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CN-122026653-A - Motor assembly of miniature fan, assembling method and miniature fan

CN122026653ACN 122026653 ACN122026653 ACN 122026653ACN-122026653-A

Abstract

The invention belongs to the technical field of fans, and discloses a motor assembly of a micro fan, an assembling method and the micro fan, wherein the motor assembly comprises a shell, a flexible circuit board and a plurality of coils, a mounting part and a plurality of protruding parts are arranged on the shell, the protruding parts are arranged around the mounting part, the mounting part is used for mounting a rotating part, the flexible circuit board is mounted on the shell, the flexible circuit board is provided with an avoidance hole, the mounting part and the protruding parts are arranged in the avoidance hole, the coils are in one-to-one corresponding connection with the protruding parts, the coils are electrically connected with the flexible circuit board, and the flexible circuit board and the coils are fixed on the shell through glue filling layers. The motor assembly is simple in assembly process, high in product concentricity precision, accurate in coil arrangement array angle, accurate in part size, good in waterproof performance and capable of reducing the risk of coil breakage damage.

Inventors

  • SUN QINGJIE
  • XU JIANHUI

Assignees

  • 苏州兆威驱动有限公司

Dates

Publication Date
20260512
Application Date
20260312

Claims (10)

  1. 1. A motor assembly for a micro fan, comprising: A housing (110), wherein a mounting part (1112) and a plurality of protruding parts (1113) are arranged on the housing (110), the plurality of protruding parts (1113) are arranged around the mounting part (1112), and the mounting part (1112) is used for mounting a rotating component; the flexible circuit board (130), the flexible circuit board (130) is installed in the shell (110), the flexible circuit board (130) is provided with an avoidance hole (131), and the installation part (1112) and the protruding part (1113) are both arranged in the avoidance hole (131); The coils (120) are inserted into the protruding portions (1113) in a one-to-one correspondence manner, the coils (120) are electrically connected with the flexible circuit board (130), and the flexible circuit board (130) and the coils (120) are fixed to the shell (110) through glue filling layers.
  2. 2. The motor assembly of a micro fan according to claim 1, wherein the housing (110) is provided with a mounting groove (1111), the mounting portion (1112) and the protruding portion (1113) are both disposed in the mounting groove (1111), and the flexible circuit board (130) is fixed to the mounting groove (1111).
  3. 3. The motor assembly of a micro fan according to claim 2, wherein the potting layer is provided in the mounting groove (1111) for sealing and fixing the flexible circuit board (130) and the plurality of coils (120) in the mounting groove (1111).
  4. 4. The motor assembly of a micro fan according to claim 2, wherein at least one through hole (1114) is provided on a bottom wall of the mounting groove (1111), and the through hole (1114) is used for accommodating an electrical component protruding from the flexible circuit board (130).
  5. 5. The motor assembly of a micro fan according to claim 2, wherein an opening (1115) communicating with the mounting groove (1111) is provided on the housing (110), and a portion of the flexible circuit board (130) protrudes from the opening (1115) to the housing (110) to be electrically connected to an external power source.
  6. 6. The motor assembly of a micro-fan according to any one of claims 1-5, wherein the housing (110) comprises: a bottom case (111), wherein the mounting portion (1112) and the protruding portion (1113) are provided on the bottom case (111); and a cover case (112), wherein the cover case (112) is detachably mounted to the bottom case (111).
  7. 7. A method of assembling a motor assembly for a micro fan, comprising: S1, fixing a flexible circuit board (130) on a shell (110); S2, sleeving a plurality of coils (120) on a plurality of protruding parts (1113) in a one-to-one correspondence manner, wherein the coils (120) are respectively and electrically connected with the flexible circuit board (130); and S3, pouring glue towards the shell (110) to form a glue pouring layer so as to fix the flexible circuit board (130) and the coil (120) to the shell (110).
  8. 8. The method for assembling a motor assembly of a micro fan according to claim 7, wherein the housing (110) comprises a bottom case (111) and a cover case (112), a mounting groove (1111) is provided on the bottom case (111), the protrusion (1113) is provided on a bottom wall of the mounting groove (1111), In step S1, the flexible circuit board (130) is adhered to the bottom wall of the mounting groove (1111); in step S2, the coil (120) is adhered to the bottom wall of the mounting groove (1111); In step S3, the glue-pouring layer is formed in the mounting groove (1111).
  9. 9. The method of assembling a motor assembly for a micro fan according to claim 8, further comprising, after step S3: s4, buckling the cover shell (112) on the bottom shell (111).
  10. 10. A micro fan, comprising a motor assembly of the micro fan according to any one of claims 1-6 and a fan blade (200), wherein the fan blade (200) comprises an impeller body (210) and a rotation shaft (220), the rotation shaft (220) is inserted into a mounting portion (1112), and the impeller body (210) is fixed to the rotation shaft (220).

Description

Motor assembly of miniature fan, assembling method and miniature fan Technical Field The present invention relates to the field of micro fans, and in particular, to a motor assembly of a micro fan, an assembling method of the motor assembly, and a micro fan. Background In the current micro motor manufacturing industry, a plurality of technical problems exist in the assembly process of the coil and the flexible circuit board. In the traditional manufacturing method, the coil is firstly arranged on a special jig, glue is then coated, the jig is assembled and cured after the flexible circuit board is covered, the product component of the flexible circuit board and the jig are separated and cleaned after the curing is finished, and the component of the flexible circuit board and the base are positioned. The coil and the jig are assembled and positioned in the traditional manufacturing method, concentricity and arrangement angle uniformity cannot be guaranteed, secondary positioning concentricity with the base is needed, the process is complex, precision is difficult to guarantee, the special jig needs repeated reverse die, process complexity is increased, meanwhile, after the flexible circuit board and the coil are solidified, glue residues are easy to occur when the coil is separated from the jig, enameled wires are easy to damage to cause scrapping of products, the back surface components of the base are only glued and protected, the waterproof grade requirement is not satisfied sufficiently, the traditional process is difficult to realize automatic production, production efficiency is low, consistency and stability of the products are poor, and the requirements of modern electronic products on high performance and high reliability of the miniature motor are difficult to be satisfied. Disclosure of Invention The first object of the present invention is to provide a motor assembly of a micro fan, which has the advantages of simple assembly process, high concentricity precision of products, precise angle of a coil arrangement array, precise size of parts, reduced risk of coil breakage damage, and good waterproof performance. The second object of the present invention is to provide an assembling method of a motor assembly of a micro fan, which has the advantages of simple process, high concentricity precision of products, precise angle of a coil arrangement array, precise size of parts, reduced risk of coil breakage and damage, and good waterproof performance. A third object of the present invention is to provide a micro fan, which has a simple assembly process, high reliability and good waterproof performance. To achieve the purpose, the invention adopts the following technical scheme: The invention discloses a motor assembly of a miniature fan, which comprises a shell, a flexible circuit board, a plurality of coils and a plurality of filling layers, wherein the shell is provided with a mounting part and a plurality of protruding parts, the protruding parts are arranged around the mounting part, the mounting part is used for mounting a rotating part, the flexible circuit board is mounted on the shell and is provided with an avoidance hole, the mounting part and the protruding parts are arranged in the avoidance hole, the coils are in one-to-one correspondence with the protruding parts and are electrically connected with the flexible circuit board, and the flexible circuit board and the coils are fixed on the shell through the filling layers. In some embodiments, the housing is provided with a mounting groove, the mounting portion and the protruding portion are both disposed in the mounting groove, and the flexible circuit board is fixed in the mounting groove. In some specific embodiments, the potting layer is disposed in the mounting groove, and the potting layer is used for sealing and fixing the flexible circuit board and the plurality of coils in the mounting groove. In some specific embodiments, at least one through hole is disposed on the bottom wall of the mounting groove, and the through hole is used for accommodating an electrical component protruding on the flexible circuit board. In some specific embodiments, an opening is provided in the housing in communication with the mounting slot, and a portion of the flexible circuit board extends from the opening to electrically connect the housing to an external power source. In some embodiments, the housing includes a bottom shell on which the mounting portion and the protruding portion are provided, and a cover shell detachably mounted to the bottom shell. The invention also discloses an assembling method of the motor component of the micro fan, which comprises the following steps: S1, fixing a flexible circuit board on a shell; S2, sleeving a plurality of coils on a plurality of convex parts in a one-to-one correspondence manner, wherein the coils are respectively and electrically connected with the flexible circuit board; And S3, pouring glue towards the