JP2014229723A - Fixing structure of mounting terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing structure of a mounting terminal which enables a mounting terminal to be reliably fixed to a base plate of a wound component corresponding to surface mounting.SOLUTION: In this fixing structure of a flat plate-like mounting terminal 2 fixed to a base plate 1 provided on the mounting surface 1a side of a wound component 6, a through hole 3 is formed in the vicinity of the periphery of the base plate 1, a columnar protrusion 4 inserted in the through hole 3 is provided on the surface of one end part side in the mounting terminal 2, a hole part 5 is bored on the other end part side, and the protrusion 4 is inserted form the mounting surface 1a side of the through hole 3 of the base plate 1. The mounting terminal is brought into contact with the front and back sides of the mounting surface 1a and the non-mounting surface 1b and bent in a U-shape, the end part 4a of the protrusion 4 protruding from the through hole 3 is inserted in the hole part 5 at the other end part, the diameter of the end part 4a is expanded, and the mounting terminal is thereby fixed to the base plate 1.

Description

  The present invention relates to a mounting structure for mounting terminals of winding components corresponding to surface mounting used for power chokes, noise filters, and the like.

  In recent years, due to the miniaturization of winding components, surface mounting that is directly mounted on a substrate has become mainstream. Thereby, the base plate for attaching a mounting terminal is provided in winding components. In order to attach the mounting terminals to the base plate, there is a method of fitting clip-shaped mounting terminals 14 into the base plate 13 as shown in FIG.

  Further, as shown in FIG. 7, there is a method in which a mounting terminal 14 made of a metal plate is bent and attached to the base plate 13. In addition, a method of attaching a mounting terminal to the base plate with an adhesive, a method of attaching the mounting terminal to the base plate by insert molding, and the like are common.

  However, these conventional attachment methods are often restricted by the terminal metal material and thickness. For example, in the method in which the clip-shaped mounting terminal 14 is fitted into the base plate 13, the metal material needs to be hard, but since it is mainly made of soft copper, it is easy to come off and needs to be reinforced with an adhesive. . Therefore, there is a problem that the number of manufacturing steps increases.

  In addition, in the method in which the mounting terminal 14 of the metal plate is bent and attached to the base plate 13, since the base plate 13 is small, it is difficult to bend and it is easy to come off, and similarly, reinforcement with an adhesive is required. For this reason, there is a problem that productivity is poor and production man-hours increase.

  The method of attaching the mounting terminal to the base plate with an adhesive has the problems that the number of work steps increases and that it takes time to dry the adhesive. Further, the method of attaching the mounting terminal to the base by insert molding has a problem that the cost increases.

  This invention is made in view of the said situation, and makes it a subject to provide the fixing structure of the mounting terminal which can fix a mounting terminal reliably to the baseplate of the winding components corresponding to surface mounting. .

  In order to solve the above-mentioned problem, the invention according to claim 1 is a flat mounting terminal fixing structure fixed to a base plate provided on the mounting surface side of the winding component, wherein the base plate is located near the outer periphery. A through hole is formed, and the mounting terminal is provided with a columnar protrusion inserted into the through hole on the surface on one end side, and a hole is formed on the other end side. The part is inserted from the mounting surface side of the through hole of the base plate, is abutted on the front and back surfaces of the mounting surface and the non-mounting surface and is bent in a U shape, and the hole portion of the other end portion An end portion of the protruding portion protruding from the through hole is inserted into the base plate, and the end portion is expanded in diameter to be fixed to the base plate.

  According to a second aspect of the present invention, in the fixing structure of the flat mounting terminal fixed to the base plate provided on the mounting surface side of the winding component, the base plate has a through hole in the vicinity of the corner portion. The mounting terminal is provided with a columnar protrusion on the surface on one end side, and the protrusion is inserted from the mounting surface side of the through hole of the base plate and protrudes from the through hole. The end of the protruding portion is fixed to the base plate by expanding the diameter.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the mounting terminal is bent in an L shape along the outer edge of the base plate. It is a feature.

  According to the first aspect of the present invention, the columnar protrusion provided on one end of the surface of the mounting terminal is inserted from the mounting surface side of the through hole formed in the base plate, and the mounting surface is not mounted. The end of the protrusion protruding from the through hole is inserted into the hole of the other end, and the diameter of the end is expanded. By doing so, the base plate and the mounting terminal are fixed, so that the mounting terminal can be fixed in close contact with the mounting surface side and the non-mounting surface side of the base plate, and the flatness on the mounting surface side is improved. Can be made.

  Further, since the mounting terminal is fixed to the base plate by increasing the diameter of the end portion of the protruding portion protruding from the through hole of the base plate, it can be reliably fixed by a simple method, such as an adhesive. There is no need for reinforcement. As a result, the manufacturing cost can be suppressed and workability can be improved.

  According to the second to third aspects of the present invention, the columnar protrusion provided on one end of the surface of the mounting terminal is inserted from the mounting surface side of the through hole formed in the base plate, and the base plate The base plate and the mounting terminal are fixed by expanding the diameter of the end projecting to the non-mounting surface side, so that the mounting terminal can be fixed in close contact with the mounting surface side of the base plate. The flatness on the side can be improved.

  Moreover, since the mounting terminal is fixed to the base plate by expanding the diameter of the end of the protrusion protruding from the through hole of the base plate, it can be securely fixed by a simple method, such as an adhesive. There is no need for reinforcement. As a result, the manufacturing cost can be suppressed and workability can be improved.

  According to the invention described in claim 3, since the other end of the mounting terminal is bent in an L shape along the outer edge of the base plate, the other end of the mounting terminal protrudes from the through hole of the base plate. The movement in the in-plane direction on the mounting surface side of the mounting terminal with the end portion expanded in diameter can be restricted. Thereby, the shift | offset | difference of the said mounting terminal can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a base plate having a mounting terminal fixing structure according to the first embodiment of the present invention, and FIG. It is a perspective view of the coil | winding components which arrange | positioned the base plate of FIG. The mounting terminal fixing method to the base plate in the mounting terminal fixing structure of 1st Embodiment is shown, (a) is sectional drawing which shows the state which inserted the projection part of the mounting terminal in the through-hole of the base plate, (b) is It is sectional drawing which shows the state which bent the other end part side of the mounting terminal in the L shape along the outer end part of the baseplate. The mounting terminal fixing method to the base plate in the mounting terminal fixing structure of 1st Embodiment is shown, (a) bends the other end part side of a mounting terminal along the outer end part of the base plate in the U shape. Sectional drawing which shows the state which penetrated the hole part in the projection part, (b) is sectional drawing which shows the state which expanded the diameter of the edge part of the projection part which protruded from the hole part of the mounting terminal. The 2nd Embodiment which concerns on this invention is shown, (a) is a perspective view of the baseplate by the fixing structure of the mounting terminal, (b) is an expanded view of the mounting terminal. It is a perspective view of the base plate by the conventional fixing structure of a mounting terminal. It is a perspective view of the base plate by the fixing structure of the other conventional mounting terminal.

(Embodiment 1)
1 to 4 show a mounting terminal fixing structure according to a first embodiment of the present invention. Four corners (outer periphery) of a base plate 1 provided on a mounting surface side of a winding component 6 are shown. In addition, each mounting terminal 2 is fixed and schematically configured.

  Here, as shown in the developed view of FIG. 1B, the mounting terminal 2 is formed in a flat plate shape mainly composed of copper and is formed in an L shape in a plan view. A cylindrical projection 4 is erected at the center of the short side of the base end side (one end side) of the long side portion 2a of the mounting terminal 2 and the tip end side (the other end side). A hole 5 is formed at the center in the short direction. The hole 5 has a hole slightly larger than the diameter of the protrusion 4. Further, a U-shaped recess 9 is formed at the center in the short direction of the tip of the short side 2b of the mounting terminal 2.

  The base plate 1 is made of a synthetic resin such as polypropylene and has a rectangular shape in plan view. Further, the base plate 1 is formed with a recess 7 in which the long side portion 2a of the mounting terminal 2 bent in a U shape is accommodated in the vicinity of the corner portion. The concave portion 7 is formed with a width dimension substantially the same as the width dimension of the long side portion 2 a of the mounting terminal 2 from the corner portion in the longitudinal direction of the non-mounting surface side 1 along the outer edge portion.

  Furthermore, the corners on the mounting surface 1a side cover the entire area of the mounting terminal 2 including the abutting portion on the base end side of the long side 2a of the mounting terminal 2 and the base end side of the short side 2b. A step portion 8 cut to a thickness dimension of is formed. And the through-hole 3 which the cylindrical projection part 4 of the mounting terminal 2 penetrates is formed in the position of the recessed part 7 and the step part 8, respectively. The through hole 3 is formed with a diameter slightly larger than the diameter of the protrusion 4 of the mounting terminal 2.

  The mounting terminal 2 has a projection 4 inserted from the mounting surface 1a side of the through hole 3 of the base plate 1 and a step 8 on the mounting surface 1a side and a recess 7 on the non-mounting surface 1b side. The end of the protrusion 4 protruding from the through hole 3 is inserted into the hole 5 at the other end and abutted on the front and back surfaces, and the diameter of the end is expanded. It is fixed to the base plate 1. Furthermore, the short side 2b of the mounting terminal 2 is bent in an L shape along the outer edge of the base plate 1 in the short direction.

  In addition, the choke coil 10 is wound around the core cover 11 with a ferrite core (not shown) on the non-mounting surface 1b of the base plate to which the mounting terminals 2 are fixed, and the coil 12 is wound in an α winding. Then, both end portions 12a of the coil 12 are U-shaped concave portions formed at the tips of the short side portions 2b of the mounting terminals 2 that are bent in an L shape along the outer edge portions of the base plate 2 in the short direction. 9 is inserted.

  When assembling the mounting terminal fixing structure having the above structure, first, as shown in FIG. 1B, an L-shaped mounting terminal 2 is prepared in plan view. Next, as shown in FIG. 3A, the protrusion 4 of the mounting terminal 2 is inserted into the through hole 3 of the base plate 1 from the mounting surface 1 a side of the base plate 1. At that time, the base end side of each of the long side portion 2a and the short side portion 2b of the mounting terminal 2 formed in an L shape in plan view is brought into contact with the stepped portion 8. As a result, the tip of the protrusion 4 protrudes from the recess 7 on the non-mounting surface 1b side.

  Then, as shown in FIG. 3B, the distal end side of the long side portion 2 a of the mounting terminal 2 is bent in an L shape along the concave portion 7 of the outer edge portion in the longitudinal direction of the base plate 1. Further, as shown in FIG. 4A, the long side portion 2a of the mounting terminal 2 bent in an L shape is extended along the recess on the non-mounting surface 1b side of the base plate 1 along the long side portion. 2a is bent so that it is U-shaped, and the tip of the protrusion 4 of the mounting terminal 2 protruding from the through hole 2 of the base plate 1 is inserted into the hole 5 formed at the tip of the long side 2a. . Thereby, the long side part 2a of the mounting terminal 2 is contact | abutted on the front and back of the mounting surface 1a side of the baseplate 1, and the non-mounting surface 1b side.

  Next, as shown in FIG. 4B, pressure or the like is applied to the end of the protrusion 4 of the mounting terminal 2 protruding from the hole 5 formed at the tip of the long side 2a of the mounting terminal 2. Increase the diameter. Thereby, the mounting terminal 2 is fixed to the base plate 1.

  Furthermore, the front end side of the short side portion 2 b of the mounting terminal 2 is bent in an L shape along the outer edge portion of the base plate 1 in the short direction. Then, the four mounting terminals 2 are fixed in the vicinity of the corners of the base plate 1 by the above procedure, and then the choke coil 10 is disposed on the base plate 1. At that time, as shown in FIG. 2, the four ends 12 a of the coil 12 wound around the core cover 11 of the choke coil 10 are inserted into the U-shaped recess 9 of the short side 2 b of the mounting terminal 2. .

  The end 12a of the coil 12 of the choke coil 10 and the U-shaped recess 9 of the short side 2b of the mounting terminal 2 are fixed by brazing or the like, and the base plate 1 and the core cover 11 of the choke coil 10 are fixed. By bonding and fixing, the winding part is completed.

  According to the mounting terminal fixing structure having the above configuration, the cylindrical projection 4 provided on one end of the surface of the mounting terminal 2 is formed from the mounting surface 1 a side of the through hole 3 formed in the base plate 1. The ends of the protrusions 4 that are inserted and are brought into contact with the front and back surfaces of the mounting surface 1a and the non-mounting surface 1b and bent into a U shape, and project from the through holes 3 into the hole 5 at the other end. In order to fix the base plate 1 and the mounting terminal 2 by inserting the portion 4a and expanding the end 4a, the mounting terminal 2 is brought into close contact with the mounting surface 1a side and the non-mounting surface 1b side of the base plate 1. The flatness on the mounting surface 1a side can be improved.

  Moreover, since the mounting terminal 2 is fixed to the base plate 1 by expanding the diameter of the end 4a of the protrusion 4 protruding from the through hole 3 of the base plate 1, it can be securely fixed by a simple method, and the adhesive No need for reinforcement. As a result, the manufacturing cost can be suppressed and workability can be improved.

(Embodiment 2)
FIG. 5 shows a mounting terminal fixing structure according to the second embodiment of the present invention. The same components as those shown in FIG.
The mounting terminal fixing structure is roughly configured by fixing the mounting terminals 2 in the vicinity of the four corners (outer peripheral portions) of the base plate 1 provided on the mounting surface side of the winding component (not shown). .

  Here, as shown in the developed view of FIG. 5B, the mounting terminal 2 is formed in a flat plate shape mainly made of copper and is formed in an L shape in a plan view. A cylindrical protrusion 4 is erected at the center of the short side portion 2c of the mounting terminal 2 on the base end side (one end side) in the short direction. In addition, a U-shaped recess 9 is formed at the center of the distal end of the long side 2d of the mounting terminal 2 in the short direction.

  The base plate 1 is made of a synthetic resin such as polypropylene and has a rectangular shape in plan view. Further, the base plate 1 is formed with a recess 7 in the outer edge near the corner of the corner, in which the tip of the short side 2c of the mounting terminal 2 bent in an L shape is accommodated. The recess 7 is formed with a width dimension substantially the same as the width dimension of the short side portion 2 c of the mounting terminal 2.

  Further, the entire corner area of the mounting surface 1a, including the short side portion 2c of the mounting terminal 2 and the contact portion on the base end side of the long side portion 2d, is cut to the thickness dimension of the mounting terminal 2. A stepped portion 8 is formed. A through hole 3 through which the cylindrical protrusion 4 of the mounting terminal 2 is inserted is formed at each step 8. The through hole 3 is formed with a diameter slightly larger than the diameter of the protrusion 4 of the mounting terminal 2.

  Then, the mounting terminal 2 has a protruding portion 4 inserted from the mounting surface 1a side of the through hole 3 of the base plate 1 and an end portion of the short side portion 2c in an L shape along the concave portion 7 of the outer edge portion. The end of the protrusion 4 that is bent and protrudes from the through hole 3 is expanded in diameter and fixed to the base plate 1. Further, the long side portion 2 d of the mounting terminal 2 is bent in an L shape along the outer edge portion of the base plate 1 in the short direction.

  Further, a choke coil or the like is disposed on the non-mounting surface 1b of the base plate 1 to which the mounting terminal 2 is fixed, as in the first embodiment. This choke coil is formed at the tip of the long side portion 2a of the mounting terminal 2 in which both ends of the coil wound in the α winding are bent in an L shape along the outer edge portion of the base plate 1 in the short direction. Inserted into the U-shaped recess 9.

  When assembling the mounting terminal fixing structure having the above-described configuration, first, as shown in FIG. 5B, an L-shaped mounting terminal 2 is prepared in plan view. Next, as in the first embodiment, the protrusion 4 of the mounting terminal 2 is inserted into the through hole 3 of the base plate 1 from the mounting surface 1a side of the base plate 1. At that time, the base end side of each of the short side portion 1c and the long side portion 1d of the mounting terminal 2 formed in an L shape in plan view is brought into contact with the stepped portion 8. Thereby, the front-end | tip part of the projection part 4 protrudes from the non-mounting surface 1b side.

  And the front end side of the short side part 2c of the mounting terminal 2 is bent in L shape along the recessed part 7 of the outer edge part of the longitudinal direction of the baseplate 1. FIG. Thereby, the movement of the mounting terminal 2 in the in-plane direction is restricted at the end portion 8 on the mounting surface 1 a side of the base plate 1.

  Next, the end of the protrusion 4 of the mounting terminal 2 protruding from the non-mounting surface 1b of the through hole 3 of the base plate 1 is expanded in diameter by applying pressure or the like. Thereby, the mounting terminal 2 is fixed to the base plate 1.

  Furthermore, the front end side of the long side portion 2 d of the mounting terminal 2 is bent in an L shape along the outer edge portion of the base plate 1 in the short direction. Then, after the four mounting terminals 2 are fixed in the vicinity of the corners of the base plate 1 according to the above procedure, a choke coil is disposed on the base plate 1 in the same manner as the first embodiment value. At that time, the four ends of the coil wound around the core cover of the choke coil are inserted into the U-shaped recess 9 of the long side portion 2 d of the mounting terminal 2.

  And while fixing the said edge part of the said coil of the said choke coil and the U-shaped recessed part 9 of the short side part 2b of the mounting terminal 2 by brazing etc., the base plate 1 and the said core cover of the said choke coil By bonding and fixing, the winding part is completed.

  According to the mounting terminal fixing structure having the above configuration, the cylindrical protrusion 4 formed on the base end side of the short side 2c of the mounting terminal 2 is mounted on the through-hole 3 formed in the base plate 1. The mounting terminal 2 is mounted on the mounting surface of the base plate 1 in order to fix the base plate 1 and the mounting terminal 2 by increasing the diameter of the end portion protruding from the surface 1a side and protruding toward the non-mounting surface 1b side of the base plate 2. It can be fixed in close contact with the 1a side, and the flatness on the mounting surface 1a side can be improved.

  Moreover, since the mounting terminal 2 is fixed to the base plate 1 by expanding the diameter of the end portion of the protruding portion 4 protruding from the through hole 3 of the base plate 1, it can be securely fixed by a simple method, such as an adhesive. There is no need for reinforcement. As a result, the manufacturing cost can be suppressed and workability can be improved.

  And since the long side part 2d of the L-shaped mounting terminal 2 is bent in L shape along the outer edge part of the base plate 1 in planar view, it protrudes from the through-hole 3 of the base plate 1, and the end The movement in the in-plane direction on the mounting surface 1a side of the mounting terminal 2 fixed by expanding the diameter of the portion can be restricted. Thereby, the shift | offset | difference of the mounting terminal 2 can be prevented.

  In addition, in the said embodiment, although demonstrated only when using what formed the projection part 4 standingly arranged in the base end part side of the long side part 2a of the mounting terminal 2 in the cylindrical shape, this invention is limited to this. For example, any columnar shape such as an elliptical cylindrical shape, a polygonal cylindrical shape, a cylindrical shape, an elliptical cylindrical shape, or a polygonal column can be used.

  It can be used for winding parts corresponding to surface mounting used for power chokes and noise filters.

DESCRIPTION OF SYMBOLS 1 Base plate 2 Mounting terminal 3 Through-hole 4 Protrusion part 4a End part 5 Hole part 6 Winding component 7 Recessed part 8 Step part 9 Recessed part 10 Choke coil 11 Core cover 12 Coil

Claims (3)

In the fixed structure of the flat mounting terminals fixed to the base plate provided on the mounting surface side of the winding component,
The base plate has a through hole formed in the vicinity of the outer periphery,
The mounting terminal is provided with a columnar projection inserted into the through hole on the surface on one end side, and a hole is drilled on the other end side, and the projection is formed on the through hole of the base plate. The protrusion that is inserted from the mounting surface side, is in contact with the front and back surfaces of the mounting surface and the non-mounting surface, is bent in a U shape, and protrudes from the through hole to the hole portion of the other end portion A mounting terminal fixing structure, wherein an end portion of the mounting portion is inserted and the end portion is expanded in diameter to be fixed to the base plate. In the fixed structure of the flat mounting terminals fixed to the base plate provided on the mounting surface side of the winding component,
The base plate has a through hole formed in the vicinity of the corner,
The mounting terminal is provided with a columnar protrusion on the surface on one end side, the protrusion is inserted from the mounting surface side of the through hole of the base plate, and the protrusion of the protrusion protruding from the through hole A mounting terminal fixing structure, wherein the end portion is fixed to the base plate by expanding the diameter.   3. The mounting terminal fixing structure according to claim 2, wherein the other end of the mounting terminal is bent in an L shape along an outer edge of the base plate.

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