Waterproof microswitch with signal filtering function

Abstract

The invention discloses a waterproof microswitch with a signal filtering function. The waterproof microswitch comprises an integrated shell, a pressing spring, a sealing ring, a filter circuit PCB, a base, a glue layer, a sealing ring and an elastic piece. The elastic sheet is arranged at the bottom of the press spring formed by plastic coating; the seal ring is wrapped outside the press spring; the filter circuit PCB is arranged in the plastic-coated base and is sealed in the shell through a glue layer; the sealing ring is fixed to the opening of the shell through hot melting pressing riveting, and static and dynamic double waterproof is achieved. When the pressing spring is pressed, the elastic sheet is in sliding contact with the copper foils at the two sides of the PCB to realize circuit on-off conversion. According to the invention, filtering and waterproof functions are integrated, IP68-level waterproof capability is provided, contact jitter can be effectively inhibited, a signal filtering effect is provided, and the circuit is suitable for digital control and humid environments with high reliability requirements.

Description

Technical Field

[0001] This invention relates to the field of switch technology, and in particular to a waterproof micro switch with signal filtering function. Background Technology

[0002] Currently, as electronic devices continue to evolve towards miniaturization, intelligence, and high reliability, higher demands are being placed on the waterproof performance, anti-interference capabilities, and structural integration of switching components. Traditional microswitches often employ a split-shell design, and their sealing structure frequently relies on a static sealing method with interference fit. This makes it difficult to achieve reliable waterproofing under long-term underwater immersion or dynamic pressing environments, easily leading to internal water ingress and malfunctions. Furthermore, mechanical switches are prone to generating jitter signals when contacts close or open, causing circuit false triggering, which is particularly significant in digital circuits or high-precision control scenarios. Therefore, there is an urgent need for an integrated switch structure that combines excellent waterproof performance with signal filtering capabilities to meet the reliable operation requirements in complex environments. Summary of the Invention

[0003] The purpose of this invention is to provide a switch with better waterproof performance and filtering and debounce function.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A waterproof micro switch with signal filtering function includes an integrated housing and further includes: The push button is a plastic-coated structure with an internal spring sheet for pressing and resetting. The spring is equipped with contact points for switching signals on and off; A sealing ring is wrapped around the outside of the button; The filter circuit PCB has a built-in filter circuit consisting of a resistor and a capacitor connected in series. The base is a plastic-coated structure, with the filter circuit PCB inside. An adhesive layer is disposed below the base to seal the base within the integrated housing; The sealing ring is fixed to the opening of the integrated housing by hot-melt riveting, so that the sealing ring fits tightly with the integrated housing; An elastic element, disposed between the button and the base, is used to provide a restoring force for the button; Pressing the button causes the spring to slide up and down to make contact with the copper foil on both sides of the filter circuit PCB, thereby achieving circuit conduction switching.

[0005] Furthermore, it also includes a handle, which is movably mounted on the upper part of the one-piece housing for applying pressure to the button.

[0006] Furthermore, it also includes electrical wires that are connected to the filter circuit PCB and extend from the bottom of the base.

[0007] Furthermore, two sets of contact copper foils are provided on both sides of the filter circuit PCB. The spring contacts contact the copper foils at different positions during the up-and-down movement, thereby realizing the circuit conversion.

[0008] Furthermore, the elastic element is a spring.

[0009] Furthermore, the base has a groove for mounting the spring, and a spring mounting post is provided in the groove, with the spring sleeved on the spring mounting post.

[0010] Furthermore, the bottom of the push button is also provided with a groove for installing and fixing the spring and a spring mounting post.

[0011] Furthermore, the outer shell of the integrated housing is provided with positioning posts.

[0012] Furthermore, the spring clip consists of a clip with a contact point and a mounting part that mounts and fixes the clip to the button.

[0013] Furthermore, the mounting part includes an annular groove and a positioning groove fitted onto the bottom spring mounting post of the push button.

[0014] This invention integrates a micro switch, a filter circuit, and sealing technology into a single miniature package, achieving excellent sealing performance and suitability for digital circuits. Specifically, the housing is integrally injection molded, with a sealing ring encasing the button. The sealing ring and housing are joined by hot-melt riveting, and the bottom is potted with a special adhesive. The overall sealing performance of the switch achieves IP68 level, meeting the requirements for long-term immersion in water and underwater dynamic operation. The built-in filter circuit PCB is encapsulated in plastic, eliminating and optimizing the problem of false triggering caused by contact bounce in existing mechanical switches, making it suitable for high-precision control scenarios such as digital potentiometers. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the switch of the present invention; Figure 2 This is an exploded view of the switch structure of the present invention; Figure 3 This is a schematic diagram of the switch of the present invention after the outer casing has been removed; Figure 4 This is a schematic diagram of the structure of the spring and the push button of the present invention; Figure 5 This is a schematic diagram of the spring structure of the present invention. Detailed Implementation

[0016] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0017] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] See Figure 1-5 A waterproof micro switch with signal filtering function, comprising: The one-piece housing 1 is made by one-piece injection molding. To facilitate the installation of the housing, several positioning posts 12 are provided on the housing of the one-piece housing 1. The specific number of positioning posts can be selected according to actual needs. In this embodiment, there are 2 posts.

[0020] Button 2 is a plastic-coated structure with an internal spring cover for pressing and resetting. The spring 11 has a contact point 111 for signal connection and disconnection switching; specifically, such as Figure 5As shown, the spring piece 11 consists of a clip 112 with a contact point 111 and a mounting part that mounts and fixes the clip 112 to the button 2. The mounting part includes an annular groove 113 and a positioning groove 114 that are sleeved on the spring mounting post at the bottom of the button.

[0021] Sealing ring 3 is wrapped around the outside of the button 2; The filter circuit PCB4 incorporates a filter circuit consisting of a resistor and a capacitor connected in series. The filter circuit can be selected based on actual needs and is not limited to a resistor-capacitor series filter circuit. Specifically, the filter circuit PCB has two sets of contact copper foils on both sides. The spring contact 11 contacts different positions of the copper foil during its up-and-down movement, thereby achieving circuit switching. The base 5 is a plastic-coated structure, with the filter circuit PCB4 inside.

[0022] The adhesive layer 6 is located below the base 5, sealing the base 5 within the integrated outer shell 1; The sealing ring 7 is fixed to the opening of the integrated housing 1 by hot-melt riveting, so that the sealing ring 3 fits tightly with the integrated housing 1; An elastic element 8 is disposed between the button 2 and the base 5 to provide the restoring force of the button 2; preferably, the elastic element 8 is a spring.

[0023] Pressing the button 2 causes the spring 11 to slide up and down to make contact with the copper foil on both sides of the filter circuit PCB4, thus realizing the conduction switching of the circuit.

[0024] In a preferred embodiment of the present invention, for convenient pressing operation, the switch of the present invention further includes a handle 9, which is movably mounted on the upper part of the integrated housing 1 for applying pressure to the button 2.

[0025] In a preferred embodiment of the present invention, the switch of the present invention further includes a wire 10, which is connected to the filter circuit PCB4 and led out from the bottom of the base.

[0026] In another preferred embodiment of the present invention, the base 5 is provided with a groove 51 for mounting a spring, and a spring mounting post 52 is provided in the groove 51, with the spring sleeved on the spring mounting post 52. Correspondingly, the bottom of the button is also provided with a groove and a spring mounting post for mounting and fixing the spring.

[0027] In summary, the application of the technical solution of the present invention has the following beneficial effects: 1. High integration and simplified structure: By integrating microswitches, filter circuits and multiple sealed structures into a single housing, the miniaturization and modularization of components are achieved, making installation and maintenance easier. 2. Excellent waterproof performance: It adopts multiple sealing processes such as one-piece injection molded shell, sealing ring wrapped around the button, hot melt riveting sealing ring and bottom glue potting to achieve IP68 protection level, which is suitable for long-term underwater immersion and dynamic pressing operation. 3. Strong anti-interference capability: Built-in filter circuit composed of resistors and capacitors effectively suppresses signal noise caused by contact bounce, and improves the signal stability and reliability of the switch in digital circuits and high-precision control scenarios. 4. Sensitive operation and long service life: The one-piece molded spring-coated button structure, combined with the spring reset mechanism, ensures a clear pressing feel, rapid reset, and good structural durability, making it suitable for frequent operation. 5. Wide applicability: Auxiliary structures such as handles and positioning posts can be added as needed to adapt to different installation and operation requirements, expanding the application range of switches in industrial control, outdoor equipment, home appliances and other fields.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A waterproof micro switch having a signal filtering function, comprising an integrated housing, characterized in that, Also include: The press, for plastic structure, internal package elastic sheet, used to press reset; Elastic sheet, provided with contact point, for signal on, off switch; Sealing ring, wrapped in the press outside; Filter circuit PCB, built-in resistance and capacitance in series filter circuit; Base, for plastic structure, internal package filter circuit PCB; Glue layer, set in the lower part of the base, the base is sealed in the integrated shell; Sealing ring, through the hot melt rivet way fixed in the opening of integrated shell, so that the sealing ring and integrated shell closely; Elastic piece, set between the press and the base, for providing the reset force of the press; Press the press to drive the elastic sheet and the filter circuit PCB of both sides of copper foil position up and down sliding contact, realize the switch of circuit.

2. The waterproof micro switch with signal filtering function according to claim 1, characterized in that: Also includes a handle, the handle is movably mounted on the upper part of the integrated shell, for applying pressure to the press.

3. The waterproof micro switch with signal filtering function according to claim 1, characterized in that: Also includes a wire, the wire and filter circuit PCB connected and from the lower part of the base.

4. The waterproof micro switch with signal filtering function according to claim 1, characterized in that: The filter circuit PCB is provided with two groups of contact copper foil on both sides, the elastic sheet in the process of moving up and down respectively contact copper foil in different positions, realize the conversion of circuit.

5. The waterproof micro switch with signal filtering function according to claim 1, characterized in that: The elastic piece is a spring.

6. The waterproof micro switch with signal filtering function according to claim 5, characterized in that: The base is provided with a groove for installing the spring, the spring is installed in the spring mounting column, and the spring is sleeved on the spring mounting column.

7. The waterproof micro switch with signal filtering function according to claim 6, characterized in that: The bottom of the press is also provided with a groove and a spring mounting column for installing and fixing the spring.

8. The waterproof micro switch with signal filtering function according to claim 1, characterized in that: The outer shell of the integrated shell is provided with a positioning column.

9. The waterproof micro switch with signal filtering function according to claim 6, characterized in that: The elastic sheet is composed of a clip with a contact point and a mounting part for mounting and fixing the clip on the press.

10. The waterproof micro switch with signal filtering function according to claim 9, characterized in that: The mounting part includes an annular groove and a positioning groove which are sleeved on the spring mounting column of the bottom of the press. The mounting part includes an annular groove and a positioning groove which are sleeved on the spring mounting column of the bottom of the press.

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