KR20170040635A - Circuit protection contactor and mobile electronic device with the same - Google Patents

Circuit protection contactor and mobile electronic device with the same Download PDF

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Publication number
KR20170040635A
KR20170040635A KR1020150139882A KR20150139882A KR20170040635A KR 20170040635 A KR20170040635 A KR 20170040635A KR 1020150139882 A KR1020150139882 A KR 1020150139882A KR 20150139882 A KR20150139882 A KR 20150139882A KR 20170040635 A KR20170040635 A KR 20170040635A
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KR
South Korea
Prior art keywords
electric shock
pair
shock protection
capacitor
electrodes
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KR1020150139882A
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Korean (ko)
Inventor
임병국
최윤석
황윤호
최재우
박규환
Original Assignee
주식회사 아모텍
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Priority to KR1020150139882A priority Critical patent/KR20170040635A/en
Publication of KR20170040635A publication Critical patent/KR20170040635A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/40—Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0254—High voltage adaptations; Electrical insulation details; Overvoltage or electrostatic discharge protection ; Arrangements for regulating voltages or for using plural voltages
    • H05K1/0257—Overvoltage protection
    • H05K1/0259—Electrostatic discharge [ESD] protection

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Elimination Of Static Electricity (AREA)

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, comprising: a body made of a non-conductive silicone rubber and having a plurality of vertically formed holes; 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 in a shape of a curved projection on the pair of inner electrodes and the plurality of capacitor electrodes on the upper side and the lower side of the body, wherein the pair of inner electrodes and the plurality of capacitor electrodes Conductive silicone rubber and conductive particles, and the electric shock protection portion has a breakdown voltage (Vbr) satisfying the following formula:
Vbr> Vin, Vcp> Vbr
Where Vin is the rated voltage of the external power supply of the electronic device,
Vcp is an insulation breakdown voltage of the capacitor portion.

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 parts are required, and therefore, an additional space is required on the circuit board of the portable electronic device, which adversely affects downsizing.

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.

In order to solve the above-described problems, the present invention provides an electric shock protection contactor disposed between a conductor of an electronic device and a circuit board. The contactor for protection against electric shock includes a body made of a non-conductive silicone rubber and provided with a plurality of vertically formed holes; 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 in a shape of a curved projection on the pair of inner electrodes and the plurality of capacitor electrodes on the upper side and the lower side of the body, wherein the pair of inner electrodes and the plurality of capacitor electrodes Conductive silicone rubber and conductive particles, and the electric shock protection portion has a breakdown voltage (Vbr) satisfying the following formula:

Vbr> Vin, Vcp> Vbr

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

Vcp is an insulation breakdown voltage of the capacitor portion.

According to a preferred embodiment of the present invention, the electric shock protection unit can block 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 being electrically insulated when the static electricity is introduced 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 thereof faces each other.

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

The pair of inner electrodes may be disposed 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 a vertical or horizontal direction about the internal electrode.

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.

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

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

On the other hand, the present invention relates to a human body contactable conductor; A circuit board; And an electric shock protection contactor disposed between the electric conductor and the circuit board and electrically connected in series. Here, the contactor for protection against electric shock includes a body made of a non-conductive silicone rubber and provided with a plurality of vertically formed holes; 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 in a shape of a curved projection on the pair of inner electrodes and the plurality of capacitor electrodes on the upper side and the lower side of the body, wherein the pair of inner electrodes and the plurality of capacitor electrodes Conductive silicone rubber and conductive particles, and the electric shock protection portion has a breakdown voltage (Vbr) satisfying the following formula:

Vbr> Vin, Vcp> Vbr

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

Vcp is 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,
7 is a cross-sectional view of another example of an electric shock protection contactor according to an embodiment of the present invention.

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

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

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. Such a pair of internal electrodes may be formed by filling the conductive silicon rubber and the conductive particles 114 together in the plurality of holes 112. Here, the conductive silicone rubber has a function of fixing the position of the conductive particles 114 in the hole 112, and the conductive particles 114 may be regularly or irregularly dispersed in the conductive silicone rubber have.

At this time, when the external force or heat is not applied to the conductive particles 114, the conductive particles 114 are not energized and are not energized. When pressure or heat is externally applied, the conductive particles 114 contact each other due to contraction of the conductive silicone rubber, .

These conductive particles 114 include at least one of a plate-like particle and a spherical particle, and may be made of a metal selected from gold, silver, iron, copper, zinc, chromium, nickel, cobalt, aluminum and combinations thereof.

Such a pair of inner electrodes can realize electrical contact with the conductor 12 by the conductive particles 114, 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.

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.

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 a gap 118 between a pair of internal electrodes without using a separate air gap 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 composed of conductive silicone rubber and conductive particles 124. Such a capacitor electrode may be formed by filling the conductive silicon rubber and the conductive particles 124 together in the plurality of holes 122. Here, the conductive silicone rubber has a function of fixing the position of the conductive particles 124 in the hole 122, and the conductive particles 124 may be regularly or irregularly dispersed in the conductive silicone rubber have.

At this time, when the external force or heat is not applied to the conductive particles 124, the conductive particles 124 are not energized and are not energized. When pressure or heat is externally applied, the conductive particles 124 contact each other due to shrinkage of the conductive silicone rubber, .

Such a capacitor electrode can realize electrical contact with the conductor 12 by the conductive particles 124, 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 124 are brought into electrical contact with each other by the conductive particles 124 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 126 may be formed as a curved projection on one side of the capacitor electrode. Such a contact portion 126 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 part 110 and the capacitor layers 120a and 120b are made of the conductive silicone rubber and the conductive particles 114 and 124, It is possible to simultaneously provide the function of the contactor that provides the elasticity against the electric shock protection function.

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.

7, the electric shock protection contactor 200 includes a pair of internal electrodes disposed on the same plane. The electric shock protection contactor 200 includes a body 201, an electric shock protection unit 210 ), And capacitor layers 120a and 120b. Here, the electric shock protection unit 210 may include a pair of internal electrodes and a gap 218.

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 218 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 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 201.

At this time, the gap 118 may be disposed between the pair of inner electrodes, and may include a layer of a discharge material applied on the inner wall with a predetermined thickness along the height direction.

The contactor 100 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 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, 200: Contactor for protection against electric shock 101: Body
110: electric shock protection part 112,122: hole
114.124: conductive particles 116, 126:
118, 218: Cavities 120a, 120b: Capacitor layer

Claims (16)

A contactor disposed between a conductor of the electronic device and a circuit board,
A body made of a non-conductive silicone rubber and provided with a plurality of vertically formed holes;
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 filled with conductive silicone rubber and conductive particles in the holes,
Wherein the electric shock protection unit has a breakdown voltage (Vbr) satisfying the following expression.
Vbr> Vin, Vcp> Vbr
Where Vin is the rated voltage of the external power supply of the electronic device,
Vcp is an insulation breakdown voltage of the capacitor 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 is configured to allow static electricity to pass therethrough without causing insulation breakdown when the static electricity is supplied 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 inner 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 include a conductive reinforcing material at a boundary portion with the gap. The method according to claim 1,
Wherein the pair of inner electrodes are disposed on the same plane. 9. The method of claim 8,
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. 9. The method of claim 8,
Wherein the gap is arranged 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 on the inner wall at a predetermined thickness along a 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. Human contactable conductors;
A circuit board; And
And an electric shock protection contactor disposed between the electric conductor and the circuit board and electrically connected in series,
The electric shock protection contactor includes:
A body made of a non-conductive silicone rubber and provided with a plurality of vertically formed holes;
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 filled with conductive silicone rubber and conductive particles in the holes,
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 16. The method of claim 15,
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.
KR1020150139882A 2015-10-05 2015-10-05 Circuit protection contactor and mobile electronic device with the same KR20170040635A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070109332A (en) 2006-05-10 2007-11-15 삼성전기주식회사 Built-in antenna assembly of wireless communication terminals

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070109332A (en) 2006-05-10 2007-11-15 삼성전기주식회사 Built-in antenna assembly of wireless communication terminals

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