KR20170068852A

KR20170068852A - internet of things device

Info

Publication number: KR20170068852A
Application number: KR1020150175825A
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

Objects Internet devices are provided. The object Internet apparatus according to an embodiment of the present invention includes a body member formed of a conductive material and installed in a fixed facility or an article to transmit surrounding information and a control signal, A circuit board on which at least one of at least one computing device, a sensing device, a passive device, and an active device is mounted in a complex manner and is mounted, and electrically connected to the circuit board and the body member; And a communication module for receiving the output value of the computing device or the sensing element of the circuit board by wire or wire and transmitting and receiving the information of the circuit board through a communication network, So that the static electricity is passed through the circuit board The leakage current of the external power source flowing from the ground is cut off.

Description

Internet of things device

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an object Internet device, and more particularly, to a object Internet device capable of protecting a user from a leakage current by a power source.

The Internet of Things (IoT) is a system for sharing information in daily life by connecting objects in life to wired and wireless networks. The Internet of things is the object space network that forms intelligent relationships such as sensing, networking, and information processing in a mutually cooperative manner without human intervention for three distributed environmental elements of human being, things and services.

Objects such as the Internet, which is a major component of the Internet, can include not only home appliances in wired and wireless networks, but also human, vehicles, bridges, various electronic devices, cultural properties, and physical objects constituting the natural environment. , And evolves into a concept that interacts with all the information of reality and the virtual world.

At this time, a variety of component elements are densely arranged inside the Internet device. In addition, the object Internet apparatus can be adopted as a metal housing to enhance the appearance or to protect the above-mentioned components.

However, since the metal housing is excellent in electrical conductivity due to the nature of the material, an electrical path can be formed between the housing and the built-in circuit depending on the specific device or depending on the location. Particularly, since the metal housing and the circuit part form a loop, when a static electricity having a high voltage instantaneously flows through a conductor such as a metal housing having a large exposed surface area, the circuit part such as an IC can be damaged, Measures are required.

On the other hand, such Internet devices are usually powered by an AC power source or a battery. In both cases, the external AC power is rectified to a DC power by a charger, an adapter, or an internal power conversion unit, and then converted to a low DC power suitable for the object Internet device through a transformer. 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 the non-genuine charger or the adapter, the DC power may not be sufficiently blocked by the Y-CAP. Further, leakage current may be generated by the AC power source, The current 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, such as a metal housing of an object Internet device. As a result, it can give a user an unpleasant feeling of crushing, and in a severe case, There is a fear of wearing.

Therefore, a method for protecting a user from such a leakage current is required for a thing Internet apparatus employing a metal housing.

Korea Patent Publication No. 2015-0125864

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide an object Internet device capable of protecting an internal circuit and / or a user from a leakage current caused by static electricity or an external power source.

According to an aspect of the present invention, there is provided an object Internet device installed in a fixed facility or an article to transmit surrounding information and control signals, the object device comprising: a body member formed of a conductive material; A circuit board installed in an inner space of the body member and being supplied with AC external power, and at least two of at least one computing device, a sensing device, a passive device, and an active device are combined and mounted; An electric shock protection device mounted on the circuit board so as to electrically connect the body member and the circuit board; And a communication module for receiving the output value of the computing device or the sensing device of the circuit board through wires or wires and transmitting and receiving information of the circuit board through a communication network.

The electric shock protection housing satisfies the following expression to allow the static electricity to pass without being broken down in insulation when the static electricity flows from the body member and to block the leakage current of the external power source flowing from the ground of the circuit board.

Vbr> Vin

Here, Vbr is the breakdown voltage of the electric shock protection element, and Vin is the rated voltage of the external power supply.

According to a preferred embodiment of the present invention, a power module is disposed inside the body member and electrically connected to the circuit board to supply power to the circuit board and the communication module. And a charging port formed at one side of the body member and coupled to a charging plug supplied with power for charging the power module.

Also, the circuit board may include at least one sensor unit for sensing a specific factor; A controller connected to the sensor unit to receive and process information collected by the sensor unit; And a signal generator connected to the controller and transmitting an operation signal to another external object according to the processed information.

In addition, the specific factor may include at least one of temperature, illuminance, sound, gas, and an input signal.

Also, the communication network may be a wide area network (WAN) or a local area network (LAN).

Also, the electric shock protection device may be interposed between the body member and the end portion of the circuit board.

The electric shock protection housing may include: a body having a plurality of sheet layers stacked; And an electric shock protection unit including at least one pair of inner electrodes spaced apart from each other at a predetermined interval in the inside of the body and a gap formed between the pair of inner electrodes.

In addition, the electric shock protection device may include at least one capacitor layer electrically connected in parallel to the electric shock protection part and passing a communication signal input from the electric conductor.

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.

The electric shock protection device may further include at least two varistor material layers alternately stacked with a first varistor material layer and a second varistor material layer, a plurality of second varistor material layers spaced apart at a predetermined interval (L1) And an electric shock protection unit including an internal electrode and a plurality of second internal electrodes spaced apart from each other by a predetermined distance L2 on the second varistor material layer.

The breakdown voltage Vbr may be a sum of unit breakdown voltages formed between the first internal electrode and the second internal electrode adjacent to each other.

The first internal electrode and the second internal electrode may be disposed so that at least a part of the first internal electrode and the second internal electrode overlap with each other.

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

The spacing distance between two first internal electrodes adjacent to each other in the plurality of first internal electrodes and the spacing distance between two second internal electrodes adjacent to each other in the plurality of second internal electrodes may be different from the spacing distance between the first internal electrode and the second internal electrode, 2 inner electrode.

Further, the electric shock protection device may satisfy the following expression.

Vcp> Vbr

Here, Vcp is the total breakdown voltage of the capacitor layer.

According to the present invention, since the body member such as the metal housing is exposed to the outside and the body member and the circuit board are connected to each other by the electric shock protection element, the user and the internal circuit are protected from leakage current and static electricity by the external electric power source can do.

FIG. 1 is a perspective view showing a thing Internet device according to an embodiment of the present invention, FIG.
FIG. 2 is a sectional view taken along the line II-II 'in FIG. 1,
FIG. 3 is a block diagram illustrating the Internet apparatus of FIG. 1;
FIG. 4 is a view illustrating an electric shock protection device included in a thing Internet device according to an embodiment of the present invention; FIG.
Fig. 5 is an exploded perspective view showing the electric shock protection element of Fig. 4,
FIG. 6 is a cross-sectional view taken along the line IV-IV 'of FIG. 4,
7 is a view showing an electric shock protection device according to a first modification,
8 is a view showing an electric shock protection device according to a second modification,
9 is a view showing an electric shock protection device according to a third modification,
FIG. 10 is an exploded perspective view showing the electric shock protection element of FIG. 9,
Fig. 11 is a cross-sectional view taken along line IX-IX 'of the electric shock protection element of Fig. 9,
12 is a view showing an electric shock protection device according to a fourth modification,
13 is a view showing an electric shock protection device according to a fifth modification,
Fig. 14 is an equivalent circuit diagram for explaining the operation of the electric shock protection device against leakage current,
FIG. 15 is an equivalent circuit diagram for explaining the operation of the electric shock protection element for electrostatic discharge (ESD)
16 is an equivalent circuit diagram for explaining the operation of the electric shock protection element with respect to the communication signal,
17 is a graph showing a simulation result of a pass frequency band according to a capacitance,
18 is an enlarged view of the pass frequency band in Fig.

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

The object Internet apparatus 100 according to an embodiment of the present invention is installed in a fixed facility or an article, and transmits surrounding information and control signals. The object Internet apparatus 100 includes a body member 110, a communication module 140, a circuit board 130, and an electric shock protection element 120, as shown in FIGS.

Here, the object Internet device 100 is an electronic device that can be connected by a network to share information, for example, a home appliance, an electronic device, a mobile device, a healthcare device, a remote meter reading device, a smart home device, A wearable computer or the like.

The body member 110 is formed of a conductive material. The material of the body member 110 may be made of a metal material. For example, the material of the body member 110 may be magnesium and stainless steel, but is not limited thereto. For example, it is also possible that the material of the body member 110 is a conductive plastic.

An internal space may be formed in the body member 110. The body member 110 may be fixed to a wall of an office or a house, but is not limited thereto. The body member 110 may be installed in a fixed facility or article.

The circuit board 130 is installed in the inner space of the body member 110. The circuit board 130 is supplied with AC external power. The circuit board 130 is at least one of at least one computing device, a sensing device, a passive device, and an active device.

The circuit board 130 may be electrically connected to the communication module 140 to process the information. The circuit board 130 for this purpose may include a sensor unit 132, a control unit 131, and a signal generating unit 133, for example.

The sensor unit 132 senses a specific factor. The sensor unit 132 may include at least one sensor. Here, the specific factors may include at least one of temperature, illumination, sound, gas, and an input signal, but the present invention is not limited thereto, Lt; RTI ID = 0.0 > of < / RTI > For example, the sensor unit 132 may include at least one of a temperature sensor, an illuminance sensor, a microphone, a gas sensor, and an infrared sensor. Here, the gas sensor may be, but is not limited to, a gas sensor that senses LNG (liquefied natural gas) or LPG (liquefied petroleum gas).

The operation of the sensor unit 132 will be described. For example, when the user speaks 'boiler power on' by voice, the sensor unit 132 can sense the user's voice. Alternatively, if the user operates the remote control to generate an input signal, the sensor unit 132 may sense the input signal. Also, the sensor unit 132 may be capable of sensing the temperature of the room.

The control unit 131 is connected to the sensor unit 132 to receive and process the information collected by the sensor unit 132. The control unit 131 may be configured to control the overall operation of the object Internet device 100. The controller 131 may be, for example, a microprocessor.

The signal generator 133 is connected to the controller 131. The signal generation unit 133 transmits an operation signal to another external object according to the information processed by the control unit 131. [ For example, when the control unit 131 determines that the power of the boiler 20 should be turned on, the signal generating unit 133 generates a power on signal. At this time, the communication module 140, which will be described later, can transmit the power-on signal generated by the signal generating unit 133 to another external object such as the boiler 20 through the communication network. The boiler 20 receives the power-on signal and performs the operation.

The communication module 140 receives the output value of the computing device or the sensing device of the circuit board 130 via wired / wireless communication, and transmits / receives the information of the circuit board 130 through the communication network. The communication module 140 receives information from outside through a communication network or transmits information to another external object. For example, the communication module 140 may receive a control signal from an external terminal. The communication module 140 may also be capable of transmitting control signals to another object, such as the boiler 20. [

The communication network for this may be, for example, a wide area network (WAN) or a local area network (LAN). For example, the communication network may be a wireless communication network such as Long Term Evolution (LTE), LTE-A or LTE-Advance, WiMAX, WiBro, Based wireless data services such as HSPA, HSUPA, HSDPA, WCDMA, 1xEVDO, GPRS, EDGE, and the like. Network or a wireless based network such as IEEE 802.11 b / g / n / ac.

(WiFi), 4G Long Term Evolution (LTE), small cell, etc., including Bluetooth, WiGig, ZigBee and 802.15.4 RF mesh, Communication technologies such as WAVE (Wireless Access for the Vehicular Environment) and DSRC (Dedicated Short-Range Communication), which are vehicle communication technologies, can also be utilized.

Or a low power low loss network (LLN) routing protocol or an IPv6 based 6LoWPAN (v6 over Low Power and Lossy Network), COAP (Constrained Application Protocol (COAP), Lightweight Protocol, Power Line Communication, PLC).

The structure of the communication module 140 may include a modem unit 141 and an antenna unit 142, for example.

The modem unit 141 performs a modulation for converting a digital signal into an analog signal and a demodulation function in the opposite case. The modem 141 may be mounted on a general communication device to perform modulation / demodulation, and thus a detailed description thereof will be omitted.

The antenna unit 142 emits an AC voltage modulated by a transmitter as an electromagnetic wave to the atmosphere when transmitting information and conversely converts an electromagnetic wave to an AC voltage evaluated by the receiver when receiving information. The communication module 140 may include one or more antenna portions 142.

The object Internet apparatus 100 includes a power supply module 150 and a charging port 160. The power supply module 150 includes a power supply module 150 and a charging port 160. [ can do.

The power module 150 may be positioned within the body member 110. The power module 150 may be electrically connected to the circuit board 130. The power module 150 may supply power to the circuit board 130 and the communication module 140.

The power module 150 may be, for example, a secondary battery. The secondary battery converts the chemical energy into electrical energy to supply power to an external circuit. When discharged, the battery is supplied with power from the outside, and converts electrical energy into chemical energy to store electricity.

The charging port 160 may be formed on one side of the body member 110. The charging plug 10 may be coupled to the charging port 160. [ The charging plug 10 may be supplied with power to charge the power module 150.

The charging port 160 may be electrically connected to the circuit board 130. When the charging plug 10 is coupled to the charging port 160, the power supplied from the charging plug 10 can be supplied to the power module 150 through the charging port 160.

The electric shock protection element 120 is mounted on the circuit board 130 so as to electrically connect the body member 110 and the circuit board 130. The electric shock protection device 120 may connect the body member 110 and the circuit board 130 in series.

The position where the electric shock protection device 120 is installed will be described in more detail. The electric shock protection device 120 may be positioned between the body member 110 and the end of the circuit board 130. For example, the electric shock protection device 120 may be disposed substantially in line with the circuit board 130. The electric shock protection element 120 may be positioned anywhere the circuit board 130 and the body member 110 are adjacent to each other.

Here, the electric shock protection device 120 may be configured to pass the static electricity without being destroyed by insulation when the static electricity flows from the body member 110, and may block the leakage current of the external electric power supplied from the ground of the circuit board 130 Can have a breakdown voltage (Vbr) satisfying the following equation (1).

Herein, Vin is the rated voltage of the external power supply of the object Internet apparatus 100.

At this time, the rated voltage may be a standard rated voltage for each country, and may be, for example, 100V, 110V, 120V, 220V or 240V, but is not limited thereto.

4 to 6, the structure of the electric shock protection device 120 may include a body 120a, an electric shock protection portion 125, and a plurality of capacitor layers 124a and 124b . The capacitor protection layer 125 includes a pair of internal electrodes 125a and 125b and a cavity 128. The capacitor layers 124a and 124b include a plurality of capacitor electrodes 126a and 126b .

The body 120a may include a plurality of sheets 125a, 125b, 126a, 126b provided on at least a part of one surface of the body 120 so as to constitute the electric shock protection device 120 and the capacitor layers 124a, 124b. The layers 120a-1 to 120b-11 are sequentially stacked, and a plurality of electrodes provided on one surface of the layers 120a-1 to 120b-11 are arranged to face each other, and then integrally formed through a pressing, firing or curing process.

Such a body 120a may be made of an insulator having a dielectric constant. For example, the insulator may be formed of any one of a ceramic material, a low temperature co-fired ceramic (LTCC), a high temperature co-fired ceramic (HTCC), and a magnetic material. At this time, the ceramic material may be a metal-based oxide compound, and the metal-based oxide compound may include at least one selected from Er2O3, Dy2O3, Ho2O3, V2O5, CoO, MoO3, SnO2, BaTiO3 and Nd2O3.

Each of the plurality of sheet layers 120a-1 to 120a-11 constituting the body 120a is electrically connected to the internal electrodes 125a and 125b and the capacitor layers 124a and 124b constituting the electric shock protection part 125 Any one of the capacitor electrodes 126a and 126b may be formed. For example, the upper sheet layers 120a-1 and 120a-4 to 120a-7 are formed such that the internal electrodes 125a and 125b and the capacitor electrodes 126a and 126b are formed on the lower surface of the corresponding sheet layer, The internal electrodes 125a and 125b and the capacitor electrodes 126a and 126b may be formed on the upper surface of the sheet layer 120a-2, 120a-3 and 120a-8 to 120a-11.

Here, the electric shock protection device 120 may include a plurality of the electric shock protection parts 125 and the capacitor layers 124a and 124b, respectively, such that the electric shock protection part 125 and the capacitor layers 124a and 124b are electrically connected in parallel. And a pair of external electrodes 121 and 123 electrically connected at both ends. The external electrodes 121 and 123 may be provided on both sides of the body 120a.

The external electrode 121 may be directly connected to the body member 110 on the circuit board 130 so that the electric shock protection device 120 is electrically connected to the body member 110 in series. .

The internal electrodes 125a and 125b are spaced apart from each other within the body 120a. The internal electrodes 125a and 125b may include at least one of Ag, Au, Pt, Pd, Ni, and Cu. The external electrodes 121 and 123 may include at least one of Ag, Ni, &Lt; / RTI >

The inner electrode 125a and the inner electrode 125b may be formed in the same pattern or may have different shapes and patterns. But may be provided to have different patterns. That is, the internal electrodes 125a and 125b are not limited to a specific pattern when the internal electrodes 125a and 125b are arranged so that the internal electrodes partially overlap each other when the body 120a is formed.

The intervals between the internal electrodes 125a and 125b and the areas facing each other or overlapping with each other may be configured to satisfy the breakdown voltage Vbr of the electric shock protection element 120, , 125b may be between 10 탆 and 100 탆.

The gap 128 may be formed by, for example, a gap forming member 127. That is, as shown in FIG. 15, each of the gap forming members 127 may be inserted between the pair of inner electrodes 125a and 125b in the body 120a. That is, the gap forming member 127 is provided in the sheet layer 120a-2 in the electric shock protection portion 125, and the gap between the internal electrode 125a and the internal electrode 125b in the sheet layer 120a-2 And can be exposed upward and downward.

At this time, the gap forming member 127 may include a plurality of discharge material layers 127a, 127b, and 127c that are applied to the inner wall of the gap forming member 127 to a predetermined thickness along the height direction. Here, the discharge material constituting the discharge material layers 127a, 127b, and 127c has a low dielectric constant, no conductivity, and no short circuit when an overvoltage is applied.

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

For example, when the internal electrodes 125a and 125b 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 insulation property to the discharge material and improves the resistance to static electricity, thereby solving the DC short phenomenon when the electric shock protection device 100 is mounted on the electronic part do.

Although the present invention has been described in the context of a SiC-ZnO-based material as an example of the discharge material, the present invention is not limited thereto. The discharge material may include a semiconductor material or metal particles corresponding to components of the internal electrodes 125a and 125b Nonconductive materials may be used

At this time, the discharge material layer applied to the inner wall of the gap forming member 127 includes a first portion 127a coated along the inner wall of the gap forming member 127 and a second portion 127b formed from the upper end of the first portion 127a A second portion 127b extending in contact with the electrode 125a and a third portion 127c extending from the lower end of the first portion 127a in contact with the internal electrode 125c .

The discharge material layers 127a, 127b and 127c are formed not only on the inner wall of the gap forming member 127 but also on the upper and lower ends of the gap forming member 127, The inner electrode 125a and the inner electrode 125c are extended to extend the contact area with the inner electrode 125a and the inner electrode 125c, respectively.

This is because some of the components of the discharge material layers 127a, 127b, and 127c are vaporized by the electrostatic spark due to the overvoltage, thereby enhancing the resistance to static electricity even if some of the discharge material layers 127a, 127b, and 127c are damaged. So that the discharge material layers 127a, 127b, and 127c can perform their functions.

On the other hand, the above-described electric shock protection element 120 may satisfy the following expression (2).

Here, Vcp may be the total breakdown voltage of the capacitor layer. The total breakdown voltage of the capacitor layer is such that the capacitor layers 124a and 124b are comprised of a plurality of layers and each is electrically connected in parallel so that the insulation between the ends of each capacitor formed by the capacitor electrodes 126a and 126b It may be equal to the breakdown voltage.

7, the electric shock protection device 220 according to the first modification differs from the electric shock protection device 120 (see FIG. 4) described above by the gap formation member 127, A gap 128 may be formed between the electrodes 125a and 125b. The static electricity introduced from the outside by the gap 128 can be discharged between the pair of the internal electrodes 125a and 125b. At this time, the electrical resistance between the pair of inner electrodes 125a and 125b is lowered, and the voltage difference between both ends of the protection connector 200 can be reduced to a certain value or less. Therefore, the electric shock protection element 120 can pass static electricity without causing internal insulation breakdown.

On the other hand, a plurality of void forming members 127 may be provided between the pair of inner electrodes 125a and 125b. As described above, when the number of the gap forming members 127 disposed between the pair of inner electrodes is increased, the discharge path of the static electricity is increased, so that resistance to static electricity can be increased.

The capacitor layers 124a and 124b may be at least one capacitor layer for passing communication signals from the conductors 12. The capacitor layers 124a and 124b may be electrically connected in parallel to the electric shock protection unit 125 through the external electrodes 121 and 123. For example, Or both of the upper and lower capacitor electrodes 126a and 126b.

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

Unlike the prior art in which a separate component for increasing the RF reception sensitivity is used together with a suppressor, a varistor or a zener diode for protecting the internal circuit against static electricity by the capacitor layers 124a and 124b, 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 125 and the capacitor layers 124a and 124b is preferably larger than the gap between the internal electrodes 125a and 125b or the gap between the capacitor electrodes 126a and 126b . That is, the capacitive layers 124a and 124b may be formed so that static electricity or leakage current flowing along the internal electrodes 125a and 125b is not leaked to the adjacent capacitor electrodes 126a and 126b, It is desirable to secure a sufficient distance between the capacitor electrodes 126a and 126b and the internal electrodes 125a and 125b.

Here, the sheet layer on which the electric shock protection part 125 and the upper and lower capacitor layers 124a and 124b are formed may be made of the same material, but may be made of different materials.

Further, at least one of the plurality of sheet layers 120a-4 to 120a-11 constituting the capacitor layers 124a and 124b is formed of a first ceramic material, and the remaining sheet layer is formed of a 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.

8, the electric shock protection device 320 according to the second modification differs from the electric shock protection device 220 (see FIG. 7) described above in that the internal electrodes 125a 'and 125b 'May be spaced apart from each other and may be formed in the form of a through hole in the gap 129' formed between the internal electrodes.

That is, the through holes are disposed between a pair of internal electrodes 125a 'and 125b' arranged parallel to each other on the same sheet layer, and may be provided in a hollow shape so that air can be filled.

At this time, the electric shock protection device 120 may include a discharge material layer on the sidewall of the gap. Such a discharge material layer may be applied to the inner wall of the through hole formed in the sheet layer 120a-2 with a certain thickness along the height direction. In addition, a filler made of a discharge material may be disposed in the through hole formed in the sheet layer 120a-2.

9 to 11, the electric shock protection device 420 according to the third modification differs from the electric shock protection device 120 (see FIG. 4) described above in that the capacitor layers 224a and 224b are removed Structure. That is, the electric shock protection device according to the third modification does not include the capacitor layers 224a and 224b, and may include the electric shock protection part 125. [ Since the electric shock protection unit 125 has been described above, a detailed description thereof will be omitted.

12, the electric shock protection device 520 includes an electric shock protection unit 525 and the capacitor layers 524a and 524b. The electric shock protection unit 520 includes a plurality of capacitors, . The capacitor protection layer 525 includes varistor material layers 520a-1 and 520a-2 and internal electrodes 525a and 525b. The capacitor layers 524a and 524b include a plurality of capacitor electrodes 526a , 526b.

Each of the plurality of sheet layers 520a-1 to 520a-11 is formed of a plurality of sheet layers 520a-1 to 520a-11, Any one of the capacitor electrodes 526a and 526b constituting the internal electrodes 525a and 525b and the capacitor layers 524a and 524b may be formed. For example, in the intermediate sheet layers 520a-1 to 520a-2, the internal electrodes 525a and 525b are formed on the upper surface of the sheet layer, and the upper sheet layers 220a-4 to 220a- The capacitor electrodes 526a and 526b may be formed on the upper surface of the sheet layer and the lower sheet layers 220a-8 to 220a-11 may be formed on the upper surface of the sheet layer by the capacitor electrodes 526a and 526b .

The shielding protection element 520 may be formed on the shielding protection portion 525 and the capacitor layers 524a and 524b such that the shielding portion 525 and the capacitor layers 524a and 524b are electrically connected to each other. And a pair of external electrodes 521 and 523 electrically connected at both ends. The external electrodes 521 and 523 may be provided on both sides of the plurality of sheet layers 520a-1 to 520a-11.

At this time, the varistor material layer may include at least two layers, in which the first varistor material layer 520a-1 and the second varistor material layer 520a-2 alternately. Here, the first varistor material layer 520a-1 and the second varistor material layer 520a-2 may be made of a semiconductive material containing at least one of ZnO, SrTiO3, BaTiO3, and SiC, It can be either. In addition, it is preferable that the varistor material layer is set so that the particle size of the varistor material can satisfy the breakdown voltage (Vbr).

The internal electrodes 525a and 525b are electrically connected to a plurality of first internal electrodes 525a and a second varistor material layer 520a-2 on the first varistor material layer 520a-1, And a plurality of second internal electrodes 525b spaced apart from each other by a predetermined distance L2.

Here, the breakdown voltage Vbr of the electric shock protection element 520 may be the sum of the unit breakdown voltages formed between the first adjacent first internal electrode 525a and the second internal electrode 525b. In other words, the breakdown voltage Vbr of the electric shock protection element 520 is determined by the unit breakdown voltage formed between the first internal electrode 525a and the second internal electrode 525b, and the first internal electrode 525a and the number of the second internal electrodes 525b.

At this time, each of the first internal electrode 525a and the second internal electrode 525b may be arranged so that at least a part thereof does not overlap. That is, each of the first internal electrode 525a and the second internal electrode 525b may be disposed so that at least a part of the first internal electrode 525a and the second internal electrode 525b are overlapped with each other or may be crossed with each other so as not to overlap with each other.

Here, the number of the first internal electrode 525a and the second internal electrode 525b may be determined to satisfy the breakdown voltage Vbr of the electric shock protection element 520 according to the unit breakdown voltage formed therebetween. In FIG. 43, the number of unit elements formed by the first internal electrode 525a and the second internal electrode 525b is four. However, the present invention is not limited thereto. have.

At this time, the electric shock protection unit 525 may include a plurality of unit elements formed by the first internal electrode 525a and the second internal electrode 525b in parallel. That is, the electric shock protection unit 525 includes a first varistor material layer 520a-1 formed with the first internal electrode 525a and a second varistor material layer 520a-2 formed with the second internal electrode 525b alternately As shown in FIG.

On the other hand, the first internal electrode or the second internal electrode does not leak static electricity or leakage current to the adjacent positions of the internal electrodes 525a and 525b, but is spaced apart so that it can normally proceed between the internal electrodes 525a and 525b .

For example, the spacing L1 between the two first internal electrodes 525a adjacent to each other in the plurality of first internal electrodes 525a and the distance L2 between the two first internal electrodes 525a adjacent to each other in the plurality of second internal electrodes 525b, The spacing distance L2 between the internal electrodes 525b may be greater than the shortest distance d1 between the first internal electrode 525a and the second internal electrode 525b.

The first internal electrode or the second internal electrode does not leak static electricity or leakage current into the adjacent capacitor electrodes 526a and 526b of the internal electrodes 525a and 525b but is normally leaked between the internal electrodes 525a and 525b It is preferable that the interval is set so that it can proceed.

The gap between the capacitor protection layer 525 and the capacitor layers 524a and 524b is preferably larger than the gap between the internal electrodes 525a and 525b or the gap between the capacitor electrodes 526a and 526b . That is, the capacitor layers 524a and 524b are formed so as to prevent the static electricity or leakage current flowing along the internal electrodes 525a and 525b from leaking to the adjacent capacitor electrodes 526a and 526b, It is desirable to secure a sufficient distance between the capacitor electrodes 526a and 526b and the internal electrodes 525a and 525b.

The capacitor layers 524a and 524b may be at least one capacitor layer for passing communication signals. The capacitor layers 524a and 524b may be electrically connected in parallel with the electric shock protection portion, for example, on the upper or lower portion of the electric shock protection portion, and may include the capacitor electrodes 526a and 526b.

Here, the plurality of sheet layers 520a-3 to 520a-11 forming the capacitor layers 524a and 524b may be made of an insulator having a dielectric constant, for example, a ceramic material. At this time, the ceramic material may be a metal-based oxide compound, and the metal-based oxide compound may include at least one selected from Er2O3, Dy2O3, Ho2O3, V2O5, CoO, MoO3, SnO2 and BaTiO3. Meanwhile, the upper capacitor layer 524a and the lower capacitor layer 524b may be made of the same material, but may alternatively be made of dissimilar materials.

13, the electric shock protection device 620 according to the fifth modification may have a structure in which the above-described capacitor layers 524a and 524b (see FIG. 12) are removed. That is, the electric shock protection device according to the fifth modified example does not include the capacitor layers 524a and 524b (see FIG. 12), and may include the electric shock protection portion 525. Since the electric shock protection unit 525 has been described above, a detailed description thereof will be omitted.

Although not shown in the drawing, the electric shock protection housing may include a plurality of electric shock protection portions 525. At this time, the plurality of electric shock protection parts 525 may be stacked in the vertical direction.

On the other hand, the fact that the electric shock protection device 120 (see FIG. 1) having the above-described structure has different functions according to the leakage current by the external power source, the static electricity flowing from the body member 110 (see FIG. 1) Can be confirmed with reference to FIGS. 14 to 18. FIG.

14, when the leakage current of the external power source flows into the body member 110 through the ground formed on the circuit board 130, the electric shock protection element 120 generates a breakdown voltage (or a trigger voltage) (Vbr) is larger than the overvoltage due to the leakage current, it can be kept open.

That is, since the breakdown voltage Vbr is larger than the rated voltage of the external power source of the object Internet apparatus, the electric shock protection element 120 maintains the open state without being electrically conducted, The leakage current can be prevented from being transmitted to the member 110.

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 electric shock protection device 120 can protect the user from electric shock by blocking the leakage current from external power input from the ground of the circuit board 130.

As shown in FIG. 15, when static electricity flows from the outside through the body member 110, the electric shock protection element 120 functions as an electrostatic protection element such as a suppressor or a varistor. That is, when the electric shock protection element 120 is a prepressor, since the operating voltage of the suppressor for electrostatic discharge is smaller than the instantaneous voltage of the static electricity, the static electricity can be passed by the instantaneous discharge. In the case of the varistor, Since the breakdown voltage (Vbr) is smaller than the instantaneous voltage of the static electricity, it can be electrically conducted to pass the static electricity.

As a result, when the static electricity is supplied from the body member 110, the electric shock protection element 120 has a low electrical resistance, so that the static electricity can pass therethrough without being electrically broken down.

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

Here, the circuit board 130 may have a separate protection element (not shown) for bypassing the static electricity to the ground. As a result, the electric shock protection element 120 can pass the static electricity without being damaged by the static electricity flowing from the body member 110, thereby protecting the inner circuit of the rear end.

As shown in FIG. 16, when the electric shock protection element 120 has a capacitor layer and a communication signal is input through the body member 110, the electric shock protection element 120 functions as a capacitor. That is, since the electric shock protection layer is kept in the open state, the electric shock protection element 120 blocks the body member 110 and the circuit board 130, 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. 17 and Fig. 18, according to the simulation result of the pass frequency band according to the capacitance, substantially no loss is transmitted in the mobile wireless communication frequency band (700MHz to 2.6GHz) And exhibits a short-circuit phenomenon electrically.

However, as shown in Fig. 18, it can be seen that the influence of the reception sensitivity is small in the case of a capacitance of about 30 pF or more. As a result, the capacitance of the capacitor layer It is preferable to use a high capacitance of 30. Or more.

As a result, the electric shock protection element 120 can pass the communication signal flowing from the body member 110 without a reduction by the high capacitance of the capacitor layer.

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.

100: object Internet device 110: body member
120, 220, 320, 420, 520, 620:
120a: body 121, 123: external electrode
124a, 124b: capacitor layer 125: electric shock protection part
125a, 125b: internal electrodes 127a, 127b, 127c: discharge material layer
128: air gap 130: circuit board
140: Communication module 150: Power module
160: Charging port

Claims

An object Internet device installed in a fixed facility or an article and transmitting surrounding information and control signals,
A body member formed of a conductive material;
A circuit board installed in an inner space of the body member and being supplied with AC external power, and at least two of at least one computing device, a sensing device, a passive device, and an active device are combined and mounted;
An electric shock protection device mounted on the circuit board so as to electrically connect the body member and the circuit board; And
And a communication module for receiving the output value of the computing device or the sensing device of the circuit board through wires or wires and transmitting and receiving the information of the circuit board through a communication network,
Wherein the electric shock protection device satisfies the following equation so that the electrostatic protection device can prevent the leakage current of the external power source flowing from the ground of the circuit board after passing the static electricity without being insulated and broken when the static electricity flows from the body member.
Vbr> Vin
Here, Vbr is the breakdown voltage of the electric shock protection element, and Vin is the rated voltage of the external power supply.

The method according to claim 1,
A power module positioned within the body member and electrically connected to the circuit board to supply power to the circuit board and the communication module; And
And a charging port formed at one side of the body member and coupled to a charging plug supplied with power for charging the power module.

The method according to claim 1,
The circuit board includes:
At least one sensor unit for sensing a specific factor;
A controller connected to the sensor unit to receive and process information collected by the sensor unit; And
And a signal generator connected to the control unit and transmitting an operation signal to another external object according to the processed information.

The method according to claim 1,
Wherein the specific factor comprises at least one of temperature, illuminance, sound, gas, and an input signal.

The method according to claim 1,
Wherein the communication network is a wide area network (WAN) or a local area network (LAN).

The method according to claim 1,
Wherein the electric shock protection device is interposed between the body member and the end of the circuit board.

The method according to claim 1,
The electric shock protection housing,
A body formed by stacking a plurality of sheet layers; And
And an electric shock protection unit including at least a pair of inner electrodes spaced apart from each other at a predetermined interval in the inside of the body and a gap formed between the pair of inner electrodes.

8. The method of claim 7,
The electric shock protection housing,
And at least one capacitor layer electrically connected in parallel with the electric shock protection section and passing communication signals incoming from the electric conductor.

8. The method of claim 7,
Wherein the pair of inner electrodes are disposed on the same sheet layer.

8. The method of claim 7,
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.

8. The method of claim 7,
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,
The electric shock protection housing,
At least two varistor material layers alternately laminated with a first varistor material layer and a second varistor material layer, a plurality of first inner electrodes spaced a predetermined distance (L1) on the first varistor material layer, And a plurality of second internal electrodes spaced apart by a predetermined distance (L2) on the varistor material layer.

14. The method of claim 13,
The electric shock protection housing,
And at least one capacitor layer electrically connected in parallel with the electric shock protection section and passing communication signals incoming from the electric conductor.

14. The method of claim 13,
Wherein the breakdown voltage (Vbr) is a sum of a unit breakdown voltage formed between the first internal electrode and the second internal electrode adjacent to each other.

14. The method of claim 13,
Wherein the first internal electrode and the second internal electrode are disposed so that at least a part thereof overlaps with each other.

14. The method of claim 13,
Wherein the first internal electrode and the second internal electrode are disposed so that at least a part thereof does not overlap each other.

14. The method of claim 13,
Wherein a spacing distance between two first internal electrodes adjacent to each other in the plurality of first internal electrodes and a spacing distance between two second internal electrodes adjacent to each other in the plurality of second internal electrodes are different from each other between the first internal electrode and the second internal electrode Objects that are larger than the shortest distance between the electrodes.

15. The method according to claim 8 or 14,
Wherein the electric shock protection device satisfies the following expression.
Vcp> Vbr
Where Vcp is the total breakdown voltage of the capacitor layer.