KR101112211B1 - Tact switch for electronic component - Google Patents

Abstract

PURPOSE: A tact switch for an electronic component is provided to prevent life-shortening and contact fail due to the life-shortening by forming an electrode in a top pattern and maintaining a metal doom and the top pattern plate. CONSTITUTION: A pattern assembly(10) has a circuit pattern between insulating patterns. A metal doom(40) is bent and connects an upper pattern(20) to a lower pattern(30) when a button is clicked. A doom guide(60) guides the mounting of the metal doom and prevent the separation of the metal doom. A projection boss(50) is attached to the upper part of the metal doom to improve clicking or click rate. A top cover film(90) covers the top of the protrusion boss and the metal doom.

Description

Tact Switch for Electronic Component {TACT SWITCH FOR ELECTRONIC COMPONENT}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tact switch for electronic components that can be surface mounted on a circuit board, and more particularly, to a tact switch for electronic components having a structure for improving a click feeling when a button key is pressed together with a button connection ratio of an electronic component.

As is well known, the tact switch for electronic parts is a typical switch used in various electronic products for modernization because it performs the opening and closing operation of the circuit by light contact, and the opening and closing operation of the circuit is accurate, easy, and simple in structure. .

Recently, it is mainly used in portable communication devices such as cellular phones and miniaturized notebooks, portable cassettes, MP3s, etc., which are becoming more advanced and miniaturized. Tact switches are also small in weight, size and thickness. ), A tact switch is being developed.

An example of a conventionally developed tact switch is shown in detail in FIG. 1.

1 to 3 show a conventional tact switch, FIG. 1 is an exploded perspective view showing a configuration of a tact switch, FIG. 2 is a sectional view of a combination of a tact switch, and FIG. 3 is a combination showing a modified example of a tact switch. It is a cross section.

The conventional tact switch shown in FIGS. 1 to 3 is formed of an insulator which is not electrically conductive in a thin plate shape, and has an insulating member 100 having a through hole 110 formed in a central portion of the body, and an electrically conductive member. An upper pattern 200 formed on the upper surface of the insulating member 100, a lower pattern 300 attached to a lower surface of the insulating member 100 by a conductor capable of conducting electricity in a plate shape, and the lower pattern It is attached to the lower portion of the 300 is composed of an insulating layer 400 to prevent the short of the upper pattern 200 and the lower pattern 300 during soldering.

In addition, the body portion of the upper pattern 200 is integrally formed with an elastic contact portion 210 which is electrically connected and separated while contacting with the contact portion 310 of the lower pattern 300 while elastically bending when clicked, The elastic contact portion 210 is formed in a convex shape having a center, and the metal dome 500a, which is a dome-shaped elastic member 500, is positioned on the upper surface of the elastic contact portion 210 of the upper pattern 200 and has an insulating film ( 600) is a fixed installation, through which it is possible to secure the expansion of the appearance and stable clickability and durability.

However, in the conventional tact switch, between the elastic contact portion 210 and the contact portion 310 of the lower pattern 300 which protrude convexly in the center of the body of the upper pattern 200, and the metal dome 500a and the upper portion. Since there is an empty space between the patterns 200, when the tact switch is clicked, the metal dome 500a presses the elastic contact portion 210 to be in contact with the contact portion 310 of the lower pattern 300 to be electrically connected and disconnected. There is a problem that a poor contact occurs or a short occurs due to the accumulation of foreign matter present or generated between the empty space inside the metal dome 500a and the lower pattern 300.

In addition, the above-described conventional tact switch has a convex elastic contact portion and a metal dome formed on the upper surface of the elastic contact portion. There is a need for structural modifications that can improve the sense.

In addition, the structure of the above-described conventional switch products can shorten the life of the switch when the metal dome is pressed due to the step between the upper pattern and the lower pattern to shorten the life of the switch, thereby causing contact failure There was a problem.

The present invention has been made to solve the above-mentioned conventional problems, and when the button key of the electronic component is pressed, the pressing operation of the metal dome is smooth, the click rate or the click feeling is further improved, and the protruding boss can be used even for long-term use. It is an object of the present invention to provide a tact switch for an electronic component in which separation is prevented and an electronic component button connection rate is improved.

The present invention to achieve the above object,

A pattern assembly in which an upper pattern and a lower pattern are electrically connected up and down with an insulating panel having a constant thickness therebetween to form a circuit pattern; And a metal dome mounted on the surface of the upper pattern to elastically bend and electrically connect when the electronic component button is clicked.

The upper pattern has an insulating portion having a predetermined radius surrounding the central portion, and a first electrode portion and a second electrode portion having different polarities are formed inside and outside the insulating portion, and the lower pattern has an insulating portion formed across the lower pattern. First and second electrode parts are formed above and below the insulating part,

Through holes are drilled in the first and second electrode parts, respectively, and upper and lower patterns are electrically connected to the first and second electrode parts through the through holes, respectively.

The convex upper part of the metal dome covers the center of the surface of the upper pattern, and the periphery of the metal dome is seated on the second electrode part positioned outside the insulator part. The present invention provides a tact switch for an electronic component, wherein the first electrode portion is in contact with the first electrode portion and is electrically connected to the first electrode portion.

In addition, according to the present invention, a dome guide having an insertion hole of a predetermined diameter perforated to accommodate the metal dome is attached to the surface of the upper pattern to guide the mounting of the metal dome and prevent the detachment, or the upper pattern Forming a groove-shaped portion to receive the metal dome by press-pressing the surface center portion thereof;

The upper pattern has one or more vent holes extending outward along the circumferential end of the insulator for smooth operation of the metal dome,

The lower cover film is attached to the lower pattern surface, and the upper cover film is attached to the surface of the upper pattern on which the metal dome is mounted. Optionally, the top of the pattern assembly, that is, the upper part of the upper cover film covering the metal dome, has an electronic component button. A tact switch for electronic components is provided which can form a protruding boss for smooth pressing operation of the metal dome and an increase in click rate or click feeling when clicked.

The present invention having the basic configuration as described above can prevent contact failures or shorts caused by foreign matters, thereby increasing the electronic component button connection rate, and improving contact with the metal dome when the button key of the electronic component is pressed. And click feeling can be better.

In addition, in the present invention, since the electrode is formed on the upper pattern and the metal dome and the upper pattern surface maintain the correct flatness, the contact can be formed at an appropriate moving distance when the metal dome is pressed, and thus the switch life, which is a conventional problem. Shortening and the resulting contact failure can be prevented.

In addition, the present invention is because the protruding boss is attached to the bottom of the upper cover film to strengthen the binding force of the protruding boss is very low possibility of detachment of the protruding boss even by long-term use, the position of the protruding boss is between the top cover film and the metal dome Even if present in the predetermined space between them is formed because the inherent elasticity of the metal dome is exerted, the operation of the metal dome is still smooth and good click feeling when the button key of the electronic component is pressed.

1 is an exploded perspective view showing the configuration of a conventional tact switch for an electronic component;
FIG. 2 is a cross-sectional view illustrating a tact switch for an electronic component of FIG. 1; FIG.
3 is a cross-sectional view illustrating a modification of the tact switch for an electronic component of FIG. 1;
4 is an exploded perspective view listing the components of a tact switch for an electronic component according to a first embodiment of the present invention;
5 is a cross-sectional view of a first use state using the components of FIG. 4;
6 is a cross-sectional view of a second use state using the components of FIG. 4;
7 is an exploded perspective view listing components of a tact switch for an electronic component according to a second embodiment of the present invention;
8 is a cross-sectional view of a first use state using the components of FIG. 7;
9 is a cross-sectional view of a second use state using the components of FIG. 7;
10 is an external perspective view of a tact switch for an electronic component of the present invention according to the first use state of FIG. 5 or FIG. 8;
11 is an external perspective view of a tact switch for an electronic component of the present invention according to the second use state of FIG. 6 or FIG. 9;
12 is a bottom perspective view of a tact switch for an electronic component of the present invention assembled using the components according to the first embodiment of FIG. 4 or the second embodiment of FIG.

Hereinafter, a tact switch for an electronic component of the present invention will be described in detail with reference to the accompanying drawings.

In the following embodiments, illustration and description are omitted for parts not related to the invention in the drawings, and the same reference numerals are used for the same or similar elements throughout the specification, and the detailed description thereof will be omitted without repetition. do.

Example  One

4 is a view showing the components of the tact switch for an electronic component according to the first embodiment of the present invention. In this embodiment, the tact switch for the electronic component is formed of an insulator that does not conduct electricity in a plate shape having a predetermined thickness. Insulation panel 10, consisting of a plate-shaped conductor of a predetermined thickness capable of conducting electricity, the upper pattern 20 located on the upper surface of the insulation panel 10, and a plate-shaped conductor of a predetermined thickness capable of conducting insulation panel ( And a lower pattern 30 positioned on the lower surface of 10), thereby combining one pattern assembly.

The upper pattern 20 has an insulating portion 21 having a predetermined radius surrounding the center portion, and the first electrode portion 22 and the second electrode portion having different polarities inside and outside the insulating portion 21. 23 are formed respectively. In addition, a vent hole 24 is formed to extend at least one direction of the insulation portion 21, preferably, outward in each direction by a predetermined length.

The lower pattern 30 has a first electrode portion 31 having a substantially T shape and a second electrode portion 32 and 33 on both space portions of the first electrode portion with respect to the insulating portion 30a formed on the surface. It is a structure provided.

Through-holes 22a, 23a and 23b are perforated in the first electrode portion 22 and the second electrode portion 23 constituting the upper pattern 20, respectively, and the first portion constituting the lower pattern 30 is formed. Through-holes 31a, 32a and 33a are drilled in the electrode portion 31 and the second electrode portions 32 and 33, respectively, and the first electrode portions 22 and 31 are formed on the surface of the insulating panel 10. Communicating with the through holes 11 and the through holes 23a and 23b of the second electrode portions 23 and 32 and 33a. The through holes 12 and 13 are perforated.

Therefore, when these are combined, the upper pattern 20 and the lower pattern 30 are electrically connected to each other through the through holes 22a, 11, and 31a of the first electrode portions 22 and 31 with respect to the insulation panel 10. And the second electrode portions 23, 32 and 33 are electrically connected to each other through the through holes 23a, 12, 32a and the through holes 23b, 13, 33a. Will form.

In the drawing according to the present embodiment, the first electrode parts 22 and 31 are connected to the positive electrode (+), and the second electrode parts 23 and 32 and 33 are connected to the negative electrode (-). .

In addition to the insulating panel 10, the upper pattern 20, and the lower pattern 30, the tact switch for an electronic component according to the first embodiment of the present invention includes a metal dome 40 mounted on a surface of the upper pattern, and the metal. And a protruding boss 50 mounted on top of the dome.

The metal dome 40 is elastically bent when the electronic component button is clicked. When mounted on the upper pattern 20, the convex upper part thereof covers the first electrode part 22 of the upper pattern 20. The circumferential end is designed to be seated on the second electrode portion 23.

The protruding boss 50 is to improve the button connection rate and the feeling of click when the button key of the electronic component is pressed, and is designed to have a predetermined thickness in order to increase contact with the metal dome 40.

The tact switch for an electronic component according to the present embodiment may also include elements such as a dome guide 60, a boss guide 70, and upper and lower cover films 80 and 90 having a predetermined thickness. .

The dome guide 60 is provided to guide the mounting of the metal dome 40 mounted on the surface of the upper pattern and to prevent it from being detached. The dome guide 60 is attached to the surface of the upper pattern 20 outside the metal dome 40. And has an insertion hole 61 of a predetermined diameter perforated to accommodate the metal dome 40. The dome guide 60 may be formed of a metal plate or film paper having a predetermined thickness.

The boss guide 70 is provided to guide the mounting of the protruding boss 50 mounted on the upper surface of the metal dome 40 and prevent it from being detached. It is attached to the upper surface and the surface of the dome guide 60, and has an insertion hole 71 of a predetermined diameter perforated to accommodate the projecting boss (50). The boss guide 70 is preferably composed of a film of a predetermined thickness or the like.

The lower cover film 80 and the upper cover film 90 cover the upper and lower portions of the tact switch for an electronic component according to the present embodiment, respectively, through which the lower cover film 80 is attached. The dust-proof effect of blocking foreign substances such as dust is realized from the upper portion, and the water or moisture penetrated through the plurality of through holes is blocked from the lower portion of the lower pattern 30 to which the upper cover film 90 is attached, thereby waterproofing. The effect can be realized.

In particular, the lower cover film 80 has a shape in which four corners are cut out, and when the lower cover film 80 is bonded to the surface of the lower pattern 30, the lower cover film 80 is formed by the respective cutouts 81. First and second terminal portions 31b (see FIG. 12) and second terminal portions 32b and 33b (see FIG. 12) to which the solder leads are respectively formed are formed on the first electrode portion 31 and the second electrode portions 32 and 33, respectively. .

Meanwhile, when the dome guide 60 and the boss guide 70 including the lower cover film 80 and the upper cover film 90 are also made of a film, it is preferable that these films are made of an electrical insulating material. Materials such as PI film and PET film can also be used. In particular, the lower cover film 80 may be implemented by printing on the lower pattern 30 instead. Alternatively, the first terminal portion 31b and the first terminal portion 31b may be formed at each corner of the lower pattern 30. It is a matter of course that a pattern may be formed by using a film or a printing method to form a soldering terminal such as the two terminal portions 32b and 33b.

In the present invention, it is preferable that the upper pattern 20 and the lower pattern 30 use a plate member made of a metal or a nonmetal as a conductor.

The assembly of the tact switch for an electronic component according to the present embodiment including the components described above is made of an optional combination of these components according to the respective purpose of use. This will be described in detail as follows.

5 is a cross-sectional view of a first use state using the components of FIG. 4, FIG. 10 is an external perspective view of a tact switch for an electronic component of the present invention according to FIG. 5, and FIG. 12 is a tact switch for an electronic component of the present invention according to FIG. 10. Bottom perspective view.

According to FIG. 5, in the assembly of the tact switch for an electronic component, the upper pattern 20 and the lower pattern 30 are integrally bonded with the insulating panel 10 interposed therebetween. In this case, the upper pattern 20 and the lower pattern 30 are electrically connected to the first electrode portions 22 and 31 through the through holes 22a, 11, and 31a, and the second electrode portion 23 is formed. 32 and 33 are electrically connected to each other through the through holes 23a, 12 and 32a, and the through holes 23b and 13 and 33a.

The dome guide 60 is attached to the surface circumference of the upper pattern 20, and the metal dome 40 is mounted to the central portion of the upper pattern 20 through the insertion hole 61 of the dome guide 60. When mounted on the surface of the upper pattern 20, the metal dome 40 covers the first electrode portion 22 of the upper pattern 20 and is seated on the second electrode portion 23. At this time, the position of the lower circumferential end of the metal dome 40 is preferably placed on the vent hole 24 extending outward from the insulating portion 21 of the upper pattern 20. As a result, when the electronic component button is clicked, the metal dome 40 elastically bends and contacts the first electrode part 22 so that the first electrode parts 22 and 31 and the second electrode parts 23 and 32 and 33 are. ) Is electrically connected to each other and at the same time through the vent hole 24 can temporarily receive the air exiting from the inside of the metal dome 40, it is possible to smoothly press the metal dome 40.

In addition, the top cover film 90 is covered on the surfaces of the metal dome 40 and the dome guide 60 to be simultaneously attached to the surfaces of the metal dome 40 and the dome guide 60, and above the metal dome 40. Protruding boss 50 is attached to the upper center point. The lower cover film 80 is covered and attached to the surface of the lower pattern 30.

The external configuration of the tact switch for an electronic component of the present invention assembled as described above is illustrated in FIGS. 10 and 12. When the button key of the electronic component is pressed, the operation of the metal dome 40 is smooth and the button key and the metal are pressed. The contactability of the dome 40 is also improved to increase the electronic component button connection rate, and the click feeling of the button key of the electronic component can be further improved.

6 is a cross-sectional view of a second use state using the components of FIG. 4, FIG. 11 is an external perspective view of a tact switch for an electronic component according to FIG. 6, and FIG. 12 is a tact switch for an electronic component according to FIG. 11. Bottom perspective view.

The second use state of the tact switch for an electronic component according to the first embodiment of the present invention shown in FIG. 6 is mostly the same as the first use state of FIG. 5, except that the protruding boss 50 is formed of the metal dome 40. There is a difference in that the boss guide 70 is used between the upper cover films 90.

In detail, the boss guide 70 is attached to the surfaces of the metal dome 40 and the dome guide 60, and the center portion of the surface of the metal dome 40 is inserted through the insertion hole 71 of the boss guide 70. The protruding boss 50 is mounted on it. The upper cover film 90 is covered thereon and simultaneously attached to the surfaces of the protruding boss 50 and the boss guide 70. The lower cover film 80 is covered and attached to the surface of the lower pattern 30.

The appearance configuration of the tact switch for an electronic component of the present invention assembled as described above is illustrated in FIGS. 11 and 12, through which the contact between the button key and the metal dome 40 may be improved, thereby increasing the electronic component button connection ratio. .

In addition, in the case of the combination example of FIG. 6, the protrusion boss 50 is attached to the bottom of the upper cover film 90, so that the binding force of the protrusion boss is stronger than that of the example of FIG. The probability of deviation is very low.

In addition, even if the position of the protruding boss 50 is present between the upper cover film 90 and the metal dome 40, since a predetermined space is formed therebetween, elasticity inherent in the metal dome 40 may be exerted. When the button key of the electronic component is pressed, the operation of the metal dome 40 is still smooth, so that a good click feeling can be maintained.

Example  2

7 is an exploded perspective view listing the components of a tact switch for an electronic component according to a second embodiment of the present invention.

Unlike in FIG. 4, the tact switch for an electronic component includes an insulation panel 110 made of an insulator that does not conduct electricity in a plate shape having a predetermined thickness, and an insulation panel 110 made of a plate-shaped conductor having a predetermined thickness. The upper pattern 120 is disposed on the upper surface of the), and the lower pattern 130, which is located on the lower surface of the insulating panel 110, consists of a plate-shaped conductor having a predetermined thickness that can be energized. Pattern assembly 100 is provided. In addition, instead of removing the dome guide 60 attached to the surface of the upper pattern 20 as shown in FIG. 4, the surface of the upper pattern 120 is pressed to press the insertion hole of the dome guide 30 shown in FIG. 4. The configuration as shown in (31), and through this to guide the mounting of the metal dome 40 was configured to provide the same effect as the combination of the upper pattern 20 and the dome guide 60 of FIG.

The upper pattern 120 has an insulating portion 21 surrounding the central portion, and the first electrode portion 22 and the second electrode portion 23 having different polarities in and out of the insulating portion 21. Are each formed. In addition, a vent hole 24 extending by a predetermined length outward in at least one direction, preferably in each direction, of the insulating portion 21 is provided.

The lower pattern 130 is provided in the same structure as the lower pattern 30 of FIG. 4, and although not shown, the first electrode portion 31 and the first electrode portion 31 having a substantially T shape are formed by an insulating portion 30a formed on the surface thereof. Second electrode portions 32 and 33 are formed at both corners of the first electrode portion, respectively.

Of course, through-holes 22a, 23a, and 23b are drilled in the first electrode portion 22 and the second electrode portion 23 constituting the upper pattern 120, and the lower pattern 130 is formed. Although not shown in the first electrode portion 31 and the second electrode portions 32 and 33, the through holes 31 a and 32 a and 33 a are drilled in the same manner as in FIG. 4. The through-hole 11 and the second electrode portions 23, 32, 33 communicating with the through-holes 22a, 31a of the first electrode portions 22, 31 are formed on the surface of the insulating panel 110. The through holes 12 and 13 communicating with the through holes 23a and 23b (32a and 33a) are respectively drilled.

Therefore, as shown in FIG. 7, when the upper pattern 20 and the lower pattern 30 are integrally coupled around the insulating panel 10 to form a single member, the first electrode portions 22 and 31 may pass through holes. (22a) (11) and (31a) are electrically connected, and the second electrode portions (23, 32, 33) are through holes (23a), 12 (32a) and through holes (23b) (13). Are electrically connected via (33a).

Also in this embodiment, the first electrode parts 22 and 31 are connected to the positive electrode (+) and the second electrode parts 23 and 32 and 33 are connected to the negative electrode (-).

In the tact switch for an electronic component according to the second embodiment of the present invention, in addition to the pattern assembly 100 in which the insulating panel 110, the upper pattern 120, and the lower pattern 130 are combined into one member, the upper pattern 120 is formed. It further includes a metal dome 40 mounted on the surface of the) and a protrusion boss 50 mounted on the metal dome.

When the metal dome 40 is mounted on the upper pattern 120, the convex upper part thereof covers the first electrode part 22 of the upper pattern 120 and the lower end of the metal dome 40 is seated on the second electrode part 23. Is designed.

The protruding boss 50 is designed to have a predetermined thickness to increase contact with the metal dome 40.

The tact switch for an electronic component according to the present embodiment also includes elements such as a boss guide 70 and upper and lower cover films 80 and 90 having a predetermined thickness.

The boss guide 70 is provided to guide the mounting of the protruding boss 50 mounted on the upper surface of the metal dome 40 and prevent it from being detached. It is attached to the upper surface and the surface of the upper pattern 120, and has an insertion hole 71 of a predetermined diameter perforated to accommodate the projecting boss (50). The boss guide 70 is preferably composed of a film of a predetermined thickness or the like.

The lower cover film 80 and the upper cover film 90 cover the upper and lower portions of the tact switch for an electronic component according to the present embodiment, as shown in FIG. 4, and the upper pattern to which the lower cover film 80 is attached. The dustproof effect of blocking foreign substances such as dust is realized from the upper portion of the 120, and moisture or moisture penetrating through the plurality of through holes from the lower portion of the lower pattern 130 to which the upper cover film 90 is attached. Can be blocked to realize the waterproof effect.

In particular, the lower cover film 80 has a shape in which the four corners are cut outs 81, and when the lower cover film 80 is bonded to the surface of the lower patterns 130, the lower cover films 80 are formed by the respective cuts 81. First and second terminal portions 31b (see FIG. 12) and second terminal portions 32b and 33b (see FIG. 12) to which the solder leads are respectively formed are formed on the first electrode portion 31 and the second electrode portions 32 and 33, respectively. .

The assembly of the tact switch for an electronic component according to the present embodiment including the components described above is made of an optional combination of these components according to the respective purpose of use. This will be described in detail as follows.

8 is a cross-sectional view of a first use state using the components of FIG. 7, FIG. 10 is an external perspective view of a tact switch for an electronic component according to FIG. 8, and FIG. 12 is a tact switch for an electronic component according to FIG. 10. Bottom perspective view.

According to FIG. 8, in the assembly of the tact switch for the electronic component, the metal dome 40 is first mounted at the center of the upper pattern 120. When the metal dome 40 is mounted on the surface of the upper pattern 120, the metal dome 40 covers the first electrode part 22 of the upper pattern 120 and is seated on the second electrode part 23. The position of the lower circumferential end is preferably placed on the vent hole 24 extending outward from the insulating portion 21 of the upper pattern 120.

As a result, when the electronic component button is clicked, the metal dome 40 elastically bends and contacts the first electrode part 22 so that the first electrode parts 22 and 31 and the second electrode parts 23 and 32 and 33 are. ) Is electrically connected to each other and at the same time through the vent hole 24 can temporarily receive the air exiting from the inside of the metal dome 40, it is possible to smoothly press the metal dome 40.

In addition, the top cover film 90 is covered on the surfaces of the metal dome 40 and the upper pattern 120 to be attached to the surfaces of the metal dome 40 and the upper pattern 120 at the same time. Protruding boss 50 is attached to the upper center point. The lower cover film 80 is covered and attached to the surface of the lower pattern 130.

The external configuration of the tact switch for an electronic component of the present invention assembled as described above is illustrated in FIGS. 10 and 12. When the button key of the electronic component is pressed, the operation of the metal dome 40 is smooth and the button key and the metal are pressed. The contactability of the dome 40 is also improved to increase the electronic component button connection rate, and the click feeling of the button key of the electronic component can be further improved.

9 is a cross-sectional view of a second use state using the components of FIG. 7, FIG. 11 is an external perspective view of a tact switch for an electronic component of the present invention according to FIG. 9, and FIG. 12 is a tact switch for an electronic component of the present invention according to FIG. 11. Bottom perspective view.

The second use state of the tact switch for an electronic component according to the second embodiment of the present invention shown in FIG. 9 is mostly the same as the first use state of FIG. 8, except that the protruding boss 50 is connected to the metal dome 40. There is a difference in that the boss guide 70 is used between the upper cover films 90.

In detail, the boss guide 70 is attached to the surface of the metal dome 40 and the upper pattern 120, and the center portion of the surface of the metal dome 40 is inserted through the insertion hole 71 of the boss guide 70. The protruding boss 50 is mounted on it. The upper cover film 90 is covered thereon and simultaneously attached to the surfaces of the protruding boss 50 and the boss guide 70. The lower cover film 80 is covered and attached to the surface of the lower pattern 130.

The appearance configuration of the tact switch for an electronic component of the present invention assembled as described above is illustrated in FIGS. 11 and 12, through which the contact between the electronic component button key and the metal dome 40 is improved, thereby increasing the electronic component button connection ratio. Can be.

In addition, since the protrusion boss 50 is attached to the bottom of the upper cover film 90 in the case of the combination example of FIG. 9, the binding force of the protrusion boss is strengthened as compared to the example of FIG. The probability of deviation is very low.

In addition, even if the position of the protruding boss 50 is present between the upper cover film 90 and the metal dome 40, since a predetermined space is formed therebetween, elasticity inherent in the metal dome 40 may be exerted. When the button key of the electronic component is pressed, the operation of the metal dome 40 is still smooth, so that a good click feeling can be maintained.

Through the above-described configuration, the tact switch for the electronic component of the present invention can prevent contact defects or short circuits caused by foreign matters, thereby increasing the electronic component button connection rate, and when pressing the button key of the electronic component, Improves contactability and improves clickthrough rate and click feeling.

100: pattern assembly 20,120: upper pattern
30,130: lower pattern 10,110: insulated panel
21,30a: insulation 22,31: first electrode
23, 32, 33: second electrode portion 24: vent hole
22a, 23a, 23b, 31a, 32a, 33a, 12,13: through hole
31b, 32b, 33b: Terminal part 40: Metal dome
50: protrusion boss 60: dome guide
61,71: insertion hole 70: boss guide
80: lower cover film 81: cutout
90: top cover film

Claims (7)

As a tact switch for an electronic component,
A pattern assembly in which an upper pattern and a lower pattern are electrically connected up and down with an insulating panel having a constant thickness therebetween to form a circuit pattern; And
A metal dome mounted on a surface of the upper pattern to elastically bend when an electronic component button is clicked so that the upper pattern and the lower pattern are electrically connected to each other;
On the surface of the upper pattern, a dome guide having a predetermined diameter insertion hole for accommodating the metal dome is installed to guide the mounting of the metal dome and prevent separation, or press-press the center portion of the upper pattern to press Forming a groove shape corresponding to the insertion hole to accommodate the metal dome,
And a protruding boss attached to an upper portion of the metal dome for improving a feeling of click or click rate. The method of claim 1,
The upper pattern has an insulating portion having a predetermined radius surrounding a central portion, and a first electrode portion and a second electrode portion having different polarities are formed inside and outside the insulating portion.
The lower pattern has a first electrode portion and a second electrode portion formed at both ends of the first electrode portion with respect to the insulating portion formed on the pattern surface,
Through holes are formed in the first electrode portion, the second electrode portion, and the insulating panel to correspond to each other, and upper and lower patterns are electrically formed by the first electrode portion and the second electrode portion, respectively, through the through holes. Tact switch for electronic components, characterized in that connected. The method of claim 2,
The metal dome has its convex upper part covering the center of the surface of the upper pattern, and its circumferential end is seated on the second electrode part which is located outside the insulator part. The tact switch for an electronic component, wherein the first electrode part and the second electrode part are electrically connected to each other by being in contact with the first electrode part located inside the part. delete 4. The method according to any one of claims 1 to 3,
And a top cover film covering the protruding boss and the upper portion of the metal dome. The method of claim 3,
And the upper pattern includes one or more vent holes extending in an outer circumferential direction of the insulation to smoothly operate the metal dome. 6. The method of claim 5,
And a boss guide having an insertion hole of a predetermined diameter surrounding the protrusion boss to guide the mounting of the protrusion boss and prevent separation thereof.

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