JPH0241916Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Technical field of the invention This invention is a method for fixing a printed board with the mounted part side down, such as when parts are later attached to the patterned surface of a printed board on which parts are mounted. This relates to a printed board support used when

(b) Conventional technology and problems On the patterned surface of the soldered printed board,
Flat package ICs and other parts may be attached later. In this way, in order to later attach components to a soldered printed board, the printed board must be supported with its pattern side facing up.

However, when supporting a printed board with the pattern side facing up, simply supporting both ends of the printed board may cause the printed board to curve due to the weight of the attached components. If a printed circuit board with retrofitted parts is installed in a device in such a state, strain will be applied to the retrofitted parts, causing an accident.

In order to prevent a printed board on which parts have been retrofitted from curving, it is necessary to support as much of the printed board as possible, including the center as well as the edges, and keep the printed board flat before attaching the parts. Must be.

However, many parts are already soldered to the printed board, and parts other than these parts must be supported, so the parts that can be supported are limited. Furthermore, in the case of high-mix, low-volume production, when printed boards have different types of parts and different mounting positions, it becomes necessary to determine the supporting position of the printed boards each time.

A conventional configuration diagram in such a case is shown in FIG.

In FIG. 2, 5 is a printed board, 6 and 7 are parts, 8 is a board, and 9 is a support rod.

A plurality of parts 6 are already soldered to the printed board 5 in FIG. 2, and these parts are placed on the bottom.
The printed board 5 is placed on a support rod 9 with the pattern surface 53 of the printed board 5 facing upward. The support rod 9 is fixed to the substrate 8 with screws or the like.

In FIG. 2, the printed board 5 is supported by four support rods 9, and the support rods 9 are arranged to directly contact the printed board 5 at locations where there are no parts 6 on the printed board 5.

If the printed board 5 is supported in a flat state as shown in FIG. 2 and the parts 7 are attached afterwards, no strain will be applied to the printed board 5, so each part of the printed board 5 will operate normally.

However, with the method of attaching the support rods 9 to the board 8 as shown in FIG. 2, the mounting position of the support rods 9 must be changed each time the type of printed board 5 changes, which is a time-consuming problem. be.

(c) Purpose of the invention This invention uses a board with multiple holes drilled at grid pitches on a printed board, support rods that can be inserted into the holes, and a mask board with cutouts for the mounting positions of the support rods. Even if the type of plate changes, the arrangement of the support rods can be easily changed by simply preparing a mask plate corresponding to the change.

(d) Example of the invention First, the configuration diagram of the example of this invention is shown in the first example.
As shown in the figure.

In FIG. 1, 1 is a substrate, 2 is a reference pin, 3 is a support rod, and 4 is a mask plate.

Next, a partial plan view of the substrate 1 is shown in FIG.

11 in Figure 3 is a hole, 12 and 13 are printed board 5
It is a line drawn at the interval of the grid size.

Holes 11 are made at the intersections of grids 12 and 13. In Figure 3, holes 1 are spaced four times the grid size.
1, but it suffices to open at a position that is an integral multiple of the grid size.

Next, a partial plan view of the component 6 side of the printed board 5 is shown in FIG.

In FIG. 4, 51 is a reference hole, and 52 is a support portion.

The reference hole 51 is a hole for positioning the printed board 5, and the support portion 52 is a portion to which the component 6 is not attached.

When retrofitting the part 7 shown in FIG.
2 is supported by a support rod 3.

In FIG. 4, the support portion 52 is marked with a circle,
The actual printed board 5 may or may not be marked.

Next, side views of the reference pin 2 are shown in FIGS. 5 and 6.

The reference pin 2 has a reference part 21 at one end and an insertion part 22 at the other end.

The reference part 21 is configured to be inserted into the reference hole 51 of the printed board 5, and the insertion part 22 is configured to be inserted into the reference hole 51 of the printed board 1.
Configure it so that it can be inserted into 1.

FIG. 5 shows an example in which there is one insertion section 22, and FIG. 6 shows an example in which there are two insertion sections 22. The spacing between the insertion portions 22 in FIG. 6 is the same as the spacing between the holes 11.

Also, the position of the reference part 21 in FIG.
It is convenient for use if it is manufactured so that it is placed directly above the insertion portion 22, or placed so that it is placed on the grid of the printed board 5 at a position in the middle of the insertion portion 22.

As shown in FIGS. 5 and 6, one or more insertion portions 22 are provided.

The reference pin 2 shown in FIG. 6 is required in the following cases.

When the holes 11 in the substrate 1 are made at an integral multiple of the lattice constant, the reference hole 51 in the printed board 5 may be located in the middle of the holes 11. In such a case, if the reference pin 2 shown in FIG.
A reference part 21 can also be provided.

Next, side views of the support rod 3 are shown in FIGS. 7 and 8.

The support rod 3 has a contact portion 31 at one end and an insertion portion 32 at the other end.

The contact portion 31 is configured to be able to contact the support portion 52 of the printed board 5, and the insertion portion 22 is configured to fit into the hole 1 of the board 1.
Configure it so that it can be inserted into 1.

FIG. 7 shows an example in which there is one insertion section 32, and FIG. 8 shows an example in which there are two insertion sections 32. The spacing between the insertion portions 32 in FIG. 8 is the same as the spacing between the holes 11.

Also, the position of the contact part 31 in FIG.
It is convenient to use it if it is made so that it is placed directly above the insertion part 32, or placed so that it is placed on the grid of the printed board 5 at a position in the middle of the insertion part 32.

As shown in FIGS. 7 and 8, one or more insertion portions 32 are provided.

The support rod 3 shown in FIG. 8 is required in the following cases.

When the holes 11 in the substrate 1 are formed at an integral multiple of the lattice constant, the supporting portion 52 of the printed board 5 may be located in the middle of the holes 11. In such a case, if the support rod 3 shown in FIG. 8 is used, the contact portion 31 of the support rod 3 can be brought to a position corresponding to the support portion 52 of the printed board 5.

Next, a plan view of the mask plate 4 is shown in FIG.

41A, 41B and 42A, 42B in FIG. 9 are cutouts.

The cutouts 41A and 41B are cut out in the space corresponding to the reference hole 51 of the printed board 5 in the space of the reference pin 2, and the cutout 41A is for the reference pin 2 in FIG. 5, and the cutout 41B is for the reference pin in FIG. 6. 2
It is for use.

Moreover, the cutouts 42A and 42B are cut out in the space of the support rod 3 at the location corresponding to the support part 52 of the printed board 5, and the cutout 42A is for the support rod 3 in FIG. 7, and the cutout 42B is for the support rod 3 in FIG. Support rod 3
It is for use.

The mask board 4 is prepared for each type of printed board 5 that requires retrofitting of parts.

Next, a method of using the printed board support according to this invention will be explained.

First, a mask plate 4 adapted to a printed board 5 is placed on the substrate 1.

Next, the insertion portion 22 of the reference pin 2 and the insertion portion 32 of the support rod 3 are inserted into the hole 11 of the substrate 1 using the cutouts 41 and 42 of the mask plate 4 as guides.

Next, the reference portion 21 of the reference pin 2 is inserted into the reference hole 51 of the printed board 5 with the component 6 of the printed board 5 facing downward.

Thereby, the contact portion 31 of the support rod 3 can be brought into contact with the support portion 52 of the printed board 5.

(e) Effect of the invention According to this invention, by placing the mask plate 4 that is compatible with the printed board 5 on the board 1, the reference pins 2 and the support rods 3 can be assembled on the board 1. 5 in a flat state, allowing for efficient retrofitting of parts.

[Brief explanation of drawings]

Figure 1 is a configuration diagram of an embodiment according to this invention, Figure 2
3 is a partial plan view of the board 1, FIG. 4 is a partial plan view of the component 6 side of the printed board 5, FIGS. 5 and 6 are side views of the reference pin 2, and FIG. 7
8 and 8 are side views of the support rod 3, and FIG. 9 is a plan view of the mask plate 4. 1... Board, 2... Reference pin, 3... Support rod,
4... Mask board, 5... Printed board, 6... Parts, 7... Parts, 8... Board, 9... Support rod, 1
1... Hole, 21... Reference section, 22... Insertion section, 3
1...Contact part, 32...Insertion part, 41A, 41B
...Cutout, 42A, 42B...Cutout, 51...
... Reference hole, 52 ... Support part, 53 ... Pattern surface.

Claims (1)

[Claims for Utility Model Registration] A substrate 1 having a plurality of holes 11 formed at intervals of an integral multiple of the grid size of a printed board 5, a reference portion 21 at one end, and one or more insertion portions 22 at the other end. A support rod 3 having a contact portion 31 at one end and one or more insertion portions 32 at the other end, and a space for the reference pin 2 at a location corresponding to the reference hole 51 of the printed board 5. Cutout 41 and
The mask board 4 has a cutout 42 formed by cutting out the space for the support rod 3 at a location corresponding to the support part 52 of the printed board 5.The mask board 4 is placed on the board 1, and the insertion part 22 of the reference pin 2 is inserted into the hole 11. and the insertion part 32 of the support rod 3 is inserted, the reference part 21 of the reference pin 2 is inserted into the reference hole 51 of the printed board 5, and the support part 52 of the printed board 5 is supported by the contact part 31. Printed board support.