grooves are formed on opposite sides of the reinforcing rib.

7. The micro-speaker according to claim 5, characterized in that: The second gap filling portion is connected to the second glue groove filling portion.

8. The micro-speaker according to claim 5, characterized in that: The second colloid further includes a connecting portion, which is located on the top surface of the reinforcing rib and connected to the spherical top.

9. The micro-speaker according to claim 8, characterized in that: The connecting portion is connected to the second glue groove filling portion.

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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