Waterproof microswitch

Abstract

The invention relates to a waterproof microswitch, and relates to the technical field of microswitches, the waterproof microswitch comprises a base and a base cover installed on the base, the base is fixedly provided with a first conductive sheet, a second conductive sheet and a third conductive sheet, and the first conductive sheet is provided with a connection sheet; a control piece and a button for extruding the control piece are arranged on the base cover; the button comprises an extrusion portion located in the base cover and a protruding rod fixed to one side of the extrusion portion, a limiting hole is formed in the base cover, the periphery, extending to the outside, of the protruding rod is sleeved with an elastic sealing sleeve, and the two ends of the sealing sleeve are fixedly provided with an upper turned edge bent inwards and a lower turned edge bent outwards respectively. A sealing ring groove is formed in the periphery of the protruding rod, a limiting sinking groove is formed in the edge of an opening in the outer side of the limiting hole, and a fixing ring abutting against the lower flanging is fixedly arranged in the limiting sinking groove. According to the invention, the possibility that external water vapor or other impurities enter the base cover is reduced, and the waterproof performance of the base cover is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of micro switches, and in particular to a waterproof micro switch. Background Art

[0002] As a small and efficient electronic control component, micro switches have a wide range of applications, covering multiple key areas from electronic equipment to mechanical equipment, automobiles and home appliances. In electronic equipment, micro switches are commonly found in input devices such as keyboards, mice and remote controls, accurately realizing key trigger functions and providing users with a smooth interactive experience. In the field of mechanical equipment, micro switches are more often used in control links such as limit, counting and positioning to ensure the accuracy and stability of mechanical operation.

[0003] The traditional micro switch design usually includes a housing and a housing cover fixed by screws, and key components such as a push rod, a spring, a moving contact piece, and a stationary contact piece are arranged inside. When the push rod is subjected to external pressure or mechanical force, the spring will deform, and then the moving contact on the moving contact piece will contact or separate with the stationary contact on the stationary contact piece, thereby changing the circuit state and realizing switch control.

[0004] However, this design has obvious defects in humid environments. Since there is often a certain gap between the push rod and the shell, external moisture can easily penetrate into the shell through these gaps, posing a potential threat to the internal components. Long-term humid environment may cause components to rust, thereby affecting the contact performance of the moving contact and the static contact. In extreme cases, it may even cause poor contact or short circuit between the contacts, which seriously affects the reliability and service life of the micro switch. There is room for improvement. Summary of the invention

[0005] The purpose of the present application is to provide a waterproof micro switch to solve the problem in the above-mentioned related art that external moisture may penetrate through the gap between the push rod and the housing, affecting the performance and life of the micro switch.

[0006] The present application provides a waterproof micro switch adopting the following technical solution: A waterproof micro switch, comprising a base, a base cover mounted on the base, the base being fixedly provided with a first conductive sheet, a second conductive sheet and a third conductive sheet, the first conductive sheet being provided with a connecting sheet; the base cover being provided with a control member for controlling the rotation of the connecting sheet and a button for squeezing the control member, the button being able to squeeze the control member when pressed, thereby driving the connecting sheet to abut against the second conductive sheet or the third conductive sheet; the button comprising an extrusion portion located in the base cover, a convex rod fixed to one side of the extrusion portion, the base cover being provided with a limiting hole for the convex rod to pass through and extend to the outside, an elastic sealing sleeve being sleeved on the outer periphery of the convex rod extending to the outside, an upper flange bent inwardly and a lower flange bent outwardly being fixedly provided at both ends of the sealing sleeve respectively; a sealing ring groove for the upper flange to be clamped and pressed against is provided on the outer periphery of the convex rod, a limiting recessed groove for the lower flange to be clamped and pressed against is provided on the outer opening edge of the limiting hole, and a fixing ring for pressing against the lower flange is fixed in the limiting recessed groove.

[0007] By adopting the above technical solution, when the micro switch is used in a humid environment, due to the application setting of the sealing sleeve, the upper flange on the sealing sleeve is tightly pressed against the inner wall of the sealing ring groove on the protruding rod, and the lower flange is tightly pressed and fixed against the bottom side of the limiting groove, thereby reducing the possibility of external water vapor or other impurities entering the base cover, thereby enhancing its waterproof performance.

[0008] Optionally, a second contact is fixedly provided on the second conductive sheet, and a third contact located directly below the first contact is fixedly provided on the third conductive sheet; a first contact located between the second contact and the third contact is fixedly provided on the side of the connecting sheet away from the first conductive sheet.

[0009] By adopting the above technical solution, due to the combined arrangement of the first contact, the second contact and the third contact, the stability of the first conductive sheet and the second conductive sheet, and the first conductive sheet and the third conductive sheet when they are in abutment and conducting is improved, thereby enhancing the performance of the micro switch.

[0010] Optionally, a first support block for supporting the second conductive sheet and a second support block for supporting the third conductive sheet are fixedly disposed on the base.

[0011] By adopting the above technical solution, due to the installation arrangement of the first supporting block and the second supporting block, the second conductive sheet and the third conductive sheet are supported, thereby improving the installation stability of the first conductive sheet and the second conductive sheet.

[0012] Optionally, a first support plate and a second support plate for supporting the control member and the connecting plate are fixed side by side on the first conductive sheet, and the second support plate is located close to the second conductive sheet.

[0013] By adopting the above technical solution, due to the combined arrangement of the first support plate and the second support plate on the first conductive sheet, it is convenient to support the control member and the connecting sheet in the subsequent process, thereby improving the assembly efficiency of the micro switch.

[0014] Optionally, two connecting feet are relatively fixed on one side of the connecting piece, and a first rotating groove for the connecting foot to be inserted and rotated is provided on the side of the second support plate away from the first support plate; the control member is a tension spring in a stretched state, and the two ends of the tension spring are respectively fixedly connected to the first support plate and the connecting piece, and a clearance gap for the tension spring to pass through is provided on the second support plate, and one side of the connecting piece abuts against the second conductive piece when the button is not pressed, and rotates downward and abuts against the third conductive piece after the button is pressed.

[0015] By adopting the above technical solution, due to the installation setting of the tension spring, when the button is not pressed under normal circumstances, under the action of the tension spring, the edge of the side of the connecting piece away from the second support plate abuts against the second conductive piece; after the user presses the button, the tension spring moves downward as a whole, and drives the connecting piece to rotate in the direction close to the third conductive piece, so that the connecting piece abuts against the third conductive piece.

[0016] Optionally, a limiting protrusion is fixedly provided on the side edges of the two connecting legs that are away from each other, and a limiting notch for the limiting protrusion to be inserted and rotated is formed on the two opposite side surfaces of the second support plate.

[0017] By adopting the above technical solution, due to the combined setting of the limiting protrusion and the limiting notch, during the installation process of the connecting piece, the limiting protrusion is inserted into the limiting notch on the second support plate, thereby reducing the possibility of the connecting piece falling off when the micro switch is turned on, and improving the assembly stability of the connecting piece and the second support plate.

[0018] Optionally, the connecting plate is provided with a first through hole for the first support plate to pass through, and a second through hole for the second support plate to pass through, and the control member is a spring sheet located in the second through hole and in a bent state; a second rotation groove is provided on the side of the second support plate away from the first support plate, and a third rotation groove is provided on the side of the first support plate away from the second support plate; the spring sheet is located on the side of the second support plate away from the first support plate, one side of the spring sheet is snapped into the second rotation groove, and the other side of the spring sheet is snapped and fixed to the inner edge of the second through hole away from the first support plate; the inner edge of the first through hole away from the second support plate is snapped into the third rotation groove.

[0019] By adopting the above technical solution, due to the application setting of the spring sheet and the connecting sheet, when the button is not pressed under normal circumstances, under the action of the spring sheet, one side of the connecting sheet abuts against the second conductive sheet, so that the first conductive sheet is connected to the second conductive sheet; when the button is pressed, the connecting sheet rotates as a whole in the direction close to the third conductive sheet, so that one side of the connecting sheet abuts against the third conductive sheet, and the first conductive sheet is connected to the third conductive sheet.

[0020] Optionally, the external sliding sleeve of the base is provided with a protective sleeve, which is slidably adjusted and fixed; the protective sleeve is hinged with a first locking plate on the opening edge close to the base cover, and the other end of the first locking plate is hinged with a second locking plate that can abut against the upper surface of the base cover; a part of the fixing ring protrudes out of the limiting groove, and the end of the second locking plate away from the first locking plate is provided with a locking notch into which the protruding part of the fixing ring is inserted, and a locking member is provided on the outside of the base for removably locking the second locking plate to the base cover.

[0021] By adopting the above technical solution, due to the combined arrangement of the protective sleeve, the first locking plate and the second locking plate, when the micro switch is used, the protective sleeve is slid as a whole in the direction close to the base cover and fixed, and then the first locking plate and the second locking plate are rotated in the direction close to the base cover, so that the upper side of the base cover on one side of the second locking plate abuts, and in this state, the protruding part of the fixing ring is inserted into the limiting notch, and finally the locking piece is used to lock the second locking plate; the protective sleeve is used to seal and protect the connection between the base and the base cover, and the fixing ring is further locked by the second locking plate.

[0022] Optionally, one end of the first conductive sheet, the second conductive sheet and the third conductive sheet are exposed to the side of the base away from the base cover; the protective sleeve is hinged with sealing plates on two opposite edges of the opening facing the base, and the two sealing plates can be rotated downward to block the side of the base away from the base cover; the first locking plate and the second locking plate can be rotated in this state toward the blocking plate, so that the second locking plate abuts against the abutment of the two sealing plates, and the second locking plate in this state is fixed by a locking piece.

[0023] By adopting the above technical solution, when transporting the micro switch, the protective sleeve is slid downward as a whole to be adjusted and fixed, and then the two sealing plates are rotated downward to seal the side of the base away from the base cover; then the first locking plate and the second locking plate are rotated in the direction close to the sealing plate, so that the second locking plate abuts against the abutment of the two sealing plates, and finally the locking piece is used to lock the second locking plate in this state, so as to protect the exposed parts of the first conductive sheet, the second conductive sheet and the third conductive sheet, and reduce the possibility of the exposed parts of the conductive sheets being contaminated by impurities during transportation.

[0024] Optionally, an accommodating groove is provided on the side opposite to the protective sleeve for the sealing plate to be rotatably inserted and fixed.

[0025] By adopting the above technical solution, due to the setting of the accommodating sink, when the micro switch is used, the blocking plate is rotated and fixed into the accommodating sink, thereby reducing the overall size of the micro switch and improving the performance of the micro switch.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the micro switch is used in a humid environment, the upper flange on the sealing sleeve is tightly pressed against the inner wall of the sealing ring groove on the protruding rod, and the lower flange is tightly pressed against the bottom side of the limiting sink, thereby reducing the possibility of external water vapor or other impurities entering the base cover and enhancing its waterproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application; Figure 2 It is a schematic cross-sectional structural diagram of the installation and matching of the first conductive sheet, the second conductive sheet and the third conductive sheet in Embodiment 1 of the present application; Figure 3 It is a schematic diagram of the exploded structure of the installation distribution of the sealing sleeve and the button in Example 1 of the present application; Figure 4 It is a partial cross-sectional structural schematic diagram of the sealing sleeve installation and matching in Example 1 of the present application; Figure 5 This is a schematic diagram of the structure of the installation distribution of the first conductive sheet, the second conductive sheet and the third conductive sheet according to the first embodiment of the present application; Figure 6 It is a cross-sectional structural diagram of the embodiment 1 of the present application showing the installation and matching of the connecting piece; Figure 7 This is a schematic diagram of the structure of the installation and matching of the connecting piece in Example 2 of the present application; Figure 8 This is a schematic diagram of the overall structure of the fixing ring when the fixing ring is fixed in Embodiment 3 of the present application; Fig. 9 is a schematic diagram of a partial cross-sectional structure of the fixing ring when the fixing ring is fixed in Embodiment 3 of the present application; Fig.10 This is a schematic diagram of the overall structure of protecting the exposed parts of the first conductive sheet, the second conductive sheet and the third conductive sheet according to the third embodiment of the present application; Fig.11 It is a schematic diagram of a partial cross-sectional structure of embodiment 3 of the present application, which embodies protection of exposed portions of the first conductive sheet, the second conductive sheet and the third conductive sheet.

[0029] In the figure, 1, base; 11, first support block; 12, second support block; 2, base cover; 21, limiting hole; 22, limiting groove; 23, limiting snap ring; 24, first positioning thread groove; 3, conductive component; 31, first conductive sheet; 311, first support plate; 3111, third rotation groove; 312, second support plate; 3121, first rotation groove; 3122, clearance notch; 3123, limiting notch; 3124, second rotation groove; 32, second conductive sheet; 321, second contact; 33, third conductive sheet; 331, third contact; 34, connecting sheet; 341, first contact ; 342, connecting foot; 343, limiting protrusion; 344, first through hole; 345, second through hole; 4, control member; 41, tension spring; 42, spring piece; 5, button; 51, extrusion part; 52, protruding rod; 521, sealing ring groove; 6, sealing member; 61, sealing sleeve; 611, upper flange; 612, lower flange; 62, fixing ring; 7, protective sleeve; 71, first locking plate; 72, second locking plate; 721, locking notch; 722, positioning through hole; 73, sealing plate; 731, second positioning threaded groove; 74, accommodating sink groove; 8, locking member; 81, countersunk screw. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0031] Embodiment 1: Reference Figure 1 and Figure 2 A waterproof micro switch comprises a base 1, a base cover 2 fixedly mounted on the base 1, wherein the base 1 is provided with a conductive component 3, wherein the conductive component 3 comprises a first conductive sheet 31, a second conductive sheet 32 ​​and a third conductive sheet 33 fixedly mounted on the base 1, and one end of the first conductive sheet 31, the second conductive sheet 32 ​​and the third conductive sheet 33 is exposed to a side of the base 1 away from the base cover 2; and a connecting sheet 34 is provided on the first conductive sheet 31; The base cover 2 is provided with a control member 4 for controlling the rotation of the connecting piece 34 and a button 5 for squeezing the control member 4. When the user presses the button 5, the control member 4 in the base cover 2 can be squeezed, thereby driving the connecting piece 34 to abut against the second conductive piece 32 or the third conductive piece 33, so that the first conductive piece 31 is connected to the second conductive piece 32, or the first conductive piece 31 is connected to the second conductive piece 32, so as to control the on and off of the two circuits.

[0032] Reference Figure 3 and Figure 4The button 5 includes an extrusion portion 51 located in the base cover 2, a protruding rod 52 fixed to one side of the extrusion portion 51, a limiting hole 21 for the protruding rod 52 to penetrate and extend to the outside is opened on the base cover 2, and a sealing member 6 is provided on the outside of the base 1, wherein the sealing member 6 includes a sealing sleeve 61 sleeved on the outer periphery of the protruding rod 52 extending to the outside, wherein the sealing sleeve 61 has elastic properties and is made of rubber, and the two ends of the sealing sleeve 61 are respectively integrally formed with an inwardly bent upper flange 611 and an outwardly bent lower flange 612; A sealing ring groove 521 is provided on the outer periphery of the protruding rod 52 for the upper flange 611 to be clamped and pressed against, wherein a limiting recessed groove 22 is provided on the outer opening edge of the limiting hole 21 for the lower flange 612 to be clamped and pressed against, and a limiting clamping ring 23 is integrally formed on the edge of the limiting recessed groove 22 close to the limiting hole 21 and sleeved on the outer periphery of the protruding rod 52; A fixing ring 62 that presses against the lower flange 612 is fixed in the limiting groove 22, and a part of the fixing ring 62 protrudes out of the limiting groove 22, wherein the fixing ring 62 inserted into the limiting groove 22 is provided with an external thread on its outer periphery, and an internal nut is provided on the inner side wall of the limiting groove 22; the user can thread the fixing ring 62 inside the limiting groove 22, and make the inner end of the fixing ring 62 press against the lower flange 612.

[0033] Reference Figure 5 The second conductive sheet 32 ​​is fixedly provided with a second contact 321, wherein the third conductive sheet 33 is fixedly provided with a third contact 331 located directly below the first contact 341; the side of the connecting sheet 34 away from the first conductive sheet 31 is fixedly provided with a first contact 341 located between the second contact 321 and the third contact 331; The base 1 is integrally formed with a first support block 11 for supporting the second conductive sheet 32 ​​and a second support block 12 for supporting the third conductive sheet 33. Through the combination of the first support block 11 and the second support block 12, the creepage distance between the second conductive sheet 32 ​​and the third conductive sheet 33 can meet the requirement of >3mm (the standard requirement is >2.5mm). The creepage distance is large and the product is safer to use. The first conductive sheet 31 is fixedly provided with a first support plate 311 and a second support plate 312 for supporting the control member 4 and the connecting sheet 34 side by side, wherein the second support plate 312 is located close to the second conductive sheet 32.

[0034] Reference Figure 5 and Figure 6 , two symmetrical connecting legs 342 are integrally formed on one side of the connecting piece 34, wherein a first rotating groove 3121 for the connecting legs 342 to be inserted and rotated is provided on the side of the second support plate 312 away from the first support plate 311; the control member 4 is a tension spring 41 in a stretched state, the two ends of the tension spring 41 are respectively fixedly connected to the first support plate 311 and the connecting piece 34, and a clearance notch 3122 for the tension spring 41 to pass through is provided on the second support plate 312; When the button 5 is not pressed normally, under the action of the tension spring 41, the first contact 341 on the connecting piece 34 abuts against the second contact 321 on the second conductive piece 32; after the button 5 is pressed, the tension spring 41 moves downward as a whole, and drives the connecting piece 34 to rotate toward the direction close to the third conductive piece 33, so that the first contact 341 abuts against the third contact 331.

[0035] Reference Figure 6 A limiting protrusion 343 is integrally formed on the side edges of the connecting feet 342 that are away from each other, and limiting notches 3123 for the limiting protrusion 343 to be inserted and rotated are opened on the opposite side surfaces of the second support plate 312, so as to improve the installation stability of the connecting piece 34.

[0036] The implementation principle of the embodiment of the present application is: When the button 5 is pressed, the tension spring 41 is compressed and rotated downward, so that the connecting piece 34 rotates as a whole in the direction close to the third conductive piece 33, so that the first contact 341 abuts against the third contact 331 on the third conductive piece 33, and the first conductive piece 31 is connected with the second conductive piece 32. In this state, the spacing between the first contact 341 and the second contact 321 is greater than 1.5mm, which meets the standard requirement of complete disconnection (the national standard requirement is greater than 1.5mm); when the button 5 is not pressed under normal conditions, in this state, under the action of the tension spring 41, the first contact 341 on the connecting piece 34 abuts against the second contact 321 on the second conductive piece 32, so that the first conductive piece 31 is connected with the second conductive piece 32. In this state, the spacing between the first contact 341 and the third contact 331 is also greater than 1.5mm. The larger the spacing, the safer and more reliable it is to use, and the better the withstand voltage and insulation performance. The larger the spacing, the more space there is to reduce the arc burning of the contacts, and the longer the service life of the switch.

[0037] Embodiment 2: Reference Figure 7 The embodiment of the present application is different from the embodiment 1 in that the connecting piece 34 is provided with a first through hole 344 for the first support plate 311 to pass through, and a second through hole 345 for the second support plate 312 to pass through, and the control member 4 is a spring piece 42 in the second through hole 345 and in a bent state; a second rotation groove 3124 is provided on the side of the second support plate 312 away from the first support plate 311, and a third rotation groove 3111 is provided on the side of the first support plate 311 away from the second support plate 312; The spring piece 42 is located on the side of the second support plate 312 away from the first support plate 311, one side of the spring piece 42 is snapped into the second rotation groove 3124, and the other side of the spring piece 42 is snapped and fixed to the inner edge of the second through hole 345 away from the first support plate 311; the inner edge of the first through hole 344 away from the second support plate 312 is snapped into the third rotation groove 3111.

[0038] The implementation principle of the embodiment of the present application is: When the button 5 is pressed, the connecting piece 34 rotates as a whole toward the direction close to the third conductive piece 33, so that the first contact 341 abuts against the third contact 331 on the third conductive piece 33, and the first conductive piece 31 is connected to the third conductive piece 33; when the button 5 is not pressed in the normal state, under the action of the spring 42, the first contact 341 on the connecting piece 34 abuts against the second contact 321 on the second conductive piece 32, so that the first conductive piece 31 is connected to the second conductive piece 32.

[0039] Embodiment 3: Reference Figure 8 The difference between the embodiment of the present application and embodiment 1 is that the external sliding sleeve of the base 1 is provided with a protective sleeve 7, wherein the protective sleeve 7 can be reciprocatingly slid and adjusted and fixed; a fixing through hole is opened on the protective sleeve 7, and a plurality of fixing thread grooves are opened on the outer surface of the base 1. When the protective sleeve 7 slides to a certain position, the fixing through hole coincides with the fixing thread groove at that position, and then a screw is used to penetrate the fixing through hole and then screwed into the fixing thread groove.

[0040] Reference Figure 8 and Fig. 9 A first locking plate 71 is hingedly connected to the opening edge of the protective sleeve 7 close to the base cover 2, and a second locking plate 72 capable of abutting against the upper surface of the base cover 2 is hingedly connected to the end of the first locking plate 71 away from the protective sleeve 7; a locking notch 721 is provided at the end of the second locking plate 72 away from the first locking plate 71 into which the protruding part of the fixing ring 62 is inserted, and a locking member 8 is provided on the outside of the base 1 to detachably lock the second locking plate 72 to the base cover 2; The locking piece 8 is a countersunk screw 81, a positioning through hole 722 is provided on the second locking plate 72, and a positioning thread groove is provided on the upper side of the base cover 2; when the second locking plate 72 needs to be fixed, the staff can use the countersunk screw 81 to fix the second locking plate 72 on the base cover 2, and then further lock the fixing ring 62.

[0041] Reference Fig.10 and Fig.11 The protective sleeve 7 is hinged with blocking plates 73 on the two opposite edges of the opening facing the base 1; during transportation after the micro switch is assembled, the user first slides the protective sleeve 7 downward as a whole to adjust and fix it, and then rotates the two blocking plates 73 downward to block the side of the base 1 away from the base cover 2; Then, the first locking plate 71 and the second locking plate 72 are rotated in the direction of approaching the blocking plate 73 in this state, so that the second locking plate 72 abuts against the abutment point of the two blocking plates 73; and a second positioning thread groove 731 is provided on the blocking plate 73, which can coincide with the positioning through hole 722 on the second locking plate 72. When the second locking plate 72 abuts against the outer side surface of the blocking plate 73, the countersunk screw 81 can be used to fix the second locking plate 72 in this state, so as to protect the exposed parts of the first conductive plate 31, the second conductive plate 32 and the third conductive plate 33.

[0042] Reference Figure 8 and Fig.10 A receiving groove 74 for the sealing plate 73 to be rotated and inserted into is provided on the opposite side of the protective sleeve 7. With this arrangement, when the micro switch is used, the sealing plate 73 is rotated in a direction close to the receiving groove 74, and then the sealing plate 73 is rotated and inserted into the receiving groove 74 and fixed to the receiving groove 74 by countersunk bolts, thereby reducing the overall size of the micro switch.

[0043] The implementation principle of the embodiment of the present application is: When transporting the micro switch, the protective sleeve 7 is slid downward as a whole to adjust and fix, and then the two blocking plates 73 are rotated downward to block the side of the base 1 away from the base cover 2; then the first locking plate 71 and the second locking plate 72 are rotated in the direction close to the blocking plate 73, so that the second locking plate 72 abuts against the abutment of the two blocking plates 73, and then the countersunk screw 81 is used to penetrate the positioning through hole 722 and then screwed into the second positioning thread groove 731, so as to protect the exposed parts of the first conductive sheet 31, the second conductive sheet 32 ​​and the third conductive sheet 33; When the micro switch is used, the sealing plate 73 is rotated and fixed into the accommodating groove 74, and then the protective sleeve 7 is slid and adjusted as a whole in the direction close to the base cover 2, and then the first locking plate 71 and the second locking plate 72 are rotated in the direction close to the base cover 2, so that one side of the second locking plate 72 abuts against the upper side of the base cover 2, and finally the second locking plate 72 can be fixed to the base cover 2 using the countersunk screw 81; the protective sleeve 7 is used to seal and protect the connection between the base 1 and the base cover 2, and the fixing ring 62 is further locked by the second locking plate 72.

[0044] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0045] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A waterproof micro switch, comprising a base (1) and a base cover (2) mounted on the base (1), wherein a first conductive sheet (31), a second conductive sheet (32) and a third conductive sheet (33) are fixedly provided on the base (1), and a connecting sheet (34) is provided on the first conductive sheet (31); a control member (4) for controlling the rotation of the connecting sheet (34) and a button (5) for pressing the control member (4) are provided on the base cover (2), and when the button (5) is pressed, the control member (4) can be pressed to thereby drive the connecting sheet (34) to abut against the second conductive sheet (32) or the third conductive sheet (33); It is characterized in that The button (5) comprises an extrusion portion (51) located inside the base cover (2), and a protruding rod (52) fixed to one side of the extrusion portion (51); the base cover (2) is provided with a limiting hole (21) for the protruding rod (52) to pass through and extend to the outside; an elastic sealing sleeve (61) is sleeved on the outer periphery of the protruding rod (52) extending to the outside; and both ends of the sealing sleeve (61) are respectively fixed with an inwardly bent upper flange (611) and an outwardly bent lower flange (612); A sealing ring groove (521) for the upper flange (611) to be snapped into and pressed against is provided on the outer periphery of the protruding rod (52), a limiting recessed groove (22) for the lower flange (612) to be snapped into and pressed against is provided on the outer opening edge of the limiting hole (21), and a fixing ring (62) for pressing against the lower flange (612) is fixed in the limiting recessed groove (22).

2. A waterproof micro switch according to claim 1, characterized in that: A second contact (321) is fixedly provided on the second conductive sheet (32), and a third contact (331) located directly below the first contact (341) is fixedly provided on the third conductive sheet (33); and a first contact (341) located between the second contact (321) and the third contact (331) is fixedly provided on the side of the connecting sheet (34) away from the first conductive sheet (31).

3. A waterproof micro switch according to claim 1, characterized in that: The base (1) is fixedly provided with a first support block (11) for supporting the second conductive sheet (32) and a second support block (12) for supporting the third conductive sheet (33).

4. A waterproof micro switch according to claim 1, characterized in that: A first support plate (311) and a second support plate (312) for supporting the control member (4) and the connecting plate (34) are fixedly arranged side by side on the first conductive sheet (31), and the second support plate (312) is located close to the second conductive sheet (32).

5. A waterproof micro switch according to claim 4, characterized in that: Two connecting legs (342) are fixedly disposed on one side of the connecting piece (34) and opposite to each other, and a first rotating groove (3121) for the connecting legs (342) to be inserted and rotated is provided on the side of the second supporting plate (312) away from the first supporting plate (311); The control member (4) is a tension spring (41) in a stretched state, the two ends of the tension spring (41) are respectively fixedly connected to the first support plate (311) and the connecting piece (34), the second support plate (312) is provided with a clearance notch (3122) for the tension spring (41) to pass through, one side of the connecting piece (34) abuts against the second conductive piece (32) when the button (5) is not pressed, and rotates downward and abuts against the third conductive piece (33) when the button (5) is pressed.

6. A waterproof micro switch according to claim 5, characterized in that: A limiting protrusion (343) is fixedly provided on the side edges of the two connecting legs (342) that are away from each other, and a limiting notch (3123) for the limiting protrusion (343) to be inserted and rotated is formed on the two opposite side surfaces of the second support plate (312).

7. A waterproof micro switch according to claim 4, characterized in that: The connecting piece (34) is provided with a first through hole (344) for the first support plate (311) to pass through, and a second through hole (345) for the second support plate (312) to pass through; the control member (4) is a spring piece (42) located in the second through hole (345) and in a bent state; a second rotation groove (3124) is provided on the side of the second support plate (312) away from the first support plate (311); a third rotation groove (3111) is provided on the side of the first support plate (311) away from the second support plate (312); The spring sheet (42) is located on the side of the second support plate (312) away from the first support plate (311); one side of the spring sheet (42) is snapped into the second rotation groove (3124); the other side of the spring sheet (42) is snapped and fixed to the inner edge of the second through hole (345) away from the first support plate (311); the inner edge of the first through hole (344) away from the second support plate (312) is snapped into the third rotation groove (3111).

8. The waterproof micro switch according to claim 1, characterized in that: The outer sliding sleeve of the base (1) is provided with a protective sleeve (7), and the protective sleeve (7) is slidably adjusted and fixed; a first locking plate (71) is hingedly connected to the opening edge of the protective sleeve (7) close to the base cover (2), and a second locking plate (72) capable of abutting against the upper surface of the base cover (2) is hingedly connected to the other end of the first locking plate (71); A portion of the fixing ring (62) protrudes out of the limiting recess (22); an end of the second locking plate (72) away from the first locking plate (71) is provided with a locking notch (721) into which the protruding portion of the fixing ring (62) is inserted; and a locking member (8) is provided on the outside of the base (1) for detachably locking the second locking plate (72) to the base cover (2).

9. A waterproof micro switch according to claim 8, characterized in that: One end of the first conductive sheet (31), the second conductive sheet (32) and the third conductive sheet (33) is exposed to the side of the base (1) away from the base cover (2); the opening of the protective sleeve (7) facing the base (1) is hinged with blocking plates (73) on two opposite edges, and the two blocking plates (73) can rotate downward to block the side of the base (1) away from the base cover (2); The first locking plate (71) and the second locking plate (72) can rotate in a direction close to the blocking plate (73) in this state, so that the second locking plate (72) abuts against the abutment point of the two blocking plates (73), and the second locking plate (72) in this state is fixed by a locking member (8).

10. A waterproof micro switch according to claim 9, characterized in that: An accommodating groove (74) for the sealing plate (73) to be rotated, inserted and fixed is provided on the opposite side of the protective sleeve (7).

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