JP4657684B2 - Stator and motor provided with the stator - Google Patents

Description

  The present invention relates to a stator and a motor including the stator.

  Generally, an electronic device such as a small hard disk drive has a built-in spindle motor to obtain a rotational driving force. Such a spindle motor is roughly composed of a stator and a rotor. In such a spindle motor stator, a thin steel plate (electromagnetic steel plate) made of a soft magnetic material is punched to form a thin stator core, and the thin stator core is laminated to form a stator core, and a conductive wire is wound around the stator core. It is the structure formed by rotating and forming a conductive coil (refer patent document 1). If a rotor is provided in this stator, a desired spindle motor can be obtained.

By the way, since the thin plate stator core is formed by punching a steel plate, a “burl” (so-called burr) is generated on one surface thereof. When a coil is formed by winding a conducting wire as described above while leaving this burr, the conducting wire may be damaged by the burr. In this case, a conductive defect due to disconnection or a short circuit occurs. Therefore, conventionally, when manufacturing such a stator, a process step called a stamping and returning process of the stator core has been performed for the purpose of removing such a burr (so-called burr). Specifically, a burr removal process for removing the burr (so-called burrs) is performed by barrel polishing or sandblasting, and then a coating process for coating the surface by painting is performed.
JP-A-8-163835

  However, when performing the above-described punching and burr (so-called burr) treatment, conventionally, two steps of burr removal treatment and subsequent surface treatment have to be carried out. It was. Therefore, in mass production of the stator, it was regarded as a problem.

  The present invention has been made in view of such circumstances and eliminates the complexity of work by reducing the number of steps required for burr (so-called burr) processing of the stator that has been performed in manufacturing the stator. An object of the present invention is to provide a stator that is suitable for mass production of stators and that prevents disconnection and short-circuiting of wiring, and a motor including the stator.

In order to solve the above-mentioned problems, the present invention provides a stator having the following means and a motor including the stator.
A stator according to the present invention includes a ring portion formed in a ring shape, and teeth that protrude inwardly or outwardly from the ring portion at an appropriate interval in the circumferential direction of the ring portion and are provided integrally with the ring portion. A stator core comprising a magnetic material provided with a portion, an FPC board provided on one surface side of the stator core, and a conductive coil provided so as to be wound around the teeth portion, wherein the one surface side is The surface side of the stator core having a burr formed at the time of shearing is set, and the width of at least the portion of the FPC board corresponding to the teeth portion of the stator core is set larger than the width of the teeth portion of the stator core, The FPC board is provided to overlap the stator core so as to cover the burr.

  In the stator according to the present invention, the width of the portion of the FPC board corresponding to the teeth portion of the stator core is set larger than the width of the teeth portion of the stator core, and the FPC board generates burr. Since the stator core is overlapped so as to cover the surface, the burr of the tooth portion of the stator core is suitably covered with the FPC board, and the wiring related to the conductive coil provided to be wound around the tooth portion is suitably protected. The As a result, burr (so-called burrs) generated when the stator core is formed does not come into contact with each part including the electric wiring. Therefore, the burr prevents the wiring relating to the conductive coil provided to be wound around the teeth portion of the stator core from being disconnected or causing an electrical short circuit.

  The stator according to the present invention is characterized in that the burr is pierced into the FPC board.

  In the stator according to the present invention, since the burr generated in the stator core is pierced into the FPC board, the wiring related to the conductive coil provided to be wound around the tooth portion is suitably protected. The As a result, burr (so-called burrs) generated when the stator core is formed does not come into contact with each part including the electric wiring. Therefore, the burr prevents the wiring relating to the conductive coil provided to be wound around the teeth portion of the stator core from being disconnected or causing an electrical short circuit.

  The stator according to the present invention is characterized in that the stator core is configured by stacking a plurality of thin stator core pieces.

  In the stator according to the present invention, since the stator core is formed so that a plurality of thin plate stator core pieces are laminated, a stator core capable of suitably forming a magnetic field can be obtained. Therefore, a suitable magnetic force capable of suitably rotating the rotor as the stator can be generated.

  In the stator according to the present invention, a stator core formed by laminating a plurality of thin plate stator core pieces is caulked from the other surface side of the stator core toward the one surface side, and the caulking clearance hole is formed in the FPC board. Is provided.

  In the stator according to the present invention, by caulking, a plurality of laminated thin plate stator core pieces can be suitably integrated into a stator core. In addition, the FPC board provided on the one surface side of the stator core can cause the protrusions formed by the caulking to preferably escape to the escape holes. Accordingly, the stator core and the FPC board can be preferably integrally formed, and the positions of the stator core and the FPC board can be suitably determined by causing the protrusions to escape into the escape holes.

  The stator according to the present invention is characterized in that a plurality of the thin plate stator core pieces are provided with positioning portions when stacked.

  In the stator according to the present invention, since a plurality of thin plate stator core pieces are provided with positioning portions when stacked, the position of the plurality of thin plate stator core pieces can be suitably determined by the positioning member. Therefore, a stator core in which a plurality of thin plate stator core pieces are preferably integrated can be obtained. Furthermore, even when an FPC board is provided on the stator core, the FPC board can be determined at a preferred position with respect to the stator core, and a preferred stator can be obtained.

  The stator according to the present invention is characterized in that a conductive wire holding portion capable of holding a conductive wire extending from a conductive coil provided so as to be wound around the tooth portion is provided on the FPC board.

  In the stator according to the present invention, since the conductor holding part is provided on the FPC board, the wired conductor is suitably held on the FPC board. As a result, the wired conductor is prevented from coming into contact with the burr (so-called burr) or the like generated in the built-in rotor or stator core. Accordingly, it is possible to obtain a preferable stator in which disconnection or electrical shorting of the conductive wire extending from the conductive coil is suitably prevented.

  The motor according to the present invention includes a ring portion formed in a ring shape, teeth that protrude inwardly or outwardly from the ring portion at an appropriate interval in the circumferential direction of the ring portion, and are integrally provided with the ring portion. The stator includes a stator core made of a magnetic material having a portion, an FPC board provided on one side of the stator core, and a conductive coil provided to be wound around the teeth part, the FPC board Is provided with a stator characterized in that the stator core is formed so as to cover at least the burr of the teeth portion, which is formed at the time of shearing.

  In the motor according to the present invention, since the FPC board is provided so as to cover the burr (so-called burr) generated when forming the stator core, the burr (burr) is in contact with each part including the electric wiring. There is nothing to do. Therefore, it is possible to obtain a motor that prevents the wiring related to the conductive coil provided so as to be wound around the teeth portion of the stator core from being disconnected or an electrical short circuit from occurring due to the burr. .

  According to the stator of the present invention, the number of steps required for the burr processing of the stator (so-called burr) that has been performed in the manufacture of the stator is reduced, the complexity of the work is eliminated, and the wiring is achieved while being suitable for mass production of the stator. It is an object of the present invention to provide a stator in which disconnection or short circuit is prevented, a method for manufacturing the stator, and a motor including the stator.

  Hereinafter, the best embodiment of the stator according to the present invention will be described with reference to FIGS. 1 is a top view and a cross-sectional view of a motor according to the present invention, FIG. 2 is a top view and a cross-sectional view of a thin stator core, and FIG. 3 is a top view and a cross-sectional view of a stator core in which the thin stator cores of FIG. 4 is a top view of the FPC board, FIG. 5 is a top view and a side view of the FPC board on which the conductor holding portion is formed, and FIG. 6 is a view of the stator main body in which the FPC board of FIG. 5 is attached to the stator core of FIG. FIG. 7 is an enlarged top view and a cross-sectional view of the teeth portion of the stator body of FIG. 6, and FIG. 8 is a top view and a cross-section showing a coil formed by winding a conductive wire around the winding portion. FIG.

(First embodiment)
A motor 1 shown in FIGS. 1A and 1B is a motor including a stator 2. This motor 1 is a so-called inner rotor type motor in which a rotor R in which a ring magnet is incorporated is provided inside a stator 2. Accordingly, a plurality of coils (conductive coils) 60 for generating a magnetic field for rotating the rotor R are provided inside the stator 2, and nine are provided in the stator 2. The configuration of the motor 1 will be described in detail later. Next, each part of the stator body 3 constituting the motor 1, that is, the stator core 10 (see FIG. 3) and the FPC board 50 (see FIG. 4) will be described.

  The stator core 10 includes four thin stator cores 11, 21, 31, 41 formed of thin steel plates, as shown in the cross-sectional view of FIG. 3 (b), which is a BB cross section of FIG. 3 (a). It is a laminated structure in which the sheets are caulked by the caulking portions 15, 25, 35, and 45 to be integrated. Note that the first thin plate stator core 11, the second thin plate stator core 21, the third thin plate stator core 31, and the fourth thin plate stator core 41 are sequentially formed from the left. Each of the first to fourth thin plate stator cores 11, 21, 31, 41 is formed in substantially the same manner. Accordingly, of the first to fourth thin plate stator cores 11, 21, 31, 41, only the first thin plate stator core 11 forming the uppermost portion of the stator core 10 is shown in FIG. The details will be described with reference to FIG. That is, as shown in FIG. 2, the first thin plate stator core 11 includes a ring portion 12 formed in a ring shape, and a teeth portion that protrudes inward from the ring portion 12 and is integrally formed with the ring portion 12. 13 and the positioning recess 14 are punched in the punching direction T and punched from the steel sheet. Therefore, “burr” (also referred to as a burr) 18 is formed at the end of the outer periphery of the first thin plate stator core 11 in the punching direction T, which is generated by punching from the steel plate. Reference numeral 16a indicates a slot portion, and reference numeral 16b indicates a yoke portion.

  On the other hand, in the first thin plate stator core 11, the end portion on the other surface side opposite to the one surface side on which the above-described “burl” 18 is formed, that is, the punching direction of the outer periphery of the first thin plate stator core 11. A “sag” 19 having a cut shape peculiar to shearing is formed at the end of the surface facing T. This “sag” is caused by being punched from a steel plate, and has a shape in which the surface is pressed down in the punching direction T. Therefore, the surface on which the sagging is formed is smaller than the surface on which the burr is formed so that the outer periphery slightly enters inward. In addition, even in the other thin plate stator cores 21, 31, 41, the above-described burr 18 (28, 38, 48) and wholly 19 (29, 39, 49) are similarly formed.

  The teeth portion 13 is a portion where a conducting wire is wound around the first thin plate stator core 11 when forming a coil 60 which will be described later, and as shown in the drawing, the teeth portion 13 is equally spaced around the inner periphery of the ring portion 12. Nine locations are formed. Specifically, the teeth portion 13 is formed in a substantially T shape inward. As a result, the coil that is wound later and formed is not removed. Further, on the outer periphery of the ring portion 12 of the first thin plate stator core 11, positioning concave portions 14 are formed at three positions at intervals of a rotation angle of 120 degrees. The positioning recess 14 is formed with an inner diameter matched to the outer diameter of a pin P described later. As a result, the positioning recess 14 is suitably fitted with the pin P. The positioning recess 14 corresponds to the positioning portion in the present invention, and the pin P corresponds to the positioning member in the present invention.

  The first to fourth thin plate stator cores 11, 21, 31, 41 formed as described above are overlapped to form the stator core 10 as follows. That is, the first to fourth thin plate stator cores 11, 21, 31, 41 are all in the punching direction T as shown in FIG. 3 (c), which is an enlarged view of the range C in FIG. 3 (b). Arranged to face the same direction. That is, the burr 28 of the second thin plate stator core 21 abuts on the sled 29 of the second thin plate stator core 21 so that the burr 28 of the second thin plate stator core 21 abuts on the slack 19 of the first thin plate stator core 11. In addition, the burr 48 of the fourth thin plate stator core 41 is disposed so as to abut the sled 39 of the third thin plate stator core 31. In addition, the first to fourth thin plate stator cores 11, 21, 31, 41 have the positioning recesses 14, 24, 34 so that the tooth portions 13, 23, 33, 43 are closely overlapped with each other. , 44 are fitted with pins P. In this way, the first to fourth thin plate stator cores 11, 21, 31, and 41 are suitably overlaid and caulked. If it does so, as shown to Fig.3 (a) and FIG.3 (b), the caulking part 15,25,35,45 will be formed.

  When the above-described caulking is performed, the burr 28 of the second thin plate stator core 21 is suitably fitted to the sag 19 of the first thin plate stator core 11, and the burr 38 of the third thin plate stator core 31 is the second thin plate stator core 21. The collar 48 is suitably fitted to the sag 29, and the barb 48 of the fourth thin plate stator core 41 is suitably fitted to the sword 39 of the third thin plate stator core 31. Accordingly, by performing the above-described caulking, each of the second to fourth thin plate stator cores 21, 31, and 41 except for the first thin plate stator core 11 that forms the uppermost portion of the stator core 10 has a burr. The first to fourth thin plate stator cores 11, 21, 31, and 41 are overlapped so as to be suitably in contact with the outer circumferences of the first to third thin plate stator cores 11, 21, and 31 that face each other. In the first to fourth thin plate stator cores 11, 21, 31, and 41, the teeth portions 13, 23, 33, and 34 are caulked, and the caulking portions 15 and 25 formed by the caulking thereof. , 35, 45, the first to fourth thin plate stator cores 11, 21, 31, 41 are preferably bonded to each other to form an integrated stator core 10. Further, the caulking portion 15 of the first thin plate stator core 11 that forms the uppermost portion of the stator core 10 protrudes to the side (left side in the figure) where the FPC board 50 described later is provided, and enters an escape hole 55 described later. It can be suitably fitted. Note that after the caulking, a coating process may be performed in which the surface of the stator core 10 is painted and coated.

  Next, the FPC board 50 provided on the stator core 10 will be described. As shown in FIG. 4, the FPC board 50 is formed in a shape substantially the same as the shape seen from the top surface of the stator core 10. That is, the FPC board 50 includes an FPC ring portion 52 formed in a ring shape, and an FPC teeth portion 53 that protrudes inward from the FPC ring portion 52 and is integrally formed with the FPC ring portion 52. Further, a plate made of a known resin such as polyimide or polyester is punched out. In addition, three FPC board positioning recesses 54 are formed at the same location as the stator core 10. The FPC board 50 may be formed by molding the above resin.

  However, unlike the stator core 10 described above, the FPC board 50 is provided with a relief hole 55 in the FPC tooth portion 53 in which the protruding caulking portion 15 can be accommodated. A rectangular portion 56 is formed on the inner periphery of the FPC ring portion 52 so as to protrude inward of the FPC ring portion 52 in each space between the FPC teeth portions 53. As shown in FIGS. 5 (a) and 5 (b), the rectangular portion 56 has an inner periphery of the FPC ring portion 52 so as to be raised in a direction opposite to the side where the stator core 10 is provided. Are bent to form a conductor holding portion 56X. The FPC board 50 has a conductive layer 59b formed on the surface of the base layer 59a made of polyimide, polyester, or the like, and a wiring portion 57 is formed. The end of the wiring portion 57 is connected to the FPC ring portion. 52 is connected to a connection terminal 58 formed integrally with the terminal 52. In addition, the wiring part 57 is comprised by four wiring. In addition, an insulating layer can be appropriately formed on the surface of the conductive layer 59b with a polyimide film or a resist as necessary.

  The FPC board 50 has a burr 18 on the portion where the conductor is wired so that the conductor is not broken or short-circuited by the burr 18 of the thin stator core 11 that forms the uppermost part of the stator core 10. It is provided so as to cover suitably. Specifically, although described in detail later as the conductive wire winding portion 4, the FPC ring portion 52 has a width of the ring portion 12 so that the inner periphery of the ring portion 12 of the stator core 10 can be covered. The width dimension of the FPC ring portion 52 is made larger than the dimension. Furthermore, even if it is in the width dimension of the said FPC teeth part 53, it is made large compared with the width dimension of the teeth part 13 of the said stator core 10. FIG. Further, as will be described later with reference to FIG. 7, the radial length of the FPC tooth portion 53 is shorter than the radial length of the tooth portion 13 of the stator core 10. That is, the FPC teeth portion 53 is formed as if the FPC teeth portion 13 is shifted toward the FPC ring portion 52 so that the rotor R can rotate without being caught.

  The FPC board 50 formed as described above is attached to the stator core 10 as follows. That is, the FPC board 50 is attached to the stator core 10 such that a caulking portion 15 formed in a protruding shape on the thin plate stator core 11 that forms the uppermost portion of the stator core 10 is fitted into the escape hole 55 of the FPC. Further, even in the FPC board 50, the stator core 10 and the FPC board so that the positioning recess 14 of the stator core 10 and the positioning recess 54 of the FPC board 50 are fitted by the pin P. 50 is positioned. Even if the FPC board 50 is bonded to one surface of the first thin plate stator core 11, the first to fourth thin plate stator cores 11, 21, 31, and 41 are caulked. Good.

  The FPC board 50 is attached to the stator core 10 such that a burr 18 formed on the stator core 10 pierces the back surface of the FPC board 50. Specifically, a resin adhesive is applied to the back surface of the FPC board 50 and bonded to the surface on which the burr 18 of the stator core 10 is formed in the state positioned as described above. In this way, the stator body 3 in which the stator core 10 and the FPC board 50 are integrated is formed as shown in FIGS. 6 (a) and 6 (b).

  The stator main body 3 shown in FIG. 6 (a) and FIG. 6 (b) taken along the line DD in FIG. 6 (a) is obtained by attaching the FPC board 50 to the stator core 10 as described above. The burr 18 formed on the stator core 10 is covered with the FPC board 50. At this time, as shown in the figure, the tooth portion 13 of the stator core 10 and the FPC tooth portion 53 of the FPC board 50 together constitute the conductive wire winding portion 4. Next, the conductive wire winding part 4 will be described.

  That is, as described above, the conductive wire winding part 4 is formed such that the width dimension of the FPC tooth part 53 is larger than the width dimension of the tooth part 13 of the stator core 10, and The radial length of the FPC teeth 53 is formed to be shorter than the radial length of the teeth 13. Therefore, as shown in FIG. 7 (a), which is an enlarged view of the range E of FIG. 6 (a), the conductive wire winding part 4 is a portion 4a of the conductive wire winding part 4 where the conductive wire is wound. The FPC teeth portion 53 is configured to suitably cover the teeth portion 13. Further, the FPC teeth portion 53 is configured so as to suitably cover the teeth portion 13 with respect to the portion 4b related to the distal end side of the FPC teeth portion 53 of the conductive wire winding portion 4. Furthermore, the inner periphery 52a of the FPC ring portion 52 is also configured to suitably cover the inner periphery 12a of the ring portion 12 of the stator core 10. On the other hand, in the tooth portion 13 on the rotor R side portion 13a, the tooth portion 13 of the stator core 10 slightly extends from the tip of the FPC tooth portion 53 so that the rotor R rotates without being caught. It is configured to be issued. Reference numeral 57 a denotes a connection end portion of the wiring portion 57.

  With this configuration, the burr 18 formed on the stator core 10 is formed on the FPC board 50 as shown in FIG. 7B, which is the FF cross section of FIG. Embedded in the back of the. Accordingly, the burr 18 formed on the stator core 10 is configured so as not to go outside. That is, the conductive wire winding portion 4 is configured such that the burr 18 formed on the stator core 10 does not appear. Further, when the rotor R rotates, the rotor R can be rotated without being caught by the FPC teeth portion 53.

  As shown in FIGS. 8A and 8B, the conductive wire winding portion 4 configured as described above is wound with a conductive wire, and nine coils 60 are formed. This coil 60 forms a magnetic field for rotating the rotor R provided inward, and is connected every two. That is, as shown in FIG. 1, three coils 60U, three coils 60V, and three coils 60W are connected to form a three-phase star connection. Each of the three sets of connecting end portions is connected to the connecting end portion 57 a of the wiring portion 57. Reference numeral 56X denotes the above-described conductive wire holding part.

  The stator 2 is configured as described above. As shown in FIGS. 1 (a) and 1 (b), the stator 2 is attached to a base plate F via a pin P serving as a positioning member, and the rotor R is disposed therein. . The rotor R is supported by a bearing B by a hub H.

  Thus, by manufacturing the stator 2 and the motor 1, the burr 18 formed on the stator core 10 does not come into contact with each part including electric wiring. Accordingly, the burr 18 prevents the wiring from being disconnected or causing a short circuit. As a result, it is possible to obtain a stator and a motor in which the burr is prevented from damaging the electric wiring or the like without performing the burr removing process that has been conventionally required.

  Next, a modified example of the above-described stator 2 will be described. That is, in the second embodiment, a modification of the thin plate stator core 11, in the third embodiment, a modification of the FPC board 50, and in the fourth embodiment, an outer rotor type. An example in which the present invention is used for a motor will be illustrated and described. In addition, about the part comprised similarly to 1st Embodiment mentioned above, the same code | symbol is attached | subjected and the description is abbreviate | omitted. 9 is a top view showing a thin plate stator core according to another embodiment, FIG. 10 is a top view showing an FPC board according to another embodiment, and an enlarged view of a conductor holding portion, and FIG. 11 is a top view of an outer rotor type stator core. FIG. 12 is a top view of the stator main body in which the FPC board is attached to the stator core of FIG.

(Second Embodiment)
A thin plate stator core 11A shown in FIG. 9 is a modification of the thin plate stator core 11 constituting the stator 2 of the first embodiment, and is a positioning recess formed in the thin plate stator core 11 of the first embodiment. (Positioning part) 14 is deformed into a convex part 14A for positioning formed in a convex shape. Although not shown, when the positioning portion is configured by the positioning convex portion 14A, the positioning member is preferably replaced with the positioning convex portion 14A instead of the pin P used in the first embodiment. A concave positioning member formed into a concave shape that can be fitted is used. Even in the case where the positioning convex portion 14A as the positioning portion is configured as described above, this thin plate can be obtained by fitting the positioning convex portion 14A to the concave positioning member as in the first embodiment. The stator core 11A can be suitably positioned.

(Third embodiment)
An FPC board 50A shown in FIG. 10A is a modification of the FPC board 50 constituting the stator 2 of the first embodiment, and is a rectangle formed on the FPC board 50 of the first embodiment. The portion 56 is deformed into a cut portion 56A. As shown in FIG. 10 (b), which is an enlarged view of the range G of FIG. 10 (a), the cut portion 56A has the upper surface of the FPC ring portion 52 extending from the outer periphery to the inner periphery of the FPC ring portion 52. It is provided by cutting appropriately. The cut portion 56A is bent along the fold line 56a so as to be raised in a direction opposite to the side where the stator core 10 is provided, thereby forming a conductor holding portion. Even in the case where the conducting wire holding part is configured in this way, the conducting wire to be arranged is suitably held by this conducting wire holding part, as in the first embodiment.

(Fourth embodiment)
The stator described in the first to third embodiments described above is a so-called inner rotor type stator in which the rotor R is provided inside the stator 2. The stator described below is a so-called outer rotor type stator in which a rotor is provided outside the stator.

  That is, in the inner rotor type stator core 10 in the first to third embodiments described above, the tooth portion 13 is formed inward of the ring portion 12. As shown in FIG. 11A, the stator core 10B is configured such that a tooth portion 13B is formed outward of the ring portion 12B. Furthermore, in the stator core 10 in the first to third embodiments described above, a positioning recess (positioning portion) 14 that can be fitted to the pin P (positioning member) is formed on the outer periphery of the ring portion 12. Although configured as described above, the next stator core 10B is configured such that a positioning concave portion (positioning portion) 14B is formed on the inner periphery of the ring portion 12B.

  Even in the next FPC board 50B, it is formed in conformity with the stator core 10B. That is, in the FPC board 50B shown in FIG. 11B, an FPC teeth portion 53B is formed outward of the FPC ring portion 52B, and a positioning recess (positioning portion) is formed on the inner periphery of the FPC ring portion 52B. 54B is formed. Further, even in the connection terminal 58B, unlike the first to third embodiments provided outside the FPC ring portion 52, the connection terminal 58B is provided inside the FPC ring portion 52B. Yes.

  As shown in FIG. 12A, the stator core 10B and the FPC board 50B formed as described above are configured such that the positioning recess 14B of the stator core 10B and the positioning recess 54B of the FPC board 50B are formed by pins P, respectively. The stator core 10 </ b> B and the FPC board 50 </ b> B are positioned so as to be fitted together to form a stator main body 3 </ b> B.

  The conductor winding portion 4B of the stator body 3B will be described with reference to FIG. 12B, which is an enlarged view of the range H in FIG. That is, like the conductor winding portion 4 in the first to third embodiments described above, the width dimension of the FPC tooth portion 53B is longer than the width dimension of the tooth portion 13B of the stator core 10B. In addition, the radial length of the FPC tooth portion 53B is shorter than the radial length of the tooth portion 13B of the stator core 10B. That is, the FPC teeth portion 53B is formed as if the FPC teeth portion 53B is shifted to the ring portion 12B side so that an outer rotor (not shown) can rotate without being caught. In addition, the FPC ring portion 52B is formed longer than the width of the ring portion 12B so as to cover the outer periphery of the ring portion 12B of the stator core 10B.

  By configuring the conductive wire winding portion 4B in this way, the FPC board 50 can be connected to the portion where the conductive wire is wired so that the conductive wire is not disconnected or short-circuited by the burr 18 of the stator core 10B. A burr 18 is suitably covered. Accordingly, the burr 18 formed on the stator core 10B does not come into contact with each part including the electric wiring, and the burr 18 may cause the wiring to be disconnected or cause a short circuit. Is prevented. That is, it is possible to obtain a stator and a motor in which the burr is prevented from damaging the electric wiring or the like without performing the burr removing process that has been conventionally required.

In addition, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, an appropriate selection is possible.
For example, the conductor holding portion of the stator in the above-described embodiment is configured by bending a part of the FPC board integrated with the FPC ring portion. However, the present invention is not limited to this, and an appropriate separate member is used as the FPC. You may form a conducting wire holding part by attaching to a ring part etc. Moreover, when forming a conducting wire holding part, you may comprise so that a suitable metal plate may be affixed on the said rectangular part 56 or the notch | incision part 56 in order to hold | maintain the shape of the conducting wire holding part.

It is the top view and cross-sectional view of the motor which concern on this invention. It is the top view and cross-sectional view of a thin plate stator core. FIG. 3 is a top view and a cross-sectional view of a stator core in which the thin plate stator cores of FIG. 2 are laminated. It is a top view of an FPC board. It is the upper side figure and side view of an FPC board in which the conducting wire holding part was formed. FIG. 6 is a top view and a cross-sectional view of a stator body in which the FPC board of FIG. 5 is attached to the stator core of FIG. 3. FIG. 7 is an enlarged top view and a transverse cross-sectional view of a teeth portion of the stator body of FIG. 6. It is the top view and cross-sectional view which show the coil formed by winding conducting wire in the coil | winding part. It is a top view which shows the stator core of another embodiment. It is the top view which shows the FPC board of another embodiment, and the enlarged view of a conducting wire holding | maintenance part. FIG. 4 is a top view of an outer rotor type stator core and a top view of an FPC board. FIG. 12 is a top view of a stator body in which an FPC board is attached to the stator core of FIG. 11.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motor 2 Stator 3 Stator main body 10 Stator core 50 FPC board 53 Teeth part

Claims (5)

It is made of a magnetic material including a ring portion formed in a ring shape, and a tooth portion that protrudes inward or outward from the ring portion at an appropriate interval in the circumferential direction of the ring portion and is provided integrally with the ring portion. A stator core;
An FPC board provided on one side of the stator core;
A stator provided with a conductive coil provided to be wound around the teeth portion,
The stator core is formed by stacking a plurality of thin stator core pieces formed by shearing so that the punching directions are in the same direction, and the one surface side is a surface side having a burr formed at the time of shearing the stator core. The width of at least the portion of the FPC board corresponding to the teeth part of the stator core is set larger than the width of the teeth part of the stator core, and the FPC board is provided so as to overlap the burr so as to cover the burr It is,
The FPC board includes a conductor holding portion that is capable of holding a conductor extending from the conductor coil and is bent in a direction opposite to the side on which the stator core is provided .   The stator according to claim 1, wherein the burr is configured to pierce the FPC board. A stator core configured by laminating a plurality of thin plate stator core pieces is caulked from the other surface side of the stator core toward the one surface side,
The stator according to claim 2, wherein the FPC board is provided with a caulking relief hole.   The stator according to claim 2 or 3, wherein a plurality of the thin plate stator core pieces are provided with positioning portions when stacked. A motor comprising the stator according to any one of claims 1 to 4 .

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