Miniature loudspeaker device with reduced thickness

Abstract

The utility model relates to a miniature loudspeaker device with reduced thickness. The miniature loudspeaker device comprises a support, a magnetic bowl, a low-frequency vibration plate, magnetic steel, a pole piece, a voice coil, a dome and a voice diaphragm. The two low-frequency vibration plates are adhered to the two ends in the bracket; the magnetic steel comprises four pieces of edge magnetic steel and one piece of middle magnetic steel; the lower surfaces of the four pieces of middle magnetic steel and the lower surface of the piece of middle magnetic steel are bonded to the magnetic bowl, the four pieces of edge magnetic steel are distributed on the periphery of the middle magnetic steel, and a gap is reserved between the four pieces of edge magnetic steel and the middle magnetic steel. The inner wall of the support is provided with extension areas opposite to the four pieces of edge magnetic steel. The upper surfaces of the four pieces of edge magnetic steel are bonded to the lower surfaces of the corresponding extension areas. The pole piece is adhered to the upper surface of the middle magnetic steel; the voice diaphragm is adhered to the upper surface of the bracket; the dome is adhered to the lower surface of the voice diaphragm; the upper surface of the voice coil is adhered to the lower surface of the dome, and the lower surfaces of the two ends of the voice coil are respectively adhered to the two low-frequency vibration plates. Through the specific structural design, the thickness of the product is reduced, and the sound quality of the product is kept unchanged.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a miniaturized loudspeaker device with reduced thickness. Background Art

[0002] A miniaturized loudspeaker is a miniaturized electronic component, which is widely used in products such as mobile devices, headphones and audio systems. It can convert an electrical signal into air vibration to generate sound. Due to its advantages such as small size, low power consumption and good sound quality, it is very popular in the market. The diameter of a miniaturized loudspeaker is usually less than 20 mm, and the height is less than 10 mm, with a certain sound generation ability. It is usually composed of a diaphragm, a magnet, a wire, etc. After receiving an external electrical signal, the diaphragm is vibrated by the action of a magnetic field to generate sound. There are various miniaturized loudspeakers in the market, such as 28 mm internal magnetic horn loudspeakers and cavity loudspeakers directly supplied by manufacturers, which play important roles in different application scenarios.

[0003] With the development of the tablet industry, higher requirements are put forward for the thickness of miniaturized loudspeakers. At present, the usual method is to reduce the thickness of each component of the miniaturized loudspeaker, which has a certain impact on the performance of the loudspeaker.

[0004] Therefore, it is necessary to provide a miniaturized loudspeaker device with reduced thickness in order to solve the above technical problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a miniaturized loudspeaker device with reduced thickness. Through a specific structural design, the thickness of the product is reduced while maintaining the same sound quality of the product.

[0006] To achieve the above object of the utility model, a miniaturized loudspeaker device with reduced thickness is provided, which includes a bracket, a magnetic 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] The number of the low-frequency vibration plates is two, and the two low-frequency vibration plates are bonded to both ends inside the bracket;

[0009] On any one of the two low-frequency vibration plates, a circuit board is provided, and a positive connection end and a negative connection end are provided on the circuit board;

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

[0011] The lower surfaces of the four middle magnets and one middle magnet are all bonded to the magnetic bowl, and the four edge magnets are distributed around the middle magnet and are spaced from the middle magnet to allow the low-frequency vibration plate to vibrate;

[0012] An extension area is provided on the inner wall of the bracket opposite to the positions of the four edge magnets, and the upper surfaces of the four 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 sound film is bonded to the upper surface of the bracket;

[0015] The dome is bonded to the lower surface of the sound 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 the two low-frequency vibrating plates.

[0017] Preferably, profiling avoidance grooves are provided on the magnet directly below the positions of the two low-frequency vibrating plates.

[0018] Preferably, a plurality of protrusions are evenly provided in the bending area of the sound film.

[0019] Preferably, a downward depression is formed at the edge position of the upper surface of the pole piece to form an avoidance area.

[0020] The advantages of a thickness-reduced micro-speaker device of the present invention compared with the prior art are as follows:

[0021] (1) Bonding the two low-frequency vibrating plates to both ends inside the bracket effectively reduces the thickness of the entire micro-speaker, broadens the applicability, and keeps the sound quality of the product unchanged;

[0022] (2) The structure is simple and convenient to use. Description of the Drawings

[0023] Figure 1 is an exploded view of a thickness-reduced micro-speaker device of this embodiment;

[0024] Figure 2 is a schematic structural diagram of the pole piece in this embodiment;

[0025] Figure 3 is a schematic structural diagram of the low-frequency vibrating plate with a circuit board in this embodiment

[0026] Figure 4 is a cross-sectional view of a thickness-reduced micro-speaker device of this embodiment;

[0027] Figure 5 is a schematic structural diagram of a thickness-reduced micro-speaker device of this embodiment. Detailed Embodiments

[0028] The following further describes the present invention with reference to the drawings and specific embodiments.

[0029] As Figure 1 and Figure 5 shown, a thickness-reduced micro-speaker device of the present utility model includes a bracket 1, a magnetic bowl 2, a low-frequency vibrating plate 3, a magnetic steel, a pole piece 5, a voice coil 6, a dome 7 and a sounding film 8.

[0030] The bracket 1 is of a frame structure.

[0031] The number of the low-frequency vibrating plates 3 is two, and the two low-frequency vibrating plates 3 are bonded to two ends inside the bracket 1; in the two low-frequency vibrating plates 3, as Figure 3 shown, a circuit board 9 is provided on any one of the low-frequency vibrating plates, and a positive connection end 10 and a negative connection end 11 are provided on the circuit board 9.

[0032] The magnetic steel includes four edge magnetic steels 4 and one middle magnetic steel 12. The lower surfaces of the four middle magnetic steels 4 and one middle magnetic steel 12 are bonded to the magnetic bowl 2, and the four edge magnetic steels 4 are distributed around the middle magnetic steel 12 and have a gap from the middle magnetic steel 12 for the low-frequency vibrating plate 3 to vibrate.

[0033] Extension areas 13 are provided on the inner wall of the bracket 1 opposite to the four edge magnetic steels 4, and the upper surfaces of the four edge magnetic steels 4 are bonded to the lower surfaces of the corresponding extension areas 13.

[0034] The pole piece 5 is bonded to the upper surface of the middle magnetic steel 12.

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

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

[0037] The upper surface of the voice coil 6 is bonded to the lower surface of the dome 7, and the lower surfaces of the two ends of the voice coil 6 are respectively bonded to the two low-frequency vibrating plates 3; the two connection terminals of the voice coil 6 are respectively electrically connected to the positive connection end 10 and the negative connection end 11 on the circuit board 9.

[0038] In this embodiment, a profiling avoidance groove 14 is provided on the magnetic bowl 2 at a position directly below the two low-frequency vibrating plates 3 to avoid collision with the magnetic bowl 2 during vibration.

[0039] In this embodiment, a plurality of protrusions 15 are uniformly provided in the bending area of the sounding film 8 to effectively improve the strength of the bending part of the sounding film 8.

[0040] In this embodiment, as Figure 2As shown, a recessed avoidance area 16 is formed at the edge position of the upper surface of the pole piece 5. When the glue at the connection between the voice coil 6 and the voice diaphragm 8 overflows and flows downward and solidifies, when the voice coil 6 vibrates up and down, it can prevent the solidified glue from colliding with the pole piece 5, generating noise and affecting the sound quality.

[0041] As Figure 4 As shown, when the above-mentioned micro speaker is working, a voltage is input at the positive and negative positions of the low-frequency vibrating plate 3 and conducted to the pad of the speaker to excite the speaker to work. The speaker works to push the air in front of the voice diaphragm, and the air is pushed forward along the preset pipeline of the sound cavity and transmitted to the specified area. Since the two low-frequency vibrating plates 3 are located inside the bracket, the thickness of the entire micro speaker will not be increased. Through the above specific structural design, the height of the product is effectively reduced and the height of the product is kept unchanged.

[0042] The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A micro-speaker device with reduced thickness, characterized in that, It includes a bracket, a magnetic bowl, a low-frequency vibration plate, a magnet, a pole piece, a voice coil, a dome and a diaphragm; The bracket is of a frame structure; The number of the low-frequency vibration plates is two, and the two low-frequency vibration plates are bonded at both ends inside the bracket; Among the two low-frequency vibration plates, a circuit board is provided on any one of the low-frequency vibration plates, and a positive connection terminal and a negative connection terminal are provided on the circuit board; The magnet includes four edge magnets and one middle magnet; The lower surfaces of the four middle magnets and one middle magnet are all bonded to the magnetic bowl, and the four edge magnets are distributed around the middle magnet and have a spacing from the middle magnet to allow the low-frequency vibration plate to vibrate; Extension areas are provided on the inner wall of the bracket at positions opposite to the four edge magnets, and the upper surfaces of the four 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, and the lower surfaces of both ends of the voice coil are respectively bonded to the two low-frequency vibration plates.

2. The miniature loudspeaker device with reduced thickness according to claim 1, characterized in that, An imitation avoidance groove is provided on the magnet at a position directly below the two low-frequency vibration plates; 3. The miniature loudspeaker device for reducing thickness according to claim 1, characterized in that A plurality of protrusions are evenly provided in the bending area of the diaphragm; 4. A miniature loudspeaker device for reducing thickness according to any one of claims 1 to 3, characterized in that, A downward depression forms an avoidance area at the edge position of the upper surface of the pole piece.

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