JPH0391987A - Printed board for power supply circuit - Google Patents

Abstract

PURPOSE:To enable the soldering of a regulator provided with a radiator accurately positioned without using a jig or the like and to make the radiator dissipate heat enough by a method where a printed board of this design is provided with a removable part which is removed by cutting after the regulator is mounted. CONSTITUTION:Inserted components and terminals 2B of a regulator 2 are inserted into printed boards 11 respectively, which are dipped into a solder dip tank to be automatically soldered as they are. At this point, a radiator 2A of the regulator 2 is placed on a removable part 18. After the components and the regulator 2 are mounted, when a linking pieces 13 and 14 are removed by cutting grooves 15, the removable part 18 is removed with the linking piece 13 through a slit hole 17, the printed boards 11 are separated into pieces along cut separating lines 12, and the separated printed boards 11 are mounted on a chassis. At this point, the radiator 2A of the regulator 2 is directly joined to the chassis. By this setup, the radiator 2A is very accurately positioned and efficiently dissipates heat.

Description

[Detailed Description of the Invention] Industrial Application Fields The present invention relates to a board for constructing a power supply circuit device by mounting various parts including at least a three-terminal regulator, and particularly requires miniaturization. The present invention relates to a printed circuit board for a power supply circuit suitable for the construction of a power supply circuit in a unit component for communication equipment such as a BS converter for receiving satellite broadcasting.

<Prior Art> This type of conventional power supply circuit device generally has a structure as shown in FIGS. 3 and 4 or 5 and 6. That is, in the case of FIGS. 3 and 4, heat dissipation parts 2A are installed at predetermined locations on the printed circuit board 1 on which various electronic components are mounted.
A 3-terminal regulator 2 having a 3-terminal regulator 2 is mounted, its 3-terminal portion 2B is attached to a printed circuit board 1 by soldering 3, and this printed circuit board 1 is fixed to a chassis 4 with screws 5. Here, the heat dissipation section 2A of the three-terminal regulator 2 is fixed to the chassis 4 by screws 5 with the printed circuit board 1 interposed therebetween.

On the other hand, in the case of FIGS. 5 and 6, the printed circuit board 6 has a shape in which the part facing the main body and the heat dissipation part 2A of the three-terminal regulator 2 is removed, and the three terminals of the three-terminal regulator 2 are Soldering the terminal part 2B to the printed circuit board 6 3
When attaching, the heat dissipating section 2A is held at a height position using the jig 7 at which it can be directly attached to the chassis when the printed circuit board 6 is bonded and fixed to the chassis after this soldering 3 is attached. It is directly fixed to the chassis with screws 5, allowing efficient heat dissipation.

Problems to be Solved by the Invention> However, the former configuration has a three-terminal regulator 2.
Since two heat dissipating sections are bonded and fixed to the printed circuit board 1, the heat dissipation effect of the heat dissipating section 2A depends on the thermal conductivity of the material of the printed circuit board 1 and the area of the conductor pattern. There is a problem in that the heat dissipation effect is poor compared to when it is directly bonded to the chassis.

On the other hand, the latter requires a jig 7 to hold the heat dissipation part 2A in a predetermined position when soldering the three terminal part 2B to the printed circuit board 6, and the soldering also requires dissociation. If this is done automatically, the solder 3 will adhere to the heat dissipating section 2A, so it will have to be done manually, and there is a problem in that it takes time to assemble the power supply circuit device, increasing manufacturing costs.

The present invention has been made in view of these conventional problems, and it is possible to accurately position the heat dissipation part of the regulator and solder the regulator without using a jig or the like. The present invention aims to provide a printed circuit board for a power supply circuit that can be attached by automatic soldering and has a shape that allows sufficient heat dissipation.

Means for Solving the Problems> In the present invention, as a technical means for achieving the above-mentioned problems, a printed circuit board for a power supply circuit is configured as follows. That is, in a printed circuit board for a power circuit to which a regulator having a plurality of terminals and a heat dissipation part is attached and which is fixed to a chassis, a groove for cutting and separation is formed along at least one side of a rectangular board. A connecting piece is formed between this groove and one side, and a plurality of printed circuit boards are connected in series by forming a cutting separation line in a direction perpendicular to the connecting piece. , in each of the printed circuit board sections, a portion facing the heat dissipation section of the regulator when the regulator is attached is a removed portion that is bordered by a slotted hole and is removed together with the connecting piece when the connecting piece is cut and removed; It is characterized by the fact that it is shaped like this.

<Function> When constructing a power supply circuit device using the printed circuit board, insert parts and regulator terminals are inserted into each printed circuit board section, and in this state, the parts are immersed in a solder dip bath and soldered automatically. At this time, since the heat dissipation part of the regulator is placed on the removed part, it is possible to solder the heat dissipation part while accurately positioning it without using a jig, and the solder rises due to the removed part. This prevents the adhesive from adhering to the heat dissipating part, so automatic soldering work can be performed without any trouble.

When the groove is cut and the connecting piece is removed after each component and the regulator are installed, the removed portion is removed along with the connecting piece through the slit hole.

Furthermore, the printed circuit board is separated into individual printed circuit board parts along a cutting separation line, and the printed circuit board parts are attached to the chassis. At this time, the heat dissipating part of the regulator was directly connected to the chassis because the removed part of the printed circuit board facing it was removed, and it was placed in the removed part during soldering and held in position. , precisely bonded to the chassis to achieve high heat dissipation effect.

<Example> Hereinafter, a preferred example of the present invention will be described in detail with reference to the drawings.

In FIG. 1 showing a plan view of an embodiment of the present invention and FIG. 2 showing a cut front view of a power supply circuit device configured using the same, the same parts as those in FIGS. 3 to 6 are the same. The description thereof will be omitted. In this embodiment, a printed circuit board 10 having three printed circuit board sections 11 arranged in series is illustrated. That is, grooves 15 for cutting and separation are formed along both sides, and connecting pieces 13 and 14 are formed on both sides of the grooves 15, respectively. The portion between both connecting pieces 13 and 14 has two groove-shaped cutting separation lines 1.
2 into three equal parts and divided into three printed circuit board parts 11. When the 3-terminal regulator 2 on each printed circuit board section 11 is installed, its main body section and heat dissipation section 2
A U-shaped separation slit hole 17 is bored at the removal location 18 facing A so as to border the connecting piece τ3 side.

Next, a procedure for constructing a power supply circuit section using the printed circuit board 10 of the embodiment described above will be explained. With the three printed circuit board sections 11 shown in FIG. 1 arranged in series, necessary surface mount components such as chimp capacitors are mounted on each printed circuit board section 11 using a mounter, and automatically by reflow. Solder. Subsequently, each insertion part having a terminal is inserted into the terminal hole (not shown) of each printed circuit board part 11 by an automated machine or manually, and finally, the 3-terminal part 2B of the forged 3-terminal regulator 2 is inserted. Insert it into the terminal hole as shown by the one-dot chain line in FIG. In this state, each inserted part and the 3-terminal regulator are automatically attached to a semi-EEIa by immersing it in a solder dip bath. At this time, the main body part and the heat dissipation part 2A of the three-terminal regulator 2 are placed and positioned on the removed parts 18 of each printed circuit board part 11, and the removed parts 18 cause the solder 3 to rise from the solder dispensing bath. Since this prevents the solder 3 from adhering to the heat dissipating section 2B, there is no problem even if the three-terminal regulator 2 is automatically soldered.

After each component and the three-terminal regulator 2 are mounted in this manner, first, the two connecting pieces 13 and 14 are separated and removed by cutting along the groove 15. At this time, the removed portions 18 of each printed circuit board portion 11 are also separated and removed together with the connecting piece portions 13 when the connecting piece portions 13 are separated. Next, after cutting along each cutting separation line 12 to separate the printed circuit board parts 11 into individual printed circuit board parts 11, the printed circuit board parts 11 are placed on a chassis 19 and fixed with screws 5, as shown in FIG.

Here, the heat dissipation part 2A of the three-terminal regulator 2 was placed in the removed part 18 and accurately positioned and held when the three-terminal part 2B was soldered, so it was joined to the chassis 19 with high precision. When this heat dissipation part 2B is fixed to the chassis 19 by tightening the screws 5, no extra force is applied to the three-terminal part 2B to which the solder 3 is attached, and deterioration of the quality of the three-terminal regulator 2 can be prevented.

Note that the present invention is not limited only to the contents of the above description and drawings, and may include various modifications without departing from the scope of the claims. For example, in the above embodiment, the case where three printed circuit board parts 11 are arranged is illustrated, but the number may be arbitrarily determined according to the standard size of the board material and taking into account the number effect. The overall dimensions and the dimensions of the connecting piece may be arbitrarily determined depending on the compatibility with the surface mount component mounting device.

Effects of the Invention> As described above, according to the printed circuit board for a power supply circuit of the present invention, by providing the removed portion that is cut and removed after the regulator is attached, the removed portion can be removed when the regulator is soldered. Since it can be used as a positioning member for the heat dissipation part, a positioning jig is not required, saving equipment costs, and the heat dissipation part can be positioned with high precision, so when screwing the heat dissipation part to the chassis etc. No extra force is applied to the regulator terminals that are soldered to the terminals, which prevents deterioration of regulator quality.

In addition, since it is possible to prevent solder from rising at the point where it is removed, it is possible to automate the soldering work of regulators and inserted parts.
Assembling the power supply circuit device can be done much more efficiently, and considerable cost reductions can be achieved.

Furthermore, since the removed portion can be cut and removed together with the connecting piece after soldering the regulator, the heat dissipation section of the regulator can be directly attached to the chassis, allowing efficient heat dissipation and high reliability.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a cutaway front view of a power supply circuit device configured using the board of FIG. 1, and FIG. 3 is a plan view of a conventional board. 4 is a cutaway front view of a power supply circuit device constructed using the board of FIG. 3, FIG. 5 is a plan view of another conventional board, and FIG. 6 is a cutaway front view of FIG. 5. 2-Regulator 2A...1 heat dissipation part 2B-1 terminal 10-1 printed circuit board for power supply circuit 11--printed circuit board section 12-1 cutting separation line 3.14...connecting piece part 15--1 groove part 17-slit hole 18-Removed part 19... - Chassis patent Applicant Sharp Corporation Representative Patent attorney Arata Nishida Figure 2-15 3 3rd v! J 4 Figure 4 Figure 6 Figure Ws6

Claims (1)

[Claims] (1) In a printed circuit board for a power circuit to which a regulator having a plurality of terminals and a heat dissipation section is attached and which is fixed to the chassis, a groove for cutting and separation is formed along at least one side of the rectangular board. A connecting piece part is formed between the groove part of the lever and one side, and a plurality of printed circuit board parts are connected in a row by forming a cutting separation line in a direction perpendicular to the connecting piece part in a part other than this connecting piece part. and a removal portion that is bordered by a slit hole and is removed together with the connecting piece when the connecting piece is cut and removed, in a portion of each printed circuit board portion facing the heat dissipation portion of the regulator when the regulator is attached. A printed circuit board for a power supply circuit, characterized in that it is formed with.