JP2010034223A - Coil component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil component that suppresses breaking of a conducting line even when metal terminals and a bobbin are not integrated by insert molding. <P>SOLUTION: The coil component includes the bobbin 12, the metal terminals 13A and 13B, the conducting line forming a winding coil, a resin member formed by overmolding, etc. The bobbin 12 has terminal insertion portions 22A and 22B into which the metal terminals 13A and 13B are inserted, and a resin storage portion 23 communicating with the terminal insertion portions 22A and 22B. The metal terminals 13A and 13B have fixed portions 31 and 32 exposed from the resin storage portion 23 of the bobbin 12. The resin member is put in the resin storage portion 23 to engage the fixed portions 31 and 32 of the metal terminals 13A and 13B, thereby suppressing movements of the metal terminals 13A and 13B. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a coil component that is manufactured by sealing a winding coil with a resin member, and more particularly to a coil component that is suitable when using an ABS coil of an automobile.

  In recent years, automobiles equipped with ABS (Antilock braking system) have become widespread. ABS is a system capable of sudden braking without locking tires in order to ensure steering performance such as emergency avoidance. In the ABS, a coil component (also referred to as a solenoid coil) is used to operate a hydraulic valve that pressurizes and depressurizes brake oil. This coil component is installed in the engine room of an automobile.

  Such a coil component has a resin bobbin with a through hole in the center, a metal terminal fixed to the bobbin, and a winding coil formed by being wound around the bobbin. A conductive wire connected to the terminal and a resin member for sealing the winding coil are provided. The resin member is formed integrally with the bobbin by overmolding.

  A conventional coil component is manufactured by press-fitting and fixing a metal terminal on a bobbin formed by injection molding (see, for example, Patent Document 1). In this case, a winding step of forming a winding coil by winding a conductive wire around a bobbin in which a metal terminal is press-fitted and fixed, a soldering step of connecting the end of the conductive wire to the metal terminal, and winding with a resin member by overmolding A coil component is manufactured by performing a sealing process for sealing the coil.

  In addition, as a conventional coil component, there is one in which a bobbin and a metal terminal are integrally manufactured by insert molding (see, for example, Patent Document 2). In this case, a coil component is manufactured by performing the winding process, the soldering process, and the sealing process described above on the bobbin integrated with the metal terminal.

JP 2008-42744 A JP-A-9-283317

However, a coil component manufactured by press-fitting a metal terminal into a bobbin formed by injection molding is likely to cause disconnection of a conductive wire.
Here, the disconnection of the conductive wire will be described.

  Coil components installed in the engine room of an automobile are subjected to a load caused by an external environment such as temperature, humidity, impact, vibration, and dust. Since an engine that generates high heat is disposed in the engine room, among the loads caused by the external environment described above, the load due to temperature (heat) is particularly large. Also, when a vehicle is used in an area where the temperature difference is large, the load due to temperature increases. And when a coil component receives the load by temperature, expansion / contraction will arise in each component part.

FIG. 8A is a longitudinal sectional view of a conventional coil component.
The coil component 101 includes a resin bobbin 102, a metal terminal 103, a conductive wire 104, and a resin member 105.

  The bobbin 102 is formed by injection molding, and a metal terminal 103 is press-fitted and fixed to the bobbin 102. The conductive wire 104 is wound around the bobbin 102 to form a winding coil 106. An end portion of the conductive wire 104 is connected to a connection portion 107 provided on the metal terminal 103. The resin member 105 is formed integrally with the bobbin 102 by overmolding, and seals the ends of the winding coil 106 and the conductive wire 104. The resin member 105 covers substantially the entire metal terminal 103 except for the tip.

  By the way, when a thermal load is applied to the coil component 100 described above, each component part of the coil component 100 expands / contracts according to a specific linear expansion coefficient of each material. The linear expansion coefficient of the resin member 105 is very large compared to the linear expansion coefficient of the metal material constituting the metal terminal 103 and the conductive wire 104. Therefore, the expansion / contraction behavior generated in the resin member 105 is much larger than the expansion / contraction behavior generated in the metal terminal 103 and the winding coil 106. Therefore, here, the expansion / contraction behavior that occurs in the resin member 105 will be described.

  When expansion / contraction behavior occurs in the resin member 105 due to the thermal load, the metal terminal 103 that is only press-fitted into the bobbin 102 moves according to the behavior of the resin member 105. When the metal terminal 103 moves, stress is generated in the conductive wire 104 connected to the metal terminal 103, and the conductive wire 104 is disconnected.

Next, the movement of the metal terminal 103 according to the behavior of the resin member 105 will be described with reference to FIG. 8B.
FIG. 8B is an enlarged view of the region T shown in FIG. 8A.

  As shown in FIG. 8B, the end portion of the conductive wire 104 is guided along the outer surface of the bobbin 102 and connected to the connection portion 107 of the metal terminal 103. As described above, when the coil component 100 is subjected to a thermal load, the resin member 105 undergoes expansion / contraction behavior.

  In the vicinity of the metal terminal 103 of the resin member 105, for example, when a behavior occurs in the Y direction that is opposite to the insertion (press-in) direction of the metal terminal 103, the metal terminal 103 press-fitted and fixed to the bobbin 102 moves in the Y direction. To do. That is, the metal terminal 103 moves in the direction opposite to the insertion direction.

  When the metal terminal 103 moves in the direction opposite to the insertion direction, stress is generated at the end portion of the conductive wire 104 guided along the outer surface of the bobbin 102. Therefore, the end portion of the conductive wire 104 is disconnected. As described above, when a coil component manufactured by press-fitting a metal terminal into a bobbin formed by injection molding is subjected to a load due to temperature (heat), the conductive wire is likely to be disconnected.

  On the other hand, a coil component manufactured by integrating a metal terminal and a bobbin by insert molding has little movement of the metal terminal 103 even if the resin member undergoes expansion / contraction behavior under a load due to temperature (heat). Therefore, disconnection of the conductive wire can be prevented or suppressed.

  However, coil parts manufactured by integrating metal terminals and bobbins by insert molding require a complicated and expensive mold, which increases costs. In addition, insert molding has a problem of hindering improvement in productivity because the molding tact (time) becomes long.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a coil component that can suppress disconnection of a conductive wire without integrating a metal terminal and a bobbin by insert molding. Is to provide.

  The coil component of the present invention includes a bobbin, a metal terminal, a conductive wire, and a resin member. The bobbin has a terminal insertion part into which a metal terminal is inserted and a resin housing part that communicates with the terminal insertion part. The metal terminal has a fixing portion exposed to the resin housing portion of the bobbin. The conductive wire is wound around a bobbin to form a winding coil, and the end is connected to a metal terminal. The resin member is formed integrally with the bobbin by overmolding. And a resin member suppresses a movement of the metal terminal by entering in the resin accommodating part of a bobbin, and engaging with the fixing | fixed part of a metal terminal.

  In the coil component of the present invention, the resin member formed by overmolding enters the resin housing portion of the bobbin and suppresses the movement of the metal terminal. Accordingly, even when the coil component receives a load due to the external environment and the resin member undergoes expansion / contraction behavior, the movement of the metal terminal is small. As a result, it is possible to prevent stress from being generated at the end portion of the conductive wire connected to the metal terminal, and it is possible to suppress disconnection of the conductive wire.

  According to the coil component of the present invention, disconnection of the conductive wire can be suppressed without integrating the metal terminal and the bobbin by insert molding.

  Hereinafter, the best mode for carrying out the coil component of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following mode. Moreover, the following form demonstrates as an example which applied the coil components of this invention to the ABS coil which comprises some ABS systems.

1. First Embodiment [Configuration Example of Coil Parts]
FIG. 1 is a perspective view showing an internal coil 2 obtained by removing a resin member from the configuration of the first embodiment of the coil component of the present invention. The coil component 1 according to the first embodiment includes an internal coil 2 and a resin member 3 (see FIG. 4).

  The internal coil 2 is wound by being wound around the resin bobbin 12 formed by injection molding, the first metal terminal 13A and the second metal terminal 13B attached to the bobbin 12, and the bobbin 12. It is composed of a conductive wire 14 that forms a coil 16.

  The conductive wire 14 is made of a wire made of copper, aluminum, or the like, and is wound around the bobbin 12 so as to obtain desired electromagnetic characteristics. End portions 14a and 14b of the conductive wire 14 are connected to metal terminals 13A and 13B, respectively.

FIG. 2 is an exploded perspective view showing the bobbin 12 and the first and second metal terminals 13A and 13B.
As shown in FIG. 2, the bobbin 12 includes a winding core portion 18 around which the conductive wire 14 is wound, flange portions 19 and 20 formed at both ends of the winding core portion 18, and terminals provided on the flange portion 19. The mounting portion 21 is included. The core part 18 is formed in a cylindrical shape. A hydraulic valve (not shown) constituting a part of the ABS system is movably inserted into the cylindrical hole 18a of the winding core portion 18. When a current flows through the winding coil 16, the hydraulic valve moves in the axial direction of the cylindrical hole 18a, and opens and closes a hydraulic pipe (not shown).

  The flange portions 19 and 20 are formed in a ring shape that protrudes radially outward from the peripheral surface of the core portion 18. In FIG. 2, the thickness of the flange portion 19 formed at the upper end of the core portion 18 is greater than the thickness of the flange portion 20 formed at the lower end of the core portion 18. The flange portion 19 is provided with a notch 19a that exposes a part of the terminal attachment portion 21. The notch 19 a extends in the thickness direction of the flange portion 19, and forms a guide portion that guides both ends of the conductive wire 14 between the notch 19 a and the terminal mounting portion 21.

  The terminal attachment portion 21 is formed in a vertically long rectangular parallelepiped shape extending in the thickness direction of the flange portion 19, and an upper portion protrudes above the flange portion 19. That is, the terminal mounting portion 21 has an upper surface 21a parallel to the flat portion of the flange portion 19, a front surface 21b and a rear surface 21c orthogonal to a line extending in the radial direction from the center of the flange portion 19, and left and right side surfaces 21d and 21e. is doing.

  The terminal mounting portion 21 includes a first terminal insertion portion 22A into which the first metal terminal 13A is inserted, a terminal insertion portion 22B into which the second metal terminal 13B is inserted, and the terminal insertion portions 22A and 22B. A resin accommodating portion 23 that communicates is provided.

  Each of the terminal insertion portions 22A and 22B is formed as a rectangular square hole opened in the upper surface 21a of the terminal mounting portion 21, and has an appropriate interval in a direction orthogonal to the left and right side surfaces 21d and 21e of the terminal mounting portion 21. It is arranged with a gap. These terminal insertion portions 22A and 22B have two long sides extending in a direction orthogonal to the left and right side surfaces 21d and 21e, and two short sides orthogonal to these two long sides, and a direction orthogonal to the upper surface 21a ( It extends in the thickness direction of the flange 19.

  The resin accommodating portion 23 is formed as a rectangular through hole that penetrates the front surface 21 b and the rear surface 21 c of the terminal mounting portion 21. The resin housing portion 23 has an upper surface 23a, a lower surface 23b, and left and right side surfaces 23c and 23d, and extends in a direction substantially perpendicular to the insertion / removal direction of the metal terminals 13A and 13B.

  The resin accommodating portion 23 is set to a size that intersects with part of the terminal insertion portions 22A and 22B perpendicularly. Therefore, the resin accommodating portion 23 has a first opening 24 that becomes a communication portion with the first terminal insertion portion 22A and a second opening 25 that becomes a communication portion with the second terminal insertion portion 22B. Is formed. The first opening 24 is formed continuously from the upper surface 23a, the left side surface 23c, and the lower surface 23b of the resin housing portion 23, and has a U-shaped longitudinal section. Similarly, the 2nd opening part 25 is continuously formed in the upper surface 23a of the resin accommodating part 23, the right side surface 23d, and the lower surface 23b, and the shape of a longitudinal cross-section is U shape.

  The first and second metal terminals 13A and 13B are formed by punching a conductive single plate made of phosphor bronze, brass or the like.

  The first metal terminal 13A includes an insertion piece 28a to be inserted into the first terminal insertion portion 22A, a connection piece 28b to which one end of the conductive wire 14 is connected, and a terminal piece to be electrically connected to an external device. 28c. Similarly, the second metal terminal 13B is electrically connected to an insertion piece 29a inserted into the second terminal insertion portion 22B, a connection piece 29b to which the other end of the conductive wire 14 is connected, and an external device. Terminal piece 29c.

  The connecting pieces 28b and 29b are bent so as to sandwich the end portions of the conductive wires 14, respectively. Then, both ends of the conductive wire 14 and the connection pieces 28b and 29b are welded by welding means such as resistance welding or soldering in a state where the connection pieces 28b and 29b sandwich the end of the conductive wire 14. Thereby, the connection pieces 28b and 29b and the both ends of the conductive wire 14 are firmly connected and formed as a highly reliable connection portion. Further, the terminal pieces 28c and 29c are bent about 90 degrees inward in the radial direction of the flange portion 19 before the resin member 3 is formed by overmolding described later (see FIG. 4).

  The insertion pieces 28a and 29a are set to sizes corresponding to the terminal insertion portions 22A and 22B, respectively, and are press-fitted into the terminal insertion portions 22A and 22B. The insertion pieces 28 a and 29 a are provided with fixing portions 31 and 32 exposed to the resin housing portion 23. The fixing portions 31 and 32 are formed by cutting out the mutually opposing surfaces of the insertion pieces 29a and 29b into rectangles.

  The fixing portion 31 is set to a size corresponding to the first opening 24 of the resin housing portion 23, and includes a first plane 31a and a second plane 31b orthogonal to the insertion / removal direction of the first metal terminal 13A, It has a third plane 31c parallel to the insertion / removal direction of the first metal terminal 13A. On the other hand, the fixed portion 32 is set to a size corresponding to the second opening 25 of the resin accommodating portion 23, and the first plane 32a and the second plane orthogonal to the insertion / removal direction of the second metal terminal 13B. 32b and a third plane 32c parallel to the insertion / removal direction of the second metal terminal 13B.

  Next, a state where the metal terminals 13A and 13B are attached to the bobbin 12 will be described with reference to FIG. 3 is a cross-sectional view taken along line AA shown in FIG.

  When the first metal terminal 13A is press-fitted into the terminal insertion portion 22A of the bobbin 12, the fixing portion 31 is exposed from the first opening 24 (see FIG. 2) and has the same plane as the inner surface of the resin housing portion 23. Form. That is, the first plane 31 a and the second plane 31 b of the fixing portion 31 form the same plane as the upper surface 23 a and the lower surface 23 b of the resin accommodating portion 23, respectively, and the third plane 31 c of the fixing portion 31 is the resin accommodating portion 23. The same plane as the left side surface 23c is formed.

  When the second metal terminal 13B is press-fitted into the terminal insertion portion 22B of the bobbin 12, the fixing portion 32 is exposed from the second opening 25 (see FIG. 2) and is the same as the inner surface of the resin housing portion 23. Form a plane. That is, the first plane 32 a and the second plane 32 b of the fixing portion 32 form the same plane as the upper surface 23 a and the lower surface 23 b of the resin accommodating portion 23, respectively, and the third plane 32 c of the fixing portion 32 is the resin accommodating portion 23. The same plane as the right side surface 23d (see FIG. 2) is formed.

Next, the resin member 3 will be described with reference to FIG.
FIG. 4 is a longitudinal sectional view of the coil component 1.

  The resin member 3 is formed by overmolding the internal coil 2. The resin member 3 is integrated with the bobbin 12 and seals the winding coil 16 and the end portions 14 a and 14 b of the conductive wire 14. The resin member 3 covers substantially the entire metal terminals 13A and 13B except for the tip portions of the terminal pieces 28c and 29c.

  The resin member 3 has resistance to protect the internal coil 2 from external environmental conditions such as temperature, humidity, impact, vibration, and dust. As the resin member 3, for example, a thermoplastic resin such as a polyamide-based resin can be applied.

  When overmolding is performed on the internal coil 2, the resin member 3 enters the resin housing portion 23. Fixing portions 31 and 32 provided on the metal terminals 13A and 13B are exposed in the resin housing portion 23 (see FIG. 3). Therefore, the resin member 3 that has entered the resin accommodating portion 23 engages with the fixing portions 31 and 32. And in the state which overmolding was completed, the resin member 3 which entered into the resin accommodating part 23 suppresses a movement of the two metal terminals 13A and 13B.

  That is, when the first flat surface 31a (see FIG. 3) of the fixing portion 31 and the resin member 3 are engaged, the movement of the first metal terminal 13A in the insertion direction is suppressed. Further, the engagement of the second flat surface 31b of the fixing portion 31 and the resin member 3 suppresses the movement of the first metal terminal 13A in the separation direction. And when the 3rd plane 31c of the fixing | fixed part 31 and the resin member 3 engage, the movement to the direction orthogonal to the 3rd plane 31c of the 1st metal terminal 13A is suppressed.

  On the other hand, when the first flat surface 32a of the fixing portion 32 and the resin member 3 are engaged, the movement of the second metal terminal 13B in the insertion direction is suppressed. Further, the second flat surface 32b of the fixing portion 32 and the resin member 3 are engaged, so that the movement of the second metal terminal 13B in the separation direction is suppressed. And when the 3rd plane 32c of the fixing | fixed part 32 and the resin member 3 engage, the movement to the direction orthogonal to the 3rd plane 32c of the 2nd metal terminal 13B is suppressed.

  As a result, even when the expansion / contraction behavior occurs in the resin member 3 due to the thermal load, the movement of the two metal terminals 13A and 13B is suppressed, and the end portion 14a of the conductive wire 14 connected to each metal terminal 13A and 13B. , 14b can be prevented from generating stress.

  Note that the end portions 14a and 14b of the conductive wire 14 are connected to the connection pieces 28b and 29b of the respective metal terminals 13A and 13B while being pulled so as not to be loosened. Therefore, the disconnection of the conductive wire 14 is likely to occur when the metal terminals 13A and 13B move in the detaching direction. Therefore, in the coil component 1 of the present embodiment, the movement of the metal terminals 13A and 13B in the detaching direction is suppressed by engaging the flat surfaces 31b and 32b of the fixing portions 31 and 32 with the resin member 3.

[Manufacturing method of coil parts]
Next, an example of the manufacturing method of the coil component 1 of this Embodiment is demonstrated.

First, the bobbin 12 is manufactured by injection molding. At this time, terminal insertion portions 22A and 22B and a resin housing portion 23 are formed in the terminal mounting portion 21 of the bobbin 12 (see FIG. 2).
Next, the metal terminals 13A and 13B are manufactured. Fixed portions 31 and 32 are provided on the insertion pieces 28a and 28b of the manufactured metal terminals 13A and 13B. The metal terminals 13A and 13B may be manufactured before the bobbin 12 is manufactured.

  Next, the metal terminals 13A and 13B are press-fitted into the terminal insertion portions 22A and 22B of the bobbin 12. Thereby, the fixing | fixed part 31 and 32 of metal terminal 13A, 13B is exposed to the resin accommodating part 23 of the bobbin 12 (refer FIG. 3).

  Next, the conductive wire 14 is wound around the core 18 of the bobbin 12 to form the winding coil 16. Then, the end portions 14a and 14b of the conductive wire 14 are connected to the connection pieces 28b and 29b of the metal terminals 13A and 13B. That is, the connection pieces 28b and 29b are bent to sandwich the end portions 14a and 14b of the conductive wire 14, and both are welded by welding means such as resistance welding or soldering. Thereby, the internal coil 2 (refer FIG. 1) which consists of the bobbin 12, metal terminal 13A, 13B, and the conductive wire 14 is manufactured.

  Next, the resin member 3 that covers the internal coil 2 is formed by overmolding using a mold (not shown). Thereby, the end portions 14a and 14b of the winding coil 16 and the conductive wire 14 are sealed by the resin member 3, and the coil component 1 is manufactured (see FIG. 4).

  At this time, the resin member 3 enters the resin accommodating portion 23 of the bobbin 12 and engages with the fixing portions 31 and 32 of the metal terminals 13A and 13B. As a result, even if the movement of the metal terminals 13A, 13B is suppressed by the resin member 3 and the behavior of expansion / contraction occurs in the resin member 3 due to the thermal load, the end portions of the conductive wires 14 connected to the metal terminals 13A, 13B It can suppress that a stress generate | occur | produces in 14a, 14b.

  When the cross section in the vicinity of the resin housing portion 23 is observed in a state where the coil component 1 is manufactured, it can be confirmed that an interface is formed between the resin housing portion 23 and the resin member 3. In addition, when reinforcing fibers are added to the resin member 3 in order to increase the strength of the bobbin 12 and the resin member 3, it can be confirmed that the orientation states of the reinforcing fibers are different from each other in the vicinity of the resin housing portion 23.

  However, even if an interface is formed between the resin accommodating portion 23 and the resin member 3 or the orientation states of the reinforcing fibers are different from each other, the movement of the metal terminals 13A and 13B is suppressed by the resin member 3, There is no adverse effect on the movement of the metal terminals 13A and 13B. As a result, it is possible to ensure the same effect as when the metal terminals 13A and 13B are insert-molded on the bobbin 12.

[Effect of the first embodiment]
According to the coil component 1 showing the first embodiment, when the resin member 3 is formed by overmolding, a part of the resin member 3 enters the resin accommodating portion 23. The resin member 3 that has entered the resin housing portion 23 engages with the fixing portions 31 and 32 of the metal terminals 13A and 13B, and suppresses the movement of the metal terminals 13A and 13B. As a result, even if expansion / contraction behavior occurs in the resin member 3, it is possible to prevent stress from being generated in the end portions 14a, 14b of the conductive wires 14 connected to the metal terminals 13A, 13B.

  Therefore, disconnection of the conductive wire 14 can be suppressed without integrating the metal terminals 13A and 13B and the bobbin 12 by insert molding. And since it is not necessary to integrate each metal terminal 13A, 13B and the bobbin 12 by insert molding, a yield can be made high and production efficiency can be improved.

  In the coil component 1 according to the first embodiment, the fixing portion 31 provided on the first metal terminal 13A has two planes 31a and 31b orthogonal to the insertion / removal direction of the first metal terminal 13A. And the fixing | fixed part 32 provided in the 2nd metal terminal 13B has two plane 32a, 32b orthogonal to the insertion / removal direction of the 2nd metal terminal 13B. Therefore, by engaging the resin member 3 with the fixing portions 31 and 32 of the metal terminals 13A and 13B, the movement of the metal terminals 13A and 13B in the insertion / removal direction can be reliably suppressed.

  Further, in the coil component 1 of the first embodiment, the resin housing portion 23 is formed as a through hole that penetrates the terminal attachment portion 21. Therefore, when the resin member 3 enters the resin housing portion 23, air escapes from the opening on the side opposite to the opening into which the resin member 3 enters. Therefore, it is possible to prevent a state in which air is sealed between the resin housing portion 23 and the resin member 3, that is, so-called air accumulation.

  In the coil component 1 of the first embodiment, the fixing portions 31 and 32 of the metal terminals 13A and 13B exposed to the resin housing portion 23 are the same plane as the resin housing portion 23. Therefore, in overmolding, the resin member 3 can be poured quickly into the resin housing portion 23, and the work efficiency of overmolding can be improved.

2. Second Embodiment [Configuration Example of Coil Parts]
FIG. 5 explains the second embodiment of the coil component of the present invention and is an exploded perspective view showing a bobbin and a metal terminal.

  The second embodiment of the coil component of the present invention has a configuration similar to that of the coil component 1 of the first embodiment, and the only difference is the terminal mounting portion 43 of the bobbin 42. Therefore, here, the terminal mounting portion 43 of the bobbin 42 will be described, and portions common to the coil component 1 of the first embodiment will be denoted by the same reference numerals and redundant description will be omitted.

  The terminal mounting portion 43 of the bobbin 42 according to the second embodiment is formed in a vertically long rectangular parallelepiped shape extending in the thickness direction of the flange portion 19, and the upper portion protrudes above the flange portion 19. That is, the terminal mounting portion 43 has an upper surface 43a parallel to the flat portion of the flange portion 19, a front surface 43b and a back surface 43c orthogonal to lines extending in the radial direction from the center of the flange portion 19, and left and right side surfaces 43d and 43e. is doing.

  The terminal mounting portion 43 includes a first terminal insertion portion 45A into which the first metal terminal 13A is inserted, a second terminal insertion portion 45B into which the second metal terminal 13B is inserted, and these terminal insertion portions 45A. , 45B, a resin container 46 is provided. Each terminal insertion part 45A, 45B is opened in the upper surface 43a of the terminal attachment part 43, and is formed in the same manner as the terminal insertion part 22A, 22B of the first embodiment.

  The resin accommodating portion 46 is formed as a quadrangular concave portion opened in the front surface 43 b of the terminal mounting portion 43. That is, the resin container 46 has an upper surface 46a, a lower surface 46b, left and right side surfaces 46c and 46d, and a bottom surface 46e, and extends in a direction substantially perpendicular to the insertion / removal direction of the metal terminals 13A and 13B. ing.

  The resin accommodating portion 46 is set to a size that intersects with part of the terminal insertion portions 22A and 22B. Therefore, the resin accommodating portion 46 has a first opening 47 that becomes a communication portion with the first terminal insertion portion 22A and a second opening 48 that becomes a communication portion with the second terminal insertion portion 22B. Is formed. The first opening 47 is formed continuously from the upper surface 46a, the left side surface 46c, and the lower surface 46b of the resin housing portion 46, and has a U-shaped longitudinal section. Similarly, the second opening 48 is continuously formed on the upper surface 46a, the right side surface 46d, and the lower surface 46b of the resin housing portion 46, and has a U-shaped longitudinal section.

  When the first metal terminal 13 </ b> A is press-fitted into the first terminal insertion portion 45 </ b> A, the fixing portion 31 is exposed from the first opening 47 and forms the same plane as the inner surface of the resin housing portion 46. When the second metal terminal 13B is press-fitted into the second terminal insertion portion 45B, the fixing portion 32 is exposed from the second opening 48 and forms the same plane as the inner surface of the resin housing portion 46.

[Effect of the second embodiment]
According to the second embodiment of the coil component, the same effect as that of the coil component 1 of the first embodiment can be obtained. That is, when overmolding is performed on the internal coil according to the second embodiment, a resin member (not shown) enters the resin accommodating portion 46. Then, the resin member that has entered the resin accommodating portion 46 engages with the fixing portions 31 and 32 to suppress the movement of the metal terminals 13A and 13B. As a result, it is possible to prevent stress from being generated at the end portions 14a and 14b (see FIG. 1) of the conductive wire 14 connected to the metal terminals 13A and 13B, and to suppress disconnection of the conductive wire 14. .

  In the second embodiment, for example, overmolding is performed in a state where the inside of the mold is decompressed. Thereby, even if the resin accommodating part 46 is formed as a recessed part, it is possible to prevent the accumulation of air between the resin accommodating part 46 and the resin member.

3. Third Embodiment [Configuration Example of Coil Parts]
FIG. 6 explains a third embodiment of the coil component of the present invention, and is an exploded perspective view showing a bobbin and a metal terminal.

  The third embodiment of the coil component of the present invention has a configuration similar to that of the coil component 1 of the first embodiment, except that the terminal mounting portion 53 of the bobbin 52, the first and Second metal terminals 63A and 63B. Therefore, here, the terminal mounting portion 53 of the bobbin 52 and each of the metal terminals 63A and 63B will be described, and portions common to the coil component 1 of the first embodiment are denoted by the same reference numerals and overlapped. Description is omitted.

  The terminal mounting portion 53 of the bobbin 52 according to the third embodiment is formed in a vertically long rectangular parallelepiped shape extending in the thickness direction of the flange portion 19, and the upper portion protrudes above the flange portion 19. That is, the terminal mounting portion 53 has an upper surface 53a parallel to the flat portion of the flange portion 19, a front surface 53b and a rear surface 53c orthogonal to a line extending in the radial direction from the center of the flange portion 19, and left and right side surfaces 53d and 53e. is doing.

  The terminal mounting portion 53 includes a first terminal insertion portion 55A into which the first metal terminal 63A is inserted, a second terminal insertion portion 55B into which the second metal terminal 63B is inserted, and these terminal insertion portions 55A. , 55B are respectively provided with first and second resin accommodating portions 56A, 56B. Each of the terminal insertion portions 55A and 55B is opened on the upper surface 53a of the terminal attachment portion 53, and is formed in the same manner as the terminal insertion portions 22A and 22B of the first embodiment.

  The resin housing portions 56A and 56B are formed as circular through holes that penetrate the front surface 53b and the back surface 53c of the terminal mounting portion 53. That is, the resin housing portions 56A and 56B extend in a direction substantially perpendicular to the insertion / removal direction of the metal terminals 63A and 63B. These resin accommodating portions 56A and 56B are set to have a diameter smaller than the long sides of the terminal insertion portions 55A and 55B, and intersect the terminal insertion portions 55A and 55B perpendicularly.

  The first metal terminal 63A has an insertion piece 64a, a connection piece 64b, and a terminal piece 64c. The second metal terminal 63B includes an insertion piece 65a, a connection piece 65b, and a terminal piece 65c. The connection pieces 64b and 65b are formed the same as the connection pieces 28b and 29b according to the first embodiment, and the terminal pieces 64c and 65c are formed the same as the terminal pieces 28c and 29c according to the first embodiment. Has been.

  The insertion pieces 64a and 65a are set to sizes corresponding to the terminal insertion portions 55A and 55B, respectively, and are press-fitted into the terminal insertion portions 55A and 55B. The insertion pieces 64a and 65a are provided with fixing portions 67 and 68 exposed to the resin housing portions 56A and 56B. The fixing portions 67 and 68 are circular through holes that penetrate the insertion pieces 64a and 65a, and are formed to have the same diameter as the resin housing portions 56A and 56B, respectively.

  When the first metal terminal 63A is press-fitted into the first terminal insertion portion 55A, the fixing portion 67 is opposed to the first resin storage portion 56A and forms the same peripheral surface as the peripheral surface of the resin storage portion 56A. . When the second metal terminal 63B is press-fitted into the second terminal insertion portion 55B, the fixing portion 68 is opposed to the second resin housing portion 56B, and has the same peripheral surface as the peripheral surface of the resin storage portion 56B. Form.

[Effect of the third embodiment]
According to the third embodiment of the coil component, an effect similar to that of the coil component 1 of the first embodiment can be obtained. That is, when overmolding is performed on the internal coil according to the third embodiment, a resin member (not shown) enters the resin housing portions 56A and 56B. Then, the resin member that has entered the resin accommodating portions 56A and 56B engages with the fixing portions 67 and 68, thereby suppressing the movement of the metal terminals 63A and 63B. As a result, it is possible to prevent stress from occurring at the end portions 14a and 14b (see FIG. 1) of the conductive wire 14 connected to the metal terminals 63A and 63B, and to suppress disconnection of the conductive wire 14. .

  In the third embodiment of the coil component, the fixing portions 67 and 68 of the metal terminals 63A and 63B are formed as circular through holes. Then, when the resin member enters the fixing portions 67 and 68, both are engaged. Therefore, the movement of the metal terminals 63A and 63B can be suppressed in all directions orthogonal to the direction in which the central axes of the fixing portions 67 and 68 extend.

4). Fourth Embodiment [Configuration Example of Coil Parts]
FIG. 7 explains a fourth embodiment of the coil component of the present invention, and is an exploded perspective view showing a bobbin and a metal terminal.

  The fourth embodiment of the coil component of the present invention has the same configuration as that of the coil component 1 of the first embodiment, except that the terminal mounting portion 73 of the bobbin 72 is different from the first and second embodiments. Second metal terminals 83A and 83B. Therefore, here, the terminal mounting portion 73 of the bobbin 72 and each of the metal terminals 83A and 83B will be described, and portions common to the coil component 1 of the first embodiment are denoted by the same reference numerals and overlapped. Description is omitted.

  The terminal mounting portion 73 of the bobbin 72 according to the fourth embodiment is formed in a vertically long rectangular parallelepiped shape extending in the thickness direction of the flange portion 19, and the upper portion protrudes above the flange portion 19. That is, the terminal mounting portion 73 has an upper surface 73a parallel to the flat portion of the flange portion 19, a front surface 73b and a rear surface 73c orthogonal to a line extending in the radial direction from the center of the flange portion 19, and left and right side surfaces 73d and 73e. is doing.

  The terminal mounting portion 73 includes a first terminal insertion portion 75A into which the first metal terminal 83A is inserted, a second terminal insertion portion 75B into which the second metal terminal 83B is inserted, and these terminal insertion portions 75A. , 75B are respectively provided with first and second resin accommodating portions 76A, 76B. Each of the terminal insertion portions 75A and 75B is opened on the upper surface 73a of the terminal mounting portion 73, and is formed in the same manner as the terminal insertion portions 22A and 22B of the first embodiment.

  The first and second resin housing portions 76A and 76B are formed as rectangular through holes that penetrate the front surface 73b and the back surface 73c of the terminal mounting portion 73. That is, the resin housing portions 76A and 76B have two long sides extending in a direction orthogonal to the upper surface 73a of the terminal mounting portion 73 (thickness direction of the flange portion 19) and two short sides orthogonal to these two long sides. And extending in a direction substantially perpendicular to the insertion / removal direction of the metal terminals 83A and 83B. The resin accommodating portions 76A and 76B are set so that the short sides are smaller than the long sides of the terminal insertion portions 75A and 75B, and intersect the terminal insertion portions 75A and 75B perpendicularly.

  The first metal terminal 83A includes an insertion piece 84a, a connection piece 84b, and a terminal piece 84c. The second metal terminal 83B has an insertion piece 85a, a connection piece 85b, and a terminal piece 85c. The connection pieces 84b and 85b are formed the same as the connection pieces 28b and 29b according to the first embodiment, and the terminal pieces 84c and 85c are formed the same as the terminal pieces 28c and 29c according to the first embodiment. Has been.

  The insertion pieces 84a and 85a are set to sizes corresponding to the terminal insertion portions 75A and 75B, respectively, and are press-fitted into the terminal insertion portions 75A and 75B. The insertion pieces 84a and 85a are provided with fixing portions 87 and 88 exposed to the resin housing portions 76A and 76B. The fixing portions 87 and 88 are through holes that penetrate the insertion pieces 84a and 85a, and are formed in a rectangular shape having the same size as the resin housing portions 76A and 76B. Accordingly, the fixing portions 87 and 88 have a plane (plane that forms a short side) orthogonal to the insertion / removal direction of the metal terminals 83A and 83B.

  When the first metal terminal 83A is press-fitted into the first terminal insertion portion 75A, the fixing portion 87 is opposed to the first resin housing portion 76A and forms the same plane as the inner surface of the resin housing portion 76A. When the second metal terminal 83B is press-fitted into the second terminal insertion portion 75B, the fixing portion 88 is opposed to the second resin housing portion 76B and forms the same plane as the inner surface of the resin housing portion 76B. .

[Effect of the fourth embodiment]
According to the fourth embodiment of the coil component, the same effect as that of the coil component 1 of the first embodiment can be obtained. That is, when overmolding is performed on the internal coil according to the fourth embodiment, the resin member enters the two resin housing portions 76A and 76B. Then, the resin member that has entered the resin accommodating portions 76A and 76B engages with the fixing portions 87 and 88, thereby suppressing the movement of the metal terminals 83A and 83B. As a result, it is possible to prevent stress from being generated at the end portions 14a and 14b (see FIG. 1) of the conductive wire 14 connected to the metal terminals 83A and 83B, and disconnection of the conductive wire 14 (see FIG. 1). Can be suppressed.

  In the fourth embodiment of the coil component, the fixing portions 87 and 88 of the metal terminals 83A and 83B are formed as rectangular (quadrangle) through holes. Then, when the resin member enters the fixing portions 87 and 88, both are engaged. Therefore, the movement of the metal terminals 83A and 83B can be suppressed in all directions orthogonal to the direction in which the central axes of the fixing portions 87 and 88 extend.

[Modification of Embodiment]
The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention. In the first to fourth embodiments, the resin accommodating portion is extended in a direction orthogonal to the insertion / removal direction of the metal terminal. However, as the resin accommodation portion according to the present invention, in the insertion / removal direction of the metal terminal. Alternatively, it may be extended in a direction inclined with respect to it.

  In the first to fourth embodiments, the fixed portion of the metal terminal exposed to the resin accommodating portion forms the same surface as the resin accommodating portion. However, as the fixed portion of the metal terminal according to the present invention, May be formed so as to protrude into the resin container.

  In the first to fourth embodiments, the metal terminal is press-fitted into the terminal insertion portion of the bobbin. However, the metal terminal may be inserted without being press-fitted into the terminal insertion portion. Also in this case, since the movement of the metal terminal is suppressed by the resin member that has entered the resin housing portion, disconnection of the conductive wire can be suppressed.

It is a perspective view of the state which removed the resin member from the structure of 1st Embodiment of the coil components of this invention. It is a disassembled perspective view which shows the bobbin and metal terminal which concern on 1st Embodiment of the coil components of this invention. It is sectional drawing of the AA line part shown in FIG. It is a longitudinal cross-sectional view of 1st Embodiment of the coil components of this invention. FIG. 3 is an exploded perspective view illustrating a bobbin and a metal terminal, illustrating a second embodiment of the coil component of the present invention. FIG. 7 is an exploded perspective view illustrating a bobbin and a metal terminal, illustrating a third embodiment of a coil component according to the present invention. FIG. 9 is an exploded perspective view illustrating a bobbin and a metal terminal, illustrating a fourth embodiment of a coil component according to the present invention. It is explanatory drawing which shows the conventional coil components.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Coil component, 2 ... Internal coil, 3 ... Resin member, 12 ... Bobbin, 13A ... 1st metal terminal, 13B ... 2nd metal terminal, 14 ... Conductive wire, 16 ... Winding coil, 21 ... Terminal attachment Part, 22A ... 1st terminal insertion part, 22B ... 2nd terminal insertion part, 23 ... Resin accommodating part, 31, 32 ... Fixing part

Claims (3)

A bobbin having a terminal insertion portion and a resin accommodating portion communicating with the terminal insertion portion;
A metal terminal inserted into the terminal insertion portion and having a fixing portion exposed to the resin accommodating portion;
A conductive wire wound around the bobbin to form a winding coil, and an end connected to the metal terminal;
A resin member that is integrally formed with the bobbin by overmolding, and that enters the resin accommodating portion of the bobbin and engages with the fixing portion of the metal terminal, thereby suppressing the movement of the metal terminal. Coil parts characterized by that. The coil component according to claim 1, wherein the resin accommodating portion is a through hole formed in a direction substantially perpendicular to the insertion / removal direction of the metal terminal. The coil component according to claim 2, wherein the fixing portion of the metal terminal has a plane perpendicular to the insertion / removal direction of the metal terminal.

Images