KR101454485B1 - Shield can of mobile phone - Google Patents

Abstract

A shield can is interposed between a rear case of a portable terminal and a key PCB to shield electromagnetic interference or radio frequency interference. The shield can includes a plurality of rear case contact reinforcing embossing projections, a plurality of key PCB contact reinforcing embossing projections, And / or a plurality of crimped embossing projections to strengthen the electrical connection by contact between the shield can, the rear case and the key PCB without the aid of a separate gasket or conductive tape, so that even if there is a slight manufacturing tolerance in the components, The case and the key PCB can be more efficiently and uniformly connected to the main board and ground so that the wireless cancellation of the wireless performance of the portable terminal can be achieved while the manufacturing cost and the manufacturing time can be shortened. to provide.

Portable terminal, rear case, key PCB, shield can, electromagnetic interference, embossing projection

Description

SHIELD CAN OF MOBILE PHONE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield can of a portable terminal, and more particularly, to a shield can be interposed between a rear case of a portable terminal and a key PCB to shield electromagnetic interference or radio frequency interference.

2. Description of the Related Art Generally, a portable terminal has a main board having a plurality of chips mounted on a printed circuit board, and the electronic circuit of the main board has electromagnetic interference (EMI) Frequency Interference. Accordingly, various types of shielding structures are disclosed for shielding such interference and protecting circuit components, and a shield can is used as an example of such a shielding structure.

1 is a perspective view showing an example of a shield can according to the prior art. As shown in FIG. 1, the shield can 30 according to the related art is interposed between a rear case 20 and a key PCB 40 of a portable terminal.

The shield can 30 is provided at one side thereof with a separating wall 31 for partitioning the accommodation space corresponding to the position of each chip of the main board (not shown), so that the interference due to electromagnetic waves or radio frequency Thereby preventing the malfunction of the device or the damage of the component which may be caused by such interference.

A battery mounting part 32 on which the battery 10 to be inserted into the battery receiving groove 22 provided in the rear case 20 of the portable terminal is mounted is provided on the other side of the shield can 30.

In recent years, an antenna of a portable terminal is installed inside a case, and a minute current flows in a case of a conductive material, so that the case also operates as an antenna. Therefore, among the above cases, the rear case 20 must be grounded to the main board or otherwise floated, resulting in deterioration of wireless performance. Also, the key PCB 40 should be grounded to the main board.

In the case of the shield can 30 according to the related art described above, the ground connection between the rear case 20 and the main board is mainly a metallic boss for fastening the shield can 30 and the rear case 20 Not only such a ground connection is not sufficient but also because of the manufacturing tolerances of the shield can 30 and the rear case 20, There is a problem that it is difficult to expect stable quality of the finished product as a finished product due to the problem that the connection becomes uneven. In addition, a separate gasket or conductive tape 42 is required to connect the key PCB 40 and the main board to the ground, and the gasket or conductive tape 42 must be manually attached, There has been a problem that the process is delayed.

SUMMARY OF THE INVENTION The present invention has been made to overcome the disadvantages of the prior art as described above, and it is an object of the present invention to improve electrical connection by contact between a shield can, a rear case and a key PCB without using a separate gasket or conductive tape, The rear case and the key PCB can be more efficiently and uniformly connected to the main board through the ground even if the tolerance is somewhat present, so that it is possible to reduce the manufacturing cost and the manufacturing time while preventing the deterioration of the wireless performance of the portable terminal The present invention provides a shield can of a portable terminal.

According to an aspect of the present invention, there is provided a shield can, which is interposed between a rear case of a portable terminal and a key PCB to shield electromagnetic interference or radio frequency interference, And a plurality of rear case reinforcing embossing projections formed at predetermined intervals in a portion of the rear case in contact with the edge of the battery accommodating portion of the rear case in which the battery is accommodated, And a plurality of key board PCB contact reinforcing embossing projections formed on the opposite side of the surface provided with the rear case contact reinforcing embossing projections to be in contact with the key PCB at regular intervals.

The battery pack may further include a plurality of pressure-contact embossing protrusions that are pressed by the battery at a portion in contact with the battery.

The plurality of key PCB contact reinforcing embossing projections are arranged on the opposite surface along a pattern formed by the plurality of rear case contact reinforcing embossing projections.

The plurality of key board PCB contact reinforcing embossing projections and the plurality of rear case contact reinforcing embossing projections are arranged in a zigzag fashion.

According to the shield can 100 of the portable terminal according to the present invention having the above-described configuration, the plurality of rear case-reinforcing embossing projections 130, the plurality of key PCB-reinforcing embossing projections The electrical connection between the shield can 100 and the rear case 200 and the key PCB 300 can be performed electrically without using a separate gasket or conductive tape through the plurality of crimped embossing projections 150 and / It is possible to more efficiently and uniformly connect the rear case 200 and the key PCB 300 to the main board even though there is a slight manufacturing tolerance in the components, There is an advantage that it is possible to reduce the manufacturing cost and the manufacturing time while preventing deterioration of the wireless performance of the terminal.

Hereinafter, a preferred embodiment of a shield can of a portable terminal according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 2 is a perspective view of a shield can of the portable terminal according to the present invention, FIGS. 3A and 3B are a partial plan view and a rear view of the shield can shown in FIG. 2, FIG. 5 is a side view of the shield case shown in FIG. 4 in a state where it is coupled with the rear case and the key PCB. FIG.

2 to 5, the shield can 100 of the portable terminal according to the present invention is basically sandwiched between the rear case 200 of the portable terminal and the key PCB 300, To shield radio frequency interference.

The shield can 100 is provided with a separation wall 110 for partitioning a space in which chips (not shown) of the main board are received, thereby preventing interference caused by radio waves or electromagnetic waves emitted from the chips of the main board Thereby preventing malfunction of the device or damage to the device caused by such interference, and is connected to the main board through the ground.

2, the shield can 100 of the portable terminal according to the present invention is configured such that a portion of the shield can 100 that contacts the battery housing portion edge 212 of the rear case 200, And a plurality of rear case-reinforcing embossing projections (130) formed at intervals. Reference numeral 210 denotes a battery accommodating portion provided in the rear case 200, and 120 denotes a battery mounting portion of the shield can 100.

A minute current flows through the rear case 200 made of a conductive material so that the rear case 200 is also operated as an antenna. Therefore, the rear case 200 is provided with an antenna (not shown) Also, if the main board is grounded or otherwise floated, the wireless performance is deteriorated. 1, in the case of the shield can 30 according to the related art, the shield can 30 and the rear case 20 are fastened to each other through the metallic boss (not shown) The case 20 is connected to the main board in a ground connection but such a ground connection is not sufficient and the connection between the shield can 30 and the rear case 20 There was a problem that the ground connection was not uniform.

However, in the case of the shield can 100 of the portable terminal according to the present invention, when the battery case 200 is fastened to the rear case 200 through the metallic boss, The rear case 200 and the shield can 100 are reinforced by the contact of the rear case 200 and the rear case 200 without the aid of a separate gasket or conductive tape through the plurality of rear case reinforcing embossing projections 130, The rear case 200 can be efficiently and uniformly connected to the main board even if manufacturing tolerances exist in the shield case 200 and the shield can 100.

The shield can 100 of the portable terminal according to the present invention includes a plurality of reinforcing ribs 130 formed on opposite sides of the surface on which the plurality of rear case contact reinforcing embossing projections 130 are provided so as to be in contact with the key PCB 300, And an embossing protrusion 140 for reinforcing the key PCB contact. Therefore, when the shield can 100 is fastened to the key PCB 300 through the fastening means (not shown), the key can be more efficiently and efficiently connected to the key PCB 300 through the plurality of embossing projections 140 So that the key PCB 300 can be more efficiently and uniformly grounded with the main board 300 by enhancing the electrical connection.

Here, the plurality of key PCB-reinforcing embossing protrusions 140 may be formed on the surface of the surface of the plurality of rear case-contacting reinforcing embossing protrusions 130 along the pattern of the plurality of rear case-contacting reinforcing embossing protrusions 130 And arranged on the opposite surface. The plurality of key board PCB contact reinforcing embossing protrusions 140 and the plurality of rear case contact enhancing embossing protrusions 130 are arranged on the same line so that the shield can 100 can be mounted on the rear case 200 and / By making the contact pressure applied when the key PCB 300 is fastened to the key PCB 300 coaxially, that is, along the pattern of the plurality of rear case contact reinforcing embossing protrusions 130, 140 and the shield case 100 through the plurality of rear case contact reinforcing embossing projections 130 and the rear case 200 and the key PCB 300 so that the electrical connection is made more efficient .

In the meantime, the shield can 100 according to the present invention having the above-described configuration can be made more easily and uniformly quality by manufacturing a metal plate by press working, and in such a case, The contact reinforcing embossing protrusion 140 and the plurality of rear case contact enhancing embossing protrusions 130 are formed to be staggered and arranged in a zigzag fashion.

The shield can 100 of the portable terminal according to the present invention may include a plurality of crimped embossing projections provided to be pressed by the battery 250 to a portion of the battery seating portion 120 in contact with the battery 250, (150). Since the battery mounting part 120 of the shield can 100 contacts with the battery 250, the plurality of the pressed crimped embossing protrusions 150 are pressed to receive the pressing force by the battery 250, The key PCB 300 can be more closely contacted with the embossing protrusion 140 for enhancing the contact of the plurality of key PCBs with the main PCB 300 so that the key PCB 300 can be more efficiently and evenly grounded (ground) connection.

As described above, the shield can 100 of the portable terminal according to the present invention includes the plurality of rear case-reinforcing embossing projections 130, the plurality of key PCB-reinforcing embossing projections 140, The electrical connection between the shield can 100 and the rear case 200 and the key PCB 300 is strengthened without the aid of a separate gasket or conductive tape, The rear case 200 and the key PCB 300 can be more efficiently and uniformly connected to the main board through the ground even if there is a slight manufacturing tolerance, The cost can be reduced and the manufacturing time can be shortened.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Of course. Therefore, the scope of the present invention should not be limited to the embodiments described, but should be determined by the scope of the appended claims, as well as the appended claims.

1 is a perspective view showing an example of a shield can according to the prior art,

2 is a perspective view of a shield can of a portable terminal according to the present invention,

FIGS. 3A and 3B are a partial plan view and a rear view of the shield can shown in FIG. 2, respectively;

FIG. 4 is a perspective view of the shield can, the rear case and the key PCB shown in FIG. 2,

FIG. 5 is a side view of the shield can shown in FIG. 4 in a state where it is combined with the rear case and the key PCB.

Description of Reference Numerals in Main Parts of the Drawings

110: separating wall 120: battery mounting part

130: Embossing projection for reinforcing rear case contact

140: Embossing projection for reinforcing key PCB contact

150: crimped embossing projection

200: rear case 210: battery accommodating portion

212: Battery housing part edge 250: Battery

300: Key PCB

Claims (5)

1. A shield can, which is interposed between a rear case of a portable terminal and a key PCB to shield electromagnetic interference or radio frequency interference, And a partition wall for partitioning a space in which each chip of the main board is housed, And a plurality of embossing projections on the both sides, And a plurality of rear case reinforcing embossing projections formed at predetermined intervals in a portion of the surface of the side where the separating wall is formed to contact with the edge of the battery receiving portion of the rear case in which the battery is received, And a plurality of key board PCB contact reinforcing embossing protrusions formed at regular intervals to be in contact with the key PCB in a corresponding area on the opposite side of the partial area where the plurality of rear case contact reinforcing embossing protrusions are provided. Shield cans. The method according to claim 1, Further comprising: a plurality of crimped embossing projections that are pressed by the battery in contact with the battery. 3. The method according to claim 1 or 2, Wherein the plurality of key board PCB contact reinforcing embossing projections are arranged on the opposite surface along a pattern of the plurality of rear case contact reinforcing embossing projections. The method of claim 3, Wherein the plurality of key board PCB contact reinforcing embossing projections and the plurality of rear case contact reinforcing embossing projections are arranged in a staggered arrangement. 5. The method of claim 4, Wherein the shield can is formed by pressing a metal plate.

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