JPH0311905Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Application of the Invention) The present invention relates to a mounting structure for electronic circuit devices such as converters, inverters, or rectifiers, and is particularly concerned with mounting two sets of devices as one unit. The objective is to provide a structure suitable for

(Prior art and its problems) An electronic circuit device, such as a converter, which is constructed by mounting and connecting required components on a printed wiring board (insulating substrate), is connected to a plurality of sets, for example, two sets, corresponding to the load capacity of an electronic computer, etc. When using a set of parallel connected electronic circuit devices, each electronic circuit device is attached to a storage frame within the device by a method such as erection. However, in this case, in order to protect the individual electronic circuit devices, it is common to house them in a case that is designed to have a space between them. As a result, the electronic circuit device becomes larger, and the shape of the frame that accommodates it also becomes larger, which inevitably requires a larger installation space. In general, the converter shown in Fig. 1 includes a rectifier circuit REC for an AC power source AC, a switching circuit S consisting of a switching element such as a transistor that controls on/off its DC output, and its drive circuit, a power conversion transformer T, and a rectifier for its output. For those with a power conversion transformer T, such as one consisting of a circuit REC ₁ , a smoothing circuit F, etc., the height of the transformer T generally occupies a large installation area on the printed wiring board P surface, as shown in Figure 2. Higher than component PA,
This determines the height of the case C that protects the device. For this reason, an increase in size cannot be avoided, resulting in an increase in the installation space within the device.

Therefore, it is of course difficult to meet the current demand for miniaturization of devices, and if the installation space for the device is preset, it may not be possible to accommodate the device unless some measure is taken.

For example, as shown in Figure 3, 1 of the printed wiring board P
Transformer T or large parts with relatively high height on the surface
PA ₁ is connected, and on the other side there is a low-height component PA ₂ that does not have much of a problem with the height of the transformer T.
By using a method of gathering and connecting the parts, the mounting area and the mounting space are reduced. However, with this method, the height still remains the same,
In particular, when electronic circuit devices A and B are installed vertically side by side as shown in FIG. 4, it is unavoidable to have a gap G between each device, which further increases the space required for installation. Therefore, the conventional method of housing each electronic circuit device in its own protective case and installing it inside the device is difficult to meet the demand for lowering the height and reducing the size of the installation space. .

The present invention provides a structure in which a plurality of sets of electronic circuit devices as described above, particularly two sets of devices, can be accommodated in the same protective case while reducing the height, thereby making it possible to reduce the installation space.

[Structure of the idea]

(Means for Solving the Problems) Figures 5a, b, and c are exploded perspective views and assembled front views showing an embodiment of the present invention in a converter or inverter having a power conversion transformer as a component as described above. The present invention is characterized by the following points.

That is, as shown in FIG. 5a, two printed wiring boards of the same shape are made, each having a through notch PH at one end, which is large enough to insert the transformer T, which has the highest height compared to the other parts. Then, a transformer T is mounted and connected to the other end of each, and the plate surface between this and the notch PH that passes through it has a chip capacitor of intermediate height, such as a chip capacitor used in a smoothing circuit. Collect and connect parts PA ₁ . In addition, on the back side of the printed wiring board P, that is, the opposite side to the installation side of the transformer T, etc., the lowest height components _PA2 , such as transistors, resistors, etc. that form a switching circuit, are collected and connected to form two sets of electronics of the same shape. Circuit devices A, B
Configure. Then parts with intermediate height
Apply adhesive CE to the head surface of PA ₁ and make the image shown in Figure 5b.
After integrating the devices A and B by inserting the transformers T with the highest height into the through-holes PH of the mating printed wiring board P and gluing them together, as shown in Figure 5c. It is characterized in that it is housed and fixed within a protective case C.

(Function and Effect) As is clear from the comparison between Figure 2 showing the conventional structure and Figure 5 b showing the present invention, the transformer is the highest component in the conventional structure. There is wasted space SP (see Figure 2) due to the difference in height between T and other parts PA. However, in the present invention, the transformer T is placed in the through cutout PH provided in the printed wiring board P so that the head of the transformer T escapes, so parts of intermediate height
The heads of PA ₁ can be brought into contact with each other, and the wasted space SP in the above conventional structure can be filled.
Therefore, the height can be reduced compared to the conventional method in which electronic circuit devices are configured and mounted separately. Furthermore, since they can be housed in a common protective case, the distance G between each electronic circuit device A and B is not required compared to the case where they are stacked vertically as shown in FIG. The installation height of the device can be lowered, and the space required for installation can be reduced.

(Modified example) Although the present invention has been described above with respect to an electronic circuit device having a power conversion transformer that is taller than other components, it can also be applied to devices that generally consist of components of different heights. . Also, the through notch PH into which the highest height component is inserted is the fifth
It is not open at one end as shown in the diagram, but
As shown in the perspective view of FIG. 6, the hole may be a round hole, a square hole, or the like. Further, when there are a plurality of parts PA having the highest height on one printed wiring board as shown in FIG. 7, a plurality of through-cuts may be provided. It goes without saying that the present invention can also be applied to a case where electronic components are connected only to one side of a printed wiring board as shown in FIG. 2, and similar effects can be obtained.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram showing an example of an electronic circuit, Figure 2 is an example of an electronic circuit device formed by mounting electronic components on a printed wiring board, and Figure 3 is an electronic circuit device with a reduced installation area. Figure 4 shows an example of the mounting method, Figures 5a, b, and c are an exploded perspective view showing an example of the present invention, an assembled front view, and a perspective view showing the state housed in a protective case, and Figure 6. , FIG. 7 is a perspective view showing a modified embodiment of the present invention. AC...alternating current power supply, REC...rectifier circuit, S...
Switching circuit, T...Transformer for power conversion,
REC ₁ ... Rectifier circuit, F... Smoothing circuit, C... Protective case, PA... High height components such as power conversion transformers, PA ₁ ... Intermediate height components, PA ₂ ...
...Parts with the lowest height, A, B...Electronic circuit device, P...Printed wiring board (insulating board), PH...Through cutout.

Claims (1)

[Scope of utility model registration request] A mounting part for a part that is taller than other parts is provided by leaning over one end, and a part that is taller than other parts is placed in a position corresponding to the taller part at the other end. The high-height components were respectively attached to the mounting portions of the high-height components of two printed wiring boards of the same shape, each having a through-cutout portion, and the other components were respectively attached to the remaining printed wiring board surface 2. An electronic circuit device characterized in that electronic circuit devices having the same shape are formed by overlapping each other with each tall component inserted into a through cutout of a tall component provided on a mating printed wiring board.