Fully-wrapped waterproof microswitch
By placing a sealing cap at the through hole of the rubber shell of the micro switch and ensuring that the sealing cap is clamped with the extended end, the problem of poor sealing effect of the existing micro switch is solved, and better waterproof and dustproof effect and safe use are achieved.
Patent Information
- Application Number
- CN202421360091.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-14
AI Technical Summary
The existing micro switch has poor sealing effect between the sealing cap and the press, which may cause short circuits in the micro switch and cannot be used safely.
A fully-inclusive waterproof micro switch is designed. By placing a sealing cap in the through hole of the rubber shell, and the fixing part of the sealing cap is embedded in the fixing groove, ensuring that the sealing cap is clamped with the extended end, thereby achieving a full-inclusive seal.
It effectively improves the waterproof and dustproof effect of the micro switch, ensuring that when pressing back and forth, there will be no sealing between the seal cap and the press, thereby avoiding short circuits and ensuring the safe use of the micro switch.
Smart Images
Figure CN222672851U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of micro switches, in particular to a fully enclosed waterproof micro switch. Background Art
[0002] A micro switch is a switch with a small contact spacing and a snap-action mechanism. It uses a specified stroke and a specified force to perform a switch action. It is covered with a shell and has a drive rod on the outside. Because the contact spacing of the switch is relatively small, it is called a micro switch, also known as a sensitive switch. Micro switches are widely used in electronic equipment, instrumentation, mining, power systems, household appliances, electrical equipment, as well as aerospace, aviation, ships and other fields.
[0003] Due to the wide application of micro switches, it is necessary to carry out waterproof and dustproof treatment on the micro switches. The micro switches generally include a housing, a base, a button and a switching element. The base is connected to the bottom of the housing, and the button runs through the top of the housing. Therefore, it is necessary to seal the base, the bottom of the housing, and the penetration of the button. However, in the prior art, when sealing the penetration of the button, a sealing cap is used for sealing. One end of the sealing cap is tightly connected to the plastic shell, and the other end is clamped on the button. However, the micro switch needs to press the button during operation, and when the button is pressed back and forth, the sealing cap may not be able to seal with the button, resulting in poor sealing effect of this sealing setting, which in turn causes a short circuit in the micro switch, making the micro switch unsafe to use. Utility Model Content
[0004] The utility model aims to provide a fully enclosed waterproof micro switch with reasonable structural design and better waterproof and dustproof effect.
[0005] In order to solve the above technical problems, the present invention can be implemented by adopting the following technical solutions:
[0006] A fully enclosed waterproof micro switch, comprising a plastic shell, a base, a switching element group, a button and a sealing cap, wherein one end of the plastic shell has an opening and the other end has a through hole, and the base sealing cover is arranged at the opening of the plastic shell, thereby forming a closed accommodating cavity inside the plastic shell;
[0007] The switching element group is installed in the accommodating cavity and has a conductive terminal connected to the base, one end of which passes through the base and extends outward;
[0008] One end of the button is placed in the accommodating cavity to cooperate with the switching element group, and the other end passes out of the through hole to form an extended end. The sealing cap is arranged at the through hole and wraps the extended end of the button.
[0009] In one embodiment, an annular convex edge is provided on the outer periphery of the through hole, a fixing groove is formed between the annular convex edge and the through hole, a fixing portion is provided at the bottom of the sealing cap, and the fixing portion is embedded in the fixing groove so that the sealing cap cover is arranged on the through hole.
[0010] In one embodiment, a limiting groove is provided at the extended end of the button, and a limiting portion is provided on the inner wall of the sealing cap. The limiting portion is inserted into the limiting groove so that the sealing cap is engaged with the extended end of the button.
[0011] In one of the embodiments, the fixing portion is hermetically connected in the fixing groove by a heat riveting process.
[0012] In one embodiment, the conductive terminal is molded on the base using a molding process.
[0013] In one embodiment, a slot is provided on the inner wall of the plastic shell, and a clamping block is provided on the side wall of the base. The clamping block is inserted into the slot to cover and connect the base with the plastic shell.
[0014] In one embodiment, the joint between the base and the plastic shell can be filled with sealant, or a sealing ring can be provided, or heat riveted, or laser welded, or ultrasonically welded.
[0015] In one of the embodiments, a handle for pressing the sealing cap and the button is further provided on the plastic shell.
[0016] In one embodiment, the sealing cap is made of silicone, TPE, TPU, TPS or rubber. Beneficial Effects
[0017] The utility model discloses a fully-inclusive waterproof micro switch, in which the base and the plastic shell are hermetically covered. The sealing method can be adopted by filling sealant at the covering part, or setting a sealing ring, or adopting laser welding, or ultrasonic welding. The bottom of the micro switch can be sealed by the above-mentioned sealing method. At the same time, a sealing cap is provided at the through hole of the plastic shell, and the sealing cap wraps the push-pin. The sealing of the top of the micro switch can be achieved by covering the sealing cap, and the push-pin is wrapped by the sealing cap, so that the fully-inclusive sealing of the push-pin can be achieved, so that the structural design between the push-pin and the sealing cap is reasonable, and when the push-pin is reciprocatedly pressed, there will be no situation that the sealing cannot be achieved between the sealing cap, thereby ensuring the sealing of the top of the micro switch and improving the overall waterproof and dustproof effect of the micro switch. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is an exploded schematic diagram of the utility model's all-inclusive waterproof micro switch;
[0019] Figure 2 It is a cross-sectional view of the fully enclosed waterproof micro switch of the utility model;
[0020] Figure 3 This is a schematic diagram of the plastic shell structure of the fully enclosed waterproof micro switch of the utility model;
[0021] Figure 4 This is a cross-sectional view of the plastic shell of the fully enclosed waterproof micro switch of the utility model;
[0022] Figure 5 This is a schematic diagram of the push-button structure of the fully enclosed waterproof micro switch of the utility model;
[0023] Figure 6 It is a cross-sectional view of the sealing cap of the fully enclosed waterproof micro switch of the utility model.
[0024] As shown in the attached figure:
[0025] 100, plastic shell; 110, through hole; 120, annular convex edge; 130, fixing groove; 140, clamping groove;
[0026] 200, base; 210, clamping block;
[0027] 300, switching element group; 310, conductive terminal;
[0028] 400, button; 410, limit slot;
[0029] 500, sealing cap; 510, fixing portion; 520, limiting portion;
[0030] 600, sealant;
[0031] 700. Handle. DETAILED DESCRIPTION
[0032] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only."
[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0035] See also Figures 1 to 4 A fully enclosed waterproof micro switch includes a plastic shell 100, a base 200, a switching element group 300, a button 400 and a sealing cap 500. The plastic shell 100 has an opening at one end and a through hole 110 at the other end. The base 200 is covered on the opening to form a receiving cavity inside the plastic shell 100, and a sealant 600 is filled at the covering part of the base 200. The switching element group 300 is installed in the receiving cavity and has a conductive terminal 310 connected to the base 200, and one end of the conductive terminal 310 passes through the base 200 and extends outward. One end of the button 400 is placed in the receiving cavity to cooperate with the switching element group 300, and the other end passes out from the through hole 110 to form an extended end. The sealing cap 500 is covered at the through hole 110 and wraps the extended end of the button 400.
[0036] Specifically, in this embodiment, the base 200 is covered with the opening of the plastic shell 100, and after covering, the sealing glue 600 is filled in the covering part, and the sealing of the bottom of the micro switch can be achieved by the sealing glue 600. At the same time, the switching element group 300 is arranged in the accommodating cavity inside the plastic shell 100, and the conductive terminal 310 of the switching element group 300 is connected to the base 200. Since the conductive terminal 310 needs to be connected to the external wire, one end of the conductive terminal 310 will penetrate the base 200 and extend outward, and In order to ensure the sealing between the conductive terminal 310 and the base 200, the conductive terminal 310 is encapsulated on the base 200 by a molding process. The molding process can achieve the sealing between the conductive terminal 310 and the base 200, so that the bottom of the micro switch is fully sealed. In addition, when the external wire is connected to the conductive terminal 310, the connection between the wire and the conductive terminal 310 can also be sealed by filling the sealant 600, so that the micro switch can achieve a sealed electrical connection when used in different occasions.
[0037] Of course, in this embodiment, a sealing ring (not shown in the figure) can also be provided at the covering portion of the base 200 and the plastic shell 100. The sealing ring can also realize a closed connection between the base 200 and the plastic shell 100, thereby making the bottom of the micro switch sealed against water and dust. The method of providing the sealing ring is a prior art, so it will not be described in detail here.
[0038] Furthermore, after the base 200 and the plastic shell 100 are covered, they can also be connected tightly to the plastic shell 100 by heat riveting or welding. The welding method can be laser welding or ultrasonic welding. The base 200 and the plastic shell 100 are tightly bonded together by welding, thereby achieving the sealing of the bottom of the micro switch, thereby improving the waterproof and dustproof effect of the micro switch; and the sealing between the base 200 and the plastic shell 100 is not limited to filling sealant 600, setting a sealing ring or laser / ultrasonic welding, and other sealing methods can also be used, as long as the sealing between the base 200 and the plastic shell 100 is achieved.
[0039] In order to realize the switching function of the micro switch, one end of the button 400 is placed in the accommodating cavity of the plastic shell 100 to cooperate with the switching element group 300, and the other end of the button 400 is passed outward from the through hole 110 to form an extended end. In order to seal the through hole 110, in this embodiment, a sealing cap 500 is covered at the through hole 110, and after the sealing cap 500 is covered, the extended end of the button 400 will be completely wrapped. The sealing of the top of the micro switch is achieved by covering the sealing cap 400, and the full sealing method of the button 400 is adopted, so that when the button 400 is pressed back and forth, there will be no situation where it cannot be sealed with the sealing cap 500, thereby ensuring the sealing of the top of the micro switch. Finally, the sealing structure design of the micro switch is reasonable, and the overall waterproof and dustproof effect of the micro switch can be improved.
[0040] Also, see Figure 1 and Figure 4 In order to cover the base 200 and the plastic shell 100, in this embodiment, a card groove 140 is provided on the inner wall of the plastic shell 100, and a card block 210 is provided on the side wall of the base 200. When covering, the card block 210 on the side wall of the base 200 is directly inserted into the card groove 140 on the inner wall of the plastic shell 100, so that the base 200 and the plastic shell 100 can be covered and connected. After the base 200 and the plastic shell 100 are covered, the sealing glue 600 is filled in the covering position to achieve the sealing between the base 200 and the plastic shell 100.
[0041] See also Figures 3 to 6In this embodiment, in order to cover the sealing cap 500 at the through hole 110 and wrap the extended end of the button 400, an annular convex edge 120 is provided on the outer periphery of the through hole 110, and a fixing groove 130 is formed between the annular convex edge 120 and the through hole 110. At the same time, a fixing portion 510 is provided at the bottom of the sealing cap 500. When the sealing cap 500 is covered, the fixing portion 510 of the sealing cap 500 is embedded in the fixing groove 130 at the top of the plastic shell 100, thereby realizing the fixed assembly of the sealing cap 500 and making the sealing cap 500 cover the through hole 110.
[0042] The top of the fixing portion 510 of the sealing cap 500 can be limited by the annular ridge 120, and the fixing portion 510 of the sealing cap 500 can be riveted into the fixing groove 130 by a hot riveting process. The annular ridge 120 and the hot riveting process can make the fixing portion 510 of the sealing cap 500 more stable and firm after being embedded in the fixing groove 130, thereby ensuring that the sealing cap 500 seals the through hole 110.
[0043] When the button 400 is pressed back and forth, the sealing cap 500 will also follow the button 400. In order to ensure that the sealing cap 500 cooperates with the button 400 and fully wraps it, a limiting groove 410 is set at the extended end of the button 400, and a limiting portion 520 is set on the inner wall of the sealing cap 500. When the sealing cap 500 is covered on the through hole 110, the limiting portion 520 of the sealing cap 500 is inserted into the limiting groove 410 at the extended end of the button 400, so that the sealing cap 500 and the extended end of the button 400 can be clamped. Through the clamping, the sealing cap 500 and the button 400 can be better matched, the sealing cap 500 can follow the button 400, and the sealing cap 500 can better wrap the extended end of the button 400.
[0044] Of course, since the sealing cap 500 will deform when pressed, the sealing cap 500 in this embodiment can be made of silicone, TPE, TPU, TPS or rubber material. Specifically, one of the materials can be selected according to actual needs and can be injection molded.
[0045] Finally, see Figure 1 or Figure 2 In order to facilitate pressing the button 400 and realize the signal switching function of the micro switch, a handle 700 for pressing the sealing cap 500 and the button 400 is further provided on the plastic shell 100. The sealing cap 500 and the button 400 are pressed simultaneously by the handle 700, thereby ensuring the pressing feel of the micro switch.
[0046] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Any technician in the industry can smoothly implement the utility model according to the drawings shown in the specification and the above description; however, any equivalent changes, modifications and evolutions made by any technician familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the scope of protection of the technical solution of the utility model.
Claims
1. A fully enclosed waterproof micro switch, characterized in that: It includes a plastic shell, a base, a switching element group, a button and a sealing cap. One end of the plastic shell has an opening, and the other end has a through hole. The base sealing cover is arranged at the opening of the plastic shell, so that a closed accommodating cavity is formed inside the plastic shell. The switching element group is installed in the accommodating cavity and has a conductive terminal connected to the base, one end of which passes through the base and extends outward; One end of the button is placed in the accommodating cavity to cooperate with the switching element group, and the other end passes out of the through hole to form an extended end. The sealing cap is arranged at the through hole and wraps the extended end of the button.
2. The all-inclusive waterproof micro switch according to claim 1, characterized in that: The outer periphery of the through hole is provided with an annular convex edge, a fixing groove is formed between the annular convex edge and the through hole, a fixing part is provided at the bottom of the sealing cap, and the fixing part is embedded in the fixing groove so that the sealing cap cover is arranged on the through hole.
3. The all-inclusive waterproof micro switch according to claim 1, characterized in that: The extended end of the button is provided with a limiting groove, and the inner wall of the sealing cap is provided with a limiting portion, and the limiting portion is inserted into the limiting groove so that the sealing cap is clamped with the extended end of the button.
4. The all-inclusive waterproof micro switch according to claim 2, characterized in that: The fixing part is hermetically connected in the fixing groove by adopting a hot riveting process.
5. The all-inclusive waterproof micro switch according to claim 1, characterized in that: The conductive terminal is molded on the base by using a molding process.
6. The all-inclusive waterproof micro switch according to claim 1, characterized in that: The inner wall of the plastic shell is provided with a card slot, and the side wall of the base is provided with a card block, and the card block is inserted into the card slot to cover and connect the base with the plastic shell.
7. The all-inclusive waterproof micro switch according to claim 1, characterized in that: The joint between the base and the plastic shell can be filled with sealant, or provided with a sealing ring, or heat-riveted, or laser-welded, or ultrasonically welded.
8. The all-inclusive waterproof micro switch according to claim 1, characterized in that: The plastic shell is also provided with a handle for pressing the sealing cap and the button.
9. The all-inclusive waterproof micro switch according to claim 1, characterized in that: The sealing cap is made of silicone, TPE, TPU, TPS or rubber.