KR20170004797A - Circuit protection contactor and mobile electronic device with the same - Google Patents

Abstract

Provided are a contactor for electric shock protection and a portable electronic device including the same. The contactor for electric shock protection according to an exemplary embodiment of the present invention includes: a conductive connection part which has elastic force to electrically come into contact with a conductor of the electronic device; and an electric shock protection device which is serially connected to the conductive connection part and blocks a leakage current of an external power source inputted from a ground of a circuit board of the electronic device. Accordingly, the present invention can protect a user from the leakage current due to the external power source.

Description

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

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shock protection contactor and a portable electronic device having the same, and more particularly, to an electric shock protection contactor capable of protecting a user from a leakage current by a power source 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. Accordingly, a conductive gasket is used between the external housing and the internal circuit board of the portable electronic device to reduce the impact from the outside while simultaneously penetrating into the portable electronic device or reducing electromagnetic waves leaking from the portable electronic device.

In addition, the portable electronic device may have a plurality of antennas for each function in accordance with multifunctionality, and at least a part of them may be an internal antenna and disposed in an external housing of the portable electronic device. Therefore, a conductive contactor is used for electrical contact between the antenna disposed in the external housing and the internal circuit board of the portable electronic device.

In addition, portable electronic devices have recently been increasing in adoption of housings made of metal to improve esthetics and robustness.

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.

In addition, when the metal housing is used as an antenna, the conductive gasket or the conductive contactor is required to realize a high capacitance because the signal is attenuated when the capacitance is low, and the RF signal is not transmitted smoothly.

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 therefore, there is a problem that miniaturization is adversely affected because additional space is required on the circuit board of the portable electronic device.

KR 2007-0109332A

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electric shock protection contactor capable of protecting a user from a leakage current by an external power source and a portable electronic device having the same.

It is another object of the present invention to provide a contactor for protecting an internal circuit from leakage current caused by static electricity and a portable electronic device having the same.

It is still another object of the present invention to provide an electric shock protection contactor capable of minimizing attenuation of a communication signal, and a portable electronic device having the contactor.

In order to solve the above-mentioned problems, the present invention provides an electronic device comprising: a conductive connection portion having an elastic force to electrically contact a conductor of an electronic device; And an electric shock protection element which is connected in series to the conductive connection portion and blocks a leakage current of an external electric power source which flows from the ground of the circuit board of the electronic device.

In addition, the electric shock protection device may pass a communication signal flowing from the electric conductor.

In addition, the electric shock protection device may allow the static electricity to pass therethrough without being destroyed by insulation when the static electricity flows from the electric conductor.

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.

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

Vbr> Vin

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

Further, the electric shock protection unit includes an electric shock protection unit and at least one capacitor layer, and the electric shock protection unit has a breakdown voltage (Vbr) satisfying the following formula:

Vbr> Vin, Vcp> Vbr

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

Vcp is the dielectric breakdown voltage of the capacitor layer.

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; And a conductive wire formed obliquely inside 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 clip-shaped conductor includes a contact portion having a curved shape and contacting the contacted conductor; An extension part extending from the contact part and having an elastic force; And a terminal portion electrically connected to the electric shock protection element.

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.

The electric shock protection housing may include: a body having a plurality of sheet layers stacked; At least a pair of internal electrodes formed at predetermined intervals in the inside of the body; And a gap formed between the internal electrodes.

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

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

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 distance L between the first internal electrode and the second internal electrode may be set to be the shortest distance d1 between the first internal electrode and the second internal electrode, (d2).

In addition, the capacitor layer may be electrically connected in parallel with the electric shock protection portion.

In addition, the gap between the capacitor layer and the electric shock protection portion may be larger than the interval between the pair of internal electrodes of the electric shock protection portion.

The electric shock protection housing may include: a body having a plurality of sheet layers stacked; An electric shock protection unit including at least a pair of internal electrodes formed at predetermined intervals in the inside of the body, and a gap formed between the internal electrodes; And at least one laminated capacitor layer for passing the communication signal.

The electric shock protection device may further comprise at least two varistor material layers alternately stacked with a first varistor material layer and a second varistor material layer, a plurality of first inner material layers spaced apart by a predetermined distance L on the first varistor material layer, An electric shock protection unit comprising an electrode and a plurality of second internal electrodes spaced apart by a predetermined distance L on the second varistor material layer; And at least one laminated capacitor layer for passing the communication signal.

On the other hand, the present invention relates to a human body contactable conductor; A circuit board on which a plurality of passive elements and active elements are installed; And an electric shock protection contactor, one end of which is electrically connected to the circuit board and the other end of which is electrically connected in series to the electric conductor, the electric shock protection contactor including: a conductive connection portion having an elastic force to electrically contact the electric conductor; And an electric shock protection device which is connected in series to the conductive connection portion and blocks a leakage current of an external power source flowing from the ground of the circuit board.

In addition, the conductor may include at least one of an antenna, a metal case, and conductive ornaments for communication between the electronic device and an external device.

The contactor for protection against electric shock and the portable electronic device having the contactor according to the embodiment of the present invention may be provided with an electric shock protection element in a contactor connecting a conductor and a circuit board in a portable electronic device in which a conductor such as a metal case is exposed to the outside , There is an advantage that a user can be protected from a leakage current by an external power source.

The present invention has the advantage of protecting the internal circuit from static electricity.

The present invention has the advantage that a high capacitance is realized by adding a capacitor layer to an electric shock protection element of an electric shock protection contactor so that attenuation of a communication signal can be minimized and transmitted.

In addition, since the present invention includes an electric shock protection device and a contactor integrally, there is no need for a separate device for realizing the function and an additional space for the corresponding device, which is advantageous for miniaturization of the portable electronic device.

1 is a cross-sectional view of an example in which an electric shock protection contactor according to an embodiment of the present invention is applied to a portable electronic device.
2 is a cross-sectional view of another example in which an electric shock protection contactor according to an embodiment of the present invention is applied to a portable electronic device.
Figs. 3 to 5 are schematic equivalent circuit diagrams for explaining operations for leakage current, electrostatic discharge (ESD), and communication signals when the contactor for protecting an electric shock protection according to an embodiment of the present invention is installed in a portable electronic device.
6 and 7 are graphs showing simulation results of the pass frequency band according to the capacitance.
8 and 9 are sectional views of an example of an electric shock protection contactor according to an embodiment of the present invention.
10 to 13 are cross-sectional views and perspective views showing various forms of an electric shock protection device of an example of an electric shock protection contactor according to an embodiment of the present invention.
14 and 15 are sectional views showing various forms of an electric shock protection device of an electric shock protection contactor according to an embodiment of the present invention.
16 to 19 are sectional views of another example of an electric shock protection contactor according to an embodiment of the present invention.
20 and 21 are sectional views of still another example of an electric shock protection contactor according to an embodiment of the present invention.
22 and 23 are sectional views showing various forms of the conductive connection portion of the contactor for protection against electric shock according to an embodiment of the present invention.

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.

The contactor 100 for protecting an electric shock according to an embodiment of the present invention includes a conductive connector 110 and an electric shock protection element 120.

Such an electric shock protection contactor 100 is for electrically connecting between a conductor 12 such as an external metal case and a circuit board 14 in a portable electronic device, as shown in Figs.

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 shock protection contactor 100 is urged in response to a pressing force to engage the conductor 12 with the portable electronic device so that when the conductor 12 is released from the portable electronic device, Lt; / RTI >

Here, the conductor 12 may be provided to partially surround or partially surround the side portion of the portable electronic device, and may be an antenna for communication between the portable electronic device and the external device.

The conductive connection 110 may be in electrical contact with the conductor 12 of the portable electronic device and may have an elastic force. Such a conductive connection 110 may be a conductive gasket as shown in Fig. 1, a silicone rubber pad, and a clip-shaped conductor having an elastic force as shown in Fig.

Here, when the conductive connection part 110 is in surface contact with the conductor 12 such as 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 connecting portion 110 can be contracted toward the circuit board 14 by the pressing force of the conductor 12, and when the conductor 12 is separated from the portable electronic device, the conductive connecting portion 110 is restored to its original state by its elastic force .

2, when the conductive connection part is in contact with the conductor 12 like the clip-shaped conductors 211, 212, and 213 having elasticity, the conductive connection part 110 contacts the circuit board 14 When the extension portion 212 having an elastic force is pressed toward the circuit board 14 and the conductor 12 is separated from the portable electronic device as it is pressed by the elastic portion of the extension portion 212, That is, to the upper side of the mounting site of the circuit board 14.

The electric shock protection element 120 may be electrically connected to the conductive connection part 110 in series and may be disposed under the conductive connection part 110, for example. At this time, the external electrode may be disposed on the upper surface of the electric shock protection housing.

Meanwhile, the electric shock protection element 120 may have a groove on the upper side, an external electrode may be provided on the bottom surface of the groove, and the conductive connection part 110 may be laminated on the external electrode through a conductive adhesive layer.

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.

On the other hand, when the conductor 12 has an antenna function, the electric shock protection element 120 may be a suppressor having a capacitor layer or a varistor.

Such an electric shock protection device 120 includes an electric shock protection unit and at least one capacitor layer and is configured to block leakage current of an external power source and to pass a communication signal coming from the electric conductor 120, And may have a breakdown voltage (Vbr) of the protective portion:

Vbr> Vin

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

At this time, when the electric shock protection element 120 has a function of passing the static electricity to protect the circuit portion at the rear end, the breakdown voltage Vbr of the electric shock protection portion satisfies the following condition:

Vcp> Vbr

Vcp is the dielectric breakdown voltage of the capacitor layer.

As shown in FIGS. 3 to 5, the electric shock protection device 120 may have different functions depending on a leakage current due to an external power source, a static electricity flowing from the electric conductor 12, and a communication signal.

3, when the leak current of the external power source flows into the conductor 12 through the circuit portion 14 'of the circuit board 14, for example, the ground, 120 can be kept open since the breakdown voltage (or trigger voltage) Vbr is larger than the overvoltage due to the leakage current. That is, since the breakdown voltage (Vbr) of the electric shock protection element 120 is larger than the rated voltage of the external power source of the portable electronic device, the electric conductor 12, which can be bonded to the body, It is possible to prevent the leakage current from being transmitted.

In this case, when the capacitor layer is provided in the electric shock protection device 120, the capacitor layer can block the DC component included in the leakage current, and since the leakage current has a relatively lower frequency than the radio communication band, So that the leakage current can be cut off.

 As a result, the electric shock protection element 120 can protect the user from electric shock by blocking the leakage current to the external power source that flows from the ground of the circuit portion 14 '.

Further, as shown in FIG. 4, when static electricity flows from the outside through the conductor 12, the electric shock protection element 120 functions as an electrostatic protection element such as a suppressor or a varistor. That is, in the case of the varistor type, since the breakdown voltage Vbr is smaller than the instantaneous voltage of the static electricity, the electric shock protection element 120 can be electrically conducted to pass the static electricity. When the electric shock protection element 120 is in the form of a supercapacitor, since the operating voltage of the suppressor for electrostatic discharge is smaller than the instantaneous voltage of the static electricity, the static electricity can be passed by the instantaneous discharge. As a result, the electric shock resistance protective element 120 can lower the electrical resistance when the static electricity flows from the conductor 12, so that the static electricity can pass without being electrically broken down.

In this case, when the capacitor layer is provided in the electric shock protection device 120, since the insulation breakdown voltage Vcp of the capacitor layer is larger than the breakdown voltage Vbr of the electric shock protection portion, the static electricity does not flow into the capacitor layer, It can only pass through the protective part.

Here, the circuit portion 14 'may have a separate protection element for bypassing the static electricity to the ground. As a result, the electric shock protection element 120 can pass the static electricity without being broken down by the static electricity flowing from the conductor 12, thereby protecting the internal circuit of the following stage.

Further, as shown in Fig. 5, when a communication signal is input through the conductor 12, the electric shock protection element 120 functions as a capacitor. That is, the electric shock protection element 120 keeps the electric shock protection part in the open state to shut off the conductor 12 and the circuit part 14 ', but can pass the communication signal in which the capacitor layer inside is passed. In this way, the capacitor layer of the electric shock protection element 120 can provide the inflow path of the communication signal.

Here, the capacitance of the capacitor layer is preferably set so as to pass the communication signal of the main wireless communication band without attenuation. As shown in FIG. 6 and FIG. 7, according to the simulation result of the pass frequency band according to the capacitance, substantially no loss is transmitted in the mobile radio communication frequency band (700 MHz to 2.6 GHz) And exhibits a short-circuit phenomenon electrically.

However, as shown in Fig. 7, it can be seen that the capacitance of the capacitor layer is not influenced by the reception sensitivity in the case of a capacitance of about 30 pF or more. It is preferable to use a high capacitance of 30. Or more.

As a result, the electric shock protection element 120 can pass the communication signal introduced from the conductor 12 by the high capacitance of the capacitor layer without attenuation.

Hereinafter, the contactor for protection against electric shock according to an embodiment of the present invention will be described in detail with reference to FIGS. 8 and 9. FIG.

As shown in FIGS. 8 and 9, 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.

The upper portion of the conductive gasket 110 may be in surface contact with the conductor 12 such as a metal housing or an antenna and the lower portion thereof may be electrically connected to the electric shock protection element 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. 8, 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 the conductive gasket 110 may be laminated through the conductive adhesive layer 111. In this case, .

In addition, as shown in FIG. 9, 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. That is, the electric shock protection element 120 may be a single element such as a suppressor or a varistor. Alternatively, when the contactor for protecting the electric shock protection is required to have a function of passing a communication signal, such as when the contactor is connected to a conductor such as an antenna, the electric shock protection element 120 may include a surge absorber or a capacitor Layer may be a varistor.

10, when the electric shock protection element 120 is a single element of the suppressor, the electric shock protection element 120 includes the element body 120a, the internal electrodes 125a and 125b and the gap formation member 127 do.

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 on the circuit board 14 and the upper surface may be provided with a connection electrode 122 for connecting with the conductive gasket 110. 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 the SiC particles to form an insulating layer having a low durability.

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.

11, in the case where the electric shock protection element 120 is a suppressor composite element having a capacitor layer, the electric shock protection element 120 includes a body 120a, an electric shock protection portion, and a capacitor layer 124a, 124b ). Here, the electric shock protection portion may include the internal electrodes 125a and 125b and the gap forming member 127. [

At this time, the elementary body 120a may be a stack of a plurality of sheet layers. Here, the sheet layers on which the upper capacitor layer 124a, the lower capacitor layer 124b, and the internal electrodes 125a and 125b are formed may be made of the same material, but may be made of different materials different from each other.

The capacitor layers 124a and 124b may be at least one stacked capacitor layer for passing communication signals. The capacitor layers 124a and 124b may be electrically connected in parallel with the electric shock protection portion, for example, on the upper or lower portion of the electric shock protection portion, and may include the capacitor electrodes 126a and 126b.

These capacitor layers 124a and 124b are intended to provide additional capacitance of the electric shock protection element 120 to improve RF reception sensitivity.

Unlike the prior art in which a separate component for increasing the RF reception sensitivity is used together with a suppressor, a varistor or a zener diode for protecting the internal circuit against static electricity by the capacitor layers 124a and 124b, The suppressor has the advantage of protecting against static electricity as well as increasing the sensitivity of RF reception.

As shown in FIG. 12, the space 128 may be formed between the internal electrodes 125a and 125b without using a 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.

As shown in Fig. 13, the electric shock protection element 120 " may have a horizontal electrode formed on the same plane. That is, the electric shock protection device 120 '' may include a pair of internal electrodes 125a 'and 126b' that are horizontally spaced apart from each other by a predetermined distance.

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.

14, when the electric shock protection element 220 is a varistor single element, 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 circuit board 14 and a connection electrode 222 for connecting to a conductive gasket or a clip- have.

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 including 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 .

The distance L between the first internal electrode 225a and the adjacent second internal electrode 225b may be smaller than the distance L between the first internal electrode 225a and the second internal electrode 225b, Is preferably formed to be larger than the sum of the shortest distance (d1) and the shortest distance (d2) between the neighboring second inner electrodes (225b).

As shown in FIG. 15, when the electric shock protection element 220 is a varistor composite element having a capacitor layer, the electric shock protection element 220 includes an electric shock protection portion and a capacitor layer 224a and 224b. Here, the electric shock protection unit includes varistor material layers 220b and 220c and internal electrodes 225a and 225b.

The capacitor layers 224a and 224b may be at least one stacked capacitor layer that passes communication signals. The capacitor layers 224a and 224b may be electrically connected in parallel with the electric shock protection portion, for example, on the upper or lower portion of the electric shock protection portion, and may include the capacitor electrodes 226a and 226b.

Here, the sheet layer 220a forming the capacitor layers 224a and 224b may be made of an insulating material having a dielectric constant, for example, a ceramic material, in which a plurality of sheet layers are laminated. At this time, the ceramic material is a metal-oxide compounds, the 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 or more of the selected one kinds . Meanwhile, the upper capacitor layer 224a and the lower capacitor layer 224b may be made of the same material, but may be made of different materials, which are different from each other.

The first internal electrode or the second internal electrode does not leak static electricity or leakage current to the adjacent capacitor electrodes 226a and 226b of the internal electrodes 225a and 225b but is normally leaked between the internal electrodes 225a and 225b It is preferable that the interval is set so that it can proceed.

That is, each of the first internal electrode 225a and the second internal electrode 225b is formed such that the distance between the adjacent capacitor electrodes 226a and 226b is larger than the spacing distance L between the internal electrodes 225a and 225b .

As shown in FIGS. 16 to 19, the contactor 200, 200 'is a clip-shaped conductor 210 having a contact portion 211, an extension portion 212 and a terminal portion 213.

The contact portion 211 has a curved shape and can make electrical contact with the conductor 12 as shown in Fig. The extension 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 extension 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. 16, 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. 17 to 19, 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, since at least a part of the clip-shaped conductor 210 is inserted into the groove 1202, warping and bending after joining can be prevented, and in particular, it is possible to prevent a fall in the reflow process after the SMD, .

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. For example, the electric shock protection element 120 may have a structure that is disposed horizontally with respect to the terminal portion 213. In this case, the terminal portion 213 may be configured not to contact the circuit board 14. [

As shown in FIGS. 20 and 21, the contactor 300, 300 'for the protection of electric shock is a case where the conductive connection portion is the silicone rubber pad 310, and the silicone rubber pad 310 includes the body 311 and the conductive wire 312, .

The body 311 may be made of silicone rubber and its upper surface may be in surface contact with a conductor 12 such as an antenna or a metal housing and its lower portion may be electrically connected to the electric shock protection element 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 conductor 12 and to complement the elastic force of the body 311.

For example, when the conductive wire 312 is pressed by the conductor 12, when the upper end thereof is bent downward and the conductor 12 is removed, the conductive wire 312 is restored to its original vertical state, The elastic force can be compensated.

22, the shielding contactor includes a body 321, and a conductive wire 322 when the conductive connection portion is another type of silicone rubber pad 320, .

The body 321 may be made of silicone rubber, the upper surface of which may be in face-to-face contact with a conductor 12, such as an antenna or a metal housing, and the lower portion thereof may be electrically connected to the surgeon 120.

The conductive wire 322 may be formed obliquely inside the body 321. This conductive wire 322 is intended to improve the electrical contact with the conductor 12 and to complement the elasticity of the body 321.

For example, when the conductive wire 312 is pressed by the conductor 12, when the upper end of the conductive wire 312 is tilted to the left and right and the conductor 12 is removed, the conductive wire 312 is restored to its original vertical state, The elastic force can be compensated. At this time, if the conductive wire 312 is tilted by the pressing force of the conductor 12, the contact with the conductor 12 becomes excellent, and consequently, the conductivity of the communication signal can be improved.

Therefore, the conductive wire 322 is excellent in the conductivity of the communication signal, has good elastic restoring force, and can be used for a long time, compared with the vertically formed conductive wire 312 of FIG. 20 bent downward by the pressing force of the conductor 12 .

23, the contact protector for electric shock protection includes a body 331, a conductive layer 332, and a contact portion 333 in the case where the conductive connection portion is a silicone rubber pad 330, .

The body 331 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 332 may be horizontally cross-deposited within the body 331 and may be a plurality of layers of curable Ag paste. This conductive layer 332 is intended to improve the electrical contact with the conductor 12 and to complement the elastic force of the body 331.

For example, when the conductive layer 332 is pressed by the conductor 12, the conductive layer 332 is pushed downward near the central portion thereof, and when the conductor 12 is removed, the conductive layer 332 is restored to its original horizontal state, Can be compensated for. This conductive layer 332 has elastic restoring force compared to the vertically formed conductive wire 312 of FIG. 20 bent downward by the pressing force of the conductor 12 or the obliquely formed conductive wire 322 of FIG. 22 tilted to the left and right Excellent and can be used for a long period of time.

The contact portion 333 may be formed as a curved projection on the upper side of the body 332. Such a contact portion 333 can increase the contact area with the conductor 12 by a plurality of lines or surface contacts with the conductor 12 such as an antenna or a metal housing. Thus, the silicone rubber pad 330 can improve the conductivity of the communication signal.

The contactor for protection against electric shock as described above can be disposed on the circuit board 14 and the human-contactable conductor 12 in the portable electronic device. Here, the electric shock protection contactor may be mounted on the mounting terminal of the circuit board 14.

With such an arrangement, the portable electronic device can protect the user from the leakage current caused by the external power source by blocking the leakage current caused by the external power source flowing from the ground of the circuit board 14, and at the same time, 12, the static electricity is passed without dielectric breakdown, and the communication signal flowing from the conductor 12 is passed without attenuation, thereby protecting the internal circuit from static electricity and realizing a high capacitance.

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.

12: conductor 14: circuit board
14 ': Circuit part
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
124a, 124b: capacitor layers 125a, 125b, 125a ', 125b': internal electrodes
126a, 126b: capacitor electrode 127: cavity forming member
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
224a, 224b: capacitor layers 225a, 225b: internal electrodes
226a, 226b: Capacitor electrode

Claims (31)

A conductive connection portion having an elastic force for electrically contacting the conductor of the electronic device; And
And an electric shock protection element connected in series to the conductive connection portion to cut off a leakage current of an external power source flowing from the ground of the circuit board of the electronic device. The method according to claim 1,
And the electric shock protection element passes a communication signal flowing from the electric conductor. The method according to claim 1,
Wherein the electric shock protection device allows the static electricity to pass without being destroyed by insulation when the static electricity flows from the electric conductor. The method according to claim 1,
The electric shock protection housing has a groove portion on the upper side,
And the conductive connection portion is at least partially inserted into the groove portion. The method according to claim 1,
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 supply of the electronic device 3. The method of claim 2,
Wherein the electric shock protection device includes an electric shock protection portion and at least one capacitor layer,
Wherein the electric shock protection unit has a breakdown voltage (Vbr) satisfying the following expression.
Vbr> Vin, Vcp> Vbr
Where Vin is the rated voltage of the external power supply of the electronic device,
Vcp is an insulation breakdown voltage of the capacitor layer The method according to claim 1,
The conductive connection portion is a conductive gasket, a silicone rubber pad, and a clip-shaped conductor having elasticity. 8. The method of claim 7,
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. 8. The method of claim 7,
Wherein the silicone rubber pad
A body made of silicone rubber; And
And a conductive wire vertically formed inside the body. 8. The method of claim 7,
Wherein the silicone rubber pad
A body made of silicone rubber; And
And a conductive wire formed diagonally inside the body. 8. The method of claim 7,
Wherein the silicone rubber pad
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 the shape of a curved projection on the upper side of the body. 8. The method of claim 7,
The clip-
A contact portion having a curved shape and contacting the contacted conductor;
An extension part extending from the contact part and having an elastic force; And
And a terminal portion electrically connected to the electric shock protection element. 5. The method of claim 4,
Wherein the electric shock protection housing is provided with an external electrode on a bottom surface of the groove portion,
Wherein the conductive connection portion is laminated on the external electrode through a conductive adhesive layer. 6. The method of claim 5,
The electric shock protection housing,
A body formed by stacking a plurality of sheet layers;
At least a pair of internal electrodes formed at predetermined intervals in the inside of the body; And
And an air gap formed between the internal electrodes. 15. The method of claim 14,
Wherein the pair of inner electrodes are disposed on the same plane. 15. The method of claim 14,
Wherein the gap comprises a layer of a discharge material applied on the inner wall at a predetermined thickness along a height direction. 6. The method of claim 5,
The electric shock protection housing,
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 by a predetermined distance L on the second varistor material layer. 18. The method of claim 17,
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 each other. 18. The method of claim 17,
Wherein each of the first internal electrode and the second internal electrode is disposed so that at least a part of the first internal electrode and the second internal electrode do not overlap or overlap with each other. 19. The method of claim 18,
The distance L between the first internal electrode and the second internal electrode is set to be the shortest distance d2 between the first internal electrode and the second internal electrode and between the shortest distance d1 between the first internal electrode and the second internal electrode, ) Is greater than the sum of the contacts. The method according to claim 6,
Wherein the capacitor layer is electrically connected in parallel with the electric shock protection portion. The method according to claim 6,
Wherein an interval between the capacitor layer and the electric shock protection portion is larger than an interval between a pair of internal electrodes of the electric shock protection portion. The method according to claim 6,
The electric shock protection housing,
A body formed by stacking a plurality of sheet layers;
An electric shock protection unit including at least a pair of internal electrodes formed at predetermined intervals in the inside of the body, and a gap formed between the internal electrodes; And
And at least one laminated capacitor layer through which the communication signal is passed. 24. The method of claim 23,
Wherein the pair of inner electrodes are disposed on the same plane. 24. The method of claim 23,
Wherein the gap comprises a layer of a discharge material applied on the inner wall at a predetermined thickness along a height direction. The method according to claim 6,
The electric shock protection housing,
At least two varistor material layers alternately laminated with a first varistor material layer and a second varistor material layer, a plurality of first inner electrodes spaced apart by a constant distance (L) on the first varistor material layer, An electric shock protection unit including a plurality of second internal electrodes spaced apart by a predetermined distance L on a varistor material layer; And
And at least one laminated capacitor layer through which the communication signal is passed. 27. The method of claim 26,
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 each other. 27. The method of claim 26,
Wherein each of the first internal electrode and the second internal electrode is disposed so that at least a part of the first internal electrode and the second internal electrode do not overlap or overlap with each other. 27. The method of claim 26,
The distance L between the first internal electrode and the second internal electrode is set to be the shortest distance d2 between the first internal electrode and the second internal electrode and between the shortest distance d1 between the first internal electrode and the second internal electrode, ) Is greater than the sum of the contacts. Human contactable conductors;
A circuit board on which a plurality of passive elements and active elements are installed; And
And an electric shock protection contactor, one end of which is electrically connected to the circuit board and the other end of which is electrically connected in series to the electric conductor,
The electric shock protection contactor includes:
A conductive connection portion having an elastic force for electrically contacting the conductor; And
And an electric shock protection device which is connected in series to the conductive connection portion and which blocks a leakage current of an external power source flowing from the ground of the circuit board. 31. The method of claim 30,
Wherein the conductor comprises at least one of an antenna, a metal case, and a conductive ornament for communication between the electronic device and an external device.

Images