Waterproof micro switch with double sealing ring

Abstract

The utility model discloses a waterproof microswitch with double sealing rings relates to the technical field of light opening device, concretely is a waterproof microswitch with double sealing rings, including upper shell, lower shell, the upper shell, lower shell are equipped with two circles of sealing grooves on the contact surface, and the rubber ring is installed in the sealing groove, and the rubber ring is placed in the sealing groove, and the double waterproof sealing is after the upper shell and lower shell are combined, and the outer surface of rubber ring is smeared with waterproof oil, and the outer surface of rubber ring is smeared with waterproof oil and further improves sealing waterproof performance, the upper shell, lower shell left outer side wall is installed with fixed block no.

Description

Technical Field

[0001] This utility model relates to the field of switch device technology, specifically a waterproof micro switch with double sealing rings. Background Technology

[0002] A micro switch is a contact mechanism with tiny contact intervals and a quick-acting mechanism that performs switching actions with a specified stroke and force. It is covered by a housing and has an external actuator. Although micro switches are not commonly seen in our daily lives, they are found in most electrical appliances, such as computer mice, car mice, automotive electronics, communication equipment, military products, testing instruments, gas water heaters, gas stoves, small household appliances, microwave ovens, rice cookers, medical devices, building automation, power tools, general electrical and wireless equipment, and 24-hour timers. Due to its wide range of applications, the environments in which it is used are also diverse. For example, in humid environments, its internal components are easily damaged. Existing waterproof micro switches are often directly welded together, and if internal parts are damaged, the switch must be replaced, leading to increased costs. Moreover, the effective sealing time of directly welded micro switches is short, and they are easily corroded and leaked in a short time under the corrosive environment of humid environments. To address this, we have proposed a waterproof micro switch with double sealing rings. Utility Model Content

[0003] This invention provides a waterproof micro switch with double sealing rings, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A waterproof micro switch with double sealing rings includes an upper shell 1 and a lower shell 2. The surfaces of the upper shell 1 and the lower shell 2 that come into contact are provided with inner and outer sealing grooves 16. A rubber ring 17 is installed in the sealing groove 16. The outer surface of the rubber ring 17 is coated with waterproof oil. A fixing block 3 is installed on the left outer side wall of both the upper shell 1 and the lower shell 2. A fixing block 4 and a fixing block 5 are installed on the right outer side wall of both the upper shell 1 and the lower shell 2. The upper shell 1 and the lower shell 2 are fastened to the fixing blocks 3, 4, and 5 by bolts, which compress the rubber ring 17.

[0006] Preferably, a buckle 9 is installed at the upper middle of the front and rear outer side walls of the lower shell 2, and a slot is provided at the lower middle of the front and rear outer side walls of the upper shell 1. The buckle 9 and the slot of the upper shell 1 and the lower shell 2 can be used to fasten the upper shell 1 and the lower shell 2.

[0007] Preferably, the lower shell 2 has mounting holes 11 on both sides of the buckle 9, and the lower shell 2 has three pins installed at the left, middle and right sides respectively.

[0008] Preferably, a pressing handle 6 is rotatably connected to the top left side of the upper shell 1, and a button 7 is slidably connected to the right side of the rotatable connection of the pressing handle 6 on the upper shell 1. A rubber sleeve 8 is installed on the upper end of the button 7, and the bottom of the rubber sleeve 8 is fixedly connected to the upper shell 1. When the pressing handle 6 is pressed down, it can contact the top of the button 7 and cause the button 7 to move downward.

[0009] Preferably, a limiting block 14 is installed at the upper right side wall of the lower shell 2 between the fixing block 2 4 and the fixing block 3 5, and a limiting groove 15 is formed at the lower right side wall of the upper shell 1 between the fixing block 2 4 and the fixing block 3 5. The limiting block 14 of the upper shell 1 and the lower shell 2 can be embedded in the limiting groove 15 to limit the lower shell 2.

[0010] Preferably, the first pin 10 passes through the lower shell 2 and is rotatably connected to a contact spring 18 on the upper right side. The top of the middle of the contact spring 18 contacts the bottom of the button 7. A cantilever is installed in the middle of the right side wall of the contact spring 18 and extends to the area between the top of the second pin 12 and the top of the third pin 13. The right end of the cantilever is in contact with the third pin 13 in normal operation.

[0011] Preferably, the top hook of the first pin 10 has a tension spring 19, and the other end of the tension spring 19 is hooked in the middle of the cantilever. A button 7 is provided directly above the middle of the tension spring 19. When the button 7 moves down, it causes the contact spring 18 to press down and make the right end of the cantilever disengage from the third pin 13 and contact the top of the second pin 12 below. When the button 7 is released, the tension spring 19 is reset and straightened, causing the right end of the cantilever to rise and contact the third pin 13.

[0012] Preferably, a clearance groove 20 is provided at the bottom of the middle of the contact spring 18 on the top of the lower shell 2, and the lower end of the middle of the contact spring 18 can be inserted into the clearance groove 20 when pressed down.

[0013] This utility model has the following beneficial effects:

[0014] 1. This waterproof micro switch with double sealing rings has inner and outer sealing grooves on the contact surfaces of the upper and lower shells. Rubber rings are installed in the sealing grooves. By opening sealing grooves on the contact surfaces of the upper and lower shells and placing rubber rings in the sealing grooves, the upper and lower shells are assembled together to achieve double waterproof sealing, protecting the internal parts of the switch. The outer surface of the rubber rings is coated with waterproof oil, which further improves the sealing and waterproof performance and enhances the waterproof effect.

[0015] 2. This waterproof micro switch with double sealing rings has a fixing block 1 installed on the left outer wall of both the upper and lower shells, and a fixing block 2 and a fixing block 3 installed on the right outer wall of both the upper and lower shells. The upper and lower shells are fastened by bolts passing through fixing blocks 1, 2, and 3. The fixing blocks 1, 2, and 3 on both sides of the upper and lower shells form a three-point fastening. The threaded tightening method of the bolts through fixing blocks 1, 2, and 3 enhances the fastening effect. Compared with the existing snap-on fastening, it has a better effect and better sealing performance. At the same time, the threaded tightening of the bolts is less likely to cause the rubber ring to rebound, thereby preventing the upper and lower shells from separating and causing the sealing performance to deteriorate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the limiting structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal sealing structure of this utility model;

[0019] In the diagram: 1. Upper shell; 2. Lower shell; 3. Fixing block one; 4. Fixing block two; 5. Fixing block three; 6. Press handle; 7. Button; 8. Rubber sleeve; 9. Buckle; 10. Pin one; 11. Mounting hole; 12. Pin two; 13. Pin three; 14. Limiting block; 15. Limiting groove; 16. Sealing groove; 17. Rubber ring; 18. Contact spring; 19. Tension spring; 20. Clearance groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 3 This application provides a waterproof micro switch with double sealing rings, including an upper shell 1 and a lower shell 2. The surfaces of the upper shell 1 and the lower shell 2 that come into contact are provided with inner and outer sealing grooves 16. A rubber ring 17 is installed in the sealing groove 16. The outer surface of the rubber ring 17 is coated with waterproof oil. A fixing block 3 is installed on the left outer side wall of the upper shell 1 and the lower shell 2. A fixing block 4 and a fixing block 5 are installed on the right outer side wall of the upper shell 1 and the lower shell 2. The upper shell 1 and the lower shell 2 are fastened to the fixing blocks 3, 4, and 5 by bolts and the fixing blocks 5 are used to compress the rubber ring 17.

[0022] Based on the above, the inner and outer sealing grooves 16 and the rubber ring 17 form a double defense line. When the bolts are tightened, the rubber ring 17 is compressed so that it fits tightly against the sealing groove 16, blocking water penetration. Waterproof oil fills the tiny gap between the rubber ring 17 and the sealing groove 16, further enhancing the sealing effect. Fixing block 1 3, fixing block 2 4, and fixing block 3 5 form a three-point layout. The axial pressure of the bolts makes the upper and lower shells fit evenly. At the same time, the compression of the rubber ring 17 achieves the synergy of sealing and tightening. The waterproof oil model is: Shanghai brand 902 waterproof oil.

[0023] Furthermore, the double-sealed structure offers a higher level of waterproofing compared to the traditional single-sealed structure. It can effectively intercept external moisture and liquids, preventing core components from being damaged by moisture. The waterproof oil extends the aging cycle of the rubber ring 17, solving the problems of short lifespan and inability to repair damage in traditional welded switch seals. The three-point bolt tightening distributes the force evenly, preventing local deformation of the shell and making it less likely for the upper shell 1 and lower shell 2 to separate due to the rebound of the rubber ring 17, thus ensuring long-term sealing and structural stability.

[0024] Please see Figure 1 The upper middle of the front and rear outer side walls of the lower shell 2 is equipped with a buckle 9, and the lower middle of the front and rear outer side walls of the upper shell 1 is provided with a slot. The buckle 9 and the slot of the upper shell 1 and the lower shell 2 can be used to fasten the upper shell 1 and the lower shell 2.

[0025] Based on the above, after the upper and lower shells are pre-positioned by the limiting block 14 and the limiting groove 15, the buckle 9 is elastically inserted into the groove to provide temporary fixed support for subsequent bolt installation and to prevent the upper and lower shells from shifting during the assembly process.

[0026] Furthermore, bolting can be performed without manual handling of the upper and lower shells, significantly improving assembly efficiency. Temporary fixing can further maintain the precise alignment of the upper and lower shells, preventing misalignment of the sealing groove 16 and rubber ring 17 due to shell displacement during bolt installation, thus ensuring the sealing effect.

[0027] Please see Figure 1 The lower shell 2 has mounting holes 11 on both sides of the buckle 9. Inside the lower shell 2, there are three pins installed at the left, middle and right positions respectively: pin one 10, pin two 12 and pin three 13.

[0028] Based on the above, the mounting hole 11 is the fixed interface between the switch and external equipment (such as electrical housing and mechanical parts). The switch can be stably fixed in the target position by passing the bolt through the mounting hole. The first pin 10 provides a rotation fulcrum for the contact spring 18. The second pin 12 (normally open) and the third pin 13 (normally closed) are the core contacts for circuit opening and closing. The fixed positions of the three determine the linkage trajectory and opening and closing accuracy of the contact spring.

[0029] Furthermore, the mounting holes 11 are symmetrically distributed on both sides of the buckle 9, so that the force is evenly distributed when the switch is fixed, and the operation feel is not affected by the installation offset. The three-point pin layout of the left, middle and right is precise, ensuring that the contact spring 18 and the pin have a stable contact and separation trajectory, and improving the reliability of circuit switching.

[0030] Please see Figure 1 A pressing handle 6 is rotatably connected to the top left of the upper shell 1. A button 7 is slidably connected to the right side of the rotatable connection of the pressing handle 6 on the upper shell 1. A rubber sleeve 8 is installed on the upper end of the button 7. The bottom of the rubber sleeve 8 is fixedly connected to the upper shell 1. When the pressing handle 6 is pressed down, it can contact the top of the button 7 and make the button 7 move downward.

[0031] Based on the above, the pressing handle 6 deflects around the rotating axis, converting the pressing force applied by the user into a downward pushing force on the button 7, thereby realizing power transmission. The button 7 moves down along the sliding track of the upper shell, transmitting power to the contact spring 18. The rubber sleeve 8 wraps the sliding gap between the button 7 and the upper shell 1, deforming synchronously with the button, and always preventing moisture from seeping into the interior from the moving gap.

[0032] Furthermore, the lever structure of the press handle 6 reduces the operating force, making it suitable for frequent pressing scenarios, while the rubber sleeve 8 achieves partial sealing without affecting button movement, thus improving overall waterproof reliability.

[0033] Please see Figures 1 to 2 A limiting block 14 is installed at the upper right side wall of the lower shell 2 between the fixing block 2 4 and the fixing block 3 5. A limiting groove 15 is opened at the lower right side wall of the upper shell 1 between the fixing block 2 4 and the fixing block 3 5. The limiting block 14 of the upper shell 1 and the lower shell 2 can be embedded in the limiting groove 15 to limit the lower shell 2.

[0034] Based on the above, the limiting block 14 and the limiting groove 15 are a matching positioning structure. During assembly, the adapter is first inserted to directly lock the relative position of the upper and lower shells, ensuring that the sealing groove 16 and the rubber ring 17, the contact spring 18 and the button 7 are accurately aligned.

[0035] Furthermore, to avoid sealing failure caused by misalignment of the sealing groove 16 and rubber ring 17, and operation jamming or failure of the switch due to misalignment of the contact spring 18 and button 7, the pre-positioning structure simplifies the assembly process, reduces the technical requirements for operators, and improves the consistency of mass production.

[0036] Please see Figures 1 to 3 The first pin 10 passes through the lower shell 2 and is rotatably connected to the contact spring 18 on the upper right side. The top of the middle of the contact spring 18 contacts the bottom of the button 7. A cantilever is installed in the middle of the right side wall of the contact spring 18 and extends to the area between the top of the second pin 12 and the bottom of the third pin 13. The right end of the cantilever is in contact with the third pin 13 in normal operation.

[0037] Based on the above, the contact spring 18 uses the first pin 10 as the pivot point, and its top middle part is in direct contact with the button 7. It can receive the downward pressure transmitted by the button 7. The cantilever extends between the second pin 12 and the third pin 13. Under normal conditions, it is in contact with the third pin 13 (normally closed end) to form a normally closed circuit path.

[0038] Furthermore, the rotation fulcrum of the contact spring 18 is precisely matched with the contact position to ensure that the force transmission is lossless when the button 7 is pressed down, thereby improving the operation sensitivity. The normal contact area between the cantilever and the pin is stable, avoiding poor contact that could lead to circuit disconnection and ensuring the reliability of circuit conduction under normal conditions.

[0039] Please see Figures 1 to 3 The top hook of the first pin 10 has a tension spring 19. The other end of the tension spring 19 is hooked in the middle of the cantilever. A button 7 is located directly above the middle of the tension spring 19. When the button 7 moves down, it causes the contact spring 18 to press down and make the right end of the cantilever disengage from the third pin 13 and contact the top of the second pin 12 below. When the button 7 is released, the tension spring 19 is reset and straightened, causing the right end of the cantilever to rise and contact the third pin 13.

[0040] Based on the above, when button 7 moves down, it pushes the contact spring 18 to deflect around the first pin 10. The cantilever pulls down the tension spring 19 to store elastic potential energy, causing the right end of the cantilever to disengage from the third pin 13 and contact the second pin 12. The circuit switches from normally closed to normally open. After button 7 is released, the tension spring 19 releases its elastic potential energy, pulls the cantilever back to its original position, and the right end of the cantilever re-contacts the third pin 13. The circuit returns to its normally closed state.

[0041] Furthermore, the return force of the tension spring 19 is stable, ensuring that the switch can accurately return to its initial state after each press, avoiding circuit jamming due to reset failure. The mechanical spring achieves state switching, which is more resistant to moisture and corrosion than electronic reset structure, making it suitable for use in harsh environments.

[0042] Please see Figures 1 to 3 A clearance groove 20 is provided at the bottom of the middle of the contact spring 18 on the top of the lower shell 2. The lower end of the middle of the contact spring 18 can be inserted into the clearance groove 20 when pressed down.

[0043] Based on the above, when the contact spring 18 is pressed down and deflected, the lower middle end will move downward along the deflection trajectory. The clearance groove 20 provides it with sufficient room to move, so as to avoid the contact spring 18 from colliding or rubbing with the top of the lower shell 2.

[0044] Furthermore, this addresses the issue of jamming when the contact spring 18 is pressed down, ensuring smooth and unobstructed operation of the button 7, preventing deformation or wear of the contact spring 18 due to impact, extending its service life, and ensuring the stability of the switch's long-term operation.

[0045] In summary, this waterproof micro switch with double sealing rings features two sealing grooves 16 on the contact surfaces of the upper shell 1 and lower shell 2. Rubber rings 17 are installed within these sealing grooves 16. By creating the sealing grooves 16 on the contact surfaces of the upper shell 1 and lower shell 2 and placing the rubber rings 17 within them, a double waterproof seal is achieved after the upper shell 1 and lower shell 2 are assembled, protecting the internal components of the switch. Waterproof oil is applied to the outer surface of the rubber rings 17 to further enhance the sealing and waterproofing performance. Fixing blocks are installed on the left outer side walls of both the upper shell 1 and lower shell 2. 3. Fixing blocks 2 and 3 are installed on the right outer side walls of the upper shell 1 and lower shell 2. The upper shell 1 and lower shell 2 are fastened by bolts passing through fixing blocks 1, 2, 4 and 3. The fixing blocks 1, 2, 4 and 3 on the left and right sides of the upper shell 1 and lower shell 2 form a three-point fastening. The bolts are tightened by threading through fixing blocks 1, 2, 4 and 3. The fastening effect is better than the existing snap-on fastening, and the sealing is better. At the same time, the bolt thread tightening is less likely to cause the rubber ring 17 to rebound, thereby separating the upper shell and lower shell and causing poor sealing.

[0046] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waterproof micro switch with double sealing rings, comprising an upper shell (1) and a lower shell (2), characterized in that: The upper shell (1) and lower shell (2) have two sealing grooves (16) on their contact surfaces. A rubber ring (17) is installed in the sealing groove (16). The outer surface of the rubber ring (17) is coated with waterproof oil. A fixing block 1 (3) is installed on the left outer side wall of the upper shell (1) and lower shell (2). A fixing block 2 (4) and a fixing block 3 (5) are installed on the right outer side wall of the upper shell (1) and lower shell (2). The upper shell (1) and lower shell (2) are fastened and the rubber ring (17) is compressed by bolts passing through the fixing block 1 (3), fixing block 2 (4), and fixing block 3 (5).

2. The waterproof micro switch with double sealing rings according to claim 1, characterized in that: The upper end of the middle of the front and rear outer side walls of the lower shell (2) is equipped with a buckle (9), and the lower end of the middle of the front and rear outer side walls of the upper shell (1) is provided with a slot. The upper shell (1) and the lower shell (2) can be fastened by the buckle (9) and the slot.

3. The waterproof micro switch with double sealing rings according to claim 2, characterized in that: The lower shell (2) has mounting holes (11) on both sides of the buckle (9), and the lower shell (2) has three pins installed at the left, middle and right sides respectively.

4. The waterproof micro switch with double sealing rings according to claim 3, characterized in that: A pressing handle (6) is rotatably connected to the top left of the upper shell (1). A button (7) is slidably connected to the right side of the rotatable connection of the pressing handle (6) on the upper shell (1). A rubber sleeve (8) is installed on the upper end of the button (7). The bottom of the rubber sleeve (8) is fixedly connected to the upper shell (1). When the pressing handle (6) is pressed down, it can contact the top of the button (7) and make the button (7) move downward.

5. The waterproof micro switch with double sealing rings according to claim 4, characterized in that: A limiting block (14) is installed at the upper right side wall of the lower shell (2) between the fixing block 2 (4) and the fixing block 3 (5). A limiting groove (15) is opened at the lower right side wall of the upper shell (1) between the fixing block 2 (4) and the fixing block 3 (5). The limiting block (14) of the upper shell (1) and the lower shell (2) can be embedded in the limiting groove (15) to limit the lower shell (2).

6. The waterproof micro switch with double sealing rings according to claim 5, characterized in that: The first pin (10) passes through the lower shell (2) and is rotatably connected to a contact spring (18) on the upper right side. The top of the middle of the contact spring (18) contacts the button (7) directly below. A cantilever is installed in the middle of the right side wall of the contact spring (18) and extends to the area between the top of the second pin (12) and the top of the third pin (13). The right end of the cantilever is in contact with the third pin (13) under normal conditions.

7. The waterproof micro switch with double sealing rings according to claim 6, characterized in that: The top hook of the first pin (10) has a tension spring (19), and the other end of the tension spring (19) is hooked in the middle of the cantilever. A button (7) is provided directly above the middle of the tension spring (19). When the button (7) moves down, it causes the contact spring (18) to press down and makes the right end of the cantilever disengage from the third pin (13) and contact the top of the second pin (12) below. When the button (7) is released, the tension spring (19) is reset and straightened, so that the right end of the cantilever rises and contacts the third pin (13).

8. The waterproof micro switch with double sealing rings according to claim 7, characterized in that: The lower part of the contact spring (18) is provided with a relief groove (20) at the top of the lower shell (2). The lower end of the middle of the contact spring (18) can be inserted into the relief groove (20) when pressed down.

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