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CN-121985270-A - Planar loudspeaker of flexible circuit board and assembling method thereof

CN121985270ACN 121985270 ACN121985270 ACN 121985270ACN-121985270-A

Abstract

The invention discloses a planar loudspeaker of a flexible circuit board and an assembling method thereof, belonging to the technical field of loudspeakers, comprising a shell, wherein the bottom of the shell is provided with a washer, an external magnet and an internal magnet are arranged above the washer, the upper part of the outer magnet and the inner magnet is provided with a flexible plate, the upper surface of the flexible plate is provided with an upper coil, the lower surface of the flexible plate is provided with a lower coil, the upper coil, the flexible plate and the lower coil are adhered to a diaphragm, and the diaphragm is positioned at the upper end of the inner side of the shell. The invention solves the problems that the existing diaphragm has no folding ring, the elasticity of the diaphragm is poor, the vibration amplitude is small, and the low-frequency performance of the loudspeaker is poor. The invention adopts the flexible circuit board to replace the coil, the shape of the membrane is a plane or an arc structure with a folded ring, as long as the joint position of the membrane and the flexible circuit board is a plane, the flexible circuit board directly leads out two bonding pads, the step of welding an electronic wire by a loudspeaker is omitted, the assembly is simpler, the cost is lower, the consistency of the flexible circuit board is better, the thickness is better, and the whole thickness and the quality of the loudspeaker are convenient to reduce.

Inventors

  • YANG LEI

Assignees

  • 安徽华韵声学科技有限公司

Dates

Publication Date
20260505
Application Date
20260210

Claims (10)

  1. 1. The utility model provides a plane loudspeaker of flexible line way board, includes shell (1), its characterized in that, the bottom of shell (1) is equipped with washer (8), the top of washer (8) is equipped with outer magnetism (6) and interior magnetism (7), and wherein, interior magnetism (7) are located the inboard of outer magnetism (6), the top of outer magnetism (6) and interior magnetism (7) is equipped with flexible board (4), the upper surface of flexible board (4) is equipped with upper coil (3), the lower surface of flexible board (4) is equipped with down coil (5), upper coil (3), flexible board (4) and lower coil (5) are pasted on diaphragm (2), diaphragm (2) are located the inboard upper end of shell (1).
  2. 2. A planar horn of a flexible circuit board according to claim 1, characterized in that the washer (8) is provided with a central hole (9).
  3. 3. The planar loudspeaker of the flexible circuit board according to claim 2, wherein the external magnet (6) and the internal magnet (7) form a magnetic circuit system, and the magnetic circuit system is the external magnet (6) and the internal magnet (7) below the diaphragm (2), or the external magnet (6) and the internal magnet (7) are respectively arranged above and below the diaphragm (2).
  4. 4. A planar loudspeaker of a flexible circuit board according to claim 3, wherein the outer magnet (6) and the inner magnet (7) are one of round and square, and the outer magnet (6) and the inner magnet (7) are made of neodymium-iron-boron permanent magnets.
  5. 5. The planar horn of claim 4, wherein the outer magnet (6) and the inner magnet (7) are opposite in magnetic properties, and the outer magnet (6) and the inner magnet (7) are both magnetic properties in the Y-axis direction.
  6. 6. The planar horn of the flexible circuit board according to claim 5, wherein the washer (8) is made of SPCC or SPCE magnetic conductive material and has a thickness of 0.1-0.4mm, and the washer (8) is used for guiding the magnetic fields at the bottoms of the outer magnet (6) and the inner magnet (7) to the positions above the outer magnet (6) and the inner magnet (7).
  7. 7. The planar horn of claim 6, wherein the upper coil (3) and the lower coil (5) are made of copper wires, copper-clad aluminum or aluminum wires, and the base material of the flexible board (4) is one or more composite materials of PI, PET, PEN, peek.
  8. 8. The planar horn of claim 7, wherein the membrane (2) is circular or square, a plane is provided in the middle of the membrane (2) for attaching the flexible board (4), and the fold ring of the membrane (2) is arc-shaped or plane.
  9. 9. The planar horn of a flexible circuit board according to claim 8, wherein the upper coil (3) and the lower coil (5) are a thin spiral conductive layer, the upper coil (3) and the lower coil (5) are hollow structures, the shapes of the upper coil (3) and the lower coil (5) are round, square or oval, the thicknesses of the upper coil (3) and the lower coil (5) are 1um-50um, the upper coil (3) and the lower coil (5) arranged on the flexible board (4) are connected through a through hole (41), the connection directions are opposite, namely, a wire outlet of the upper coil (3) is connected with a wire inlet of the lower coil (5), a bonding pad (11) is led out from the end parts of the upper coil (3) and the lower coil (5), and the bonding pad (11) is used for connecting a complete machine circuit.
  10. 10. A method for assembling a planar horn of a flexible wiring board as set forth in claim 9, comprising the steps of: S1, placing an outer magnet (6) and an inner magnet (7) on the upper surface of a washer (8), and placing the inner magnet (7) on the inner side of the outer magnet (6); S2, arranging an upper coil (3) on the upper surface of the flexible board (4), and arranging a lower coil (5) on the lower surface of the flexible board (4) to form a flexible circuit board; And S3, sticking the flexible circuit board on the membrane (2), mounting the membrane (2) at the upper end of the inner side of the shell (1), assembling the shell (1) on the washer (8), and embedding the washer (8) at the inner side of the bottom of the shell (1) to complete the assembly of the planar horn.

Description

Planar loudspeaker of flexible circuit board and assembling method thereof Technical Field The invention relates to the technical field of horns, in particular to a planar horn of a flexible circuit board and an assembly method thereof. Background For the loudspeaker, after the voice coil is electrified with alternating current, the voice coil is acted by a magnetic field to drive the diaphragm to vibrate up and down, so the voice coil is an important part of the loudspeaker. The voice coil of the traditional loudspeaker is wound together layer by layer in a winding mode, and is welded with the circuit board after being bonded with the diaphragm, on one hand, the winding mode of the voice coil, the winding tightness and the winding temperature can influence the number of turns and the diameter size of the voice coil, and the voice coil change has relatively large influence on the loudspeaker performance, so that the consistency is relatively poor, on the other hand, after the voice coil is bonded with the diaphragm, the two voice coil wires led out also need to be in line with the line so that the wires can not touch the diaphragm, then are welded with the circuit board, the line with the welding procedure is complex, the risk of broken voice coil wires exists, and therefore, the cost is high, and the consistency is also poor. The current horn coil silk-screen printing mode in the market is to directly print the coil on the membrane by etching or silk-screen printing. However, with this construction, the diaphragm can only be planar, since the curved diaphragm has no way to print. Whereas for a horn the membrane directly affects the low frequency performance. If the diaphragm does not have a folded ring, the elasticity of the diaphragm becomes poor, the vibration amplitude becomes small, and the low-frequency performance of the horn becomes poor. Disclosure of Invention The invention aims to provide a planar loudspeaker of a flexible circuit board and an assembling method thereof, wherein the planar loudspeaker is simpler to assemble and lower in cost, and the flexible circuit board is better in consistency and thickness, so that the overall thickness and quality of the loudspeaker are reduced conveniently, and the low-frequency performance of the loudspeaker can be improved, so that the problems in the background technology are solved. In order to achieve the above purpose, the present invention provides the following technical solutions: The utility model provides a planar loudspeaker of flexible line way board, includes the shell, the bottom of shell is equipped with the washer, the top of washer is equipped with outer magnetism and interior magnetism, and wherein, interior magnetism is located the inboard of outer magnetism, the top of outer magnetism and interior magnetism is equipped with the flexible sheet, the upper surface of flexible sheet is equipped with the coil, the lower surface of flexible sheet is equipped with down the coil, go up coil, flexible sheet and lower coil and paste on the diaphragm, the diaphragm is located the inboard upper end of shell. Specifically, the flexible circuit board is adopted to replace the coil, the external dimension of the flexible circuit board is similar to the external diameter of the voice coil, the flexible circuit board can be directly attached to the diaphragm, the shape of the diaphragm can be a plane, the diaphragm can also be of a curved structure with a folded ring, as long as the attaching position of the diaphragm and the flexible circuit board is a plane, the flexible circuit board can directly lead out two bonding pads, the step of welding an electronic wire by a loudspeaker is omitted, therefore, the assembly is simpler, the cost is lower, the consistency of the flexible circuit board is better, the thickness is better, and the whole thickness and the quality of the loudspeaker are convenient to reduce. Preferably, the washer is provided with a middle hole. Preferably, the external magnet and the internal magnet form a magnetic circuit system, the magnetic circuit system is the external magnet and the internal magnet below the diaphragm, or the external magnet and the internal magnet are respectively arranged above and below the diaphragm, the external magnet and the internal magnet are one of a round shape and a square shape, and the external magnet and the internal magnet are made of neodymium-iron-boron permanent magnets. Preferably, the external magnetism and the internal magnetism are opposite in magnetism, and the external magnetism and the internal magnetism are both magnetism in the Y-axis direction. Specifically, the washer guides the magnetic fields at the bottoms of the outer magnet and the inner magnet to the upper parts of the outer magnet and the inner magnet, so that the efficiency of the voice coil in the magnetic field is improved, and the washer is embedded into the shell and does not occupy the height space. Preferably, the was