KR20170069038A

KR20170069038A - Circuit protection contactor and mobile electronic device with the same

Info

Publication number: KR20170069038A
Application number: KR1020150176240A
Authority: KR
Inventors: 임병국; 최윤석; 황윤호; 최재우; 박규환
Original assignee: 주식회사 아모텍
Priority date: 2015-12-10
Filing date: 2015-12-10
Publication date: 2017-06-20

Abstract

There is provided an electric shock protection contactor and a portable electronic device having the contactor. An electric shock protection contactor according to an exemplary embodiment of the present invention is a contactor disposed between a conductor of an electronic device and a circuit board and includes at least one partition wall and a plurality of sub holes based on the at least one partition wall A body having a plurality of holes made of a non-conductive silicone rubber; An electric shock protection unit including at least a pair of inner electrodes disposed at a predetermined interval inside the body and a gap formed between the pair of inner electrodes; At least one capacitor portion having a plurality of capacitor electrodes on at least one side of the electric shock protection portion; And a plurality of contact portions formed on the upper and lower sides of the body in a curved shape on the pair of inner electrodes and the plurality of capacitor electrodes, wherein the pair of inner electrodes and the plurality of capacitor electrodes are connected to the And the plurality of holes filled with the conductive silicone rubber and the conductive particles in the subhole, wherein the electric shock protection portion has a breakdown voltage (Vbr) satisfying the following formula, and the electric shock protection portion satisfies the following formula Wherein Vb is a rated voltage of an external power supply of the electronic device and Vcp is an insulation breakdown voltage of the capacitor portion. have.

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 integrating the additional component element with the conductive gasket or the conductive contactor, the two parts must be electrically arranged in series, and thus the problem of increasing the volume in the thickness or the longitudinal direction has been encountered.

Accordingly, it is inevitable to develop a contactor in which a component element for protecting a user or an internal circuit and a conductive gasket or a conductive contactor are made of the same material.

KR 2007-0109332A

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electric shock protection contactor having a function for protecting a user or an internal circuit and a portable electronic device having the same.

Another object of the present invention is to provide an electric shock protection contactor and a portable electronic device having the same which are made of the same material as the electric shock protection element and the conductive contactor.

According to an aspect of the present invention, there is provided a contactor disposed between a conductor and a circuit board of an electronic device, the contactor including at least one partition wall and a plurality of sub holes based on the at least one partition wall, A body having a plurality of holes made of a conductive silicone rubber; An electric shock protection unit including at least a pair of inner electrodes disposed at a predetermined interval inside the body and a gap formed between the pair of inner electrodes; At least one capacitor portion having a plurality of capacitor electrodes on at least one side of the electric shock protection portion; And a plurality of contact portions formed on the upper and lower sides of the body in a curved shape on the pair of inner electrodes and the plurality of capacitor electrodes, wherein the pair of inner electrodes and the plurality of capacitor electrodes are connected to the Wherein the electric shock protection portion has a breakdown voltage (Vbr) satisfying the following formula: [Expression] Vbr> Vin, Vcp> Vbr, wherein the electric resistance protection portion comprises a plurality of holes filled with conductive silicone rubber and conductive particles in the sub- Vin is a rated voltage of an external power supply of the electronic device, and Vcp is an insulation breakdown voltage of the capacitor portion.

According to a preferred embodiment of the present invention, the electric shock protection unit is capable of blocking a leakage current of an external power source flowing from the ground of the circuit board of the electronic device.

In addition, the capacitor unit may pass a communication signal flowing from the conductor.

In addition, the electric shock protection unit may allow static electricity to pass therethrough without causing insulation breakdown when static electricity flows from the electric conductor.

The gap between the capacitor portion and the electric shock protection portion may be larger than the interval between the pair of internal electrodes of the electric shock protection portion.

In addition, the pair of internal electrodes may be arranged so that at least a part of them faces each other.

In addition, the pair of internal electrodes may further include a conductive reinforcing material at a boundary portion with the gap.

The pair of inner electrodes may be arranged on the same plane.

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.

In addition, the gap may be arranged in the vertical or horizontal direction about the internal electrode.

In addition, the gap may include a layer of a discharge material applied on the inner wall at a predetermined thickness along the height direction.

Also, the discharge material layer may be made of a nonconductive material or a semiconductor material including metal particles.

In addition, the conductive particles may include at least one of a plate-like particle and a spherical particle.

The conductive particles may be made of a metal selected from gold, silver, iron, copper, zinc, chromium, nickel, cobalt, aluminum, and combinations thereof.

The barrier rib may be formed of at least one of acrylic, PC, PET, silicon, ceramic fibers having insulating properties, metal mesh coated with an insulating material, and non-conductive silicone rubber.

In addition, the subhole may have at least one cross section of a triangle, a quadrangle, a pentagon, a hexagon, a circle, and an ellipse.

Also, the shape of the hole may be determined based on a shape in which the two or more sub-holes are connected.

On the other hand, the present invention provides a human body comprising: a body-contactable conductor; A circuit board; And an electric shock protection contactor disposed between the conductor and the circuit board and electrically connected in series, wherein the electric shock protection contactor is a contactor disposed between the conductor of the electronic device and the circuit board, A body including a plurality of holes made of a non-conductive silicone rubber, the body having a plurality of holes based on the barrier and the at least one barrier rib; An electric shock protection unit including at least a pair of inner electrodes disposed at a predetermined interval inside the body and a gap formed between the pair of inner electrodes; At least one capacitor portion having a plurality of capacitor electrodes on at least one side of the electric shock protection portion; And a plurality of contact portions formed on the upper and lower sides of the body in a curved shape on the pair of inner electrodes and the plurality of capacitor electrodes, wherein the pair of inner electrodes and the plurality of capacitor electrodes are connected to the Wherein the electric shock protection portion has a breakdown voltage (Vbr) satisfying the following formula: [Expression] Vbr> Vin, Vcp> Vbr, wherein the electric resistance protection portion comprises a plurality of holes filled with conductive silicone rubber and conductive particles in the sub- Vin is a rated voltage of an external power supply of the electronic device, and Vcp is provided as an insulation breakdown voltage of the capacitor portion.

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.

Further, according to the present invention, since the electric shock protection device and the contactor are made of the same material, the whole volume can be reduced without increasing the volume, and the deformation due to external physical impact can be minimized.

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,
FIG. 7 is a top cross-sectional view illustrating a shape of a sub-hole and a shape of an internal electrode and a capacitor electrode determined based on the sub-hole in the contactor for protection against electric shock according to an embodiment of the present invention.
8 is a top cross-sectional view showing another example of the shapes of the sub-holes and the shapes of the internal electrodes and the capacitor electrodes determined based on the sub-holes in FIG. 7, and
9 is a cross-sectional view of another example constituting the gap 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.

An electric shock protection contactor 100 according to an embodiment of the present invention includes a body 101, an electric shock protection portion 110, and a capacitor layer 120a and 120b.

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.

At this time, the electric shock protection unit 110 may be in the form of a surplus.

The electric shock protection unit 110 blocks the leakage current of the external power source from the ground of the circuit board 14 and permits the static electricity to pass therethrough without being destroyed by insulation when the static electricity flows from the electric conductor 12, 12 to satisfy the following equation: < RTI ID = 0.0 > Vbr < / RTI >

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.

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

The body 101 may be formed of a non-conductive silicone rubber, and may have a plurality of holes 112, 122, and 132 vertically formed therein. At this time, the body 101 contacts the conductor 12 through the contact portions 116 and 136 formed on the upper side thereof, and electrically contacts the circuit board 14 through the contact portions 126 and 136 formed on the lower side thereof .

In this case, at least one partition wall 141 may be formed in the plurality of holes 112, 122 and 132 formed in the body 101, and the holes 112, 122, 132 may have a plurality of sub-holes 143 formed therein.

Here, the barrier ribs 141 may be made of any one material selected from acrylic, PC, PET, silicon, ceramic fiber, and metal mesh coated with an insulating material, but is not limited thereto. The barrier ribs 141 may be formed of the same or similar material as the body 101, and may be made of non-conductive silicone rubber, for example. The height of the barrier ribs 141 may be lower than or equal to the upper surface or the lower surface of the body 101. In this case, when the height of the entire partition wall 141 is lower than the upper or lower surface of the body 101, when the partition wall 141 is made of a material harder than the body 101, It is possible to prevent the elasticity of the internal electrode and the capacitor electrode from being reduced.

The electric shock protection unit 110 includes an internal electrode and a gap 118. At this time, the internal electrodes are spaced apart from each other within the body 101, and may be formed of at least one pair. Here, the pair of inner electrodes may be arranged so that a part of them overlap each other.

The interval between the pair of inner electrodes may be an interval to satisfy the breakdown voltage Vbr of the electric shock protection unit 110, and may be, for example, 10 to 100 탆.

The pair of inner electrodes may be made of conductive silicone rubber and conductive particles. At this time, the plurality of sub-holes 143 formed in the holes 112 and 122 in the pair of internal electrodes can fill the conductive silicone rubber and the conductive particles 114 and 124 together. The conductive silicone rubber has a function of fixing the position of the conductive particles 114 in each of the sub holes 143 and the conductive particles 114 and 124 are filled in the sub holes 143. [ Can be regularly or irregularly distributed in the conductive silicone rubber.

If pressure or heat is not applied to the conductive particles 114 and 124, the conductive particles 114 and 124 are not separated from each other and are not energized. When pressure or heat is externally applied, the conductive particles 114 and 124 are brought into contact with each other It can be energized.

These conductive particles 114 and 124 include at least one of a plate-like particle, a spherical particle, an elliptic spherical particle, and a polyhedral-type particle, and may be formed of gold, silver, iron, copper, zinc, chromium, nickel, cobalt, aluminum, And at least one of them may be formed by pressing.

Such a pair of inner electrodes can realize electrical contact with the conductor 12 or the circuit board 14 by the conductive particles 114 and 124, and contraction and expansion can be realized by the conductive silicone rubber. Therefore, the pair of inner electrodes can simultaneously provide electrical contact and elastic restoring force by pressurization.

For example, when the pair of inner electrodes are pressed by the conductor 12, the conductive silicone rubber shrinks and the conductive particles 114 contact with each other, When the connection is made and the conductor 12 is removed, it can be restored to its original state by the elastic force of the conductive rubber. Accordingly, since the pair of inner electrodes are made of the same material as the body 101, the deformation of the inner portion can be reduced, and thus, the long-term use of the inner electrode can be possible.

In addition, the internal electrode space is divided into a plurality of small inner diameter tube shapes such as the sub holes 143 by the partition walls 141 formed on the internal electrodes, so that when the conductive silicone rubber shrinks and expands, The effect can be increased.

At this time, the pair of inner electrodes may further include a conductive reinforcing material at a boundary portion with the cavity 118. This conductive reinforcing material prevents the conductive particles 114 from protruding into the gap 118 and prevents the gap 118 from being damaged when the gap 118 is formed as an empty space without using the gap forming member. The electrical contact resistance can be reduced so that the electrostatic discharge can be effectively performed.

Here, the contact portion 116 may be formed as a curved projection at one end of the pair of internal electrodes. Such a contact portion 116 can increase the contact area with the conductor 12 or the circuit board 14 by making a plurality of lines or surfaces contact with the conductor 12 or the circuit board 14. Therefore, the conductivity of the electrical signal can be improved by the pair of internal electrodes. According to the above description, the contact portion 116 is formed in the shape of a curved projection. However, the contact portion 116 is not limited thereto and may be formed in various shapes such as a dome, a hemisphere, and a truncated pyramid.

The gap 118 may be formed between the pair of inner electrodes. These voids 118 may be formed, for example, by a void forming member. That is, the gap forming member can be inserted between the pair of inner electrodes in the body 101. [ At this time, the gap 118 may be coated on the inner wall of the gap 118 with a predetermined thickness along the height direction.

Here, the discharge material constituting the discharge material layer 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, the discharge material may include a SiC-ZnO-based material. 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 can block the Ag path to provide even higher insulation to the discharge material and improve the resistance to static electricity, thereby solving the DC short phenomenon when the contact protection contactor 100 is mounted on the electronic part do.

Here, the discharge material includes a SiC-ZnO-based material. However, the present invention is not limited thereto. The discharge material may include a semiconductor material suitable for a component of the pair of internal electrodes, A conductive material may be used

The discharging material layer applied to the inner wall of the gap forming member may include a first portion to be coated along the inner wall of the gap forming member and a second portion to be brought into contact with the first inner electrode from the upper end of the first portion, And a third portion extending from the lower end of the first portion so as to be in contact with the second internal electrode 123b.

As a result, the discharge material layer is formed not only on the inner wall of the gap forming member but also on the upper and lower ends of the gap forming member so that the second and third portions extend from each other, .

This is because, even if a part of the constituent elements of the discharge material layer is vaporized by the electrostatic spark due to the overvoltage to damage a part of the discharge material layer, resistance to static electricity is strengthened so that the discharge material layer can perform its function It is for this reason.

A gap can be formed between the pair of inner electrodes by the gap 118. [ The static electricity introduced from the outside by such a gap can be discharged between the pair of internal electrodes. At this time, the electrical resistance between the pair of inner electrodes is lowered, and the voltage difference between the both ends of the contactor 100 can be reduced to a certain value or less. Therefore, the contactor 100 for protecting the electric shock protection can pass static electricity without causing internal breakdown.

Alternatively, the electric shock protection portion 110 may be formed with voids 118 in an empty space between the pair of internal electrodes without using a separate void forming member. At this time, the sidewall of the cavity 118 may have a layer of a discharge material.

The capacitor layers 120a and 120b may be at least one stacked capacitor layer that passes communication signals incoming from the conductors 12. The capacitor layers 120a and 120b may be electrically connected to the electric shock protection unit 110 in parallel and may be formed on at least one of left and right sides of the electric shock protection unit 110, And a capacitor electrode.

The capacitor layers 120a and 120b provide additional capacitance of the electric shock protection unit 110 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 120a and 120b, The suppressor has the advantage of protecting against static electricity as well as increasing the sensitivity of RF reception.

At this time, the capacitor electrode may be formed in the same or similar shape as the internal electrode. For example, the capacitor electrode may be composed of conductive silicone rubber and conductive particles 134. [ The capacitor electrodes may be filled with the conductive silicone rubber and the conductive particles 134 in the plurality of sub-holes 143 formed in the holes 132.

The conductive particles 134 have a function of fixing the position of the conductive particles 134 in the respective sub-holes 143 of the conductive silicon, and the conductive particles 134 are formed in the conductive silicone rubber filled in the sub- In a regular or irregular manner.

At this time, when the external force or heat is not applied to the conductive particles 134, the conductive particles 134 are not energized and are not energized. When pressure or heat is externally applied, the conductive particles 134 contact each other due to contraction of the conductive silicone rubber, .

Such a capacitor electrode can realize electrical contact with the conductor 12 by the conductive particles 134, and contraction and expansion can be realized by the conductive silicone rubber. Therefore, the capacitor electrode can simultaneously provide electrical contact and elastic restoring force by pressurization.

For example, when the capacitor electrode is pressed by the conductor 12, the conductive silicone rubber is contracted, and the conductive particles 134 are brought into contact with each other, thereby electrically connecting the conductive particles 134 with 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, since the capacitor electrode is made of the same material as the body 101, the internal deformation can be reduced and therefore, the capacitor electrode can be used for a long period of time.

At this time, the contact portion 136 may be formed as a curved projection on one side of the capacitor electrode. This contact portion 136 can increase the contact area with the conductor 12 or the circuit board 14 by making a plurality of lines or surfaces contact with the conductor 12 or the circuit board 14. [ Therefore, the capacitor electrode can improve the conductivity of the communication signal.

The gap between the electric shock protection unit 110 and the capacitor layers 120a and 120b may be greater than the gap between the pair of internal electrodes of the electric shock protection unit 110. [ That is, it is desirable to secure a sufficient gap between the internal electrode and the capacitor electrode so that the static electricity or the leakage current flowing along the pair of internal electrodes does not leak to the adjacent capacitor electrode.

As described above, since the pair of internal electrodes and the capacitor electrode constituting the electric shock protection unit 110 and the capacitor layers 120a and 120b are constituted by the conductive silicone rubber and the conductive particles 114, 124 and 134, It is possible to simultaneously provide the function of the contactor for providing the elastic force in addition to the protection function for the electric shock.

That is, the contactor 100 for protecting an electric shock according to an embodiment of the present invention is configured to have an elastic force so that the electric shock protection device itself can provide an electric shock protection function and a contactor function at the same time.

As shown in FIGS. 2 to 4, the contactor 100 may have different functions depending on a leakage current due to an external power source, a static electricity flowing from the 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, (Or trigger voltage) Vbr is larger than the overvoltage due to the leakage current, the transistor 100 can be kept open. That is, since the breakdown voltage Vbr is larger than the rated voltage of the external power source of the portable electronic device, the electric shock protection unit 110 maintains the open state without being electrically connected to the electric conductor 12, such as a metal case, It is possible to prevent the leakage current from being transmitted.

At this time, the capacitor layers 120a and 120b 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, the capacitor layers 120a and 120b act as a large impedance to the frequency, .

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 operation voltage of the suppressor for electrostatic discharge is smaller than the instantaneous voltage of the static electricity, the electric shock protection unit 110 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 dielectric breakdown voltage Vcp of the capacitor layers 120a and 120b is larger than the breakdown voltage Vbr of the electric shock protection unit 110, the static electricity does not flow into the capacitor layers 120a and 120b , And may be passed only through the electric shock protection unit 110.

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 contactor 100 for protecting the electric shock protects the electric conductor 12 and the circuit part 14 'while the electric shock protection part 110 is kept open, but the capacitor layers 120a and 120b The communication signal can be passed. As such, the capacitor layers 120a and 120b may provide a path for the communication signal.

Here, the capacitances of the capacitor layers 120a and 120b are 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 shock protection contactor 100 can pass a communication signal flowing from the conductor 12 through the capacitor layers 120a and 120b with high capacitance without attenuation.

Here, the plurality of internal electrodes and the holes 112, 122 and 132 of the capacitor electrode formed in the contactor 100 for electric shock protection and the sub-holes 143 formed in the holes are formed as shown in FIGS. 7 and 8 And may be formed in various shapes.

Referring to FIG. 7, the sub-hole 701 has a rectangular shape, and the holes 112, 122, and 132 of the internal electrode and the capacitor electrode have a rectangular shape based on the plurality of sub- .

8, the sub-hole 801 has a hexagonal shape, and the holes 112, 122, and 132 of the internal electrode and the capacitor electrode are formed to have a geometric shape based on the plurality of sub-holes 801. [ .

As shown in FIGS. 7 and 8, the shapes of the holes 112, 122, and 132 to which two or more sub holes 701 and 801 are connected can be determined based on the shapes of the sub holes 701 and 807.

As described above, even when the partition walls 141 are formed using the same material when changing the shapes of the sub holes 701 and 801, depending on the shapes of the sub holes 701 and 801, the internal electrodes and the capacitor electrodes The overall structural strength may vary.

For example, when the contactor 100 for electric shock protection is pushed and pressed from the upper surface or the lower surface, the degree of squeezing is changed according to the shape of the sub holes 701 and 801 by drawing a curve like C or S shape will be.

The amounts of the conductive particles 114, 124, and 134 and the conductive silicone rubber filled in the sub holes 701 and 801 are determined depending on the shapes or the inner diameters of the sub holes 701 and 801, 701, and 801 in the longitudinal direction.

7 and 8, the cross-sectional shapes of the sub-holes 701 and 801 are described as rectangular and hexagonal, but the present invention is not limited thereto, and various shapes such as a triangle, a pentagon, a circle, and an ellipse .

9, the contactor 900 for an electric shock protection includes a body 901, an electric shock protection unit 910, and an electric shock protection contactor 900. The electric contactor 900 includes a pair of inner electrodes disposed on the same plane, And capacitor layers 120a and 120b. Here, the electric shock protection unit 910 may include a pair of internal electrodes and a gap 918.

The pair of inner electrodes may be disposed on the same plane. That is, the pair of inner electrodes may be arranged horizontally spaced apart from each other by a predetermined distance.

At this time, the gap 918 may be formed to have a height larger than the height of the pair of inner electrodes, and may be formed to have a width larger than the gap of the pair of inner electrodes. As described above, when the volume of the gap 218 is enlarged, even if fine particles are generated from the pair of internal electrodes upon discharging by static electricity, a space between the pair of internal electrodes is widened, Can be reduced.

These voids 918 may be formed by, for example, void forming members. That is, the gap forming member can be inserted between the pair of inner electrodes in the body 901. [

At this time, the gap 918 may be disposed between the pair of inner electrodes, and may include a layer of a discharge material applied to the inner wall with a predetermined thickness along the height direction.

The capacitor electrodes of the contactor 900 for electric shock protection and the holes 132 and 912 of the internal electrodes formed in the electric shock protection unit 910 may include at least one partition wall 941, And a plurality of sub-holes 943 may be formed in the holes 132 and 912. At this time, the barrier ribs 941 may be made of any one of acrylic, PC, PET, silicon, ceramic fiber, and metal mesh coated with an insulating material, but is not limited thereto. The barrier ribs 141 may be formed of the same or similar material as the body 101, and may be made of non-conductive silicone rubber, for example. The height of the barrier ribs 141 may be lower than or equal to the upper surface or the lower surface of the body 101. In this case, when the height of the entire partition wall 141 is lower than the upper or lower surface of the body 101, when the partition wall 141 is made of a material harder than the body 101, It is possible to prevent the elasticity of the internal electrode and the capacitor electrode from being reduced.

The contactor 100, 700, 800, 900 as described above may be disposed between the body-contactable conductor 12 and the circuit board 14 in a portable electronic device.

With this arrangement, the portable electronic device can be miniaturized without increasing the additional volume while minimizing damage due to external physical impact, while preventing damage to the user or damage to the internal circuit through the conductor.

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, 700, 800, 900: Contactor for protection against electric shock
101, 901: body 110, 910:
112, 122, 132: holes 114.124, 134: conductive particles
116, 126, 136: contacts 118, 218, 918:
120a, 120b: a capacitor layer

Claims

A contactor disposed between a conductor of the electronic device and a circuit board,
A body having at least one partition wall and a plurality of sub holes based on the at least one partition wall, the body having a plurality of holes made of a non-conductive silicone rubber;
An electric shock protection unit including at least a pair of inner electrodes disposed at a predetermined interval inside the body and a gap formed between the pair of inner electrodes;
At least one capacitor portion having a plurality of capacitor electrodes on at least one side of the electric shock protection portion; And
And a plurality of contact portions formed on the pair of inner electrodes and the plurality of capacitor electrodes on the upper and lower sides of the body in a curved shape,
Wherein the pair of inner electrodes and the plurality of capacitor electrodes are formed of the plurality of holes filled with conductive silicone rubber and conductive particles in the plurality of sub-
Wherein the electric shock protection portion 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 portion

The method according to claim 1,
Wherein the electric shock protection unit blocks 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,
Wherein the capacitor unit passes a communication signal flowing from the conductor.

The method according to claim 1,
Wherein the electric shock protection unit passes static electricity without causing insulation breakdown when static electricity flows from the electric conductor.

The method according to claim 1,
Wherein an interval between the capacitor portion and the electric shock protection portion is larger than an interval between the pair of internal electrodes of the electric shock protection portion.

The method according to claim 1,
Wherein the pair of internal electrodes are disposed such that at least a part thereof faces each other.

The method according to claim 1,
Wherein the pair of inner electrodes further comprises a conductive reinforcing material at a boundary portion with the gap.

The method according to claim 1,
And the pair of internal electrodes are disposed on the same plane.

9. The method of claim 8,
Wherein the gap is equal to or greater than the gap between the pair of inner electrodes and the height is greater than or equal to the thickness of the pair of inner electrodes.

9. The method of claim 8,
Wherein the gap is disposed in a vertical or horizontal direction about the internal electrode.

The method according to claim 1,
Wherein the gap comprises a layer of a discharge material applied to the inner wall at a predetermined thickness along the height direction.

12. The method of claim 11,
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 conductive particles comprise at least one of a planar particle and a spherical particle.

The method according to claim 1,
Wherein the conductive particles are made of a metal selected from gold, silver, iron, copper, zinc, chromium, nickel, cobalt, aluminum, and combinations thereof.

The method according to claim 1,
Wherein the barrier is made of at least one of acrylic, PC, PET, silicon, ceramic fibers having insulating properties, metal mesh coated with an insulating material, and non-conductive silicone rubber.

The method according to claim 1,
Wherein the subhole has at least one cross section of a triangle, a rectangle, a pentagon, a hexagon, a circle, and an ellipse.

17. The method of claim 16,
Wherein the shape of the hole is determined based on a shape in which the two or more sub-holes are connected.

Human contactable conductors;
A circuit board; And
And an electric shock protection contactor according to any one of claims 1 to 17, arranged between the electric conductor and the circuit board and electrically connected in series.

19. The method of claim 18,
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.