KR101516297B1 - Tact switch for electronic component - Google Patents

Abstract

The present invention relates to a tact switch for electronic components. The invention includes: an upper pattern and a lower pattern, which are composed of a plate-type conductor with certain thickness; an insulation panel placed between the upper pattern and lower pattern, which is composed of the insulator; and a dome switch which is put on the top of the upper pattern. The upper pattern has a circle-shaped electrode part in the middle. The electrode is projected from the middle of the upper pattern by corroding the edge through etching. A pair of end points corresponding to the circular surface of the electrode part is connected to each other, and a first electrode and a second electrode with different polarities are formed symmetrically around the connection of the end points. The end points on the circled surface of the electrode part are connected by corrosion done through etching. The connection is an insulation part to electrically insulate the first electrode and the second electrode. The insulation part is expanded to a first electrode area and a second electrode area from a virtual diameter line, connecting the end points on the electrode part, while entering the first and second electrode areas alternately, and has a winding shape with multiple curves. The first and second electrodes, which are expanded successively in the direction facing each other by the insulation part, provide an interlocked-shape expansion part which is coupled around the insulation part.

Description

{TACT SWITCH FOR ELECTRONIC COMPONENT}

The present invention relates to a tact switch for electronic parts capable of surface mounting (SMT) on a circuit board. More particularly, the present invention relates to a tact switch for electronic parts, which has a high button contact rate and is easy to assemble, .

As known, the tact switches for electronic parts perform opening and closing operations of the circuit by light contact, and are a typical switch used for various modern electronic products since the opening and closing operation of the circuit is accurate and easy and the structure is simple .

In recent years, tact switches are mainly used for portable communication devices such as cellular phones with a trend toward miniaturization, and various miniaturized laptops, portable cassettes, MP3s and the like, which are becoming more and more advanced and miniaturized. The tact switch is also a PCB type tact with a small weight, Switches are being developed.

According to the prior art, a tact switch for electronic parts capable of surface mounting (SMT) on a circuit board is registered as Korean Patent No. 10-1208261, and the technical structure of the tact switch for electronic parts introduced in this patent is as follows .

FIG. 1 is an exploded perspective view of the tact switch, FIG. 1b is an assembled sectional view of FIG. 1a, and FIG. 1c is an assembled external perspective view of FIG. 1a.

The tact switch includes a flat pattern assembly 100 having a predetermined thickness and a dome switch 120 (hereinafter, referred to as 'metal dome') mounted on the top of the pattern assembly. The assembly 100 comprises a first electrode pattern 102 and a second electrode pattern 103 symmetrically with respect to the insulating portion 101 across the center, 102) 103 are provided with electrode terminals 102a, 103a at both ends thereof. The first electrode pattern 102 to which power is supplied from the first electrode terminal 102a and the second electrode pattern 103 to which power is supplied from the second electrode terminal 103a have different polarities.

The first electrode pattern 102 and the second electrode pattern 103 can be simultaneously connected to the pattern assembly 100 around the insulating portion 101 when the metal dome 120 is pressed. The insulating part 101 across the center of the pattern assembly 100 is formed in the vicinity of the center of the pattern assembly 100 where the first electrode pattern 102 and the second electrode pattern 103 meet, ), Which are curved in a zigzag shape in the left and right direction.

1B, an insulating film 160 and a dome guide 110 are sequentially placed between the pattern assembly 100 and the metal dome 120. First, An insulating film 160 covering the pattern 102 and the second electrode pattern 103 is attached. The insulating film 160 has a through hole 161 at the center and the through hole 161 has a smaller diameter than the diameter of the metal dome 120 and is preferably wound in the left- And at least partially surround the intricately curved intermediate portion.

When the metal dome 120 is mounted on the insulating film 160 in this way, the peripheral edge of the metal dome 120 is positioned outside the through hole 161 to maintain the insulation state, The first electrode and the second electrode are electrically connected to each other when the metal dome 120 is pressed. A lower cover film 130 is attached to the lower portion of the pattern assembly 100 and an upper cover film 140 is attached to the upper portion of the pattern assembly 100. The upper part of the metal dome 120, that is, the upper part of the metal dome 120 to which the upper cover film 140 is attached, has improved contact with the metal dome 120 when the button key of the electronic part is pressed, A protruding boss 150 is attached to increase the button connection rate and improve the click rate or click sensitivity.

However, in the structure of the tact switch as described above, the first electrode pattern and the second electrode pattern are formed in the same plane, and the first electrode pattern and the second electrode pattern are formed in a meandering curved middle portion, Even if the protruding boss is added to the upper part of the dome, it is practically difficult to completely solve the defective contact (defective energization).

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned problems of the prior art, and it is an object of the present invention to provide an electronic component which is easy to assemble and which facilitates pressing operation of a metal dome when a button key of an electronic component is pressed, And to provide an airtight / watertight electronic tact switch in which contact failure is remarkably reduced and a click rate and a click feeling are improved.

According to the above-described problems, the present invention provides an insulation panel comprising an upper pattern and a lower pattern each of which is made of a plate-shaped conductor having a predetermined thickness to be energized, an insulator which is located between the upper pattern and the lower pattern, Wherein the upper portion of the upper pattern has a circular electrode portion at the center thereof and the electrode portion is protruded from the center of the upper pattern by etching the peripheral portion thereof through etching, Wherein a first electrode and a second electrode having opposite polarities with respect to each other are formed symmetrically with respect to each other at a pair of end points of the circular surface of the electrode portion, A pair of end points are connected by etching through etching, and the connection is made by electrically connecting the first electrode and the second electrode Wherein the insulating portion alternately enters a region of the first electrode and a region of the second electrode from a virtual diameter line connecting both end points of the circular surface of the electrode portion, The first electrode and the second electrode are sequentially extended in a direction opposite to each other by the insulating portion so that the first electrode and the second electrode sequentially extend in the direction of the second electrode, Each of the first and second electrodes has an extension extending in a curved shape between the first electrode and the second electrode so that both ends of the insulation portion extend outside the electrode portion, And the lower pattern extends between the through holes formed vertically on the imaginary longitudinal center line, The first electrode and the second electrode are disposed in a vertically opposed manner with respect to the insulating portion, and electrode terminals having polarities different from each other are provided at corresponding ends of the first electrode and the second electrode, And the first electrode and the second electrode of the lower pattern are different in polarity by the terminal.

According to the present invention, the first electrode and the second electrode of the upper pattern have at least one through hole on each side symmetrically symmetrical with respect to the insulating portion, and the through holes are formed on the first electrode and the second electrode formed on the second electrode The through holes formed in the first and second electrodes of the upper pattern and the first and second electrodes of the lower pattern are formed to be mutually opposed on a virtual longitudinal center line of the upper pattern and the lower pattern, Whereby the upper pattern is provided such that both ends of the insulating portion are offset to one side of each through hole and the first and second electrodes are inclined obliquely with respect to the imaginary center line as a whole.

Further, the tactile switch for electronic parts of the present invention includes a step film positioned between the upper pattern and the metal dome to provide a predetermined step between the metal dome and the upper pattern, a step film having a predetermined thickness around the metal dome, A guide film which is mounted on the upper part of the film to guide the mounting of the metal dome and which is formed with a hole of a predetermined diameter capable of receiving the metal dome in the center thereof to prevent the metal dome from coming off, A lower cover film covering the lower portion of the tact switch, and a lower cover film covering the upper surface of the metal dome and having a predetermined thickness Wherein the protruding boss has a protruding boss which protrudes from a lower portion of the upper cover film when assembling the tact switch, Wherein the metal dome is formed of a material which is seated around a passing hole of the step film and is elastically warped when an electronic part button key is clicked, so that when the electronic dome is mounted on the upper pattern, That is, the first electrode and the second electrode.

According to the present invention, the electrode terminals are provided in a rounded shape along a rounded cutout formed at a longitudinally corresponding end of the lower pattern, and the electrode terminals are provided in a round shape corresponding to each cutout formed at the longitudinally- The rounded cutouts are also formed in the longitudinally corresponding ends of the pattern, the upper and lower cover films, and the guide film, and the step film, or the electrode terminals protrude outwardly at the longitudinally corresponding ends of the lower pattern, A portion having the same shape as that of the electrode terminals protrudes and extends outward in the longitudinal direction corresponding ends of the upper pattern and the insulating panel corresponding to the electrode terminals formed at the longitudinally corresponding ends of the lower pattern, Can be provided.

According to the above-described constitution, the tact switch for electronic parts of the present invention improves the waterproof property and the airtightness, so that it is possible to prevent a contact failure or a short circuit due to foreign substances, thereby increasing the contact ratio of the electronic component button Can be increased. In addition, when the button key of the electronic component is pressed, the contact property between the button key and the dome switch is improved, so that the contact ratio or conduction rate of the electronic component can be increased, and the pressing operation of the dome switch is smoothly performed. And click feeling is improved.

1 is a view showing an example of a conventional tact switch for an electronic part,
FIG. 2 is an exploded perspective view showing the components according to the first embodiment of the tact switch for an electronic part of the present invention,
Figure 3 is a partially assembled state perspective view of the components shown in Figure 2;
Fig. 4 is a sectional view taken along the line I-I in Fig. 3a and Fig. 3b,
FIG. 5 is a sectional view taken along the line I'-I 'of FIG. 3A and the line II'-II' of FIG. 3B,
6 is an exploded perspective view showing components of a tact switch for an electronic part according to a second embodiment of the present invention,
7 is a partially assembled state perspective view of the components shown in FIG. 6,
8 is a cross-sectional view taken along line III-III in FIG. 7A and line IV-IV in FIG. 7B,
9 is a cross-sectional view taken along line III'-III 'of FIG. 7A and line IV'-IV' of FIG. 7B.

Best Mode for Carrying Out the Invention Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

In the following description, the same or similar elements are denoted by the same reference numerals throughout the specification and the detailed description thereof will be repeated. It will be omitted.

Embodiment 1

2 to 5 show the components of the tact switch for an electronic part according to the first embodiment of the present invention and the combination thereof. In the tact switch for an electronic part in this embodiment, An upper pattern 200 made of a plate-shaped conductor having a predetermined thickness as much as possible and a lower pattern 220 made of a plate-shaped conductor having a predetermined thickness capable of conducting electricity, an insulator (not shown) disposed between the upper pattern and the lower pattern, And a dome switch 240 (hereinafter, referred to as 'metal dome') mounted on the upper portion of the upper pattern.

2, the upper pattern 200 has a circular electrode portion 210 at the center. The electrode portion 210 is etched by etching the peripheral portion of the electrode portion 210, A portion 210 is provided in a protruding form.

 The electrode unit 210 is composed of a first electrode 211 and a second electrode 212, which have arbitrary corresponding end points of a circular surface connected to each other and symmetrically symmetrical with respect to each other and having different polarities from each other. The connecting portions formed in this way are provided as an insulating portion 213 for electrically insulating the first and second electrodes 211 and 212 from each other. do.

The insulating portion 213 is provided in a form that alternately enters the region of the first electrode 211 and the region of the second electrode 212 from a virtual diameter line connecting both end points of the circular surface of the electrode portion 210 The insulating portion 213 extends substantially in the direction of the first electrode 211 and the second electrode 212 and has a substantially curved shape bent at least a plurality of times. In this case, the first electrode 211 and the second electrode 212 have extension portions 211a and 212a that sequentially extend in mutually opposing directions by the insulating portion 213, 211a and 212a are fitted to each other with the insulating portion 213 as a center. The insulating part 213 which is curved between the first electrode 211 and the second electrode 212 has its both ends protruded from the outside of the electrode part 210, Surface.

When the metal dome 240 is pressed down by clicking the button of the electronic part, the shape of the upper pattern 200 as described above is changed by the first electrode 211 and the second electrode 211, which are mutually connected by the metal dome 240, The number of contact points or the connection area of the electrode 212 is increased to improve the electrical connection rate and reduce the connection failure.

The first electrode 211 and the second electrode 212 of the upper pattern 200 have at least one through hole 211b and 212b on one side thereof symmetrical with respect to the insulating portion 213, The first and second electrodes 211b and 212b are in communication with the through holes 221b and 222b of the first and second electrodes 221 and 222 of the lower pattern 220 described below. The through holes 211b and 212b formed in the first electrode 221 and the second electrode 222 of the first electrode 211 and the second electrode 212 and the lower pattern 220 of the upper pattern 200 221b and 222b are preferably formed to face each other on the imaginary longitudinal center line of the upper pattern 200 and the lower pattern 220. In the case of the upper pattern 200, The first and second electrodes 221 and 222 are inclined obliquely with respect to the imaginary center line as a whole because the first and second electrodes 221 and 222 are shifted to one side of each of the through holes 211b and 212b.

The lower pattern 220 has an insulating portion 223 formed between the through holes 221b and 222b formed vertically spaced apart from each other on an imaginary longitudinal center line. The first electrode 221 and the second electrode 222 are arranged in a vertically opposed manner. The insulating portion 223 can be formed by a method of etching through etching as in the case of the upper pattern 200 described above. Electrode terminals 221a and 222a having polarities different from each other are respectively provided at corresponding ends of the first electrode 221 and the second electrode 222. The electrode terminals 221a and 222a form a lower pattern 220 The first electrode 221 and the second electrode 222 have different polarities.

In this embodiment, the electrode terminals 221a and 222a are formed at the longitudinally corresponding ends of the lower pattern 220, respectively, and may be provided in a rounded shape along the cut-out portion formed at the corresponding ends. In this case, the upper pattern 200, the upper and lower cover films 270 and 280, the guide film 260, and the step film (not shown) corresponding to the respective cutouts formed at the longitudinally corresponding ends of the lower pattern 220 250 are preferably formed in the form of rounded cutouts at the longitudinally corresponding ends.

The upper pattern 200 and the lower pattern 220 may be formed by stacking the first and second electrodes 211 and 221 and the second electrode 212 with the insulating panel 230 made of a non- The circuit board 222 is vertically and electrically connected through the through holes 211b and 221b and the through holes 211b and 222b to form a circuit pattern. The first electrodes 211 and 221 have the same polarity and the second electrodes 212 and 222 have the same polarity through the first and second electrodes 221 and 222b.

The electrode terminal 221a provided on the first electrode 221 of the lower pattern 220 is connected to the positive power source and the electrode terminal 221a provided on the second electrode 222 of the lower pattern 220, Terminal 222a is connected to the negative (-) power source, and will be mainly described. In this case, the first electrode 221 becomes a positive electrode, and the second electrode 222 becomes a negative electrode.

The metal dome 240 is made of a material that can be elastically warped when an electronic component button is clicked. When the metal dome 240 is mounted on the upper pattern 200, the convex upper portion thereof contacts the electrode portion 210 at the center of the upper pattern 200, The first electrode 211 and the second electrode 212 may be formed to cover both the first electrode 211 and the second electrode 212.

According to the present embodiment, in addition to the pattern assembly and the metal dome 240 constituted by the upper pattern 200, the lower pattern 220 and the insulating panel 230, the upper pattern 200 and the metal dome 240, A guide film 260 guiding the installation of the metal dome 240 and covering the periphery of the guide dome 240, and an upper cover film 250 covering the upper portion of the tact switch of the present invention, And a lower cover film 280 covering a lower portion of the tact switch of the present invention.

The stepped film 250 is for providing a predetermined step between the metal dome 240 and the upper pattern 200 and the metal dome 240 is formed around the through hole 251 formed in the center of the step film 250 And the metal dome 240 mounted on the surface of the step film 250 is pressed by the external force so that its convex upper portion passes through the through hole 251 of the step film 250 to be separated from the upper film 200 The first electrode 211 and the second electrode 212 are connected to each other. The step film 250 improves the click rate or click feeling of the metal dome 240 and prevents the friction between the metal dome 240 and the upper pattern 200 to prolong the life of the tact switch.

The guide film 260 is placed on the upper surface of the step film 250 with a predetermined thickness around the metal dome 240 and guides the mounting of the metal dome 240 to the center of the guide film 260, It is preferable that a protective hole 261 having a predetermined diameter capable of accommodating the metal dome 240 is perforated. The guide film 260 may be formed of a metal plate or a film having a predetermined thickness.

The upper cover film 270 and the lower cover film 280 cover the upper and lower portions of the tact switch for electronic parts of the present invention, Moisture and moisture penetrating through the plurality of through holes 221b and 222b are blocked from the lower part of the lower pattern 220 to which the lower cover film 280 is attached, So that a reliable waterproof effect can be realized.

In this embodiment, the upper pattern 200 and the lower pattern 220 are preferably made of metal or non-metallic sheet-like members that are conductive. In addition, when the guide film 260 including the upper cover film 270, the lower cover film 280, and the step film 250 is also made of a film material, it is preferable that the film is composed of an electrical insulating material, Materials such as a usual PI film or a capton film may be used. Of course, in the case of the lower cover film 280, the lower cover film 280 may be formed on the lower pattern 220 by a method such as screen printing.

In addition, the tact switch of the present invention may further include a protruding boss 290 positioned above the metal dome 240. The protruding boss 290 has a predetermined thickness. The protruding boss 290 has a predetermined thickness, and after the tact switch is assembled, the protruding boss 290 is provided with an electronic When you press a button key of a part, the button connection rate and click feeling are improved. When the tact switch 290 is assembled, the protruding boss 290 may be positioned below the upper cover film 270 as shown in FIG. 3A. Alternatively, as shown in FIG. 3B, As shown in FIG.

Particularly, when the protruding bosses 290 are positioned between the upper cover film 270 and the metal dome 240, a predetermined space can be formed therebetween so that the elasticity of the metal dome 240 can be exerted The operation of the metal dome 240 is still smoothly performed by pressing the button key of the electronic part so that the protruding boss 290 is positioned at the upper part of the upper cover film 270 and provides a good click rate or click feeling can do.

The assembly of the tact switches for electronic parts of the present invention including the components described above can be made by an optional combination of these components depending on the purpose of use. This will be described in detail as follows.

FIG. 3 is a partially assembled state perspective view of the components shown in FIG. 2, FIG. 4 is a sectional view taken along the line I-I of FIG. 3a and FIG. 3b, 'And a sectional view taken along the line II'-II' in FIG. 3B.

3 to 5, the upper and lower patterns 200 and 220 are integrally joined to each other with the insulating panel 230 interposed therebetween. The upper pattern 200 and the lower pattern 220 are electrically connected through the through holes 211b and 221b between the first electrodes 211 and 221 and the second electrode 212 and 222 are electrically connected through the through holes 211b and 221b, And are electrically connected through the through holes 212b and 222b. The stepped film 250 is attached to the surface of the upper pattern 200 surrounding the electrode part 210 and the metal dome 240 is mounted on the upper surface of the stepped film 250.

The metal dome 240 is electrically connected to the first and second electrodes 211 and 212 of the upper pattern 200 through the through hole 251 of the step film 250 and the first and second electrodes 211 and 212 of the upper pattern 200, And simultaneously covers the respective through holes 211b and 212b of the electrode. When the electronic component button key is clicked, the metal dome 240 is elastically warped and its convex upper portion passes through the through hole 251 of the step film 250 to the first electrode 211 of the upper pattern 200, The first electrode 211 and the second electrode 212 are electrically connected to each other through the first electrode 211 and the second electrode 212, respectively.

The tact switch for electronic parts according to the present invention assembled in this way improves the contact property between the button key and the metal dome when the button key of the electronic part is pressed, thereby increasing the contact ratio or energization ratio of the electronic component, Click and click rates can also get better. In addition, the tact switch for electronic parts of the present invention has high dustproofing and waterproofing properties, and when the metal dome is pushed down by clicking the electronic component button key, the first and second electrodes of the upper pattern interconnected by the metal dome, The number of contact points or the contact area of the contacts increases, thereby improving the electrical connection rate and reducing the connection failure.

Embodiment 2

6 to 9 show the components of the tact switch for an electronic part according to the second embodiment of the present invention and their combination forms. In the case of this embodiment, as in the case of the first embodiment An upper pattern 200 'made of a plate-shaped conductor having a predetermined thickness capable of conducting current, a lower pattern 220' made of a plate-shaped conductor having a predetermined thickness capable of conducting current, And a dome switch 240 (hereinafter referred to as a 'metal dome') mounted on the upper portion of the upper pattern.

The difference from the first embodiment of the second embodiment can be said to be substantially the shape of the upper pattern 200 ', the lower pattern 220', and the insulating panel 230 '.

6, the lower pattern 220 'has an insulating portion 223 formed between the through holes 221b and 222b, which are vertically spaced apart from each other on an imaginary longitudinal center line. The insulating portion 223 The first electrode 221 and the second electrode 222 are vertically opposed to each other. Electrode terminals 221a and 222a having polarities different from each other are provided at corresponding ends of the first electrode 221 and the second electrode 222. The electrode terminals 221a and 222a are connected to the lower pattern 220 ' In the outward direction. In this case, the electrode terminals 221a and 222a are formed in the lengthwise corresponding ends of the upper pattern 200 'and the insulating panel 230' corresponding to the electrode terminals 221a and 222a of the lower pattern 220 ' It is preferable that a portion having the same shape as that of FIG. Other structures of the upper pattern 200 ', the lower pattern 220', and the insulating panel 230 'are substantially the same as those of the first embodiment. The difference from Embodiment 1 in the case of the step film 250 ', the guide film 260', and the upper cover film 270 'is that the rounded cuts formed at the longitudinally corresponding end are all removed and the lower pattern 220 The electrode terminals 221a and 222a of the upper panel 200 'and the corresponding portions of the upper panel 200' and the insulating panel 230 'are exposed to the outside. In addition, in the case of the lower cover film 280 ', each of the electrode terminals 221a and 222a of the lower pattern 220' has a recessed portion exposed to be connectable to the terminal pattern printed on the PCB will be.

Also in this embodiment, the tact switch may further include a protruding boss 290 positioned above the metal dome 240. As shown in FIG. 7A, when the tact switch is assembled, the protruding boss 290 is formed in the lower part of the upper cover film 270 'so as to increase the contact between the button key (not shown) of the electronic part and the metal dome 240. Or may be configured to be positioned above the upper cover film 270 'as shown in FIG. 7B.

Fig. 7 is a partially assembled state perspective view of the components shown in Fig. 6, Fig. 8 is a sectional view taken along line III-III in Fig. 7A and line IV- The upper and lower patterns 200 'and 220' are integrally formed with each other with the insulating panel 230 'sandwiched therebetween, and the upper and lower patterns 200' and 220 ' And the first and second electrodes 211 and 212 'of the upper pattern 200' are electrically connected to each other by electrical connection between the upper pattern 200 'and the lower pattern 220' ) Is substantially the same as that of the first embodiment described above.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the following claims.

200: upper pattern
210:
211: first electrode
212: second electrode
213:
211a, 212a:
211b, 212b, 221b, 222b:
220: Lower pattern
221: first electrode
222: second electrode
221a, 222a: electrode terminal
223:
230: Insulation panel
240: Dome switch
250: step film
251: Through ball
260: guide film
261: Protective ball
270: upper cover film
280: Lower cover film
290: protruding boss

Claims (7)

An upper panel and an upper panel, each of which is made of a plate-shaped conductor having a predetermined thickness for allowing current to flow therethrough; an insulating panel made of an insulator not passing through electricity and positioned between the upper and lower patterns; Wherein the upper pattern has a circular electrode portion at the center,
Wherein the electrode portion is formed by protruding to the center of the upper pattern by etching the peripheral portion thereof by etching, and a corresponding pair of end points of the circular surface of the electrode portion are connected to each other, The first electrode and the second electrode are formed to be laterally symmetrical,
Wherein the connection is an insulating portion for electrically insulating the first electrode and the second electrode, and both ends of the insulating portion extend to the outside of the electrode portion, that is, the surface of the etched upper pattern. The method according to claim 1,
And a pair of end points of the circular surface of the electrode portion are connected by etching through etching, and the insulating portion is formed from a virtual diameter line connecting both end points of the circular surface of the electrode portion, Wherein each of the tact switches has a shape that alternately enters the region of the second electrode and extends in the direction of the first electrode and the second electrode and is bent at least a plurality of turns. 3. The method of claim 2,
Wherein the first electrode and the second electrode each include an extension portion that sequentially extends in mutually opposite directions by the insulating portion and has an extending portion having a shape such that it is fitted and engaged with each other with the insulating portion as a center, switch. The method according to claim 1,
The lower pattern has an insulating portion formed between the through holes formed vertically spaced apart from each other on a virtual longitudinal center line. The first electrode and the second electrode are disposed to face each other with the insulating portion being a center, And the first electrode and the second electrode of the lower pattern have different polarities from each other by the electrode terminals. The electronic device according to claim 1, switch. The method according to claim 2 or 4,
The first electrode and the second electrode of the upper pattern have at least one through hole symmetrically symmetrical with respect to the insulating portion. The through holes are formed in the respective through holes formed in the first electrode and the second electrode of the lower pattern, And the through holes formed in the first and second electrodes of the upper pattern and the first and second electrodes of the lower pattern are formed to face each other on a virtual longitudinal center line of the upper pattern and the lower pattern, Wherein the upper pattern has a shape in which both end portions of the insulating portion are offset to one side of each through hole and the first and second electrodes are inclined obliquely with respect to the imaginary center line as a whole. 6. The method of claim 5,
A stepped film positioned between the upper pattern and the metal dome to provide a predetermined step between the metal dome and the upper pattern, a stepped film having a predetermined thickness around the metal dome and being mounted on the upper side of the stepped film, And a cover film which covers the upper portion of the tact switch, a cover film which covers the upper portion of the tact switch, And a protruding boss having a predetermined thickness positioned above the metal dome to provide a good click-through rate or click feeling while increasing the contact between the button key and the metal dome of the electronic component, Is disposed at the lower or upper portion of the upper cover film when assembling the tact switch, And the convex upper portion of the convex upper portion of the first pattern is located on the electrode portion of the upper pattern, that is, the first electrode and the second electrode And the electrodes are provided so as to cover all of the electrodes. 5. The method of claim 4,
Wherein the electrode terminals are provided in a rounded shape along a rounded cutout formed at a longitudinally corresponding end of the lower pattern, The lower cover film, and the guiding film and the step film are each formed in the longitudinally corresponding end portions in the rounded shape, or
The electrode terminals are provided in a longitudinally corresponding end portion of the lower pattern in an outwardly protruding manner and correspond to the electrode terminals formed at the longitudinally corresponding ends of the lower pattern, And a portion of the same shape as that of the electrode terminals is provided in the end portion so as to protrude and extend outward.

Images