A miniature circuit breaker

Abstract

The present invention discloses a miniature circuit breaker. The technical solution comprises a first housing, a leakage self-test module for simulating circuit leakage, and a fixing assembly for fixing the leakage self-test module. The fixing assembly comprises a second housing, the leakage self-test module being disposed within the second housing, the second housing being provided with a plug, a clamping rod, and a reset hole, and the first housing being provided with an electrical connection hole. The plug is electrically connected to the leakage self-test module, and the plug is inserted into the electrical connection hole and electrically connected. The present invention has the following beneficial effects: when the leakage self-test module is damaged and needs to be disassembled, a button is pressed, and one end of the button presses the clamping rod, disengaging the clamping connector from the slot, thereby enabling the second housing to be removed from the first housing, facilitating disassembly and replacement. Repairs can be completed without replacing the circuit breaker, thus avoiding waste.

Description

Technical Field

[0001] The present invention relates to a circuit breaker, and more particularly, to a miniature circuit breaker. Background Art

[0002] Miniature circuit breakers are the most widely used terminal protection devices in building electrical terminal distribution systems. They are primarily used to protect circuits and electrical equipment against overload, short circuit, and leakage. One of the functions of a circuit breaker is to disconnect in the event of a leakage. To verify compliance, circuit breakers are equipped with leakage self-test devices. However, these devices are simple and easily damaged. Damage to the leakage self-test device is difficult to repair, requiring the circuit breaker to be replaced, resulting in wasteful repairs. Summary of the Invention

[0003] In view of the shortcomings of the prior art, an object of the present invention is to provide a miniature circuit breaker capable of replacing a leakage self-detection device.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a miniature circuit breaker, comprising a first shell, a leakage self-test module for simulating circuit leakage, and a fixing assembly for fixing the leakage self-test module, the fixing assembly comprising a second shell, the leakage self-test module being arranged in the second shell, the second shell being provided with a plug, a clamping rod, and a reset hole, an electrical connection hole being provided on the first shell, the plug being electrically connected to the leakage self-test module, the plug being inserted into the electrical connection hole and electrically connected, the first shell also being provided with a clamping hole, the clamping rod being inserted into the clamping hole, a clamping slot being provided in the clamping hole, the clamping rod being provided with a clamping joint, the clamping joint being clamped into the clamping slot to fix the second shell on the first shell, the reset hole being slidably connected to a button, when disassembling, pressing the button, one end of the button pressing the clamping rod, driving the clamping joint to disengage from the clamping slot.

[0005] The present invention is further configured as follows: the leakage self-detection module includes a first metal plate, a second metal plate and a leakage switch for controlling the opening and closing of the leakage self-detection module; the first metal plate and the second metal plate are both fixedly connected to the inner wall of the second shell; one end of the first metal plate is arranged above one end of the second metal plate; one end of the leakage switch abuts against the top surface of the first metal plate; when in use, one end of the leakage switch presses the first metal plate, causing the first metal plate to bend so as to connect with the second metal plate.

[0006] The present invention is further configured as follows: the leakage self-detection module also includes a fuse for preventing excessive current; the first metal plate or the second metal plate is configured as a metal plate group consisting of two adjacent metal plates; the fuse is configured between the two metal plates to connect the two metal plates; and the adjacent ends of the two metal plates are fixed on the inner wall of the second shell.

[0007] The present invention is further configured as follows: a first electrode for connecting to the live wire and a second electrode for connecting to the ground wire are provided in the electrical connection hole, the plug is provided with a socket and a return hole, a connection head is provided in the socket, a return head is provided in the return hole, the return head is connected to the other end of the first metal plate, and the connection head is connected to the other end of the second metal plate. When the plug is inserted into the electrical connection hole, the first electrode is inserted into the socket to connect with the connection head, and the second electrode is inserted into the return hole to connect with the return head.

[0008] The present invention is further configured as follows: a switch hole is further provided on the second housing, and the leakage switch is rotationally connected to the switch hole or slidingly connected to the switch hole.

[0009] The present invention is further configured as follows: a first elastic member is provided in the reset hole, and one end of the first elastic member is connected to the button to drive the button to move out of the reset hole.

[0010] The present invention is further configured as follows: a second elastic member is provided in the switch hole, and one end of the second elastic member is connected to the leakage switch to reset the leakage switch.

[0011] The present invention is further configured as follows: the first shell is further provided with a limiting hole, the second shell is further provided with a limiting head, and the limiting head is inserted into the limiting hole.

[0012] The present invention is further configured such that the clamping rod is arranged obliquely and is a plastic plate with elasticity.

[0013] The present invention is further configured as follows: the clamping hole is arranged above the electrical connection hole, and the limiting hole is arranged below the electrical connection hole, and they are asymmetrically arranged. The structures of the clamping joint and the limiting head are asymmetrically consistent with the plug as the center.

[0014] In summary, the present invention has the following beneficial effects: When in use, the user aligns the plug with the electrical connection hole and inserts it into the electrical connection hole, electrically connecting the two leakage self-test modules to the circuit breaker. The clamping rod is inserted into the clamping hole, and the clamping connector is snapped into the clamping slot, fixing the second housing to the first housing. The connection is firm and not easy to loosen, and it is easy to use. If the leakage self-test module is damaged and needs to be disassembled, the button is pressed. One end of the button presses the clamping rod, disengaging the clamping connector from the clamping slot, thereby removing the second housing from the first housing. This facilitates disassembly and replacement, and repairs can be completed without replacing the circuit breaker, avoiding waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of a miniature circuit breaker;

[0016] Figure 2 This is a schematic diagram of the metal sheet group structure of a miniature circuit breaker;

[0017] Figure 3 This is a schematic diagram of the connection structure of the leakage switch of the miniature circuit breaker;

[0018] Figure 4 This is a schematic diagram of the button connection structure of the miniature circuit breaker. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0020] Reference Figure 1-4 As shown, a miniature circuit breaker includes a first shell 1, a leakage self-test module 4 for simulating circuit leakage, and a fixing assembly for fixing the leakage self-test module 4, the fixing assembly includes a second shell 2, the leakage self-test module 4 is arranged in the second shell 2, the second shell 2 is provided with a plug 24, a clamping rod 21 and a reset hole 23, the first shell 1 is provided with an electrical connection hole 13, the plug 24 is electrically connected to the leakage self-test module 4, the plug 24 is inserted into the electrical connection hole 13 and electrically connected, the first shell 1 is further provided with a clamping hole 11, the clamping rod 21 is inserted into the clamping hole 11, a clamping slot 111 is provided in the clamping hole 11, the clamping rod 21 is provided with a clamping joint 211, the clamping joint 211 is clamped into the clamping slot 111 to fix the second shell 2 on the first shell 1, and the reset hole 23 is slidably connected to a button 231. When disassembling, the button 231 is pressed, and one end of the button 231 presses the clamping rod 21, driving the clamping joint 211 to disengage from the clamping slot 111.

[0021] With the above solution, when in use, the user aligns the plug 24 with the electrical connection hole 13 and inserts it into the electrical connection hole 13, electrically connecting the two leakage self-test modules to the circuit breaker. The clamping rod 21 is inserted into the clamping hole 11, and the clamping connector 211 is engaged with the clamping slot 111, thereby fixing the second housing 2 to the first housing 1. The connection is firm and not easy to loosen, making it easy to use. If the leakage self-test module is damaged and needs to be removed, the button 231 is pressed. One end of the button 231 presses the clamping rod 21, disengaging the clamping connector 211 from the clamping slot 111, thereby removing the second housing 2 from the first housing 1. This facilitates disassembly and replacement, and repairs can be completed without replacing the circuit breaker, avoiding waste.

[0022] As a specific embodiment of the improvement, the leakage self-test module 4 includes a first metal plate 41, a second metal plate 42 and a leakage switch 3 for controlling the opening and closing of the leakage self-test module 4. The first metal plate 41 and the second metal plate 42 are both fixedly connected to the inner wall of the second shell 2. One end of the first metal plate 41 is arranged above one end of the second metal plate 42. One end of the leakage switch 3 abuts against the top surface of the first metal plate 41. When in use, one end of the leakage switch 3 presses the first metal plate 41, causing the first metal plate 41 to bend to connect with the second metal plate 42.

[0023] With this solution, when a leakage current test is needed, the user turns on switch 3. One end of the leakage circuit breaker 3 presses against first metal plate 41, bending it and connecting it to second metal plate 42, thus simulating leakage current. After the simulation is complete, the user resets switch 3, returning first metal plate 41 to its original shape and disconnecting the first and second metal plates 41, 42, to facilitate the next simulation.

[0024] As a specific embodiment of the improvement, the leakage self-test module 4 also includes a fuse 43 for preventing the current from being too high. The first metal plate 41 or the second metal plate 42 is set as a metal plate group consisting of two adjacent metal plates. The fuse 43 is set between the two metal plates to connect the two metal plates. The adjacent ends of the two metal plates are fixed on the inner wall of the second shell 2.

[0025] Through the above solution, when the current is too high, the fuse 43 melts, thereby preventing other electrical appliances on the circuit from being burned out, thus playing a protective role.

[0026] As an improved specific embodiment, a first electrode 131 for connecting to the live wire and a second electrode 132 for connecting to the ground wire are provided in the electrical connection hole 13, and the plug 24 is provided with a socket hole 241 and a return hole 242. A power connection head 243 is provided in the socket hole 241, and a return head 244 is provided in the return hole 242. The return head 244 is connected to the other end of the first metal plate 41, and the power connection head 243 is connected to the other end of the second metal plate 42. When the plug 24 is inserted into the electrical connection hole 13, the first electrode 131 is inserted into the socket hole 241 to connect with the power connection head 243, and the second electrode 132 is inserted into the return hole 242 to connect with the return head 244.

[0027] Through the above solution, the first electrode 131 is pressed against the receiving head 243, and the second metal plate 42 is bent, so that the two are tightly fitted, not easily loosened, and the electrical connection is stable. The second electrode 132 is pressed against the return head 244, and the first metal plate 41 is bent, so that the two are tightly fitted, not easily loosened, and the electrical connection is stable.

[0028] As an improved specific implementation, the second housing 2 is provided with a switch hole 25 , and the leakage switch 3 is rotatably connected to the switch hole 25 or slidably connected to the switch hole 25 .

[0029] Through the above solution, the switch hole 25 guides the leakage switch 3 to press the first metal plate 41, and the first metal plate 41 abuts against the second metal plate 42, so that the circuit is connected, thereby simulating leakage, so as to perform a leakage simulation test to check whether the circuit breaker can operate normally.

[0030] As an improved specific embodiment, a first elastic member 232 is provided in the reset hole 23, one end of the first elastic member 232 is connected to the button 231 to drive the button 231 to move out of the reset hole 23, and a second elastic member 251 is provided in the switch hole 25, one end of the second elastic member 251 is connected to the leakage switch 3 to reset the leakage switch 3.

[0031] Through the above solution, the first elastic member 232 and the second elastic member 251 play a role of resetting, so as to facilitate the next test and facilitate multiple tests in a short time.

[0032] As an improved specific implementation, the first shell 1 is further provided with a limiting hole 12 , and the second shell 2 is further provided with a limiting head 22 , which is inserted into the limiting hole 12 .

[0033] Through the above solution, when in use, the limiting head 22 is inserted into the limiting hole 12 to strengthen the connection and prevent it from loosening.

[0034] As an improved specific implementation, the clamping rod 21 is tilted and is a plastic plate with elasticity.

[0035] Through the above solution, the plastic is helpful to prevent leakage, the elasticity is convenient for reset, and it is also convenient for bending and deformation, which is convenient for use. The inclined setting is convenient for providing elastic force to make the card connector 211 snap into the card slot 111.

[0036] As an improved specific embodiment, the snap-in hole 11 is arranged above the electrical connection hole 13, and the limiting hole 12 is arranged below the electrical connection hole 13, and they are asymmetrically arranged. The structures of the snap-in joint 211 and the limiting head 22 are asymmetrically consistent with the plug 24 as the center.

[0037] Through the above solution, due to the central asymmetric structure, successful installation cannot be achieved when the direction is wrong, thereby guiding the user to perform correct installation and avoid installation errors.

[0038] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A miniature circuit breaker comprising a first housing (1), a leakage self-test module (4) for simulating circuit leakage, and a fixing assembly for fixing the leakage self-test module (4), wherein: The fixing assembly comprises a second housing (2), the leakage self-test module (4) is arranged in the second housing (2), the second housing (2) is provided with a plug (24), a clamping rod (21) and a reset hole (23), the first housing (1) is provided with an electrical connection hole (13), the plug (24) is electrically connected to the leakage self-test module (4), the plug (24) is inserted into the electrical connection hole (13), and is electrically connected, the first housing (1) is also provided with a clamping hole (11), the clamping rod (21) is inserted into the clamping hole (11), the clamping hole ( 11), a card slot (111) is provided in the card connecting rod (21), a card connector (211) is provided, and the card connector (211) is inserted into the card slot (111) to fix the second shell (2) on the first shell (1), and the reset hole (23) is slidably connected to a button (231). When the leakage self-test module (4) is damaged and needs to be disassembled, the button (231) is pressed, and one end of the button (231) presses the card connecting rod (21), driving the card connector (211) to disengage from the card slot (111), and the second shell (2) is removed from the first shell (1).

2. The miniature circuit breaker according to claim 1, wherein: The leakage self-detection module (4) comprises a first metal plate (41), a second metal plate (42) and a leakage switch (3) for controlling the opening and closing of the leakage self-detection module (4); the first metal plate (41) and the second metal plate (42) are both fixedly connected to the inner wall of the second housing (2); one end of the first metal plate (41) is arranged above one end of the second metal plate (42); one end of the leakage switch (3) abuts against the top surface of the first metal plate (41); when in use, one end of the leakage switch (3) presses against the first metal plate (41), causing the first metal plate (41) to bend so as to connect with the second metal plate (42).

3. The miniature circuit breaker according to claim 2, wherein: The leakage self-detection module (4) further includes a fuse (43) for preventing excessive current; the first metal plate (41) or the second metal plate (42) is configured as a metal sheet group consisting of two adjacent metal sheets; the fuse (43) is disposed between the two metal sheets to connect the two metal sheets; and the adjacent ends of the two metal sheets are fixed to the inner wall of the second housing (2).

4. The miniature circuit breaker according to claim 3, wherein: The electrical connection hole (13) is provided with a first electrode (131) for connecting to a live wire and a second electrode (132) for connecting to a ground wire. The plug (24) is provided with a socket (241) and a return hole (242). The socket (241) is provided with a connection head (243). The return hole (242) is provided with a return head (244). The return head (244) is connected to the other end of the first metal plate (41). The connection head (243) is connected to the other end of the second metal plate (42). When the plug (24) is inserted into the electrical connection hole (13), the first electrode (131) is inserted into the socket (241) to connect to the connection head (243), and the second electrode (132) is inserted into the return hole (242) to connect to the return head (244).

5. The miniature circuit breaker according to claim 4, wherein: The second housing (2) is also provided with a switch hole (25), and the leakage switch (3) is rotatably connected to the switch hole (25) or slidably connected to the switch hole (25).

6. The miniature circuit breaker according to claim 5, wherein: A first elastic member (232) is provided in the reset hole (23), and one end of the first elastic member (232) is connected to the button (231) to drive the button (231) to move out of the reset hole (23).

7. The miniature circuit breaker according to claim 6, wherein: The switch hole (25) is provided with a second elastic member (251), and one end of the second elastic member (251) is connected to the leakage switch (3) to reset the leakage switch (3).

8. The miniature circuit breaker according to claim 7, wherein: The first housing (1) is further provided with a limiting hole (12), and the second housing (2) is further provided with a limiting head (22), wherein the limiting head (22) is inserted into the limiting hole (12).

9. The miniature circuit breaker according to claim 8, wherein: The card connector (211) is arranged obliquely and is a plastic plate with elasticity.

10. The miniature circuit breaker according to claim 9, wherein: The clamping hole (11) is arranged above the electrical connection hole (13), and the limiting hole (12) is arranged below the electrical connection hole (13), and they are asymmetrically arranged. The structures of the clamping joint (211) and the limiting head (22) are asymmetrically consistent with the plug (24) as the center.

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