Miniature metering circuit breaker

Abstract

The invention discloses a miniature metering circuit breaker, and the circuit breaker comprises a mounting seat which is provided with mounting holes at four corners; the limiting plate is arranged at the top end of the mounting seat and is positioned between the two groups of guide plates; two groups of extension parts and a group of fixing plates are arranged at the bottom end of the body, and slots are formed in the bottom ends of the fixing plates; the bottom end of each extension part is provided with a set of sliding grooves, and each extension part is provided with a set of first inserting holes. The first clamping assembly is arranged at the top end of the mounting seat and used for being clamped with the first insertion hole; the second clamping assembly is arranged between the two groups of extension parts and is used for realizing secondary clamping of the body; the third clamping assembly is mounted in the cavity in the mounting seat and is used for clamping the body for the third time; and the protective shell assembly is arranged at the top end of the mounting seat and is used for protecting the body. The miniature metering circuit breaker has remarkable beneficial effects in the aspect of improving the installation efficiency and the protection performance of the miniature metering circuit breaker.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to a miniature metering circuit breaker. Background Art

[0002] Micro Circuit Breaker (MCB) is a miniaturized switching electrical device designed to provide effective protection against fault conditions such as short circuit, overload and overvoltage. With the advancement of technology, micro metering circuit breakers have emerged. While retaining the protection function of traditional micro circuit breakers, this type of product integrates metering functions, which can monitor and report key electrical parameters such as voltage, current, power and electric energy in real time, meeting the needs of refined management in different application scenarios. According to the specific application environment and performance specifications, micro metering circuit breakers are further subdivided into single-pole 1P, two-pole 2P, three-pole 3P and four-pole 4P types to meet diverse installation and use requirements.

[0003] The prior art discloses an improved miniature circuit breaker, which is provided with a power assist member at one end of the switch. The power assist member is composed of a threaded hole opened at the end of the switch and a connecting column matched therewith. The outer wall of the connecting column has a threaded groove, which is tightened by screwing with the threaded hole. In addition, an adjustment sleeve is fixed at one end of the connecting column, and a power assist rod is movably assembled in the sleeve. This design allows the user to flexibly adjust the effective operating length of the switch, thereby reducing the force required when operating the switch and improving the convenience and comfort of use.

[0004] However, in actual application, this solution has also exposed certain limitations. In particular, it relies on screw connections in terms of installation and fixation. When the micro-metering circuit breaker needs to be replaced due to failure or maintenance, the screws must be removed first to release the fixation of the circuit breaker. This process often causes damage to the installation wall, which not only affects the aesthetics of the wall, but also brings additional difficulty and cost to the subsequent installation of new equipment, reducing the efficiency and convenience of the replacement operation. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a miniature metering circuit breaker to improve the convenience of replacement.

[0006] In order to solve the above technical problems, the present invention provides a miniature metering circuit breaker, comprising:

[0007] The mounting seat has mounting holes at its four corners;

[0008] A limit plate, arranged at the top of the mounting seat and located between the two sets of guide plates;

[0009] The body has two groups of extensions and a group of fixing plates at the bottom, and the fixing plates are provided with slots at the bottom; a group of slide grooves are provided at the bottom of each group of extensions, and a group of first jacks are provided on each group of extensions;

[0010] A first clamping assembly, disposed at the top of the mounting seat, and used for clamping with the first jack;

[0011] A second clamping assembly is disposed between the two groups of the extension parts and is used to realize secondary clamping of the body;

[0012] A third clamping assembly is installed in the chamber inside the mounting seat and is used for three-time clamping of the body;

[0013] A protective shell component is arranged on the top of the mounting seat and is used to protect the body.

[0014] Preferably, the first clamping assembly includes a shell, a first plug rod, a limiting plate, a first spring and a pull plate, the shell is arranged on the top of the mounting seat, the first plug rod passes through the shell and is slidably connected to the shell, the first plug rod is adapted to the first socket, the limiting plate is located inside the shell and is installed on the first plug rod, the first spring is installed on the end of the first plug rod away from the adjacent first socket, the first spring is located inside the shell, and a pull plate is arranged on the end of the first plug rod away from the first socket.

[0015] Preferably, the second clamping assembly includes a moving rod, a first axle pin, a connecting rod, a second axle pin, a lifting plate, a second plug rod, a first telescopic rod and a first tension spring, a group of the moving rods are slidably arranged in each group of first plug holes, a group of the first axle pins are respectively arranged at the ends close to each other of the two groups of the moving rods, one end of the two groups of the moving rods are respectively hinged to one end of the corresponding moving rods through the two groups of the first axle pins, the other ends of the two groups of the moving rods are respectively hinged to one end of the lifting plate through a group of the second axle pin, the bottom end of the lifting plate is provided with the second plug rod, the second plug rod is adapted to the second plug hole, the top end of the lifting plate is provided with the first telescopic rod and the first tension spring, the top ends of the first telescopic rod and the first tension spring are both connected to the bottom end of the body, and the fixing plate is sleeved on the outside of the sliding groove.

[0016] Preferably, the third clamping assembly includes a first hinge seat, a rocker, a second tension spring, a second telescopic rod, a groove, a third plug plate and a strip opening, the first hinge seat is provided at the bottom end of the chamber, the middle part of the rocker is hinged to the bottom end of the chamber with the cooperation of the first hinge seat, the third plug plate is slidably connected with the mounting seat, the third plug plate is provided with the strip opening, the first end of the rocker passes through the strip opening, the groove is provided at the bottom end of the third plug plate, the second tension spring and the second telescopic rod are provided in the groove, the second tension spring is sleeved on the outside of the second telescopic rod, the bottom ends of the second telescopic rod and the second tension spring are connected to the bottom end of the chamber, and the bottom end of the rocker is directly below the second plug hole.

[0017] Preferably, the protective shell assembly includes a second hinged seat, a protective shell, a notch, a clamping rod and a clamping seat. The protective shell is hinged to the top of the mounting seat through the second hinged seat. The notch is provided on the protective shell, the clamping rod is provided on the notch, the clamping seat is provided on the top of the mounting seat, the clamping rod is clamped with the clamping seat, the main body and the two groups of guide plates are all on the inner side of the protective shell, and threading holes are respectively provided on both sides of the protective shell.

[0018] Preferably, the protective shell is provided with a handle, and the handle is sleeved with a handle cover.

[0019] Preferably, the bottom end of the second insertion rod is provided with a wear-resistant coating.

[0020] Preferably, a heat dissipation port is provided at the top of the protective shell, and a protective net is installed in the heat dissipation port.

[0021] Preferably, an anti-collision pad is installed on the limiting plate.

[0022] Preferably, a group of optical bars are respectively arranged between the two groups of the extension parts, a group of limit blocks are respectively arranged at one end of each group of optical bars, a group of moving blocks are respectively arranged at the top of each group of moving rods, and each group of moving blocks is respectively slidably connected to a group of optical bars.

[0023] The implementation of the present invention has the following beneficial effects: through the innovative design of the clamping assembly and the protective shell assembly, the three-way clamping and fixing of the circuit breaker body is realized, which effectively improves the stability and convenience of the installation. The present invention avoids the damage to the wall caused by the traditional screw connection method, reduces the difficulty and cost of the replacement operation, and improves the operation efficiency. At the same time, the design of the protective shell assembly not only protects the circuit breaker body from being hit by foreign objects, but also enhances the heat dissipation performance through the design of the heat dissipation port and the protective net, thereby extending the service life of the product. In addition, the setting of the handle and the handle cover improves the comfort of operation, while the design of the light bar and the limit block enhances the stability and safety of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of a miniature metering circuit breaker according to an embodiment of the present invention.

[0026] Figure 2 It is a schematic diagram of the explosion structure of a miniature metering circuit breaker according to an embodiment of the present invention.

[0027] Figure 3 It is an enlarged structural schematic diagram of the protective shell and the second hinged seat in an embodiment of the present invention.

[0028] Figure 4 It is a first enlarged structural schematic diagram of the main body and the fixing plate in an embodiment of the present invention.

[0029] Figure 5 It is a second enlarged structural schematic diagram of the main body and the fixing plate in the embodiment of the present invention.

[0030] Figure 6 It is an enlarged structural schematic diagram of the mounting base and the third plugboard in the embodiment of the present invention.

[0031] Figure 7 It is an enlarged structural schematic diagram of the moving rod and the lifting plate in the embodiment of the present invention.

[0032] Figure 8 yes Figure 7 Schematic diagram of the partial enlarged structure of part A in the middle.

[0033] Fig. 9 It is a schematic diagram of the exploded structure of the main body and the lifting plate in the embodiment of the present invention.

[0034] Fig.10 It is a schematic diagram of the cross-sectional structure of the mounting base in the embodiment of the present invention.

[0035] Fig.11 It is an enlarged structural schematic diagram of the seesaw and the third plug board in the embodiment of the present invention.

[0036] Fig.12 It is an enlarged structural schematic diagram of the housing and the first spring in an embodiment of the present invention.

[0037] Fig.13 It is another three-dimensional structural schematic diagram of a miniature metering circuit breaker according to an embodiment of the present invention.

[0038] The accompanying drawings are marked as follows: 101, mounting seat; 102, mounting hole; 103, limiting plate; 104, T-shaped guide plate; 105, body; 106, extension; 107, T-shaped slide; 108, fixing plate; 109, slot; 110, first plug hole; 111, second plug hole; 112, anti-collision pad; 201, shell; 202, first plug rod; 203, limiting plate; 204, first spring; 205, pull plate; 301, moving rod; 302, first shaft pin; 303, connecting rod; 304, second shaft pin; 305, lifting Plate; 306, second plug rod; 307, first telescopic rod; 308, first tension spring; 311, light bar; 312, moving block; 313, limit block; 401, first hinge seat; 402, seesaw; 403, second tension spring; 404, second telescopic rod; 405, groove; 406, third plug plate; 407, strip opening; 501, second hinge seat; 502, protective shell; 503, notch; 504, clamping rod; 505, clamping seat; 506, handle; 507, handle cover; 508, heat dissipation port; 509, protective net. DETAILED DESCRIPTION

[0039] The following descriptions of the embodiments are with reference to the accompanying drawings to illustrate specific embodiments in which the present invention can be implemented. In the description of the present invention, it should be understood that the terms "longitudinal", "length", "circumferential", "front", "rear", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0040] Please also refer to Figures 1 to 13 As shown, an embodiment of the present invention provides a miniature metering circuit breaker, comprising:

[0041] The mounting seat 101 has mounting holes 102 at its four corners;

[0042] The limiting plate 103 is arranged at the top of the mounting seat 101 and is located between the two sets of T-shaped guide plates 104;

[0043] The body 105 has two groups of extensions 106 and a group of fixing plates 108 at its bottom, and a slot 109 is provided at the bottom of the fixing plates 108; a group of T-shaped slide grooves 107 are provided at the bottom of each group of the extensions 106, and a group of first plug holes 110 are provided on each group of the extensions 106;

[0044] A first clamping assembly, disposed at the top of the mounting seat 101, and used for clamping with the first plug hole 110;

[0045] A second clamping assembly is disposed between the two groups of the extension portions 106 and is used to realize secondary clamping of the body 105;

[0046] A third clamping assembly is installed in the chamber inside the mounting seat 101 and is used for three-time clamping of the body 105;

[0047] The protective shell assembly is disposed on the top of the mounting seat 101 and is used to protect the body 105 .

[0048] Specifically, the first clamping assembly includes a shell 201, a first plug rod 202, a limiting plate 203, a first spring 204 and a pull plate 205. The shell 201 is arranged on the top of the mounting seat 101. The first plug rod 202 passes through the shell 201 and is slidably connected to the shell 201. The first plug rod 202 is adapted to the first socket 110. The limiting plate 203 is installed on the first plug rod 202 inside the shell 201. The first spring 204 is installed at one end of the first plug rod 202 away from the adjacent first socket 110. The first spring 204 is inside the shell 201. The pull plate 205 is arranged at one end of the first plug rod 202 away from the first socket 110.

[0049] The second clamping assembly includes a moving rod 301, a first axle pin 302, a connecting rod 303, a second axle pin 304, a lifting plate 305, a second plug rod 306, a first telescopic rod 307 and a first tension spring 308. A group of moving rods 301 are slidably arranged in each group of first jacks 110, and a group of first axle pins 302 are respectively arranged at the ends of the two groups of moving rods 301 that are close to each other. One end of the two groups of moving rods 301 is hinged to one end of the corresponding moving rod 301 through the two groups of first axle pins 302. The other ends of the two groups of moving rods 301 are hinged to one end of the lifting plate 305 through a group of second axle pins 304 respectively. The bottom end of the lifting plate 305 is provided with a second plug rod 306, and the second plug rod 306 is adapted to the second socket 111. The top of the lifting plate 305 is provided with a first telescopic rod 307 and a first tension spring 308. The top ends of the first telescopic rod 307 and the first tension spring 308 are connected to the bottom end of the main body 105, and the fixed plate 108 is sleeved on the outside of the T-shaped slide groove 107.

[0050] In this embodiment, the two groups of T-shaped guide plates 104 slide into the two groups of T-shaped slots 107 respectively, and then the limiting plate 103 and the rear end of the body 105 are limited, and the two groups of pull plates 205 are mirror-imaged away, and the two groups of first plug rods 202 are further mirror-imaged away. When the rear end of the body 105 contacts the front end of the limiting plate 103, the first plug hole 110 overlaps with the first plug rod 202, and then the two groups of pull plates 205 are released, so that the two groups of limiting plates 203 respectively make the two groups of first plug rods 202 move closer to each other in a mirror-image manner under the action of the elastic force of the corresponding first springs 204, so that the two The first groups of rods 202 are respectively inserted into the adjacent first sockets 110 to complete a fixation. When the two groups of first rods 202 are respectively inserted into the corresponding two groups of first sockets 110, the two groups of first rods 202 push the two groups of moving rods 301, and the two groups of moving rods 301 are mirror-imaged and approached. Then, the two groups of moving rods 301 respectively drive the lifting plate 305 to move downward with the cooperation of the corresponding two groups of first axle pins 302, two groups of connecting rods 303 and two groups of second axle pins 304, and further the lifting plate 305 drives the second rod 306 to be inserted into the second socket 111 to complete the fixation. When the main body 105 needs to be released, the two groups of first plug rods 202 move away from each other in a mirrored manner, so that the first telescopic rod 307 drives the lifting plate 305 to rise under the tension of the first tension spring 308, and further releases the second plug rod 306 from the second plug hole 111. The second plug rod 306 activates the third clamping component and the slot 109 to clamp the main body 105 on the top of the mounting base 101.

[0051] As a further improvement of the embodiment of the present invention, the third clamping assembly includes a first hinge seat 401, a rocker 402, a second tension spring 403, a second telescopic rod 404, a groove 405, a third plug plate 406 and a strip opening 407. The first hinge seat 401 is arranged at the bottom end of the chamber, the middle part of the rocker 402 is hinged to the bottom end of the chamber with the cooperation of the first hinge seat 401, the third plug plate 406 is slidably connected to the mounting seat 101, and the third plug plate 406 is provided with a strip opening 407. The first end of the rocker 402 passes through the strip opening 407, and the bottom end of the third plug plate 406 is provided with a groove 405. The second tension spring 403 and the second telescopic rod 404 are arranged in the groove 405. The second tension spring 403 is sleeved on the outside of the second telescopic rod 404. The bottom ends of the second telescopic rod 404 and the second tension spring 403 are both connected to the bottom end of the chamber, and the bottom end of the rocker 402 is directly below the second socket 111.

[0052] The protective shell assembly includes a second hinged seat 501, a protective shell 502, a notch 503, a clamping rod 504 and a clamping seat 505. The protective shell 502 is hinged to the top of the mounting seat 101 through the second hinged seat 501. The protective shell 502 is provided with a notch 503, the notch 503 is provided with a clamping rod 504, and the top of the mounting seat 101 is provided with a clamping seat 505. The clamping rod 504 is clamped with the clamping seat 505. The main body 105 and the two groups of T-shaped guide plates 104 are all on the inner side of the protective shell 502, and threading holes are respectively provided on both sides of the protective shell 502.

[0053] A handle 506 is provided on the protective shell 502, and a handle cover 507 is mounted on the handle 506. A heat dissipation port 508 is provided at the top of the protective shell 502, and a protective net 509 is installed in the heat dissipation port 508. An anti-collision pad 112 is installed on the limiting plate 103. A group of optical bars 311 are respectively provided between the two groups of extensions 106, and a group of limiting blocks 313 are respectively provided at one end of each group of optical bars 311. A group of moving blocks 312 are respectively provided at the top of each group of moving rods 301, and each group of moving blocks 312 is respectively slidably connected to a group of optical bars 311.

[0054] In this embodiment, the two groups of T-shaped guide plates 104 slide into the two groups of T-shaped slots 107 respectively, and then the limiting plate 103 and the rear end of the body 105 are limited, and the two groups of pull plates 205 are mirror-imaged away, and the two groups of first plug rods 202 are further mirror-imaged away. When the rear end of the body 105 contacts the front end of the limiting plate 103, the first plug hole 110 overlaps with the first plug rod 202, and then the two groups of pull plates 205 are released, so that the two groups of limiting plates 203 respectively make the two groups of first plug rods 202 move closer to each other in a mirror-image manner under the action of the elastic force of the corresponding first springs 204, so that the two The first groups of rods 202 are respectively inserted into the adjacent first sockets 110 to complete a fixation. When the two groups of first rods 202 are respectively inserted into the corresponding two groups of first sockets 110, the two groups of first rods 202 push the two groups of moving rods 301, and the two groups of moving rods 301 are mirror-imaged and approached. Then, the two groups of moving rods 301 respectively drive the lifting plate 305 to move downward with the cooperation of the corresponding two groups of first axle pins 302, two groups of connecting rods 303 and two groups of second axle pins 304, and further the lifting plate 305 drives the second rod 306 to be inserted into the second socket 111 to complete the fixation. When the body 105 needs to be released from fixation, the two groups of first plug rods 202 move away from each other in a mirror image, so that the first telescopic rod 307 drives the lifting plate 305 to rise under the action of the tension of the first tension spring 308, and further releases the second plug rod 306 from the second plug hole 111. When the second plug rod 306 is inserted into the second plug hole 111 and the bottom end of the second plug rod 306 contacts the second end of the seesaw 402, the second end of the seesaw 402 moves downward, so that the first end of the seesaw 402 rises under the cooperation of the first hinge seat 401, and further the second end of the seesaw 402 is released. The end contacts the top of the strip opening 407 and raises the third plug plate 406, so that the third plug plate 406 enters the slot 109 to complete the three-time clamping of the main body 105. When the main body 105 is clamped on the mounting seat 101, the protective shell 502 is rotated with the cooperation of the second hinge seat 501, so that the main body 105 is inside the protective shell 502, and then the clamping seat 505 enters the notch 503 and is clamped with the clamping rod 504, so as to complete the fixing of the protective shell 502. The protective shell 502 protects the main body 105 and prevents foreign objects from hitting the main body 105.

[0055] In the embodiment of the present invention, the main body 105 is purchased on the market, and technicians in the industry only need to install and operate it according to the accompanying instruction manual, without the need for technicians in the field to make creative efforts.

[0056] It can be seen from the above description that compared with the prior art, the beneficial effects brought about by the embodiments of the present invention are: through the innovative design of the clamping assembly and the protective shell assembly, the three-way clamping and fixing of the circuit breaker body is realized, which effectively improves the stability and convenience of the installation. The present invention avoids the damage to the wall caused by the traditional screw connection method, reduces the difficulty and cost of the replacement operation, and improves the operation efficiency. At the same time, the design of the protective shell assembly not only protects the circuit breaker body from being hit by foreign objects, but also enhances the heat dissipation performance through the design of the heat dissipation port and the protective net, thereby extending the service life of the product. In addition, the setting of the handle and the handle cover improves the comfort of operation, while the design of the light bar and the limit block enhances the stability and safety of the product.

[0057] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A miniature metering circuit breaker, characterized in that: include: The mounting seat has mounting holes at its four corners; A limit plate, arranged at the top of the mounting seat and located between the two sets of guide plates; The body has two groups of extensions and a group of fixing plates at the bottom, and the fixing plates are provided with slots at the bottom; a group of slide grooves are provided at the bottom of each group of extensions, and a group of first jacks are provided on each group of extensions; A first clamping assembly, disposed at the top of the mounting seat, and used for clamping with the first jack; A second clamping assembly is disposed between the two groups of the extension parts and is used to realize secondary clamping of the body; A third clamping assembly is installed in the chamber inside the mounting seat and is used for three-time clamping of the body; A protective shell component is arranged on the top of the mounting seat and is used to protect the body.

2. The miniature metering circuit breaker according to claim 1, characterized in that: The first clamping assembly includes a shell, a first plug rod, a limiting plate, a first spring and a pull plate. The shell is arranged on the top of the mounting seat. The first plug rod passes through the shell and is slidably connected to the shell. The first plug rod is adapted to the first socket. The limiting plate is located inside the shell and is installed on the first plug rod. The first spring is installed at one end of the first plug rod away from the adjacent first socket. The first spring is located inside the shell. A pull plate is arranged at one end of the first plug rod away from the first socket.

3. The miniature metering circuit breaker according to claim 2, characterized in that: The second clamping assembly includes a moving rod, a first axle pin, a connecting rod, a second axle pin, a lifting plate, a second plug rod, a first telescopic rod and a first tension spring, wherein a group of the moving rods are slidably arranged in each group of first plug holes, a group of the first axle pins are respectively arranged at the ends close to each other of the two groups of the moving rods, one end of the two groups of the moving rods are respectively hinged to one end of the corresponding moving rods through the two groups of the first axle pins, and the other ends of the two groups of the moving rods are respectively hinged to one end of the lifting plate through a group of the second axle pin, the bottom end of the lifting plate is provided with the second plug rod, the second plug rod is adapted to the second plug hole, the top end of the lifting plate is provided with the first telescopic rod and the first tension spring, the top ends of the first telescopic rod and the first tension spring are both connected to the bottom end of the body, and the fixing plate is sleeved on the outside of the sliding groove.

4. The miniature metering circuit breaker according to claim 3, characterized in that: The third clamping assembly includes a first hinge seat, a rocker, a second tension spring, a second telescopic rod, a groove, a third plug plate and a strip opening. The first hinge seat is provided at the bottom end of the chamber, the middle part of the rocker is hinged to the bottom end of the chamber with the cooperation of the first hinge seat, the third plug plate is slidably connected with the mounting seat, the third plug plate is provided with the strip opening, the first end of the rocker passes through the strip opening, the groove is provided at the bottom end of the third plug plate, the second tension spring and the second telescopic rod are provided in the groove, the second tension spring is sleeved on the outside of the second telescopic rod, the bottom ends of the second telescopic rod and the second tension spring are connected to the bottom end of the chamber, and the bottom end of the rocker is directly below the second plug hole.

5. The miniature metering circuit breaker according to claim 1, characterized in that: The protective shell assembly includes a second hinged seat, a protective shell, a notch, a clamping rod and a clamping seat. The protective shell is hinged to the top of the mounting seat through the second hinged seat. The protective shell is provided with the notch, the clamping rod is provided on the notch, the clamping seat is provided on the top of the mounting seat, the clamping rod is clamped with the clamping seat, the main body and the two groups of guide plates are all on the inner side of the protective shell, and threading holes are respectively provided on both sides of the protective shell.

6. The miniature metering circuit breaker according to claim 5, characterized in that: The protective shell is provided with a handle, and the handle is sleeved with a handle cover.

7. The miniature metering circuit breaker according to claim 3, characterized in that: The bottom end of the second insertion rod is provided with a wear-resistant coating.

8. The miniature metering circuit breaker according to claim 5, characterized in that: The top of the protective shell is provided with a heat dissipation port, and a protective net is installed in the heat dissipation port.

9. The miniature metering circuit breaker according to claim 1, characterized in that: An anti-collision pad is installed on the limiting plate.

10. The miniature metering circuit breaker according to claim 3, characterized in that: A group of optical bars is respectively arranged between the two groups of extension parts, a group of limit blocks is respectively arranged at one end of each group of optical bars, a group of moving blocks is respectively arranged at the top of each group of moving rods, and each group of moving blocks is respectively slidably connected with a group of optical bars.

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