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 arranged on the yoke, the edge magnetic structure is provided with an avoiding groove, the edge magnetic structure comprises an edge washer and edge magnetic steel connected with the edge washer and the yoke, a mounting groove is formed in the top of the edge magnetic steel, and the edge washer is connected with the basin frame; and the centering support chip 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, and partial area of the outer fixing part is fixed in the mounting groove and fixedly connected with the basin frame. The sound production unit is small in size and good in performance.

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 used in 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, the top surface of the outer fixed part of the centering sheet is connected to the bottom surface of the yoke, and the lower part of the outer fixed part of the centering sheet is often vacant. If this area can be utilized, it will help the performance of the sounding unit. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to provide a small-sized sounding unit with high performance sensitivity.

[0005] To solve the above technical problem, the utility model adopts the technical scheme as follows: a sounding unit, comprising:

[0006] A yoke;

[0007] A vibration assembly, comprising a voice coil and a diaphragm assembly connected to the voice coil and the yoke;

[0008] A magnetic circuit assembly, comprising a yoke and a side magnetic structure provided on the yoke, the side magnetic structure having an avoidance slot, the side magnetic structure comprising a side vane and a side magnetic steel connected to the side vane and the yoke, the top of the side magnetic steel being provided with a mounting slot, and the side vane being connected to the yoke;

[0009] A centering sheet, comprising an inner fixed part, a cantilever part and an outer fixed part connected in sequence from inside to outside, at least part of the cantilever part being located in the avoidance slot, the inner fixed part being electrically connected to the voice coil, and part of the outer fixed part being fixed in the mounting slot and fixedly connected to the yoke.

[0010] Further, the depth of the mounting slot is greater than or equal to the thickness of the outer fixed part.

[0011] Further, the outer fixed part is in the shape of a long strip.

[0012] Further, the magnetic circuit assembly has an avoidance notch for avoiding the end of the outer fixed part.

[0013] 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.

[0014] Further, each of the concave magnetic structures comprises a concave Hua Si and two L-shaped magnetic steels connecting the yoke and the concave Hua Si.

[0015] 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 therewith through a connecting part.

[0016] Further, the magnetic circuit assembly further comprises a center magnetic structure arranged on the yoke, 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 corresponds to the avoiding slot.

[0017] Further, a conducting plate connecting the diaphragm assembly is further included, the conducting plate is electrically connected with 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, without changing the overall volume of the sound generating unit, the part of the lower part of the outer fixing part of the centering sheet is 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 intensity 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. Moreover, the outer fixing part can be connected and fixed with the yoke and the side magnetic steel at the same time, the structural stability of the sound generating unit is improved, and the drop resistance reliability 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 sectional view of the sound generating unit of the utility model embodiment one;

[0022] Figure 3 It is Figure 2 It is an enlarged view of detail A;

[0023] Figure 4 It is a structure schematic view of part of the structure of the sound generating unit of the utility model embodiment one;

[0024] Figure 5 It is a structure schematic view of part of the structure of the sound generating unit of the utility model embodiment two.

[0025] Reference Signs List:

[0026] 1, frame; 11, lower convex part;

[0027] 2, vibration assembly; 21, voice coil; 22, diaphragm assembly;

[0028] 3, magnetic circuit assembly; 31, yoke; 32, edge magnetic structure; 321, edge amorphous metal; 322, edge magnetic steel; 323, mounting groove; 324, concave magnetic structure; 3241, concave amorphous metal; 3242, L-shaped magnetic steel; 3243, connecting part; 33, center magnetic structure; 34, avoidance slot; 35, avoidance notch;

[0029] 4, centering support sheet; 41, inner fixing part; 42, cantilever part; 43, outer fixing part;

[0030] 5, conduction plate. DETAILED DESCRIPTION

[0031] To explain the technical content, the purpose and effect of the present application in detail, the following will be described in conjunction with the embodiments and the accompanying drawings.

[0032] Please refer to Figures 1 to 5 , sound unit, comprising:

[0033] Frame 1;

[0034] Vibration assembly 2, the vibration assembly 2 includes voice coil 21 and diaphragm assembly 22 connected to the voice coil 21 and the frame 1;

[0035] Magnetic circuit assembly 3, the magnetic circuit assembly 3 includes yoke 31 and edge magnetic structure 32 provided on the yoke 31, the edge magnetic structure 32 has avoidance slot 34, the edge magnetic structure 32 includes edge amorphous metal 321 and edge magnetic steel 322 connecting the edge amorphous metal 321 and the yoke 31, the top of the edge magnetic steel 322 is provided with mounting groove 323, the edge amorphous metal 321 is connected to the frame 1;

[0036] Centering support sheet 4, the centering support sheet 4 includes inner fixing part 41, cantilever part 42 and outer fixing part 43 connected in sequence from inside to outside, at least part of the cantilever part 42 is located in the avoidance slot 34, the inner fixing part 41 is electrically connected to the voice coil 21, part of the outer fixing part 43 is fixed in the mounting groove 323 and is fixedly connected with the frame 1.

[0037] The utility model discloses the beneficial effect in above description is at: the sound unit structure novel, on the basis of not changing the overall volume of sound unit, let the part area of the lower fixed part 43 of the centering branch 4 be occupied by the side magnetic steel 322, make the side magnetic steel 322 in sound unit realize the expansion, increase the overall volume of side magnetic steel 322, benefit the enhancement sound unit's magnetic field intensity, promote the performance sensitivity and loudness of sound unit, improve the performance of sound unit.But, the fixed part 43 can be connected simultaneously with the basin frame 1 and side magnetic steel 322, improve the structure stability of sound unit, make the anti drop reliability of sound unit can be promoted.

[0038] Further, the depth of the mounting groove 323 is greater than or equal to the thickness of the outer fixing portion 43.

[0039] From the above description, the outer fixing portion 43 mounted in the mounting groove 323 will not affect the connection and fixation of the side magnetic steel 321 and the side magnetic steel 322.

[0040] Further, the outer fixing portion 43 is in a strip shape.

[0041] From the above description, the outer fixing portion 43 in a strip shape is simple in structure and easy to process.

[0042] Further, the magnetic circuit assembly 3 has an avoiding gap 35 for avoiding the end of the outer fixing portion 43.

[0043] From the above description, the end of the outer fixing portion 43 can be provided with an exposed pad, and an external power supply supplies power to the voice coil 21 through the exposed pad.

[0044] Further, the side magnetic structure 32 includes two concave magnetic structures 324 arranged opposite and symmetrically, and the gap between the two concave magnetic structures 324 forms the avoiding groove 34.

[0045] From the above description, the side magnetic structure 32 has a large overall volume, which can make the sound unit have a stronger magnetic field strength.

[0046] Further, each of the concave magnetic structures 324 includes a concave magnetic steel 3241 and two L-shaped magnetic steels 3242, and the L-shaped magnetic steels 3242 connect the yoke 31 and the concave magnetic steel 3241.

[0047] 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 facilitate the control of manufacturing costs.

[0048] 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 another of the concave magnetic structures 324 and symmetrical to the L-shaped magnetic steel 3242 in one of the concave magnetic structures 324 through a connecting part 3243.

[0049] 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 another of the concave magnetic structures 324 and symmetrical to the L-shaped magnetic steel 3242 in one of the concave magnetic structures 324 through a 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.

[0050] 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.

[0051] As described above, the sound generating unit with the double-voice coil 21 architecture has stronger driving force and better performance.

[0052] Further, 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.

[0053] 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.

[0054] Further, the two voice coils 21 are bonded to each other.

[0055] 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.

[0056] Embodiment one

[0057] Please refer to Figures 1 to 4 The embodiment one of the utility model discloses: sound generating unit, including the frame 1, vibration subassembly 2, magnetic circuit assembly 3 and centering sheet 4, vibration subassembly 2 includes voice coil 21 and the diaphragm assembly 22 of connecting voice coil 21 and frame 1;

[0058] 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 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 top of the edge magnetic steel 322 is provided with a mounting slot 323, the mounting slot 323 communicates with the outer wall surface of the edge magnetic steel 322, and the edge dust shield 321 is connected to the yoke 1.

[0059] 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 to the voice coil 21, and part of the outer fixing part 43 is fixed in the mounting slot 323 and fixedly connected to the yoke 1.

[0060] Preferably, the depth of the mounting slot 323 is greater than or equal to the thickness of the outer fixing part 43, when the depth of the mounting slot 323 is greater than the thickness of the outer fixing part 43, the bottom of the yoke 1 has a lower convex part 11 extending into the mounting slot 323, and the lower convex part 11 is connected to the outer fixing part 43. In a specific product, the depth of the mounting slot 323 is slightly smaller than the thickness of the outer fixing part 43, which is also acceptable.

[0061] As a preferred embodiment, the outer fixing part 43 is connected to the long side or the short side of the yoke 1, at this time, the outer fixing part 43 is in the shape of a long strip.

[0062] In a specific product, the magnetic circuit assembly 3 has an avoiding gap 35 for avoiding the end of the outer fixing part 43, and the outer fixing part 43 is provided with an exposed pad corresponding to the position of the avoiding gap 35.

[0063] 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.

[0064] 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 four L-shaped magnetic steels 3242 combine to form 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 together.

[0065] 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. The gap between the two voice coils 21 corresponds to the avoiding slot 34.

[0066] 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 specific products, the two voice coils 21 can also be connected in parallel.

[0067] Embodiment two

[0068] Please refer to Figure 5 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 the connecting part 3243 to form an integral structure, so that the total volume of the side magnetic steel 322 can be further increased.

[0069] In order to further increase the connection area of the outer fixing part 43 of the centering sheet 4 and the side magnetic steel 322, preferably, the connecting part 3243 is fixedly connected to the outer fixing part 43.

[0070] The above description 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 sheet. The vibration assembly comprises a voice coil and a diaphragm assembly connecting the voice coil and the frame. The magnetic circuit assembly comprises a yoke and a side magnetic structure arranged on the yoke, the side magnetic structure having an avoiding slot, the side magnetic structure comprising a side Halske coil and a side magnetic steel connecting the side Halske coil and the yoke, the top of the side magnetic steel being provided with a mounting slot, and the side Halske coil being connected with the frame. The centering 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 being arranged in the avoiding slot, the inner fixing part being electrically connected with the voice coil, and part of the outer fixing part being fixed in the mounting slot and being fixedly connected with the frame. The depth of the mounting slot is greater than or equal to the thickness of the outer fixing part.

2. The sound producing unit of claim 1, wherein, The outer fixing part is in the shape of a long strip.

3. The sound producing unit of claim 1, wherein, The magnetic circuit assembly has an avoiding gap for avoiding the end of the outer fixing part.

4. The sound producing unit of claim 3, 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.

5. The sound producing unit of claim 1, wherein, Each of the concave magnetic structures comprises a concave Halske coil and two L-shaped magnetic steels connecting the yoke and the concave Halske coil.

6. The sound producing unit of claim 5, wherein, The L-shaped magnetic steels in one of the concave magnetic structures are connected with the L-shaped magnetic steels in the other concave magnetic structure and symmetrically arranged with the L-shaped magnetic steels in the other concave magnetic structure through a connecting part.

7. The sound producing unit of claim 6, wherein, The magnetic circuit assembly further comprises a center magnetic structure arranged on the yoke, the center magnetic structure being arranged corresponding to the hollow area of the voice coil, the number of the voice coils being two, the two voice coils being arranged side by side, and the gap between the two voice coils being arranged corresponding to the avoiding slot.

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