JPH0633367U - Board and terminal mounting structure - Google Patents

Abstract

(57) [Summary] [Purpose] The positioning of the connection terminals is accurately performed with respect to the main board. [Structure] The terminal positioning portion 15 is fitted into the unit fixing hole 5 of the metal core substrate 1, and the connection terminal 3 and the input / output terminals 7 and 8 are connected.
And are fixed to the metal core substrate 1 by soldering. After that, the unnecessary connecting portion 12 is separated, and the child board 2 is soldered and fixed to the connection terminal 3. [Effect] By simply inserting the terminal positioning portion 15 into the unit fixing hole 5, the connection terminal 3 for the metal core substrate 1 can be obtained.
Can be positioned.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting structure for a board and a terminal, and more particularly to improving the positioning accuracy of the terminal.

[0002]

[Prior art]

 Conventionally, in a switching power supply device in which a power supply circuit and various control signal system circuits coexist, it is common to mount the components by separating both circuits in consideration of the influence of noise and the like. FIG. 2 shows an example of such a power supply device, 1 is a metal core board as a parent board on which various electronic components constituting the power supply circuit are mounted, 2 is provided on the top of the metal core board 1, This is a sub board on which various electronic parts for mounting a control signal system circuit are mounted, and a connection terminal 3 is provided between the metal core board 1 and the sub board 2 for electrically connecting both boards 1 and 2. , Are fixed by soldering via a plurality of conductive pins 4. As disclosed in Japanese Utility Model Publication No. 57-13936, the metal core substrate 1 is one in which an insulating layer is formed on the surface of a metal base having a heat dissipation effect, and a predetermined conductive pattern is arranged by printed wiring processing. At the end of the metal core substrate 1, two unit fixing holes 5 for mounting a case (not shown) are provided. Further, both ends of the metal core substrate 1 are electrically connected to the outside, and an input terminal 6 and an output terminal 7 which are external terminals provided separately from the connection terminal 3 are provided with conductive pins 8. It is fixed by soldering through. The connection terminal 3 and the input / output terminals 6 and 7 are both surface-mounted on the metal core substrate 1.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional technique, in order to prevent the child board 2 from being unable to be attached due to the displacement of each connection terminal 3, a dummy board having the same shape as the child board 2 is attached to the connection terminal 3 in advance as a positioning jig. Then, after the connection terminal 3 is soldered and fixed to the metal core substrate 1, a step of removing the dummy substrate from the connection terminal 3 is performed. However, this series of steps not only complicates the work of attaching and detaching the dummy substrate, but also tends to cause misalignment and inclination because the dummy substrate is manually attached. If the type 3 is mounted on the surface of the metal core substrate 1, the connection terminal 3 cannot be accurately positioned as a result.

In view of the above, the present invention solves the above-mentioned problems by providing a board and a terminal that can accurately position a connecting terminal with respect to a parent board without using a jig for positioning. It is intended to provide a mounting structure for.

[0005]

[Means for Solving the Problems]

 The present invention provides a mother board having unit fixing holes, a mother board provided on the mother board, a solder-fixed connection terminal for electrically connecting the mother board and the mother board, and the connection board. In a mounting structure of a board and a terminal which is provided separately from the terminal and has an external terminal soldered and fixed to the parent board, a connecting portion which can be separated is provided between the connection terminal and the external terminal. The external terminal and the external terminal are integrally formed, and the terminal positioning portion to be fitted into the unit fixing hole is formed in the connecting portion.

[0006]

[Action]

 With the above configuration, the terminal locating portion is fitted into the unit fixing hole of the parent board, and in this state, the connection terminal and the input / output terminal are soldered and fixed to the parent board. It is attached at a predetermined position on the main board. After that, the undesired connecting portion provided between the terminals is cut off, so that the daughter board can be soldered and fixed to the connection terminals.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, the same parts as those in the circuit diagram of FIG. 2 in the conventional example are designated by the same reference numerals, and detailed description of the common parts is omitted. In the figure, a rising portion 11 is formed at both ends of each connection terminal 3, and a connecting portion 12 that can be separated is provided between the connection terminal 3 and the input / output terminals 6 and 7 via the rising portion 11. Thus, the connecting portion 12 is formed at substantially the same height as the upper end portions 13 and 14 of the input terminal 6 and the output terminal 7, and the connecting terminal 3 and the input / output terminals 6 and 7 are integrally molded. Further, the configuration is the same as that of FIG. 2 except that a terminal positioning portion 15 that fits into the unit fixing hole 5 is formed in the connecting portion 12.

When assembling the power supply device having the above-described structure, first, the connection terminal 3 and the input / output terminals 6 and 7 are placed on the upper surface of the metal core substrate 1 while the terminal positioning portions 15 are fitted into the unit fixing holes 5. Then, in this state, when the connection terminal 3 and the input / output terminals 6 and 7 are fixed by soldering to the metal core substrate 1 through the pins 4 and 8, the unit fixing hole 5 and the terminal position protruding portion 15 are positioned. The connection terminals 3 and the input / output terminals 6 and 7 are attached to the metal core substrate 1 at predetermined positions. Then, when the rising portion 11 and the connecting portion 12 are separated from both ends of the connection terminal 3 and the input / output terminals 6 and 7, the connection terminal 3 and the input / output terminals 6 and 7 are separately provided on the metal core substrate 1. It will be mounted and fixed. After that, the child board 2 is soldered and fixed to the connection terminals 3 via the pins 4, whereby a series of assembling work is completed.

As described above, according to the above-described embodiment, the unit fixing hole 5 provided in the metal core substrate 1 in advance is used, and the simple operation of inserting the terminal positioning portion 15 into the unit fixing hole 5 is performed. Since the position of each connection terminal 3 with respect to the metal core substrate 2 is easily determined, it becomes possible to accurately position the connection terminal 3, unlike the case where a dummy substrate as in the conventional example is used. Further, after the connection terminal 3 and the input / output terminals 6 and 7 are fixed by soldering, the unnecessary connecting portion 12 and the terminal locating portion 15 are all cut off, so that the unit fixing hole 5 and the metal core substrate 2 can be removed. Other parts The mounting work of the connection terminal 3 and the input / output terminals 6 and 7 can be completed without sacrificing the mounting space.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, the parent substrate is not limited to the metal core substrate in the embodiments, but can be applied to various types of substrates. In addition, the terminal positioning portion may be appropriately formed according to the shape and number of unit fixing holes.

[0011]

[Effect of device]

 The present invention provides a mother board having unit fixing holes, a mother board provided on the mother board, a solder-fixed connection terminal for electrically connecting the mother board and the mother board, and the connection board. In the mounting structure of the board and the terminal, which is provided separately from the terminal and has the input / output terminal which is soldered and fixed to the parent board, the connection is provided by providing a separable connecting portion between the connection terminal and the input / output terminal. The terminal and the input / output terminal are integrally molded, and the terminal positioning portion that fits into the unit fixing hole is formed in the connecting portion. On the other hand, it is possible to provide a mounting structure of the substrate and the terminal, which enables accurate positioning of the connection terminal.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 metal core board (parent board) 2 child board 3 connection terminal 5 unit fixing hole 7 input terminal (external terminal) 8 output terminal (external terminal) 12 connecting part 15 terminal positioning part

Claims (1)

[Scope of utility model registration request] 1. A parent board having unit fixing holes,
A child board provided on the parent board, a solder-fixed connection terminal for electrically connecting the parent board and the child board, and a soldering-fixed separately provided to the parent board In a mounting structure of a substrate having an external terminal and a terminal, a disconnectable coupling portion is provided between the connection terminal and the external terminal to integrally mold the connection terminal and the external terminal and to fit into the unit fixing hole. A mounting structure for a board and a terminal, wherein a terminal positioning portion is formed on the connecting portion.