KR101268088B1 - Clip for fixing shield case for shielding emi and shield apparatus using the same - Google Patents

Abstract

PURPOSE: A clip for affixing an EMI(electromagnetic interference) shielding case and an EMI shielding device using the same are provided to offer a clip having a simple terminal structure for easily inserting a shield case into the clip. CONSTITUTION: A connection part(130) is bent at an angle corresponding to an edge of an EMI shielding case. At least one pair of clips(110) is connected to each other by the connection part. The connection part is formed to be integrated with the clips. The width of the connection part is equal to or smaller than the width of a ground pattern in a printed circuit board. Terminals of the clips are symmetrical to the bent position of the connection part. The bottom edge of a side wall of the EMI shielding case is inserted into the clips.

Description

Clip for fixing electromagnetic shielding case and electromagnetic shielding device applying the same {CLIP FOR FIXING SHIELD CASE FOR SHIELDING EMI AND SHIELD APPARATUS USING THE SAME}

The present invention relates to a clip for fixing the electromagnetic wave shielding case, and more particularly, to a clip for fixing the corners of the electromagnetic wave shielding case, and moreover relates to an electromagnetic shielding device integrally manufactured by inserting a clip in the corner of the electromagnetic wave shielding case.

The present invention also relates to a clip packaged on a reel and capable of surface mounting by vacuum pick-up and reflow soldering by solder cream and an electromagnetic shielding device employing the same.

Recently, electronic devices and information communication devices are affected by heat, static electricity, and electromagnetic waves as they become high frequency, miniaturized, and integrated. Therefore, in order to prevent electromagnetic waves generated from these high frequency electronic components or modules from being sent to the outside and to protect these high frequency components or modules from externally generated electromagnetic waves, the high frequency components or modules are covered with an electromagnetic shielding case, and then electromagnetic waves. The shielding case is electrically and mechanically connected to the ground pattern of the printed circuit board to shield the high frequency components or modules.

The electromagnetic shielding case is formed of an electrically conductive material such as a metal sheet for shielding electromagnetic waves, and has a box shape having at least one surface open to cover electronic components or modules mounted on a printed circuit board.

As such, the electromagnetic shielding case is mounted on the ground pattern of the printed circuit board. Preferably, the electromagnetic shielding case should be detachable from the ground pattern of the printed circuit board to easily repair the electronic component or module mounted therein.

Conventionally, a metal sheet such as stainless steel is pressed and bent continuously using a press to manufacture an electromagnetic shielding case, and then a tin, etc., which is solderable, is plated, and the lower ends of the electromagnetic shielding case are printed circuit boards. It is mounted on the ground pattern of the solder and soldered to the ground pattern, or by inserting the bottom side of the side wall of the shielding case into a metal clip (soldered in advance) on the ground pattern.

Solderable metal clips have been proposed in various structures, but commonly have a structure including a fixing portion in contact with the ground pattern of the printed circuit board, and an elastic piece standing upright at both edges in the width direction of the fixing portion.

However, the conventional metal clip has a problem that the alignment margin of the clip is very small when the bottom of the side wall of the shielding case is fitted to the clip is made of all straight. In other words, when the shielding case is fitted to the clip, it is difficult to insert because it must be aligned with the side wall of the clip forming a straight line.

In addition, since the straight metal clip is simply inserted into the side wall of the shielding case, the coupling force between the metal clip and the shielding case is small, and to reinforce it, a large number of metal clips must be used.

In addition, when the shielding case is manufactured by a press process by cutting and bending, a gap is generated with the edges of the shielding case cut off. If the shielding case is repeatedly attached or detached, the gap is widened, and electromagnetic shielding is reduced. do.

In order to solve such a problem, Japanese Laid-Open Patent Publication No. 2011-198839 discloses a clip terminal for positioning and holding a shield case, which is arranged to approach the side surface of the shield case from the outside, and the shield case at the corner of the shield case. Disclosed is a clip terminal having a sidewall on which a bent portion having an L-shaped bent shape is formed along a side surface thereof.

However, according to this clip terminal, it is complicated to manufacture because the L-shaped bent portion must be formed, and in particular, the L-shaped bent portion has a different shape and dimensions of the pair of clips based on the suction surface, thereby reflowing. There is a drawback that the shaking during soldering is so large that it may not be mounted in the desired position on the solder cream having a very low viscosity.

In addition, there is a problem that the adsorption surface is formed much larger than the width of the plate of the clip, and consequently occupies a large area on the printed circuit board on which the clip terminal is mounted, which is not suitable for current electronic devices requiring high density mounting.

Accordingly, an object of the present invention is to provide a clip terminal which is easy to fit the shielding case and minimizes the mounting area on the printed circuit board.

Another object of the present invention is to provide a clip terminal having a simple structure.

Another object of the present invention is to provide a clip terminal with less shaking during reflow soldering by having the same shape and dimensions with respect to the bent connection.

Another object of the present invention is to provide a clip terminal capable of keeping the electromagnetic shielding effect of the shielding case constant by preventing the gap of the shielding case from further opening when inserting and detaching the shielding case into the clip terminal.

Another object of the present invention is to provide an electromagnetic shielding device capable of surface mounting by vacuum pick-up and reflow soldering by solder cream on a ground pattern of a circuit board.

Another object of the present invention is to provide an electromagnetic shielding device having a strong coupling force with a shielding case while using a small number of clip terminals.

The above object is, the soldering is mounted to the ground pattern of the printed circuit board, the connection portion bent at an angle corresponding to the edge of the electromagnetic shielding case; And at least one pair of clips connected to each other by the connecting portion, wherein the connecting portion and the clip are integrally formed, and at least the width of the connecting portion is smaller than or equal to the width of the ground pattern, and the sidewall of the electromagnetic shielding case. The lower edge is achieved by the clip terminal for fixing the electromagnetic shielding case fitted to the clip.

Preferably, the clip terminals are symmetrical with respect to the bent position of the connection part.

Preferably, a flat vacuum pick-up area is formed on the surface of the connection part.

Preferably, each of the clips, the fixing portion to be soldered to the ground pattern, and the integral portion protrudes from both sides in the width direction of the fixing portion is made of an elastic piece corresponding to each other, the distance between the outer surface of the elastic piece is the ground pattern Is less than or equal to the width of.

Preferably, the elastic pieces located on the inner side and the elastic pieces located on the outer side of the corresponding elastic pieces are different from each other in height.

Preferably, the outer edge of the connecting portion is chamfered to form a chamfer.

Preferably, the outer edge of the connecting portion is chamfered to form a chamfered portion, the protrusion integrally formed on the chamfered portion protrudes perpendicular to the surface of the connecting portion.

Preferably, the outer edge of the connecting portion is rounded, more preferably, a projection integrally formed along the rounded portion protrudes perpendicularly to the surface of the connecting portion.

Preferably, the protrusions are separated from each other at an intermediate position of the rounded portion.

Preferably, slits are formed at a constant length at both ends in the width direction at a boundary between the clips and the connection part.

Preferably, the clips are symmetrical with respect to the bent position.

Preferably, the end of each clip is further formed with an auxiliary fixing part soldered to the ground pattern.

Preferably, the electromagnetic shielding case is not soldered with solder.

Preferably, the edge of the vehicle shielding case is vertically cut to form a gap between the side walls.

Preferably, the clip terminal is reel taped and soldered by a surface mount process.

The above object, the electromagnetic shielding case; And a clip terminal including a connection part bent at an angle corresponding to an edge of the electromagnetic shielding case and at least one pair of clips connected to each other by the connection part, wherein the connection part and the clip are integrally formed, and at least the connection part The width is narrower than or equal to the width of the ground pattern of the printed circuit board to which the clip terminal is soldered, and the bottom edge of the sidewall edge of the electromagnetic shielding case is achieved by the electromagnetic shielding device fitted to the clip.

Preferably, a clip receiving groove for accommodating the clip is formed at a lower end of the side wall edge of the shielding case corresponding to the edge.

Preferably, the electromagnetic shielding device is supplied by reel taping and the clip terminal is soldered to the ground pattern by a surface mounting process.

Preferably, the electromagnetic shielding case is not soldered with solder.

Preferably, the edge of the electromagnetic shielding case is vertically cut to form a gap between the side walls.

According to the above structure, the clip terminal has the advantage that the structure is simple and easy to fit the shielding case, at least the width of the connecting portion is formed to be equal to or less than the width of the ground pattern of the printed circuit board printed It has an advantage that high density mounting can be performed by occupying a small area on the circuit board.

In addition, the same shape and dimensions as the reference to the bent portion of the connection to each other symmetrical to each other to reduce the phenomena during reflow soldering has the advantage that it is easy to reflow soldering in the desired position.

In addition, by firmly supporting the cut-out side wall edge of the shielding case using projections formed at the connecting portion, the gap of the shielding case is prevented from being widened when inserting and detaching the shielding case into the clip terminal, thereby preventing the electromagnetic shielding effect of the shielding case. Let's do it.

In addition, it is possible to provide an electromagnetic shielding device capable of surface mounting by vacuum pick-up and reflow soldering by solder cream on a ground pattern of a circuit board.

In addition, it is possible to provide an electromagnetic shielding device having a strong coupling force with the shielding case while using a small number of clip terminals.

1 is a perspective view showing a clip terminal according to an embodiment of the present invention.
2 is a plan view and a bottom view showing a clip terminal according to an embodiment of the present invention.
3 (a) and 3 (b) show a state in which the electromagnetic shielding case is fixed by mounting the clip terminal of FIG. 1 to a ground pattern.
4 illustrates a clip terminal 200 according to another embodiment of the present invention. FIG. 4 (a) is a perspective view, FIG. 4 (b) is a cross-sectional view taken along AA, and FIG. 4 (c) is a view of FIG. 4. It is sectional drawing which shows the case opposite to (b).
5 to 9 each show a clip terminal according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a clip terminal according to an embodiment of the present invention, Figure 2 is a plan view and a bottom view, Figure 3 (a) and (b) is a clip terminal of Figure 1 mounted on a ground pattern to shield electromagnetic waves The case is fixed.

Clip terminal 100 according to an embodiment of the present invention as long as it is integrally formed at both ends of the connection portion 130 and the connection portion bent at an angle, for example 90 degrees corresponding to the corner of the electromagnetic shielding case 10 A pair of clips 110 may be included. Optionally, an auxiliary fixing part 120 may be formed at the end of the clip 110.

The width of the connection portion 130 is formed to be equal to or smaller than the width of the ground pattern 20 of the printed circuit board, preferably the width of the auxiliary fixing part 120 and the width of the clip 110 is also the ground of the printed circuit board. It is formed to be equal to or smaller than the width of the pattern 20.

According to such a structure, there is an advantage that the structure is simple and the shielding case can be easily fitted, and that the high density mounting of other components on the printed circuit board can take place by occupying a small area on the printed circuit board on which the clip terminal is mounted.

Preferably, since the clip terminal 100 has the same shape and dimensions with respect to the bent portion of the connecting portion 130, there is less shaking during reflow soldering, and as a result, reflow soldering is easily performed at a desired position.

In FIG. 1, the case in which one clip 110 is formed in each direction is exemplified. Alternatively, a plurality of clips 110 may be adjacent to each other. In addition, the length and shape of the clip 110 may be the same left or right or different.

Each clip 110 includes a fixing part 115 soldered to the ground pattern 20 of the printed circuit board and a supporting part 112 supporting the shielding case 10, and the supporting part 112 is the fixing part 115. It consists of a pair of elastic pieces (114, 116) protruding integrally from both sides in the width direction.

The length of the connecting portion 130 can be arbitrarily adjusted, and a flat vacuum pick-up area is formed on the surface thereof, for example, is manufactured to be bent at 90 degrees.

Referring to FIG. 2, the slit 111 is formed at a constant length at both ends in the width direction at a boundary between each clip 110 and the connection part 130 and the auxiliary fixing part 120, so that the outer side of the elastic pieces 114 and 116 is formed. The distance between the sides may be equal to the width of the connector 130 or the auxiliary fixing part 120.

Here, the slit 111 is formed to facilitate the lifting of the clip 110, but the present invention is not limited thereto.

The back surface of the clip terminal 100 together with the back surface of the connecting portion 130 and the auxiliary fixing part 120 is soldered to the ground pattern 20 of the printed circuit board, and the clip 110 as described later to prevent lead rise phenomenon. The back surface of the substrate may have a shape spaced apart from the ground pattern 20 of the printed circuit board, or both edges of the bottom of the clip (102, 104) is lifted up, if necessary, by applying a lead-resistant ink or laser I can process it.

In addition, the clip terminals 100 may be formed to be symmetrical with respect to the bending position of the connection unit 130.

The clip terminal 100 may be manufactured by pressing a metal such as stainless steel and then plating a solder cream and solderable tin.

Preferably, the clip terminal 100 is reel wrapped in a carrier and reflow soldered by surface mount technology (SMT).

According to this structure, the vacuum pick-up region of the connecting portion 130 can be picked up using a pickup device and supplied onto the solder cream formed on the ground pattern 20 of the printed circuit board for reflow soldering.

In FIG. 1, the elastic pieces 114 and 116 form a structure in which the elastic pieces 114 and 116 are opposed to each other, but alternatively, the elastic pieces 114 and 116 may protrude to cross each other.

In addition, the pair of elastic pieces 114 and 116 may be provided with other elastic means such as protrusions projecting inward by embossing or incision in order to improve elasticity.

Referring to FIG. 3, in the state in which the fixing part 115 of each clip 110 and the connecting part 130 connecting the clip 110 and the auxiliary fixing part 120 are soldered to the ground pattern 20 of the printed circuit board. The bottom edge of the electromagnetic shielding case 10 is sandwiched between the elastic pieces 114 and 116 of the clip 110 to be fixed.

The clip receiving groove 12 may be formed at the lower end of the side wall edge of the electromagnetic shielding case 10 so that the lower end of the side wall of the electromagnetic shielding case 10 may be in close contact with the ground pattern 20.

Preferably, the electromagnetic shielding case 10 in which the clip terminal 100 is inserted is mounted on a ground pattern by surface mount technology (SMT) by being supplied in a reel package or a tray, and then the rear surface of the clip terminal 100 is Reflow soldering is performed on the ground pattern 20 of the printed circuit board.

Preferably, the shielding case 10 is manufactured by pressing a stainless steel plate to prevent reflow soldering by solder cream, and a gap may be formed by vertically cutting the edge of the sidewall.

4 illustrates a clip terminal 200 according to another embodiment of the present invention. FIG. 4 (a) is a perspective view, FIG. 4 (b) is a cross-sectional view taken along AA, and FIG. 4 (c) is a view of FIG. 4. It is sectional drawing which shows the case opposite to (b).

According to this embodiment, the back surface of the clip 210 is separated from the ground pattern 20 so that the gap 218 is formed between the auxiliary fixing part 220 and the clip 210 and between the connecting portion 230 and the clip 210. The inclined portion 222 may be formed. Therefore, the portion soldered to the ground pattern 20 becomes the back surface of the connection portion 230 and the back surface of the auxiliary fixing part 220.

In addition, as shown in FIG. 4B, the height of the elastic piece 214 located on the inner side of the opposite elastic pieces 214 and 216 of each clip 210 is equal to t than the height of the elastic piece 216 located on the outside. Formed low.

As shown in FIG. 1, slits are formed at a predetermined length at both ends of the width direction at the boundary formed by the respective clips 210 and the inclined portions 222 so that the elastic pieces 114 and 116 are easily bent up, and the elastic pieces 114 and 116 are formed. The distance between the outer surface of the can be equal to the width of the connecting portion 130 or the auxiliary fixing portion 120.

According to this structure, even if the electromagnetic shielding case 10 is lowered outwardly based on the position between the elastic pieces 214 and 216, the lower end of the side wall of the shielding case 10 is first caught by the outer high elastic piece 218. It slides along the surface of the elastic piece 216 and is inserted smoothly.

On the contrary, as shown in FIG. 4C, the height of the inner elastic piece 214 may be higher than the height of the outer elastic piece 216.

According to such a structure, when the electromagnetic shielding case 10 for coupling falls down obliquely, the lower end of the side wall of the shielding case 10 is caught by the inner elastic piece 214, and thus the elastic piece 214 serves as a guide. It slides along the surface of the piece 214 and is inserted smoothly.

5 to 9 illustrate clip terminals according to another embodiment of the present invention.

In the following embodiments, a detailed description of the same configuration as the above embodiment will be omitted, and only other configurations will be described.

Referring to FIG. 5, the chamfer 332 is formed by chamfering the outer edge of the connection part 330.

The clip terminal is manufactured by a press, which includes cutting a thin steel strip. In the cutting process, the edges of the connecting portion 330 are formed by two cuttings in directions A and B orthogonal to each other as shown by arrows. In the portion indicated by a circle, portions where a strip exists and portions that do not exist are cut at once. do. Thus, the portion where no strip is present forms a burr that is pushed toward the back side of the strip as the side wall of the strip peels off during cutting.

Therefore, this surface becomes a problem because the back surface of the connection portion 330 is not flat when the surface is mounted, and reflow soldering is not reliably performed.

In order to solve this problem, it is possible to minimize the occurrence of the burr by cutting the outer edge of the connecting portion 330 inclined at once.

In addition, when chamfering the outer edge of the connection portion 330 is easy to manufacture the back surface of the clip terminal in a reliable plane, the shaking phenomenon during the reflow soldering is small.

Referring to FIG. 6, the protrusion 432 protrudes perpendicular to the surface of the connection part 430 across the outer edge of the connection part 430.

Edges of the electromagnetic shielding case 10 may be vertically cut according to a manufacturing method to form a gap between the sidewalls. In this case, if the projections 432 crossing the edges are formed as shown in FIG. 6, the gap of the electromagnetic shielding case 10 may be narrowed while the edges of the electromagnetic shielding case 10 are pressed by the protrusions 432, resulting in leakage of electromagnetic waves. Can be prevented.

In addition, when the shielding case 10 is inserted into and separated from the clip terminal several times, a gap formed between the sidewalls of the shielding case 10 may be prevented from opening to provide a constant electromagnetic shielding effect.

Referring to FIG. 7, the outer edge of the connecting portion 530 is rounded, and the outer edge of the connecting portion 630 is rounded in FIG. 8, and the protrusion 632 protrudes perpendicularly to the surface of the connecting portion 630. Since the functions according to the embodiments of FIGS. 7 and 8 are the same as the functions of the embodiments of FIGS. 6 and 7, the description thereof will be omitted.

9, projections 731 and 732 protrude perpendicularly to the surface of the connection portion 730 in a round shape at the outer edge of the connection portion 730, each projection 731 and 732 being formed at an intermediate position of the rounded portion. It is formed separately. According to such a structure, manufacturing is easy and the elasticity of the projections 731 and 732 itself is improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Accordingly, the scope of the present invention should not be construed as being limited to the embodiments described above, but should be construed in accordance with the following claims.

10: Case
12: Clip acceptance groove
20: grounding pattern
100, 200: clip terminal
110: clip
114, 116: elastic piece
115: fixed part
130, 230, 330, 430, 530, 630, 730: connections

Claims (21)

In the clip terminal soldered to the ground pattern of the printed circuit board and mounted,
A connection bent at an angle corresponding to an edge of the electromagnetic shielding case; And
At least one pair of clips connected to each other by said connecting portion,
The connecting portion and the clip are integrally formed, at least the width of the connecting portion is smaller than or equal to the width of the ground pattern,
The clip terminals are symmetrical with respect to the bent position of the connection part,
Clip terminal for fixing the electromagnetic shielding case, characterized in that the lower edge of the side wall edge of the electromagnetic shielding case is fitted to the clip. delete The method according to claim 1,
Clip terminal for fixing the electromagnetic shielding case, characterized in that the flat vacuum pickup area is formed on the surface of the connecting portion. The method according to claim 1,
Each clip is made of a fixing portion soldered to the ground pattern, and the elastic pieces corresponding to each other protruding integrally from both sides in the width direction of the fixing portion,
Clip terminal for fixing the electromagnetic shielding case, characterized in that the distance between the outer surface of the elastic piece is less than or equal to the width of the ground pattern. The method of claim 4,
Clip terminal for fixing the electromagnetic shielding case, characterized in that the elastic piece located on the inner side and the elastic piece located on the outer side of the corresponding elastic piece is different from each other. The method according to claim 1,
The outer edge of the connection portion is chamfered clip terminal for electromagnetic shielding, characterized in that the chamfer formed. The method according to claim 1,
The outer edge of the connecting portion is chamfered to form a chamfered portion, the clip terminal for fixing the electromagnetic shielding case characterized in that the protrusions integrally projected perpendicular to the surface of the connecting portion integrally with the chamfered portion. The method according to claim 1,
Clip terminal for fixing the electromagnetic shielding case characterized in that the outer edge of the connection is rounded. The method according to claim 1,
The outer edge of the connecting portion is rounded, and the clip terminal for fixing the electromagnetic shielding case, characterized in that the projection integrally protruded perpendicular to the surface of the connecting portion integrally along the rounded portion. The method according to claim 9,
And the protrusions are separated from each other at an intermediate position of the rounded portion. The method according to claim 1,
Clips for fixing the electromagnetic shielding case, characterized in that the slit is formed at a constant length at both ends of the width direction at the boundary between each clip and the connecting portion. The method according to claim 1,
The clip terminal for fixing the electromagnetic shielding case, characterized in that the clip is symmetrical with respect to the bent position. The method according to claim 1,
Clip ends for fixing the electromagnetic shielding case, characterized in that the auxiliary fixing portion is further formed at the end of each clip soldered to the ground pattern. The method according to claim 1,
The electromagnetic shielding case is a terminal for fixing the electromagnetic shielding shield, characterized in that not soldered with solder. The method according to claim 1,
The edge of the electromagnetic shielding case is vertically cut clip terminal for fixing the electromagnetic shielding, characterized in that the gap formed between the side wall. The method according to claim 1,
The clip terminal is a reel taped clip terminal for fixing the electromagnetic shielding case, characterized in that soldered by a surface mount process. Electromagnetic shielding case; And
A clip terminal including a connection part bent at an angle corresponding to an edge of the electromagnetic shielding case and at least one pair of clips connected to each other by the connection part,
The connecting portion and the clip are integrally formed, and at least the width of the connecting portion is smaller than or equal to the width of the ground pattern of the printed circuit board on which the clip terminal is soldered.
The clip terminals are symmetrical with respect to the bent position of the connection part,
Electromagnetic shielding device characterized in that the lower edge of the side wall of the electromagnetic shielding case is fitted to the clip. 18. The method of claim 17,
Electromagnetic shielding device characterized in that the clip receiving groove for accommodating the clip is formed at the lower end of the side wall edge of the shielding case corresponding to the corner. 18. The method of claim 17,
The electromagnetic shielding apparatus is supplied by reel taping and the clip terminal is soldered to the ground pattern by a surface mounting process. 18. The method of claim 17,
The electromagnetic shielding case is electromagnetic shielding device, characterized in that not soldered. 18. The method of claim 17,
An edge of the electromagnetic shielding case is vertically cut so that a gap formed between the sidewalls.

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