Microswitch with waterproof structure

Abstract

The utility model discloses a microswitch with a waterproof structure. The microswitch is characterized in that an annular groove is formed in the outer side wall of a base; the base cover is arranged on the base in a sleeving mode, and the outer side wall of the base abuts against the inner side wall of the base cover. The first sealing piece is contained in the annular groove and located between the inner side wall of the base and the annular groove. When the base cover is matched with the base, the limiting structure limits the first sealing piece to be separated from the annular groove; the structure does not need to be filled with glue, and is simpler to assemble, higher in waterproof performance and high in structural stability and reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a micro switch provided with a waterproof structure. Background Art

[0002] Existing micro switches typically use two methods to achieve waterproofing: ultrasonic welding and glue sealing. Ultrasonic welding can leave gaps after welding, preventing a good seal. Glue sealing is also inconvenient to operate and inefficient.

[0003] In addition, there is also a step groove provided on the base, and the sealing ring is placed on the step groove, and the sealing effect is achieved by squeezing the sealing ring through the base cover. However, the problem with this method is that the sealing ring will be subjected to lateral extrusion and vertical longitudinal extrusion. During the design process, the extrusion amount in both directions needs to be precisely controlled, otherwise the reliability of the seal will be reduced. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is how to improve the waterproof structure.

[0005] To this end, a micro switch with a waterproof structure includes:

[0006] A base, wherein an annular groove is provided on the outer wall of the base;

[0007] A base cover, the base cover is sleeved on the base, and the outer side wall of the base abuts against the inner side wall of the base cover;

[0008] a first sealing member, the first sealing member being accommodated in the annular groove, and the first sealing member being located between the inner side wall of the base and the annular groove;

[0009] A limiting structure, when the base cover is matched with the base, the limiting structure limits the first sealing member from separating from the annular groove.

[0010] The base is further provided with a fixing groove, which is communicated with the annular groove. The first sealing member is provided with a fixing portion, which is accommodated in the fixing groove. The fixing portion cooperates with the fixing groove to form the limiting structure.

[0011] The fixing groove is arranged on the top surface of the base, and both ends of the fixing groove are respectively communicated with the annular groove.

[0012] The annular groove includes a margin area, which is located on the bottom surface of the annular groove. When the base cover is matched with the base, the first seal is deformed and squeezed to fill the margin area. The annular groove with the margin area forms the limiting structure.

[0013] The annular groove is a dovetail groove, and the margin area is the two end areas of the bottom surface of the dovetail groove.

[0014] One of the base and the base cover is provided with a through hole, and the other one of the base and the base cover is provided with a fixing protrusion matched with the through hole. The through hole and the fixing protrusion form the fixation of the base and the base cover in the first direction.

[0015] One of the base and the base cover is provided with a buckle, and the other one of the base and the base cover is provided with a slot that cooperates with the buckle. The buckle and the slot fix the base and the base cover in the second direction, and the first direction is perpendicular to the second direction.

[0016] The connection between the buckle and the slot is located below the annular slot.

[0017] It also includes a button and a second sealing member, wherein the button portion is accommodated in the base cover, and the remaining portion of the button extends to the outside through the top surface of the base cover, and the portion of the button extending to the outside is provided with a groove; the lower end of the second sealing member abuts against the top surface of the base cover, and the upper end of the second sealing member is provided with a sealing protrusion, and the sealing protrusion abuts against the groove.

[0018] The sealing protrusion includes a first arc surface, a second arc surface and a connecting surface, the connecting surface connects the first arc surface and the second arc surface, the first arc surface and the second arc surface are convex, and the connecting surface abuts against the bottom surface of the groove.

[0019] The technical solution of this utility model has the following advantages:

[0020] 1. The present invention provides a micro switch with a waterproof structure. With this structural arrangement, compared to the step structure in the prior art, in the present application, the first sealing member is located between two planes. At this time, only the lateral extrusion amount needs to be considered, and the extrusion amount in other directions does not need to be considered. This position limitation is more reliable than other waterproof structures and can better achieve a sealing and waterproof effect. Secondly, since the base cover will affect the fixation of the first sealing member during the installation process, in order to prevent the first sealing member from detaching from the annular groove, a limiting effect is formed by a limiting structure to form a limited fixation, thereby improving assembly efficiency. In addition, this structure does not require glue filling, so the assembly is simpler and the waterproof performance is higher.

[0021] 2. The utility model provides a micro switch with a waterproof structure, in which a limiting structure is formed by the cooperation between the fixing groove and the fixing part to prevent the first sealing member from moving during the installation and fixing process.

[0022] 3. The utility model provides a micro switch with a waterproof structure, in which the fixing groove and the annular groove cooperate to form a "sun"-shaped structure, thereby achieving the limited fixation of the first sealing member.

[0023] 4. The present invention provides a micro switch with a waterproof structure. The margin area forms a filling margin. Compared to the square groove in the prior art, although this margin is provided, the margin area is very small. During assembly, most of it will still be against the base cover, which can easily cause it to fall off. However, the present structure has a certain margin area, which allows the deformed and extruded first sealing member to be accommodated in the annular groove and prevent it from falling out.

[0024] 5. The present invention provides a micro switch with a waterproof structure, wherein the through hole and the fixing protrusion form a fixation in a first direction, where the first direction specifically refers to the horizontal direction.

[0025] 6. The utility model provides a micro switch with a waterproof structure. The buckle and the slot cooperate to achieve the effect of buckle connection and fixing. Under the action of the buckle, the slot, the through hole and the fixing protrusion, a connection and fixing effect is formed between the base and the base cover, and the outer side wall of the base and the inner side wall of the base cover are more closely fitted, forming a sealing effect, and preventing the side wall of the base cover from bulging.

[0026] 7. The utility model provides a micro switch with a waterproof structure, and the sealing protrusion achieves a better sealing effect.

[0027] 8. The utility model provides a micro switch with a waterproof structure. The shape of the sealing protrusion is a turtle head shape, which forms an enhanced sealing effect. Even if the button is pressed frequently, water leakage will not occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a structural diagram of a micro switch with a waterproof structure provided by the utility model;

[0030] Figure 2 This is an exploded view of a micro switch with a waterproof structure provided by the utility model;

[0031] Figure 3A cross-sectional view of a micro switch provided with a waterproof structure provided by the utility model;

[0032] Figure 4 for Figure 3 A partial enlarged view of part A in the middle;

[0033] Figure 5 This is a cross-sectional view of another structure of a micro switch with a waterproof structure provided by the utility model;

[0034] Figure 6 for Figure 5 A partial enlarged view of part B in the middle.

[0035] Description of reference numerals:

[0036] 11. Base; 12. Base cover; 13. First sealing member; 14. Through hole; 15. Fixing protrusion; 16. Buckle; 17. Slot; 18. Button; 19. Second sealing member; 111. Annular groove; 112. Fixing groove; 113. Margin area; 114. Protrusion; 131. Fixing portion; 181. Groove; 191. Sealing protrusion; 1911. First arc surface; 1912. Second arc surface; 1913. Connecting surface. DETAILED DESCRIPTION

[0037] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0038] 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 positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0040] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] Example 1

[0042] This embodiment provides a micro switch with a waterproof structure. Figure 1-6 As shown, including:

[0043] The base 11 has an annular groove 111 formed on its outer wall. In this embodiment, the base 11 is generally a rectangular parallelepiped structure, with the annular grooves 111 formed on the front, rear, left, and right sides, connecting end to end to form a ring-shaped structure. The depth of the annular grooves 111 can be adjusted according to actual needs. Furthermore, it should be noted that the base 11 also has several static conductive sheets fixed thereto. These sheets are used to cooperate with the dynamic contact assembly within the microswitch to achieve a connection or disconnection effect. This is a well-known technique and will not be described in detail in this embodiment.

[0044] The base cover 12 is mounted on the base 11, with the outer walls of the base 11 abutting against the inner walls of the base cover 12. Specifically, the outer walls of the base 11 refer to the four outer walls of the front, back, left, and right sides. The inner walls of the base cover 12 and the outer walls of the base 11 are both flat, forming a surface-to-surface fit. The base cover 12 and the base 11 cooperate to form a cavity, and the dynamic contact assembly is housed within this cavity.

[0045] The first sealing member 13 is accommodated in the annular groove 111. The first sealing member 13 is located between the inner wall of the base 11 and the annular groove 111. When the first sealing member 13 is fixed, part of the first sealing member 13 is located in the annular groove 111, and the other part extends outside the annular groove 111 and abuts against the inner wall of the base 11, forming a sealing and waterproof effect at the connection between the base 11 and the base cover 12.

[0046] The limiting structure, when the base cover 12 is matched with the base 11, in this embodiment, when the base cover 12 is sleeved, it moves along the Z-axis direction to achieve the matching of the base cover 12 and the base 11. The limiting structure limits the separation of the first sealing member 13 from the annular groove 111. The limitation here is specifically due to the fact that when the base cover 12 is sleeved, when the bottom surface of the base cover 12 abuts against the first sealing member 13, the bottom surface of the base cover 12 will drive the first sealing member 13 to move downward along the Z-axis direction, thereby separating the first sealing member 13 from the annular groove 111, forming a falling effect, or causing the first sealing member 13 to deviate and affect the sealing effect. Therefore, the limiting structure is used to limit the movement of the first sealing member 13. With this structural setting, compared with the step structure in the prior art, in the present application, the first sealing member 13 is located between two planes. At this time, only the lateral extrusion amount needs to be considered, and there is no need to consider the extrusion amount in other directions. The limitation of this position is more reliable than other waterproof structures, and can better achieve the sealing and waterproof effect; secondly, since the base cover 12 will affect the fixation of the first sealing member 13 during the installation process, in order to prevent the first sealing member 13 from detaching from the annular groove 111, a limiting effect is formed by a limiting structure to form a limiting fixation, thereby improving assembly efficiency. Moreover, this structure does not require glue filling, and the assembly is simpler and the waterproof performance is higher.

[0047] Specifically, as attached Figure 1-4 As shown, the base 11 is also provided with a fixing groove 112, which is connected to the annular groove 111. The first sealing member 13 is provided with a fixing portion 131, which is accommodated in the fixing groove 112. Here, the fixing portion 131 forms a branching effect. The first sealing member 13 itself is an annular structure, and then the fixing portion 131 is a branch. Here, the direction, length, and shape of the fixing portion 131 can be adjusted according to actual needs. The fixing portion 131 cooperates with the fixing groove 112 to form a limiting structure. The limiting structure is formed by the cooperation between the fixing groove 112 and the fixing portion 131 to prevent the first sealing member 13 from moving during the sleeve fixing process.

[0048] Specifically, as attached Figure 1-4As shown, the fixing groove 112 is provided on the top surface of the base 11, and both ends of the fixing groove 112 are respectively connected to the annular groove 111. Here, the fixing groove 112 specifically penetrates through the front side and the rear side of the base 11, so that one end of the fixing groove 112 is connected to the area of the annular groove 111 on the front side, and the other end of the fixing groove 112 is connected to the area of the annular groove 111 on the rear side. The fixing groove 112 and the annular groove 111 cooperate to form a "day" - shaped structure, thereby realizing the limit fixation of the first seal 13. At this time, the first seal 13 is also in a "day" - shaped structure. In this embodiment, both the front side and the rear side of the base 11 are long sides, and the fixing groove 112 is parallel to the short side of the base 11. The number of the fixing grooves 112 can be more, for example, forming an "eye" - shaped structure, or other structures. In addition, the fixing groove 112 can be an inclined groove or a Z - shaped groove or other shapes, and those skilled in the art can adjust according to actual needs. Due to the cooperation between the fixing groove 112 and the fixing part 131, the first seal 13 is limited on the annular groove 111. Even if the bottom surface of the base cover 12 abuts against the first seal 13, under the action of the fixing part 131, the first seal 13 will not move downward along the Z - axis direction.

[0049] Specifically, as shown in the appendix Figure 5-6 As shown, the annular groove 111 includes a margin area 113. The margin area 113 is located at the bottom surface of the annular groove 111. When the base cover 12 is fitted with the base 11, the first seal 13 deforms and squeezes to fill the margin area 113, and the annular groove 111 provided with the margin area 113 forms a limiting structure. The margin area 113 forms a filling margin. Compared with the square groove in the prior art, although it has a margin, the margin area 113 is very small. During the assembly process, most of it still abuts against the base cover 12, and it is very easy to fall off under the drive of the base cover 12. And this structure has a certain margin area 113, so that the deformed and squeezed first seal 13 can be accommodated in the annular groove 111 and will not break away from the annular groove 111.

[0050] Specifically, as shown in the appendix Figure 5-6 As shown, the annular groove 111 is a dovetail groove, and the margin area 113 is the two end areas at the bottom surface of the dovetail groove. When the first seal 13 is squeezed, the first seal 13 deforms and fills the two ends of the dovetail groove after deformation, thereby forming a limiting effect, and the first seal 13 will not fall off. At this time, it is necessary to consider the lateral extrusion amount of the first seal 13. Further, the opening of the annular groove 111 can also be provided with a constricted mouth, which can improve the limiting strength of the first seal 13.

[0051] Specifically, as shown in the appendix Figure 1-6As shown, one of the base 11 and the base cover 12 is provided with a through hole 14, and the other of the base 11 and the base cover 12 is provided with a fixing protrusion 15 that cooperates with the through hole 14. The through hole 14 and the fixing protrusion 15 form a fixed position between the base 11 and the base cover 12 in a first direction. The through hole 14 and the fixing protrusion 15 form a fixed position in the first direction, where the first direction specifically refers to the horizontal direction. In this embodiment, the base 11 is provided with a through hole 14, and the front and rear sides of the base 11 are both provided with a horizontally extending protrusion 114. The through hole 14 is arranged on the protrusion 114. The bottom surface of the base cover 12 is provided with a fixing protrusion 15, which extends downward along the Z-axis direction. When the base 11 and the base cover 12 are mated, the fixing protrusion 15 extends into the through hole 14, forming a horizontal limit fixation between the base 11 and the base cover 12.

[0052] Specifically, as attached Figure 1-6 As shown, one of the base 11 and the base cover 12 is provided with a buckle 16, and the other of the base 11 and the base cover 12 is provided with a slot 17 that cooperates with the buckle 16. The buckle 16 and the slot 17 form a fixation of the base 11 and the base cover 12 in the second direction, and the first direction is perpendicular to the second direction. Here, the second direction specifically refers to the Z-axis direction. The buckle 16 cooperates with the slot 17 to achieve the effect of the buckle 16 connecting and fixing. Under the action of the buckle 16, the slot 17, the through hole 14, and the fixing protrusion 15, a connection and fixing effect is formed between the base 11 and the base cover 12, and the outer side wall of the base 11 and the inner side wall of the base cover 12 are more closely fitted, forming a sealing effect, and preventing the side wall of the base cover 12 from bulging. In this embodiment, two buckles 16 are provided on the front and rear sides of the base 11, and a slot 17 is provided on the base cover 12.

[0053] Specifically, as attached Figure 1-6 As shown, the connection between the buckle 16 and the slot 17 is located below the annular groove 111. Specifically, the buckle 16 is located below the annular groove 111. When the base cover 12 is matched with the base 11, the base cover 12 first passes through the annular groove 111 and then matches with the buckle 16.

[0054] Specifically, the bottom surface of the base cover 12 may extend beyond the bottom surface of the base 11 , or the bottom surface of the base cover 12 and the bottom surface of the base 11 may be coplanar.

[0055] Specifically, as attached Figure 1-6As shown, it also includes a button 18 and a second sealing member 19. The button 18 is partially housed in the base cover 12. Specifically, the button 18 is partially located in the cavity formed by the base cover 12 and the base 11. The remaining portion of the button 18 extends to the outside through the top surface of the base cover 12. The portion of the button 18 extending to the outside is provided with a groove 181; the lower end of the second sealing member 19 abuts against the top surface of the base cover 12, and the upper end of the second sealing member 19 is provided with a sealing protrusion 191, which abuts against the groove 181. The sealing protrusion 191 better achieves a sealing effect. The second sealing member 19 is used to seal the connection between the button 18 and the base cover 12 to form a sealing effect, thereby improving the waterproof level.

[0056] Specifically, as attached Figure 4 As shown, sealing protrusion 191 includes a first curved surface 1911, a second curved surface 1912, and a connecting surface 1913. Connecting surface 1913 connects first curved surface 1911 and second curved surface 1912. First curved surface 1911 and second curved surface 1912 are convex, and connecting surface 1913 abuts against the bottom surface of groove 181. Sealing protrusion 191 is shaped like a glans, creating a strong seal and preventing water leakage even if button 18 is pressed frequently.

[0057] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A micro switch with a waterproof structure, characterized in that: include: A base (11), wherein an outer wall of the base (11) is provided with an annular groove (111); A base cover (12), wherein the base cover (12) is sleeved on the base (11), and the outer side wall of the base (11) abuts against the inner side wall of the base cover (12); a first sealing member (13), the first sealing member (13) being accommodated in the annular groove (111), the first sealing member (13) being located between the inner side wall of the base (11) and the annular groove (111); A limiting structure, wherein when the base cover (12) is matched with the base (11), the limiting structure limits the separation of the first sealing member (13) and the annular groove (111).

2. The micro switch with a waterproof structure according to claim 1, characterized in that: The base (11) is further provided with a fixing groove (112), the fixing groove (112) being in communication with the annular groove (111), the first sealing member (13) being provided with a fixing portion (131), the fixing portion (131) being accommodated in the fixing groove (112), and the fixing portion (131) cooperates with the fixing groove (112) to form the limiting structure.

3. The micro switch with a waterproof structure according to claim 2, characterized in that: The fixing groove (112) is provided on the top surface of the base (11), and both ends of the fixing groove (112) are respectively communicated with the annular groove (111).

4. The micro switch with a waterproof structure according to claim 1, characterized in that: The annular groove (111) includes a margin area (113), and the margin area (113) is located on the bottom surface of the annular groove (111). When the base cover (12) is matched with the base (11), the first sealing member (13) is deformed and squeezed to fill the margin area (113), and the annular groove (111) provided with the margin area (113) forms the limiting structure.

5. The micro switch with a waterproof structure according to claim 4, characterized in that: The annular groove (111) is a dovetail groove, and the margin area (113) is the two end areas of the bottom surface of the dovetail groove.

6. The micro switch with a waterproof structure according to claim 1, characterized in that: One of the base (11) and the base cover (12) is provided with a through hole (14), and the other of the base (11) and the base cover (12) is provided with a fixing protrusion (15) that cooperates with the through hole (14). The through hole (14) and the fixing protrusion (15) form a fixing of the base (11) and the base cover (12) in a first direction.

7. The micro switch with a waterproof structure according to claim 6, characterized in that: One of the base (11) and the base cover (12) is provided with a snap button (16), and the other of the base (11) and the base cover (12) is provided with a slot (17) that cooperates with the snap button (16). The snap button (16) and the slot (17) form a fixation of the base (11) and the base cover (12) in a second direction, and the first direction is perpendicular to the second direction.

8. The micro switch with a waterproof structure according to claim 7, characterized in that: The connection between the buckle (16) and the slot (17) is located below the annular slot (111).

9. The micro switch with a waterproof structure according to claim 1, characterized in that: The invention also includes a button (18) and a second sealing member (19), wherein the button (18) is partially accommodated in the base cover (12), and the remaining portion of the button (18) extends to the outside through the top surface of the base cover (12), and the portion of the button (18) extending to the outside is provided with a groove (181); the lower end of the second sealing member (19) is in contact with the top surface of the base cover (12), and the upper end of the second sealing member (19) is provided with a sealing protrusion (191), and the sealing protrusion (191) is in contact with the groove (181).

10. The micro switch with a waterproof structure according to claim 9, characterized in that: The sealing protrusion (191) includes a first arc surface (1911), a second arc surface (1912) and a connecting surface (1913), wherein the connecting surface (1913) connects the first arc surface (1911) and the second arc surface (1912), the first arc surface (1911) and the second arc surface (1912) are arranged to be convex, and the connecting surface (1913) abuts against the bottom surface of the groove (181).

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