JPH1069930A - Metallic electrode terminal and surface-mounted part support member using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metallic electrode terminal which can carry a current of 3A or more, on which a wire as thick as 0.4 to 0.6mm in diameter is wound while it takes a surface- mounted configuration and to provide a surface-mounted part support member that uses the terminal. SOLUTION: A metallic electrode terminal (a) comprises a rectangular or round planar part 2 integrated with a shank 1 that is either rectangular with one side 0.5 to 0.6mm or round with a diameter of 0.5 to 0.6mm, in such a way that the planar part 2 is at right angles to the axis of the shank 1, the cross-sectional area of the planar part 2 being greater than that of the shank 1. A surface-mounted part support member, such as a case 4, a bobbin, or a pinned base, meets the following requirements as to its relation with the electrode terminal (a) driven into a fitting hole 9 in a driving surface 6: the projecting height (h) of the lower surface 11 of the electrode terminal (a) from the lower surface 10 of a support part 8 is not less than - 1mm to not more than 0.5mm; a working space (s) between a wall surface 12 adjacent and perpendicular to the driving surface 6 of the support part 8 and the peripheral surface 13 of the planar part of the electrode terminal (a) driven into the fitting hole 9 in the driving surface 6 is not less than 0.5 mm to not more than 2mm; a wire winding part 1 from the driving surface 6 to the upper surface 14 of the planar part 2 of the electrode terminal (a) driven into the fitting hole 9 is not less than 0.5mm to not more than 1.5mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal electrode terminal used for a surface mounting component such as a transformer and a coil for surface mounting, and a support member for the surface mounting component using the terminal.

[0002]

2. Description of the Related Art In the electronics industry, all electronic components have been miniaturized with the advancement of IC technology, and mounting technology has been progressing to surface mounting. Under such a trend, various measures have been taken for transformers and coils that can be used by passing a relatively large current of 3 A or more, but they have not yet been simple, small, and inexpensively surface-mounted. Transformers and coils using printed circuit boards have been put into practical use, but equipment investment for production is large, it is difficult to manufacture at low cost, and coil patterns are limited by equipment, so equipment is added for each required specification There are difficulties to do. In addition, laminated and sintered type coils and transformers, which have spread rapidly recently, are not suitable for conducting large currents due to their structure. Is becoming the center. Next, take a look at the winding type surface mount coils and transformers.The structure is such that an electrode frame is formed and the terminal of the coil wound around the connection part is soldered or electrically welded. Then, resin molding including a part of the electrode frame is performed, and then the frame protruding outside is cut and bent to form a connection electrode with the substrate. An electrode frame is formed, and a coil housing is formed by resin molding including a part of the electrode frame. A terminal of the wound coil housed in the housing is wound around a connection portion of the frame left inside the housing. After soldering, or electric welding, filling the open portion of the storage portion with resin, or covering with a lid, the frame that protrudes outside is cut and bent to form electrodes. After forming the electrode frame, resin molding including one part of the electrode frame to form a housing part for the coil, and cutting and bending the frame that protrudes outside to form the electrode, The end of the wound coil housed in the housing is wound and soldered, and after connection, the open part of the housing is filled with resin, covered, or opened as it is to obtain a finished product. After forming the electrode frame, forming a housing part of the coil by resin molding including one part of the electrode frame, cutting and bending the frame that protrudes outside to form the electrode, Wrap the end of the wound coil housed in the storage part around the opposite external connection part and solder it. After connecting, fill the open part of the storage part with resin, cover it, or leave it open as it is And finished product
Although the above-mentioned technology has played a certain role in downsizing, it cannot be applied to a large current specification in which a current of 3 A or more is supplied due to the following disadvantages. (1) Since the metal plate used for the electrode is thin (about 0.25 mm) and has insufficient strength and is easily deformed due to the structure that is bent after resin molding, a thick wire exceeding φ0.4 mm is wound. I can't do that. (2) From the above (1), since the DC resistance is necessarily higher than the desired characteristic value, when trying to supply a desired current (3 A or more), the heat generated at the time of conduction is reduced to a value within a practical range (30 to 30 A). 40 ℃)
Can not be suppressed. (3) When winding a thick wire such as φ0.4 to φ0.6, the thickness of the electrode needs to be about the same as the diameter of the wire. It is necessary to increase the wall thickness, and the area performance and the volume performance with respect to the characteristics are deteriorated, so that the surface mounting component becomes unnecessarily large.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above,
An object of the present invention is to provide a metal electrode terminal capable of conducting a current of 3 A or more by winding a thick wire of φ0.4 to φ0.6 while taking a form of surface mounting, and a support member for a surface mounting component using the terminal.

[0004]

According to a first aspect of the present invention, there is provided a metal electrode terminal having a shaft portion having a required shape and a plane portion having a required contour perpendicular to the shaft portion. The cross-sectional area of the plane portion is larger than the cross-sectional area of the shaft portion.

A metal electrode terminal according to a second aspect of the present invention is the metal electrode terminal according to the first aspect of the present invention, wherein the shaft portion and the flat portion have a flat contour T shape punched out of a metal plate, and the shaft portion has a cut in the flat portion. In the notch, the flat portion is formed to be bent perpendicularly to the shaft portion.

The support member for a surface-mounted component using the metal electrode terminal according to the third invention is a support member for a surface-mounted component, wherein the support member is driven into the driving surface of the support member with respect to the lower surface of the support portion. The projection height of the lower surface of the metal electrode terminal of the second invention is not less than -1 mm and not more than 0.5 mm.

According to a fourth aspect of the present invention, there is provided a surface mount component supporting member using a metal electrode terminal.
3. The metal electrode terminal according to claim 1 or 2, wherein the wall surface of the supporting member of the supporting member is perpendicular to the driving surface of the supporting portion and the peripheral surface of the metal electrode terminal is at least 0.5 mm and no more than 2 mm. Includes a working space.

According to a fifth aspect of the present invention, there is provided a support member for a surface-mounted component using a metal electrode terminal, wherein the support member for a surface-mounted component is the first invention or the second aspect, which is driven from the driving surface of the electrode terminal to the driving surface. The feature of the present invention is that the winding portion of the wire up to the upper surface of the flat portion of the metal electrode terminal is in a range of 0.5 mm or more and 1.5 mm or less.

The supporting member for a surface-mounted component using the metal electrode terminal of the sixth invention is the third, fourth or fifth invention, wherein the supporting member comprises a case.

The support member for a surface-mounted component using the metal electrode terminal of the seventh invention is the support member according to the third invention, the fourth invention or the fifth invention, wherein the support member comprises a bobbin.

An eighth aspect of the present invention provides the support member for a surface mount component using the metal electrode terminal according to the third, fourth or fifth aspect of the present invention, wherein the support member comprises a base with pins.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The shaft of a metal electrode terminal according to the present invention has a square shape with a side of 0.5 mm to 0.6 mm or a diameter of 0.5 mm.
A round shape of .about.0.6 mm is selected, and the flat portion is selectively combined with a square or round shape having a cross-sectional area larger than that of the shaft portion for each shape of the shaft portion.

The support member for the surface mount component in the present invention is a bobbin such as a transformer bobbin or a coil bobbin or a case having a base with a pin having a core adhered to the base or a housing space for the coil.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described by way of an embodiment. A metal electrode terminal (hereinafter simply referred to as an electrode terminal) a shown in FIG. 1A is a square shaft having a side of 0.5 mm to 0.6 mm. A rectangular (square) flat portion 2 whose cross-sectional area is larger than the cross-sectional area of the shaft portion 1 at right angles to the axis with respect to the portion 1 is integrally joined, and is shown in FIG. The electrode terminal a has a diameter of 0.5 mm
A rectangular flat portion 2 having a cross-sectional area larger than the cross-sectional area of the shaft portion 1 is formed at a right angle to the axial center with respect to a round (circular) shaft portion 1 of about 0.6 mm. The electrode terminal a shown in FIG. 1 (C) has a cross-sectional area that is perpendicular to the axis of the round (circular) shaft 1 having a diameter of 0.5 mm to 0.6 mm and is larger than the cross-sectional area of the shaft 1. It is formed by integrally joining the enlarged round flat portions 2.

The electrode terminal b shown in FIG. 2 is formed by punching a shaft portion 1 and a plane portion 2 from a phosphor bronze plate having a thickness of 0.5 mm into a plane profile T as shown in FIG. , Shaft part 1
The flat part 2 is formed by bending the flat part 2 orthogonally to the shaft part 1 as shown in FIG.

Next, a description will be given of a support member for a surface mount component using the electrode terminal a in the case where the support member is a case 4 shown in FIG. Opened, four corners of the open surface are formed in a triangular prism structure 7 whose upper surface is a driving surface 6 into which the electrode terminal a is driven. At the same time, a fitting hole 9 into which the electrode terminal a is to be driven is formed in a recess on the diagonal line of the driving surface 6 and is formed by resin. The relationship between the electrode terminal a driven into the fitting hole 9 and the case 4 is shown in FIG. 4
As shown in FIG.
The lower surface (the lower surface of the plane portion 2) 11 has a protrusion height h of -1 mm or more and 0.5 mm or less, and -1 mm means that the support portion 8 is fitted into a hole formed in a base (not shown). The lower surface 11 of the flat portion 2 is retracted from the lower surface 10 of the support portion 8, indicating a limit at that time. In addition, there is a gap between the wall surface 12 adjacent to the driving surface 6 of the support portion 8 at right angles to the plane portion peripheral surface 13 of the electrode terminal a to be driven into the fitting hole 9 of the driving surface 6.
A work space s of 5 mm or more and 2 mm or less is provided, and a wire winding portion 1 from the driving surface 6 to the upper surface 14 of the flat portion 2 of the electrode terminal a driven into the fitting hole 9 has a length of 0.5 mm to 1.5 m.
It is set in the range up to m. As shown in FIG. 6, the supporting member composed of the case 4 has a core 15 having a core size (outside dimension) of 7 mm in length, 5 mm in width, and 3.5 mm in height.
And a coil 16 made of enamel wire having a diameter of 0.45 mm (maximum 0.5 mm) and wound seven turns on one side, and a coil housing 5
Then, each lead portion 18 is wound around and fixed to the winding portion 1 of the electrode terminal a which is driven into each of the four corners, and then the lead portion 18 and the electrode terminal a are joined by solder, and used as a surface mount component. And a DC resistance of 9.5 mΩ, and a heat generation of 40 ° C. or less can be realized at a current of 3.5 A. Characteristic value is a 1000KH _Z, 12μH at 1 mA.

The external dimensions of the finished product including the case 4 are 9 mm in length, 8 mm in width, and 6.5 mm in height, and the area ratio of the coil to the installation area is 59%. Is more advantageous than 53%. Also,
Considering the characteristics, when a ring core is used, the core size is an outer diameter of 7.25 and theoretically a diameter of about 6 is possible, but from the manufacturing perspective, an outer diameter of about 7.25 is required. Since at least 10 mm in length and 10 mm in width are required, the advantage of the present invention is recognized from that point as well.

The support member shown in FIGS.
The supporting member shown in FIG.
However, in the case of the bobbin 19 and the base 20 with pins, the protruding height h is not less than -1 mm and not more than 0.5 mm, the working space s is not less than 0.5 mm and not more than 2 mm, and the winding portion l is 0.5 mm or more and 1.5 mm or less.

[0019]

As described above, according to the metal electrode terminal of the present invention, the wire wound around the shaft portion does not come off, the connection resistance with the base is reduced, and if the shaft portion is square, When winding the wire of the coil lead, there is no loosening due to springback, which contributes to the simplification and efficiency of the work, the securing of a certain quality, and the surface mounting component using the metal electrode terminal of the present invention. According to the supporting member, a large wire having a diameter of 0.4 mm to 0.6 mm can be wound to provide a small-sized, large-current surface-mountable coil component required by the market.
A low resistance of about mΩ or less can be realized, and as a result,
Heat generation at the time of energization of 3A or more is a practical value (30 ° C to 40 ° C).
° C), which has the effect of contributing to ensuring safety.

[Brief description of the drawings]

FIG. 1 is a perspective view of a metal electrode terminal a according to the present invention.

FIG. 2 is a perspective view of a metal electrode terminal b according to the present invention.

FIG. 3 is a perspective view of a punched state in a manufacturing process of the metal electrode terminal b.

FIG. 4 is an explanatory view showing a positional relationship of a metal electrode terminal a on a support member.

FIG. 5 is a perspective view of a support member including a case 4.

FIG. 6 shows a coil 1 housed in a coil housing part 5 of a case 4.
7 is a perspective view of FIG.

FIG. 7 is a perspective view of a support member including a bobbin 19.

FIG. 8 is a perspective view of a support member including a bobbin 19.

FIG. 9 is a perspective view of a support member including a base 20 with pins.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaft part 2 Plane part 3 Notch 4 Case 5 Coil housing part 6 Driving surface 7 Triangular prism structure 8 Support part 9 Insertion hole 10 Lower surface 11 Lower surface 12 Wall surface 13 Flat peripheral surface 14 Upper surface 15 Core 16 Wire 17 Coil 18 Lead portion 19 Bobbin 20 Base with pin h Projection height s Work space l Winding area a Metal electrode terminal b Metal electrode terminal

Claims (8)

[Claims] 1. A metal electrode terminal, comprising: a shaft having a required shape; and a flat portion having a required profile which is integrally perpendicular to the shaft. The cross-sectional area of the flat portion is smaller than the cross-sectional area of the shaft. Large metal electrode terminals. 2. A shank portion and a flat portion having a flat contour T shape stamped from a metal plate and having a cut in the flat portion of the shank portion, wherein the flat portion is orthogonal to the shank portion. 2. The metal electrode terminal according to claim 1, wherein the metal electrode terminal is formed by bending. 3. The supporting member for a surface-mounted component, wherein the projecting height of the lower surface of the metal electrode terminal according to claim 1 or 2 which is driven into a driving surface of the supporting member with respect to the lower surface of the supporting portion is-. A support member for a surface mount component using a metal electrode terminal, which is not less than 1 mm and not more than 0.5 mm. 4. The metal electrode terminal according to claim 1, wherein in the supporting member of the surface mount component, a wall surface is perpendicularly adjacent to a driving surface of the supporting portion of the supporting member, and the metal electrode terminal is driven into the driving surface. A metal electrode terminal having a working space of 0.5 mm or more and 2 mm or less between the peripheral surfaces of the flat part and a supporting member for a surface mount component using the terminal. 5. A wire winding from a driving surface of an electrode terminal to an upper surface of a flat portion of a metal electrode terminal according to claim 1, wherein the supporting member of the surface mount component is driven from the driving surface of the electrode terminal. A support member for a surface mount component using a metal electrode terminal, wherein an attachment portion has a range of 0.5 mm or more and 1.5 mm or less. 6. The support member according to claim 3, wherein the support member comprises a case.
Or a support member for a surface-mounted component using the metal electrode terminal according to 5. 7. The support member according to claim 3, wherein the support member comprises a bobbin.
Or a support member for a surface-mounted component using the metal electrode terminal according to 5. 8. A support member for a surface-mounted component using a metal electrode terminal according to claim 3, wherein the support member comprises a base with pins.