KR101939649B1 - Electric shock protection contactor assembly and mobile electronic apparatus with the same - Google Patents

Abstract

There is provided an electric shock protection contactor combination and a portable electronic device having the same. According to an embodiment of the present invention, an electric shock protection contactor combined body includes a conductive case having a side portion; A circuit board having a shield can for shielding electromagnetic waves on an upper surface thereof and having a junction electrically connected to the shield can on a side surface; And a shield case which is connected to the junction through the solder and connects the shield case and the ground portion of the circuit board through the circuit board and the side portion of the conductive case, And an electric shock protection contactor for blocking the electric field from being transmitted to the conductive case. According to this, it is possible to prevent damage to the user such as electric shock through the conductor or breakage of the internal circuit, shield the electromagnetic wave, and require no additional device for implementing the function and the additional space of the device, It is not necessary to provide a mounting space on the circuit board, and the degree of freedom in designing the circuit board can be improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric shock protection contactor assembly and a portable electronic device having the contactor assembly,

The present invention relates to a contactor assembly for protecting an electric shock and a portable electronic device having the same, and more particularly, to a contactor assembly for protecting a user from a leakage current by a power source and shielding an electromagnetic wave, And a portable electronic device having the same.

[0003] In recent portable electronic devices, various component elements are densely arranged in the interior in accordance with miniaturization and multifunctionalization. In addition, portable electronic devices have recently been increasing in adoption of housings made of metal to improve esthetics and robustness.

In such a portable electronic device, harmful electromagnetic waves radiated from the internal electronic components are generated, and electromagnetic waves from other electronic devices can be introduced through an external housing such as a metal case. Such electromagnetic waves may interfere with each other and may be detrimental to the human body, and thus EMI (Electromagnetic Interference) standards must be met to shield them. In order to achieve this, a shield can for electromagnetic wave shielding is essentially used.

Such a shield can is installed on a circuit board to block electromagnetic waves generated from electronic components of a portable electronic device. Here, in order to electrically connect the shield can with the external case, a foam gasket is used on the contact surface between the shield can and the external case. These foam gaskets are thin and rough.

As a result, an electrical path can be formed between the housing and the internal circuit board by the conductive gasket or the conductive contactor. In particular, as the metal housing and the circuit board form a loop, The static electricity may flow into the internal circuit board through the conductive gasket or the conductive contactor, and the circuit such as the IC may be damaged.

On the other hand, such a portable electronic device typically uses a charger to charge the battery. Such a charger rectifies an external AC power source to a DC power source and then through a transformer to a low DC power source suitable for a portable electronic device. Here, in order to enhance the electrical insulation of the transformer, a Y-CAP composed of a capacitor is provided at both ends of the transformer.

However, when the Y-CAP does not have the normal characteristics, such as a non-genuine charger, the DC power may not be sufficiently blocked by the Y-CAP, and furthermore, a leakage current may be generated by the AC power source. Can propagate along the ground of the circuit.

Such a leakage current can be transmitted to a conductor that can be contacted with a human body as in an external case of a portable electronic device. As a result, the user can be displeased with a feeling of crushing and, in severe cases, There is a problem of causing an electric shock accident.

Therefore, it is necessary that a protective element for protecting the user from such luminescence current is provided in the conductive gasket or the conductive contactor connecting the metal housing and the circuit board.

Thus, there is a need for a contactor having various functions for protecting a user or a circuit in a portable electronic device as well as a simple electrical contact according to the use of a conductor such as a metal case.

However, in order to implement these various functions, additional component elements are required, and thus, an additional space is required on the circuit board of the portable electronic device, which adversely affects miniaturization.

Therefore, it is inevitable to develop a contactor assembly which satisfies the shielding of leakage current flowing from an external power source and the shielding of electromagnetic waves but does not require a separate mounting space.

KR 2007-0109332 A (November 15, 2007 open)

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide an electric shock protection contact capable of shielding a user or an internal circuit from a leakage current by an external power source, And a portable electronic device having the same.

In order to solve the above-described problems, the present invention provides a semiconductor device comprising: a conductive case having a side portion; A circuit board having a shield can for shielding electromagnetic waves on an upper surface thereof and having a junction electrically connected to the shield can on a side surface; And a shield case which is connected to the junction through the solder and connects the shield case and the ground portion of the circuit board through the circuit board and the side portion of the conductive case, And an electric shock protection contactor for preventing electric shock from being transmitted to the conductive case.

According to a preferred embodiment of the present invention, the bonding portion may be provided in a castellation form.

Further, the contact protection contact contact assembly may further include a conductive bracket coupled to the conductive case by fastening means and having an insertion groove into which the fastening means is inserted and fixed, wherein the circuit board has a through- Holes.

Also, the electric shock protection contactor may allow the static electricity to pass therethrough without being destroyed by insulation when the static electricity flows from the conductive case.

The contactor for protection against electric shock includes a conductive connection part electrically contacting the conductive case; And an electric shock protection device that is connected in series to the conductive connection portion and blocks a leakage current of the external electric power source.

Also, the electric shock protection housing may have a groove portion on the upper side, and the conductive connection portion may be at least partially inserted into the groove portion.

In addition, the electric shock protection device may have an external electrode on the bottom surface of the groove portion, and the conductive connection portion may be laminated on the external electrode through a conductive adhesive layer.

Further, the electric shock protection device may have a breakdown voltage (Vbr) satisfying the following formula:

Vbr> Vin

Where Vin is the rated voltage of the external power supply.

The conductive connection portion may be a conductive gasket, a silicone rubber pad, or a clip-shaped conductor having elasticity.

In addition, the conductive gasket may include at least one of a polymer body, a natural rubber, a sponge, a synthetic rubber, a heat-resistant silicone rubber, and a tube made of a conductive paste by thermocompression bonding.

The silicone rubber pad may further include: a body made of a silicone rubber; And a conductive wire vertically formed in the body.

The silicone rubber pad may further include: a body made of a silicone rubber; A plurality of conductive layers horizontally cross-deposited within the body; And a plurality of contact portions formed in a curved shape on the upper side of the body.

Further, the silicone rubber pad may include a body made of a non-conductive silicone rubber; A conductive part filled with a conductive silicone rubber and conductive particles in a plurality of through holes formed vertically through the inside of the body; And a plurality of contact portions formed on both sides of the conductive portion in a curved shape.

Further, the clip-shaped conductor includes a contact portion having a curved shape and contacting the contacted conductor; A bending portion extending from the contact portion and having an elastic force; And a terminal portion electrically connected to the electric shock protection element.

The electric shock protection housing may include: a body having a plurality of sheet layers stacked; And at least a pair of internal electrodes spaced apart from each other by a predetermined distance.

The electric shock protection device may further include a gap formed between the pair of inner electrodes.

The gap may include a layer of a discharge material applied to the inner wall at a predetermined thickness along the height direction.

Further, the pair of internal electrodes may be arranged on the same plane.

The electric shock protection device may further include at least two varistor material layers alternately stacked with a first varistor material layer and a second varistor material layer; A plurality of first internal electrodes spaced apart by a predetermined distance L on the first varistor material layer; And a plurality of second internal electrodes spaced apart from each other by a predetermined distance L on the second varistor material layer.

The breakdown voltage Vbr may be the sum of breakdown voltages formed between the first and second inner electrodes adjacent to each other.

The first internal electrode and the second internal electrode may be arranged so that at least a part of the first internal electrode and the second internal electrode do not overlap or overlap each other.

The spacing L of the first internal electrodes or the spacing L of the second internal electrodes may be greater than the shortest distance d between the first internal electrodes and the second internal electrodes.

On the other hand, the present invention can provide a portable electronic device having the above-described contactor combined body for protection against electric shock.

The contactor protection contactor combined body and the portable electronic device having the contactor protection contactor according to an embodiment of the present invention may be used in a portable electronic device in which a conductive case such as a metal case is exposed to the outside and a shield can is provided, It is possible to prevent damage to the user such as electric shock through the conductive case or breakage of the internal circuit and to shield the electromagnetic wave and to provide a separate element for implementing the function, There is no need for an additional space, which is suitable for miniaturization of a portable electronic device.

In addition, according to the present invention, it is not necessary to provide a mounting space on a circuit board by connecting the external case and the circuit board by attaching the contactor assembly for protection against electric shock using the side surface of the circuit board, have.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a contactor protection contact assembly according to an embodiment of the present invention,
Fig. 2 is a cross-sectional view of the conductive case and the conductive bracket separated from each other in Fig. 1,
Figs. 3 and 4 are cross-sectional views of an example of an electric shock protection contactor in the electric shock protection contactor assembly of Fig.
FIGS. 5 to 8 are cross-sectional views showing various forms of the electric shock protection element of the contactor for protection against electric shock in the contactor for protection against electric shock shown in FIG. 3 and FIG. 4,
9 to 12 are sectional views of another example of an electric shock protection contactor in the electric shock protection contactor assembly of FIG.
13 and 14 are cross-sectional views of still another example of an electric shock protection contactor in the electric shock protection contactor assembly of FIG. 1,
15 to 17 are sectional views showing various forms of the conductive connection portion of the contactor for protecting the electric shock in the contactor contact assembly of FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

1, the electric shock protection contactor combined body 10 according to an embodiment of the present invention includes a conductive case 11, a circuit board 12, a shield can 15, and an electric shock protection contactor 100 ).

Such an electric shock protection contactor assembly 10 is for connecting an external metal case to a circuit board in a portable electronic device.

Here, the portable electronic device may be in the form of a portable electronic device that is portable and portable. For example, the portable electronic device may be a portable terminal such as a smart phone, a cellular phone, and the like, and may be a smart watch, a digital camera, a DMB, an electronic book, a netbook, a tablet PC, Such electronic devices may comprise any suitable electronic components including antenna structures for communication with external devices. In addition, it may be a device using local area network communication such as Wi-Fi and Bluetooth.

The conductive case 11 may be provided, for example, to partially surround or partially surround the side portion of the portable electronic device, and may be connected to the shield can 15 and the grounding portion of the circuit board 12. For example, the conductive case 11 has a downwardly bent side face 11-1, and the side face 11-1 is connected to the circuit board 12 through the electric contact protector 100 for protection do.

The circuit board 12 has a bonding portion 12a on the side surface of the conductive case 11. The connection portion 12a may be connected to the shield can 15 through the connection wiring 12c and may be connected to the ground portion by the internal wiring 12d of the circuit board 12. [ Here, the internal wiring 12d may be a ground line.

The contact portion 12a is for coupling the contact protection contact 100, and the contact protection contact 100 can be coupled through the solder 12b. At this time, the bonding portion 12a may be provided in the form of a caster. Accordingly, the connection portion 12a can be easily combined with the internal wiring 12d of the circuit board 12 and the contactor 100 for protection against electric shock.

The shield can 15 is disposed on the circuit board 12, and may be disposed to cover electronic components mounted on the circuit board 12. The shield can 15 is connected to the ground portion of the circuit board 12 to bypass electromagnetic waves generated from the electronic component introduced from the conductive case 11 or mounted on the circuit board 12 to the ground , Thus shielding electromagnetic waves.

The contactor 100 for electric shock protection is mounted on the joint portion 12a and electrically connects the side portion 11-1 of the conductive case 11 to the circuit board 12. [ At this time, when the leakage current of the external power source flows from the circuit board 12, it is cut off by the electric shock protection contactor 100.

That is, the contactor 100 for electric shock protection electrically connects the conductive case 11 to the shield can 15 and the grounding portion of the circuit board 12 via the circuit board 12 with respect to electromagnetic waves or the like , The leakage current of the external power source from the circuit board (12) is prevented from being transmitted to the conductive case (11).

Thus, by connecting the shield can 15 and the conductive case 11 to the ground of the circuit board 12 through the shielding contactor 100 at the side of the circuit board 12, It is not necessary to provide a space for mounting the contact protection contactor 100 on the circuit board 12 so that the degree of freedom in designing the circuit board can be improved.

Such an electric shock protection contactor 100 includes a conductive connection portion 110 and an electric shock protection element 120. 1, the contactor 100 for electric shock protection is pressed by a pressing force when the conductive case 11 is coupled to the conductive bracket 13, and as shown in FIG. 2, When the case 11 is detached from the conductive bracket 13, it can have an elastic force that can be restored to its original state.

The conductive connection part 110 may electrically contact the conductive case 11 and may have an elastic force. The conductive connection 110 may be a conductive gasket, a silicone rubber pad, and a clip-shaped conductor having an elastic force.

Here, when the conductive connection part 110 is in surface contact with the conductive case 11 like a conductive gasket or a silicone rubber pad, the conductive connection part 110 may be integrally formed of a conductive material having an elastic force. At this time, the conductive connection part 110 can be contracted toward the circuit board 12 by the pressing force of the conductive case 11, and when the conductive case 11 is separated from the conductive bracket 13, Lt; / RTI > can be restored to its original state.

9, when the conductive connection part is in contact with the conductive case 11 like a clip-shaped conductor having an elastic force, the conductive connection part 110 is formed so that the contact part 211 contacts the conductive case 11 When the conductive case 11 is separated from the conductive bracket 13, the elasticity of the bent portion 212 is reduced to a certain level when the conductive case 11 is pushed toward the circuit board 12, Lt; / RTI > can be restored to its original state.

The electric shock protection device 120 may be electrically connected in series to the conductive connection part 110 and may be disposed in a stacked manner with the conductive connection part 110, for example. At this time, the external electrode may be disposed on one side of the electric shock protection housing.

Meanwhile, the electric shock protection device 120 includes a groove on one side coupled with the conductive connection part 110, an external electrode is provided on the bottom surface of the groove part, and the conductive connection part 110 is electrically connected to the conductive connection part 110, And may be laminated on the external electrode.

At this time, the electric shock protection element 120 may be a suppressor or a varistor.

Such an electric shock protection device 120 may have a breakdown voltage Vbr that satisfies the following equation so as to block the leakage current of the external electric power source:

Vbr> Vin

Where Vin is the rated voltage of the external power supply of the electronic device.

At this time, the rated voltage may be a standard rated voltage for each country, for example, 240V, 110V, 220V, 120V and 100V.

Since the conductive connection part 110 and the electric shock protection device 120 are integrated and soldered onto the joint part 12a on the side surface of the circuit board 12, It is not necessary to provide a separate mounting space on the circuit board 12 due to the arrangement of the electric shock protection element 120 and the electric shock protection element 120, so that the space can be efficiently utilized and therefore, it can be suitable for miniaturization.

The contactor protecting body 10 for electric shock protection according to the embodiment of the present invention may further include a conductive bracket 13. [

The circuit board 12 is coupled to one side of the conductive bracket 13 and the LED module 14 is coupled to the other side. Here, the connection between the conductive bracket 13, the circuit board 12, the conductive bracket 13, and the LED module 14 is not particularly limited, and is generally made by joining or bonding. do.

At this time, the conductive case 11 may be provided with the coupling groove 11a for coupling with the conductive bracket 13. The fastening groove 11a may have a shape in which the fastening means 11b can be inserted.

The conductive bracket 13 may be provided with an insertion groove 13a at a position corresponding to the fastening groove 11a of the conductive case 11. The fastening means 11b can be inserted and fixed in the insertion groove 13a.

1 and 2, the conductive case 11 can be coupled with the conductive bracket 13 by inserting the fastening means 11b into the fastening groove 11a, . That is, the fastening means 11b is inserted into the fastening groove 11a of the conductive case 11, and the fastening groove 11b of the conductive bracket 13 is inserted through the through hole 12e of the circuit board 12, And can be coupled to the insertion groove 13a.

Here, the conductive bracket 13 may be made of a conductive material, for example, magnesium (Mg).

3 and 4, the contactor 100 for protecting an electric shock protection contactor according to an embodiment of the present invention will be described in more detail.

As shown in FIGS. 3 and 4, the contactor 100, 100 'may include a conductive gasket 110 and an electric shock protection element 120 as a conductive connection.

The conductive gasket 110 may be integrally formed of a conductive material having an elastic force. For example, the conductive gasket 110 may include at least one of a polymer body, a natural rubber, a sponge, a synthetic rubber, a heat-resistant silicone rubber, and a tube made of a conductive paste by thermocompression bonding. The conductive gasket is not limited thereto and may include a conductive material having an elastic force.

One side of the conductive gasket 110 may be in surface contact with the conductive case 11 such as a metal housing and the other side thereof may be electrically connected to the electric shock protection device 120 as shown in FIG.

The external electrodes 121 and the connection electrodes 122 may be formed on the lower surface and the upper surface of the electric shock protection device 120, respectively. 3, the conductive adhesive layer 111 may be applied to the connection electrode 122 on the upper surface of the electric shock protection device 120, and the conductive gasket 110 may be laminated through the conductive adhesive layer 111. In this case, .

In addition, as shown in FIG. 4, the electric shock protection element 120 may have a groove 1202 on the upper surface thereof. Here, the shielding protection element 120 may include a connection electrode 122 on the bottom surface of the groove 1202. At this time, at least a part of the conductive gasket 110 may be inserted and laminated in the groove 1202 through the conductive adhesive layer 111.

The external electrode 121 and the connection electrode 122 are formed on the upper and lower surfaces of the protection member 120. However, the external electrode 121 and the connection electrode 122 are not limited to the electric shock protection And may be provided on the side surface of the device 120.

At this time, the electric shock protection element 120 may include various types of a suppressor or a varistor.

5, when the electric shock protection element 120 is a surpressor, the electric shock protection element 120 includes a body 120a, internal electrodes 125a and 125b, and a gap formation member 127. [

The elementary body 120a is integrally formed by a plurality of sheet layers sequentially stacked, electrodes arranged on one surface of each are arranged to face each other, and then subjected to a pressing and firing process.

Such a body 120a may be made of an insulating material having a dielectric constant, for example, a ceramic material, in which a plurality of sheet layers are stacked. At this time, the ceramic material of the metal-based and oxidative compounds, metal-based oxide compounds _{Er 2 O 3, Dy 2 O} 3, Ho 2 O 3, V 2 O 5, CoO, MoO 3, SnO 2, BaTiO 3, Nd 2 O 3 And may include at least one selected.

The lower surface of the elementary body 120a is provided with an external electrode 121 for mounting the conductive case 11 through the conductive tape 11b and the upper surface of the elementary body 120a is connected to a connection electrode 122 may be provided. Intermediate electrodes 123a and 123b connected to the external electrode 121 and the connection electrode 122 may be provided on both sides of the body 120a. That is, the intermediate electrode 123a may be connected to the external electrode 121, and the intermediate electrode 123b may be connected to the connection electrode 122. Alternatively, the external electrode 121 and the connection electrode 122 may be provided on a side surface of the body 120a.

The internal electrodes 125a and 125b are spaced apart from each other within the body 120a and may be formed of at least one pair. Here, the first internal electrode 125a may be connected to the intermediate electrode 123a, and the second internal electrode 125b may be connected to the intermediate electrode 123b.

The internal electrodes 125a and 125b and the intermediate electrodes 123a and 123b may include any one or more of Ag, Au, Pt, Pd, Ni, and Cu. The external electrodes 121 and the connection electrodes 122, May contain at least one of Ag, Ni, and Sn components.

The first internal electrode 125a and the second internal electrode 125b may have the same pattern or may have different patterns. The first internal electrode 125a and the second internal electrode 125b may have different patterns. . That is, the internal electrodes 125a and 125b are not limited to a specific pattern if they are arranged so that the first internal electrode 215a and the second internal electrode 215b partially overlap each other in the configuration of the body.

The interval between the internal electrodes 125a and 125b may be an interval to satisfy the breakdown voltage Vbr of the electric shock protection element 120 and may be, for example, 10 to 100 占 퐉.

The gap forming member 127 may be disposed between the inner electrodes 125a and 125b and may include a layer of the discharge material 127a, 127b, and 127c applied to the inner wall at a predetermined thickness along the height direction. Here, the discharge material constituting the discharge material layers 127a, 127b, and 127c has a low dielectric constant, no conductivity, and no short circuit when an overvoltage is applied.

To this end, the discharge material may be made of a nonconductive material including at least one kind of metal particles, and may be made of a semiconductor material containing SiC or a silicon-based component.

For example, when the first internal electrode 125a and the second internal electrode 125b include an Ag component, the discharge material may include a SiC-ZnO-based component. The SiC (Silicon Carbide) component has excellent thermal stability, excellent stability in an oxidizing atmosphere, constant conductivity and heat conductivity, and low dielectric constant.

The ZnO component has excellent nonlinear resistance and discharge characteristics.

Both SiC and ZnO have conductivity when used separately, but when they are mixed and fired, ZnO is bonded to the surface of SiC particles to form an insulating layer having low conductivity.

In such an insulating layer, SiC completely reacts to form a SiC-ZnO reaction layer on the surface of the SiC particles. Accordingly, the insulation layer blocks the Ag path to provide a further higher insulation property to the discharge material and improves resistance to static electricity, thereby solving the DC short phenomenon when the supporter 120 is mounted on the electronic part.

Herein, the discharge material includes SiC-ZnO-based material as an example of the discharge material, but the present invention is not limited thereto. The discharge material may include a component constituting the first internal electrode 125a and the second internal electrode 125b A non-conductive material including a semiconductor material or metal particles may be used

At this time, the discharge material layers 217a, 217b, and 217c applied to the inner wall of the gap forming member 217 include a first portion 217a coated along the inner wall of the gap forming member 217, A second portion 217b arranged to be in contact with the first internal electrode 125a from the upper end of the first portion 217a and a second portion 217b extending in contact with the second internal electrode 125b from the lower end of the first portion 217a And a third portion 217c.

Accordingly, the discharge material layers 217a, 217b and 217c are formed not only on the inner wall of the gap forming member 217 but also on the upper and lower ends of the gap forming member 217, And the first internal electrode 125a and the second internal electrode 125b are extended to extend the contact area with the first internal electrode 125a and the second internal electrode 125b.

This is because some of the components of the discharge material layers 217a, 217b and 217c are vaporized by the electrostatic spark due to the overvoltage, thereby enhancing the resistance to static electricity even if a part of the discharge material layers 217a, 217b and 217c is damaged. So that the discharge material layers 217a, 217b, and 217c can perform their functions.

The gap 127d can be formed between the pair of inner electrodes 125a and 125b by the gap forming member 127. [ The static electricity introduced from the outside by the gap 127d can be discharged between the internal electrodes 125a and 125b. At this time, the electrical resistance between the internal electrodes 125a and 125b is lowered, and the voltage difference between both ends of the protection connector 100 can be reduced to a certain value or less. Therefore, the electric shock protection element 120 can pass static electricity without causing internal insulation breakdown.

On the other hand, the plurality of void forming members 217 may be provided. As described above, when the number of the gap forming members 217 is increased, the discharge path of the static electricity is increased, so that resistance to static electricity can be increased.

As shown in FIG. 6, the space 128 may be formed between the internal electrodes 125a and 125b without using the separate space forming member for the electric shock protection element 120 '. At this time, the sidewall of the gap 128 may include a discharge material layer 129.

7, the electric shock protection element 120 "may include a horizontal electrode formed on the same plane. That is, the electric shock protection element 120" may include a pair of horizontally arranged And internal electrodes 125a 'and 126b' of the electrode assembly.

At this time, a gap 128 'may be formed between the pair of inner electrodes 125a' and 125b '. Here, the gap 128 'may be formed to have a height greater than the height of the pair of inner electrodes 125a' and 125b ', and may be formed to be wider than the gap between the pair of inner electrodes 125a' and 125b ' . As the volume of the gap 128 'is expanded, even if fine particles are generated from the internal electrodes 125a' and 125b 'during the discharge by the static electricity, the space between the internal electrodes 125a' and 125b ' It is possible to reduce the incidence of defects that can be caused by the defects.

As shown in FIG. 8, when the electric shock protection element 220 is a varistor, the electric shock protection element 220 includes varistor material layers 220b and 220c and internal electrodes 225a and 225b.

The lower surface of the electric shock protection device 220 is provided with an external electrode 221 for mounting on the conductive case 11 and a connection electrode 222 for connection with a conductive gasket or a clip- .

At this time, intermediate electrodes 223a and 223b connected to the external electrode 221 and the connection electrode 222 may be provided on both sides of the electric shock protection device 220, respectively. That is, the intermediate electrode 223a may be connected to the external electrode 221, and the intermediate electrode 223b may be connected to the connection electrode 222. [ Alternatively, the external electrode 121 and the connection electrode 122 may be provided on a side surface of the body 120a.

The varistor material layer may be composed of at least two layers alternately of a first varistor material layer 220b and a second varistor material layer 220c. Here, the first varistor material layer 220b and the second varistor material layer 220c may be any one of a semiconductive material containing at least one of ZnO, SrTiO3, BaTiO3, and SiC, or a Pr and Bi-based material have.

The internal electrodes 225a and 225b are formed on the first varistor material layer 221 and the plurality of first internal electrodes 225a and the second varistor material layer 222 spaced apart from each other by a predetermined distance L, And a plurality of second internal electrodes 225b spaced apart from each other.

Here, the breakdown voltage Vbr of the varistor 220 may be the sum of breakdown voltages formed between the first internal electrode 225a and the second internal electrode 225b, which are closest to each other.

Each of the first internal electrode 225a and the second internal electrode 225b may be disposed so that at least a part of the first internal electrode 225a and the second internal electrode 225b do not overlap. That is, each of the first internal electrode 225a and the second internal electrode 225b may be disposed in an intersecting manner so that at least a part of the first internal electrode 225a and the second internal electrode 225b are overlapped with each other or may not be overlapped with each other.

The first internal electrode or the second internal electrode may have a gap so that static electricity or leakage current does not leak to the adjacent positions of the internal electrodes 225a and 225b but can proceed normally between the internal electrodes 225a and 225b .

For example, the distance L between the first internal electrode 225a and the adjacent first internal electrode 225a or the distance between the second internal electrode 225b and the second internal electrode 225b, The distance L between the first internal electrode 225a and the second internal electrode 225b is preferably greater than the shortest distance d between the first internal electrode 225a and the second internal electrode 225b.

As shown in FIGS. 9 to 12, the contactors 200 and 200 'for protecting the electric power are formed by a conductive connector 210 having a clip shape, and the clip-shaped conductor 210 includes a contact portion 211, 212 and a terminal portion 213.

The contact portion 211 has a curved shape and is in electrical contact with the conductive case 11 as shown in FIG. The bent portion 212 extends from the contact portion 211 and may have an elastic force. The terminal portion 213 may include a terminal electrically connected to the electric shock protection portion.

The contact portion 211, the bent portion 212, and the terminal portion 213 may be integrally formed of a conductive material having an elastic force.

The external electrodes 121 and the connection electrodes 122 may be formed on the lower surface and the upper surface of the electric shock protection device 120, respectively. 9, a conductive adhesive layer 111 may be applied to the connection electrode 122 on the upper surface of the electric shock protection device 120, and a clip-shaped conductor 210 may be formed through the conductive adhesive layer 111. In this case, May be installed on the upper surface of the electric shock protection device 120 so as to be energized.

According to another embodiment, as shown in FIGS. 10 to 12, the electric shock protection element 120 may be provided with a groove 1202 on its upper surface. Here, the shielding protection element 120 may include a connection electrode 122 on the bottom surface of the groove 1202. At this time, at least a part of the clip-shaped conductor 210 can be inserted into the groove 1202 and fixed to the conductive adhesive layer 111.

The external electrode 121 and the connection electrode 122 are formed on the upper and lower surfaces of the protection member 120. However, the external electrode 121 and the connection electrode 122 are not limited to the electric shock protection And may be provided on the side surface of the device 120.

With this structure, the groove portion 1202 can serve as a side stopper, and the clip-shaped conductor 210 does not need to have a separate side stopper, thereby reducing the manufacturing cost. In addition, at least a part of the clip-shaped conductor 210 is inserted into the groove 1202, so that warping and bending after coupling can be prevented.

Here, the contactor 200 for protecting the electric shock protection has been shown and described as being provided with the electric shock protection element 120 under the clip-shaped electric conductor 210, but the present invention is not limited thereto, And the device 120 may be electrically connected in series.

13 and 14, the contactor 300, 300 'for protecting the electric shock is formed by the silicone rubber pad 310 having a conductive connection portion 311 and a conductive wire 312, .

The body 311 may be made of silicone rubber and one side thereof may be in surface contact with the conductive case 11 and the other side thereof may be electrically connected to the electric shock protection device 120.

The conductive wire 312 may be formed vertically inside the body 311. This conductive wire 312 is intended to improve the electrical contact with the conductive case 11 and to supplement the elastic force of the body 311.

For example, when the conductive wire 312 is pressed by the conductive case 11, when the upper end thereof is bent downward and the conductive case 11 is removed, the conductive wire 312 is restored to its original vertical state, The elastic force of the elastic member 311 can be compensated.

15, the contact protector for electric shock protection is a case where the conductive connection portion is another type of silicone rubber pad 510. The silicone rubber pad 510 includes a body 511 and a conductive wire 512 .

The body 511 may be made of silicone rubber and one side thereof may be in surface contact with the conductive case 11 and the other side thereof may be electrically connected to the electric shock protection device 120.

The conductive wire 512 may be formed obliquely inside the body 511. The conductive wire 512 is for enhancing electrical contact with the conductive case 11 and supplementing the elastic force of the body 511.

For example, when the conductive wire 512 is pressed by the conductive case 11, when the upper end thereof is tilted to the left and right and the conductive case 11 is removed, the conductive wire 512 is restored to its original vertical state, The elastic force of the elastic member 511 can be compensated. At this time, if the conductive wire 512 is tilted by the pressing force of the conductive case 11, the contact with the conductive case 11 becomes excellent, and consequently, the conductivity of the electromagnetic wave can be improved.

Therefore, the conductive wire 512 is excellent in the conductivity of the electromagnetic wave, the elastic restoring force is good, and the long-term use thereof is less than that of the vertically formed conductive wire 312 of FIG. 13 bent downward by the pressing force of the conductive case 11 It can be possible.

16, the contact protector for electric shock protection includes a body 611, a conductive layer 612, and a contact portion 613 in the case where the conductive connection portion is a silicone rubber pad 610, .

The body 611 may be made of silicone rubber, and the lower portion thereof may be electrically connected to the electric shock protection device 120.

The conductive layer 612 may be horizontally cross-deposited within the body 611 and may be a plurality of layers of a curable Ag paste. The conductive layer 612 serves to improve the electrical contact with the conductive case 11 and to supplement the elastic force of the body 611.

For example, when the conductive layer 612 is pressed by the conductive case 11, the conductive layer 612 is pressed downward in the vicinity of the central portion thereof, and when the conductive case 11 is removed, the conductive layer 612 is restored to its original horizontal state, The elastic force of the body 611 can be compensated. This conductive layer 612 is more elastic than the vertically formed conductive wire 312 of FIG. 13 bent downward by the pressing force of the conductive case 11 or the obliquely formed conductive wire 512 of FIG. It has excellent restoring force and can be used for a long time.

The contact portion 613 may be formed in a curved shape on the upper side of the body 612. The contact portion 613 can increase the contact area with the conductive case 11 by a plurality of lines or surfaces contacting the conductive case 11. Therefore, the silicone rubber pad 610 can improve the conductivity of electromagnetic waves.

17, the contact protector for electric shock protection includes a body 712, a conductive portion 714, and a conductive portion 710. The conductive pad 710 may be formed of a conductive material, And a contact portion 716.

The body 712 may be made of a non-conductive silicone rubber, and may have through holes 713 vertically penetrating a plurality of locations thereof. At this time, the body 712 contacts the conductive case 11 through the contact portion 716 formed at one side thereof, and is electrically connected to the electric shock protection device 120 through the contact portion 716 formed at the other side .

The conductive portion 714 may be made of conductive silicone rubber and conductive particles. The conductive portion 714 may be formed by filling a plurality of through holes 713 with a conductive silicone rubber and conductive particles. Here, the conductive silicone rubber has a function of fixing the positions of the conductive particles in the through holes 713, and the conductive particles may be regularly or irregularly dispersed in the conductive silicone rubber.

At this time, when the pressure or heat is not externally applied to the conductive particles, the conductive particles are not separated from each other and are not energized. When pressure or heat is externally applied, the conductive particles may contact each other due to shrinkage of the conductive silicone rubber, .

Such a conductive portion 714 can realize electrical contact with the conductive case 11 by conductive particles, and shrinkage and expansion can be realized by the conductive silicone rubber. Therefore, the conductive part 714 can simultaneously provide electrical contact and elastic restoring force by pressurization.

For example, when the conductive part 714 is pressed by the conductive case 11, the conductive silicone rubber shrinks and the conductive particles come into contact with each other, thereby electrically connecting the conductive particles to each other, When the conductive case 11 is removed, it can be restored to its original state by the elastic force of the conductive rubber. Therefore, since the conductive part 714 is superior in elastic restoring force to the conductive wire 412, 512 or the conductive layer 612 of FIGS. 13 to 16, and is made of the same or similar material as the body 712, Can be reduced, and therefore, can be used for a long period of time.

The contact portion 716 may be formed in a curved shape on both sides of the conductive portion 714. The contact portion 716 may be in contact with the conductive case 11 by a plurality of lines or surfaces to increase the contact area with the conductive case 11. Therefore, the silicone rubber pad 710 can improve the conductivity of electromagnetic waves.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: Contact protection contact for electric shock protection 11: Conductive case
11-1: side portion 11a: fastening groove portion
11b: fastening means 11c: insulator
12: circuit board 12a:
12b: solder 12c: connection wiring
12d: internal wiring 12e: through hole
13: Bracket 13a: Insertion groove
14: LCD module 15: shield can
100, 200, 300, 300 ', 300 ": Electric contact protection contactor
110: conductive gasket 120, 120 ', 120 ": surplus
120a: body 121: outer electrode
122: connection electrode 123a, 123b: intermediate electrode
125a, 125b, 125a ', 125b': internal electrode 127:
127a, 127b, 127c, 129: a discharge material layer 127d, 128, 128 '
220: varistor 220a: sheet layer
220b, 220c: varistor material layer 221: outer electrode
222: connection electrodes 223a and 223b: intermediate electrode
225a, 225b: internal electrodes

Claims (23)

A conductive case having a side portion;
A circuit board having a shield can for shielding electromagnetic waves on an upper surface thereof and having a junction electrically connected to the shield can on a side surface;
A circuit board connected to the circuit board through a solder, a side surface of the conductive case, and a grounding portion of the circuit board through the circuit board, wherein the leakage current of the external power source, An electric shock protection contactor for preventing electric shock from being transmitted to the conductive case; And
And a conductive bracket coupled to the conductive case by fastening means and having an insertion groove into which the fastening means is inserted,
Wherein the circuit board has a through hole through which the fastening means passes. The method according to claim 1,
Wherein the joint is provided in a castellation form. delete The method according to claim 1,
Wherein the contactor for protecting against electric shock passes through the static electricity without being destroyed by insulation when the static electricity flows from the conductive case. The contactor according to claim 1,
A conductive connection portion electrically contacting the conductive case; And
And an electric shock protection element which is connected in series to the conductive connection portion and blocks the leakage current of the external electric power source. 6. The method of claim 5,
The electric shock protection housing has a groove portion on the upper side,
Wherein the conductive connection portion is at least partially inserted into the groove portion. The method according to claim 6,
The electric shock protection device may include a connection electrode on a bottom surface of the groove,
Wherein the conductive connection portion is laminated on the connection electrode through a conductive adhesive layer. 6. The method of claim 5,
Wherein the electric shock protection element has a breakdown voltage (Vbr) satisfying the following equation.
Vbr> Vin,
Where Vin is the rated voltage of the external power source 6. The method of claim 5,
Wherein the conductive connection portion is a conductive gasket, a silicone rubber pad, and a clip-shaped conductor having elasticity. 10. The method of claim 9,
Wherein the conductive gasket comprises at least one of a polymer body, a natural rubber, a sponge, a synthetic rubber, a heat-resistant silicone rubber, and a tube made of a conductive paste by thermocompression bonding. 10. The method of claim 9,
A body made of silicone rubber; And
And a conductive wire vertically formed in the body. 10. The method of claim 9,
A body made of silicone rubber;
A plurality of conductive layers horizontally cross-deposited within the body; And
And a plurality of contact portions formed in a curved shape on the upper side of the body. 10. The method of claim 9,
A body made of non-conductive silicone rubber;
A conductive part filled with a conductive silicone rubber and conductive particles in a plurality of through holes formed vertically through the inside of the body; And
And a plurality of contact portions formed on both sides of the conductive portion in a curved projection. The connector according to claim 9, wherein the clip-
A contact portion having a curved shape and contacting the contacted conductor;
A bending portion extending from the contact portion and having an elastic force; And
And a terminal portion electrically connected to the electric shock protection element. 9. The electric shock protection apparatus according to claim 8,
A body formed by stacking a plurality of sheet layers; And
And at least one pair of internal electrodes formed at predetermined intervals in the inside of the elementary body. 16. The method of claim 15,
And the electric shock protection housing further comprises a gap formed between the pair of inner electrodes. 17. The method of claim 16,
Wherein the gap comprises a layer of a discharge material applied to the inner wall at a predetermined thickness along a height direction. 16. The method of claim 15,
Wherein the pair of inner electrodes are disposed on the same plane. 9. The electric shock protection apparatus according to claim 8,
At least two varistor material layers alternately laminated with a first varistor material layer and a second varistor material layer;
A plurality of first internal electrodes spaced apart by a predetermined distance L on the first varistor material layer; And
And a plurality of second internal electrodes spaced apart from each other by a predetermined distance L on the second varistor material layer. 20. The method of claim 19,
Wherein the breakdown voltage (Vbr) is a sum of a breakdown voltage formed between the first internal electrode and the second internal electrode closest to the first internal electrode and the second internal electrode, respectively. 20. The method of claim 19,
Wherein the first inner electrode and the second inner electrode are disposed so that at least a part thereof does not overlap or overlap each other. 20. The method of claim 19,
Wherein the spacing L between the first inner electrodes or the spacing L between the second inner electrodes is greater than the shortest distance d between the first inner electrodes and the second inner electrodes. 22. A portable electronic device having the contact protection contact assembly according to any one of claims 1, 2 and 4 to 22.

Images