Dual contact anti-sticking microswitch

Abstract

The utility model discloses a double contact point anti -adhesion micro -switch relates to switch device field, concretely is a double contact point anti -adhesion micro -switch, including plug pin one, plug pin two, plug pin three, the upper end right side wall both sides of plug pin one are equipped with the spring piece, the spring piece right side wall middle is equipped with the overhang, the cantilever is located between plug pin two and plug pin three, and the double spring piece does the shunt and reduces contact contact instantaneous current too much, and the cantilever right -hand member is equipped with main contact, and the main contact right -hand member is equipped with auxiliary contact, and the main contact, auxiliary contact top is the plane, and the auxiliary contact is earlier than main contact and contacts plug pin, avoids main contact and bears arc alone, reduces the risk of adhesion, and the main contact left side is equipped with the crossbeam in the cantilever top, and the crossbeam middle is equipped with button no.

Description

Technical Field

[0001] This utility model relates to the field of switch device technology, specifically a dual-contact anti-sticking micro switch. Background Technology

[0002] As a key electronic component with tiny contact spacing and a fast-acting mechanism, microswitches are widely used in many fields such as electronics and mechanics due to their unique performance. The applications of microswitches cover multiple scenarios such as electronic equipment, mechanical equipment, smart homes, and industrial automation. The core functions are to realize position detection, status judgment, and action triggering. However, most existing microswitches are single-contact and are prone to sticking due to electric arcs and high temperatures, which affects subsequent use. To address this issue, we propose a dual-contact anti-sticking microswitch. Utility Model Content

[0003] This invention provides a dual-contact anti-sticking micro switch, which solves the problems mentioned in the background art.

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

[0005] A dual-contact anti-sticking micro switch includes an upper cover and a lower cover. The lower cover has three pins installed on its upper left, center, and right sides, respectively. Two spring contacts are symmetrically installed on the upper right side wall of pin one. A button is positioned above the top center of each spring contact. A cantilever is installed in the middle of the right side wall of each spring contact, with the cantilever located between the top of pin two and the bottom of pin three. A main contact is installed at the right end of the cantilever, and an auxiliary contact is installed at the right end of the main contact. The tops of the main and auxiliary contacts are flat. A crossbeam is positioned above the cantilever on the left side of the main contact. A button is installed in the middle of the crossbeam, with its bottom not exceeding the cantilever. A spring sleeve is slidably connected to the outer surface of button two, passing through the top of the upper cover and fixedly connected to it. A gap is left between button two and the spring sleeve, with a spring placed in the gap. Button two can be periodically pressed downwards to move the spring contacts and disengage the main and auxiliary contacts from the top of pin three.

[0006] Preferably, the button one is slidably connected to the top of the upper cover, and a pressing handle is provided on the left side of the button one on the top of the upper cover. Pressing the pressing handle downwards can move the button one downwards. When the button one moves downwards, the spring can move downwards and drive the main contact and auxiliary contact to disengage from the top of the third pin and contact the top of the second pin below.

[0007] Preferably, a rotating shaft is installed above the right end of the pressing handle, and a roller is rotatably connected to the rotating shaft.

[0008] Preferably, a buckle is installed on the upper part of the outer surface of the lower cover, and a slot is opened at the lower part of the outer surface of the lower cover, so that the buckle can be inserted into the slot when the upper cover and the lower cover are combined.

[0009] Preferably, the second button extends outward through the top of the spring sleeve. A push rod is provided above the second button, and a sloping top block is installed on the lower surface of the middle of the push rod. Fixed blocks are slidably connected to the left and right sides of the push rod. A sloping surface is provided on the top of the second button. When the push rod moves to the left, the sloping top block contacts the sloping surface on the top of the second button, causing the second button to move downward. When the push rod moves to the right, the second button moves upward.

[0010] Preferably, the right end of the push rod is rotatably connected to a connecting rod, and a pad is installed on one side of the connecting rod at the top of the upper cover. A motor is installed on the top of the pad, and an eccentric wheel is fixedly connected to the output shaft of the motor. The connecting rod is rotatably connected to the eccentric wheel on the side away from the center.

[0011] This utility model has the following beneficial effects:

[0012] 1. This dual-contact anti-sticking micro switch has two symmetrically mounted springs on the upper right side wall of pin one. A button is located above the top of the spring. A cantilever is installed in the middle of the right side wall of the spring. The cantilever is located between the top of pin two and the bottom of pin three. The double springs provide current shunting to reduce the instantaneous current from excessive contact. The main contact is installed at the right end of the cantilever, and the auxiliary contact is installed at the right end of the main contact. The tops of the main contact and the auxiliary contact are flat. Through the main contact and the auxiliary contact, the auxiliary contact contacts the pin before the main contact, avoiding the main contact being subjected to arc impact alone. At the same time, the flat top increases the contact area and reduces the risk of sticking.

[0013] 2. This dual-contact anti-sticking micro switch has a crossbeam above the cantilever on the left side of the main contact. A second button is installed in the middle of the crossbeam, and the bottom of the second button does not extend beyond the cantilever. A spring sleeve is slidably connected to the outer surface of the second button. The spring sleeve passes through the top of the upper cover and is fixedly connected to the upper cover. A gap is left between the second button and the spring sleeve, and a spring is placed in the gap. The second button can be pressed down periodically to move the spring and drive the main contact and auxiliary contact to disengage from the top of the pin three. By periodically pressing the second button down, the crossbeam is driven to move the cantilever on the right side of the spring downward, thereby disengaging the main contact and auxiliary contact from the top of the pin three, avoiding prolonged conduction and reducing the risk of sticking. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the lifting mechanism of this utility model;

[0016] In the diagram: 1. Top cover; 2. Bottom cover; 3. Press handle; 4. Rotating shaft; 5. Roller; 6. Button 1; 7. Pin 1; 8. Pin 2; 9. Pin 3; 10. Spring; 12. Main contact; 13. Auxiliary contact; 14. Button 2; 15. Crossbeam; 16. Spring sleeve; 17. Spring; 18. Buckle; 19. Mounting hole; 20. Fixing block; 21. Angled top block; 22. Push rod; 24. Connecting rod; 25. Eccentric wheel; 26. Motor; 27. Pad block. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1 This application provides a dual-contact anti-sticking micro switch, including an upper cover 1 and a lower cover 2. The lower cover 2 has three pins installed on its upper left, center, and right sides: a first pin 7, a second pin 8, and a third pin 9. Two spring pieces 10 are symmetrically installed on the upper right side wall of the first pin 7. A button 6 is located above the top center of each spring piece 10. A cantilever arm is installed in the middle of the right side wall of the spring piece 10, positioned between the top of the second pin 8 and below the top of the third pin 9. A main contact 12 is installed at the right end of the cantilever arm, and an auxiliary contact 13 is installed at the right end of the main contact 12. The top of the auxiliary contact 13 is flat. A crossbeam 15 is set above the cantilever on the left side of the main contact 12. A button 14 is installed in the middle of the crossbeam 15. The bottom of the button 14 does not exceed the cantilever. A spring sleeve 16 is slidably connected to the outer surface of the button 14. The spring sleeve 16 passes through the top of the upper cover 1 and is fixedly connected to the upper cover 1. A gap is left between the button 14 and the spring sleeve 16. A spring 17 is placed in the gap. The button 14 can be pressed down periodically to move the spring piece 10 and drive the main contact 12 and the auxiliary contact 13 to disengage from the top of the pin 9.

[0019] Based on the above, pin 1 7, pin 2 8, and pin 3 9 constitute the circuit terminals. The spring 10 acts as an elastic conductive element, connecting pin 1 7 and pin 3 9 to form a normally closed conductive path. The current of the spring 10 is transmitted to the main contact 12 and the auxiliary contact 13. When the two contacts are in contact with pin 3 9, the circuit is connected. The crossbeam 15 acts as a force transmission medium, transmitting the downward pressure of button 2 14 to the cantilever. The spring sleeve 16 restricts button 2 14 to slide only in the vertical direction (guiding function). The spring 17 is compressed when button 2 14 is pressed down (storing reset potential energy). When released, it pushes button 2 14 to reset. Periodically pressing button 2 14 can drive the cantilever to move down through the crossbeam 15, causing the main / auxiliary contacts to disengage from pin 3 9 and breaking the long-term conductive state.

[0020] Furthermore, the double contacts and double springs 10 achieve current shunting, avoiding the single contact from bearing a large instantaneous current and reducing the generation of electric arcs. The top plane of the contact increases the contact area, reduces the current density per unit area, and reduces the accumulation of local high temperature, thus reducing the risk of adhesion from the source. The cooperation between the spring sleeve 16 and the spring 17 ensures that the button 2 14 operates stably and resets reliably, avoiding incomplete contact separation due to movement deviation. The crossbeam 15 can evenly transmit downward pressure, preventing excessive local deformation of the cantilever and extending the service life of the springs 10.

[0021] Please see Figure 1 Button 16 is slidably connected to the top of the upper cover 1. A pressing handle 3 is provided on the left side of button 16 at the top of the upper cover 1. Pressing the pressing handle 3 downwards can move button 16 downwards. The downward movement of button 16 can move the spring 10 downwards and drive the main contact 12 and auxiliary contact 13 to disengage from the top of the pin 39 and contact the top of the lower pin 28.

[0022] Based on the above, the sliding connection between button 6 and the upper cover 1 ensures that it moves only in the vertical direction. The pressing handle 3, as a manual operation component, uses the lever principle (with the contact point with the upper cover 1 as the fulcrum) to convert the downward pressing force into a force that pushes button 6 down. After button 6 moves down, it directly squeezes the top of the middle of the spring 10, causing the spring 10 to undergo elastic deformation, which drives the right cantilever to move down synchronously, realizing the switching of the main / auxiliary contact from contact pin 3 9 to contact pin 2 8, and completing the change of the circuit loop.

[0023] Furthermore, the operation path is clear, allowing for quick circuit switching and adapting to scenarios requiring manual intervention. The combination of sliding connection and lever principle reduces the effort required for operation, improves ease of use, and ensures precise contact switching, preventing accidental triggering that could cause circuit malfunctions.

[0024] Please see Figure 1 A rotating shaft 4 is installed above the right end of the pressing handle 3, and a roller 5 is rotatably connected to the rotating shaft 4.

[0025] Based on the above, the rotating shaft 4 provides rotational support for the roller 5, allowing the roller 5 to rotate freely around the rotating shaft 4. When the pressing handle 3 contacts external components (such as mechanical transmission rods or operation panels), the roller 5 directly contacts the external components. During the pressing process, the relative motion between the external components and the roller 5 is converted into the rolling (rather than sliding) of the roller 5, reducing the friction between the two.

[0026] Furthermore, it significantly reduces frictional wear between the pressing handle 3 and external components, extends the service life of the pressing handle 3 and external components, has low rolling friction resistance, reduces the feeling of sticking when pressing, improves the smoothness of operation, and the rotation of the roller 5 can adapt to slight positional deviations of external components, avoiding damage to the pressing handle 3 due to uneven force caused by misalignment.

[0027] Please see Figures 1 to 2 The upper part of the outer surface of the lower cover 2 is equipped with a buckle 18, and the lower part of the outer surface of the lower cover 2 is provided with a slot. The upper cover 1 and the lower cover 2 can be installed together with the buckle 18 and enter the slot.

[0028] Based on the above, the buckle 18 is a flexible protruding structure, and the slot is a groove structure that matches the shape of the buckle 18. During assembly, the upper cover 1 is aligned with the lower cover 2 and fastened. The buckle 18 undergoes elastic deformation under pressure, enters the slot, and returns to its original shape, thus fixing the upper and lower covers by snapping them together.

[0029] Furthermore, no additional fasteners are required, assembly and disassembly are convenient, reducing production and maintenance costs. The elastic snap-fit ​​of the 18 clips provides a firm hold and can withstand certain vibrations and impacts, preventing the upper and lower covers from separating during use.

[0030] Please see Figures 1 to 2 Button 2 14 extends outward through the top of spring sleeve 16. A push rod 22 is provided above button 2 14. An inclined top block 21 is installed on the lower surface of the middle of push rod 22. Fixed blocks 20 are slidably connected to the left and right sides of push rod 22. An inclined surface is opened on the top of button 2 14. When push rod 22 moves to the left, the inclined top block 21 contacts the inclined surface of the top of button 2 14 and moves button 2 14 downward. When push rod 22 moves to the right, button 2 14 moves upward.

[0031] Based on the above, the fixing block 20 is fixed to the top of the upper cover 1 to provide a horizontal sliding guide for the push rod 22, ensuring that the push rod 22 moves only in the left and right directions. The bottom surface of the inclined top block 21 and the inclined surface of the top of the button 24 are complementary structures (the inclined surface angles match). When the push rod 22 slides to the left, the inclined top block 21 slides along the inclined surface of the button 24, converting the horizontal pushing force into a vertical downward pressure, pushing the button 24 down along the spring sleeve 16. When the push rod 22 slides to the right, the inclined top block 21 disengages from the inclined surface of the button 24, and the button 24 moves upward under the restoring force of the spring 17, returning to its initial position.

[0032] Furthermore, the inclined plane transmission structure (inclined top block 21 + inclined plane of button 2 14) can efficiently realize the conversion from horizontal to vertical motion, with high transmission efficiency and no obvious power loss. The guiding effect of the fixed block 20 ensures the stability of the sliding path of the push rod 22, avoids misalignment between the inclined top block 21 and the inclined plane of button 2 14, and improves the reliability of automatic triggering. The up and down movement of button 2 14 is controlled only by the horizontal sliding of the push rod 22. The action logic is simple and easy to cooperate with the subsequent motor drive structure.

[0033] Please see Figures 1 to 2 The right end of the push rod 22 is rotatably connected to the connecting rod 24. A pad 27 is installed on one side of the connecting rod 24 at the top of the upper cover 1. A motor 26 is installed on the top of the pad 27. The output shaft of the motor 26 is fixedly connected to an eccentric wheel 25. The eccentric wheel 25 is rotatably connected to the connecting rod 24 on the side away from the center.

[0034] Based on the above, the pad 27 provides a fixed support for the motor 26, ensuring that the output shaft of the motor 26 is coaxial with the center of the eccentric wheel 25. After the motor 26 starts, the output shaft drives the eccentric wheel 25 to make a circular motion around the center. The side of the eccentric wheel 25 away from the center is rotatably connected to the connecting rod 24. During the circular motion, a reciprocating displacement will occur. The reciprocating sliding of the push rod 22, through the cooperation of the inclined top block 21 and the button 2 14, realizes the automatic up and down movement of the button 2 14, thereby driving the main / auxiliary contacts to periodically disengage from the pin 3 9.

[0035] Furthermore, the motor 26 can be automatically triggered, and the motor start-up cycle can be controlled by a preset program (e.g., once every 10-30 minutes), making it suitable for scenarios such as industrial automation and smart homes that do not require manual intervention. The transmission structure of the eccentric wheel 25 and connecting rod 24 is stable, which can accurately convert the circular motion into the horizontal reciprocating motion of the push rod 22 with small transmission error, ensuring the consistency of the contact point disengagement action. The pad 27 can adjust the installation height of the motor 26, ensuring that the connection angle between the connecting rod 24 and the push rod 22 and eccentric wheel 25 is reasonable, avoiding transmission jamming, and improving the compatibility of the overall structure.

[0036] In summary, this dual-contact anti-sticking micro switch allows for manual circuit switching by pressing the handle 3, which moves the spring 10 downward via button 6, switching the main / auxiliary contacts to pin 8. For automatic anti-sticking, the motor 26 starts according to a preset cycle, driving the push rod 22 to slide left and right via the eccentric wheel 25 and connecting rod 24. The inclined block 21 then engages with the inclined surface of button 14, pushing button 14 downward. This, in turn, moves the cantilever downward via the crossbeam 15, periodically disengaging the main / auxiliary contacts from pin 9, briefly disconnecting the circuit before resetting. This prevents prolonged conduction leading to sticking, and the earlier contact of the auxiliary contacts and the increased release area further reduce the risk of sticking.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-contact anti-sticking micro switch, comprising an upper cover (1) and a lower cover (2), wherein the lower cover (2) is respectively equipped with a first pin (7), a second pin (8), and a third pin (9) on the upper left, middle, and right sides, characterized in that: The upper right side wall of the first pin (7) is symmetrically equipped with spring pieces (10). A button (6) is set above the middle top of the spring piece (10). A cantilever is installed in the middle of the right side wall of the spring piece (10). The cantilever is located between the top of the second pin (8) and the bottom of the third pin (9). A main contact (12) is installed at the right end of the cantilever. An auxiliary contact (13) is installed at the right end of the main contact (12). The tops of the main contact (12) and the auxiliary contact (13) are flat. A crossbeam (15) is set above the cantilever on the left side of the main contact (12). A second button (14) is installed in the middle of the crossbeam (15). The bottom of the second button (14) does not exceed the cantilever. A spring sleeve (16) is slidably connected to the outer surface of the second button (14). The spring sleeve (16) passes through the top of the upper cover (1) and is fixedly connected to the upper cover (1). There is a gap between the second button (14) and the spring sleeve (16). A spring (17) is placed in the gap. The second button (14) can be pressed down periodically to move the spring piece (10) and drive the main contact (12) and auxiliary contact (13) to disengage from the top of the pin three (9).

2. The dual-contact anti-sticking micro switch according to claim 1, characterized in that: The button (6) is slidably connected to the top of the cover (1). The left side of the button (6) is provided with a pressing handle (3) on the top of the cover (1). Pressing the pressing handle (3) downwards can cause the button (6) to move downwards. The downward movement of the button (6) can cause the spring (10) to move downwards and drive the main contact (12) and auxiliary contact (13) to disengage from the top of the pin three (9) and contact the top of the pin two (8) below.

3. The dual-contact anti-sticking micro switch according to claim 2, characterized in that: A rotating shaft (4) is installed above the right end of the pressing handle (3), and a roller (5) is rotatably connected to the rotating shaft (4).

4. The dual-contact anti-sticking micro switch according to claim 3, characterized in that: The lower cover (2) has a buckle (18) installed on the upper part of its outer surface, and a slot is provided on the lower part of its outer surface. The upper cover (1) and the lower cover (2) can be fitted together with the buckle (18) and enter the slot.

5. The dual-contact anti-sticking micro switch according to claim 4, characterized in that: The second button (14) extends outward through the top of the spring sleeve (16). A push rod (22) is provided above the second button (14). A sloping top block (21) is installed on the lower surface of the middle of the push rod (22). Fixed blocks (20) are slidably connected to the left and right sides of the push rod (22). A sloping surface is opened on the top of the second button (14). When the push rod (22) moves to the left, the sloping top block (21) contacts the sloping surface on the top of the second button (14) and the second button (14) moves downward. When the push rod (22) moves to the right, the second button (14) moves upward.

6. The dual-contact anti-sticking micro switch according to claim 5, characterized in that: The right end of the push rod (22) is rotatably connected to a connecting rod (24). A pad (27) is installed on one side of the connecting rod (24) at the top of the upper cover (1). A motor (26) is installed on the top of the pad (27). An eccentric wheel (25) is fixedly connected to the output shaft of the motor (26). The connecting rod (24) is rotatably connected to the eccentric wheel (25) on the side away from the center.

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