JP3089873U - Soldering structure of electric parts - Google Patents

Abstract

(57) [Problem] To provide a soldering structure of an electric component that can be soldered with a tool or a device having a small heat capacity with a simple structure without increasing electric resistance. SOLUTION: This is a soldering structure for an electric component such as a coil 13 and has a lead 14 of a metal piece soldered to a predetermined electrode 16, and a tip 11 of the lead 14 of the metal piece.
a and 12a are divided into a plurality. Each of the divided tip portions 11a and 12a has a step-like step extending toward the electrode 16, a random step-like step, or a lead 28.
Is formed in a shape cut at an acute angle.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a soldering structure of an electric component connecting an electric component and an electrode.

[0002]

[Prior art]

 Conventionally, various types of soldering have been performed to connect electric components to electrodes such as circuit boards. For example, as shown in FIG. 9 and FIG. 10, soldering of a coil portion of a transformer as an electric component is performed in the case of a sheet metal coil formed by pressing a plated copper plate or an edgewise coil in which a rectangular electric wire is wound in a coil shape. The lead 2 of the coil 1 is placed in parallel with and in contact with the electrode 3, and in this state, a solder 4 is provided so as to cover the tip of the lead 2 and the electrode 3, and a mechanically and electrically connected soldering structure 5 is provided. Had formed.

In the soldering operation, first, the lead 2 of the coil 1 is placed in parallel with the surface of the electrode 3 along its longitudinal direction, and a soldering iron heated to a predetermined temperature is brought into contact with the lead 2 while heating. The solder 4 is melted, and the lead 2 and the electrode 3 are covered with the melted solder 4.

[0004]

[Problems to be solved by the invention]

 In the case of the above-mentioned conventional technique, it is preferable that the coil 1 and the lead 2, which are the paths through which electricity flows, use a sheet metal as thick as possible to reduce the electric resistance. However, the lead 2 manufactured using a thick sheet metal has a large heat capacity in accordance with its volume, so that when soldering, tools and equipment having a large heat capacity such as a large soldering iron and a reflow furnace are required. Become. On the other hand, in order to reduce the heat capacity of the lead 2, the lead 2 may be made thin and thin. However, if the lead 2 is made thin and thin, there is a contradictory problem that the electric resistance increases.

[0005] Further, as in a soldering structure 6 shown in FIG. 11, a lead 2 is soldered obliquely to the electrode 3. According to the soldering structure 6, since the lead 2 is not overlapped in surface contact with the electrode 3, the amount of heat of the soldering iron transmitted through the lead 2 and escaping to the electrode 16 is small, which is necessary for soldering. Heat capacity can be reduced, making soldering easier. However, there is a problem that the contact area between the lead 2 and the electrode 3 is small, and the electrical resistance at that portion is increased.

The present invention has been made in view of the above-mentioned conventional problems, and has a simple structure and can be soldered with a tool or a device having a small heat capacity without causing an increase in electric resistance. It is an object of the present invention to provide a soldering structure.

[0007]

[Means for Solving the Problems]

 This invention is a soldering structure of an electric component such as a coil having a metal piece soldered to a predetermined electrode, wherein the soldered portion of the metal piece is divided into a plurality of pieces, and Each tip of the metal piece is a soldering structure for an electric component formed on a stepped step extending toward the electrode.

The present invention also relates to a soldering structure for an electric component such as a coil having a metal piece to be soldered to a predetermined electrode, wherein a tip of the metal piece to be soldered is cut at an acute angle. The metal piece is provided in contact with the surface of the electrode in a longitudinal direction in parallel with the surface of the electrode, and the distal end surface is provided facing outward with respect to the electrode surface. It is a soldering structure for electrical components.

The present invention also relates to a soldering structure for an electric component such as a coil having a metal piece to be soldered to a predetermined electrode, wherein the tip of the metal piece to be soldered is formed of the above metal. The metal tip is divided into a plurality of pieces along the longitudinal direction of the piece, and each of the divided tips of the metal piece is a soldering structure for an electric component located at a level different from each other.

The above-mentioned metal piece is a leading end of a coil of a sheet metal formed by pressing a plated copper plate or a coil of a rectangular wire wound in a coil shape. Alternatively, the metal piece is a tip of a lead in which a plurality of metal wires are bundled.

In the soldering structure for an electric component of the present invention, the tip of the lead is cut off by a step or the like, and the volume is reduced accordingly. For this reason, the heat capacity transmitted during soldering is kept small, the leads are easily heated, it is possible to solder with tools and equipment with a small heat capacity, and the time required for the leads to reach a temperature suitable for soldering And workability is improved. Since only the tip of the lead is partially cut away, the path through which electricity flows does not deteriorate and the electrical resistance does not increase.

[0012]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show a first embodiment of the present invention. A soldering structure 10 according to this embodiment includes a sheet metal coil formed by pressing a copper mech plate or a flat wire wound in a coil shape. The plate-shaped transformer coil 13 such as an edgewise coil is connected to a surface 16a of an electrode 16 such as a substrate (not shown).

The plate-shaped transformer coil 13 is made by laminating coil materials 11 and 12 forming two coils having the same diameter. Both ends of the coil members 11 and 12 are formed as a pair of leads 14 which are metal pieces soldered to the electrodes 16, and the leads 14 are provided so as to extend sideways in parallel with each other. The leading end 11 a of the coil member 11 is formed longer than the leading end 12 a of the coil member 12 so that the lead 14 becomes longer as approaching the electrode 16.

Next, a method of manufacturing the soldering structure 10 according to this embodiment will be described. First, the lead 14 of the plate-shaped transformer coil 13 is superposed in parallel with the electrode 16 so that the coil material 11 contacts the electrode 16 with the coil materials 11 and 12 superposed. In this state, a soldering iron (not shown) heated to a predetermined temperature is brought into contact with a corner above the distal end portion 12a of the coil material 12 and a corner above the distal end portion 11a of the coil material 11 while bringing the solder 22 into contact therewith. Is melted. The molten solder 22 flows downward and covers the tip 11a of the coil material 11, the tip 12a of the coil material 12, and the electrode 16 near the tip 11a of the coil material 11. Then, when the soldering iron is released, the solder 22 is solidified in that state.

According to the soldering structure 10 of this embodiment, the lead 14 has a stepped step formed by forming the coil material 12 shorter than the coil material 11. Since the lead 14 is partially removed and the volume of the lead 14 is small, the heat capacity is small, and the amount of heat that escapes during soldering can be suppressed. Therefore, the lead 14 is easily heated and can be soldered with a tool or a device having a small heat capacity, so that the equipment cost of the tool or the device can be reduced. Further, since the heat capacity is small, the time required for the lead 14 to reach a temperature suitable for soldering is short, and workability is improved. Even when the lead 14 is formed of a thick coil material in order to suppress the electric resistance, it is possible to cope with a tool having a small heat capacity or other soldering equipment. Further, in this soldering structure 10, the lead 14 has a step-like step, and the cross-sectional area near the upper end of the lead 14 is small. However, electricity does not flow to that portion, and the distal end 11a of the coil material 11 is Since the gas flows through the portion in contact with 16, the path through which the electric current flows is not damaged, and the electric resistance does not increase. As a result, the conflicting effects of reducing the heat capacity can be obtained at the same time without increasing the electric resistance. Further, since the tip 11a of the coil material 11 and the tip 12a of the coil material 12 are provided in a step-like step, when soldering by the soldering iron, the corners thereof come into contact with the soldering iron at the same time. The contact area is large and the heat of the soldering iron can be easily transmitted. Also from this point, there is an advantage that the time for the lead 14 to reach the temperature suitable for soldering is short, and the soldering efficiency and workability can be improved.

Next, a second embodiment of the present invention will be described with reference to FIGS. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted. The soldering structure 24 of this embodiment connects a transformer coil 26 made of a metal wire having a substantially circular cross section to the surface 16 a of the electrode 16.

The transformer coil 26 is formed by bending a metal wire into a predetermined shape, and both ends of the metal wire are leads 28 that are soldered to the electrodes 16, and the leads 28 extend sideways in parallel with each other. Is provided. The leading end surface 28a of the lead 28 is cut so as to intersect at an angle other than a right angle with respect to the lead-out direction of the lead 28, for example, about 20 ° to 70 ° with respect to the lead-out direction, and is provided in an elliptical shape. Have been. The tip surfaces 28a provided on the leads 28 are provided substantially parallel to each other.

Next, a method for manufacturing the soldering structure 24 of this embodiment will be described. First, the lead 28 of the transformer coil 26 is arranged outward so that the tip surface 28a of the lead 28 does not face the surface 16a of the electrode 16, and the tip surface 28a intersects the surface 16a at an acute angle. Layer as if to do. In this state, the solder 22 is melted while a soldering iron heated to a predetermined temperature is brought into contact with the lead 28. The molten solder 22 flows downward and hardens to cover the tip surface 28a of the lead 28 and the electrode 16 near the tip surface 28a.

According to the soldering structure 24 of this embodiment, the tip surface 28a of the lead 28 is provided at an acute angle facing upward with respect to the electrode 16, and the outer corner portion of the lead 28 is notched obliquely. As a result, the volume of the soldered portion of the lead 28 is small. For this reason, the heat capacity of the lead 28 is small, and the heat that escapes during soldering is suppressed. The lead 28 is easily heated and can be soldered with tools and equipment having a small heat capacity. Equipment costs for tools are reduced. Even when the lead 28 is provided with a thick metal wire in order to reduce the electric resistance, tools and equipment having a small heat capacity can be used. Further, although the vicinity of the upper end of the lead 28 is cut away and thinned, electricity does not flow to that portion and the electric resistance does not increase. As a result, it is possible to simultaneously obtain the contradictory effects of reducing the heat capacity without increasing the electric resistance.

Next, a third embodiment of the present invention will be described with reference to FIGS. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted. In the soldering structure 30 of this embodiment, a transformer coil 34 formed by bundling a plurality of metal wires 32 in the longitudinal direction is connected to the surface 16 a of the electrode 16.

The transformer coil 34 is formed by bending a bundled metal wire into a predetermined shape, and both ends of the metal wire are leads 36 that are soldered to the electrodes 16, and the leads 36 are laterally parallel to each other. It is provided to extend to. The tips 32 a of the metal wires 32 of the leads 36 are located at different positions at different levels along the lead-out direction.

Next, how to make the soldering structure 30 of this embodiment will be described. First, the distal ends 32a of the metal wires 32 of the leads 36 of the transformer coil 34 are formed so as to be randomly different in level. Then, the side surface of the metal wire 32 of the lead 36 is overlapped at a position where the side surface contacts the surface 16 a of the electrode 16. In this state, the solder 22 is melted while a soldering iron heated to a predetermined temperature is brought into contact with the lead 36. The melted solder 22 flows downward and hardens to cover the tip 32a of each metal wire 32 of the lead portion 36 and the electrode 16 near the tip 32a.

According to the soldering structure 30 of this embodiment, since the leading ends 32 a of the metal wires 32 of the lead 36 are provided at different levels, the leading end of the lead 36 is finely and partially cut away. In this state, the volume of the lead 36 can be reduced. For this reason, the heat capacity of the lead 36 is small and the heat transmitted during soldering is suppressed, and the lead 36 is easily heated and can be soldered with tools and equipment having a small heat capacity. Equipment costs can be reduced. Although the vicinity of the tip of the lead 36 is partially cut away, electricity does not flow to that portion, and the path through which electricity flows is not impaired and the electrical resistance does not increase. As a result, the conflicting effects of reducing the heat capacity can be simultaneously obtained without increasing the electric resistance.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted. The soldering structure 38 according to this embodiment includes four coil materials 40, 41, 42, which form a sheet metal coil formed by pressing a plated copper plate or an edgewise coil formed by winding a rectangular electric wire in a coil shape. A plate-shaped transformer coil 44 formed by laminating 43 is connected to the electrode 16.

In the plate-shaped transformer coil 44, both ends of the coil members 40, 41, 42, 43 are formed as leads 46 which are soldered to the electrodes 16, and the leads 46 extend sideways in parallel with each other. Is provided. The lengths of both ends of the coil members 40, 41, 42, and 43 are not uniform, and the tip portions 40 a, 41 a, 42 a, and 43 a of the coil members 40, 41, 42, and 43 extend in the lead-out direction of the lead 46. On the other hand, they are in different positions at different levels. The end surfaces of the tip portions 40a, 41a, 42a, 43a are formed substantially at right angles to the lead-out direction of the lead 46.

Next, a method of making the soldering structure 38 of this embodiment will be described. First, the coil members 40, 41, 42, 43 are overlapped such that the tips 40a, 41a, 42a, 43a of the leads 46 of the transformer coil 44 are located at random. Then, a soldering iron heated to a predetermined temperature is brought into contact with each of the corners of the coil members 40, 42, and 43 by overlapping the lead 46 with a position where the lead 46 is in contact with the surface 16 a of the electrode 16. Let melt. The melted solder 22 flows downward and hardens to cover the tip portions 40a, 41a, 42a, 43a of the coil members 40, 41, 42, 43 and the electrode 16 near the tip portion 40a.

According to the soldering structure 38 of this embodiment, the tip portions 40 a, 41 a, 42 a, 43 a of the coil members 40, 41, 42, 43 of the lead 46 are moved in the direction in which the lead 46 is pulled out. The leads 46 are located at different positions at different levels, and the leading end of the lead 46 is partially cut away, so that the volume of the lead 46 can be reduced. For this reason, the heat capacity of the lead 46 is small and the heat transmitted during soldering is suppressed, and the lead 46 is easily heated and can be soldered with tools and equipment having a small heat capacity. Can be suppressed. Although the vicinity of the tip of the lead 46 is partially narrowed in a partially cut state, electricity does not flow to that part, and the electric resistance is large without impairing the path through which the electricity flows. It will not be. As a result, it is possible to simultaneously obtain the contradictory effects of reducing the heat capacity without increasing the electric resistance. In addition, since the solder is in contact with a plurality of places such as the coil members 40, 42, and 43, the heat of the solder is easily transmitted, and the solder is in a state suitable for soldering.

Note that the soldering structure of the electric component of the present invention is not limited to the above embodiments, and the number of coil materials of the transformer coil and the number and shape of the metal wires can be freely changed. . The electric component mounted by the soldering structure of the present invention can be applied to various electric components other than the transformer coil.

[0029]

【Example】

 An embodiment of the soldering structure of the present invention will be described. First, a four-layer plate-shaped transformer coil was manufactured using a 0.3 mm-thick copper plate as a coil material in which four rectangular wires were wound in a coil shape, and the lead portions were stepped to form a 60 W power supply. The electrode 16 was soldered with a soldering iron. As a result, when the soldering operation of the lead having the same coil volume was about 10 seconds, it took about 5 seconds in this embodiment, and the operation time was greatly reduced.

From this, it has been found that the soldering structure for electric parts of the present invention has an effect of greatly improving the efficiency of the soldering operation.

[0031]

[Effect of the invention]

 The soldering structure for electrical parts of this invention can be soldered with tools and equipment with a small heat capacity while suppressing an increase in electrical resistance with a simple structure, reducing equipment costs and reducing the time to supply heat. And workability is improved. In addition, the soldering efficiency can be improved regardless of the shape and type of the metal piece of the electric component.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a soldering structure of a coil which is an electric component according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a structure for soldering a coil which is an electric component of the embodiment.

FIG. 3 is a perspective view showing a structure for soldering a coil which is an electric component according to a second embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of a structure for soldering a coil which is an electric component of the embodiment.

FIG. 5 is a perspective view showing a structure for soldering a coil which is an electric component according to a third embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of a structure for soldering a coil which is an electric component of the embodiment.

FIG. 7 is a perspective view showing a structure for soldering a coil which is an electric component according to a fourth embodiment of the present invention.

FIG. 8 is a longitudinal sectional view of a structure for soldering a coil which is an electric component of the embodiment.

FIG. 9 is a perspective view showing a soldering structure of a coil, which is a conventional electric component.

FIG. 10 is a longitudinal sectional view of the soldering structure of the coil of FIG. 9;

FIG. 11 is a longitudinal sectional view of a soldering structure of another electric component according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Soldering structure 11, 12 Coil material 11a, 12a Tip part 13 Plate-shaped transformer coil 14 Lead 16 Electrode 22 Solder

Claims (6)

[Utility model registration claims] 1. A soldering structure for an electrical component having a metal piece soldered to a predetermined electrode, wherein a portion of the metal piece to be soldered is divided into a plurality of parts, and each of the divided metal pieces has a tip. The part is formed in a step-like step extending as approaching the electrode, wherein a soldering structure for an electric component is provided. 2. A soldering structure for an electric component having a metal piece to be soldered to a predetermined electrode, wherein a tip of the metal piece to be soldered is formed to have a tip surface cut at an acute angle. Wherein the metal piece is provided in contact with the surface of the electrode in parallel with the longitudinal direction, and the tip end face is provided facing outward with respect to the electrode surface. Attachment structure. 3. A soldering structure for an electrical component having a metal piece soldered to a predetermined electrode, wherein a tip of the metal piece to be soldered is divided into a plurality of pieces along a longitudinal direction of the metal piece. The divided end portions of the metal piece are located at different levels from each other. 4. The transformer according to claim 1, wherein said metal piece is a tip of a lead of a transformer coil.
A soldering structure for the described electrical component. 5. The soldering structure for an electric component according to claim 4, wherein said metal piece is a tip end of a lead of a coil formed by winding a coil of a pressed sheet metal or a rectangular wire. . 6. The soldering structure for an electric component according to claim 1, wherein the metal piece is a tip of a lead in which a plurality of metal wires are bundled.