Microswitch

Abstract

The microswitch comprises a base, an upper cover, a pressing rod, a first pin, a second pin, a third pin and a movable contact piece, the first pin, the second pin and the third pin are connected with the base in a penetrating mode, the pressing rod penetrates through the upper cover and is movably connected with the upper cover, the microswitch further comprises a tension spring and a swing piece, the top of the third pin is provided with an upper contact piece, and the top of the third pin is provided with a lower contact piece. The top of the first pin is provided with an upper contact piece located below the first pin, the top of the second pin is provided with a lower contact piece located below the upper contact piece, the movable contact piece is located between the upper contact piece and the lower contact piece, one end of the movable contact piece is in swing connection with one side of the first pin, the swing piece is in swing connection with the other side of the first pin, and the tension spring is connected with the swing piece and the movable contact piece. The swing piece and the pressing rod are arranged in a linkage mode. The microswitch provided by the utility model is high in stroke and not easy to touch by mistake.

Description

Technical Field

[0001] This utility model relates to the field of electronic component technology, specifically to a micro switch. Background Technology

[0002] A micro switch is a type of switch with a small contact gap and a quick-acting mechanism. It operates by using a specified stroke and force to perform the switching action. It is covered by a housing and has a drive rod on the outside. Because the contact gap of the switch is relatively small, it is called a micro switch, also known as a sensitive switch.

[0003] Existing microswitches have too short a travel and too high sensitivity, making them prone to accidental activation and unsuitable for high-security scenarios. Utility Model Content

[0004] In summary, to overcome the shortcomings of the prior art, this utility model provides a micro switch with a high stroke that is less prone to accidental activation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a micro switch, comprising a base, a top cover, a pressing rod, a first pin, a second pin, a third pin, and a movable contact piece. The first pin, the second pin, and the third pin are connected through the base. The pressing rod is connected movably through the top cover. The switch also includes a tension spring and a swing plate. The top of the third pin is provided with an upper contact piece, and the top of the second pin is provided with a lower contact piece located below the upper contact piece. The movable contact piece is located between the upper contact piece and the lower contact piece. One end of the movable contact piece is oscillatingly connected to one side of the first pin, and the swing plate is oscillatingly connected to the other side of the first pin. The tension spring connects the swing plate and the movable contact piece. The swing plate is linked to the pressing rod.

[0006] With this configuration, one end of the moving contact abuts against the upper contact of the third pin, while the other end is located between the second and first pins. The opposing sway bar is positioned away from the three pins. When the push rod is pressed, the sway bar swings on the first pin, causing one end of the tension spring connected to it to lower in height. As it moves, the distance between the connection points at both ends of the tension spring increases, and the spring length is stretched. When the height of this end is pressed below the other end, the moving contact connected to the other end of the tension spring disengages from the upper contact and is pressed onto the lower contact by the tension spring, thus completing the switch action. When the push rod is released, the sway bar is pulled back to its original position by the tension spring, pushing the push rod back and simultaneously causing the moving contact to disengage from the lower contact and reconnect to the upper contact. This structure, with the push rod located outside the three pins, provides a longer pressing stroke, greater stability, and reduces the risk of accidental activation.

[0007] Furthermore, the connection point between the swing plate and the third pin is located below the connection point between the movable contact plate and the first pin. The swing plate is provided with a first clearance groove adapted to the tension spring, the movable contact plate is provided with a second clearance groove adapted to the tension spring, and the first pin is provided with a third clearance groove adapted to the tension spring.

[0008] With this configuration, when the pressing rod moves together with the swing plate and the moving contact plate, the tension spring will move between the first clearance groove, the second clearance groove and the third clearance groove, and will not be blocked by the two, affecting the function of the tension spring, thus ensuring structural stability.

[0009] Furthermore, each of the two sides of the movable contact plate facing the first pin is provided with a first connector, and the first pin is provided with a first slot corresponding to the position of the first connector. Each of the two sides of the swing plate facing the first pin is provided with a second connector, and the first pin is provided with a second slot corresponding to the position of the second connector.

[0010] With this configuration, the two first connectors on the moving contact will be inserted into the first slots on the first pin, and the two second connectors on the swing plate will be inserted into the second slots on the first pin. After insertion, the two connectors will be held together by a tension spring to press them tightly against the first pin. The moving contact will press against the upper contact in the upward direction, and the swing plate will press against the pressing rod in the upward direction. The structure is stable and easy to install.

[0011] Furthermore, the first pin has a swing groove on the side facing the moving contact piece, the bottom surface of the swing groove is adapted to the thickness of the moving contact piece, and the upper and lower sides of the swing groove are widened towards the moving contact piece.

[0012] With this configuration, the moving contact piece will be inserted into the swing slot to prevent it from sliding up and down, while the flared opening of the swing slot can limit the swing angle of the moving contact piece, making its movement more stable.

[0013] Furthermore, the first pin has a bending area at the position of the second slot, and the connection position between the swing plate and the first pin is located at the top of the bending area.

[0014] With this configuration, the swing plate will abut against the bending area, preventing it from sliding down, while the upward sliding direction will abut against the top surface of the second slot, resulting in a simple and stable structure.

[0015] Furthermore, locking blocks are provided on both sides of the connection position between the first pin and the base, and the upper cover is provided with a pressing block that fits against the top of the first pin.

[0016] With this configuration, the locking block will press against the base from below to prevent the first pin from sliding down, while the pressure block on the top cover will press down on the top of the first pin from above, thereby enhancing the stability of the first pin. In this way, the first pin will not shake under the combined movement of various parts such as the swing plate, moving contact plate, and tension spring, making the structure more stable.

[0017] Furthermore, the bottom of the pressing rod is provided with a connecting rod whose width is smaller than the diameter of the main body of the pressing rod, and the end of the swing plate facing the pressing rod is provided with a pressing groove that is adapted to the connecting rod.

[0018] With this configuration, the pressing groove on the swing plate will be inserted into both sides of the connecting rod and connected to it. In this way, the swing plate can press against the upper part of the pressing rod from below. When the pressing rod is pressed down, the swing plate will be pressed down together. The structure is simple, and using a narrow connecting rod instead of a large diameter connecting block to press it down can reduce its size and avoid increasing the overall size of the switch.

[0019] Furthermore, the end of the swing plate facing the pressing rod is provided with a bent head that bends away from the head of the pressing rod.

[0020] This design ensures that the bend in the lever is pressed against the pressure bar, preventing sharp edges from contacting the lever and causing it to cut into the parts, thus making the pressing process smoother.

[0021] Furthermore, the base is provided with a positioning groove that is adapted to the connecting rod.

[0022] With this design, the positioning groove provides a sliding limit for the pressing rod, guiding the pressing process of the pressing rod. This ensures that even if the stroke increases, there will be no shaking or deviation, and the structure remains stable.

[0023] Furthermore, the movable contact piece is provided with a connecting hole for connecting the connecting hook of the tension spring.

[0024] With this configuration, the swing plate can hook the spring's hook between the pressing groove and the second clearance groove, while the moving contact plate hooks into the connecting hole. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0026] Figure 2 This is a cross-sectional view of an embodiment of the present utility model.

[0027] Figure 3 This is a schematic diagram of the pin installation according to an embodiment of the present invention.

[0028] Figure 4 for Figure 3 Exploded view.

[0029] The labels in the diagram mean: 1. Base, 101. Positioning groove, 2. Top cover, 201. Pressure block, 3. Pressing rod, 301. Connecting rod, 4. First pin, 401. First slot, 402. Second slot, 403. Swinging slot, 404. Bending area, 405. Positioning block, 406. Third clearance groove, 5. Second pin, 501. Lower contact piece, 6. Third pin, 601. Upper contact piece, 7. Moving contact piece, 701. Second clearance groove, 702. First connector, 703. Connecting hole, 8. Tension spring, 9. Swing piece, 901. First clearance groove, 902. Second connector, 903. Pressing groove, 904. Bending head. Detailed Implementation

[0030] This specific embodiment is merely an explanation of the present embodiment and is not intended to limit the present embodiment. After reading this specification, those skilled in the art can make modifications to the present embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present embodiment.

[0031] Referring to the accompanying drawings, this utility model provides the following technical solution: a micro switch, including a base 1, a top cover 2, a pressing rod 3, a first pin 4, a second pin 5, a third pin 6, and a movable contact 7. The first pin 4, the second pin 5, and the third pin 6 are connected through the base 1. The pressing rod 3 is connected to the top cover 2 through it. The switch also includes a tension spring 8 and a swing plate 9. The top of the third pin 6 is provided with an upper contact plate 601. The top of the second pin 5 is provided with a lower contact plate 501 located below the upper contact plate 601. The movable contact 7 is located between the upper contact plate 601 and the lower contact plate 501. One end of the movable contact 7 is oscillatingly connected to one side of the first pin 4. The swing plate 9 is oscillatingly connected to the other side of the first pin 4. The tension spring 8 connects the swing plate 9 and the movable contact 7. The swing plate 9 is linked to the pressing rod 3.

[0032] With this configuration, one end of the movable contact 7 abuts against the upper contact 601 of the third pin 6, while the other end is located between the second pin 5 and the first pin 4. The opposing swing piece 9 is positioned away from the three pins. When the pressing rod 3 is pressed, the swing piece 9 swings along the first pin 4. During this swing, one end of the tension spring 8 connected to it is lowered. Simultaneously, the distance between the connection points at both ends of the tension spring 8 increases, stretching the spring 8 and lowering its height at that end. When pressed down to the bottom of the other end, the movable contact 7, which is connected to the other end of the tension spring 8, will disengage from the upper contact 601 and be pressed onto the lower contact 501 by the tension spring 8, thus completing the switch action. When released, the sway bar 9 will be pulled back to its original position by the tension spring 8, pushing the pressing rod 3 back, and at the same time, the movable contact 7 will disengage from the lower contact 501 and reconnect to the upper contact 601. With this structure, the pressing rod 3 is located outside the three pins, the pressing stroke is longer, more stable, and less prone to accidental activation.

[0033] In this preferred embodiment, the connection point between the swing plate 9 and the third pin 6 is located below the connection point between the moving contact plate 7 and the first pin 4. The swing plate 9 is provided with a first clearance groove 901 adapted to the tension spring 8, the moving contact plate 7 is provided with a second clearance groove 701 adapted to the tension spring 8, and the first pin 4 is provided with a third clearance groove 406 adapted to the tension spring 8.

[0034] With this configuration, when the pressing rod 3 moves together with the swing plate 9 and the moving contact plate 7, the tension spring 8 will move between the first clearance groove 901, the second clearance groove 701 and the third clearance groove 406, and will not be blocked by the two, affecting the function of the tension spring 8, thus ensuring structural stability.

[0035] In a preferred embodiment, the movable contact piece 7 is provided with a first connector 702 on each side of the end facing the first pin 4, and the first pin 4 is provided with a first slot 401 corresponding to the position of the first connector 702. The swing piece 9 is provided with a second connector 902 on each side of the end facing the first pin 4, and the first pin 4 is provided with a second slot 402 corresponding to the position of the second connector 902.

[0036] With this configuration, the two first connectors 702 on the movable contact 7 will be inserted into the first slot 401 on the first pin 4, and the two second connectors 902 on the swing plate 9 will be inserted into the second slot 402 on the first pin 4. After insertion, the two will be held together by the tension spring 8 to press the first pin 4 tightly. The movable contact 7 will press against the upper contact 601 in the upward direction, and the swing plate 9 will press against the pressing rod 3 in the upward direction. The structure is stable and easy to install.

[0037] In a preferred embodiment, the first pin 4 is provided with a swing groove 403 on the side facing the movable contact piece 7. The bottom surface of the swing groove 403 is adapted to the thickness of the movable contact piece 7, and the upper and lower sides of the swing groove 403 are flared towards the movable contact piece 7.

[0038] With this configuration, the movable contact 7 will be inserted into the swing slot 403 to prevent it from sliding up and down. The flared opening of the swing slot 403 can limit the swing angle of the movable contact 7, making its movement more stable.

[0039] In this preferred embodiment, the first pin 4 is provided with a bending area 404 at the position of the second slot 402, and the connection position of the swing piece 9 and the first pin 4 is located at the top of the bending area 404.

[0040] With this configuration, the swing piece 9 will abut against the bending area 404, thus preventing it from sliding down, while the upward sliding direction will abut against the top surface of the second slot 402, resulting in a simple and stable structure.

[0041] In this preferred embodiment, locking blocks 405 are provided on both sides of the connection position between the first pin 4 and the base 1, and the upper cover 2 is provided with a pressing block 2 that fits against the top of the first pin 4.

[0042] With this configuration, the locking block 405 will press against the base 1 from below to prevent the first pin 4 from sliding down, while the pressure block 2 on the top cover 2 will press down on the top of the first pin 4 from above, thereby enhancing the stability of the first pin 4. In this way, the first pin 4 will not shake under the combined movement of various parts such as the swing plate 9, the moving contact plate 7, and the tension spring 8, making the structure more stable.

[0043] In this preferred embodiment, the bottom of the pressing rod 3 is provided with a connecting rod 301 whose width is smaller than the diameter of the main body of the conveying pressing rod 3, and the end of the swing plate 9 facing the pressing rod 3 is provided with a pressing groove 903 that is adapted to the connecting rod 301.

[0044] With this configuration, the pressing groove 903 on the swing plate 9 will be inserted into both sides of the connecting rod 301 and connected to it. In this way, the swing plate 9 can press against the upper part of the pressing rod 3 from below. When the pressing rod 3 is pressed down, the swing plate 9 will be pressed down together. The structure is simple. Using a connecting rod 301 with a small width instead of a connecting block with a large diameter can reduce its size and avoid increasing the overall size of the switch.

[0045] In this preferred embodiment, the end of the swing plate 9 facing the pressing rod 3 is provided with a bent head 904 that bends away from the head of the pressing rod 3.

[0046] This design ensures that the bend in the lever 3 is pressed against the corner, preventing sharp edges from contacting the lever and causing it to cut into the parts, thus making the pressing process smoother.

[0047] In this preferred embodiment, the base 1 is provided with a positioning groove 1 that is adapted to the connecting rod 301.

[0048] With this configuration, the positioning groove 1 will provide a sliding limit for the pressing rod 3, and play a guiding role in the pressing process of the pressing rod 3. In this way, even if the stroke increases, there will be no shaking or deviation, and the structure will be stable.

[0049] In this preferred embodiment, the movable contact piece 7 is provided with a connecting hole 703 for connecting the connecting hook of the tension spring 8.

[0050] With this configuration, the swing plate 9 can hook the hook of the tension spring 8 between the pressing groove 903 and the second clearance groove 701, while the moving contact plate 7 hooks into the connecting hole 703.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be included within the scope of protection of the present invention.

Claims

1. A micro switch, comprising a base, a top cover, a pressing rod, a first pin, a second pin, a third pin, and a moving contact, wherein the first pin, the second pin, and the third pin are connected through the base, and the pressing rod is movably connected through the top cover, characterized in that: It also includes a tension spring and a swing plate. The top of the third pin is provided with an upper contact plate, and the top of the second pin is provided with a lower contact plate located below the upper contact plate. The movable contact plate is located between the upper contact plate and the lower contact plate. One end of the movable contact plate is oscillatingly connected to one side of the first pin, and the swing plate is oscillatingly connected to the other side of the first pin. The tension spring connects the swing plate and the movable contact plate, and the swing plate is linked to the pressing rod.

2. A micro switch according to claim 1, characterized in that: The connection point between the swing plate and the third pin is located below the connection point between the movable contact plate and the first pin. The swing plate is provided with a first clearance groove adapted to the tension spring, the movable contact plate is provided with a second clearance groove adapted to the tension spring, and the first pin is provided with a third clearance groove adapted to the tension spring.

3. A micro switch according to claim 1, characterized in that: The movable contact plate has a first connector on each side of the end facing the first pin, and the first pin has a first slot corresponding to the position of the first connector. The swing plate has a second connector on each side of the end facing the first pin, and the first pin has a second slot corresponding to the position of the second connector.

4. A micro switch according to claim 3, characterized in that: The first pin has a swing groove on the side facing the moving contact piece. The bottom surface of the swing groove is adapted to the thickness of the moving contact piece, and the upper and lower sides of the swing groove are widened towards the moving contact piece.

5. A micro switch according to claim 3, characterized in that: The first pin has a bending area at the position of the second slot, and the connection position between the swing plate and the first pin is located at the top of the bending area.

6. A micro switch according to claim 1, characterized in that: The first pin has locking blocks on both sides of the connection position with the base, and the top cover has a pressing block that fits against the top of the first pin.

7. A micro switch according to claim 1, characterized in that: The bottom of the pressing rod is provided with a connecting rod whose width is smaller than the diameter of the main body of the pressing rod. The end of the swing plate facing the pressing rod is provided with a pressing groove that is adapted to the connecting rod.

8. A micro switch according to claim 7, characterized in that: The end of the swing plate facing the pressing rod is provided with a bent head that bends away from the head of the pressing rod.

9. A micro switch according to claim 7, characterized in that: The base is provided with a positioning groove that is adapted to the connecting rod.

10. A micro switch according to claim 7, characterized in that: The movable contact piece is provided with a connecting hole for connecting the connecting hook of the tension spring.

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