Plastic housing circuit breaker

Abstract

The utility model discloses a plastic shell formula circuit breaker relates to circuit breaker technical field, specifically for plastic shell formula circuit breaker, including lower base, upper base, circuit breaker main part, and lower base is connected with upper base through bolt, the front of lower base is provided with rectangular groove, the front of lower base is provided with sliding slot, the front both sides of lower base all are provided with through -going groove, this plastic shell formula circuit breaker, through increasing the protective cover on circuit breaker main part, can overturn protective cover, makes the protective cover cover on circuit breaker main part, and the protection of wiring slot can not only play certain spacing effect to electric wire, and guarantee the condition under the line outside, forms effective protection to the wiring slot on circuit breaker main part, avoids the dust to fall into the inner chamber of wiring slot, improves product use stability and prolongs the service life.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to plastic-cased circuit breakers. Background Technology

[0002] Molded case circuit breakers are generally used for power distribution. They are made of plastic materials such as epoxy resin and unsaturated polyester resin, and have excellent insulation and fire resistance properties. They protect internal components and prevent electric shock accidents. They are a type of switching device that can close, carry and interrupt current under normal circuit conditions, and carry a specified overcurrent for a specified time.

[0003] Currently available molded case circuit breakers require the metal end of the external wire to be wrapped around a bolt, and then the bolt is tightened to press against the metal connecting plate on the circuit breaker to complete the connection. However, the wiring slots at the ends, the bolts used for wiring, and the inner core of the cable are all exposed to the outside. After long-term use, dust and impurities will accumulate on their surfaces, causing pollution and corrosion. In addition, current molded case circuit breakers are basically installed using bolts, which requires repeatedly removing multiple screws for installation and disassembly, which is inconvenient and can easily cause stripping of the screw threads. Therefore, we have proposed a molded case circuit breaker. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a plastic-cased circuit breaker, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a plastic-cased circuit breaker, comprising a lower base, an upper base, and a circuit breaker body. The lower base and the upper base are connected by bolts. A rectangular groove and a sliding groove are formed on the front side of the lower base. Through grooves are formed on both sides of the front side of the lower base. A connecting rod is slidably installed within the sliding groove. A fixing rod is fixedly connected to the inner side of the connecting rod, extending into the rectangular groove. An elastic plate is fixedly connected to the outer side of the connecting rod. A triangular protrusion is provided on the elastic plate, and a rectangular protrusion is connected to the end of the elastic plate. The elastic plate is located within the through groove. The upper base has an avoidance groove and a locking groove located in front of the through groove. The triangular protrusion engages with the locking groove. The rectangular protrusion penetrates the avoidance groove and extends to the outside of the upper base.

[0006] A rectangular protrusion is connected to the back of the circuit breaker body, and a fixing hole is connected to the center of the rectangular protrusion. Protective covers are installed on the top and bottom of the circuit breaker body by hinge rotation. Three wire avoidance openings are provided on the protective covers. Elastic rubber plates are connected to both sides of the inner cavity of the wire avoidance openings, and the corresponding two elastic rubber plates are in contact.

[0007] Preferably, the through groove is connected to the card slot and the clearance groove.

[0008] Preferably, the circuit breaker body is movably sleeved into the inner cavity of the upper base and in contact with the front of the lower base, the rectangular protrusion is sleeved into the inner cavity of the rectangular groove, and the fixing rod is sleeved into the inner cavity of the fixing hole.

[0009] Preferably, a reinforcing strip is installed on the front of the circuit breaker body, and a limiting groove is provided on the upper surface of the reinforcing strip.

[0010] Preferably, a compression spring is fixedly connected inside the protective cover, one end of the compression spring is connected to a limiting post, and one end of the limiting post is sleeved into the inner cavity of the limiting groove.

[0011] Preferably, a switch is installed on the front of the circuit breaker body, and wiring grooves are provided on the top and bottom of the circuit breaker body. Wiring screws are provided inside the wiring grooves, and the wiring grooves correspond to the positions of the wire avoidance openings.

[0012] This utility model provides a plastic-cased circuit breaker, which has the following advantages:

[0013] 1. This plastic-cased circuit breaker features a protective cover added to the main body. This cover can be flipped over to cover the main body, protecting the wiring slot. During the flipping process, the wire can be placed between two elastic rubber plates inside the wire clearance cavity. The two elastic rubber plates are then spread apart, allowing the wire to move between them. This not only limits the movement of the wire but also effectively protects the wiring slot on the main body while ensuring the safety of the wiring from external factors. This prevents dust from falling into the wiring slot cavity, improving product stability and extending service life.

[0014] 2. This plastic-cased circuit breaker facilitates the installation and disassembly of the circuit breaker body through the coordinated use of connecting rods, elastic plates, fixing rods, triangular protrusions, and rectangular protrusions. At the same time, by splitting the base part for mounting the circuit breaker body into a lower base and an upper base, it is easy to replace the connecting rods, elastic plates, fixing rods, triangular protrusions, and rectangular protrusions after long-term use due to fatigue and damage, thereby reducing the cost of use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the main body of the circuit breaker of this utility model;

[0017] Figure 3 This is a side view of the structure of this utility model;

[0018] Figure 4 This is a structural schematic diagram of the front of the lower base of this utility model;

[0019] Figure 5 This is a structural diagram of the front of the upper base of this utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the protective cover of this utility model;

[0021] Figure 7 This is a schematic diagram of the structure of the limiting post of this utility model;

[0022] Figure 8 This is a schematic diagram of the connecting rod of this utility model.

[0023] In the diagram: 1. Lower base; 101. Connecting rod; 102. Sliding groove; 103. Rectangular protrusion; 104. Triangular protrusion; 105. Elastic plate; 106. Fixing rod; 107. Rectangular groove; 108. Through groove;

[0024] 2. Upper base; 201. Slot; 202. Clearance slot;

[0025] 3. Circuit breaker body; 301. Switch; 302. Protective cover; 303. Wire clearance opening; 304. Elastic rubber plate; 305. Compression spring; 306. Limiting post; 307. Limiting groove; 308. Rectangular protrusion; 309. Fixing hole; 310. Reinforcing strip. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Example 1: Refer to Figures 1-5This utility model provides a plastic-cased circuit breaker, including a lower base 1, an upper base 2, and a circuit breaker body 3. The lower base 1 and the upper base 2 are connected by bolts. A rectangular groove 107 is formed on the front of the lower base 1, and sliding grooves 102 are formed on both sides of the rectangular groove 107 on the front of the lower base 1. Through grooves 108 are formed on both sides of the front of the lower base 1. A connecting rod 101 is slidably installed in the inner cavity of the sliding groove 102, and a fixing rod 106 is fixedly connected to the inner side of the connecting rod 101. Extending into the inner cavity of the rectangular groove 107, an elastic plate 105 is fixedly connected to the outer side of the connecting rod 101. The elastic plate 105 is provided with a triangular protrusion 104, and a rectangular protrusion 103 is connected to the end of the elastic plate 105. The elastic plate 105 is located in the inner cavity of the through groove 108. The upper base 2 is provided with a clearance groove 202 and a locking groove 201 located in front of the through groove 108. The triangular protrusion 104 is locked into the inner cavity of the locking groove 201, and the rectangular protrusion 103 passes through the clearance groove 202 and extends to the outside of the upper base 2.

[0028] The base portion of the circuit breaker body 3 is split into a lower base 1 and an upper base 2, which facilitates replacement of the connecting rod 101, elastic plate 105, fixing rod 106, triangular protrusion 104, and rectangular protrusion 103 after long-term use due to fatigue and damage, thereby reducing the cost of use.

[0029] The circuit breaker body 3 is made of epoxy resin, unsaturated polyester resin, and other plastic materials, which have excellent insulation and fire resistance properties, protecting internal components and preventing electric shock accidents. This is existing technology.

[0030] A rectangular protrusion 308 is connected to the back of the circuit breaker body 3, and a fixing hole 309 is connected to the center of the rectangular protrusion 308.

[0031] The circuit breaker body 3 has a protective cover 302 mounted on its top and bottom via hinges. The protective cover 302 has three wire clearance openings 303. Both sides of the inner cavity of the wire clearance opening 303 are connected to elastic rubber plates 304, and the corresponding two elastic rubber plates 304 are in contact.

[0032] The through slot 108 is connected to the slot 201 and the clearance slot 202.

[0033] The circuit breaker body 3 is movably sleeved into the inner cavity of the upper base 2 and in contact with the front of the lower base 1. The rectangular protrusion 308 is sleeved into the inner cavity of the rectangular groove 107, and the fixing rod 106 is sleeved into the inner cavity of the fixing hole 309.

[0034] A reinforcing strip 310 is installed on the front of the circuit breaker body 3, and a limiting groove 307 is provided on the upper surface of the reinforcing strip 310.

[0035] A compression spring 305 is fixedly connected inside the protective cover 302. One end of the compression spring 305 is connected to a limit post 306, and one end of the limit post 306 is sleeved into the inner cavity of the limit groove 307.

[0036] A switch 301 is mounted on the front of the circuit breaker body 3. Wiring grooves are provided on the top and bottom of the circuit breaker body 3, with wiring screws inside. The wiring grooves correspond to the positions of the wire avoidance openings 303. By adding a protective cover 302 to the circuit breaker body 3, wiring is performed after the circuit breaker body 3 is installed, using screws to connect the wires to the circuit breaker body 3. At this time, the protective cover 302 can be flipped over to cover the circuit breaker body 3, protecting the wiring grooves. During the flipping process, the wire can be placed between the two elastic rubber plates 304 inside the wire avoidance opening 303, thereby spreading the two elastic rubber plates 304 apart and moving between them. Due to the elastic rubber... Plate 304 has elasticity and deformation capability, which can limit the wire and prevent dust from entering the inner cavity of the wiring groove, thus preventing the wiring bolts from being corroded. During the flipping of the protective cover 302, the limiting post 306 moves along the upper surface of the reinforcing strip 310 until it is engaged in the inner cavity of the limiting groove 307, thereby limiting the protective cover 302. When opening, pushing the limiting post 306 to move it out of the inner cavity of the limiting groove 307 can release the limitation. The operation is convenient. It not only plays a certain role in limiting the wire, but also effectively protects the wiring groove on the circuit breaker body 3 under the condition of the line outside, preventing dust from falling into the inner cavity of the wiring groove, improving the stability of product use and extending service life.

[0037] Working principle: During assembly, the connecting rod 101, elastic plate 105, fixing rod 106, triangular protrusion 104, and rectangular protrusion 103 are first integrally molded structures, which can be made of elastic metal or elastic plastic. This is placed directly inside the lower base 1. Then, the upper base 2 is placed on top of the lower base 1 and connected with screws for assembly. Finally, the lower base 1 is installed in the designated position, either using screws or direct adhesive bonding.

[0038] After installation, place the circuit breaker body 3 into the inner cavity of the upper base 2, ensuring it contacts the front of the lower base 1. The rectangular protrusion 308 is fitted into the inner cavity of the rectangular groove 107. Then, push the rectangular protrusion 103 inward, thereby moving the elastic plate 105, connecting rod 101, and fixing rod 106. This allows the fixing rod 106 to engage with the inner cavity of the fixing hole 309, causing the triangular protrusion 104 to move along the through groove 108 to below the slot 201. The elastic plate 105 then resets, allowing the triangular protrusion 104 to engage with the inner cavity of the slot 201, thus securing the circuit breaker body 3. For disassembly, simply press the elastic plate 105 and push it outward, causing the triangular protrusion 104 to disengage from the slot 201 and move, thereby disengaging the fixing rod 106 from the inner cavity of the fixing hole 309. The circuit breaker body 3 can then be removed.

[0039] After installing the circuit breaker body 3, wires are connected using screws. The protective cover 302 can then be flipped over to cover the circuit breaker body 3 and protect the wiring slot. During the flipping process, the wire can be placed between the two elastic rubber plates 304 inside the wire clearance opening 303, which will then spread the two elastic rubber plates 304 apart and move between them. Simultaneously, during the flipping of the protective cover 302, the limiting post 306 moves along the upper surface of the reinforcing strip 310 until it is engaged in the inner cavity of the limiting groove 307, thereby limiting the protective cover 302. To release the limit, push the limiting post 306 to move it away from the inner cavity of the limiting groove 307.

[0040] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0041] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0042] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A molded case circuit breaker comprising a lower base (1), an upper base (2), a circuit breaker body (3), characterized in that: The lower base (1) is connected with the upper base (2) through bolts, the front surface of the lower base (1) is provided with a rectangular groove (107), the front surface of the lower base (1) is provided with a sliding groove (102), both sides of the front surface of the lower base (1) are provided with through grooves (108), the connecting rod (101) is slidably arranged in the sliding groove (102), the inner side of the connecting rod (101) is fixedly connected with the fixed rod (106), the fixed rod (106) extends into the inner cavity of the rectangular groove (107), the outer side of the connecting rod (101) is fixedly connected with the elastic plate (105), the elastic plate (105) is provided with a triangular protrusion (104), the end of the elastic plate (105) is connected with a rectangular protrusion (103), and the elastic plate (105) is located in the inner cavity of the through groove (108), the upper base (2) is provided with an avoiding groove (202) located in front of the through groove (108) and a clamping groove (201), and the triangular protrusion (104) is clamped into the inner cavity of the clamping groove (201), the rectangular protrusion (103) penetrates through the avoiding groove (202) and extends to the outside of the upper base (2), The circuit breaker body (3) is connected with a rectangular protrusion (308) in the back, the middle of the rectangular protrusion (308) is connected with a fixed hole (309), the top and bottom of the circuit breaker body (3) are rotatably installed with a protective cover (302) through a hinge, three wire avoiding openings (303) are formed in the protective cover (302), and the two sides of the inner cavity of the wire avoiding opening (303) are connected with elastic rubber plates (304).

2. The plastic housed circuit breaker of claim 1, wherein: The through groove (108) is in communication with the clamping groove (201) and the avoiding groove (202).

3. The plastic housed circuit breaker of claim 1, wherein: The circuit breaker body (3) is movably sleeved into the inner cavity of the upper base (2) and in contact with the front surface of the lower base (1), the rectangular protrusion (308) is sleeved into the inner cavity of the rectangular groove (107), and the fixed rod (106) is sleeved into the inner cavity of the fixed hole (309).

4. The plastic housed circuit breaker of claim 1, wherein: The front surface of the circuit breaker body (3) is provided with a reinforcing strip (310), and the upper surface of the reinforcing strip (310) is provided with a limiting groove (307).

5. The plastic housed circuit breaker of claim 1, wherein: The protective cover (302) is fixedly connected with a compression spring (305) inside, one end of the compression spring (305) is connected with a limiting column (306), and one end of the limiting column (306) is sleeved into the inner cavity of the limiting groove (307).

6. The plastic housed circuit breaker of claim 1, wherein: The front surface of the circuit breaker body (3) is provided with a switch (301), the top and bottom of the circuit breaker body (3) are provided with wire grooves, the wire grooves are provided with wire screws inside, and the wire grooves correspond to the positions of the wire avoiding openings (303).

7. The plastic housed circuit breaker of claim 1, wherein: The corresponding two elastic rubber plates (304) are in contact.

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