JPH0530399Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a substrate for forming an electric circuit, which includes a ground pattern formed on one or both sides, or a substrate for electrically connecting multiple electric circuits. The present invention relates to a structure for holding a substrate for shielding.

[Conventional technology] A conventional substrate holding structure is shown in FIG.

A ground pattern is formed on one or both sides of the part of this board that contacts the spring member 3 and the guide member 5, and by holding both sides of this board and fixing each to the shield plate, the ground pattern and the shield plate are formed. It is possible to ensure electrical connection with the

In the figure, four holes 2 are formed in a pair of shield plates 1, which are arranged in parallel and facing each other almost vertically, at predetermined intervals in the vertical direction at opposing positions.

Also, holes 4 are formed in the straight portions of the earth springs 3, which are a pair of spring members each having one end bent into a substantially S-shape, at positions that align with the holes 2 formed in the shield plate 1. There is. Furthermore, a pair of L-shaped guide members (hereinafter referred to as guide angles) 5 also have four tap holes 6, respectively.
is formed.

And four holes 2 formed in the shield plate 1
Insert screws 8 into two of them through the spring washers 7, and screw these screws 8 into the tap holes 6 formed in the guide angle 5 through the holes 4 formed in the earth spring 3. , the shield plate 1, the earth spring 3, and the guide angle 5 are screwed together.

At this time, the inner diameter of the hole 4 formed in the earth spring 3 is larger than the outer diameter of the screw 8, and the earth spring 3 is movable relative to the guide angle 5 in the direction of arrow A-A. and earth spring 3
A board 9 indicated by a two-dot chain line is inserted between the guide angle 5 and the guide angle 5, and both sides of the board 9 are held by the biasing force of the earth spring 3. The ground pattern and the ground spring 3 are brought into contact.

[Problem to be solved by the invention] In the conventional substrate holding structure configured as described above, the substrate 9 is held between the guide angle 5 and the earth spring 3 with an appropriate pressing force, and the substrate 9 is formed. In order to ensure that the ground pattern and the ground spring 3 are in contact with each other, the distance between the guide angle 5 and the ground spring 3 must be set appropriately when the board 9 is not being held.

For this reason, conventionally, during assembly, the guide angle 5 and the ground spring 3 are temporarily attached to the shield plate 1 with the screws 8, and then a spacer (shim) thinner than the board 9 is placed between the guide angle 5 and the ground spring 3. ) 10 were inserted and fixed with screws 8 at appropriate intervals. For this reason, there was a problem of poor assembly workability.

The present invention was developed in view of the above circumstances, and its purpose is to provide a circuit board clamping structure that can be assembled by easily setting an appropriate distance between a guide member (hereinafter referred to as a guide angle) and an earth spring. do.

[Means for Solving the Problems] A configuration for achieving the above object will be described with reference to drawings corresponding to embodiments.

The substrate clamping structure according to the present invention includes a shield plate 1
In the sandwiching structure of the substrate 9, in which both sides of the substrate 9 are sandwiched between the spring member 3 and the guide angle 5, which are screwed together, a protrusion 11 is formed on the guide angle 5, and the protrusion 11 is holes 2a formed in the shield plate 1 and the spring member 3, respectively;
4a for positioning.

[Operation] According to the configuration described later, the spring member 3 is formed and the diameter and position of the hole 4 and the diameter and position of the protrusion of the guide angle 5 are precisely processed by plastic working such as press working, and the protrusion 11 is formed. By fitting into the hole 4a, the distance D between the guide angle 5 and the spring member 3 can be maintained appropriately. As a result, the substrate 9 can be held between the spring member 3 and the guide angle 5 with an appropriate pressing force.

[Example] Hereinafter, an example of a substrate holding structure according to the present invention will be described with reference to the drawings.

An embodiment of the present invention is shown in FIGS. 1 and 2.

In the figure, parts that are the same or equivalent to those of the conventional example shown in FIG. 3 are denoted by the same reference numerals, and explanations thereof will be omitted.

Among the tap holes 6 formed in the guide angle 5 of the present invention, the tap holes 6 at the upper and lower ends are the same as conventional ones,
No tap holes are formed at the positions of the other two intermediate tap holes 6, but protrusions 11 are formed by embossing.

The outer diameter of these protrusions 11 is smaller within a predetermined tolerance than the diameter of the hole 4 formed in the earth spring 3 as a spring member, so that they fit into the two middle holes 4a with high precision. It is becoming more and more common. The predetermined tolerance range is determined by the accuracy of the distance D, which will be described later.

Furthermore, the shape of the earth spring 3, the diameter and position of the hole 4a, and the diameter and position of the protrusion 11 of the guide angle 5 are also processed with high precision. The above-mentioned precision can be easily obtained.

Next, the operation of this embodiment will be explained.

Two protrusions 1 formed on the guide angle 5
1 is fitted into a hole 4a formed in the earth spring 3 to form an integral body, and then the shield plate 1 is tightened and fixed to the left and right pair of shield plates 1 with two screws 8, respectively, via washers 7.

At this time, the screw 8 is attached to the screw 4 formed on the shield plate 1.
The guide angle 5 is inserted into the two holes 2b on the upper and lower end sides of the holes 2, and then passed through the two holes 4b formed at the corresponding positions of the earth spring 3.
Screw into the tap hole 6 and tighten and fix.

Further, a protrusion 11 protruding from the earth spring 3 is inserted into two intermediate holes 2a formed in the shield plate 1. A ground pattern 12 is formed on one side of two opposing ends of the substrate 9.
The guide angle 5 is inserted between the guide angle 5 and the earth spring 3 from the direction shown by arrow B, so that the guide angle 5 is parallel to the earth spring 3.

In this state, the guide angle 5 and the earth spring 3 are accurately positioned and fixed via the protrusion 11, so the distance D between the guide angle 5 and the earth spring 3 is determined with high precision. Here, the distance L between the center of the hole 4a formed in the earth spring 3 and the side surface of the guide angle 5 on the earth spring 3 side is:
Each is shaped to exactly the predetermined distance.

Therefore, if this distance D is appropriately designed, the sandwiched substrate 9 will receive an appropriate pressing force from the earth spring 3, and the earth spring 3 and the earth pattern 12 will be in reliable contact. Also earth spring 3
The position of contact with the ground pattern 12 can also be kept constant.

According to this embodiment, since the ground spring 3 and the guide angle 5, which have been precisely machined in advance, are fixed together through the protrusion 11, the board 9 can be properly pressed at a fixed position with a simple assembly operation. A ground pattern 12 formed on the substrate that can be clamped with pressure.
and the earth spring 3 can be brought into reliable contact with each other.

In the above embodiment, the number of holes 2, 4, and 6 is four, and the number of protrusions 11 is two, but these numbers are limited to four and two, respectively. isn't it.

Further, the shape of the guide angle 5 is not limited to an L-shaped angle, and may be of other shapes, such as a thick plate.

[Effects of the invention] As explained above, according to the substrate clamping structure according to the invention, the protrusion is formed on the guide member and the guide member is inserted into the hole of the spring member for positioning, thereby simplifying the assembly work. This can be done easily and simply, and the substrate can be held in the correct position with an appropriate pressing force.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing essential parts of an embodiment of the substrate holding structure according to the present invention, Fig. 2 is an exploded perspective view showing the assembly work of this embodiment, and Fig. 3 is a conventional substrate holding structure. FIG. 3 is a cross-sectional view showing the structure. 1... Shield plate, 2, 4, 6... Hole, 3...
...Earth spring as a spring member, 5...Guide angle (guiding member), 9...Substrate, 11...Protrusion, 12...Earth pattern.

Claims (1)

[Claims for Utility Model Registration] In a substrate sandwiching structure in which both sides of a substrate 9 are sandwiched between a spring member 3 and a guide member 5, which are each integrally screwed to the shield plate 1, a protrusion 11 is provided on the guide member. A substrate holding structure characterized in that the projections are positioned by being inserted into holes 2a and 4a formed in the shield plate and the spring member, respectively.