JPH0225249Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The invention involves inserting a terminal of an integrated circuit by inserting a ferrite bead made of small ring-shaped ferrite into a fitting hole made of an insulating material and provided in the same arrangement as the terminal. This invention relates to a ferrite bead mounting board.

Conventional technology Conventionally, in order to prevent noise induced from the outside into an integrated circuit or between terminals, a ferrite bead made of small ferrite shaped like a rework is attached to each terminal of an integrated circuit. It is mounted on a circuit board such as a printed circuit board, and the terminals and circuits are connected.

Problems that the invention aims to solve Conventionally, when ferrite beads are used to prevent electromagnetic induction noise, they are extremely small and difficult to handle because they penetrate into the narrowly spaced terminals of an integrated circuit. When attaching the ferrite beads to the circuit board with the ferrite beads attached, it is necessary to prevent the ferrite beads from falling off, resulting in a disadvantage that the work efficiency of penetrating attachment is poor.

Means for Solving the Problems The present invention eliminates such drawbacks of the conventional method, and provides a step-like ferrite bead insertion hole in an integrated circuit holding plate made of an insulating material in an arrangement equal to the terminal arrangement of an integrated circuit, and The present invention provides a ferrite bead mounting board characterized by preventing electromagnetic induction noise by providing a small hole extending from the stepped portion to the back surface of the holding plate and penetrating the terminal of the integrated circuit.

Function: Therefore, when a ferrite bead is inserted into the insertion hole of the holding plate, the ferrite bead is attached to the step in the insertion hole and is supported without falling off, and the terminals of the integrated circuit penetrate to the back surface of the holding plate. The terminals of each integrated circuit can be connected according to a predetermined circuit configuration. The ferrite beads prevent electromagnetic induction noise, thereby preventing malfunctions of the integrated circuit.

Embodiment As shown in FIG. 1, the embodiment of the ferrite bead mounting board of the present invention is slightly larger than the planar external dimensions of the integrated circuit 3, and has an array of terminals 5 on both sides equal to the terminals 5 of the integrated circuit 3. The holding plate 1 is made of an insulating material provided with a plurality of ferrite bead insertion holes 6. As shown in FIG. 2, the fitting hole 6 has a stepped portion 7 whose outer diameter is the outer diameter of the ferrite bead 2, and the insertion hole 8 for the terminal 5, which communicates with the back surface of the holding plate 1, passes through the stepped portion. has been done.

The ferrite beads 2 are attached to the holding plate 1 by applying an adhesive that remains elastic even when solidified to the outer circumferential surface and fitting them into the fitting holes 6. Since the ferrite bead 2 is supported by the step 7 in the insertion hole 6 and does not fall, the terminal 5 of the integrated circuit 3 is easily inserted through the insertion hole 8 and reaches the back surface of the holding plate 1, and the integrated circuit 3 is inserted into the holding plate 1. is held stably.

Further, FIG. 2 shows a sectional view of FIG. 1 when the ferrite bead mounting board according to the present invention is provided on the circuit board 4. Since the dimensions of the holding plate 1 are larger than the integrated circuit 3, the integrated circuit 3 is attached to the ferrite bead 2.
The circuit board 4 may be placed on the holding plate 1 on which the holding plate 1 is attached, and a double-sided adhesive tape may be placed on the underside of the holding plate 1 to bond the holding plate and the circuit board 4 to each other.

In order to shorten the length of the terminals of the integrated circuit 3 mounted on the holding plate 1, as shown in FIG. It can be placed on the surface.

Effects of the invention As described above, according to the invention, the ferrite beads 2 can be easily attached to the terminals 5 of the integrated circuit 3 by using the holding plate 1 of the same size as the integrated circuit 3, and automation is also easy. The induced noise is also reduced.

Therefore, since the ferrite beads 2 prevent electromagnetic induction noise, malfunctions of the integrated circuit can be prevented.

[Brief explanation of drawings]

Fig. 1 is an external perspective view showing an embodiment of the ferrite bead mounting board of the present invention together with an integrated circuit;
1 is a longitudinal sectional side view of the mounting board shown in FIG. 1 mounted on an integrated circuit board, and FIG. 3 is a longitudinal sectional view of another embodiment of the ferrite beads inserted into the through holes of the holding plate according to the present invention. In addition, 1... Holding plate, 2... Ferrite bead, 3... Integrated circuit, 4... Circuit board, 5... Terminal, 6... Fitting hole, 7... Step part, 8, 9... Terminal insertion. Hole.

Claims (1)

[Scope of utility model registration request] A plurality of insertion holes 6 for ferrite beads 2 having stepped portions 7 are provided in the integrated circuit holding plate 1 made of an insulating material in an arrangement equal to the arrangement of the terminals 5 of a plurality of integrated circuits, and the A ferrite bead mounting board characterized by preventing electromagnetic induction noise by providing an insertion hole 9 for the terminal 5 that communicates with the back surface of the holding plate 1.