Elastic sheet type miniature loudspeaker

Abstract

The utility model relates to an elastic sheet type miniature loudspeaker, which comprises a bracket, a porcelain bowl, a low-frequency vibrating plate, magnetic steel, a pole piece, a voice coil, a dome and a voice diaphragm, elastic pieces are symmetrically embedded in the two ends of the support, one ends of the elastic pieces extend into the support, the other ends of the elastic pieces extend out of the bottom of the support, and the portions, extending out of the support, of the elastic pieces are provided with protruding areas; the number of the low-frequency vibration plates is two, circuit boards are arranged on the two low-frequency vibration plates, each circuit board is provided with a connecting end, and the connecting ends are welded to the portions, extending to the support, of the elastic pieces. The magnetic steel comprises two pieces of edge magnetic steel and a piece of middle magnetic steel; the inner wall of the support is provided with extension areas opposite to the two pieces of edge magnetic steel, and the upper surfaces of the two pieces of edge magnetic steel are adhered to the lower surfaces of the corresponding extension areas. According to the utility model, through a specific structural design, FPC contact welding originally used by the product is replaced by elastic sheet linkage, so that the assembly is rapid and the process risk is low.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a diaphragm type micro loudspeaker. Background Art

[0002] A loudspeaker is a transducer that converts an electrical signal into an acoustic signal and is an important acoustic component in electronic products. A loudspeaker module generally includes a frame, a magnetic circuit system disposed within the frame, and a vibration system. Among them, the vibration system includes a diaphragm and a voice coil disposed below the diaphragm. The voice coil drives the diaphragm to generate sound under the action of the magnetic circuit system.

[0003] Currently, the connection ends of the circuit boards on the low-frequency vibration plates in micro loudspeakers are usually connected to external circuits by welding. When the size of the product is further reduced, the above connection method has a complex process and occupies a large space.

[0004] Therefore, it is necessary to provide a diaphragm type micro loudspeaker in order to solve the above technical problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a diaphragm type micro loudspeaker with diaphragm connection, fast assembly and low manufacturing risk.

[0006] To achieve the purpose of the above utility model, a diaphragm type micro loudspeaker is provided, which includes a bracket, a porcelain bowl, a low-frequency vibration plate, a magnet, a pole piece, a voice coil, a dome and a sound film;

[0007] The bracket is of a frame structure;

[0008] Elastic pieces are symmetrically embedded at both ends of the bracket. One end of the elastic piece extends into the bracket, and the other end of the elastic piece extends out of the bottom of the bracket. The part of the elastic piece extending out of the bracket has a raised area;

[0009] The number of the low-frequency vibration plates is two. Circuit boards are provided on the two low-frequency vibration plates. Connection ends are provided on each circuit board. The connection ends are welded to the part of the elastic piece extending into the bracket to realize electrical connection with the elastic piece;

[0010] The magnet includes two edge magnets and one middle magnet;

[0011] The lower surfaces of the two middle magnets and one middle magnet are bonded to the porcelain bowl. The two edge magnets are distributed on both sides of the middle magnet and have a gap from the middle magnet to allow the low-frequency vibration plate to vibrate;

[0012] Extension areas are provided on the inner wall of the bracket opposite to the positions of the two edge magnets. The upper surfaces of the two edge magnets are bonded to the lower surfaces of the corresponding extension areas;

[0013] The pole piece is bonded to the upper surface of the middle magnet.

[0014] The sounding film is bonded to the upper surface of the bracket.

[0015] The dome is bonded to the lower surface of the sounding film.

[0016] The upper surface of the voice coil is bonded to the lower surface of the dome, and the lower surfaces of both ends of the voice coil are respectively bonded to two low-frequency vibrating plates.

[0017] The two wiring terminals of the voice coil are respectively electrically connected to the connection terminals on two circuit boards.

[0018] Specifically, a front cover is bonded to the edge position of the sounding film.

[0019] Specifically, the bottom of the front cover has at least two stepped portions.

[0020] Further, the number of stepped portions is two.

[0021] Preferably, a plurality of protrusions are provided in the bending area of the voice coil.

[0022] The advantages of a shrapnel-type micro speaker of the present utility model compared with the prior art are as follows:

[0023] (1) Through a specific structural design, the FPC contact welding originally used in the product is replaced with shrapnel connection, with fast assembly and low process risk;

[0024] (2) The structure is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an exploded view of a shrapnel-type micro speaker of this embodiment;

[0026] Figure 2 is a structural schematic diagram of a shrapnel-type micro speaker of this embodiment;

[0027] Figure 3 is a cross-sectional view of a shrapnel-type micro speaker of this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following further describes the present utility model in conjunction with the drawings and specific embodiments.

[0029] As Figure 1 and Figure 2 shown, a shrapnel-type micro speaker of the present utility model includes a bracket 1, a porcelain bowl 2, a low-frequency vibrating plate 3, a magnet 4, a pole piece 5, a voice coil 6, a dome 7, and a sounding film 8.

[0030] The bracket 1 has a frame structure; elastic pieces 9 are symmetrically inlaid at both ends of the bracket 1. One end of the elastic piece 9 extends into the bracket 1, and the other end of the elastic piece 9 extends out of the bottom of the bracket 1. The part of the elastic piece 9 extending out of the bracket 1 has a convex area 10.

[0031] There are two low-frequency vibrating plates 3. Circuit boards 11 are provided on the two low-frequency vibrating plates 3. Connecting ends 12 are provided on each circuit board 11. The connecting ends 12 are welded to the part of the elastic piece 9 extending into the bracket 1 to achieve electrical connection with the elastic piece 9.

[0032] The magnet includes two edge magnets 13 and one middle magnet 14. The lower surfaces of the two middle magnets 13 and one middle magnet 14 are bonded to the magnetic bowl 2. The two edge magnets 13 are distributed on both sides of the middle magnet 14 and are spaced from the middle magnet 14 to allow the low-frequency vibrating plate to vibrate.

[0033] Extension areas 15 are provided on the inner wall of the bracket 1 opposite the two edge magnets 13. The upper surfaces of the two edge magnets 13 are bonded to the lower surfaces of the corresponding extension areas 15.

[0034] The pole piece 5 is bonded to the upper surface of the middle magnet 14.

[0035] The sounding diaphragm 8 is bonded to the upper surface of the bracket 1.

[0036] The dome 7 is bonded to the lower surface of the sounding diaphragm 8.

[0037] The upper surface of the voice coil 6 is bonded to the lower surface of the dome 7. The two lower surfaces of the two ends of the voice coil 6 are respectively bonded to the two low-frequency vibrating plates 3; the two wiring ends of the voice coil 6 are respectively electrically connected to the connecting ends on the two circuit boards.

[0038] In this embodiment, a front cover 15 is bonded to the edge position of the sounding diaphragm 8 to play a role in waterproofing. Further, at least two step portions 16 are provided at the bottom of the front cover 15 to effectively improve the sealing performance and the waterproof effect. In this embodiment, the number of the step portions 16 is two.

[0039] In this embodiment, a plurality of protrusions 17 are provided in the bending area of the voice coil 6 to improve the strength.

[0040] As Figure 3 shown, when the above-mentioned micro speaker works, voltage is input at the positive and negative positions of the elastic piece and conducted to the pads of the speaker to excite the speaker to work. The speaker works to push the air in front of the vibrating diaphragm, and the air is pushed forward along the preset pipeline of the sound cavity and transmitted to the designated area.

[0041] The preferred embodiments of the present utility model have been specifically described above. However, the present utility model is not limited to the described embodiments. Those skilled in the art can also make various equivalent modifications or substitutions without departing from the spirit of the present utility model, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A chip-type micro speaker, characterized in that It includes a bracket, a porcelain bowl, a low-frequency vibrating plate, a magnet, a pole piece, a voice coil, a dome and a diaphragm; The bracket is of a frame structure; Elastic pieces are symmetrically inlaid at both ends of the bracket. One end of the elastic piece extends into the bracket, and the other end of the elastic piece extends out of the bottom of the bracket. The part of the elastic piece extending out of the bracket has a raised area; The number of the low-frequency vibrating plates is two. Circuit boards are provided on the two low-frequency vibrating plates. Connection ends are provided on each circuit board. The connection ends are welded to the part of the elastic piece extending into the bracket to achieve electrical connection with the elastic piece; The magnet includes two edge magnets and one middle magnet; The lower surfaces of the two middle magnets and one middle magnet are bonded to the porcelain bowl. The two edge magnets are distributed on both sides of the middle magnet and are spaced from the middle magnet to allow the low-frequency vibrating plate to vibrate; Extension areas are provided on the inner wall of the bracket opposite to the two edge magnets. The upper surfaces of the two edge magnets are bonded to the lower surfaces of the corresponding extension areas; The pole piece is bonded to the upper surface of the middle magnet; The diaphragm is bonded to the upper surface of the bracket; The dome is bonded to the lower surface of the diaphragm; The upper surface of the voice coil is bonded to the lower surface of the dome. The lower surfaces of both ends of the voice coil are respectively bonded to the two low-frequency vibrating plates; The two connection terminals of the voice coil are respectively electrically connected to the connection ends on the two circuit boards.

2. The diaphragm type micro-speaker according to claim 1, wherein A front cover is bonded to the edge position of the diaphragm.

3. The diaphragm type micro-speaker according to claim 2, wherein, At least two stepped portions are provided at the bottom of the front cover.

4. The diaphragm type micro-speaker according to claim 3, characterized in that, The number of the stepped portions is two.

5. A shrapnel type micro-speaker according to any one of claims 1 to 4, characterized in that, A plurality of protrusions are provided in the bent area of the voice coil.

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