KR101577914B1 - Shield for shielding electromagnetic wave - Google Patents
Shield for shielding electromagnetic wave Download PDFInfo
- Publication number
- KR101577914B1 KR101577914B1 KR1020140168185A KR20140168185A KR101577914B1 KR 101577914 B1 KR101577914 B1 KR 101577914B1 KR 1020140168185 A KR1020140168185 A KR 1020140168185A KR 20140168185 A KR20140168185 A KR 20140168185A KR 101577914 B1 KR101577914 B1 KR 101577914B1
- Authority
- KR
- South Korea
- Prior art keywords
- shield
- cover
- wall
- shielding
- cut
- Prior art date
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Classifications
-
- 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
- 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
- H05K9/0032—Shield cases mounted on a PCB, e.g. cans or caps or conformal shields having multiple parts, e.g. frames mating with lids
- H05K9/0033—Shield cases mounted on a PCB, e.g. cans or caps or conformal shields having multiple parts, e.g. frames mating with lids disposed on both PCB faces
-
- 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]
- H05K9/0037—Housings with compartments containing a PCB, e.g. partitioning walls
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
BACKGROUND OF THE
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
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
At this time, various methods have been applied to fix the shield can 10 on the
For example, the one-piece shield can method is a method of fixing the lower end of the
On the other hand, in the two-piece shield can system, as shown in Fig. 4, a
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
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
3, the larger the width of the shield can 10, the larger the number of
On the other hand, in the case of the two-piece shield can system, since only the shield can 10 is fastened to the
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
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 pin insertion hole is formed at one side of the cover surface. The cutting cover is cut out from the rim by inserting and lifting a pin into the pin insertion hole of the cover surface And a shield can coupled to cover and cover the upper portion of the shield when the incision cover is incised.
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.
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 formed by the incision side wall and the cover surface, and the incision can be easily made by lifting the cover surface by inserting the pin through the pin insertion hole. Further, the incision cover is formed by ironing, .
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 face 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 shield for electromagnetic wave shielding according to the present invention includes a box-shaped electromagnetic wave shielding shield 300 (see FIG. 5) having a bottom opened to cover a
The
5 to 10, the
However, there is no difference from the conventional one-piece shielded can fixing method, and there is a problem that the
5 to 7, the
It is very rare that an error due to breakage or failure occurs in the
As a result, since
The
Since the electromagnetic wave shielding function can not be performed when the upper surface of the
As shown in FIGS. 13 and 14, the cut-
Since the
17 to 20, the
The shield can 400 is coupled to the
The locking
17 to 20, the
That is, a plurality of pressing
The latching
As described above, the electromagnetic shielding shield according to the present invention is composed of the
Secondly, the
Thirdly, the
Finally, when the
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.
P: pin
100: circuit board
200: Circuit element
300: Shield
310: shield cover
311: Border
312:
312b:
320: shield wall 321:
400: shield can 410: can cover
420: Retaining rib 430:
440: compression rib 450: compression projection
Claims (5)
Wherein the shield comprises a shield cover on an upper surface and a shield wall on a side surface,
The shield cover includes a frame integrally formed with the upper end of the shield wall, a cutaway sidewall protruding upward toward the inside of the frame, a cover surface formed to seal the upper surface of the cutaway sidewall, And a pin insertion hole penetratingly formed on one side of the cutting insert,
The incision cover is cut out from the rim by inserting and lifting a pin into the pin insertion hole of the cover surface,
Further comprising a shield can coupled to cover the upper portion of the shield when the incision cover is incised,
Wherein the shield wall of the shield has a plurality of engagement grooves formed at a lower end portion thereof with an interval therebetween,
The shield can includes a flat can cover, a plurality of engaging ribs which are elastically bent downward so as to correspond to engaging grooves of the shield wall along the outer periphery of the can cover, And an engaging protrusion protruding in a lower inner direction,
When the shield can is coupled to the upper side of the shield, the engagement rib of the shield can is elastically expanded so that the engagement projection of the shield can is caught in the engagement groove of the shield wall after descending through the shield wall of the shield,
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.
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 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.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020140168185A KR101577914B1 (en) | 2014-11-28 | 2014-11-28 | Shield for shielding electromagnetic wave |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020140168185A KR101577914B1 (en) | 2014-11-28 | 2014-11-28 | Shield for shielding electromagnetic wave |
Publications (1)
Publication Number | Publication Date |
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KR101577914B1 true KR101577914B1 (en) | 2015-12-16 |
Family
ID=55080745
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020140168185A KR101577914B1 (en) | 2014-11-28 | 2014-11-28 | Shield for shielding electromagnetic wave |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0388864U (en) * | 1989-12-27 | 1991-09-11 | ||
JPH08236980A (en) * | 1995-02-28 | 1996-09-13 | Yamaha Corp | Shield board and its manufacture |
KR20130068901A (en) * | 2011-12-16 | 2013-06-26 | 삼성전자주식회사 | Apparatus of shield can for device and manufacturing method thereof |
KR101444597B1 (en) * | 2013-05-09 | 2014-09-26 | 케이에이치일렉트로닉스 주식회사 | Shield can and installing method thereof |
-
2014
- 2014-11-28 KR KR1020140168185A patent/KR101577914B1/en active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0388864U (en) * | 1989-12-27 | 1991-09-11 | ||
JPH08236980A (en) * | 1995-02-28 | 1996-09-13 | Yamaha Corp | Shield board and its manufacture |
KR20130068901A (en) * | 2011-12-16 | 2013-06-26 | 삼성전자주식회사 | Apparatus of shield can for device and manufacturing method thereof |
KR101444597B1 (en) * | 2013-05-09 | 2014-09-26 | 케이에이치일렉트로닉스 주식회사 | Shield can and installing method thereof |
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