JP5224407B2 - Shield case and electronic equipment - Google Patents

Description

  The present invention relates to a shield case that includes a shield frame and a shield cover that can be attached to and detached from the shield frame, and shields electromagnetic waves, and an electronic device that includes the shield case.

  In an electronic device such as a mobile phone, a shield case that contains an electronic component and shields the electromagnetic wave is used to prevent electromagnetic waves generated by the electronic component from affecting other electronic components.

  Further, in an electronic device in which an electronic component is accommodated in a shield case, there is a shield case that can be opened and closed because an inspection may be performed after the electronic device is assembled. In particular, a shield case for a wireless communication terminal is frequently opened and closed for product inspection. Therefore, a shield case having a shield frame and a shield cover that can be attached to and detached from the shield frame has been proposed.

  FIG. 6 shows the shield case shown in FIG. 14 of Japanese Patent Laid-Open No. 2008-218526 (hereinafter referred to as Patent Document 1). The shield case 60 includes a shield frame 70 and a lid-shaped shield cover 60. The shield frame 70 has a frame shape surrounding the electronic component 90 mounted on the wiring board 80.

  As shown in FIG. 6, the peripheral edge 64 of the shield cover 60 is bent. When the shield cover 60 is attached to the shield case 70, the peripheral edge portion 64 of the shield cover 60 covers the side surface 74 facing the outside of the frame-shaped shield case 70. A hole 62 is provided in the side surface of the peripheral edge 64 of the shield cover 60 so that the shield cover 60 is fixed to the shield case 70, and a minute protrusion corresponding to the hole 62 is provided in the side surface 74 of the shield frame. Point 72 is provided.

  Further, FIG. 2 of Patent Document 1 discloses a shield case including a frame-shaped shield frame that surrounds the periphery of an electronic component mounted on a wiring board, and a shield cover that covers an upper opening of the shield frame. ing. The shield cover is attached above the shield case. A cutout portion is formed on the upper surface of the shield frame, and an elastic piece that engages with the cutout portion is formed on the shield cover. Furthermore, the peripheral part of the shield cover is bent so as to cover the side surface of the shield case.

JP 2008-218526 A

  With the miniaturization of electronic devices, it is required to mount electronic components with high density. Therefore, in a small electronic device, it is required to reduce the size of the shield case, that is, to reduce the width and height.

  In the shield case shown in FIG. 6, since structures (holes 62 and protrusions 72) are formed on the peripheral edge 64 of the shield cover 60 and the side surface 74 of the shield frame 70, an area for forming the structure is provided. It is necessary to ensure. Therefore, there exists a subject that the height of the shield cover 60 and the shield frame 70 becomes high.

  Further, the peripheral edge portion 64 of the shield cover is bent, and the peripheral edge portion 64 covers the side surface 74 of the shield case. Therefore, there is also a problem that the width of the shield case is increased by the thickness of the peripheral edge portion 64 of the shield cover. Note that Patent Document 1 does not mention any problem of miniaturization of the shield case.

  Also in the shield case shown in FIG. 2 of Patent Document 1, since the peripheral portion of the shield cover is bent, there is a problem that the shield case becomes larger by the thickness of the peripheral portion of the shield cover. Moreover, since it is necessary to form the elastic piece of a complicated shape in a shield cover, the manufacturing process becomes complicated.

  An object of the present invention is to provide a shield case that can solve any one of the above problems, and an electronic device including the shield case. An example of the purpose is to provide a shield case capable of reducing the width and height of the shield case.

  A shield case in one embodiment of the present invention includes a frame-shaped shield frame provided on a substrate and a shield cover that covers a region surrounded by the shield frame, and accommodates electronic components mounted on the substrate. The shield cover is a flat plate configured to be slidable along the upper surface of the shield frame. The shield frame protrudes upward from the upper surface of the shield frame, and has a plurality of protrusions that hold the shield cover slidably between the upper surface of the shield frame.

  An electronic device according to the present invention includes the above-described shield case and an electronic component housed inside the shield case.

  According to the present invention, the width and height of the shield case can be reduced.

It is a schematic perspective view of the shield case which concerns on one Embodiment of this invention. It is a schematic top view of the shield case shown in FIG. It is a schematic perspective view which shows a mode at the time of attaching a shield cover to a shield frame. It is a schematic top view which shows a mode at the time of attaching a shield cover to a shield frame. It is a schematic side view which shows a mode at the time of attaching a shield cover to a shield frame. It is a schematic perspective view of the shield case in a prior art. It is a schematic side view which shows the mode at the time of attaching a shield cover to a shield frame in the shield case of a prior art. It is a schematic side view of the shield case of a prior art.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view of a shield case 10 according to an embodiment of the present invention, and FIG. 2 is a top view of the shield case 10. The shield case 10 includes a shield cover 20 and a shield frame 30. 3, 4, and 5 are a perspective view, a top view, and a side view showing how the shield cover 20 is attached to the shield frame 30.

  The shield frame 30 is provided on a substrate 40 such as a wiring substrate, and is configured in a frame shape. The shield cover 20 is configured to be slidable along the upper surface 36 of the shield frame 30. The shield cover 20 is configured to cover the shield frame 30 and be detachable from the shield frame 30. The shield cover 20 and the shield frame 30 are made of a metal member and block electromagnetic waves. An electronic component 50 mounted on the substrate 40 is accommodated in the shield case 10. The shield cover 20 of this embodiment is a flat plate, and the periphery of the shield cover 20 is not bent.

  7 and 8 are side views of the conventional shield case shown in FIG. Since the peripheral edge portion 64 of the shield cover 60 covers the side surface of the shield frame 70, the shield cover 60 is wider than the shield frame 70 (see symbol D in the figure). Therefore, the width of the shield case increases by the thickness of the peripheral edge portion 64 of the shield cover.

  On the other hand, since the shield cover 20 of this embodiment is a flat plate, the width of the shield frame 30 becomes the width of the shield case 10. Therefore, the width of the shield case 10 can be reduced. As a result, another potential component 52 can be mounted on the substrate 40 in the vicinity of the shield case, and high-density mounting of electronic components on the substrate 40 can be realized. The width of the shield frame 30 can be arbitrarily designed according to the size of the electronic component 50 accommodated therein.

  Furthermore, since the shield cover 20 is a flat plate and is not bent, the shield cover 20 can be easily manufactured and the manufacturing cost can be reduced.

  In the present embodiment, the shield frame 30 has a plurality of L-shaped projections 34 protruding upward from the upper surface 36 of the shield frame. The L-shaped protrusion 34 protruding from the two opposite ends of the shield frame 30 abuts on the edge along the sliding direction S of the shield cover 20, and guides and holds the shield cover 20 so as to be slidable. Further, when the shield cover 20 is attached to the shield frame 30, the shield cover 20 is held by the upper surface 36 of the shield frame 30 and the L-shaped protrusion 34.

  According to the above configuration, a structure (such as a protrusion or an opening) for holding the shield cover 20 is not necessary on the side surface 38 of the shield frame 30 that faces the outside of the frame. Therefore, the side surface of the shield frame 30 may be a flat surface. In this case, the height to the upper surface 36 of the shield frame 30 can be arbitrarily designed according to the electronic component 50 accommodated therein, and the height of the shield case 10 can be minimized.

  As shown in FIGS. 7 and 8, in the shield case of the prior art, structures (projection points 62 and holes 72) exist on the peripheral edge portion 64 of the shield cover 60 and the side surface 74 of the shield case 70. According to the experiment by the present inventor, in order to appropriately fix the shield cover 60 to the shield case 70, the width of the protrusion 62 in the direction orthogonal to the substrate surface is at least about 0.7 mm, and the width of the hole 62 is Needs to be at least about 0.6 mm. Therefore, the height of the peripheral portion 64 of the shield cover 60 is at least about 1.5 mm (see FIG. 7). When the shield cover 60 is attached to the shield case 70, the shield frame 70 needs to be designed to be higher by at least about 0.3 mm so that the peripheral edge portion 64 of the shield cover does not contact the wiring board 80. Yes (see FIG. 8). As a result, the shield case has a height of 1.8 mm or more.

  The height of the shield case 10 of the present embodiment is determined by the sum of the height to the upper surface 36 of the shield frame 30 and the height of the L-shaped protrusion 34 protruding from the upper surface of the shield case 30. Here, the height to the upper surface 36 of the shield frame 30 can be arbitrarily designed according to the height of the internal electronic component 50. Therefore, the height of the shield case 10 can be less than 1.8 mm. The height of the shield case 10 actually manufactured was 1.5 mm (see FIG. 5).

  In the example shown in FIGS. 2 and 3, the L-shaped protrusion 34 is preferably provided also on an end surface that intersects the slide direction S on the downstream side of the slide direction S. The L-shaped protrusion 34 comes into contact with the shield cover 20 and stops the sliding of the shield cover 20.

  It is preferable that a minute projection point 32 is formed on the upper surface of the shield frame 30, and a hole 22 corresponding to the projection point 32 is formed in the shield cover 20. The hole 22 may penetrate the shield cover 20 or may not penetrate. Thereby, the shield cover 20 is positioned with respect to the shield frame 30 and is accurately held by the shield frame 30.

  Furthermore, the shield cover 20 preferably has a tab 24 so that the shield cover 20 can be easily slid and removed from the shield frame 30.

  Instead of the example shown in FIGS. 2 and 3, a hole may be formed on the upper surface of the shield frame 30, and a protrusion point corresponding to the hole may be formed on the shield case.

  An electronic apparatus according to the present invention includes the shield case 10 and an electronic component housed in the shield case 10. An example of such an electronic device is a thin wireless communication terminal such as a PCMCIA card. The PCMCIA card has a thickness of about 2 mm to 3 mm, and it is necessary to reduce the height of the shield case installed in the PCMCIA card. As described above, since the height of the shield case 10 can be reduced, it is preferably used for a thin wireless communication terminal such as a PCMCIA card.

  Although the preferred embodiments of the present invention have been presented and described in detail above, the present invention is not limited to the above-described embodiments, and it is understood that various changes and modifications can be made without departing from the gist. I want to be.

DESCRIPTION OF SYMBOLS 10 Shield case 20 Shield cover 22 Hole part 24 Tab 30 Shield frame 32 Projection point 34 L-shaped projection part 36 Shield frame upper surface 38 Shield frame side surface 40 Substrate

Claims (5)

A frame-shaped shield frame provided on a substrate, a shield cover that covers a region surrounded by the shield frame, and a shield case that accommodates electronic components mounted on the substrate,
The shield cover is a flat plate configured to be slidable from one end side to the other end side of the shield frame along the upper surface of the shield frame .
The shield frame is a protruding portion protruding upward from the upper surface of the shield frame, a plurality of holding the shield cover slidably while sandwiching said shield cover between the upper surface of the shield frame Has a protrusion,
Wherein the plurality of projections, hold the both edges along the sliding direction of said shield cover,
A plurality of projection points are formed on one of the upper surface of the shield frame and the shield cover, and a plurality of projection points corresponding to the plurality of projection points on the other of the upper surface of the shield frame and the shield cover. A hole is formed,
The at least one pair of projecting points and holes among the plurality of projecting points and the plurality of hole portions are arranged at an end on the back side in a direction in which the shield cover is removed from the shield case. Case.   The shield case according to claim 1, wherein a side surface of the shield frame facing the outside of the frame is a flat surface. Wherein the projection point is formed on the upper surface of the shield frame,
Wherein the outer peripheral portion of the shield cover, front Kiana portion is formed, a shield case according to claim 1 or 2. Wherein the hole is formed on the upper surface of the shield frame,
Wherein the outer peripheral portion of the shield cover, front Ki突 origin is formed, a shield case according to claim 1 or 2.   An electronic device comprising: the shield case according to claim 1; and an electronic component housed in the shield case.

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