CN101340806B - Shielding device and method of manufacturing shielding device - Google Patents

Abstract

The invention provides a shielding device and a method used for preparing the shielding device. One demonstration embodiment provides a shielding device which is applicable to providing electromagnetic interference shielding for one or more electric parts on a substrate; on the whole, the shielding device comprises a frame and a cover. In the demonstration embodiment, the frame comprises a side wall which restricts at least an opening along the upper part of the frame; the side wall is designed to almost surround one or more electric parts on the substrate; the cover comprises an upper surface which basically covers the frame and is provided with at least an opening and a spring finger-shaped part which almost suspends downwards from the upper surface. The internal side of the side wall of the frame is provided with an internal locking part which is used for being locked with the spring finger-shaped part of the cover, thus installing at least part of the cover to the frame, basically covering at least one opening restricted by the frame and leading the cover to be electrically connected with the frame.

Description

Shielding device and method of manufacturing shielding device

technical field

The present invention relates generally to an electromagnetic interference (EMI) shielding arrangement, and more particularly to a shielding arrangement suitable for providing electromagnetic interference shielding for one or more electrical components on a substrate. Furthermore, the invention relates to a method for producing an electromagnetic interference shielding device.

Background technique

The statements in this section only provide background information related to the present disclosure and may not constitute prior art.

In normal operation, electronic/electrical components in equipment often generate undesired electromagnetic energy that can interfere with the operation of adjacent electronic/electrical components due to EMI transmission through radiation. In order to eliminate or at least mitigate the adverse effects caused by EMI, shielding enclosures/devices may be used to provide EMI shielding for electronic/electrical components.

A shielding device may include a two-part structure in which a cover is mounted to a frame. In fact, a two-part shield inevitably has a gap between the cover of the shield and the adjoining part of the frame, which can allow EMI to pass therethrough, thereby reducing the shielding effect. Currently, with the increasing frequency trend generated by more and more electronic components, in order to obtain the desired shielding effect and avoid RF (radio frequency) leakage from the gap, it is desirable that the cover located on the shielding device and the gap between the frame is reduced to as small as possible.

Again in the case of a two-part shield, in order to provide locking features/structures between the cover and the frame to mount the cover to the frame, typically a At least one of the side walls is provided with holes, slots or the like as locking means.

Contents of the invention

According to various aspects of the present disclosure, there are provided exemplary embodiments of shielding arrangements suitable for providing electromagnetic interference shielding for one or more electrical components on a substrate. In an exemplary embodiment, the shielding device generally includes a frame having sidewalls defining at least one opening along an upper portion of the frame, the sidewalls being configured to substantially surround the one or Multiple electrical components. A cover is configured to substantially cover the at least one opening of the frame. The cover includes an upper surface and spring fingers depending generally downwardly from the upper surface. The frame includes an internal locking member located at a position on the inner side of the side wall of the frame. The internal locking member is configured to interlockingly engage the spring fingers of the cover to at least partially mount the cover to the frame to substantially cover the at least one opening defined by the frame and The cover is electrically connected to the frame. The shielding means may be operable to shield the one or more electrical components on the substrate within an interior collectively defined by the frame, the cover and the substrate.

The locking means for at least partially mounting the cover to the frame is located substantially inside of the side walls of the frame and at a location substantially inward of the shield. Consequently, no holes, grooves, openings or the like can be provided on the side walls, which improves the EMI shielding performance and manufacturability of the two-part shielding arrangement.

The frame may include a stretch lip integrally formed with at least one side wall of the frame and extending substantially inboard of the at least one side wall. Here, the stretch lip comprises the inner locking part of the frame.

The spring finger of the cover may include a protrusion configured for interlocking engagement with the inner locking member of the frame. The protrusions may include bumps, catches, snaps, latches, spring fingers, detents, ribs, ridges, raised ramps, darts, lances, depressions, semi-depressions, combinations thereof, and the like. The inner locking member of the frame may include an arm extending generally downward from the tension lip. Additionally, the arms of the inner locking member of the frame may include openings configured to releasably receive the springs of the cover when the spring fingers are in interlocking engagement with the inner locking member. The protrusion of the finger.

The cover also includes a wall portion substantially downwardly depending from the upper surface of the cover. The wall portion is engageable with at least one side wall of the frame when the spring finger of the cover is in interlocking engagement with the internal locking member of the frame. Here, the engagement of the wall portion of the cover with the at least one side wall of the frame may provide electrical grounding between the cover and the frame. The spring finger of the cover may be located substantially inside of the wall portion of the cover. The at least one side wall of the frame that engages the wall portion of the cover may be located generally between the spring finger of the cover and the wall portion of the cover. In addition, the wall portion of the cover may include a contact member for resiliently engaging with the at least one side wall of the frame. The wall portion of the cover may be integrally formed with the upper surface of the cover.

The cover may comprise two or more spring fingers and two or more wall portions. Also, the frame may include two or more internal locking members, each configured to engage a corresponding one of the two or more spring fingers of the cover. join together.

The cover can be attached to, detached from, and reattached to the frame in a generally vertical orientation without impinging on areas outside the general footprint of the frame.

The side walls of the frame may have no mounting openings, so that the manufacturability of the shielding device and the electromagnetic interference shielding performance provided by the shielding device may be improved.

The locking portion of the frame may be configured to receive the spring fingers of the cover and at least partially mount the cover to the frame such that any gap between the cover and the frame is about 0.05 mm or smaller.

In another exemplary embodiment, a shielding device generally includes a frame securable to a substrate and having sidewalls defining at least one opening along an upper portion of the frame. A stretch lip extends from an upper portion of the side wall generally inboard of the side wall. A cover is configured for mounting to the frame. The cover has an upper surface and resilient spring fingers formed from the upper surface. The resilient spring fingers depend generally downwardly from the upper surface within an overall footprint defined by the upper surface. The resilient spring finger of the cover releasably engages at least a portion of the stretch lip of the frame at a location inboard of the side wall of the frame for at least partially retaining the frame. The cover is mounted to the frame. The upper surface of the cover extends over at least a portion of the tensile lip of the frame to substantially cover the at least one opening defined by the frame when the cover is mounted to the frame. In this embodiment, the shielding means may be operable to shield the one or more electrical devices on the substrate within the interior jointly defined by the frame, the cover and the substrate. parts are shielded.

In this exemplary embodiment, the cover is mounted to the frame substantially inboard of the side walls. Consequently, no holes, slots, openings or the like can be provided, which improves the shielding performance and manufacturability of the two-part shielding arrangement.

The cover may also include a resilient wall portion depending generally downwardly from the cover upper surface at a location adjacent the resilient spring finger of the cover. The resilient spring finger of the cover may be located substantially inside of the resilient wall portion of the cover such that at least a portion of a side wall of the frame passes through when the cover is mounted to the frame. Engaged to be received between the resilient spring finger and the resilient wall portion. Additionally, the cover may comprise two or more resilient spring fingers and two or more resilient wall portions. Each spring finger may be generally positioned adjacent a corresponding wall portion.

The stretch lip of the frame may include an internal locking member for engaging with all parts of the cover when the cover is positioned relative to the frame to cover the at least one opening defined by the frame. The resilient spring fingers releasably engage and at least partially mount the cover to the frame.

According to other various aspects of the present disclosure, there is provided an exemplary embodiment of a method of manufacturing an electromagnetic interference shielding device including a frame fixable to a substrate and a cover mountable to the frame, the electromagnetic interference shielding device comprising a Interference shielding means for shielding one or more electrical components on the substrate within the interior collectively defined by the frame, the cover and the substrate. In an exemplary embodiment, the method includes stretching a first piece of material to form the frame so as to integrally form the sidewalls and the stretch lip of the frame. The stretch lip extends from an upper portion of the side wall generally inboard of the side wall. The method also includes stretching a second piece of material to form the cover to integrally form the upper surface and wall portion of the cover. The wall portion extends generally downward from the upper surface of the cover. The method further includes forming a spring finger from an upper surface of the cover at a location adjacent to and substantially inboard of a wall portion of the cover such that the spring finger is positioned in relation to the wall portion of the cover. The stretching lips of the frame are interlockingly engaged to at least partially mount the cover to the frame.

The method also includes bending at least a portion of the stretch lip substantially downwardly to form an inner locking member to receive at least a portion of a spring finger of the cover to at least partially mount the cover to the frame. One or more protrusions may be formed on the spring fingers of the cover and corresponding one or more openings may be formed in the inner locking part of the frame for receiving the corresponding one or more openings. protrusions to at least partially mount the cover to the frame.

Further aspects of application of the present invention will become apparent from the description provided herein. It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.

Description of drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.

Figure 1 is a perspective view of an exemplary embodiment of a shielding device with the cover and frame separated;

2 is a partial enlarged perspective view showing an internal locking member of the frame of the shielding device shown in FIG. 1;

3 is a partial enlarged perspective view showing spring fingers of the cover of the shielding device shown in FIG. 1;

4 is a perspective view showing an engaged state of a spring finger of a cover of the shielding device shown in FIG. 1 and an internal locking part of a frame;

5 is a partially enlarged cross-sectional view showing the engaged state of the spring fingers of the cover and the inner locking member of the frame;

Figure 6 is a perspective view showing a frame with internal locking features in another exemplary embodiment of a shielding device.

Detailed ways

The following description is merely exemplary in nature and is not intended to limit the disclosure, application or use of the invention.

In the description, certain terms are used herein for reference only and therefore are not meant to be limiting. For example, terms such as "upper," "lower," "above," "under," "top," and "bottom" refer to directions in the drawings to which reference is made. Terms such as "front", "rearward", "rear", "bottom" and "side" describe the orientation of parts of a component within a consistent and arbitrary frame of reference and describe the component in question by contrast This frame of reference is made clear by the text and associated drawings. Such terms may include the words identified above, derivatives thereof and words of similar import. Similarly, the terms "first," "second," and other such numerals referring to structures do not imply a sequence or order unless clearly indicated by the context.

When introducing an element or feature and example embodiments, the articles "a," "an," "the," and "said" mean one or more of such element or feature. The terms "comprising", "comprising" and "having" are inclusive and mean that there may be additional elements or features other than those specifically mentioned. It is also to be understood that the method steps, processes and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically indicated as an order of performance. It should also be understood that additional or alternative steps may also be employed.

FIG. 1 shows an example of a shielding device 100 having a two-part construction. The shielding device 100 includes a cover 1 and a frame 2 , wherein the cover 1 is separated from the frame and can be mounted to the frame 2 .

The frame 2 has a side wall 21 and an opening 22 defined at its upper end by said side wall 21 . The illustrated embodiment includes four side walls 21, each generally straight as shown. Alternative embodiments may include frames with other numbers of side walls (eg, three side walls) depending on specific shielding requirements and conditions. In other exemplary embodiments, the shielding device may include a frame having non-straight sidewalls (eg, curved sidewalls). In any event, sidewall 21 is configured to generally surround one or more electrical components on a substrate (not shown).

The cover 1 has an upper surface 11 which substantially covers the opening of the frame 2 when the cover 1 is mounted to the frame 2 . The cover 1 also has spring fingers 12 depending substantially downwards from this upper surface 11 . The illustrated cover 1 comprises twelve spring fingers 12 . The cap 1 may have more or less than twelve spring fingers (ie one or more spring fingers) within the scope of the present disclosure.

The frame 2 includes an inner locking part 23 located at an inner side of the side wall 21 of the frame 2 . The frame 2 shown comprises twelve internal locking parts 23 . The frame 2 may include more or less than twelve internal locking members (ie, one or more internal locking members) within the scope of the present disclosure. The inner locking member 23 extends from the upper portion of the frame body and then substantially depends downwardly. The inner locking member 23 is configured to interlockingly engage with the spring fingers 12 of the cover 1 to at least partially mount the cover 1 to the frame 2 as shown in FIG. 5 .

The spring finger 12 of the cover 1 and the inner locking part 23 of the frame 2 may be formed on one or more sides of said cover 1 and frame 2 respectively, formed on two opposite sides of said cover 1 and frame 2, Or formed on all sides of the cover 1 and the frame 2 . Furthermore, on each side where the spring fingers 12 of the cover 1 and the inner locking part 23 of the frame 2 are formed, one or more spring fingers 12 and/or inner locking parts 23 may be provided. Specifically, as an example, the cover 1 may include two or more spring fingers 12 and the frame 2 may include two or more internal locking members 23 each configured to For interlocking engagement with a corresponding one of the two or more spring fingers 12 of said cover 1 .

When the cover 1 is mounted to the frame 2, the spring finger 12 of the cover 1 engages with the inner locking part 23 of the frame 2 so as to releasably lock the cover 1 and the frame 2 together and make the upper part of the cover 1 Surface 11 substantially covers opening 22 of frame 2 .

In the shielding device 100 shown, the side wall 21 of the frame 2 has no mounting openings for mounting the cover 1 to the frame 2 . Since there is no installation opening on the frame 2, the manufacturability of the shielding device 100 can be improved and the electromagnetic interference shielding performance provided by the shielding device 100 can be improved.

For example, the inner locking part 23 (see Fig. 2) on the frame 2 will engage the spring finger 12 (see Fig. 3) on the cover 1, which ensures that the cover 1 and the frame 2 have a minimum leakage gap (for example, less than about 0.05 mm, etc.), and the cover 1 and frame 2 will not be separated (eg, accidentally separated, etc.) when the shielding device 100 is used and/or tested. The "gap" refers to any space between the contact portions of the cover 1 and the frame 2 when the cover 1 is mounted to the frame 2 .

When the spring fingers 12 of the cover 1 are in contact with the frame 2 , the cover 1 can become electrically connected to the frame 2 , which can provide an electrical grounding function between the cover 1 and the frame 2 . Thus, the shielding device 100 may shield the one or more electrical components on the substrate (not shown) within the interior jointly defined by the frame 2, the cover 1 and the substrate (not shown).

In the shielding device 100 shown, the frame 2 and/or cover 1 are generally formed by drawing processes, but may also include some parts formed by shearing/punching processes and/or bending processes. For example, the spring fingers 12 of the cover 1 may be formed by cutting/stamping the spring fingers 12 from the upper surface 11 of the cover 1 and bending them down. This machining leaves apertures 13 in the upper surface 11 of the cover 1 , and the spring fingers 12 are bent downwards from the inside edge 131 of each respective aperture 13 , as shown in FIG. 3 .

Said aperture 13 provides a means for disengaging the spring finger 12 from the inner locking part 23 to gain access to the spring finger 12 when it is desired to remove the cover 1 from the frame 2 . For example, as shown in FIG. 4 , when the cover 1 is mounted to the frame 2 and the spring finger 12 is engaged with the inner locking member 23 , a portion of the frame 2 near the inner locking member 23 can be exposed from/through the aperture 13 to the outside. Therefore, by pressing (or camming, etc.) the part of the spring finger 12 of the cover 1 exposed to the outside from/through the aperture 13, or by pressing through the aperture 13 using a tool (eg, a washer, etc.) (or camming, etc.) spring finger 12 or pressing (or camming, etc.) between spring finger 12 and inner locking member 23 disengages engagement of spring finger 12 and inner locking member 23 .

Depending on the configuration of the cover 1 and frame 2, in operation, the cover 1 can be attached to, detached from and reattached to the frame 2 in a substantially vertical direction without impacting areas outside the overall footprint of the frame 2 . This may advantageously allow the cover 1 to be mounted on or removed from the frame 2 in a restricted area, requiring only little space for mounting and detachment of the cover 1 to the frame 2 . The lid 1 may be handled by a pick and place device, such as a vacuum operated pick and place device or the like, for mounting, detaching from and/or refitting to the frame 2 . It should be understood that the area outside the overall footprint of the frame 2 may include, for example, not only the area on the substrate outside the overall footprint of the frame 2 , but also the space vertically above this area.

An example of an operation for mounting the cover 1 to the frame 2 is as follows. The frame 2 may be fixed/attached/mounted to the substrate by eg welding or soldering the frame 2 to the substrate to position the frame 2 around one or more electrical components on the substrate. In order to mount the cover 1 to the frame 2 , the cover 1 is generally aligned with the frame 2 , in particular so that the upper surface 11 of the cover 1 is positioned to substantially cover the opening 22 of the frame 2 . Here, the spring finger 12 of the cover 1 is located in a position corresponding to the inner locking part 23 of the frame 2 . The cover 1 is then mounted to the frame 2 by pushing the cover 1 towards the frame 2 so that the spring fingers 12 of the cover 1 engage the internal locking parts 23 of the frame 2 .

An example of an operation for detaching the cover 1 from the frame 2 is as follows. To remove the cover 1 from the frame 2 a tool such as a spacer, a rigid piece or even a screwdriver can be inserted through the aperture 13 formed in the cover 1 when the spring fingers 12 are punched out of the cover 1 . The tool can then be moved (e.g., pushed, etc.) between the spring finger 12 of the cover 1 and the internal locking member 23 of the frame 2 to facilitate actuation (e.g., camming, etc.) of the spring finger 12 from The inner locking part 23 is disengaged, thereby disengaging the spring finger 12 of the cover 1 from the inner locking part 23 of the frame 2 .

In the cover 1 , the spring finger 12 is located on the inside of the outer edge/boundary of the upper surface 11 of the cover 1 . That is, if the cover is formed without wall portions extending downwardly from the edge of the upper surface 11, the spring fingers 12 are formed a distance inwardly from the outer edge of the upper surface 11 of the cover. Whereas if the cover is formed with a wall portion, the spring finger 12 is formed at a distance inwardly from the boundary of the upper surface 11, which may be the upper surface 11 of the cover 1 and the wall of the cover 1 Stretch wire between sections 14.

In an exemplary embodiment, also shown in FIG. 2 , the frame 2 may include a stretch lip 23 ′ integrally formed with at least one side wall 21 of the frame 2 and in said At least one side wall extends substantially inwardly. For example, the frame 2 may be formed by stretching so that the stretch lip 23' of the frame 2 is integrally (or integrally) formed with the side wall 21 of the frame 2, and the stretch lip 23' of the frame 2 and the side wall 21 stretch lines between them. In addition, the aforementioned internal locking member 23 is arranged on (e.g. formed from/with, etc.) the stretched lip 23' of the frame 2. Furthermore, each side wall 21 of the frame 2 may be integrally formed with an adjacent side wall of the frame 2, so that the side walls 21 may be formed from one piece of material.

In another exemplary embodiment, the spring finger 12 of the cover as shown in FIG. 3 includes a protrusion 121 configured for interlocking engagement with the inner locking member 23 of the frame 2 . The protrusions 121 may be formed as engaging features, which may include bumps, catches, snaps, latches, spring fingers, detents, ribs, ridges, raised ramps, darts, lances, dimples, semi-recesses, and Combinations of the above structures and the like.

In the frame 2 as shown in FIG. 2, the inner locking member 23 includes an arm 233 extending substantially downward from the stretch lip 23', wherein the arm 233 may be formed as a part of the stretch lip 23' and then extends toward the Bend down. The arm 233 of the inner locking member 23 of the frame 2 includes an opening 231 configured to releasably receive the spring finger of the cover 1 when the spring finger 12 is in interlocking engagement with the inner locking member 23 12 protrusions 121 . The opening 231 of the inner locking member 23 may comprise a recess, a void, a cavity, a slit, a groove, a hole (as shown in FIG. 2 ), a dimple, a notch (as shown in FIG. 6 ), combinations thereof, etc., as long as It is sufficient that it can receive and engage the protrusion 121 of the spring finger 12 of the cover 1 (or other formations thereon).

At the lower end of the arm 233, a bent edge 232 extends in a substantially horizontal direction, for example by being bent from this arm 233, so as to prevent the end of the spring finger 12 of the cover 1 from excessively entering the frame when the cover 1 is mounted on the frame 2 2 spaces inside. The bent edge 232 also protects the electrical components on the substrate surrounded by the frame 2 from coming into contact with or being damaged by the spring fingers 12 .

In another exemplary embodiment, said spring finger 12 has elastic properties for pressing the protrusion 121 of the spring finger 12 into the opening 231 of the arm 233 of the inner locking part 23 . In order to facilitate the engagement of the protrusion 121 and the opening 231, the lower portion of the protrusion 121 can operate as a camming surface for initially pushing/activating the spring finger 12 away from the arm 233 of the internal locking part 23 of the frame 2 so that the protrusion 121 121 moves over the arm 233 of the inner locking member and enters the opening 231 of the arm 233 of the inner locking member.

In yet another exemplary embodiment, the positions of the opening 231 and the protrusion 121 may be interchanged. That is, the cover 1 may include the opening, and the frame 2 may include the protrusion. Referring to the above, the structure in which the opening is provided on the cover 1 and the protrusion is provided on the frame 2 can achieve the same technical effect, which is clear to those skilled in the art. In addition, it may also be configured that both the frame and the cover may include openings and protrusions.

In the illustrated embodiment, as shown in FIGS. 1 , 3 to 5 , the cover 1 also includes a wall portion 14 substantially downwardly depending from the upper surface 11 of the cover 1 . For example, the wall portion 14 of the cover 1 may be integrally formed with the upper surface 11 of the cover 1 . The cover 1 may comprise two or more wall sections 14 . In the cap 1 , the spring finger 12 is located inside the stretch line of the cap 1 formed between the upper surface 11 of the cap 1 and the wall portion 14 of the cap 1 . The wall portion 14 engages at least one side wall 21 of the frame 2 when the spring finger 12 of the cover 1 is in interlocking engagement with the inner locking part 23 of the frame 2 . The engagement of the wall portion 14 of the cover 1 with the at least one side wall 21 of the frame 2 can help keep the cover 1 and frame 2 mounted and can provide electrical grounding between the cover 1 and the frame 2 . In the frame 2 , said at least one side wall 21 of the frame 2 engaging the wall portion 14 of the cover 1 is located substantially between the spring finger 12 of the cover 1 and the wall portion 14 of the cover 1 .

In the shielding device 100 , when the cover 1 is mounted to the frame 2 , the wall portion 14 of the cover 1 has elastic properties for pressing/squeezing/engaging the outer surface 234 of the side wall 21 of the frame, as shown in FIG. 5 . In particular, the wall portion 14 of the cover 1 may comprise a contact member 15 for elastically engaging the outer surface 234 of said at least one side wall 21 of the frame 2 .

In the wall portion 14 of the cover 1 at least one notch/groove/cutout may be provided which is located between the respective sections of the wall portion 14 and which extends in a direction substantially perpendicular to the length direction of the wall portion 14, i.e. That is, the wall portion 14 extends in a direction substantially perpendicular to the upper surface 11 of the cover 1 when bent from the upper surface 11 of the cover 1, so as to divide the wall portion 14 into several segments. Each segment extends integrally from the upper surface 11 of the cover 1 . By dividing the wall portion 14 into several segments, it is thus possible to provide several separate contacts of the wall portion 14 of the cover 1 with the outer surface 234 of the frame 2, so as to avoid the An uncontacted gap between the wall portion 14 (in particular the contact member 15 ) and the outer surface 234 caused by undue stress in the wall portion 14 . In addition, dividing the wall portion 14 into several segments also makes it possible to provide a suitable contact force between the wall portion 14 of the cover 1 and the outer surface 234 of the frame.

When the wall portion 14 of the cover 1 is integrally formed with the upper surface 11 of the cover 1, the cover 1 may be integrally formed to have a unitary construction, wherein the upper surface 11, wall portion 14 and spring fingers 12 may be made of, for example, an electrically conductive material. integrally formed from a single piece of material. Specifically, the wall portions 14 of the cover 1 may be integrally formed with the upper surface 11 of the cover 1 by stretching so as to form stretch lines between each wall portion 14 of the cover and the upper surface 11 of the cover. The spring fingers 12 may be integrally formed from the upper surface 11 by eg stamping and bending (or cutting and bending) from said upper surface 11 . In an exemplary embodiment, the spring fingers 12 are cut or punched in the upper surface 11 prior to the stretching process and then bent down after the stretching process. Alternatively, and within the scope of the present disclosure, the spring fingers 12 may be formed from the upper surface 11 after a drawing process.

The disclosure of the present invention also provides a method of manufacturing an electromagnetic interference shielding device 100, the electromagnetic interference shielding device 100 includes a frame 2 that can be fixed to a substrate (not shown) and a cover 1 that can be mounted to the frame 2, the electromagnetic interference shielding The device 100 serves to shield one or more electrical components located on said substrate within the interior jointly defined by frame 2, cover 1 and said substrate.

The method may comprise: the step or process of forming a frame 2, wherein the frame 2 has side walls 21 and a stretched lip 23'; the step or process of forming a cover 1, wherein the cover 1 has a wall portion 14 and an upper surface 11; and The step or process of forming the spring fingers 12 on the cover 1 .

The frame forming step or procedure may comprise stretching a first piece of material to form the frame 2 so as to integrally form the side walls 21 and the stretched lip 23' of the frame 2. The stretch lip 23' extends from the upper portion of the side wall 21 substantially inwardly of the side wall 21.

The lid forming step or procedure may comprise stretching the second piece of material to form the lid 1 so as to integrally form the upper surface 11 and the wall portion 14 of the lid 1 . Said wall portion 14 extends substantially downwards from the upper surface 11 of the cover 1 .

The spring finger forming step or procedure may comprise forming the spring finger 12 from the upper surface 11 of the cover 1 at a position adjacent to and substantially inboard of a wall portion 14 of the cover 1 such that the spring finger The shape 12 is positioned in interlocking engagement with the stretching lip 23 ′ of the frame 2 in order to at least partially mount the cover 1 to the frame 2 .

The first and second pieces of material may be formed as blanks from one or more larger sheets of electrically conductive material before stretching the pieces of material to form the frame 2 and cover 1 . Additionally, the process of forming the piece of material as a blank may include stamping or chemical milling the piece of material as a blank from a larger sheet of material one or more times. Wide range of materials available for cover 1 and frame 2 such as cold rolled steel, nickel-silver alloy, copper-nickel alloy, stainless steel, tin-plated cold-rolled steel, tin-plated copper alloy, carbon steel, brass, copper, aluminum, copper Beryllium alloy, phosphor bronze, steel, and alloys thereof, or any other suitable conductive and/or magnetic material, such as plastic material coated with a conductive material.

In an exemplary embodiment of the method, at least a portion of the stretch lip 23' is bent substantially downwards to form an inner locking member 23 to receive at least a portion of the spring finger 12 of the cap 1, thereby at least partially Install the cover 1 to the frame 2 smoothly.

In another exemplary embodiment of the method, one or more protrusions 121 are formed on the spring fingers 12 of the cover 1 and corresponding one or more openings are formed in the inner locking part 23 of the frame 2 231 for receiving the corresponding one or more protrusions 121 so as to at least partially mount the cover 1 to the frame 2 .

The cover and/or frame may be constructed of different materials and/or different dimensions than disclosed above, depending, for example, on factors such as the electrical components to be shielded, space considerations in the overall electronic device, EMI shielding and heat dissipation requirements, and other factors. Specific applications of the class, thus the materials and dimensions provided here are for explanatory purposes only.

The description of the present disclosure is of an exemplary nature only, and thus various modifications that do not depart from the gist of the present disclosure should be within the scope of the present disclosure. Such variations should not be regarded as a departure from the spirit and scope of this disclosure.

Claims (18)

1. screening arrangement, this screening arrangement is applicable to the one or more electric components on the substrate provide electromagnetic interference shield, and comprises:

Framework, this framework has the sidewall that limits at least one opening along the top of this framework, and said sidewall is configured to roughly center on the said one or more electric components on the said substrate, and

Lid, this lid have the upper surface of said at least one opening that is configured to cover basically said framework and the spring finger that roughly dangles from this upper surface downwards,

Said framework includes the internal lock parts of the inboard location of the sidewall that is positioned at said framework; Said internal lock unit architecture becomes to engage with the spring finger interlocking of said lid; Thereby at least in part said lid is installed to said framework; To cover said at least one opening of limiting said framework basically and said lid be electrically connected to said framework; Said framework includes the stretching lip; At least one sidewall in the sidewall of this stretching lip and this framework integrally form and said at least one sidewall roughly in the side extend, said stretching lip comprises said internal lock parts, said internal lock parts include from said stretching lip roughly to the arm that extends below;

Thereby said screening arrangement operationally is used for the said one or more electric components that are positioned on the said substrate that are positioned among the inside that is limited jointly said framework, said lid and said substrate are shielded.

2. screening arrangement according to claim 1 is characterized in that, the spring finger of said lid includes projection, and said projection is configured for engaging with the said internal lock parts interlocking of said framework.

3. screening arrangement according to claim 2; It is characterized in that; The arm of said inside of frame Lock Part includes opening, and said open construction becomes to be used for when the spring finger of said lid engages with the interlocking of said internal lock parts, releasably receiving the projection of said spring finger.

4. screening arrangement according to claim 1; It is characterized in that; Said lid also includes the wall part that roughly dangles from the upper surface of said lid downwards; Said wall part engages with at least one sidewall of said framework when the spring finger of said lid engages with said inside of frame Lock Part interlocking, thus said at least one sidewall of the wall part of said lid and said framework engage the electrical connection that provides between said lid and the said framework.

5. screening arrangement according to claim 4; It is characterized in that; The spring finger of said lid roughly is positioned at the side of the wall part of said lid, and said at least one sidewall that engages with wall part said lid said framework is roughly between the wall part of the spring finger of said lid and said lid.

6. screening arrangement according to claim 4 is characterized in that the wall part of said lid includes contact component, and said contact component is used for flexibly engaging with said at least one sidewall of said framework.

7. screening arrangement according to claim 4 is characterized in that, the wall part of said lid and the upper surface of said lid integrally form.

8. screening arrangement according to claim 4; It is characterized in that; Said lid includes two or more spring fingers and two or more wall parts; And said framework includes two or more internal lock parts, and the corresponding interlocking that each internal lock parts all is configured in said two or more spring fingers with said lid engages.

9. screening arrangement according to claim 1 is characterized in that, said lid can be installed to said framework along the direction of approximate vertical, from the dismounting of said framework and be installed to said framework again, and can not collide the zone beyond the whole area of coverage of said framework.

10. screening arrangement according to claim 1 is characterized in that the sidewall of said framework does not have construction opening, thus the manufacturability of this screening arrangement and can improve by the electromagnetic interference shield performance that this screening arrangement provides.

11. screening arrangement according to claim 1; It is characterized in that; Said inside of frame Lock Part is configured to receive the spring finger of said lid and at least in part said lid is installed to said framework, makes any gap between said lid and the said framework for being less than or equal to 0.05 millimeter.

12. a screening arrangement, this screening arrangement are applicable to the one or more electric components on the substrate provide electromagnetic interference shield, and comprise:

Framework, this framework can be fixed to said substrate, and the stretching lip that has the sidewall that limits at least one opening along the top of this framework and roughly extend in the interior side of said sidewall from the top of said sidewall, an arm from said stretching lip roughly to extending below; And

Lid, this lid is configured for being installed to said framework, the flexible spring finger that this lid has upper surface and forms from this upper surface, said flexible spring finger roughly dangles downwards from this upper surface in the whole area of coverage that is limited said upper surface,

The said flexible spring finger of said lid releasably engages with at least a portion of the stretching lip of said framework at the inboard location place of the sidewall of said framework; Be used at least in part said lid being installed to said framework; When said lid is installed to said framework; The upper surface of said lid extends at least a portion of the stretching lip of said framework, thereby covers said at least one opening that is limited said framework basically

Thereby said screening arrangement operationally is used for the said one or more electric components that are positioned on the said substrate that are positioned among the inside that is limited jointly said framework, said lid and said substrate are shielded.

13. screening arrangement according to claim 12; It is characterized in that; Said lid also comprises flexible wall part; Upper surface from said lid roughly dangles downwards said flexible wall part in the position of the said flexible spring finger of contiguous said lid; And the said flexible spring finger of said lid is positioned at the roughly side of the said flexible wall part of said lid, thereby at least a portion of the sidewall of said framework is received between said flexible spring finger and the said flexible wall part through joint when said lid is mounted to said framework.

14. screening arrangement according to claim 13; It is characterized in that; Said lid includes two or more flexible spring fingers and two or more flexible wall parts, and each spring finger roughly is positioned at the position of contiguous corresponding wall part.

15. screening arrangement according to claim 12; It is characterized in that; The stretching lip of said framework includes the internal lock parts; Said internal lock parts are used for when said lid is positioned to cover said at least one opening that is limited said framework with respect to said framework, releasably engages the said flexible spring finger of said lid and at least in part said lid being installed to said framework.

16. method of making electromagnetic interference shielding device; This electromagnetic interference shielding device comprises framework that can be fixed to substrate and the lid that can be installed to this framework; This electromagnetic interference shielding device is used for the one or more electric components that are positioned on the said substrate that are positioned among the inside that is limited jointly said framework, said lid and said substrate are shielded, and this method comprises:

First material pieces is stretched to form said framework so that integrally form the sidewall and the stretching lip of said framework, this stretching lip from the top of said sidewall said sidewall roughly in the side extend;

Second material pieces is stretched to form said lid so that integrally form the wall part and the upper surface of said lid, said wall part from the upper surface of said lid roughly to extending below; And

From the upper surface of said lid the wall part of contiguous said lid and this wall part roughly in the position formation spring finger of side; Make that this spring finger is positioned to engage with the stretching lip interlocking of said framework, thereby at least in part said lid is installed to said framework.

17. method according to claim 16; It is characterized in that; This method also comprises: at least a portion that roughly bends said stretching lip downwards; Receive at least a portion of the said spring finger of said lid to form the internal lock parts, thereby at least in part said lid is installed to said framework.

18. method according to claim 17 is characterized in that, this method also comprises:

On the said spring finger of said lid, form one or more projections; And

In the said internal lock parts of said framework, form corresponding one or more openings, be used to receive corresponding said one or more projections, thereby at least in part said lid be installed to said framework.

Images