TWI459687B - Motor structure and foldable stator thereof - Google Patents

Description

Motor construction and its folded stator

The present invention relates to a motor construction, and more particularly to a motor construction having a folded stator, wherein the folded stator is formed in a folded manner by a flexible circuit board to simplify the process and improve the process yield, and The need to miniaturize the motor construction.

Referring to FIG. 1 , a conventional thin heat dissipation structure 10 includes a frame 11 , a circuit board 12 , a plurality of coils 13 , and a rotor 14 . In the process of the thin heat dissipation structure 10 , the system is prepared. The coils 13 are wound by a metal wire. After the coils 13 are completed, the coils 13 are respectively coupled to the circuit board 12, and the coils 13 are electrically connected to each other. Thereafter, The circuit board 12 and the rotor 14 are mounted on the frame 11 to form the thin heat dissipation structure 10. However, since the coils 13 are wound by the metal wires and recombined with the circuit board 12, the coils 13 cannot be reached. The need for miniaturization, and when one of the coils 13 is not electrically connected to the circuit board 12, the rotor 14 of the thin heat dissipation structure 10 cannot be magnetically coupled to the coils 13 and cannot be rotated, so This leads to an increase in the rate of process failure.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a motor construction that simplifies the assembly process, increases process yield, and allows the motor construction to be miniaturized.

A motor structure of the present invention comprising at least a rotor and a folded stator, the rotor having a magnet, the folded stator being flexible The flexible circuit board is formed in a folded manner. The folded stator includes a flexible carrier and an induction coil circuit. The flexible carrier has at least a plurality of first carrying portions and a plurality of second carrying portions, and the first The carrying portion is alternately stacked with the second carrying portions to form a folded carrier. The induction coil circuit has at least a plurality of first winding lines and a plurality of second winding lines, and each of the first winding lines is disposed in each of the plurality of winding lines. a first carrying portion, each of the second winding lines is disposed on each of the second carrying portions, and the magnet of the rotor generates magnetic interlinkage induction with the first winding lines and the second winding lines to drive the rotor Rotation, compared with the prior art, the present invention has a simplified assembly process and can improve the process yield, and can meet the demand for miniaturization.

Referring to FIG. 2, which is a first embodiment of the present invention, a motor structure 100 can be applied to a thin heat dissipation fan. The motor structure 100 includes at least a rotor 110, a folded stator 120, and a bearing 130. In this embodiment, the rotor 110 has a magnet 111, a trough 112, and a shaft 113. The magnet 111 is disposed on the trough 112. In the embodiment, the folded stator 120 is flexible. The folding circuit board 120 is formed by folding the flexible circuit board in a zigzag manner. Referring to FIGS. 3 and 4, the folding stator 120 is not shown before folding. The folding stator 120 includes a flexible carrier 121 and an induction coil circuit 122. Referring to FIG. 4, the flexible carrier 121 has an upper surface 121a and a lower surface 121b. In this embodiment, the induction coil circuit The 122 is disposed on the upper surface 121a and the lower surface 121b, or the induction coil circuit 122 may be disposed on one of the upper surface 121a or the lower surface 121b. Preferably, the folding The stator 120 further includes a protective layer P covering the induction coil circuit 122 to protect the induction coil circuit 122. Referring to Figures 3 and 4, the flexible carrier 121 has a plurality of first The carrying portion 123, the plurality of second carrying portions 124, and the plurality of bent portions 125 are located between the adjacent first carrying portions 123 and the second receiving portions 124. In the fifth and sixth figures, the flexible circuit board is folded in a 〞Z-fold manner to form the folded stator 120. The first carrying portions 123 are stacked with the second carrying portions 124 to form a fold. For the carrier A, please refer to FIGS. 3 and 4, the induction coil circuit 122 has a plurality of first winding lines 126, a plurality of second winding lines 127 and a plurality of connecting lines 128. The first winding lines 126 are electrically connected. The second winding circuit 127 is connected to each other. In the embodiment, each of the connecting lines 128 is located between the adjacent first winding lines 126 and each of the second winding lines 127, and each connecting line 128 Electrically connecting each of the adjacent first winding lines 126 and each of the second windings Each of the first winding lines 126 is disposed on each of the first carrying portions 123, and each of the second winding lines 127 is disposed on each of the second carrying portions 124, and each of the connecting lines 128 is disposed in each of the first winding portions 127. For the bending portion 125, please refer to FIGS. 4 and 5, the first carrying portion 123 and the second carrying portions 124 are alternately stacked in a zigzag manner to form the folded carrier A, and the bending portions are formed. The portion of the first carrier portion 123 and each of the second carrier portions 124 are at least between Having a first winding line 126 and a second winding line 127, or having a first winding line 126 and a second winding line 127 between the first carrying portion 123 and the second carrying portion 124 Please refer to Figures 2 and 8, the magnet 111 of the rotor 110 and the fold The first winding lines 126 of the stacked stators 120 and the second winding lines 127 generate magnetic interlinkage induction to drive the rotor 110 to rotate.

Referring to FIG. 8A , in another embodiment, the folded stator 120 is also a flexible circuit board. The flexible carrier 121 has only a first carrying portion 123 and a second carrying portion 124 . The second carrier portion 124 is stacked on the first carrier portion 123 to form a folded carrier A. Referring to FIG. 8B, the induction coil circuit 122 has only a first winding line 126 and a second winding line 127. The first winding circuit 126 is electrically connected to the second winding circuit 127. The first winding circuit 126 is disposed on the first bearing portion 123. The second winding circuit 127 is disposed on the second carrier portion 124. 8A and 8B, the magnet 111 of the rotor 110 can be magnetically coupled to the first winding line 126 and the second winding line 127. Referring to FIG. 8B, the first carrier portion 123 and the first portion The second carrying portion 124 has at least a first winding line 126 and a second winding line 127, or see FIG. 8C, having a first between the first carrying portion 123 and the second carrying portion 124. One of the winding line 126 and a second winding line 127, or see In FIG. 8D, the first winding line 126 and the second winding line 127 are located outside the first carrying portion 123 and the second carrying portion 124 of the folded carrier A.

Please refer to the figures of FIG. 3, FIG. 5 and FIG. 6 . Preferably, the first carrying portions 123 respectively have a first mark 123a, and the second carrying portions 124 respectively have a second mark 124a. When the portion 123 and the second carrying portions 124 are alternately stacked into the folded carrier A, the first marks 123a are corresponding to the second marks 124a so as to be located in the first carrying portions 123 and the second portions. The first winding line 126 and the second winding line 127 between the carrying portions 124 are aligned, wherein the first marks 123a and the first The second mark 124a can be a perforation, a groove or a notch. In this embodiment, the first mark 123a and the second mark 124a are perforated, and the folded stator 120 further includes a positioning pin 129a. The positioning pin 129a is disposed through the first mark 123a and the second mark 124a to fix the folded stator 120 to prevent the folding stator 120 from being modified. Alternatively, referring to FIG. 7 , in another embodiment, the folded stator 120 is another encapsulant 129 b , and the encapsulant 129 b is coated on the folded carrier A for gluing and fixing the folded carrier. A.

The first and second winding portions 126 are respectively disposed outside the first through hole 123b. The second bearing portions 124 are respectively disposed on the outer side of the first through hole 123b. There is a second through hole 124b, each of the second winding lines 127 is disposed outside the second through hole 124b, and the first through holes 123b are corresponding to the second through holes 124b, please refer to Figures 2 to 8, the bearing The first through hole 123b of the first bearing portion 123 and the second through holes 124b of the second bearing portion 124 are inserted through the bearing 130. The rotor 110 is inserted through the bearing 130. The magnet 111 is magnetically coupled to the folded stator 120 to make the rotor 110 rotatable.

Referring to FIGS. 2-8, the motor structure 100 further includes a driving circuit board 140. The folding stator 120 is electrically connected to the driving circuit board 140. In the embodiment, the folding stator 120 and the same The drive circuit board 140 is the same flexible circuit board.

Referring to FIGS. 9 and 10 , which are a second embodiment of the present invention, a motor structure 100 further includes a stator holder 150 having a hollow frame 151 and being fixed to the frame 151 . a plurality of fixed arms 152, wherein the fixed arms 152 are respectively disposed on the first carrying portions The first through holes 123b of the 123 and the second through holes 124b of the second carrying portions 124, and the first winding lines 126 and the second winding lines 127 are directed toward the rotor.

According to the present invention, the folded stator 120 is formed by a flexible circuit board in a Z-fold manner, thereby simplifying the assembly process and improving the process yield, and achieving the demand for miniaturization.

The scope of the present invention is defined by the scope of the appended claims, and any changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention are within the scope of the present invention. .

10‧‧‧Thin heat dissipation structure

11‧‧‧ frame

12‧‧‧ boards

13‧‧‧ coil

14‧‧‧Rotor

100‧‧‧Motor construction

110‧‧‧Rotor

111‧‧‧ Magnet

112‧‧‧Valley

113‧‧‧ shaft

120‧‧‧Folding stator

121‧‧‧Flexible carrier

121a‧‧‧ upper surface

121b‧‧‧ lower surface

122‧‧‧Induction coil circuit

123‧‧‧First load bearing department

123a‧‧‧ first mark

123b‧‧‧first perforation

124‧‧‧Second load bearing department

124a‧‧‧second mark

124b‧‧‧second perforation

125‧‧‧Bend

126‧‧‧First winding circuit

127‧‧‧second winding circuit

128‧‧‧Connected lines

129a‧‧ Locating pin

129b‧‧‧Package colloid

130‧‧‧ bearing

140‧‧‧Drive circuit board

150‧‧‧ stator holder

151‧‧‧ frame

152‧‧‧Fixed Arm

A‧‧‧Folding carrier

P‧‧‧ protective layer

Figure 1: An exploded perspective view of a conventional thin heat sink structure.

Figure 2 is an exploded perspective view of a motor construction in accordance with a first embodiment of the present invention.

Figure 3: A schematic view of a folded stator prior to unfolding in accordance with the first embodiment of the present invention.

Figure 4 is a cross-sectional view of the folding stator in an unfolded state in accordance with the first embodiment of the present invention.

Figure 5 is a schematic view showing the folding of the folded stator according to the first embodiment of the present invention.

Fig. 5A is a partially enlarged cross-sectional view showing the folded stator according to the first embodiment of the present invention.

Figure 6 is a cross-sectional view of the folded stator in accordance with the first embodiment of the present invention.

Figure 7 is another perspective exploded view of the motor construction in accordance with the first embodiment of the present invention.

Figure 8 is a cross-sectional view showing the structure of the motor in accordance with the first embodiment of the present invention.

Figure 8A is a cross-sectional view of the motor construction in accordance with another embodiment of the present invention.

Figure 8B is a cross-sectional view of the folded stator in accordance with another embodiment of the present invention.

Figure 8C is a cross-sectional view of the folded stator in accordance with another embodiment of the present invention.

Figure 8D is a cross-sectional view of the folded stator in accordance with another embodiment of the present invention.

Figure 9: According to a second embodiment of the invention, the folded stator is coupled to the upper view of the stator mount.

Fig. 10 is a cross-sectional view taken along the line A-A of Fig. 9.

100‧‧‧Motor construction

110‧‧‧Rotor

111‧‧‧ Magnet

112‧‧‧Valley

113‧‧‧ shaft

120‧‧‧Folding stator

130‧‧‧ bearing

140‧‧‧Drive circuit board

Claims (14)

A motor structure comprising: a rotor having a magnet; and a folded stator is a flexible circuit board comprising: a flexible carrier having a plurality of first carrier portions and a plurality of a second carrying portion, each of the first carrying portions has a first mark, and the second carrying portions respectively have a second mark, and the first carrying portions are stacked with the second carrying portions to form a folding carrier, the first markings corresponding to the second markings; and an induction coil circuit having a plurality of first winding lines and a plurality of second winding lines, the first winding lines being electrically connected Each of the second winding lines is disposed on each of the first carrying portions, and each of the second winding lines is disposed on each of the second carrying portions, the magnet of the rotor and the first windings The line and the second winding lines generate magnetic interlinkage sensing. The motor structure of claim 1, wherein the flexible carrier further has a plurality of bending portions, the induction coil circuit further has a plurality of connecting lines, each of the bending portions being located adjacent to each other Between the first carrying portion and each of the second carrying portions, each of the connecting lines is located between each of the adjacent first winding lines and each of the second winding lines, and each of the connecting lines is electrically connected adjacent to each other Each of the first winding lines and each of the second winding lines is disposed on each of the bent portions. The motor structure of claim 1, wherein the folding stator further comprises a positioning pin, and the first markings and the second markings are perforations, and the positioning pins are threaded through the plurality of a mark and the second mark. The motor structure of claim 1, wherein the folded stator further comprises an encapsulant coated on the folded carrier. The motor structure of claim 1, wherein the first bearing portions respectively have a first through hole, each of the first winding lines is disposed outside the first through hole, and the second carrying portions respectively have a second through hole, each of the second winding lines is disposed outside the second through hole, and the first through holes are corresponding to the second through holes. The motor structure of claim 5, further comprising a fixed sub-frame having a frame body and a plurality of fixed arms, wherein the fixed arm portions are respectively disposed on the first load-bearing portions The first through holes and the second through holes of the second carrying portions. The motor structure of claim 1, further comprising a driving circuit board electrically connected to the driving circuit board. The motor structure of claim 7, wherein the folded stator and the drive circuit board are the same flexible circuit board. A folding stator of a motor can be magnetically coupled to a magnet of a rotor. The folded stator is a flexible circuit board comprising: a flexible carrier having a plurality of first carriers And a plurality of second carrying portions, each of the first carrying portions has a first mark, and the second carrying portions respectively have a second mark, and the first carrying portions are stacked with the second carrying portions. And forming a folded carrier, the first markings corresponding to the second markings; and an induction coil circuit having a plurality of first winding lines and a plurality of second winding lines, the first winding lines being electrically The second winding lines are connected to each of the first winding lines, and each of the first winding lines is disposed on each of the first carrying portions. The folding stator of the motor of claim 9, wherein the flexible substrate further has a plurality of bending portions, the induction coil circuit further has a plurality of connecting lines, each of the bending portions being adjacent to each other Between each of the first carrying portions and each of the second carrying portions, each of the connecting lines is located between each of the adjacent first winding lines and each of the second winding lines, and each of the connecting lines is electrically Each of the adjacent first winding lines and each of the second winding lines is connected, and each of the connecting lines is disposed at each of the bent portions. The folding stator of the motor of claim 9, wherein the first carrier portion and the second carrier portion of the folded carrier have at least a first winding line and a second winding line One of them. The folding stator of the motor of claim 10, wherein the bent portions are located on an outer side of the folded carrier. The folding stator of the motor of claim 9, wherein the folding stator further comprises a positioning pin, and the first markings and the second markings are perforations, and the positioning pins are threaded through The first marks and the second marks. The folding stator of the motor of claim 9, wherein the folded stator further comprises an encapsulant coated on the folded carrier.