JPS6084900A - Method of assembling shielding case - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method for assembling a shield gate used in a pre-vision receiver's FF (sub-tuner, etc.).

(b) Prior Art Conventionally, a method as shown in FIG. 1 has been adopted for storing and fixing a printed board in which high-frequency circuit components are incorporated in a total 1iJ+ frame forming a shield cane.

In FIG. 1, 12, fil is a metal frame, and the frame 1
On the side (1a) of 4\(1), there is a cable led out from the antenna terminal of the previsual receiver 1 request 1 field (cap: Q'e
Connector (2) and tuner Vl for multiple external connections
iAko (3) set it up. Cut-and-raised portions (1b) and protrusions 1ζ3 (1c) [see Fig. 2] are formed as appropriate on the frame (llO)lIil1 surface (1a), and these cut-and-raised portions (1b) and The protruding part (
1C) After temporarily fixing the one-C printed board (4), do half a half by hand: J'kl' [Soldering points are indicated by diagonal lines in ff (Fig. 1 C2)] Alternatively, after temporarily fixing the printed board (4) to the metal frame (1) as described above, soldering was performed using the g2-half-111 dipping method (2) as shown in FIG. In FIG. 2, parts that are the same as those in FIG.

By the way, when soldering is performed manually as described above, not only is productivity low because there are many soldering points, but also it is difficult to solder the metal frame (11) and the metal foil (not shown) of the printed board (4). Therefore, a large-capacity soldering iron is required, and if tip-shaped parts are used for the parts to be assembled into the printed circuit board (4), the heat applied during soldering can sometimes cause the tip-shaped parts to break. It is necessary to heat (preheat) the parts in advance to prevent this from happening.

The solder dipping method eliminates the disadvantage of manual work≦2, but since the metal frame (11) is immersed in the molten solder (6) of the solder dedubbing tank (5), the molten solder (6) is absorbed by the metal frame ( For this reason, as shown in FIG. 6, when the open end (1d) of the metal frame ill is covered with a metal cover (71), The elastic claw piece (7a) and the side surface (1a) of the metal frame (11)
) has the disadvantage of poor contact with the cover, and noise caused by the cover. In addition, the conventional method required temporary fixing of the printed board (4), resulting in poor productivity.

OBJECT OF THE INVENTION The object of the present invention is to provide an efficient method for assembling a closed case so that the above-mentioned disadvantages do not occur.

(B) Structure of the Invention The present invention includes integrally forming a plurality of projecting pieces on at least one opening end of the metal frame, and forming a 1'Cv force groove along the opening 9if5 outside the metal frame. By providing a through hole through which the protruding piece is extended into the force groove, and by extending the protruding piece into the through hole, the protruding piece is pushed out from the printed board. <'? provided on the printed board. The printed board was then divided by the v') JF iI4 to remove the part 11 that protruded from the metal frame.

This is a method for assembling a shield case in which the protruding pieces (i'+il) are placed on the inner surface (two metal plates so that they are in contact with each other), and four covers are applied to the one open end.

&14 Embodiment A method C for assembling a shield case according to the present invention will be explained with reference to FIGS.

Figure 24I4 shows the dangerous quota (8), and the quota (8)
) is provided with a connector (2) and a tuner terminal (31) for external connection, and a metal partition wall (9) is provided as needed.Then, the metal frame A plurality of protrusions (tω) are integrally formed on the open DJ (8b) of the I/Nt 81. In this embodiment, protrusions (Il+) are also formed on the partition wall (9).

On the other hand, as shown in Fig. 5, the printed board ([21]
1) v cart/j along opening yRr+ (8b)
5 (131 (m) In Figure 5, a CV force groove (131 is a printed board (formed in the circle of 12, so it is shown with a broken line) is provided.Next), the V force groove 11ηαQ was applied. The opening Ljyiia (8b) of the metal frame 18)
) is provided with a through hole (14) through which the protruding piece ulj provided on the Cjail partition wall (9) is inserted, and a through hole 09 through which the protruding piece αB provided on the Cjail partition wall (9) is inserted is provided.

i'+i] The printed temporary IIA includes the circuit components to be mounted on it: ``In addition to the conductor pattern (not shown) formed as one electrical connection, the metal frame (8) and the printed wiring board'' jljf+
The metal foil (Iblαn (f in Figure 5) necessary for bonding with 21
The hatched part] is the through hole (141 (151
62゛] is formed near the metal frame (8).
The metal foil (I
Regarding Q, ゛[is like a boat in Figure 5, vka・y)71'・
t(J2' of the print υ11121 provided within the range uJl in 131 and then processed with the v-roku process above)!
i hole (14) (151 ni'f: tL 'C t I
fJX frame (81 (1) each protrusion 11111 (I o
? As shown in Figure 6, the protruding piece 11 (lα1) is made to protrude from the side where the gold 1114 foil flfii (17) is formed. Assemble.

The semi-finished product assembled in this way was immersed in the molten solder in the semi-111 dipping tank while holding the edge of the printed board (121). Solder 1 is applied to the metal foil +11i1T17) and the protruding piece 1118+I.
11 is attached with half LLI.

The printed board (12 is fixed to the 6-piece frame (8).J
< is.

After that, press the printed board (I side) to nu jr+4.
The metal frame (
8) Delete the part that protrudes from.

Then, as shown in FIG. 7, the side surface (
8a) is provided with a rear cover α opening having an advantageous property and having a plurality of elastic claw pieces (18a) that engage with the opening. At this time, print (anti(1)
1j hole (141 (151) protruding from the piece (101
By fitting αυ to the bottom (18b) of the inner surface of the nine cover f181, the elastic claw piece (IF
The locking position of la) is determined. Incidentally, if necessary, the cover (181+''-claw piece (18a) provided → &1 is provided so as to be located between the protruding pieces (1B).

In this way, the back cover ttS can be attached smoothly. In addition, -'V-h-yl・i'ff1 day t'J) cross section is the back cover (18117 iiQ 1 narrowing (
18c) to prevent contact with al 7[;A
It is preferable that the side wall (13c) swells slightly outward as shown in 1-2.

This C< *? The other opening end of the IE IfiS frame (8) is also provided with a front cover (11) having a plurality of claw pieces (19n), and is completed as a Ludogesu.

In addition, in the i-2 embodiment, \1-hlt11:ζ(131
As shown in Figure 18, the printed board +12 is formed in advance to match the width of one side of the metal frame (8), and the printed board +12 is formed to match the width of the other side of the metal frame (8). Two kite grooves A3 are provided along the line, and after soldering is completed, the V force V)
Divide the printed board α2 by 7/lαJ, and divide the printed board [
121 may be removed.

(f) Effects of the Invention According to the method for assembling a shield case of the present invention, there is no need to temporarily fix the printed board to the metal frame, and productivity is improved.

In addition, even though half-II attachment is performed using the solder dipping method, half-1"1 does not adhere to the side surface of the metal frame, so there is no contact failure between the full-bending cover and the metal frame as in the conventional case. Therefore, the present invention is very useful as it can avoid the inconvenience caused by poor contact.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the main parts of a shield case assembled by the conventional method, Figure 2 is a diagram showing the conventional assembly method, and Figure 3 is a plan view of the shield case assembled by the conventional method. FIG. 4 and 5 are plan views of parts used in the present invention, respectively;
FIG. 6 is a diagram for explaining the assembly method in the present invention,
FIG. 7 shows a case assembled by method C2 of the present invention, and FIG. 8 is a diagram for explaining another embodiment. (8)...Gold jtA frame, (8b)...Opening end, (
101... Projection piece, (L2-... Printed board, (131
...V kite groove. a...through hole, α6)...metal foil, a...back cover. Figure 2 Figure 8 Figure 5

Claims (1)

[Claims] (1) A small metal frame (a plurality of protrusions are integrally formed at one opening end, and a frame is formed along the opening end of the metal frame on the printed board) i: Q is provided, and the V A through-hole is provided through which the protruding piece is inserted into the force-fitting groove, and the protruding piece protrudes from the printed board by inserting the protruding piece into the through-hole, and a metal foil provided on the printed board. and half ll 3 (combined by 2. Then the said printed board) ii J.
Divide by G ℃ Delete the part protruding from the metal frame,
i) A method for assembling a shield cane, in which a metal cover is applied to one of the open ends so that the protrusions mentioned above are in contact with the inner surface (two sides).