JP3794453B2 - Device control printed circuit board mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting structure for a device control printed board in which a device control circuit is divided and mounted on a plurality of printed circuit boards.
[0002]
[Prior art]
FIG. 6 is a structural diagram showing a conventional example of the mounting state of a plurality of printed circuit boards equipped with device control circuits, and shows the mounting state of two printed circuit boards for controlling a power conversion device composed of semiconductor switch elements. ing. In the conventional example of FIG. 6, one of the two printed circuit boards is the power supply printed circuit board 2 on which the control circuit power supply is mainly mounted, and the other printed circuit board is mainly mounted on the control circuit. 3. When installing these in the box of the power conversion device that is the device to be controlled, if two printed circuit boards are arranged on the same plane, there may be a problem that the mounting area becomes too large. Is arranged so that both printed circuit boards are stacked one above the other. When the control board 3 is arranged vertically, the control print board 3 is equipped with an operation touch panel and a data display. Therefore, the control print board 3 is placed on the upper side so that these operations and visual recognition can be easily performed. Install the power printed board 2 on the lower side.
[0003]
Since the power supply printed board 2 installed on the lower side is equipped with a transformer, a reactor, and the like, it is avoided that leakage magnetic flux from these components adversely affects the control printed board 3 installed immediately above it. Therefore, a shield plate 4 is provided between the two printed boards (for example, the lower surface of the control printed board 3).
[0004]
[Problems to be solved by the invention]
Since both of these printed circuit boards 2 and 3 have a two-story structure, the printed circuit board mounting legs 5, 6, and 7 formed by processing metal plates into complicated shapes are used as power converters. However, it is necessary to attach these printed circuit board mounting legs 5, 6 and 7 to the power converter, and to attach the power printed circuit board 2 and the control printed circuit board 3 to these printed circuit board mounting legs 5, 6 and 7. I need it. That is, it takes time to process the printed board mounting legs 5, 6, and 7 into complicated shapes, to attach them, and to manage stock of these parts. In addition, it is necessary to insulate the metal printed board mounting legs 5, 6 and 7 from coming into contact with the wiring pattern of the printed circuit board, or to increase the size of the printed circuit board so that the printed circuit board mounting legs 5, 6 and 7 are attached at a portion without the wiring pattern. Furthermore, in order to electrically connect a plurality of printed circuit boards, a terminal block and a flat cable for interconnection are required, and a wiring space occupied by the flat cable is also required. is there.
[0005]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to reduce the number of components when mounting a plurality of printed circuit boards for device control on a device, to reduce the mounting space, and to simplify wiring between printed circuit boards.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the mounting structure of the device control printed circuit board of the present invention comprises:
When the control circuit of the device is divided into a plurality of printed boards, the bottom entry type connector insertion side, or the insertion side, or both the insertion side and the insertion side are mounted on each printed board. These printed circuit boards are mounted on a separate printed circuit board tray made of synthetic resin, and this printed circuit board tray has an opening at the position of the inserted bottom entry connector mounted on the mounted printed circuit board. Provide. Assume that printed circuit board trays on which these printed circuit boards are separately mounted are stacked one above the other.
[0007]
A printed circuit board engaging portion capable of rotating the printed circuit board by engaging one side of the printed circuit board mounted on the printed circuit board tray, and rotating until the printed circuit board is parallel to the printed circuit board tray. The printed circuit board claw portion that engages the other side of the printed circuit board with the elastic claw, and the printed circuit board that is attached in parallel with the printed circuit board tray as necessary is fixed to the printed circuit board tray. And a screw hole for the printed circuit board tray.
[0008]
The printed circuit board tray is provided with a plurality of rear surface protrusions on the rear surface. When mounting the printed circuit board trays one above the other, the tray mounting legs for mounting these trays are provided with cutouts that engage with the protruding parts on the back, and are attached to the printed circuit boards mounted on each printed circuit board tray. The insertion of the notch portion and the rear surface protruding portion is started before the pin of the insertion side bottom entry type connector is inserted into the insertion side bottom entry type connector.
[0009]
The printed circuit board tray is provided with reinforcing ribs on the back side, or holes for wire lashing bands on the periphery.
A printed circuit board is mounted on the printed circuit board tray through an electrostatic shielding plate or an electromagnetic shielding plate as necessary.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an exploded view showing a first embodiment of the present invention, and shows each printed circuit board and its accessories in an exploded state when two printed circuit boards are attached in a stacked manner.
In FIG. 1, after the power printed board 2 is mounted and fixed to the second printed circuit board tray 20, the second printed circuit board second tray 20 is placed in the U-shaped recess of the tray first mounting leg 31. Therefore, the notch 32 is visible on the front side of the second printed circuit board tray 20. On the other hand, since the rear side of the second printed circuit board tray 20 is inserted into the U-shaped recess of the second tray mounting leg 33 and the third tray mounting leg 34 is mounted thereon, the second printed circuit board second tray 20 is mounted. A notch 35 is visible on the rear side.
[0011]
With the control printed board 3 attached to the first printed circuit board tray 10 via the shield plate 9, the rear surface protruding portion 14 provided on the back surface of the printed circuit board first tray 10 (not only on the rear side but also on the front side). And the cutout portion 32 (rear side) or the cutout portion 35 (front side), the control printed board 3 is superimposed on the power printed board 2 at a predetermined relative position. The insertion side of the bottom entry type connector is mounted on the control printed board 3, and a connector opening 11 is opened at a position corresponding to the bottom entry type connector of the first tray 10 for printed circuit boards. The pins on the insertion side of the bottom entry type connector mounted on the lower power printed board 2 are inserted into the inserted side through the connector opening 11, so that the power printed board 2 and the control printed board 3 The electrical connection of is completed. The first printed circuit board tray 10 and the second printed circuit board tray 20 have exactly the same shape.
[0012]
The engagement between the rear surface protruding portion 14 and the cutout portion 32 or the cutout portion 35 serves as a guide for smoothly inserting the insertion pin of the bottom entry connector into the insertion side. The height of the rear surface protruding portion 14 is determined in advance so that the insertion side pin is inserted after the position is determined.
FIG. 2 is a structural diagram showing a state in which the components shown in the first embodiment of FIG. 1 are combined. The relative positions of the power printed board 2 and the control printed board 3 are slightly shifted and overlapped.
[0013]
FIG. 3 is a cross-sectional view of a printed circuit board tray representing a second embodiment of the present invention. The printed circuit board first tray 10 is provided with a printed circuit board engaging portion 12 and a printed circuit board claw portion 13. These are illustrated as being integrally formed with the first printed circuit board tray 10. However, a different one (for example, metal) from the first printed circuit board tray 10 is formed in the same shape as shown in the drawing. There is no problem even if it is attached to the first tray 10.
[0014]
As shown in FIG. 3, one side of the control printed board 3 is hooked on the printed circuit board engaging portion 12 in the state of a one-dot chain line, and is rotated about the rotation center so that the opposite side is on the printed circuit board nail portion 13. If the state is drawn in a solid line, the control printed board 3 can be easily fixed to the first tray 10 for printed circuit boards. As a precaution, it can be fixed more securely by screwing in one or two places.
[0015]
FIG. 4 is a structural view showing a third embodiment of the present invention, and shows the surface of a printed circuit board tray. In FIG. 4, a plurality of lashing openings 15 are provided at the peripheral edge of the printed circuit board first tray 10, and the electric wire 17 can be easily fixed by passing the lashing band 16 therethrough. it can.
FIG. 5 is a structural diagram showing the fourth embodiment of the present invention. By providing reinforcing ribs vertically and horizontally on the back surface of the printed circuit board tray, the first printed circuit board tray 10 is made thin. Even when molded, the strength does not decrease.
[0016]
【The invention's effect】
When storing multiple printed circuit boards that control the device in a stacked state, each printed circuit board is conventionally mounted with a mounting leg that has been processed by sheet metal processing. For example, according to the present invention, there are various inconveniences, such as a lot of time and labor for managing parts and labor, and labor and space for electrical connection between printed circuit boards. By mounting separate printed circuit boards on the same shape printed circuit board tray formed of synthetic resin, an effect of eliminating the need for insulating parts and reducing the time for insulation can be obtained. In addition, the bottom entry type connector is mounted on these printed circuit boards, and the electrical connection between the stacked printed circuit boards is made directly with this bottom entry type connector, so that the labor of connection can be omitted. In addition, a flat cable is unnecessary, and the effect of saving space can be obtained. At this time, the positioning structure that engages the notch of the tray mounting leg with the back surface protrusion provided on the back surface of the printed circuit board tray prevents excessive force from acting on the bottom entry connector and damaging it. In addition, since consideration is given to facilitating wire lashing, a great effect can be obtained in reducing the number of parts and labor.
[Brief description of the drawings]
FIG. 1 is an exploded view showing a first embodiment of the present invention. FIG. 2 is a structural view showing a state in which components shown in the first embodiment of FIG. 1 are combined. FIG. 3 is a second embodiment of the present invention. FIG. 4 is a cross-sectional view of a printed circuit board tray illustrating an example. FIG. 4 is a structural diagram illustrating a third embodiment of the present invention. FIG. 5 is a structural diagram illustrating a fourth embodiment of the present invention. Structure diagram showing a conventional example of the mounting situation of multiple printed circuit boards with a circuit [Explanation of symbols]
2 Power supply printed board 3 Control printed board 4, 9 Shield board 5-7 Printed board mounting leg 10 First printed circuit board tray 11 Connector opening 12 Printed circuit board engaging part 13 Printed circuit board nail part 14 Back surface protruding part 15 Tightening Opening portion 16 Tightening band 17 Electric wire 20 Second tray 31 for printed circuit board Tray first mounting leg 32, 35 Notch 33 Tray second mounting leg 34 Tray third mounting leg

Claims (5)

In the device control printed circuit board in which the device control control circuit is divided into a plurality of printed circuit boards,
Each printed circuit board is mounted with the insertion side of the bottom entry connector, or the insertion side, or both the inserted side and the insertion side, and a printed circuit board tray made of synthetic resin for mounting the printed circuit board is provided for each printed circuit board. The printed circuit board tray is provided with an opening at the mounting position of the inserted bottom entry connector on the printed circuit board mounted on the printed circuit board tray, and the printed circuit board tray on which the printed circuit board is mounted is provided. A mounting structure for a printed circuit board for controlling an apparatus, wherein the printed circuit boards are arranged one above the other. In the mounting structure of the apparatus control printed circuit board according to claim 1,
The printed circuit board tray has a printed circuit board engaging portion capable of rotating the printed circuit board by engaging one side of the printed circuit board mounted on the printed circuit board tray, and the printed circuit board includes the printed circuit board. A printed circuit board claw portion that engages the elastic claw with the other side of the printed circuit board when rotated until it is parallel to the printing tray, and, if necessary, a parallel printed circuit board is fixed to the printed circuit board tray. An apparatus control printed circuit board mounting structure comprising: a screw hole. In the mounting structure of the equipment control printed circuit board according to claim 1 or 2,
The printed circuit board tray is provided with a plurality of rear surface protrusions on the rear surface, and the tray mounting leg for attaching the upper or lower printed circuit board tray when the printed circuit board trays are stacked one above the other. A notch with a shape that engages with the back protrusion, and the back-side protrusion is inserted into the inserted bottom entry connector by the insertion-side bottom entry connector attached to the printed circuit board mounted on each printed circuit board tray. A structure for mounting a printed circuit board for device control, characterized in that the engagement of the notch portion and the rear surface protruding portion is started before being performed. In the mounting structure of the apparatus control printed circuit board according to claim 1,
The printed circuit board tray is provided with a reinforcing rib on the back side, or a hole for a wire lashing band on the periphery of the printed circuit board tray. In the attachment structure of the printed circuit board for apparatus control of Claim 1 thru | or 4,
The printed circuit board tray is mounted with a printed circuit board via an electrostatic shielding plate or an electromagnetic shielding plate as required, and is mounted on the printed circuit board tray.

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