JP2005327887A - Inductor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inductor for improving the bonding strength of terminal members, and for realizing thinning. <P>SOLUTION: This inductor is provided with a drum-type core 20, having a spool section 24 around which a coil 30 is wounded; a case body 40 having an extended section 47, extended from the outer peripheral face of a case to the outside for covering the spool 24; a winding terminal 54 positioned so as to be overlapped with the extended section 47 for winding a terminal 31 of a coil 30 to be wound around the drum-type core 20; and a terminal member 50, having plane terminal 51 positioned on the terminal face of the case body 40. In this case, the terminal 31 of the coil 30 is wound by the both extended section 47 and the winding terminal 54. Also, the terminal member 50 is formed with a reinforcement mounting section 53 for making the mounting status on the outer peripheral face of the case stabilized. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an inductor applied for driving a backlight of a liquid crystal screen of a portable terminal.

  Conventionally, there is a surface mount type inductor having a configuration in which a winding is wound around a winding shaft of a drum type core, and a flat type terminal (plane terminal) is attached to one flange portion of the drum type core. As this type of inductor, configurations disclosed in Patent Documents 1 to 3 exist. Among these, Patent Document 1 and Patent Document 2 disclose a configuration of an inductor in which impact reliability with respect to an external impact is improved by expanding the area of the lower end portion of the drum-type core among the terminals. Furthermore, Patent Document 3 discloses a configuration of an inductor in which an area on the lower collar side of the drum core is increased, a non-plated portion is provided on the bonding surface of the terminal, and the base is sandwiched. .

JP 2001-338818 A (see paragraph number 0041, FIGS. 2 to 6) Japanese Unexamined Patent Publication No. 2003-109823 (see paragraph number 0036, FIGS. 2 to 6) JP 2002-231533 A (see paragraph number 0030, FIG. 1 and FIG. 2)

  By the way, the inductor built in the portable terminal is required to be thin and have high drop strength because of the characteristics of the portable terminal. In order to meet these demands, a drum-type core that can be reduced in size in the height direction is used for mobile terminals, and many inductors that are directly surface-mounted on the board are used. ing.

  Here, in an inductor using a drum-type core, it is said that the tangled terminal that ties the winding terminal breaks or bends during manufacturing or when it receives an impact caused by dropping or the like. Problems arise. That is, in a surface-mount type inductor, in order to suppress the dimension in the height direction, generally the binding terminal is protruded radially outward. In such a configuration, a jig or hand may collide with the binding terminal during assembly work or the like, and the binding terminal may be broken.

  Therefore, it is preferable that the binding terminal is not protruded as much as possible. In that case, the terminal member generally tends to have a complicated shape in order to achieve both the prevention of the protrusion and the securing of adhesive strength. In particular, in the configurations disclosed in Patent Documents 1 and 2, the terminal member has a complicated shape that is bent toward the inner peripheral surface side of the ring core. In order to form such a shape, it is necessary to perform a bending process in accordance with the shape of the ring core, and there is a problem that the man-hour is increased and the cost is increased accordingly.

  Further, in the configuration disclosed in Patent Document 3, the shape of the terminal member is complicated, and the drum-type core is placed / bonded to the base. For this reason, there is a problem that it is difficult to reduce the thickness of the inductor by the thickness of the base.

  The present invention has been made based on the above circumstances, and an object of the present invention is to provide an inductor capable of improving the adhesive strength of a terminal member and reducing the thickness.

  In order to solve the above problems, the present invention includes a drum core having a winding frame portion around which a winding is wound, an extending portion extending outward from the outer peripheral surface of the case, and the winding frame portion. A terminal member having a case body to cover, a binding terminal provided at a position overlapping with the extending portion, and a flat terminal located on an end surface of the case body, and a terminal of the winding wound around the drum core The end of the winding is entangled with both the extension part and the tying terminal, and the terminal member is provided with a reinforcing attachment part for stabilizing the attachment state on the outer peripheral surface of the case. That's what it meant.

  When comprised in this way, since the terminal of a coil | winding is entangled with both an extension part and a binding terminal, the terminal of a coil | winding does not contact at an acute angle with respect to a binding terminal. Therefore, a large stress is not applied to the end of the winding, and it is possible to prevent the occurrence of problems such as disconnection. Further, the presence of the reinforcing attachment portion can increase the attachment strength of the terminal member to the case body. For this reason, it is possible to increase the attachment strength and the like while reducing the thickness of the inductor, and to reduce the occurrence of breakage in the inductor.

  In addition to the above-described invention, in another invention, the binding terminal and the reinforcing mounting portion are provided integrally with the outer peripheral terminal portion that is bent from the flat terminal and extends along the outer peripheral surface of the case body. Is. When comprised in this way, compared with the case where a binding terminal and a reinforcement attaching part are separate bodies, it can improve in strength. Further, the number of man-hours for assembling the inductor can be reduced.

  Furthermore, in addition to the above-mentioned inventions, in another invention, the case body has a planar shape formed in a polygonal shape, and the extending portion protrudes from one case outer peripheral surface forming the polygonal shape. The outer peripheral terminal portion is positioned on the outer peripheral surface of one case, and is positioned on the first outer peripheral terminal portion from which the binding terminal protrudes and the outer peripheral surface of the other case adjacent to the outer peripheral surface of one case, and is reinforced. A second outer peripheral terminal portion from which the attachment portion protrudes.

  When comprised in this way, a reinforcement attachment part becomes a structure which protrudes from the 2nd outer periphery terminal part which makes a predetermined angle with respect to the 1st outer periphery terminal part in which a binding terminal exists. If it does in this way, it will become the composition by which a reinforcement attaching part is located on both sides on both sides of a binding terminal. For this reason, even when a moment is applied to the terminal member in a direction in which the flat terminal is lifted, it is possible to suppress the flat terminal from being lifted against the moment. In particular, if there is a gap between the extension part and the binding terminal and the ends of the windings are tied to each other, the terminal member rotates in a direction that eliminates the gap due to the tension of the windings, and the flat terminal However, it is possible to suppress such lifting by providing a reinforcing mounting portion on the second outer peripheral terminal portion having a predetermined angle.

  According to another invention, in addition to the above-described inventions, a mounting recess for mounting the outer peripheral terminal portion and the reinforcing mounting portion is provided on the outer peripheral surface of the case body. When comprised in this way, even when an outer periphery terminal part is attached to the case outer peripheral surface of a case body, the dimension which this outer periphery terminal part protrudes to the outward of a case body can be reduced. Therefore, it is possible to suppress an increase in the dimension in the width direction of the inductor.

  Further, according to another invention, in addition to each of the above-described inventions, the reinforcing mounting portion has a tapered shape in which a length dimension protruding from the second outer peripheral terminal portion increases as the distance from the first outer peripheral terminal portion increases. It is what you have. When configured in this manner, the length dimension of the reinforcing mounting portion increases as the length dimension away from the first outer peripheral terminal portion increases. Therefore, the attachment strength of the terminal member with respect to the case outer peripheral surface of the case body can be further improved. In addition, the binding terminal and the reinforcing mounting portion do not interfere with each other while securing the mounting strength.

  In another invention, in addition to the above-described inventions, the reinforcing mounting portion has a triangular outer appearance. When comprised in this way, the attachment area with respect to a case body can increase by this triangular reinforcement attachment part, and attachment strength can be improved. Moreover, since the triangular top part side contacts the outer peripheral surface of the case, it is possible to suppress the terminal member from rotating in the direction in which the flat terminal is lifted.

  Furthermore, in another invention, in addition to each of the above-described inventions, the reinforcing mounting portion is formed in a rectangular shape in appearance. When comprised in this way, the attachment area with respect to a case body increases by a rectangular reinforcement attachment part, and attachment strength can be improved. Further, since the rectangular protruding side comes into contact with the outer peripheral surface of the case, it is possible to suppress the terminal member from rotating in the direction in which the flat terminal is lifted.

  Further, another invention relates to a drum core having a winding frame portion around which a winding is wound, a case body covering the winding frame portion, and an entanglement that winds a terminal of the winding wound around the drum core. And a terminal member having a flat terminal located on the end surface of the case body, and the terminal member is provided with a reinforcing attachment portion for reinforcing attachment on the outer peripheral surface of the case.

  When comprised in this way, it becomes possible to raise the attachment intensity | strength with respect to the case body of a terminal member by presence of a reinforcement attachment part. For this reason, it is possible to increase the attachment strength and the like while reducing the thickness of the inductor, and to reduce the occurrence of breakage in the inductor.

  According to the present invention, the adhesive strength of the terminal member can be improved. In addition, the inductor can be thinned.

  Hereinafter, an inductor according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a configuration of an inductor 10 according to an embodiment of the present invention, and is a view showing a state where a side where a terminal member 50 is not provided is turned upward. FIG. 2 is also a perspective view showing the configuration of the inductor 10, and is a perspective view showing a state in which the side on which the terminal member 50 is provided is turned upward. Further, FIG. 3 is a plan view showing the configuration of the inductor 10 and is a view seen from the side where the terminal member 50 is not provided.

  FIG. 4 is also a plan view showing the configuration of the inductor 10, and shows a state viewed from the side where the terminal member 50 is provided. Further, FIG. 5 is a side sectional view showing the configuration of the inductor 10 cut along the direction of arrow A in FIG. 6 is a front view of the inductor 10 as viewed from the direction of arrow A in FIG. 1, and FIG. 7 is a side view of the inductor 10 as viewed from the direction of arrow B in FIG.

  In the following description, the upper side (upper end side) refers to the side on which the upper flange portion 22 (described later) exists, and the lower side (lower end side) refers to the side on which the lower flange portion 23 (described later) exists. Shall point to. 1 to 4 and 7, the winding 30 to be described later is not shown, but the winding 30 (extension) is provided on the winding frame portion 24, the extension portion 47, and the binding terminal 54. In the part 47 and the binding terminal 54, the terminal 31) of the winding 30 is present.

  As shown in FIGS. 1, 2, 5, etc., the inductor 10 is a surface-mount type inductor, a drum-type core 20, a copper winding 30 (see FIG. 5), and a non-conductive member case. It has a body 40 and a terminal member 50.

  The drum core 20 is made of a magnetic material such as a nickel-based ferrite core. However, the material of the drum core 20 is not limited to a ferrite core, and may be other magnetic materials such as permalloy. The drum core 20 is disposed inside the case body 40. As shown in FIG. 5, the drum core 20 includes a winding shaft 21, and an upper flange portion 22 and a lower flange portion 23 that are formed at both ends of the winding shaft 21 in the vertical direction. In the present embodiment, the outer diameter of the upper flange portion 22 is slightly larger than the outer diameter of the lower flange portion 23. However, the outer diameter of the upper flange portion 22 may be substantially the same as the outer diameter of the lower flange portion 23.

  As shown in FIG. 5, a step portion 23 b is provided on the outer peripheral edge of the lower surface 23 a of the lower flange portion 23. The step portion 23b is a portion that is cut away from the lower surface 23a toward the upper flange portion 22, and is provided over the entire circumferential range of the lower surface 23a. The step portion 23b is fitted with a flange portion 45 described later.

  A winding 30 is wound around the outer periphery of the winding shaft 21. The winding 30 is made of a fine wire having a cross-sectional diameter of about 0.035 mm. In the following description, a portion surrounded by the winding shaft 21, the upper flange portion 22, and the lower flange portion 23 is referred to as a winding frame portion 24.

  As shown in FIGS. 1 to 7, a case body 40 made of a non-conductive member such as a resin is provided on the outer peripheral side of the drum core 20. The case body 40 is disposed outside the drum core 20 so as to cover the outer peripheral side of the winding 30 and the outer periphery of the lower flange portion 23. The case body 40 is a member having a substantially ring shape in appearance, similar to the drum core 20 described above. For this reason, the case body 40 is provided with a hole 41 constituting the ring shape at the center thereof. The drum core 20 is fitted into the hole 41 from the lower flange portion 23 side.

  Here, as shown in FIG. 3 and FIG. 4, the case body 40 is not a circular ring shape, but three tops of the four tops of the square are cut out so as to be parallel to the diagonal of the square. (Hereinafter, this cutout portion is referred to as a case outer peripheral small surface 42), and one top portion is formed to draw an arc (hereinafter, this arc portion is referred to as an arc surface 43). Further, of the three case outer peripheral small surfaces 42, the case outer peripheral small surface 42 a facing the arc surface 43 has a smaller area than the other two case outer peripheral small surfaces 42 b and 42 c adjacent to the arc surface 43. Is provided.

  Moreover, in the following description, among the case outer peripheral surfaces of the case body 40, case outer peripheral surfaces having a larger area than the case outer peripheral small surfaces 42a to 42c are referred to as case outer peripheral large surfaces 44a to 44d. In addition, the case outer peripheral small surface 42 and the case outer peripheral large surface 44 correspond to the case outer peripheral surface.

  Further, on the lower end side of the hole portion 41, a flange portion 45 is provided that protrudes over the entire circumference in the direction of narrowing the inner diameter of the hole portion 41. The step portion 23b described above is fitted to the flange portion 45 (see FIG. 5). With this fitting, the drum core 20 is positioned with respect to the case body 40 in the downward direction in FIG. In the present embodiment, the lower surface 40 a of the case body 40 protrudes downward from the lower surface 23 a of the drum core 20.

  An attachment recess 46 is provided on the lower surface side of the case body 40. The mounting recess 46 is provided across the lower side of the case outer peripheral surface of the case body 40 and the lower surface 40a. In addition, the mounting recess 46 is formed below the outer peripheral surface of the case, the entire case outer peripheral surface 42b, an area smaller than half of the case outer peripheral large surfaces 44a and 44d, the entire case outer peripheral surface 42c, and the case outer peripheral surface. It is provided over an area smaller than half of the surfaces 44b and 44c. A terminal member 50, which will be described later, is located in the mounting recess 46 and is attached by bonding. With this attachment, although the terminal member 50 protrudes downward from the lower surface 23a and the lower surface 40a, the protruding dimension is reduced.

  In the following description, portions of the mounting recess 46 that are present on the case outer peripheral small surfaces 42b and 42c are referred to as mounting recesses 46a. Moreover, the part in which the case outer peripheral large surfaces 44a-44d exist among the attachment recessed parts 46 is set as the attachment recessed part 46b. Furthermore, the part which exists in the lower surface 40a among the attachment recessed parts 46 is set as the attachment recessed part 46c. In the present embodiment, a portion of the mounting recess 46 on the lower surface 40a side (a mounting recess 46c described later) is provided substantially flush with the lower surface 23a of the drum core 20 (see FIG. 5).

  Further, the case body 40 is provided with an extending portion 47 that protrudes radially outward of the case body 40. In the present embodiment, the extending portion 47 protrudes outward from the case outer peripheral small surfaces 42b and 42c. Further, the extending portion 47 is disposed at a position overlapping the binding terminal 54 of the terminal member 50 in the height direction of the drum core 20 (vertical direction in FIG. 5). As shown in FIGS. 2, 4, and 6, the extending portion 47 is wider than the binding terminal 54. That is, the extending portion 47 is formed such that the length in the vertical direction in FIG. 4 is longer than the length of the tangled terminal 54 in the same direction.

  Further, as shown in FIG. 1 and the like, a protruding portion 48 is provided on the upper surface side of the extending portion 47. In the present embodiment, the protrusion 48 is provided so that its cross-sectional shape is a substantially semicircular shape. Due to the presence of the protrusion 48, the terminal 31 of the winding 30 entangled with the extending portion 47 and the binding terminal 54 is positioned.

  In the present embodiment, the lower surface of the extending portion 47 is disposed slightly with respect to the upper surface of the binding terminal 54 (see FIGS. 5 to 7). This gap is provided in consideration of variations in the dimensional accuracy of the non-conductive member, specifically, the case body 40 formed of resin. A structure in which the gap is eliminated and the extending portion 47 is tightly attached to the terminal 54 may be adopted.

  Further, the terminal member 50 is fitted and fixed to the end (the lower end in FIG. 5) of the case body 40 on the side where the flange 45 is formed. The terminal member 50 is a component formed by punching a plate-shaped metal member by pressing.

  The terminal member 50 includes a flat terminal 51, an outer peripheral terminal portion 52, a reinforcing attachment portion 53, and a binding terminal 54. Among these, the flat terminal 51 is a portion whose back surface is an adhesive surface bonded and fixed to the flange 45 of the case body 40. As shown in FIGS. 2 and 4 to 7, the planar terminal 51 is arranged on the lower surface side of the inductor 10, and the planar terminal 51 is connected to the land of the substrate when the inductor 10 is surface-mounted on the substrate (not shown). It becomes a contact part. The planar terminal 51 is electrically connected and fixed to the land of the substrate by reflow soldering.

  In the present embodiment, the planar terminal 51 is formed in an arc shape on the inner peripheral side along the outer peripheral edge of the lower flange portion 23 of the drum core 20. Further, the outer peripheral terminal portion 52 is bent in a state of making approximately 90 degrees from the planar terminal 51. The outer peripheral terminal portion 52 is a portion located in the mounting recess 46 described above. In order to make the fitting into the mounting recess 46 favorable, the height dimension and the circumferential dimension of the outer peripheral terminal portion 52 are formed smaller than the mounting recess 46. The mounting recess 46 straddles the case outer peripheral small surface 42b and the case outer peripheral large surfaces 44a and 44d (the case outer peripheral small surface 42c and the case outer peripheral large surfaces 44b and 44c). It is provided so as to straddle the three surfaces of the surface 42b and the case outer peripheral large surfaces 44a and 44d (the case outer peripheral small surface 42c and the case outer peripheral large surfaces 44b and 44c).

  It should be noted that the bent portions present in the flat terminal 51 and the outer peripheral terminal portion 52 are not round but are slightly rounded (R-shaped). In the following description, a portion of the outer peripheral terminal portion 52 attached to the case outer peripheral small surfaces 42b and 42c is referred to as a first outer peripheral terminal portion 52a, and the case outer peripheral large surface 44a and the case outer peripheral large surface 44d (case A portion attached to the outer peripheral large surface 44c and the case outer peripheral large surface 44b) is referred to as a second outer peripheral terminal portion 52b. The first and second outer peripheral terminal portions 52a and 52b are formed in a radial direction at an angle of about 45 degrees with respect to each other in the circumferential direction. Further, necessary cuts are formed between the first and second outer peripheral terminal portions 52a and 52b in the press working.

  The tip portion (upper portion) of the first outer peripheral terminal portion 52a is further bent outward in the radial direction by approximately 90 degrees. The bent tip portion is parallel to the planar terminal 51 and protrudes outward in the radial direction of the case body 40. A terminal 31 of the winding 30 is entangled with the protruding portion. That is, this protruding portion becomes the binding terminal 54.

  Thus, in the present embodiment, since the binding terminal 54 protrudes outward in the radial direction of the case body 40, the winding operation of the winding 30 with respect to the binding terminal 54 is easy. In particular, since the tangled terminal 54 is provided on the case outer peripheral surfaces 42b and 42c cut out so as to be parallel to the diagonal line of the case body 40 in the case outer peripheral surface, the portion 54 corresponding to the top of the square is provided. It will be in the state where a binding terminal exists. Therefore, the protrusion of the binding terminal 54 can be prevented from getting in the way. Moreover, the increase in the dimension in the height direction does not occur.

  In addition, a reinforcing attachment portion 53 is integrally provided on the second outer peripheral terminal portion 52b. The reinforcing attachment portion 53 is provided so as to be directed upward from the second outer peripheral terminal portion 52b. In the present embodiment, the reinforcing attachment portion 53 has a tapered shape in which the protruding height increases as the distance from the first outer peripheral terminal portion 52a increases (towards the distal end portion on the second outer peripheral terminal portion 52b side). Yes. Further, the reinforcing attachment portion 53 has such a tapered shape, and its external appearance has a substantially right triangle shape.

  The reinforcing mounting portion 53 is for increasing the mounting area of the terminal member 50 with respect to the mounting recess 46b. That is, the mounting area of the terminal member 50 with respect to the mounting recess 46b is increased by the reinforcing mounting portion 53 in addition to the second outer peripheral terminal portion 52b.

  In the present embodiment, the reinforcing mounting portion 53 protrudes upward by a dimension L (see FIG. 6), and this dimension L is approximately the same height as the lower surface of the binding terminal 54. The dimension L may be higher than the upper surface of the binding terminal 54, but may be slightly lower.

  Further, the inner peripheral surface of the case body 40 and the case outer peripheral surface of the upper flange portion 22 are arranged to face each other with a slight gap. Among these gaps, the gaps at the portions where the arc surface 43 and the case outer peripheral surface 42a exist are particularly narrow (see FIGS. 1 and 3). Centering on the narrowed gap, an adhesive is applied to the gap between the inner peripheral surface of the hole 41 and the outer peripheral surface of the case of the upper flange portion 22, and the drum core 20 is attached to the case body 40. To be fixed.

  As shown in FIG. 5, the terminal 31 of the winding 30 wound around the winding shaft 21 of the drum-type core 20 is formed from the outside of both the extending portion 47 and the binding terminal 54 that are arranged in the vertical direction. Wrapped. Here, normally, the terminal 31 of the winding 30 has a structure in which only the binding terminal 54 is wound. For this reason, there is a problem that the terminal 31 constituted by the fine wire contacts the edge portion of the binding terminal 54 and is disconnected due to strong stress.

  However, in the present embodiment, as shown in FIGS. 5 and 6, the terminal 31 is configured to be wound from the outside of both the extending portion 47 and the binding terminal 54. Therefore, the terminal 31 comes into contact with the edge portion E of the binding terminal 54 at an obtuse angle. As a result, no strong pressure is applied to the contact portion of the terminal 31 with the edge portion E, the tension is lowered, and no strong stress is applied. Therefore, in the surface mount type inductor 10 of the present embodiment, problems such as disconnection due to contact of the end 31 of the winding 30 with the edge portion E are unlikely to occur.

  According to the inductor 10 having the above configuration, the contact area of the terminal member 50 with respect to the mounting recess 46b can be increased due to the presence of the reinforcing mounting portion 53. Thereby, the attachment strength of the terminal member 50 with respect to the attachment recessed part 46b (case body 40) can be improved. In particular, as compared with the conventional terminal member 50, the mounting area is increased while preventing the shape from becoming complicated. Therefore, the area where the adhesive is applied (around) can be increased, and the adhesive can be prevented from protruding. Moreover, the adhesive strength of the terminal member 50 can be improved by increasing the application area of the adhesive. Moreover, since the shape is prevented from becoming complicated, it is possible to prevent the cost from increasing.

  Further, the presence of the reinforcing mounting portion 53 protruding upward from the second outer peripheral terminal portion 52b can prevent the flat terminal 51 from being lifted. In particular, when the terminal 31 of the winding 30 is entangled with the extension portion 47 and the binding terminal 54 with a gap between them, the planar terminal 51 and the outer periphery are caused by the tension when the winding 30 is wound. The terminal member 50 rotates in a direction to eliminate the gap with the portion between the terminal portion 52 and the terminal portion 52 as a fulcrum, and the flat terminal 51 tends to rise. However, in the present embodiment, a reinforcing mounting portion 53 that protrudes upward is provided on the second outer peripheral terminal portion 52b that forms approximately 45 degrees with respect to the first outer peripheral terminal portion 52a. For this reason, even if the terminal member 50 tries to rotate, the top side of the reinforcing mounting portion 53 is replaced with the mounting recess 46b to prevent the terminal member 50 from rotating. Thereby, it is possible to prevent the flat terminal 51 from floating from the mounting recess 46c.

  Further, since the shape of the terminal member 50 can be prevented from becoming complicated, the inductor 10 can be further reduced in thickness. At the same time, since the floating of the flat terminal 51 can be surely prevented, the inductor 10 having a specified size can be manufactured, and an increase in the size due to the lifting can be suppressed. This can also contribute to the thinning of the inductor 10. That is, even when a moment is applied to the terminal member 50 due to the presence of the reinforcing mounting portion 53, the moment can be resisted and the mounting state of the terminal member 50 can be further stabilized.

  Moreover, in this Embodiment, the terminal 31 of the coil | winding 30 is entangled with both the extension part 47 and the binding terminal 54, and the terminal 31 does not contact an acute angle with respect to the binding terminal 54. FIG. Therefore, a large stress is not applied to the terminal 31, and it is possible to prevent the terminal 31 from being troubled by disconnection or the like.

  Further, the reinforcing attachment portion 53 is provided integrally with the terminal member 50. For this reason, compared with the case where the reinforcement attaching part 53 is separate, it can improve in strength. Further, the terminal member 50 is provided with a first outer peripheral terminal portion 52a and second outer peripheral terminal portions 52b on both sides of the first outer peripheral terminal portion 52a, of which the second outer peripheral terminal portion 52b is provided. A reinforcing attachment portion 53 protrudes from the terminal portion 52b. Thus, since the reinforcement attachment part 53 becomes a structure which protrudes from the 2nd outer peripheral terminal part 52a, it becomes a structure in which the reinforcement attachment part 53 is located on both sides on both sides of the binding terminal 54.

  Here, the first outer peripheral terminal portion 52a and the second outer peripheral terminal portion 52b form a predetermined angle (approximately 45 degrees). Therefore, the terminal member 50 is adhered to the mounting recess 46 at each of the outer peripheral terminal portions 52a and 52b, and the mounting strength can be further improved.

  An attachment recess 46 is provided on the outer peripheral surface of the case body 40, and the terminal member 46 is located in the attachment recess 46. For this reason, even if the outer peripheral terminal portion 52 of the terminal member 50 is positioned on the case outer peripheral surface of the case body 40, the outer peripheral terminal portion 52 can be prevented from jumping outward. Thereby, an increase in the size of the inductor 10 can be suppressed.

  Further, the reinforcing attachment portion 53 has a tapered shape, and its appearance has a substantially right triangle shape. Moreover, the protruding length of the substantially right triangle shape increases as the distance from the first outer peripheral terminal portion 52a increases. For this reason, the attachment strength of the terminal member 50 to the case outer peripheral surface of the case body 40 can be further improved. Moreover, since the protrusion length of the side away from the 1st outer periphery terminal part 52a is increasing, it can prevent that the binding terminal 54 and the reinforcement attachment part 53 interfere.

  Although one embodiment of the present invention has been described above, the present invention can be variously modified in addition to this. This will be described below.

  In the above-described embodiment, the reinforcing attachment portion 53 formed in a substantially right triangle shape with respect to the second outer peripheral terminal portion 52b is integrally provided. However, the reinforcing attachment portion 53 is not limited to a substantially right triangle shape. For example, as shown in FIG. 8, a configuration in which the substantially rectangular reinforcing attachment portion 60 protrudes from the second outer peripheral terminal portion 52b may be employed. In the configuration shown in FIG. 8, the mounting recess 46b penetrates the case outer peripheral surface 44a in the vertical direction so as to correspond to the reinforcing mounting portion 60 having a large protruding dimension. However, when the strength on the outer peripheral surface side of the case body 40 becomes a problem, a portion that is lower than the upper end surface of the case body 40 by a predetermined distance without adopting a configuration in which the mounting recess 46b penetrates in the vertical direction. It is preferable to be fastened.

  Moreover, as shown in FIG. 9, you may employ | adopt the structure which makes the reinforcement attachment part 61 which makes a part of circular shape protrude from the 2nd outer peripheral terminal part 52b. In addition, various shapes such as a staircase shape and a trapezoidal shape can be employed.

  Further, in the above-described embodiment, the extending portion 47 is provided in the case body 40, and the binding terminal 54 is located in a state of being overlapped with the extending portion 47. However, a configuration in which the extending portion 47 is omitted may be employed.

  Furthermore, in the above-described embodiment, the case where the reinforcing attachment portion 53 is provided in the inductor 10 has been described. However, you may make it provide a reinforcement attachment part in electronic components (a transformer, a filter, etc.) other than an inductor. Further, instead of the case body 40, a ring core made of a magnetic material may be used.

  In the above-described embodiment, the reinforcing attachment portion 53 is formed from the same metal plate as the terminal member 50 and is provided integrally with the terminal member 50. However, the reinforcing mounting portion may be separate from the terminal member 50. For example, the reinforcing attachment portion may be configured by a separate spring-like member and the terminal member 50 may be pressed by the spring-like member.

  The inductor of the present invention can be used in the field of electrical equipment.

It is a perspective view which shows the structure of the inductor which concerns on one embodiment of this invention, and is a figure which shows the state seen from the side in which the terminal member is not provided. FIG. 2 is a perspective view showing a state of the inductor of FIG. 1 as viewed from a side where a terminal member is provided. FIG. 2 is a plan view showing the inductor of FIG. 1 as viewed from the side where no terminal member is provided. FIG. 2 is a plan view showing the inductor of FIG. 1 as viewed from the side where a terminal member is provided. FIG. 2 is a side sectional view showing a state where the inductor of FIG. 1 is cut along a direction indicated by an arrow A. FIG. 2 is a front view of the inductor of FIG. 1 as viewed from the direction of arrow A. FIG. 2 is a side view of the inductor of FIG. 1 as viewed from the direction indicated by an arrow B. It is a perspective view which shows the structure which concerns on the modification of the inductor of this invention, and protruded the substantially rectangular reinforcement attachment part from the 2nd outer peripheral terminal part. It is a perspective view which shows the structure which concerns on the modification of the inductor of this invention, and protruded the reinforcement attachment part which makes a part of circular shape from the 2nd outer peripheral terminal part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Inductor 20 ... Drum type core 21 ... Winding shaft 22 ... Upper flange part 23 ... Lower flange part 24 ... Winding frame part 30 ... Winding 33 ... Terminal 40 ... Case body 41 ... Hole part 42 ... Case outer peripheral small surface 43 ... Arc surface 44 ... Case outer periphery large surface 45 ... Bridge 46 ... Mounting recess 47 ... Extension portion 50 ... Terminal member 51 ... Plane terminal 52a ... First outer periphery terminal portion 52b ... Second outer periphery terminal portion 53 ... Reinforcement attachment portion 54 ... Tying terminal

Claims (8)

A drum core having a winding frame around which the winding is wound;
A case body that has an extending portion that extends outward from the outer peripheral surface of the case and covers the winding frame portion;
A terminal member having a flat terminal located on an end surface of the case body, and a binding terminal provided at a position overlapping with the extending portion while winding an end of the winding wound around the drum core;
Comprising
The end of the winding is entangled with both the extension part and the binding terminal,
The terminal member is provided with a reinforcing mounting portion for reinforcing the mounting on the outer peripheral surface of the case.
An inductor characterized by that.   2. The inductor according to claim 1, wherein the binding terminal and the reinforcing attachment portion are integrally provided with respect to an outer peripheral terminal portion that is bent from the planar terminal and extends along a case outer peripheral surface of the case body. . The case body has a planar shape formed in a polygonal shape,
The extension portion protrudes from the outer peripheral surface of one case having the polygonal shape,
The outer peripheral terminal portion is
A first outer peripheral terminal portion located on the outer peripheral surface of the one case and protruding from the binding terminal;
A second outer peripheral terminal portion that is located on the outer peripheral surface of the other case adjacent to the outer peripheral surface of the one case and from which the reinforcing mounting portion protrudes;
The inductor according to claim 2, further comprising:   The inductor according to claim 2 or 3, wherein an attachment recess for attaching the outer peripheral terminal portion and the reinforcing attachment portion is provided on the outer peripheral surface of the case body.   The length of the reinforcing mounting portion protruding from the second outer peripheral terminal portion has a tapered shape that increases as the distance from the first outer peripheral terminal portion increases. 4. The inductor according to 4.   The inductor according to any one of claims 2 to 5, wherein the reinforcing mounting portion has a triangular appearance.   The inductor according to any one of claims 2 to 4, wherein the external appearance of the reinforcing attachment portion is formed in a rectangular shape. A drum core having a winding frame around which the winding is wound;
A case body covering the above-described winding frame part;
A binding member for binding a terminal of a winding wound around the drum core, and a terminal member having a flat terminal located on an end surface of the case body;
Comprising
The terminal member is provided with a reinforcing mounting portion for reinforcing the mounting on the outer peripheral surface of the case.
An inductor characterized by that.

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