Novel switch to block silver ion migration

Abstract

The application provides a novel switch for blocking silver ion migration, and relates to the technical field of light touch switches. The novel switch for blocking silver ion migration comprises a base, working electrodes, a spring piece, a key and an upper cover. The base is provided with a mounting groove. The working electrodes are arranged on opposite sides of the base, and the contacts of the working electrodes are located in the mounting groove. The pins of the working electrodes are located outside the base. A support is arranged in the mounting groove and located between the working electrodes. The spring piece is mounted on the support, and the spring piece is not in contact with the contacts of the working electrodes when the spring piece is not pressed. The upper cover is arranged on the base, the key is mounted on the upper cover, and the key can drive the spring piece. The technical effect of reducing the probability of silver migration is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tactile switches, in particular to a new type of switch that prevents silver ion migration. BACKGROUND

[0002] A tactile switch is an electronic switch belonging to the electronic component category, also known as a key switch. It first appeared in Japan and is called a sensitive switch. When used, it is closed and connected by applying pressure to the operating direction of the switch under the condition of meeting the operating force. When the pressure is removed, the switch is disconnected. Its internal structure is realized by the force change of the metal spring piece.

[0003] However, the trigger spring piece of the existing tactile switch is always in contact with a certain electrode, so silver migration phenomenon occurs during actual use.

[0004] Silver migration (Silver Migration) phenomenon refers to the penetration of water molecules into the surface of a silver-containing conductor in a humid environment with a direct current voltage gradient, and the formation of hydrogen ions and hydroxyl ions by electrolysis. Silver ions are generated by the action of the electric field and hydroxyl ions, and a reversible reaction occurs. Under the action of the electric field, silver ions migrate from high potential to low potential and form flocculent or dendritic extensions, forming black silver oxide on the boundary connecting high and low potentials. The silver migration phenomenon can be clearly observed through the famous water drop test.

[0005] However, the occurrence of silver migration phenomenon can cause the tactile switch to be triggered by mistake, leading to serious accidents.

[0006] Therefore, it is an important technical problem for those skilled in the art to provide a new type of switch that prevents silver ion migration. SUMMARY

[0007] The purpose of the present application is to provide a new type of switch that prevents silver ion migration to alleviate the technical problem of high probability of silver migration in the prior art.

[0008] In a first aspect, the present application provides a new type of switch that prevents silver ion migration, comprising a base, a working electrode, a spring piece, a key, and an upper cover.

[0009] The base is provided with a mounting groove, the working electrodes are arranged on opposite sides of the base, and the contacts of the working electrodes are located in the mounting groove, and the pins of the working electrodes are located outside the base.

[0010] The mounting groove is provided with a support, the support is located between the working electrodes, and the spring piece is installed on the support, and the spring piece is not in contact with the contacts of the working electrodes when not under pressure.

[0011] The upper cover is arranged on the base, the button is arranged on the upper cover, and the button can drive the elastic sheet.

[0012] With reference to the first aspect, in a possible implementation of the first aspect, the support member comprises two support platforms, the two support platforms are oppositely arranged on two sides of the mounting groove, and the support platforms and the working electrodes are located on different side walls of the mounting groove.

[0013] With reference to the first aspect, in a possible implementation of the first aspect, a separation groove is arranged in the mounting groove, and the separation groove is located between the working electrodes.

[0014] With reference to the first aspect, in a possible implementation of the first aspect, 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.

[0015] With reference to the first aspect, in a possible implementation of the first aspect, the elastic sheet comprises a contact elastic sheet and a pressing elastic sheet.

[0016] The contact elastic sheet is arranged on the two support platforms, and the pressing elastic sheet covers the contact elastic sheet.

[0017] With reference to the first aspect, in a possible implementation of the first aspect, the contact elastic sheet is in a cross shape, two opposite contacts of the contact elastic sheet are arranged on the support platforms respectively, and the other two opposite contacts can abut against the contacts of the working electrodes.

[0018] The longitudinal section of the contact elastic sheet is in an arc shape, and the curvature of the middle position of the contact elastic sheet is greater than the curvature of the periphery of the contact elastic sheet.

[0019] With reference to the first aspect, in a possible implementation of the first aspect, the pressing elastic sheet is in a circular shape, and the longitudinal section of the pressing elastic sheet is in an arc shape.

[0020] With reference to the first aspect, in a possible implementation of the first aspect, the base is covered with a waterproof skin, and a sealing convex ring that abuts against the waterproof skin is arranged on the top surface of the base.

[0021] With reference to the first aspect, in a possible implementation of the first aspect, a mounting hole is arranged on the upper cover, and the button is slidingly and sealingly arranged in the mounting hole.

[0022] With reference to the first aspect, the present application provides a possible implementation manner of the first aspect, in which the working electrode is injection molded in the base.

[0023] Advantages:

[0024] The application provides a novel switch for blocking silver ion migration, comprising a base, working electrodes, a spring piece, a button and an upper cover; the base is provided with a mounting groove, the working electrodes are arranged on opposite sides of the base, and the contacts of the working electrodes are located in the mounting groove, and the pins of the electrodes are located outside the base; a support is arranged in the mounting groove, the support is located between the working electrodes, the spring piece is mounted on the support, and the spring piece is not in contact with the contacts of the working electrodes when the spring piece is not pressed.

[0025] Specifically, each working electrode is provided with only one contact, and the contacts of the working electrodes are located on opposite sides in the mounting groove, so that the distance between the contacts of the working electrodes is increased, and the silver migration phenomenon between the contacts of the working electrodes is avoided; in addition, the support is arranged in the mounting groove, the spring piece is arranged on the support, and the spring piece is not in contact with the contacts of the working electrodes when the spring piece is not pressed, so that the contacts of the working electrodes and the contacts of the spring piece are in a separate non-contact state, and the silver migration phenomenon between the contacts of the working electrodes and the spring piece can be effectively reduced or even avoided. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 A schematic diagram of the novel switch for blocking silver ion migration provided by the embodiments of the present application;

[0028] Figure 2 An explosion diagram for reducing the probability of silver migration provided by the embodiments of the present application;

[0029] Figure 3 A top view for reducing the probability of silver migration provided by the embodiments of the present application;

[0030] Figure 4 A Figure 3 Cross-sectional view of A-A in FIG. 6;

[0031] Figure 5 A Figure 3 Cross-sectional view of B-B in FIG. 6;

[0032] Figure 6 Schematic diagram of base, working electrode and spring piece for reducing the probability of occurrence of silver migration provided by the embodiment of the present application;

[0033] Figure 7 Schematic diagram of base, working electrode and spring piece for reducing the probability of occurrence of silver migration provided by the embodiment of the present application (wherein the lower pressing spring is not shown);

[0034] Figure 8 Schematic diagram of base and working electrode for reducing the probability of occurrence of silver migration provided by the embodiment of the present application.

[0035] Icon:

[0036] 100-base; 110-mounting groove; 120-supporting piece; 121-supporting table; 130-isolation groove; 140-waterproof skin; 150-sealing convex ring;

[0037] 200-working electrode;

[0038] 300-spring piece; 310-contact spring; 320-lower pressing spring;

[0039] 400-key;

[0040] 500-upper cover. DETAILED DESCRIPTION

[0041] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms “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 based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] In addition, the terms "first", "second", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0044] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0045] The present application will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0046] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 , the present embodiment provides a new switch for blocking silver ion migration, which comprises a base 100, a working electrode 200, a spring piece 300, a button 400 and an upper cover 500. The base 100 is provided with a mounting groove 110, the working electrode 200 is arranged on the opposite sides of the base 100, and the contacts of the working electrode 200 are located in the mounting groove 110, and the pins of the working electrode 200 are located outside the base 100. The mounting groove 110 is provided with a support 120, the support 120 is located between the working electrodes 200, the spring piece 300 is mounted on the support 120, and the contacts of the working electrodes 200 are not contacted when the spring piece 300 is not pressed. The upper cover 500 is provided on the base 100, the button 400 is mounted on the upper cover 500, and the button 400 can drive the spring piece 300.

[0047] Specifically, each working electrode 200 is provided with only one contact, and the contacts of the working electrode 200 are located at opposite sides in the mounting groove 110, respectively, so as to increase the distance of the contacts of the working electrode 200 and avoid the silver migration phenomenon of the contacts of the working electrode 200. In addition, the support 120 is arranged in the mounting groove 110, the spring piece 300 is arranged on the support 120, and when the spring piece 300 is not pressed, the spring piece 300 does not contact the contacts of the working electrode 200, so that the contacts of the working electrode 200 and the contacts of the spring piece 300 are in a separate non-contact state, which can effectively reduce or even avoid the silver migration phenomenon between the contacts of the working electrode 200 and the spring piece 300.

[0048] It should be noted that the working electrode 200 in the prior art has three contacts, the first working electrode 200 has two contacts, and the second working electrode 200 has one contact. The trigger spring always contacts the two contacts of the first working electrode 200, and then the pressure trigger spring contacts the contact of the second working electrode 200 to conduct, but this is prone to silver migration, which causes the tactile switch to short circuit.

[0049] It should be noted that the working electrode 200 in the prior art has three contacts, the first working electrode 200 has two contacts, and the second working electrode 200 has one contact. The trigger spring always contacts the two contacts of the first working electrode 200, and then the pressure trigger spring contacts the contact of the second working electrode 200 to conduct, but this is prone to silver migration, which causes the tactile switch to short circuit.

[0050] In the embodiment, the two working electrodes 200 in the new switch that prevents silver ion migration each have one contact, and when the spring piece 300 is not pressed, the contact on the spring piece 300 does not contact the contact of the working electrode 200, thereby eliminating the conditions for silver migration from the basic level.

[0051] Referring to Figures 1-8 In the optional solution of the embodiment, the support 120 includes two support tables 121, the two support tables 121 are oppositely arranged at two sides of the mounting groove 110, and the support table 121 and the working electrode 200 are located on different side walls of the mounting groove 110.

[0052] Specifically, the two support tables 121 support the spring piece 300, so that the spring piece 300 does not contact the working electrode 200, thereby avoiding the silver migration phenomenon between the working electrode 200 and the spring piece 300.

[0053] Referring to Figures 1-8 In the optional solution of the embodiment, the spring piece 300 includes a contact spring 310 and a pressing spring 320; the contact spring 310 is arranged on the two support tables 121, and the pressing spring 320 covers the contact spring 310.

[0054] Specifically, the contact spring 310 is arranged in a cross shape, and two opposite contacts on the contact spring 310 are arranged on the support table 121, and the other two opposite contacts can abut against the contacts of the working electrode 200. When the contact spring 310 is not under pressure, the contacts on the contact spring 310 will not move downward, so as not to contact the working electrode 200. In addition, the longitudinal section of the contact spring 310 is arc-shaped, and the curvature of the middle position of the contact spring 310 is greater than the curvature of the periphery of the contact spring 310. Through such an arrangement, the elasticity of the contact spring 310 is improved, and after the pressure on the spring is removed, the spring can quickly reset.

[0055] In addition, the pressing spring 320 is circular, and the longitudinal section of the pressing spring 320 is arc-shaped. Through such an arrangement, the pressing spring 320 can better press the contact spring 310 downward.

[0056] Referring to Figures 1-8 In the optional solution of the embodiment, the mounting groove 110 is provided with an isolation groove 130, and the isolation groove 130 is located between the two working electrodes 200.

[0057] Specifically, the isolation groove 130 is arranged in the mounting groove 110, and the isolation groove 130 is located between the two working electrodes 200, so as to isolate the two working electrodes 200. When water droplets appear in the base 100, the water droplets can flow into the isolation groove 130. In addition, when a humid environment appears in the base 100, silver migration appears between the two working electrodes 200. It is very difficult for the silver to continue to move forward after migrating into the isolation groove 130. Generally, it is necessary to fill the isolation groove 130 or a large-scale water leakage phenomenon appears in the base 100. Therefore, through the arrangement of the isolation groove 130, the silver migration between the two working electrodes 200 can be reduced or even interrupted.

[0058] The number of the isolation grooves 130 can be multiple, and the extension direction of the isolation grooves 130 is perpendicular to the connection of the two working electrodes 200.

[0059] Referring to Figures 1-8 In the optional solution of the embodiment, the base 100 is covered with a waterproof skin 140, and the top surface of the base 100 is provided with a sealing convex ring 150 abutting against the waterproof skin 140.

[0060] Specifically, the waterproof skin 140 and the sealing convex ring 150 realize the sealing between the base 100 and the upper cover 500.

[0061] The waterproof skin 140 can be made of silicone, latex, etc.

[0062] Referring to Figures 1-8As shown, in the optional solution of the embodiment, the upper cover 500 is provided with a mounting hole, and the button 400 is slidingly and sealingly arranged in the mounting hole.

[0063] Specifically, the button 400 is slidingly and sealingly arranged with the upper cover 500, so as to avoid water leakage between the button 400 and the upper cover 500.

[0064] In the optional solution of the embodiment, the two working electrodes 200 are injection-molded in the base 100.

[0065] Specifically, the two working electrodes 200 can be arranged in the base 100 by injection molding.

[0066] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A novel switch that blocks silver ion migration, characterized in that, The utility model relates to a kind of waterproof keypads, including: Base (100), working electrode (200), elastic sheet piece (300), button (400) and upper cover (500); Mounting groove (110) is set in the base (100), the working electrode (200) is set in the opposite two sides of the base (100), and the contact of the working electrode (200) is located in the mounting groove (110), the contact of the working electrode (200) is located in the opposite two sides in the mounting groove (110) respectively, and the pin of the working electrode (200) is located outside the base (100); Supporting piece (120) is arranged in the mounting groove (110), the supporting piece (120) is located between the working electrode (200), the elastic sheet piece (300) is installed on the supporting piece (120), and the contact of the elastic sheet piece (300) is not contacted with the contact of the working electrode (200) when not being pressed; The upper cover (500) is covered on the base (100), the button (400) is installed on the upper cover (500), and the button (400) can drive the elastic sheet piece (300); Isolation groove (130) is set in the mounting groove (110), and the isolation groove (130) is located between the working electrode (200).

2. The novel switch that blocks silver ion migration according to claim 1, characterized by, The supporting piece (120) includes two support tables (121), and the two support tables (121) are oppositely arranged on the two sides of the mounting groove (110), and the support table (121) and the working electrode (200) are located on different side walls of the mounting groove (110).

3. The novel switch that blocks silver ion migration according to claim 2, characterized by, The number of the isolation groove (130) is multiple, and the extension direction of the isolation groove (130) is perpendicular to the connection of the working electrode (200).

4. The novel switch that blocks silver ion migration according to claim 2, characterized by, The elastic sheet piece (300) includes contact spring (310) and press-down spring (320); The contact spring (310) is arranged on the two support tables (121), and the press-down spring (320) covers the contact spring (310).

5. The novel switch that blocks silver ion migration according to claim 4, characterized by, The contact spring (310) is in cross shape, and the two opposite contacts on the contact spring (310) are arranged on the support table (121) respectively, and the other two opposite contacts can abut against the contact of the working electrode (200). The longitudinal section of the contact spring (310) is in arc shape, and the curvature of the middle position of the contact spring (310) is greater than the curvature of the periphery of the contact spring (310).

6. The novel switch that blocks silver ion migration according to claim 5, characterized by, The press-down spring (320) is in circular shape, and the longitudinal section of the press-down spring (320) is in arc shape.

7. The novel switch that blocks silver ion migration according to any one of claims 1-6, characterized by, The base (100) is covered with waterproof skin (140), and the top surface of the base (100) is provided with sealing convex ring (150) abutting against the waterproof skin (140).

8. The novel switch that blocks silver ion migration according to any one of claims 1-6, characterized by, The upper cover (500) is provided with mounting hole, and the button (400) is slidingly and sealingly arranged in the mounting hole.

9. The novel switch that blocks silver ion migration according to any one of claims 1-6, characterized by, The working electrode (200) is injection-molded in the base (100).

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