Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a basin stand, a vibration assembly, a magnetic circuit assembly and a centering disk, and is characterized in that the vibration assembly comprises a voice coil and a diaphragm assembly connected with the voice coil and the basin stand; the magnetic circuit assembly comprises a yoke and an edge magnetic structure for connecting the yoke and the basin stand, and the edge magnetic structure is provided with an avoiding groove; the centering disk comprises an inner fixing part, a cantilever part and an outer fixing part which are sequentially connected from inside to outside, at least partial area of the cantilever part is located in the avoiding groove, the inner fixing part is electrically connected with the voice coil, the outer fixing part comprises an inner side part and a straight edge part which are vertically connected, and the inner side part is electrically connected with the straight edge part. The inner side part is located in the avoiding groove and is connected with the basin stand, and the straight edge part is located on the outer side of the basin stand and is connected with the basin stand. The sounding unit is small in structure, high in performance sensitivity and large in loudness.

Description

TECHNICAL FIELD

[0001] The utility model relates to electroacoustic transducer technical field especially relates to sounding unit. BACKGROUND

[0002] Sounding unit as a kind of device that can convert electric energy into sound energy, now widely applied to smart phone, camcorder, camera and notebook computer etc. Microelectronic device, with microelectronic device more and more miniaturization, sounding unit also more and more small.

[0003] However, sounding unit unit more and more miniaturization, it will lead to magnetic circuit assembly overall volume more miniaturization, lead to overall performance sensitivity deficiency, affect the performance sensitivity of miniature loudspeaker, thereby affect loudness. In the existing sounding unit, centering sheet will encroach more installation space, the position corresponding to the centering sheet of side magnetic steel needs to be avoided, especially, the top surface of outer fixed part is connected on the bottom surface of yoke, the lower of the outer fixed part of centering sheet is often vacant, if the area can be utilized, it will help the performance of sounding unit. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problems that provide a kind of performance sensitivity high miniaturization sounding unit.

[0005] In order to solve the above technical problem, the technical scheme that the utility model adopts is as follows: sounding unit, comprising:

[0006] Yoke;

[0007] Vibration assembly, the vibration assembly includes voice coil and connecting the voice coil and diaphragm assembly of the yoke;

[0008] Magnetic circuit assembly, the magnetic circuit assembly includes yoke and connecting the yoke and the yoke of side magnetic structure, the side magnetic structure has the avoidance slot;

[0009] Centering sheet, the centering sheet includes by inside sequentially connected from inside to outside inner fixed part, cantilever part and outer fixed part, at least part of the cantilever part is located in the avoidance slot, the inner fixed part is electrically connected with the voice coil, the outer fixed part includes vertically connected inner side and straight edge, the inner side is located in the avoidance slot and connects the yoke, the straight edge is located on the outside of the yoke and connects the yoke.

[0010] Further, the outer fixed part further includes lead-through part, the lead-through part is vertically connected with the straight edge, the lead-through part is located at the end of the straight edge, the lead-through part is located below the yoke and is fixed on the bottom surface of the yoke, the magnetic circuit assembly has the avoidance notch for avoiding the lead-through part.

[0011] Further, the bottom of the yoke has a lower protrusion, and the lower protrusion connects the inner side.

[0012] Further, the side magnetic structure comprises two concave magnetic structures arranged oppositely and symmetrically, and a gap between the two concave magnetic structures forms the avoiding slot.

[0013] Further, each of the concave magnetic structures comprises a concave Hua Si and two L-shaped magnetic steels, and the L-shaped magnetic steels connect the yoke and the concave Hua Si.

[0014] Further, the L-shaped magnetic steel in one of the concave magnetic structures is connected to the L-shaped magnetic steel in the other concave magnetic structure and symmetrically arranged with the L-shaped magnetic steel in the other concave magnetic structure through a connecting portion.

[0015] Further, the avoiding slot is located at the middle of the long side of the sound generating unit or the middle of the short side.

[0016] Further, the magnetic circuit assembly further comprises a center magnetic structure arranged on the yoke, the center magnetic structure corresponds to the hollow region of the voice coil, the number of the voice coils is two, the two voice coils are arranged side by side, and the gap between the two voice coils corresponds to the avoiding slot.

[0017] Further, the sound generating unit further comprises a conducting plate connected to the diaphragm assembly, the conducting plate is electrically connected to the two voice coils respectively, and the two voice coils are connected in series.

[0018] Further, the two voice coils are bonded to each other.

[0019] The sound generating unit has the advantages that: the sound generating unit has a novel structure, on the basis of not changing the overall volume of the sound generating unit, most of the outer fixed part of the centering sheet is migrated to the outside of the yoke, so that the space below the yoke can be occupied by the side magnetic steel, the side magnetic steel in the sound generating unit is expanded outward, the overall volume of the side magnetic steel is increased, the magnetic field strength of the sound generating unit is enhanced, the performance sensitivity and loudness of the sound generating unit are improved, and the performance of the sound generating unit is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an exploded view of the sound generating unit of the utility model embodiment one;

[0021] Figure 2 It is a structure schematic view of the overall structure of the sound generating unit of the utility model embodiment one;

[0022] Figure 3 It is a structure schematic view of part of the structure of the sound generating unit of the utility model embodiment one;

[0023] Figure 4 This is a structural diagram of part of the structure of the sound-emitting unit of the second embodiment of the present invention.

[0024] Description of labels:

[0025] 1. Basin frame; 11. Lower convex part;

[0026] 2. Vibration assembly; 21. Voice coil; 22. Diaphragm assembly;

[0027] 3. Magnetic circuit assembly; 31. Yoke; 32. Side magnetic structure; 321. Side washer; 322. Side magnet; 324. Concave magnetic structure; 3241. Concave washer; 3242. L-shaped magnet; 3243. Connecting part; 33. Center magnetic structure; 34. Avoidance groove; 35. Avoidance gap;

[0028] 4. Centering support; 41. Internal fixing portion; 42. Cantilever portion; 43. External fixing portion; 431. Internal portion; 432. Straight edge portion; 433. Conducting portion;

[0029] 5. Conductive board. DETAILED DESCRIPTION

[0030] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

[0031] Please refer to Figures 1 to 4 , sound unit, including:

[0032] Basin rack 1;

[0033] A vibration assembly 2, comprising a voice coil 21 and a diaphragm assembly 22 connected to the voice coil 21 and the basin frame 1;

[0034] A magnetic circuit assembly 3, comprising a yoke 31 and a side magnetic structure 32 connecting the yoke 31 and the basin frame 1, wherein the side magnetic structure 32 has an avoidance groove 34;

[0035] The centering support plate 4 includes an inner fixing portion 41, a cantilever portion 42, and an outer fixing portion 43 connected in sequence from the inside to the outside. At least a portion of the cantilever portion 42 is located in the avoidance groove 34. The inner fixing portion 41 is electrically connected to the voice coil 21. The outer fixing portion 43 includes an inner side portion 431 and a straight side portion 432 connected vertically. The inner side portion 431 is located in the avoidance groove 34 and connected to the basin frame 1. The straight side portion 432 is located on the outside of the basin frame 1 and connected to the basin frame 1.

[0036] The utility model discloses the beneficial effect in above description is at: the sounding unit structure novel, on the basis of not changing the overall volume of sounding unit, the majority area of the outer fixed part 43 of centering branch 4 is migrated to the outside of basin frame 1, so that the space below basin frame 1 can be occupied by side magnetic steel 322, make the side magnetic steel 322 in sounding unit realizes the expansion, increase the overall volume of side magnetic steel 322, it is favorable to enhance the magnetic field intensity of sounding unit, promote the performance sensitivity and loudness of sounding unit, improve the performance of sounding unit.But, the connecting area of side magnetic steel 322 and basin frame 1 / yoke 31 has been increased, it is favorable to improve the structural stability of sounding unit, so that the anti-falling reliability of sounding unit can be promoted.

[0037] Further, the outer fixed part 43 further includes a through part 433, the through part 433 is connected with the straight edge part 432 perpendicularly, the through part 433 is located at the end of the straight edge part 432, the through part 433 is located below the basin frame 1 and fixed on the bottom surface of the basin frame 1, the magnetic circuit assembly 3 has an avoiding gap 35 for avoiding the through part 433.

[0038] From the above description, the external power supply can use the through part 433 to electrify the centering branch 4, so that the voice coil 21 has current passing through.

[0039] Further, the bottom of the basin frame 1 has a lower convex part 11, the lower convex part 11 connects the inner side part 431.

[0040] From the above description, the existence of the lower convex part 11 can facilitate the positioning and installation of the outer fixed part 43 and the basin frame 1.

[0041] Further, the side magnetic structure 32 includes two concave magnetic structures 324 arranged oppositely and symmetrically, and a gap between the two concave magnetic structures 324 forms the avoiding slot 34.

[0042] From the above description, the side magnetic structure 32 has a large overall volume, which can make the sounding unit have a stronger magnetic field strength.

[0043] Further, each concave magnetic structure 324 includes a concave dust core 3241 and two L-shaped magnetic steels 3242, and the L-shaped magnetic steels 3242 connect the yoke 31 and the concave dust core 3241.

[0044] From the above description, the magnetic steels in the concave magnetic structure 324 are combined by two L-shaped magnetic steels 3242, which can reduce material waste during the manufacture of magnetic steels and control manufacturing costs.

[0045] Further, the L-shaped magnetic steel 3242 in one of the concave magnetic structures 324 is connected to the L-shaped magnetic steel 3242 in the other concave magnetic structure 324 and symmetrical to the L-shaped magnetic steel 3242 in the other concave magnetic structure 324 through the connecting part 3243.

[0046] As described above, the L-shaped magnetic steel 3242 in one of the concave magnetic structures 324 is connected to the L-shaped magnetic steel 3242 in the other concave magnetic structure 324 and symmetrical to the L-shaped magnetic steel 3242 in the other concave magnetic structure 324 through the connecting part 3243, which not only further increases the total volume of the magnetic steel in the side magnetic structure 32, but also facilitates the positioning and installation of the side magnetic steel 322.

[0047] Further, the avoiding groove 34 is located at the middle of the long side of the sound generating unit or the middle of the short side.

[0048] As described above, the specific position of the avoiding groove 34 on the side magnetic structure 32 can be set as needed.

[0049] Further, the magnetic circuit assembly 3 further comprises a center magnetic structure 33 arranged on the yoke 31, the center magnetic structure 33 is arranged corresponding to the hollow area of the voice coil 21, the number of the voice coil 21 is two, the two voice coils 21 are arranged side by side, and the gap between the two voice coils 21 corresponds to the avoiding groove 34.

[0050] As described above, the sound generating unit with the double-voice coil 21 architecture has stronger driving force and better performance.

[0051] Further, the utility model further comprises a conducting plate 5 connected to the diaphragm assembly 22, the conducting plate 5 is electrically connected with the two voice coils 21 respectively, and the two voice coils 21 are connected in series.

[0052] As described above, the conducting plate 5 can be an FPC soft plate, and the conducting plate 5 serves to conduct the two voice coils 21.

[0053] Further, the two voice coils 21 are bonded to each other.

[0054] As described above, the bonding of the two voice coils 21 to each other can improve the vibration segmentation phenomenon of the sound generating unit.

[0055] Embodiment one

[0056] Please refer to Figures 1 to 3 The embodiment one of the utility model discloses a sound generating unit, comprising a spider 1, a vibration assembly 2, a magnetic circuit assembly 3 and a centering sheet 4, the vibration assembly 2 comprises a voice coil 21 and a diaphragm assembly 22 connected to the voice coil 21 and the spider 1.

[0057] The magnetic circuit assembly 3 comprises a yoke 31, an edge magnetic structure 32 and a center magnetic structure 33 arranged on the yoke 31 respectively, the edge magnetic structure 32 is arranged around the center magnetic structure 33, the center magnetic structure 33 comprises a center magnetic steel and a center dust shield, the center magnetic steel connects the center dust shield and the yoke 31, the edge magnetic structure 32 has an avoiding slot 34, the avoiding slot 34 connects the inner wall surface and the outer wall surface of the edge magnetic structure 32, the edge magnetic structure 32 comprises an edge dust shield 321 and an edge magnetic steel 322 connecting the edge dust shield 321 and the yoke 31, the edge dust shield 321 connects the yoke 1; in one or more embodiments, the avoiding slot 34 also connects the top surface of the edge magnetic structure 32.

[0058] The centering sheet 4 comprises an inner fixing part 41, a cantilever part 42 and an outer fixing part 43 connected in sequence from inside to outside, at least part of the cantilever part 42 is located in the avoiding slot 34, the inner fixing part 41 is electrically connected with the voice coil 21, the outer fixing part 43 comprises an inner side part 431 and a straight edge part 432 connected vertically, the inner side part 431 is located in the avoiding slot 34 and connects the yoke 1, the straight edge part 432 is located outside the yoke 1 and connects the yoke 1, specifically, the inner side part 431 connects the bottom surface of the yoke 1, and the straight edge part 432 connects the outer wall surface of the yoke 1.

[0059] The outer fixing part 43 further comprises a through part 433, the through part 433 is connected with the straight edge part 432 vertically, the through part 433 is located at the end of the straight edge part 432, the through part 433 is located below the yoke 1 and fixed on the bottom surface of the yoke 1, the magnetic circuit assembly 3 has an avoiding gap 35 for avoiding the through part 433.

[0060] The straight edge part 432 connects the long side or the short side of the yoke 1, when the straight edge part 432 connects the long side of the yoke 1, the avoiding slot 34 is located in the middle of the long side of the sound unit; when the straight edge part 432 connects the short side of the yoke 1, the avoiding slot 34 is located in the middle of the short side of the sound unit.

[0061] To facilitate the positioning and installation of the centering sheet 4, optionally, the bottom of the yoke 1 has a lower protruding part 11, the lower protruding part 11 connects the inner side part 431.

[0062] Specifically, the edge magnetic structure 32 comprises two concave magnetic structures 324 arranged oppositely and symmetrically, the gap between the two concave magnetic structures 324 forms the avoiding slot 34, and the center magnetic structure 33 is located in the concave area of the concave magnetic structure 324.

[0063] In the embodiment, each of the concave magnetic structures 324 comprises a concave pot core 3241 and two L-shaped magnetic steels 3242 connecting the yoke 31 and the concave pot core 3241. It is easily understood that the two concave pot cores 3241 constitute the side pot core 321, and the two concave pot cores 3241 can be an integral structure for processing and assembling, and the four L-shaped magnetic steels 3242 are combined into the side magnetic steel 322. In other embodiments, the two L-shaped magnetic steels 3242 in the concave magnetic structure 324 can also be an integral structure connected.

[0064] The center magnetic structure 33 is arranged corresponding to the hollow area of the voice coil 21. In the embodiment, the number of the voice coil 21 is two, and the number of the center magnetic structure 33 is also two. The two center magnetic structures 33 are arranged one-to-one corresponding to the two voice coils 21. The two voice coils 21 are arranged side by side and bonded to each other. In the embodiment, the gap between the two voice coils 21 corresponds to the avoiding groove 34.

[0065] Optionally, the sound generating unit further comprises a conducting plate 5 connected to the diaphragm assembly 22. The conducting plate 5 is electrically connected to the two voice coils 21 respectively, and the two voice coils 21 are connected in series through the conducting plate 5. In a specific product, the two voice coils 21 can also be connected in parallel.

[0066] Embodiment two

[0067] Please refer to Figure 4 The embodiment two of the utility model is further improved on the basis of the embodiment one, and specifically, the L-shaped magnetic steel 3242 in one of the two concave magnetic structures 324 is connected to the L-shaped magnetic steel 3242 in the other concave magnetic structure 324 and symmetrical to the L-shaped magnetic steel 3242 through a connecting part 3243 to form an integral structure. In this way, the total volume of the side magnetic steel 322 can be further increased. It is easily understood that the connecting part 3243 is located in the avoiding groove 34.

[0068] In order to further improve the structural stability of the sound generating unit and increase the volume of the side magnetic steel 322 to a greater extent, preferably, the connecting part 3243 is fixedly connected to the inner side part 431.

[0069] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model. Any equivalent transformation or direct or indirect application in the related technical field according to the content of the utility model specification and drawings is also included in the patent protection range of the utility model.

Claims

1. A sound emitting unit, characterized by, The application relates to a loudspeaker, which comprises a frame, a vibration assembly, a magnetic circuit assembly, and a centering support sheet. The vibration assembly comprises a voice coil and a diaphragm assembly connected with the voice coil and the frame. The magnetic circuit assembly comprises a yoke and a side magnetic structure connected with the yoke and the frame, and the side magnetic structure has an avoiding slot. The centering support sheet comprises an inner fixing part, a cantilever part and an outer fixing part connected in sequence from inside to outside, at least part of the cantilever part is located in the avoiding slot, the inner fixing part is electrically connected with the voice coil, the outer fixing part comprises an inner side part and a straight edge part connected perpendicularly, the inner side part is located in the avoiding slot and connected with the frame, and the straight edge part is located outside the frame and connected with the frame. The outer fixing part further comprises a conducting part connected perpendicularly with the straight edge part, the conducting part is located at the end of the straight edge part, the conducting part is located below the frame and fixed on the bottom surface of the frame, and the magnetic circuit assembly has an avoiding gap for avoiding the conducting part.

2. The sound producing unit of claim 1, wherein, The bottom of the frame has a lower convex part connected with the inner side part.

3. The sound producing unit of claim 1, wherein, The side magnetic structure comprises two concave magnetic structures arranged oppositely and symmetrically, and the gap between the two concave magnetic structures forms the avoiding slot.

4. The sound producing unit of claim 1, wherein, Each of the concave magnetic structures comprises a concave Hua Si and two L-shaped magnetic steels connected with the yoke and the concave Hua Si.

5. The sound producing unit of claim 4, wherein, The L-shaped magnetic steel in one of the concave magnetic structures is connected with the L-shaped magnetic steel in the other concave magnetic structure and symmetrically arranged with the L-shaped magnetic steel.

6. The sound producing unit of claim 5, wherein, The avoiding slot is located in the middle of the long side of the sound unit or the middle of the short side.

7. The sound producing unit of claim 1, wherein, The magnetic circuit assembly further comprises a center magnetic structure arranged on the yoke, the center magnetic structure is arranged corresponding to the hollow area of the voice coil, the number of the voice coils is two, the two voice coils are arranged side by side, and the gap between the two voice coils is arranged corresponding to the avoiding slot.

8. The sound producing unit of claim 1, wherein, The loudspeaker further comprises a conducting plate connected with the diaphragm assembly, the conducting plate is electrically connected with the two voice coils respectively, and the two voice coils are connected in series.

9. The sound producing unit of claim 8, wherein, The two voice coils are bonded with each other.

10. The sound producing unit of claim 8, wherein, ​

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