Single magnetic circuit loudspeaker

Abstract

The utility model relates to a loudspeaker with a single magnetic circuit. The loudspeaker comprises a support, a magnetic bowl, main magnetic steel, a main pole piece, a voice coil, a voice diaphragm and a dome, positioning protrusions are arranged at the corners of the upper surface of the support. A positive electrode bonding pad and a negative electrode bonding pad are embedded on the bracket; the corner positions of the magnetic bowl horizontally extend outwards to form extension parts; the edge position of the magnetic bowl is vertically bent downwards to form a fitting part, and the fitting part of the magnetic bowl is adhered to the inner wall of the bracket through the fitting part; one surface of the main magnetic steel is adhered to the inner wall of the magnetic bowl; the main pole piece is adhered to one surface, back to the magnetic bowl, of the main magnetic steel; two lead heads on the voice coil are respectively welded with the lower surface of the positive electrode bonding pad and the lower surface of the negative electrode bonding pad; the main pole piece is positioned in the voice coil; the voice diaphragm is adhered to the lower surface of the bracket; and the dome is adhered to the upper surface of the voice diaphragm. According to the utility model, the structural design is optimized, so that only a single magnetic circuit is used, and the product cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a single-magnetic-circuit loudspeaker. Background Art

[0002] A loudspeaker usually includes a voice coil and a magnetic circuit assembly. When the voice coil is connected to an electric current, the voice coil vibrates back and forth along its axial direction under the action of the magnetic field generated by the magnetic circuit assembly, thereby driving the diaphragm to vibrate together and produce sound.

[0003] At present, the magnets in the loudspeaker include a main magnet and an auxiliary magnet, which are relatively complicated to install, and the cost of a multi-magnetic circuit loudspeaker composed of the main magnet and the auxiliary magnet is relatively high.

[0004] Therefore, it is necessary to further improve the structure of the bonding equipment to solve the problem of misalignment between the pole piece and the magnetic steel during bonding. Utility Model Content

[0005] The utility model aims to provide a single-magnetic-circuit speaker, which uses only a single magnetic circuit through optimized structural design, thereby greatly reducing product costs.

[0006] In order to achieve the purpose of the above utility model, a single magnetic circuit speaker is provided, including a bracket, a magnetic bowl, a main magnetic steel, a main pole piece, a voice coil, a sound membrane and a dome;

[0007] The bracket is a frame structure, and the corners of the upper surface of the bracket are provided with positioning protrusions, and the positioning protrusions are all flush;

[0008] The bracket is inlaid with a positive electrode pad and a negative electrode pad, the upper surface of the positive electrode pad and the upper surface of the negative electrode pad are both exposed on the upper surface of the bracket, and the lower surface of the positive electrode pad and the lower surface of the negative electrode pad are both exposed on the lower surface of the bracket;

[0009] The corners of the magnetic bowl are horizontally extended outward to form an extension portion, and the position of the extension portion on the magnetic bowl is matched with the position of the positioning protrusion on the bracket;

[0010] The edge of the magnetic bowl is bent vertically downward to form a fitting portion, and the surface of the fitting portion is coated with glue;

[0011] The fitting portion of the magnetic bowl is bonded to the inner wall of the bracket by the glue;

[0012] One side of the main magnetic steel is bonded to the inner wall of the magnetic bowl;

[0013] The main pole piece is bonded to a surface of the main magnetic steel facing away from the magnetic bowl;

[0014] The two lead heads on the voice coil are respectively welded to the lower surface of the positive electrode pad and the lower surface of the negative electrode pad, and the upper surface of the positive electrode pad and the upper surface of the negative electrode pad are respectively connected to the positive electrode and the negative electrode of the external power supply;

[0015] The main pole piece is located in the voice coil;

[0016] The sound film is bonded to the lower surface of the bracket and covers the main magnetic steel, the main pole piece and the voice coil;

[0017] The dome is bonded to the upper surface of the sound membrane.

[0018] Preferably, the inner wall corners of the sound membrane all have recessed portions.

[0019] Furthermore, a weight-reducing hole is provided at the center of the sound membrane, and the dome covers the weight-reducing hole.

[0020] Preferably, a plurality of ventilation holes are evenly arranged on the bracket.

[0021] Preferably, the glue coated on the surface of the bonding portion is anaerobic glue.

[0022] Compared with the prior art, the single magnetic circuit speaker of the utility model has the following advantages:

[0023] (1) The original multi-magnetic circuit products are optimized to use only a single magnetic circuit through structural design, which greatly reduces product costs and maintains product performance;

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

[0025] Figure 1 is a structural schematic diagram of a single magnetic circuit speaker of this embodiment;

[0026] Figure 2 An exploded view of a single magnetic circuit speaker of this embodiment;

[0027] Figure 3 is a schematic diagram of the front structure of the bracket in this embodiment;

[0028] Figure 4 is a schematic diagram of the back structure of the bracket in this embodiment;

[0029] Figure 5 is a schematic diagram of the structure of the magnetic bowl in this embodiment;

[0030] Figure 6 Schematic diagram of the structure of the sound membrane in this embodiment;

[0031] Figure 7 It is a cross-sectional view of a single-magnetic-circuit loudspeaker of this embodiment. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] like Figure 1 and Figure 2 As shown, a single-magnetic-circuit loudspeaker of the utility model comprises a bracket 4, a magnetic bowl 1, a main magnetic steel 2, a main pole piece 3, a voice coil 5, a sound membrane 6 and a dome 7.

[0034] like Figure 3 and Figure 4 As shown, the bracket 4 is a frame structure, and the upper surface corners of the bracket 4 are provided with positioning protrusions 8, and the positioning protrusions 8 are all flush; the bracket 4 is inlaid with a positive electrode pad 9 and a negative electrode pad 10, and the upper surfaces of the positive electrode pad 9 and the upper surfaces of the negative electrode pad 10 are both exposed on the upper surface of the bracket 4, and the lower surfaces of the positive electrode pad 9 and the lower surfaces of the negative electrode pad 10 are both exposed on the lower surface of the bracket 4.

[0035] like Figure 5 As shown, the corners of the magnetic bowl 1 extend outward horizontally to form an extension portion 11, and the position of the extension portion 11 on the magnetic bowl 1 matches the position of the positioning protrusion 8 on the bracket 4; the edge of the magnetic bowl 1 is bent vertically downward to form a fitting portion 12, and the surface of the fitting portion 12 is coated with glue; the fitting portion 12 of the magnetic bowl 1 is bonded to the inner wall of the bracket 4 by the glue. The magnetic bowl 1 is bent out of the fitting portion 11 by the hardware bending process to replace the original auxiliary magnetic steel to achieve the original auxiliary magnetic steel magnetic conductivity effect. This design can reduce material costs and process steps to achieve cost reduction and efficiency improvement.

[0036] One side of the main magnetic steel 2 is bonded to the inner wall of the magnetic bowl 1 ; the main pole piece 3 is bonded to the side of the main magnetic steel 2 facing away from the magnetic bowl 1 .

[0037] The two lead heads on the voice coil 5 are respectively welded to the lower surface of the positive electrode pad 9 and the lower surface of the negative electrode pad 10, and the upper surface of the positive electrode pad 9 and the upper surface of the negative electrode pad 10 are respectively connected to the positive and negative electrodes of the external power supply to play a conductive role.

[0038] The main pole piece 3 is located inside the voice coil 5 .

[0039] The sound membrane 6 is bonded to the lower surface of the bracket 4 and covers the main magnetic steel 2 , the main pole piece 3 and the voice coil 4 .

[0040] The dome 7 is bonded to the upper surface of the diaphragm 6 .

[0041] In this embodiment, if Figure 6As shown, the inner wall corners of the sound diaphragm 6 are provided with recessed portions 13 , which effectively reduce stress and extend the service life of the sound diaphragm 6 .

[0042] Furthermore, a weight-reducing hole 14 is provided at the center of the sound membrane 6 , and the dome 7 covers the weight-reducing hole 14 .

[0043] like Figure 7 As shown, the magnetic bowl, main magnet, and main pole piece combination provide magnetic power for the speaker. + / - voltage is input on the upper surface of the positive pad and the upper surface of the negative pad, and the current passes through the voice coil, cutting the magnetic field generated by the "magnetic bowl, main magnet, main pole piece, combination" up and down, thereby pushing the sound membrane 6 and the dome 7 up and down, and then pushing the air, so that the sound is transmitted.

[0044] In this embodiment, a plurality of ventilation holes 11 are evenly arranged on the bracket 4 to increase the air circulation inside the speaker and improve the effect of sound propagation.

[0045] In this embodiment, the glue coated on the surface of the bonding portion 12 is anaerobic glue, which plays an antioxidant role, effectively prolongs the bonding effect of the glue, and increases the service life of the product.

[0046] 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 may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all within the scope defined by the claims of this application.

Claims

1. A single magnetic circuit loudspeaker, characterized in that: Including bracket, magnetic bowl, main magnet, main pole piece, voice coil, diaphragm and dome; The bracket is a frame structure, and the corners of the upper surface of the bracket are provided with positioning protrusions, and the positioning protrusions are all flush; The bracket is inlaid with a positive electrode pad and a negative electrode pad, the upper surface of the positive electrode pad and the upper surface of the negative electrode pad are both exposed on the upper surface of the bracket, and the lower surface of the positive electrode pad and the lower surface of the negative electrode pad are both exposed on the lower surface of the bracket; The corners of the magnetic bowl are horizontally extended outward to form an extension portion, and the position of the extension portion on the magnetic bowl is matched with the position of the positioning protrusion on the bracket; The edge of the magnetic bowl is bent vertically downward to form a fitting portion, and the surface of the fitting portion is coated with glue; The fitting portion of the magnetic bowl is bonded to the inner wall of the bracket by the glue; One side of the main magnetic steel is bonded to the inner wall of the magnetic bowl; The main pole piece is bonded to a surface of the main magnetic steel facing away from the magnetic bowl; The two lead heads on the voice coil are respectively welded to the lower surface of the positive electrode pad and the lower surface of the negative electrode pad, and the upper surface of the positive electrode pad and the upper surface of the negative electrode pad are respectively connected to the positive electrode and the negative electrode of the external power supply; The main pole piece is located in the voice coil; The sound film is bonded to the lower surface of the bracket and covers the main magnetic steel, the main pole piece and the voice coil; The dome is bonded to the upper surface of the sound membrane.

2. A single magnetic circuit loudspeaker as claimed in claim 1, characterized in that: The inner wall corners of the sound membrane are all provided with recessed parts.

3. A single magnetic circuit loudspeaker as claimed in claim 2, characterized in that: The sound membrane has a weight-reducing hole at the center, and the dome covers the weight-reducing hole.

4. A single magnetic circuit loudspeaker as claimed in any one of claims 1 to 3, characterized in that: A plurality of ventilation holes are evenly arranged on the bracket.

5. A single magnetic circuit loudspeaker as claimed in claim 1, characterized in that: The glue coated on the surface of the bonding part is anaerobic glue.

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