Improved microswitch

Abstract

The utility model discloses an improved structure of microswitch, including casing and set up in the first terminal, second terminal, third terminal, spring, transmission part and pressing piece in the casing, second terminal rotation is established in the casing, and spring one end and first terminal connect conduction, and spring other end and second terminal connect conduction, and spring has the tendency of making the moving contact of second terminal and the static contact of third terminal far away, and transmission part inner end spring is opposite, and the casing is equipped with the guide hole to transmission part outer end, and pressing piece and casing rotation is connected, still include flexible sealing cap, and the casing outer table corresponds the guide hole periphery and is equipped with the installation groove, and flexible sealing cap is sealed and is established in the installation groove, and flexible sealing cap covers the guide hole, and transmission part outer end passes through the guide hole and is opposite with flexible sealing cap, and makes flexible sealing cap top and pressing piece opposite. The utility model discloses pressing piece and transmission part through flexible sealing cap elastic deformation transmission, and the normal work of microswitch realizes the effect of preventing water from entering the guide hole simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of micro switch technology, and specifically to an improved structure of a micro switch. Background Technology

[0002] Most current microswitches have a through hole in the housing for the outer end of the transmission component to extend. The transmission component is telescopically positioned within the through hole, resulting in a gap between the transmission component and the inner wall of the through hole. When the microswitch is used as an installation position detection switch in a soymilk maker, blender, or mixer, the appliance is prone to contact with water. Water flowing downwards towards the microswitch can cause water to enter the microswitch through the gap, leading to a short circuit or leakage hazard. Utility Model Content

[0003] The purpose of this invention is to provide an improved structure for a waterproof micro switch.

[0004] The purpose of this utility model is achieved as follows.

[0005] An improved microswitch structure includes a housing and a first terminal, a second terminal, a third terminal, a spring, a transmission element, and a pressing element disposed within the housing. The second terminal is rotatably disposed within the housing. One end of the spring is electrically connected to the first terminal, and the other end of the spring is electrically connected to the second terminal. The spring has a tendency to move the moving contact of the second terminal away from the stationary contact of the third terminal. The inner end of the transmission element abuts against the spring. The housing has a guide hole corresponding to the outer end of the transmission element. The pressing element is rotatably connected to the housing. The structure also includes a flexible sealing cap. The outer surface of the housing has a mounting groove corresponding to the periphery of the guide hole. The flexible sealing cap is sealed within the mounting groove and blocks the guide hole. The outer end of the transmission element passes through the guide hole and abuts against the flexible sealing cap, and the top of the flexible sealing cap abuts against the pressing element.

[0006] Furthermore, the bottom side of the flexible sealing cap makes sealing contact with the side of the mounting groove, the bottom surface of the flexible sealing cap makes sealing contact with the bottom surface of the mounting groove, and the top of the flexible sealing cap makes elastic deformation contact with the outer end of the transmission component and the pressing component, respectively. The flexible sealing cap is not easy to fall off, and the double seal improves waterproof performance.

[0007] Furthermore, the flexible sealing cap includes a sealing part and an elastic deformation part. The elastic deformation part is formed by an upward convexity at the center of the sealing part. The sealing part is annular and is sealed to the mounting groove. The elastic deformation part is boss-shaped, with its top protruding from the top surface of the mounting groove. The bottom surface of the elastic deformation part has an upper concave part. The outer end of the transmission component is inserted into the upper concave part and abuts against the top and bottom surfaces of the elastic deformation part. The pressing component abuts against the top surface of the elastic deformation part.

[0008] The elastic deformation part facilitates the transmission between the pressing part and the transmission part. The deformation of the elastic deformation part will not cause the sealing part to deform, ensuring that the sealing part maintains good sealing performance.

[0009] Furthermore, the bottom of the sealing part abuts against the bottom surface of the mounting groove, the opening of the upper recess faces the guide hole, and the outer periphery of the sealing part and the side of the mounting groove are interference-fitted. The flexible sealing cap is simple and easy to install.

[0010] Furthermore, the elastic deformation part is truncated cone-shaped, with its bottom diameter larger than its top diameter. The outer end of the transmission component abuts against the elastic deformation part via a plane, arc surface, or spherical surface. This design minimizes the risk of damage to the elastic deformation part, and the large deformation space within the elastic deformation part prevents it from affecting the sealing part.

[0011] Furthermore, the pressing component is sheet-shaped, with rotating parts extending from both sides of one end of the pressing component. A limiting part is provided on the outer side of the rotating part, and rotating grooves are provided on both sides of the housing. A convex shaft is provided in the center of the rotating groove, and a limiting groove is provided on the outer side of the rotating groove. The rotating part is inserted into the corresponding rotating groove, and the limiting part is placed in the limiting groove. The pressing component rotates around the convex shaft through the rotating part, and the limiting part moves within the limiting groove as the rotating part rotates.

[0012] The pressing component limits the rotation, preventing the flexible sealing cap from being completely removed from the installation groove, and also preventing excessive compression of the flexible sealing cap.

[0013] Furthermore, when the spring pushes the transmission component to move outward, the outer end of the transmission component abuts against the bottom surface of the pressing component through the top of the flexible sealing cap, and the pressing component rotates upward until the limiting part abuts against one end of the limiting groove.

[0014] The pressing component and the transmission component clamp the top of the flexible sealing cap.

[0015] Furthermore, the housing includes a front cover and a rear seat, which are snap-fitted together. The front cover covers the first terminal, second terminal, third terminal, spring, and transmission component installed inside the rear seat. A groove is formed on the top of the rear seat, with a first semi-circular groove on the top surface of the groove and a first semi-circular hole on the side surface of the groove. A first locking groove is formed on the bottom surface of the groove, and the first semi-circular groove and the first locking groove on the bottom surface of the groove are connected through the first semi-circular hole. The first locking groove and the groove are T-shaped. A protrusion extends from the top of the front cover toward the rear seat, with a second semi-circular groove on the top surface of the protrusion, a second semi-circular hole on the side surface of the protrusion, and a second locking groove on the bottom surface of the protrusion. The second semi-circular groove and the second semi-circular hole are connected through the second locking groove. The protrusion is inserted into the groove, and the first semi-circular groove and the second semi-circular groove are aligned and closed to form the mounting groove. The first semi-circular hole and the second semi-circular hole are aligned and closed to form the guide hole. The first locking groove and the second locking groove are aligned and closed to form an inverted T-shaped groove. The transmission component is a T-shaped component and is placed in the inverted T-shaped groove.

[0016] Compared to existing technologies, this method brings the joint between the groove and the protrusion closer to the central axis of the shell along its length, allowing the transmission component to block the joint in the vertical direction and improving the waterproof effect.

[0017] Furthermore, the seam connecting the groove and the protrusion is aligned with the axis of symmetry along the length of the pressing member. The pressing member covers the seam, preventing water from easily dripping onto it.

[0018] Furthermore, the top of the inner wall of the mounting groove extends upward beyond the top surface of the housing to form an annular protrusion, the outer side of which is inclined to prevent water from the top of the housing from flowing into the mounting groove.

[0019] The flexible sealing cap of this utility model seals the guide hole. The pressing component and the transmission component are driven by the elastic deformation of the flexible sealing cap, which ensures that the micro switch can work normally while achieving the effect of preventing water from entering the guide hole. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1.

[0021] Figure 2 This is a schematic diagram of the exploded structure of Example 1.

[0022] Figure 3 This is another exploded structural diagram of Example 1.

[0023] Figure 4 This is a cross-sectional structural diagram of Example 1.

[0024] Figure 5 This is a side view of Embodiment 1. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Example 1, see Figure 1-5 As shown, an improved micro switch structure includes a housing 1, a first terminal 11, a second terminal 12, a third terminal 13, a spring 14, a transmission component 15, a pressing component 4, and a flexible sealing cap 5.

[0027] The first terminal 11 and the second terminal 12 are disposed inside the housing 1. The second terminal 12 is rotatably disposed inside the housing 1. One end of the spring 14 is connected to the first terminal 11 for conduction, and the other end of the spring 14 is connected to the second terminal 12 for conduction. The spring 14 has a tendency to move the moving contact 121 of the second terminal 12 and the stationary contact 131 of the third terminal 13 away from each other. The inner end of the transmission member 15 abuts against the spring 14. The housing 1 is provided with a guide hole 100 corresponding to the outer end of the transmission member 15. The pressing member 4 is rotatably connected to the housing 1. The outer surface of the housing 1 is provided with a mounting groove 10 corresponding to the periphery of the guide hole 100. The flexible sealing cap 5 is sealed in the mounting groove 10. The flexible sealing cap 5 blocks the guide hole 100. The outer end of the transmission member 15 passes through the guide hole 100 and abuts against the flexible sealing cap 5, and the top of the flexible sealing cap 5 abuts against the pressing member 4.

[0028] Specifically, the housing 1 includes a front cover 2 and a rear seat 3, which are snap-fitted together. The front cover 2 covers the first terminal 11, the second terminal 12, the third terminal 13, the spring 14, and the transmission component 15 installed inside the rear seat 3. A groove 31 is formed on the top of the rear seat 3. A first semi-circular groove 32 is provided on the top surface of the groove 31. A first semi-circular hole 33 is provided on the side surface of the groove 31. A first locking groove 34 is provided on the bottom surface of the groove 31. The first semi-circular groove 32 and the first locking groove 34 on the bottom surface of the groove 31 are connected through the first semi-circular hole 33. The first locking groove 34 and the groove 31 are T-shaped. The top of the front cover 2 extends toward the rear seat 3. A protrusion 21 is provided, with a second semi-circular groove 22 on its top surface, a second semi-circular hole 23 on its side surface, and a second slot 24 on its bottom surface. The second semi-circular groove 22 and the second semi-circular hole 23 are connected through the second slot 24. The protrusion 21 is inserted into the groove 31. The first semi-circular groove 32 and the second semi-circular groove 22 are aligned and closed to form the mounting groove 10. The first semi-circular hole 33 and the second semi-circular hole 23 are aligned and closed to form the guide hole 100. The first slot 34 and the second slot 24 are aligned and closed to form an inverted T-shaped groove. The transmission component 15 is a T-shaped component and is placed in the inverted T-shaped groove. Preferably, the connecting seam 20 between the groove 31 and the protrusion 21 is aligned with the axis of symmetry in the length direction of the pressing component 4. In this embodiment, the top of the inner wall of the mounting groove 10 extends upward from the top surface of the housing 1 to form an annular protrusion 101, and the outer side of the annular protrusion 101 is inclined. The annular protrusion 101 prevents water from flowing into the mounting groove 10.

[0029] The bottom side of the flexible sealing cap 5 is in sealing contact with the side of the mounting groove 10, the bottom surface of the flexible sealing cap 5 is in sealing contact with the bottom surface of the mounting groove 10, and the top of the flexible sealing cap 5 is in elastic deformation contact with the outer end of the transmission member 15 and the pressing member 4 respectively. Specifically, the flexible sealing cap 5 includes a sealing part 51 and an elastic deformation part 52. The elastic deformation part 52 is formed by a convex upward protrusion at the center of the sealing part 51. The sealing part 51 is annular and is sealed to the mounting groove 10. The elastic deformation part 52 is boss-shaped, with its top protruding from the top surface of the mounting groove 10. The bottom surface of the elastic deformation part 52 is provided with an upper recess 53. The outer end of the transmission member 15 is inserted into the upper recess 53 and abuts against the top and bottom surfaces of the elastic deformation part 52. The pressing member 4 abuts against the top surface of the elastic deformation part 52.

[0030] In this embodiment, the flexible sealing cap 5 is integrally molded from rubber or silicone. The bottom of the sealing part 51 abuts against the bottom surface of the mounting groove 10, the opening of the upper recess 53 faces the guide hole 100, and the outer periphery of the sealing part 51 and the side surface of the mounting groove 10 are interference-fitted. The elastic deformation part 52 is frustum-shaped, and the bottom diameter of the elastic deformation part 52 is larger than the top diameter. The outer end of the transmission member 15 abuts against the elastic deformation part 52 through a plane, arc surface, or spherical surface.

[0031] The pressing member 4 is sheet-shaped, with rotating parts 41 extending from both sides of one end. A limiting part 42 is provided on the outer side of the rotating part 41. Rotating grooves 6 are provided on both sides of the housing 1, with a convex shaft 61 at the center of each groove. A limiting groove 62 is provided on the outer side of each groove. The rotating part 41 engages with the corresponding rotating groove 6, and the limiting part 42 is placed within the limiting groove 62. The pressing member 4 rotates around the convex shaft 61 via the rotating part 41, and the limiting part 42 moves within the limiting groove 62 as the rotating part 41 rotates. When the spring 14 pushes the transmission member 15 outward, the outer end of the transmission member 15 abuts against the bottom surface of the pressing member 4 through the top of the flexible sealing cap 5. The pressing member 4 rotates upward until the limiting part 42 and one end of the limiting groove 62 abut against each other, thus limiting its movement.

[0032] In the working process of this utility model, pressing down on the pressing member 4 causes the pressing member 4 to rotate clockwise, deforming the elastic deformation part 52 and pressing down on the transmission member 15 through the elastic deformation part 52. The transmission member 15 moves down, causing the spring 14 to move down. The spring 14 causes the moving contact 121 of the second terminal 12 to move down and abut against the stationary contact 131 of the third terminal 13. At this time, there is electrical conductivity between the first terminal 11, the second terminal 12, and the third terminal 13. Releasing the pressing member 4 causes the spring 14 to move the moving contact 121 of the second terminal 12 away from the stationary contact 131 of the third terminal 13. The moving contact 121 and the stationary contact 131 are separated, and the power is cut off between the second terminal 12 and the third terminal 13. The spring 14 pushes the transmission member 15 upward, and the transmission member 15 is pushed back to its original position through the elastic deformation part 52. The elastic deformation part 52 also returns to its original deformation. During the above working process, the sealing part 51 maintains the sealing of the guide hole 100 to achieve the waterproof function.

[0033] The terms used in this utility model, such as "first," "second," etc., do not indicate any order, quantity, or importance, but are only used for distinction.

[0034] In this invention, terms such as "a" or "an" are used to indicate not a limitation on the quantity, but rather to indicate the existence of at least one of the mentioned objects.

[0035] In this utility model, terms indicating direction or location such as front end, rear end, top, bottom, side, longitudinal, transverse, middle, center, outside, inside, horizontal, vertical, left, right, above, below, etc., are used to indicate relative positions rather than absolute positions.

[0036] Terms used in this invention, such as "approximately," "overall," "approximately," and "similar," are limiting terms used to indicate features that exist but allow for certain deviations. The amount of deviation allowed may vary depending on the specific context.

Claims

1. An improved microswitch structure, comprising a housing (1) and a first terminal (11), a second terminal (12), a third terminal (13), a spring (14), a transmission member (15), and a pressing member (4) disposed within the housing (1). The second terminal (12) is rotatably disposed within the housing (1). One end of the spring (14) is electrically connected to the first terminal (11), and the other end of the spring (14) is electrically connected to the second terminal (12). The spring (14) has a tendency to move the moving contact (121) of the second terminal (12) and the stationary contact (131) of the third terminal (13) away from each other. The inner end of the transmission member (15) abuts against the spring (14). The housing (1) is provided with a guide hole (100) corresponding to the outer end of the transmission member (15). The pressing member (4) is rotatably connected to the housing (1). The characteristic of this structure is that... It also includes a flexible sealing cap (5). The outer surface of the housing (1) is provided with an installation groove (10) around the guide hole (100). The flexible sealing cap (5) is sealed in the installation groove (10). The flexible sealing cap (5) blocks the guide hole (100). The outer end of the transmission component (15) passes through the guide hole (100) and abuts against the flexible sealing cap (5), and the top of the flexible sealing cap (5) abuts against the pressing component (4).

2. The improved microswitch structure according to claim 1, characterized in that, The bottom side of the flexible sealing cap (5) and the side of the mounting groove (10) are in sealing contact. The bottom surface of the flexible sealing cap (5) and the bottom surface of the mounting groove (10) are in sealing contact. The top of the flexible sealing cap (5) is in elastic deformation contact with the outer end of the transmission component (15) and the pressing component (4) respectively.

3. The improved microswitch structure according to claim 1, characterized in that, The flexible sealing cap (5) includes a sealing part (51) and an elastic deformation part (52). The center of the sealing part (51) is raised to form the elastic deformation part (52). The sealing part (51) is annular and is sealed to the mounting groove (10). The elastic deformation part (52) is boss-shaped. The top of the elastic deformation part (52) protrudes from the top surface of the mounting groove (10). The bottom surface of the elastic deformation part (52) is provided with an upper recess (53). The outer end of the transmission member (15) is inserted into the upper recess (53) and abuts against the top and bottom surfaces of the elastic deformation part (52). The pressing member (4) abuts against the top surface of the elastic deformation part (52).

4. The improved microswitch structure according to claim 3, characterized in that, The bottom of the sealing part (51) abuts against the bottom surface of the mounting groove (10), the opening of the upper recess (53) faces the guide hole (100), and the outer periphery of the sealing part (51) and the side of the mounting groove (10) are interference fit.

5. The improved microswitch structure according to claim 3, characterized in that, The elastic deformation part (52) is truncated cone-shaped, with the bottom diameter of the elastic deformation part (52) being larger than the top diameter. The outer end of the transmission part (15) abuts against the elastic deformation part (52) through a plane, arc surface, or spherical surface.

6. The improved microswitch structure according to claim 1, characterized in that, The pressing part (4) is in the shape of a sheet. A rotating part (41) extends from one end of the pressing part (4) on both sides. A limiting part (42) is provided on the outside of the rotating part (41). A rotating groove (6) is provided on both sides of the housing (1). A convex shaft (61) is provided in the center of the rotating groove (6). A limiting groove (62) is provided on the outside of the rotating groove (6). The rotating part (41) is inserted into the corresponding rotating groove (6). The limiting part (42) is placed in the limiting groove (62). The pressing part (4) rotates around the convex shaft (61) through the rotating part (41). The limiting part (42) moves within the limiting groove (62) as the rotating part (41) rotates.

7. The improved microswitch structure according to claim 6, characterized in that, When the spring (14) pushes the transmission component (15) to move outward, the outer end of the transmission component (15) abuts against the top of the flexible sealing cap (5) and the bottom surface of the pressing component (4), and the pressing component (4) rotates upward until the limiting part (42) and one end of the limiting groove (62) abut against each other and are limited.

8. The improved microswitch structure according to claim 1, characterized in that, The housing (1) includes a front cover (2) and a rear seat (3), which are snap-fitted together. The front cover (2) covers the first terminal (11), the second terminal (12), the third terminal (13), the spring (14), and the transmission component (15) installed in the rear seat (3). The top of the rear seat (3) has a groove (31), the top surface of which has a first semi-circular groove (32), the side surface of which has a first semi-circular hole (33), and the bottom surface of which has a first slot (34). The first semi-circular groove (32) and the bottom surface of which have a first slot (34) are connected through the first semi-circular hole (33). The first slot (34) and the groove (31) are T-shaped. The top of the front cover (2) faces the rear seat (3). 3) Extending out a protrusion (21), the top surface of the protrusion (21) is provided with a second semi-circular groove (22), the side surface of the protrusion (21) is provided with a second semi-circular hole (23), the bottom surface of the protrusion (21) is provided with a second slot (24), the second semi-circular groove (22) and the second semi-circular hole (23) are connected through the second slot (24), the protrusion (21) is inserted into the groove (31), the first semi-circular groove (32) and the second semi-circular groove (22) are aligned and closed to form the mounting groove (10), the first semi-circular hole (33) and the second semi-circular hole (23) are aligned and closed to form the guide hole (100), the first slot (34) and the second slot (24) are aligned and closed to form an inverted T-shaped groove, the transmission component (15) is a T-shaped component, and the transmission component (15) is placed in the inverted T-shaped groove.

9. The improved microswitch structure according to claim 8, characterized in that, The joint (20) between the groove (31) and the protrusion (21) is aligned with the axis of symmetry along the length of the pressing part (4).

10. The improved microswitch structure according to claim 1, characterized in that, The top of the inner wall of the mounting groove (10) extends upward out of the top surface of the shell (1) and an annular protrusion (101) is formed thereon. The outer side of the annular protrusion (101) is inclined.

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