JPH04236496A - Printed wiring board supporting structure for power conversion device - Google Patents

Abstract

PURPOSE:To simplify a structure of a box, to facilitate handling and to reduce its cost by rotatably supporting one end of a holder for holding a printed board through a rotary shaft axially parallel to the opening surface of a square box opened at its outer periphery and containing the board and the inner wall surface of the box. CONSTITUTION:For example, when an inverter is repaired, inspected and regulated, a protection cover is removed, the opening surface of a box 10 is released, a printed wiring board 6 is rotated, and a screw 17 is removed, a holder 13 is rotated forward with a rotary shaft 12 as an axis, thereby repairing, inspecting and regulating an electric component 2 at the depth side in the box 10. After the repair, inspection and regulation, the holder 13 is rotated to a depth direction, its left end is clamped with the screw 17 to be held, and the board 6 and an electric component in the box 10 can be protected merely by mounting a protection cover and sealing the front opening of the box 10.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention relates to a printed wiring board support for a power converter, which rotatably supports a printed wiring board through a holder in a square box body that accommodates a printed wiring board and has an open outer peripheral surface. Regarding structure.

0002

2. Description of the Related Art In a conventional printed wiring board support structure for a power conversion device such as an inverter, the printed wiring board is rotatably supported via a holder that holds the printed wiring board in a box body with an open outer peripheral surface. Repair and inspection of printed wiring boards and other electrical components inside the square box. For convenience of adjustment, the box body accommodates electrical components and has a square box-like box body with an open outer circumferential surface;
It usually consists of an auxiliary box body in the shape of a square box-shaped door, which opens and closes the opening surface of this box body and whose outer peripheral surface is open. This auxiliary box body is rotatable to the box body via a rotation axis provided outside the box body, with the axial direction along one side of the square opening face of the box body, which is the opening face of this auxiliary box body. The printed wiring board is held within the auxiliary box. Therefore, this auxiliary box constitutes a part of the box and also serves as a holder for holding the printed wiring board, so it covers the opening surface of the auxiliary box and protects the printed wiring board inside the auxiliary box. In addition to requiring a cover, it is also necessary to take measures to seal the joint between the auxiliary box and the box main body to protect the electrical components inside the box main body. This allows you to remove the protective cover and open the opening of the auxiliary box to repair the printed wiring board, and rotate the auxiliary box to open the opening of the box to repair the electrical components inside the box. A conventional printed wiring board support structure of this type of inverter is shown in FIG. 4, which can be inspected and adjusted. FIG. 4 is a right cross-sectional view showing the internal configuration of a conventional inverter, with the upper side of the figure being the front side.

In FIG. 4, reference numeral 1 denotes a square box body with an open front surface, and this box body 1 houses an electrical component 2 and has a square box-like box body 3 with an open outer peripheral surface, and this box body 3. Auxiliary box body 4 in the shape of a square box-shaped door whose opening surface opens and closes and whose outer peripheral surface opens.
It is made up of. This auxiliary box body 4 is this auxiliary box body 4
The box body 3 is connected to the box body 3 via a rotation shaft 5 provided at the front left corner of the box body 1 outside the box body 1, with the axial direction along one side of the square opening face of the box body 1, which is the opening face of the box body 1. The printed wiring board 6 is rotatably supported in the auxiliary box 4. Therefore, this auxiliary box 4 constitutes a part of the box 1, and also serves as a holder 8 that holds the printed wiring board 6 with screws 7, and the opening surface of the auxiliary box 4 serves as a protective cover (not shown). At the same time, the opening surface of the box body 3 is sealed by closing the auxiliary box body 4 with a packing material 9 affixed to the joint portion of the auxiliary box body 4 and the box body 3.

With this configuration, the protective cover is removed and the opening of the auxiliary box 4 is opened to open the printed wiring board 6, and the auxiliary box 4 is rotated to open the opening of the box body 3 to open the box. The electrical components 2 in the main body 3 can be repaired, inspected, and adjusted. Also,
After repair, inspection, and adjustment, by attaching the protective cover and rotating the auxiliary box 4, the openings of the auxiliary box 4 and the box main body 3 are sealed to protect the printed wiring board 6 and the electrical components 2. can do.

[0005]

By the way, in such a conventional inverter printed wiring board support structure, the box body 1 houses the electrical components 2 and has a rectangular box-like box body 3 whose outer peripheral surface is open.
and an auxiliary box 4 in the shape of a square box-shaped door whose outer circumferential surface opens and closes the opening surface of the box body 3, and the auxiliary box 4 constitutes a part of the box 1. , printed wiring board 6
It also serves as a holder 8 for holding the box body 1.
is located outside. Further, the auxiliary box body 4, which also serves as a holder 8 for the printed wiring board 6, is not always stored in the box body 3, and the auxiliary box body 4 has the function of a lid for covering the opening of the box body 3. Therefore, a protective cover (not shown) is required to protect the printed wiring board 6 inside the auxiliary box 4 by sealing the opening surface of the auxiliary box 4, and the electrical components 2 inside the box body 3 are not connected to the auxiliary box 4. The joint portion with the box body 3 is sealed and protected with a packing material 9, which poses problems in that the inverter becomes expensive and the structure of the box becomes complicated.

The present invention simplifies the structure of a box that rotatably supports a printed wiring board inside, and provides a printed wiring board support structure for a power conversion device that is easy to handle and inexpensive. The task is to do so.

[0007]

[Means for Solving the Problems] In order to solve the above problems, according to the present invention, a printed wiring board is housed in a rectangular box whose outer peripheral surface is open, through a holder that holds the printed wiring board. In the printed wiring board support structure of a power converter that rotatably supports the printed wiring board, an axis is provided inside the box and is provided on an opening surface of the box and an inner wall surface of the box perpendicular to the opening surface. One end of the holder is rotatably supported via a rotation shaft whose longitudinal direction is parallel.

[0008] In addition to the above, it is also assumed that the holder comes into contact with an abutment portion formed on the box body at the end of rotation, thereby restricting its rotation.

[0009]

[Operation] This invention is provided in a rectangular box that accommodates a printed wiring board and has an open outer circumferential surface. Since one end of the holder for holding the printed wiring board is rotatably supported within the box through parallel rotation axes, the holder is not always stored in the box together with the printed wiring board. If you store other electrical components inside the box on the depth side of the printed wiring board and provide a protective cover to cover the opening of the box, you can easily remove the rotation axis during repairs, inspections, and adjustments. By rotating the holder around the axis, it becomes possible to repair, inspect, and adjust printed wiring boards and other electrical components.

In addition to the above, since the holder comes into contact with the abutting portion formed on the box body at the end of rotation and its rotation is restricted, when the holder is rotated, Since the holder comes into contact with the contact portion of the box and restricts the rotation of the box, it is possible to prevent the printed wiring board from coming into direct contact with the box and being damaged.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a perspective view of the main parts of an inverter printed wiring board support structure according to an embodiment of the present invention, viewed diagonally from the lower right side of the front, FIG. 2 is an enlarged cross-sectional view of the right side of FIG. 1, and FIG. FIG. 2 is a perspective view of the main parts of the inverter shown in FIG. 1 as viewed diagonally from the lower right side of the front; the upper side of each figure is the front side, and parts common or identical to those in FIG. 4 are designated by the same reference numerals.

In FIGS. 1 to 3, reference numeral 10 is a rectangular box with an open front surface, and the electrical components 2 are housed in the depth side of the box 10. As shown in FIG. The opening surface of the box 10 and the box 10 perpendicular to the opening surface are attached to both upper and lower ends of a flat horizontal U-shaped support 11 fixed to the inner surface of the left side wall of the box 10 on the front side of the electrical component 2. A pair of rotating shafts 12 having the same axis in the vertical direction and whose axial length directions are parallel are fixed to the inner surface of the left side wall. A substantially flat holder 13 holds the printed wiring board 6 on the front side via this rotation shaft 12 with screws 7.
is rotatably supported in the box body 10 at its left end. Bent portions rising forward are formed at both upper and lower ends of the holding body 13, and an arm-shaped portion 14 is formed at the left end of each bent portion to protrude forward in an arm-shape. Each of the rotation shafts 12 is fitted into a circular hole 15 formed in each of the arm-shaped parts 14, and the left end of the holder 13 is fixed to the inner surface of the right side wall of the box body 10, so that the cross-sectional shape is L-shaped. The holder 13 is held on the front side of the box 10 by being screwed to the support 16 with screws 17 so that the front surface of the holder 13 is aligned with the opening surface of the box 10. In addition, the front opening of the box body 10 is covered with a protective cover (not shown) to protect the printed wiring board 6 and other electrical components 2 inside the box body 10, and the holder 13 comes into contact with the rotating end to prevent its rotation. Abutting portions 18 and 19 are formed on the supports 11 and 16, respectively, to restrict the movement.

In the above configuration, the printed wiring board support structure for an inverter according to one embodiment of the printed wiring board support structure for a power converter according to the present invention allows the protective cover to be removed during repair, inspection, or adjustment of the inverter. By opening the opening of the removal box 10 and removing the printed wiring board 6, and by removing the screws 17 and rotating the holder 13 forward about the rotation shaft 12, the electrical equipment on the deep side inside the box 10 can be removed. Can repair, inspect, and adjust item 2. After repair, inspection, or adjustment, simply rotate the holder 13 in the depth direction, tighten the left end with the screw 17, and then attach the protective cover to seal the front opening of the box 10. The printed wiring board 6 and electrical components 2 inside the box 10 can be protected by this. Further, the bowl-shaped portion 14 of the holder 13 contacts the contact portion 18 at the front rotation end, and the right end portion contacts the contact portion 19 at the rear rotation end, thereby restricting its rotation. Therefore, when rotating the holding body 13,
It is possible to prevent the printed wiring board 6 from coming into direct contact with the box 10 and being damaged.

Therefore, the box body 10 has an integral structure, which simplifies the structure, and when the box body is composed of two parts, the box body and the auxiliary box body, as in the conventional printed wiring board support structure of an inverter. There is no need to seal the joint between these two parts with a packing material or the like.

[0015]

Effects of the Invention According to the present invention, a printed wiring board is housed in a rectangular box body whose outer peripheral surface is open, and the opening surface of the box body and the inner wall surface of the box body perpendicular to the opening surface. One end of the holder that holds the printed wiring board inside the box is rotatably supported via a rotation shaft whose axial length direction is parallel, so that the holder can be rotated inside the box together with the printed wiring board. It can be stored at all times, and once the protective cover covering the opening of the box is removed, the holder can be rotated around the rotation axis to remove the printed wiring board and the side deeper than the printed wiring board. This makes it possible to repair, inspect, and adjust other electrical components housed within the box, and the box is integrated, simplifying the structure.

In addition to the above, since the holder comes into contact with the abutting portion formed on the box body at the end of rotation and its rotation is restricted, even if the holder is rotated, Also, printed wiring boards that do not come into direct contact with the box will not be damaged.

As a result, it is possible to provide a printed wiring board support structure for a power conversion device that is easy to handle and has a simple box structure at a low cost.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of an inverter according to an embodiment of the present invention, as seen from the diagonally lower right side;

[Figure 2] Enlarged right side cross-sectional view of Figure 1

[Figure 3] A perspective view of the main parts of the inverter shown in Figure 1, viewed diagonally from the lower right side of the front.

[Figure 4] Cross-sectional view showing the internal configuration of a conventional inverter

[Explanation of symbols]

1 Box body 2 Electrical components 3 Box body 4 Auxiliary box body 5 Rotation axis 6 Printed wiring board 7 Screw 8 Holding body 9 Packing material 10 Box body 11 Support equipment 12 Rotation axis 13 Holding body 14 Arm-shaped part 15 Round hole part 16 Support equipment 17 Screw 18 Contact part 19 Contact part

Claims (2)

[Claims] 1. Printed wiring for a power conversion device that rotatably supports the printed wiring board through a holder that holds the printed wiring board in a square box body that accommodates the printed wiring board and has an open outer peripheral surface. In the plate support structure, one end of the holder is rotated through a rotation axis provided in the box body and whose axial direction is parallel to an opening surface of the box body and an inner wall surface of the box body perpendicular to the opening surface. A printed wiring board support structure for a power converter device, characterized in that it is movably supported. 2. A printed wiring board support structure for a power converter according to claim 1, wherein the holder comes into contact with a contact portion formed on the box body at a rotating end to restrict its rotation. Printed wiring board support structure of the device.