JPH0739257Y2 - Printed wiring board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of the Invention> The present invention relates to a printed wiring board.

<Prior Art and its Problems> In FIG. 2 showing a conventional example, B is a printed wiring board, 21 is a board constituting a main part of the printed wiring board B, and 22
Is a wiring pattern formed by printing a conductor such as copper on the substrate 21, 23 is a rectangular irregular hole formed through the substrate 21 in a part of the wiring pattern 22, and 24 is a irregular hole 23. The resist formed on the substrate 21 except for a part of the wiring pattern 22 is a resist 24.
It is a U-shaped non-resist portion in which is not formed.

Further, C is a tab terminal as an example of an electric component, an electronic component, etc. The tab terminal C has a protrusion 31 inserted into the deformed hole 23 and a protruding portion 31 screwed in the deformed hole 23. It is composed of notches 32 on both sides of the base portion for facilitating the twisting, a step portion 33 which is positioned in contact with the surface of the substrate 21, and a main body portion 34.

Next, the procedure for connecting and fixing the tab terminal C to the printed wiring board B will be described with reference to FIG.

The projection 31 of the tab terminal C is inserted into the irregular hole 23 of the substrate 21.
This insertion is performed until the notch 32 is formed beyond the odd-shaped hole 23 and the step 33 comes into contact with the back surface of the substrate 21. In this state, the operator grasps the projection 31 protruding from the odd-shaped hole 23 with a tool and twists it in one direction to prevent the projection 31 from coming out of the odd-shaped hole 23. Then, solder is applied between the protrusion 31 and the wiring pattern 22 to form the protrusion 31.
And the wiring pattern 22 are electrically connected, and the tab terminal C is fixed to the printed wiring board B.

The hole through which the protrusion 31 is inserted is the irregular hole 23 so that when the protrusion 31 is twisted, the protrusion 31 is prevented from idling and becomes a reaction point of the twist. This is because Further, the reason why the non-resist portion 25 is formed is to improve the adhesion of solder.

However, the conventional example having such a configuration has the following problems.

That is, the twist angle of the protrusion 31 varies depending on the operator and even with the same operator over time.
If the twist angle of the protrusion 31 is too small, the function of preventing the protrusion 31 from coming off from the deformed hole 23 is weak, and the tab terminal C may come off from the printed wiring board B. Conversely, the protrusion
If the twist angle of 31 is too large, the notch at the base of the protrusion 31
The protrusion 31 may be twisted off from the position of 32.

However, it is difficult for an operator to constantly twist the protrusion 31 within a predetermined angle range that does not cause slipping out and twisting, which causes a reduction in work efficiency and yield.

<Purpose of Invention> The present invention has been made in view of the above circumstances, and it is possible to twist the protrusion within a predetermined angle range in which the protrusion does not slip out or be twisted. The purpose is to

<Structure and Effect of Invention> [Structure] The present invention has the following structure in order to achieve such an object.

That is, the printed wiring board of the present invention comprises: a board on which a wiring pattern and a resist are formed; a rectangular terminal insertion hole formed through the board in a portion of the wiring pattern; It is provided with a twist angle display non-resist portion formed to have a predetermined angle with an edge line portion of the wiring pattern along the longitudinal direction of the terminal insertion hole.

[Action]

 The operation of this configuration is as follows.

In other words, when inserting a tab terminal or other protrusion into the terminal insertion hole and twisting it, if you twist the protrusion using the non-resist portion for displaying the twist angle as an index, the twist angle of the protrusion is too large. It can be avoided that it is too small or too small.

〔effect〕

From the above, according to the present invention, the following effects are exhibited.

That is, since the protrusion is twisted using the non-resist portion for displaying the twist angle as an index, it is possible to prevent the twist angle from being varied due to individual differences, and the protrusion can be accurately and within a predetermined angle range. Can be easily twisted. Therefore, the retaining function can be sufficiently exerted, and the projecting portion can be surely prevented from being twisted, so that the work efficiency and the yield can be improved.

Further, even when the torsion angle is inspected, the torsion angle display non-resist portion can be judged as a reference, so that the inspection can be performed accurately and quickly.

Then, such a function can be realized by an extremely simple structure.

<Description of Embodiments> Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view of an essential part of a printed wiring board according to an embodiment of the present invention.

The wiring pattern 2 is formed by printing a conductor such as copper on the substrate 1 which constitutes the main part of the printed wiring board A.
And a rectangular terminal insertion hole 3 is formed through the substrate 1 in a part of the wiring pattern 2. Further, a resist 4 is formed on the substrate 1 except the wiring pattern 2. Note that FIG. 1 shows a state in which a part of the resist 4 is removed.

Reference numeral 5 denotes a non-resist portion on which the resist 4 is not formed, and shows a portion corresponding to the U-shaped non-resist portion 25 of the conventional example (FIG. 2). Then, at two diagonal corners of the non-resist portion 5, fan-shaped twist angle display non-resist portions 6 are formed so as to be continuous with the non-resist portion 5. The angle formed by the longitudinal direction of the terminal insertion hole 3 and the non-resist portion 6 for displaying the twist angle is 30 degrees for one side 6a and 60 degrees for the other side 6b. The angle occupied by is 30 degrees.

The configuration of the tab terminal C as an example of an electric component, an electronic component, etc. is similar to that of the conventional example.

Next, a procedure for connecting and fixing the tab terminal C to the printed wiring board A will be described.

The protrusion 31 of the tab terminal C is inserted into the terminal insertion hole 3 of the substrate 1, and the operator grasps and twists the protrusion 31 protruding from the terminal insertion hole 3 with a tool. This twisting is carried out by using the two twist-angle displaying non-resist portions 6 as an index, and is carried out until the projection 31 comes within the range of the twist-angle displaying non-resist portion 6. That is, if the twisting angle of the protrusion 31 is within the range of 30 to 60 degrees, neither insufficient twisting nor over-twisting will occur, and the retaining function for the substrate 1 will be good and the protrusion 31 It is also possible to prevent the screw from being twisted at the notch 32.

The point of soldering the protrusion 31 and the wiring pattern 2 after the twist of the protrusion 31 is the same as in the conventional example.

In the above embodiment, the non-resist portion 6 for displaying the twist angle is used.
However, the number of non-resist portions 6 for displaying the twist angle may be one. Further, although the non-resist portion 6 for displaying the twist angle has a fan shape of 30 to 60 degrees, the angle of the fan depends on conditions such as the shape and size of the terminal insertion hole 3 and the strength of the protrusion 31. It may be appropriately determined depending on the situation. further,
Instead of the fan shape, a band shape or a thin line shape may be used.

[Brief description of drawings]

FIG. 1 is a plan view of an essential part of a printed wiring board according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing a main part and a tab terminal of a printed wiring board according to a conventional example, and FIG.
The figure is a perspective view showing a combined state. A: Printed wiring board 1 ... Board 2 ... Wiring pattern 3 ... Terminal insertion hole 4 ... Resist 6 ... Non-resist part for twist angle display

Claims (1)

[Scope of utility model registration request] 1. A substrate on which a wiring pattern and a resist are formed, a rectangular terminal insertion hole formed through the substrate in a part of the wiring pattern, and a longitudinal direction of the terminal insertion hole near the terminal insertion hole. A printed wiring board comprising: a twist angle display non-resist portion formed so as to have a predetermined angle with an edge line portion of the wiring pattern along the direction.