KR20170127762A - Functional contactor and mobile electronic apparatus with the same - Google Patents

Abstract

Provided are a functional contactor capable of simultaneously performing functions of a functional element and a contactor by applying elastic force to the functional element, and a portable electronic apparatus having the same. The functional contactor according to an embodiment of the present invention comprises: a dielectric layer made of a dielectric; an elastic layer laminated on the dielectric layer and having elastic force; a first electrode disposed on an upper side of the elastic layer; and a second electrode disposed below the dielectric layer.

Description

TECHNICAL FIELD The present invention relates to a functional contactor and a portable electronic device having the functional contactor.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contactor for an electronic device such as a smart phone, and more particularly, to a functional contactor capable of implementing an ESD protection function or an electric shock prevention function and a capacitor function, and a portable electronic device having the same .

In recent portable electronic devices, there is an increasing tendency to adopt a metal housing to improve esthetics and robustness. Such a portable electronic device alleviates an impact from the outside and simultaneously penetrates into the portable electronic device or reduces the electromagnetic waves leaked from the portable electronic device and provides an external housing and a portable electronic device for electrical contact between the antenna disposed in the external housing and the internal circuit board. A conductive gasket or a conductive contactor is used between the internal circuit boards of the electronic device.

However, since the electrical path can be formed between the external housing and the internal circuit board by the conductive gasket or the conductive contactor, when static electricity having an instantaneous high voltage flows through a conductor such as an external metal housing, The static electricity may flow into the internal circuit board through the conductive gasket or the conductive contactor to damage the circuit such as the IC and the leakage current generated by the AC power may propagate to the external housing along the ground portion of the circuit, In extreme cases, it may cause an electric shock which may cause injury to the user.

In addition, when the metal housing is used as an antenna, the conductive gasket or the conductive contactor has a low capacitance, so that the signal is attenuated and transmission of the RF signal is not smooth, so that it is necessary to realize a high capacitance. A protective element for protecting the user from such static electricity or leakage current is provided together with a conductive gasket or a conductive contactor for connecting the metal housing and the circuit board, There is a need for a functional contactor having various functions for protecting a circuit in a portable electronic device or for smoothly transmitting a communication signal.

Moreover, when the functional device and the contactor are integrated, the two parts must be electrically arranged in series, so that the problem of increasing the volume in the thickness or the longitudinal direction has been encountered. At this time, it is necessary to separately check whether the electrical connection according to the combination of the two parts is stable.

Therefore, there is an urgent need to develop a technology for realizing a contactor function by providing an elastic force to the functional device itself without providing a separate contactor.

KR 2007-0109332A (Released Nov. 15, 2007)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a functional contactor capable of simultaneously performing functions of a functional device and a contactor by applying an elastic force to the functional device itself and a portable electronic device having the functional contactor. have.

In order to solve the above problems, the present invention provides a dielectric layer comprising a dielectric; An elastic layer laminated on the dielectric layer and having an elastic force; A first electrode disposed on the elastic layer; And a second electrode disposed below the dielectric layer.

According to a preferred embodiment of the present invention, the dielectric layer may be formed of at least one of a varistor material, polyimide, and ceramic.

The elastic layer may be made of polyethylene or silicone rubber.

In addition, the first electrode and the second electrode may be formed by conductive plate printing.

Meanwhile, the present invention provides a contactor for connecting an external conductor and a built-in conductor of an electronic device, comprising: a dielectric layer made of a dielectric; And an elastic layer having an elastic force disposed on the upper side or the lower side of the dielectric layer.

According to another aspect of the present invention, there is provided a plasma display panel comprising: a first electrode and a second electrode; And a base layer disposed between the first electrode and the second electrode, the base layer being made of a material having an elastic force and a dielectric constant.

According to a preferred embodiment of the present invention, the base layer may be formed by mixing a first material having elasticity and a second material having a dielectric constant.

The base layer may be formed by breaking a sheet of a first material having elasticity and a sheet of a second material having a dielectric constant.

The base layer may be formed by mixing a dielectric material with an elastic material and mixing the material.

Meanwhile, the present invention provides a human body contactable external conductor; A built-in conductor mounted on or electrically connected to a circuit board; And a functional contactor as described above connecting between the external conductor and the internal conductor.

According to a preferred embodiment of the present invention, the built-in conductor is any one of a component mounting pad of a circuit board, a conductive pad of an expandable flexible circuit board, a conductive bracket connected to the circuit board, and a shield can .

The functional contactor may be coupled to the external conductor or the internal conductor through a conductive adhesive layer.

In addition, the functional contactor may be mounted on the circuit board through solder.

According to the present invention, by providing the functional element integrally with the elastic material, the functions of the functional element and the contactor can be provided at the same time, so that the miniaturization can be achieved without increasing the total volume, Can be minimized.

Further, the present invention can provide elasticity and permittivity by using the same base layer by mixing an elastic material and a dielectric material to form a single base layer. Therefore, compared to the case where the two materials are separated, Can be guaranteed.

Further, by using a conductor in an electronic device as an electrode, the present invention can omit at least one electrode of the functional contactor, thereby reducing manufacturing cost and saving resources for manufacturing the contactor.

1 is a sectional view of an example in which a functional contactor according to an embodiment of the present invention is applied to a portable electronic device;
FIG. 2 is a sectional view showing an example of a functional contactor according to an embodiment of the present invention,
3 is a sectional view showing another example of the functional contactor according to an embodiment of the present invention,
4 is a cross-sectional view illustrating another example of a functional contactor according to an embodiment of the present invention,
5 is a cross-sectional view illustrating another example of a functional 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.

1 and 2, the functional contactor 100 according to an embodiment of the present invention includes a first electrode 101, a second electrode 102, an elastic layer 110, and a dielectric layer 120 ).

Such a functional contactor 100 is for electrically connecting between an outer conductor 12 such as a metal case and a built-in conductor 14 such as a circuit board or a conductive bracket in a portable electronic device.

At this time, the functional contactor 100 is contracted to the opposite side according to the pressing force for coupling the external conductor 12 to the portable electronic device, and when the external conductor 12 is detached from the portable electronic device, So that it can be restored to its original state.

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.

At this time, the external conductor 12 may be provided, for example, to partially surround or partially surround the sides of the portable electronic device, and may be an antenna for communication between the portable electronic device and an external device.

In addition, the built-in conductor 14 may be any one of a component mounting pad of a circuit board, a conductive pad of a flexible circuit board for expansion, a conductive bracket connected to the circuit board, and a shield can mounted on the circuit board. Here, the flexible circuit board for expansion is a conductive medium which is not used for mounting components but is used for extension of some signals such as a ground expansion.

At this time, the functional contactor 100 may be coupled to any one of the external conductor 12 and the internal conductor 14 through a conductive adhesive layer. For example, the dielectric layer 120 is coupled to the external conductor 12 or the internal conductor 14, and the elastic layer 110 is electrically connected to the opposite side of the functional contactor 100, Can be contacted.

Here, when the functional contactor 100 is coupled to the outer conductor 12, the outer conductor 12 is connected to the inner surface, that is, the surface facing the embedded conductor 14, with the functional contactor 100 ) Can be formed.

As described above, by joining the functional contactor 100 through the conductive adhesive layer with the groove portion in the external conductor 12, the coupling can be performed by soldering at a position where connection with the circuit board is not easy, It is possible to apply to a difficult position and thus the degree of freedom of design can be improved.

As a result, manufacturing cost can be reduced by omitting a separate medium such as FPCB that can be mounted by soldering, and electric characteristics can be improved by eliminating the performance degradation factor due to deterioration of the medium.

In addition, when the functional contactor 100 is mounted on a circuit board, the functional contactor 100 can be coupled through solder. At this time, the functional contactor 100 may be mounted on a circuit board by an SMT soldering process.

The first electrode 101 is disposed on the upper side of the elastic layer 110. The first electrode 101 may be formed of a conductive plate, for example, a copper plate. At this time, the first electrode 101 may be provided on the elastic layer 110 by printing.

The first electrode 101 is electrically contacted to the built-in conductor 14 or the external conductor 12 to which the functional contactor 100 is not directly coupled.

The second electrode 102 is disposed below the dielectric layer 120. The second electrode 102 may be formed of a conductive plate, for example, a copper plate. At this time, the second electrode 102 may be provided under the dielectric layer 120 by printing.

The second electrode 102 is coupled to the external conductor 12 and the internal conductor 14 through a conductive adhesive layer. Here, the conductive adhesive layer may be a conductive adhesive film.

1 and 2, the second electrode 102 disposed on the lower surface of the dielectric layer 120 is coupled to the embedded conductor 14, and the first electrode 101 (not shown) disposed on the elastic layer 110 Are shown and described as being in electrical contact with the outer conductor 12, but are not so limited.

For example, the second electrode 102 disposed on the lower surface of the dielectric layer 120 is coupled to the external conductor 12, and the first electrode 101 disposed on the elastic layer 110 is connected to the external conductor 12, And can be electrically contacted to the built-in conductor 14.

The first electrode 101 disposed on the elastic layer 110 is coupled to the external conductor 12 or the internal conductor 14 and the second electrode 101 disposed on the lower surface of the dielectric layer 120, The electrode 102 may be electrically contacted to the outer conductor 12 or the inner conductor 14. [

The elastic layer 110 is laminated on the dielectric layer 120 and has an elastic force. The elastic layer 110 may be made of polyethylene or silicone rubber. Here, the silicone rubber may be a nonconductive silicone rubber.

At this time, when the functional contactor 100 is electrically contacted to the external conductor 12, the elastic layer 110 may be contracted toward the internal conductor 14 by the pressing force of the external conductor 12 When the external conductor 12 is detached, it can be restored to its original state by its elastic force.

The dielectric layer 120 is made of a dielectric material and is electrically connected to the elastic layer 110 in series. At this time, the dielectric layer 120 may be laminated on the elastic layer 110 through the conductive adhesive layer, but the present invention is not limited thereto.

The dielectric layer 120 may include at least one of a varistor material, a polyimide, and a ceramic.

Here, the varistor material may be either a nonlinear semiconductor material containing at least one of ZnO, SrTiO3, BaTiO3, and SiC, or a Pr and Bi-based material.

Further, the ceramic is Er ₂ O _3, Dy ₂ O _3, Ho ₂ O _3, V ₂ O _5, CoO, MoO _3, SnO _2, BaTiO _3, and Nd ₂ O metal-containing _three or more of the selected one kinds An oxide compound, or a ferrite, and a sintered ceramic such as a low temperature co-fired ceramic (LTCC) or a high temperature co-fired ceramic (HTCC) may be used.

The functional contactor 100 may block the leakage current of the external power source flowing from the ground of the circuit board to the external conductor 12. To this end, the functional contactor 100 may be configured such that its internal pressure is greater than the rated voltage of the external power supply of the electronic device. Here, the rated voltage may be a standard rated voltage for each country, for example, 240V, 110V, 220V, 120V, and 100V.

When the external conductor 12 has an antenna function, the functional contactor 100 functions as a capacitor by the first electrode 121 and the second electrode 122, so that the leakage current of the external power source is cut off It is possible to pass a communication signal coming from a conductor or a circuit board.

In addition, the functional device 120 can pass the electrostatic discharge (ESD) flowing from the conductive case 11 without being broken. At this time, the functional contactor 100 can pass the electrostatic discharge (ESD) through the gap between the first electrode 101 and the second electrode 102 without dielectric breakdown. Such an electrostatic discharge (ESD) is configured to be transmitted to the ground portion of the circuit board, thereby protecting the internal circuit.

Therefore, the functional contactor 100 electrically connects and connects the external conductor 12 and the built-in conductor 14 with respect to a communication signal, an electrostatic discharge (ESD), or the like, Can be prevented from being transmitted to the external conductor (12).

Since the functional layer including the first electrode 101, the second electrode 102 and the dielectric layer 120 integrally includes the elastic layer 110 made of an elastic material, It is possible to reduce the size of the functional contactor 100 without increasing the total volume of the functional contactor 100 and to constitute a single element between the pair of electrodes. Can be minimized.

Meanwhile, the functional contactor according to the embodiment of the present invention may have no electrode or only one electrode, and the external conductor 12 or the internal conductor 14 may be used as a corresponding electrode.

3, the functional contactor 100 'connects between the external conductor 12 and the shield can 15. The functional contactor 100' may include a dielectric layer 120, Only the elastic layer 130 is included.

At this time, the external conductor 12 and the shield can 15 function as electrodes of the functional contactor 100 '. Here, the functional contactor 100 'may be coupled to any one of the external conductor 12 and the internal conductor 14 through a conductive adhesive layer.

For example, the functional contactor 100 'may include the dielectric layer 120 coupled to the shield can 15, and the elastic layer 110 may be in electrical contact with the outer conductor 12. Conversely, the functional contactor 100 'may be constructed such that the dielectric layer 120 is coupled to the outer conductor 12 and the elastic layer 110 is electrically contacted to the shield can 15, to be.

In the present embodiment, the functional contactor 100 'is shown and described as being coupled to the shield can 15, but it is not limited thereto and may be applied to a component mounting pad of a circuit board or a conductive bracket connected to the circuit board Can be combined.

Although the functional contactor 100 'is shown as not having all the electrodes in the present embodiment, the functional contactor 100' is not limited thereto, and may be formed only on one side of the dielectric layer 120 and the elastic layer 110 An electrode can be formed.

For example, by providing the electrode below the dielectric layer 120, the functional contactor 100 'can be coupled to the component mounting pad of the circuit board through SMT soldering, thereby providing a stable connection structure .

In addition, an electrode may be provided between the elastic layer 110 and the dielectric layer 120. In this case, the elastic layer 110 and the dielectric layer 120 can be formed on the basis of the electrode, and thus the bonding force of the functional contactor 100 'can be improved.

Thus, by using a conductor such as an outer case or a shield can in the portable electronic device as the electrode of the functional contactor, at least one electrode of the functional contactor 100 can be omitted, At the same time, resources for manufacturing the contactor can be saved.

Meanwhile, the functional contactor according to the embodiment of the present invention is composed of one base layer without separately stacking the elastic layer and the dielectric layer.

4 and 5, the functional contactor 200, 200 'includes a first electrode 101, a second electrode 102, and a substrate layer 210, 220.

The base layers 210 and 220 are disposed between the first electrode 101 and the second electrode 102 and are made of a material having elasticity and permittivity.

For example, the substrate layer 210 may be formed by mixing a first material having elasticity and a second material having a dielectric constant (see FIG. 4). That is, the base layer 210 may be formed as a single layer by chemically mixing two materials each having an elastic force and a dielectric constant.

Alternatively, the substrate layer 220 may be made by breaking a sheet of a first material having an elastic force and a sheet of a second material having a dielectric constant (see FIG. 5). Here, the braking means that the sheets are divided into pieces of a predetermined size or smaller. In particular, the second material may be made of a self-bending material for binding at uneven surfaces or curvature regions.

That is, the base layer 220 may be formed as a single layer by physically mixing two materials each having an elastic force and a dielectric constant. At this time, the base layer 220 may include bindings for binding of the first and second materials that are broken.

In addition, the substrate layer 220 may be formed by mixing a dielectric material with an elastic material and mixing the material. Optionally, the elastic body may be formed by mixing Ag / Cu powder and dielectric material in silicon, thereby making it possible to control the capacitance while being conductive.

As described above, by using one base layer formed by chemically or physically mixing the elastic material and the dielectric material, the elastic force and the dielectric constant can be simultaneously provided to the same base layer. Therefore, compared with the case where the two materials are divided, It is possible to ensure the stability of the electrical connection of the terminals themselves.

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: external conductor 14: circuit board
15: shield can 101,201: first electrode
102, 202: second electrode 110: elastic layer
120: dielectric layer 210,220: substrate layer

Claims (17)

A dielectric layer made of a dielectric;
An elastic layer laminated on the dielectric layer and having an elastic force;
A first electrode disposed on the elastic layer; And
And a second electrode disposed below the dielectric layer. The method according to claim 1,
Wherein the dielectric layer comprises at least one of a varistor material, polyimide, and ceramic. The method according to claim 1,
Wherein the elastic layer is made of polyethylene or silicone rubber. The method according to claim 1,
Wherein the first electrode and the second electrode comprise a conductive plate printing. A contactor for connecting an outer conductor and a built-in conductor of an electronic device,
A dielectric layer made of a dielectric; And
And an elastic layer having an elastic force disposed on the upper side or the lower side of the dielectric layer. 6. The method of claim 5,
Wherein the dielectric layer comprises at least one of a varistor material, polyimide, and ceramic. The method according to claim 6,
Wherein the elastic layer is made of polyethylene or silicone rubber. A first electrode and a second electrode; And
And a base layer disposed between the first electrode and the second electrode and made of a material having an elastic force and a dielectric constant. 9. The method of claim 8,
Wherein the base layer is made by mixing a first material having elasticity and a second material having a dielectric constant. 9. The method of claim 8,
Wherein the base layer is made by breaking a sheet of a first material having an elastic force and a sheet of a second material having a dielectric constant. 11. The method according to claim 9 or 10,
Wherein the first material is made of polyethylene or silicone rubber. 11. The method according to claim 9 or 10,
Wherein the second material comprises at least one of a varistor material, polyimide, and ceramic. 9. The method of claim 8,
Wherein the substrate layer is formed by mixing a dielectric material with an elastic material and mixing the material. Human-accessible exterior conductors;
A built-in conductor mounted on or electrically connected to a circuit board; And
A portable electronic device comprising the functional contactor according to any one of claims 1 to 13 connecting between the external conductor and the internal conductor. 15. The method of claim 14,
Wherein the built-in conductor is any one of a component mounting pad of a circuit board, a conductive pad of a flexible circuit board for expansion, a conductive bracket connected to the circuit board, and a shield can mounted on the circuit board. 15. The method of claim 14,
Wherein the functional contactor is coupled to either the exterior conductor or the internal conductor through a conductive adhesive layer. 15. The method of claim 14,
Wherein the functional contactor is mounted to the circuit board via solder.

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