JP2017184330A - Coil component, morter, and manufacturing method for coil component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil component capable of simplifying winding work of a coil onto a bobbin, while preventing a coil from breakage when a terminal pin moves in a direction of pulling-out from the bobbin.SOLUTION: A coil component 36 comprises: a bobbin 25 having a cylindrical part to which a coil 23 is wound; and two terminal pins 26 held by a flange part 30c of the bobbin 25 so as to protrude from the flange part 30c in a Z2 direction. The Z2 direction side face of the flange part 30c includes two projection parts 30e, 30f, tips of which lean toward the two terminal pins 26 respectively. End parts of the coil 23, which are wound and fixed on tip side portions of the terminal pins 26, are fixed parts 23a, 23d. A part of the coil 23, which is wound on the cylindrical part, is a wound part 23b. In between the fixed parts 23a, 23d and the wound part 23b of the coil 23, loose parts 23c, 23e are formed, which are wound in a loose state on base end parts of the terminal pins 26 and on the projection parts 30e, 30f.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a coil component including a coil, a bobbin, and a terminal pin. Moreover, this invention relates to a motor provided with this coil component. Furthermore, the present invention relates to a method for manufacturing such a coil component.

  Conventionally, a coil component including a coil, a bobbin, and two terminal pins is known (see, for example, Patent Document 1). In the coil component described in Patent Document 1, the bobbin is integrally formed with a cylindrical body part around which the coil is wound, a pair of flange parts formed at both axial ends of the cylindrical body part, and one of the flange parts. And a terminal support portion to be formed. The terminal support surface formed in the terminal support part is formed with a terminal hole for fixing the terminal pin. A shoulder portion, which is a substantially right-angled corner, is formed at the longitudinal end of the terminal support surface.

  In the coil component described in Patent Document 1, after one end of the coil is entangled with one terminal pin, the coil is routed so that the coil is hooked on one shoulder of the terminal support, and then the cylindrical body is Wind the coil. Further, when the coil is wound around the cylindrical body portion, the coil is routed so that the coil is hooked on the other shoulder portion of the terminal support portion, and then the other end portion of the coil is wound around the other terminal pin. Moreover, in this coil component, after that, the part which hung on the shoulder part of the coil is removed from the coil. When a part of the coil hanging on the shoulder is detached from the shoulder, sagging occurs in the portion of the coil close to the terminal pin.

  Therefore, in the coil component described in Patent Document 1, in the subsequent process, even if the force in the direction in which the terminal pin is pulled out from the bobbin acts on the terminal pin, and the terminal pin moves in the direction in which it is pulled out from the bobbin, the coil component is excessive. It becomes possible to suppress the application of tensile stress, and as a result, it is possible to suppress the disconnection of the coil.

Japanese Patent Laying-Open No. 2015-192466

  As described above, in the coil component described in Patent Document 1, the coil is wound around the shoulder of the terminal support portion so that the coil is wound around the bobbin, and then a part of the coil that is hooked on the shoulder portion. Is removed from the shoulder, so that a sag is generated in the portion of the coil close to the terminal pin. Moreover, in this coil component, since the sagging has arisen in the part near a terminal pin of a coil, even if a terminal pin moves to the direction which pulls out from a bobbin, it is possible to suppress disconnection of a coil. However, the operation of drawing the coil so that the coil having a small wire diameter does not come off from the shoulder and the operation of removing the coil having a small wire diameter hung on the shoulder from the shoulder are complicated. In particular, the operation of removing the coil that has been hung on the shoulder is a manual operation, and thus becomes more complicated. Therefore, in the case of the coil component described in Patent Document 1, the coil winding operation around the bobbin becomes complicated.

  Therefore, an object of the present invention is to provide a coil component including a coil, a bobbin, and a terminal pin, even if it is possible to suppress the disconnection of the coil when the terminal pin moves in the direction of coming out of the bobbin. An object of the present invention is to provide a coil component capable of simplifying the winding operation. Moreover, the subject of this invention is providing the motor provided with this coil component, and the manufacturing method of this coil component.

  In order to solve the above-described problems, a coil component of the present invention includes a coil, a bobbin having a cylindrical tube part around which the coil is wound, and two terminal pins held by the bobbin. It has a collar part formed so as to spread from one end of the cylinder part in a direction perpendicular to the axial direction of the cylinder part, and the two terminal pins are held by the collar part so as to protrude from the collar part, Assuming that the protruding direction of the terminal pin is the first direction, two protrusions are formed on the surface on the first direction side of the flange portion so that the tip is inclined toward each of the two terminal pins. Is a fixed portion that is wound and fixed around the tip side portion of the terminal pin. If the portion of the coil that is wound around the cylindrical portion is a winding portion, the fixed portion and the winding portion of the coil A slack portion wound in a slack state is formed between the base end side portion of the terminal pin and the protrusion. And wherein the Rukoto.

  In the coil component of the present invention, between the fixed portion wound around the tip side portion of the terminal pin of the coil and fixed and the winding portion wound around the tube portion, A slack portion wound in a slack with the protrusion is formed. Therefore, in this invention, it becomes possible to suppress the disconnection of a coil when a terminal pin moves to the direction which pulls out from a bobbin.

  Moreover, in this invention, the part wound around the protrusion of the coil which falls toward the terminal pin, and the base end side part of a terminal pin is a slack part. For this reason, in the present invention, for example, an upright projection that is arranged in parallel with the terminal pin is formed on the flange portion of the bobbin before the coil is wound, and at the time of winding the coil around the bobbin, A slack portion can be formed in the coil by winding a part of the coil around the protrusion and the base end side portion of the terminal pin, and finally tilting the protrusion in the upright state. Therefore, in the present invention, the coil is routed so that the coil having a small wire diameter does not come off from the shoulder portion, and finally, the slack portion is formed by removing the coil having the small wire diameter hanging from the shoulder portion from the shoulder portion. As compared with the conventional coil parts, the winding operation of the coil around the bobbin can be simplified.

  In the present invention, the two terminal pins are held in the collar portion in a lined state, and when the direction in which the two terminal pins are lined is a second direction, one of the two protrusions is The terminal pin arranged on one side in the second direction is arranged on one side in the second direction, and the other protrusion is on the other side in the second direction of the terminal pin arranged on the other side in the second direction. It is preferable that they are arranged. With this configuration, one of the two protrusions is disposed on the other side in the second direction of the terminal pin disposed on the one side in the second direction, and the other protrusion is the other in the second direction. Compared to the case where the terminal pin arranged on the side is arranged on one side in the second direction, when the coil is wound around the bobbin, the protrusion in the upright state and the proximal side portion of the terminal pin It becomes easier to wind a part of the coil.

  The coil component of the present invention includes a stator formed in a cylindrical shape having the coil component, a rotor having a driving magnet and disposed on the inner peripheral side of the stator, at least the outer peripheral surface of the rotor and the inner periphery of the stator. A partition member having a substantially bottomed cylindrical partition wall disposed between the surface, a circuit board fixed to the partition wall outside the partition wall in the axial direction of the rotor, and a resin resin seal covering the stator and the circuit board The terminal pin protrudes toward the circuit board, and the tip side of the terminal pin can be used for a motor that is soldered and fixed to the circuit board. In this motor, even if it is possible to suppress the disconnection of the coil when the terminal pin moves in the direction of coming out of the bobbin, it is possible to simplify the winding operation of the coil around the bobbin.

  In the coil component of the present invention, for example, when one of two terminal pins is a first terminal pin and the other terminal pin is a second terminal pin, the first terminal pin and the second terminal pin are press-fitted into the collar portion. A terminal pin fixing step for fixing, a terminal coil fixing step after the terminal pin fixing step, a first coil end processing step for winding one end of the coil around the tip side portion of the first terminal pin, and a first coil end processing step, The first protrusion formed on the first direction side surface of the collar portion and spaced from the first terminal pin so as to rise from the first direction side surface of the portion toward the first direction side And a second coil end processing step of winding a portion of the coil around the proximal end portion of the first terminal pin, and a coil winding step of winding a portion of the coil around the cylindrical portion after the second coil end processing step, After the coil winding step, from the first direction side surface of the flange part to the first direction side A part of the coil is formed between the second protrusion formed on the surface of the flange in the first direction so as to stand up and arranged with a space between the second terminal pin and the proximal side portion of the second terminal pin. A third coil end treatment step, a fourth coil end treatment step after the third coil end treatment step, and a fourth coil end treatment step in which the other end of the coil is wound around the tip end portion of the second terminal pin. After the processing step, the first protrusion is deformed so that the first protrusion falls toward the first terminal pin to form the protrusion, and the second protrusion is deformed so that the second protrusion falls toward the second terminal pin. And a projection forming step of forming a projection to produce a coil component.

  In this manufacturing method, in the second coil end processing step, the first protrusion and the first protrusion which are formed so as to rise on the surface in the first direction of the collar and are spaced from the first terminal pin. A part of the coil is wound around the base end side portion of the one terminal pin, and in the third coil end portion processing step, it is formed so as to rise on the surface in the first direction side of the flange portion and is spaced from the second terminal pin. A portion of the coil is wound around the second protrusion and the base end side portion of the second terminal pin that are disposed in a state where the first protrusion protrudes toward the first terminal pin in the protrusion forming step. It is possible to form a slack portion in the coil by deforming the second protrusion and deforming the second protrusion so that the second protrusion falls toward the second terminal pin. Therefore, the conventional coil that draws the coil so that the coil with a small wire diameter does not come off from the shoulder portion, and finally forms the slack portion by removing the coil with the small wire diameter that has hung on the shoulder portion from the shoulder portion. Compared with the winding operation of the coil, the winding operation of the coil around the bobbin can be simplified.

  In the present invention, the bobbin is preferably made of resin, and in the protrusion forming step, it is preferable that hot air is applied to the first protrusion and the second protrusion to deform the first protrusion and the second protrusion. If comprised in this way, a 1st protrusion and a 2nd protrusion will be changed even if a jig | tool for deforming a 1st protrusion and a 2nd protrusion is not made to contact a 1st protrusion and a 2nd protrusion in a protrusion formation process. It becomes possible to make it. Accordingly, it is possible to suppress disconnection of the coil due to the jig or the like coming into contact with the coil in the protrusion forming step.

  In the manufacturing method of the present invention, for example, after the fourth coil end portion processing step and before the protrusion forming step, one end portion of the coil is soldered and fixed to the tip side portion of the first terminal pin. In addition, a solder fixing step of soldering and fixing the other end of the coil to the tip side portion of the second terminal pin is provided.

  In the present invention, it is preferable that a notch is formed on the first terminal pin side of the root portion of the first protrusion and on the second terminal pin side of the root portion of the second protrusion. If comprised in this way, it will become easy to deform | transform a 1st protrusion so that a 1st protrusion may fall toward a 1st terminal pin in a protrusion formation process, and a 2nd protrusion may fall toward a 2nd terminal pin. It becomes easy to deform the second protrusion.

  As described above, in the present invention, it is possible to simplify the coil winding work around the bobbin even if it is possible to suppress the disconnection of the coil when the terminal pin moves in the direction of coming out of the bobbin. become.

It is sectional drawing of the pump apparatus with which the motor concerning embodiment of this invention is integrated. It is a top view of the stator core shown in FIG. FIG. 2 is a perspective view of the bobbin and terminal pin shown in FIG. 1 in a state before a coil is wound. It is a figure for demonstrating the structure of the lower end side part of the coil components shown in FIG. It is a figure for demonstrating the manufacturing method of the motor shown in FIG. FIG. 3 is a plan view of a core body that is a stator core shown in FIG. 2. It is a figure for demonstrating the structure of the lower end side part of the bobbin concerning other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Schematic configuration of the pump device)
FIG. 1 is a cross-sectional view of a pump device 1 in which a motor 3 according to an embodiment of the present invention is incorporated. In the following description, the upper side (Z1 direction side) in FIG. 1 is the “upper” side, and the lower side (Z2 direction side) in FIG. 1 is the “lower” side.

  The motor 3 of this embodiment is incorporated and used in a pump device 1 of a type called a canned pump (canned motor pump). The pump device 1 includes an impeller 2 that is rotated by the power of a motor 3. The motor 3 includes a rotor 5, a stator 6, and a circuit board 4 for controlling the motor 3. The impeller 2, the rotor 5, the stator 6, and the circuit board 4 are disposed inside a case body that includes a housing 7 that forms a part of the motor 3 and an upper case 8 that covers an upper portion of the housing 7. . The housing 7 and the upper case 8 are fixed to each other by screws not shown.

  The upper case 8 is formed with a fluid suction portion 8a and a fluid discharge portion 8b. A pump chamber 9 is formed between the housing 7 and the upper case 8 through which the fluid sucked from the suction portion 8a passes toward the discharge portion 8b. In addition, a seal member (O-ring) 10 for securing the hermeticity of the pump chamber 9 is disposed at a joint portion between the housing 7 and the upper case 8. The housing 7 includes a partition member 11 having a partition 11 a disposed between the pump chamber 9 and the stator 6 so as to separate the pump chamber 9 and the stator 6, and a resin resin that covers a lower surface and side surfaces of the partition member 11. And a sealing member 12.

  The rotor 5 includes a drive magnet 14, a cylindrical sleeve 15, and a holding member 16 that holds the drive magnet 14 and the sleeve 15. The holding member 16 is formed in a substantially cylindrical shape with a hook. The drive magnet 14 is fixed to the outer peripheral side of the holding member 16, and the sleeve 15 is fixed to the inner peripheral side of the holding member 16. The impeller 2 is fixed to the flange portion 16a of the holding member 16 disposed on the upper side. The impeller 2 and the rotor 5 are disposed inside the pump chamber 9.

  The rotor 5 is rotatably supported on the fixed shaft 17. The fixed shaft 17 is disposed so that the axial direction of the fixed shaft 17 coincides with the vertical direction. That is, the vertical direction is the axial direction of the rotor 5. The upper end of the fixed shaft 17 is held by the upper case 8, and the lower end of the fixed shaft 17 is held by the housing 7. The fixed shaft 17 is inserted through the inner peripheral side of the sleeve 15. A thrust bearing member 18 that is in contact with the upper end surface of the sleeve 15 is attached to the fixed shaft 17. In this embodiment, the sleeve 15 functions as a radial bearing for the rotor 5, and the sleeve 15 and the thrust bearing member 18 function as a thrust bearing for the rotor 5.

  The stator 6 includes a driving coil 23, a stator core 24, and a bobbin 25, and is formed in a cylindrical shape as a whole. Specifically, the stator 6 is formed in a substantially cylindrical shape. The stator 6 is disposed on the outer peripheral side of the rotor 5 via the partition wall 11a. That is, the rotor 5 is disposed on the inner peripheral side of the stator 6, and the partition wall 11 a is disposed between the outer peripheral surface of the rotor 5 and the inner peripheral surface of the stator 6. The stator 6 is arranged so that the axial direction of the stator 6 coincides with the vertical direction.

  In addition, the stator 6 includes a plurality of terminal pins 26 that are electrically connected with the ends of the coils 23 being tangled. The terminal pin 26 is disposed so that the longitudinal direction of the terminal pin 26 coincides with the vertical direction. That is, the terminal pin 26 is disposed in parallel with the up-down direction. A specific configuration of the stator 6 will be described later. In the following description, the radial direction of the rotor 5 and the stator 6 is referred to as “radial direction”, and the circumferential direction (circumferential direction) of the rotor 5 and the stator 6 is referred to as “circumferential direction”.

  As described above, the partition wall member 11 includes the partition wall 11a. The partition wall 11a is formed in a substantially bottomed cylindrical shape with a flange, and includes a cylindrical portion 11b, a bottom portion 11c, and a flange portion 11d. The cylindrical portion 11 b is formed in a cylindrical shape and is disposed so as to cover the outer peripheral surface of the driving magnet 14. The bottom part 11c is formed in a disk shape that closes the lower end of the cylindrical part 11b. The flange portion 11d is formed so as to spread outward from the upper end of the cylindrical portion 11b in the radial direction.

  A shaft holding portion 11h that holds the lower end side of the fixed shaft 17 is formed on the upper surface of the bottom portion 11c so as to protrude upward. A fixing projection 11j for fixing the circuit board 4 to the partition wall member 11 is formed on the lower surface of the bottom portion 11c so as to protrude downward. The fixing protrusion 11j is formed at the center of the bottom surface of the bottom portion 11c. A positioning projection 11k for positioning the circuit board 4 is formed on the bottom surface of the bottom portion 11c so as to protrude downward. As shown in FIG. 1, the inner side and the upper side of the partition wall 11a serve as the pump chamber 9, and the impeller 2 and the rotor 5 are disposed on the inner side and the upper side of the partition wall 11a. The partition wall 11 a functions to prevent the fluid in the pump chamber 9 from flowing into the locations where the stator 6 and the circuit board 4 are disposed.

  The circuit board 4 is a rigid board such as a glass epoxy board, and is formed in a flat plate shape. The circuit board 4 is disposed below the coil 23, the stator core 24, and the bobbin 25 so that the thickness direction of the circuit board 4 coincides with the vertical direction. The circuit board 4 is fixed by a screw 34 that is screwed into the fixing protrusion 11j while being positioned in the radial direction by the fixing protrusion 11j and the positioning protrusion 11k. That is, the circuit board 4 is fixed to the bottom part 11 c below the bottom part 11 c (that is, outside the partition wall 11 a in the vertical direction), and the circuit board 4 is arranged outside the pump chamber 9. The lower end side of the terminal pin 26 is fixed to the circuit board 4 by soldering.

  The resin sealing member 12 is provided to completely cover the circuit board 4 and the coil 23 and the like, and to protect the circuit board 4 and the coil 23 and the like from the fluid. The resin sealing member 12 is formed in a substantially bottomed cylindrical shape as a whole, and completely covers the circuit board 4, the stator 6, the cylindrical portion 11b, and the bottom portion 11c. Moreover, the resin sealing member 12 covers the lower surface of the flange portion 11d.

(Structure of stator)
FIG. 2 is a plan view of the stator core 24 shown in FIG. FIG. 3 is a perspective view of the bobbin 25 and the terminal pin 26 shown in FIG. 1 in a state before the coil 23 is wound. FIG. 4 is a view for explaining the configuration of the lower end portion of the coil component 36 shown in FIG.

  As described above, the stator 6 includes the coil 23, the stator core 24, the bobbin 25, and the terminal pins 26. The stator core 24 is a laminated core formed by laminating thin magnetic plates made of a magnetic material. As shown in FIG. 2, the stator core 24 includes an outer peripheral ring portion 24a formed in an annular shape, and a plurality of salient pole portions 24b protruding from the outer peripheral ring portion 24a toward the inside in the radial direction. The stator core 24 of this embodiment includes six salient pole portions 24b. The six salient pole portions 24b are arranged at regular intervals in the circumferential direction. Note that the number of salient pole portions 24b included in the stator core 24 may be other than six.

  The outer peripheral ring portion 24a is formed in an annular shape in which the shape of the outer peripheral surface when viewed from the vertical direction is substantially circular, and the shape of the inner peripheral surface when viewed from the vertical direction is substantially hexagonal. The outer peripheral surface of the outer peripheral ring portion 24 a constitutes the outer peripheral surface of the stator core 24. Moreover, the outer periphery ring part 24a is comprised by the six outer periphery parts 24e. A salient pole portion 24b is formed on each of the six outer peripheral portions 24e. A salient pole portion 24b is formed at the center of the outer peripheral portion 24e in the circumferential direction.

  The salient pole portion 24b includes a salient pole tip portion 24c that is a tip portion of the salient pole portion 24b, and a connecting portion 24d that connects the salient pole tip portion 24c and the outer peripheral ring portion 24a. The salient pole tip 24c is formed in a substantially arc shape extending from the tip (radially inner end) of the connecting portion 24d formed in a straight line toward both sides in the circumferential direction when viewed from the vertical direction. The inner side surface of the salient pole tip portion 24c in the radial direction is opposed to the outer peripheral surface of the driving magnet 14 via the cylindrical portion 11b.

  The stator core 24 is formed by bending six outer peripheral portions 24e (see FIG. 6) connected in a straight line at a boundary portion between the outer peripheral portion 24e and the outer peripheral portion 24e and connecting the end portions thereof. Curling core. That is, the stator core 24 is formed in an annular shape by connecting the end portions of the core composed of the belt-shaped core that forms the outer peripheral ring portion 24a and the six salient pole portions 24b that rise from one surface of the belt-shaped core. Has been. Therefore, as shown in FIG. 2, a joint 24f is formed at one place between the outer peripheral portions 24e in the circumferential direction.

  The bobbin 25 is made of an insulating material. Specifically, the bobbin 25 is made of an insulating resin. The bobbin 25 is attached to each salient pole portion 24b, and the stator 6 includes six bobbins 25. The bobbin 25 is formed in a cylindrical shape with hooks having flange portions at both ends, and is attached to the salient pole portion 24b so that the axial direction of the bobbin 25 formed in the cylindrical shape matches the radial direction of the stator 6. It has been. The bobbin 25 is configured by a first bobbin 30 and a second bobbin 31 that can be divided in the vertical direction, and the bobbin 25 is formed by combining the first bobbin 30 and the second bobbin 31. The first bobbin 30 is disposed on the lower side, and the second bobbin 31 is disposed on the upper side.

  The first bobbin 30 has a rectangular groove-shaped lower half-cylinder portion 30a covering the side surface of the lower end side portion of the connecting portion 24d and the lower surface of the connecting portion 24d, and an inner side connected to the radially inner end of the lower half-cylindrical portion 30a. It is comprised from the collar part 30b and the outer side collar part 30c connected to the radial direction outer end of the lower half cylinder part 30a. The second bobbin 31 has a rectangular groove-shaped upper half cylinder part 31a that covers the side surface of the upper end side part of the connection part 24d and the upper surface of the connection part 24d, and an inner flange part that is connected to the radially inner end of the upper half cylinder part 31a. It is comprised from 31b and the outer side collar part 31c connected to the outer side end of the radial direction of the upper half cylinder part 31a. In this embodiment, the upper half cylinder part 31a and the lower half cylinder part 30a form a cylinder part 25a around which the coil 23 is wound.

  The inner flange portion 31b is formed in a flange shape extending from the inner end of the upper half cylinder portion 31a in the radial direction to both sides and the upper side in the circumferential direction, and covers the outer peripheral side of the upper end side portion of the salient pole tip portion 24c. . The outer flange portion 31c is formed in a hook shape extending from the outer end of the upper half cylinder portion 31a in the radial direction to both sides and the upper side in the circumferential direction, and a part of the upper end surface of the outer peripheral portion 24e and a part of the outer peripheral portion 24e. It covers the inner peripheral side of the upper end side part.

  The inner flange portion 30b is formed in a hook shape extending from the inner end of the lower semi-cylindrical portion 30a in the radial direction to both sides and the lower side in the circumferential direction, and the lower end surface of the salient pole tip portion 24c and the salient pole tip portion 24c. It covers the outer peripheral side of the lower end side portion. The outer flange portion 30c is formed in a hook shape extending from the outer end of the lower half cylinder portion 30a in the radial direction to both sides and the lower side in the circumferential direction, and a part of the lower end surface of the outer peripheral portion 24e and the outer peripheral portion 24e The inner peripheral side of some lower end portions is covered. The outer collar part 30c of this embodiment is a collar part formed so as to spread from one end of the cylinder part 25a in a direction orthogonal to the axial direction of the cylinder part 25a.

  Two terminal pins 26 are press-fitted and fixed to the outer flange 30c with a space in the circumferential direction. That is, the two terminal pins 26 are held by the outer flange 30c in a state where they are aligned. Further, the two terminal pins 26 are fixed to the outer flange 30c so as to protrude downward from the outer flange 30c. That is, the two terminal pins 26 are fixed to the outer flange portion 30c so as to protrude in a direction orthogonal to the axial direction of the cylindrical portion 25a of the bobbin 25. Specifically, the terminal pin 26 is fixed to the outer flange 30c so that the lower end portion of the terminal pin 26 protrudes below the lower end surface 30d of the outer flange 30c. Projecting toward the substrate 4. The downward direction (Z2 direction) in this embodiment is a first direction that is a protruding direction of the terminal pin 26 from the outer flange portion 30c.

  As described above, the lower end side of the terminal pin 26 (that is, the front end side of the terminal pin 26) is soldered and fixed to the circuit board 4. In the following description, the direction in which the two terminal pins 26 are lined up (X direction in FIG. 3) is referred to as “left-right direction”, one side in the left-right direction (X1 direction side) is the “right” side, and the other side ( X2 direction side) is the “left” side. The left-right direction (X direction) of this form is a 2nd direction. In the following description, when the two terminal pins 26 are distinguished from each other, one terminal pin 26 of the two terminal pins 26 is referred to as a “first terminal pin 26 </ b> A” and the other terminal pin 26. Is “second terminal pin 26B”. In this embodiment, the first terminal pin 26A is arranged on the right side, and the second terminal pin 26B is arranged on the left side.

  A lower end surface 30d of the outer flange portion 30c is formed in a planar shape that is orthogonal to the vertical direction. As shown in FIG. 4, two projections 30e and 30f are formed on the lower end surface 30d. The protrusions 30e and 30f are formed in a substantially columnar shape (bar shape). Specifically, the protrusions 30e and 30f are formed in a substantially cylindrical shape. The protrusion 30e is disposed on the right side of the first terminal pin 26A, and the protrusion 30f is disposed on the left side of the second terminal pin 26B. The protrusions 30e and 30f may be formed in a substantially polygonal column shape such as a substantially quadrangular column shape.

  A gap is formed between the root (upper end) of the protrusion 30e and the root of the first terminal pin 26A. The protrusion 30e is formed so as to protrude obliquely downward to the left from the lower end surface 30d, and the tip (lower end) of the protrusion 30e is tilted so as to be directed to the first terminal pin 26A. For example, the protrusion 30e is tilted so that the distal end side of the protrusion 30e is in contact with the proximal end portion (upper end portion) of the first terminal pin 26A.

  A gap is formed between the root (upper end) of the protrusion 30f and the root of the second terminal pin 26B. Further, the protrusion 30f is formed so as to protrude obliquely downward to the right from the lower end surface 30d, and the tip (lower end) of the protrusion 30f is tilted so as to face the second terminal pin 26B. For example, the protrusion 30f is tilted so that the distal end side of the protrusion 30f is in contact with the proximal end portion (upper end portion) of the second terminal pin 26B.

  The coil 23 is constituted by a conducting wire made of an aluminum alloy or a copper alloy. The coil 23 is wound around the cylindrical portion 25 a of the bobbin 25. That is, the coil 23 is wound around the salient pole part 24 b via the cylindrical part 25 a, and the stator 6 includes six coils 23. One end of the coil 23 is wound around and fixed to the distal end side portion (lower end side portion) of the first terminal pin 26A. The other end of the coil 23 is wound around and fixed to the tip end portion (lower end portion) of the second terminal pin 26B. Specifically, one end portion of the coil 23 is soldered and fixed in a state of being wound around the distal end portion of the first terminal pin 26A, and the other end portion of the coil 23 is secured to the distal end side of the second terminal pin 26B. Soldered and fixed in a state of being wound around the part.

  As shown in FIG. 4, assuming that one end portion of the coil 23 fixed to the tip end portion of the first terminal pin 26 </ b> A is a fixing portion 23 a and a portion of the coil 23 wound around the cylindrical portion 25 a is a winding portion 23 b. In addition, a slack portion 23c is formed between the fixed portion 23a and the winding portion 23b of the coil 23 so as to be slackened between the proximal end portion of the first terminal pin 26A and the protrusion 30e. . The slack portion 23c is a portion of the coil 23 wound in a slack state so as to alternately pass the left side of the proximal end portion of the first terminal pin 26A and the right side of the protrusion 30e. This is a portion loosely wound around the proximal end portion of the one terminal pin 26A and the protrusion 30e.

  Further, when the other end portion of the coil 23 fixed to the tip side portion of the second terminal pin 26B is a fixing portion 23d, the second terminal pin is interposed between the fixing portion 23d and the winding portion 23b of the coil 23. A slack portion 23e wound in a slack state is formed between the base end side portion of 26B and the protrusion 30f. The slack portion 23e is a portion of the coil 23 wound in a slack state so as to alternately pass through the right side of the proximal end portion of the second terminal pin 26B and the left side of the projection 30f. This is a portion loosely wound around the proximal end portion of the two-terminal pin 26B and the protrusion 30f.

  In this embodiment, one coil 23, one bobbin 25, and two terminal pins 26 (first terminal pin 26A and second terminal pin 26B) constitute a coil component 36, and the stator 6 Includes six coil components 36.

(Motor manufacturing method)
FIG. 5 is a diagram for explaining a method of manufacturing the motor 3 shown in FIG. FIG. 6 is a plan view of the core core 54 to be the stator core 24 shown in FIG.

  The motor 3 is manufactured as follows. First, each of the first terminal pin 26A and the second terminal pin 26B is press-fitted and fixed to the outer flange portion 30c of the first bobbin 30 from the lower side (terminal pin fixing step). The outer flange 30c at this stage is formed with a protrusion 30g as a first protrusion that becomes a protrusion 30e after a protrusion forming process, which will be described later, and a protrusion 30h as a second protrusion that becomes a protrusion 30f after the protrusion forming process. (See FIGS. 3 and 5). The protrusions 30g and 30h are formed in a columnar shape (bar shape) corresponding to the shape of the protrusions 30e and 30f. Specifically, the protrusions 30g and 30h are formed in a columnar shape. The protrusions 30g and 30h may be formed in a polygonal column shape such as a quadrangular column shape.

  The protrusions 30g and 30h are formed on the lower end surface 30d so as to rise downward from the lower end surface 30d. The length of the protrusions 30g and 30h (length in the axial direction (vertical direction)) is less than or equal to half the length of the terminal pin 26 protruding from the lower end surface 30d. The protrusion 30g is disposed on the right side of the first terminal pin 26A with a space between the protrusion 30g and the first terminal pin 26A, and the protrusion 30g and the first terminal pin 26A are parallel to each other. The protrusion 30h is disposed on the left side of the second terminal pin 26B with a space between the protrusion 30h and the second terminal pin 26B, and the protrusion 30h and the second terminal pin 26B are parallel to each other.

  After the terminal pin fixing step, the bobbin 25 is attached to the core base 54 (see FIG. 6) that becomes the stator core 24 after the stator core forming step described later (bobbin attaching step). As shown in FIG. 6, the core core 54 is composed of a linear belt-like portion 54 b composed of six outer peripheral portions 24 e connected via a bent portion 54 a and a belt-like portion from each of the six outer peripheral portions 24 e. And six salient pole portions 24b projecting in a direction orthogonal to the longitudinal direction of 54b. In the bobbin attaching step, the bobbin 25 is attached to each of the six outer peripheral portions 24e and the salient pole portions 24b. Specifically, the first bobbin 30 to which the terminal pin 26 is fixed is attached from the lower side and the second bobbin 31 is attached from the upper side to each of the six outer peripheral portions 24e and the salient pole portions 24b. Note that a terminal pin fixing step may be performed after the bobbin mounting step.

  Thereafter, the core core 54 to which the bobbin 25 is attached is attached to a winding machine (not shown), and the coil 23 is wound by the winding machine. Specifically, first, one end of the coil 23 is wound around the tip side portion of the first terminal pin 26A (first coil end processing step). In the first coil end portion processing step, for example, one end portion of the coil 23 is wound around the tip end portion of the first terminal pin 26A three times (three rounds).

  Thereafter, a part of the coil 23 is wound around the proximal end portion of the first terminal pin 26A and the protrusion 30g (second coil end processing step). Specifically, in the second coil end processing step, as shown in FIG. 5, a part of the coil 23 alternately passes through the left side of the base end side portion of the first terminal pin 26A and the right side of the protrusion 30g. Next, a part of the coil 23 is wound around the proximal end portion of the first terminal pin 26A and the protrusion 30g. In the second coil end processing step, for example, a part of the coil 23 is wound three times around the base end side portion of the first terminal pin 26A and the protrusion 30g.

  Thereafter, a part of the coil 23 is wound around the cylindrical portion 25a of the bobbin 25 (coil winding step). Specifically, in the coil winding step, the most part of the coil 23 is wound around the cylindrical portion 25a a plurality of times so that the conducting wires constituting the coil 23 overlap in the radial direction of the cylindrical portion 25a.

  Thereafter, a part of the coil 23 is wound around the base end side portion of the second terminal pin 26B and the protrusion 30h (third coil end processing step). Specifically, in the third coil end processing step, as shown in FIG. 5, a part of the coil 23 alternately passes through the right side of the base end side portion of the second terminal pin 26B and the left side of the protrusion 30h. Next, a part of the coil 23 is wound around the proximal end portion of the second terminal pin 26B and the protrusion 30h. In the third coil end processing step, for example, a part of the coil 23 is wound three times around the base end side portion of the second terminal pin 26B and the protrusion 30h.

  Thereafter, the other end of the coil 23 is wound around the tip end portion of the second terminal pin 26B (fourth coil end processing step). In the fourth coil end processing step, for example, the other end of the coil 23 is wound three times around the tip end portion of the second terminal pin 26B. When the fourth coil end portion processing step is finished, the state of the lower end side portion of the outer flange portion 30c becomes the state shown in FIG. In addition, when the fourth coil end processing step is finished, the core core 54 to which the coil 23, the bobbin 25 and the terminal pin 26 are attached is removed from the winding machine.

  Thereafter, one end of the coil 23 is soldered and fixed to the tip side portion of the first terminal pin 26A, and the other end of the coil 23 is soldered and fixed to the tip side portion of the second terminal pin 26B ( Solder fixing process).

  Thereafter, the projection 30g is deformed so that the projection 30g is tilted toward the first terminal pin 26A to form the projection 30e, and the projection 30h is deformed so that the projection 30h is tilted toward the second terminal pin 26B. 30f is formed (projection forming step). That is, in the projection forming step, the projection 30g is tilted so that the tip of the projection 30g moves to the left, and the projection 30h is tilted so that the tip of the projection 30h moves to the right. Further, in the protrusion forming step, hot air is applied to the protrusions 30g and 30h using a dryer or the like to deform the protrusions 30g and 30h. This protrusion forming process is performed automatically. When the protrusions 30g and 30h are deformed and the protrusions 30e and 30f are formed in the protrusion forming step, the slack portions 23c and 23e are formed. In addition, after performing a protrusion formation process after a 4th coil edge part process process, you may perform a solder fixing process.

  Thereafter, the belt-like portion 54b is bent so that the straight belt-like portion 54b becomes an annular outer ring portion 24a and the salient pole portion 24b protrudes inside the outer ring portion 24a in the radial direction. The end portions of the belt-like portion 54b are joined by welding or the like by bending at 54a (stator core forming step). When the stator core forming step is completed, the stator 6 is completed. In addition, after performing a stator core formation process after a 4th coil edge part process process, you may perform a solder fixing process and a protrusion formation process. Moreover, after performing a stator core formation process, you may perform a bobbin attachment process and may perform each process in the order mentioned above after that.

  Thereafter, the cylindrical portion 11 b of the partition wall 11 a is inserted into the inner peripheral side of the stator 6, and the circuit board 4 is fixed to the bottom portion 11 c with screws 34, and the terminal pins 26 are soldered and fixed to the circuit board 4. Thereafter, the partition wall member 11 to which the circuit board 4 and the stator 6 are fixed is placed in a mold, and a resin material is injected into the mold and cured to form the resin sealing member 12. That is, the resin sealing member 12 is formed by injecting a resin material onto the partition wall member 11 in a state where the circuit board 4 and the stator 6 are fixed. Thereafter, after the rotor 5 is arranged on the inner peripheral side of the cylindrical portion 11b, the impeller 2 is fixed to the holding member 16, and then the upper case 8 is fixed to the housing 7, whereby the motor 3 is completed and the pump device 1 is Complete.

(Main effects of this form)
As described above, in this embodiment, the slack portion 23c is formed between the fixing portion 23a and the winding portion 23b of the coil 23, and the slackness between the fixing portion 23d and the winding portion 23b of the coil 23 is formed. A portion 23e is formed. For this reason, in this embodiment, it is possible to suppress disconnection of the coil 23 when the terminal pin 26 moves downward, which is the direction in which the terminal pin 26 is removed from the bobbin 25. For example, in this embodiment, the resin sealing member 12 is formed by placing the partition wall member 11 to which the circuit board 4 and the stator 6 are fixed in a mold, and injecting a resin material into the mold and curing the resin material. Therefore, a force for pushing down the circuit board 4 acts on the circuit board 4 due to the injection pressure of the resin material injected into the mold when the resin sealing member 12 is formed. Although the fixed terminal pin 26 may move downward with respect to the bobbin 25, even if the terminal pin 26 moves downward with respect to the bobbin 25, it becomes possible to suppress disconnection of the coil 23. .

  In this embodiment, after winding one end of the coil 23 around the distal end portion of the first terminal pin 26A in the first coil end processing step, the base end of the first terminal pin 26A in the second coil end processing step. A portion of the coil 23 is wound around the side portion and the protrusion 30g, and after the portion of the coil 23 is wound around the proximal end portion of the second terminal pin 26B and the protrusion 30h in the third coil end processing step, In the end processing step, the other end portion of the coil 23 is wound around the tip side portion of the second terminal pin 26B, and in the projection forming step, the projection 30g is deformed so that the projection 30g is tilted toward the first terminal pin 26A. The slack portions 23c and 23e are formed by deforming the protrusion 30h so that the protrusion 30h is tilted toward the second terminal pin 26B. Therefore, in this embodiment, the coil is routed so that the coil with a small wire diameter does not come off from the shoulder, and finally a slack is formed by removing the coil with a small wire diameter that is hung on the shoulder from the shoulder. Compared with the conventional coil winding operation, the winding operation of the coil 23 around the bobbin 25 can be simplified. Moreover, in this form, since the 1st-4th coil edge part process process is performed by the winding machine and the protrusion formation process is also performed automatically, the winding operation | work of the coil 23 to the bobbin 25 is efficiently performed. It becomes possible to do.

  In this embodiment, in the protrusion forming step, hot air is applied to the protrusions 30g and 30h to deform the protrusions 30g and 30h. Therefore, in this embodiment, the protrusions 30g and 30h can be deformed without bringing a jig or the like for deforming the protrusions 30g and 30h into contact with the protrusions 30g and 30h in the protrusion forming step. Therefore, in this embodiment, it is possible to suppress disconnection of the coil 23 due to the jig or the like coming into contact with the coil 23 in the protrusion forming step.

  In this embodiment, of the two terminal pins 26 arranged in the left-right direction, the protrusion 30g is arranged on the right side of the first terminal pin 26A arranged on the right side, and the second terminal pin 26B arranged on the left side. A protrusion 30h is arranged on the left side. Therefore, in this embodiment, the first terminal pin 26A and the protrusion 30g are compared with the case where the protrusion 30g is disposed on the left side of the first terminal pin 26A and the protrusion 30h is disposed on the right side of the second terminal pin 26B. The distance between the second terminal pin 26B and the protrusion 30h in the left-right direction can be increased. Therefore, in this embodiment, in the second coil end processing step, the coil 23 can be easily wound by the winding machine around the proximal end portion of the first terminal pin 26A and the protrusion 30g, and in the third coil end processing step. The coil 23 can be easily wound around the proximal end portion of the second terminal pin 26B and the protrusion 30h by a winding machine.

(Other embodiments)
The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited to this, and various modifications can be made without departing from the scope of the present invention.

  In the embodiment described above, as shown in FIG. 7, the left side (that is, the first terminal pin 26A side) of the root portion (upper end portion) of the protrusion 30g and the right side (that is, the upper end portion) of the protrusion 30h (that is, the upper end portion). A notch 30j may be formed on the second terminal pin 26B side). In this case, in the protrusion forming step, the protrusion 30g is easily deformed so that the protrusion 30g is inclined toward the first terminal pin 26A, and the protrusion 30h is deformed so that the protrusion 30h is inclined toward the second terminal pin 26B. It becomes easy to let you.

  In the above-described embodiment, the protrusions 30g and 30h are deformed by applying hot air to the protrusions 30g and 30h in the protrusion forming step. However, in the protrusion forming step, the protrusions 30g and 30h may be deformed by other methods. . For example, the protrusions 30g and 30h may be deformed by applying a heated chip to the protrusions 30g and 30h. In the embodiment described above, the protrusion 30g is disposed on the right side of the first terminal pin 26A. However, the protrusion 30g may be disposed on the left side of the first terminal pin 26A. In the embodiment described above, the protrusion 30h is disposed on the left side of the second terminal pin 26B. However, the protrusion 30h may be disposed on the right side of the second terminal pin 26B.

  In the embodiment described above, the coil component 36 is completed by winding the coil 23 after the bobbin 25 to which the terminal pin 26 is fixed is attached to the salient pole portion 24b of the stator core 24, but the terminal pin 26 is fixed. After the coil 23 is wound around the bobbin 25 and the coil component 36 is completed, the coil component 36 may be attached to the salient pole portion of the stator core where the salient pole tip portion is not formed. In the above-described embodiment, the bobbin 25 is configured by the first bobbin 30 and the second bobbin 31 that can be divided in the vertical direction. However, the bobbin 25 is an integral type that cannot be divided in the vertical direction. Also good.

  In the embodiment described above, the stator core 24 is a curling core, but the stator core 24 may be a so-called divided core formed by combining a plurality of cores divided in the circumferential direction. The stator core 24 may be an integrated annular core formed by laminating thin magnetic plates formed in an annular shape. In the above-described form, the six first bobbins 30 and the second bobbins 31 are divided for each salient pole portion 24b. However, the six first bobbins 30 are integrally formed, and the six first bobbins 30 are formed integrally. The two bobbins 31 may be integrally formed. That is, six coil components 36 may be integrally formed.

  In the embodiment described above, the motor 3 is used for the pump device 1, but the motor 3 may be used for other than the pump device 1. In the above-described embodiment, the coil component 36 is used in the so-called inner rotor type motor 3 in which the rotor 5 is disposed on the inner peripheral side of the stator 6, but the coil component 36 is disposed on the outer peripheral side of the stator 6. You may use for what is called an outer rotor type | mold motor with which the rotor 5 is arrange | positioned. Moreover, in the form mentioned above, although the coil component 36 is used with the motor 3, the coil component 36 may be used with a generator.

3 Motor 4 Circuit board 5 Rotor 6 Stator 11 Partition member 11a Partition 12 Resin sealing member 14 Driving magnet 23 Coil 23a, 23d Fixing portion 23b Winding portion 23c, 23e Slack portion 25 Bobbin 25a Tube portion 26 Terminal pin 26A 1st Terminal pin 26B Second terminal pin 30c Outer collar (buttock)
30d Lower end surface (surface on the first direction side of the flange)
30e, 30f Protrusion 30g Protrusion (first protrusion)
30h Protrusion (second protrusion)
30j Notch 36 Coil part X 2nd direction Z2 1st direction

Claims (7)

A coil, a bobbin having a cylindrical tube around which the coil is wound, and two terminal pins held by the bobbin,
The bobbin includes a flange portion formed so as to spread from one end of the cylindrical portion in a direction orthogonal to the axial direction of the cylindrical portion,
The two terminal pins are held by the flange so as to protrude from the flange,
Assuming that the projecting direction of the terminal pin from the flange portion is the first direction, two protrusions whose front ends are inclined so as to face each of the two terminal pins on the surface of the flange portion in the first direction. Formed,
The end of the coil is a fixed part that is wound around and fixed to the tip side portion of the terminal pin,
When a portion of the coil that is wound around the tube portion is a winding portion, a base end side portion of the terminal pin and the protrusion are provided between the fixing portion and the winding portion of the coil. A coil component, wherein a slack portion wound in a slack state is formed. The two terminal pins are held in the collar portion in a state of being aligned,
When the direction in which the two terminal pins are arranged is a second direction, one of the two protrusions is a second direction of the terminal pin arranged on one side of the second direction. 2. The coil according to claim 1, wherein the other protrusion is disposed on the other side in the second direction of the terminal pin disposed on the other side in the second direction. parts. A stator having a coil part according to claim 1 and formed in a cylindrical shape, a rotor having a driving magnet and disposed on an inner peripheral side of the stator, at least an outer peripheral surface of the rotor, and the stator A partition member having a substantially bottomed cylindrical partition wall disposed between the inner peripheral surface, a circuit board fixed to the partition wall outside the partition wall in the axial direction of the rotor, the stator, and the circuit board And a resin sealing member made of resin that covers
The terminal pin protrudes toward the circuit board,
The motor is characterized in that the tip end side of the terminal pin is soldered and fixed to the circuit board. It is a manufacturing method of the coil components according to claim 1 or 2,
When one of the two terminal pins is a first terminal pin and the other terminal pin is a second terminal pin,
A terminal pin fixing step for press-fitting and fixing the first terminal pin and the second terminal pin into the flange;
After the terminal pin fixing step, a first coil end processing step of winding one end of the coil around the tip side portion of the first terminal pin;
After the first coil end portion processing step, the flange is formed on the first direction side surface of the flange portion so as to rise from the first direction side surface of the flange portion toward the first direction side. A second coil end processing step of winding a part of the coil around a first protrusion and a base end side portion of the first terminal pin that are arranged with a gap therebetween;
A coil winding step of winding a part of the coil around the cylindrical portion after the second coil end processing step;
After the coil winding step, the gap is formed on the first direction side surface of the flange portion so as to rise from the first direction side surface of the flange portion to the first direction side. A third coil end processing step of winding a part of the coil around the second protrusion and the base end side portion of the second terminal pin arranged in a state of opening
After the third coil end processing step, a fourth coil end processing step of winding the other end of the coil around the tip side portion of the second terminal pin;
After the fourth coil end processing step, the first protrusion is deformed so that the first protrusion falls down toward the first terminal pin to form the protrusion, and toward the second terminal pin. And a protrusion forming step of forming the protrusion by deforming the second protrusion such that the second protrusion falls down. The bobbin is made of resin,
5. The method of manufacturing a coil component according to claim 4, wherein, in the protrusion forming step, hot air is applied to the first protrusion and the second protrusion to deform the first protrusion and the second protrusion.   After the fourth coil end processing step and before the protrusion forming step, one end of the coil is soldered and fixed to the tip side portion of the first terminal pin, and the second 6. The method of manufacturing a coil component according to claim 4, further comprising a solder fixing step of soldering and fixing the other end portion of the coil to a tip side portion of the terminal pin.   A notch is formed on the first terminal pin side of the root portion of the first protrusion and on the second terminal pin side of the root portion of the second protrusion. Item 7. A method for manufacturing a coil component according to any one of Items 4 to 6.

Images