KR101577930B1 - Shield for shielding electromagnetic wave - Google Patents

Shield for shielding electromagnetic wave Download PDF

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Publication number
KR101577930B1
KR101577930B1 KR1020150057002A KR20150057002A KR101577930B1 KR 101577930 B1 KR101577930 B1 KR 101577930B1 KR 1020150057002 A KR1020150057002 A KR 1020150057002A KR 20150057002 A KR20150057002 A KR 20150057002A KR 101577930 B1 KR101577930 B1 KR 101577930B1
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KR
South Korea
Prior art keywords
shield
cover
wall
cut
shielding
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KR1020150057002A
Other languages
Korean (ko)
Inventor
최윤석
Original Assignee
주식회사 영진전기
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Priority to KR1020150057002A priority Critical patent/KR101577930B1/en
Application granted granted Critical
Publication of KR101577930B1 publication Critical patent/KR101577930B1/en

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0007—Casings
    • H05K9/002—Casings with localised screening
    • H05K9/0022—Casings with localised screening of components mounted on printed circuit boards [PCB]
    • H05K9/0024—Shield cases mounted on a PCB, e.g. cans or caps or conformal shields
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
    • H05K1/0218—Reduction of cross-talk, noise or electromagnetic interference by printed shielding conductors, ground planes or power plane

Abstract

The present invention relates to a shield to shield electromagnetic waves, capable of easily maintaining a circuit device since the present invention has advantages of a 1-piece shield can, which are simple manufacturing and strong combination, and an advantage of a 2-piece shield can, which is free opening. The box-shaped shield to shield electromagnetic waves has a lower part opened to cover the circuit device placed on the circuit substrate. The shield comprises the shield cover on the upper surface and a shield wall on the side surface. The shield cover includes: includes a flange integrated with the upper part of the shield wall; and a cut cover including a cut side wall protruding towards the inside of the flange, and a cover surface formed to seal the upper surface of the cut side wall. The flange of the shield cover and the shield wall forms a filling insertion hole to open a side corner. The cut cover is cut from the flange by being lifted up through a filling insertion hole from the side corner of the shield cover and the shield wall, and when the cut cover is cut, a shield can, combined to cover the upper part of the shield, is more included.

Description

[0001] SHIELD FOR SHIELDING ELECTROMAGNETIC WAVE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a shield for shielding electromagnetic interference, which is installed to cover electronic components mounted on a printed circuit board (PCB) built in various electronic apparatuses and shields electromagnetic interference.

In recent years, due to the rapid development of electronics and communication technologies, it has become technically possible to use unit circuits having various functions in a narrow space. In addition, electromagnetic interference (EMI), which causes malfunction of the device due to mutual interference of electromagnetic waves (EMW) generated from the respective circuits, occurs between neighboring circuits.

In addition to the problem of electromagnetic interference, electromagnetic waves generated from electronic devices have been reported to increase the temperature of biotissue cells due to the action of heat to weaken the immune function or to exert a bad influence on the human body such as gene deformation Therefore, the need for electromagnetic shielding has been emphasized in recent years to prevent the influence of electromagnetic waves on the human body.

Generally, electromagnetic shielding means shielding the electromagnetic waves from being transmitted through the shielding material between an external electromagnetic wave generating source and an object to be protected in order to protect an apparatus susceptible to human or electromagnetic waves. Means the degree to which the electromagnetic wave incident from the outside is attenuated by reflection, absorption, internal reflection, or the like in the medium.

As a conventional electromagnetic wave shielding method, there are a method of sealing a circuit for generating an electromagnetic wave with a conductive can (shield can), a method of preventing electromagnetic wave from leaking through a joint and a connection portion of a circuit partition member formed inside the electronic device A method of applying conductive silicon along a joint and a connection portion so as to form a circuit, and a method of shielding each circuit block by using a conductive shielding tape made to have the same shape as that of a partition line in a circuit are generally applied.

Of the electromagnetic wave shielding methods described above, the most widely used method at present is a method of using shields of conductive cans. As shown in Fig. 1, a metal plate or a synthetic resin (Fe, Cu, Ni, etc.) Shielded can 10 formed in the form of a can or a box by using a conductive material such as aluminum or the like on the upper surface of the circuit element 2 so as to shield the electromagnetic wave generated from the circuit element 2 Method.

Such a shield can 10 is generally manufactured by press-working a thin plate in the form of a box having only a lower portion thereof opened so as to cover the circuit element 2, as shown in FIG. That is, the shield can 10 includes a shield upper surface 11 corresponding to an upper surface and a shield side wall 12 forming a side wall.

At this time, various methods have been applied to fix the shield can 10 on the circuit board 1, and there are three methods, one-piece shield can system, clip shield can system and two-piece shield can system have.

For example, the one-piece shield can method is a method of fixing the lower end of the shield side wall 12 of the shield can 10 by brazing onto the circuit board 1 as shown in Fig. 3, a plurality of clips 15 are arranged on the circuit board 1 so as to surround the shield side wall 12 of the shield can 10, And then the shield side wall 12 of the shield can 10 is inserted into the plurality of clips 15 and fixed.

On the other hand, in the two-piece shield can system, as shown in Fig. 4, a shielding frame 20 having a rim shape is formed on the circuit board 1 so as to correspond to the shape of the shielding sidewall 12 of the shielding can 10, 2), and then the shield side wall 12 of the shield can 10 is inserted into the shield frame 20 or fitted together.

Before considering the advantages and disadvantages of the method of fixing the shield can by the above-described various methods, an important point in the method of fixing the shield can 10 is that the shield can 10 is firmly fixed on the first circuit board 1 Secondly, the shield can 10 must be easily separated or opened from the circuit board 1 for the maintenance and repair of the circuit element 2. In response to the ultra-thin board due to the high integration of the third circuit element 2, The height of the shield can 10 must also be small.

The one-piece shield can system in the above-mentioned viewpoints that the shield can 10 can be firmly fixed as shown in FIG. 2, but it is difficult to separate and open the shield can 10 from the circuit board 1 . However, the shield upper surface 11 of the shield can 10 is cut by rotating the shield upper surface 11 of the shield can 10 even in the case of the one-piece shield can, like the 'electromagnetic shielding shield' of Patent Registration No. 10-1062484. The circuit element 2 can be maintained and repaired. However, in this case as well, a space for opening the shield can 10 is necessary, and therefore the thickness of the shield can 10 must be increased.

3, the larger the width of the shield can 10, the larger the number of clips 15, and the larger the number of clips 15 of a smaller size, It is also troublesome that the shield can 10 is easily detached from the clip 15.

On the other hand, in the case of the two-piece shield can system, since only the shield can 10 is fastened to the shield frame 20 after the shield frame 20 is installed on the circuit board 1 in advance as shown in Fig. 4, When the shield side wall 12 of the shield can 10 is simply inserted into the insertion groove 21 of the shield frame 20 as shown in Fig. 4, the shield can (Fig. 4) 10) may be easily detached. In addition, in order to maintain and repair the circuit element 2 when it is inserted and fixed through the fixing protrusions and the fixing jaws, as in the case of the 'fixing member of the shielding case for a printed circuit board' of Patent Document 10-2010-0092201, It is almost impossible to open the shield frame 20 from the shield frame 20.

Although not shown in the drawings in the case of the two-piece shield can system, a plurality of insertion holes may be formed to extend along the outer circumference of the shield frame 20, and a plurality of insertion holes may be formed along the inner circumference of the shield sidewall 12 of the shield can 10, Protrusions may be formed so as to protrude so that protrusions of the shield side wall 12 are inserted into the insertion holes of the shield frame 20. However, when a plurality of insertion holes are formed around the outer periphery of the shield frame 20, the diameter of the insertion hole must be sufficiently large so that the projection of the shield can 10 is inserted and firmly fixed. The height of the sidewall of the can 10 must be increased. This causes a problem that the ultra-thin plate of the shield can 10 can not be achieved in response to the ultra-thin plate of the circuit element 2.

First, the structure that can be firmly coupled while being fabricated in the simplest manner is a one-piece shielded can system. However, since it can not be opened and closed, it is difficult to maintain and repair the circuit element In the case of the two-piece shielded can system, which is advantageous in that the circuit element can be easily maintained and repaired because the second opening and closing is free, there is a problem that the structure is complicated and the manufacturing process is increased and the product unit price thereof increases sharply .

It is an object of the present invention to solve the above-mentioned problems. It is an object of the present invention to provide a two-piece shield can, which is advantageous of a one-piece shield can, And to provide a shield for electromagnetic wave shielding that can be easily carried out.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings.

In order to achieve the above object, the shield for electromagnetic wave shielding according to the present invention is a box-shaped shield for shielding electromagnetic waves having a bottom opened so as to cover circuit elements arranged on a circuit board, And a shielding wall on the side surface, wherein the shielding cover is integrally formed with the upper end of the shielding wall, and a cutting side wall is formed to protrude upward from the inside of the rim, and the upper surface of the cutting side wall is closed And a cutout cover having a cover surface formed thereon, wherein a rim of the shield wall and a shield cover is formed with a filling insertion port so that one side edge is opened, Is cut from the rim by lifting it upwardly through the filleting insert, and when the incision cover is incised, It characterized in that it further comprises a shield coupled to the can to cover wrap.

Further, the cutting cover is formed by ironing to increase the height of the cover surface while reducing the thickness of the cutting side wall during the press working.

In addition, the incision cover may further include a cutting tip extended to a filling port of the rim.

Further, the incision cover may include an incision from the rim by a peeling tool including a handle that can be grasped by a worker, a scraper blade coupled to the handle, and a peeling protrusion protruding from one end of the scraper blade .

After the filling protrusion of the peeling tool is inserted into the filling inserting hole, the edge of the incision cover is lifted upward with reference to one side edge of the shield wall and the shield cover, And the cutter cover is cut along the cut-away sidewall of the cut-out cover which is brought into contact with the scraper blade so as to cut out from the cut-out.

The shield can has a plurality of engagement grooves formed at a lower end thereof with a gap therebetween. The shield can has a flat can cover and a plurality of engagement grooves formed in the engagement grooves of the shield wall along the outer periphery of the can cover. A plurality of latching ribs which are elastically bent downward at mutually spaced intervals so as to correspond to each other and a latching protrusion protruding inwardly in the lower end of each of the latching ribs when the shielding can is coupled to the upper side of the shielding, The latching rib is elastically opened so that the latching pawl of the shield can descends through the shielding wall of the shield, and then is caught and fixed in the latching groove of the shielding wall.

In addition, the latching protrusion of the shield can is characterized in that the lower side is hooked and fixed to the latching groove of the shielding wall after the downwardly inclined obliquely angled triangle-shaped downward riding on the shielding wall of the shielding.

The shield can further includes a plurality of pressing ribs which are elastically bent downward so as not to interfere with the engaging ribs along the outer periphery of the can cover and pressing protrusions protruding from the inner surfaces of the pressing ribs, When the shield can is coupled to the upper side of the shield, the pushing rib of the shield can is elastically opened so that the pushing projection of the shield can presses and fixes the shield wall of the shield.

The shield for electromagnetic wave shielding according to the present invention is composed of a shield cover and a shield wall and shields electromagnetic waves by simply covering the circuit elements, so that it can function as a one-piece shield can and can be firmly assembled while being simple.

Second, the shield cover is composed of a rim and an incision cover so that only a circuit element requiring replacement or inspection can be cut off and covered with a shield can to serve as a two-piece shield can only when circuit elements need to be replaced or inspected. The maintenance and repair of the circuit element can be easily performed.

Third, the incision cover is composed of the incision side wall and the cover face, and the incision cover is lifted by inserting the filling protrusion of the peeling tool through the filling inserting hole of the opened corner, and the incision cover can be easily cut while pushing it with the scraper blade. So that the incision can be made easier.

Finally, when the incision cover is incised to serve as a two-piece shield can, the shielding can is easily opened and closed by forming a catching groove, a catching rib, a catching protrusion, a pushing rib and a pushing projection on the shielding wall, Can be firmly coupled.

1 is a perspective view showing a shield for electromagnetic wave shielding according to the prior art,
2 is a side sectional view showing a conventional one-piece shielded can fixing method,
3 is a side cross-sectional view showing a conventional method of fixing a clip shield can,
4 is a side cross-sectional view showing a conventional two-piece shield can fixing method,
5 and 6 are perspective views showing a first embodiment of an electromagnetic wave shielding shield according to the present invention,
FIGS. 7 to 10 are perspective views illustrating a process of cutting a dissection cover for replacement and inspection of circuit elements based on the embodiment of FIG. 5,
11 and 12 are perspective views showing a second embodiment of shield for electromagnetic wave shielding according to the present invention,
Figure 13 is a side cross-sectional view of the embodiment of Figure 6,
Figure 14 is a side cross-sectional view of the embodiment of Figure 9,
Figure 15 is a side cross-sectional view of the embodiment of Figure 11,
Figure 16 is a side cross-sectional view of the embodiment of Figure 12,
17 is a perspective view showing a second embodiment of shield for electromagnetic wave shielding according to the present invention,
Fig. 18 is a perspective view showing the engaged state of the embodiment of Fig. 17,
Fig. 19 is an exploded perspective view of the embodiment shown in Fig. 17, in which the incision cover is rotated so as to look at the incised shield and the bottom of the shield can,
Fig. 20 is a perspective view showing the engaged state of the embodiment of Fig. 19;

Hereinafter, preferred embodiments of the shield for electromagnetic wave shielding according to the present invention will be described in detail with reference to the accompanying drawings.

The electromagnetic shielding shield according to the present invention includes a box-shaped electromagnetic shielding shield 300 (see FIG. 5), which is opened to cover a circuit element 200 disposed on the circuit board 100, )to be. The shield 300 is composed of a shield cover 310 on an upper surface and a shield wall 320 on a side surface and the shield cover 310 includes a rim 311 and a lid cover 312. The incision cover 312 includes a cutting side wall 312a, a cover surface 312b and a cutting tip 312c, and the cutting cover 312 can be cut. When the incision cover 312 is incised, the upper portion of the shield 300 may be covered and covered with the shield can 400. The cover 311 of the shield wall 320 and the shield cover 310 is formed with a filler insertion hole 311a which is open at one corner and is connected to the filler insertion hole 311a through a filling tool 500 The incision cover 312 can be cut and peeled off.

The circuit board 100 is a flat board made of an insulating material so that electronic components, that is, circuit elements 200 and the like are mounted as shown in FIG. 5 and connected to each other to form a circuit. In the circuit board 100, not only the circuit elements 200 to be shielded but also all the elements constituting the connection port or other electric circuit are not shown in the figure.

5 to 10, the shield 300 includes a shield cover 310 on an upper surface and a shield cover 310 on an upper surface in a box shape having a lower opening so as to cover the circuit elements 200 disposed on the circuit board 100. [ And a wall 320. The shield cover 310 shields the upper portion of the circuit element 200 and the shield wall 320 is bent downward along the periphery of the shield cover 310 and is fixedly installed on the circuit board 100, The lower end of the shield wall 320 may be fixedly mounted on the circuit board 100 through soldering. Therefore, the shield 300 composed of the shield cover 310 and the shield wall 320 functions as a one-piece shield can-fixing system.

However, there is no difference from the conventional one-piece shielded can fixing method, and there is a problem that the shield 300 itself must be removed for replacement or inspection of the circuit element 200. Therefore, The shield cover 310 includes a rim 311 and an incision cover 312. The incision cover 312 has a characteristic configuration of the incision side wall 312a and the cover surface 312b, And the rim 311 of the shield cover 310 are formed with a filling insertion port 311a so that one side edge is opened.

5 to 7, the rim 311 of the shield cover 310 is formed integrally with the upper end of the shield wall 320 as a name, in other words, the rim of the shield cover 310 311, the shield wall 320 is bent downward. At this time, the rim 311 and the shield wall 320 of the shield cover 310 are formed with a filling inserting hole 311a which is open at one corner, and the both ends are separated from each other. The incision cover 312 is formed with a cutting side wall 312a protruding upward toward the inside of the rim 311 and a cover surface 312b is formed to seal the upper surface of the cutting side wall 312a. Therefore, the edge of the incision cover 312 is also exposed to the outside through the opening of the filling insertion port 311a.

It is very rare that an error due to breakage or failure occurs in the circuit element 200 when checking the circuit element 200 mounted on the circuit board 100 installed in the electronic apparatus. For example, in the case where the circuit element 200 is required to be re-inspected and replaced due to an error in the mass production, one of 10,000 products is produced. Therefore, it is very rare to open the electromagnetic wave shielding shield 300. Therefore, if the two-piece shielded can fixing scheme of a complicated configuration is adopted in advance with the opening and closing in mind, there arises a problem that the production cost increases remarkably.

As a result, since most shields 300 for electromagnetic wave shielding are used without being opened, they are discarded, so that they have a one-piece shield can-fixing system that is easy to manufacture and install while being faithful to the original function of shield 300 for electromagnetic wave shielding. It is most preferable to have a structure that can be easily cut only to the two-piece shield can-fixing system and easily converted.

The shield 300 for electromagnetic wave shielding according to the present invention is a one-piece shielded can fixing system composed of the shield cover 310 and the shield wall 320. However, The shield cover 310 is configured by the frame 311 and the cutout cover 312 so that the cutout cover 312 can be easily cut from the frame 311. [ The incision cover 312 is composed of a cutting side wall 312a and a cover surface 312b so that the incision cover 312 can be easily cut from the rim 311. At this time, The filling protrusion 530 of the filling tool 500 to be described later is inserted into the filling insertion opening 311a opened at one side edge of the cover 311 and the shield wall 320 of the cover 310, 311, the incision cover 312 is incised. 10, when the incision cover 312 is cut from the rim 311, the upper surface of the shield cover 310 is opened to expose the circuit element 200, It is possible to inspect and replace the circuit element 200 through the through-hole.

More specifically, a peeling tool 500 is used to incise and peel the incision cover 312 through the filling inserting hole 311a. The peeling tool 500 is used to peel off the incision cover 312, A scraper blade 520 coupled to the handle 510 and a peeling protrusion 530 protruding from one end of the scraper blade 520. [ The dissection cover 312 is cut from the rim 311 using the filling tool 500. 9, after the filling protrusion 530 of the filling tool 500 is inserted into the filling inserting hole 311a, the protrusion 530 of the filling tool 500 is inserted into the filling inserting hole 311a with reference to one side edge of the shielding wall 320 and the shielding cover 310, The scraper blade 520 of the peeling tool 500 is brought into contact with the upper surface of the rim 311 of the shield cover 310 as shown in Fig. 10, The cutout cover 312 is cut along the cutout side wall 312a of the cutout cover 312 which is lifted up to the cutout 312 from the cutout 311 and is peeled off.

As shown in FIGS. 13 and 14, the cut-away cover 312 can be easily cut from the rim 311 while reducing the thickness of the cutting side wall 312a during press working, And is formed by ironing processing to raise the height. Ironing is a kind of drawing processing especially in press working, which is a process of thinning the thickness of a sidewall protruding from the thickness of a material and a protruding upper surface. Since the sidewall is weak in shear force according to the thickness of the thinned sidewall, It is possible to peel off the protruded upper surface. Therefore, when cutting the incision cover 312 from the rim 311, the thickness of the incision side wall 312a is thinner than the cover surface 312b of the incision cover 312, The shearing force is applied to the incising sidewall 312a to easily break the incision cover 312 from the rim 311 and to facilitate the cutting of the incising cover 312 especially with the peeling protrusion 530 of the peeling tool 500. [ The incision cover 312 can be more easily cut and peeled by scraping along the incision side wall 312a of the incision cover 312 through the scraper blade 520. [

17 to 20, the cutting cover 312 is provided with a cutting tip (not shown) extending to the filling insertion port 311a of the rim 311 together with the cutting side wall 312a and the cover surface 312b 312c. The reason for placing the cutting tip 312c is that there is a possibility that the shielding wall 320 and the frame 311 are disconnected and deformed in shape due to the distortion of the peeling insertion hole 311a This is because the rigidity against the upward load of the incision cover 312 can be increased through the incision tip 312c extended to the filling insertion port 311a of the frame 311. [ Secondly, when the incision cover 312 is cut away from the rim 311, the incision tip 312c is easily cut as shown in Figs. 19 and 20, and then the incision sidewall 312a The incision cover 312 can be easily removed by cutting the incision cover 312 from the rim 311 along with the incision.

Since the electromagnetic wave shielding function can not be performed in the state that the upper surface of the shield cover 310 is opened after the incision cover 312 is cut off as described above, it is closed through the separate shield can 400. 11 and 12, the shield can 400 is coupled to cover the upper portion of the shield 300 when the cut-off cover 312 is cut. In other words, the shield can 400 is provided only when the incision cover 312 is cut to inspect and replace the circuit element 200, and other good circuit elements 200 need not be inspected and replaced, The cover 312 performs the electromagnetic wave shielding function through the incision cover 312 without being cut. As a result, the electromagnetic shielding shield 300 according to the present invention performs an electromagnetic shielding function in a one-piece shield can-fixing manner in most cases in which the circuit element 200 is not inspected and replaced, and the circuit element 200 Shielded can 400 is covered and the electromagnetic wave shielding function is performed by the two-piece shield can-fixing method.

That is, since the circuit element 200 is inspected and replaced after the incision cover 312 is cut from the rim 311, and the inside of the rim 311 of the incision cover 312 is opened, The shield can 400 is covered and shielded. 11, 12, 15, and 16, the shield can 400 is not firmly coupled to the shield wall 320 of the shield 300, The shape and structure of the shield can 400 and the shield wall 320 are changed to have a structure that is more firmly coupled and can be opened and closed again.

21 to 24, the shielding walls 320 of the shield 300 have a plurality of engagement grooves 321 formed at the lower end thereof at mutually spaced intervals to form a locking protrusion (not shown) of the shield can 400 430 are engaged and fixed. The rim 311 of the shield cover 310 supports the lower surface of the can cover 410 of the shield can 400 when the shield can 400 is coupled to the shield 300 as described later.

The shield can 400 is coupled to the shield 300 where the dissection cover 312 is cut so as to cover the circuit element 200 disposed on the circuit board 100 as shown in FIGS. 21 to 24, A can cover 410, a locking rib 420, and a locking protrusion 430. The can cover 410 functions as a body of the shield can 400 to shield electromagnetic waves in the top surface direction of the circuit element 200 in a flat plate shape. A locking rib 420 and a locking protrusion 430 are provided so that the can cover 410 of the shield can 400 can be coupled to the shield wall 320. The catching ribs 420 are elastically bent downward to correspond to the respective catching grooves 321 of the shield wall 320 along the outer periphery of the can cover 410, And protrudes inward from the lower end of the latching rib 420. When the shield can 400 is coupled to the upper side of the shield 300, the engagement rib 420 of the shield can 400 is elastically opened so that the engagement protrusion 430 of the shield can 400 And is caught and fixed in the engagement groove 321 of the shield wall 320 after descending through the shield wall 320 of the shield 300.

The locking protrusion 430 of the shield can 400 is formed such that a hypotenuse that is inclined in a right-angled triangle shape is lowered along the shield wall 320 of the shield 300, 321 so as to be more firmly fixed. At this time, even when the shield can 400 is firmly fixed to the shield 300, the shield can 400 can be easily separated from the shield 300 because the guard rib 420 is elastically bent. That is, when the user releases the latching protrusion 430 of the shield can 400 from the latching groove 321 of the shielding wall 320, the latching rib 420 is elastically opened so that the latching protrusion 420 430 are released and the shield can 400 can be easily separated from the shield 300.

21 to 24, the engagement ribs 420 and the latching protrusions 430 do not cause any problem in performing the above-described functions. However, when the shield can 400 is connected to the shield 300 It is necessary to prevent twisting at the time of reattachment and lifting of the portion of the shield can 400 where the latching rib 420 is not present. For this purpose, the shield can 400 may further include a pressing rib 440 and a pressing projection 450.

That is, a plurality of pressing ribs 440 are elastically bent downward along the outer periphery of the can cover 410 so as not to interfere with the engaging ribs 420, and the pressing protrusions 450 are formed on the respective pressing ribs 440). When the shield can 400 is coupled to the upper side of the shield 300, the pushing rib 420 of the shield can 400 is elastically opened so that the pushing projection 450 of the shield can 400 The shield wall 320 of the shield 300 can be pressed and fixed.

The latching ribs 420 and the latching protrusions 430 of the shield can 400 are hooked and fixed to the shielding wall 320 of the shield 300 and the pressing ribs 440 of the shielding can 400, (450) simply presses the shield wall (320) to secure the shield can (400) so that it does not twist or hold.

As described above, the electromagnetic shielding shield according to the present invention is composed of the first shield cover 310 and the shield wall 320 and simply shields the electromagnetic wave by covering the circuit element 200, so that it usually functions as a one-piece shield can Can be assembled firmly while being manufactured simply.

Secondly, the shield cover 310 is composed of the rim 311 and the cutout cover 312, and the cutout cover 312 is cut only for the circuit element 200 which needs to be replaced or checked. Then, the cutout cover 312 is covered with the shielded can 400, Only when the device 200 needs to be replaced or inspected, it functions as a two-piece shield can, and maintenance and repair of the circuit element 200 can be easily performed by opening and closing freely.

Thirdly, the incision cover 312 is composed of a cutting side wall 312a and a cover surface 312b, and the filling protrusion 530 of the peeling tool 500 is inserted through the peeling insertion hole 311a of the opened corner, The cutter 312 can be easily cut while lifting the cutter 312 and pushing it with the scraper blade 520. The cutter cover 312 can be formed by ironing to make it easier to cut.

Finally, when the incision cover 312 is incised to serve as a two-piece shield can, the shielding wall 320 and the shield can 400 are provided with the engagement grooves 321, the engagement ribs 420, the engagement protrusions 430, The pressing ribs 440 and the pressing protrusions 450 may be formed so that the shield can 400 can be firmly coupled to the shield wall 320 while being easily opened and closed.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

100: circuit board
200: Circuit element
300: Shield
310: shield cover
311: Rim 311a: Filling insert
312: incision cover 312a: incision side wall
312b: cover surface 312c: cutting tip
320: shield wall 321:
400: shield can 410: can cover
420: Retaining rib 430:
440: compression rib 450: compression projection
500: Peeling tool 510: Handle
520: scraper blade 530: peeling projection

Claims (8)

1. A box-shaped shield for shielding electromagnetic waves having a bottom opened so as to cover circuit elements arranged on a circuit board,
Wherein the shield comprises a shield cover on an upper surface and a shield wall on a side surface,
The shield cover
A frame integrally formed with the upper end of the shield wall,
And an incision cover formed with a cutting side wall protruding upward toward the inside of the rim and having a cover surface for sealing an upper surface of the cutting side wall,
The rims of the shield wall and the shield cover
A filling port is formed so that one side edge is opened,
The incision cover
The shield cover and the shield cover are cut out from the rim by lifting up through the filling inserting hole with reference to one side edge of the shield wall and the shield cover,
Further comprising a shield can coupled to cover the upper portion of the shield when the incision cover is incised,
The incision cover
Characterized in that the electromagnetic shielding member is cut out from the rim by a peeling tool including a handle that can be held by a worker, a scraper blade coupled to the handle, and a peeling protrusion protruding from one end of the scraper blade .
The method according to claim 1,
The incision cover
Wherein the shielding sidewall is formed by ironing to increase the height of the cover surface while reducing the thickness of the cutting side wall during press working.
The method according to claim 1,
The incision cover
Further comprising a cutting tip extending to a filling inlet of the rim.
delete The method according to claim 1,
A peeling protrusion of the peeling tool is inserted into the filling inserting hole, and the edge of the cutting cover is lifted upwards with reference to one side edge of the shielding wall and the shielding cover, and a scraper blade Wherein the cut-away portion is cut out from the rim while pushing the cut-away cover along the cut-away sidewall of the cut-out cover brought into contact with the cut-out cover.
The method according to claim 1,
The shield wall of the shield
A plurality of latching grooves are formed at the lower end with mutual spacing,
In the shield can,
A flat cover-like can cover,
A plurality of engaging ribs elastically bent downward so as to correspond to engaging grooves of the shield wall along the outer periphery of the can cover;
And a latching protrusion protruding inward from a lower end of each of the latching ribs,
When engaging the shield can above the shield, the engaging rib of the shield can elastically spread, so that the engaging projection of the shield can is caught and fixed in the engaging groove of the shield wall after descending through the shield wall of the shield Shielding for electromagnetic wave shielding.
The method according to claim 6,
The shield can prevent the shield can,
Wherein a bottom side of the rounded right triangle-shaped oblique side is lowered on the shielding wall of the shield by engaging with the catching groove of the shielding wall.
The method according to claim 6,
In the shield can,
A plurality of pressing ribs which are elastically bent downwardly so as not to interfere with the engaging ribs along the outer periphery of the can cover,
Further comprising a pressing projection projectingly formed on an inner surface of each of the pressing ribs,
Wherein when the shield can is coupled to the upper side of the shield, the pressing rib of the shield can elastically spread, so that the pressing projection of the shield can presses and fixes the shield wall of the shield.
KR1020150057002A 2015-04-23 2015-04-23 Shield for shielding electromagnetic wave KR101577930B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11047628B2 (en) 2016-02-18 2021-06-29 Samsung Electronics Co., Ltd. Electronic device having heat collection/diffusion structure
CN113632598A (en) * 2019-03-19 2021-11-09 微软技术许可有限责任公司 Ventilation shielding cover

Citations (5)

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Publication number Priority date Publication date Assignee Title
JPH0388864A (en) * 1989-06-01 1991-04-15 Sumitomo Chem Co Ltd Pyridone monoazo compound and method for dyeing or printing textile material using the same
JP3088864B2 (en) * 1992-11-02 2000-09-18 タイガースポリマー株式会社 Rubber sheet and joining device using the same
JP2003133777A (en) * 2001-10-24 2003-05-09 Matsushita Electric Ind Co Ltd Shield case
JP2014022648A (en) * 2012-07-20 2014-02-03 Tatsuta Electric Wire & Cable Co Ltd Peeling tool for protective film on printed wiring board
KR101444597B1 (en) * 2013-05-09 2014-09-26 케이에이치일렉트로닉스 주식회사 Shield can and installing method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0388864A (en) * 1989-06-01 1991-04-15 Sumitomo Chem Co Ltd Pyridone monoazo compound and method for dyeing or printing textile material using the same
JP3088864B2 (en) * 1992-11-02 2000-09-18 タイガースポリマー株式会社 Rubber sheet and joining device using the same
JP2003133777A (en) * 2001-10-24 2003-05-09 Matsushita Electric Ind Co Ltd Shield case
JP2014022648A (en) * 2012-07-20 2014-02-03 Tatsuta Electric Wire & Cable Co Ltd Peeling tool for protective film on printed wiring board
KR101444597B1 (en) * 2013-05-09 2014-09-26 케이에이치일렉트로닉스 주식회사 Shield can and installing method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11047628B2 (en) 2016-02-18 2021-06-29 Samsung Electronics Co., Ltd. Electronic device having heat collection/diffusion structure
US11098959B2 (en) 2016-02-18 2021-08-24 Samsung Electronics Co., Ltd. Electronic device having heat collection/diffusion structure
US11555657B2 (en) 2016-02-18 2023-01-17 Samsung Electronics Co., Ltd. Electronic device having heat collection/diffusion structure
CN113632598A (en) * 2019-03-19 2021-11-09 微软技术许可有限责任公司 Ventilation shielding cover

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