Waterproof microswitch

Abstract

The utility model discloses a waterproof microswitch, which comprises a shell, a button and a waterproof cap, the shell comprises a through hole, the button is vertically and movably arranged at the through hole of the shell, the upper end of the waterproof cap is provided with a sleeving hole, the button comprises a head part, a rod part and a connecting column, and a first annular slot is formed among the connecting column, the head part and the rod part. The inner edge of the periphery of the sleeving hole is embedded and fixed in the first annular slot, the connecting column is matched and sleeved with the sleeving hole, a first annular convex rib is integrally formed on the inner wall of the first annular slot, a second annular slot is concentrically formed in the position, corresponding to the periphery of the through hole, of the outer side of the shell, and an annular flange is arranged at the lower end of the waterproof cap. And a second annular convex rib is integrally formed on the inner wall of the second annular slot and is arranged along the second annular slot. The waterproof microswitch provided by the utility model has a better waterproof effect.

Description

Technical Field

[0001] The utility model relates to a waterproof micro switch. Background Art

[0002] The Chinese utility model patent discloses a clip-type micro switch (CN202122715801.4), which includes a housing, a button, a sealing ring and other components. The sealing ring and the button (i.e., a button) include a pressing block and a pressing column. The pressing block is arranged in the accommodating cavity, and the pressing column penetrates the top of the housing and extends outward. The sealing ring (i.e., a waterproof cap) is sleeved on the pressing column, one end of the sealing ring is clamped on the pressing column, and the other end of the sealing ring is sealed and bonded to the housing to achieve a waterproof effect at the connection between the button and the housing.

[0003] In the waterproof micro switch of the prior art represented by the above-mentioned patent, external liquid may still penetrate into the inner side of the shell along the sealing ring and the clamp as well as the joint between the sealing ring and the shell, affecting the normal operation of the micro switch. The waterproof effect needs to be improved, especially the sealing ring and the bonding point are prone to gaps after long-term use, resulting in a decrease in the waterproof effect. Summary of the invention

[0004] The utility model provides a micro switch with better waterproof effect.

[0005] The utility model provides a waterproof micro switch, comprising a shell, a button, and a waterproof cap. The shell comprises a through hole connecting the inner and outer sides thereof. The button is movably arranged at the through hole of the shell. The waterproof cap is sleeved on the outer side of the button. The waterproof cap is made of silicone, rubber or other flexible and elastic materials. A sleeve hole is arranged on the upper end of the waterproof cap. The button comprises a head located at the upper part, a rod located at the lower part, and a connecting column connected between the head and the rod. The head, the rod and the connecting column are integrally formed. The outer diameter of the connecting column is smaller than the outer diameter of the head and the rod. A first annular slot is formed between the connecting column and the head and the rod. The inner edges around the sleeve hole are embedded and fixed in the first annular slot. In an annular slot, the connecting column is sleeved with the sleeve hole, the lower end of the waterproof cap is sleeved with the periphery of the through hole, a first annular convex rib is integrally formed on the inner wall of the first annular slot, the first annular convex rib is arranged along the first annular slot, the first annular convex rib is located in the first annular slot and forms a pressing contact with the inner edge of the sleeve hole, which can increase the contact area between the inner edge of the sleeve hole and the first annular slot, so that a bent gap is generated at the contact point between the two, which can improve the waterproof effect, a second annular slot is concentrically arranged at the periphery of the corresponding through hole on the outer side of the shell, and the lower end of the waterproof cap is provided with a plug-in positioning device that cooperates with the second annular slot. annular flange, a second annular rib is integrally formed on the inner wall of the second annular slot, the second annular rib is arranged along the second annular slot, the second annular rib is located in the second annular slot and forms a contact fit with the annular flange, which can increase the contact area between the annular flange and the second annular slot, so that a bent gap is generated at the contact fit between the two, which can improve the waterproof effect, the waterproof cap includes at least two longitudinally connected barrels, these barrels have different outer diameters and are concentrically arranged, of the two longitudinally connected barrels, the diameter of the barrel located at the upper end is smaller than the diameter of the barrel located at the lower end, and the upper end of the barrel located at the top of the multiple barrels is arranged There is a top cover, the socket hole is arranged on the top cover, the two longitudinally connected cylinders are connected by an annular step portion, the annular flange is arranged around the lower end of the cylinder located at the bottom of the multiple cylinders, and the structural design of the waterproof cap composed of multiple cylinders can produce a compression and folding deformation effect when the button is pressed downward, and during the extrusion deformation process, the first annular slot and the second annular slot can still maintain uniform force, so that the waterproof cap is not easy to fall out of the first annular slot and the second annular slot or produce a large gap, which can improve the waterproof effect, especially when the button stroke is designed to be longer, it can also ensure a good contact seal.

[0006] Furthermore, the aperture of the sleeve hole is smaller than the outer diameter of the connecting column, and the inner edges of the sleeve hole are clamped around the connecting column by elastic deformation, so that the inner circumferential wall of the sleeve hole and the outer circumferential wall of the connecting column are in close contact and fit, and the first annular rib is integrally formed on the outer circumferential wall of the connecting column to provide an improved sealing effect between the sleeve hole and the inner circumferential wall.

[0007] Furthermore, the movable connection between the button and the shell constitutes a circumferential limit fit that prohibits the button from rotating relative to the shell, which prevents the button and the shell from rotating relative to each other, thereby preventing leakage at the connection between the waterproof cap and the button and the shell due to the twisting of the waterproof cap 3.

[0008] Furthermore, an inner cylinder portion and an outer cylinder portion protruding outward are concentrically arranged around the corresponding through hole on the outside of the shell, and the second annular slot is formed by the interval between the inner cylinder portion and the outer cylinder portion. The arrangement of the inner cylinder portion and the outer cylinder portion can block water, and arranging the annular flange in the second annular slot can produce a bent gap at the fitting position, thereby improving the waterproof effect.

[0009] Furthermore, the annular flange is positioned at the bottom of the second annular slot, and the upper end of the outer cylinder is deformed and bent through a hot riveting process and abuts against the upper end of the annular flange, which can produce a pressing and limiting effect on the annular flange, thereby preventing the annular flange from escaping from the second annular slot and maintaining the annular flange in a state of pressing contact with the second annular rib.

[0010] Furthermore, the second annular rib is arranged on the annular bottom inner wall of the second annular slot and forms a contact fit with the bottom of the annular flange, so that water entering the second annular slot is not easy to penetrate along the bottom of the annular flange and the annular bottom inner wall of the second annular slot.

[0011] Furthermore, the first annular convex rib has an arc-shaped or wedge-shaped sealing mating surface, which has a better contact effect when mating with the waterproof cap.

[0012] Furthermore, the second annular convex rib has an arc-shaped or wedge-shaped sealing mating surface, which has a better contact effect when mating with the waterproof cap.

[0013] The beneficial effects of the utility model are as follows: compared with the existing micro switch with waterproof function, the utility model has minor changes, simple structure, convenient assembly, easy implementation of the overall solution, and better waterproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0015] Figure 2 An exploded view of an embodiment of the utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of an embodiment of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the second annular slot in an embodiment of the utility model;

[0018] Figure 5 This is a structural diagram of a button in an embodiment of the utility model;

[0019] Figure 6 The structure of the waterproof cap of the utility model embodiment Figure 1 ;

[0020] Figure 7 The structure of the waterproof cap of the utility model embodiment Figure 2 . DETAILED DESCRIPTION

[0021] The embodiment of the waterproof micro switch of the utility model is as follows: Figure 1-7 As shown, it includes a housing 1, a button 2, and a waterproof cap 3. The housing 1 includes a through hole 10 connecting the inside and the outside thereof. The button 2 is movably arranged at the through hole 10 of the housing 1. The waterproof cap 3 is sleeved on the outside of the button 2. The waterproof cap 3 is made of silicone, rubber or other flexible and elastic materials. The upper end of the waterproof cap 3 is provided with a sleeve hole 31. Figure 5 As shown, the button 2 includes a head 21 located at the upper part, a rod 22 located at the lower part, and a connecting column 23 connected between the head 21 and the rod 22. The head 21, the rod 22, and the connecting column 23 are integrally formed. The outer diameter of the connecting column 23 is smaller than the outer diameters of the head 21 and the rod 22. A first annular slot 24 is formed between the connecting column 23 and the head 21 and the rod 22. The inner edge 3a around the sleeve hole 31 is embedded and fixed in the first annular slot 24. The connecting column 23 is sleeved with the sleeve hole 31. A first annular rib 241 is integrally formed on the inner wall of the first annular slot 24. The first annular rib 241 extends along the first annular slot. 24 is provided, the first annular rib 241 is located in the first annular slot 24 and forms a pressing contact fit with the inner edge 3a around the sleeve hole 31. Specifically, the aperture of the sleeve hole 31 is smaller than the outer diameter of the connecting column 23, and the inner edge 3a around the sleeve hole 31 is clamped around the connecting column 23 by elastic deformation, so that the inner circumferential wall of the sleeve hole 31 and the outer circumferential wall of the connecting column 23 are in close contact and fit. The first annular rib 241 is integrally formed on the outer circumferential wall of the connecting column 23, which can increase the contact area between the inner edge 3a around the sleeve hole 31 and the outer circumferential wall of the connecting column 23, so that a bent gap is generated at the contact and fit between the two, which can improve the waterproof effect.

[0022] A second annular slot 11 is concentrically arranged around the outer side of the shell 1 corresponding to the through hole 10, and an annular flange 32 is arranged at the lower end of the waterproof cap 3 to be plugged and positioned with the second annular slot 11. The annular flange 32 is formed by extending from the lower end of the waterproof cap 3 in the surrounding directions, and a second annular rib 111 is integrally formed on the inner wall of the second annular slot 11. The second annular rib 111 is arranged along the second annular slot 11, and the second annular rib 111 is located in the second annular slot 11 and forms a contact fit with the annular flange 32. Specifically, an inner cylinder portion 12 and an outer cylinder portion 13 protruding outward are concentrically arranged around the outer side of the shell 1 corresponding to the through hole 10. The inner cylinder portion 12 and the outer cylinder portion 13 are integrally formed on the shell 1, and the second annular The slot 11 is formed by the interval between the inner cylinder portion 12 and the outer cylinder portion 13. The second annular rib 111 is arranged on the inner wall of the annular bottom of the second annular slot 11 and contacts and cooperates with the bottom of the annular flange 32, so that the water entering the second annular slot 11 is not easy to penetrate along the bottom of the annular flange 32 and the inner wall of the annular bottom of the second annular slot 11. The arrangement of the inner cylinder portion 12 and the outer cylinder portion 13 can play a role in blocking water. The annular flange 32 is arranged in the second annular slot 11 and the bottom of the annular flange 32 and the inner wall of the annular bottom of the second annular slot 11 and the second annular rib 111 are in contact and cooperate, which can increase the contact area between the annular flange 32 and the second annular slot 11, so that a bent gap is generated at the contact and cooperation between the two, and the waterproof effect can be improved.

[0023] The waterproof cap 3 includes three longitudinally connected cylinders 301, which have different outer diameters and are concentrically arranged. Among the two longitudinally connected cylinders 301, the diameter of the cylinder 301 located at the top is smaller than the diameter of the cylinder 301 located at the bottom. A top cover 302 is arranged at the upper end of the cylinder 301 located at the top of the multiple cylinders 301. The sleeve hole 31 is arranged on the top cover 302, so the top cover 302 also constitutes the inner edge 3a around the sleeve hole 31. The two longitudinally connected cylinders 301 are connected by an annular step portion 302. The annular flange 302 is provided on the top end of the cylinder 301 located at the top. 2 is arranged around the lower end of the lowest cylindrical portion 301 among the multiple cylindrical portions 301 and extends in all directions. The structural design of the waterproof cap composed of the multiple cylindrical portions can produce a compression and folding deformation effect when the button 2 is pressed downward. During the extrusion deformation process, the first annular slot 24 and the second annular slot 11 can still maintain uniform force, so that the waterproof cap is not easy to escape from the first annular slot 24 and the second annular slot 11 or produce a large gap, which can improve the waterproof effect. In particular, when the stroke of the button 2 is designed to be longer, a good contact seal can also be guaranteed.

[0024] In this embodiment, if Figure 3As shown, the upper end 13a of the outer cylinder portion 13 is deformed and bent by a hot riveting process and abuts against the upper end of the annular flange 32, which can produce a pressing and limiting effect on the annular flange 32, and can prevent the annular flange 32 from escaping upward from the second annular slot 11, and can also keep the annular flange 32 in a state of pressing and contacting with the second annular rib 111, thereby improving the sealing effect.

[0025] The movable connection between the button 2 and the shell 1 constitutes a circumferential limit fit that prohibits the button 2 from rotating relative to the shell. For example, the fit between the button 2 and the through hole 10 adopts a non-circular profile, which prevents the button 2 and the shell 1 from rotating relative to each other, and can prevent the connection between the waterproof cap 3 and the button 2 and the shell 1 from generating gaps due to the twisting of the waterproof cap 3, thereby causing leakage.

[0026] In this embodiment, the first annular convex rib 241 has an arc-shaped sealing mating surface, and the second annular convex rib 111 has a wedge-shaped sealing mating surface, which has a better contact effect when mating with the waterproof cap 3.

[0027] The provision of the first annular convex rib 241 and the second annular convex rib 111 can increase the contact area with the waterproof cap 3, and also make the gap at the fitting position have a longer water seepage path, which can increase the difficulty of water penetration and also reduce the tolerance requirements for the fitting position of the components, thereby improving the waterproof effect.

[0028] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A waterproof micro switch, comprising a housing, a button, and a waterproof cap, wherein the housing comprises a through hole connecting the inner and outer sides thereof, the button is movably arranged at the through hole of the housing, the waterproof cap is sleeved on the outer side of the button, a sleeve hole is arranged at the upper end of the waterproof cap, the button comprises a head at the upper part, a rod at the lower part, a connecting column connected between the head and the rod, the outer diameter of the connecting column is smaller than the outer diameter of the head and the rod, a first annular slot is formed between the connecting column and the head and the rod, the inner edge around the sleeve hole is embedded and fixed in the first annular slot, the connecting column is sleeved with the sleeve hole, the lower end of the waterproof cap is sleeved with the through hole around, and the characteristics are: A first annular rib is integrally formed on the inner wall of the first annular slot, and the first annular rib is arranged along the first annular slot. The first annular rib is located in the first annular slot and forms a pressing contact fit with the inner edges of the sleeve hole. A second annular slot is concentrically arranged around the corresponding through hole on the outer side of the shell. An annular flange is arranged at the lower end of the waterproof cap for inserting and positioning with the second annular slot. A second annular rib is integrally formed on the inner wall of the second annular slot, and the second annular rib is arranged along the second annular slot. The second annular rib is located in the second annular slot and forms a contact fit with the annular flange. The waterproof cap includes at least two longitudinally connected cylinders, which have different outer diameters and are concentrically arranged. Among the two longitudinally connected cylinders, the diameter of the upper cylinder is smaller than the diameter of the lower cylinder. A top cover is arranged on the upper end of the cylinder located at the top of the multiple cylinders, and the sleeve hole is arranged on the top cover. The two longitudinally connected cylinders are connected by an annular step portion, and the annular flange is arranged around the lower end of the cylinder located at the bottom of the multiple cylinders.

2. The waterproof micro switch according to claim 1, characterized in that: The diameter of the sleeve hole is smaller than the outer diameter of the connecting column, and the first annular convex rib is integrally formed on the outer peripheral wall of the connecting column.

3. The waterproof micro switch according to claim 2, characterized in that: The movable connection between the button and the shell forms a circumferential limit fit that prohibits the button from rotating relative to the shell.

4. The waterproof micro switch according to claim 1, characterized in that: An inner cylinder portion and an outer cylinder portion protruding outward are concentrically arranged around the outer side of the shell corresponding to the through hole, and the second annular slot is formed by the interval between the inner cylinder portion and the outer cylinder portion.

5. The waterproof micro switch according to claim 4, characterized in that: The annular flange is positioned at the bottom of the second annular slot, and the upper end of the outer cylinder is deformed and bent by a hot riveting process and abuts against the upper end of the annular flange.

6. The waterproof micro switch according to claim 1, characterized in that: The second annular rib is arranged on the inner wall of the annular bottom of the second annular slot and forms a contact fit with the bottom of the annular flange.

7. The waterproof micro switch according to any one of claims 1 to 5, characterized in that: The first annular rib has an arc-shaped or wedge-shaped sealing matching surface.

8. The waterproof micro switch according to any one of claims 1 to 5, characterized in that: The second annular rib has an arc-shaped or wedge-shaped sealing matching surface.

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