JP2530052Y2 - Structure for mounting heavy parts on printed circuit boards - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting heavy parts on a printed circuit board, and more particularly to a structure for mounting heavy parts on a printed circuit board which is suitable for countermeasures against impact.

[0002]

2. Description of the Related Art Conventionally, there has been provided a structure for mounting heavy parts on a printed circuit board as shown in FIGS.

[0003] In the figure, 11 is a printed circuit board, 11a is a continuous slit surrounding the periphery of a mounting part for heavy parts, 11b
Is a plurality of discontinuous slits surrounding the mounting part of the heavy component together with the continuous slit 11a, 11c is a slit discontinuity between the discontinuous slits 11b, 11d is a mounting hole provided in the transformer mounting part. Holes for screws of the same pitch, 11e is a mounting portion on which the transformer 12 is mounted, 12 is a transformer which is a type of heavy component, 12a is a mounting portion for mounting the transformer 12 on the printed circuit board 11, and 12b is a screw provided on the mounting portion 12a. Holes for 13
Is a chassis, 13a is a fixing portion of the transformer 12 provided on the chassis 13, 13b is a hole of the printed circuit board 11 provided on the fixing portion 13a.
A screw hole provided at the same position as 11d is a screw for mounting the transformer 12.

Conventionally, a structure for attaching a heavy component such as a transformer 12 to a printed circuit board 11 is based on the first example shown in FIGS. 2 and 4 in which only a hole 11d for attaching the transformer 12 is provided in the printed circuit board 11. Two holes 12b, 12b for screwing the transformer 12 are placed in alignment with the two holes 11d, 11d, and a screw 14 is inserted into each of the holes 12b, 12b, and the two fixing portions 13a,
It is fastened to the screw holes 13b, 13b of 13a.

As a result, although the transformer 12 is completely fixed, a crack Y shown in FIG.

In the second example shown in FIGS. 3 and 4, the mounting portion 12a of the transformer 12 is pressed against the printed circuit board 11 so that the crack Y does not enter the printed circuit board 11 due to the impact or the like. 11e is a continuous slit as shown in FIG.
Surrounded by a slit 11b discontinuous with 11a, the strength is reduced to prevent the crack Y from expanding.

As a result, if the transformer 12 is mounted with the screws 14 in the same manner as described above, the drop discontinuity causes the slit discontinuity portion 11c of the discontinuous slit 11b to break, and no external force is applied to other portions. And crack Y did not expand.

[0008]

However, the above-mentioned conventional structure for mounting heavy parts on a printed circuit board has a structure in which only holes for screws are provided on the printed circuit board.
Cracks occurred on the printed circuit board, which were widespread.

[0009] Further, the transformer has been adhered to improve the adhesion between the mounting portion of the transformer and the printed circuit board and to absorb an impact. For this reason, labor and material costs were high.

Further, if a continuous slit and a discontinuous slit are provided on the printed circuit board so as to surround the mounting portion of the transformer, the expansion of cracks can be prevented. There was a drawback that stress was concentrated on the discontinuous portion and the material was easily broken.

This invention has been made in view of the above points, and aims at solving the disadvantages of the prior art, preventing cracks due to dropping or vibration from expanding, and allowing the mounting portion to be dipped even when dipped. It is an object of the present invention to provide a structure for mounting a heavy component of a printed circuit board without warping.

[0012]

According to the present invention, there is provided a structure for mounting a heavy part on a printed circuit board, the structure including a continuous slit and a discontinuous slit surrounding a mounting portion provided on the heavy part mounted on the printed circuit board. In the heavy component mounting structure, at least one slit discontinuous portion is provided near an intermediate portion of the continuous slit.

[0013]

According to the present invention, the periphery of the mounting part of the heavy part is surrounded by the continuous slit and the discontinuous slit, and at least one slit discontinuous portion is provided near the middle of the continuous slit. Even when the printed circuit board is dipped, the mounting portion does not warp, and cracks caused by dropping or vibration after mounting the transformer are limited to a certain range without expanding.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a structure for mounting heavy parts on a printed circuit board according to the present invention will be described with reference to FIG.

The same parts as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 1, reference numeral 1 denotes a printed circuit board. 1a
Is a slit that is divided into two by providing one slit discontinuous portion near the middle of a U-shaped continuous slit that surrounds the periphery of the attachment part of the heavy component. 1b is two slits 1
Slit discontinuous part provided near the middle part of a, 1a, 1c is a plurality of discontinuous slits surrounding the mounting part of heavy parts together with slit 1a, 1d is slit discontinuity between discontinuous slits 1c 1e is a hole for a screw having the same pitch as the mounting hole 12b provided in the mounting portion 12a of the transformer 12, and 1f is a slit 1a.
A mounting portion for mounting the mounting portion 12a of the transformer 12, which is surrounded by 1a and the discontinuous slit 1c.

In the structure for mounting heavy parts such as the transformer 12 on the printed circuit board 1 according to the present invention, the mounting parts 12a, 12a provided on both sides of the transformer 12 are connected to the mounting part of the printed circuit board 1.
1f, the holes 12b, 12b of the mounting portions 12a, 12a,
The holes 1e, 1e of the mounting portions 1f, 1f and the fixing portions 13a, 13 shown in FIG.
The screw holes 13b, 13b of a coincide. Screw in these two holes
The transformer 12 is fastened to the fixed portions 13a, 13a by inserting the transformers 14, 14.

Two fixed parts 13a, 13 provided on the chassis 13
The surface where a contacts the printed circuit board 1 is inside the mounting portions 1f, 1f of the printed circuit board 1, and supports the transformer 12 via the printed circuit board 1.

Therefore, when the transformer 12 mounted on the printed circuit board 1 is subjected to impact, vibration, or the like due to a drop, the mounting sections 1f, 1f are surrounded by slits 1a, 1a and discontinuous slits 1c, respectively. Since the strength is weakened, the slit discontinuous portions 1b and 1d in this portion are broken, and no excessive force is applied to other portions of the printed circuit board 1.

This prevents the crack Y from occurring.

Further, since one slit discontinuous portion 1b is provided in the vicinity of the middle portion of the continuous slit, even if the printed circuit board 1 is dipped, the two mounting portions 1f, 1f do not warp.

A plurality of discontinuous slit portions 1b for dividing the continuous slits may be provided according to the weight and shape of the heavy parts mounted on the printed circuit board 1.

In the slit structure surrounding the periphery of the attachment part 12a of the heavy part, a continuous slit and a slit discontinuity part 1b may be appropriately provided instead of the discontinuous slit 1c.

As the heavy parts, in addition to the transformer 12, large block chemistons and metal fittings can be considered. When these heavy parts are mounted, the same structure as described above is applied to increase the crack Y on the printed circuit board. Can be prevented. Also, the terminals of these heavy components can be inserted into the mounting hole of the printed circuit board, dipped, and grounded.

[0025]

According to the structure for mounting a heavy component on a printed circuit board according to the present invention, since the structure is as described above, cracks do not expand against falling or vibration and can be limited to a range where there is no actual harm.

Further, even if the printed circuit board is dipped, there is an effect that the mounting portion does not warp.

Further, since the bonding is not required, labor and material costs can be reduced.

Moreover, it has excellent features such as simple structure and easy implementation because it can be constructed at a low cost.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a structure for mounting a heavy component on a printed circuit board according to the present invention;

FIG. 2 is a perspective view showing a first example of a conventional printed circuit board heavy component mounting structure.

FIG. 3 is a perspective view showing the second example.

FIG. 4 is a front view showing the same example.

[Explanation of symbols]

 1 Printed circuit board 1a Slit 1b Slit discontinuity 1c Discontinuous slit 1d Slit discontinuity 1e Hole 1f Mounting part 12 Transformer 12a Mounting part 12b hole 13 Chassis 13a Fixing part 13b Screw hole 14 Screw

Claims (1)

(57) [Scope of request for utility model registration] 1. A printed circuit board heavy component mounting structure in which a periphery of a mounting portion provided on a heavy component to be mounted on the printed circuit board is surrounded by a continuous slit and a discontinuous slit. A structure for mounting a heavy component on a printed circuit board, wherein two slit discontinuous portions are provided.