A new switch that prevents silver ion migration

Abstract

The present invention provides a new type of switch that prevents silver ion migration, and relates to the technical field of tactile switches. The new type of switch that prevents silver ion migration includes a base, an operating electrode, a dome member, a key, and a top cover, a mounting groove formed in the base, operating electrodes disposed on opposite sides of the base, with the contacts of the operating electrodes located in the mounting grooves and the pins of the operating electrodes located outside the base, a support member disposed in the mounting grooves and positioned between the operating electrodes, a dome member mounted on the support member, and the dome member not contacting any of the contacts of the operating electrodes when not under pressure, a top cover overlaid on the base, and a key mounted on the top cover that can actuate the dome member, achieving the technical effect of reducing the probability of silver migration.

Description

[Technical Field]

[0001] The present invention relates to the field of tactile switches, and more particularly to a new type of switch that prevents silver ion migration. [Background technology]

[0002] A tactile switch is an electronic switch that belongs to the electronic component category and is also known as a key switch. It first appeared in Japan and is called a sensing switch. When in use, by satisfying the operating force conditions, pressure is applied in the direction of the switch operation to close and turn on the switch function, and when the pressure is removed, the switch turns off. Its internal structure turns on and off according to changes in the force received by the metal dome member.

[0003] However, in the conventional tactile switches, the trigger dome member is always in contact with a certain electrode, and therefore, silver migration occurs during actual use.

[0004] Here, the silver migration phenomenon refers to the phenomenon in which, in a humid environment with a DC voltage gradient, water molecules penetrate the surface of a silver-containing conductor and electrolyze to form hydrogen ions and hydroxide ions. Under the action of the electric field and hydroxide ions, silver dissociates to produce silver ions, causing a reversible reaction. Under the action of the electric field, the silver ions migrate from a high potential to a low potential, expanding in the form of cotton or tendrils, and forming black silver oxide at the boundary between the high and low potentials. The silver migration phenomenon can be clearly observed using the well-known water drop test.

[0005] However, the occurrence of silver migration can cause tactile switches to malfunction, resulting in serious accidents.

[0006] Therefore, providing a new type of switch that prevents silver ion migration is an important technical problem that those skilled in the art are trying to solve. Summary of the Invention [Problem to be solved by the invention]

[0007] The object of the present invention is to provide a new type of switch that prevents silver ion migration so as to alleviate the technical problem of high probability of silver migration occurring in the prior art. [Means for solving the problem]

[0008] In a first aspect, an embodiment of the present invention provides a novel switch for inhibiting silver ion migration, the switch comprising a base, an operating electrode, a dome member, a key, and a top cover; The base has mounting grooves, the working electrodes are provided on opposite sides of the base, and the contacts of the working electrodes are located within the mounting grooves, and the pins of the working electrodes are located outside the base; a support member is provided within the mounting groove, the support member being positioned between the working electrodes, the dome member being mounted on the support member, and the dome member not contacting any of the contacts of the working electrodes when not under pressure; The top cover is placed on the base, the key is attached on the top cover, and the key can actuate the dome member, providing a new type of switch that prevents silver ion migration.

[0009] In accordance with the first aspect, an embodiment of the present invention provides a possible embodiment of the first aspect, wherein the support member includes two support bases, the two support bases are arranged opposite each other on both sides of the mounting groove, and the support bases and the operating electrode are located on different side walls of the mounting groove.

[0010] In accordance with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein an isolation groove is opened in the mounting groove, and the isolation groove is located between the working electrodes.

[0011] In accordance with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the number of the separation grooves is plural, and the extension direction of the separation grooves is perpendicular to the connection of the working electrodes.

[0012] In accordance with the first aspect, embodiments of the present invention provide possible implementations of the first aspect, wherein the dome member comprises a contact dome and a depression dome; The contact domes are mounted on the two support bases, and the depression dome covers the contact domes.

[0013] According to the first aspect, an embodiment of the present invention provides a possible embodiment of the first aspect, wherein the contact dome is cross-shaped, two opposing contacts on the contact dome are respectively mounted on the support base, and the other two opposing contacts can abut against contacts of the working electrode; The longitudinal cross section of the contact dome is arcuate, and the curvature at the intermediate position of the contact dome is greater than the curvature around the periphery of the contact dome.

[0014] In accordance with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the depression dome is circular and the longitudinal cross section of the depression dome is arc-shaped.

[0015] In accordance with the first aspect, the present invention provides a possible embodiment of the first aspect, wherein a waterproof skin is coated on the base, and a sealing convex ring is provided on the top surface of the base to abut against the waterproof skin.

[0016] In accordance with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the top cover has a mounting hole, and the key is disposed to slide and seal within the mounting hole.

[0017] In accordance with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the working electrode is provided by injection molding within the base. [Effects of the Invention]

[0018] The present invention provides a new type of switch that prevents silver ion migration, comprising: a base, an operating electrode, a dome member, a key, and a top cover; a mounting groove formed in the base; operating electrodes disposed on opposite sides of the base, with the contacts of the operating electrodes all located in the mounting grooves; the pins of the operating electrodes all located outside the base; a support member disposed in the mounting grooves and positioned between the operating electrodes; a dome member mounted on the support member, with the dome member not contacting any of the contacts of the operating electrodes when not under pressure; a top cover overlaying the base; a key mounted on the top cover, which can actuate the dome member.

[0019] Specifically, each working electrode is provided with only one contact, and the contacts of the working electrodes are located on opposite sides of the mounting groove, respectively, to increase the distance between the contacts of the working electrodes and prevent silver migration from occurring between the contacts of the working electrodes. In addition, a support member is provided in the mounting groove, and a dome member is mounted on the support member. When the dome member is not under pressure, the dome member does not come into contact with the contacts of the working electrodes, so the contacts of the working electrodes and the contacts of the dome member are in a separate, non-contact state, which effectively reduces and even prevents silver migration from occurring in the contacts of the working electrodes and the dome member. [Brief explanation of the drawings]

[0020] In order to more clearly describe the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces drawings that need to be used to describe the specific embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative efforts. [Figure 1] 1 is a schematic diagram of a new type of switch for preventing silver ion migration provided in an embodiment of the present invention. [Figure 2]FIG. 2 is a schematic exploded view of a method for reducing the probability of silver migration provided in an embodiment of the present invention. [Figure 3] 1 is a top view of a method for reducing the probability of silver migration provided in an embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Figure 5] FIG. 4 is a cross-sectional view of BB in FIG. [Figure 6] 2 is a schematic diagram of a base, working electrode, and dome member that reduce the probability of silver migration provided in an embodiment of the present invention. [Figure 7] 1 is a schematic diagram of a base, working electrode, and dome member (in which the hold-down dome is not shown) that reduces the probability of silver migration provided in an embodiment of the present invention. [Figure 8] 1 is a schematic diagram of a base and working electrode that reduces the probability of silver migration provided in an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] The technical solutions of the present invention will be described clearly and completely below with reference to the drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments that can be obtained by those skilled in the art without any creative efforts belong to the scope of protection of the present invention.

[0022] In describing the present invention, the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are orientations or positional relationships shown based on the drawings, and are intended merely to facilitate and simplify the description of the present invention, and do not indicate or imply that such devices or elements must have a particular orientation or be configured and operated in a particular orientation, and therefore should not be understood as limiting the present invention.

[0023] Additionally, the terms "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying relative importance or the number of technical features indicated. Thus, a feature qualified as "first" or "second" may explicitly or implicitly include one or more of such features. In describing the present invention, unless otherwise specified, "plurality" means two or more.

[0024] In the present invention, unless otherwise clearly specified or limited, the terms "attached," "connected," "coupled," "fixed," etc. should be understood in a broad sense, and may mean, for example, fixedly connected, detachably connected, or integral, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0025] Hereinafter, the present invention will be described in more detail through specific embodiments with reference to the drawings.

[0026] As shown in Figures 1, 2, 3, 4, 5, 6, 7 and 8, this embodiment provides a new type of switch for preventing silver ion migration, which includes a base 100, an operating electrode 200, a dome member 300, a key 400 and a top cover 500. The base 100 has a mounting groove 110, the operating electrodes 200 are provided on opposite sides of the base 100, and the contacts of the operating electrodes 200 are all located in the mounting grooves 110. are all located outside the base 100, a support member 120 is provided in the mounting groove 110, the support member 120 is located between the working electrodes 200, the dome member 300 is mounted on the support member 120, and the dome member 300 does not contact any of the contacts of the working electrodes 200 when not under pressure, a top cover 500 is covered on the base 100, a key 400 is mounted on the top cover 500, and the key 400 can drive the dome member 300.

[0027] Specifically, each working electrode 200 is provided with only one contact, and the contacts of the working electrodes 200 are located on opposite sides of the mounting groove 110, respectively, to increase the distance between the contacts of the working electrodes 200 and prevent silver migration from occurring at the contacts of the working electrodes 200. In addition, the support member 120 is provided in the mounting groove 110, and the dome member 300 is provided on the support member 120. When the dome member 300 is not under pressure, the dome member 300 does not come into contact with the contacts of the working electrodes 200. Therefore, the contacts of the working electrodes 200 and the dome member 300 are in a separate, non-contact state, which effectively reduces and even prevents silver migration from occurring at the contacts of the working electrodes 200 and the dome member 300.

[0028] Here, the number of working electrodes 200 may be two, three, four, etc., which can be determined by those skilled in the art according to actual needs.

[0029] In addition, in the conventional tactile switch, the internal working electrode 200 has three contacts, of which the first working electrode 200 has two contacts and the second working electrode 200 has one contact. The trigger dome is always in contact with the two contacts of the first working electrode 200, and when pressure is applied, the trigger dome can contact the contact of the second working electrode 200, thereby establishing electrical continuity. However, this is very likely to cause silver migration, which will cause the tactile switch to short-circuit.

[0030] Here, in the new type of switch that prevents silver ion migration provided in this embodiment, each of the two working electrodes 200 has one contact, and when pressure is applied and not triggered, the contact on the dome member 300 does not make contact with the contact on the working electrode 200, thereby fundamentally eliminating the conditions for silver migration to occur.

[0031] As shown in Figures 1 to 8, in an optional solution of this embodiment, the support member 120 includes two support bases 121, which are arranged opposite each other on both sides of the mounting groove 110, and the support bases 121 and the working electrode 200 are located on different side walls of the mounting groove 110.

[0032] Specifically, the dome member 300 is supported by two support bases 121, and there is no contact between the dome member 300 and the operating electrode 200, thereby preventing silver migration from occurring between the operating electrode 200 and the dome member 300.

[0033] As shown in Figures 1 to 8, in an optional solution of this embodiment, the dome member 300 includes a contact dome 310 and a pressing dome 320, and the contact dome 310 is mounted on two support bases 121, and the pressing dome 320 covers the contact dome 310.

[0034] Specifically, the contact dome 310 is arranged in a cross shape, and two opposing contacts of the contact dome 310 are respectively mounted on the support base 121, and the other two opposing contacts can abut against the contacts of the working electrode 200. When the contact dome 310 is not under pressure, the contacts of the contact dome 310 do not move downward and therefore do not come into contact with the working electrode 200. In addition, the vertical cross section of the contact dome 310 is arc-shaped, and the curvature of the middle position of the contact dome 310 is greater than the curvature around the contact dome 310. This arrangement improves the elasticity of the contact dome 310, and the contact dome can quickly return to its original position when the pressure applied to the contact dome is released.

[0035] In addition, the pressing dome 320 is circular, and the longitudinal section of the pressing dome 320 is arc-shaped, and with such an arrangement, the pressing dome 320 can press the contact dome 310 downwards better.

[0036] As shown in FIGS. 1 to 8, in an alternative solution of this embodiment, a separation groove 130 is opened in the mounting groove 110, and the separation groove 130 is located between two working electrodes 200.

[0037] Specifically, a separation groove 130 is formed in the mounting groove 110 and positioned between the two working electrodes 200, thereby separating the two working electrodes 200. If water droplets appear in the base 100, they can flow into the separation groove 130. If a humid environment occurs in the base 100 and silver migration occurs between the two working electrodes 200, the silver will have great difficulty migrating into the separation groove 130 and continuing to move forward. This will generally require the separation groove 130 to fill up or cause a large-scale water leakage phenomenon within the base 100. Therefore, the installation of the separation groove 130 can reduce and even eliminate silver migration between the two working electrodes 200.

[0038] Here, the number of the separation grooves 130 may be set to a plurality, and the extending direction of the separation grooves 130 is perpendicular to the connection of the two working electrodes 200 .

[0039] As shown in FIGS. 1 to 8, in the optional solution of this embodiment, a waterproof skin 140 is covered on the base 100, and a sealing convex ring 150 that abuts against the waterproof skin 140 is provided on the top surface of the base 100.

[0040] Specifically, the waterproof skin 140 and the sealing protrusion ring 150 provide a seal between the base 100 and the top cover 500 .

[0041] Here, the waterproof skin 140 may be made of silica gel, latex, or the like.

[0042] As shown in FIGS. 1 to 8, in an alternative solution of this embodiment, a mounting hole is provided in the top cover 500, and the key 400 is provided in the mounting hole so as to slide and seal therein.

[0043] Specifically, the key 400 and the top cover 500 are slidingly sealed to prevent water leakage between the key 400 and the top cover 500 .

[0044] In an alternative solution of this embodiment, two working electrodes 200 are injection molded into the base 100 .

[0045] Specifically, the two working electrodes 200 can be provided in the base 100 by injection molding.

[0046] Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention, and are not intended to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments, or equivalently replace part or all of the technical features thereof, and these modifications or replacements will not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of each embodiment of the present invention. [Explanation of symbols]

[0047] 100...base, 110...mounting groove, 120...support member, 121...support base, 130...separation groove, 140...waterproof skin, 150...sealing convex ring, 200... working electrode, 300...dome member, 310...contact dome, 320...pressure dome, 400...Key 500...Top lid.

Claims

1. A new type of switch that prevents silver ion migration, comprising a base (100), an operating electrode (200), a dome member (300), a key (400), and a top cover (500); The base (100) has a mounting groove (110), the working electrodes (200) are provided on opposite sides of the base (100), and the contacts of the working electrodes (200) are all located within the mounting groove (110), and the pins of the working electrodes (200) are all located outside the base (100); a support member (120) is provided within the mounting groove (110), the support member (120) is positioned between the working electrodes (200), the dome member (300) is mounted on the support member (120), and the dome member (300) does not contact any of the contacts of the working electrodes (200) when not under pressure; A new type of switch that prevents silver ion migration, characterized in that the top cover (500) is covered on the base (100), the key (400) is attached on the top cover (500), and the key (400) can drive the dome member (300).

2. 2. The new type of switch for preventing silver ion migration as claimed in claim 1, characterized in that the support member (120) includes two support bases (121), the two support bases (121) are arranged opposite each other on both sides of the mounting groove (110), and the support bases (121) and the operating electrode (200) are located on different side walls of the mounting groove (110).

3. The new type of switch for preventing silver ion migration as claimed in claim 2, characterized in that a separation groove (130) is opened in the mounting groove (110), and the separation groove (130) is located between the working electrodes (200).

4. The new type of switch for preventing silver ion migration, as described in claim 3, characterized in that the number of the separation grooves (130) is plural, and the extension direction of the separation grooves (130) is perpendicular to the connection of the operating electrode (200).

5. The dome member (300) includes a contact dome (310) and a depression dome (320); The new type of switch for preventing silver ion migration as claimed in claim 2, characterized in that the contact dome (310) is mounted on the two support bases (121), and the depression dome (320) covers the contact dome (310).

6. The contact dome (310) is cross-shaped, and two opposing contacts of the contact dome (310) are respectively mounted on the support base (121), and the other two opposing contacts can abut against the contact points of the working electrode (200); The new type of switch for preventing silver ion migration as claimed in claim 5, characterized in that the longitudinal section of the contact dome (310) is arc-shaped, and the curvature of the intermediate position of the contact dome (310) is greater than the curvature around the contact dome (310).

7. The new type of switch for preventing silver ion migration as claimed in claim 6, characterized in that the depression dome (320) is circular, and the longitudinal section of the depression dome (320) is arc-shaped.

8. A new type of switch for preventing silver ion migration, as described in any one of claims 1 to 7, characterized in that a waterproof skin (140) is coated on the base (100), and a sealing convex ring (150) is provided on the top surface of the base (100) to abut against the waterproof skin (140).

9. A new type of switch for preventing silver ion migration, as described in any one of claims 1 to 7, characterized in that an attachment hole is opened in the top cover (500), and the key (400) is arranged to slide and seal within the attachment hole.

10. The new type of switch for preventing silver ion migration according to any one of claims 1 to 7, characterized in that the working electrode (200) is injection molded into the base (100).

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