JPH0513030Y2 - - Google Patents

Description

[Detailed description of the invention] "Purpose of the invention" (Industrial application field) This invention is based on the invention when attaching a grounding member such as a chassis or a casing to a printed wiring board. This is related to a grounding metal fitting for a wiring board for connecting to a grounding pattern, and after inserting the grounding terminal part formed at the bottom of the metal fitting body into the printed wiring board and soldering it to the grounding pattern, the metal fitting body is attached to the printed wiring board side. It relates to a device configured to be bent and a grounding member fixed thereto.

(Prior Art) Conventionally, as shown in FIG. 6A, a grounding member 13 such as a chassis or a case is connected to a printed wiring board
When attaching to the grounding member 13, it is attached by screwing a mounting screw (not shown) into the mounting screw hole 12 formed in the printed wiring board 11 from the screw hole 14 formed in the grounding member 13. A grounding fitting 15 having a fixing hole 16 corresponding to the screw hole 14 is used for grounding the grounding pattern (not shown) formed on the lower surface of the printed wiring board 11.

A conventional grounding fitting 15 of this type is shown in FIG. 6A.
In the device shown in FIG. 1, the grounding terminal portion 18 formed at one end of the metal fitting body 17 is bent downward in advance, and this is bent downward when the printed wiring board 11 is inserted.
While the wire is inserted into the insertion hole 19 formed in the hole 19, it is subjected to flux treatment in a flux jet bath and soldered in a solder dip bath or the like. Also, Figure 6B
In the case shown in FIG. 1, grounding terminal portions 18 are formed at both ends of the metal fitting body 17.

(Problems to be solved by the invention) In the conventional device shown in Fig. 6 A and B,
The grounding terminal portion 18 is bent in advance at the end of the metal fitting body 17 and is connected to the printed wiring board 1.
Since the metal fitting is inserted into an insertion hole 19 formed in 1, the insertion operation requires two operations, which not only makes the work troublesome, but also makes it difficult to work because the metal fitting body 17 is in close contact with the top surface of the printed wiring board 11. , and in addition, the ground terminal part 1
8 had poor retention after insertion, and there was a risk that the metal fittings would come loose.

In addition, in the conventional type, since the screw holes 16 correspond to the mounting screw holes 12 from the beginning, the flux that is jetted during flux treatment is ejected from these holes to the upper surface side, and the flux adheres to the mounting screws. In some cases, the conductivity of the

Generally, a jig to prevent warpage of a printed wiring board during solder dipping is sometimes placed at the edge of the printed wiring board, and solder dipping tanks, conveyor guides, etc. are designed to support the edge of the printed wiring board. Therefore, if the grounding metal fitting is located at the end of the printed wiring board, this will be a problem, but in the conventional type, the metal fitting body 17 is arranged flatly on the printed wiring board 11 from the beginning, so it is not necessary to use the grounding metal fitting. There was a drawback that attachment to the edge of a printed wiring board was restricted.

The purpose of this invention is to eliminate the above-mentioned conventional drawbacks,
For wiring boards that are extremely easy to install, can accurately connect grounding members such as chassis and casings to the grounding pattern of the printed wiring board, and are not subject to restrictions on their placement positions. Our goal is to provide grounding fittings.

"Structure of the invention" (Means for solving the problem) The earthing fitting for a wiring board according to the invention has a structure in which the earthing terminal portion formed at the bottom of the fitting body is inserted into the insertion hole formed in the printed wiring board. The grounding terminal portion is fixed by soldering to the grounding pattern of the printed wiring board, and the grounding member such as the casing or chassis is screwed to the printed wiring board through the fixing hole formed in the main body of the metal fitting. In the grounding fitting for a printed wiring board, the fitting main body is formed in a plate-like form such that it stands temporarily on the printed wiring board when the grounding terminal portion is inserted into the insertion hole. A bendable part is formed between the ground terminal part and the metal fitting body, and after the ground terminal part is inserted into the printed wiring board and soldered to the ground pattern, the metal fitting body is connected to the bendable part to print wiring. The grounding member is bent toward the board, so that the fixing hole formed in the metal fitting body corresponds to the screw hole formed in the printed wiring board, and the grounding member is fixed with screws.

The bendable portion may be a curved portion that is slightly curved in advance, or may be narrow in width or thin.

(Function) When the grounding terminal part is inserted into the insertion hole formed on the printed wiring board, the metal fitting body is temporarily fixed in an upright position on the printed wiring board, so the grounding terminal part is placed in a grounding pattern using a solder dip bath, etc. After soldering, bend the bendable part and tilt the metal fitting body toward the top of the printed wiring board. As a result, the fixing hole formed in the metal fitting body corresponds to the mounting screw hole formed in the printed wiring board, so that a grounding member such as a chassis or a casing can be screwed through the fixing hole.

Since the metal fitting itself stands up on the printed wiring board until it is soldered, even if it is placed at the edge of the printed wiring board, it will not interfere with the guide of the solder dip tank or conveyor, and Since the screw holes of the wiring board and the fixing holes of the metal fitting body are separated, there is no chance of flux adhering to the fixing holes. After the soldering process, the bendable portion may be bent and the grounding member may be secured with screws.

(Example) An example of the grounding fitting for a printed wiring board according to the present invention will be described based on FIGS. 1 to 4.

Figure 1 is a perspective view, Figure 2A is a perspective view showing the grounding terminal inserted into the insertion hole of the printed wiring board, Figure 2B is a sectional view of the same, and Figure 3 is the installation of the earthing member. FIG. 4 is an exploded perspective view showing the state, FIG. 4 is a perspective view showing the formation form of the bendable part, and FIG. 5 is a front view showing another example of the structure of the metal fitting main body.

In the figure, reference numeral 1 indicates the entire grounding fitting for a printed wiring board, and the fitting main body 2 has a substantially rectangular shape, and a slit 3b is formed in the lower part of the fitting body to form grounding terminal portions 3, 3. A retaining portion 3a that bulges outward is formed at the tip of the terminal portion 3. In addition, insertion amount regulating stoppers 4 are protruded on both sides of the grounding terminal portion 3, so that the amount of insertion when the grounding terminal portion 3 is inserted into the insertion hole 19 formed in the printed wiring board 11 is limited. Regulated. As a result, the retaining portion 3a accurately contacts the ground pattern 8 on the back surface of the printed wiring board 11. In this case, it is also possible to use a terminal bending machine or the like in a normal electronic component placement apparatus to bend the grounding terminal parts 3, 3 outward and bring them into contact with the grounding pattern. A bendable portion 5 is formed between the grounding terminal portion 3 and the metal fitting body 2. In addition, the formation form of this bendable part 5 will be explained in detail later. A fixing hole 6 is bored in the metal fitting body 2, and this fixing hole 6 is formed in the printed wiring board 11 when the metal fitting main body 2 is bent from the bendable part 5 toward the upper surface side of the printed wiring board 11. By screwing the screw 7 through the screw hole 14 drilled in the grounding member 13 of the chassis or case, it is firmly attached to the printed wiring board 11. It is becoming fixed.

FIG. 4 is a perspective view showing the formation form of the bendable portion, and FIG.
Figure B shows the ground terminal part 3.
The width is narrowed by forming a slit 5b on the side of the plate. Figure C shows a bendable part formed by forming a thin part 5c.

FIG. 5 shows a configuration in which the tip of the metal fitting body 2 is cut into a mountain shape 2a so that it can fit into a corner portion of a printed wiring board 11.

Next, to explain an example of use, the grounding terminal part 3 of the grounding fitting 1 for a printed wiring board shown in FIG.
is inserted into the insertion hole 19 formed in the printed wiring board 11 as shown in FIG. As a result, the metal fitting main body 2 is accurately held upright in a temporarily fixed state by the elastic force of the ground terminal parts 3, 3, and the retaining part 3a is located at the ground pattern 8 on the lower surface of the printed wiring board 11, so that it can be maintained in this state. Soldering is done using a solder dip bath. In this state, the metal fitting body 2 is upright, so even if flux treatment is performed, there is no risk of flux adhering to the fixing hole or the metal fitting body.
Even if it is placed at the end of the solder dip tank, it will not interfere with the guide of the conveyor that transfers the solder dip to the solder dip tank or the guide in the solder dip tank. In addition, the printed wiring board 11 is soldered in a solder dip bath.
Even when a warp prevention jig is placed along the edge of the printed wiring board 11 in order to prevent warping, there is no problem. Note that, as described above, in the above step, the grounding terminal parts 3, 3 may be brought into contact with the grounding pattern by respectively bending them outward on the back side of the printed wiring board.

When attaching the grounding member 13 such as a chassis or a casing, when the metal fitting body 2 is tilted toward the top surface of the printed wiring board, it can be accurately bent from the bendable portion 5.
Since the fixing hole 6 of the metal fitting body 2 corresponds to the mounting screw hole formed in the printed wiring board 11, the screw hole 14 of the grounding member 13 is made to correspond to the fixing hole 6,
Just fix it with screw 7.

"Effects of the Invention" According to the grounding fitting for a printed wiring board according to the invention, after the grounding terminal part is inserted into the insertion hole formed in the printed wiring board and soldered in a solder dip bath, the bendable part is removed. The metal fitting body is bent to the top side of the printed wiring board, and as a result, the fixing hole formed in the metal fitting body corresponds to the mounting screw hole formed in the printed wiring board, so the chassis can be attached through the fixing hole. A grounding member such as a housing or a housing can be fixed with screws, and the grounding member can be firmly fixed and can be accurately grounded to a grounding pattern via a grounding metal fitting.

Since the metal fitting itself stands up on the printed wiring board until it is soldered, even if it is placed at the edge of the printed wiring board, it will not interfere with the guide of the solder dip tank or conveyor, and Since the screw hole of the wiring board and the fixing hole of the metal fitting body are separated from each other, there are excellent effects such as no flux adhering to the metal fitting body or the fixing hole.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the grounding fitting for a printed wiring board according to the present invention, with Figure 1 being a perspective view and Figure 2A showing the grounding terminal inserted into the insertion hole of the printed wiring board. FIG. 2B is a sectional view of the same as above; FIG. 3 is an exploded perspective view showing how the grounding member is attached; FIG. 4 is a perspective view showing the form of the bendable part; FIG. 5 FIG. 3 is a front view showing another example of the structure of the metal fitting main body. FIGS. 6A and 6B are perspective views showing examples of conventional grounding fittings. 1...Earth metal fitting body, 2...Metal fitting body, 3...
...Earth terminal part, 5...Bendable part, 6...Fixing hole, 7...Screw, 8...Earth pattern, 11
...Printed wiring board, 12...Mounting screw hole, 1
3...Grounding member, 14...Screw hole.

Claims (1)

[Claims for Utility Model Registration] 1. Arranged by inserting the ground terminal part formed at the lower part of the metal fitting body into the insertion hole formed in the printed wiring board, and connecting the ground terminal part with the ground pattern of the printed wiring board by soldering. In a grounding fitting for a printed wiring board, which is attached and fixed, and a grounding member such as a housing or chassis is screwed to the printed wiring board through a fixing hole formed in the fitting main body, the above-mentioned fitting body is When the ground terminal part is inserted into the insertion hole, it has a plate-like form that stands up temporarily on the printed wiring board, and there is a bendable part between the ground terminal part and the metal fitting body. The fixing hole is formed at a position corresponding to a screw hole formed in the printed wiring board when the metal fitting main body is bent from the bendable part toward the printed wiring board. Grounding metal fittings for printed wiring boards. 2. The earth fitting according to claim 1 of the utility model registration, wherein the bendable portion is a curved portion that is slightly curved in advance. 3. The earth fitting according to claim 1 of the utility model registration, characterized in that the bendable portion is formed into a narrow width. 4. The earth fitting according to claim 1 of the utility model registration, characterized in that the bendable portion is formed thinly.