TW201547367A - EMI shielding component - Google Patents

Abstract

An EMI shielding component comprises a cover and at least two engaging members, wherein the cover covers a substrate and is made of electricity-conductive material. The top of the cover extends downward to form at least one side board which is bent inwardly to form at least two engaging parts. The top of the cover is a non-contour surface, and the distance between the substrate and each of the two sides of the top is not equal to the other. The at least two engaging members are capable of being vertically connected with the substrate; each engaging member has an opening to be engaged by the engaging part. Thus, the cover in a shape of different curvatures can be combined with the engaging members via engagement so as to fit the curvature design of end product appearance adaptively. In addition, this invention changes the original circular frame to a plurality of engaging members having smaller sizes and resisting deformation caused by collision, which reduces the possibility of missing weld between the engaging members and the substrate.

Description

Anti-electromagnetic interference component

The present invention relates to electronic components, and more particularly to a structural improvement of components for shielding electromagnetic wave interference between circuit components.

Electromagnetic Interference (EMI) refers to any electromagnetic phenomenon that occurs under the electromagnetic field with the action of voltage and current, which can degrade the performance of a certain device, device or system, interfere with each other, or adversely affect biological organisms. . The main cause of electromagnetic interference is related to the excessive distribution density of circuit components. In addition, the current wireless communication products tend to greatly reduce the area of products and substrates in order to reduce the size and thickness of the products, thus increasing the mutual components on the substrate. The possibility of interference.

Taking a wireless communication product such as a mobile phone or a tablet computer as an example, in order to solve the problem of electromagnetic interference and increase the sensitivity of reception, a shielding structure 70 including a lower frame 71 and an upper cover 72 is usually used inside the product. Please refer to Figure 1. The lower frame 71 is disposed on a substrate (not shown) and is used to frame the circuit components to be shielded. The lower frame 71 includes a plurality of sidewalls 711 and a plurality of bumps 712 are disposed on the sidewalls. The upper cover 72 includes a top plate 721 and a tab 722 vertically disposed from a circumferential side of the top plate 721. The tab 722 is provided with a plurality of punching holes 723. When the upper cover 72 is assembled to the lower frame 71, the convex portion 712 of the lower frame 71 can be The upper cover 72 is fixed to the lower frame 71 by being engaged with the punching holes 723 on the tab 722.

Since the conventional shielding structure 70 uses the bumps 712 and the punching holes 723 to engage the upper cover 72 and the lower frame 71, the diameter of the punching holes and the bumps is at least 0.5 mm or more due to the limitation of the processing precision of the conventional sheet metal process. Therefore, the conventional shielding structure 70 is not conducive to the trend of thinness and shortness of the product, and the punching 723 in the upper cover 72 also requires additional use of the mold to raise the manufacturing cost. Secondly, the existing lower frame 71 is mostly a closed square or polygonal frame. If it is collided during manufacturing, packaging and transportation, the lower frame 71 is easily deformed to affect its flatness, which leads to the problem of air welding during SMT. . Furthermore, if there is a wafer under the lower frame 71 to dissipate heat, it is also necessary to cut off the bridge 713 in the middle of the lower frame 71, which is also a waste of manpower and man-hours.

More importantly, with the development of current streamlined and curved outer casings, the upper cover 72 must be designed to be a non-equal top surface designed to fit the outer casing, so the conventional upper cover The design of 72 is obviously difficult to meet the development trend of future products.

In view of this, the main object of the present invention is to provide an electromagnetic wave interference preventing component, wherein the top surface of the cover body can be designed as a non-equal plane or curved surface to correspond to the curved product housing.

Another object of the present invention is to provide a thin-walled anti-electromagnetic interference component in which the lower frame is less likely to be deformed by collision, thereby affecting the subsequent connection with the substrate.

In order to achieve the above object, the present invention provides an electromagnetic wave interference preventing component comprising a cover body and at least two snap fasteners. The cover body is disposed on a substrate, the cover body is made of a conductive material and the top surface faces downward to form at least one side plate, and the side plate is bent inward to form at least two buckle portions. The at least two fastening members are erectably connected to the substrate, and each of the fastening members has an opening formed therein For the buckles to be snapped. When the cover is disposed on the substrate, the distance between the opposite ends of the top surface of the cover and the substrate is not equal.

Thereby, the cover bodies of different top shapes can be engaged with the plurality of snap fasteners by means of snapping, so that the curved outer casing of the current product can be matched. Moreover, the present invention changes the conventional annular frame into a plurality of snap members, each of which has a small volume and is not easily deformed by collision, thereby reducing the possibility of empty welding between the subsequent snap members and the substrate.

1‧‧‧Anti-electromagnetic interference components

10‧‧‧ cover

11‧‧‧ side panel

12‧‧‧Cut Department

13‧‧‧ corner

14‧‧‧ top board

15‧‧‧ first end

16‧‧‧second end

20‧‧‧Card fasteners

21‧‧‧Opening

22‧‧‧Drawing Department

23‧‧‧ pins

24‧‧‧First card fastener

25‧‧‧Second fasteners

S‧‧‧Substrate

R‧‧‧ positioning slot

D, d‧‧‧ height

H, H’‧‧‧ Height

70‧‧‧Shielding structure

71‧‧‧ Lower frame

711‧‧‧ side wall

712‧‧‧ bumps

713‧‧‧ Bridge

72‧‧‧Upper cover

721‧‧‧ top board

722‧‧‧

723‧‧‧punching

Figure 1 is an exploded perspective view of a conventional shield structure.

Fig. 2 is an exploded perspective view showing the electromagnetic wave interference preventing component of the first embodiment of the present invention.

Fig. 3 is a perspective view showing another angle of the cover body according to the first embodiment of the present invention for explaining the position of the buckle portion.

Fig. 4 is a schematic view showing the combination of the electromagnetic wave preventing component of the first embodiment of the present invention.

Figure 5 is a partial cross-sectional view showing the electromagnetic wave interference preventing component of the first embodiment of the present invention, illustrating the case where the buckle portion is snapped to the opening.

Fig. 6 is an exploded perspective view showing the electromagnetic wave interference preventing component of the second embodiment of the present invention.

Fig. 7 is an exploded perspective view showing the electromagnetic wave interference preventing component of the third embodiment of the present invention.

Fig. 8 is an exploded perspective view showing the electromagnetic wave interference preventing component of the fourth embodiment of the present invention.

In order to better understand the characteristics of the anti-electromagnetic interference component of the present invention, the present invention provides a first embodiment and is described below with reference to the drawings. Please refer to Figures 2 to 5. In order to facilitate the description of the following embodiments, the following description is based on the opening of the lid body 10 facing downward. The anti-electromagnetic interference component 1 of the present invention is disposed on a substrate S, and the main components thereof comprise a cover body 10 and four snap fasteners 20. The structure of each component and the relationship between them are as follows:

Referring first to Figures 2 to 3, the cover 10 is made of metal and has a square shape, and has a top plate 14 which is bent downward to form six side plates 11, each of which has a thin plate shape and The bottom end protrudes downwardly and is bent inwardly to form at least one latching portion 12. In the embodiment, the number of the latching portions 12 on each side panel 11 is one or two, so that the total number of the latching portions 12 is Eight. The top plate 14 is formed by one of the contour planes and a sloped surface, and has a first end 15 and a second end 16 opposite to each other. The height d of the cover 10 at the first end 15 is smaller than The height D of the two ends 16 is such that when the cover 10 is covered on the substrate S, the spacing between the first end 15 and the second end 16 of the top surface of the cover 10 and the substrate S are not equidistant (as shown in FIG. 4). .

Please return to FIG. 2 , the four-clamping member 20 is substantially L-shaped, and the bottom end thereof extends downward to form two pins 23 , and the pin 23 can be inserted into the positioning slot R of the substrate S, so that the latching member 20 can be It is connected upright above the substrate S by soldering of the pins 23 to the substrate S. The bottom end of the fastening member 20 is provided with two opening holes 21, and the corner end of the top surface of the fastening member 20 extends to form a suction portion 22, and each of the fastening members 20 can be divided into two according to the height H, H' For the second group.

When the invention is in use, the automated device can adsorb the suction portion 22 of each of the fastening members 20, move it onto the substrate S and correspondingly insert it into the positioning groove R, and then perform welding of the two. Since the first end 15 of the cover 10 of the embodiment is lower than the second end 16, the two sets of buckles can be The pieces 20 are respectively disposed on both sides of the substrate S, and the area surrounded by the four snap fasteners 20 after welding is slightly smaller than the area projected by the top plate 14 to the substrate S. After the completion, the cover body 10 can be sucked up to the upper side of the fasteners 20 by the automatic device, and the cover body 10 is pressed down so that the buckle portion 12 can be correspondingly buckled to the opening 21 (as shown in FIG. 5). The top end of each of the latching members 20 after the snapping is abutted against the corner end 13 of the cover body 10, which further increases the overall stability.

Compared with the conventional shielding structure 70, the present invention disassembles the lower frame 71, which is originally formed in a four-corner ring shape, into a small-sized four-fastening member 20, so that it is not easy to be bulky due to the lower frame 71 during manufacturing, packaging, and transportation. The relationship is subject to collision deformation, which can also reduce the possibility of space-time welding of subsequent SMT parts. Furthermore, the present invention can be used for the production of the fasteners 20 by the automatic equipment, and there is no support bridge between the fasteners 20, so that the whole process can be mass-produced in the process, and there is no traditional shielding structure. 70 The problem of trimming the bridge 713 due to the need for heat dissipation of the circuit components. More importantly, the present invention uses the buckle to engage the cover body 10 and the buckle member 20, so that the height of the integral assembly 1 can be shortened without the problem of sheet metal processing accuracy, and the cover body 10 can be followed by the terminal. The appearance of the product is curved, and the top plate 14 is correspondingly formed into a non-equal surface such as a bevel or a curved surface, which can better satisfy the development trend of the arc of the product casing.

It is to be noted that the top plate 14 of the cover 10 of the present invention is not limited to any shape, and may have a curved surface and a sloped surface and is not limited to a plane and a slope which are connected as described in the above embodiment. The cover 10 can also be changed from the original square to the polygon, and the clip 20 can also be correspondingly designed into other shapes. The snap member 20 is mainly used to fix the cover 10, and its height can also be adjusted according to the cover 10. The latching member 20 does not necessarily have to have its top end abutting against the top cover body 10, as long as the latching portion 12 of the cover body 10 can be smoothly engaged with the opening 21 of the latching member 20. In addition, the cover 10 of the present invention may also optionally use other materials, such as a plastic cover, and then the cover 10 The inner or outer surface is coated with a conductive layer, which also achieves the effect of shielding electromagnetic interference.

The present invention further provides a second embodiment. Please refer to FIG. 6, wherein the main components of the second embodiment are substantially the same as the first embodiment, and the main differences are detailed as follows:

The number of the side plates 11 is one, which is formed by extending from the end edge of the top plate 14 by a metal stamping process. The number of the latching portions 12 of the side plate 11 is two, and the latching portions 12 are respectively disposed at the first end of the side plate 11 15 is central to the bottom end of the second end 16.

The number of the latching members 20 is also two, and an opening 21 is defined in the center of the bottom end for the latching portion 12 to be buckled. The two fastening members 20 are substantially in a straight shape and match the heights of the first end 15 and the second end 16 of the cover 10 so that the two fastening members 20 are not equal, and the two fastening members 20 are spaced apart. The two latching members 20 are disposed under the first end 15 and the second end 16 of the cover 10 at the two ends of the substrate. It should be noted that the shape of the two fastening members 20 can also be changed to a U- shaped shape to make the overall structure more stable.

In the second embodiment, the latching portion 12 may not be disposed at the center of the bottom end of the first end 15 and the second end 16 of the side panel 11, and the number of the latching portions 12 may exceed two; The number of the pieces 20 may also be three or more, and a plurality of openings 21 may be respectively formed at the bottom ends thereof for the buckle portions 12 to be buckled to increase the stability of the structure.

The present invention further provides a third embodiment, please refer to FIG. The main difference between the third embodiment and the first embodiment is that the top surface of the top plate 14 of the cover 10 has a circular arc shape. The number of the latching members 20 is two, and when the cover member 10 is placed on the substrate S, the two latching members 20 are correspondingly disposed under the opposite ends of the cover body 10, and thus The cover body 10 and the two fastening members 20 can be firmly engaged.

The present invention further provides a fourth embodiment, please refer to FIG. 8. The main difference between the fourth embodiment and the second embodiment is that the number of the latching members 20 is three, and each is a first latching member 24 of a substantially inline type and two of the generally L-shaped type. The second latching member 25 is configured, and when the cover body 10 is disposed on the substrate S, the first latching member 24 and the second latching members 25 are respectively disposed at opposite first ends of the top surface of the cover body 10 15 is below the second end 16.

Finally, it must be noted that the constituent elements disclosed in the foregoing embodiments of the present invention are merely illustrative and are not intended to limit the scope of the present invention, and other structural changes that are easily conceivable, or alternatives to other equivalent elements. Changes should also be covered by the scope of the patent application for this case.

1‧‧‧Anti-electromagnetic interference components

10‧‧‧ cover

11‧‧‧ side panel

12‧‧‧Cut Department

13‧‧‧ corner

14‧‧‧ top board

15‧‧‧ first end

16‧‧‧second end

20‧‧‧Card fasteners

21‧‧‧Opening

22‧‧‧Drawing Department

23‧‧‧ pins

S‧‧‧Substrate

R‧‧‧ positioning slot

H, H’‧‧‧ Height

Claims (9)

An anti-electromagnetic interference component comprises: a cover body disposed on a substrate, the cover body is made of a conductive material, and the top surface of the cover body extends downward to form at least one side plate, and the bottom end of the at least one side plate And the at least two latching members are respectively bent to be inwardly bent, and the at least two latching members are connected to the base plate, and each of the latching members defines an opening for each of the latching portions to be buckled; When the cover is disposed on the substrate, the distance between the opposite ends of the cover and the substrate is not equal. The anti-electromagnetic interference component of claim 1, wherein a top surface end of each of the fastening members extends to form a suction portion. The anti-electromagnetic interference component of claim 1, wherein each of the latching members is substantially L-shaped and correspondingly disposed at a corner end of the top surface of the cover. The anti-electromagnetic interference component of claim 3, wherein the number of the at least two fasteners is two, and when the cover is disposed on the substrate, the two fasteners are located at a diagonal of the cover Below the end. The anti-electromagnetic interference component of claim 1 or 3, wherein each of the latching members protrudes downward to form at least one pin. The anti-electromagnetic interference component of claim 1, wherein the number of the at least two fasteners is four, and the two groups are divided into two groups of different heights. The anti-electromagnetic interference component of claim 1, wherein the top surface of the cover is a curved surface, a sloped surface or a sloped surface and a plane. The anti-electromagnetic interference component of claim 1, wherein the at least two latching members are two in a shape of a single shape, and when the cover is disposed on the substrate, the two latching members are correspondingly disposed on The top surface of the cover body is opposite to a first end and a second end. The anti-electromagnetic interference component according to claim 1, wherein the number of the at least two fasteners is three and is one of the first in-line type and the second one in the L-shaped second The first latching member and the second latching member are respectively disposed at a first end and a second end opposite to the top surface of the cover body when the cover is disposed on the substrate. Below it.