CN1257599C - Fixing device for circuit board - Google Patents

Abstract

The invention discloses a fixing device of a circuit board, which comprises a stator coil group and the circuit board provided with a Hall sensor and a control element, wherein the stator coil group is provided with a coil, a magnetic pole piece, an insulating plate and a shaft hole which can be penetrated by a shaft tube; the circuit board is provided with an embedding part which can be embedded in the embedding groove of the stator coil group. It combines conveniently and can reduce the space that the circuit board occupy.

Description

Fixing device for circuit board

technical field

The invention relates to a fixing device for a circuit board, in particular to a fixing device which is convenient to combine and reduces the space occupied by the circuit board.

Background technique

Taiwan Patent Publication No. 274394 "Stator Structure of Brushless DC Motor" patent discloses stator coils and commutation control circuit boards, wherein the stator coil seat includes a first coil seat and a second coil seat, the first coil seat and The second coil base clamps the winding group and the iron core in the way of clamping above and below. The bottom end of the second coil base extends downwards at least a pair of buckling elements, and the commutation control circuit board is provided with the buckling elements. Corresponding holes allow the stator coils to be fixed on the periphery of the circuit board through the holding element, and a lead wire gap is provided to guide the winding taps of the winding group to wind to the corresponding circuit contacts at the bottom of the commutation control circuit board and weld and fix them.

In the structure disclosed in this patent case, the circuit board is a circular plate, and the diameter of the circuit board is larger than the diameter of the stator coil group, protruding outside, which is mainly the Hall sensor on the circuit board, which needs to be corresponding to The pole edge of the stator coil group is below the pole edge. Therefore, the diameter of the circuit board needs to be larger than the diameter of the stator coil group, so that the Hall sensor is fixed on the circuit board. In addition, after the stator coil group is combined with the circuit board, the buckle between them The holding element will protrude from the bottom side of the circuit board. In this way, when the circuit board needs to be combined with related products, an irreducible space will be formed between them. On the whole, due to the limitation of the combination structure of the circuit board and the stator coil, the brushless The diameter and height of the DC motor are increased, which greatly affects the universal range of the product.

In addition, because the diameter of the existing circuit board is larger than that of the stator coil group, it is necessary to set up a lead wire gap at the periphery of the circuit board, so that the lead wire connecting the coil group is concealed in the position of the gap, so that the circuit board can be relatively The use of area is reduced, and the opening of the notch needs to be increased by increasing the diameter. Since the circuit board needs to open a notch, the cost increases.

Contents of the invention

The object of the present invention is to provide a circuit board fixing device, which is convenient to combine and can reduce the space occupied by the circuit board.

The object of the present invention is achieved in this way: a fixing device for a circuit board includes a stator coil group and a circuit board provided with a Hall sensor and a control element, the stator coil group is provided with a coil, a magnetic pole piece, an insulating plate and a shaft The shaft hole through which the tube passes, the coil is arranged in the insulating plate, the magnetic pole pieces are located on both sides of the insulating plate, the edge of the insulating plate is provided with a lead groove for the lead wire to pass through, and the insulating plate is provided with an embedding groove; the circuit board is provided with a The insertion part that fits into the slot of the stator coil group.

The insulation board is divided into several areas, the embedding grooves are arranged in different areas, and the circuit board has corresponding embedding parts.

The insertion part on the circuit board protrudes with a smaller width relative to the circuit board.

The insertion parts on the circuit board are two corresponding sides of the circuit board.

The insertion part of the circuit board is fitted and fixed in the insertion groove of the insulating board.

A fixing device for a circuit board, comprising a stator coil group, a circuit board provided with a Hall sensor and a control element, and a fixture, the stator coil group is provided with a coil, a magnetic pole piece, an insulating plate and a shaft hole through which a shaft tube can pass , the coil is arranged in the insulating plate, the magnetic pole pieces are located on both sides of the insulating plate, the edge of the insulating plate is provided with a lead groove for the lead wire to pass through; the circuit board is provided with an inserting part; the fixture is provided with an inserting part for the circuit board The inner part fits the slot, and the shaft tube fixes the stator coil group on the fixture.

The insertion part of the circuit board is fitted and fixed in the slot of the fixture.

The fixing object is provided with a positioning piece capable of holding the circuit board power line.

The insertion part of the circuit board protrudes with a smaller width relative to the circuit board.

The insertion part of the circuit board is two corresponding sides of the circuit board.

A circuit board fixing device, comprising a stator coil group and a circuit board provided with a Hall sensor and a control element, the stator coil group is provided with a coil, a magnetic pole piece, an insulating plate and a shaft hole through which a shaft tube can pass. The coil is set in the insulating plate, the magnetic pole pieces are located on both sides of the insulating plate, the edge of the insulating plate is provided with a lead groove for the lead wire to pass through, the insulating plate is provided with two coupling columns, and the two coupling columns have corresponding embedded grooves; the circuit board is equipped with Insertion part that can be fitted into the slot of the stator coil group.

The insulation board is divided into several areas, and the two bonding posts are on the insulation boards in different areas.

The insertion part of the circuit board protrudes with a smaller width relative to the circuit board.

The insertion part of the circuit board is two corresponding sides of the circuit board.

The slot is in the same horizontal direction as the plane of the pole piece.

The planes of the slot and the pole piece are perpendicular to each other.

The combination column and the insulating plate are integrally formed.

The insertion part of the circuit board protrudes with a smaller width relative to the circuit board.

A fixing device for a circuit board, comprising a stator coil group, a circuit board provided with a Hall sensor and a control element, and a fixture, the stator coil group is provided with a coil, a magnetic pole piece, an insulating plate and a shaft hole through which a shaft tube can pass , the coil is arranged in the insulating plate, the pole pieces are located on both sides of the insulating plate, the edge of the insulating plate is provided with a lead groove for the lead wire to pass through; the circuit board is provided with an insertion part; The column has corresponding embedding grooves, and the embedding grooves are fitted with the embedding parts of the circuit board, and the shaft tube fixes the stator coil group on the fixed object.

The insertion part of the circuit board protrudes with a smaller width relative to the circuit board.

The insertion part of the circuit board is two corresponding sides of the circuit board.

The insertion part of the circuit board is fitted and fixed in the slot of the fixture.

The fixture is provided with a positioning piece that blocks the power supply of the circuit board.

The slot is in the same horizontal direction as the plane of the pole piece.

The planes of the slot and the pole piece are perpendicular to each other.

A circuit board fixing device, comprising a stator coil group and a circuit board provided with a Hall sensor and a control element, the stator coil group is provided with a coil, a magnetic pole piece, an insulating plate and a shaft hole through which a shaft tube can pass. The coil is set in the insulating plate, the magnetic pole pieces are located on both sides of the insulating plate, the edge of the insulating plate is provided with a lead groove for the lead wire to pass through, the insulating plate is provided with two joint blocks, and the two joint blocks have the same direction of the embedded groove; the circuit board is provided with Insertion part that can be fitted into the slot of the stator coil group.

The insulating board is divided into several areas, and the bonding blocks are arranged in different areas.

The slot of the insulating plate is in the same horizontal direction as the plane of the pole piece.

The slot of the insulating plate is perpendicular to the plane of the pole piece.

The insertion part of the circuit board is an open slot on the same side.

The two combining blocks have the same horizontal and vertical slots as the plane direction of the magnetic pole piece.

A fixing device for a circuit board, comprising a stator coil group, a circuit board provided with a Hall sensor and a control element, and a fixture, the stator coil group is provided with a coil, a magnetic pole piece, an insulating plate and a shaft hole through which a shaft tube can pass , the coil is arranged in the insulating plate, the magnetic pole pieces are located on both sides of the insulating plate, the edge of the insulating plate is provided with a lead groove for the lead wire to pass through; the circuit board is provided with an insertion part; The blocks have slots with the same orientation, and the slots are fitted with the plug-in parts of the circuit board, and the shaft tube fixes the stator coil group on the fixed object.

The socket of the combination block is in the same horizontal direction as the plane direction of the fixture.

The socket of the combination block is perpendicular to the plane of the fixture.

The insertion part of the circuit board is an open slot on the same side.

The two combining blocks have the same horizontal and vertical slots as the plane direction of the magnetic pole piece.

The fixing object is provided with a locating piece for clamping the power line of the circuit board.

In the present invention, since the circuit board with a small area is directly embedded on the insulating plate of the stator or other fixed objects, the combination of the stator coil group and the circuit board only occupies a small space, thereby expanding its application range.

Description of drawings

1 is an exploded perspective view of a first embodiment of the present invention;

Fig. 2 is a combination diagram of the first embodiment of the present invention;

3 is an exploded perspective view of a second embodiment of the present invention;

Fig. 4 is a combination diagram of the second embodiment of the present invention;

Fig. 5 is an exploded perspective view of a third embodiment of the present invention;

Fig. 6 is a combination diagram of the third embodiment of the present invention;

Fig. 7 is an exploded perspective view of a fourth embodiment of the present invention;

Figure 8 is a combination diagram of the fourth embodiment of the present invention;

Fig. 9 is an exploded perspective view of a fifth embodiment of the present invention;

Fig. 10 is a combination diagram of the fifth embodiment of the present invention;

Fig. 11 is an exploded perspective view of the sixth embodiment of the present invention;

Fig. 12 is a combination diagram of the sixth embodiment of the present invention;

Fig. 13 is an exploded perspective view of the seventh embodiment of the present invention;

Fig. 14 is a combination diagram of the seventh embodiment of the present invention;

Fig. 15 is an exploded perspective view of the eighth embodiment of the present invention;

Fig. 16 is a combination diagram of the eighth embodiment of the present invention;

Fig. 17 is an exploded perspective view of yet another combination example of the eighth embodiment of the present invention;

Fig. 18 is a combination diagram of yet another combination example of the eighth embodiment of the present invention;

Fig. 19 is an exploded perspective view of the ninth embodiment of the present invention;

Fig. 20 is a combination diagram of the ninth embodiment of the present invention;

Fig. 21 is an exploded perspective view of yet another combination example of the ninth embodiment of the present invention;

Fig. 22 is a combination diagram of yet another combination example of the ninth embodiment of the present invention.

Detailed ways

The invention provides a fixing device for a circuit board. A circuit board with a small area can be directly embedded on the insulating plate of the stator coil group or other fixtures. The circuit board is hidden on the bottom side of the stator coil group. The insulating plate of the stator coil group is provided with an integrated lead wire groove, so that the lead wire can be directly pulled to the circuit board.

As shown in FIG. 1 , the first embodiment of the present invention is composed of a stator coil group 10 and a circuit board 20 .

The stator coil group 10 can be formed by various existing winding methods, and the number of its magnetic poles can also be designed according to various needs. The stator coil group 10 is wound with a coil 101, and the shaft hole 102 is combined with a shaft tube; the stator coil Group 10 has an insulating plate 103 of insulating material, and the insulating plate 103 can be a single plate or cover. The insulating plate 103 is divided into several zones by the magnetic pole piece 107, and the insulating plate 103 in one zone is provided with a slot 104, and the edge is provided with There are lead grooves 105 and embedded grooves 104 for the insertion of the insertion part 203 of the circuit board 20. If necessary, the two can also be tightly fitted, or fixed by adhesives, etc., so that the two are firmly combined. 105 for the lead wire 106 of the coil 101 to pass through.

The circuit board 20 has a small area, on which Hall sensors 201 and other necessary control elements 202 are arranged, and the circuit board 20 is provided with an insertion part 203, the width of the insertion part 203 is small, and the insertion part 203 is embedded Inserted into the slot 104 of the insulating board 103, and the circuit board 20 is provided with a power line 204, which can be used for power or signal transmission.

As shown in Figure 2, it is the combined situation of the first embodiment, the insertion part 203 of the circuit board 20 is directly inserted into the insertion groove 104 of the insulating plate 103, therefore, the circuit board 20 is fixed, and the lead wire of the coil 101 106 can be fixed on the circuit board 20 by the lead groove 105, and the lead 106 will not be exposed outside.

As shown in Figure 3, in the second embodiment of the present invention, the stator coil group 11 is provided with a coil 111 and a shaft hole 112, and the stator coil group 11 is provided with an insulating plate 113, and the insulating plate 113 is divided into several areas by the magnetic pole pieces 117, Wherein the insulation board 113 of two adjacent districts is respectively provided with embedding groove 114, and the end edge of insulation board 113 in one district is provided with lead groove 115, and embedding groove 114 is for the embedding part 213 of circuit board 21 to insert, and lead wire groove 115 The lead wire 116 of the coil 111 is passed through.

The circuit board 21 is provided with a Hall sensor 211 and other necessary control elements 212, and the circuit board 21 itself is provided with an insertion part 213, and the insertion part 213 is inserted in the insertion groove 114 of the insulating plate 113, and the circuit board 21 is provided with Power cord 214.

As shown in Figure 4, in the combination of the second embodiment, the insertion part 213 of the circuit board 21 is directly inserted into the slot 114 of the insulating plate 113, so that the circuit board 21 is fixed, and the lead wire 116 of the coil 111 That is, it can be fixed on the circuit board 21 by the lead groove 115, and the lead wire 116 will not be exposed outside.

As shown in FIG. 5 , the third embodiment of the present invention is composed of a stator coil group 12 , a circuit board 20 and a fixture 30 .

The stator coil group 12 is provided with a coil 121 , a shaft hole 122 , an insulating plate 123 , a lead slot 124 , a lead wire 125 , etc., and the shaft tube 301 passes through the shaft hole 122 of the stator coil group 12 and is set in the fixture 30 .

Fixture 30 can be existing base plate or casing itself, is provided with slot 302 on it, and slot 302 is inserted for circuit board 20, and fixation 30 is provided with locating member 303 such as hook in addition, makes circuit board 20 The power cord 204 can be blocked to prevent the power cord 204 from being pulled off.

The circuit board 20 is provided with a Hall sensor 201 , other necessary control elements 202 , and a power cord 204 , and an inserting portion 203 is provided on it to be inserted into the inserting groove 302 of the fixture 30 .

As shown in FIG. 6 , in the combination of the third embodiment, the insertion part 203 of the circuit board 20 is inserted into the slot 302 of the fixture 30 , and the power cord 204 of the circuit board 20 is stuck in the positioning member 303 , The shaft tube 301 passes through the shaft hole 122 of the stator coil assembly 12 and is sleeved in the fixture 30 , that is, a stator is formed.

As shown in FIG. 7 , the fourth embodiment is composed of a stator coil group 40 and a circuit board 50 .

The stator coil group 40 is provided with a coil 401 , a shaft hole 402 , an insulating plate 403 , a lead slot 404 , and a lead wire 405 . The insulating plate 403 is divided into several areas by the magnetic pole piece 408, and the insulating plate 403 provided with the lead groove 404 is provided with two coupling columns 406, and the two coupling columns 406 are provided with corresponding embedding grooves 407, and the embedding grooves 407 are used for embedding of the circuit board 50. The insertion part 503 is embedded, and the coupling column 406 and the insulating plate 403 can be integrally formed, and it is most suitable to integrally form the two with plastic material.

The circuit board 50 is provided with a Huoyu sensor 501, other necessary control elements 502, and a power cord 504. The circuit board 50 itself is provided with an insertion 503. The insertion portion 503 can be formed by two corresponding sides, and the insertion portion 503 can be inserted into the In the slot 407 of the stator coil group 40 .

As shown in FIG. 8 , in the combination of the fourth embodiment, the inserting portions 503 on two corresponding sides of the circuit board 50 are inserted into the inserting grooves 407 of the stator coil assembly 40 to form a stator.

As shown in FIG. 9 , the fifth embodiment is composed of a stator coil group 12 , a circuit board 50 and a fixture 31 .

The stator coil group 12 is provided with coils 121 , shaft holes 122 , insulating plates 123 , lead wire slots 124 , lead wires 125 , etc., and the shaft tube 301 passes through the shaft holes 122 of the stator coil group 12 and is set in the fixture 31 .

The circuit board 50 is provided with a Hall sensor 501, other necessary control elements 502, and a power cord 504. The circuit board 50 itself is provided with an insertion part 503, which can be formed by two corresponding sides, and the insertion part 503 can be inserted In the slot 312 of the fixture 31 .

The fixture 31 is provided with two coupling columns 311, and the two coupling columns 311 are provided with corresponding inserting grooves 312, and the inserting grooves 312 are used for inserting the insertion part 503 of the circuit board 50, and the fixture 31 is further provided with a positioning piece 313, so that The power cord 504 of the circuit board 50 can be attached to prevent the power cord 504 from being pulled off.

As shown in Figure 10, in the combination of the fifth embodiment, the insertion part 503 of the circuit board 50 is inserted into the slot 312 of the fixture 31, and the stator coil group 12 is combined on the fixture 31 through the shaft tube 301, that is, a fixed.

As shown in FIG. 11 , the sixth embodiment is composed of a stator coil group 41 and a circuit board 50 .

The stator coil group 41 is provided with a coil 411 , a shaft hole 412 , an insulating plate 413 , a lead slot 414 , and a lead wire 415 . The insulating plate 413 is divided into several areas by the magnetic pole piece 417, and the insulating plate 413 in two adjacent areas is respectively provided with a coupling column 416, and the two coupling columns 416 are provided with corresponding grooves in the same horizontal direction as the plane of the magnetic pole piece 417 418 , the inserting groove 418 is used for inserting the inserting portion 503 of the circuit board 50 .

The circuit board 50 is provided with a Hall sensor 501 and other necessary control elements 502, and a power line 504. The circuit board 50 itself is provided with an insertion part 503, which can be formed by two corresponding sides, and the insertion part 503 can be embedded Inserted in the horizontal slot 418 of the stator coil group 41 .

As shown in FIG. 12 , in the combination of the sixth embodiment, the inserting portion 503 at the end of the circuit board 50 is inserted into the slot 418 of the stator coil assembly 41 to form a stator.

As shown in FIG. 13 , the seventh embodiment is composed of a stator coil group 12 , a circuit board 50 and a fixture 32 .

The stator coil group 12 is provided with coils 121 , shaft holes 122 , insulating plates 123 , lead wire slots 124 , lead wires 125 , etc., and the shaft tube 301 passes through the shaft holes 122 of the stator coil group 12 and is sleeved in the fixture 32 .

The circuit board 50 is provided with a Hall sensor 501, other necessary control elements 502, and a power cord 504. The circuit board 50 itself is provided with an insertion part 503, which can be formed by two corresponding sides, and the insertion part 503 can be inserted In the slot 322 of the fixture 32 .

The fixture 32 is provided with two coupling columns 321, and the two coupling columns 321 are provided with corresponding slots 322 which are in the same horizontal direction as the plane of the fixture 32, and the slots 322 are used for inserting the insertion part 503 of the circuit board 50. , the fixing object 32 is further provided with a positioning member 323, so that the power cord 504 of the circuit board 50 can be attached to prevent the power cord 504 from being pulled off.

As shown in Figure 14, in the combination of the seventh embodiment, the insertion part 503 of the circuit 50 is inserted into the insertion groove 322 of the fixture 32, and the stator coil group 12 is combined with the fixture 32 through the shaft tube 301, that is, a certain shape is formed. son.

As shown in FIG. 15 , the eighth embodiment is composed of a stator coil group 60 and a circuit board 70 .

The stator coil assembly 60 is provided with a coil 601 , a shaft hole 602 , an insulating plate 603 , a lead slot 604 , a lead wire 605 , and a magnetic pole piece 606 . The insulating plate 603 is divided into several areas by the magnetic pole piece 606, and the insulating plate 603 is provided with a protruding joint block 607, and the joint block 607 is provided with a slot 608, and the slot 608 can be in the same horizontal direction as the plane of the magnetic pole piece 606 Or in a direction perpendicular to each other, the insertion groove 608 can be inserted into the insertion portion 703 of the circuit board 70 .

The circuit board 70 is provided with a Hall sensor 701 and other necessary control elements 702, and a power cord 704. The circuit board 70 itself is provided with an insertion part 703, which can be an open slot on the same side, and the insertion part 703 Embedding with the slot 608 of the stator coil group 60

As shown in FIG. 16 , in the combination of the eighth embodiment, the inserting portion 703 of the circuit board 70 is inserted into the slot 608 of the stator coil assembly 60 to form a stator.

As shown in Figures 17 and 18, in yet another combination example of the eighth embodiment, the circuit board 70 and the pole piece 606 are placed in the same horizontal direction, and the insertion part 703 is inserted into the transverse insertion groove 608 of the stator coil group 60, Therefore, a smaller thickness stator can be formed.

As shown in FIG. 19 , the ninth embodiment is composed of a stator coil group 12 , a circuit board 70 , and a fixture 80 .

The stator coil group 12 is provided with a coil 121 , a shaft hole 122 , an insulating plate 123 , a lead slot 124 , a lead wire 125 , etc., and the shaft hole 122 of the stator coil group 12 is connected to the fixture 80 through the shaft tube 301 .

The circuit board 70 is provided with a Hall sensor 701 and other necessary control elements 702, a power cord 704, and the circuit board 70 itself is provided with an insertion part 703, which can be a recessed opening groove, by which the insertion part 703 The circuit board 70 has a power cord 704 and is inserted into the slot 802 of the fixture 80 .

The fixture 80 is provided with two protruding joint blocks 801, and the joint block 801 has a slot 802, the slot 802 can be in the same horizontal direction as the plane of the fixture 80 or be perpendicular to each other, and the slot 802 can be used for the circuit board 70. The inserting part 703 is inserted, and the fixing object 80 is provided with a positioning part 803, so that the power cord 704 of the circuit board 70 can be attached to prevent the power cord 704 from being pulled off.

As shown in FIG. 20 , in the combination of the ninth embodiment, the insertion part 703 of the circuit board 70 is inserted into the slot 802 of the fixture 80 , once the stator coil group 12 is combined with the fixture 80 through the shaft tube 301 , That is, a certain stator is formed.

As shown in Figures 21 and 22, in another combination example of the ninth embodiment, the circuit board 70 is in the same horizontal direction as the plane of the fixture 80, and the insertion part 703 is inserted into the transverse slot of the fixture 80. 802, therefore, can be formed with a smaller thickness.

According to the structure of the present invention, the circuit board has only a small volume and is directly attached to the insulating plate or fixture of the stator coil group. At the same time, the insulating plate is directly provided with a lead groove, which can prevent the lead wire from being exposed and scratched. The combination of the stator and the rotor can be used in a wider range.

According to the structure of the present invention, the design of the circuit board can form a long and narrow design, so that the height of the circuit board can be reduced when it is inserted into the insulating board.

According to the structure of the present invention, when the insertion part of the circuit board forms a protrusion with a small width, the layout area of the circuit board can be increased.

According to the structure of the present invention, the insertion part of the circuit board is formed on two corresponding sides of the circuit board, which can reduce the height of the circuit board protruding from the stator coil group, so that it can be applied to stator design occasions requiring a smaller height.

According to the structure of the present invention, after the circuit board is embedded in the insulating board or the fixture, the two are fixed by various fixing methods, so that the circuit board can be fixed more firmly without falling off.

In the structure of the present invention, the fixture formed by the casing or the base plate is provided with a slot for embedding the circuit board, so that the diameter of the stator coil group can be formed into any small size, and there is no problem that the stator coil group cannot be fixed. The problem of setting the slot on the insulation board.

According to the structure of the present invention, a positioning piece is provided on the fixing object, so that the power line of the circuit board can be attached. In this way, when the power line is pulled accidentally, since the power line has been fixed on the positioning piece, Its pulling force will not cause the welding point of the power line and the circuit board to be pulled off.

According to the structure of the present invention, when the slot and the plane of the magnetic pole piece are in the same horizontal direction, the entire stator can form the minimum height, so that it can be designed according to the needs of various products.

According to the structure of the present invention, the combination column and the insulating plate are integrally formed, which can provide more convenient processing and reduce processing procedures to reduce production costs.

According to the structure of the present invention, when the inserting part of the circuit board is provided with an open groove on the same side, when the inserting groove is fitted with each other, there is a small amount of protrusion, so that the height of the entire stator can be reduced.

In the structure of the present invention, the combination block has both horizontal and vertical embedding grooves, so that the embedding of the circuit board can have the convenience of selection.

Claims (37)

1. A fixing device for a circuit board, comprising a stator coil group and a circuit board provided with a Hall sensor and a control element, characterized in that: the stator coil group is provided with a coil, a magnetic pole piece, an insulating plate and can be passed through by a shaft tube shaft hole, the coil is arranged in the insulating plate, the magnetic pole pieces are located on both sides of the insulating plate, the edge of the insulating plate is provided with a lead groove for the lead wire to pass through, and the insulating plate is provided with an embedding groove; the circuit board is equipped with a The insertion part in the slot of the stator coil group. 2. A circuit board fixing device according to claim 1, characterized in that the insulating board is divided into several areas, the embedding grooves are provided in different areas, and the circuit board has corresponding inserting parts. 3. The circuit board fixing device according to claim 1, wherein the insertion portion on the circuit board protrudes with a smaller width than the circuit board. 4. A circuit board fixing device according to claim 1, characterized in that: the insertion parts on the circuit board are two corresponding sides of the circuit board. 5. A circuit board fixing device according to claim 1 or 2, characterized in that the insertion part of the circuit board is fitted and fixed in the insertion groove of the insulating board. 6. A fixing device for a circuit board, including a stator coil group, a circuit board with a Hall sensor and a control element, and a fixture, characterized in that: the stator coil group is provided with a coil, a magnetic pole piece, an insulating plate and a The shaft hole through which the tube passes, the coil is arranged in the insulating plate, the magnetic pole pieces are located on both sides of the insulating plate, the edge of the insulating plate is provided with a lead groove for the lead wire to pass through; the circuit board is provided with an insertion part; the fixture is provided with It is a fitting groove for the fitting part of the circuit board, and the shaft tube fixes the stator coil group on the fixed object. 7. A circuit board fixing device according to claim 6, wherein the insertion part of the circuit board is fitted and fixed in the slot of the fixture. 8. A circuit board fixing device as claimed in claim 6, wherein the fixing object is provided with a positioning piece capable of holding the circuit board power cord. 9. The circuit board fixing device according to claim 6, wherein the insertion part of the circuit board protrudes with a smaller width than the circuit board. 10. A circuit board fixing device according to claim 6, wherein the insertion part of the circuit board is two corresponding sides of the circuit board. 11. A fixing device for a circuit board, including a stator coil group and a circuit board provided with Hall sensors and control elements, characterized in that: the stator coil group is provided with coils, magnetic pole pieces, insulating plates and can be passed through by a shaft tube shaft hole, the coil is set in the insulating plate, the pole pieces are located on both sides of the insulating plate, the edge of the insulating plate is provided with a lead groove for the lead wire to pass through, and the insulating plate is provided with two coupling columns, and the two coupling columns have corresponding embedded slot; the circuit board is provided with an inserting part that can be embedded in the slot of the stator coil group. 12. A circuit board fixing device according to claim 11, characterized in that the insulating board is divided into several areas, and the two bonding posts are on the insulating board in different areas. 13. The circuit board fixing device according to claim 11, wherein the insertion part of the circuit board protrudes with a smaller width than the circuit board. 14. A circuit board fixing device as claimed in claim 11, wherein the insertion part of the circuit board is two corresponding sides of the circuit board. 15. A circuit board fixing device according to claim 11 or 12, characterized in that the slot and the plane of the magnetic pole piece are in the same horizontal direction. 16. A circuit board fixing device according to claim 11 or 12, characterized in that the planes of the slot and the pole piece are perpendicular to each other. 17. A circuit board fixing device as claimed in claim 11 or 12, characterized in that the coupling column and the insulating board are integrally formed. 18. A circuit board fixing device according to claim 11 or 12, characterized in that: the insertion part of the circuit board protrudes with a smaller width than the circuit board. 19. A fixing device for a circuit board, including a stator coil group, a circuit board with a Hall sensor and a control element, and a fixture, characterized in that the stator coil group is provided with a coil, a magnetic pole piece, an insulating plate, and a shaft The shaft hole through which the tube passes, the coil is arranged in the insulating plate, the magnetic pole pieces are located on both sides of the insulating plate, the edge of the insulating plate is provided with a lead groove for the lead wire to pass through; the circuit board is provided with an insertion part; the fixture is provided with The second combination column has a corresponding embedding groove, and the embedding groove is fitted with the insertion part of the circuit board, and the shaft tube fixes the stator coil group on the fixed object. 20. The circuit board fixing device according to claim 19, wherein the insertion part of the circuit board protrudes with a smaller width than the circuit board. 21. A circuit board fixing device according to claim 19, wherein the insertion part of the circuit board is two corresponding sides of the circuit board. 22. A circuit board fixing device according to claim 19, characterized in that the insertion part of the circuit board is fitted and fixed in the slot of the fixture. 23. A circuit board fixing device according to claim 19, characterized in that: the fixing object is provided with a positioning piece that blocks the power supply of the circuit board. 24. The circuit board fixing device according to claim 19, wherein the slot and the plane of the magnetic pole piece are in the same horizontal direction. 25. A circuit board fixing device according to claim 19, characterized in that the planes of the slot and the pole piece are perpendicular to each other. 26. A fixing device for a circuit board, including a stator coil group and a circuit board provided with Hall sensors and control elements, characterized in that: the stator coil group is provided with coils, magnetic pole pieces, insulating plates and can be passed through by a shaft tube shaft hole, the coil is arranged in the insulating plate, the magnetic pole pieces are located on both sides of the insulating plate, the edge of the insulating plate is provided with a lead groove for the lead wire to pass through, and the insulating plate is provided with two joint blocks, and the two joint blocks have the same orientation. slot; the circuit board is provided with an inserting part that can be embedded in the slot of the stator coil group. 27. A circuit board fixing device according to claim 26, characterized in that the insulating board is divided into several areas, and the bonding blocks are arranged in different areas. 28. A circuit board fixing device as claimed in claim 26 or 27, characterized in that the slot of the insulating plate is in the same horizontal direction as the plane of the magnetic pole piece. 29. A circuit board fixing device as claimed in claim 26 or 27, characterized in that the slot of the insulating plate is perpendicular to the plane of the magnetic pole piece. 30. A circuit board fixing device according to claim 26, characterized in that: the insertion part of the circuit board is an open slot on the same side. 31. A circuit board fixing device according to claim 26, characterized in that: the two combining blocks have both horizontal and vertical slots that are aligned with the plane direction of the magnetic pole piece. 32. A fixing device for a circuit board, including a stator coil group, a circuit board with a Hall sensor and a control element, and a fixture. The shaft hole through which the tube passes, the coil is arranged in the insulating plate, the magnetic pole pieces are located on both sides of the insulating plate, the edge of the insulating plate is provided with a lead groove for the lead wire to pass through; the circuit board is provided with an insertion part; the fixture is provided with Two combining blocks, the two combining blocks have embedding grooves with the same orientation, the embedding grooves are fitted with the embedding part of the circuit board, and the shaft tube fixes the stator coil group on the fixed object. 33. A circuit board fixing device according to claim 32, characterized in that the slot of the joint block is in the same horizontal direction as the plane direction of the fixing object. 34. A circuit board fixing device according to claim 32, characterized in that the slot of the joint block is perpendicular to the plane of the fixing object. 35. A circuit board fixing device according to claim 32, characterized in that: the insertion part of the circuit board is an open slot on the same side. 36. A circuit board fixing device as claimed in claim 32, characterized in that: the two combining blocks have both horizontal and vertical slots that are aligned with the plane direction of the magnetic pole piece. 37. A circuit board fixing device according to claim 32, characterized in that: the fixing object is provided with a positioning piece for clamping the power line of the circuit board.

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