KR20090023970A - Coupling device for shielding type shield can - Google Patents

Abstract

A coupling device of a shield can for shielding is provided to improve a contact property with a printed circuit board by forming an adhesive unit in a shielding wall of the shield can. A connecting apparatus of a shield can includes at least one holding device(110) and a shield unit(120). The holding device is protruded in a printed circuit board(10). The holding device guides the mounting position of the shield can. The shield can is detachably coupled to the holding unit. The shield unit is formed in the shield can. The shield unit is connected to the holding device. The shield unit blocks the electromagnetic wave of the devices of the printed circuit board. The holding device is composed of a pair of the leaf springs. The shield unit is detachably fixed between the pair of leaf springs. Each leaf spring has the clip shape.

Description

Fastening device for shielding shield cans {COUPLING DEVICE FOR SHIELDING TYPE SHIELD CAN}

The present invention relates to a fastening device for a shielded shield can, and more particularly, to a fastening device for a shielded shield can for fixing the shield can to a printed circuit board.

In general, a portable electronic device is a device for allowing a user such as a portable terminal, an MP3 player, a PMP, etc. to carry a variety of contents while carrying the portable electronic device. Its size is downsizing.

Various electronic devices and communication devices (particularly portable wireless terminals) are provided with various contents, and a printed circuit board for electrically connecting such contents is provided. When using such electronic devices or communication devices (particularly portable wireless terminals), harmful radio waves are generated in various devices mounted on a printed circuit board. Therefore, the electromagnetic waves generated by the various electronic devices are strictly regulated.

For example, there is an environmental compatibility test for testing whether the electromagnetic wave is regulated to the environment (electromagnetic compatibility; EMC).

The electromagnetic compatibility is classified into two categories.

This is because the electromagnetic interference (EMI) and electromagnetic susceptibility (EMS) and is harmful to the human body is being strictly regulated. Therefore, many devices for preventing the electromagnetic waves in advance due to strict regulation of the environmental compliance test have been proposed.

 For example, in order to shield electromagnetic waves generated from each element on a printed circuit board used in a portable terminal, a coating is applied by EMI spray or vacuum deposition, or a shielding shield can is mounted on the printed circuit board. There is a way.

1 is an exploded perspective view of a shield can mounted on a conventional printed circuit board, and FIG. 2 is a perspective view of a shield can mounted on a printed circuit board.

1 and 2, in order to mount the shield can 20 for electromagnetic wave shield to the printed circuit board 10, at least one boss is fastened to the printed circuit board 10 in the shield can 20. The hole 21 is provided, and the fastening hole 11 is formed in the printed circuit board 10 to be engaged with the boss hole 21.

After placing the shield can 20 on the printed circuit board 10 so that the boss hole 21 and the fastening hole 11 are engaged with each other, the fastening member 30 such as a screw is connected to the boss hole 21 and the fastening hole ( 11), the shield can 20 is fastened to the printed circuit board 10.

However, in order to mount the shield can 20 to the printed circuit board 10, the fastening member 30 must be fastened to the boss hole 21 and the fastening hole 11 in order to install the shield can 20. The process is complicated.

In addition, when the shield can 20 is mounted on the printed circuit board 10 and the mounting state or operation state of the elements formed on the printed circuit board 10 needs to be checked, the shield is mounted on the printed circuit board 10. Since all the fastening of the fastening member 30 for fastening the can 20 has to be released, the inspection process is complicated.

Accordingly, the present invention includes a holding device capable of holding a shield can on a printed circuit board, and inserts a fastening wall provided in the shield can into the holding device provided on the printed circuit board, thereby easily shielding the shield can to the printed circuit board. The present invention provides a fastening device for a shielded shield can that can be easily mounted.

In addition, the present invention provides a fastening device for a shielded shield can to form a close contact with the printed circuit board on the blocking wall of the shield can to improve contact with the printed circuit board.

In addition, by preventing the interference between the elements of the printed circuit board and the elements inside the shield can, and by blocking the electromagnetic waves, and provided with an auxiliary blocking portion formed with a strip finger to be in close contact with the printed circuit board, contact with the ground The present invention provides a fastening device for a shielded shield can that can be improved and stabilized.

To this end, the present invention, in the fastening device of the shield can for electromagnetic shield provided in the printed circuit board,

At least one holding device protruding from the printed circuit board, guiding a mounting position of the shield can, and detachably fastening the shield can; And

And a shielding part provided in the shield can and fastened to the holding device and blocking electromagnetic waves of the elements of the printed circuit board.

The holding device is characterized in that it consists of a pair of leaf spring that is fixed by inserting the shield and detachable.

The leaf springs are provided to face each other, and a holding space for seating and holding the shield is formed between the leaf springs.

When the shield is fastened to the leaf spring, the leaf springs are pushed in the opposite directions in opposite directions to each other, and the elastic force is applied to the shield to hold the shield to engage with the leaf spring so that the leaf springs are mounted in the holding space.

The leaf springs are characterized in that the clip shape.

The shielding portion is provided to protrude on the edge of the shield can, the fastening wall is inserted between the pair of the leaf spring to secure the shield can to the printed circuit board,

A blocking wall formed between the fastening wall and the adjacent fastening wall of the fastening wall to block electromagnetic waves;

 It is characterized in that it is formed to protrude to one side from the blocking wall to be in close contact with the one surface of the printed circuit board in close contact.

An auxiliary blocking unit is provided inside the shield can to block electromagnetic waves between the device and the device of the printed circuit board.

The auxiliary blocking unit is provided to protrude from the inside of the shield can, the auxiliary blocking wall for blocking the elements and elements of the printed circuit board by preventing the interference of electromagnetic waves generated in the elements of the printed circuit board,

A bent surface that is bent to one side at an end of the auxiliary blocking wall and is in contact with the printed circuit board;

Protrudingly formed on one surface of the bent surface, characterized in that consisting of a strip pinker in contact with the printed circuit board.

One surface of the shield can is characterized in that the heat dissipation port for dissipating heat generated by the element of the printed circuit board is provided.

The holding device protrudes from the printed circuit board and includes a pair of opposing holding parts;

It is characterized in that the end of the holding portion is formed to be inclined in a direction opposite to each other, the elastic plate for holding the fastening wall.

The elastic plate is characterized in that the clip shape.

As stated above, the shielding shield fastening device according to the present invention is provided with a holding device to hold the fastening wall of the shield can on the printed circuit board, thereby printing the shield can without using fastening members such as screws. It is possible to mount on a circuit board has the effect of simplifying the assembly process.

In addition, by forming a close contact portion on the blocking wall of the shield can, it is in close contact with one surface of the printed circuit board to improve the contact with the ground and to stabilize.

In addition, the shield can is provided with an auxiliary blocking portion inside the can, and by forming a strip finger on the bent surface formed in the auxiliary blocking portion has the effect of improving the contact with the ground by the strip finger and can be stabilized.

Hereinafter, with reference to the accompanying drawings will be described in detail the most preferred embodiment of the present invention.

3, 6, 7 and 8, the fastening device of the shield can for electromagnetic wave shield provided in the printed circuit board 10 is composed of a holding device 110 and the shielding portion 120. have.

As shown in FIGS. 3, 6, 7 and 8, the holding device 110 guides the mounting position of the shield can 20, and at least to detachably fasten the shield can 20. One or more protruding portions of the printed circuit board 10 and the shield 120 are fastened to the holding device 110 and shield the electromagnetic waves of the elements of the printed circuit board 10. 20 is provided.

As shown in FIGS. 3, 4, and 7, the holding device 110 includes a pair of leaf springs 111 to insert and fix the shield 120 and to be detachable therefrom.

As shown in FIGS. 3, 4 and 7, the leaf springs 111 are provided to face each other, and the shield spring 120 may be seated and held between the leaf springs 111. Holding space 115 is formed so that.

As shown in FIGS. 3, 4, 6 and 7, when the shield 120 is fastened to the leaf spring 111, the leaf springs 111 are pushed in opposite directions in opposite directions. In addition, by applying an elastic force to the shielding portion 120 is to hold the shielding portion 120 to be engaged between the holding space 115 of the leaf spring (111).

As shown in FIGS. 3, 4, 6, and 7, the leaf springs 111 have a clip shape.

3, 5, and 7, 8, the shield 120 includes a fastening wall 121, a blocking wall 122, and an adhesion part 123.

As shown in FIGS. 3, 5, and 8, the fastening wall 121 is inserted between the pair of leaf springs 111 so that the shield can 20 is inserted into the printed circuit board 10. It is provided to protrude at the edge of the shield can 20 to be fixed, the blocking wall 122 is formed between the fastening wall 121 and the adjacent fastening wall of the fastening wall 121 to block the electromagnetic waves. The close contact portion 123 extends to protrude to one side from the blocking wall 122 to be in close contact with one surface of the printed circuit board 10.

As shown in FIG. 5, an auxiliary blocking unit 130 is provided inside the shield can 20 to block electromagnetic waves between the device and the device of the printed circuit board 10.

As shown in FIG. 5, the auxiliary blocking part 130 includes an auxiliary blocking wall 131, a bent surface 132, and a strip finger 133.

As shown in FIG. 5, the auxiliary blocking wall 131 prevents the interference of electromagnetic waves generated in the elements of the printed circuit board 10 to block the elements and the elements of the printed circuit board 10. It is provided to protrude from the inside of the shield can 20, the bent surface 132 is bent in one direction at the end of the auxiliary blocking wall 131, the strip finger 133 is the bent surface 132 Protruding from one surface of the) has elasticity and is formed on the bent surface 132 to be in contact with the printed circuit board 10.

As shown in FIGS. 3, 5, and 6, one surface of the shield can 20 is provided with a heat dissipation hole 140 for dissipating heat generated by an element of the printed circuit board 10.

The operation of the fastening device 100 of the shielding shield can according to an embodiment of the present invention having the above configuration will be described in more detail with reference to FIGS. 3 to 8 as follows.

As shown in FIGS. 3 and 6, the shield can 20 is disposed on one surface of the printed circuit board 10 in which respective devices are provided to block electromagnetic waves generated from the devices of the printed circuit board 10. Mount it.

As shown in FIG. 3, a ground 40 is provided between the elements of the printed circuit board 10 in a position engaged with the shielding part 120 protruding from the edge of the shield can 20. In addition, a pair of the leaf springs 111 are provided on the ground 40 to face each other, and the leaf springs 111 are at least one or more on the ground 40 to mount the shielding part 120. Is formed.

Thus, as shown in FIGS. 6 and 7, the fastening wall 121 of the shield 120 is mounted to the holding space 115 between the leaf springs 111 facing each other.

As the leaf spring 111 is opposite to each other, as shown in FIG. 4, when the fastening wall 121 is inserted between the holding spaces 115, the leaf springs 111 are elastic in a direction facing each other. It will happen on both sides.

As the fastening wall 121 is inserted, the leaf spring 111 exerts an elastic force on the fastening wall 121, and the fastening wall 121 is held by the leaf spring 111.

In addition, while the fastening wall 121 is mounted and held in the holding space 115 between the leaf springs 111, the close contact portion 123 is connected to the printed circuit board 10, in particular the printed circuit board. It is in close contact with the ground 40 provided in (10).

In addition, the inside of the shield can 20 to block the electromagnetic wave between the device and the device of the printed circuit board 10 and to improve the contact with the printed circuit board 10 as well as the strip finger ( The auxiliary blocking unit 130 having the 133 is provided to protrude.

The auxiliary blocking unit 130 may include an auxiliary blocking wall 131 for blocking an element and an element of the printed circuit board 10 to prevent interference of electromagnetic waves generated in the elements of the printed circuit board 10; A bent surface 132 bent to one side at the distal end of the auxiliary barrier wall 131 and a strip fingerer 133 as one surface of the bent surface 132.

The strip finger 133 is formed to protrude at a predetermined inclination by bending the cut portion in one direction while cutting three sides on the bent surface 132.

In addition, the ground 40 is formed on one surface of the printed circuit board 10 at a position facing the strip finger 133.

The strip finger 133 is attached to the fastening wall 121 by the leaf spring 111 and is in close contact with the ground 40 of the printed circuit board 10. As a result, the contactability of the printed circuit board 10 with the ground 40 is improved and stabilized.

As described above, when the fastening wall 121 formed at the positions of the leaf springs 111 is engaged with the holding space 115 between the pair of leaf springs 111, the printed circuit board ( 10, the shield can 20 can be mounted.

In this state, when the shield can 20 is pulled in the opposite direction to the fastening direction, the fastening wall 121 held by the leaf springs 111 is separated from the leaf spring 111.

At the same time, the close contact 123 and the strip finger 133 formed on the bent surface 132 is also separated from one surface of the printed circuit board 10, the shield can 20 is the printed circuit board Separated at 10.

As described above, the shield can 20 is easily mounted on the printed circuit board 10 by including the holding device 110 capable of holding the shield can 20 on the printed circuit board 10. It can be attached easily.

In addition, when checking the elements of the printed circuit board 10 covered by the shield can 20, the shield can 20 can be easily separated, thereby improving user convenience.

In addition, Figure 9 illustrates another embodiment of the holding device in the fastening device of the shield shield can according to an embodiment of the present invention.

Accordingly, a holding part 211 protruding from the printed circuit board 10 to face each other and an elastic plate 212 formed to be inclined inward from the end of the holding part 211 are provided.

The elastic plates 212 are formed in a clip shape, and apply elastic force in a direction facing each other.

The holding space 115 is formed between the elastic plates 212, and the fastening wall 121 is inserted between the holding spaces 115.

When the fastening wall 121 is inserted between the holding spaces 115, the elastic plate 212 is elastically moved to open toward the holding part 211 and applies an elastic force to the fastening wall 121. The fastening wall 121 is held between the elastic plates 212.

In addition, while the fastening wall 121 is held between the elastic plates 212, the close contact portion 123 is in close contact with the printed circuit board 10.

At the same time, as shown in FIG. 5, the strip finger 133 formed on the bending surface 132 bent from the auxiliary barrier wall 131 is also in close contact with the printed circuit board 10 so as to contact the ground 40. It improves contact with) and stabilizes.

As described above, by providing at least one pair of the holding devices 210 to hold the shield can 20 on the printed circuit board 10, the shield on the printed circuit board 10 The can 20 can be easily mounted.

In addition, when checking the elements of the printed circuit board 10 covered by the shield can 20, the shield can 20 can be easily separated, thereby improving user convenience.

The fastening device of the shield shield can of the present invention described above is not limited to the above-described embodiments and drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical idea of the present invention. It will be apparent to those of ordinary skill in the art.

For example, the shape of the holding block is illustrated as being illustrated in a clip shape or a leaf spring shape, but any device capable of detachably holding the fastening wall is possible.

1 is an exploded perspective view illustrating the separation of a shield can and a printed circuit board according to the related art.

2 is a plan view showing an inner side of a shield can according to the prior art;

3 is an exploded perspective view of the shield can and the printed circuit board of the shield can fastening device for shielding according to an embodiment of the present invention.

4 is an enlarged perspective view of portion A of FIG.

Figure 5 is a plan view showing the inner surface of the shield can in the shield shield can fastening device according to an embodiment of the present invention.

FIG. 6 is a plan view illustrating a shield can mounted on a printed circuit board in a shield shield fastening device according to an embodiment of the present invention; FIG.

Figure 7 is a side cross-sectional view showing a cross-section between the holding space between the holding wall in the shield shield fastening device for shielding according to an embodiment of the present invention.

Figure 8 is a side cross-sectional view showing a cross-sectional view of the blocking wall is formed in close contact with the printed circuit board in the shield shield can fastening device according to an embodiment of the present invention.

Figure 9 is a side cross-sectional view showing another embodiment of the fastening wall in the shield can fastening device for shielding according to an embodiment of the present invention.

Claims (9)

In the fastening device of the shield can for shielding electromagnetic waves provided on a printed circuit board, At least one holding device protruding from the printed circuit board, guiding a mounting position of the shield can, and detachably fastening the shield can; And And a shielding portion provided in the shield can, the shielding portion being coupled to the holding device and blocking electromagnetic waves of the elements of the printed circuit board. The method of claim 1, The holding device is a fastening device of the shield shield can, characterized in that consisting of a pair of leaf springs to be fixed by the insertion and detachment of the shield. The method of claim 2, The leaf springs are provided to face each other, and a holding space for seating and holding the shield is formed between the leaf springs. When the shielding part is fastened to the leaf spring, the leaf springs are pushed in opposite directions in opposite directions to each other and an elastic force is applied to the shielding portion so that the shielding portion is engaged between the holding spaces of the leaf springs. Fastening device of the shield can. The method of claim 3, wherein Fastening device of the shield shield can, characterized in that the leaf spring is made in the shape of a clip. The method of claim 1, The shielding portion is provided to protrude on the edge of the shield can, the fastening wall is inserted between the holding device of the pair to secure the shield can to the printed circuit board, A blocking wall formed between the fastening wall and the adjacent fastening wall of the fastening wall to block electromagnetic waves;  Shield can fastening device for shielding characterized in that it is formed to protrude to one side from the blocking wall to be in close contact with one surface of the printed circuit board in close contact. The method of claim 1, An auxiliary blocking unit is provided inside the shield can to block electromagnetic waves between the device and the device of the printed circuit board. The auxiliary blocking unit is provided to protrude from the inside of the shield can, the auxiliary blocking wall for blocking the elements and elements of the printed circuit board by preventing the interference of electromagnetic waves generated in the elements of the printed circuit board; A bent surface that is bent to one side at an end of the auxiliary blocking wall and is in contact with the printed circuit board; Shield can fastening device for shielding characterized in that it is formed protruding on one surface of the bent surface, consisting of a strip pinker in contact with the printed circuit board. The method of claim 1, Shield can fastening device for shielding, characterized in that the one surface of the shield can is provided with a heat dissipation port for dissipating heat generated from the elements of the printed circuit board. The method of claim 5, wherein The holding device protrudes from the printed circuit board and includes a pair of opposing holding parts; Fastening device for shielding shield can, characterized in that formed in the end of the holding inclined in the direction opposite to each other, the elastic plate for holding the fastening wall. The method of claim 8, Shield plate fastening device for shielding, characterized in that the elastic plate is made of a clip shape.

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