KR20170048985A - Circuit protection contactor and mobile electronic device with the same - Google Patents

Abstract

The present invention provides a contactor for preventing an electric shock, capable of improving electric characteristics, and a portable electronic device including the same. According to one embodiment of the present invention, the contactor comprises: a conductive connection part with elasticity to be in electric contact with a conductor; and an electric shock prevention device connected to the conductive connection part in series and blocking a leakage current of external power supplied from the ground of a printed circuit board (PCB) of the electronic device. The electric shock prevention device comprises: an element in which a plurality of sheet layers are stacked; an electric shock prevention unit including a plurality of internal electrodes disposed inside the element to be separated from each other by a predetermined gap and having a plurality of unit devices, each of which includes a cavity formed between the pair of internal electrodes, disposed in series; and at least one capacitor layer electrically connected to the electric shock prevention unit in parallel and to pass a communication signal supplied from the conductor. The neighboring internal electrodes connected to the cavity are formed with one common electrode.

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, It causes 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 thus, an additional space is required on the circuit board of the portable electronic device, which adversely affects miniaturization.

On the other hand, when a leakage current or static electricity flows from the conductive gasket or the conductive contactor in contact with the conductor, static electricity generates a momentary high voltage and the leakage current is harmful to the human body. In order to achieve a stable function, it is necessary to develop a contactor having enhanced electrical resistance against leakage current or static electricity.

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 or an internal circuit from a leakage current caused by an external power supply and capable of improving electrical characteristics, The purpose of this paper is to provide

In order to solve the above-mentioned problems, the present invention provides an electronic device comprising: a conductive connection portion electrically contacting 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. Here, the electric shock protection housing may include: a body having a plurality of sheet layers stacked; An electric shock protection unit in which a plurality of unit elements each including a pair of inner electrodes disposed at a predetermined interval in the inside of the body and each having a gap formed between the pair of inner electrodes are arranged in series with each other; And at least one capacitor layer electrically connected in parallel to the electric shock protection unit and adapted to pass a communication signal flowing from the electric conductor, wherein the internal electrode connected to the adjacent gap is composed of one common electrode.

According to a preferred embodiment of the present invention, the electric shock protection device can pass the static electricity without being insulated and broken during the introduction of the static electricity from the electric conductor.

Further, the electric shock protection device may have 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 total breakdown voltage of the capacitor layer.

Further, the pair of inner electrodes may be disposed on the same sheet layer.

The gap may be equal to or greater than the gap between the pair of inner electrodes, and the height may be equal to or greater than the thickness of 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.

Also, the discharge material layer may be formed of a non-conductive material or a semiconductor material including metal particles.

Also, the electric shock protection housing may have a receiving portion on the upper side, and at least a part of the conductive connecting portion may be inserted into the receiving portion.

Also, the uppermost capacitor electrode of the capacitor layer may be exposed to the outside in the receiving portion, and the conductive connection portion may be laminated on the uppermost capacitor electrode through the conductive adhesive layer.

The electric shock protection device may further include: a connection electrode formed on an upper surface of the elementary body; And an external electrode formed on a lower surface of the body, and the conductive connection portion may be laminated on the connection electrode through a conductive adhesive layer.

The electric shock protection unit may further include a pair of intermediate electrodes electrically connected to both ends of each of the electric shock protection unit and the at least one capacitor layer.

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

The conductive gasket may include at least one of a polymer body, a natural rubber, a sponge, a synthetic rubber, a foam, 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 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.

The clip-shaped conductor may have a curved shape and may be in contact with the conductor or the circuit board. 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.

On the other hand, the present invention relates to a human body contactable conductor; A circuit board; And an electric shock protection contactor whose one end is electrically connected to the circuit board and the other end is electrically connected in series with the electric conductor.

According to a preferred embodiment of the present invention, the conductor may include at least one of an antenna, a metal case, and a conductive ornamental 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 , Damage to the user such as electric shock through the conductor, or breakage of the internal circuit can be prevented.

In addition, since the present invention includes an electric shock protection device and a contactor integrally, it is not necessary to provide a separate device for implementing the function and an additional space of the device, thereby making it possible to miniaturize the portable electronic device.

In addition, according to the present invention, by arranging a plurality of unit elements for protecting the electric shock protection of an electric shock protection element in series, resistance to external inflow energy can be enhanced by electric shock protection or dispersion of an electrostatic protection function, thereby improving electric characteristics.

1 is a 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,
FIG. 2 is a schematic equivalent circuit diagram for explaining an operation for leakage current when a contactor for protection against electric shock according to an embodiment of the present invention is installed in a portable electronic device;
3 is a schematic equivalent circuit diagram for explaining an operation for electrostatic discharge (ESD) when the contactor for protection against electric shock according to the embodiment of the present invention is installed in a portable electronic device,
FIG. 4 is a schematic equivalent circuit diagram for explaining an operation for a communication signal when the contactor for protection against electric shock according to the embodiment of the present invention is installed in a portable electronic device,
5 is a graph showing the simulation result of the pass frequency band according to the capacitance,
Fig. 6 is an enlarged view of the pass frequency band in Fig. 5,
7 is an external perspective view illustrating an example of an electric shock protection contactor according to an embodiment of the present invention;
FIG. 8 is an overall perspective view of the electric shock protection device of FIG. 7;
Fig. 9 is an exploded perspective view showing the lamination relationship of the plurality of sheet layers in Fig. 8,
10 is a longitudinal sectional view showing the contactor for protection against electric shock shown in Fig. 7,
11 is a view showing the shape of internal electrodes in the electric shock protection device of FIG. 7,
12 is a vertical cross-sectional view showing another example of the electric shock protection element in the example of the electric shock protection contactor according to the embodiment of the present invention,
13 is a view showing the shape of internal electrodes in the electric shock protection device of FIG. 12,
14 to 19 are longitudinal sectional views showing various forms of the electric shock protection device in the example of the electric shock protection contactor according to the embodiment of the present invention,
20 is an external perspective view showing still another example of the electric shock protection device in the example of the electric shock protection contactor according to the embodiment of the present invention,
Fig. 21 is a longitudinal sectional view of the contactor for protection against electric shock shown in Fig. 20,
22 is an external perspective view showing another example of the contactor for protection against electric shock according to the embodiment of the present invention,
23 is a longitudinal sectional view showing the contactor for protection against electric shock shown in Fig. 22,
24 is an external perspective view showing another example of the electric shock protection element in another example of the electric shock protection contactor according to the embodiment of the present invention,
25 is a longitudinal sectional view showing the contactor for protection against electric shock shown in Fig. 24, and Fig.
26 to 28 are sectional views showing various forms of the conductive connection portion of the contactor for protection against electric shock according to the 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 Fig.

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. The conductive connection portion 110 may be a clip-shaped conductor having an elastic force as shown in Fig. 7, or a conductive gasket or a silicone rubber pad 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 .

When the conductive connecting part 110 contacts the conductor 12 like a clip-shaped conductor 210 having an elastic force, the conductive connecting part 210 has a contact part 211 pressed by the circuit board 14 When the bent portion 212 having an elastic force is pushed toward the circuit board 14 and the conductor 12 is separated from the portable electronic device, the bent portion 212 is returned to its original state by the elastic force of the bent portion 212, Can be restored to the upper side of the mounting portion of the main body 14.

The electric shock protection device 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, but is not limited thereto. Such an electric shock protection element 120 may be a prepressor having a capacitor layer.

Here, the electric shock protection device 120 interrupts the leakage current of the external power source flowing from the ground of the circuit board 14, passes the static electricity without being destroyed by insulation when the static electricity flows from the electric conductor 12, Can have a breakdown voltage (Vbr) that meets the following equation to allow a communication signal coming from the conductor 12 to pass:

Vbr> Vin, Vcp> Vbr

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

Vcp is the total dielectric breakdown voltage of the capacitor layer. Here, the total breakdown voltage of the capacitor layer is set such that the capacitor layers 224a and 224b are made up of a plurality of layers and are electrically connected in parallel, so that each of the capacitors 226a and 226b formed by the capacitor electrodes 226a and 226b May be the same as the dielectric breakdown voltage of the capacitor.

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

As shown in FIGS. 2 to 4, 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.

2, when the leakage 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, The generator 100 can be kept open since its 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.

At this time, the capacitor layer can block the DC component included in the leakage current, and since the leakage current has a relatively low frequency as compared with the wireless communication band, the capacitor layer can act as a large impedance to the frequency to block the leakage current.

 As a result, the contactor 100 for protecting against electric shock can protect the user from electric shock by blocking the leakage current from external power supplied from the ground of the circuit part 14 '.

As shown in FIG. 3, when the static electricity flows from the outside through the conductor 12, the electric shock protection contactor 100 functions as an electrostatic protection element such as a suppressor. That is, since the operating voltage of the suppressor for electrostatic discharge is smaller than the instantaneous voltage of the static electricity, the contactor 100 for electric shock protection can pass the static electricity by the instantaneous discharge. As a result, the electric contact protection contactor 100 can lower the electrical resistance when the static electricity flows from the conductor 12, so that the contactor 100 can pass the static electricity without being electrically broken down.

At this time, since the total breakdown voltage Vcp of the capacitor layer is larger than the breakdown voltage Vbr of the electric shock protection part, the static electricity can pass through the electric shock protection part without flowing into the capacitor layer.

Here, the circuit portion 14 'may have a separate protection element for bypassing the static electricity to the ground. As a result, the contactor 100 for protecting the electric shock protection can protect the internal circuit of the following stage by passing static electricity without being broken by insulation caused by the static electricity flowing from the conductor 12.

Further, as shown in FIG. 4, when a communication signal is input through the conductor 12, the protection contactor 100 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. 5 and FIG. 6, 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. 6, it can be seen that the capacitance of the capacitor layer is not influenced by the reception sensitivity at the time of the communication at a capacitance of about 30 pF or more. It is preferable to use a high capacitance of 30. Or more.

As a result, the shielding contactor 100 can pass a communication signal flowing from the conductor 12 through the capacitance of the capacitor layer without attenuation.

Hereinafter, an example of an electric shock protection contactor according to an embodiment of the present invention will be described in detail with reference to FIGS. 7 to 10. FIG.

As shown in FIGS. 7 and 10, the contactor 200 for protecting an electric shock may include a clip-shaped conductor 210 and an electric shock protection element 220 as a conductive connection.

The clip-shaped conductor 210 may be integrally formed of an elastic conductive material. The clip-shaped conductor 210 includes a contact portion 211, a bent portion 212, and a terminal portion 213.

The contact portion 211 has a curved shape and can be in electrical contact with the conductor 12. 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 element 220.

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 clip-shaped conductor 210 may be laminated on the connection electrode 222 of the electric shock protection element 220 through the conductive adhesive layer 111.

8 and 9, the electric shock protection element 220 includes a body 220a, an electric shock protection portion 225, and a plurality of capacitor layers 224a and 224b. The plurality of unit elements each including a pair of internal electrodes 225a, 225b and 225c and an air gap 228 are arranged in series with one another and the capacitor layers 224a and 224b And may include a plurality of capacitor electrodes 226a and 226b.

At this time, the elementary body 220a includes a plurality of sheets (not shown) having electrodes 225a, 225b, 226a, and 226b on at least a part of one surface thereof so as to form the electric shock protection device 220 and the capacitor layers 224a and 224b. Layers 220a-1 to 220b-12 are sequentially stacked, and a plurality of electrodes provided on one surface of each of the layers 220a-1 to 220b-12 are arranged so as to face each other, and then integrally formed through a pressing, firing or curing process.

Such a body 220a may be made of an insulator having a dielectric constant. For example, the insulator may be made of a ceramic material, a low temperature sintered ceramics (LTCC), a high temperature sintered ceramics (HTCC), and a magnetic material. 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 body 220a may have an external electrode 221 formed on a lower surface thereof and a connection electrode 222 formed on an upper surface thereof. At this time, the external electrode 221 is electrically connected to the circuit board 14, and the connection electrode 222 is electrically connected to the clip-shaped conductor 210 disposed above the electric shock protection element 220, .

Each of the plurality of sheet layers 220a-1 to 220a-11 constituting the body 220a is electrically connected to the internal electrodes 225a and 225b and the capacitor layers 224a and 224b constituting the electric shock protection part 225 And one of the capacitor electrodes 226a and 226b may be formed. For example, the upper sheet layers 220a-1,220a-4 to 220a-7 are formed on the lower surface of the corresponding sheet layer of the internal electrodes 225a and 225b and the capacitor electrodes 226a and 226b, The common electrodes 225c and the capacitor electrodes 226a and 226b may be formed on the upper surfaces of the sheet layers 220a-2, 220a-3, and 220a-8 to 220a-11.

Here, the plurality of sheet layers 220a-1 to 220a-11 may be formed with through holes 223a 'and 223b' for forming the intermediate electrodes 223a and 223b. That is, the sheet layers 220a-1 to 220a-10 are formed with through holes 223a 'and 223b' at positions corresponding to both the internal electrodes 225a and 225b The through hole 223a 'is formed at a position corresponding to the internal electrode 225a (left side in the drawing), and the sheet layer 220a-11 is positioned at a position corresponding to the internal electrode 225b (Right side in the drawing) may be formed through the through hole 223b '.

The connection electrode 222 is formed on the top surface of the sheet layer 220a-4 disposed on the uppermost side of the elementary body 220a and the external electrode 221 is disposed on the lowermost sheet 220a-11. As shown in FIG.

Here, the electric shock protection device 220 may be configured to prevent the electric shock protection unit 225 and the capacitor layers 224a and 224b from being electrically connected to the electric shock protection unit 225 and the capacitor layers 224a and 224b, And may further include a pair of intermediate electrodes 223a and 223b to which both ends are electrically connected. The pair of intermediate electrodes 223a and 223b may be formed through the internal electrodes 225a and 225b and the capacitor electrodes 226a and 226b. At this time, the intermediate electrode 223a may be connected to the connection electrode 222, and the intermediate electrode 223b may be connected to the external electrode 221.

The inner electrodes 225a, 225b and 225c are spaced apart from each other within the body 220a. At this time, the pair of inner electrodes opposed to each other form a unit element of the electric shock protection unit 225.

Here, one internal electrode 225a is connected to the intermediate electrode 223a, and the other internal electrode 225b is connected to the intermediate electrode 223b. The internal electrode opposing the internal electrode 225a and the internal electrode opposing the internal electrode 225b may be formed of one common electrode 225c. That is, as a plurality of unit elements are arranged in series, the internal electrodes connected to the neighboring gaps 228 are composed of one common electrode 225c.

In the present embodiment, two unit elements formed by internal electrodes are shown and described, but the present invention is not limited thereto and three or more unit elements may be formed. That is, the internal electrodes 225a, 225b, and 225c include a pair of internal electrodes 225a and 225b connected to the pair of intermediate electrodes 223a and 223b, and a plurality of internal electrodes 225a and 225b connected to the gap 228 adjacent to each other. And a common electrode 225c.

By arranging a plurality of unit elements in series, it is possible to disperse the functions of the unit elements with respect to the static electricity or leakage current flowing from the outside, and therefore the resistance to the introduced energy can be enhanced to improve the electrical characteristics .

The internal electrodes 225a, 225b and 225c and the intermediate electrodes 223a and 223b may include any one or more of Ag, Au, Pt, Pd, Ni and Cu. The electrode 222 may include any one or more of Ag, Ni, and Sn components.

The pair of inner electrodes 225a and 225b and 225c may be formed in various shapes and patterns. The inner electrode 225a and the inner electrode 225c, or the inner electrode 225b, And the internal electrodes 225c may be provided in the same pattern or may have different patterns. That is, the internal electrodes 225a, 225b, and 225c are not limited to a specific pattern when some of the internal electrodes are disposed so as to be opposed to each other in a configuration of the elementary body 220a.

Here, the intervals between the internal electrodes 225a, 225b, and 225c, the areas facing each other, or the lengths overlapping with each other may be configured to satisfy the breakdown voltage Vbr of the electric shock protection device 220, The interval between the internal electrodes 225a and 225c or the interval between the internal electrodes 225b and 225c may be 10 to 100 mu m.

The voids 228 may be formed by, for example, void forming members 227a and 227b. 11, each of the gap forming members 227a and 227b may include a pair of internal electrodes 225a and 225c or a pair of internal electrodes 225b and 225c in the body 220a As shown in FIG. That is, the gap forming members 227a and 227b are provided in the sheet layer 220a-2 in the electric shock protection portion 225, and the sheet layers 220a and 220b are formed so as to abut the internal electrodes 225a, 225b, -2 in the upper side and the lower side.

At this time, the gap forming members 227a and 227b may include discharge material layers 227a-1, 227a-2, and 227a-3 applied to the inner wall of the gap forming members 227a and 227b with a predetermined thickness along the height direction. Here, the discharge material constituting the discharge material layers 227a-1, 227a-2 and 227a-3 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 internal electrodes 225a, 225b, and 225c include an Ag component, the discharge material may include SiC-ZnO-based components. 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.

In addition, 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 a 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 insulating layer blocks the Ag path to provide a further higher insulating property to the discharge material and improves the resistance to static electricity, thereby solving the DC shorting phenomenon when the contact protection contactor 100 is mounted on the electronic part .

Although the present invention has been described with reference to the SiC-ZnO-based material as an example of the discharge material, the discharge material may be a semiconductor material or a metal material suitable for the components of the internal electrodes 225a, 225b, Nonconductive materials including particles can be used

At this time, the discharge material layer applied to the inner walls of the gap forming members 227a and 227b includes a first portion 227a-1 applied along the inner wall of the gap forming members 227a and 227b, And a second portion 227a-2 extending from the upper end of the first portion 227a-1 so as to be in contact with the inner electrode 225a so as to be in contact with the inner electrode 225c, And a third portion 227a-3 that extends to the first portion 227a.

Accordingly, the discharge material layers 227a-1, 227a-2 and 227a-3 are formed not only from the inner walls of the gap forming members 227a and 227b but also from the upper and lower ends of the gap forming members 227a and 227b, The portions 227a-2 and the third portions 227a-3 are formed to extend so that the contact area with the internal electrode 225a and the internal electrode 225c can be widened.

This is because some of the components of the discharge material layers 227a-1, 227a-2 and 227a-3 are vaporized by the electrostatic spark due to the overvoltage, so that a part of the discharge material layers 227a- Thereby enhancing the resistance to static electricity even if it is damaged, so that the discharge material layers 227a-1, 227a-2 and 227a-3 can perform their functions.

An air gap 228 may be formed between the pair of inner electrodes 225a and 225c or the pair of inner electrodes 225b and 225c by the gap forming members 227a and 227b. The static electricity introduced from the outside by the gap 228 can be discharged between the pair of the inner electrodes 225a and 225c or the pair of the inner electrodes 225b and 225c. At this time, the electrical resistance between the pair of inner electrodes 225a and 225c or the pair of inner electrodes 225b and 225c is lowered and the voltage difference between both ends of the protection shield 200 is reduced to a predetermined value or less . Therefore, the contactor 200 for an electric shock protection can pass static electricity without causing internal breakdown.

The gap forming members 227a and 227a may be provided between the pair of inner electrodes 225a and 225c or between the pair of inner electrodes 225b and 225c. As described above, when the number of the gap forming members 227a and 227a disposed between the pair of inner electrodes is increased, the discharge path of the static electricity increases, thereby enhancing the immunity against static electricity.

The capacitor layers 224a and 224b may be at least one stacked capacitor layer for passing communication signals incoming from the conductors 12. The capacitor layers 224a and 224b may be electrically connected in parallel with the electric shock protection unit 225 through the intermediate electrodes 223a and 223b. For example, the upper and lower portions of the electric shock protection unit 225 Or both of the upper and lower sides of the capacitor electrodes 226a and 226b, and may have a plurality of capacitor electrodes 226a and 226b. Here, the capacitor electrode 226a may be connected to the intermediate electrode 223a, and the capacitor electrode 226b may be electrically connected to the intermediate electrode 223b.

These capacitor layers 224a and 224b 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 224a and 224b, An electric shock protection device has an advantage of protecting not only static electricity but also RF receiving sensitivity.

The gap between the capacitor protection layer 225 and the capacitor layers 224a and 224b is larger than the gap between the internal electrodes 225a and 225b and the gap between the capacitor electrodes 226a and 226b desirable. That is, the capacitor layers 224a and 224b prevent the static electricity or leakage current flowing along the internal electrodes 225a, 225b, and 225c from leaking to the adjacent capacitor electrodes 226a and 226b, It is desirable to secure a sufficient distance between the capacitor electrodes 226a and 226b that are closest to the internal electrodes 225a, 225b, and 225c.

Here, the sheet layer on which the electric shock protection part 225 and the upper and lower capacitor layers 224a and 224b are formed may be made of the same material, but may be made of different materials.

Further, at least one sheet layer of the plurality of sheet layers 220a-4 to 220a-11 constituting the capacitor layers 224a and 224b uses the first ceramic material, and the remaining sheet layers use the second ceramic material Can be used.

At this time, the first ceramic material and the second ceramic material may be heterogeneous ceramic materials. Here, the meaning of 'heterogeneous' means that the physical properties are mutually consulted even if the chemical formulas are different from each other or the chemical formulas are the same.

Hereinafter, with reference to FIG. 12 to FIG. 21, an example in which the electric shock protection protector is variously implemented in the contactor for protection against electric shock according to an embodiment of the present invention will be described in detail.

As shown in FIGS. 12 to 15, the space 228 may be formed between the internal electrodes 225a, 225b, and 225c without using the separate space forming member.

At this time, the gap 228 may be disposed between the pair of inner electrodes 225a and 225c or between the pair of inner electrodes 225b and 225c, as shown in FIG. For this purpose, the sheet layer 220a-2 may be provided with a through hole at a position corresponding to the gap 228. [

As shown in FIG. 14, a filling layer 227 'may be disposed in a through-hole formed in the sheet layer 220a-2. That is, a filler 227 'made of a discharge material filled inside can be formed between the pair of inner electrodes 225a and 225c or between the pair of inner electrodes 225b and 225c.

15, the gap 228 may have a discharge material layer 227 "on its side wall. This discharge material layer 227" may be formed of a through-hole formed in the sheet layer 220a-2 And can be applied to the inner wall with a predetermined thickness along the height direction.

As another example, as shown in FIGS. 16 to 19, the electric shock protection device 220 may include internal electrodes 225a ', 225b', and 225c 'that are horizontally spaced apart from each other by a predetermined distance. That is, the electric shock protection element 220 may have a horizontal electrode formed on the same sheet layer.

At this time, a gap 229 may be formed between the pair of inner electrodes 225a 'and 225c' or between the pair of inner electrodes 225b 'and 225c'. The gap 229 may be formed to have a height greater than the height of the internal electrodes 225a ', 225b', and 225c ', and the internal electrodes 225a' and 225c 'or the pair of internal electrodes 225b' and 225c 'May be formed to have a width larger than the interval between the two ends. As the volume of the gap 229 is expanded, even if minute particles are generated from the internal electrodes 225a ', 225b', and 225c 'during the discharge by the static electricity, the internal electrodes 225a' and 225c ' Since the space between the electrodes 225b 'and 225c' is wide, the incidence of defects that can be caused by the particles can be reduced.

Here, the gap 229 is a space in which discharge is initiated by a pair of internal electrodes 225a ', 225b', and 225c 'upon introduction of static electricity, and the volume of the gap 229 satisfies resistance to static electricity . For example, the volume of the gap 229 may be 1-15% of the total volume of the electric shock protection element 200.

17, the electric shock protection device 220 includes internal electrodes 225a ', 225b', and 225c 'spaced from each other on the same sheet layer, and air gaps 229 'Through a through hole.

That is, the through-holes are disposed between a pair of inner electrodes 225a 'and 225c' or a pair of inner electrodes 225b 'and 225c' arranged parallel to each other on the same sheet layer, As shown in FIG.

18, the electric shock protection element 220 may include a discharge material layer 229 "on the sidewall of the gap. The discharge material layer 229 " may be formed on the sheet layer 220a-2 And may be applied to the inner wall of the formed through hole with a predetermined thickness along the height direction.

19, a filler 229 '' 'may be disposed in the through hole formed in the sheet layer 220a-2 of the electric shock protection device 220. That is, A filling material 229 "'made of a discharge material filled in the space between the pair of inner electrodes 225a' and 225c 'or the pair of inner electrodes 225b' and 225c 'may be formed.

As another example, as shown in FIG. 20, the contactor 300 for protecting an electric shock protection may have a receiving portion 320b on the upper side of the electric shock protection element 320. That is, the body 320a has a receiving portion 320b for receiving the clip-shaped conductor 210 on the upper side thereof, and at least a part of the clip-shaped conductor 210 is inserted into the receiving portion 320b. Can be inserted.

At this time, as shown in FIG. 21, the uppermost capacitor electrode 322 of the capacitor layer 224a is formed to be exposed to the outside from the bottom of the accommodating portion 320b. Here, the clip-shaped conductor 210 may be laminated on the uppermost capacitor electrode 322 through the conductive adhesive layer 111.

The receiving portion 320b may serve as a side stopper, and the clip-shaped conductor 210 may not have a separate side stopper, thereby reducing manufacturing costs. In addition, since at least a portion of the clip-shaped conductor 210 is inserted into the accommodating portion 320b, it is possible to prevent warping and bending after coupling. Particularly, in the reflow process after SMD, .

Hereinafter, another example of the contactor for protection against electric shock according to an embodiment of the present invention will be described in detail with reference to FIGS. 22 to 28. FIG.

As shown in FIG. 22, the electric shock protection contactor 400 may include a box-shaped conductive connection portion 410 and an electric shock protection element 220.

At this time, the box-shaped conductive connection part 410 may be a conductive gasket or a silicone rubber pad. Here, the conductive gasket may be integrally formed of a conductive material having an elastic force. Such a conductive gasket may include at least one of a polymer body, a natural rubber, a sponge, a synthetic rubber, a foam, 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.

In addition, the silicone rubber pad includes a body 411 and a conductive wire 412, as shown in Fig.

The body 411 may be made of silicone rubber, and the upper portion thereof may be in surface contact with the conductor 12 such as an antenna or a metal housing, and the lower portion thereof may be electrically connected to the electric shock protection element 220.

The conductive wire 412 may be vertically formed inside the body 411. [ This conductive wire 412 is intended to complement the elastic force of the body 411 while improving electrical contact with the conductor 12.

For example, when the conductive wire 412 is pressed by the conductor 12, when the upper end of the conductive wire 412 is bent downward and the conductor 12 is removed, the conductive wire 412 is restored to its original vertical state, The elastic force can be compensated.

This conductive gasket or silicone rubber pad 410 is in surface contact with a conductor 12 such as a metal housing or antenna or the like and its lower portion is electrically connected to the electric shock protection element 220 . At this time, the conductive gasket or silicone rubber pad 410 may be laminated on the connection electrode 222 of the electric shock protection device 220 through the conductive adhesive layer 111.

10, the electric shock protection device 220 includes a body 220a, an electric shock protection unit 225, and capacitor layers 224a and 224b. The plurality of unit elements each including a pair of internal electrodes 225a, 225b and 225c and an air gap 228 are arranged in series with one another and the capacitor layers 224a and 224b And may include a plurality of capacitor electrodes 226a and 226b. In addition, the electric shock protection element 220 may be constituted by the electric shock protection element 220 shown in Figs. 12 to 19.

At this time, the external electrode 221 is formed on the bottom surface of the body 220a, and the connection electrode 222 is formed on the external surface of the body 220a. The external electrode 221 is electrically connected to the circuit board 14 and the connection electrode 222 is connected to a conductive gasket or a silicone rubber pad 410 disposed on the upper side of the electric shock protection element 220 And can be electrically connected.

As another example, the contactor 500 for an electric shock protection may include a housing portion 320b on the upper side of the electric shock protection element 320, as shown in FIG. That is, the body 320a has a receiving portion 320b for receiving the conductive gasket or the silicone rubber pad 410 on the upper side thereof, and the conductive gasket or the silicone rubber pad 410 May be inserted.

25, the uppermost capacitor electrode 322 of the capacitor layer 224a is formed to be exposed to the outside from the bottom of the accommodating portion 320b. Here, the conductive gasket or the silicone rubber pad 410 may be laminated on the uppermost capacitor electrode 322 through the conductive adhesive layer 111.

Hereinafter, referring to FIG. 26 to FIG. 28, an example in which the conductive connecting part is variously implemented in the contactor for protecting against electric shock according to an embodiment of the present invention will be described in detail.

As shown in FIG. 26, the contact protector for electric shock protection has a conductive connection part formed of a silicone rubber pad 510, which includes a body 511 and a conductive wire 512.

The body 511 may be made of silicone rubber, and the upper portion thereof may be in surface contact with a conductor 12 such as an antenna or a metal housing, and a lower portion thereof may be electrically connected to the electric shock protection elements 220 and 320.

The conductive wire 512 may be formed obliquely inside the body 511. This conductive wire 512 is intended to improve the electrical contact with the conductor 12 and to supplement the elastic force of the body 511.

For example, when the conductive wire 512 is pressed by the conductor 12, when the upper end thereof is tilted to the left and right and the conductor 12 is removed, the conductive wire 512 is restored to its original vertical state, 511 can be compensated for. At this time, if the conductive wire 512 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.

Accordingly, the conductive wire 512 is excellent in the conductivity of the communication signal, has good elastic restoring force, and can be used for a long time, as compared with the vertically formed conductive wire 412 of FIG. 25 bent downward by the pressing force of the conductor 12 .

27, the conductive contactor includes a body 611, a conductive layer 612, and a contact portion 613, the conductive connection portion being 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 devices 220 and 320.

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 conductor 12 and to complement the elasticity of the body 611.

For example, when the conductive layer 612 is pressed by the conductor 12, the conductive layer 612 is pressed downward in the vicinity of the central portion thereof, and when the conductor 12 is removed, the conductive layer 612 is restored to its original horizontal state, The elastic force of the body 611 can be compensated. Therefore, this conductive layer 612 is more elastic than the vertically-formed conductive wire 412 of Fig. 25 bent downward by the pressing force of the conductor 12 or the diagonally formed conductive wire 512 of Fig. 26 inclined to the left and right, And can be used for a long period of time.

The contact portion 613 may be formed as a curved projection on the upper side of the body 611. This contact portion 613 can increase the contact area with the conductor 12 by making a plurality of lines or surfaces contact with the conductor 12 such as an antenna or a metal housing. Accordingly, the silicone rubber pad 610 can improve the conductivity of the communication signal.

28, the contact protector for electric shock protection includes a body 712, a conductive portion 714, and a conductive portion 712. 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 conductor 12 through the contact portion 716 formed on the upper side thereof, and can be electrically connected to the electric shock protection elements 220 and 320 through the contact portion 716 formed on the lower side thereof have.

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 conductor 12 by the conductive particles, and contraction 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 conductor 12, 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 conductor 12 is removed, it can be restored to its original state by the elastic force of the conductive rubber. Therefore, the conductive portion 714 is superior in elastic restoring force as compared with the conductive wires 412, 512 or the conductive layer 612 of FIGS. 25 to 27, 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. Such a contact portion 716 can increase the contact area with the conductor 12 by making a plurality of lines or surfaces contact with the conductor 12. Thus, the silicone rubber pad 710 can improve the conductivity of the communication signal.

The contactor for protection against electric shock as described above can be disposed between the body-contactable conductor 12 and the circuit board 14 in a portable electronic device.

With such an arrangement, the portable electronic device can prevent damage to the user or breakage of the internal circuit through the conductor, improve the electrical characteristics, and suppress the occurrence of sparks.

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, 400, 500: Contactor for protection against electric shock
110: conductive connection part 210: clip-shaped conductor
220, 320: an electric shock protection element 220a, 320a:
221: connecting electrode 222: external electrode
223a, 223b: intermediate electrode 225: electric shock protection part
225a, 225b, 225c: internal electrodes 224a, 224b: capacitor layers
226a, 226b: capacitor electrode 228:
410: box-shaped conductive connection 510, 610, 710: silicon pad

Claims (20)

A conductive connection portion having an elastic force for electrically contacting the conductor of the electronic device; And
And an electric shock protection element which is connected in series to the conductive connection portion and which blocks a leakage current of an external power source which flows from the ground of the circuit board of the electronic device,
The electric shock protection housing,
A body formed by stacking a plurality of sheet layers;
An electric shock protection unit in which a plurality of unit elements each including a pair of inner electrodes disposed at a predetermined interval in the inside of the body and each having a gap formed between the pair of inner electrodes are arranged in series with each other; And
And at least one capacitor layer electrically connected in parallel with the electric shock protection unit, the at least one capacitor layer passing a communication signal input from the electric conductor,
And the internal electrodes connected to the neighboring gaps are formed of one common electrode. 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,
Wherein the electric shock protection element has a breakdown voltage (Vbr) satisfying the following equation.
Vbr> Vin, Vcp> Vbr
Where Vin is the rated voltage of the external power supply of the electronic device,
Vcp is the total breakdown voltage of the capacitor layer The method according to claim 1,
Wherein the pair of inner electrodes and the common electrode are disposed on the same sheet layer. 5. The method of claim 4,
Wherein the gap is greater than or equal to the width of the pair of inner electrodes and the height of the gap is greater than or equal to the thickness of the pair of inner electrodes. The method according to claim 1,
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,
Wherein the discharge material layer is made of a nonconductive material or a semiconductor material including metal particles. The method according to claim 1,
Wherein the electric shock protection housing has a housing portion on the upper side and at least a part of the conductive connector portion is inserted into the housing portion. 9. The method of claim 8,
The uppermost capacitor electrode of the capacitor layer is exposed to the outside from the accommodating portion,
Wherein the conductive connection portion is laminated on the uppermost capacitor electrode through a conductive adhesive layer. The method according to claim 1,
The electric shock protection housing,
A connection electrode formed on an upper surface of the elementary body; And
And an external electrode formed on a lower surface of the elementary body,
Wherein the conductive connection portion is laminated on the connection electrode via a conductive adhesive layer. The method according to claim 1,
Wherein the electric shock protection unit further comprises a pair of intermediate electrodes to which the both ends of each of the electric shock protection unit and the at least one capacitor layer are electrically connected. 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. 13. The method of claim 12,
Wherein the conductive gasket comprises at least one of a polymer body, a natural rubber, a sponge, a synthetic rubber, a foam, a heat-resistant silicone rubber, and a tube made of a conductive paste by thermocompression bonding. 13. The method of claim 12,
Wherein the silicone rubber pad
A body made of silicone rubber; And
And a conductive wire vertically formed inside the body. 13. The method of claim 12,
Wherein the silicone rubber pad
A body made of silicone rubber; And
And a conductive wire formed diagonally inside the body. 13. The method of claim 12,
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. 13. The method of claim 12,
Wherein the silicone rubber pad
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 the shape of a curved projection. 13. The method of claim 12,
The clip-
A contact portion having a curved shape and contacting the conductor or the circuit board;
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. Human contactable conductors;
A circuit board; And
And the electric contact protection contactor according to any one of claims 1 to 18, wherein one end is electrically connected to the circuit board and the other end is electrically connected to the electric conductor in series. 20. The method of claim 19,
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.

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