JP2574913Y2 - Circuit board fastening mechanism - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit board fastening mechanism, and more particularly, to a circuit board fastening mechanism for fastening a circuit board having a through hole formed therein to a board support.

[0002]

2. Description of the Related Art A conventional circuit board fastening mechanism shown in FIG.
This is for fastening a circuit board 20 having a circuit pattern and the like to a plate-like substrate support 21. The fastening mechanism includes a disk-shaped receiving metal member 22 disposed on surfaces of the circuit board 20 and the substrate support 21 that are separated from each other;
Bolt 23 penetrating substrate support 21 and receiving fitting 22
And a nut 24 screwed to the tip of the bolt 23.

[0003]

In the above-described conventional circuit board fastening mechanism, the fastened circuit board 20 and the board support 2 are fastened.
A bolt 23 and a nut 24 protrude from the surface of the first member 1. Therefore, in this conventional configuration, the entire height of the fastened circuit board 20 and the board support 21 is substantially increased. Further, in this configuration, there is a case where surface mounting becomes impossible due to the protruding fastening member.

An object of the present invention is to prevent a fastening member from projecting.

[0005]

SUMMARY OF THE INVENTION The present invention provides a circuit board fastening mechanism for fastening a circuit board having a through hole to a board support having a through hole by a fastening member comprising a bolt and a nut. A receiving member consisting of a bottomed tubular body having a bolt hole formed at the bottom and a flange formed outwardly of one end opening of the tubular body is connected to each through hole of the circuit board and the substrate support. On both sides, the bolt holes at the bottom of each receiving member are arranged so as to face each other, and a bolt is inserted into the pair of bottom bolt holes facing each other, and the tip is fastened with a nut. A circuit board fastening mechanism, wherein the bolts and the nuts are respectively arranged in the cylindrical body and the circuit board is fastened and fixed to a board support.

[0006]

In the circuit board fastening mechanism according to the present invention, the tubular body of the receiving member is inserted into the through holes of the circuit board and the board support,
The circuit board and the board support are fastened by inserting a fastening member consisting of a bolt and a nut into the receiving member. Here, since the fastening member is in a state of being inserted into the receiving member, the fastening member does not protrude.

[0007]

1 and 2 show an electronic component assembly to which an embodiment of the present invention is applied. This electronic component assembly includes a substrate support 1 which is a part of a conductive case, a circuit board 5 on which a circuit pattern 2 is formed and an electronic component 4 is mounted, a substrate support 1 and a circuit board. 4 and a fastening mechanism 6 for fastening the same. The substrate support 1
A solder layer 7 is interposed between the semiconductor device and the circuit board 5.

The circuit board 5 is made of glass ceramic, and has a through-hole 5a at a position corresponding to the board fastening position. At positions corresponding to the through holes 5a of the circuit board 5, through holes 1a and 7a are formed in the substrate support 1 and the solder layer 7, respectively. Note that, on the surface of the circuit board 5, the ground pattern of the circuit pattern 2 extends around the periphery of the through hole 5a.

Each fastening mechanism 6 includes a first receiving member 8 inserted into the through hole 5a from the upper side in the figure, a second receiving member 9 inserted into the through hole 1a from the lower side in the figure, and both receiving members 8, 9 There is provided a fastening member including a bolt 10 and a nut 11 for connecting between them. Both receiving members 8 and 9 have the same shape, and have a flange 13 formed outwardly around the opening of a bottomed tubular body (hereinafter simply referred to as a tubular portion) 12 that can be inserted into the through holes 1a and 5a. Have. A bolt hole 15 is formed in the bottom of the cylindrical portion 12. Therefore, the cylindrical portion 12
An outward flange 13 is formed around the opening on the outer side, and an inward flange 14 forming a bottom is formed inside the cylindrical portion 12.

The cylindrical portion 12 has an outer diameter slightly smaller than the inner diameter of the through holes 1a, 5a. The cylindrical portion 12
Is set larger than the outer diameters of the head 10a of the bolt 10 and the nut 11. Outward flange 13
Has a larger outer diameter than the through-holes 1a and 5a. Further, the outward flange 13 has a protrusion 13 a protruding toward the surface of the substrate support 1 and the circuit board 5. Protrusion 13a
Is formed by cutting and raising the outward flange 13. Also, four protrusions 13a are formed at equal intervals in the circumferential direction of the annular outward flange 13.

The inward flange 14 forming the bottom of the cylindrical portion 12 has a bolt hole 15. The diameter of the hole 15 is set so that the bolt 10 can be inserted.
The outer diameter of the head 10 a of the bolt 10 and the outer diameter of the nut 11 are set smaller. Next, an assembling process of the above embodiment will be described.

First, the circuit board 5 is superimposed on the board support 1 via the solder layer 7. And the fastening mechanism 6
Is inserted into the through hole 5a of the circuit board 5,
The second receiving member 9 is inserted into the through hole 1a of the substrate support 1. Next, the bolt 10 is inserted into the bolt hole 15 at the bottom of the first receiving member 8 and the bolt hole 15 at the bottom of the second receiving member 9, and the bolt 10 and the nut 11 are used in the through holes 1a, 5a, 7a. To tighten both receiving members 8 and 9. As a result, the bolt 10 and the nut 11 are
, The substrate support 1 and the circuit board 5 are integrally fastened.

Here, since the head 10a of the bolt 10 is disposed in the cylindrical portion 12 of the first receiving member 8, and the nut 11 is disposed in the cylindrical portion 12 of the second receiving member 9, the fastening mechanism 6 Does not protrude from the surfaces of the substrate support 1 and the circuit board 5. As a result, the problem that the fastening mechanism 6 substantially increases the height of the electronic component assembly is solved, and the problem that the fastening mechanism 6 becomes an obstacle during surface mounting is also solved.

When the fastening mechanism 6 fastens the substrate support 1 and the circuit board 5, the circuit pattern 2 is electrically connected to the substrate support 1 via the fastening mechanism 6. That is, the fastening mechanism 6 also has a function of electrically connecting the circuit pattern 2 on the surface of the circuit board 5 and the substrate support 1. Further, the cylindrical portion 12 of the receiving member into which the nut is inserted.
By changing the internal shape of the nut, the nut may be stopped.

[0015]

The circuit board fastening mechanism according to the present invention includes the receiving member having the cylindrical portion and the fastening member inserted into the receiving member, so that the fastening member does not protrude.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an electronic component assembly in which one embodiment of the present invention is adopted.

FIG. 2 is an exploded perspective partial view thereof.

FIG. 3 is a diagram corresponding to FIG. 1 of a conventional example.

[Description of Signs] 1 Board support 1a, 5a Through hole 5 Circuit board 6 Fastening mechanism 8, 9 Receiving member 10 Bolt 11 Nut 12 Cylindrical part 13 Outward flange 14 Inward flange

──────────────────────────────────────────────────続 き Continuing on the front page (72) Shigeo Nakamura 1-1, Yamashita-cho, Kokubu-shi, Kagoshima Inside Kyocera Kokubu Plant (72) Yasuto Fujii 1-1, Yamashita-cho, Kokubu-shi, Kagoshima Kyocera Inside Kagoshima Kokubu Plant (72) Inventor Shogo Tanaka 1-1 Yamashita-cho, Kokubu City, Kagoshima Prefecture Kyocera Corporation Inside Kagoshima Kokubu Plant (56) References Japanese Utility Model Sho 63-38393 (JP, U) 4-25281 (JP, U) Hikaru 1-36719 (JP, U) (58) Fields surveyed (Int. Cl. ⁶ , DB name) H05K 7/14 H05K 7/12

Claims (1)

(57) [Scope of request for utility model registration] 1. A circuit board in which a through- hole is formed is connected to a through-hole.
Bolts and nuts on the substrate support
In the circuit board fastening mechanism for fastening fixed by binding members consists of a bottomed cylindrical body bolt holes are formed in the bottom, a flange formed outwardly of one end opening of the tubular body <br / > Receiving member , the through hole of each of the circuit board and the substrate support
Bolt holes at the bottom of each receiving member
They are arranged so as to face each other, and
Insert a bolt through the bottom bolt holes of the pair, and
The bolts and nuts are connected to each other by fastening
Fasten the circuit board to the board support by arranging it in the cylindrical body
A circuit board fastening mechanism fixed .