Dustproof limit switch easy to disassemble

Abstract

The utility model relates to the technical field of limit switch, specifically disclose a dustproof easy to disassemble limit switch, including fixed base, the side surface of fixed base is passed through and is provided with line, the one end of fixed base away from line is fixedly provided with the plug male seat, the inside fixed setting of plug male seat has the metal column inner recess contact point, the elastic energized contact and metal column inner recess contact point are concentric design. The dustproof easy to disassemble limit switch, when the limit switch failure damage can be hand press elasticity and insert the strip, make elasticity and insert the strip and the slot disengagement, can make the plug male seat and switch shell separate, let switch shell can separate with fixed base fast, and can make metal column inner recess contact point and elastic energized contact separate, make switch shell can remove from the machine fast and conveniently without too much space, and the inconvenience of wiring and screwing is saved, greatly improved the convenience when overhauling.

Description

Technical Field

[0001] This utility model relates to the field of limit switch technology, specifically a dustproof and easy-to-disassemble limit switch. Background Technology

[0002] Limit switches are common low-current electrical appliances, also known as position switches. They are mainly used to control the travel and limit protection of mechanical equipment to prevent derailment and falling due to excessive displacement. There are many models of limit switches on the market, and you can choose the appropriate one according to your needs. However, existing limit switches have some inconveniences in use. When installing or removing limit switches on a device, screws need to be removed and installed. The internal installation space of the device is small, which further reduces the operating space of the limit switch. It is also necessary to pull out and connect the wires inside the device. At the same time, there is a risk of short circuits or damage due to dust entering the housing. Installation and use are extremely inconvenient. Utility Model Content

[0003] The purpose of this utility model is to provide a dustproof and easy-to-disassemble limit switch to solve the problems mentioned in the background art, such as the limit switch being difficult to disassemble and wire and easily damaged by dust, oil and other contaminants.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a dustproof and easily detachable limit switch, comprising a fixed base, wherein a circuit is provided through the side surface of the fixed base, and the fixed base is fixed to the outer surface of the machine. A plug and male socket are fixedly provided at the end of the fixed base away from the circuit, and the plug and male socket is inserted into the switch housing. A built-in micro switch is snapped into the inside of the switch housing. A metal post recessed contact is fixedly provided inside the plug and male socket, and one end of the metal post recessed contact does not exceed the side surface of the plug and male socket. A flexible energized contact is fixedly installed inside the switch housing, and one end of the flexible energized contact is located on the outside of the switch housing. The flexible energized contact and the metal post recessed contact are concentrically designed, and the outer surface of the metal post recessed contact is in contact with the outer surface of one end of the flexible energized contact.

[0005] Preferably, a limiting anti-fool block is fixedly installed inside the switch housing, and the limiting anti-fool block is inserted into the plug socket, and the plug socket is engaged with the limiting anti-fool block. A dustproof ring is embedded in the inner surface of the switch housing, and the outer surface of the dustproof ring is tightly fitted to the outer surface of the plug socket.

[0006] By adopting the above technical solution, the limit anti-misalignment block can effectively prevent incorrect insertion of the switch housing and the plug socket, which would lead to incorrect connection between the metal post recessed contact and the elastic conductive contact. This reduces the signal triggering errors caused by incorrect insertion. At the same time, the use of the dustproof ring can prevent oil or dust from entering between the switch housing and the plug socket, which would lead to poor contact between the metal post recessed contact and the elastic conductive contact, thus improving the correctness and stability of the insertion connection during use.

[0007] Preferably, a circuit board is fixedly installed inside the fixed base, and the circuit board inside the fixed base connects the circuit to the recessed contact of the metal column. An inspection top cover is snapped onto the outer surface of the fixed base, and a sealing gasket is provided between the inspection top cover and the fixed base.

[0008] By adopting the above technical solution, the wiring inside the fixed base can be maintained and inspected by opening the inspection cover, which facilitates inspection and maintenance during subsequent maintenance. In case of broken or damaged wiring, it can be easily replaced without replacing the entire fixed base.

[0009] Preferably, a connecting wire lug is fixedly pressed on the outer surface of the built-in micro switch, and the connecting wire lug is connected to the elastic energized contact. An adjustment top cover is fixedly installed on one end of the switch housing near the built-in micro switch, and a sealing gasket is provided between the adjustment top cover and the switch housing.

[0010] By adopting the above technical solution, the top cover can be disassembled, and the position of the wiring on the built-in micro switch can be adjusted by adjusting the connection wire lug. This facilitates the adjustment of the opening and closing state of the limit switch, and allows for easy replacement of the built-in micro switch when it is damaged, without the need to replace the entire switch, thus greatly reducing the cost of use.

[0011] Preferably, elastic inserts are fixedly installed on both sides of the fixed base, and the length of the elastic inserts is aligned with one side of the plug socket. Slots are fixedly installed on both sides of the switch housing, and the slots and elastic inserts are concentrically designed, with the elastic inserts engaging with the slots. An auxiliary fixing device is provided between the fixed base and the switch housing.

[0012] By adopting the above technical solution, the insertion strength between the switch housing and the plug socket can be further improved through the insertion of the elastic insert and the slot. This reduces the poor contact between the metal post recessed contact and the elastic energized contact caused by the loosening of the switch housing and the plug socket during the use of the limit switch, and further improves the stability of the limit switch during use.

[0013] Preferably, the auxiliary fixing device includes: a positioning base plate, which is slidably inserted into the outer surface of the fixing base. The positioning base plate is provided with a pin slot at the end away from the plug socket, and the pin slot is arrow-shaped. Limiting engagement films are fixedly installed on both sides of the switch housing near the end of the built-in micro switch, and the limiting engagement films are engaged with the pin slots, and the pin slots are engaged with the limiting engagement films.

[0014] By adopting the above technical solution, the switch housing can be fixed on the outer surface of the positioning base plate by inserting the pin slot and the limiting insertion soft film. After the switch housing is pushed and inserted into the plug socket, the positioning base plate can be further moved and inserted into the interior of the fixed base. With the insertion of the elastic strip and the slot, the insertion of the switch housing and the plug socket can further enhance the firmness of the limit switch after installation.

[0015] Preferably, a rotating shaft is rotatably mounted on the end of the switch housing away from the dustproof ring, and a push cam is engaged with the outer surface of the rotating shaft. A return torsion spring is inserted between the push cam and the switch housing. The push cam and the rotating shaft are fixed by a set screw. A plunger is slidably mounted on one side inside the switch housing, and the outer surface of the plunger is in contact with the outer surface of the push cam. A sealing ring is provided between the switch housing and the rotating shaft. A spline is provided on the end of the rotating shaft located outside the switch housing. The rotating shaft is engaged with a ball swing rod, and the ball swing rod is fixed to the rotating shaft by a screw. An inspection port and a cover plate are provided on the side of the switch housing near the ball swing rod.

[0016] By adopting the above technical solution, when the plunger, shaft, push cam, or return torsion spring is worn, fails, or is broken, the cover plate can be removed and the push cam can be loosened to remove the shaft. This facilitates the removal and maintenance or replacement of the plunger, shaft, push cam, or return torsion spring, and allows for easy adjustment of the direction of the ball swing rod, further improving the convenience of use and maintenance.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the dustproof and easily detachable limit switch: 1. When the limit switch malfunctions or is damaged, you can press the elastic insert by hand to disengage it from the slot, which will allow the plug socket to detach from the switch housing. This will allow the switch housing to be quickly separated from the fixed base, and the metal post recessed contact to be separated from the elastic energized contact. This will allow the switch housing to be quickly and easily removed from the machine without requiring too much space, and will save you the inconvenience of wiring and screwing, greatly improving the convenience of maintenance. 2. When the plug is inserted into the switch housing during use, the gap between the plug and the switch housing will be sealed by the dustproof ring, preventing external dust, impurities, and oil from entering the switch housing and causing poor contact between the metal post recessed contact and the elastic contact. After the switch housing and the plug are inserted into each other, the elastic strip will be inserted into the slot for fixation, ensuring that the switch housing and the plug are firmly connected and fixed together. This ensures that the metal post recessed contact and the elastic contact will not become loose due to machine movement or contact during use, thus greatly improving the stability of the limit switch during use. 3. When connecting the fixed base to the switch housing, the limiting insertion soft film needs to be inserted into the insertion slot first. This will fix the insertion slot to the outer surface of the positioning base plate. After the switch housing and the plug socket are inserted, the positioning base plate can be fully inserted into the fixed base. With the insertion of the elastic strip and the slot, the connection strength between the switch housing and the fixed base can be further improved, reducing the probability of damage or breakage of the switch housing, plug socket, elastic strip, and slot when the lower switch is used. 4. When the components inside the switch housing are damaged, simply remove the connecting wire lugs and take out the built-in micro switch to replace it. You can also remove the cover plate and loosen the set screw to remove the plunger, shaft, push cam, and reset torsion spring, so as to replace or maintain the failed or worn parts, greatly improving the convenience of limit switch maintenance. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the fixed base and switch housing of this utility model; Figure 2 This is a cross-sectional perspective view of the elastic insert and slot structure of this utility model; Figure 3 This is a three-dimensional cross-sectional view of the fixed base and plug male socket of this utility model; Figure 4 This is a three-dimensional cross-sectional view of the dustproof ring and rotating shaft of this utility model; Figure 5 This is an exploded three-dimensional structural diagram of the built-in micro switch and positioning base plate of this utility model; Figure 6 This is a three-dimensional exploded view of the plunger and rotating shaft of this utility model.

[0019] In the diagram: 1. Fixed base; 2. Inspection top cover; 3. Switch housing; 4. Plug socket; 5. Metal post recessed contact; 6. Adjustment top cover; 7. Limiting block; 8. Dust ring; 9. Flexible energized contact; 10. Built-in micro switch; 11. Connecting wire lug; 12. Flexible insert; 13. Slot; 14. Positioning base plate; 15. Insert slot; 16. Limiting insertion soft film; 17. Plunger; 18. Rotating shaft; 19. Push cam; 20. Return torsion spring; 21. Ball swing rod. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-6 This utility model provides a technical solution: a dustproof and easily detachable limit switch, including a fixed base 1. A wire is provided through the side surface of the fixed base 1, and the fixed base 1 is fixed to the outer surface of a machine. A plug socket 4 is fixedly provided at the end of the fixed base 1 away from the wire, and the plug socket 4 is inserted into the switch housing 3. A built-in micro switch 10 is fitted inside the switch housing 3. A metal post recessed contact 5 is fixedly provided inside the plug socket 4, and one end of the metal post recessed contact 5 does not extend beyond the side surface of the plug socket 4. The inner... A flexible energized contact 9 is fixedly installed in the switch housing 3, with one end of the flexible energized contact 9 located on the outside of the switch housing 3. A limit anti-fooling block 7 is fixedly installed inside the switch housing 3, and the limit anti-fooling block 7 is inserted into the plug socket 4, and the plug socket 4 is engaged with the limit anti-fooling block 7. A dustproof ring 8 is inlaid on the inner surface of the switch housing 3, and the outer surface of the dustproof ring 8 is tightly fitted with the outer surface of the plug socket 4. The flexible energized contact 9 and the metal post recessed contact 5 are concentrically designed, and the outer surface of the metal post recessed contact 5 is fitted with the outer surface of one end of the flexible energized contact 9.

[0022] Firstly, when the limit switch malfunctions and needs to be disassembled, simply press the elastic insert 12 and pull the switch housing 3 to disengage the elastic insert 12 from the slot 13, allowing the switch housing 3 to disengage from the plug socket 4. This also allows the dust seal 8 to disengage from the plug socket 4, enabling the fixed base 1 and the switch housing 3 to be quickly removed. Furthermore, the recessed metal post contact 5 and the elastic energized contact 9 can be separated and disconnected, allowing the switch housing 3 and the plug socket 4 to be quickly separated and disassembled. Simultaneously, the presence of the limit anti-misalignment block 7 prevents the switch housing 3 from being misaligned when plugged into the plug socket 4, thus avoiding contact signal malfunction. Moreover, disassembly and installation do not require a large space and eliminate the need to disassemble wiring and screws, greatly improving the convenience of disassembling and installing the limit switch.

[0023] A circuit board is fixedly installed inside the fixed base 1, and the circuit board inside the fixed base 1 connects the circuit to the recessed contact 5 of the metal column. A maintenance top cover 2 is snapped onto the outer surface of the fixed base 1, and a sealing gasket is provided between the maintenance top cover 2 and the fixed base 1. A connecting wire lug 11 is fixedly pressed onto the outer surface of the built-in micro switch 10, and the connecting wire lug 11 is connected to the elastic energized contact 9. An adjustment top cover 6 is fixedly installed at one end of the switch housing 3 near the built-in micro switch 10, and a sealing gasket is provided between the adjustment top cover 6 and the switch housing 3.

[0024] Secondly, when the electrical components inside the limit switch are damaged, simply remove the adjustment cover 6 to remove the built-in micro switch 10 and the connecting wire lug 11. Then, a new built-in micro switch 10 can be installed back into the switch housing 3, and the connecting wire lug 11 can be reset. This allows for the repair and replacement of the built-in micro switch 10. Furthermore, if the wiring of the fixed base 1 is damaged, the fixed base 1 can be removed from the machine and the inspection cover 2 can be removed. Then, the wiring can be pulled out, separated from the circuit board, and the soldered wiring can be replaced. This completes the maintenance of the limit switch circuit without the need for complete replacement, greatly improving the convenience of limit switch maintenance.

[0025] Elastic inserts 12 are fixedly installed on both sides of the fixed base 1, and the length of the elastic inserts 12 is aligned with one side of the plug socket 4. Slots 13 are fixedly installed on both sides of the switch housing 3, and the slots 13 and the elastic inserts 12 are concentrically designed and engage with each other. An auxiliary fixing device is provided between the fixed base 1 and the switch housing 3. The auxiliary fixing device includes a positioning base plate 14, which is slidably inserted into the outer surface of the fixed base 1. A insertion slot 15 is fixedly provided at the end of the positioning base plate 14 away from the plug socket 4, and the insertion slot 15 is arrow-shaped. Limiting engagement films 16 are fixedly installed on both sides of the switch housing 3 near the end of the built-in micro switch 10, and the limiting engagement films 16 engage with the insertion slots 15 and engage with each other.

[0026] Furthermore, when the switch housing 3 is reconnected to the fixed base 1 after maintenance, simply insert the limit insertion flexible piece 16 into the insertion slot 15 to connect and fix the switch housing 3 to the positioning base plate 14. Then, insert the positioning base plate 14 into the fixed base 1 and push the switch housing 3 to connect the switch housing 3 to the plug socket 4. At the same time, the elastic insert 12 and the slot 13 will interlock and fix each other, so that the fixed base 1 and the switch housing 3 can be firmly connected and fixed together. This prevents poor contact caused by loosening when the metal post recessed contact 5 and the elastic energized contact 9 are connected, greatly improving the stability of the limit switch during use.

[0027] A rotating shaft 18 is rotatably mounted on the end of the switch housing 3 away from the dustproof ring 8. A push cam 19 is engaged with the outer surface of the rotating shaft 18, and a reset torsion spring 20 is inserted between the push cam 19 and the switch housing 3. The push cam 19 and the rotating shaft 18 are fixed by a set screw. A plunger 17 is slidably mounted on one side inside the switch housing 3, and the outer surface of the plunger 17 is in contact with the outer surface of the push cam 19. A sealing ring is provided between the switch housing 3 and the rotating shaft 18. A spline is provided on the end of the rotating shaft 18 located outside the switch housing 3. The rotating shaft 18 is engaged with a ball swing rod 21, and the ball swing rod 21 is fixed to the rotating shaft 18 by screws. An inspection port and a cover plate are provided on the side of the switch housing 3 near the ball swing rod 21.

[0028] Furthermore, when a mechanical failure occurs in the limit switch, simply remove the cover plate of the switch housing 3 and remove the set screw on the push cam 19 to loosen the push cam 19. Then, hold the ball swing rod 21 and pull out the rotating shaft 18. After that, remove the plunger 17, the push cam 19 and the reset torsion spring 20 one by one for inspection, maintenance or replacement. Then, reinstall the plunger 17, the rotating shaft 18, the push cam 19 and the reset torsion spring 20 one by one to return them to their original positions. This completes the maintenance of the mechanical part of the limit switch without replacing the entire switch, greatly improving the practicality of the limit switch.

[0029] Working principle: When removing the limit switch, simply press the elastic insert 12 to disengage it from the slot 13. Then, grasp the switch housing 3 and pull it upwards to separate it from the plug socket 4, allowing the switch housing 3 to be removed from the fixed base 1. This also separates the elastic energized contact 9 from the recessed metal post contact 5. Afterwards, the electrical components and mechanical parts inside the switch housing 3 can be inspected and maintained to troubleshoot the limit switch. During maintenance, a replacement switch housing 3 of the corresponding model can be used, and the insert slot 1... 5. The switch housing 3 is fixed to the positioning base plate 14 by engaging with the limiting engagement film 16. Then, the positioning base plate 14 is inserted into the fixing base 1, and the switch housing 3 can be inserted back into the plug male socket 4, so that the limiting anti-fooling block 7 can engage with the plug male socket 4, and the dust ring 8 can seal the gap between the switch housing 3 and the plug male socket 4. At the same time, the elastic insert 12 engages with the slot 13, so that the fixing base 1 and the switch housing 3 do not require a large space when installing and disassembling, and the steps of removing and installing screws and wires can be eliminated, improving the convenience and efficiency of maintenance.

[0030] 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 dustproof and easily detachable limit switch, comprising a fixed base (1), wherein a circuit is provided through the side surface of the fixed base (1), and the fixed base (1) is fixed to the outer surface of a machine, wherein a plug socket (4) is fixedly provided at the end of the fixed base (1) away from the circuit, and the plug socket (4) is inserted into the switch housing (3), and a built-in micro switch (10) is engaged inside the switch housing (3), characterized in that: The plug socket (4) is fixedly provided with a metal post recessed contact (5), and one end of the metal post recessed contact (5) does not exceed the side surface of the plug socket (4). The switch housing (3) is fixedly installed with a flexible energized contact (9), and one end of the flexible energized contact (9) is located on the outside of the switch housing (3). The flexible energized contact (9) and the metal post recessed contact (5) are concentrically designed, and the outer surface of the metal post recessed contact (5) is in contact with the outer surface of one end of the flexible energized contact (9).

2. The dustproof and easily detachable limit switch according to claim 1, characterized in that: The switch housing (3) is fixedly installed with a limit block (7), and the limit block (7) is inserted into the plug socket (4), and the plug socket (4) is engaged with the limit block (7). The inner surface of the switch housing (3) is inlaid with a dustproof ring (8), and the outer surface of the dustproof ring (8) is tightly fitted with the outer surface of the plug socket (4).

3. The dustproof and easily detachable limit switch according to claim 1, characterized in that: The fixed base (1) has a circuit board fixedly installed inside, and the circuit board inside the fixed base (1) connects the circuit to the recessed contact (5) of the metal column. The outer surface of the fixed base (1) is fitted with a maintenance top cover (2), and a sealing gasket is provided between the maintenance top cover (2) and the fixed base (1).

4. The dustproof and easily detachable limit switch according to claim 1, characterized in that: The outer surface of the built-in micro switch (10) is fixedly pressed with a connecting wire nose (11), and the connecting wire nose (11) is connected to the elastic energized contact (9). An adjustment top cover (6) is fixedly installed on one end of the switch housing (3) near the built-in micro switch (10), and a sealing gasket is provided between the adjustment top cover (6) and the switch housing (3).

5. A dustproof and easily detachable limit switch according to claim 1, characterized in that: The fixed base (1) is fixedly installed with elastic inserts (12) on both sides, and the length of the elastic inserts (12) is aligned with one side of the plug socket (4). The switch housing (3) is fixedly installed with slots (13) on both sides, and the slots (13) and the elastic inserts (12) are concentrically designed, and the elastic inserts (12) and the slots (13) engage. An auxiliary fixing device is provided between the fixed base (1) and the switch housing (3).

6. A dustproof and easily detachable limit switch according to claim 5, characterized in that: The auxiliary fixing device includes: a positioning base plate (14), which is slidably inserted into the outer surface of the fixing base (1). The positioning base plate (14) is fixedly provided with a pin slot (15) at one end away from the plug socket (4), and the pin slot (15) is arrow-shaped. Limiting insertion soft films (16) are fixedly installed on both sides of the switch housing (3) near the end of the built-in micro switch (10), and the limiting insertion soft film (16) is inserted into the pin slot (15), and the pin slot (15) is engaged with the limiting insertion soft film (16).

7. A dustproof and easily detachable limit switch according to claim 1, characterized in that: A rotating shaft (18) is rotatably mounted on the end of the switch housing (3) away from the dustproof ring (8), and a push cam (19) is inserted into the outer surface of the rotating shaft (18). A reset torsion spring (20) is inserted between the push cam (19) and the switch housing (3). The push cam (19) and the rotating shaft (18) are fixed by a set screw. A plunger (17) is slidably mounted on one side inside the switch housing (3), and the outer surface of the plunger (17) is in contact with the outer surface of the push cam (19). A sealing ring is provided between the switch housing (3) and the rotating shaft (18). A spline is provided at one end of the rotating shaft (18) outside the switch housing (3). The rotating shaft (18) is inserted into the ball swing rod (21), and the ball swing rod (21) is fixed to the rotating shaft (18) by a screw. An inspection port and a cover plate are provided on the side of the switch housing (3) near the ball swing rod (21).

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