Waterproof touch switch capable of preventing silver ions from creeping

Abstract

A waterproof touch switch capable of preventing silver ions from creeping comprises a base, a metal elastic sheet, an upper seat and a button, a first conductive part and a second conductive part are arranged on the base, the outer ends of the first conductive part and the second conductive part penetrate out of the front end of the base, and the inner ends of the first conductive part and the second conductive part form a center contact and two side contacts in a cavity of the base respectively. The base is further provided with a waterproof pad covering the cavity, the upper surface and the lower surface of the waterproof pad are each provided with a flexible tensile piece, the tensile pieces correspond to a push rod in the center of the bottom of the button, and the center contact is further provided with a first contact part corresponding to the middle of the metal elastic piece. The side contacts are provided with second contact parts used for supporting the metal elastic sheets, and the bottom of the cavity is further provided with a blocking structure matched with the center contact and the side contacts. The side-mounted silver ion shielding cover has the advantages of being long in service life, safer to use and capable of achieving side-mounted installation, and the purpose of blocking silver ion creeping can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of tactile switches, and particularly relates to a waterproof tactile switch for preventing silver ion creepage. Background Art

[0002] A tactile switch is an electronic switch. When in use, gently pressing the switch button can turn on the switch, and when releasing the hand, the switch will turn off. Its internal structure realizes on-off by the elastic movement of a metal elastic sheet. It is mainly applied to fields such as computer chassis, server chassis, household appliances, medical equipment, building automation, vehicle-mounted equipment, digital audio and video, etc. Traditional push-button switches are mostly straight-press switches, which are installed on the front side with the circuit board. This installation method has certain limitations and cannot be installed on the side of the wiring board. In addition, the service life of the waterproof pad of traditional push-button switches is about 100,000 times, and the stressed part will crack under the action of the button, and the service life is not ideal. Moreover, since the contact part between the central contact and the first side contact is relatively close, if the tactile switch is in an environment with heavy water vapor, after the water vapor enters the cavity from the conductive pin, the silver ions at the contact part of the central contact of the tactile switch are likely to migrate to the contact part of the side contact under the energized state, resulting in a short-circuit phenomenon and causing the function of the tactile switch to fail. Content of the Utility Model

[0003] Aiming at the above-mentioned shortcomings of the existing technology, the purpose of the utility model is to provide a waterproof tactile switch for preventing silver ion creepage, which has the characteristics of good service life, safer use, and can realize side installation.

[0004] The technical solution adopted by the utility model to solve its technical problems is that a waterproof tactile switch for preventing silver ion creepage includes a base, a metal elastic sheet, an upper seat, and a button. The base is provided with a first conductive member and a second conductive member. The outer ends of the first conductive member and the second conductive member extend out of the front end of the base, and their inner ends respectively form a central contact and two side contacts in the cavity of the base. The side contacts are distributed on both sides of the central contact. The metal elastic sheet is arranged in the cavity and supported on the side contacts. The upper seat is fixedly installed on the base, and a through hole for the button to slide up and down is provided in the middle. The base is also provided with a waterproof pad covering the cavity. Flexible anti-stretching members are provided on both the upper and lower surfaces of the waterproof pad. The anti-stretching members are arranged corresponding to the push rod at the center of the bottom of the button. A first contact part corresponding to the middle of the metal elastic sheet is also provided on the central contact. Second contact parts for supporting the metal elastic sheet are provided on the side contacts, and a blocking structure for cooperating with the central contact and the side contacts is also provided at the bottom of the cavity.

[0005] Advantages of the above technical solution: by adopting a structure in which the outer ends of the first conductive member and the second conductive member extend out of the front end of the base, the waterproof touch switch can be installed on the upper side of the panel, making the installation of the touch switch more flexible and diverse; by arranging flexible tensile-resistant members at corresponding positions on the upper and lower surfaces of the waterproof pad, when the button moves down and contacts the waterproof pad, most of the force of the button on the waterproof pad will be transferred to the flexible tensile-resistant member, so that the waterproof pad is not easy to break, while ensuring the waterproof effect, the service life of the waterproof touch switch can be greatly improved; by arranging a first contact portion on the center contact and a second contact portion on the side contact, the purpose of stable contact with the metal spring can be achieved, the conductive effect is good, and the blocking structure is set. Even if water vapor enters the interior of the touch switch, the blocking structure will cut off the movement route of the silver ions and prevent the silver ions from migrating between the center contact and the side contact, thereby effectively preventing the occurrence of short circuits, ensuring the function of the touch switch, extending the service life, and making it safer to use.

[0006] Furthermore, the blocking structure includes a first recess and a second recess, the center contact is fitted in the first recess, the second recess is arranged between the side contact and the center contact, and is connected to the first recess on one side, and the depth of the second recess is not less than the depth of the first recess.

[0007] Advantages of adopting the above technical solution: by adopting a structure in which the first recess and the second recess cooperate, the silver ions on the center contact can only migrate to the second recess, and will not migrate to the bottom surface of the cavity, thereby effectively cutting off the movement path of the silver ions and ensuring safety of use. In addition, the above-mentioned design also facilitates the molding of the base, the molding cost will be lower, and the structural design is reasonable.

[0008] Furthermore, a first riveted column is formed at a corner on the upper surface of the base, and the first riveted column is arranged on the outside of the waterproof pad. A third recess is formed at a corresponding position on the upper surface of the upper seat, and a first riveted hole matching the first riveted column is provided in the third recess.

[0009] Advantages of the above technical solution: the base and the upper seat are fixedly connected by riveting, so that the base and the upper seat are not easy to loosen or disassemble, and the connection stability is high. The setting of the third recess reduces the height of the first riveted column, and the strength after riveting is high and the connection is more stable.

[0010] Furthermore, the depth of the third recess is 0.35 mm, and the upper surface of the first rivet column is flush with the upper surface of the third recess.

[0011] Advantages of adopting the above technical solution: By setting the third recess with an appropriate depth and making the upper surface of the first riveting post flush with the upper surface of the third recess, the firmness of the product will be higher after the first riveting post is riveted, and the structural design is reasonable.

[0012] Furthermore, positioning bosses are provided at the corners of the upper surface of the base. The positioning bosses cooperate with the waterproof pad, and the first riveting posts are all formed on the positioning bosses.

[0013] Advantages of adopting the above technical solution: Through the setting of the positioning bosses, the position of the waterproof pad is limited on the base, which is convenient for subsequent assembly. Also, it ensures the stability of the waterproof effect of the tactile switch after the upper seat presses and fixes the waterproof pad. At the same time, by setting the first riveting posts on the positioning bosses, the service strength of the first riveting posts will be higher.

[0014] Furthermore, a support member is fixed on the lower surface of the base. The support member includes a connecting plate and support plates bent and connected to both sides of the connecting plate. The support plates are used to form a support on the panel.

[0015] Advantages of adopting the above technical solution: After the installation methods of the first conductive member and the second conductive member are changed and in cooperation with the support member, the installation stability on the side of the panel is greatly improved, and the structural design is reasonable.

[0016] Furthermore, the support plates are arranged on both outer ends of the first conductive member and the second conductive member. Fixing feet are further provided at the front ends of the support plates, and support feet are provided at the upper ends of the support plates.

[0017] Advantages of adopting the above technical solution: The forming position of the support plates is reasonable. The setting of the fixing feet can be fixed with the jacks on the panel, and the installation of the waterproof tactile switch is more firm. The setting of the support feet increases the contact area of the panel, and the support effect will be better.

[0018] Furthermore, a plurality of second riveting posts are provided on the lower surface of the base, and second riveting holes are provided on the connecting plate to cooperate with the corresponding second riveting posts.

[0019] Advantages of adopting the above technical solution: The base and the support member are also fixedly connected by a riveting method, making the base and the support member not easy to loosen and not easy to disassemble, with high connection stability and reasonable structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 is an exploded schematic diagram of the overall structure of the present utility model;

[0022] Figure 3 Schematic diagram of the base structure of the present utility model;

[0023] Figure 4 Another view of the base structure of the present utility model;

[0024] Figure 5 Schematic diagram of the upper seat structure of the present utility model;

[0025] Figure 6 Schematic diagram of the structures of the first conductive member and the second conductive member of the present utility model;

[0026] Figure 7 Schematic diagram of the support member structure of the present utility model.

[0027] In the figure: 1 - base, 2 - metal elastic sheet, 3 - upper seat, 4 - button, 5 - first conductive member, 6 - second conductive member, 7 - central contact, 8 - side contact, 9 - through hole, 10 - waterproof pad, 11 - anti - stretching member, 12 - first contact portion, 13 - second contact portion, 14 - first concave portion, 15 - second concave portion, 16 - first riveting post, 17 - third concave portion, 18 - first riveting hole, 19 - positioning boss, 20 - support member, 21 - connecting plate, 22 - support plate, 23 - fixing foot, 24 - support foot, 25 - second riveting post, 26 - second riveting hole. Specific embodiments

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model and / or the prior art, the specific embodiments of the present utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings and other embodiments can be obtained. Additionally, the terms related to orientation only represent the relative positional relationship between components, rather than the absolute positional relationship.

[0029] Please refer to Figures 1 to 7As shown in the figure, a waterproof tactile switch that blocks the migration of silver ions includes a base 1, a metal elastic sheet 2, an upper seat 3, and a button 4. The base 1 is provided with a first conductive member 5 and a second conductive member 6. The outer ends of the first conductive member 5 and the second conductive member 6 penetrate to the outside of the front end of the base 1, that is, one end of the first conductive member 5 and the second conductive member 6 will penetrate out from the front end of the base 1. By adopting the structure that the outer ends of the first conductive member 5 and the second conductive member 6 penetrate to the outside of the front end of the base 1, the waterproof tactile switch can be installed on the upper side of the panel, making the installation of the tactile switch more flexible and diverse. The inner end of the first conductive member 5 forms a central contact 7 in the cavity of the base 1, and the inner end of the second conductive member 6 forms two side contacts 8 in the cavity of the base 1. At the same time, the two side contacts 8 are distributed on both sides of the central contact 7. The metal elastic sheet 2 is arranged in the cavity and supported on the side contacts 8. The upper seat 3 is firmly installed on the base 1 and is provided with a through hole 9 in the middle for the button 4 to slide up and down. A waterproof pad 10 covering the cavity is also provided on the base 1. By setting the waterproof pad 10, water vapor can be effectively prevented from invading the cavity from the connection between the base 1 and the upper seat 3 and the through hole 9, ensuring the safety of product use.

[0030] Flexible anti-tensile members 11 are provided on both the upper and lower surfaces of the waterproof pad 10. The anti-tensile members 11 are arranged corresponding to the push rod at the bottom center of the button 4. The anti-tensile members 11 can be mylar glue. Mylar tape can withstand high tensile forces and is not easy to break. At the same time, it has good waterproof and moisture-proof performance and is not easy to get damp and soften. By setting flexible anti-tensile members 11 at the corresponding positions on the upper and lower surfaces of the waterproof pad 10, when the button 4 moves down and touches the waterproof pad 10, most of the force of the button 4 on the waterproof pad 10 will be transferred to the flexible anti-tensile members 11, so that the waterproof pad 10 is not easy to break. While ensuring the waterproof effect, the service life of the waterproof tactile switch can be greatly improved.

[0031] In this embodiment, a first contact portion 12 corresponding to the middle part of the metal elastic sheet 2 is further provided on the central contact 7, and second contact portions 13 for supporting the metal elastic sheet 2 are provided on both side contacts 8. It should be noted that the metal elastic sheet 2 is arched, the side contacts 8 contact the bottom of the peripheral edge of the metal elastic sheet 2, and before the button 4 moves down in place, the central contact 7 does not contact the middle part of the metal elastic sheet 2. By providing the first contact portion 12 on the central contact 7 and the second contact portions 13 on the side contacts 8, the purpose of stable contact with the metal elastic sheet 2 is achieved.

[0032] In this embodiment, a blocking structure for cooperating with the central contact 7 and the side contacts 8 is further provided at the bottom of the cavity. The setting of the blocking structure, even when water vapor enters the inside of the tactile switch, the blocking structure will cut off the movement route of silver ions and prevent the migration of silver ions between the central contact 7 and the side contacts 8, thus effectively preventing the occurrence of short-circuit phenomena, ensuring the function of the tactile switch, prolonging the service life, and making it safer to use.

[0033] In this embodiment, the blocking structure includes a first recess 14 and a second recess 15. The central contact 7 is fitted in the first recess 14, and the second recess 15 is provided between the side contact 8 and the central contact 7. That is to say, there are two second recesses 15, and both sides of the second recess 15 are connected to the first recess 14, and the depth of the second recess 15 is not less than the depth of the first recess 14. By adopting the structure of the cooperation between the first recess 14 and the second recess 15, the silver ions on the central contact 7 can only migrate into the second recess 15 and will not migrate to the bottom surface of the cavity, thus effectively cutting off the movement route of the silver ions, ensuring the safety of use. And with the above design method, the molding of the base 1 is convenient, the molding cost is also low, and the structural design is reasonable.

[0034] In this embodiment, a first riveting post 16 is formed at the corner of the upper surface of the base 1, and the first riveting post 16 is arranged outside the waterproof pad 10. A third recess 17 is formed at the corresponding position on the upper surface of the upper seat 3, and a first riveting hole 18 for fitting the first riveting post 16 is provided in the third recess 17. By providing the matching first riveting post 16 and the first riveting hole 18, the base 1 and the upper seat 3 are fixedly connected by riveting, so that the base 1 and the upper seat 3 are not easy to loosen and are not easy to disassemble, and the connection stability is high. And the setting of the third recess 17 reduces the height of the first riveting post 16, and the firmness after riveting is high and the connection is more stable.

[0035] In this embodiment, the depth of the third recess 17 is 0.35 mm, and the upper surface of the first riveting post 16 is flush with the upper surface of the third recess 17. By setting the third recess 17 with an appropriate depth and making the upper surface of the first riveting post 16 flush with the upper surface of the third recess 17, the firmness of the product will be higher after the first riveting post 16 is riveted, and the structural design is reasonable.

[0036] In this embodiment, positioning bosses 19 are also provided at the corners of the upper surface of the base 1. The positioning bosses 19 cooperate with the waterproof pad 10, and the first riveting posts 16 are all formed on the positioning bosses 19. Through the setting of the positioning bosses 19, the position of the waterproof pad 10 is limited on the base 1, which is convenient for subsequent assembly, and also ensures the stability of the waterproof effect of the tactile switch after the upper seat 3 presses and fixes the waterproof pad 10. At the same time, the first riveting posts 16 are arranged on the positioning bosses, so that the use strength of the first riveting posts 16 will be higher.

[0037] In this embodiment, a support member 20 is fixed on the lower surface of the base 1. The support member 20 includes a connecting plate 21 and support plates 22 bent and connected to both sides of the connecting plate 21. The support plates 22 are used to form a support on the panel. After the installation methods of the first conductive member 5 and the second conductive member 6 are changed and in cooperation with the support member 20, the installation stability on the side of the panel is greatly improved, and the structural design is reasonable.

[0038] In this embodiment, the support plates 22 are arranged on both sides of the outer ends of the first conductive member 5 and the second conductive member 6. A fixing foot 23 is further provided at the front end of the support plate 22, and a support foot 24 is further provided at the upper end of the support plate 22. The forming position of the support plate 22 is reasonable. The setting of the fixing foot 23 can be fixed with the jack on the panel, and the installation of the waterproof tactile switch is more firm. The setting of the support foot 24 increases the contact area of the panel, and the support effect will be better.

[0039] In this embodiment, a plurality of second riveting posts 25 are provided on the lower surface of the base 1, and second riveting holes 26 for cooperating with the corresponding second riveting posts 25 are provided on the connecting plate 21. The base 1 and the support member 20 are also fixedly connected by a riveting method, so that the base 1 and the support member 20 are not easily loosened and not easily disassembled, the connection stability is high, and the structural design is reasonable.

[0040] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A waterproof tactile switch for blocking the migration of silver ions, comprising a base (1), a metal elastic sheet (2), an upper seat (3), and a button (4). A first conductive member (5) and a second conductive member (6) are provided on the base (1). The outer ends of the first conductive member (5) and the second conductive member (6) extend out of the front end of the base (1), and their inner ends respectively form a central contact (7) and two side contacts (8) in the cavity of the base (1). The side contacts (8) are distributed on both sides of the central contact (7). The metal elastic sheet (2) is arranged in the cavity and supported on the side contacts (8). The upper seat (3) is fixedly installed on the base (1), and a through hole (9) for the button (4) to slide up and down is provided through the middle. A waterproof pad (10) covering the cavity is further provided on the base (1), and it is characterized in that: Flexible tensile-resistant members (11) are provided on both the upper and lower surfaces of the waterproof pad (10). The tensile-resistant members (11) are arranged corresponding to the push rod at the bottom center of the button (4). A first contact portion (12) corresponding to the middle of the metal elastic sheet (2) is further provided on the central contact (7). Second contact portions (13) for supporting the metal elastic sheet (2) are provided on the side contacts (8). A blocking structure for cooperating with the central contact (7) and the side contacts (8) is further provided at the bottom of the cavity.

2. The waterproof tactile switch for blocking the migration of silver ions according to claim 1, wherein: The blocking structure includes a first recess (14) and a second recess (15). The central contact (7) is fitted in the first recess (14). The second recess (15) is provided between the side contact (8) and the central contact (7), and one side of each of them is connected to the first recess (14). The depth of the second recess (15) is not less than the depth of the first recess (14).

3. The waterproof tactile switch for blocking silver ion migration according to claim 1, wherein: First riveting posts (16) are formed at the corners of the upper surface of the base (1). The first riveting posts (16) are arranged outside the waterproof pad (10). A third recess (17) is formed at the corresponding position on the upper surface of the upper seat (3). A first riveting hole (18) for cooperating with the first riveting post (16) is provided in the third recess (17).

4. The waterproof tactile switch for blocking silver ion migration according to claim 3, characterized in that: The depth of the third recess (17) is 0.35 mm, and the upper surface of the first riveting post (16) is flush with the upper surface of the third recess (17).

5. The waterproof tactile switch for blocking the silver ion migration according to claim 4, wherein: Positioning bosses (19) are further provided at the corners of the upper surface of the base (1). The positioning bosses (19) cooperate with the waterproof pad (10), and the first riveting posts (16) are all formed on the positioning bosses (19).

6. The waterproof tactile switch for blocking silver ion migration according to claim 1, wherein: A support member (20) is fixed on the lower surface of the base (1). The support member (20) includes a connecting plate (21) and support plates (22) bent and connected to both sides of the connecting plate (21). The support plates (22) are used for forming a support on the panel.

7. The waterproof tactile switch for blocking silver ion migration according to claim 6, wherein: The support plates (22) are arranged on both outer ends of the first conductive member (5) and the second conductive member (6). Fixing feet (23) are further provided at the front ends of the support plates (22), and support feet (24) are further provided at the upper ends of the support plates (22).

8. A waterproof tactile switch for blocking silver ion migration according to claim 7, characterized in that: A plurality of second riveting posts (25) are provided on the lower surface of the base (1). Second riveting holes (26) for cooperating with the corresponding second riveting posts (25) are provided on the connecting plate (21).

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